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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
66114cad | 27 | #include <linux/backing-dev.h> |
ac27a0ec | 28 | #include <linux/parser.h> |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
3197ebdb | 37 | #include <linux/ctype.h> |
1330593e | 38 | #include <linux/log2.h> |
717d50e4 | 39 | #include <linux/crc16.h> |
7abc52c2 | 40 | #include <linux/cleancache.h> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 | 46 | #include "ext4.h" |
4a092d73 | 47 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 48 | #include "ext4_jbd2.h" |
ac27a0ec DK |
49 | #include "xattr.h" |
50 | #include "acl.h" | |
3661d286 | 51 | #include "mballoc.h" |
ac27a0ec | 52 | |
9bffad1e TT |
53 | #define CREATE_TRACE_POINTS |
54 | #include <trace/events/ext4.h> | |
55 | ||
0b75a840 LC |
56 | static struct ext4_lazy_init *ext4_li_info; |
57 | static struct mutex ext4_li_mtx; | |
9c191f70 | 58 | static int ext4_mballoc_ready; |
e294a537 | 59 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
9f6200bb | 60 | |
617ba13b | 61 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 62 | unsigned long journal_devnum); |
2adf6da8 | 63 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 64 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
65 | static void ext4_mark_recovery_complete(struct super_block *sb, |
66 | struct ext4_super_block *es); | |
67 | static void ext4_clear_journal_err(struct super_block *sb, | |
68 | struct ext4_super_block *es); | |
617ba13b | 69 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 TT |
70 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
71 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 72 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 73 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
74 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
75 | const char *dev_name, void *data); | |
2035e776 TT |
76 | static inline int ext2_feature_set_ok(struct super_block *sb); |
77 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 78 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
79 | static void ext4_destroy_lazyinit_thread(void); |
80 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 81 | static void ext4_clear_request_list(void); |
ac27a0ec | 82 | |
e74031fd JK |
83 | /* |
84 | * Lock ordering | |
85 | * | |
86 | * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and | |
87 | * i_mmap_rwsem (inode->i_mmap_rwsem)! | |
88 | * | |
89 | * page fault path: | |
90 | * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> | |
91 | * page lock -> i_data_sem (rw) | |
92 | * | |
93 | * buffered write path: | |
94 | * sb_start_write -> i_mutex -> mmap_sem | |
95 | * sb_start_write -> i_mutex -> transaction start -> page lock -> | |
96 | * i_data_sem (rw) | |
97 | * | |
98 | * truncate: | |
99 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
100 | * i_mmap_rwsem (w) -> page lock | |
101 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
102 | * transaction start -> i_data_sem (rw) | |
103 | * | |
104 | * direct IO: | |
105 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem | |
106 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> | |
107 | * transaction start -> i_data_sem (rw) | |
108 | * | |
109 | * writepages: | |
110 | * transaction start -> page lock(s) -> i_data_sem (rw) | |
111 | */ | |
112 | ||
c290ea01 | 113 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
2035e776 TT |
114 | static struct file_system_type ext2_fs_type = { |
115 | .owner = THIS_MODULE, | |
116 | .name = "ext2", | |
117 | .mount = ext4_mount, | |
118 | .kill_sb = kill_block_super, | |
119 | .fs_flags = FS_REQUIRES_DEV, | |
120 | }; | |
7f78e035 | 121 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 122 | MODULE_ALIAS("ext2"); |
2035e776 TT |
123 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
124 | #else | |
125 | #define IS_EXT2_SB(sb) (0) | |
126 | #endif | |
127 | ||
128 | ||
ba69f9ab JK |
129 | static struct file_system_type ext3_fs_type = { |
130 | .owner = THIS_MODULE, | |
131 | .name = "ext3", | |
152a0836 | 132 | .mount = ext4_mount, |
ba69f9ab JK |
133 | .kill_sb = kill_block_super, |
134 | .fs_flags = FS_REQUIRES_DEV, | |
135 | }; | |
7f78e035 | 136 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 137 | MODULE_ALIAS("ext3"); |
ba69f9ab | 138 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
bd81d8ee | 139 | |
d25425f8 DW |
140 | static int ext4_verify_csum_type(struct super_block *sb, |
141 | struct ext4_super_block *es) | |
142 | { | |
e2b911c5 | 143 | if (!ext4_has_feature_metadata_csum(sb)) |
d25425f8 DW |
144 | return 1; |
145 | ||
146 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
147 | } | |
148 | ||
a9c47317 DW |
149 | static __le32 ext4_superblock_csum(struct super_block *sb, |
150 | struct ext4_super_block *es) | |
151 | { | |
152 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
153 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
154 | __u32 csum; | |
155 | ||
156 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
157 | ||
158 | return cpu_to_le32(csum); | |
159 | } | |
160 | ||
c197855e SH |
161 | static int ext4_superblock_csum_verify(struct super_block *sb, |
162 | struct ext4_super_block *es) | |
a9c47317 | 163 | { |
9aa5d32b | 164 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
165 | return 1; |
166 | ||
167 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
168 | } | |
169 | ||
06db49e6 | 170 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 171 | { |
06db49e6 TT |
172 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
173 | ||
9aa5d32b | 174 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
175 | return; |
176 | ||
177 | es->s_checksum = ext4_superblock_csum(sb, es); | |
178 | } | |
179 | ||
9933fc0a TT |
180 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
181 | { | |
182 | void *ret; | |
183 | ||
8be04b93 | 184 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
185 | if (!ret) |
186 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
187 | return ret; | |
188 | } | |
189 | ||
190 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
191 | { | |
192 | void *ret; | |
193 | ||
8be04b93 | 194 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
195 | if (!ret) |
196 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
197 | return ret; | |
198 | } | |
199 | ||
8fadc143 AR |
200 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
201 | struct ext4_group_desc *bg) | |
bd81d8ee | 202 | { |
3a14589c | 203 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 204 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 205 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
206 | } |
207 | ||
8fadc143 AR |
208 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
209 | struct ext4_group_desc *bg) | |
bd81d8ee | 210 | { |
5272f837 | 211 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 212 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 213 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
214 | } |
215 | ||
8fadc143 AR |
216 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
217 | struct ext4_group_desc *bg) | |
bd81d8ee | 218 | { |
5272f837 | 219 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 220 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 221 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
222 | } |
223 | ||
021b65bb TT |
224 | __u32 ext4_free_group_clusters(struct super_block *sb, |
225 | struct ext4_group_desc *bg) | |
560671a0 AK |
226 | { |
227 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
228 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 229 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
230 | } |
231 | ||
232 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
233 | struct ext4_group_desc *bg) | |
234 | { | |
235 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
236 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 237 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
238 | } |
239 | ||
240 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
241 | struct ext4_group_desc *bg) | |
242 | { | |
243 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
244 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 245 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
246 | } |
247 | ||
248 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
249 | struct ext4_group_desc *bg) | |
250 | { | |
251 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
252 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 253 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
254 | } |
255 | ||
8fadc143 AR |
256 | void ext4_block_bitmap_set(struct super_block *sb, |
257 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 258 | { |
3a14589c | 259 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
260 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
261 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
262 | } |
263 | ||
8fadc143 AR |
264 | void ext4_inode_bitmap_set(struct super_block *sb, |
265 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 266 | { |
5272f837 | 267 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
268 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
269 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
270 | } |
271 | ||
8fadc143 AR |
272 | void ext4_inode_table_set(struct super_block *sb, |
273 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 274 | { |
5272f837 | 275 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
276 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
277 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
278 | } |
279 | ||
021b65bb TT |
280 | void ext4_free_group_clusters_set(struct super_block *sb, |
281 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
282 | { |
283 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
284 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
285 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
286 | } | |
287 | ||
288 | void ext4_free_inodes_set(struct super_block *sb, | |
289 | struct ext4_group_desc *bg, __u32 count) | |
290 | { | |
291 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
292 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
293 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
294 | } | |
295 | ||
296 | void ext4_used_dirs_set(struct super_block *sb, | |
297 | struct ext4_group_desc *bg, __u32 count) | |
298 | { | |
299 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
300 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
301 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
302 | } | |
303 | ||
304 | void ext4_itable_unused_set(struct super_block *sb, | |
305 | struct ext4_group_desc *bg, __u32 count) | |
306 | { | |
307 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
308 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
309 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
310 | } | |
311 | ||
d3d1faf6 | 312 | |
1c13d5c0 TT |
313 | static void __save_error_info(struct super_block *sb, const char *func, |
314 | unsigned int line) | |
315 | { | |
316 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
317 | ||
318 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
1b46617b TT |
319 | if (bdev_read_only(sb->s_bdev)) |
320 | return; | |
1c13d5c0 TT |
321 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
322 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
323 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
324 | es->s_last_error_line = cpu_to_le32(line); | |
325 | if (!es->s_first_error_time) { | |
326 | es->s_first_error_time = es->s_last_error_time; | |
327 | strncpy(es->s_first_error_func, func, | |
328 | sizeof(es->s_first_error_func)); | |
329 | es->s_first_error_line = cpu_to_le32(line); | |
330 | es->s_first_error_ino = es->s_last_error_ino; | |
331 | es->s_first_error_block = es->s_last_error_block; | |
332 | } | |
66e61a9e TT |
333 | /* |
334 | * Start the daily error reporting function if it hasn't been | |
335 | * started already | |
336 | */ | |
337 | if (!es->s_error_count) | |
338 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 339 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
340 | } |
341 | ||
342 | static void save_error_info(struct super_block *sb, const char *func, | |
343 | unsigned int line) | |
344 | { | |
345 | __save_error_info(sb, func, line); | |
346 | ext4_commit_super(sb, 1); | |
347 | } | |
348 | ||
bdfe0cbd TT |
349 | /* |
350 | * The del_gendisk() function uninitializes the disk-specific data | |
351 | * structures, including the bdi structure, without telling anyone | |
352 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
353 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
354 | * This is a kludge to prevent these oops until we can put in a proper | |
355 | * hook in del_gendisk() to inform the VFS and file system layers. | |
356 | */ | |
357 | static int block_device_ejected(struct super_block *sb) | |
358 | { | |
359 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
360 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); | |
361 | ||
362 | return bdi->dev == NULL; | |
363 | } | |
364 | ||
18aadd47 BJ |
365 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
366 | { | |
367 | struct super_block *sb = journal->j_private; | |
368 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
369 | int error = is_journal_aborted(journal); | |
5d3ee208 | 370 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 371 | |
5d3ee208 | 372 | BUG_ON(txn->t_state == T_FINISHED); |
18aadd47 | 373 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
374 | while (!list_empty(&txn->t_private_list)) { |
375 | jce = list_entry(txn->t_private_list.next, | |
376 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
377 | list_del_init(&jce->jce_list); |
378 | spin_unlock(&sbi->s_md_lock); | |
379 | jce->jce_func(sb, jce, error); | |
380 | spin_lock(&sbi->s_md_lock); | |
381 | } | |
382 | spin_unlock(&sbi->s_md_lock); | |
383 | } | |
1c13d5c0 | 384 | |
ac27a0ec DK |
385 | /* Deal with the reporting of failure conditions on a filesystem such as |
386 | * inconsistencies detected or read IO failures. | |
387 | * | |
388 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 389 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
390 | * write ordering constraints on the superblock which prevent us from |
391 | * writing it out straight away; and given that the journal is about to | |
392 | * be aborted, we can't rely on the current, or future, transactions to | |
393 | * write out the superblock safely. | |
394 | * | |
dab291af | 395 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 396 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
397 | * that error until we've noted it down and cleared it. |
398 | */ | |
399 | ||
617ba13b | 400 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 401 | { |
ac27a0ec DK |
402 | if (sb->s_flags & MS_RDONLY) |
403 | return; | |
404 | ||
2b2d6d01 | 405 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 406 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 407 | |
4ab2f15b | 408 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 409 | if (journal) |
dab291af | 410 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 411 | } |
2b2d6d01 | 412 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 413 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
414 | /* |
415 | * Make sure updated value of ->s_mount_flags will be visible | |
416 | * before ->s_flags update | |
417 | */ | |
418 | smp_wmb(); | |
ac27a0ec DK |
419 | sb->s_flags |= MS_RDONLY; |
420 | } | |
4327ba52 DJ |
421 | if (test_opt(sb, ERRORS_PANIC)) { |
422 | if (EXT4_SB(sb)->s_journal && | |
423 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
424 | return; | |
617ba13b | 425 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec | 426 | sb->s_id); |
4327ba52 | 427 | } |
ac27a0ec DK |
428 | } |
429 | ||
efbed4dc TT |
430 | #define ext4_error_ratelimit(sb) \ |
431 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
432 | "EXT4-fs error") | |
433 | ||
12062ddd | 434 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 435 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 436 | { |
0ff2ea7d | 437 | struct va_format vaf; |
ac27a0ec DK |
438 | va_list args; |
439 | ||
efbed4dc TT |
440 | if (ext4_error_ratelimit(sb)) { |
441 | va_start(args, fmt); | |
442 | vaf.fmt = fmt; | |
443 | vaf.va = &args; | |
444 | printk(KERN_CRIT | |
445 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
446 | sb->s_id, function, line, current->comm, &vaf); | |
447 | va_end(args); | |
448 | } | |
f3fc0210 | 449 | save_error_info(sb, function, line); |
617ba13b | 450 | ext4_handle_error(sb); |
ac27a0ec DK |
451 | } |
452 | ||
e7c96e8e JP |
453 | void __ext4_error_inode(struct inode *inode, const char *function, |
454 | unsigned int line, ext4_fsblk_t block, | |
455 | const char *fmt, ...) | |
273df556 FM |
456 | { |
457 | va_list args; | |
f7c21177 | 458 | struct va_format vaf; |
1c13d5c0 | 459 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 460 | |
1c13d5c0 TT |
461 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
462 | es->s_last_error_block = cpu_to_le64(block); | |
efbed4dc TT |
463 | if (ext4_error_ratelimit(inode->i_sb)) { |
464 | va_start(args, fmt); | |
465 | vaf.fmt = fmt; | |
466 | vaf.va = &args; | |
467 | if (block) | |
468 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
469 | "inode #%lu: block %llu: comm %s: %pV\n", | |
470 | inode->i_sb->s_id, function, line, inode->i_ino, | |
471 | block, current->comm, &vaf); | |
472 | else | |
473 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
474 | "inode #%lu: comm %s: %pV\n", | |
475 | inode->i_sb->s_id, function, line, inode->i_ino, | |
476 | current->comm, &vaf); | |
477 | va_end(args); | |
478 | } | |
1c13d5c0 | 479 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
480 | ext4_handle_error(inode->i_sb); |
481 | } | |
482 | ||
e7c96e8e JP |
483 | void __ext4_error_file(struct file *file, const char *function, |
484 | unsigned int line, ext4_fsblk_t block, | |
485 | const char *fmt, ...) | |
273df556 FM |
486 | { |
487 | va_list args; | |
f7c21177 | 488 | struct va_format vaf; |
1c13d5c0 | 489 | struct ext4_super_block *es; |
496ad9aa | 490 | struct inode *inode = file_inode(file); |
273df556 FM |
491 | char pathname[80], *path; |
492 | ||
1c13d5c0 TT |
493 | es = EXT4_SB(inode->i_sb)->s_es; |
494 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
efbed4dc | 495 | if (ext4_error_ratelimit(inode->i_sb)) { |
9bf39ab2 | 496 | path = file_path(file, pathname, sizeof(pathname)); |
efbed4dc TT |
497 | if (IS_ERR(path)) |
498 | path = "(unknown)"; | |
499 | va_start(args, fmt); | |
500 | vaf.fmt = fmt; | |
501 | vaf.va = &args; | |
502 | if (block) | |
503 | printk(KERN_CRIT | |
504 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
505 | "block %llu: comm %s: path %s: %pV\n", | |
506 | inode->i_sb->s_id, function, line, inode->i_ino, | |
507 | block, current->comm, path, &vaf); | |
508 | else | |
509 | printk(KERN_CRIT | |
510 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
511 | "comm %s: path %s: %pV\n", | |
512 | inode->i_sb->s_id, function, line, inode->i_ino, | |
513 | current->comm, path, &vaf); | |
514 | va_end(args); | |
515 | } | |
1c13d5c0 | 516 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
517 | ext4_handle_error(inode->i_sb); |
518 | } | |
519 | ||
722887dd TT |
520 | const char *ext4_decode_error(struct super_block *sb, int errno, |
521 | char nbuf[16]) | |
ac27a0ec DK |
522 | { |
523 | char *errstr = NULL; | |
524 | ||
525 | switch (errno) { | |
6a797d27 DW |
526 | case -EFSCORRUPTED: |
527 | errstr = "Corrupt filesystem"; | |
528 | break; | |
529 | case -EFSBADCRC: | |
530 | errstr = "Filesystem failed CRC"; | |
531 | break; | |
ac27a0ec DK |
532 | case -EIO: |
533 | errstr = "IO failure"; | |
534 | break; | |
535 | case -ENOMEM: | |
536 | errstr = "Out of memory"; | |
537 | break; | |
538 | case -EROFS: | |
78f1ddbb TT |
539 | if (!sb || (EXT4_SB(sb)->s_journal && |
540 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
541 | errstr = "Journal has aborted"; |
542 | else | |
543 | errstr = "Readonly filesystem"; | |
544 | break; | |
545 | default: | |
546 | /* If the caller passed in an extra buffer for unknown | |
547 | * errors, textualise them now. Else we just return | |
548 | * NULL. */ | |
549 | if (nbuf) { | |
550 | /* Check for truncated error codes... */ | |
551 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
552 | errstr = nbuf; | |
553 | } | |
554 | break; | |
555 | } | |
556 | ||
557 | return errstr; | |
558 | } | |
559 | ||
617ba13b | 560 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
561 | * automatically and invokes the appropriate error response. */ |
562 | ||
c398eda0 TT |
563 | void __ext4_std_error(struct super_block *sb, const char *function, |
564 | unsigned int line, int errno) | |
ac27a0ec DK |
565 | { |
566 | char nbuf[16]; | |
567 | const char *errstr; | |
568 | ||
569 | /* Special case: if the error is EROFS, and we're not already | |
570 | * inside a transaction, then there's really no point in logging | |
571 | * an error. */ | |
572 | if (errno == -EROFS && journal_current_handle() == NULL && | |
573 | (sb->s_flags & MS_RDONLY)) | |
574 | return; | |
575 | ||
efbed4dc TT |
576 | if (ext4_error_ratelimit(sb)) { |
577 | errstr = ext4_decode_error(sb, errno, nbuf); | |
578 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
579 | sb->s_id, function, line, errstr); | |
580 | } | |
ac27a0ec | 581 | |
efbed4dc | 582 | save_error_info(sb, function, line); |
617ba13b | 583 | ext4_handle_error(sb); |
ac27a0ec DK |
584 | } |
585 | ||
586 | /* | |
617ba13b | 587 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
588 | * abort function may be used to deal with unrecoverable failures such |
589 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
590 | * | |
591 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
592 | * unless the error response on the fs has been set to panic in which | |
593 | * case we take the easy way out and panic immediately. | |
594 | */ | |
595 | ||
c67d859e | 596 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 597 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
598 | { |
599 | va_list args; | |
600 | ||
1c13d5c0 | 601 | save_error_info(sb, function, line); |
ac27a0ec | 602 | va_start(args, fmt); |
c398eda0 TT |
603 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
604 | function, line); | |
ac27a0ec DK |
605 | vprintk(fmt, args); |
606 | printk("\n"); | |
607 | va_end(args); | |
608 | ||
1c13d5c0 TT |
609 | if ((sb->s_flags & MS_RDONLY) == 0) { |
610 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 611 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
612 | /* |
613 | * Make sure updated value of ->s_mount_flags will be visible | |
614 | * before ->s_flags update | |
615 | */ | |
616 | smp_wmb(); | |
617 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
618 | if (EXT4_SB(sb)->s_journal) |
619 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
620 | save_error_info(sb, function, line); | |
621 | } | |
4327ba52 DJ |
622 | if (test_opt(sb, ERRORS_PANIC)) { |
623 | if (EXT4_SB(sb)->s_journal && | |
624 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
625 | return; | |
617ba13b | 626 | panic("EXT4-fs panic from previous error\n"); |
