]>
Commit | Line | Data |
---|---|---|
f5166768 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/super.c |
ac27a0ec DK |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Laboratoire MASI - Institut Blaise Pascal | |
8 | * Universite Pierre et Marie Curie (Paris VI) | |
9 | * | |
10 | * from | |
11 | * | |
12 | * linux/fs/minix/inode.c | |
13 | * | |
14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
15 | * | |
16 | * Big-endian to little-endian byte-swapping/bitmaps by | |
17 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/time.h> | |
c5ca7c76 | 24 | #include <linux/vmalloc.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
66114cad | 28 | #include <linux/backing-dev.h> |
ac27a0ec | 29 | #include <linux/parser.h> |
ac27a0ec | 30 | #include <linux/buffer_head.h> |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
ef510424 | 41 | #include <linux/dax.h> |
7abc52c2 | 42 | #include <linux/cleancache.h> |
7c0f6ba6 | 43 | #include <linux/uaccess.h> |
ee73f9a5 | 44 | #include <linux/iversion.h> |
c83ad55e | 45 | #include <linux/unicode.h> |
0dcf2745 | 46 | #include <linux/user_namespace.h> |
ac27a0ec | 47 | |
bfff6873 LC |
48 | #include <linux/kthread.h> |
49 | #include <linux/freezer.h> | |
50 | ||
3dcf5451 | 51 | #include "ext4.h" |
4a092d73 | 52 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 53 | #include "ext4_jbd2.h" |
ac27a0ec DK |
54 | #include "xattr.h" |
55 | #include "acl.h" | |
3661d286 | 56 | #include "mballoc.h" |
0c9ec4be | 57 | #include "fsmap.h" |
ac27a0ec | 58 | |
9bffad1e TT |
59 | #define CREATE_TRACE_POINTS |
60 | #include <trace/events/ext4.h> | |
61 | ||
0b75a840 LC |
62 | static struct ext4_lazy_init *ext4_li_info; |
63 | static struct mutex ext4_li_mtx; | |
e294a537 | 64 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
9f6200bb | 65 | |
617ba13b | 66 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 67 | unsigned long journal_devnum); |
2adf6da8 | 68 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 69 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
70 | static void ext4_mark_recovery_complete(struct super_block *sb, |
71 | struct ext4_super_block *es); | |
72 | static void ext4_clear_journal_err(struct super_block *sb, | |
73 | struct ext4_super_block *es); | |
617ba13b | 74 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 TT |
75 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
76 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 77 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 78 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
79 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
80 | const char *dev_name, void *data); | |
2035e776 TT |
81 | static inline int ext2_feature_set_ok(struct super_block *sb); |
82 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 83 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
84 | static void ext4_destroy_lazyinit_thread(void); |
85 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 86 | static void ext4_clear_request_list(void); |
c6cb7e77 EW |
87 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
88 | unsigned int journal_inum); | |
ac27a0ec | 89 | |
e74031fd JK |
90 | /* |
91 | * Lock ordering | |
92 | * | |
93 | * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and | |
94 | * i_mmap_rwsem (inode->i_mmap_rwsem)! | |
95 | * | |
96 | * page fault path: | |
97 | * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> | |
98 | * page lock -> i_data_sem (rw) | |
99 | * | |
100 | * buffered write path: | |
101 | * sb_start_write -> i_mutex -> mmap_sem | |
102 | * sb_start_write -> i_mutex -> transaction start -> page lock -> | |
103 | * i_data_sem (rw) | |
104 | * | |
105 | * truncate: | |
1d39834f NB |
106 | * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock |
107 | * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start -> | |
108 | * i_data_sem (rw) | |
e74031fd JK |
109 | * |
110 | * direct IO: | |
1d39834f NB |
111 | * sb_start_write -> i_mutex -> mmap_sem |
112 | * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) | |
e74031fd JK |
113 | * |
114 | * writepages: | |
115 | * transaction start -> page lock(s) -> i_data_sem (rw) | |
116 | */ | |
117 | ||
0c3fded3 SF |
118 | static bool userns_mounts = false; |
119 | module_param(userns_mounts, bool, 0644); | |
120 | MODULE_PARM_DESC(userns_mounts, "Allow mounts from unprivileged user namespaces"); | |
121 | ||
c290ea01 | 122 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
2035e776 TT |
123 | static struct file_system_type ext2_fs_type = { |
124 | .owner = THIS_MODULE, | |
125 | .name = "ext2", | |
126 | .mount = ext4_mount, | |
127 | .kill_sb = kill_block_super, | |
0dcf2745 | 128 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
2035e776 | 129 | }; |
7f78e035 | 130 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 131 | MODULE_ALIAS("ext2"); |
2035e776 TT |
132 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
133 | #else | |
134 | #define IS_EXT2_SB(sb) (0) | |
135 | #endif | |
136 | ||
137 | ||
ba69f9ab JK |
138 | static struct file_system_type ext3_fs_type = { |
139 | .owner = THIS_MODULE, | |
140 | .name = "ext3", | |
152a0836 | 141 | .mount = ext4_mount, |
ba69f9ab | 142 | .kill_sb = kill_block_super, |
0dcf2745 | 143 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
ba69f9ab | 144 | }; |
7f78e035 | 145 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 146 | MODULE_ALIAS("ext3"); |
ba69f9ab | 147 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
bd81d8ee | 148 | |
fb265c9c TT |
149 | /* |
150 | * This works like sb_bread() except it uses ERR_PTR for error | |
151 | * returns. Currently with sb_bread it's impossible to distinguish | |
152 | * between ENOMEM and EIO situations (since both result in a NULL | |
153 | * return. | |
154 | */ | |
155 | struct buffer_head * | |
156 | ext4_sb_bread(struct super_block *sb, sector_t block, int op_flags) | |
157 | { | |
158 | struct buffer_head *bh = sb_getblk(sb, block); | |
159 | ||
160 | if (bh == NULL) | |
161 | return ERR_PTR(-ENOMEM); | |
162 | if (buffer_uptodate(bh)) | |
163 | return bh; | |
164 | ll_rw_block(REQ_OP_READ, REQ_META | op_flags, 1, &bh); | |
165 | wait_on_buffer(bh); | |
166 | if (buffer_uptodate(bh)) | |
167 | return bh; | |
168 | put_bh(bh); | |
169 | return ERR_PTR(-EIO); | |
170 | } | |
171 | ||
d25425f8 DW |
172 | static int ext4_verify_csum_type(struct super_block *sb, |
173 | struct ext4_super_block *es) | |
174 | { | |
e2b911c5 | 175 | if (!ext4_has_feature_metadata_csum(sb)) |
d25425f8 DW |
176 | return 1; |
177 | ||
178 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
179 | } | |
180 | ||
a9c47317 DW |
181 | static __le32 ext4_superblock_csum(struct super_block *sb, |
182 | struct ext4_super_block *es) | |
183 | { | |
184 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
185 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
186 | __u32 csum; | |
187 | ||
188 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
189 | ||
190 | return cpu_to_le32(csum); | |
191 | } | |
192 | ||
c197855e SH |
193 | static int ext4_superblock_csum_verify(struct super_block *sb, |
194 | struct ext4_super_block *es) | |
a9c47317 | 195 | { |
9aa5d32b | 196 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
197 | return 1; |
198 | ||
199 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
200 | } | |
201 | ||
06db49e6 | 202 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 203 | { |
06db49e6 TT |
204 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
205 | ||
9aa5d32b | 206 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
207 | return; |
208 | ||
209 | es->s_checksum = ext4_superblock_csum(sb, es); | |
210 | } | |
211 | ||
9933fc0a TT |
212 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
213 | { | |
214 | void *ret; | |
215 | ||
8be04b93 | 216 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
217 | if (!ret) |
218 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
223 | { | |
224 | void *ret; | |
225 | ||
8be04b93 | 226 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
227 | if (!ret) |
228 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
229 | return ret; | |
230 | } | |
231 | ||
8fadc143 AR |
232 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
233 | struct ext4_group_desc *bg) | |
bd81d8ee | 234 | { |
3a14589c | 235 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 236 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 237 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
238 | } |
239 | ||
8fadc143 AR |
240 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
241 | struct ext4_group_desc *bg) | |
bd81d8ee | 242 | { |
5272f837 | 243 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 244 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 245 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
246 | } |
247 | ||
8fadc143 AR |
248 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
249 | struct ext4_group_desc *bg) | |
bd81d8ee | 250 | { |
5272f837 | 251 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 252 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 253 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
254 | } |
255 | ||
021b65bb TT |
256 | __u32 ext4_free_group_clusters(struct super_block *sb, |
257 | struct ext4_group_desc *bg) | |
560671a0 AK |
258 | { |
259 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
260 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 261 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
262 | } |
263 | ||
264 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
265 | struct ext4_group_desc *bg) | |
266 | { | |
267 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
268 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 269 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
270 | } |
271 | ||
272 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
273 | struct ext4_group_desc *bg) | |
274 | { | |
275 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
276 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 277 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
278 | } |
279 | ||
280 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
281 | struct ext4_group_desc *bg) | |
282 | { | |
283 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
284 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 285 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
286 | } |
287 | ||
8fadc143 AR |
288 | void ext4_block_bitmap_set(struct super_block *sb, |
289 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 290 | { |
3a14589c | 291 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
292 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
293 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
294 | } |
295 | ||
8fadc143 AR |
296 | void ext4_inode_bitmap_set(struct super_block *sb, |
297 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 298 | { |
5272f837 | 299 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
300 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
301 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
302 | } |
303 | ||
8fadc143 AR |
304 | void ext4_inode_table_set(struct super_block *sb, |
305 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 306 | { |
5272f837 | 307 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
308 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
309 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
310 | } |
311 | ||
021b65bb TT |
312 | void ext4_free_group_clusters_set(struct super_block *sb, |
313 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
314 | { |
315 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
316 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
317 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
318 | } | |
319 | ||
320 | void ext4_free_inodes_set(struct super_block *sb, | |
321 | struct ext4_group_desc *bg, __u32 count) | |
322 | { | |
323 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
324 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
325 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
326 | } | |
327 | ||
328 | void ext4_used_dirs_set(struct super_block *sb, | |
329 | struct ext4_group_desc *bg, __u32 count) | |
330 | { | |
331 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
332 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
333 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
334 | } | |
335 | ||
336 | void ext4_itable_unused_set(struct super_block *sb, | |
337 | struct ext4_group_desc *bg, __u32 count) | |
338 | { | |
339 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
340 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
341 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
342 | } | |
343 | ||
6a0678a7 AB |
344 | static void __ext4_update_tstamp(__le32 *lo, __u8 *hi) |
345 | { | |
346 | time64_t now = ktime_get_real_seconds(); | |
347 | ||
348 | now = clamp_val(now, 0, (1ull << 40) - 1); | |
349 | ||
350 | *lo = cpu_to_le32(lower_32_bits(now)); | |
351 | *hi = upper_32_bits(now); | |
352 | } | |
353 | ||
354 | static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) | |
355 | { | |
356 | return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); | |
357 | } | |
358 | #define ext4_update_tstamp(es, tstamp) \ | |
359 | __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) | |
360 | #define ext4_get_tstamp(es, tstamp) \ | |
361 | __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) | |
d3d1faf6 | 362 | |
1c13d5c0 TT |
363 | static void __save_error_info(struct super_block *sb, const char *func, |
364 | unsigned int line) | |
365 | { | |
366 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
367 | ||
368 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
1b46617b TT |
369 | if (bdev_read_only(sb->s_bdev)) |
370 | return; | |
1c13d5c0 | 371 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
6a0678a7 | 372 | ext4_update_tstamp(es, s_last_error_time); |
1c13d5c0 TT |
373 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); |
374 | es->s_last_error_line = cpu_to_le32(line); | |
375 | if (!es->s_first_error_time) { | |
376 | es->s_first_error_time = es->s_last_error_time; | |
6a0678a7 | 377 | es->s_first_error_time_hi = es->s_last_error_time_hi; |
1c13d5c0 TT |
378 | strncpy(es->s_first_error_func, func, |
379 | sizeof(es->s_first_error_func)); | |
380 | es->s_first_error_line = cpu_to_le32(line); | |
381 | es->s_first_error_ino = es->s_last_error_ino; | |
382 | es->s_first_error_block = es->s_last_error_block; | |
383 | } | |
66e61a9e TT |
384 | /* |
385 | * Start the daily error reporting function if it hasn't been | |
386 | * started already | |
387 | */ | |
388 | if (!es->s_error_count) | |
389 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 390 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
391 | } |
392 | ||
393 | static void save_error_info(struct super_block *sb, const char *func, | |
394 | unsigned int line) | |
395 | { | |
396 | __save_error_info(sb, func, line); | |
397 | ext4_commit_super(sb, 1); | |
398 | } | |
399 | ||
bdfe0cbd TT |
400 | /* |
401 | * The del_gendisk() function uninitializes the disk-specific data | |
402 | * structures, including the bdi structure, without telling anyone | |
403 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
404 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
405 | * This is a kludge to prevent these oops until we can put in a proper | |
406 | * hook in del_gendisk() to inform the VFS and file system layers. | |
407 | */ | |
408 | static int block_device_ejected(struct super_block *sb) | |
409 | { | |
410 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
411 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); | |
412 | ||
413 | return bdi->dev == NULL; | |
414 | } | |
415 | ||
18aadd47 BJ |
416 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
417 | { | |
418 | struct super_block *sb = journal->j_private; | |
419 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
420 | int error = is_journal_aborted(journal); | |
5d3ee208 | 421 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 422 | |
5d3ee208 | 423 | BUG_ON(txn->t_state == T_FINISHED); |
a0154344 DJ |
424 | |
425 | ext4_process_freed_data(sb, txn->t_tid); | |
426 | ||
18aadd47 | 427 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
428 | while (!list_empty(&txn->t_private_list)) { |
429 | jce = list_entry(txn->t_private_list.next, | |
430 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
431 | list_del_init(&jce->jce_list); |
432 | spin_unlock(&sbi->s_md_lock); | |
433 | jce->jce_func(sb, jce, error); | |
434 | spin_lock(&sbi->s_md_lock); | |
435 | } | |
436 | spin_unlock(&sbi->s_md_lock); | |
437 | } | |
1c13d5c0 | 438 | |
1dc1097f JK |
439 | static bool system_going_down(void) |
440 | { | |
441 | return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF | |
442 | || system_state == SYSTEM_RESTART; | |
443 | } | |
444 | ||
ac27a0ec DK |
445 | /* Deal with the reporting of failure conditions on a filesystem such as |
446 | * inconsistencies detected or read IO failures. | |
447 | * | |
448 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 449 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
450 | * write ordering constraints on the superblock which prevent us from |
451 | * writing it out straight away; and given that the journal is about to | |
452 | * be aborted, we can't rely on the current, or future, transactions to | |
453 | * write out the superblock safely. | |
454 | * | |
dab291af | 455 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 456 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
457 | * that error until we've noted it down and cleared it. |
458 | */ | |
459 | ||
617ba13b | 460 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 461 | { |
327eaf73 TT |
462 | if (test_opt(sb, WARN_ON_ERROR)) |
463 | WARN_ON_ONCE(1); | |
464 | ||
bc98a42c | 465 | if (sb_rdonly(sb)) |
ac27a0ec DK |
466 | return; |
467 | ||
2b2d6d01 | 468 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 469 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 470 | |
4ab2f15b | 471 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 472 | if (journal) |
dab291af | 473 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 474 | } |
1dc1097f JK |
475 | /* |
476 | * We force ERRORS_RO behavior when system is rebooting. Otherwise we | |
477 | * could panic during 'reboot -f' as the underlying device got already | |
478 | * disabled. | |
479 | */ | |
480 | if (test_opt(sb, ERRORS_RO) || system_going_down()) { | |
b31e1552 | 481 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
482 | /* |
483 | * Make sure updated value of ->s_mount_flags will be visible | |
484 | * before ->s_flags update | |
485 | */ | |
486 | smp_wmb(); | |
1751e8a6 | 487 | sb->s_flags |= SB_RDONLY; |
1dc1097f | 488 | } else if (test_opt(sb, ERRORS_PANIC)) { |
4327ba52 DJ |
489 | if (EXT4_SB(sb)->s_journal && |
490 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
491 | return; | |
617ba13b | 492 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec | 493 | sb->s_id); |
4327ba52 | 494 | } |
ac27a0ec DK |
495 | } |
496 | ||
efbed4dc TT |
497 | #define ext4_error_ratelimit(sb) \ |
498 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
499 | "EXT4-fs error") | |
500 | ||
12062ddd | 501 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 502 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 503 | { |
0ff2ea7d | 504 | struct va_format vaf; |
ac27a0ec DK |
505 | va_list args; |
506 | ||
0db1ff22 TT |
507 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
508 | return; | |
509 | ||
ccf0f32a | 510 | trace_ext4_error(sb, function, line); |
efbed4dc TT |
511 | if (ext4_error_ratelimit(sb)) { |
512 | va_start(args, fmt); | |
513 | vaf.fmt = fmt; | |
514 | vaf.va = &args; | |
515 | printk(KERN_CRIT | |
516 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
517 | sb->s_id, function, line, current->comm, &vaf); | |
518 | va_end(args); | |
519 | } | |
f3fc0210 | 520 | save_error_info(sb, function, line); |
617ba13b | 521 | ext4_handle_error(sb); |
ac27a0ec DK |
522 | } |
523 | ||
e7c96e8e JP |
524 | void __ext4_error_inode(struct inode *inode, const char *function, |
525 | unsigned int line, ext4_fsblk_t block, | |
526 | const char *fmt, ...) | |
273df556 FM |
527 | { |
528 | va_list args; | |
f7c21177 | 529 | struct va_format vaf; |
1c13d5c0 | 530 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 531 | |
0db1ff22 TT |
532 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
533 | return; | |
534 | ||
ccf0f32a | 535 | trace_ext4_error(inode->i_sb, function, line); |
1c13d5c0 TT |
536 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
537 | es->s_last_error_block = cpu_to_le64(block); | |
efbed4dc TT |
538 | if (ext4_error_ratelimit(inode->i_sb)) { |
539 | va_start(args, fmt); | |
540 | vaf.fmt = fmt; | |
541 | vaf.va = &args; | |
542 | if (block) | |
543 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
544 | "inode #%lu: block %llu: comm %s: %pV\n", | |
545 | inode->i_sb->s_id, function, line, inode->i_ino, | |
546 | block, current->comm, &vaf); | |
547 | else | |
548 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
549 | "inode #%lu: comm %s: %pV\n", | |
550 | inode->i_sb->s_id, function, line, inode->i_ino, | |
551 | current->comm, &vaf); | |
552 | va_end(args); | |
553 | } | |
1c13d5c0 | 554 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
555 | ext4_handle_error(inode->i_sb); |
556 | } | |
557 | ||
e7c96e8e JP |
558 | void __ext4_error_file(struct file *file, const char *function, |
559 | unsigned int line, ext4_fsblk_t block, | |
560 | const char *fmt, ...) | |
273df556 FM |
561 | { |
562 | va_list args; | |
f7c21177 | 563 | struct va_format vaf; |
1c13d5c0 | 564 | struct ext4_super_block *es; |
496ad9aa | 565 | struct inode *inode = file_inode(file); |
273df556 FM |
566 | char pathname[80], *path; |
567 | ||
0db1ff22 TT |
568 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
569 | return; | |
570 | ||
ccf0f32a | 571 | trace_ext4_error(inode->i_sb, function, line); |
1c13d5c0 TT |
572 | es = EXT4_SB(inode->i_sb)->s_es; |
573 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
efbed4dc | 574 | if (ext4_error_ratelimit(inode->i_sb)) { |
9bf39ab2 | 575 | path = file_path(file, pathname, sizeof(pathname)); |
efbed4dc TT |
576 | if (IS_ERR(path)) |
577 | path = "(unknown)"; | |
578 | va_start(args, fmt); | |
579 | vaf.fmt = fmt; | |
580 | vaf.va = &args; | |
581 | if (block) | |
582 | printk(KERN_CRIT | |
583 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
584 | "block %llu: comm %s: path %s: %pV\n", | |
585 | inode->i_sb->s_id, function, line, inode->i_ino, | |
586 | block, current->comm, path, &vaf); | |
587 | else | |
588 | printk(KERN_CRIT | |
589 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
590 | "comm %s: path %s: %pV\n", | |
591 | inode->i_sb->s_id, function, line, inode->i_ino, | |
592 | current->comm, path, &vaf); | |
593 | va_end(args); | |
594 | } | |
1c13d5c0 | 595 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
596 | ext4_handle_error(inode->i_sb); |
597 | } | |
598 | ||
722887dd TT |
599 | const char *ext4_decode_error(struct super_block *sb, int errno, |
600 | char nbuf[16]) | |
ac27a0ec DK |
601 | { |
602 | char *errstr = NULL; | |
603 | ||
604 | switch (errno) { | |
6a797d27 DW |
605 | case -EFSCORRUPTED: |
606 | errstr = "Corrupt filesystem"; | |
607 | break; | |
608 | case -EFSBADCRC: | |
609 | errstr = "Filesystem failed CRC"; | |
610 | break; | |
ac27a0ec DK |
611 | case -EIO: |
612 | errstr = "IO failure"; | |
613 | break; | |
614 | case -ENOMEM: | |
615 | errstr = "Out of memory"; | |
616 | break; | |
617 | case -EROFS: | |
78f1ddbb TT |
618 | if (!sb || (EXT4_SB(sb)->s_journal && |
619 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
620 | errstr = "Journal has aborted"; |
621 | else | |
622 | errstr = "Readonly filesystem"; | |
623 | break; | |
624 | default: | |
625 | /* If the caller passed in an extra buffer for unknown | |
626 | * errors, textualise them now. Else we just return | |
627 | * NULL. */ | |
628 | if (nbuf) { | |
629 | /* Check for truncated error codes... */ | |
630 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
631 | errstr = nbuf; | |
632 | } | |
633 | break; | |
634 | } | |
635 | ||
636 | return errstr; | |
637 | } | |
638 | ||
617ba13b | 639 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
640 | * automatically and invokes the appropriate error response. */ |
641 | ||
c398eda0 TT |
642 | void __ext4_std_error(struct super_block *sb, const char *function, |
643 | unsigned int line, int errno) | |
ac27a0ec DK |
644 | { |
645 | char nbuf[16]; | |
646 | const char *errstr; | |
647 | ||
0db1ff22 TT |
648 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
649 | return; | |
650 | ||
ac27a0ec DK |
651 | /* Special case: if the error is EROFS, and we're not already |
652 | * inside a transaction, then there's really no point in logging | |
653 | * an error. */ | |
bc98a42c | 654 | if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) |
ac27a0ec DK |
655 | return; |
656 | ||
efbed4dc TT |
657 | if (ext4_error_ratelimit(sb)) { |
658 | errstr = ext4_decode_error(sb, errno, nbuf); | |
659 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
660 | sb->s_id, function, line, errstr); | |
661 | } | |
ac27a0ec | 662 | |
efbed4dc | 663 | save_error_info(sb, function, line); |
617ba13b | 664 | ext4_handle_error(sb); |
ac27a0ec DK |
665 | } |
666 | ||
667 | /* | |
617ba13b | 668 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
669 | * abort function may be used to deal with unrecoverable failures such |
670 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
671 | * | |
672 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
673 | * unless the error response on the fs has been set to panic in which | |
674 | * case we take the easy way out and panic immediately. | |
675 | */ | |
676 | ||
c67d859e | 677 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 678 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 679 | { |
651e1c3b | 680 | struct va_format vaf; |
ac27a0ec DK |
681 | va_list args; |
682 | ||
0db1ff22 TT |
683 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
684 | return; | |
685 | ||
1c13d5c0 | 686 | save_error_info(sb, function, line); |
ac27a0ec | 687 | va_start(args, fmt); |
651e1c3b JP |
688 | vaf.fmt = fmt; |
689 | vaf.va = &args; | |
690 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", | |
691 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
692 | va_end(args); |
693 | ||
bc98a42c | 694 | if (sb_rdonly(sb) == 0) { |
1c13d5c0 | 695 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
1c13d5c0 | 696 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
697 | /* |
698 | * Make sure updated value of ->s_mount_flags will be visible | |
699 | * before ->s_flags update | |
700 | */ | |
701 | smp_wmb(); | |
1751e8a6 | 702 | sb->s_flags |= SB_RDONLY; |
1c13d5c0 TT |
703 | if (EXT4_SB(sb)->s_journal) |
704 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
705 | save_error_info(sb, function, line); | |
706 | } | |
2c1d0e36 | 707 | if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { |
4327ba52 DJ |
708 | if (EXT4_SB(sb)->s_journal && |
709 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
710 | return; | |
617ba13b | 711 | panic("EXT4-fs panic from previous error\n"); |
4327ba52 | 712 | } |
ac27a0ec DK |
713 | } |
714 | ||
e7c96e8e JP |
715 | void __ext4_msg(struct super_block *sb, |
716 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 717 | { |
0ff2ea7d | 718 | struct va_format vaf; |
b31e1552 ES |
719 | va_list args; |
720 | ||
efbed4dc TT |
721 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
722 | return; | |
723 | ||
b31e1552 | 724 | va_start(args, fmt); |
0ff2ea7d JP |
725 | vaf.fmt = fmt; |
726 | vaf.va = &args; | |
727 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
728 | va_end(args); |
729 | } | |
730 | ||
b03a2f7e AD |
731 | #define ext4_warning_ratelimit(sb) \ |
732 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
733 | "EXT4-fs warning") | |
734 | ||
12062ddd | 735 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 736 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 737 | { |
0ff2ea7d | 738 | struct va_format vaf; |
ac27a0ec DK |
739 | va_list args; |
740 | ||
b03a2f7e | 741 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
742 | return; |
743 | ||
ac27a0ec | 744 | va_start(args, fmt); |
0ff2ea7d JP |
745 | vaf.fmt = fmt; |
746 | vaf.va = &args; | |
747 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
748 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
749 | va_end(args); |
750 | } | |
751 | ||
b03a2f7e AD |
752 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
753 | unsigned int line, const char *fmt, ...) | |
754 | { | |
755 | struct va_format vaf; | |
756 | va_list args; | |
757 | ||
758 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
759 | return; | |
760 | ||
761 | va_start(args, fmt); | |
762 | vaf.fmt = fmt; | |
763 | vaf.va = &args; | |
764 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
765 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
766 | function, line, inode->i_ino, current->comm, &vaf); | |
767 | va_end(args); | |
768 | } | |
769 | ||
e29136f8 TT |
770 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
771 | struct super_block *sb, ext4_group_t grp, | |
772 | unsigned long ino, ext4_fsblk_t block, | |
773 | const char *fmt, ...) | |
5d1b1b3f AK |
774 | __releases(bitlock) |
775 | __acquires(bitlock) | |
776 | { | |
0ff2ea7d | 777 | struct va_format vaf; |
5d1b1b3f AK |
778 | va_list args; |
779 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
780 | ||
0db1ff22 TT |
781 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
782 | return; | |
783 | ||
ccf0f32a | 784 | trace_ext4_error(sb, function, line); |
1c13d5c0 TT |
785 | es->s_last_error_ino = cpu_to_le32(ino); |
786 | es->s_last_error_block = cpu_to_le64(block); | |
787 | __save_error_info(sb, function, line); | |
0ff2ea7d | 788 | |
efbed4dc TT |
789 | if (ext4_error_ratelimit(sb)) { |
790 | va_start(args, fmt); | |
791 | vaf.fmt = fmt; | |
792 | vaf.va = &args; | |
793 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
794 | sb->s_id, function, line, grp); | |
795 | if (ino) | |
796 | printk(KERN_CONT "inode %lu: ", ino); | |
797 | if (block) | |
798 | printk(KERN_CONT "block %llu:", | |
799 | (unsigned long long) block); | |
800 | printk(KERN_CONT "%pV\n", &vaf); | |
801 | va_end(args); | |
802 | } | |
5d1b1b3f | 803 | |
327eaf73 TT |
804 | if (test_opt(sb, WARN_ON_ERROR)) |
805 | WARN_ON_ONCE(1); | |
806 | ||
5d1b1b3f | 807 | if (test_opt(sb, ERRORS_CONT)) { |
e2d67052 | 808 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
809 | return; |
810 | } | |
1c13d5c0 | 811 | |
5d1b1b3f | 812 | ext4_unlock_group(sb, grp); |
06f29cc8 | 813 | ext4_commit_super(sb, 1); |
5d1b1b3f AK |
814 | ext4_handle_error(sb); |
815 | /* | |
816 | * We only get here in the ERRORS_RO case; relocking the group | |
817 | * may be dangerous, but nothing bad will happen since the | |
818 | * filesystem will have already been marked read/only and the | |