4327ba52 | 627 | } |
ac27a0ec DK |
628 | } |
629 | ||
e7c96e8e JP |
630 | void __ext4_msg(struct super_block *sb, |
631 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 632 | { |
0ff2ea7d | 633 | struct va_format vaf; |
b31e1552 ES |
634 | va_list args; |
635 | ||
efbed4dc TT |
636 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
637 | return; | |
638 | ||
b31e1552 | 639 | va_start(args, fmt); |
0ff2ea7d JP |
640 | vaf.fmt = fmt; |
641 | vaf.va = &args; | |
642 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
643 | va_end(args); |
644 | } | |
645 | ||
b03a2f7e AD |
646 | #define ext4_warning_ratelimit(sb) \ |
647 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
648 | "EXT4-fs warning") | |
649 | ||
12062ddd | 650 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 651 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 652 | { |
0ff2ea7d | 653 | struct va_format vaf; |
ac27a0ec DK |
654 | va_list args; |
655 | ||
b03a2f7e | 656 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
657 | return; |
658 | ||
ac27a0ec | 659 | va_start(args, fmt); |
0ff2ea7d JP |
660 | vaf.fmt = fmt; |
661 | vaf.va = &args; | |
662 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
663 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
664 | va_end(args); |
665 | } | |
666 | ||
b03a2f7e AD |
667 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
668 | unsigned int line, const char *fmt, ...) | |
669 | { | |
670 | struct va_format vaf; | |
671 | va_list args; | |
672 | ||
673 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
674 | return; | |
675 | ||
676 | va_start(args, fmt); | |
677 | vaf.fmt = fmt; | |
678 | vaf.va = &args; | |
679 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
680 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
681 | function, line, inode->i_ino, current->comm, &vaf); | |
682 | va_end(args); | |
683 | } | |
684 | ||
e29136f8 TT |
685 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
686 | struct super_block *sb, ext4_group_t grp, | |
687 | unsigned long ino, ext4_fsblk_t block, | |
688 | const char *fmt, ...) | |
5d1b1b3f AK |
689 | __releases(bitlock) |
690 | __acquires(bitlock) | |
691 | { | |
0ff2ea7d | 692 | struct va_format vaf; |
5d1b1b3f AK |
693 | va_list args; |
694 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
695 | ||
1c13d5c0 TT |
696 | es->s_last_error_ino = cpu_to_le32(ino); |
697 | es->s_last_error_block = cpu_to_le64(block); | |
698 | __save_error_info(sb, function, line); | |
0ff2ea7d | 699 | |
efbed4dc TT |
700 | if (ext4_error_ratelimit(sb)) { |
701 | va_start(args, fmt); | |
702 | vaf.fmt = fmt; | |
703 | vaf.va = &args; | |
704 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
705 | sb->s_id, function, line, grp); | |
706 | if (ino) | |
707 | printk(KERN_CONT "inode %lu: ", ino); | |
708 | if (block) | |
709 | printk(KERN_CONT "block %llu:", | |
710 | (unsigned long long) block); | |
711 | printk(KERN_CONT "%pV\n", &vaf); | |
712 | va_end(args); | |
713 | } | |
5d1b1b3f AK |
714 | |
715 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 716 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
717 | return; |
718 | } | |
1c13d5c0 | 719 | |
5d1b1b3f AK |
720 | ext4_unlock_group(sb, grp); |
721 | ext4_handle_error(sb); | |
722 | /* | |
723 | * We only get here in the ERRORS_RO case; relocking the group | |
724 | * may be dangerous, but nothing bad will happen since the | |
725 | * filesystem will have already been marked read/only and the | |
726 | * journal has been aborted. We return 1 as a hint to callers | |
727 | * who might what to use the return value from | |
25985edc | 728 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
729 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
730 | * aggressively from the ext4 function in question, with a | |
731 | * more appropriate error code. | |
732 | */ | |
733 | ext4_lock_group(sb, grp); | |
734 | return; | |
735 | } | |
736 | ||
617ba13b | 737 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 738 | { |
617ba13b | 739 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 740 | |
617ba13b | 741 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
742 | return; |
743 | ||
12062ddd | 744 | ext4_warning(sb, |
ac27a0ec DK |
745 | "updating to rev %d because of new feature flag, " |
746 | "running e2fsck is recommended", | |
617ba13b | 747 | EXT4_DYNAMIC_REV); |
ac27a0ec | 748 | |
617ba13b MC |
749 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
750 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
751 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
752 | /* leave es->s_feature_*compat flags alone */ |
753 | /* es->s_uuid will be set by e2fsck if empty */ | |
754 | ||
755 | /* | |
756 | * The rest of the superblock fields should be zero, and if not it | |
757 | * means they are likely already in use, so leave them alone. We | |
758 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
759 | */ | |
760 | } | |
761 | ||
762 | /* | |
763 | * Open the external journal device | |
764 | */ | |
b31e1552 | 765 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
766 | { |
767 | struct block_device *bdev; | |
768 | char b[BDEVNAME_SIZE]; | |
769 | ||
d4d77629 | 770 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
771 | if (IS_ERR(bdev)) |
772 | goto fail; | |
773 | return bdev; | |
774 | ||
775 | fail: | |
b31e1552 | 776 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
777 | __bdevname(dev, b), PTR_ERR(bdev)); |
778 | return NULL; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Release the journal device | |
783 | */ | |
4385bab1 | 784 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 785 | { |
4385bab1 | 786 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
787 | } |
788 | ||
4385bab1 | 789 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
790 | { |
791 | struct block_device *bdev; | |
ac27a0ec DK |
792 | bdev = sbi->journal_bdev; |
793 | if (bdev) { | |
4385bab1 | 794 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
795 | sbi->journal_bdev = NULL; |
796 | } | |
ac27a0ec DK |
797 | } |
798 | ||
799 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
800 | { | |
617ba13b | 801 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
802 | } |
803 | ||
617ba13b | 804 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
805 | { |
806 | struct list_head *l; | |
807 | ||
b31e1552 ES |
808 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
809 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
810 | |
811 | printk(KERN_ERR "sb_info orphan list:\n"); | |
812 | list_for_each(l, &sbi->s_orphan) { | |
813 | struct inode *inode = orphan_list_entry(l); | |
814 | printk(KERN_ERR " " | |
815 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
816 | inode->i_sb->s_id, inode->i_ino, inode, | |
817 | inode->i_mode, inode->i_nlink, | |
818 | NEXT_ORPHAN(inode)); | |
819 | } | |
820 | } | |
821 | ||
2b2d6d01 | 822 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 823 | { |
617ba13b MC |
824 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
825 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 826 | int i, err; |
ac27a0ec | 827 | |
857ac889 | 828 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
829 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
830 | ||
2e8fa54e | 831 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 832 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 833 | |
0390131b FM |
834 | if (sbi->s_journal) { |
835 | err = jbd2_journal_destroy(sbi->s_journal); | |
836 | sbi->s_journal = NULL; | |
837 | if (err < 0) | |
c67d859e | 838 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 839 | } |
d4edac31 | 840 | |
ebd173be | 841 | ext4_unregister_sysfs(sb); |
d3922a77 | 842 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 843 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
844 | ext4_release_system_zone(sb); |
845 | ext4_mb_release(sb); | |
846 | ext4_ext_release(sb); | |
847 | ext4_xattr_put_super(sb); | |
848 | ||
ac27a0ec | 849 | if (!(sb->s_flags & MS_RDONLY)) { |
e2b911c5 | 850 | ext4_clear_feature_journal_needs_recovery(sb); |
ac27a0ec | 851 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 852 | } |
58c5873a | 853 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
854 | ext4_commit_super(sb, 1); |
855 | ||
ac27a0ec DK |
856 | for (i = 0; i < sbi->s_gdb_count; i++) |
857 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
858 | kvfree(sbi->s_group_desc); |
859 | kvfree(sbi->s_flex_groups); | |
57042651 | 860 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
861 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
862 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 863 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
864 | brelse(sbi->s_sbh); |
865 | #ifdef CONFIG_QUOTA | |
a2d4a646 | 866 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
867 | kfree(sbi->s_qf_names[i]); |
868 | #endif | |
869 | ||
870 | /* Debugging code just in case the in-memory inode orphan list | |
871 | * isn't empty. The on-disk one can be non-empty if we've | |
872 | * detected an error and taken the fs readonly, but the | |
873 | * in-memory list had better be clean by this point. */ | |
874 | if (!list_empty(&sbi->s_orphan)) | |
875 | dump_orphan_list(sb, sbi); | |
876 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
877 | ||
89d96a6f | 878 | sync_blockdev(sb->s_bdev); |
f98393a6 | 879 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
880 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
881 | /* | |
882 | * Invalidate the journal device's buffers. We don't want them | |
883 | * floating about in memory - the physical journal device may | |
884 | * hotswapped, and it breaks the `ro-after' testing code. | |
885 | */ | |
886 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 887 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 888 | ext4_blkdev_remove(sbi); |
ac27a0ec | 889 | } |
9c191f70 M |
890 | if (sbi->s_mb_cache) { |
891 | ext4_xattr_destroy_cache(sbi->s_mb_cache); | |
892 | sbi->s_mb_cache = NULL; | |
893 | } | |
c5e06d10 JL |
894 | if (sbi->s_mmp_tsk) |
895 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 896 | sb->s_fs_info = NULL; |
3197ebdb TT |
897 | /* |
898 | * Now that we are completely done shutting down the | |
899 | * superblock, we need to actually destroy the kobject. | |
900 | */ | |
3197ebdb TT |
901 | kobject_put(&sbi->s_kobj); |
902 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
903 | if (sbi->s_chksum_driver) |
904 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 905 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 906 | kfree(sbi); |
ac27a0ec DK |
907 | } |
908 | ||
e18b890b | 909 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
910 | |
911 | /* | |
912 | * Called inside transaction, so use GFP_NOFS | |
913 | */ | |
617ba13b | 914 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 915 | { |
617ba13b | 916 | struct ext4_inode_info *ei; |
ac27a0ec | 917 | |
e6b4f8da | 918 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
919 | if (!ei) |
920 | return NULL; | |
0b8e58a1 | 921 | |
ac27a0ec | 922 | ei->vfs_inode.i_version = 1; |
202ee5df | 923 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
924 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
925 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
926 | ext4_es_init_tree(&ei->i_es_tree); |
927 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 928 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 929 | ei->i_es_all_nr = 0; |
edaa53ca | 930 | ei->i_es_shk_nr = 0; |
dd475925 | 931 | ei->i_es_shrink_lblk = 0; |
d2a17637 MC |
932 | ei->i_reserved_data_blocks = 0; |
933 | ei->i_reserved_meta_blocks = 0; | |
934 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 935 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 936 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 937 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
938 | #ifdef CONFIG_QUOTA |
939 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 940 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 941 | #endif |
8aefcd55 | 942 | ei->jinode = NULL; |
2e8fa54e | 943 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 944 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
945 | ei->i_sync_tid = 0; |
946 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 947 | atomic_set(&ei->i_ioend_count, 0); |
e27f41e1 | 948 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 949 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
b30ab0e0 | 950 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
b7236e21 | 951 | ei->i_crypt_info = NULL; |
b30ab0e0 | 952 | #endif |
ac27a0ec DK |
953 | return &ei->vfs_inode; |
954 | } | |
955 | ||
7ff9c073 TT |
956 | static int ext4_drop_inode(struct inode *inode) |
957 | { | |
958 | int drop = generic_drop_inode(inode); | |
959 | ||
960 | trace_ext4_drop_inode(inode, drop); | |
961 | return drop; | |
962 | } | |
963 | ||
fa0d7e3d NP |
964 | static void ext4_i_callback(struct rcu_head *head) |
965 | { | |
966 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
967 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
968 | } | |
969 | ||
617ba13b | 970 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 971 | { |
9f7dd93d | 972 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
973 | ext4_msg(inode->i_sb, KERN_ERR, |
974 | "Inode %lu (%p): orphan list check failed!", | |
975 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
976 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
977 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
978 | true); | |
979 | dump_stack(); | |
980 | } | |
fa0d7e3d | 981 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
982 | } |
983 | ||
51cc5068 | 984 | static void init_once(void *foo) |
ac27a0ec | 985 | { |
617ba13b | 986 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 987 | |
a35afb83 | 988 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 989 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 990 | init_rwsem(&ei->i_data_sem); |
ea3d7209 | 991 | init_rwsem(&ei->i_mmap_sem); |
a35afb83 | 992 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
993 | } |
994 | ||
e67bc2b3 | 995 | static int __init init_inodecache(void) |
ac27a0ec | 996 | { |
617ba13b MC |
997 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
998 | sizeof(struct ext4_inode_info), | |
ac27a0ec | 999 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 1000 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 1001 | init_once); |
617ba13b | 1002 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1003 | return -ENOMEM; |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static void destroy_inodecache(void) | |
1008 | { | |
8c0a8537 KS |
1009 | /* |
1010 | * Make sure all delayed rcu free inodes are flushed before we | |
1011 | * destroy cache. | |
1012 | */ | |
1013 | rcu_barrier(); | |
617ba13b | 1014 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1015 | } |
1016 | ||
0930fcc1 | 1017 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1018 | { |
0930fcc1 | 1019 | invalidate_inode_buffers(inode); |
dbd5768f | 1020 | clear_inode(inode); |
9f754758 | 1021 | dquot_drop(inode); |
c2ea3fde | 1022 | ext4_discard_preallocations(inode); |
51865fda | 1023 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
1024 | if (EXT4_I(inode)->jinode) { |
1025 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1026 | EXT4_I(inode)->jinode); | |
1027 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1028 | EXT4_I(inode)->jinode = NULL; | |
1029 | } | |
b7236e21 TT |
1030 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
1031 | if (EXT4_I(inode)->i_crypt_info) | |
c936e1ec | 1032 | ext4_free_encryption_info(inode, EXT4_I(inode)->i_crypt_info); |
b7236e21 | 1033 | #endif |
ac27a0ec DK |
1034 | } |
1035 | ||
1b961ac0 | 1036 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1037 | u64 ino, u32 generation) |
ac27a0ec | 1038 | { |
ac27a0ec | 1039 | struct inode *inode; |
ac27a0ec | 1040 | |
617ba13b | 1041 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1042 | return ERR_PTR(-ESTALE); |
617ba13b | 1043 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1044 | return ERR_PTR(-ESTALE); |
1045 | ||
1046 | /* iget isn't really right if the inode is currently unallocated!! | |
1047 | * | |
617ba13b | 1048 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1049 | * deleted, so we should be safe. |
1050 | * | |
1051 | * Currently we don't know the generation for parent directory, so | |
1052 | * a generation of 0 means "accept any" | |
1053 | */ | |
f4bb2981 | 1054 | inode = ext4_iget_normal(sb, ino); |
1d1fe1ee DH |
1055 | if (IS_ERR(inode)) |
1056 | return ERR_CAST(inode); | |
1057 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1058 | iput(inode); |
1059 | return ERR_PTR(-ESTALE); | |
1060 | } | |
1b961ac0 CH |
1061 | |
1062 | return inode; | |
1063 | } | |
1064 | ||
1065 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1066 | int fh_len, int fh_type) |
1b961ac0 CH |
1067 | { |
1068 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1069 | ext4_nfs_get_inode); | |
1070 | } | |
1071 | ||
1072 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1073 | int fh_len, int fh_type) |
1b961ac0 CH |
1074 | { |
1075 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1076 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1077 | } |
1078 | ||
c39a7f84 TO |
1079 | /* |
1080 | * Try to release metadata pages (indirect blocks, directories) which are | |
1081 | * mapped via the block device. Since these pages could have journal heads | |
1082 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1083 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1084 | */ | |
0b8e58a1 AD |
1085 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1086 | gfp_t wait) | |
c39a7f84 TO |
1087 | { |
1088 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1089 | ||
1090 | WARN_ON(PageChecked(page)); | |
1091 | if (!page_has_buffers(page)) | |
1092 | return 0; | |
1093 | if (journal) | |
1094 | return jbd2_journal_try_to_free_buffers(journal, page, | |
d0164adc | 1095 | wait & ~__GFP_DIRECT_RECLAIM); |
c39a7f84 TO |
1096 | return try_to_free_buffers(page); |
1097 | } | |
1098 | ||
ac27a0ec | 1099 | #ifdef CONFIG_QUOTA |
689c958c LX |
1100 | static char *quotatypes[] = INITQFNAMES; |
1101 | #define QTYPE2NAME(t) (quotatypes[t]) | |
ac27a0ec | 1102 | |
617ba13b MC |
1103 | static int ext4_write_dquot(struct dquot *dquot); |
1104 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1105 | static int ext4_release_dquot(struct dquot *dquot); | |
1106 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1107 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1108 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1109 | struct path *path); |
ca0e05e4 | 1110 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1111 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1112 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1113 | size_t len, loff_t off); |
617ba13b | 1114 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1115 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1116 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1117 | unsigned int flags); | |
1118 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1119 | |
96c7e0d9 JK |
1120 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1121 | { | |
1122 | return EXT4_I(inode)->i_dquot; | |
1123 | } | |
1124 | ||
61e225dc | 1125 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1126 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1127 | .write_dquot = ext4_write_dquot, |
1128 | .acquire_dquot = ext4_acquire_dquot, | |
1129 | .release_dquot = ext4_release_dquot, | |
1130 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1131 | .write_info = ext4_write_info, |
1132 | .alloc_dquot = dquot_alloc, | |
1133 | .destroy_dquot = dquot_destroy, | |
040cb378 | 1134 | .get_projid = ext4_get_projid, |
ac27a0ec DK |
1135 | }; |
1136 | ||
0d54b217 | 1137 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1138 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1139 | .quota_off = ext4_quota_off, |
287a8095 | 1140 | .quota_sync = dquot_quota_sync, |
0a240339 | 1141 | .get_state = dquot_get_state, |
287a8095 CH |
1142 | .set_info = dquot_set_dqinfo, |
1143 | .get_dqblk = dquot_get_dqblk, | |
1144 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1145 | }; |
1146 | #endif | |
1147 | ||
ee9b6d61 | 1148 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1149 | .alloc_inode = ext4_alloc_inode, |
1150 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1151 | .write_inode = ext4_write_inode, |
1152 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1153 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1154 | .evict_inode = ext4_evict_inode, |
617ba13b | 1155 | .put_super = ext4_put_super, |
617ba13b | 1156 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1157 | .freeze_fs = ext4_freeze, |
1158 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1159 | .statfs = ext4_statfs, |
1160 | .remount_fs = ext4_remount, | |
617ba13b | 1161 | .show_options = ext4_show_options, |
ac27a0ec | 1162 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1163 | .quota_read = ext4_quota_read, |
1164 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1165 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1166 | #endif |
c39a7f84 | 1167 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1168 | }; |
1169 | ||
39655164 | 1170 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1171 | .fh_to_dentry = ext4_fh_to_dentry, |
1172 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1173 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1174 | }; |
1175 | ||
1176 | enum { | |
1177 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1178 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1179 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1180 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1181 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1182 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1183 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1184 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1185 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1186 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1187 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1188 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
923ae0ff | 1189 | Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, |
1449032b | 1190 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
a26f4992 | 1191 | Opt_lazytime, Opt_nolazytime, |
1449032b | 1192 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1193 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1194 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1195 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
c6d3d56d | 1196 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
ac27a0ec DK |
1197 | }; |
1198 | ||
a447c093 | 1199 | static const match_table_t tokens = { |
ac27a0ec DK |
1200 | {Opt_bsd_df, "bsddf"}, |
1201 | {Opt_minix_df, "minixdf"}, | |
1202 | {Opt_grpid, "grpid"}, | |
1203 | {Opt_grpid, "bsdgroups"}, | |
1204 | {Opt_nogrpid, "nogrpid"}, | |
1205 | {Opt_nogrpid, "sysvgroups"}, | |
1206 | {Opt_resgid, "resgid=%u"}, | |
1207 | {Opt_resuid, "resuid=%u"}, | |
1208 | {Opt_sb, "sb=%u"}, | |
1209 | {Opt_err_cont, "errors=continue"}, | |
1210 | {Opt_err_panic, "errors=panic"}, | |
1211 | {Opt_err_ro, "errors=remount-ro"}, | |
1212 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1213 | {Opt_debug, "debug"}, |
72578c33 TT |
1214 | {Opt_removed, "oldalloc"}, |
1215 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1216 | {Opt_user_xattr, "user_xattr"}, |
1217 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1218 | {Opt_acl, "acl"}, | |
1219 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1220 | {Opt_noload, "norecovery"}, |
5a916be1 | 1221 | {Opt_noload, "noload"}, |
72578c33 TT |
1222 | {Opt_removed, "nobh"}, |
1223 | {Opt_removed, "bh"}, | |
ac27a0ec | 1224 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1225 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1226 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1227 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1228 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1229 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1230 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1231 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1232 | {Opt_abort, "abort"}, |
1233 | {Opt_data_journal, "data=journal"}, | |
1234 | {Opt_data_ordered, "data=ordered"}, | |
1235 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1236 | {Opt_data_err_abort, "data_err=abort"}, |
1237 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1238 | {Opt_offusrjquota, "usrjquota="}, |
1239 | {Opt_usrjquota, "usrjquota=%s"}, | |
1240 | {Opt_offgrpjquota, "grpjquota="}, | |
1241 | {Opt_grpjquota, "grpjquota=%s"}, | |
1242 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1243 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1244 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1245 | {Opt_grpquota, "grpquota"}, |
1246 | {Opt_noquota, "noquota"}, | |
1247 | {Opt_quota, "quota"}, | |
1248 | {Opt_usrquota, "usrquota"}, | |
1249 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1250 | {Opt_barrier, "barrier"}, |
1251 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1252 | {Opt_i_version, "i_version"}, |
923ae0ff | 1253 | {Opt_dax, "dax"}, |
c9de560d | 1254 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1255 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1256 | {Opt_lazytime, "lazytime"}, |
1257 | {Opt_nolazytime, "nolazytime"}, | |
dd919b98 | 1258 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1259 | {Opt_removed, "mblk_io_submit"}, |
1260 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1261 | {Opt_block_validity, "block_validity"}, |
1262 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1263 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1264 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1265 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1266 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1267 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1268 | {Opt_dioread_nolock, "dioread_nolock"}, |
1269 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1270 | {Opt_discard, "discard"}, |
1271 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1272 | {Opt_init_itable, "init_itable=%u"}, |
1273 | {Opt_init_itable, "init_itable"}, | |
1274 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1275 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1276 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
c7198b9c TT |
1277 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1278 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1279 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1280 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1281 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1282 | {Opt_err, NULL}, |
ac27a0ec DK |
1283 | }; |
1284 | ||
617ba13b | 1285 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1286 | { |
617ba13b | 1287 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1288 | char *options = (char *) *data; |
1289 | ||
1290 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1291 | return 1; /* Default location */ | |
0b8e58a1 | 1292 | |
ac27a0ec | 1293 | options += 3; |
0b8e58a1 | 1294 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1295 | sb_block = simple_strtoul(options, &options, 0); |
1296 | if (*options && *options != ',') { | |
4776004f | 1297 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1298 | (char *) *data); |
1299 | return 1; | |
1300 | } | |
1301 | if (*options == ',') | |
1302 | options++; | |
1303 | *data = (void *) options; | |
0b8e58a1 | 1304 | |
ac27a0ec DK |
1305 | return sb_block; |
1306 | } | |
1307 | ||
b3881f74 | 1308 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1309 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1310 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1311 | |
56c50f11 DM |
1312 | #ifdef CONFIG_QUOTA |
1313 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1314 | { | |
1315 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1316 | char *qname; | |
03dafb5f | 1317 | int ret = -1; |
56c50f11 DM |
1318 | |
1319 | if (sb_any_quota_loaded(sb) && | |
1320 | !sbi->s_qf_names[qtype]) { | |
1321 | ext4_msg(sb, KERN_ERR, | |
1322 | "Cannot change journaled " | |
1323 | "quota options when quota turned on"); | |
57f73c2c | 1324 | return -1; |
56c50f11 | 1325 | } |
e2b911c5 | 1326 | if (ext4_has_feature_quota(sb)) { |
262b4662 JK |
1327 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " |
1328 | "when QUOTA feature is enabled"); | |
1329 | return -1; | |
1330 | } | |
56c50f11 DM |
1331 | qname = match_strdup(args); |
1332 | if (!qname) { | |
1333 | ext4_msg(sb, KERN_ERR, | |
1334 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1335 | return -1; |
56c50f11 | 1336 | } |
03dafb5f CG |
1337 | if (sbi->s_qf_names[qtype]) { |
1338 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1339 | ret = 1; | |
1340 | else | |
1341 | ext4_msg(sb, KERN_ERR, | |
1342 | "%s quota file already specified", | |
1343 | QTYPE2NAME(qtype)); | |
1344 | goto errout; | |
56c50f11 | 1345 | } |
03dafb5f | 1346 | if (strchr(qname, '/')) { |
56c50f11 DM |
1347 | ext4_msg(sb, KERN_ERR, |
1348 | "quotafile must be on filesystem root"); | |
03dafb5f | 1349 | goto errout; |
56c50f11 | 1350 | } |
03dafb5f | 1351 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1352 | set_opt(sb, QUOTA); |
56c50f11 | 1353 | return 1; |
03dafb5f CG |
1354 | errout: |
1355 | kfree(qname); | |
1356 | return ret; | |
56c50f11 DM |
1357 | } |
1358 | ||
1359 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1360 | { | |
1361 | ||
1362 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1363 | ||
1364 | if (sb_any_quota_loaded(sb) && | |
1365 | sbi->s_qf_names[qtype]) { | |
1366 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1367 | " when quota turned on"); | |
57f73c2c | 1368 | return -1; |
56c50f11 | 1369 | } |
03dafb5f | 1370 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1371 | sbi->s_qf_names[qtype] = NULL; |
1372 | return 1; | |
1373 | } | |
1374 | #endif | |
1375 | ||
26092bf5 TT |
1376 | #define MOPT_SET 0x0001 |
1377 | #define MOPT_CLEAR 0x0002 | |
1378 | #define MOPT_NOSUPPORT 0x0004 | |
1379 | #define MOPT_EXPLICIT 0x0008 | |
1380 | #define MOPT_CLEAR_ERR 0x0010 | |
1381 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1382 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1383 | #define MOPT_Q 0 |
1384 | #define MOPT_QFMT 0x0040 | |
1385 | #else | |
1386 | #define MOPT_Q MOPT_NOSUPPORT | |
1387 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1388 | #endif |
26092bf5 | 1389 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1390 | #define MOPT_NO_EXT2 0x0100 |
1391 | #define MOPT_NO_EXT3 0x0200 | |
1392 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1393 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1394 | |
1395 | static const struct mount_opts { | |
1396 | int token; | |
1397 | int mount_opt; | |
1398 | int flags; | |
1399 | } ext4_mount_opts[] = { | |
1400 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1401 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1402 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1403 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1404 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1405 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1406 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1407 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1408 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1409 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1410 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1411 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1412 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1413 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1414 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1415 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1416 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1417 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1418 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1419 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1420 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1421 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1422 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1423 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1424 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1425 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1426 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c TT |
1427 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
1428 | MOPT_NO_EXT2 | MOPT_SET}, | |
1429 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, | |
1430 | MOPT_NO_EXT2 | MOPT_CLEAR}, | |
26092bf5 TT |
1431 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1432 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1433 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1434 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1435 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1436 | {Opt_commit, 0, MOPT_GTE0}, | |
1437 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1438 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1439 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1440 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1441 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1442 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1443 | {Opt_resuid, 0, MOPT_GTE0}, |
1444 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1445 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1446 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1447 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1448 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1449 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1450 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1451 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1452 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1453 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1454 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1455 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1456 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1457 | #else |
26092bf5 TT |
1458 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1459 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1460 | #endif |
26092bf5 TT |
1461 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1462 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1463 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1464 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1465 | MOPT_SET | MOPT_Q}, | |
1466 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1467 | MOPT_SET | MOPT_Q}, | |
1468 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1469 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1470 | {Opt_usrjquota, 0, MOPT_Q}, | |
1471 | {Opt_grpjquota, 0, MOPT_Q}, | |
1472 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1473 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1474 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1475 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1476 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1477 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1478 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
26092bf5 TT |
1479 | {Opt_err, 0, 0} |
1480 | }; | |
1481 | ||
1482 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1483 | substring_t *args, unsigned long *journal_devnum, | |
1484 | unsigned int *journal_ioprio, int is_remount) | |
1485 | { | |
1486 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1487 | const struct mount_opts *m; | |
08cefc7a EB |
1488 | kuid_t uid; |
1489 | kgid_t gid; | |
26092bf5 TT |
1490 | int arg = 0; |
1491 | ||
57f73c2c TT |
1492 | #ifdef CONFIG_QUOTA |
1493 | if (token == Opt_usrjquota) | |
1494 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1495 | else if (token == Opt_grpjquota) | |
1496 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1497 | else if (token == Opt_offusrjquota) | |
1498 | return clear_qf_name(sb, USRQUOTA); | |
1499 | else if (token == Opt_offgrpjquota) | |
1500 | return clear_qf_name(sb, GRPQUOTA); | |
1501 | #endif | |
26092bf5 | 1502 | switch (token) { |
f7048605 TT |
1503 | case Opt_noacl: |
1504 | case Opt_nouser_xattr: | |
1505 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1506 | break; | |
26092bf5 TT |
1507 | case Opt_sb: |
1508 | return 1; /* handled by get_sb_block() */ | |
1509 | case Opt_removed: | |
5f3633e3 | 1510 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1511 | return 1; |
26092bf5 TT |
1512 | case Opt_abort: |
1513 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1514 | return 1; | |
1515 | case Opt_i_version: | |
1516 | sb->s_flags |= MS_I_VERSION; | |
1517 | return 1; | |
a26f4992 TT |
1518 | case Opt_lazytime: |
1519 | sb->s_flags |= MS_LAZYTIME; | |
1520 | return 1; | |
1521 | case Opt_nolazytime: | |
1522 | sb->s_flags &= ~MS_LAZYTIME; | |
1523 | return 1; | |
26092bf5 TT |
1524 | } |
1525 | ||
5f3633e3 JK |
1526 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1527 | if (token == m->token) | |
1528 | break; | |
1529 | ||
1530 | if (m->token == Opt_err) { | |
1531 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1532 | "or missing value", opt); | |
1533 | return -1; | |
1534 | } | |
1535 | ||
8dc0aa8c TT |
1536 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1537 | ext4_msg(sb, KERN_ERR, | |
1538 | "Mount option \"%s\" incompatible with ext2", opt); | |
1539 | return -1; | |
1540 | } | |
1541 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1542 | ext4_msg(sb, KERN_ERR, | |
1543 | "Mount option \"%s\" incompatible with ext3", opt); | |
1544 | return -1; | |
1545 | } | |
1546 | ||
ad4eec61 | 1547 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1548 | return -1; |
1549 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1550 | return -1; | |
c93cf2d7 DM |
1551 | if (m->flags & MOPT_EXPLICIT) { |
1552 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1553 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1554 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1555 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1556 | } else |
1557 | return -1; | |
1558 | } | |
5f3633e3 JK |
1559 | if (m->flags & MOPT_CLEAR_ERR) |
1560 | clear_opt(sb, ERRORS_MASK); | |
1561 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1562 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1563 | "options when quota turned on"); | |
1564 | return -1; | |
1565 | } | |
1566 | ||
1567 | if (m->flags & MOPT_NOSUPPORT) { | |
1568 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1569 | } else if (token == Opt_commit) { | |
1570 | if (arg == 0) | |
1571 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1572 | sbi->s_commit_interval = HZ * arg; | |
1573 | } else if (token == Opt_max_batch_time) { | |
5f3633e3 JK |
1574 | sbi->s_max_batch_time = arg; |
1575 | } else if (token == Opt_min_batch_time) { | |
1576 | sbi->s_min_batch_time = arg; | |
1577 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1578 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1579 | ext4_msg(sb, KERN_ERR, | |
1580 | "EXT4-fs: inode_readahead_blks must be " | |
1581 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1582 | return -1; |
5f3633e3 JK |
1583 | } |
1584 | sbi->s_inode_readahead_blks = arg; | |
1585 | } else if (token == Opt_init_itable) { | |
1586 | set_opt(sb, INIT_INODE_TABLE); | |
1587 | if (!args->from) | |
1588 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1589 | sbi->s_li_wait_mult = arg; | |
1590 | } else if (token == Opt_max_dir_size_kb) { | |
1591 | sbi->s_max_dir_size_kb = arg; | |
1592 | } else if (token == Opt_stripe) { | |
1593 | sbi->s_stripe = arg; | |
1594 | } else if (token == Opt_resuid) { | |
1595 | uid = make_kuid(current_user_ns(), arg); | |
1596 | if (!uid_valid(uid)) { | |
1597 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1598 | return -1; |
1599 | } | |
5f3633e3 JK |
1600 | sbi->s_resuid = uid; |
1601 | } else if (token == Opt_resgid) { | |
1602 | gid = make_kgid(current_user_ns(), arg); | |
1603 | if (!gid_valid(gid)) { | |
1604 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1605 | return -1; | |
1606 | } | |
1607 | sbi->s_resgid = gid; | |
1608 | } else if (token == Opt_journal_dev) { | |
1609 | if (is_remount) { | |
1610 | ext4_msg(sb, KERN_ERR, | |
1611 | "Cannot specify journal on remount"); | |
1612 | return -1; | |
1613 | } | |
1614 | *journal_devnum = arg; | |
ad4eec61 ES |
1615 | } else if (token == Opt_journal_path) { |
1616 | char *journal_path; | |
1617 | struct inode *journal_inode; | |
1618 | struct path path; | |
1619 | int error; | |
1620 | ||
1621 | if (is_remount) { | |
1622 | ext4_msg(sb, KERN_ERR, | |
1623 | "Cannot specify journal on remount"); | |
1624 | return -1; | |
1625 | } | |
1626 | journal_path = match_strdup(&args[0]); | |
1627 | if (!journal_path) { | |
1628 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1629 | "journal device string"); | |
1630 | return -1; | |
1631 | } | |
1632 | ||
1633 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1634 | if (error) { | |
1635 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1636 | "journal device path: error %d", error); | |
1637 | kfree(journal_path); | |
1638 | return -1; | |
1639 | } | |
1640 | ||
2b0143b5 | 1641 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1642 | if (!S_ISBLK(journal_inode->i_mode)) { |
1643 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1644 | "is not a block device", journal_path); | |
1645 | path_put(&path); | |
1646 | kfree(journal_path); | |
1647 | return -1; | |
1648 | } | |
1649 | ||
1650 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1651 | path_put(&path); | |
1652 | kfree(journal_path); | |
5f3633e3 JK |
1653 | } else if (token == Opt_journal_ioprio) { |
1654 | if (arg > 7) { | |
1655 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1656 | " (must be 0-7)"); | |
1657 | return -1; | |
1658 | } | |
1659 | *journal_ioprio = | |
1660 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1661 | } else if (token == Opt_test_dummy_encryption) { |
1662 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1663 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1664 | ext4_msg(sb, KERN_WARNING, | |
1665 | "Test dummy encryption mode enabled"); | |
1666 | #else | |
1667 | ext4_msg(sb, KERN_WARNING, | |
1668 | "Test dummy encryption mount option ignored"); | |
1669 | #endif | |
5f3633e3 JK |
1670 | } else if (m->flags & MOPT_DATAJ) { |
1671 | if (is_remount) { | |
1672 | if (!sbi->s_journal) | |
1673 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1674 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1675 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1676 | "Cannot change data mode on remount"); |
26092bf5 | 1677 | return -1; |
ac27a0ec | 1678 | } |
26092bf5 | 1679 | } else { |
5f3633e3 JK |
1680 | clear_opt(sb, DATA_FLAGS); |
1681 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1682 | } |
5f3633e3 JK |
1683 | #ifdef CONFIG_QUOTA |
1684 | } else if (m->flags & MOPT_QFMT) { | |
1685 | if (sb_any_quota_loaded(sb) && | |
1686 | sbi->s_jquota_fmt != m->mount_opt) { | |
1687 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1688 | "quota options when quota turned on"); | |
1689 | return -1; | |
1690 | } | |
e2b911c5 | 1691 | if (ext4_has_feature_quota(sb)) { |
262b4662 JK |
1692 | ext4_msg(sb, KERN_ERR, |
1693 | "Cannot set journaled quota options " | |
1694 | "when QUOTA feature is enabled"); | |
1695 | return -1; | |
1696 | } | |
5f3633e3 | 1697 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 1698 | #endif |
923ae0ff | 1699 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
1700 | #ifdef CONFIG_FS_DAX |
1701 | ext4_msg(sb, KERN_WARNING, | |
1702 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
1703 | sbi->s_mount_opt |= m->mount_opt; | |
1704 | #else | |
923ae0ff RZ |
1705 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
1706 | return -1; | |
5f3633e3 JK |
1707 | #endif |
1708 | } else { | |
1709 | if (!args->from) | |
1710 | arg = 1; | |
1711 | if (m->flags & MOPT_CLEAR) | |
1712 | arg = !arg; | |
1713 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1714 | ext4_msg(sb, KERN_WARNING, | |
1715 | "buggy handling of option %s", opt); | |
1716 | WARN_ON(1); | |
1717 | return -1; | |
1718 | } | |
1719 | if (arg != 0) | |
1720 | sbi->s_mount_opt |= m->mount_opt; | |
1721 | else | |
1722 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1723 | } |
5f3633e3 | 1724 | return 1; |
26092bf5 TT |
1725 | } |
1726 | ||
1727 | static int parse_options(char *options, struct super_block *sb, | |
1728 | unsigned long *journal_devnum, | |
1729 | unsigned int *journal_ioprio, | |
1730 | int is_remount) | |
1731 | { | |
1732 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1733 | char *p; | |
1734 | substring_t args[MAX_OPT_ARGS]; | |
1735 | int token; | |
1736 | ||
1737 | if (!options) | |
1738 | return 1; | |
1739 | ||
1740 | while ((p = strsep(&options, ",")) != NULL) { | |
1741 | if (!*p) | |
1742 | continue; | |
1743 | /* | |
1744 | * Initialize args struct so we know whether arg was | |
1745 | * found; some options take optional arguments. | |
1746 | */ | |
caecd0af | 1747 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1748 | token = match_token(p, tokens, args); |
1749 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1750 | journal_ioprio, is_remount) < 0) | |
1751 | return 0; | |
ac27a0ec DK |
1752 | } |
1753 | #ifdef CONFIG_QUOTA | |
e2b911c5 | 1754 | if (ext4_has_feature_quota(sb) && |
262b4662 JK |
1755 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { |
1756 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " | |
1757 | "feature is enabled"); | |
1758 | return 0; | |
1759 | } | |
ac27a0ec | 1760 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
482a7425 | 1761 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1762 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1763 | |
482a7425 | 1764 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1765 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1766 | |
56c50f11 | 1767 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1768 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1769 | "format mixing"); | |
ac27a0ec DK |
1770 | return 0; |
1771 | } | |