819 | * journal has been aborted. We return 1 as a hint to callers | |
820 | * who might what to use the return value from | |
25985edc | 821 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
822 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
823 | * aggressively from the ext4 function in question, with a | |
824 | * more appropriate error code. | |
825 | */ | |
826 | ext4_lock_group(sb, grp); | |
827 | return; | |
828 | } | |
829 | ||
db79e6d1 WS |
830 | void ext4_mark_group_bitmap_corrupted(struct super_block *sb, |
831 | ext4_group_t group, | |
832 | unsigned int flags) | |
833 | { | |
834 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
835 | struct ext4_group_info *grp = ext4_get_group_info(sb, group); | |
836 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); | |
9af0b3d1 WS |
837 | int ret; |
838 | ||
839 | if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { | |
840 | ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, | |
841 | &grp->bb_state); | |
842 | if (!ret) | |
843 | percpu_counter_sub(&sbi->s_freeclusters_counter, | |
844 | grp->bb_free); | |
db79e6d1 WS |
845 | } |
846 | ||
9af0b3d1 WS |
847 | if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { |
848 | ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, | |
849 | &grp->bb_state); | |
850 | if (!ret && gdp) { | |
db79e6d1 WS |
851 | int count; |
852 | ||
853 | count = ext4_free_inodes_count(sb, gdp); | |
854 | percpu_counter_sub(&sbi->s_freeinodes_counter, | |
855 | count); | |
856 | } | |
db79e6d1 WS |
857 | } |
858 | } | |
859 | ||
617ba13b | 860 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 861 | { |
617ba13b | 862 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 863 | |
617ba13b | 864 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
865 | return; |
866 | ||
12062ddd | 867 | ext4_warning(sb, |
ac27a0ec DK |
868 | "updating to rev %d because of new feature flag, " |
869 | "running e2fsck is recommended", | |
617ba13b | 870 | EXT4_DYNAMIC_REV); |
ac27a0ec | 871 | |
617ba13b MC |
872 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
873 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
874 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
875 | /* leave es->s_feature_*compat flags alone */ |
876 | /* es->s_uuid will be set by e2fsck if empty */ | |
877 | ||
878 | /* | |
879 | * The rest of the superblock fields should be zero, and if not it | |
880 | * means they are likely already in use, so leave them alone. We | |
881 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
882 | */ | |
883 | } | |
884 | ||
885 | /* | |
886 | * Open the external journal device | |
887 | */ | |
b31e1552 | 888 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
889 | { |
890 | struct block_device *bdev; | |
891 | char b[BDEVNAME_SIZE]; | |
892 | ||
d4d77629 | 893 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
894 | if (IS_ERR(bdev)) |
895 | goto fail; | |
896 | return bdev; | |
897 | ||
898 | fail: | |
b31e1552 | 899 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
900 | __bdevname(dev, b), PTR_ERR(bdev)); |
901 | return NULL; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Release the journal device | |
906 | */ | |
4385bab1 | 907 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 908 | { |
4385bab1 | 909 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
910 | } |
911 | ||
4385bab1 | 912 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
913 | { |
914 | struct block_device *bdev; | |
ac27a0ec DK |
915 | bdev = sbi->journal_bdev; |
916 | if (bdev) { | |
4385bab1 | 917 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
918 | sbi->journal_bdev = NULL; |
919 | } | |
ac27a0ec DK |
920 | } |
921 | ||
922 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
923 | { | |
617ba13b | 924 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
925 | } |
926 | ||
617ba13b | 927 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
928 | { |
929 | struct list_head *l; | |
930 | ||
b31e1552 ES |
931 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
932 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
933 | |
934 | printk(KERN_ERR "sb_info orphan list:\n"); | |
935 | list_for_each(l, &sbi->s_orphan) { | |
936 | struct inode *inode = orphan_list_entry(l); | |
937 | printk(KERN_ERR " " | |
938 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
939 | inode->i_sb->s_id, inode->i_ino, inode, | |
940 | inode->i_mode, inode->i_nlink, | |
941 | NEXT_ORPHAN(inode)); | |
942 | } | |
943 | } | |
944 | ||
957153fc JK |
945 | #ifdef CONFIG_QUOTA |
946 | static int ext4_quota_off(struct super_block *sb, int type); | |
947 | ||
948 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
949 | { | |
950 | int type; | |
951 | ||
964edf66 JK |
952 | /* Use our quota_off function to clear inode flags etc. */ |
953 | for (type = 0; type < EXT4_MAXQUOTAS; type++) | |
954 | ext4_quota_off(sb, type); | |
957153fc | 955 | } |
33458eab TT |
956 | |
957 | /* | |
958 | * This is a helper function which is used in the mount/remount | |
959 | * codepaths (which holds s_umount) to fetch the quota file name. | |
960 | */ | |
961 | static inline char *get_qf_name(struct super_block *sb, | |
962 | struct ext4_sb_info *sbi, | |
963 | int type) | |
964 | { | |
965 | return rcu_dereference_protected(sbi->s_qf_names[type], | |
966 | lockdep_is_held(&sb->s_umount)); | |
967 | } | |
957153fc JK |
968 | #else |
969 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
970 | { | |
971 | } | |
972 | #endif | |
973 | ||
2b2d6d01 | 974 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 975 | { |
617ba13b MC |
976 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
977 | struct ext4_super_block *es = sbi->s_es; | |
97abd7d4 | 978 | int aborted = 0; |
ef2cabf7 | 979 | int i, err; |
ac27a0ec | 980 | |
857ac889 | 981 | ext4_unregister_li_request(sb); |
957153fc | 982 | ext4_quota_off_umount(sb); |
e0ccfd95 | 983 | |
2e8fa54e | 984 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 985 | |
0390131b | 986 | if (sbi->s_journal) { |
97abd7d4 | 987 | aborted = is_journal_aborted(sbi->s_journal); |
0390131b FM |
988 | err = jbd2_journal_destroy(sbi->s_journal); |
989 | sbi->s_journal = NULL; | |
97abd7d4 | 990 | if ((err < 0) && !aborted) |
c67d859e | 991 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 992 | } |
d4edac31 | 993 | |
ebd173be | 994 | ext4_unregister_sysfs(sb); |
d3922a77 | 995 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 996 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
997 | ext4_release_system_zone(sb); |
998 | ext4_mb_release(sb); | |
999 | ext4_ext_release(sb); | |
d4edac31 | 1000 | |
bc98a42c | 1001 | if (!sb_rdonly(sb) && !aborted) { |
e2b911c5 | 1002 | ext4_clear_feature_journal_needs_recovery(sb); |
ac27a0ec | 1003 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 1004 | } |
bc98a42c | 1005 | if (!sb_rdonly(sb)) |
a8e25a83 AB |
1006 | ext4_commit_super(sb, 1); |
1007 | ||
ac27a0ec DK |
1008 | for (i = 0; i < sbi->s_gdb_count; i++) |
1009 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
1010 | kvfree(sbi->s_group_desc); |
1011 | kvfree(sbi->s_flex_groups); | |
57042651 | 1012 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
1013 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
1014 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 1015 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c8585c6f | 1016 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
ac27a0ec | 1017 | #ifdef CONFIG_QUOTA |
a2d4a646 | 1018 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
33458eab | 1019 | kfree(get_qf_name(sb, sbi, i)); |
ac27a0ec DK |
1020 | #endif |
1021 | ||
1022 | /* Debugging code just in case the in-memory inode orphan list | |
1023 | * isn't empty. The on-disk one can be non-empty if we've | |
1024 | * detected an error and taken the fs readonly, but the | |
1025 | * in-memory list had better be clean by this point. */ | |
1026 | if (!list_empty(&sbi->s_orphan)) | |
1027 | dump_orphan_list(sb, sbi); | |
1028 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
1029 | ||
89d96a6f | 1030 | sync_blockdev(sb->s_bdev); |
f98393a6 | 1031 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
1032 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
1033 | /* | |
1034 | * Invalidate the journal device's buffers. We don't want them | |
1035 | * floating about in memory - the physical journal device may | |
1036 | * hotswapped, and it breaks the `ro-after' testing code. | |
1037 | */ | |
1038 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 1039 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 1040 | ext4_blkdev_remove(sbi); |
ac27a0ec | 1041 | } |
50c15df6 CX |
1042 | |
1043 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); | |
1044 | sbi->s_ea_inode_cache = NULL; | |
1045 | ||
1046 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
1047 | sbi->s_ea_block_cache = NULL; | |
1048 | ||
c5e06d10 JL |
1049 | if (sbi->s_mmp_tsk) |
1050 | kthread_stop(sbi->s_mmp_tsk); | |
9060dd2c | 1051 | brelse(sbi->s_sbh); |
ac27a0ec | 1052 | sb->s_fs_info = NULL; |
3197ebdb TT |
1053 | /* |
1054 | * Now that we are completely done shutting down the | |
1055 | * superblock, we need to actually destroy the kobject. | |
1056 | */ | |
3197ebdb TT |
1057 | kobject_put(&sbi->s_kobj); |
1058 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
1059 | if (sbi->s_chksum_driver) |
1060 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 1061 | kfree(sbi->s_blockgroup_lock); |
5e405595 | 1062 | fs_put_dax(sbi->s_daxdev); |
c83ad55e GKB |
1063 | #ifdef CONFIG_UNICODE |
1064 | utf8_unload(sbi->s_encoding); | |
1065 | #endif | |
ac27a0ec | 1066 | kfree(sbi); |
ac27a0ec DK |
1067 | } |
1068 | ||
e18b890b | 1069 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
1070 | |
1071 | /* | |
1072 | * Called inside transaction, so use GFP_NOFS | |
1073 | */ | |
617ba13b | 1074 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 1075 | { |
617ba13b | 1076 | struct ext4_inode_info *ei; |
ac27a0ec | 1077 | |
e6b4f8da | 1078 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
1079 | if (!ei) |
1080 | return NULL; | |
0b8e58a1 | 1081 | |
ee73f9a5 | 1082 | inode_set_iversion(&ei->vfs_inode, 1); |
202ee5df | 1083 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
1084 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
1085 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
1086 | ext4_es_init_tree(&ei->i_es_tree); |
1087 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 1088 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 1089 | ei->i_es_all_nr = 0; |
edaa53ca | 1090 | ei->i_es_shk_nr = 0; |
dd475925 | 1091 | ei->i_es_shrink_lblk = 0; |
d2a17637 | 1092 | ei->i_reserved_data_blocks = 0; |
9d0be502 | 1093 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 1094 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 1095 | spin_lock_init(&(ei->i_block_reservation_lock)); |
1dc0aa46 | 1096 | ext4_init_pending_tree(&ei->i_pending_tree); |
a9e7f447 DM |
1097 | #ifdef CONFIG_QUOTA |
1098 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 1099 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 1100 | #endif |
8aefcd55 | 1101 | ei->jinode = NULL; |
2e8fa54e | 1102 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 1103 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
1104 | ei->i_sync_tid = 0; |
1105 | ei->i_datasync_tid = 0; | |
e27f41e1 | 1106 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 1107 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
ac27a0ec DK |
1108 | return &ei->vfs_inode; |
1109 | } | |
1110 | ||
7ff9c073 TT |
1111 | static int ext4_drop_inode(struct inode *inode) |
1112 | { | |
1113 | int drop = generic_drop_inode(inode); | |
1114 | ||
1115 | trace_ext4_drop_inode(inode, drop); | |
1116 | return drop; | |
1117 | } | |
1118 | ||
94053139 | 1119 | static void ext4_free_in_core_inode(struct inode *inode) |
fa0d7e3d | 1120 | { |
2c58d548 | 1121 | fscrypt_free_inode(inode); |
fa0d7e3d NP |
1122 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
1123 | } | |
1124 | ||
617ba13b | 1125 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 1126 | { |
9f7dd93d | 1127 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
1128 | ext4_msg(inode->i_sb, KERN_ERR, |
1129 | "Inode %lu (%p): orphan list check failed!", | |
1130 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
1131 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
1132 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
1133 | true); | |
1134 | dump_stack(); | |
1135 | } | |
ac27a0ec DK |
1136 | } |
1137 | ||
51cc5068 | 1138 | static void init_once(void *foo) |
ac27a0ec | 1139 | { |
617ba13b | 1140 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 1141 | |
a35afb83 | 1142 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 1143 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 1144 | init_rwsem(&ei->i_data_sem); |
ea3d7209 | 1145 | init_rwsem(&ei->i_mmap_sem); |
a35afb83 | 1146 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
1147 | } |
1148 | ||
e67bc2b3 | 1149 | static int __init init_inodecache(void) |
ac27a0ec | 1150 | { |
f8dd7c70 DW |
1151 | ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", |
1152 | sizeof(struct ext4_inode_info), 0, | |
1153 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| | |
1154 | SLAB_ACCOUNT), | |
1155 | offsetof(struct ext4_inode_info, i_data), | |
1156 | sizeof_field(struct ext4_inode_info, i_data), | |
1157 | init_once); | |
617ba13b | 1158 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1159 | return -ENOMEM; |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static void destroy_inodecache(void) | |
1164 | { | |
8c0a8537 KS |
1165 | /* |
1166 | * Make sure all delayed rcu free inodes are flushed before we | |
1167 | * destroy cache. | |
1168 | */ | |
1169 | rcu_barrier(); | |
617ba13b | 1170 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1171 | } |
1172 | ||
0930fcc1 | 1173 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1174 | { |
0930fcc1 | 1175 | invalidate_inode_buffers(inode); |
dbd5768f | 1176 | clear_inode(inode); |
9f754758 | 1177 | dquot_drop(inode); |
c2ea3fde | 1178 | ext4_discard_preallocations(inode); |
51865fda | 1179 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
1180 | if (EXT4_I(inode)->jinode) { |
1181 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1182 | EXT4_I(inode)->jinode); | |
1183 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1184 | EXT4_I(inode)->jinode = NULL; | |
1185 | } | |
3d204e24 | 1186 | fscrypt_put_encryption_info(inode); |
ac27a0ec DK |
1187 | } |
1188 | ||
1b961ac0 | 1189 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1190 | u64 ino, u32 generation) |
ac27a0ec | 1191 | { |
ac27a0ec | 1192 | struct inode *inode; |
ac27a0ec | 1193 | |
8a363970 | 1194 | /* |
ac27a0ec DK |
1195 | * Currently we don't know the generation for parent directory, so |
1196 | * a generation of 0 means "accept any" | |
1197 | */ | |
8a363970 | 1198 | inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); |
1d1fe1ee DH |
1199 | if (IS_ERR(inode)) |
1200 | return ERR_CAST(inode); | |
1201 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1202 | iput(inode); |
1203 | return ERR_PTR(-ESTALE); | |
1204 | } | |
1b961ac0 CH |
1205 | |
1206 | return inode; | |
1207 | } | |
1208 | ||
1209 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1210 | int fh_len, int fh_type) |
1b961ac0 CH |
1211 | { |
1212 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1213 | ext4_nfs_get_inode); | |
1214 | } | |
1215 | ||
1216 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1217 | int fh_len, int fh_type) |
1b961ac0 CH |
1218 | { |
1219 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1220 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1221 | } |
1222 | ||
fde87268 TT |
1223 | static int ext4_nfs_commit_metadata(struct inode *inode) |
1224 | { | |
1225 | struct writeback_control wbc = { | |
1226 | .sync_mode = WB_SYNC_ALL | |
1227 | }; | |
1228 | ||
1229 | trace_ext4_nfs_commit_metadata(inode); | |
1230 | return ext4_write_inode(inode, &wbc); | |
1231 | } | |
1232 | ||
c39a7f84 TO |
1233 | /* |
1234 | * Try to release metadata pages (indirect blocks, directories) which are | |
1235 | * mapped via the block device. Since these pages could have journal heads | |
1236 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1237 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1238 | */ | |
0b8e58a1 AD |
1239 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1240 | gfp_t wait) | |
c39a7f84 TO |
1241 | { |
1242 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1243 | ||
1244 | WARN_ON(PageChecked(page)); | |
1245 | if (!page_has_buffers(page)) | |
1246 | return 0; | |
1247 | if (journal) | |
1248 | return jbd2_journal_try_to_free_buffers(journal, page, | |
d0164adc | 1249 | wait & ~__GFP_DIRECT_RECLAIM); |
c39a7f84 TO |
1250 | return try_to_free_buffers(page); |
1251 | } | |
1252 | ||
643fa961 | 1253 | #ifdef CONFIG_FS_ENCRYPTION |
a7550b30 JK |
1254 | static int ext4_get_context(struct inode *inode, void *ctx, size_t len) |
1255 | { | |
1256 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1257 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); | |
1258 | } | |
1259 | ||
a7550b30 JK |
1260 | static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, |
1261 | void *fs_data) | |
1262 | { | |
2f8f5e76 | 1263 | handle_t *handle = fs_data; |
c1a5d5f6 | 1264 | int res, res2, credits, retries = 0; |
2f8f5e76 | 1265 | |
9ce0151a EB |
1266 | /* |
1267 | * Encrypting the root directory is not allowed because e2fsck expects | |
1268 | * lost+found to exist and be unencrypted, and encrypting the root | |
1269 | * directory would imply encrypting the lost+found directory as well as | |
1270 | * the filename "lost+found" itself. | |
1271 | */ | |
1272 | if (inode->i_ino == EXT4_ROOT_INO) | |
1273 | return -EPERM; | |
2f8f5e76 | 1274 | |
7d3e06a8 RZ |
1275 | if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) |
1276 | return -EINVAL; | |
1277 | ||
94840e3c EB |
1278 | res = ext4_convert_inline_data(inode); |
1279 | if (res) | |
1280 | return res; | |
1281 | ||
2f8f5e76 EB |
1282 | /* |
1283 | * If a journal handle was specified, then the encryption context is | |
1284 | * being set on a new inode via inheritance and is part of a larger | |
1285 | * transaction to create the inode. Otherwise the encryption context is | |
1286 | * being set on an existing inode in its own transaction. Only in the | |
1287 | * latter case should the "retry on ENOSPC" logic be used. | |
1288 | */ | |
a7550b30 | 1289 | |
2f8f5e76 EB |
1290 | if (handle) { |
1291 | res = ext4_xattr_set_handle(handle, inode, | |
1292 | EXT4_XATTR_INDEX_ENCRYPTION, | |
1293 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1294 | ctx, len, 0); | |
a7550b30 JK |
1295 | if (!res) { |
1296 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
1297 | ext4_clear_inode_state(inode, | |
1298 | EXT4_STATE_MAY_INLINE_DATA); | |
a3caa24b | 1299 | /* |
2ee6a576 EB |
1300 | * Update inode->i_flags - S_ENCRYPTED will be enabled, |
1301 | * S_DAX may be disabled | |
a3caa24b JK |
1302 | */ |
1303 | ext4_set_inode_flags(inode); | |
a7550b30 JK |
1304 | } |
1305 | return res; | |
1306 | } | |
1307 | ||
b8cb5a54 TE |
1308 | res = dquot_initialize(inode); |
1309 | if (res) | |
1310 | return res; | |
2f8f5e76 | 1311 | retry: |
af65207c TE |
1312 | res = ext4_xattr_set_credits(inode, len, false /* is_create */, |
1313 | &credits); | |
dec214d0 TE |
1314 | if (res) |
1315 | return res; | |
1316 | ||
c1a5d5f6 | 1317 | handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); |
a7550b30 JK |
1318 | if (IS_ERR(handle)) |
1319 | return PTR_ERR(handle); | |
1320 | ||
2f8f5e76 EB |
1321 | res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, |
1322 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1323 | ctx, len, 0); | |
a7550b30 JK |
1324 | if (!res) { |
1325 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
2ee6a576 EB |
1326 | /* |
1327 | * Update inode->i_flags - S_ENCRYPTED will be enabled, | |
1328 | * S_DAX may be disabled | |
1329 | */ | |
a3caa24b | 1330 | ext4_set_inode_flags(inode); |
a7550b30 JK |
1331 | res = ext4_mark_inode_dirty(handle, inode); |
1332 | if (res) | |
1333 | EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); | |
1334 | } | |
1335 | res2 = ext4_journal_stop(handle); | |
2f8f5e76 EB |
1336 | |
1337 | if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) | |
1338 | goto retry; | |
a7550b30 JK |
1339 | if (!res) |
1340 | res = res2; | |
1341 | return res; | |
1342 | } | |
1343 | ||
c250b7dd | 1344 | static bool ext4_dummy_context(struct inode *inode) |
a7550b30 JK |
1345 | { |
1346 | return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); | |
1347 | } | |
1348 | ||
6f69f0ed | 1349 | static const struct fscrypt_operations ext4_cryptops = { |
a5d431ef | 1350 | .key_prefix = "ext4:", |
a7550b30 | 1351 | .get_context = ext4_get_context, |
a7550b30 JK |
1352 | .set_context = ext4_set_context, |
1353 | .dummy_context = ext4_dummy_context, | |
a7550b30 | 1354 | .empty_dir = ext4_empty_dir, |
e12ee683 | 1355 | .max_namelen = EXT4_NAME_LEN, |
a7550b30 | 1356 | }; |
a7550b30 JK |
1357 | #endif |
1358 | ||
ac27a0ec | 1359 | #ifdef CONFIG_QUOTA |
d6006186 | 1360 | static const char * const quotatypes[] = INITQFNAMES; |
689c958c | 1361 | #define QTYPE2NAME(t) (quotatypes[t]) |
ac27a0ec | 1362 | |
617ba13b MC |
1363 | static int ext4_write_dquot(struct dquot *dquot); |
1364 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1365 | static int ext4_release_dquot(struct dquot *dquot); | |
1366 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1367 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1368 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 1369 | const struct path *path); |
617ba13b MC |
1370 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1371 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1372 | size_t len, loff_t off); |
617ba13b | 1373 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1374 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1375 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1376 | unsigned int flags); | |
1377 | static int ext4_enable_quotas(struct super_block *sb); | |
8f0e8746 | 1378 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); |
ac27a0ec | 1379 | |
96c7e0d9 JK |
1380 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1381 | { | |
1382 | return EXT4_I(inode)->i_dquot; | |
1383 | } | |
1384 | ||
61e225dc | 1385 | static const struct dquot_operations ext4_quota_operations = { |
7a9ca53a TE |
1386 | .get_reserved_space = ext4_get_reserved_space, |
1387 | .write_dquot = ext4_write_dquot, | |
1388 | .acquire_dquot = ext4_acquire_dquot, | |
1389 | .release_dquot = ext4_release_dquot, | |
1390 | .mark_dirty = ext4_mark_dquot_dirty, | |
1391 | .write_info = ext4_write_info, | |
1392 | .alloc_dquot = dquot_alloc, | |
1393 | .destroy_dquot = dquot_destroy, | |
1394 | .get_projid = ext4_get_projid, | |
1395 | .get_inode_usage = ext4_get_inode_usage, | |
1396 | .get_next_id = ext4_get_next_id, | |
ac27a0ec DK |
1397 | }; |
1398 | ||
0d54b217 | 1399 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1400 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1401 | .quota_off = ext4_quota_off, |
287a8095 | 1402 | .quota_sync = dquot_quota_sync, |
0a240339 | 1403 | .get_state = dquot_get_state, |
287a8095 CH |
1404 | .set_info = dquot_set_dqinfo, |
1405 | .get_dqblk = dquot_get_dqblk, | |
6332b9b5 ES |
1406 | .set_dqblk = dquot_set_dqblk, |
1407 | .get_nextdqblk = dquot_get_next_dqblk, | |
ac27a0ec DK |
1408 | }; |
1409 | #endif | |
1410 | ||
ee9b6d61 | 1411 | static const struct super_operations ext4_sops = { |
617ba13b | 1412 | .alloc_inode = ext4_alloc_inode, |
94053139 | 1413 | .free_inode = ext4_free_in_core_inode, |
617ba13b | 1414 | .destroy_inode = ext4_destroy_inode, |
617ba13b MC |
1415 | .write_inode = ext4_write_inode, |
1416 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1417 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1418 | .evict_inode = ext4_evict_inode, |
617ba13b | 1419 | .put_super = ext4_put_super, |
617ba13b | 1420 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1421 | .freeze_fs = ext4_freeze, |
1422 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1423 | .statfs = ext4_statfs, |
1424 | .remount_fs = ext4_remount, | |
617ba13b | 1425 | .show_options = ext4_show_options, |
ac27a0ec | 1426 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1427 | .quota_read = ext4_quota_read, |
1428 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1429 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1430 | #endif |
c39a7f84 | 1431 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1432 | }; |
1433 | ||
39655164 | 1434 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1435 | .fh_to_dentry = ext4_fh_to_dentry, |
1436 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1437 | .get_parent = ext4_get_parent, |
fde87268 | 1438 | .commit_metadata = ext4_nfs_commit_metadata, |
ac27a0ec DK |
1439 | }; |
1440 | ||
1441 | enum { | |
1442 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1443 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1444 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1445 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1446 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1447 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1448 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1449 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1450 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1451 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1452 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1453 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
49da9392 | 1454 | Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, |
327eaf73 TT |
1455 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, |
1456 | Opt_nowarn_on_error, Opt_mblk_io_submit, | |
670e9875 | 1457 | Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, |
1449032b | 1458 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1459 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1460 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1461 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
cdb7ee4c | 1462 | Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, |
ac27a0ec DK |
1463 | }; |
1464 | ||
a447c093 | 1465 | static const match_table_t tokens = { |
ac27a0ec DK |
1466 | {Opt_bsd_df, "bsddf"}, |
1467 | {Opt_minix_df, "minixdf"}, | |
1468 | {Opt_grpid, "grpid"}, | |
1469 | {Opt_grpid, "bsdgroups"}, | |
1470 | {Opt_nogrpid, "nogrpid"}, | |
1471 | {Opt_nogrpid, "sysvgroups"}, | |
1472 | {Opt_resgid, "resgid=%u"}, | |
1473 | {Opt_resuid, "resuid=%u"}, | |
1474 | {Opt_sb, "sb=%u"}, | |
1475 | {Opt_err_cont, "errors=continue"}, | |
1476 | {Opt_err_panic, "errors=panic"}, | |
1477 | {Opt_err_ro, "errors=remount-ro"}, | |
1478 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1479 | {Opt_debug, "debug"}, |
72578c33 TT |
1480 | {Opt_removed, "oldalloc"}, |
1481 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1482 | {Opt_user_xattr, "user_xattr"}, |
1483 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1484 | {Opt_acl, "acl"}, | |
1485 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1486 | {Opt_noload, "norecovery"}, |
5a916be1 | 1487 | {Opt_noload, "noload"}, |
72578c33 TT |
1488 | {Opt_removed, "nobh"}, |
1489 | {Opt_removed, "bh"}, | |
ac27a0ec | 1490 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1491 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1492 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1493 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1494 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1495 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1496 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1497 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1498 | {Opt_abort, "abort"}, |
1499 | {Opt_data_journal, "data=journal"}, | |
1500 | {Opt_data_ordered, "data=ordered"}, | |
1501 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1502 | {Opt_data_err_abort, "data_err=abort"}, |
1503 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1504 | {Opt_offusrjquota, "usrjquota="}, |
1505 | {Opt_usrjquota, "usrjquota=%s"}, | |
1506 | {Opt_offgrpjquota, "grpjquota="}, | |
1507 | {Opt_grpjquota, "grpjquota=%s"}, | |
1508 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1509 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1510 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1511 | {Opt_grpquota, "grpquota"}, |
1512 | {Opt_noquota, "noquota"}, | |
1513 | {Opt_quota, "quota"}, | |
1514 | {Opt_usrquota, "usrquota"}, | |
49da9392 | 1515 | {Opt_prjquota, "prjquota"}, |
ac27a0ec | 1516 | {Opt_barrier, "barrier=%u"}, |
06705bff TT |
1517 | {Opt_barrier, "barrier"}, |
1518 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1519 | {Opt_i_version, "i_version"}, |
923ae0ff | 1520 | {Opt_dax, "dax"}, |
c9de560d | 1521 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1522 | {Opt_delalloc, "delalloc"}, |
327eaf73 TT |
1523 | {Opt_warn_on_error, "warn_on_error"}, |
1524 | {Opt_nowarn_on_error, "nowarn_on_error"}, | |
a26f4992 TT |
1525 | {Opt_lazytime, "lazytime"}, |
1526 | {Opt_nolazytime, "nolazytime"}, | |
670e9875 | 1527 | {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, |
dd919b98 | 1528 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1529 | {Opt_removed, "mblk_io_submit"}, |
1530 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1531 | {Opt_block_validity, "block_validity"}, |
1532 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1533 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1534 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1535 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1536 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1537 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1538 | {Opt_dioread_nolock, "dioread_nolock"}, |
1539 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1540 | {Opt_discard, "discard"}, |
1541 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1542 | {Opt_init_itable, "init_itable=%u"}, |
1543 | {Opt_init_itable, "init_itable"}, | |
1544 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1545 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1546 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
cdb7ee4c TE |
1547 | {Opt_nombcache, "nombcache"}, |
1548 | {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ | |
c7198b9c TT |
1549 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1550 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1551 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1552 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1553 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1554 | {Opt_err, NULL}, |
ac27a0ec DK |
1555 | }; |
1556 | ||
617ba13b | 1557 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1558 | { |
617ba13b | 1559 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1560 | char *options = (char *) *data; |