1772 | ||
1773 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1774 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1775 | "not specified"); | |
ac27a0ec DK |
1776 | return 0; |
1777 | } | |
ac27a0ec DK |
1778 | } |
1779 | #endif | |
261cb20c JK |
1780 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1781 | int blocksize = | |
1782 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1783 | ||
1784 | if (blocksize < PAGE_CACHE_SIZE) { | |
1785 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
1786 | "dioread_nolock if block size != PAGE_SIZE"); | |
1787 | return 0; | |
1788 | } | |
1789 | } | |
d4f76107 JK |
1790 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
1791 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
1792 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " | |
1793 | "in data=ordered mode"); | |
1794 | return 0; | |
1795 | } | |
ac27a0ec DK |
1796 | return 1; |
1797 | } | |
1798 | ||
2adf6da8 TT |
1799 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1800 | struct super_block *sb) | |
1801 | { | |
1802 | #if defined(CONFIG_QUOTA) | |
1803 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1804 | ||
1805 | if (sbi->s_jquota_fmt) { | |
1806 | char *fmtname = ""; | |
1807 | ||
1808 | switch (sbi->s_jquota_fmt) { | |
1809 | case QFMT_VFS_OLD: | |
1810 | fmtname = "vfsold"; | |
1811 | break; | |
1812 | case QFMT_VFS_V0: | |
1813 | fmtname = "vfsv0"; | |
1814 | break; | |
1815 | case QFMT_VFS_V1: | |
1816 | fmtname = "vfsv1"; | |
1817 | break; | |
1818 | } | |
1819 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1820 | } | |
1821 | ||
1822 | if (sbi->s_qf_names[USRQUOTA]) | |
a068acf2 | 1823 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
2adf6da8 TT |
1824 | |
1825 | if (sbi->s_qf_names[GRPQUOTA]) | |
a068acf2 | 1826 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
2adf6da8 TT |
1827 | #endif |
1828 | } | |
1829 | ||
5a916be1 TT |
1830 | static const char *token2str(int token) |
1831 | { | |
50df9fd5 | 1832 | const struct match_token *t; |
5a916be1 TT |
1833 | |
1834 | for (t = tokens; t->token != Opt_err; t++) | |
1835 | if (t->token == token && !strchr(t->pattern, '=')) | |
1836 | break; | |
1837 | return t->pattern; | |
1838 | } | |
1839 | ||
2adf6da8 TT |
1840 | /* |
1841 | * Show an option if | |
1842 | * - it's set to a non-default value OR | |
1843 | * - if the per-sb default is different from the global default | |
1844 | */ | |
66acdcf4 TT |
1845 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1846 | int nodefs) | |
2adf6da8 | 1847 | { |
2adf6da8 TT |
1848 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1849 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1850 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1851 | const struct mount_opts *m; |
66acdcf4 | 1852 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1853 | |
66acdcf4 TT |
1854 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1855 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1856 | |
1857 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1858 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1859 | ||
1860 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1861 | int want_set = m->flags & MOPT_SET; | |
1862 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1863 | (m->flags & MOPT_CLEAR_ERR)) | |
1864 | continue; | |
66acdcf4 | 1865 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1866 | continue; /* skip if same as the default */ |
1867 | if ((want_set && | |
1868 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1869 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1870 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1871 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1872 | } |
5a916be1 | 1873 | |
08cefc7a | 1874 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1875 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1876 | SEQ_OPTS_PRINT("resuid=%u", |
1877 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1878 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1879 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1880 | SEQ_OPTS_PRINT("resgid=%u", |
1881 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1882 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1883 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1884 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1885 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1886 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1887 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1888 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1889 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1890 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1891 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1892 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1893 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1894 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1895 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1896 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1897 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1898 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1899 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1900 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1901 | SEQ_OPTS_PUTS("data=journal"); | |
1902 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1903 | SEQ_OPTS_PUTS("data=ordered"); | |
1904 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1905 | SEQ_OPTS_PUTS("data=writeback"); | |
1906 | } | |
66acdcf4 TT |
1907 | if (nodefs || |
1908 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1909 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1910 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1911 | |
66acdcf4 TT |
1912 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1913 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1914 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1915 | if (nodefs || sbi->s_max_dir_size_kb) |
1916 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1917 | |
1918 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1919 | return 0; |
1920 | } | |
1921 | ||
66acdcf4 TT |
1922 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1923 | { | |
1924 | return _ext4_show_options(seq, root->d_sb, 0); | |
1925 | } | |
1926 | ||
ebd173be | 1927 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
1928 | { |
1929 | struct super_block *sb = seq->private; | |
1930 | int rc; | |
1931 | ||
1932 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1933 | rc = _ext4_show_options(seq, sb, 1); | |
1934 | seq_puts(seq, "\n"); | |
1935 | return rc; | |
1936 | } | |
1937 | ||
617ba13b | 1938 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1939 | int read_only) |
1940 | { | |
617ba13b | 1941 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1942 | int res = 0; |
1943 | ||
617ba13b | 1944 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1945 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1946 | "forcing read-only mode"); | |
ac27a0ec DK |
1947 | res = MS_RDONLY; |
1948 | } | |
1949 | if (read_only) | |
281b5995 | 1950 | goto done; |
617ba13b | 1951 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1952 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1953 | "running e2fsck is recommended"); | |
c8b459f4 | 1954 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
1955 | ext4_msg(sb, KERN_WARNING, |
1956 | "warning: mounting fs with errors, " | |
1957 | "running e2fsck is recommended"); | |
ed3ce80a | 1958 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1959 | le16_to_cpu(es->s_mnt_count) >= |
1960 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1961 | ext4_msg(sb, KERN_WARNING, |
1962 | "warning: maximal mount count reached, " | |
1963 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1964 | else if (le32_to_cpu(es->s_checkinterval) && |
1965 | (le32_to_cpu(es->s_lastcheck) + | |
1966 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1967 | ext4_msg(sb, KERN_WARNING, |
1968 | "warning: checktime reached, " | |
1969 | "running e2fsck is recommended"); | |
0b8e58a1 | 1970 | if (!sbi->s_journal) |
0390131b | 1971 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1972 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1973 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1974 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1975 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1976 | ext4_update_dynamic_rev(sb); |
0390131b | 1977 | if (sbi->s_journal) |
e2b911c5 | 1978 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 1979 | |
e2d67052 | 1980 | ext4_commit_super(sb, 1); |
281b5995 | 1981 | done: |
ac27a0ec | 1982 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1983 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1984 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1985 | sb->s_blocksize, |
1986 | sbi->s_groups_count, | |
617ba13b MC |
1987 | EXT4_BLOCKS_PER_GROUP(sb), |
1988 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1989 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1990 | |
7abc52c2 | 1991 | cleancache_init_fs(sb); |
ac27a0ec DK |
1992 | return res; |
1993 | } | |
1994 | ||
117fff10 TT |
1995 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1996 | { | |
1997 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1998 | struct flex_groups *new_groups; | |
1999 | int size; | |
2000 | ||
2001 | if (!sbi->s_log_groups_per_flex) | |
2002 | return 0; | |
2003 | ||
2004 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2005 | if (size <= sbi->s_flex_groups_allocated) | |
2006 | return 0; | |
2007 | ||
2008 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
2009 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
2010 | if (!new_groups) { | |
2011 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2012 | size / (int) sizeof(struct flex_groups)); | |
2013 | return -ENOMEM; | |
2014 | } | |
2015 | ||
2016 | if (sbi->s_flex_groups) { | |
2017 | memcpy(new_groups, sbi->s_flex_groups, | |
2018 | (sbi->s_flex_groups_allocated * | |
2019 | sizeof(struct flex_groups))); | |
b93b41d4 | 2020 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2021 | } |
2022 | sbi->s_flex_groups = new_groups; | |
2023 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2024 | return 0; | |
2025 | } | |
2026 | ||
772cb7c8 JS |
2027 | static int ext4_fill_flex_info(struct super_block *sb) |
2028 | { | |
2029 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2030 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2031 | ext4_group_t flex_group; |
117fff10 | 2032 | int i, err; |
772cb7c8 | 2033 | |
503358ae | 2034 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2035 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2036 | sbi->s_log_groups_per_flex = 0; |
2037 | return 1; | |
2038 | } | |
2039 | ||
117fff10 TT |
2040 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2041 | if (err) | |
9933fc0a | 2042 | goto failed; |
772cb7c8 | 2043 | |
772cb7c8 | 2044 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2045 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2046 | |
2047 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2048 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2049 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2050 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2051 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2052 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2053 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2054 | } |
2055 | ||
2056 | return 1; | |
2057 | failed: | |
2058 | return 0; | |
2059 | } | |
2060 | ||
e2b911c5 | 2061 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2062 | struct ext4_group_desc *gdp) |
717d50e4 | 2063 | { |
feb0ab32 | 2064 | int offset; |
717d50e4 | 2065 | __u16 crc = 0; |
feb0ab32 | 2066 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2067 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2068 | |
9aa5d32b | 2069 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2070 | /* Use new metadata_csum algorithm */ |
d6a77105 | 2071 | __le16 save_csum; |
feb0ab32 DW |
2072 | __u32 csum32; |
2073 | ||
d6a77105 | 2074 | save_csum = gdp->bg_checksum; |
feb0ab32 DW |
2075 | gdp->bg_checksum = 0; |
2076 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2077 | sizeof(le_group)); | |
2078 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2079 | sbi->s_desc_size); | |
d6a77105 | 2080 | gdp->bg_checksum = save_csum; |
feb0ab32 DW |
2081 | |
2082 | crc = csum32 & 0xFFFF; | |
2083 | goto out; | |
717d50e4 AD |
2084 | } |
2085 | ||
feb0ab32 | 2086 | /* old crc16 code */ |
e2b911c5 | 2087 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2088 | return 0; |
2089 | ||
feb0ab32 DW |
2090 | offset = offsetof(struct ext4_group_desc, bg_checksum); |
2091 | ||
2092 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2093 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2094 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2095 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2096 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2097 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2098 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2099 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2100 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2101 | offset); | |
2102 | ||
2103 | out: | |
717d50e4 AD |
2104 | return cpu_to_le16(crc); |
2105 | } | |
2106 | ||
feb0ab32 | 2107 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2108 | struct ext4_group_desc *gdp) |
2109 | { | |
feb0ab32 | 2110 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2111 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2112 | return 0; |
2113 | ||
2114 | return 1; | |
2115 | } | |
2116 | ||
feb0ab32 DW |
2117 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2118 | struct ext4_group_desc *gdp) | |
2119 | { | |
2120 | if (!ext4_has_group_desc_csum(sb)) | |
2121 | return; | |
e2b911c5 | 2122 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2123 | } |
2124 | ||
ac27a0ec | 2125 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2126 | static int ext4_check_descriptors(struct super_block *sb, |
2127 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2128 | { |
617ba13b MC |
2129 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2130 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2131 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2132 | ext4_fsblk_t block_bitmap; |
2133 | ext4_fsblk_t inode_bitmap; | |
2134 | ext4_fsblk_t inode_table; | |
ce421581 | 2135 | int flexbg_flag = 0; |
bfff6873 | 2136 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2137 | |
e2b911c5 | 2138 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2139 | flexbg_flag = 1; |
2140 | ||
af5bc92d | 2141 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2142 | |
197cd65a AM |
2143 | for (i = 0; i < sbi->s_groups_count; i++) { |
2144 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2145 | ||
ce421581 | 2146 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2147 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2148 | else |
2149 | last_block = first_block + | |
617ba13b | 2150 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2151 | |
bfff6873 LC |
2152 | if ((grp == sbi->s_groups_count) && |
2153 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2154 | grp = i; | |
2155 | ||
8fadc143 | 2156 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2157 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2158 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2159 | "Block bitmap for group %u not in group " |
b31e1552 | 2160 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2161 | return 0; |
2162 | } | |
8fadc143 | 2163 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2164 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2165 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2166 | "Inode bitmap for group %u not in group " |
b31e1552 | 2167 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2168 | return 0; |
2169 | } | |
8fadc143 | 2170 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2171 | if (inode_table < first_block || |
2b2d6d01 | 2172 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2173 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2174 | "Inode table for group %u not in group " |
b31e1552 | 2175 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2176 | return 0; |
2177 | } | |
955ce5f5 | 2178 | ext4_lock_group(sb, i); |
feb0ab32 | 2179 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2180 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2181 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2182 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2183 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
7ee1ec4c | 2184 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2185 | ext4_unlock_group(sb, i); |
8a266467 | 2186 | return 0; |
7ee1ec4c | 2187 | } |
717d50e4 | 2188 | } |
955ce5f5 | 2189 | ext4_unlock_group(sb, i); |
ce421581 JS |
2190 | if (!flexbg_flag) |
2191 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2192 | } |
bfff6873 LC |
2193 | if (NULL != first_not_zeroed) |
2194 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2195 | return 1; |
2196 | } | |
2197 | ||
617ba13b | 2198 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2199 | * the superblock) which were deleted from all directories, but held open by |
2200 | * a process at the time of a crash. We walk the list and try to delete these | |
2201 | * inodes at recovery time (only with a read-write filesystem). | |
2202 | * | |
2203 | * In order to keep the orphan inode chain consistent during traversal (in | |
2204 | * case of crash during recovery), we link each inode into the superblock | |
2205 | * orphan list_head and handle it the same way as an inode deletion during | |
2206 | * normal operation (which journals the operations for us). | |
2207 | * | |
2208 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2209 | * accidentally point at an in-use or already deleted inode. The worst that | |
2210 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2211 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2212 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2213 | * inode cleanup for us, so we can safely abort without any further action. | |
2214 | */ | |
2b2d6d01 TT |
2215 | static void ext4_orphan_cleanup(struct super_block *sb, |
2216 | struct ext4_super_block *es) | |
ac27a0ec DK |
2217 | { |
2218 | unsigned int s_flags = sb->s_flags; | |
2219 | int nr_orphans = 0, nr_truncates = 0; | |
2220 | #ifdef CONFIG_QUOTA | |
2221 | int i; | |
2222 | #endif | |
2223 | if (!es->s_last_orphan) { | |
2224 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2225 | return; | |
2226 | } | |
2227 | ||
a8f48a95 | 2228 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2229 | ext4_msg(sb, KERN_ERR, "write access " |
2230 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2231 | return; |
2232 | } | |
2233 | ||
d39195c3 AG |
2234 | /* Check if feature set would not allow a r/w mount */ |
2235 | if (!ext4_feature_set_ok(sb, 0)) { | |
2236 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2237 | "unknown ROCOMPAT features"); | |
2238 | return; | |
2239 | } | |
2240 | ||
617ba13b | 2241 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2242 | /* don't clear list on RO mount w/ errors */ |
2243 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2244 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2245 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2246 | es->s_last_orphan = 0; |
2247 | } | |
ac27a0ec DK |
2248 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2249 | return; | |
2250 | } | |
2251 | ||
2252 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2253 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2254 | sb->s_flags &= ~MS_RDONLY; |
2255 | } | |
2256 | #ifdef CONFIG_QUOTA | |
2257 | /* Needed for iput() to work correctly and not trash data */ | |
2258 | sb->s_flags |= MS_ACTIVE; | |
2259 | /* Turn on quotas so that they are updated correctly */ | |
a2d4a646 | 2260 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2261 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2262 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2263 | if (ret < 0) |
b31e1552 ES |
2264 | ext4_msg(sb, KERN_ERR, |
2265 | "Cannot turn on journaled " | |
2266 | "quota: error %d", ret); | |
ac27a0ec DK |
2267 | } |
2268 | } | |
2269 | #endif | |
2270 | ||
2271 | while (es->s_last_orphan) { | |
2272 | struct inode *inode; | |
2273 | ||
97bd42b9 JB |
2274 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2275 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2276 | es->s_last_orphan = 0; |
2277 | break; | |
2278 | } | |
2279 | ||
617ba13b | 2280 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2281 | dquot_initialize(inode); |
ac27a0ec | 2282 | if (inode->i_nlink) { |
566370a2 PT |
2283 | if (test_opt(sb, DEBUG)) |
2284 | ext4_msg(sb, KERN_DEBUG, | |
2285 | "%s: truncating inode %lu to %lld bytes", | |
2286 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2287 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2288 | inode->i_ino, inode->i_size); |
5955102c | 2289 | inode_lock(inode); |
55f252c9 | 2290 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
617ba13b | 2291 | ext4_truncate(inode); |
5955102c | 2292 | inode_unlock(inode); |
ac27a0ec DK |
2293 | nr_truncates++; |
2294 | } else { | |
566370a2 PT |
2295 | if (test_opt(sb, DEBUG)) |
2296 | ext4_msg(sb, KERN_DEBUG, | |
2297 | "%s: deleting unreferenced inode %lu", | |
2298 | __func__, inode->i_ino); | |
ac27a0ec DK |
2299 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2300 | inode->i_ino); | |
2301 | nr_orphans++; | |
2302 | } | |
2303 | iput(inode); /* The delete magic happens here! */ | |
2304 | } | |
2305 | ||
2b2d6d01 | 2306 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2307 | |
2308 | if (nr_orphans) | |
b31e1552 ES |
2309 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2310 | PLURAL(nr_orphans)); | |
ac27a0ec | 2311 | if (nr_truncates) |
b31e1552 ES |
2312 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2313 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2314 | #ifdef CONFIG_QUOTA |
2315 | /* Turn quotas off */ | |
a2d4a646 | 2316 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
ac27a0ec | 2317 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 2318 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2319 | } |
2320 | #endif | |
2321 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2322 | } | |
0b8e58a1 | 2323 | |
cd2291a4 ES |
2324 | /* |
2325 | * Maximal extent format file size. | |
2326 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2327 | * extent format containers, within a sector_t, and within i_blocks | |
2328 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2329 | * so that won't be a limiting factor. | |
2330 | * | |
f17722f9 LC |
2331 | * However there is other limiting factor. We do store extents in the form |
2332 | * of starting block and length, hence the resulting length of the extent | |
2333 | * covering maximum file size must fit into on-disk format containers as | |
2334 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2335 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2336 | * | |