1561 | ||
1562 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1563 | return 1; /* Default location */ | |
0b8e58a1 | 1564 | |
ac27a0ec | 1565 | options += 3; |
0b8e58a1 | 1566 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1567 | sb_block = simple_strtoul(options, &options, 0); |
1568 | if (*options && *options != ',') { | |
4776004f | 1569 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1570 | (char *) *data); |
1571 | return 1; | |
1572 | } | |
1573 | if (*options == ',') | |
1574 | options++; | |
1575 | *data = (void *) options; | |
0b8e58a1 | 1576 | |
ac27a0ec DK |
1577 | return sb_block; |
1578 | } | |
1579 | ||
b3881f74 | 1580 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
d6006186 EB |
1581 | static const char deprecated_msg[] = |
1582 | "Mount option \"%s\" will be removed by %s\n" | |
437ca0fd | 1583 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; |
b3881f74 | 1584 | |
56c50f11 DM |
1585 | #ifdef CONFIG_QUOTA |
1586 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1587 | { | |
1588 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
33458eab | 1589 | char *qname, *old_qname = get_qf_name(sb, sbi, qtype); |
03dafb5f | 1590 | int ret = -1; |
56c50f11 | 1591 | |
33458eab | 1592 | if (sb_any_quota_loaded(sb) && !old_qname) { |
56c50f11 DM |
1593 | ext4_msg(sb, KERN_ERR, |
1594 | "Cannot change journaled " | |
1595 | "quota options when quota turned on"); | |
57f73c2c | 1596 | return -1; |
56c50f11 | 1597 | } |
e2b911c5 | 1598 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1599 | ext4_msg(sb, KERN_INFO, "Journaled quota options " |
1600 | "ignored when QUOTA feature is enabled"); | |
1601 | return 1; | |
262b4662 | 1602 | } |
56c50f11 DM |
1603 | qname = match_strdup(args); |
1604 | if (!qname) { | |
1605 | ext4_msg(sb, KERN_ERR, | |
1606 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1607 | return -1; |
56c50f11 | 1608 | } |
33458eab TT |
1609 | if (old_qname) { |
1610 | if (strcmp(old_qname, qname) == 0) | |
03dafb5f CG |
1611 | ret = 1; |
1612 | else | |
1613 | ext4_msg(sb, KERN_ERR, | |
1614 | "%s quota file already specified", | |
1615 | QTYPE2NAME(qtype)); | |
1616 | goto errout; | |
56c50f11 | 1617 | } |
03dafb5f | 1618 | if (strchr(qname, '/')) { |
56c50f11 DM |
1619 | ext4_msg(sb, KERN_ERR, |
1620 | "quotafile must be on filesystem root"); | |
03dafb5f | 1621 | goto errout; |
56c50f11 | 1622 | } |
33458eab | 1623 | rcu_assign_pointer(sbi->s_qf_names[qtype], qname); |
fd8c37ec | 1624 | set_opt(sb, QUOTA); |
56c50f11 | 1625 | return 1; |
03dafb5f CG |
1626 | errout: |
1627 | kfree(qname); | |
1628 | return ret; | |
56c50f11 DM |
1629 | } |
1630 | ||
1631 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1632 | { | |
1633 | ||
1634 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
33458eab | 1635 | char *old_qname = get_qf_name(sb, sbi, qtype); |
56c50f11 | 1636 | |
33458eab | 1637 | if (sb_any_quota_loaded(sb) && old_qname) { |
56c50f11 DM |
1638 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" |
1639 | " when quota turned on"); | |
57f73c2c | 1640 | return -1; |
56c50f11 | 1641 | } |
33458eab TT |
1642 | rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); |
1643 | synchronize_rcu(); | |
1644 | kfree(old_qname); | |
56c50f11 DM |
1645 | return 1; |
1646 | } | |
1647 | #endif | |
1648 | ||
26092bf5 TT |
1649 | #define MOPT_SET 0x0001 |
1650 | #define MOPT_CLEAR 0x0002 | |
1651 | #define MOPT_NOSUPPORT 0x0004 | |
1652 | #define MOPT_EXPLICIT 0x0008 | |
1653 | #define MOPT_CLEAR_ERR 0x0010 | |
1654 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1655 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1656 | #define MOPT_Q 0 |
1657 | #define MOPT_QFMT 0x0040 | |
1658 | #else | |
1659 | #define MOPT_Q MOPT_NOSUPPORT | |
1660 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1661 | #endif |
26092bf5 | 1662 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1663 | #define MOPT_NO_EXT2 0x0100 |
1664 | #define MOPT_NO_EXT3 0x0200 | |
1665 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1666 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1667 | |
1668 | static const struct mount_opts { | |
1669 | int token; | |
1670 | int mount_opt; | |
1671 | int flags; | |
1672 | } ext4_mount_opts[] = { | |
1673 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1674 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1675 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1676 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1677 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1678 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1679 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1680 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1681 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1682 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1683 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1684 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1685 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1686 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1687 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1688 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
327eaf73 TT |
1689 | {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, |
1690 | {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, | |
c6d3d56d DW |
1691 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1692 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1693 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1694 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1695 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1696 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1697 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1698 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1699 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1700 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1701 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c | 1702 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1703 | MOPT_NO_EXT2}, |
8dc0aa8c | 1704 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1705 | MOPT_NO_EXT2}, |
26092bf5 TT |
1706 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1707 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1708 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1709 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1710 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1711 | {Opt_commit, 0, MOPT_GTE0}, | |
1712 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1713 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1714 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1715 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1716 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1717 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1718 | {Opt_resuid, 0, MOPT_GTE0}, |
1719 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1720 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1721 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1722 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1723 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1724 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1725 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1726 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1727 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1728 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1729 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1730 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1731 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1732 | #else |
26092bf5 TT |
1733 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1734 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1735 | #endif |
26092bf5 TT |
1736 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1737 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
670e9875 | 1738 | {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, |
26092bf5 TT |
1739 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, |
1740 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1741 | MOPT_SET | MOPT_Q}, | |
1742 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1743 | MOPT_SET | MOPT_Q}, | |
49da9392 JK |
1744 | {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, |
1745 | MOPT_SET | MOPT_Q}, | |
26092bf5 | 1746 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
49da9392 JK |
1747 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), |
1748 | MOPT_CLEAR | MOPT_Q}, | |
26092bf5 TT |
1749 | {Opt_usrjquota, 0, MOPT_Q}, |
1750 | {Opt_grpjquota, 0, MOPT_Q}, | |
1751 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1752 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1753 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1754 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1755 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1756 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1757 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
cdb7ee4c | 1758 | {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, |
26092bf5 TT |
1759 | {Opt_err, 0, 0} |
1760 | }; | |
1761 | ||
c83ad55e GKB |
1762 | #ifdef CONFIG_UNICODE |
1763 | static const struct ext4_sb_encodings { | |
1764 | __u16 magic; | |
1765 | char *name; | |
1766 | char *version; | |
1767 | } ext4_sb_encoding_map[] = { | |
1768 | {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, | |
1769 | }; | |
1770 | ||
1771 | static int ext4_sb_read_encoding(const struct ext4_super_block *es, | |
1772 | const struct ext4_sb_encodings **encoding, | |
1773 | __u16 *flags) | |
1774 | { | |
1775 | __u16 magic = le16_to_cpu(es->s_encoding); | |
1776 | int i; | |
1777 | ||
1778 | for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) | |
1779 | if (magic == ext4_sb_encoding_map[i].magic) | |
1780 | break; | |
1781 | ||
1782 | if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) | |
1783 | return -EINVAL; | |
1784 | ||
1785 | *encoding = &ext4_sb_encoding_map[i]; | |
1786 | *flags = le16_to_cpu(es->s_encoding_flags); | |
1787 | ||
1788 | return 0; | |
1789 | } | |
1790 | #endif | |
1791 | ||
26092bf5 TT |
1792 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, |
1793 | substring_t *args, unsigned long *journal_devnum, | |
1794 | unsigned int *journal_ioprio, int is_remount) | |
1795 | { | |
1796 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1797 | const struct mount_opts *m; | |
08cefc7a EB |
1798 | kuid_t uid; |
1799 | kgid_t gid; | |
26092bf5 TT |
1800 | int arg = 0; |
1801 | ||
57f73c2c TT |
1802 | #ifdef CONFIG_QUOTA |
1803 | if (token == Opt_usrjquota) | |
1804 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1805 | else if (token == Opt_grpjquota) | |
1806 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1807 | else if (token == Opt_offusrjquota) | |
1808 | return clear_qf_name(sb, USRQUOTA); | |
1809 | else if (token == Opt_offgrpjquota) | |
1810 | return clear_qf_name(sb, GRPQUOTA); | |
1811 | #endif | |
26092bf5 | 1812 | switch (token) { |
f7048605 TT |
1813 | case Opt_noacl: |
1814 | case Opt_nouser_xattr: | |
1815 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1816 | break; | |
26092bf5 TT |
1817 | case Opt_sb: |
1818 | return 1; /* handled by get_sb_block() */ | |
1819 | case Opt_removed: | |
5f3633e3 | 1820 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1821 | return 1; |
26092bf5 TT |
1822 | case Opt_abort: |
1823 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1824 | return 1; | |
1825 | case Opt_i_version: | |
357fdad0 | 1826 | sb->s_flags |= SB_I_VERSION; |
26092bf5 | 1827 | return 1; |
a26f4992 | 1828 | case Opt_lazytime: |
1751e8a6 | 1829 | sb->s_flags |= SB_LAZYTIME; |
a26f4992 TT |
1830 | return 1; |
1831 | case Opt_nolazytime: | |
1751e8a6 | 1832 | sb->s_flags &= ~SB_LAZYTIME; |
a26f4992 | 1833 | return 1; |
26092bf5 TT |
1834 | } |
1835 | ||
5f3633e3 JK |
1836 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1837 | if (token == m->token) | |
1838 | break; | |
1839 | ||
1840 | if (m->token == Opt_err) { | |
1841 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1842 | "or missing value", opt); | |
1843 | return -1; | |
1844 | } | |
1845 | ||
8dc0aa8c TT |
1846 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1847 | ext4_msg(sb, KERN_ERR, | |
1848 | "Mount option \"%s\" incompatible with ext2", opt); | |
1849 | return -1; | |
1850 | } | |
1851 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1852 | ext4_msg(sb, KERN_ERR, | |
1853 | "Mount option \"%s\" incompatible with ext3", opt); | |
1854 | return -1; | |
1855 | } | |
1856 | ||
0dcf2745 SF |
1857 | if (token == Opt_err_panic && !capable(CAP_SYS_ADMIN)) { |
1858 | ext4_msg(sb, KERN_ERR, | |
1859 | "Mount option \"%s\" not allowed for unprivileged mounts", | |
1860 | opt); | |
1861 | return -1; | |
1862 | } | |
1863 | ||
ad4eec61 | 1864 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1865 | return -1; |
1866 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1867 | return -1; | |
c93cf2d7 DM |
1868 | if (m->flags & MOPT_EXPLICIT) { |
1869 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1870 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1871 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1872 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1873 | } else |
1874 | return -1; | |
1875 | } | |
5f3633e3 JK |
1876 | if (m->flags & MOPT_CLEAR_ERR) |
1877 | clear_opt(sb, ERRORS_MASK); | |
1878 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1879 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1880 | "options when quota turned on"); | |
1881 | return -1; | |
1882 | } | |
1883 | ||
1884 | if (m->flags & MOPT_NOSUPPORT) { | |
1885 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1886 | } else if (token == Opt_commit) { | |
1887 | if (arg == 0) | |
1888 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1889 | sbi->s_commit_interval = HZ * arg; | |
670e9875 TT |
1890 | } else if (token == Opt_debug_want_extra_isize) { |
1891 | sbi->s_want_extra_isize = arg; | |
5f3633e3 | 1892 | } else if (token == Opt_max_batch_time) { |
5f3633e3 JK |
1893 | sbi->s_max_batch_time = arg; |
1894 | } else if (token == Opt_min_batch_time) { | |
1895 | sbi->s_min_batch_time = arg; | |
1896 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1897 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1898 | ext4_msg(sb, KERN_ERR, | |
1899 | "EXT4-fs: inode_readahead_blks must be " | |
1900 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1901 | return -1; |
5f3633e3 JK |
1902 | } |
1903 | sbi->s_inode_readahead_blks = arg; | |
1904 | } else if (token == Opt_init_itable) { | |
1905 | set_opt(sb, INIT_INODE_TABLE); | |
1906 | if (!args->from) | |
1907 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1908 | sbi->s_li_wait_mult = arg; | |
1909 | } else if (token == Opt_max_dir_size_kb) { | |
1910 | sbi->s_max_dir_size_kb = arg; | |
1911 | } else if (token == Opt_stripe) { | |
1912 | sbi->s_stripe = arg; | |
1913 | } else if (token == Opt_resuid) { | |
0dcf2745 | 1914 | uid = make_kuid(sb->s_user_ns, arg); |
5f3633e3 JK |
1915 | if (!uid_valid(uid)) { |
1916 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1917 | return -1; |
1918 | } | |
5f3633e3 JK |
1919 | sbi->s_resuid = uid; |
1920 | } else if (token == Opt_resgid) { | |
0dcf2745 | 1921 | gid = make_kgid(sb->s_user_ns, arg); |
5f3633e3 JK |
1922 | if (!gid_valid(gid)) { |
1923 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1924 | return -1; | |
1925 | } | |
1926 | sbi->s_resgid = gid; | |
1927 | } else if (token == Opt_journal_dev) { | |
1928 | if (is_remount) { | |
1929 | ext4_msg(sb, KERN_ERR, | |
1930 | "Cannot specify journal on remount"); | |
1931 | return -1; | |
1932 | } | |
1933 | *journal_devnum = arg; | |
ad4eec61 ES |
1934 | } else if (token == Opt_journal_path) { |
1935 | char *journal_path; | |
1936 | struct inode *journal_inode; | |
1937 | struct path path; | |
1938 | int error; | |
1939 | ||
1940 | if (is_remount) { | |
1941 | ext4_msg(sb, KERN_ERR, | |
1942 | "Cannot specify journal on remount"); | |
1943 | return -1; | |
1944 | } | |
1945 | journal_path = match_strdup(&args[0]); | |
1946 | if (!journal_path) { | |
1947 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1948 | "journal device string"); | |
1949 | return -1; | |
1950 | } | |
1951 | ||
1952 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1953 | if (error) { | |
1954 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1955 | "journal device path: error %d", error); | |
1956 | kfree(journal_path); | |
1957 | return -1; | |
1958 | } | |
1959 | ||
0dcf2745 SF |
1960 | /* |
1961 | * Refuse access for unprivileged mounts if the user does | |
1962 | * not have rw access to the journal device via the supplied | |
1963 | * path. | |
1964 | */ | |
1965 | if (!capable(CAP_SYS_ADMIN) && | |
1966 | inode_permission(d_inode(path.dentry), MAY_READ|MAY_WRITE)) { | |
1967 | ext4_msg(sb, KERN_ERR, | |
1968 | "error: Insufficient access to journal path %s", | |
1969 | journal_path); | |
1970 | return -1; | |
1971 | } | |
1972 | ||
2b0143b5 | 1973 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1974 | if (!S_ISBLK(journal_inode->i_mode)) { |
1975 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1976 | "is not a block device", journal_path); | |
1977 | path_put(&path); | |
1978 | kfree(journal_path); | |
1979 | return -1; | |
1980 | } | |
1981 | ||
1982 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1983 | path_put(&path); | |
1984 | kfree(journal_path); | |
5f3633e3 JK |
1985 | } else if (token == Opt_journal_ioprio) { |
1986 | if (arg > 7) { | |
1987 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1988 | " (must be 0-7)"); | |
1989 | return -1; | |
1990 | } | |
1991 | *journal_ioprio = | |
1992 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 | 1993 | } else if (token == Opt_test_dummy_encryption) { |
643fa961 | 1994 | #ifdef CONFIG_FS_ENCRYPTION |
6ddb2447 TT |
1995 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; |
1996 | ext4_msg(sb, KERN_WARNING, | |
1997 | "Test dummy encryption mode enabled"); | |
1998 | #else | |
1999 | ext4_msg(sb, KERN_WARNING, | |
2000 | "Test dummy encryption mount option ignored"); | |
2001 | #endif | |
5f3633e3 JK |
2002 | } else if (m->flags & MOPT_DATAJ) { |
2003 | if (is_remount) { | |
2004 | if (!sbi->s_journal) | |
2005 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
2006 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 2007 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 2008 | "Cannot change data mode on remount"); |
26092bf5 | 2009 | return -1; |
ac27a0ec | 2010 | } |
26092bf5 | 2011 | } else { |
5f3633e3 JK |
2012 | clear_opt(sb, DATA_FLAGS); |
2013 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 2014 | } |
5f3633e3 JK |
2015 | #ifdef CONFIG_QUOTA |
2016 | } else if (m->flags & MOPT_QFMT) { | |
2017 | if (sb_any_quota_loaded(sb) && | |
2018 | sbi->s_jquota_fmt != m->mount_opt) { | |
2019 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
2020 | "quota options when quota turned on"); | |
2021 | return -1; | |
2022 | } | |
e2b911c5 | 2023 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
2024 | ext4_msg(sb, KERN_INFO, |
2025 | "Quota format mount options ignored " | |
262b4662 | 2026 | "when QUOTA feature is enabled"); |
c325a67c | 2027 | return 1; |
262b4662 | 2028 | } |
5f3633e3 | 2029 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 2030 | #endif |
923ae0ff | 2031 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
2032 | #ifdef CONFIG_FS_DAX |
2033 | ext4_msg(sb, KERN_WARNING, | |
2034 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
a92abd73 | 2035 | sbi->s_mount_opt |= m->mount_opt; |
ef83b6e8 | 2036 | #else |
923ae0ff RZ |
2037 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
2038 | return -1; | |
5f3633e3 | 2039 | #endif |
7915a861 AN |
2040 | } else if (token == Opt_data_err_abort) { |
2041 | sbi->s_mount_opt |= m->mount_opt; | |
2042 | } else if (token == Opt_data_err_ignore) { | |
2043 | sbi->s_mount_opt &= ~m->mount_opt; | |
5f3633e3 JK |
2044 | } else { |
2045 | if (!args->from) | |
2046 | arg = 1; | |
2047 | if (m->flags & MOPT_CLEAR) | |
2048 | arg = !arg; | |
2049 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
2050 | ext4_msg(sb, KERN_WARNING, | |
2051 | "buggy handling of option %s", opt); | |
2052 | WARN_ON(1); | |
2053 | return -1; | |
2054 | } | |
2055 | if (arg != 0) | |
2056 | sbi->s_mount_opt |= m->mount_opt; | |
2057 | else | |
2058 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 2059 | } |
5f3633e3 | 2060 | return 1; |
26092bf5 TT |
2061 | } |
2062 | ||
2063 | static int parse_options(char *options, struct super_block *sb, | |
2064 | unsigned long *journal_devnum, | |
2065 | unsigned int *journal_ioprio, | |
2066 | int is_remount) | |
2067 | { | |
2068 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
33458eab | 2069 | char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name; |
26092bf5 TT |
2070 | substring_t args[MAX_OPT_ARGS]; |
2071 | int token; | |
2072 | ||
2073 | if (!options) | |
2074 | return 1; | |
2075 | ||
2076 | while ((p = strsep(&options, ",")) != NULL) { | |
2077 | if (!*p) | |
2078 | continue; | |
2079 | /* | |
2080 | * Initialize args struct so we know whether arg was | |
2081 | * found; some options take optional arguments. | |
2082 | */ | |
caecd0af | 2083 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
2084 | token = match_token(p, tokens, args); |
2085 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
2086 | journal_ioprio, is_remount) < 0) | |
2087 | return 0; | |
ac27a0ec DK |
2088 | } |
2089 | #ifdef CONFIG_QUOTA | |
49da9392 JK |
2090 | /* |
2091 | * We do the test below only for project quotas. 'usrquota' and | |
2092 | * 'grpquota' mount options are allowed even without quota feature | |
2093 | * to support legacy quotas in quota files. | |
2094 | */ | |
2095 | if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { | |
2096 | ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " | |
2097 | "Cannot enable project quota enforcement."); | |
2098 | return 0; | |
2099 | } | |
33458eab TT |
2100 | usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); |
2101 | grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); | |
2102 | if (usr_qf_name || grp_qf_name) { | |
2103 | if (test_opt(sb, USRQUOTA) && usr_qf_name) | |
fd8c37ec | 2104 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 2105 | |
33458eab | 2106 | if (test_opt(sb, GRPQUOTA) && grp_qf_name) |
fd8c37ec | 2107 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 2108 | |
56c50f11 | 2109 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
2110 | ext4_msg(sb, KERN_ERR, "old and new quota " |
2111 | "format mixing"); | |
ac27a0ec DK |
2112 | return 0; |
2113 | } | |
2114 | ||
2115 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
2116 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2117 | "not specified"); | |
ac27a0ec DK |
2118 | return 0; |
2119 | } | |
ac27a0ec DK |
2120 | } |
2121 | #endif | |
261cb20c JK |
2122 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
2123 | int blocksize = | |
2124 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
2125 | ||
09cbfeaf | 2126 | if (blocksize < PAGE_SIZE) { |
261cb20c JK |
2127 | ext4_msg(sb, KERN_ERR, "can't mount with " |
2128 | "dioread_nolock if block size != PAGE_SIZE"); | |
2129 | return 0; | |
2130 | } | |
2131 | } | |
ac27a0ec DK |
2132 | return 1; |
2133 | } | |
2134 | ||
2adf6da8 TT |
2135 | static inline void ext4_show_quota_options(struct seq_file *seq, |
2136 | struct super_block *sb) | |
2137 | { | |
2138 | #if defined(CONFIG_QUOTA) | |
2139 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
33458eab | 2140 | char *usr_qf_name, *grp_qf_name; |
2adf6da8 TT |
2141 | |
2142 | if (sbi->s_jquota_fmt) { | |
2143 | char *fmtname = ""; | |
2144 | ||
2145 | switch (sbi->s_jquota_fmt) { | |
2146 | case QFMT_VFS_OLD: | |
2147 | fmtname = "vfsold"; | |
2148 | break; | |
2149 | case QFMT_VFS_V0: | |
2150 | fmtname = "vfsv0"; | |
2151 | break; | |
2152 | case QFMT_VFS_V1: | |
2153 | fmtname = "vfsv1"; | |
2154 | break; | |
2155 | } | |
2156 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
2157 | } | |
2158 | ||
33458eab TT |
2159 | rcu_read_lock(); |
2160 | usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); | |
2161 | grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); | |
2162 | if (usr_qf_name) | |
2163 | seq_show_option(seq, "usrjquota", usr_qf_name); | |
2164 | if (grp_qf_name) | |
2165 | seq_show_option(seq, "grpjquota", grp_qf_name); | |
2166 | rcu_read_unlock(); | |
2adf6da8 TT |
2167 | #endif |
2168 | } | |
2169 | ||
5a916be1 TT |
2170 | static const char *token2str(int token) |
2171 | { | |
50df9fd5 | 2172 | const struct match_token *t; |
5a916be1 TT |
2173 | |
2174 | for (t = tokens; t->token != Opt_err; t++) | |
2175 | if (t->token == token && !strchr(t->pattern, '=')) | |
2176 | break; | |
2177 | return t->pattern; | |
2178 | } | |
2179 | ||
2adf6da8 TT |
2180 | /* |
2181 | * Show an option if | |
2182 | * - it's set to a non-default value OR | |
2183 | * - if the per-sb default is different from the global default | |
2184 | */ | |
66acdcf4 TT |
2185 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
2186 | int nodefs) | |
2adf6da8 | 2187 | { |
2adf6da8 TT |
2188 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2189 | struct ext4_super_block *es = sbi->s_es; | |
68afa7e0 | 2190 | int def_errors, def_mount_opt = sbi->s_def_mount_opt; |
5a916be1 | 2191 | const struct mount_opts *m; |
66acdcf4 | 2192 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 2193 | |
66acdcf4 TT |
2194 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
2195 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
2196 | |
2197 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
2198 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
2199 | ||
2200 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
2201 | int want_set = m->flags & MOPT_SET; | |
2202 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
2203 | (m->flags & MOPT_CLEAR_ERR)) | |
2204 | continue; | |
68afa7e0 | 2205 | if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
2206 | continue; /* skip if same as the default */ |
2207 | if ((want_set && | |
2208 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
2209 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
2210 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
2211 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 2212 | } |
5a916be1 | 2213 | |
0dcf2745 | 2214 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(sb->s_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 2215 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a | 2216 | SEQ_OPTS_PRINT("resuid=%u", |
0dcf2745 SF |
2217 | from_kuid_munged(sb->s_user_ns, sbi->s_resuid)); |
2218 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(sb->s_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 2219 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a | 2220 | SEQ_OPTS_PRINT("resgid=%u", |
0dcf2745 | 2221 | from_kgid_munged(sb->s_user_ns, sbi->s_resgid)); |
66acdcf4 | 2222 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
2223 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
2224 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 2225 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 2226 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 2227 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 2228 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 2229 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 2230 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 2231 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 2232 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 2233 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 2234 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
357fdad0 | 2235 | if (sb->s_flags & SB_I_VERSION) |
5a916be1 | 2236 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 2237 | if (nodefs || sbi->s_stripe) |
5a916be1 | 2238 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
68afa7e0 TN |
2239 | if (nodefs || EXT4_MOUNT_DATA_FLAGS & |
2240 | (sbi->s_mount_opt ^ def_mount_opt)) { | |
5a916be1 TT |
2241 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
2242 | SEQ_OPTS_PUTS("data=journal"); | |
2243 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2244 | SEQ_OPTS_PUTS("data=ordered"); | |
2245 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
2246 | SEQ_OPTS_PUTS("data=writeback"); | |
2247 | } | |
66acdcf4 TT |
2248 | if (nodefs || |
2249 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
2250 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
2251 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 2252 | |
ceec0376 | 2253 | if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || |
66acdcf4 | 2254 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) |
5a916be1 | 2255 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
2256 | if (nodefs || sbi->s_max_dir_size_kb) |
2257 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
7915a861 AN |
2258 | if (test_opt(sb, DATA_ERR_ABORT)) |
2259 | SEQ_OPTS_PUTS("data_err=abort"); | |
338affb5 EB |
2260 | if (DUMMY_ENCRYPTION_ENABLED(sbi)) |
2261 | SEQ_OPTS_PUTS("test_dummy_encryption"); | |
2adf6da8 TT |
2262 | |
2263 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
2264 | return 0; |
2265 | } | |
2266 | ||
66acdcf4 TT |
2267 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
2268 | { | |
2269 | return _ext4_show_options(seq, root->d_sb, 0); | |
2270 | } | |
2271 | ||
ebd173be | 2272 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
2273 | { |
2274 | struct super_block *sb = seq->private; | |
2275 | int rc; | |
2276 | ||
bc98a42c | 2277 | seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); |
66acdcf4 TT |
2278 | rc = _ext4_show_options(seq, sb, 1); |
2279 | seq_puts(seq, "\n"); | |
2280 | return rc; | |
2281 | } | |
2282 | ||
617ba13b | 2283 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
2284 | int read_only) |
2285 | { | |
617ba13b | 2286 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
c89128a0 | 2287 | int err = 0; |
ac27a0ec | 2288 | |
617ba13b | 2289 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
2290 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
2291 | "forcing read-only mode"); | |
c89128a0 | 2292 | err = -EROFS; |
ac27a0ec DK |
2293 | } |
2294 | if (read_only) | |
281b5995 | 2295 | goto done; |
617ba13b | 2296 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
2297 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
2298 | "running e2fsck is recommended"); | |
c8b459f4 | 2299 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
2300 | ext4_msg(sb, KERN_WARNING, |
2301 | "warning: mounting fs with errors, " | |
2302 | "running e2fsck is recommended"); | |
ed3ce80a | 2303 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
2304 | le16_to_cpu(es->s_mnt_count) >= |
2305 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
2306 | ext4_msg(sb, KERN_WARNING, |
2307 | "warning: maximal mount count reached, " | |
2308 | "running e2fsck is recommended"); | |
ac27a0ec | 2309 | else if (le32_to_cpu(es->s_checkinterval) && |
6a0678a7 AB |
2310 | (ext4_get_tstamp(es, s_lastcheck) + |
2311 | le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) | |
b31e1552 ES |
2312 | ext4_msg(sb, KERN_WARNING, |
2313 | "warning: checktime reached, " | |
2314 | "running e2fsck is recommended"); | |
0b8e58a1 | 2315 | if (!sbi->s_journal) |
0390131b | 2316 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 2317 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 2318 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 2319 | le16_add_cpu(&es->s_mnt_count, 1); |
6a0678a7 | 2320 | ext4_update_tstamp(es, s_mtime); |
0390131b | 2321 | if (sbi->s_journal) |
e2b911c5 | 2322 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 2323 | |
c89128a0 | 2324 | err = ext4_commit_super(sb, 1); |
281b5995 | 2325 | done: |
ac27a0ec | 2326 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 2327 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 2328 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
2329 | sb->s_blocksize, |
2330 | sbi->s_groups_count, | |
617ba13b MC |
2331 | EXT4_BLOCKS_PER_GROUP(sb), |
2332 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 2333 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 2334 | |
7abc52c2 | 2335 | cleancache_init_fs(sb); |
c89128a0 | 2336 | return err; |
ac27a0ec DK |
2337 | } |
2338 | ||
117fff10 TT |
2339 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
2340 | { | |
2341 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2342 | struct flex_groups *new_groups; | |
2343 | int size; | |
2344 | ||
2345 | if (!sbi->s_log_groups_per_flex) | |
2346 | return 0; | |
2347 | ||
2348 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2349 | if (size <= sbi->s_flex_groups_allocated) | |
2350 | return 0; | |
2351 | ||
2352 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
a7c3e901 | 2353 | new_groups = kvzalloc(size, GFP_KERNEL); |
117fff10 TT |
2354 | if (!new_groups) { |
2355 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2356 | size / (int) sizeof(struct flex_groups)); | |
2357 | return -ENOMEM; | |
2358 | } | |
2359 | ||
2360 | if (sbi->s_flex_groups) { | |
2361 | memcpy(new_groups, sbi->s_flex_groups, | |
2362 | (sbi->s_flex_groups_allocated * | |
2363 | sizeof(struct flex_groups))); | |
b93b41d4 | 2364 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2365 | } |
2366 | sbi->s_flex_groups = new_groups; | |
2367 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2368 | return 0; | |
2369 | } | |
2370 | ||
772cb7c8 JS |
2371 | static int ext4_fill_flex_info(struct super_block *sb) |
2372 | { | |
2373 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2374 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2375 | ext4_group_t flex_group; |
117fff10 | 2376 | int i, err; |
772cb7c8 | 2377 | |
503358ae | 2378 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2379 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2380 | sbi->s_log_groups_per_flex = 0; |
2381 | return 1; | |
2382 | } | |
2383 | ||
117fff10 TT |
2384 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2385 | if (err) | |
9933fc0a | 2386 | goto failed; |
772cb7c8 | 2387 | |
772cb7c8 | 2388 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2389 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2390 | |
2391 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2392 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2393 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2394 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2395 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2396 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2397 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2398 | } |
2399 | ||
2400 | return 1; | |
2401 | failed: | |
2402 | return 0; | |
2403 | } | |
2404 | ||
e2b911c5 | 2405 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2406 | struct ext4_group_desc *gdp) |
717d50e4 | 2407 | { |
b47820ed | 2408 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
717d50e4 | 2409 | __u16 crc = 0; |
feb0ab32 | 2410 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2411 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2412 | |
9aa5d32b | 2413 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2414 | /* Use new metadata_csum algorithm */ |
feb0ab32 | 2415 | __u32 csum32; |
b47820ed | 2416 | __u16 dummy_csum = 0; |
feb0ab32 | 2417 | |
feb0ab32 DW |
2418 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
2419 | sizeof(le_group)); | |
b47820ed DJ |
2420 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
2421 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, | |
2422 | sizeof(dummy_csum)); | |
2423 | offset += sizeof(dummy_csum); | |
2424 | if (offset < sbi->s_desc_size) | |
2425 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, | |
2426 | sbi->s_desc_size - offset); | |
feb0ab32 DW |
2427 | |
2428 | crc = csum32 & 0xFFFF; | |
2429 | goto out; | |
717d50e4 AD |
2430 | } |
2431 | ||
feb0ab32 | 2432 | /* old crc16 code */ |
e2b911c5 | 2433 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2434 | return 0; |
2435 | ||
feb0ab32 DW |
2436 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
2437 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2438 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2439 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2440 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2441 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2442 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2443 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2444 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2445 | offset); | |
2446 | ||
2447 | out: | |
717d50e4 AD |
2448 | return cpu_to_le16(crc); |
2449 | } | |
2450 | ||
feb0ab32 | 2451 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2452 | struct ext4_group_desc *gdp) |
2453 | { | |
feb0ab32 | 2454 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2455 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2456 | return 0; |
2457 | ||
2458 | return 1; | |
2459 | } | |
2460 | ||
feb0ab32 DW |
2461 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2462 | struct ext4_group_desc *gdp) | |
2463 | { | |
2464 | if (!ext4_has_group_desc_csum(sb)) | |
2465 | return; | |
e2b911c5 | 2466 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2467 | } |
2468 | ||
ac27a0ec | 2469 | /* Called at mount-time, super-block is locked */ |
bfff6873 | 2470 | static int ext4_check_descriptors(struct super_block *sb, |
829fa70d | 2471 | ext4_fsblk_t sb_block, |
bfff6873 | 2472 | ext4_group_t *first_not_zeroed) |
ac27a0ec | 2473 | { |
617ba13b MC |
2474 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2475 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2476 | ext4_fsblk_t last_block; | |
44de022c | 2477 | ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); |
bd81d8ee LV |
2478 | ext4_fsblk_t block_bitmap; |
2479 | ext4_fsblk_t inode_bitmap; | |
2480 | ext4_fsblk_t inode_table; | |
ce421581 | 2481 | int flexbg_flag = 0; |
bfff6873 | 2482 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2483 | |
e2b911c5 | 2484 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2485 | flexbg_flag = 1; |
2486 | ||
af5bc92d | 2487 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2488 | |
197cd65a AM |
2489 | for (i = 0; i < sbi->s_groups_count; i++) { |
2490 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2491 | ||
ce421581 | 2492 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2493 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2494 | else |
2495 | last_block = first_block + | |
617ba13b | 2496 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2497 | |
bfff6873 LC |
2498 | if ((grp == sbi->s_groups_count) && |
2499 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2500 | grp = i; | |
2501 | ||
8fadc143 | 2502 | block_bitmap = ext4_block_bitmap(sb, gdp); |
829fa70d TT |
2503 | if (block_bitmap == sb_block) { |
2504 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2505 | "Block bitmap for group %u overlaps " | |
2506 | "superblock", i); | |
18db4b4e TT |
2507 | if (!sb_rdonly(sb)) |
2508 | return 0; | |
829fa70d | 2509 | } |
77260807 TT |
2510 | if (block_bitmap >= sb_block + 1 && |
2511 | block_bitmap <= last_bg_block) { | |
2512 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2513 | "Block bitmap for group %u overlaps " | |
2514 | "block group descriptors", i); | |
2515 | if (!sb_rdonly(sb)) | |
2516 | return 0; | |
2517 | } | |
2b2d6d01 | 2518 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2519 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2520 | "Block bitmap for group %u not in group " |
b31e1552 | 2521 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2522 | return 0; |
2523 | } | |
8fadc143 | 2524 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
829fa70d TT |
2525 | if (inode_bitmap == sb_block) { |
2526 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2527 | "Inode bitmap for group %u overlaps " | |
2528 | "superblock", i); | |
18db4b4e TT |
2529 | if (!sb_rdonly(sb)) |
2530 | return 0; | |
829fa70d | 2531 | } |
77260807 TT |
2532 | if (inode_bitmap >= sb_block + 1 && |
2533 | inode_bitmap <= last_bg_block) { | |
2534 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2535 | "Inode bitmap for group %u overlaps " | |
2536 | "block group descriptors", i); | |
2537 | if (!sb_rdonly(sb)) | |
2538 | return 0; | |
2539 | } | |
2b2d6d01 | 2540 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2541 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2542 | "Inode bitmap for group %u not in group " |
b31e1552 | 2543 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2544 | return 0; |
2545 | } | |
8fadc143 | 2546 | inode_table = ext4_inode_table(sb, gdp); |
829fa70d TT |
2547 | if (inode_table == sb_block) { |
2548 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2549 | "Inode table for group %u overlaps " | |
2550 | "superblock", i); | |
18db4b4e TT |
2551 | if (!sb_rdonly(sb)) |
2552 | return 0; | |
829fa70d | 2553 | } |
77260807 TT |
2554 | if (inode_table >= sb_block + 1 && |
2555 | inode_table <= last_bg_block) { | |
2556 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2557 | "Inode table for group %u overlaps " | |
2558 | "block group descriptors", i); | |
2559 | if (!sb_rdonly(sb)) | |
2560 | return 0; | |
2561 | } | |
bd81d8ee | 2562 | if (inode_table < first_block || |
2b2d6d01 | 2563 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2564 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2565 | "Inode table for group %u not in group " |
b31e1552 | 2566 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2567 | return 0; |
2568 | } | |
955ce5f5 | 2569 | ext4_lock_group(sb, i); |
feb0ab32 | 2570 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2571 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2572 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2573 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2574 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
bc98a42c | 2575 | if (!sb_rdonly(sb)) { |
955ce5f5 | 2576 | ext4_unlock_group(sb, i); |
8a266467 | 2577 | return 0; |
7ee1ec4c | 2578 | } |
717d50e4 | 2579 | } |
955ce5f5 | 2580 | ext4_unlock_group(sb, i); |
ce421581 JS |
2581 | if (!flexbg_flag) |
2582 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2583 | } |
bfff6873 LC |
2584 | if (NULL != first_not_zeroed) |
2585 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2586 | return 1; |
2587 | } | |
2588 | ||
617ba13b | 2589 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2590 | * the superblock) which were deleted from all directories, but held open by |
2591 | * a process at the time of a crash. We walk the list and try to delete these | |
2592 | * inodes at recovery time (only with a read-write filesystem). | |
2593 | * | |
2594 | * In order to keep the orphan inode chain consistent during traversal (in | |
2595 | * case of crash during recovery), we link each inode into the superblock | |
2596 | * orphan list_head and handle it the same way as an inode deletion during | |
2597 | * normal operation (which journals the operations for us). | |
2598 | * | |
2599 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2600 | * accidentally point at an in-use or already deleted inode. The worst that | |
2601 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2602 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2603 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2604 | * inode cleanup for us, so we can safely abort without any further action. | |
2605 | */ | |
2b2d6d01 TT |
2606 | static void ext4_orphan_cleanup(struct super_block *sb, |
2607 | struct ext4_super_block *es) | |
ac27a0ec DK |
2608 | { |
2609 | unsigned int s_flags = sb->s_flags; | |
2c98eb5e | 2610 | int ret, nr_orphans = 0, nr_truncates = 0; |
ac27a0ec | 2611 | #ifdef CONFIG_QUOTA |
95f1fda4 | 2612 | int quota_update = 0; |
ac27a0ec DK |
2613 | int i; |
2614 | #endif | |
2615 | if (!es->s_last_orphan) { | |
2616 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2617 | return; | |
2618 | } | |
2619 | ||
a8f48a95 | 2620 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2621 | ext4_msg(sb, KERN_ERR, "write access " |
2622 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2623 | return; |
2624 | } | |
2625 | ||
d39195c3 AG |
2626 | /* Check if feature set would not allow a r/w mount */ |
2627 | if (!ext4_feature_set_ok(sb, 0)) { | |
2628 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2629 | "unknown ROCOMPAT features"); | |
2630 | return; | |
2631 | } | |
2632 | ||
617ba13b | 2633 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 | 2634 | /* don't clear list on RO mount w/ errors */ |
1751e8a6 | 2635 | if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { |
84474976 | 2636 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2637 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2638 | es->s_last_orphan = 0; |
2639 | } | |
ac27a0ec DK |
2640 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2641 | return; | |
2642 | } | |
2643 | ||
1751e8a6 | 2644 | if (s_flags & SB_RDONLY) { |
b31e1552 | 2645 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
1751e8a6 | 2646 | sb->s_flags &= ~SB_RDONLY; |
ac27a0ec DK |
2647 | } |
2648 | #ifdef CONFIG_QUOTA | |
2649 | /* Needed for iput() to work correctly and not trash data */ | |
1751e8a6 | 2650 | sb->s_flags |= SB_ACTIVE; |
95f1fda4 | 2651 | |
2652 | /* | |
2653 | * Turn on quotas which were not enabled for read-only mounts if | |
2654 | * filesystem has quota feature, so that they are updated correctly. | |
2655 | */ | |
1751e8a6 | 2656 | if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { |
95f1fda4 | 2657 | int ret = ext4_enable_quotas(sb); |
2658 | ||
2659 | if (!ret) | |
2660 | quota_update = 1; | |
2661 | else | |
2662 | ext4_msg(sb, KERN_ERR, | |
2663 | "Cannot turn on quotas: error %d", ret); | |
2664 | } | |
2665 | ||
2666 | /* Turn on journaled quotas used for old sytle */ | |
a2d4a646 | 2667 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2668 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2669 | int ret = ext4_quota_on_mount(sb, i); | |
95f1fda4 | 2670 | |
2671 | if (!ret) | |
2672 | quota_update = 1; | |
2673 | else | |
b31e1552 ES |
2674 | ext4_msg(sb, KERN_ERR, |
2675 | "Cannot turn on journaled " | |
95f1fda4 | 2676 | "quota: type %d: error %d", i, ret); |
ac27a0ec DK |
2677 | } |
2678 | } | |
2679 | #endif | |
2680 | ||
2681 | while (es->s_last_orphan) { | |
2682 | struct inode *inode; | |
2683 | ||
c65d5c6c VN |
2684 | /* |
2685 | * We may have encountered an error during cleanup; if | |
2686 | * so, skip the rest. | |
2687 | */ | |
2688 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { | |
2689 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2690 | es->s_last_orphan = 0; | |
2691 | break; | |
2692 | } | |
2693 | ||
97bd42b9 JB |
2694 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2695 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2696 | es->s_last_orphan = 0; |
2697 | break; | |
2698 | } | |
2699 | ||
617ba13b | 2700 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2701 | dquot_initialize(inode); |
ac27a0ec | 2702 | if (inode->i_nlink) { |
566370a2 PT |
2703 | if (test_opt(sb, DEBUG)) |
2704 | ext4_msg(sb, KERN_DEBUG, | |
2705 | "%s: truncating inode %lu to %lld bytes", | |
2706 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2707 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2708 | inode->i_ino, inode->i_size); |
5955102c | 2709 | inode_lock(inode); |
55f252c9 | 2710 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
2c98eb5e TT |
2711 | ret = ext4_truncate(inode); |
2712 | if (ret) | |
2713 | ext4_std_error(inode->i_sb, ret); | |
5955102c | 2714 | inode_unlock(inode); |
ac27a0ec DK |
2715 | nr_truncates++; |
2716 | } else { | |
566370a2 PT |
2717 | if (test_opt(sb, DEBUG)) |
2718 | ext4_msg(sb, KERN_DEBUG, | |
2719 | "%s: deleting unreferenced inode %lu", | |
2720 | __func__, inode->i_ino); | |
ac27a0ec DK |
2721 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2722 | inode->i_ino); | |
2723 | nr_orphans++; | |
2724 | } | |
2725 | iput(inode); /* The delete magic happens here! */ | |
2726 | } | |
2727 | ||
2b2d6d01 | 2728 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2729 | |
2730 | if (nr_orphans) | |
b31e1552 ES |
2731 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2732 | PLURAL(nr_orphans)); | |
ac27a0ec | 2733 | if (nr_truncates) |
b31e1552 ES |
2734 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2735 | PLURAL(nr_truncates)); | |
ac27a0ec | 2736 | #ifdef CONFIG_QUOTA |
95f1fda4 | 2737 | /* Turn off quotas if they were enabled for orphan cleanup */ |
2738 | if (quota_update) { | |
2739 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { | |
2740 | if (sb_dqopt(sb)->files[i]) | |
2741 | dquot_quota_off(sb, i); | |
2742 | } | |
ac27a0ec DK |
2743 | } |
2744 | #endif | |
1751e8a6 | 2745 | sb->s_flags = s_flags; /* Restore SB_RDONLY status */ |
ac27a0ec | 2746 | } |
0b8e58a1 | 2747 | |
cd2291a4 ES |
2748 | /* |
2749 | * Maximal extent format file size. | |
2750 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2751 | * extent format containers, within a sector_t, and within i_blocks | |
2752 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2753 | * so that won't be a limiting factor. | |
2754 | * | |
f17722f9 LC |
2755 | * However there is other limiting factor. We do store extents in the form |
2756 | * of starting block and length, hence the resulting length of the extent | |
2757 | * covering maximum file size must fit into on-disk format containers as | |
2758 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2759 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2760 | * | |
cd2291a4 ES |
2761 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2762 | */ | |
f287a1a5 | 2763 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2764 | { |
2765 | loff_t res; | |
2766 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2767 | ||
72deb455 CH |
2768 | BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); |
2769 | ||
2770 | if (!has_huge_files) { | |
cd2291a4 ES |
2771 | upper_limit = (1LL << 32) - 1; |
2772 | ||
2773 | /* total blocks in file system block size */ | |
2774 | upper_limit >>= (blkbits - 9); | |
2775 | upper_limit <<= blkbits; | |
2776 | } | |
2777 | ||
f17722f9 LC |
2778 | /* |
2779 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2780 | * by one fs block, so ee_len can cover the extent of maximum file | |
2781 | * size | |
2782 | */ | |
2783 | res = (1LL << 32) - 1; | |
cd2291a4 | 2784 | res <<= blkbits; |
cd2291a4 ES |
2785 | |
2786 | /* Sanity check against vm- & vfs- imposed limits */ | |
2787 | if (res > upper_limit) | |
2788 | res = upper_limit; | |
2789 | ||
2790 | return res; | |
2791 | } | |
ac27a0ec | 2792 | |
ac27a0ec | 2793 | /* |
cd2291a4 | 2794 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2795 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2796 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2797 | */ |
f287a1a5 | 2798 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2799 | { |
617ba13b | 2800 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2801 | int meta_blocks; |
2802 | loff_t upper_limit; | |
0b8e58a1 AD |
2803 | /* This is calculated to be the largest file size for a dense, block |
2804 | * mapped file such that the file's total number of 512-byte sectors, | |
2805 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2806 | * | |
2807 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2808 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2809 | */ |
2810 | ||
72deb455 | 2811 | if (!has_huge_files) { |
0fc1b451 | 2812 | /* |
72deb455 CH |
2813 | * !has_huge_files or implies that the inode i_block field |
2814 | * represents total file blocks in 2^32 512-byte sectors == | |
2815 | * size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2816 | */ |
2817 | upper_limit = (1LL << 32) - 1; | |
2818 | ||
2819 | /* total blocks in file system block size */ | |
2820 | upper_limit >>= (bits - 9); | |
2821 | ||
2822 | } else { | |
8180a562 AK |
2823 | /* |
2824 | * We use 48 bit ext4_inode i_blocks | |
2825 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2826 | * represent total number of blocks in | |
2827 | * file system block size | |
2828 | */ | |
0fc1b451 AK |
2829 | upper_limit = (1LL << 48) - 1; |
2830 | ||
0fc1b451 AK |
2831 | } |
2832 | ||
2833 | /* indirect blocks */ | |
2834 | meta_blocks = 1; | |
2835 | /* double indirect blocks */ | |
2836 | meta_blocks += 1 + (1LL << (bits-2)); | |
2837 | /* tripple indirect blocks */ | |
2838 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2839 | ||
2840 | upper_limit -= meta_blocks; | |
2841 | upper_limit <<= bits; | |
ac27a0ec DK |
2842 | |
2843 | res += 1LL << (bits-2); | |
2844 | res += 1LL << (2*(bits-2)); | |
2845 | res += 1LL << (3*(bits-2)); | |
2846 | res <<= bits; | |
2847 | if (res > upper_limit) | |
2848 | res = upper_limit; | |
0fc1b451 AK |
2849 | |
2850 | if (res > MAX_LFS_FILESIZE) | |
2851 | res = MAX_LFS_FILESIZE; | |
2852 | ||
ac27a0ec DK |
2853 | return res; |
2854 | } | |
2855 | ||
617ba13b | 2856 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2857 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2858 | { |
617ba13b | 2859 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2860 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2861 | int has_super = 0; |
2862 | ||
2863 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2864 | ||
e2b911c5 | 2865 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2866 | return logical_sb_block + nr + 1; |
ac27a0ec | 2867 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2868 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2869 | has_super = 1; |
0b8e58a1 | 2870 | |
bd63f6b0 DW |
2871 | /* |
2872 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2873 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2874 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2875 | * compensate. | |
2876 | */ | |
2877 | if (sb->s_blocksize == 1024 && nr == 0 && | |
49598e04 | 2878 | le32_to_cpu(sbi->s_es->s_first_data_block) == 0) |
bd63f6b0 DW |
2879 | has_super++; |
2880 | ||
617ba13b | 2881 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2882 | } |
2883 | ||
c9de560d AT |
2884 | /** |
2885 | * ext4_get_stripe_size: Get the stripe size. | |
2886 | * @sbi: In memory super block info | |
2887 | * | |
2888 | * If we have specified it via mount option, then | |
2889 | * use the mount option value. If the value specified at mount time is | |
2890 | * greater than the blocks per group use the super block value. | |
2891 | * If the super block value is greater than blocks per group return 0. | |
2892 | * Allocator needs it be less than blocks per group. | |
2893 | * | |
2894 | */ | |
2895 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2896 | { | |
2897 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2898 | unsigned long stripe_width = | |
2899 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2900 | int ret; |
c9de560d AT |
2901 | |
2902 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 | 2903 | ret = sbi->s_stripe; |
5469d7c3 | 2904 | else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) |
3eb08658 | 2905 | ret = stripe_width; |
5469d7c3 | 2906 | else if (stride && stride <= sbi->s_blocks_per_group) |
3eb08658 DE |
2907 | ret = stride; |
2908 | else | |
2909 | ret = 0; | |
c9de560d | 2910 | |
3eb08658 DE |
2911 | /* |
2912 | * If the stripe width is 1, this makes no sense and | |
2913 | * we set it to 0 to turn off stripe handling code. | |
2914 | */ | |
2915 | if (ret <= 1) | |
2916 | ret = 0; | |
c9de560d | 2917 | |
3eb08658 | 2918 | return ret; |
c9de560d | 2919 | } |
ac27a0ec | 2920 | |
a13fb1a4 ES |
2921 | /* |
2922 | * Check whether this filesystem can be mounted based on | |
2923 | * the features present and the RDONLY/RDWR mount requested. | |
2924 | * Returns 1 if this filesystem can be mounted as requested, | |
2925 | * 0 if it cannot be. | |
2926 | */ | |
2927 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2928 | { | |
e2b911c5 | 2929 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2930 | ext4_msg(sb, KERN_ERR, |
2931 | "Couldn't mount because of " | |
2932 | "unsupported optional features (%x)", | |
2933 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2934 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2935 | return 0; | |
2936 | } | |
2937 | ||
c83ad55e GKB |
2938 | #ifndef CONFIG_UNICODE |
2939 | if (ext4_has_feature_casefold(sb)) { | |
2940 | ext4_msg(sb, KERN_ERR, | |
2941 | "Filesystem with casefold feature cannot be " | |
2942 | "mounted without CONFIG_UNICODE"); | |
2943 | return 0; | |
2944 | } | |
2945 | #endif | |
2946 | ||
a13fb1a4 ES |
2947 | if (readonly) |
2948 | return 1; | |
2949 | ||
e2b911c5 | 2950 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b | 2951 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
1751e8a6 | 2952 | sb->s_flags |= SB_RDONLY; |
2cb5cc8b DW |
2953 | return 1; |
2954 | } | |
2955 | ||
a13fb1a4 | 2956 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2957 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2958 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2959 | "unsupported optional features (%x)", | |
2960 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2961 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2962 | return 0; | |
2963 | } | |
e2b911c5 | 2964 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2965 | ext4_msg(sb, KERN_ERR, |
2966 | "Can't support bigalloc feature without " | |
2967 | "extents feature\n"); | |
2968 | return 0; | |
2969 | } | |
7c319d32 AK |
2970 | |
2971 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2972 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2973 | ext4_msg(sb, KERN_ERR, |
2974 | "Filesystem with quota feature cannot be mounted RDWR " | |
2975 | "without CONFIG_QUOTA"); | |
2976 | return 0; | |
2977 | } | |
689c958c LX |
2978 | if (ext4_has_feature_project(sb) && !readonly) { |
2979 | ext4_msg(sb, KERN_ERR, | |
2980 | "Filesystem with project quota feature cannot be mounted RDWR " | |
2981 | "without CONFIG_QUOTA"); | |
2982 | return 0; | |
2983 | } | |
7c319d32 | 2984 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
2985 | return 1; |
2986 | } | |
2987 | ||
66e61a9e TT |
2988 | /* |
2989 | * This function is called once a day if we have errors logged | |
2990 | * on the file system | |
2991 | */ | |
235699a8 | 2992 | static void print_daily_error_info(struct timer_list *t) |
66e61a9e | 2993 | { |
235699a8 KC |
2994 | struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); |
2995 | struct super_block *sb = sbi->s_sb; | |
2996 | struct ext4_super_block *es = sbi->s_es; | |
66e61a9e TT |
2997 | |
2998 | if (es->s_error_count) | |
ae0f78de TT |
2999 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
3000 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
3001 | le32_to_cpu(es->s_error_count)); |
3002 | if (es->s_first_error_time) { | |
6a0678a7 AB |
3003 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", |
3004 | sb->s_id, | |
3005 | ext4_get_tstamp(es, s_first_error_time), | |
66e61a9e TT |
3006 | (int) sizeof(es->s_first_error_func), |
3007 | es->s_first_error_func, | |
3008 | le32_to_cpu(es->s_first_error_line)); | |
3009 | if (es->s_first_error_ino) | |
651e1c3b | 3010 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
3011 | le32_to_cpu(es->s_first_error_ino)); |
3012 | if (es->s_first_error_block) | |
651e1c3b | 3013 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 3014 | le64_to_cpu(es->s_first_error_block)); |
651e1c3b | 3015 | printk(KERN_CONT "\n"); |
66e61a9e TT |
3016 | } |
3017 | if (es->s_last_error_time) { | |
6a0678a7 AB |
3018 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", |
3019 | sb->s_id, | |
3020 | ext4_get_tstamp(es, s_last_error_time), | |
66e61a9e TT |
3021 | (int) sizeof(es->s_last_error_func), |
3022 | es->s_last_error_func, | |
3023 | le32_to_cpu(es->s_last_error_line)); | |
3024 | if (es->s_last_error_ino) | |
651e1c3b | 3025 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
3026 | le32_to_cpu(es->s_last_error_ino)); |
3027 | if (es->s_last_error_block) | |
651e1c3b | 3028 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 3029 | le64_to_cpu(es->s_last_error_block)); |
651e1c3b | 3030 | printk(KERN_CONT "\n"); |
66e61a9e TT |
3031 | } |
3032 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
3033 | } | |
3034 | ||
bfff6873 LC |
3035 | /* Find next suitable group and run ext4_init_inode_table */ |
3036 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
3037 | { | |
3038 | struct ext4_group_desc *gdp = NULL; | |
3039 | ext4_group_t group, ngroups; | |
3040 | struct super_block *sb; | |
3041 | unsigned long timeout = 0; | |
3042 | int ret = 0; | |
3043 | ||
3044 | sb = elr->lr_super; | |
3045 | ngroups = EXT4_SB(sb)->s_groups_count; | |
3046 | ||
3047 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
3048 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3049 | if (!gdp) { | |
3050 | ret = 1; | |
3051 | break; | |
3052 | } | |
3053 | ||
3054 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3055 | break; | |
3056 | } | |
3057 | ||
7f511862 | 3058 | if (group >= ngroups) |
bfff6873 LC |
3059 | ret = 1; |
3060 | ||
3061 | if (!ret) { | |
3062 | timeout = jiffies; | |
3063 | ret = ext4_init_inode_table(sb, group, | |
3064 | elr->lr_timeout ? 0 : 1); | |
3065 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
3066 | timeout = (jiffies - timeout) * |
3067 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
3068 | elr->lr_timeout = timeout; |
3069 | } | |
3070 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
3071 | elr->lr_next_group = group + 1; | |
3072 | } | |
bfff6873 LC |
3073 | return ret; |
3074 | } | |
3075 | ||
3076 | /* | |
3077 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 3078 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
3079 | */ |
3080 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