cd2291a4 ES |
2337 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2338 | */ | |
f287a1a5 | 2339 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2340 | { |
2341 | loff_t res; | |
2342 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2343 | ||
2344 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2345 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2346 | /* |
90c699a9 | 2347 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2348 | * i_block represent total blocks in 512 bytes |
2349 | * 32 == size of vfs inode i_blocks * 8 | |
2350 | */ | |
2351 | upper_limit = (1LL << 32) - 1; | |
2352 | ||
2353 | /* total blocks in file system block size */ | |
2354 | upper_limit >>= (blkbits - 9); | |
2355 | upper_limit <<= blkbits; | |
2356 | } | |
2357 | ||
f17722f9 LC |
2358 | /* |
2359 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2360 | * by one fs block, so ee_len can cover the extent of maximum file | |
2361 | * size | |
2362 | */ | |
2363 | res = (1LL << 32) - 1; | |
cd2291a4 | 2364 | res <<= blkbits; |
cd2291a4 ES |
2365 | |
2366 | /* Sanity check against vm- & vfs- imposed limits */ | |
2367 | if (res > upper_limit) | |
2368 | res = upper_limit; | |
2369 | ||
2370 | return res; | |
2371 | } | |
ac27a0ec | 2372 | |
ac27a0ec | 2373 | /* |
cd2291a4 | 2374 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2375 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2376 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2377 | */ |
f287a1a5 | 2378 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2379 | { |
617ba13b | 2380 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2381 | int meta_blocks; |
2382 | loff_t upper_limit; | |
0b8e58a1 AD |
2383 | /* This is calculated to be the largest file size for a dense, block |
2384 | * mapped file such that the file's total number of 512-byte sectors, | |
2385 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2386 | * | |
2387 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2388 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2389 | */ |
2390 | ||
f287a1a5 | 2391 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2392 | /* |
90c699a9 | 2393 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2394 | * the inode i_block field represents total file blocks in |
2395 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2396 | */ |
2397 | upper_limit = (1LL << 32) - 1; | |
2398 | ||
2399 | /* total blocks in file system block size */ | |
2400 | upper_limit >>= (bits - 9); | |
2401 | ||
2402 | } else { | |
8180a562 AK |
2403 | /* |
2404 | * We use 48 bit ext4_inode i_blocks | |
2405 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2406 | * represent total number of blocks in | |
2407 | * file system block size | |
2408 | */ | |
0fc1b451 AK |
2409 | upper_limit = (1LL << 48) - 1; |
2410 | ||
0fc1b451 AK |
2411 | } |
2412 | ||
2413 | /* indirect blocks */ | |
2414 | meta_blocks = 1; | |
2415 | /* double indirect blocks */ | |
2416 | meta_blocks += 1 + (1LL << (bits-2)); | |
2417 | /* tripple indirect blocks */ | |
2418 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2419 | ||
2420 | upper_limit -= meta_blocks; | |
2421 | upper_limit <<= bits; | |
ac27a0ec DK |
2422 | |
2423 | res += 1LL << (bits-2); | |
2424 | res += 1LL << (2*(bits-2)); | |
2425 | res += 1LL << (3*(bits-2)); | |
2426 | res <<= bits; | |
2427 | if (res > upper_limit) | |
2428 | res = upper_limit; | |
0fc1b451 AK |
2429 | |
2430 | if (res > MAX_LFS_FILESIZE) | |
2431 | res = MAX_LFS_FILESIZE; | |
2432 | ||
ac27a0ec DK |
2433 | return res; |
2434 | } | |
2435 | ||
617ba13b | 2436 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2437 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2438 | { |
617ba13b | 2439 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2440 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2441 | int has_super = 0; |
2442 | ||
2443 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2444 | ||
e2b911c5 | 2445 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2446 | return logical_sb_block + nr + 1; |
ac27a0ec | 2447 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2448 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2449 | has_super = 1; |
0b8e58a1 | 2450 | |
bd63f6b0 DW |
2451 | /* |
2452 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2453 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2454 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2455 | * compensate. | |
2456 | */ | |
2457 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2458 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2459 | has_super++; | |
2460 | ||
617ba13b | 2461 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2462 | } |
2463 | ||
c9de560d AT |
2464 | /** |
2465 | * ext4_get_stripe_size: Get the stripe size. | |
2466 | * @sbi: In memory super block info | |
2467 | * | |
2468 | * If we have specified it via mount option, then | |
2469 | * use the mount option value. If the value specified at mount time is | |
2470 | * greater than the blocks per group use the super block value. | |
2471 | * If the super block value is greater than blocks per group return 0. | |
2472 | * Allocator needs it be less than blocks per group. | |
2473 | * | |
2474 | */ | |
2475 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2476 | { | |
2477 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2478 | unsigned long stripe_width = | |
2479 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2480 | int ret; |
c9de560d AT |
2481 | |
2482 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2483 | ret = sbi->s_stripe; |
2484 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2485 | ret = stripe_width; | |
2486 | else if (stride <= sbi->s_blocks_per_group) | |
2487 | ret = stride; | |
2488 | else | |
2489 | ret = 0; | |
c9de560d | 2490 | |
3eb08658 DE |
2491 | /* |
2492 | * If the stripe width is 1, this makes no sense and | |
2493 | * we set it to 0 to turn off stripe handling code. | |
2494 | */ | |
2495 | if (ret <= 1) | |
2496 | ret = 0; | |
c9de560d | 2497 | |
3eb08658 | 2498 | return ret; |
c9de560d | 2499 | } |
ac27a0ec | 2500 | |
a13fb1a4 ES |
2501 | /* |
2502 | * Check whether this filesystem can be mounted based on | |
2503 | * the features present and the RDONLY/RDWR mount requested. | |
2504 | * Returns 1 if this filesystem can be mounted as requested, | |
2505 | * 0 if it cannot be. | |
2506 | */ | |
2507 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2508 | { | |
e2b911c5 | 2509 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2510 | ext4_msg(sb, KERN_ERR, |
2511 | "Couldn't mount because of " | |
2512 | "unsupported optional features (%x)", | |
2513 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2514 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2515 | return 0; | |
2516 | } | |
2517 | ||
2518 | if (readonly) | |
2519 | return 1; | |
2520 | ||
e2b911c5 | 2521 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b DW |
2522 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
2523 | sb->s_flags |= MS_RDONLY; | |
2524 | return 1; | |
2525 | } | |
2526 | ||
a13fb1a4 | 2527 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2528 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2529 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2530 | "unsupported optional features (%x)", | |
2531 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2532 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2533 | return 0; | |
2534 | } | |
2535 | /* | |
2536 | * Large file size enabled file system can only be mounted | |
2537 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2538 | */ | |
e2b911c5 | 2539 | if (ext4_has_feature_huge_file(sb)) { |
a13fb1a4 ES |
2540 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
2541 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2542 | "cannot be mounted RDWR without " | |
2543 | "CONFIG_LBDAF"); | |
2544 | return 0; | |
2545 | } | |
2546 | } | |
e2b911c5 | 2547 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2548 | ext4_msg(sb, KERN_ERR, |
2549 | "Can't support bigalloc feature without " | |
2550 | "extents feature\n"); | |
2551 | return 0; | |
2552 | } | |
7c319d32 AK |
2553 | |
2554 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2555 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2556 | ext4_msg(sb, KERN_ERR, |
2557 | "Filesystem with quota feature cannot be mounted RDWR " | |
2558 | "without CONFIG_QUOTA"); | |
2559 | return 0; | |
2560 | } | |
689c958c LX |
2561 | if (ext4_has_feature_project(sb) && !readonly) { |
2562 | ext4_msg(sb, KERN_ERR, | |
2563 | "Filesystem with project quota feature cannot be mounted RDWR " | |
2564 | "without CONFIG_QUOTA"); | |
2565 | return 0; | |
2566 | } | |
7c319d32 | 2567 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
2568 | return 1; |
2569 | } | |
2570 | ||
66e61a9e TT |
2571 | /* |
2572 | * This function is called once a day if we have errors logged | |
2573 | * on the file system | |
2574 | */ | |
2575 | static void print_daily_error_info(unsigned long arg) | |
2576 | { | |
2577 | struct super_block *sb = (struct super_block *) arg; | |
2578 | struct ext4_sb_info *sbi; | |
2579 | struct ext4_super_block *es; | |
2580 | ||
2581 | sbi = EXT4_SB(sb); | |
2582 | es = sbi->s_es; | |
2583 | ||
2584 | if (es->s_error_count) | |
ae0f78de TT |
2585 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2586 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2587 | le32_to_cpu(es->s_error_count)); |
2588 | if (es->s_first_error_time) { | |
ae0f78de | 2589 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2590 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2591 | (int) sizeof(es->s_first_error_func), | |
2592 | es->s_first_error_func, | |
2593 | le32_to_cpu(es->s_first_error_line)); | |
2594 | if (es->s_first_error_ino) | |
2595 | printk(": inode %u", | |
2596 | le32_to_cpu(es->s_first_error_ino)); | |
2597 | if (es->s_first_error_block) | |
2598 | printk(": block %llu", (unsigned long long) | |
2599 | le64_to_cpu(es->s_first_error_block)); | |
2600 | printk("\n"); | |
2601 | } | |
2602 | if (es->s_last_error_time) { | |
ae0f78de | 2603 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2604 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2605 | (int) sizeof(es->s_last_error_func), | |
2606 | es->s_last_error_func, | |
2607 | le32_to_cpu(es->s_last_error_line)); | |
2608 | if (es->s_last_error_ino) | |
2609 | printk(": inode %u", | |
2610 | le32_to_cpu(es->s_last_error_ino)); | |
2611 | if (es->s_last_error_block) | |
2612 | printk(": block %llu", (unsigned long long) | |
2613 | le64_to_cpu(es->s_last_error_block)); | |
2614 | printk("\n"); | |
2615 | } | |
2616 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2617 | } | |
2618 | ||
bfff6873 LC |
2619 | /* Find next suitable group and run ext4_init_inode_table */ |
2620 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2621 | { | |
2622 | struct ext4_group_desc *gdp = NULL; | |
2623 | ext4_group_t group, ngroups; | |
2624 | struct super_block *sb; | |
2625 | unsigned long timeout = 0; | |
2626 | int ret = 0; | |
2627 | ||
2628 | sb = elr->lr_super; | |
2629 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2630 | ||
8e8ad8a5 | 2631 | sb_start_write(sb); |
bfff6873 LC |
2632 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2633 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2634 | if (!gdp) { | |
2635 | ret = 1; | |
2636 | break; | |
2637 | } | |
2638 | ||
2639 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2640 | break; | |
2641 | } | |
2642 | ||
7f511862 | 2643 | if (group >= ngroups) |
bfff6873 LC |
2644 | ret = 1; |
2645 | ||
2646 | if (!ret) { | |
2647 | timeout = jiffies; | |
2648 | ret = ext4_init_inode_table(sb, group, | |
2649 | elr->lr_timeout ? 0 : 1); | |
2650 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2651 | timeout = (jiffies - timeout) * |
2652 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2653 | elr->lr_timeout = timeout; |
2654 | } | |
2655 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2656 | elr->lr_next_group = group + 1; | |
2657 | } | |
8e8ad8a5 | 2658 | sb_end_write(sb); |
bfff6873 LC |
2659 | |
2660 | return ret; | |
2661 | } | |
2662 | ||
2663 | /* | |
2664 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2665 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2666 | */ |
2667 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2668 | { | |
2669 | struct ext4_sb_info *sbi; | |
2670 | ||
2671 | if (!elr) | |
2672 | return; | |
2673 | ||
2674 | sbi = elr->lr_sbi; | |
2675 | ||
2676 | list_del(&elr->lr_request); | |
2677 | sbi->s_li_request = NULL; | |
2678 | kfree(elr); | |
2679 | } | |
2680 | ||
2681 | static void ext4_unregister_li_request(struct super_block *sb) | |
2682 | { | |
1bb933fb LC |
2683 | mutex_lock(&ext4_li_mtx); |
2684 | if (!ext4_li_info) { | |
2685 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2686 | return; |
1bb933fb | 2687 | } |
bfff6873 LC |
2688 | |
2689 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2690 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2691 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2692 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2693 | } |
2694 | ||
8f1f7453 ES |
2695 | static struct task_struct *ext4_lazyinit_task; |
2696 | ||
bfff6873 LC |
2697 | /* |
2698 | * This is the function where ext4lazyinit thread lives. It walks | |
2699 | * through the request list searching for next scheduled filesystem. | |
2700 | * When such a fs is found, run the lazy initialization request | |
2701 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2702 | * function. Based on that time we compute next schedule time of | |
2703 | * the request. When walking through the list is complete, compute | |
2704 | * next waking time and put itself into sleep. | |
2705 | */ | |
2706 | static int ext4_lazyinit_thread(void *arg) | |
2707 | { | |
2708 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2709 | struct list_head *pos, *n; | |
2710 | struct ext4_li_request *elr; | |
4ed5c033 | 2711 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2712 | |
2713 | BUG_ON(NULL == eli); | |
2714 | ||
bfff6873 LC |
2715 | cont_thread: |
2716 | while (true) { | |
2717 | next_wakeup = MAX_JIFFY_OFFSET; | |
2718 | ||
2719 | mutex_lock(&eli->li_list_mtx); | |
2720 | if (list_empty(&eli->li_request_list)) { | |
2721 | mutex_unlock(&eli->li_list_mtx); | |
2722 | goto exit_thread; | |
2723 | } | |
2724 | ||
2725 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2726 | elr = list_entry(pos, struct ext4_li_request, | |
2727 | lr_request); | |
2728 | ||
b2c78cd0 TT |
2729 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2730 | if (ext4_run_li_request(elr) != 0) { | |
2731 | /* error, remove the lazy_init job */ | |
2732 | ext4_remove_li_request(elr); | |
2733 | continue; | |
2734 | } | |
bfff6873 LC |
2735 | } |
2736 | ||
2737 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2738 | next_wakeup = elr->lr_next_sched; | |
2739 | } | |
2740 | mutex_unlock(&eli->li_list_mtx); | |
2741 | ||
a0acae0e | 2742 | try_to_freeze(); |
bfff6873 | 2743 | |
4ed5c033 LC |
2744 | cur = jiffies; |
2745 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2746 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2747 | cond_resched(); |
2748 | continue; | |
2749 | } | |
2750 | ||
4ed5c033 LC |
2751 | schedule_timeout_interruptible(next_wakeup - cur); |
2752 | ||
8f1f7453 ES |
2753 | if (kthread_should_stop()) { |
2754 | ext4_clear_request_list(); | |
2755 | goto exit_thread; | |
2756 | } | |
bfff6873 LC |
2757 | } |
2758 | ||
2759 | exit_thread: | |
2760 | /* | |
2761 | * It looks like the request list is empty, but we need | |
2762 | * to check it under the li_list_mtx lock, to prevent any | |
2763 | * additions into it, and of course we should lock ext4_li_mtx | |
2764 | * to atomically free the list and ext4_li_info, because at | |
2765 | * this point another ext4 filesystem could be registering | |
2766 | * new one. | |
2767 | */ | |
2768 | mutex_lock(&ext4_li_mtx); | |
2769 | mutex_lock(&eli->li_list_mtx); | |
2770 | if (!list_empty(&eli->li_request_list)) { | |
2771 | mutex_unlock(&eli->li_list_mtx); | |
2772 | mutex_unlock(&ext4_li_mtx); | |
2773 | goto cont_thread; | |
2774 | } | |
2775 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2776 | kfree(ext4_li_info); |
2777 | ext4_li_info = NULL; | |
2778 | mutex_unlock(&ext4_li_mtx); | |
2779 | ||
2780 | return 0; | |
2781 | } | |
2782 | ||
2783 | static void ext4_clear_request_list(void) | |
2784 | { | |
2785 | struct list_head *pos, *n; | |
2786 | struct ext4_li_request *elr; | |
2787 | ||
2788 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2789 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2790 | elr = list_entry(pos, struct ext4_li_request, | |
2791 | lr_request); | |
2792 | ext4_remove_li_request(elr); | |
2793 | } | |
2794 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2795 | } | |
2796 | ||
2797 | static int ext4_run_lazyinit_thread(void) | |
2798 | { | |
8f1f7453 ES |
2799 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2800 | ext4_li_info, "ext4lazyinit"); | |
2801 | if (IS_ERR(ext4_lazyinit_task)) { | |
2802 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2803 | ext4_clear_request_list(); |
bfff6873 LC |
2804 | kfree(ext4_li_info); |
2805 | ext4_li_info = NULL; | |
92b97816 | 2806 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2807 | "initialization thread\n", |
2808 | err); | |
2809 | return err; | |
2810 | } | |
2811 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2812 | return 0; |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * Check whether it make sense to run itable init. thread or not. | |
2817 | * If there is at least one uninitialized inode table, return | |
2818 | * corresponding group number, else the loop goes through all | |
2819 | * groups and return total number of groups. | |
2820 | */ | |
2821 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2822 | { | |
2823 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2824 | struct ext4_group_desc *gdp = NULL; | |
2825 | ||
2826 | for (group = 0; group < ngroups; group++) { | |
2827 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2828 | if (!gdp) | |
2829 | continue; | |
2830 | ||
2831 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2832 | break; | |
2833 | } | |
2834 | ||
2835 | return group; | |
2836 | } | |
2837 | ||
2838 | static int ext4_li_info_new(void) | |
2839 | { | |
2840 | struct ext4_lazy_init *eli = NULL; | |
2841 | ||
2842 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2843 | if (!eli) | |
2844 | return -ENOMEM; | |
2845 | ||
bfff6873 LC |
2846 | INIT_LIST_HEAD(&eli->li_request_list); |
2847 | mutex_init(&eli->li_list_mtx); | |
2848 | ||
bfff6873 LC |
2849 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2850 | ||
2851 | ext4_li_info = eli; | |
2852 | ||
2853 | return 0; | |
2854 | } | |
2855 | ||
2856 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2857 | ext4_group_t start) | |
2858 | { | |
2859 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2860 | struct ext4_li_request *elr; | |
bfff6873 LC |
2861 | |
2862 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2863 | if (!elr) | |
2864 | return NULL; | |
2865 | ||
2866 | elr->lr_super = sb; | |
2867 | elr->lr_sbi = sbi; | |
2868 | elr->lr_next_group = start; | |
2869 | ||
2870 | /* | |
2871 | * Randomize first schedule time of the request to | |
2872 | * spread the inode table initialization requests | |
2873 | * better. | |
2874 | */ | |
dd1f723b TT |
2875 | elr->lr_next_sched = jiffies + (prandom_u32() % |
2876 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
2877 | return elr; |
2878 | } | |
2879 | ||
7f511862 TT |
2880 | int ext4_register_li_request(struct super_block *sb, |
2881 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
2882 | { |
2883 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 2884 | struct ext4_li_request *elr = NULL; |
bfff6873 | 2885 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 2886 | int ret = 0; |
bfff6873 | 2887 | |
7f511862 | 2888 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
2889 | if (sbi->s_li_request != NULL) { |
2890 | /* | |
2891 | * Reset timeout so it can be computed again, because | |
2892 | * s_li_wait_mult might have changed. | |
2893 | */ | |
2894 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 2895 | goto out; |
51ce6511 | 2896 | } |
bfff6873 LC |
2897 | |
2898 | if (first_not_zeroed == ngroups || | |
2899 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 2900 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 2901 | goto out; |
bfff6873 LC |
2902 | |
2903 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
2904 | if (!elr) { |
2905 | ret = -ENOMEM; | |
2906 | goto out; | |
2907 | } | |
bfff6873 LC |
2908 | |
2909 | if (NULL == ext4_li_info) { | |
2910 | ret = ext4_li_info_new(); | |
2911 | if (ret) | |
2912 | goto out; | |
2913 | } | |
2914 | ||
2915 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2916 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2917 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2918 | ||
2919 | sbi->s_li_request = elr; | |
46e4690b TM |
2920 | /* |
2921 | * set elr to NULL here since it has been inserted to | |
2922 | * the request_list and the removal and free of it is | |
2923 | * handled by ext4_clear_request_list from now on. | |
2924 | */ | |
2925 | elr = NULL; | |
bfff6873 LC |
2926 | |
2927 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2928 | ret = ext4_run_lazyinit_thread(); | |
2929 | if (ret) | |
2930 | goto out; | |
2931 | } | |
bfff6873 | 2932 | out: |
beed5ecb NK |
2933 | mutex_unlock(&ext4_li_mtx); |
2934 | if (ret) | |
bfff6873 | 2935 | kfree(elr); |
bfff6873 LC |
2936 | return ret; |
2937 | } | |
2938 | ||
2939 | /* | |
2940 | * We do not need to lock anything since this is called on | |
2941 | * module unload. | |
2942 | */ | |
2943 | static void ext4_destroy_lazyinit_thread(void) | |
2944 | { | |
2945 | /* | |
2946 | * If thread exited earlier | |
2947 | * there's nothing to be done. | |
2948 | */ | |
8f1f7453 | 2949 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
2950 | return; |
2951 | ||
8f1f7453 | 2952 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
2953 | } |
2954 | ||
25ed6e8a DW |
2955 | static int set_journal_csum_feature_set(struct super_block *sb) |
2956 | { | |
2957 | int ret = 1; | |
2958 | int compat, incompat; | |
2959 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2960 | ||
9aa5d32b | 2961 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 2962 | /* journal checksum v3 */ |
25ed6e8a | 2963 | compat = 0; |
db9ee220 | 2964 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
2965 | } else { |
2966 | /* journal checksum v1 */ | |
2967 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
2968 | incompat = 0; | |
2969 | } | |
2970 | ||
feb8c6d3 DW |
2971 | jbd2_journal_clear_features(sbi->s_journal, |
2972 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2973 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
2974 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
2975 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2976 | ret = jbd2_journal_set_features(sbi->s_journal, | |
2977 | compat, 0, | |
2978 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
2979 | incompat); | |