3081 | { | |
3082 | struct ext4_sb_info *sbi; | |
3083 | ||
3084 | if (!elr) | |
3085 | return; | |
3086 | ||
3087 | sbi = elr->lr_sbi; | |
3088 | ||
3089 | list_del(&elr->lr_request); | |
3090 | sbi->s_li_request = NULL; | |
3091 | kfree(elr); | |
3092 | } | |
3093 | ||
3094 | static void ext4_unregister_li_request(struct super_block *sb) | |
3095 | { | |
1bb933fb LC |
3096 | mutex_lock(&ext4_li_mtx); |
3097 | if (!ext4_li_info) { | |
3098 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 3099 | return; |
1bb933fb | 3100 | } |
bfff6873 LC |
3101 | |
3102 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 3103 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 3104 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 3105 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
3106 | } |
3107 | ||
8f1f7453 ES |
3108 | static struct task_struct *ext4_lazyinit_task; |
3109 | ||
bfff6873 LC |
3110 | /* |
3111 | * This is the function where ext4lazyinit thread lives. It walks | |
3112 | * through the request list searching for next scheduled filesystem. | |
3113 | * When such a fs is found, run the lazy initialization request | |
3114 | * (ext4_rn_li_request) and keep track of the time spend in this | |
3115 | * function. Based on that time we compute next schedule time of | |
3116 | * the request. When walking through the list is complete, compute | |
3117 | * next waking time and put itself into sleep. | |
3118 | */ | |
3119 | static int ext4_lazyinit_thread(void *arg) | |
3120 | { | |
3121 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
3122 | struct list_head *pos, *n; | |
3123 | struct ext4_li_request *elr; | |
4ed5c033 | 3124 | unsigned long next_wakeup, cur; |
bfff6873 LC |
3125 | |
3126 | BUG_ON(NULL == eli); | |
3127 | ||
bfff6873 LC |
3128 | cont_thread: |
3129 | while (true) { | |
3130 | next_wakeup = MAX_JIFFY_OFFSET; | |
3131 | ||
3132 | mutex_lock(&eli->li_list_mtx); | |
3133 | if (list_empty(&eli->li_request_list)) { | |
3134 | mutex_unlock(&eli->li_list_mtx); | |
3135 | goto exit_thread; | |
3136 | } | |
bfff6873 | 3137 | list_for_each_safe(pos, n, &eli->li_request_list) { |
e22834f0 DM |
3138 | int err = 0; |
3139 | int progress = 0; | |
bfff6873 LC |
3140 | elr = list_entry(pos, struct ext4_li_request, |
3141 | lr_request); | |
3142 | ||
e22834f0 DM |
3143 | if (time_before(jiffies, elr->lr_next_sched)) { |
3144 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
3145 | next_wakeup = elr->lr_next_sched; | |
3146 | continue; | |
3147 | } | |
3148 | if (down_read_trylock(&elr->lr_super->s_umount)) { | |
3149 | if (sb_start_write_trylock(elr->lr_super)) { | |
3150 | progress = 1; | |
3151 | /* | |
3152 | * We hold sb->s_umount, sb can not | |
3153 | * be removed from the list, it is | |
3154 | * now safe to drop li_list_mtx | |
3155 | */ | |
3156 | mutex_unlock(&eli->li_list_mtx); | |
3157 | err = ext4_run_li_request(elr); | |
3158 | sb_end_write(elr->lr_super); | |
3159 | mutex_lock(&eli->li_list_mtx); | |
3160 | n = pos->next; | |
b2c78cd0 | 3161 | } |
e22834f0 DM |
3162 | up_read((&elr->lr_super->s_umount)); |
3163 | } | |
3164 | /* error, remove the lazy_init job */ | |
3165 | if (err) { | |
3166 | ext4_remove_li_request(elr); | |
3167 | continue; | |
3168 | } | |
3169 | if (!progress) { | |
3170 | elr->lr_next_sched = jiffies + | |
3171 | (prandom_u32() | |
3172 | % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 | 3173 | } |
bfff6873 LC |
3174 | if (time_before(elr->lr_next_sched, next_wakeup)) |
3175 | next_wakeup = elr->lr_next_sched; | |
3176 | } | |
3177 | mutex_unlock(&eli->li_list_mtx); | |
3178 | ||
a0acae0e | 3179 | try_to_freeze(); |
bfff6873 | 3180 | |
4ed5c033 LC |
3181 | cur = jiffies; |
3182 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 3183 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
3184 | cond_resched(); |
3185 | continue; | |
3186 | } | |
3187 | ||
4ed5c033 LC |
3188 | schedule_timeout_interruptible(next_wakeup - cur); |
3189 | ||
8f1f7453 ES |
3190 | if (kthread_should_stop()) { |
3191 | ext4_clear_request_list(); | |
3192 | goto exit_thread; | |
3193 | } | |
bfff6873 LC |
3194 | } |
3195 | ||
3196 | exit_thread: | |
3197 | /* | |
3198 | * It looks like the request list is empty, but we need | |
3199 | * to check it under the li_list_mtx lock, to prevent any | |
3200 | * additions into it, and of course we should lock ext4_li_mtx | |
3201 | * to atomically free the list and ext4_li_info, because at | |
3202 | * this point another ext4 filesystem could be registering | |
3203 | * new one. | |
3204 | */ | |
3205 | mutex_lock(&ext4_li_mtx); | |
3206 | mutex_lock(&eli->li_list_mtx); | |
3207 | if (!list_empty(&eli->li_request_list)) { | |
3208 | mutex_unlock(&eli->li_list_mtx); | |
3209 | mutex_unlock(&ext4_li_mtx); | |
3210 | goto cont_thread; | |
3211 | } | |
3212 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
3213 | kfree(ext4_li_info); |
3214 | ext4_li_info = NULL; | |
3215 | mutex_unlock(&ext4_li_mtx); | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
3220 | static void ext4_clear_request_list(void) | |
3221 | { | |
3222 | struct list_head *pos, *n; | |
3223 | struct ext4_li_request *elr; | |
3224 | ||
3225 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
3226 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
3227 | elr = list_entry(pos, struct ext4_li_request, | |
3228 | lr_request); | |
3229 | ext4_remove_li_request(elr); | |
3230 | } | |
3231 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3232 | } | |
3233 | ||
3234 | static int ext4_run_lazyinit_thread(void) | |
3235 | { | |
8f1f7453 ES |
3236 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
3237 | ext4_li_info, "ext4lazyinit"); | |
3238 | if (IS_ERR(ext4_lazyinit_task)) { | |
3239 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 3240 | ext4_clear_request_list(); |
bfff6873 LC |
3241 | kfree(ext4_li_info); |
3242 | ext4_li_info = NULL; | |
92b97816 | 3243 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
3244 | "initialization thread\n", |
3245 | err); | |
3246 | return err; | |
3247 | } | |
3248 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
3249 | return 0; |
3250 | } | |
3251 | ||
3252 | /* | |
3253 | * Check whether it make sense to run itable init. thread or not. | |
3254 | * If there is at least one uninitialized inode table, return | |
3255 | * corresponding group number, else the loop goes through all | |
3256 | * groups and return total number of groups. | |
3257 | */ | |
3258 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
3259 | { | |
3260 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
3261 | struct ext4_group_desc *gdp = NULL; | |
3262 | ||
8844618d TT |
3263 | if (!ext4_has_group_desc_csum(sb)) |
3264 | return ngroups; | |
3265 | ||
bfff6873 LC |
3266 | for (group = 0; group < ngroups; group++) { |
3267 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3268 | if (!gdp) | |
3269 | continue; | |
3270 | ||
50122847 | 3271 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
bfff6873 LC |
3272 | break; |
3273 | } | |
3274 | ||
3275 | return group; | |
3276 | } | |
3277 | ||
3278 | static int ext4_li_info_new(void) | |
3279 | { | |
3280 | struct ext4_lazy_init *eli = NULL; | |
3281 | ||
3282 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3283 | if (!eli) | |
3284 | return -ENOMEM; | |
3285 | ||
bfff6873 LC |
3286 | INIT_LIST_HEAD(&eli->li_request_list); |
3287 | mutex_init(&eli->li_list_mtx); | |
3288 | ||
bfff6873 LC |
3289 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3290 | ||
3291 | ext4_li_info = eli; | |
3292 | ||
3293 | return 0; | |
3294 | } | |
3295 | ||
3296 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3297 | ext4_group_t start) | |
3298 | { | |
3299 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3300 | struct ext4_li_request *elr; | |
bfff6873 LC |
3301 | |
3302 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3303 | if (!elr) | |
3304 | return NULL; | |
3305 | ||
3306 | elr->lr_super = sb; | |
3307 | elr->lr_sbi = sbi; | |
3308 | elr->lr_next_group = start; | |
3309 | ||
3310 | /* | |
3311 | * Randomize first schedule time of the request to | |
3312 | * spread the inode table initialization requests | |
3313 | * better. | |
3314 | */ | |
dd1f723b TT |
3315 | elr->lr_next_sched = jiffies + (prandom_u32() % |
3316 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
3317 | return elr; |
3318 | } | |
3319 | ||
7f511862 TT |
3320 | int ext4_register_li_request(struct super_block *sb, |
3321 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3322 | { |
3323 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3324 | struct ext4_li_request *elr = NULL; |
49598e04 | 3325 | ext4_group_t ngroups = sbi->s_groups_count; |
6c5a6cb9 | 3326 | int ret = 0; |
bfff6873 | 3327 | |
7f511862 | 3328 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3329 | if (sbi->s_li_request != NULL) { |
3330 | /* | |
3331 | * Reset timeout so it can be computed again, because | |
3332 | * s_li_wait_mult might have changed. | |
3333 | */ | |
3334 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3335 | goto out; |
51ce6511 | 3336 | } |
bfff6873 | 3337 | |
bc98a42c | 3338 | if (first_not_zeroed == ngroups || sb_rdonly(sb) || |
55ff3840 | 3339 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3340 | goto out; |
bfff6873 LC |
3341 | |
3342 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3343 | if (!elr) { |
3344 | ret = -ENOMEM; | |
3345 | goto out; | |
3346 | } | |
bfff6873 LC |
3347 | |
3348 | if (NULL == ext4_li_info) { | |
3349 | ret = ext4_li_info_new(); | |
3350 | if (ret) | |
3351 | goto out; | |
3352 | } | |
3353 | ||
3354 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3355 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3356 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3357 | ||
3358 | sbi->s_li_request = elr; | |
46e4690b TM |
3359 | /* |
3360 | * set elr to NULL here since it has been inserted to | |
3361 | * the request_list and the removal and free of it is | |
3362 | * handled by ext4_clear_request_list from now on. | |
3363 | */ | |
3364 | elr = NULL; | |
bfff6873 LC |
3365 | |
3366 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3367 | ret = ext4_run_lazyinit_thread(); | |
3368 | if (ret) | |
3369 | goto out; | |
3370 | } | |
bfff6873 | 3371 | out: |
beed5ecb NK |
3372 | mutex_unlock(&ext4_li_mtx); |
3373 | if (ret) | |
bfff6873 | 3374 | kfree(elr); |
bfff6873 LC |
3375 | return ret; |
3376 | } | |
3377 | ||
3378 | /* | |
3379 | * We do not need to lock anything since this is called on | |
3380 | * module unload. | |
3381 | */ | |
3382 | static void ext4_destroy_lazyinit_thread(void) | |
3383 | { | |
3384 | /* | |
3385 | * If thread exited earlier | |
3386 | * there's nothing to be done. | |
3387 | */ | |
8f1f7453 | 3388 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3389 | return; |
3390 | ||
8f1f7453 | 3391 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3392 | } |
3393 | ||
25ed6e8a DW |
3394 | static int set_journal_csum_feature_set(struct super_block *sb) |
3395 | { | |
3396 | int ret = 1; | |
3397 | int compat, incompat; | |
3398 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3399 | ||
9aa5d32b | 3400 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 3401 | /* journal checksum v3 */ |
25ed6e8a | 3402 | compat = 0; |
db9ee220 | 3403 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
3404 | } else { |
3405 | /* journal checksum v1 */ | |
3406 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3407 | incompat = 0; | |
3408 | } | |
3409 | ||
feb8c6d3 DW |
3410 | jbd2_journal_clear_features(sbi->s_journal, |
3411 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3412 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
3413 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
3414 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3415 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3416 | compat, 0, | |
3417 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3418 | incompat); | |
3419 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3420 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3421 | compat, 0, | |
3422 | incompat); | |
3423 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3424 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3425 | } else { | |
feb8c6d3 DW |
3426 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3427 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
3428 | } |
3429 | ||
3430 | return ret; | |
3431 | } | |
3432 | ||
952fc18e TT |
3433 | /* |
3434 | * Note: calculating the overhead so we can be compatible with | |
3435 | * historical BSD practice is quite difficult in the face of | |
3436 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3437 | * different block group can end up in the same allocation cluster. | |
3438 | * Calculating the exact overhead in the face of clustered allocation | |
3439 | * requires either O(all block bitmaps) in memory or O(number of block | |
3440 | * groups**2) in time. We will still calculate the superblock for | |
3441 | * older file systems --- and if we come across with a bigalloc file | |
3442 | * system with zero in s_overhead_clusters the estimate will be close to | |
3443 | * correct especially for very large cluster sizes --- but for newer | |
3444 | * file systems, it's better to calculate this figure once at mkfs | |
3445 | * time, and store it in the superblock. If the superblock value is | |
3446 | * present (even for non-bigalloc file systems), we will use it. | |
3447 | */ | |
3448 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3449 | char *buf) | |
3450 | { | |
3451 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3452 | struct ext4_group_desc *gdp; | |
3453 | ext4_fsblk_t first_block, last_block, b; | |
3454 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3455 | int s, j, count = 0; | |
3456 | ||
e2b911c5 | 3457 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3458 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3459 | sbi->s_itb_per_group + 2); | |
3460 | ||
952fc18e TT |
3461 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3462 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3463 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3464 | for (i = 0; i < ngroups; i++) { | |
3465 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3466 | b = ext4_block_bitmap(sb, gdp); | |
3467 | if (b >= first_block && b <= last_block) { | |
3468 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3469 | count++; | |
3470 | } | |
3471 | b = ext4_inode_bitmap(sb, gdp); | |
3472 | if (b >= first_block && b <= last_block) { | |
3473 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3474 | count++; | |
3475 | } | |
3476 | b = ext4_inode_table(sb, gdp); | |
3477 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3478 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3479 | int c = EXT4_B2C(sbi, b - first_block); | |
3480 | ext4_set_bit(c, buf); | |
3481 | count++; | |
3482 | } | |
3483 | if (i != grp) | |
3484 | continue; | |
3485 | s = 0; | |
3486 | if (ext4_bg_has_super(sb, grp)) { | |
3487 | ext4_set_bit(s++, buf); | |
3488 | count++; | |
3489 | } | |
c48ae41b TT |
3490 | j = ext4_bg_num_gdb(sb, grp); |
3491 | if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { | |
3492 | ext4_error(sb, "Invalid number of block group " | |
3493 | "descriptor blocks: %d", j); | |
3494 | j = EXT4_BLOCKS_PER_GROUP(sb) - s; | |
952fc18e | 3495 | } |
c48ae41b TT |
3496 | count += j; |
3497 | for (; j > 0; j--) | |
3498 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
952fc18e TT |
3499 | } |
3500 | if (!count) | |
3501 | return 0; | |
3502 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3503 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3504 | } | |
3505 | ||
3506 | /* | |
3507 | * Compute the overhead and stash it in sbi->s_overhead | |
3508 | */ | |
3509 | int ext4_calculate_overhead(struct super_block *sb) | |
3510 | { | |
3511 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3512 | struct ext4_super_block *es = sbi->s_es; | |
3c816ded EW |
3513 | struct inode *j_inode; |
3514 | unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); | |
952fc18e TT |
3515 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
3516 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3517 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3518 | |
952fc18e TT |
3519 | if (!buf) |
3520 | return -ENOMEM; | |
3521 | ||
3522 | /* | |
3523 | * Compute the overhead (FS structures). This is constant | |
3524 | * for a given filesystem unless the number of block groups | |
3525 | * changes so we cache the previous value until it does. | |
3526 | */ | |
3527 | ||
3528 | /* | |
3529 | * All of the blocks before first_data_block are overhead | |
3530 | */ | |
3531 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3532 | ||
3533 | /* | |
3534 | * Add the overhead found in each block group | |
3535 | */ | |
3536 | for (i = 0; i < ngroups; i++) { | |
3537 | int blks; | |
3538 | ||
3539 | blks = count_overhead(sb, i, buf); | |
3540 | overhead += blks; | |
3541 | if (blks) | |
3542 | memset(buf, 0, PAGE_SIZE); | |
3543 | cond_resched(); | |
3544 | } | |
3c816ded EW |
3545 | |
3546 | /* | |
3547 | * Add the internal journal blocks whether the journal has been | |
3548 | * loaded or not | |
3549 | */ | |
b003b524 | 3550 | if (sbi->s_journal && !sbi->journal_bdev) |
810da240 | 3551 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
3c816ded EW |
3552 | else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { |
3553 | j_inode = ext4_get_journal_inode(sb, j_inum); | |
3554 | if (j_inode) { | |
3555 | j_blocks = j_inode->i_size >> sb->s_blocksize_bits; | |
3556 | overhead += EXT4_NUM_B2C(sbi, j_blocks); | |
3557 | iput(j_inode); | |
3558 | } else { | |
3559 | ext4_msg(sb, KERN_ERR, "can't get journal size"); | |
3560 | } | |
3561 | } | |
952fc18e TT |
3562 | sbi->s_overhead = overhead; |
3563 | smp_wmb(); | |
3564 | free_page((unsigned long) buf); | |
3565 | return 0; | |
3566 | } | |
3567 | ||
7bc04c5c BR |
3568 | static void ext4_clamp_want_extra_isize(struct super_block *sb) |
3569 | { | |
3570 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3571 | struct ext4_super_block *es = sbi->s_es; | |
3572 | ||
3573 | /* determine the minimum size of new large inodes, if present */ | |
3574 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && | |
3575 | sbi->s_want_extra_isize == 0) { | |
3576 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3577 | EXT4_GOOD_OLD_INODE_SIZE; | |
3578 | if (ext4_has_feature_extra_isize(sb)) { | |
3579 | if (sbi->s_want_extra_isize < | |
3580 | le16_to_cpu(es->s_want_extra_isize)) | |
3581 | sbi->s_want_extra_isize = | |
3582 | le16_to_cpu(es->s_want_extra_isize); | |
3583 | if (sbi->s_want_extra_isize < | |
3584 | le16_to_cpu(es->s_min_extra_isize)) | |
3585 | sbi->s_want_extra_isize = | |
3586 | le16_to_cpu(es->s_min_extra_isize); | |
3587 | } | |
3588 | } | |
3589 | /* Check if enough inode space is available */ | |
3590 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3591 | sbi->s_inode_size) { | |
3592 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3593 | EXT4_GOOD_OLD_INODE_SIZE; | |
3594 | ext4_msg(sb, KERN_INFO, | |
3595 | "required extra inode space not available"); | |
3596 | } | |
3597 | } | |
3598 | ||
b5799018 | 3599 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3600 | { |
3601 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3602 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3603 | |
30fac0f7 JK |
3604 | /* |
3605 | * There's no need to reserve anything when we aren't using extents. | |
3606 | * The space estimates are exact, there are no unwritten extents, | |
3607 | * hole punching doesn't need new metadata... This is needed especially | |
3608 | * to keep ext2/3 backward compatibility. | |
3609 | */ | |
e2b911c5 | 3610 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3611 | return; |
27dd4385 LC |
3612 | /* |
3613 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3614 | * This should cover the situations where we can not afford to run | |
3615 | * out of space like for example punch hole, or converting | |
556615dc | 3616 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3617 | * allocation would require 1, or 2 blocks, higher numbers are |
3618 | * very rare. | |
3619 | */ | |
b5799018 TT |
3620 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3621 | sbi->s_cluster_bits); | |
27dd4385 LC |
3622 | |
3623 | do_div(resv_clusters, 50); | |
3624 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3625 | ||
b5799018 | 3626 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3627 | } |
3628 | ||
2b2d6d01 | 3629 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3630 | { |
5e405595 | 3631 | struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); |
d4c402d9 | 3632 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3633 | struct buffer_head *bh; |
617ba13b | 3634 | struct ext4_super_block *es = NULL; |
5aee0f8a | 3635 | struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
617ba13b MC |
3636 | ext4_fsblk_t block; |
3637 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3638 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3639 | unsigned long offset = 0; |
ac27a0ec DK |
3640 | unsigned long journal_devnum = 0; |
3641 | unsigned long def_mount_opts; | |
3642 | struct inode *root; | |
0390131b | 3643 | const char *descr; |
dcc7dae3 | 3644 | int ret = -ENOMEM; |
281b5995 | 3645 | int blocksize, clustersize; |
4ec11028 TT |
3646 | unsigned int db_count; |
3647 | unsigned int i; | |
281b5995 | 3648 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3649 | __u64 blocks_count; |
07aa2ea1 | 3650 | int err = 0; |
b3881f74 | 3651 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3652 | ext4_group_t first_not_zeroed; |
ac27a0ec | 3653 | |
5aee0f8a TT |
3654 | if ((data && !orig_data) || !sbi) |
3655 | goto out_free_base; | |
705895b6 | 3656 | |
0c3fded3 SF |
3657 | if (!userns_mounts && !capable(CAP_SYS_ADMIN)) { |
3658 | ret = -EPERM; | |
3659 | goto out_free_base; | |
3660 | } | |
3661 | ||
aed9eb1b | 3662 | sbi->s_daxdev = dax_dev; |
705895b6 PE |
3663 | sbi->s_blockgroup_lock = |
3664 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
5aee0f8a TT |
3665 | if (!sbi->s_blockgroup_lock) |
3666 | goto out_free_base; | |
3667 | ||
ac27a0ec | 3668 | sb->s_fs_info = sbi; |
2c0544b2 | 3669 | sbi->s_sb = sb; |
240799cd | 3670 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3671 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3672 | if (sb->s_bdev->bd_part) |
3673 | sbi->s_sectors_written_start = | |
dbae2c55 | 3674 | part_stat_read(sb->s_bdev->bd_part, sectors[STAT_WRITE]); |
ac27a0ec | 3675 | |
9f6200bb | 3676 | /* Cleanup superblock name */ |
ec3904dc | 3677 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3678 | |
07aa2ea1 | 3679 | /* -EINVAL is default */ |
dcc7dae3 | 3680 | ret = -EINVAL; |
617ba13b | 3681 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3682 | if (!blocksize) { |
b31e1552 | 3683 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3684 | goto out_fail; |
3685 | } | |
3686 | ||
3687 | /* | |
617ba13b | 3688 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3689 | * block sizes. We need to calculate the offset from buffer start. |
3690 | */ | |
617ba13b | 3691 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3692 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3693 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3694 | } else { |
70bbb3e0 | 3695 | logical_sb_block = sb_block; |
ac27a0ec DK |
3696 | } |
3697 | ||
a8ac900b | 3698 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3699 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3700 | goto out_fail; |
3701 | } | |
3702 | /* | |
3703 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3704 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3705 | */ |
2716b802 | 3706 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3707 | sbi->s_es = es; |
3708 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3709 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3710 | goto cantfind_ext4; | |
afc32f7e | 3711 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3712 | |
feb0ab32 | 3713 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3714 | if (ext4_has_feature_metadata_csum(sb) && |
3715 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3716 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3717 | "redundant flags; please run fsck."); |
3718 | ||
d25425f8 DW |
3719 | /* Check for a known checksum algorithm */ |
3720 | if (!ext4_verify_csum_type(sb, es)) { | |
3721 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3722 | "unknown checksum algorithm."); | |
3723 | silent = 1; | |
3724 | goto cantfind_ext4; | |
3725 | } | |
3726 | ||
0441984a | 3727 | /* Load the checksum driver */ |
a45403b5 TT |
3728 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3729 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3730 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3731 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3732 | sbi->s_chksum_driver = NULL; | |
3733 | goto failed_mount; | |
0441984a DW |
3734 | } |
3735 | ||
a9c47317 DW |
3736 | /* Check superblock checksum */ |
3737 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3738 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3739 | "invalid superblock checksum. Run e2fsck?"); | |
3740 | silent = 1; | |
6a797d27 | 3741 | ret = -EFSBADCRC; |
a9c47317 DW |
3742 | goto cantfind_ext4; |
3743 | } | |
3744 | ||
3745 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3746 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f | 3747 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
dec214d0 | 3748 | else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) |
a9c47317 DW |
3749 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3750 | sizeof(es->s_uuid)); | |
3751 | ||
ac27a0ec DK |
3752 | /* Set defaults before we parse the mount options */ |
3753 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3754 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3755 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3756 | set_opt(sb, DEBUG); |
87f26807 | 3757 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3758 | set_opt(sb, GRPID); |
617ba13b | 3759 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3760 | set_opt(sb, NO_UID32); |
ea663336 | 3761 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3762 | set_opt(sb, XATTR_USER); |
03010a33 | 3763 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3764 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3765 | #endif |
98c1a759 DW |
3766 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3767 | if (ext4_has_metadata_csum(sb)) | |
3768 | set_opt(sb, JOURNAL_CHECKSUM); | |
3769 | ||
617ba13b | 3770 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3771 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3772 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3773 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3774 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3775 | set_opt(sb, WRITEBACK_DATA); |
617ba13b | 3776 | |
0dcf2745 SF |
3777 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) { |
3778 | if (!capable(CAP_SYS_ADMIN)) | |
3779 | goto failed_mount; | |
fd8c37ec | 3780 | set_opt(sb, ERRORS_PANIC); |
0dcf2745 | 3781 | } else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) { |
fd8c37ec | 3782 | set_opt(sb, ERRORS_CONT); |
0dcf2745 | 3783 | } else { |
fd8c37ec | 3784 | set_opt(sb, ERRORS_RO); |
0dcf2745 | 3785 | } |
45f1a9c3 DW |
3786 | /* block_validity enabled by default; disable with noblock_validity */ |
3787 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3788 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3789 | set_opt(sb, DISCARD); |
ac27a0ec | 3790 | |
0dcf2745 SF |
3791 | sbi->s_resuid = make_kuid(sb->s_user_ns, le16_to_cpu(es->s_def_resuid)); |
3792 | if (!uid_valid(sbi->s_resuid)) | |
3793 | sbi->s_resuid = make_kuid(sb->s_user_ns, EXT4_DEF_RESUID); | |
3794 | sbi->s_resgid = make_kgid(sb->s_user_ns, le16_to_cpu(es->s_def_resgid)); | |
3795 | if (!gid_valid(sbi->s_resgid)) | |
3796 | sbi->s_resgid = make_kgid(sb->s_user_ns, EXT4_DEF_RESGID); | |
30773840 TT |
3797 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3798 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3799 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3800 | |
8b67f04a | 3801 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3802 | set_opt(sb, BARRIER); |
ac27a0ec | 3803 | |
dd919b98 AK |
3804 | /* |
3805 | * enable delayed allocation by default | |
3806 | * Use -o nodelalloc to turn it off | |
3807 | */ | |
bc0b75f7 | 3808 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3809 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3810 | set_opt(sb, DELALLOC); |
dd919b98 | 3811 | |
51ce6511 LC |
3812 | /* |
3813 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3814 | * no mount option specified. | |
3815 | */ | |
3816 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3817 | ||
5aee0f8a TT |
3818 | if (sbi->s_es->s_mount_opts[0]) { |
3819 | char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, | |
3820 | sizeof(sbi->s_es->s_mount_opts), | |
3821 | GFP_KERNEL); | |
3822 | if (!s_mount_opts) | |
3823 | goto failed_mount; | |
3824 | if (!parse_options(s_mount_opts, sb, &journal_devnum, | |
3825 | &journal_ioprio, 0)) { | |
3826 | ext4_msg(sb, KERN_WARNING, | |
3827 | "failed to parse options in superblock: %s", | |
3828 | s_mount_opts); | |
3829 | } | |
3830 | kfree(s_mount_opts); | |
8b67f04a | 3831 | } |
5a916be1 | 3832 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3833 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3834 | &journal_ioprio, 0)) |
ac27a0ec DK |
3835 | goto failed_mount; |
3836 | ||
c83ad55e GKB |
3837 | #ifdef CONFIG_UNICODE |
3838 | if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) { | |
3839 | const struct ext4_sb_encodings *encoding_info; | |
3840 | struct unicode_map *encoding; | |
3841 | __u16 encoding_flags; | |
3842 | ||
3843 | if (ext4_has_feature_encrypt(sb)) { | |
3844 | ext4_msg(sb, KERN_ERR, | |
3845 | "Can't mount with encoding and encryption"); | |
3846 | goto failed_mount; | |
3847 | } | |
3848 | ||
3849 | if (ext4_sb_read_encoding(es, &encoding_info, | |
3850 | &encoding_flags)) { | |
3851 | ext4_msg(sb, KERN_ERR, | |
3852 | "Encoding requested by superblock is unknown"); | |
3853 | goto failed_mount; | |
3854 | } | |
3855 | ||
3856 | encoding = utf8_load(encoding_info->version); | |
3857 | if (IS_ERR(encoding)) { | |
3858 | ext4_msg(sb, KERN_ERR, | |
3859 | "can't mount with superblock charset: %s-%s " | |
3860 | "not supported by the kernel. flags: 0x%x.", | |
3861 | encoding_info->name, encoding_info->version, | |
3862 | encoding_flags); | |
3863 | goto failed_mount; | |
3864 | } | |
3865 | ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " | |
3866 | "%s-%s with flags 0x%hx", encoding_info->name, | |
3867 | encoding_info->version?:"\b", encoding_flags); | |
3868 | ||
3869 | sbi->s_encoding = encoding; | |
3870 | sbi->s_encoding_flags = encoding_flags; | |
3871 | } | |
3872 | #endif | |
3873 | ||
56889787 TT |
3874 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3875 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3876 | "with data=journal disables delayed " | |
3877 | "allocation and O_DIRECT support!\n"); | |
3878 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3879 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3880 | "both data=journal and delalloc"); | |
3881 | goto failed_mount; | |
3882 | } | |
3883 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3884 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3885 | "both data=journal and dioread_nolock"); |
56889787 TT |
3886 | goto failed_mount; |
3887 | } | |
923ae0ff RZ |
3888 | if (test_opt(sb, DAX)) { |
3889 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3890 | "both data=journal and dax"); | |
3891 | goto failed_mount; | |
3892 | } | |
73b92a2a SK |
3893 | if (ext4_has_feature_encrypt(sb)) { |
3894 | ext4_msg(sb, KERN_WARNING, | |
3895 | "encrypted files will use data=ordered " | |
3896 | "instead of data journaling mode"); | |
3897 | } | |
56889787 TT |
3898 | if (test_opt(sb, DELALLOC)) |
3899 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3900 | } else { |
3901 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3902 | } |
3903 | ||
1751e8a6 LT |
3904 | sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | |
3905 | (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); | |
ac27a0ec | 3906 | |
617ba13b | 3907 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3908 | (ext4_has_compat_features(sb) || |
3909 | ext4_has_ro_compat_features(sb) || | |
3910 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3911 | ext4_msg(sb, KERN_WARNING, |
3912 | "feature flags set on rev 0 fs, " | |
3913 | "running e2fsck is recommended"); | |
469108ff | 3914 | |
ed3654eb TT |
3915 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3916 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3917 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3918 | ext4_msg(sb, KERN_ERR, |
3919 | "The Hurd can't support 64-bit file systems"); | |
3920 | goto failed_mount; | |
3921 | } | |
dec214d0 TE |
3922 | |
3923 | /* | |
3924 | * ea_inode feature uses l_i_version field which is not | |
3925 | * available in HURD_COMPAT mode. | |
3926 | */ | |
3927 | if (ext4_has_feature_ea_inode(sb)) { | |
3928 | ext4_msg(sb, KERN_ERR, | |
3929 | "ea_inode feature is not supported for Hurd"); | |
3930 | goto failed_mount; | |
3931 | } | |
ed3654eb TT |
3932 | } |
3933 | ||
2035e776 TT |
3934 | if (IS_EXT2_SB(sb)) { |
3935 | if (ext2_feature_set_ok(sb)) | |
3936 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3937 | "using the ext4 subsystem"); | |
3938 | else { | |
0d9366d6 ES |
3939 | /* |
3940 | * If we're probing be silent, if this looks like | |
3941 | * it's actually an ext[34] filesystem. | |
3942 | */ | |
3943 | if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) | |
3944 | goto failed_mount; | |
2035e776 TT |
3945 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " |
3946 | "to feature incompatibilities"); | |
3947 | goto failed_mount; | |
3948 | } | |
3949 | } | |
3950 | ||
3951 | if (IS_EXT3_SB(sb)) { | |
3952 | if (ext3_feature_set_ok(sb)) | |
3953 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3954 | "using the ext4 subsystem"); | |
3955 | else { | |
0d9366d6 ES |
3956 | /* |
3957 | * If we're probing be silent, if this looks like | |
3958 | * it's actually an ext4 filesystem. | |
3959 | */ | |
3960 | if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) | |
3961 | goto failed_mount; | |
2035e776 TT |
3962 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " |
3963 | "to feature incompatibilities"); | |
3964 | goto failed_mount; | |
3965 | } | |
3966 | } | |
3967 | ||
ac27a0ec DK |
3968 | /* |
3969 | * Check feature flags regardless of the revision level, since we | |
3970 | * previously didn't change the revision level when setting the flags, | |
3971 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3972 | */ | |
bc98a42c | 3973 | if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) |
ac27a0ec | 3974 | goto failed_mount; |
a13fb1a4 | 3975 | |
261cb20c | 3976 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3977 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3978 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 | 3979 | ext4_msg(sb, KERN_ERR, |
8cdf3372 TT |
3980 | "Unsupported filesystem blocksize %d (%d log_block_size)", |
3981 | blocksize, le32_to_cpu(es->s_log_block_size)); | |
3982 | goto failed_mount; | |
3983 | } | |
3984 | if (le32_to_cpu(es->s_log_block_size) > | |
3985 | (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3986 | ext4_msg(sb, KERN_ERR, | |
3987 | "Invalid log block size: %u", | |
3988 | le32_to_cpu(es->s_log_block_size)); | |
ac27a0ec DK |
3989 | goto failed_mount; |
3990 | } | |
bfe0a5f4 TT |
3991 | if (le32_to_cpu(es->s_log_cluster_size) > |
3992 | (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3993 | ext4_msg(sb, KERN_ERR, | |
3994 | "Invalid log cluster size: %u", | |
3995 | le32_to_cpu(es->s_log_cluster_size)); | |
3996 | goto failed_mount; | |
3997 | } | |
ac27a0ec | 3998 | |
5b9554dc TT |
3999 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { |
4000 | ext4_msg(sb, KERN_ERR, | |
4001 | "Number of reserved GDT blocks insanely large: %d", | |
4002 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); | |
4003 | goto failed_mount; | |
4004 | } | |
4005 | ||
923ae0ff | 4006 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
559db4c6 RZ |
4007 | if (ext4_has_feature_inline_data(sb)) { |
4008 | ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" | |
4009 | " that may contain inline data"); | |
361d24d4 | 4010 | goto failed_mount; |
559db4c6 | 4011 | } |
80660f20 | 4012 | if (!bdev_dax_supported(sb->s_bdev, blocksize)) { |
24f3478d | 4013 | ext4_msg(sb, KERN_ERR, |
361d24d4 ES |
4014 | "DAX unsupported by block device."); |
4015 | goto failed_mount; | |
24f3478d | 4016 | } |
923ae0ff RZ |
4017 | } |
4018 | ||
e2b911c5 | 4019 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
4020 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
4021 | es->s_encryption_level); | |
4022 | goto failed_mount; | |
4023 | } | |
4024 | ||
ac27a0ec | 4025 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
4026 | /* Validate the filesystem blocksize */ |
4027 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 4028 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 4029 | blocksize); |
ac27a0ec DK |
4030 | goto failed_mount; |
4031 | } | |
4032 | ||
2b2d6d01 | 4033 | brelse(bh); |
70bbb3e0 AM |
4034 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
4035 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 4036 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 4037 | if (!bh) { |
b31e1552 ES |
4038 | ext4_msg(sb, KERN_ERR, |
4039 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
4040 | goto failed_mount; |
4041 | } | |
2716b802 | 4042 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 4043 | sbi->s_es = es; |
617ba13b | 4044 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
4045 | ext4_msg(sb, KERN_ERR, |
4046 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
4047 | goto failed_mount; |
4048 | } | |
4049 | } | |
4050 | ||
e2b911c5 | 4051 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
4052 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
4053 | has_huge_files); | |
4054 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 4055 | |
617ba13b MC |
4056 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
4057 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
4058 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
4059 | } else { |
4060 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
4061 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
c37e9e01 TT |
4062 | if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { |
4063 | ext4_msg(sb, KERN_ERR, "invalid first ino: %u", | |
4064 | sbi->s_first_ino); | |
4065 | goto failed_mount; | |
4066 | } | |
617ba13b | 4067 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 4068 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 4069 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
4070 | ext4_msg(sb, KERN_ERR, |
4071 | "unsupported inode size: %d", | |
2b2d6d01 | 4072 | sbi->s_inode_size); |
ac27a0ec DK |
4073 | goto failed_mount; |
4074 | } | |
ef7f3835 KS |
4075 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
4076 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 4077 | } |
0b8e58a1 | 4078 | |
0d1ee42f | 4079 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 4080 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 4081 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 4082 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 4083 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
4084 | ext4_msg(sb, KERN_ERR, |
4085 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
4086 | sbi->s_desc_size); |
4087 | goto failed_mount; | |
4088 | } | |
4089 | } else | |
4090 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 4091 | |
ac27a0ec | 4092 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 4093 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
0b8e58a1 | 4094 | |
617ba13b | 4095 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 4096 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 4097 | goto cantfind_ext4; |
cd6bb35b TT |
4098 | if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || |
4099 | sbi->s_inodes_per_group > blocksize * 8) { | |
4100 | ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", | |
4101 | sbi->s_blocks_per_group); | |
4102 | goto failed_mount; | |
4103 | } | |
ac27a0ec DK |
4104 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
4105 | sbi->s_inodes_per_block; | |
0d1ee42f | 4106 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
4107 | sbi->s_sbh = bh; |
4108 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
4109 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
4110 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 4111 | |
2b2d6d01 | 4112 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
4113 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
4114 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 4115 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
4116 | i = le32_to_cpu(es->s_flags); |
4117 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
4118 | sbi->s_hash_unsigned = 3; | |
4119 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 4120 | #ifdef __CHAR_UNSIGNED__ |
bc98a42c | 4121 | if (!sb_rdonly(sb)) |
23301410 TT |
4122 | es->s_flags |= |
4123 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
4124 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 4125 | #else |
bc98a42c | 4126 | if (!sb_rdonly(sb)) |
23301410 TT |
4127 | es->s_flags |= |
4128 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 4129 | #endif |
23301410 | 4130 | } |
f99b2589 | 4131 | } |
ac27a0ec | 4132 | |
281b5995 TT |
4133 | /* Handle clustersize */ |
4134 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 4135 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
4136 | if (has_bigalloc) { |
4137 | if (clustersize < blocksize) { | |
4138 | ext4_msg(sb, KERN_ERR, | |
4139 | "cluster size (%d) smaller than " | |
4140 | "block size (%d)", clustersize, blocksize); | |
4141 | goto failed_mount; | |
4142 | } | |
4143 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
4144 | le32_to_cpu(es->s_log_block_size); | |
4145 | sbi->s_clusters_per_group = | |
4146 | le32_to_cpu(es->s_clusters_per_group); | |
4147 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
4148 | ext4_msg(sb, KERN_ERR, | |
4149 | "#clusters per group too big: %lu", | |
4150 | sbi->s_clusters_per_group); | |
4151 | goto failed_mount; | |
4152 | } | |
4153 | if (sbi->s_blocks_per_group != | |
4154 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
4155 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
4156 | "clusters per group (%lu) inconsistent", | |
4157 | sbi->s_blocks_per_group, | |
4158 | sbi->s_clusters_per_group); | |
4159 | goto failed_mount; | |
4160 | } | |
4161 | } else { | |
4162 | if (clustersize != blocksize) { | |
bfe0a5f4 TT |
4163 | ext4_msg(sb, KERN_ERR, |
4164 | "fragment/cluster size (%d) != " | |
4165 | "block size (%d)", clustersize, blocksize); | |
4166 | goto failed_mount; | |
281b5995 TT |
4167 | } |
4168 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
4169 | ext4_msg(sb, KERN_ERR, | |
4170 | "#blocks per group too big: %lu", | |
4171 | sbi->s_blocks_per_group); | |
4172 | goto failed_mount; | |
4173 | } | |
4174 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
4175 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 4176 | } |
281b5995 TT |
4177 | sbi->s_cluster_ratio = clustersize / blocksize; |
4178 | ||
960fd856 TT |
4179 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
4180 | if (sbi->s_blocks_per_group == clustersize << 3) | |
4181 | set_opt2(sb, STD_GROUP_SIZE); | |
4182 | ||
bf43d84b ES |
4183 | /* |
4184 | * Test whether we have more sectors than will fit in sector_t, | |
4185 | * and whether the max offset is addressable by the page cache. | |
4186 | */ | |
5a9ae68a | 4187 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 4188 | ext4_blocks_count(es)); |
5a9ae68a | 4189 | if (err) { |
b31e1552 | 4190 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 4191 | " too large to mount safely on this system"); |
ac27a0ec DK |
4192 | goto failed_mount; |
4193 | } | |
4194 | ||
617ba13b MC |
4195 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
4196 | goto cantfind_ext4; | |
e7c95593 | 4197 | |
0f2ddca6 FTN |
4198 | /* check blocks count against device size */ |
4199 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
4200 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
4201 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
4202 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
4203 | ext4_blocks_count(es), blocks_count); |
4204 | goto failed_mount; | |
4205 | } | |
4206 | ||
0b8e58a1 AD |
4207 | /* |
4208 | * It makes no sense for the first data block to be beyond the end | |
4209 | * of the filesystem. | |
4210 | */ | |
4211 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 4212 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
4213 | "block %u is beyond end of filesystem (%llu)", |
4214 | le32_to_cpu(es->s_first_data_block), | |
4215 | ext4_blocks_count(es)); | |
e7c95593 ES |
4216 | goto failed_mount; |
4217 | } | |
bfe0a5f4 TT |
4218 | if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && |
4219 | (sbi->s_cluster_ratio == 1)) { | |
4220 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " | |
4221 | "block is 0 with a 1k block and cluster size"); | |
4222 | goto failed_mount; | |
4223 | } | |
4224 | ||
bd81d8ee LV |
4225 | blocks_count = (ext4_blocks_count(es) - |
4226 | le32_to_cpu(es->s_first_data_block) + | |
4227 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
4228 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 4229 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 4230 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 4231 | "(block count %llu, first data block %u, " |
b31e1552 | 4232 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
4233 | ext4_blocks_count(es), |
4234 | le32_to_cpu(es->s_first_data_block), | |
4235 | EXT4_BLOCKS_PER_GROUP(sb)); | |
4236 | goto failed_mount; | |
4237 | } | |
bd81d8ee | 4238 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
4239 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
4240 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
9e463084 TT |
4241 | if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != |
4242 | le32_to_cpu(es->s_inodes_count)) { | |
4243 | ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", | |
4244 | le32_to_cpu(es->s_inodes_count), | |
4245 | ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); | |
4246 | ret = -EINVAL; | |
4247 | goto failed_mount; | |
4248 | } | |
617ba13b MC |
4249 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
4250 | EXT4_DESC_PER_BLOCK(sb); | |
3a4b77cd | 4251 | if (ext4_has_feature_meta_bg(sb)) { |
2ba3e6e8 | 4252 | if (le32_to_cpu(es->s_first_meta_bg) > db_count) { |
3a4b77cd EG |
4253 | ext4_msg(sb, KERN_WARNING, |
4254 | "first meta block group too large: %u " | |
4255 | "(group descriptor block count %u)", | |
4256 | le32_to_cpu(es->s_first_meta_bg), db_count); | |
4257 | goto failed_mount; | |
4258 | } | |
4259 | } | |
344476e1 KC |
4260 | sbi->s_group_desc = kvmalloc_array(db_count, |
4261 | sizeof(struct buffer_head *), | |
4262 | GFP_KERNEL); | |
ac27a0ec | 4263 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 4264 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 4265 | ret = -ENOMEM; |
ac27a0ec DK |
4266 | goto failed_mount; |
4267 | } | |
4268 | ||
705895b6 | 4269 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec | 4270 | |
85c8f176 AP |
4271 | /* Pre-read the descriptors into the buffer cache */ |
4272 | for (i = 0; i < db_count; i++) { | |
4273 | block = descriptor_loc(sb, logical_sb_block, i); | |
4274 | sb_breadahead(sb, block); | |
4275 | } | |
4276 | ||
ac27a0ec | 4277 | for (i = 0; i < db_count; i++) { |
70bbb3e0 | 4278 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 4279 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 4280 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
4281 | ext4_msg(sb, KERN_ERR, |
4282 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
4283 | db_count = i; |
4284 | goto failed_mount2; | |
4285 | } | |
4286 | } | |
44de022c | 4287 | sbi->s_gdb_count = db_count; |
829fa70d | 4288 | if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { |
b31e1552 | 4289 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 4290 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 4291 | goto failed_mount2; |
ac27a0ec | 4292 | } |
772cb7c8 | 4293 | |
235699a8 | 4294 | timer_setup(&sbi->s_err_report, print_daily_error_info, 0); |
04496411 | 4295 | |
a75ae78f | 4296 | /* Register extent status tree shrinker */ |
eb68d0e2 | 4297 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 4298 | goto failed_mount3; |
ce7e010a | 4299 | |
c9de560d | 4300 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 4301 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 4302 | |
f9ae9cf5 TT |
4303 | /* |
4304 | * set up enough so that it can read an inode | |
4305 | */ | |
f6e63f90 | 4306 | sb->s_op = &ext4_sops; |
617ba13b MC |
4307 | sb->s_export_op = &ext4_export_ops; |
4308 | sb->s_xattr = ext4_xattr_handlers; | |
643fa961 | 4309 | #ifdef CONFIG_FS_ENCRYPTION |
a7550b30 | 4310 | sb->s_cop = &ext4_cryptops; |
ffcc4182 | 4311 | #endif |
ac27a0ec | 4312 | #ifdef CONFIG_QUOTA |
617ba13b | 4313 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 4314 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 4315 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
4316 | else |
4317 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 4318 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 4319 | #endif |
85787090 | 4320 | memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
f2fa2ffc | 4321 | |
ac27a0ec | 4322 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 4323 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
4324 | |
4325 | sb->s_root = NULL; | |
4326 | ||
4327 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 4328 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 4329 | |
bc98a42c | 4330 | if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) |
c5e06d10 | 4331 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 4332 | goto failed_mount3a; |
c5e06d10 | 4333 | |
ac27a0ec DK |
4334 | /* |
4335 | * The first inode we look at is the journal inode. Don't try | |
4336 | * root first: it may be modified in the journal! | |
4337 | */ | |
e2b911c5 | 4338 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
4753d8a2 TT |
4339 | err = ext4_load_journal(sb, es, journal_devnum); |
4340 | if (err) | |
50460fe8 | 4341 | goto failed_mount3a; |
bc98a42c | 4342 | } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && |
e2b911c5 | 4343 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
4344 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
4345 | "suppressed and not mounted read-only"); | |
744692dc | 4346 | goto failed_mount_wq; |
ac27a0ec | 4347 | } else { |
1e381f60 DM |
4348 | /* Nojournal mode, all journal mount options are illegal */ |
4349 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
4350 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4351 | "journal_checksum, fs mounted w/o journal"); | |
4352 | goto failed_mount_wq; | |
4353 | } | |
4354 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4355 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4356 | "journal_async_commit, fs mounted w/o journal"); | |
4357 | goto failed_mount_wq; | |
4358 | } | |
4359 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
4360 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4361 | "commit=%lu, fs mounted w/o journal", | |
4362 | sbi->s_commit_interval / HZ); | |
4363 | goto failed_mount_wq; | |
4364 | } | |
4365 | if (EXT4_MOUNT_DATA_FLAGS & | |
4366 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
4367 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4368 | "data=, fs mounted w/o journal"); | |
4369 | goto failed_mount_wq; | |
4370 | } | |
50b29d8f | 4371 | sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; |
1e381f60 | 4372 | clear_opt(sb, JOURNAL_CHECKSUM); |
fd8c37ec | 4373 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
4374 | sbi->s_journal = NULL; |
4375 | needs_recovery = 0; | |
4376 | goto no_journal; | |
ac27a0ec DK |
4377 | } |
4378 | ||
e2b911c5 | 4379 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
4380 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
4381 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 4382 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 4383 | goto failed_mount_wq; |
eb40a09c JS |
4384 | } |
4385 | ||
25ed6e8a DW |
4386 | if (!set_journal_csum_feature_set(sb)) { |
4387 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
4388 | "feature set"); | |
4389 | goto failed_mount_wq; | |
d4da6c9c | 4390 | } |
818d276c | 4391 | |
ac27a0ec DK |
4392 | /* We have now updated the journal if required, so we can |
4393 | * validate the data journaling mode. */ | |
4394 | switch (test_opt(sb, DATA_FLAGS)) { | |
4395 | case 0: | |
4396 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
4397 | * capabilities: ORDERED_DATA if the journal can |
4398 | * cope, else JOURNAL_DATA | |
4399 | */ | |
dab291af | 4400 | if (jbd2_journal_check_available_features |
27f394a7 | 4401 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { |
fd8c37ec | 4402 | set_opt(sb, ORDERED_DATA); |
27f394a7 TN |
4403 | sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; |
4404 | } else { | |
fd8c37ec | 4405 | set_opt(sb, JOURNAL_DATA); |
27f394a7 TN |
4406 | sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; |
4407 | } | |
ac27a0ec DK |
4408 | break; |
4409 | ||
617ba13b MC |
4410 | case EXT4_MOUNT_ORDERED_DATA: |
4411 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
4412 | if (!jbd2_journal_check_available_features |
4413 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
4414 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
4415 | "requested data journaling mode"); | |
744692dc | 4416 | goto failed_mount_wq; |
ac27a0ec DK |
4417 | } |
4418 | default: | |
4419 | break; | |
4420 | } | |
ab04df78 JK |
4421 | |
4422 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && | |
4423 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4424 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4425 | "journal_async_commit in data=ordered mode"); | |
4426 | goto failed_mount_wq; | |
4427 | } | |
4428 | ||
b3881f74 | 4429 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 4430 | |
18aadd47 BJ |
4431 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
4432 | ||
ce7e010a | 4433 | no_journal: |
cdb7ee4c TE |
4434 | if (!test_opt(sb, NO_MBCACHE)) { |
4435 | sbi->s_ea_block_cache = ext4_xattr_create_cache(); | |
4436 | if (!sbi->s_ea_block_cache) { | |
dec214d0 | 4437 | ext4_msg(sb, KERN_ERR, |
cdb7ee4c | 4438 | "Failed to create ea_block_cache"); |
dec214d0 TE |
4439 | goto failed_mount_wq; |
4440 | } | |
cdb7ee4c TE |
4441 | |
4442 | if (ext4_has_feature_ea_inode(sb)) { | |
4443 | sbi->s_ea_inode_cache = ext4_xattr_create_cache(); | |
4444 | if (!sbi->s_ea_inode_cache) { | |
4445 | ext4_msg(sb, KERN_ERR, | |
4446 | "Failed to create ea_inode_cache"); | |
4447 | goto failed_mount_wq; | |
4448 | } | |
4449 | } | |
9c191f70 M |
4450 | } |
4451 | ||
e2b911c5 | 4452 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
09cbfeaf | 4453 | (blocksize != PAGE_SIZE)) { |
1cb767cd TT |
4454 | ext4_msg(sb, KERN_ERR, |
4455 | "Unsupported blocksize for fs encryption"); | |
4456 | goto failed_mount_wq; | |
4457 | } | |
4458 | ||
bc98a42c | 4459 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && |
e2b911c5 DW |
4460 | !ext4_has_feature_encrypt(sb)) { |
4461 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
4462 | ext4_commit_super(sb, 1); |
4463 | } | |
4464 | ||
952fc18e TT |
4465 | /* |
4466 | * Get the # of file system overhead blocks from the | |
4467 | * superblock if present. | |
4468 | */ | |
4469 | if (es->s_overhead_clusters) | |
4470 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
4471 | else { | |
07aa2ea1 LC |
4472 | err = ext4_calculate_overhead(sb); |
4473 | if (err) | |
952fc18e TT |
4474 | goto failed_mount_wq; |
4475 | } | |
4476 | ||
fd89d5f2 TH |
4477 | /* |
4478 | * The maximum number of concurrent works can be high and | |
4479 | * concurrency isn't really necessary. Limit it to 1. | |
4480 | */ | |
2e8fa54e JK |
4481 | EXT4_SB(sb)->rsv_conversion_wq = |
4482 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
4483 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
4484 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 4485 | ret = -ENOMEM; |
2e8fa54e JK |
4486 | goto failed_mount4; |
4487 | } | |
4488 | ||
ac27a0ec | 4489 | /* |
dab291af | 4490 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
4491 | * so we can safely mount the rest of the filesystem now. |
4492 | */ | |
4493 | ||
8a363970 | 4494 | root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); |
1d1fe1ee | 4495 | if (IS_ERR(root)) { |
b31e1552 | 4496 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 4497 | ret = PTR_ERR(root); |
32a9bb57 | 4498 | root = NULL; |
ac27a0ec DK |
4499 | goto failed_mount4; |
4500 | } | |
4501 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4502 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4503 | iput(root); |
ac27a0ec DK |
4504 | goto failed_mount4; |
4505 | } | |
b886ee3e GKB |
4506 | |
4507 | #ifdef CONFIG_UNICODE | |
4508 | if (sbi->s_encoding) | |
4509 | sb->s_d_op = &ext4_dentry_ops; | |
4510 | #endif | |
4511 | ||
48fde701 | 4512 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4513 | if (!sb->s_root) { |
b31e1552 | 4514 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4515 | ret = -ENOMEM; |
4516 | goto failed_mount4; | |
4517 | } | |
ac27a0ec | 4518 | |
c89128a0 JK |
4519 | ret = ext4_setup_super(sb, es, sb_rdonly(sb)); |
4520 | if (ret == -EROFS) { | |
1751e8a6 | 4521 | sb->s_flags |= SB_RDONLY; |
c89128a0 JK |
4522 | ret = 0; |
4523 | } else if (ret) | |
4524 | goto failed_mount4a; | |
ef7f3835 | 4525 | |
7bc04c5c | 4526 | ext4_clamp_want_extra_isize(sb); |
ef7f3835 | 4527 | |
b5799018 | 4528 | ext4_set_resv_clusters(sb); |
27dd4385 | 4529 | |
6fd058f7 TT |
4530 | err = ext4_setup_system_zone(sb); |
4531 | if (err) { | |
b31e1552 | 4532 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4533 | "zone (%d)", err); |
f9ae9cf5 TT |
4534 | goto failed_mount4a; |
4535 | } | |
4536 | ||
4537 | ext4_ext_init(sb); | |
4538 | err = ext4_mb_init(sb); | |
4539 | if (err) { | |
4540 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
4541 | err); | |
dcf2d804 | 4542 | goto failed_mount5; |
c2774d84 AK |
4543 | } |
4544 | ||
d5e03cbb TT |
4545 | block = ext4_count_free_clusters(sb); |
4546 | ext4_free_blocks_count_set(sbi->s_es, | |
4547 | EXT4_C2B(sbi, block)); | |
4274f516 | 4548 | ext4_superblock_csum_set(sb); |
908c7f19 TH |
4549 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
4550 | GFP_KERNEL); | |
d5e03cbb TT |
4551 | if (!err) { |
4552 | unsigned long freei = ext4_count_free_inodes(sb); | |
4553 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
4274f516 | 4554 | ext4_superblock_csum_set(sb); |
908c7f19 TH |
4555 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
4556 | GFP_KERNEL); | |
d5e03cbb TT |
4557 | } |
4558 | if (!err) | |
4559 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 4560 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 4561 | if (!err) |
908c7f19 TH |
4562 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
4563 | GFP_KERNEL); | |
c8585c6f DJ |
4564 | if (!err) |
4565 | err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); | |
4566 | ||
d5e03cbb TT |
4567 | if (err) { |
4568 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
4569 | goto failed_mount6; | |
4570 | } | |
4571 | ||
e2b911c5 | 4572 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
4573 | if (!ext4_fill_flex_info(sb)) { |
4574 | ext4_msg(sb, KERN_ERR, | |
4575 | "unable to initialize " | |
4576 | "flex_bg meta info!"); | |
4577 | goto failed_mount6; | |
4578 | } | |
4579 | ||
bfff6873 LC |
4580 | err = ext4_register_li_request(sb, first_not_zeroed); |
4581 | if (err) | |
dcf2d804 | 4582 | goto failed_mount6; |
bfff6873 | 4583 | |
b5799018 | 4584 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
4585 | if (err) |
4586 | goto failed_mount7; | |
3197ebdb | 4587 | |
9b2ff357 JK |
4588 | #ifdef CONFIG_QUOTA |
4589 | /* Enable quota usage during mount. */ | |
bc98a42c | 4590 | if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { |
9b2ff357 JK |
4591 | err = ext4_enable_quotas(sb); |
4592 | if (err) | |
4593 | goto failed_mount8; | |
4594 | } | |
4595 | #endif /* CONFIG_QUOTA */ | |
4596 | ||
617ba13b MC |
4597 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4598 | ext4_orphan_cleanup(sb, es); | |
4599 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4600 | if (needs_recovery) { |
b31e1552 | 4601 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4602 | ext4_mark_recovery_complete(sb, es); |
4603 | } | |
4604 | if (EXT4_SB(sb)->s_journal) { | |
4605 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4606 | descr = " journalled data mode"; | |
4607 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4608 | descr = " ordered data mode"; | |
4609 | else | |
4610 | descr = " writeback data mode"; | |
4611 | } else | |
4612 | descr = "out journal"; | |
4613 | ||
79add3a3 LC |
4614 | if (test_opt(sb, DISCARD)) { |
4615 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4616 | if (!blk_queue_discard(q)) | |
4617 | ext4_msg(sb, KERN_WARNING, | |
4618 | "mounting with \"discard\" option, but " | |
4619 | "the device does not support discard"); | |
4620 | } | |