2980 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2981 | ret = jbd2_journal_set_features(sbi->s_journal, | |
2982 | compat, 0, | |
2983 | incompat); | |
2984 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2985 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2986 | } else { | |
feb8c6d3 DW |
2987 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
2988 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
2989 | } |
2990 | ||
2991 | return ret; | |
2992 | } | |
2993 | ||
952fc18e TT |
2994 | /* |
2995 | * Note: calculating the overhead so we can be compatible with | |
2996 | * historical BSD practice is quite difficult in the face of | |
2997 | * clusters/bigalloc. This is because multiple metadata blocks from | |
2998 | * different block group can end up in the same allocation cluster. | |
2999 | * Calculating the exact overhead in the face of clustered allocation | |
3000 | * requires either O(all block bitmaps) in memory or O(number of block | |
3001 | * groups**2) in time. We will still calculate the superblock for | |
3002 | * older file systems --- and if we come across with a bigalloc file | |
3003 | * system with zero in s_overhead_clusters the estimate will be close to | |
3004 | * correct especially for very large cluster sizes --- but for newer | |
3005 | * file systems, it's better to calculate this figure once at mkfs | |
3006 | * time, and store it in the superblock. If the superblock value is | |
3007 | * present (even for non-bigalloc file systems), we will use it. | |
3008 | */ | |
3009 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3010 | char *buf) | |
3011 | { | |
3012 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3013 | struct ext4_group_desc *gdp; | |
3014 | ext4_fsblk_t first_block, last_block, b; | |
3015 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3016 | int s, j, count = 0; | |
3017 | ||
e2b911c5 | 3018 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3019 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3020 | sbi->s_itb_per_group + 2); | |
3021 | ||
952fc18e TT |
3022 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3023 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3024 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3025 | for (i = 0; i < ngroups; i++) { | |
3026 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3027 | b = ext4_block_bitmap(sb, gdp); | |
3028 | if (b >= first_block && b <= last_block) { | |
3029 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3030 | count++; | |
3031 | } | |
3032 | b = ext4_inode_bitmap(sb, gdp); | |
3033 | if (b >= first_block && b <= last_block) { | |
3034 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3035 | count++; | |
3036 | } | |
3037 | b = ext4_inode_table(sb, gdp); | |
3038 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3039 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3040 | int c = EXT4_B2C(sbi, b - first_block); | |
3041 | ext4_set_bit(c, buf); | |
3042 | count++; | |
3043 | } | |
3044 | if (i != grp) | |
3045 | continue; | |
3046 | s = 0; | |
3047 | if (ext4_bg_has_super(sb, grp)) { | |
3048 | ext4_set_bit(s++, buf); | |
3049 | count++; | |
3050 | } | |
3051 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3052 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3053 | count++; | |
3054 | } | |
3055 | } | |
3056 | if (!count) | |
3057 | return 0; | |
3058 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3059 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3060 | } | |
3061 | ||
3062 | /* | |
3063 | * Compute the overhead and stash it in sbi->s_overhead | |
3064 | */ | |
3065 | int ext4_calculate_overhead(struct super_block *sb) | |
3066 | { | |
3067 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3068 | struct ext4_super_block *es = sbi->s_es; | |
3069 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3070 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3071 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3072 | |
952fc18e TT |
3073 | if (!buf) |
3074 | return -ENOMEM; | |
3075 | ||
3076 | /* | |
3077 | * Compute the overhead (FS structures). This is constant | |
3078 | * for a given filesystem unless the number of block groups | |
3079 | * changes so we cache the previous value until it does. | |
3080 | */ | |
3081 | ||
3082 | /* | |
3083 | * All of the blocks before first_data_block are overhead | |
3084 | */ | |
3085 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3086 | ||
3087 | /* | |
3088 | * Add the overhead found in each block group | |
3089 | */ | |
3090 | for (i = 0; i < ngroups; i++) { | |
3091 | int blks; | |
3092 | ||
3093 | blks = count_overhead(sb, i, buf); | |
3094 | overhead += blks; | |
3095 | if (blks) | |
3096 | memset(buf, 0, PAGE_SIZE); | |
3097 | cond_resched(); | |
3098 | } | |
b003b524 ES |
3099 | /* Add the internal journal blocks as well */ |
3100 | if (sbi->s_journal && !sbi->journal_bdev) | |
810da240 | 3101 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3102 | |
952fc18e TT |
3103 | sbi->s_overhead = overhead; |
3104 | smp_wmb(); | |
3105 | free_page((unsigned long) buf); | |
3106 | return 0; | |
3107 | } | |
3108 | ||
b5799018 | 3109 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3110 | { |
3111 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3112 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3113 | |
30fac0f7 JK |
3114 | /* |
3115 | * There's no need to reserve anything when we aren't using extents. | |
3116 | * The space estimates are exact, there are no unwritten extents, | |
3117 | * hole punching doesn't need new metadata... This is needed especially | |
3118 | * to keep ext2/3 backward compatibility. | |
3119 | */ | |
e2b911c5 | 3120 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3121 | return; |
27dd4385 LC |
3122 | /* |
3123 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3124 | * This should cover the situations where we can not afford to run | |
3125 | * out of space like for example punch hole, or converting | |
556615dc | 3126 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3127 | * allocation would require 1, or 2 blocks, higher numbers are |
3128 | * very rare. | |
3129 | */ | |
b5799018 TT |
3130 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3131 | sbi->s_cluster_bits); | |
27dd4385 LC |
3132 | |
3133 | do_div(resv_clusters, 50); | |
3134 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3135 | ||
b5799018 | 3136 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3137 | } |
3138 | ||
2b2d6d01 | 3139 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3140 | { |
d4c402d9 | 3141 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3142 | struct buffer_head *bh; |
617ba13b MC |
3143 | struct ext4_super_block *es = NULL; |
3144 | struct ext4_sb_info *sbi; | |
3145 | ext4_fsblk_t block; | |
3146 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3147 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3148 | unsigned long offset = 0; |
ac27a0ec DK |
3149 | unsigned long journal_devnum = 0; |
3150 | unsigned long def_mount_opts; | |
3151 | struct inode *root; | |
0390131b | 3152 | const char *descr; |
dcc7dae3 | 3153 | int ret = -ENOMEM; |
281b5995 | 3154 | int blocksize, clustersize; |
4ec11028 TT |
3155 | unsigned int db_count; |
3156 | unsigned int i; | |
281b5995 | 3157 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3158 | __u64 blocks_count; |
07aa2ea1 | 3159 | int err = 0; |
b3881f74 | 3160 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3161 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3162 | |
3163 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3164 | if (!sbi) | |
dcc7dae3 | 3165 | goto out_free_orig; |
705895b6 PE |
3166 | |
3167 | sbi->s_blockgroup_lock = | |
3168 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3169 | if (!sbi->s_blockgroup_lock) { | |
3170 | kfree(sbi); | |
dcc7dae3 | 3171 | goto out_free_orig; |
705895b6 | 3172 | } |
ac27a0ec | 3173 | sb->s_fs_info = sbi; |
2c0544b2 | 3174 | sbi->s_sb = sb; |
240799cd | 3175 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3176 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3177 | if (sb->s_bdev->bd_part) |
3178 | sbi->s_sectors_written_start = | |
3179 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3180 | |
9f6200bb | 3181 | /* Cleanup superblock name */ |
ec3904dc | 3182 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3183 | |
07aa2ea1 | 3184 | /* -EINVAL is default */ |
dcc7dae3 | 3185 | ret = -EINVAL; |
617ba13b | 3186 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3187 | if (!blocksize) { |
b31e1552 | 3188 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3189 | goto out_fail; |
3190 | } | |
3191 | ||
3192 | /* | |
617ba13b | 3193 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3194 | * block sizes. We need to calculate the offset from buffer start. |
3195 | */ | |
617ba13b | 3196 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3197 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3198 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3199 | } else { |
70bbb3e0 | 3200 | logical_sb_block = sb_block; |
ac27a0ec DK |
3201 | } |
3202 | ||
a8ac900b | 3203 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3204 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3205 | goto out_fail; |
3206 | } | |
3207 | /* | |
3208 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3209 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3210 | */ |
2716b802 | 3211 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3212 | sbi->s_es = es; |
3213 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3214 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3215 | goto cantfind_ext4; | |
afc32f7e | 3216 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3217 | |
feb0ab32 | 3218 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3219 | if (ext4_has_feature_metadata_csum(sb) && |
3220 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3221 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3222 | "redundant flags; please run fsck."); |
3223 | ||
d25425f8 DW |
3224 | /* Check for a known checksum algorithm */ |
3225 | if (!ext4_verify_csum_type(sb, es)) { | |
3226 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3227 | "unknown checksum algorithm."); | |
3228 | silent = 1; | |
3229 | goto cantfind_ext4; | |
3230 | } | |
3231 | ||
0441984a | 3232 | /* Load the checksum driver */ |
e2b911c5 | 3233 | if (ext4_has_feature_metadata_csum(sb)) { |
0441984a DW |
3234 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3235 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3236 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3237 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3238 | sbi->s_chksum_driver = NULL; | |
3239 | goto failed_mount; | |
3240 | } | |
3241 | } | |
3242 | ||
a9c47317 DW |
3243 | /* Check superblock checksum */ |
3244 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3245 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3246 | "invalid superblock checksum. Run e2fsck?"); | |
3247 | silent = 1; | |
6a797d27 | 3248 | ret = -EFSBADCRC; |
a9c47317 DW |
3249 | goto cantfind_ext4; |
3250 | } | |
3251 | ||
3252 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3253 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f DW |
3254 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
3255 | else if (ext4_has_metadata_csum(sb)) | |
a9c47317 DW |
3256 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3257 | sizeof(es->s_uuid)); | |
3258 | ||
ac27a0ec DK |
3259 | /* Set defaults before we parse the mount options */ |
3260 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3261 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3262 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3263 | set_opt(sb, DEBUG); |
87f26807 | 3264 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3265 | set_opt(sb, GRPID); |
617ba13b | 3266 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3267 | set_opt(sb, NO_UID32); |
ea663336 | 3268 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3269 | set_opt(sb, XATTR_USER); |
03010a33 | 3270 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3271 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3272 | #endif |
98c1a759 DW |
3273 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3274 | if (ext4_has_metadata_csum(sb)) | |
3275 | set_opt(sb, JOURNAL_CHECKSUM); | |
3276 | ||
617ba13b | 3277 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3278 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3279 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3280 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3281 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3282 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3283 | |
3284 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3285 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3286 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3287 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3288 | else |
fd8c37ec | 3289 | set_opt(sb, ERRORS_RO); |
45f1a9c3 DW |
3290 | /* block_validity enabled by default; disable with noblock_validity */ |
3291 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3292 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3293 | set_opt(sb, DISCARD); |
ac27a0ec | 3294 | |
08cefc7a EB |
3295 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3296 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3297 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3298 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3299 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3300 | |
8b67f04a | 3301 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3302 | set_opt(sb, BARRIER); |
ac27a0ec | 3303 | |
dd919b98 AK |
3304 | /* |
3305 | * enable delayed allocation by default | |
3306 | * Use -o nodelalloc to turn it off | |
3307 | */ | |
bc0b75f7 | 3308 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3309 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3310 | set_opt(sb, DELALLOC); |
dd919b98 | 3311 | |
51ce6511 LC |
3312 | /* |
3313 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3314 | * no mount option specified. | |
3315 | */ | |
3316 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3317 | ||
8b67f04a | 3318 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3319 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3320 | ext4_msg(sb, KERN_WARNING, |
3321 | "failed to parse options in superblock: %s", | |
3322 | sbi->s_es->s_mount_opts); | |
3323 | } | |
5a916be1 | 3324 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3325 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3326 | &journal_ioprio, 0)) |
ac27a0ec DK |
3327 | goto failed_mount; |
3328 | ||
56889787 TT |
3329 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3330 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3331 | "with data=journal disables delayed " | |
3332 | "allocation and O_DIRECT support!\n"); | |
3333 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3334 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3335 | "both data=journal and delalloc"); | |
3336 | goto failed_mount; | |
3337 | } | |
3338 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3339 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3340 | "both data=journal and dioread_nolock"); |
56889787 TT |
3341 | goto failed_mount; |
3342 | } | |
923ae0ff RZ |
3343 | if (test_opt(sb, DAX)) { |
3344 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3345 | "both data=journal and dax"); | |
3346 | goto failed_mount; | |
3347 | } | |
56889787 TT |
3348 | if (test_opt(sb, DELALLOC)) |
3349 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3350 | } else { |
3351 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3352 | } |
3353 | ||
ac27a0ec | 3354 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3355 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3356 | |
617ba13b | 3357 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3358 | (ext4_has_compat_features(sb) || |
3359 | ext4_has_ro_compat_features(sb) || | |
3360 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3361 | ext4_msg(sb, KERN_WARNING, |
3362 | "feature flags set on rev 0 fs, " | |
3363 | "running e2fsck is recommended"); | |
469108ff | 3364 | |
ed3654eb TT |
3365 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3366 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3367 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3368 | ext4_msg(sb, KERN_ERR, |
3369 | "The Hurd can't support 64-bit file systems"); | |
3370 | goto failed_mount; | |
3371 | } | |
3372 | } | |
3373 | ||
2035e776 TT |
3374 | if (IS_EXT2_SB(sb)) { |
3375 | if (ext2_feature_set_ok(sb)) | |
3376 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3377 | "using the ext4 subsystem"); | |
3378 | else { | |
3379 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3380 | "to feature incompatibilities"); | |
3381 | goto failed_mount; | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | if (IS_EXT3_SB(sb)) { | |
3386 | if (ext3_feature_set_ok(sb)) | |
3387 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3388 | "using the ext4 subsystem"); | |
3389 | else { | |
3390 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3391 | "to feature incompatibilities"); | |
3392 | goto failed_mount; | |
3393 | } | |
3394 | } | |
3395 | ||
ac27a0ec DK |
3396 | /* |
3397 | * Check feature flags regardless of the revision level, since we | |
3398 | * previously didn't change the revision level when setting the flags, | |
3399 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3400 | */ | |
a13fb1a4 | 3401 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3402 | goto failed_mount; |
a13fb1a4 | 3403 | |
261cb20c | 3404 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3405 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3406 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3407 | ext4_msg(sb, KERN_ERR, |
3408 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3409 | goto failed_mount; |
3410 | } | |
3411 | ||
923ae0ff RZ |
3412 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
3413 | if (blocksize != PAGE_SIZE) { | |
3414 | ext4_msg(sb, KERN_ERR, | |
3415 | "error: unsupported blocksize for dax"); | |
3416 | goto failed_mount; | |
3417 | } | |
3418 | if (!sb->s_bdev->bd_disk->fops->direct_access) { | |
3419 | ext4_msg(sb, KERN_ERR, | |
3420 | "error: device does not support dax"); | |
3421 | goto failed_mount; | |
3422 | } | |
3423 | } | |
3424 | ||
e2b911c5 | 3425 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
3426 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
3427 | es->s_encryption_level); | |
3428 | goto failed_mount; | |
3429 | } | |
3430 | ||
ac27a0ec | 3431 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3432 | /* Validate the filesystem blocksize */ |
3433 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3434 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3435 | blocksize); |
ac27a0ec DK |
3436 | goto failed_mount; |
3437 | } | |
3438 | ||
2b2d6d01 | 3439 | brelse(bh); |
70bbb3e0 AM |
3440 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3441 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3442 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3443 | if (!bh) { |
b31e1552 ES |
3444 | ext4_msg(sb, KERN_ERR, |
3445 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3446 | goto failed_mount; |
3447 | } | |
2716b802 | 3448 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3449 | sbi->s_es = es; |
617ba13b | 3450 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3451 | ext4_msg(sb, KERN_ERR, |
3452 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3453 | goto failed_mount; |
3454 | } | |
3455 | } | |
3456 | ||
e2b911c5 | 3457 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
3458 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3459 | has_huge_files); | |
3460 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3461 | |
617ba13b MC |
3462 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3463 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3464 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3465 | } else { |
3466 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3467 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3468 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3469 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3470 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3471 | ext4_msg(sb, KERN_ERR, |
3472 | "unsupported inode size: %d", | |
2b2d6d01 | 3473 | sbi->s_inode_size); |
ac27a0ec DK |
3474 | goto failed_mount; |
3475 | } | |
ef7f3835 KS |
3476 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3477 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3478 | } |
0b8e58a1 | 3479 | |
0d1ee42f | 3480 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 3481 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 3482 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3483 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3484 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3485 | ext4_msg(sb, KERN_ERR, |
3486 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3487 | sbi->s_desc_size); |
3488 | goto failed_mount; | |
3489 | } | |
3490 | } else | |
3491 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3492 | |
ac27a0ec | 3493 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3494 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3495 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3496 | goto cantfind_ext4; |
0b8e58a1 | 3497 | |
617ba13b | 3498 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3499 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3500 | goto cantfind_ext4; |
ac27a0ec DK |
3501 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3502 | sbi->s_inodes_per_block; | |
0d1ee42f | 3503 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3504 | sbi->s_sbh = bh; |
3505 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3506 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3507 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3508 | |
2b2d6d01 | 3509 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3510 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3511 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 3512 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
3513 | i = le32_to_cpu(es->s_flags); |
3514 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3515 | sbi->s_hash_unsigned = 3; | |
3516 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3517 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3518 | if (!(sb->s_flags & MS_RDONLY)) |
3519 | es->s_flags |= | |
3520 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3521 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3522 | #else |
23301410 TT |
3523 | if (!(sb->s_flags & MS_RDONLY)) |
3524 | es->s_flags |= | |
3525 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3526 | #endif |
23301410 | 3527 | } |
f99b2589 | 3528 | } |
ac27a0ec | 3529 | |
281b5995 TT |
3530 | /* Handle clustersize */ |
3531 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 3532 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
3533 | if (has_bigalloc) { |
3534 | if (clustersize < blocksize) { | |
3535 | ext4_msg(sb, KERN_ERR, | |
3536 | "cluster size (%d) smaller than " | |
3537 | "block size (%d)", clustersize, blocksize); | |
3538 | goto failed_mount; | |
3539 | } | |
3540 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3541 | le32_to_cpu(es->s_log_block_size); | |
3542 | sbi->s_clusters_per_group = | |
3543 | le32_to_cpu(es->s_clusters_per_group); | |
3544 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3545 | ext4_msg(sb, KERN_ERR, | |
3546 | "#clusters per group too big: %lu", | |
3547 | sbi->s_clusters_per_group); | |
3548 | goto failed_mount; | |
3549 | } | |
3550 | if (sbi->s_blocks_per_group != | |
3551 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3552 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3553 | "clusters per group (%lu) inconsistent", | |
3554 | sbi->s_blocks_per_group, | |
3555 | sbi->s_clusters_per_group); | |
3556 | goto failed_mount; | |
3557 | } | |
3558 | } else { | |
3559 | if (clustersize != blocksize) { | |
3560 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3561 | "block size (%d)", clustersize, | |
3562 | blocksize); | |
3563 | clustersize = blocksize; | |
3564 | } | |
3565 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3566 | ext4_msg(sb, KERN_ERR, | |
3567 | "#blocks per group too big: %lu", | |
3568 | sbi->s_blocks_per_group); | |
3569 | goto failed_mount; | |
3570 | } | |
3571 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3572 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3573 | } |
281b5995 TT |
3574 | sbi->s_cluster_ratio = clustersize / blocksize; |
3575 | ||
ac27a0ec | 3576 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3577 | ext4_msg(sb, KERN_ERR, |
3578 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3579 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3580 | goto failed_mount; |
3581 | } | |
3582 | ||
960fd856 TT |
3583 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3584 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3585 | set_opt2(sb, STD_GROUP_SIZE); | |
3586 | ||
bf43d84b ES |
3587 | /* |
3588 | * Test whether we have more sectors than will fit in sector_t, | |
3589 | * and whether the max offset is addressable by the page cache. | |
3590 | */ | |
5a9ae68a | 3591 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3592 | ext4_blocks_count(es)); |
5a9ae68a | 3593 | if (err) { |
b31e1552 | 3594 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3595 | " too large to mount safely on this system"); |
ac27a0ec | 3596 | if (sizeof(sector_t) < 8) |
90c699a9 | 3597 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3598 | goto failed_mount; |
3599 | } | |
3600 | ||
617ba13b MC |
3601 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3602 | goto cantfind_ext4; | |
e7c95593 | 3603 | |
0f2ddca6 FTN |
3604 | /* check blocks count against device size */ |
3605 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3606 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3607 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3608 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3609 | ext4_blocks_count(es), blocks_count); |
3610 | goto failed_mount; | |
3611 | } | |
3612 | ||
0b8e58a1 AD |
3613 | /* |
3614 | * It makes no sense for the first data block to be beyond the end | |
3615 | * of the filesystem. | |
3616 | */ | |
3617 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3618 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3619 | "block %u is beyond end of filesystem (%llu)", |
3620 | le32_to_cpu(es->s_first_data_block), | |
3621 | ext4_blocks_count(es)); | |
e7c95593 ES |
3622 | goto failed_mount; |
3623 | } | |
bd81d8ee LV |
3624 | blocks_count = (ext4_blocks_count(es) - |
3625 | le32_to_cpu(es->s_first_data_block) + | |
3626 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3627 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3628 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3629 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3630 | "(block count %llu, first data block %u, " |
b31e1552 | 3631 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3632 | ext4_blocks_count(es), |
3633 | le32_to_cpu(es->s_first_data_block), | |
3634 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3635 | goto failed_mount; | |
3636 | } | |
bd81d8ee | 3637 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3638 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3639 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3640 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3641 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3642 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3643 | sizeof(struct buffer_head *), | |
3644 | GFP_KERNEL); | |
ac27a0ec | 3645 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3646 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3647 | ret = -ENOMEM; |
ac27a0ec DK |
3648 | goto failed_mount; |
3649 | } | |
3650 | ||
705895b6 | 3651 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3652 | |
3653 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3654 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 3655 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 3656 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
3657 | ext4_msg(sb, KERN_ERR, |
3658 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3659 | db_count = i; |
3660 | goto failed_mount2; | |
3661 | } | |
3662 | } | |
bfff6873 | 3663 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3664 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 3665 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 3666 | goto failed_mount2; |
ac27a0ec | 3667 | } |
772cb7c8 | 3668 | |
f9ae9cf5 | 3669 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
3670 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
3671 | spin_lock_init(&sbi->s_next_gen_lock); | |
3672 | ||
04ecddb7 JM |
3673 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
3674 | (unsigned long) sb); | |
04496411 | 3675 | |
a75ae78f | 3676 | /* Register extent status tree shrinker */ |
eb68d0e2 | 3677 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 3678 | goto failed_mount3; |
ce7e010a | 3679 | |
c9de560d | 3680 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3681 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3682 | |
f9ae9cf5 TT |
3683 | /* |
3684 | * set up enough so that it can read an inode | |
3685 | */ | |
f6e63f90 | 3686 | sb->s_op = &ext4_sops; |
617ba13b MC |
3687 | sb->s_export_op = &ext4_export_ops; |
3688 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3689 | #ifdef CONFIG_QUOTA |
617ba13b | 3690 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 3691 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 3692 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
3693 | else |
3694 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 3695 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 3696 | #endif |
f2fa2ffc AK |
3697 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3698 | ||
ac27a0ec | 3699 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3700 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3701 | |
3702 | sb->s_root = NULL; | |
3703 | ||
3704 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 3705 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 3706 | |
e2b911c5 | 3707 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
c5e06d10 | 3708 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 3709 | goto failed_mount3a; |
c5e06d10 | 3710 | |
ac27a0ec DK |
3711 | /* |
3712 | * The first inode we look at is the journal inode. Don't try | |
3713 | * root first: it may be modified in the journal! | |
3714 | */ | |
e2b911c5 | 3715 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
617ba13b | 3716 | if (ext4_load_journal(sb, es, journal_devnum)) |
50460fe8 | 3717 | goto failed_mount3a; |
0390131b | 3718 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
e2b911c5 | 3719 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
3720 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3721 | "suppressed and not mounted read-only"); | |
744692dc | 3722 | goto failed_mount_wq; |
ac27a0ec | 3723 | } else { |
1e381f60 DM |
3724 | /* Nojournal mode, all journal mount options are illegal */ |
3725 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
3726 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3727 | "journal_checksum, fs mounted w/o journal"); | |
3728 | goto failed_mount_wq; | |
3729 | } | |
3730 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3731 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3732 | "journal_async_commit, fs mounted w/o journal"); | |
3733 | goto failed_mount_wq; | |
3734 | } | |
3735 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
3736 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3737 | "commit=%lu, fs mounted w/o journal", | |
3738 | sbi->s_commit_interval / HZ); | |
3739 | goto failed_mount_wq; | |
3740 | } | |
3741 | if (EXT4_MOUNT_DATA_FLAGS & | |
3742 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
3743 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3744 | "data=, fs mounted w/o journal"); | |
3745 | goto failed_mount_wq; | |
3746 | } | |
3747 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
3748 | clear_opt(sb, JOURNAL_CHECKSUM); | |
fd8c37ec | 3749 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3750 | sbi->s_journal = NULL; |
3751 | needs_recovery = 0; | |
3752 | goto no_journal; | |
ac27a0ec DK |
3753 | } |
3754 | ||
e2b911c5 | 3755 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
3756 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3757 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3758 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3759 | goto failed_mount_wq; |
eb40a09c JS |
3760 | } |
3761 | ||
25ed6e8a DW |
3762 | if (!set_journal_csum_feature_set(sb)) { |
3763 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3764 | "feature set"); | |
3765 | goto failed_mount_wq; | |
d4da6c9c | 3766 | } |
818d276c | 3767 | |
ac27a0ec DK |
3768 | /* We have now updated the journal if required, so we can |
3769 | * validate the data journaling mode. */ | |
3770 | switch (test_opt(sb, DATA_FLAGS)) { | |
3771 | case 0: | |
3772 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3773 | * capabilities: ORDERED_DATA if the journal can |
3774 | * cope, else JOURNAL_DATA | |
3775 | */ | |
dab291af MC |
3776 | if (jbd2_journal_check_available_features |
3777 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3778 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3779 | else |
fd8c37ec | 3780 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3781 | break; |
3782 | ||
617ba13b MC |
3783 | case EXT4_MOUNT_ORDERED_DATA: |
3784 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3785 | if (!jbd2_journal_check_available_features |
3786 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3787 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3788 | "requested data journaling mode"); | |
744692dc | 3789 | goto failed_mount_wq; |
ac27a0ec DK |
3790 | } |
3791 | default: | |
3792 | break; | |
3793 | } | |
b3881f74 | 3794 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3795 | |
18aadd47 BJ |
3796 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3797 | ||
ce7e010a | 3798 | no_journal: |
9c191f70 M |
3799 | if (ext4_mballoc_ready) { |
3800 | sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); | |
3801 | if (!sbi->s_mb_cache) { | |
3802 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); | |
3803 | goto failed_mount_wq; | |
3804 | } | |
3805 | } | |
3806 | ||
e2b911c5 | 3807 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
1cb767cd TT |
3808 | (blocksize != PAGE_CACHE_SIZE)) { |
3809 | ext4_msg(sb, KERN_ERR, | |
3810 | "Unsupported blocksize for fs encryption"); | |
3811 | goto failed_mount_wq; | |
3812 | } | |
3813 | ||
e2b911c5 DW |
3814 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
3815 | !ext4_has_feature_encrypt(sb)) { | |
3816 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
3817 | ext4_commit_super(sb, 1); |
3818 | } | |
3819 | ||
952fc18e TT |
3820 | /* |
3821 | * Get the # of file system overhead blocks from the | |
3822 | * superblock if present. | |
3823 | */ | |
3824 | if (es->s_overhead_clusters) | |
3825 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3826 | else { | |
07aa2ea1 LC |
3827 | err = ext4_calculate_overhead(sb); |
3828 | if (err) | |
952fc18e TT |
3829 | goto failed_mount_wq; |
3830 | } | |
3831 | ||
fd89d5f2 TH |
3832 | /* |
3833 | * The maximum number of concurrent works can be high and | |
3834 | * concurrency isn't really necessary. Limit it to 1. | |
3835 | */ | |
2e8fa54e JK |
3836 | EXT4_SB(sb)->rsv_conversion_wq = |
3837 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
3838 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
3839 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 3840 | ret = -ENOMEM; |
2e8fa54e JK |
3841 | goto failed_mount4; |
3842 | } | |
3843 | ||
ac27a0ec | 3844 | /* |
dab291af | 3845 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3846 | * so we can safely mount the rest of the filesystem now. |
3847 | */ | |
3848 | ||
1d1fe1ee DH |
3849 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3850 | if (IS_ERR(root)) { | |
b31e1552 | 3851 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3852 | ret = PTR_ERR(root); |
32a9bb57 | 3853 | root = NULL; |
ac27a0ec DK |
3854 | goto failed_mount4; |
3855 | } | |
3856 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3857 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3858 | iput(root); |
ac27a0ec DK |
3859 | goto failed_mount4; |
3860 | } | |
48fde701 | 3861 | sb->s_root = d_make_root(root); |
1d1fe1ee | 3862 | if (!sb->s_root) { |
b31e1552 | 3863 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3864 | ret = -ENOMEM; |
3865 | goto failed_mount4; | |
3866 | } | |
ac27a0ec | 3867 | |
7e84b621 ES |
3868 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
3869 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
3870 | |
3871 | /* determine the minimum size of new large inodes, if present */ | |
3872 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3873 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3874 | EXT4_GOOD_OLD_INODE_SIZE; | |
e2b911c5 | 3875 | if (ext4_has_feature_extra_isize(sb)) { |
ef7f3835 KS |
3876 | if (sbi->s_want_extra_isize < |
3877 | le16_to_cpu(es->s_want_extra_isize)) | |
3878 | sbi->s_want_extra_isize = | |
3879 | le16_to_cpu(es->s_want_extra_isize); | |
3880 | if (sbi->s_want_extra_isize < | |
3881 | le16_to_cpu(es->s_min_extra_isize)) | |
3882 | sbi->s_want_extra_isize = | |
3883 | le16_to_cpu(es->s_min_extra_isize); | |
3884 | } | |
3885 | } | |
3886 | /* Check if enough inode space is available */ | |
3887 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3888 | sbi->s_inode_size) { | |
3889 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3890 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3891 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3892 | "available"); | |
ef7f3835 KS |
3893 | } |
3894 | ||
b5799018 | 3895 | ext4_set_resv_clusters(sb); |
27dd4385 | 3896 | |
6fd058f7 TT |
3897 | err = ext4_setup_system_zone(sb); |
3898 | if (err) { | |
b31e1552 | 3899 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3900 | "zone (%d)", err); |
f9ae9cf5 TT |
3901 | goto failed_mount4a; |
3902 | } | |
3903 | ||
3904 | ext4_ext_init(sb); | |
3905 | err = ext4_mb_init(sb); | |
3906 | if (err) { | |
3907 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
3908 | err); | |
dcf2d804 | 3909 | goto failed_mount5; |
c2774d84 AK |
3910 | } |
3911 | ||
d5e03cbb TT |
3912 | block = ext4_count_free_clusters(sb); |
3913 | ext4_free_blocks_count_set(sbi->s_es, | |
3914 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
3915 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
3916 | GFP_KERNEL); | |
d5e03cbb TT |
3917 | if (!err) { |
3918 | unsigned long freei = ext4_count_free_inodes(sb); | |
3919 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
3920 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
3921 | GFP_KERNEL); | |
d5e03cbb TT |
3922 | } |
3923 | if (!err) | |
3924 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 3925 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 3926 | if (!err) |
908c7f19 TH |
3927 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
3928 | GFP_KERNEL); | |
d5e03cbb TT |
3929 | if (err) { |
3930 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3931 | goto failed_mount6; | |
3932 | } | |
3933 | ||
e2b911c5 | 3934 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
3935 | if (!ext4_fill_flex_info(sb)) { |
3936 | ext4_msg(sb, KERN_ERR, | |
3937 | "unable to initialize " | |
3938 | "flex_bg meta info!"); | |
3939 | goto failed_mount6; | |
3940 | } | |
3941 | ||
bfff6873 LC |
3942 | err = ext4_register_li_request(sb, first_not_zeroed); |
3943 | if (err) | |
dcf2d804 | 3944 | goto failed_mount6; |
bfff6873 | 3945 | |
b5799018 | 3946 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
3947 | if (err) |
3948 | goto failed_mount7; | |
3197ebdb | 3949 | |
9b2ff357 JK |
3950 | #ifdef CONFIG_QUOTA |
3951 | /* Enable quota usage during mount. */ | |
e2b911c5 | 3952 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
9b2ff357 JK |
3953 | err = ext4_enable_quotas(sb); |
3954 | if (err) | |
3955 | goto failed_mount8; | |
3956 | } | |
3957 | #endif /* CONFIG_QUOTA */ | |
3958 | ||
617ba13b MC |
3959 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3960 | ext4_orphan_cleanup(sb, es); | |
3961 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3962 | if (needs_recovery) { |
b31e1552 | 3963 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3964 | ext4_mark_recovery_complete(sb, es); |
3965 | } | |
3966 | if (EXT4_SB(sb)->s_journal) { | |
3967 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3968 | descr = " journalled data mode"; | |
3969 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3970 | descr = " ordered data mode"; | |
3971 | else | |
3972 | descr = " writeback data mode"; | |
3973 | } else | |
3974 | descr = "out journal"; | |
3975 | ||
79add3a3 LC |
3976 | if (test_opt(sb, DISCARD)) { |
3977 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
3978 | if (!blk_queue_discard(q)) | |
3979 | ext4_msg(sb, KERN_WARNING, | |
3980 | "mounting with \"discard\" option, but " | |
3981 | "the device does not support discard"); | |
3982 | } | |
3983 | ||
e294a537 TT |
3984 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
3985 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
3986 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, | |
3987 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3988 | |
66e61a9e TT |
3989 | if (es->s_error_count) |
3990 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3991 | |
efbed4dc TT |
3992 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
3993 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
3994 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
3995 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
3996 | ||
d4c402d9 | 3997 | kfree(orig_data); |
ac27a0ec DK |
3998 | return 0; |
3999 | ||
617ba13b | 4000 | cantfind_ext4: |
ac27a0ec | 4001 | if (!silent) |
b31e1552 | 4002 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4003 | goto failed_mount; |
4004 | ||
72ba7450 TT |
4005 | #ifdef CONFIG_QUOTA |
4006 | failed_mount8: | |
ebd173be | 4007 | ext4_unregister_sysfs(sb); |
72ba7450 | 4008 | #endif |
dcf2d804 TM |
4009 | failed_mount7: |
4010 | ext4_unregister_li_request(sb); | |
4011 | failed_mount6: | |
f9ae9cf5 | 4012 | ext4_mb_release(sb); |
d5e03cbb | 4013 | if (sbi->s_flex_groups) |
b93b41d4 | 4014 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4015 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4016 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4017 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4018 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4019 | failed_mount5: |
f9ae9cf5 TT |
4020 | ext4_ext_release(sb); |
4021 | ext4_release_system_zone(sb); | |
4022 | failed_mount4a: | |
94bf608a | 4023 | dput(sb->s_root); |
32a9bb57 | 4024 | sb->s_root = NULL; |
94bf608a | 4025 | failed_mount4: |
b31e1552 | 4026 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4027 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4028 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4029 | failed_mount_wq: |
0390131b FM |
4030 | if (sbi->s_journal) { |
4031 | jbd2_journal_destroy(sbi->s_journal); | |
4032 | sbi->s_journal = NULL; | |
4033 | } | |
50460fe8 | 4034 | failed_mount3a: |
d3922a77 | 4035 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4036 | failed_mount3: |
9105bb14 | 4037 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4038 | if (sbi->s_mmp_tsk) |
4039 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4040 | failed_mount2: |
4041 | for (i = 0; i < db_count; i++) | |
4042 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4043 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4044 | failed_mount: |
0441984a DW |
4045 | if (sbi->s_chksum_driver) |
4046 | crypto_free_shash(sbi->s_chksum_driver); | |
ac27a0ec | 4047 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4048 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4049 | kfree(sbi->s_qf_names[i]); |
4050 | #endif | |
617ba13b | 4051 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4052 | brelse(bh); |
4053 | out_fail: | |
4054 | sb->s_fs_info = NULL; | |
f6830165 | 4055 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4056 | kfree(sbi); |
dcc7dae3 | 4057 | out_free_orig: |
d4c402d9 | 4058 | kfree(orig_data); |
07aa2ea1 | 4059 | return err ? err : ret; |
ac27a0ec DK |
4060 | } |
4061 | ||
4062 | /* | |
4063 | * Setup any per-fs journal parameters now. We'll do this both on | |
4064 | * initial mount, once the journal has been initialised but before we've | |
4065 | * done any recovery; and again on any subsequent remount. | |
4066 | */ | |
617ba13b | 4067 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4068 | { |
617ba13b | 4069 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4070 | |
30773840 TT |
4071 | journal->j_commit_interval = sbi->s_commit_interval; |
4072 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4073 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4074 | |
a931da6a | 4075 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4076 | if (test_opt(sb, BARRIER)) |
dab291af | 4077 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4078 | else |
dab291af | 4079 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4080 | if (test_opt(sb, DATA_ERR_ABORT)) |
4081 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4082 | else | |
4083 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4084 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4085 | } |
4086 | ||
617ba13b | 4087 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4088 | unsigned int journal_inum) |
4089 | { | |
4090 | struct inode *journal_inode; | |
4091 | journal_t *journal; | |
4092 | ||
e2b911c5 | 4093 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4094 | |
ac27a0ec DK |
4095 | /* First, test for the existence of a valid inode on disk. Bad |
4096 | * things happen if we iget() an unused inode, as the subsequent | |
4097 | * iput() will try to delete it. */ | |
4098 | ||
1d1fe1ee DH |
4099 | journal_inode = ext4_iget(sb, journal_inum); |