4621 | ||
e294a537 TT |
4622 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
4623 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
5aee0f8a TT |
4624 | "Opts: %.*s%s%s", descr, |
4625 | (int) sizeof(sbi->s_es->s_mount_opts), | |
4626 | sbi->s_es->s_mount_opts, | |
e294a537 | 4627 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
ac27a0ec | 4628 | |
66e61a9e TT |
4629 | if (es->s_error_count) |
4630 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4631 | |
efbed4dc TT |
4632 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
4633 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
4634 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
4635 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
4636 | ||
d4c402d9 | 4637 | kfree(orig_data); |
ac27a0ec DK |
4638 | return 0; |
4639 | ||
617ba13b | 4640 | cantfind_ext4: |
ac27a0ec | 4641 | if (!silent) |
b31e1552 | 4642 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4643 | goto failed_mount; |
4644 | ||
72ba7450 TT |
4645 | #ifdef CONFIG_QUOTA |
4646 | failed_mount8: | |
ebd173be | 4647 | ext4_unregister_sysfs(sb); |
72ba7450 | 4648 | #endif |
dcf2d804 TM |
4649 | failed_mount7: |
4650 | ext4_unregister_li_request(sb); | |
4651 | failed_mount6: | |
f9ae9cf5 | 4652 | ext4_mb_release(sb); |
d5e03cbb | 4653 | if (sbi->s_flex_groups) |
b93b41d4 | 4654 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4655 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4656 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4657 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4658 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
af18e35b | 4659 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
00764937 | 4660 | failed_mount5: |
f9ae9cf5 TT |
4661 | ext4_ext_release(sb); |
4662 | ext4_release_system_zone(sb); | |
4663 | failed_mount4a: | |
94bf608a | 4664 | dput(sb->s_root); |
32a9bb57 | 4665 | sb->s_root = NULL; |
94bf608a | 4666 | failed_mount4: |
b31e1552 | 4667 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4668 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4669 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4670 | failed_mount_wq: |
50c15df6 CX |
4671 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); |
4672 | sbi->s_ea_inode_cache = NULL; | |
4673 | ||
4674 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
4675 | sbi->s_ea_block_cache = NULL; | |
4676 | ||
0390131b FM |
4677 | if (sbi->s_journal) { |
4678 | jbd2_journal_destroy(sbi->s_journal); | |
4679 | sbi->s_journal = NULL; | |
4680 | } | |
50460fe8 | 4681 | failed_mount3a: |
d3922a77 | 4682 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4683 | failed_mount3: |
9105bb14 | 4684 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4685 | if (sbi->s_mmp_tsk) |
4686 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4687 | failed_mount2: |
4688 | for (i = 0; i < db_count; i++) | |
4689 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4690 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4691 | failed_mount: |
0441984a DW |
4692 | if (sbi->s_chksum_driver) |
4693 | crypto_free_shash(sbi->s_chksum_driver); | |
c83ad55e GKB |
4694 | |
4695 | #ifdef CONFIG_UNICODE | |
4696 | utf8_unload(sbi->s_encoding); | |
4697 | #endif | |
4698 | ||
ac27a0ec | 4699 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4700 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
0ba33fac | 4701 | kfree(get_qf_name(sb, sbi, i)); |
ac27a0ec | 4702 | #endif |
617ba13b | 4703 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4704 | brelse(bh); |
4705 | out_fail: | |
0dcf2745 | 4706 | /* sb->s_user_ns will be put when sb is destroyed */ |
ac27a0ec | 4707 | sb->s_fs_info = NULL; |
f6830165 | 4708 | kfree(sbi->s_blockgroup_lock); |
5aee0f8a | 4709 | out_free_base: |
ac27a0ec | 4710 | kfree(sbi); |
d4c402d9 | 4711 | kfree(orig_data); |
5e405595 | 4712 | fs_put_dax(dax_dev); |
07aa2ea1 | 4713 | return err ? err : ret; |
ac27a0ec DK |
4714 | } |
4715 | ||
4716 | /* | |
4717 | * Setup any per-fs journal parameters now. We'll do this both on | |
4718 | * initial mount, once the journal has been initialised but before we've | |
4719 | * done any recovery; and again on any subsequent remount. | |
4720 | */ | |
617ba13b | 4721 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4722 | { |
617ba13b | 4723 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4724 | |
30773840 TT |
4725 | journal->j_commit_interval = sbi->s_commit_interval; |
4726 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4727 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4728 | |
a931da6a | 4729 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4730 | if (test_opt(sb, BARRIER)) |
dab291af | 4731 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4732 | else |
dab291af | 4733 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4734 | if (test_opt(sb, DATA_ERR_ABORT)) |
4735 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4736 | else | |
4737 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4738 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4739 | } |
4740 | ||
c6cb7e77 EW |
4741 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
4742 | unsigned int journal_inum) | |
ac27a0ec DK |
4743 | { |
4744 | struct inode *journal_inode; | |
ac27a0ec | 4745 | |
c6cb7e77 EW |
4746 | /* |
4747 | * Test for the existence of a valid inode on disk. Bad things | |
4748 | * happen if we iget() an unused inode, as the subsequent iput() | |
4749 | * will try to delete it. | |
4750 | */ | |
8a363970 | 4751 | journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); |
1d1fe1ee | 4752 | if (IS_ERR(journal_inode)) { |
b31e1552 | 4753 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4754 | return NULL; |
4755 | } | |
4756 | if (!journal_inode->i_nlink) { | |
4757 | make_bad_inode(journal_inode); | |
4758 | iput(journal_inode); | |
b31e1552 | 4759 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4760 | return NULL; |
4761 | } | |
4762 | ||
e5f8eab8 | 4763 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4764 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4765 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4766 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4767 | iput(journal_inode); |
4768 | return NULL; | |
4769 | } | |
c6cb7e77 EW |
4770 | return journal_inode; |
4771 | } | |
4772 | ||
4773 | static journal_t *ext4_get_journal(struct super_block *sb, | |
4774 | unsigned int journal_inum) | |
4775 | { | |
4776 | struct inode *journal_inode; | |
4777 | journal_t *journal; | |
4778 | ||
4779 | BUG_ON(!ext4_has_feature_journal(sb)); | |
4780 | ||
4781 | journal_inode = ext4_get_journal_inode(sb, journal_inum); | |
4782 | if (!journal_inode) | |
4783 | return NULL; | |
ac27a0ec | 4784 | |
dab291af | 4785 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4786 | if (!journal) { |
b31e1552 | 4787 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4788 | iput(journal_inode); |
4789 | return NULL; | |
4790 | } | |
4791 | journal->j_private = sb; | |
617ba13b | 4792 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4793 | return journal; |
4794 | } | |
4795 | ||
617ba13b | 4796 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4797 | dev_t j_dev) |
4798 | { | |
2b2d6d01 | 4799 | struct buffer_head *bh; |
ac27a0ec | 4800 | journal_t *journal; |
617ba13b MC |
4801 | ext4_fsblk_t start; |
4802 | ext4_fsblk_t len; | |
ac27a0ec | 4803 | int hblock, blocksize; |
617ba13b | 4804 | ext4_fsblk_t sb_block; |
ac27a0ec | 4805 | unsigned long offset; |
2b2d6d01 | 4806 | struct ext4_super_block *es; |
ac27a0ec DK |
4807 | struct block_device *bdev; |
4808 | ||
e2b911c5 | 4809 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4810 | |
b31e1552 | 4811 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4812 | if (bdev == NULL) |
4813 | return NULL; | |
4814 | ||
ac27a0ec | 4815 | blocksize = sb->s_blocksize; |
e1defc4f | 4816 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4817 | if (blocksize < hblock) { |
b31e1552 ES |
4818 | ext4_msg(sb, KERN_ERR, |
4819 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4820 | goto out_bdev; |
4821 | } | |
4822 | ||
617ba13b MC |
4823 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4824 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4825 | set_blocksize(bdev, blocksize); |
4826 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4827 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4828 | "external journal"); | |
ac27a0ec DK |
4829 | goto out_bdev; |
4830 | } | |
4831 | ||
2716b802 | 4832 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4833 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4834 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4835 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4836 | ext4_msg(sb, KERN_ERR, "external journal has " |
4837 | "bad superblock"); | |
ac27a0ec DK |
4838 | brelse(bh); |
4839 | goto out_bdev; | |
4840 | } | |
4841 | ||
df4763be DW |
4842 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4843 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4844 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4845 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4846 | "corrupt superblock"); | |
4847 | brelse(bh); | |
4848 | goto out_bdev; | |
4849 | } | |
4850 | ||
617ba13b | 4851 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4852 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4853 | brelse(bh); |
4854 | goto out_bdev; | |
4855 | } | |
4856 | ||
bd81d8ee | 4857 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4858 | start = sb_block + 1; |
4859 | brelse(bh); /* we're done with the superblock */ | |
4860 | ||
dab291af | 4861 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4862 | start, len, blocksize); |
4863 | if (!journal) { | |
b31e1552 | 4864 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4865 | goto out_bdev; |
4866 | } | |
4867 | journal->j_private = sb; | |
dfec8a14 | 4868 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4869 | wait_on_buffer(journal->j_sb_buffer); |
4870 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4871 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4872 | goto out_journal; |
4873 | } | |
4874 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4875 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4876 | "user (unsupported) - %d", | |
ac27a0ec DK |
4877 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4878 | goto out_journal; | |
4879 | } | |
617ba13b MC |
4880 | EXT4_SB(sb)->journal_bdev = bdev; |
4881 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4882 | return journal; |
0b8e58a1 | 4883 | |
ac27a0ec | 4884 | out_journal: |
dab291af | 4885 | jbd2_journal_destroy(journal); |
ac27a0ec | 4886 | out_bdev: |
617ba13b | 4887 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4888 | return NULL; |
4889 | } | |
4890 | ||
617ba13b MC |
4891 | static int ext4_load_journal(struct super_block *sb, |
4892 | struct ext4_super_block *es, | |
ac27a0ec DK |
4893 | unsigned long journal_devnum) |
4894 | { | |
4895 | journal_t *journal; | |
4896 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4897 | dev_t journal_dev; | |
4898 | int err = 0; | |
4899 | int really_read_only; | |
4900 | ||
e2b911c5 | 4901 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4902 | |
ac27a0ec DK |
4903 | if (journal_devnum && |
4904 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4905 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4906 | "numbers have changed"); | |
ac27a0ec DK |
4907 | journal_dev = new_decode_dev(journal_devnum); |
4908 | } else | |
4909 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4910 | ||
4911 | really_read_only = bdev_read_only(sb->s_bdev); | |
4912 | ||
4913 | /* | |
4914 | * Are we loading a blank journal or performing recovery after a | |
4915 | * crash? For recovery, we need to check in advance whether we | |
4916 | * can get read-write access to the device. | |
4917 | */ | |
e2b911c5 | 4918 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
bc98a42c | 4919 | if (sb_rdonly(sb)) { |
b31e1552 ES |
4920 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4921 | "required on readonly filesystem"); | |
ac27a0ec | 4922 | if (really_read_only) { |
b31e1552 | 4923 | ext4_msg(sb, KERN_ERR, "write access " |
d98bf8cd SR |
4924 | "unavailable, cannot proceed " |
4925 | "(try mounting with noload)"); | |
ac27a0ec DK |
4926 | return -EROFS; |
4927 | } | |
b31e1552 ES |
4928 | ext4_msg(sb, KERN_INFO, "write access will " |
4929 | "be enabled during recovery"); | |
ac27a0ec DK |
4930 | } |
4931 | } | |
4932 | ||
4933 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4934 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4935 | "and inode journals!"); | |
ac27a0ec DK |
4936 | return -EINVAL; |
4937 | } | |
4938 | ||
4939 | if (journal_inum) { | |
617ba13b | 4940 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4941 | return -EINVAL; |
4942 | } else { | |
617ba13b | 4943 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4944 | return -EINVAL; |
4945 | } | |
4946 | ||
90576c0b | 4947 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4948 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4949 | |
e2b911c5 | 4950 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4951 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4952 | if (!err) { |
4953 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4954 | if (save) | |
4955 | memcpy(save, ((char *) es) + | |
4956 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4957 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4958 | if (save) |
4959 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4960 | save, EXT4_S_ERR_LEN); | |
4961 | kfree(save); | |
4962 | } | |
ac27a0ec DK |
4963 | |
4964 | if (err) { | |
b31e1552 | 4965 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4966 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4967 | return err; |
4968 | } | |
4969 | ||
617ba13b MC |
4970 | EXT4_SB(sb)->s_journal = journal; |
4971 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4972 | |
c41303ce | 4973 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4974 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4975 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4976 | |
4977 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4978 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4979 | } |
4980 | ||
4981 | return 0; | |
4982 | } | |
4983 | ||
e2d67052 | 4984 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4985 | { |
e2d67052 | 4986 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4987 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4988 | int error = 0; |
ac27a0ec | 4989 | |
bdfe0cbd | 4990 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4991 | return error; |
a17712c8 JD |
4992 | |
4993 | /* | |
4994 | * The superblock bh should be mapped, but it might not be if the | |
4995 | * device was hot-removed. Not much we can do but fail the I/O. | |
4996 | */ | |
4997 | if (!buffer_mapped(sbh)) | |
4998 | return error; | |
4999 | ||
71290b36 TT |
5000 | /* |
5001 | * If the file system is mounted read-only, don't update the | |
5002 | * superblock write time. This avoids updating the superblock | |
5003 | * write time when we are mounting the root file system | |
5004 | * read/only but we need to replay the journal; at that point, | |
5005 | * for people who are east of GMT and who make their clock | |
5006 | * tick in localtime for Windows bug-for-bug compatibility, | |
5007 | * the clock is set in the future, and this will cause e2fsck | |
5008 | * to complain and force a full file system check. | |
5009 | */ | |
1751e8a6 | 5010 | if (!(sb->s_flags & SB_RDONLY)) |
6a0678a7 | 5011 | ext4_update_tstamp(es, s_wtime); |
f613dfcb TT |
5012 | if (sb->s_bdev->bd_part) |
5013 | es->s_kbytes_written = | |
5014 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
dbae2c55 MC |
5015 | ((part_stat_read(sb->s_bdev->bd_part, |
5016 | sectors[STAT_WRITE]) - | |
afc32f7e | 5017 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); |
f613dfcb TT |
5018 | else |
5019 | es->s_kbytes_written = | |
5020 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
5021 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
5022 | ext4_free_blocks_count_set(es, | |
57042651 TT |
5023 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
5024 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
5025 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
5026 | es->s_free_inodes_count = | |
5027 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 5028 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 5029 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 5030 | ext4_superblock_csum_set(sb); |
1566a48a TT |
5031 | if (sync) |
5032 | lock_buffer(sbh); | |
e8680786 | 5033 | if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { |
4743f839 PKS |
5034 | /* |
5035 | * Oh, dear. A previous attempt to write the | |
5036 | * superblock failed. This could happen because the | |
5037 | * USB device was yanked out. Or it could happen to | |
5038 | * be a transient write error and maybe the block will | |
5039 | * be remapped. Nothing we can do but to retry the | |
5040 | * write and hope for the best. | |
5041 | */ | |
5042 | ext4_msg(sb, KERN_ERR, "previous I/O error to " | |
5043 | "superblock detected"); | |
5044 | clear_buffer_write_io_error(sbh); | |
5045 | set_buffer_uptodate(sbh); | |
5046 | } | |
ac27a0ec | 5047 | mark_buffer_dirty(sbh); |
914258bf | 5048 | if (sync) { |
1566a48a | 5049 | unlock_buffer(sbh); |
564bc402 | 5050 | error = __sync_dirty_buffer(sbh, |
00473374 | 5051 | REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); |
c89128a0 | 5052 | if (buffer_write_io_error(sbh)) { |
b31e1552 ES |
5053 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
5054 | "superblock"); | |
914258bf TT |
5055 | clear_buffer_write_io_error(sbh); |
5056 | set_buffer_uptodate(sbh); | |
5057 | } | |
5058 | } | |
c4be0c1d | 5059 | return error; |
ac27a0ec DK |
5060 | } |
5061 | ||
ac27a0ec DK |
5062 | /* |
5063 | * Have we just finished recovery? If so, and if we are mounting (or | |
5064 | * remounting) the filesystem readonly, then we will end up with a | |
5065 | * consistent fs on disk. Record that fact. | |
5066 | */ | |
2b2d6d01 TT |
5067 | static void ext4_mark_recovery_complete(struct super_block *sb, |
5068 | struct ext4_super_block *es) | |
ac27a0ec | 5069 | { |
617ba13b | 5070 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 5071 | |
e2b911c5 | 5072 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
5073 | BUG_ON(journal != NULL); |
5074 | return; | |
5075 | } | |
dab291af | 5076 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
5077 | if (jbd2_journal_flush(journal) < 0) |
5078 | goto out; | |
5079 | ||
bc98a42c | 5080 | if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { |
e2b911c5 | 5081 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 5082 | ext4_commit_super(sb, 1); |
ac27a0ec | 5083 | } |
7ffe1ea8 HK |
5084 | |
5085 | out: | |
dab291af | 5086 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
5087 | } |
5088 | ||
5089 | /* | |
5090 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
5091 | * has recorded an error from a previous lifetime, move that error to the | |
5092 | * main filesystem now. | |
5093 | */ | |
2b2d6d01 TT |
5094 | static void ext4_clear_journal_err(struct super_block *sb, |
5095 | struct ext4_super_block *es) | |
ac27a0ec DK |
5096 | { |
5097 | journal_t *journal; | |
5098 | int j_errno; | |
5099 | const char *errstr; | |
5100 | ||
e2b911c5 | 5101 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 5102 | |
617ba13b | 5103 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
5104 | |
5105 | /* | |
5106 | * Now check for any error status which may have been recorded in the | |
617ba13b | 5107 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
5108 | */ |
5109 | ||
dab291af | 5110 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
5111 | if (j_errno) { |
5112 | char nbuf[16]; | |
5113 | ||
617ba13b | 5114 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 5115 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 5116 | "from previous mount: %s", errstr); |
12062ddd | 5117 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 5118 | |
617ba13b MC |
5119 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
5120 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 5121 | ext4_commit_super(sb, 1); |
ac27a0ec | 5122 | |
dab291af | 5123 | jbd2_journal_clear_err(journal); |
d796c52e | 5124 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
5125 | } |
5126 | } | |
5127 | ||
5128 | /* | |
5129 | * Force the running and committing transactions to commit, | |
5130 | * and wait on the commit. | |
5131 | */ | |
617ba13b | 5132 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
5133 | { |
5134 | journal_t *journal; | |
ac27a0ec | 5135 | |
bc98a42c | 5136 | if (sb_rdonly(sb)) |
ac27a0ec DK |
5137 | return 0; |
5138 | ||
617ba13b | 5139 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 5140 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
5141 | } |
5142 | ||
617ba13b | 5143 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 5144 | { |
14ce0cb4 | 5145 | int ret = 0; |
9eddacf9 | 5146 | tid_t target; |
06a407f1 | 5147 | bool needs_barrier = false; |
8d5d02e6 | 5148 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 5149 | |
49598e04 | 5150 | if (unlikely(ext4_forced_shutdown(sbi))) |
0db1ff22 TT |
5151 | return 0; |
5152 | ||
9bffad1e | 5153 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 5154 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
5155 | /* |
5156 | * Writeback quota in non-journalled quota case - journalled quota has | |
5157 | * no dirty dquots | |
5158 | */ | |
5159 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
5160 | /* |
5161 | * Data writeback is possible w/o journal transaction, so barrier must | |
5162 | * being sent at the end of the function. But we can skip it if | |
5163 | * transaction_commit will do it for us. | |
5164 | */ | |
bda32530 TT |
5165 | if (sbi->s_journal) { |
5166 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
5167 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
5168 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
5169 | needs_barrier = true; | |
5170 | ||
5171 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
5172 | if (wait) | |
5173 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
5174 | target); | |
5175 | } | |
5176 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 5177 | needs_barrier = true; |
06a407f1 DM |
5178 | if (needs_barrier) { |
5179 | int err; | |
5180 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
5181 | if (!ret) | |
5182 | ret = err; | |
0390131b | 5183 | } |
06a407f1 DM |
5184 | |
5185 | return ret; | |
5186 | } | |
5187 | ||
ac27a0ec DK |
5188 | /* |
5189 | * LVM calls this function before a (read-only) snapshot is created. This | |
5190 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
5191 | * |
5192 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
5193 | * state independently. It relies on upper layer to stop all data & metadata |
5194 | * modifications. | |
ac27a0ec | 5195 | */ |
c4be0c1d | 5196 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 5197 | { |
c4be0c1d TS |
5198 | int error = 0; |
5199 | journal_t *journal; | |
ac27a0ec | 5200 | |
bc98a42c | 5201 | if (sb_rdonly(sb)) |
9ca92389 | 5202 | return 0; |
ac27a0ec | 5203 | |
9ca92389 | 5204 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 5205 | |
bb044576 TT |
5206 | if (journal) { |
5207 | /* Now we set up the journal barrier. */ | |
5208 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 5209 | |
bb044576 TT |
5210 | /* |
5211 | * Don't clear the needs_recovery flag if we failed to | |
5212 | * flush the journal. | |
5213 | */ | |
5214 | error = jbd2_journal_flush(journal); | |
5215 | if (error < 0) | |
5216 | goto out; | |
c642dc9e ES |
5217 | |
5218 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 5219 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 5220 | } |
9ca92389 | 5221 | |
9ca92389 | 5222 | error = ext4_commit_super(sb, 1); |
6b0310fb | 5223 | out: |
bb044576 TT |
5224 | if (journal) |
5225 | /* we rely on upper layer to stop further updates */ | |
5226 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 5227 | return error; |
ac27a0ec DK |
5228 | } |
5229 | ||
5230 | /* | |
5231 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
5232 | * flag here, even though the filesystem is not technically dirty yet. | |
5233 | */ | |
c4be0c1d | 5234 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 5235 | { |
bc98a42c | 5236 | if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) |
9ca92389 TT |
5237 | return 0; |
5238 | ||
c642dc9e ES |
5239 | if (EXT4_SB(sb)->s_journal) { |
5240 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 5241 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
5242 | } |
5243 | ||
9ca92389 | 5244 | ext4_commit_super(sb, 1); |
c4be0c1d | 5245 | return 0; |
ac27a0ec DK |
5246 | } |
5247 | ||
673c6100 TT |
5248 | /* |
5249 | * Structure to save mount options for ext4_remount's benefit | |
5250 | */ | |
5251 | struct ext4_mount_options { | |
5252 | unsigned long s_mount_opt; | |
a2595b8a | 5253 | unsigned long s_mount_opt2; |
08cefc7a EB |
5254 | kuid_t s_resuid; |
5255 | kgid_t s_resgid; | |
673c6100 TT |
5256 | unsigned long s_commit_interval; |
5257 | u32 s_min_batch_time, s_max_batch_time; | |
5258 | #ifdef CONFIG_QUOTA | |
5259 | int s_jquota_fmt; | |
a2d4a646 | 5260 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
5261 | #endif |
5262 | }; | |
5263 | ||
2b2d6d01 | 5264 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 5265 | { |
2b2d6d01 | 5266 | struct ext4_super_block *es; |
617ba13b | 5267 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 5268 | unsigned long old_sb_flags; |
617ba13b | 5269 | struct ext4_mount_options old_opts; |
c79d967d | 5270 | int enable_quota = 0; |
8a266467 | 5271 | ext4_group_t g; |
b3881f74 | 5272 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 5273 | int err = 0; |
ac27a0ec | 5274 | #ifdef CONFIG_QUOTA |
03dafb5f | 5275 | int i, j; |
33458eab | 5276 | char *to_free[EXT4_MAXQUOTAS]; |
ac27a0ec | 5277 | #endif |
d4c402d9 | 5278 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec | 5279 | |
21ac738e CX |
5280 | if (data && !orig_data) |
5281 | return -ENOMEM; | |
5282 | ||
ac27a0ec DK |
5283 | /* Store the original options */ |
5284 | old_sb_flags = sb->s_flags; | |
5285 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 5286 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
5287 | old_opts.s_resuid = sbi->s_resuid; |
5288 | old_opts.s_resgid = sbi->s_resgid; | |
5289 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
5290 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
5291 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
5292 | #ifdef CONFIG_QUOTA |
5293 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 5294 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 5295 | if (sbi->s_qf_names[i]) { |
33458eab TT |
5296 | char *qf_name = get_qf_name(sb, sbi, i); |
5297 | ||
5298 | old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); | |
03dafb5f CG |
5299 | if (!old_opts.s_qf_names[i]) { |
5300 | for (j = 0; j < i; j++) | |
5301 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 5302 | kfree(orig_data); |
03dafb5f CG |
5303 | return -ENOMEM; |
5304 | } | |
5305 | } else | |
5306 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 5307 | #endif |
b3881f74 TT |
5308 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
5309 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 5310 | |
661aa520 | 5311 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
5312 | err = -EINVAL; |
5313 | goto restore_opts; | |
5314 | } | |
5315 | ||
7bc04c5c BR |
5316 | ext4_clamp_want_extra_isize(sb); |
5317 | ||
6b992ff2 | 5318 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
5319 | test_opt(sb, JOURNAL_CHECKSUM)) { |
5320 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
5321 | "during remount not supported; ignoring"); |
5322 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
5323 | } |
5324 | ||
6ae6514b PS |
5325 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
5326 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
5327 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5328 | "both data=journal and delalloc"); | |
5329 | err = -EINVAL; | |
5330 | goto restore_opts; | |
5331 | } | |
5332 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
5333 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5334 | "both data=journal and dioread_nolock"); | |
5335 | err = -EINVAL; | |
5336 | goto restore_opts; | |
5337 | } | |
923ae0ff RZ |
5338 | if (test_opt(sb, DAX)) { |
5339 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5340 | "both data=journal and dax"); | |
5341 | err = -EINVAL; | |
5342 | goto restore_opts; | |
5343 | } | |
ab04df78 JK |
5344 | } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { |
5345 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
5346 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5347 | "journal_async_commit in data=ordered mode"); | |
5348 | err = -EINVAL; | |
5349 | goto restore_opts; | |
5350 | } | |
923ae0ff RZ |
5351 | } |
5352 | ||
cdb7ee4c TE |
5353 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { |
5354 | ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); | |
5355 | err = -EINVAL; | |
5356 | goto restore_opts; | |
5357 | } | |
5358 | ||
923ae0ff RZ |
5359 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { |
5360 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
5361 | "dax flag with busy inodes while remounting"); | |
5362 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
5363 | } |
5364 | ||
4ab2f15b | 5365 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 5366 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec | 5367 | |
1751e8a6 LT |
5368 | sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | |
5369 | (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); | |
ac27a0ec DK |
5370 | |
5371 | es = sbi->s_es; | |
5372 | ||
b3881f74 | 5373 | if (sbi->s_journal) { |
0390131b | 5374 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
5375 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
5376 | } | |
ac27a0ec | 5377 | |
1751e8a6 LT |
5378 | if (*flags & SB_LAZYTIME) |
5379 | sb->s_flags |= SB_LAZYTIME; | |
a2fd66d0 | 5380 | |
1751e8a6 | 5381 | if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { |
4ab2f15b | 5382 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
5383 | err = -EROFS; |
5384 | goto restore_opts; | |
5385 | } | |
5386 | ||
1751e8a6 | 5387 | if (*flags & SB_RDONLY) { |
38c03b34 TT |
5388 | err = sync_filesystem(sb); |
5389 | if (err < 0) | |
5390 | goto restore_opts; | |
0f0dd62f CH |
5391 | err = dquot_suspend(sb, -1); |
5392 | if (err < 0) | |
c79d967d | 5393 | goto restore_opts; |
c79d967d | 5394 | |
ac27a0ec DK |
5395 | /* |
5396 | * First of all, the unconditional stuff we have to do | |
5397 | * to disable replay of the journal when we next remount | |
5398 | */ | |
1751e8a6 | 5399 | sb->s_flags |= SB_RDONLY; |
ac27a0ec DK |
5400 | |
5401 | /* | |
5402 | * OK, test if we are remounting a valid rw partition | |
5403 | * readonly, and if so set the rdonly flag and then | |
5404 | * mark the partition as valid again. | |
5405 | */ | |
617ba13b MC |
5406 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
5407 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
5408 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
5409 | ||
a63c9eb2 | 5410 | if (sbi->s_journal) |
0390131b | 5411 | ext4_mark_recovery_complete(sb, es); |
2dca60d9 TT |
5412 | if (sbi->s_mmp_tsk) |
5413 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 5414 | } else { |
a13fb1a4 | 5415 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 5416 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 5417 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
5418 | err = -EROFS; |
5419 | goto restore_opts; | |
5420 | } | |
8a266467 TT |
5421 | /* |
5422 | * Make sure the group descriptor checksums | |
0b8e58a1 | 5423 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
5424 | */ |
5425 | for (g = 0; g < sbi->s_groups_count; g++) { | |
5426 | struct ext4_group_desc *gdp = | |
5427 | ext4_get_group_desc(sb, g, NULL); | |
5428 | ||
feb0ab32 | 5429 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
5430 | ext4_msg(sb, KERN_ERR, |
5431 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 5432 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 5433 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 5434 | err = -EFSBADCRC; |
8a266467 TT |
5435 | goto restore_opts; |
5436 | } | |
5437 | } | |
5438 | ||
ead6596b ES |
5439 | /* |
5440 | * If we have an unprocessed orphan list hanging | |
5441 | * around from a previously readonly bdev mount, | |
5442 | * require a full umount/remount for now. | |
5443 | */ | |
5444 | if (es->s_last_orphan) { | |
b31e1552 | 5445 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
5446 | "remount RDWR because of unprocessed " |
5447 | "orphan inode list. Please " | |
b31e1552 | 5448 | "umount/remount instead"); |
ead6596b ES |
5449 | err = -EINVAL; |
5450 | goto restore_opts; | |
5451 | } | |
5452 | ||
ac27a0ec DK |
5453 | /* |
5454 | * Mounting a RDONLY partition read-write, so reread | |
5455 | * and store the current valid flag. (It may have | |
5456 | * been changed by e2fsck since we originally mounted | |
5457 | * the partition.) | |
5458 | */ | |
0390131b FM |
5459 | if (sbi->s_journal) |
5460 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 5461 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
c89128a0 JK |
5462 | |
5463 | err = ext4_setup_super(sb, es, 0); | |
5464 | if (err) | |
5465 | goto restore_opts; | |
5466 | ||
5467 | sb->s_flags &= ~SB_RDONLY; | |
e2b911c5 | 5468 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
5469 | if (ext4_multi_mount_protect(sb, |
5470 | le64_to_cpu(es->s_mmp_block))) { | |
5471 | err = -EROFS; | |
5472 | goto restore_opts; | |
5473 | } | |
c79d967d | 5474 | enable_quota = 1; |
ac27a0ec DK |
5475 | } |
5476 | } | |
bfff6873 LC |
5477 | |
5478 | /* | |
5479 | * Reinitialize lazy itable initialization thread based on | |
5480 | * current settings | |
5481 | */ | |
bc98a42c | 5482 | if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) |
bfff6873 LC |
5483 | ext4_unregister_li_request(sb); |
5484 | else { | |
5485 | ext4_group_t first_not_zeroed; | |
5486 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
5487 | ext4_register_li_request(sb, first_not_zeroed); | |
5488 | } | |
5489 | ||
6fd058f7 | 5490 | ext4_setup_system_zone(sb); |
c89128a0 JK |
5491 | if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { |
5492 | err = ext4_commit_super(sb, 1); | |
5493 | if (err) | |
5494 | goto restore_opts; | |
5495 | } | |
0390131b | 5496 | |
ac27a0ec DK |
5497 | #ifdef CONFIG_QUOTA |
5498 | /* Release old quota file names */ | |
a2d4a646 | 5499 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 5500 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
5501 | if (enable_quota) { |
5502 | if (sb_any_quota_suspended(sb)) | |
5503 | dquot_resume(sb, -1); | |
e2b911c5 | 5504 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 5505 | err = ext4_enable_quotas(sb); |
07724f98 | 5506 | if (err) |
7c319d32 | 5507 | goto restore_opts; |
7c319d32 AK |
5508 | } |
5509 | } | |
ac27a0ec | 5510 | #endif |
d4c402d9 | 5511 | |
1751e8a6 | 5512 | *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); |
d4c402d9 CW |
5513 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
5514 | kfree(orig_data); | |
ac27a0ec | 5515 | return 0; |
0b8e58a1 | 5516 | |
ac27a0ec DK |
5517 | restore_opts: |
5518 | sb->s_flags = old_sb_flags; | |
5519 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 5520 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
5521 | sbi->s_resuid = old_opts.s_resuid; |
5522 | sbi->s_resgid = old_opts.s_resgid; | |
5523 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
5524 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
5525 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
5526 | #ifdef CONFIG_QUOTA |
5527 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 5528 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
33458eab TT |
5529 | to_free[i] = get_qf_name(sb, sbi, i); |
5530 | rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); | |
ac27a0ec | 5531 | } |
33458eab TT |
5532 | synchronize_rcu(); |
5533 | for (i = 0; i < EXT4_MAXQUOTAS; i++) | |
5534 | kfree(to_free[i]); | |
ac27a0ec | 5535 | #endif |
d4c402d9 | 5536 | kfree(orig_data); |
ac27a0ec DK |
5537 | return err; |
5538 | } | |
5539 | ||
689c958c LX |
5540 | #ifdef CONFIG_QUOTA |
5541 | static int ext4_statfs_project(struct super_block *sb, | |
5542 | kprojid_t projid, struct kstatfs *buf) | |
5543 | { | |
5544 | struct kqid qid; | |
5545 | struct dquot *dquot; | |
5546 | u64 limit; | |
5547 | u64 curblock; | |
5548 | ||
5549 | qid = make_kqid_projid(projid); | |
5550 | dquot = dqget(sb, qid); | |
5551 | if (IS_ERR(dquot)) | |
5552 | return PTR_ERR(dquot); | |
7b9ca4c6 | 5553 | spin_lock(&dquot->dq_dqb_lock); |
689c958c LX |
5554 | |
5555 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? | |
5556 | dquot->dq_dqb.dqb_bsoftlimit : | |
5557 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; | |
5558 | if (limit && buf->f_blocks > limit) { | |
f06925c7 KK |
5559 | curblock = (dquot->dq_dqb.dqb_curspace + |
5560 | dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; | |
689c958c LX |
5561 | buf->f_blocks = limit; |
5562 | buf->f_bfree = buf->f_bavail = | |
5563 | (buf->f_blocks > curblock) ? | |
5564 | (buf->f_blocks - curblock) : 0; | |
5565 | } | |
5566 | ||
5567 | limit = dquot->dq_dqb.dqb_isoftlimit ? | |
5568 | dquot->dq_dqb.dqb_isoftlimit : | |
5569 | dquot->dq_dqb.dqb_ihardlimit; | |
5570 | if (limit && buf->f_files > limit) { | |
5571 | buf->f_files = limit; | |
5572 | buf->f_ffree = | |
5573 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
5574 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
5575 | } | |
5576 | ||
7b9ca4c6 | 5577 | spin_unlock(&dquot->dq_dqb_lock); |
689c958c LX |
5578 | dqput(dquot); |
5579 | return 0; | |
5580 | } | |
5581 | #endif | |
5582 | ||
2b2d6d01 | 5583 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
5584 | { |
5585 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
5586 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
5587 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 5588 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 5589 | u64 fsid; |
d02a9391 | 5590 | s64 bfree; |
27dd4385 | 5591 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 5592 | |
952fc18e TT |
5593 | if (!test_opt(sb, MINIX_DF)) |
5594 | overhead = sbi->s_overhead; | |
ac27a0ec | 5595 | |
617ba13b | 5596 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 5597 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 5598 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
5599 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
5600 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 5601 | /* prevent underflow in case that few free space is available */ |
57042651 | 5602 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
5603 | buf->f_bavail = buf->f_bfree - |
5604 | (ext4_r_blocks_count(es) + resv_blocks); | |
5605 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
5606 | buf->f_bavail = 0; |
5607 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 5608 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 5609 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
5610 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
5611 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
5612 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
5613 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 5614 | |
689c958c LX |
5615 | #ifdef CONFIG_QUOTA |
5616 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
5617 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
5618 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
5619 | #endif | |
ac27a0ec DK |
5620 | return 0; |
5621 | } | |
5622 | ||
ac27a0ec DK |
5623 | |
5624 | #ifdef CONFIG_QUOTA | |
5625 | ||
bc8230ee JK |
5626 | /* |
5627 | * Helper functions so that transaction is started before we acquire dqio_sem | |
5628 | * to keep correct lock ordering of transaction > dqio_sem | |
5629 | */ | |
ac27a0ec DK |
5630 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
5631 | { | |
4c376dca | 5632 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
5633 | } |
5634 | ||
617ba13b | 5635 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
5636 | { |
5637 | int ret, err; | |
5638 | handle_t *handle; | |
5639 | struct inode *inode; | |
5640 | ||
5641 | inode = dquot_to_inode(dquot); | |
9924a92a | 5642 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 5643 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5644 | if (IS_ERR(handle)) |
5645 | return PTR_ERR(handle); | |
5646 | ret = dquot_commit(dquot); | |
617ba13b | 5647 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5648 | if (!ret) |
5649 | ret = err; | |
5650 | return ret; | |
5651 | } | |
5652 | ||
617ba13b | 5653 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
5654 | { |
5655 | int ret, err; | |
5656 | handle_t *handle; | |
5657 | ||
9924a92a | 5658 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5659 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5660 | if (IS_ERR(handle)) |
5661 | return PTR_ERR(handle); | |
5662 | ret = dquot_acquire(dquot); | |
617ba13b | 5663 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5664 | if (!ret) |
5665 | ret = err; | |
5666 | return ret; | |
5667 | } | |
5668 | ||
617ba13b | 5669 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5670 | { |
5671 | int ret, err; | |
5672 | handle_t *handle; | |
5673 | ||
9924a92a | 5674 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5675 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5676 | if (IS_ERR(handle)) { |
5677 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5678 | dquot_release(dquot); | |
ac27a0ec | 5679 | return PTR_ERR(handle); |
9c3013e9 | 5680 | } |
ac27a0ec | 5681 | ret = dquot_release(dquot); |
617ba13b | 5682 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5683 | if (!ret) |
5684 | ret = err; | |
5685 | return ret; | |
5686 | } | |
5687 | ||
617ba13b | 5688 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5689 | { |
262b4662 JK |
5690 | struct super_block *sb = dquot->dq_sb; |
5691 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5692 | ||
2c8be6b2 | 5693 | /* Are we journaling quotas? */ |
e2b911c5 | 5694 | if (ext4_has_feature_quota(sb) || |
262b4662 | 5695 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 5696 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5697 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5698 | } else { |
5699 | return dquot_mark_dquot_dirty(dquot); | |
5700 | } | |
5701 | } | |
5702 | ||
617ba13b | 5703 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5704 | { |
5705 | int ret, err; | |
5706 | handle_t *handle; | |
5707 | ||
5708 | /* Data block + inode block */ | |
2b0143b5 | 5709 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5710 | if (IS_ERR(handle)) |
5711 | return PTR_ERR(handle); | |
5712 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5713 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5714 | if (!ret) |
5715 | ret = err; | |
5716 | return ret; | |
5717 | } | |
5718 | ||
5719 | /* | |
5720 | * Turn on quotas during mount time - we need to find | |
5721 | * the quota file and such... | |
5722 | */ | |
617ba13b | 5723 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5724 | { |
33458eab | 5725 | return dquot_quota_on_mount(sb, get_qf_name(sb, EXT4_SB(sb), type), |
287a8095 | 5726 | EXT4_SB(sb)->s_jquota_fmt, type); |
ac27a0ec DK |
5727 | } |
5728 | ||
daf647d2 TT |
5729 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
5730 | { | |
5731 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5732 | ||
5733 | /* The first argument of lockdep_set_subclass has to be | |
5734 | * *exactly* the same as the argument to init_rwsem() --- in | |
5735 | * this case, in init_once() --- or lockdep gets unhappy | |
5736 | * because the name of the lock is set using the | |
5737 | * stringification of the argument to init_rwsem(). | |
5738 | */ | |
5739 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ | |
5740 | lockdep_set_subclass(&ei->i_data_sem, subclass); | |
5741 | } | |
5742 | ||
ac27a0ec DK |
5743 | /* |
5744 | * Standard function to be called on quota_on | |
5745 | */ | |
617ba13b | 5746 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 5747 | const struct path *path) |
ac27a0ec DK |
5748 | { |
5749 | int err; | |
ac27a0ec DK |
5750 | |
5751 | if (!test_opt(sb, QUOTA)) | |
5752 | return -EINVAL; | |
0623543b | 5753 | |
ac27a0ec | 5754 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5755 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5756 | return -EXDEV; |
0623543b JK |
5757 | /* Journaling quota? */ |
5758 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5759 | /* Quotafile not in fs root? */ |
f00c9e44 | 5760 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5761 | ext4_msg(sb, KERN_WARNING, |
5762 | "Quota file not on filesystem root. " | |
5763 | "Journaled quota will not work"); | |
91389240 JK |
5764 | sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; |
5765 | } else { | |
5766 | /* | |
5767 | * Clear the flag just in case mount options changed since | |
5768 | * last time. | |
5769 | */ | |
5770 | sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; | |
2b2d6d01 | 5771 | } |
0623543b JK |
5772 | |
5773 | /* | |
5774 | * When we journal data on quota file, we have to flush journal to see | |
5775 | * all updates to the file when we bypass pagecache... | |
5776 | */ | |
0390131b | 5777 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5778 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5779 | /* |
5780 | * We don't need to lock updates but journal_flush() could | |
5781 | * otherwise be livelocked... | |
5782 | */ | |
5783 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5784 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5785 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5786 | if (err) |
7ffe1ea8 | 5787 | return err; |
0623543b | 5788 | } |
957153fc | 5789 | |
daf647d2 TT |
5790 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
5791 | err = dquot_quota_on(sb, type, format_id, path); | |
957153fc | 5792 | if (err) { |
daf647d2 TT |
5793 | lockdep_set_quota_inode(path->dentry->d_inode, |
5794 | I_DATA_SEM_NORMAL); | |
957153fc JK |
5795 | } else { |
5796 | struct inode *inode = d_inode(path->dentry); | |
5797 | handle_t *handle; | |
5798 | ||
61a92987 JK |
5799 | /* |
5800 | * Set inode flags to prevent userspace from messing with quota | |
5801 | * files. If this fails, we return success anyway since quotas | |
5802 | * are already enabled and this is not a hard failure. | |
5803 | */ | |
957153fc JK |
5804 | inode_lock(inode); |
5805 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); | |
5806 | if (IS_ERR(handle)) | |
5807 | goto unlock_inode; | |
5808 | EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; | |
5809 | inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, | |
5810 | S_NOATIME | S_IMMUTABLE); | |
5811 | ext4_mark_inode_dirty(handle, inode); | |
5812 | ext4_journal_stop(handle); | |
5813 | unlock_inode: | |
5814 | inode_unlock(inode); | |
5815 | } | |
daf647d2 | 5816 | return err; |
ac27a0ec DK |
5817 | } |
5818 | ||
7c319d32 AK |
5819 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5820 | unsigned int flags) | |
5821 | { | |
5822 | int err; | |
5823 | struct inode *qf_inode; | |
a2d4a646 | 5824 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5825 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5826 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5827 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5828 | }; |
5829 | ||
e2b911c5 | 5830 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5831 | |
5832 | if (!qf_inums[type]) | |
5833 | return -EPERM; | |
5834 | ||
8a363970 | 5835 | qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); |
7c319d32 AK |
5836 | if (IS_ERR(qf_inode)) { |
5837 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5838 | return PTR_ERR(qf_inode); | |
5839 | } | |
5840 | ||
bcb13850 JK |
5841 | /* Don't account quota for quota files to avoid recursion */ |
5842 | qf_inode->i_flags |= S_NOQUOTA; | |
daf647d2 | 5843 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
7c319d32 | 5844 | err = dquot_enable(qf_inode, type, format_id, flags); |
daf647d2 TT |
5845 | if (err) |
5846 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); | |
61157b24 | 5847 | iput(qf_inode); |
7c319d32 AK |
5848 | |
5849 | return err; | |
5850 | } | |
5851 | ||
5852 | /* Enable usage tracking for all quota types. */ | |
5853 | static int ext4_enable_quotas(struct super_block *sb) | |
5854 | { | |
5855 | int type, err = 0; | |
a2d4a646 | 5856 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5857 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5858 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5859 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 | 5860 | }; |
49da9392 JK |
5861 | bool quota_mopt[EXT4_MAXQUOTAS] = { |
5862 | test_opt(sb, USRQUOTA), | |
5863 | test_opt(sb, GRPQUOTA), | |
5864 | test_opt(sb, PRJQUOTA), | |
5865 | }; | |
7c319d32 | 5866 | |
91389240 | 5867 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; |
a2d4a646 | 5868 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5869 | if (qf_inums[type]) { |
5870 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
49da9392 JK |
5871 | DQUOT_USAGE_ENABLED | |
5872 | (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); | |
7c319d32 AK |
5873 | if (err) { |
5874 | ext4_warning(sb, | |
72ba7450 TT |
5875 | "Failed to enable quota tracking " |
5876 | "(type=%d, err=%d). Please run " | |
5877 | "e2fsck to fix.", type, err); | |
7f144fd0 JU |
5878 | for (type--; type >= 0; type--) |
5879 | dquot_quota_off(sb, type); | |
5880 | ||
7c319d32 AK |
5881 | return err; |
5882 | } | |
5883 | } | |
5884 | } | |
5885 | return 0; | |
5886 | } | |
5887 | ||
ca0e05e4 DM |
5888 | static int ext4_quota_off(struct super_block *sb, int type) |
5889 | { | |
21f97697 JK |
5890 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5891 | handle_t *handle; | |
957153fc | 5892 | int err; |
21f97697 | 5893 | |
87009d86 DM |
5894 | /* Force all delayed allocation blocks to be allocated. |
5895 | * Caller already holds s_umount sem */ | |
5896 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5897 | sync_filesystem(sb); |
ca0e05e4 | 5898 | |
957153fc | 5899 | if (!inode || !igrab(inode)) |
0b268590 AG |
5900 | goto out; |
5901 | ||
957153fc | 5902 | err = dquot_quota_off(sb, type); |
964edf66 | 5903 | if (err || ext4_has_feature_quota(sb)) |
957153fc JK |
5904 | goto out_put; |
5905 | ||
5906 | inode_lock(inode); | |
61a92987 JK |
5907 | /* |
5908 | * Update modification times of quota files when userspace can | |
5909 | * start looking at them. If we fail, we return success anyway since | |
5910 | * this is not a hard failure and quotas are already disabled. | |
5911 | */ | |
9924a92a | 5912 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 | 5913 | if (IS_ERR(handle)) |
957153fc JK |
5914 | goto out_unlock; |
5915 | EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); | |
5916 | inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); | |
eeca7ea1 | 5917 | inode->i_mtime = inode->i_ctime = current_time(inode); |
21f97697 JK |
5918 | ext4_mark_inode_dirty(handle, inode); |
5919 | ext4_journal_stop(handle); | |
957153fc JK |
5920 | out_unlock: |
5921 | inode_unlock(inode); | |
5922 | out_put: | |
964edf66 | 5923 | lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); |
957153fc JK |
5924 | iput(inode); |
5925 | return err; | |
21f97697 | 5926 | out: |
ca0e05e4 DM |
5927 | return dquot_quota_off(sb, type); |
5928 | } | |
5929 | ||
ac27a0ec DK |
5930 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5931 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5932 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5933 | * we don't have to be afraid of races */ |
617ba13b | 5934 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5935 | size_t len, loff_t off) |
5936 | { | |
5937 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5938 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5939 | int offset = off & (sb->s_blocksize - 1); |
5940 | int tocopy; | |
5941 | size_t toread; | |
5942 | struct buffer_head *bh; | |
5943 | loff_t i_size = i_size_read(inode); | |
5944 | ||
5945 | if (off > i_size) | |
5946 | return 0; | |
5947 | if (off+len > i_size) | |
5948 | len = i_size-off; | |
5949 | toread = len; | |
5950 | while (toread > 0) { | |
5951 | tocopy = sb->s_blocksize - offset < toread ? | |
5952 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5953 | bh = ext4_bread(NULL, inode, blk, 0); |
5954 | if (IS_ERR(bh)) | |
5955 | return PTR_ERR(bh); | |
ac27a0ec DK |
5956 | if (!bh) /* A hole? */ |
5957 | memset(data, 0, tocopy); | |
5958 | else | |
5959 | memcpy(data, bh->b_data+offset, tocopy); | |
5960 | brelse(bh); | |
5961 | offset = 0; | |
5962 | toread -= tocopy; | |
5963 | data += tocopy; | |
5964 | blk++; | |
5965 | } | |
5966 | return len; | |
5967 | } | |
5968 | ||
5969 | /* Write to quotafile (we know the transaction is already started and has | |
5970 | * enough credits) */ | |
617ba13b | 5971 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5972 | const char *data, size_t len, loff_t off) |
5973 | { | |
5974 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5975 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5976 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5977 | int retries = 0; |
ac27a0ec DK |
5978 | struct buffer_head *bh; |
5979 | handle_t *handle = journal_current_handle(); | |
5980 | ||
0390131b | 5981 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5982 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5983 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5984 | (unsigned long long)off, (unsigned long long)len); |
5985 | return -EIO; | |
5986 | } | |
67eeb568 DM |
5987 | /* |
5988 | * Since we account only one data block in transaction credits, | |
5989 | * then it is impossible to cross a block boundary. | |
5990 | */ | |
5991 | if (sb->s_blocksize - offset < len) { | |
5992 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5993 | " cancelled because not block aligned", | |
5994 | (unsigned long long)off, (unsigned long long)len); | |
5995 | return -EIO; | |
5996 | } | |
5997 | ||
c5e298ae TT |
5998 | do { |
5999 | bh = ext4_bread(handle, inode, blk, | |
6000 | EXT4_GET_BLOCKS_CREATE | | |
6001 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
6002 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
6003 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
6004 | if (IS_ERR(bh)) |
6005 | return PTR_ERR(bh); | |
67eeb568 DM |
6006 | if (!bh) |
6007 | goto out; | |
5d601255 | 6008 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
6009 | err = ext4_journal_get_write_access(handle, bh); |
6010 | if (err) { | |
6011 | brelse(bh); | |
1c215028 | 6012 | return err; |
ac27a0ec | 6013 | } |
67eeb568 DM |
6014 | lock_buffer(bh); |
6015 | memcpy(bh->b_data+offset, data, len); | |
6016 | flush_dcache_page(bh->b_page); | |
6017 | unlock_buffer(bh); | |
62d2b5f2 | 6018 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 6019 | brelse(bh); |
ac27a0ec | 6020 | out: |
67eeb568 DM |
6021 | if (inode->i_size < off + len) { |
6022 | i_size_write(inode, off + len); | |
617ba13b | 6023 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 6024 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 6025 | } |
67eeb568 | 6026 | return len; |
ac27a0ec DK |
6027 | } |
6028 | ||
8f0e8746 TT |
6029 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) |
6030 | { | |
6031 | const struct quota_format_ops *ops; | |
6032 | ||
6033 | if (!sb_has_quota_loaded(sb, qid->type)) | |
6034 | return -ESRCH; | |
6035 | ops = sb_dqopt(sb)->ops[qid->type]; | |
6036 | if (!ops || !ops->get_next_id) | |
6037 | return -ENOSYS; | |
6038 | return dquot_get_next_id(sb, qid); | |
6039 | } | |
ac27a0ec DK |
6040 | #endif |
6041 | ||
152a0836 AV |
6042 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
6043 | const char *dev_name, void *data) | |
ac27a0ec | 6044 | { |
152a0836 | 6045 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
6046 | } |
6047 | ||
c290ea01 | 6048 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
6049 | static inline void register_as_ext2(void) |
6050 | { | |
6051 | int err = register_filesystem(&ext2_fs_type); | |
6052 | if (err) | |
6053 | printk(KERN_WARNING | |
6054 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
6055 | } | |
6056 | ||
6057 | static inline void unregister_as_ext2(void) | |
6058 | { | |
6059 | unregister_filesystem(&ext2_fs_type); | |
6060 | } | |
2035e776 TT |
6061 | |
6062 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
6063 | { | |
e2b911c5 | 6064 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 | 6065 | return 0; |
bc98a42c | 6066 | if (sb_rdonly(sb)) |
2035e776 | 6067 | return 1; |
e2b911c5 | 6068 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
6069 | return 0; |
6070 | return 1; | |
6071 | } | |
24b58424 TT |
6072 | #else |
6073 | static inline void register_as_ext2(void) { } | |
6074 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 6075 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
6076 | #endif |
6077 | ||
24b58424 TT |
6078 | static inline void register_as_ext3(void) |
6079 | { | |
6080 | int err = register_filesystem(&ext3_fs_type); | |
6081 | if (err) | |
6082 | printk(KERN_WARNING | |
6083 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
6084 | } | |
6085 | ||
6086 | static inline void unregister_as_ext3(void) | |
6087 | { | |
6088 | unregister_filesystem(&ext3_fs_type); | |
6089 | } | |
2035e776 TT |
6090 | |
6091 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
6092 | { | |
e2b911c5 | 6093 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 6094 | return 0; |
e2b911c5 | 6095 | if (!ext4_has_feature_journal(sb)) |
2035e776 | 6096 | return 0; |
bc98a42c | 6097 | if (sb_rdonly(sb)) |
2035e776 | 6098 | return 1; |
e2b911c5 | 6099 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
6100 | return 0; |
6101 | return 1; | |
6102 | } | |
24b58424 | 6103 | |
03010a33 TT |
6104 | static struct file_system_type ext4_fs_type = { |
6105 | .owner = THIS_MODULE, | |
6106 | .name = "ext4", | |
152a0836 | 6107 | .mount = ext4_mount, |
03010a33 | 6108 | .kill_sb = kill_block_super, |
0dcf2745 | 6109 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
03010a33 | 6110 | }; |
7f78e035 | 6111 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 6112 | |
e9e3bcec ES |
6113 | /* Shared across all ext4 file systems */ |
6114 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
e9e3bcec | 6115 | |
5dabfc78 | 6116 | static int __init ext4_init_fs(void) |
ac27a0ec | 6117 | { |
e9e3bcec | 6118 | int i, err; |
c9de560d | 6119 | |
e294a537 | 6120 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
6121 | ext4_li_info = NULL; |
6122 | mutex_init(&ext4_li_mtx); | |
6123 | ||
9a4c8019 | 6124 | /* Build-time check for flags consistency */ |
12e9b892 | 6125 | ext4_check_flag_values(); |
e9e3bcec | 6126 | |
e142d052 | 6127 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
e9e3bcec | 6128 | init_waitqueue_head(&ext4__ioend_wq[i]); |
e9e3bcec | 6129 | |
51865fda | 6130 | err = ext4_init_es(); |
6fd058f7 TT |
6131 | if (err) |
6132 | return err; | |
51865fda | 6133 | |
1dc0aa46 EW |
6134 | err = ext4_init_pending(); |
6135 | if (err) | |
6136 | goto out6; | |
6137 | ||
51865fda ZL |
6138 | err = ext4_init_pageio(); |
6139 | if (err) | |
b5799018 | 6140 | goto out5; |
51865fda | 6141 | |
5dabfc78 | 6142 | err = ext4_init_system_zone(); |
bd2d0210 | 6143 | if (err) |
b5799018 | 6144 | goto out4; |
857ac889 | 6145 | |
b5799018 | 6146 | err = ext4_init_sysfs(); |
dd68314c | 6147 | if (err) |
b5799018 | 6148 | goto out3; |
857ac889 | 6149 | |
5dabfc78 | 6150 | err = ext4_init_mballoc(); |
c9de560d AT |
6151 | if (err) |
6152 | goto out2; | |
ac27a0ec DK |
6153 | err = init_inodecache(); |
6154 | if (err) | |
6155 | goto out1; | |
24b58424 | 6156 | register_as_ext3(); |
2035e776 | 6157 | register_as_ext2(); |
03010a33 | 6158 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
6159 | if (err) |
6160 | goto out; | |
bfff6873 | 6161 | |
ac27a0ec DK |
6162 | return 0; |
6163 | out: | |
24b58424 TT |
6164 | unregister_as_ext2(); |
6165 | unregister_as_ext3(); | |
ac27a0ec DK |
6166 | destroy_inodecache(); |
6167 | out1: | |
5dabfc78 | 6168 | ext4_exit_mballoc(); |
9c191f70 | 6169 | out2: |
b5799018 TT |
6170 | ext4_exit_sysfs(); |
6171 | out3: | |
5dabfc78 | 6172 | ext4_exit_system_zone(); |
b5799018 | 6173 | out4: |
5dabfc78 | 6174 | ext4_exit_pageio(); |
b5799018 | 6175 | out5: |
1dc0aa46 EW |
6176 | ext4_exit_pending(); |
6177 | out6: | |
51865fda ZL |
6178 | ext4_exit_es(); |
6179 | ||
ac27a0ec DK |
6180 | return err; |
6181 | } | |
6182 | ||
5dabfc78 | 6183 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 6184 | { |
bfff6873 | 6185 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
6186 | unregister_as_ext2(); |
6187 | unregister_as_ext3(); | |
03010a33 | 6188 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 6189 | destroy_inodecache(); |
5dabfc78 | 6190 | ext4_exit_mballoc(); |
b5799018 | 6191 | ext4_exit_sysfs(); |
5dabfc78 TT |
6192 | ext4_exit_system_zone(); |
6193 | ext4_exit_pageio(); | |
dd12ed14 | 6194 | ext4_exit_es(); |
1dc0aa46 | 6195 | ext4_exit_pending(); |
ac27a0ec DK |
6196 | } |
6197 | ||
6198 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 6199 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 6200 | MODULE_LICENSE("GPL"); |
7ef79ad5 | 6201 | MODULE_SOFTDEP("pre: crc32c"); |
5dabfc78 TT |
6202 | module_init(ext4_init_fs) |
6203 | module_exit(ext4_exit_fs) |