4100 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4101 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4102 | return NULL; |
4103 | } | |
4104 | if (!journal_inode->i_nlink) { | |
4105 | make_bad_inode(journal_inode); | |
4106 | iput(journal_inode); | |
b31e1552 | 4107 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4108 | return NULL; |
4109 | } | |
4110 | ||
e5f8eab8 | 4111 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4112 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4113 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4114 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4115 | iput(journal_inode); |
4116 | return NULL; | |
4117 | } | |
4118 | ||
dab291af | 4119 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4120 | if (!journal) { |
b31e1552 | 4121 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4122 | iput(journal_inode); |
4123 | return NULL; | |
4124 | } | |
4125 | journal->j_private = sb; | |
617ba13b | 4126 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4127 | return journal; |
4128 | } | |
4129 | ||
617ba13b | 4130 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4131 | dev_t j_dev) |
4132 | { | |
2b2d6d01 | 4133 | struct buffer_head *bh; |
ac27a0ec | 4134 | journal_t *journal; |
617ba13b MC |
4135 | ext4_fsblk_t start; |
4136 | ext4_fsblk_t len; | |
ac27a0ec | 4137 | int hblock, blocksize; |
617ba13b | 4138 | ext4_fsblk_t sb_block; |
ac27a0ec | 4139 | unsigned long offset; |
2b2d6d01 | 4140 | struct ext4_super_block *es; |
ac27a0ec DK |
4141 | struct block_device *bdev; |
4142 | ||
e2b911c5 | 4143 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4144 | |
b31e1552 | 4145 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4146 | if (bdev == NULL) |
4147 | return NULL; | |
4148 | ||
ac27a0ec | 4149 | blocksize = sb->s_blocksize; |
e1defc4f | 4150 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4151 | if (blocksize < hblock) { |
b31e1552 ES |
4152 | ext4_msg(sb, KERN_ERR, |
4153 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4154 | goto out_bdev; |
4155 | } | |
4156 | ||
617ba13b MC |
4157 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4158 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4159 | set_blocksize(bdev, blocksize); |
4160 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4161 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4162 | "external journal"); | |
ac27a0ec DK |
4163 | goto out_bdev; |
4164 | } | |
4165 | ||
2716b802 | 4166 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4167 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4168 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4169 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4170 | ext4_msg(sb, KERN_ERR, "external journal has " |
4171 | "bad superblock"); | |
ac27a0ec DK |
4172 | brelse(bh); |
4173 | goto out_bdev; | |
4174 | } | |
4175 | ||
df4763be DW |
4176 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4177 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4178 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4179 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4180 | "corrupt superblock"); | |
4181 | brelse(bh); | |
4182 | goto out_bdev; | |
4183 | } | |
4184 | ||
617ba13b | 4185 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4186 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4187 | brelse(bh); |
4188 | goto out_bdev; | |
4189 | } | |
4190 | ||
bd81d8ee | 4191 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4192 | start = sb_block + 1; |
4193 | brelse(bh); /* we're done with the superblock */ | |
4194 | ||
dab291af | 4195 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4196 | start, len, blocksize); |
4197 | if (!journal) { | |
b31e1552 | 4198 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4199 | goto out_bdev; |
4200 | } | |
4201 | journal->j_private = sb; | |
9f203507 | 4202 | ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4203 | wait_on_buffer(journal->j_sb_buffer); |
4204 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4205 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4206 | goto out_journal; |
4207 | } | |
4208 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4209 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4210 | "user (unsupported) - %d", | |
ac27a0ec DK |
4211 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4212 | goto out_journal; | |
4213 | } | |
617ba13b MC |
4214 | EXT4_SB(sb)->journal_bdev = bdev; |
4215 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4216 | return journal; |
0b8e58a1 | 4217 | |
ac27a0ec | 4218 | out_journal: |
dab291af | 4219 | jbd2_journal_destroy(journal); |
ac27a0ec | 4220 | out_bdev: |
617ba13b | 4221 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4222 | return NULL; |
4223 | } | |
4224 | ||
617ba13b MC |
4225 | static int ext4_load_journal(struct super_block *sb, |
4226 | struct ext4_super_block *es, | |
ac27a0ec DK |
4227 | unsigned long journal_devnum) |
4228 | { | |
4229 | journal_t *journal; | |
4230 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4231 | dev_t journal_dev; | |
4232 | int err = 0; | |
4233 | int really_read_only; | |
4234 | ||
e2b911c5 | 4235 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4236 | |
ac27a0ec DK |
4237 | if (journal_devnum && |
4238 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4239 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4240 | "numbers have changed"); | |
ac27a0ec DK |
4241 | journal_dev = new_decode_dev(journal_devnum); |
4242 | } else | |
4243 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4244 | ||
4245 | really_read_only = bdev_read_only(sb->s_bdev); | |
4246 | ||
4247 | /* | |
4248 | * Are we loading a blank journal or performing recovery after a | |
4249 | * crash? For recovery, we need to check in advance whether we | |
4250 | * can get read-write access to the device. | |
4251 | */ | |
e2b911c5 | 4252 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
ac27a0ec | 4253 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4254 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4255 | "required on readonly filesystem"); | |
ac27a0ec | 4256 | if (really_read_only) { |
b31e1552 ES |
4257 | ext4_msg(sb, KERN_ERR, "write access " |
4258 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4259 | return -EROFS; |
4260 | } | |
b31e1552 ES |
4261 | ext4_msg(sb, KERN_INFO, "write access will " |
4262 | "be enabled during recovery"); | |
ac27a0ec DK |
4263 | } |
4264 | } | |
4265 | ||
4266 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4267 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4268 | "and inode journals!"); | |
ac27a0ec DK |
4269 | return -EINVAL; |
4270 | } | |
4271 | ||
4272 | if (journal_inum) { | |
617ba13b | 4273 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4274 | return -EINVAL; |
4275 | } else { | |
617ba13b | 4276 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4277 | return -EINVAL; |
4278 | } | |
4279 | ||
90576c0b | 4280 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4281 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4282 | |
e2b911c5 | 4283 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4284 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4285 | if (!err) { |
4286 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4287 | if (save) | |
4288 | memcpy(save, ((char *) es) + | |
4289 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4290 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4291 | if (save) |
4292 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4293 | save, EXT4_S_ERR_LEN); | |
4294 | kfree(save); | |
4295 | } | |
ac27a0ec DK |
4296 | |
4297 | if (err) { | |
b31e1552 | 4298 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4299 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4300 | return err; |
4301 | } | |
4302 | ||
617ba13b MC |
4303 | EXT4_SB(sb)->s_journal = journal; |
4304 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4305 | |
c41303ce | 4306 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4307 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4308 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4309 | |
4310 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4311 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4312 | } |
4313 | ||
4314 | return 0; | |
4315 | } | |
4316 | ||
e2d67052 | 4317 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4318 | { |
e2d67052 | 4319 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4320 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4321 | int error = 0; |
ac27a0ec | 4322 | |
bdfe0cbd | 4323 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4324 | return error; |
914258bf TT |
4325 | if (buffer_write_io_error(sbh)) { |
4326 | /* | |
4327 | * Oh, dear. A previous attempt to write the | |
4328 | * superblock failed. This could happen because the | |
4329 | * USB device was yanked out. Or it could happen to | |
4330 | * be a transient write error and maybe the block will | |
4331 | * be remapped. Nothing we can do but to retry the | |
4332 | * write and hope for the best. | |
4333 | */ | |
b31e1552 ES |
4334 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4335 | "superblock detected"); | |
914258bf TT |
4336 | clear_buffer_write_io_error(sbh); |
4337 | set_buffer_uptodate(sbh); | |
4338 | } | |
71290b36 TT |
4339 | /* |
4340 | * If the file system is mounted read-only, don't update the | |
4341 | * superblock write time. This avoids updating the superblock | |
4342 | * write time when we are mounting the root file system | |
4343 | * read/only but we need to replay the journal; at that point, | |
4344 | * for people who are east of GMT and who make their clock | |
4345 | * tick in localtime for Windows bug-for-bug compatibility, | |
4346 | * the clock is set in the future, and this will cause e2fsck | |
4347 | * to complain and force a full file system check. | |
4348 | */ | |
4349 | if (!(sb->s_flags & MS_RDONLY)) | |
4350 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4351 | if (sb->s_bdev->bd_part) |
4352 | es->s_kbytes_written = | |
4353 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4354 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4355 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4356 | else |
4357 | es->s_kbytes_written = | |
4358 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4359 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4360 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4361 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4362 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4363 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4364 | es->s_free_inodes_count = | |
4365 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4366 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4367 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4368 | ext4_superblock_csum_set(sb); |
ac27a0ec | 4369 | mark_buffer_dirty(sbh); |
914258bf | 4370 | if (sync) { |
564bc402 DJ |
4371 | error = __sync_dirty_buffer(sbh, |
4372 | test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); | |
c4be0c1d TS |
4373 | if (error) |
4374 | return error; | |
4375 | ||
4376 | error = buffer_write_io_error(sbh); | |
4377 | if (error) { | |
b31e1552 ES |
4378 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4379 | "superblock"); | |
914258bf TT |
4380 | clear_buffer_write_io_error(sbh); |
4381 | set_buffer_uptodate(sbh); | |
4382 | } | |
4383 | } | |
c4be0c1d | 4384 | return error; |
ac27a0ec DK |
4385 | } |
4386 | ||
ac27a0ec DK |
4387 | /* |
4388 | * Have we just finished recovery? If so, and if we are mounting (or | |
4389 | * remounting) the filesystem readonly, then we will end up with a | |
4390 | * consistent fs on disk. Record that fact. | |
4391 | */ | |
2b2d6d01 TT |
4392 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4393 | struct ext4_super_block *es) | |
ac27a0ec | 4394 | { |
617ba13b | 4395 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4396 | |
e2b911c5 | 4397 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
4398 | BUG_ON(journal != NULL); |
4399 | return; | |
4400 | } | |
dab291af | 4401 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4402 | if (jbd2_journal_flush(journal) < 0) |
4403 | goto out; | |
4404 | ||
e2b911c5 | 4405 | if (ext4_has_feature_journal_needs_recovery(sb) && |
ac27a0ec | 4406 | sb->s_flags & MS_RDONLY) { |
e2b911c5 | 4407 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 4408 | ext4_commit_super(sb, 1); |
ac27a0ec | 4409 | } |
7ffe1ea8 HK |
4410 | |
4411 | out: | |
dab291af | 4412 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4413 | } |
4414 | ||
4415 | /* | |
4416 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4417 | * has recorded an error from a previous lifetime, move that error to the | |
4418 | * main filesystem now. | |
4419 | */ | |
2b2d6d01 TT |
4420 | static void ext4_clear_journal_err(struct super_block *sb, |
4421 | struct ext4_super_block *es) | |
ac27a0ec DK |
4422 | { |
4423 | journal_t *journal; | |
4424 | int j_errno; | |
4425 | const char *errstr; | |
4426 | ||
e2b911c5 | 4427 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4428 | |
617ba13b | 4429 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4430 | |
4431 | /* | |
4432 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4433 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4434 | */ |
4435 | ||
dab291af | 4436 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4437 | if (j_errno) { |
4438 | char nbuf[16]; | |
4439 | ||
617ba13b | 4440 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4441 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4442 | "from previous mount: %s", errstr); |
12062ddd | 4443 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4444 | |
617ba13b MC |
4445 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4446 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4447 | ext4_commit_super(sb, 1); |
ac27a0ec | 4448 | |
dab291af | 4449 | jbd2_journal_clear_err(journal); |
d796c52e | 4450 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4451 | } |
4452 | } | |
4453 | ||
4454 | /* | |
4455 | * Force the running and committing transactions to commit, | |
4456 | * and wait on the commit. | |
4457 | */ | |
617ba13b | 4458 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4459 | { |
4460 | journal_t *journal; | |
ac27a0ec DK |
4461 | |
4462 | if (sb->s_flags & MS_RDONLY) | |
4463 | return 0; | |
4464 | ||
617ba13b | 4465 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4466 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4467 | } |
4468 | ||
617ba13b | 4469 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4470 | { |
14ce0cb4 | 4471 | int ret = 0; |
9eddacf9 | 4472 | tid_t target; |
06a407f1 | 4473 | bool needs_barrier = false; |
8d5d02e6 | 4474 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4475 | |
9bffad1e | 4476 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4477 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4478 | /* |
4479 | * Writeback quota in non-journalled quota case - journalled quota has | |
4480 | * no dirty dquots | |
4481 | */ | |
4482 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4483 | /* |
4484 | * Data writeback is possible w/o journal transaction, so barrier must | |
4485 | * being sent at the end of the function. But we can skip it if | |
4486 | * transaction_commit will do it for us. | |
4487 | */ | |
bda32530 TT |
4488 | if (sbi->s_journal) { |
4489 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4490 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4491 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4492 | needs_barrier = true; | |
4493 | ||
4494 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4495 | if (wait) | |
4496 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4497 | target); | |
4498 | } | |
4499 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4500 | needs_barrier = true; |
06a407f1 DM |
4501 | if (needs_barrier) { |
4502 | int err; | |
4503 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4504 | if (!ret) | |
4505 | ret = err; | |
0390131b | 4506 | } |
06a407f1 DM |
4507 | |
4508 | return ret; | |
4509 | } | |
4510 | ||
ac27a0ec DK |
4511 | /* |
4512 | * LVM calls this function before a (read-only) snapshot is created. This | |
4513 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4514 | * |
4515 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4516 | * state independently. It relies on upper layer to stop all data & metadata |
4517 | * modifications. | |
ac27a0ec | 4518 | */ |
c4be0c1d | 4519 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4520 | { |
c4be0c1d TS |
4521 | int error = 0; |
4522 | journal_t *journal; | |
ac27a0ec | 4523 | |
9ca92389 TT |
4524 | if (sb->s_flags & MS_RDONLY) |
4525 | return 0; | |
ac27a0ec | 4526 | |
9ca92389 | 4527 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4528 | |
bb044576 TT |
4529 | if (journal) { |
4530 | /* Now we set up the journal barrier. */ | |
4531 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4532 | |
bb044576 TT |
4533 | /* |
4534 | * Don't clear the needs_recovery flag if we failed to | |
4535 | * flush the journal. | |
4536 | */ | |
4537 | error = jbd2_journal_flush(journal); | |
4538 | if (error < 0) | |
4539 | goto out; | |
c642dc9e ES |
4540 | |
4541 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 4542 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 4543 | } |
9ca92389 | 4544 | |
9ca92389 | 4545 | error = ext4_commit_super(sb, 1); |
6b0310fb | 4546 | out: |
bb044576 TT |
4547 | if (journal) |
4548 | /* we rely on upper layer to stop further updates */ | |
4549 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4550 | return error; |
ac27a0ec DK |
4551 | } |
4552 | ||
4553 | /* | |
4554 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4555 | * flag here, even though the filesystem is not technically dirty yet. | |
4556 | */ | |
c4be0c1d | 4557 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4558 | { |
9ca92389 TT |
4559 | if (sb->s_flags & MS_RDONLY) |
4560 | return 0; | |
4561 | ||
c642dc9e ES |
4562 | if (EXT4_SB(sb)->s_journal) { |
4563 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 4564 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
4565 | } |
4566 | ||
9ca92389 | 4567 | ext4_commit_super(sb, 1); |
c4be0c1d | 4568 | return 0; |
ac27a0ec DK |
4569 | } |
4570 | ||
673c6100 TT |
4571 | /* |
4572 | * Structure to save mount options for ext4_remount's benefit | |
4573 | */ | |
4574 | struct ext4_mount_options { | |
4575 | unsigned long s_mount_opt; | |
a2595b8a | 4576 | unsigned long s_mount_opt2; |
08cefc7a EB |
4577 | kuid_t s_resuid; |
4578 | kgid_t s_resgid; | |
673c6100 TT |
4579 | unsigned long s_commit_interval; |
4580 | u32 s_min_batch_time, s_max_batch_time; | |
4581 | #ifdef CONFIG_QUOTA | |
4582 | int s_jquota_fmt; | |
a2d4a646 | 4583 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4584 | #endif |
4585 | }; | |
4586 | ||
2b2d6d01 | 4587 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4588 | { |
2b2d6d01 | 4589 | struct ext4_super_block *es; |
617ba13b | 4590 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4591 | unsigned long old_sb_flags; |
617ba13b | 4592 | struct ext4_mount_options old_opts; |
c79d967d | 4593 | int enable_quota = 0; |
8a266467 | 4594 | ext4_group_t g; |
b3881f74 | 4595 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4596 | int err = 0; |
ac27a0ec | 4597 | #ifdef CONFIG_QUOTA |
03dafb5f | 4598 | int i, j; |
ac27a0ec | 4599 | #endif |
d4c402d9 | 4600 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4601 | |
4602 | /* Store the original options */ | |
4603 | old_sb_flags = sb->s_flags; | |
4604 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4605 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4606 | old_opts.s_resuid = sbi->s_resuid; |
4607 | old_opts.s_resgid = sbi->s_resgid; | |
4608 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4609 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4610 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4611 | #ifdef CONFIG_QUOTA |
4612 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 4613 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
4614 | if (sbi->s_qf_names[i]) { |
4615 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4616 | GFP_KERNEL); | |
4617 | if (!old_opts.s_qf_names[i]) { | |
4618 | for (j = 0; j < i; j++) | |
4619 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4620 | kfree(orig_data); |
03dafb5f CG |
4621 | return -ENOMEM; |
4622 | } | |
4623 | } else | |
4624 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4625 | #endif |
b3881f74 TT |
4626 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4627 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 4628 | |
661aa520 | 4629 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4630 | err = -EINVAL; |
4631 | goto restore_opts; | |
4632 | } | |
4633 | ||
6b992ff2 | 4634 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
4635 | test_opt(sb, JOURNAL_CHECKSUM)) { |
4636 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
4637 | "during remount not supported; ignoring"); |
4638 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
4639 | } |
4640 | ||
6ae6514b PS |
4641 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4642 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4643 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4644 | "both data=journal and delalloc"); | |
4645 | err = -EINVAL; | |
4646 | goto restore_opts; | |
4647 | } | |
4648 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4649 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4650 | "both data=journal and dioread_nolock"); | |
4651 | err = -EINVAL; | |
4652 | goto restore_opts; | |
4653 | } | |
923ae0ff RZ |
4654 | if (test_opt(sb, DAX)) { |
4655 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4656 | "both data=journal and dax"); | |
4657 | err = -EINVAL; | |
4658 | goto restore_opts; | |
4659 | } | |
4660 | } | |
4661 | ||
4662 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { | |
4663 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
4664 | "dax flag with busy inodes while remounting"); | |
4665 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
4666 | } |
4667 | ||
4ab2f15b | 4668 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4669 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4670 | |
4671 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4672 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4673 | |
4674 | es = sbi->s_es; | |
4675 | ||
b3881f74 | 4676 | if (sbi->s_journal) { |
0390131b | 4677 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4678 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4679 | } | |
ac27a0ec | 4680 | |
a2fd66d0 TT |
4681 | if (*flags & MS_LAZYTIME) |
4682 | sb->s_flags |= MS_LAZYTIME; | |
4683 | ||
661aa520 | 4684 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4685 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4686 | err = -EROFS; |
4687 | goto restore_opts; | |
4688 | } | |
4689 | ||
4690 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
4691 | err = sync_filesystem(sb); |
4692 | if (err < 0) | |
4693 | goto restore_opts; | |
0f0dd62f CH |
4694 | err = dquot_suspend(sb, -1); |
4695 | if (err < 0) | |
c79d967d | 4696 | goto restore_opts; |
c79d967d | 4697 | |
ac27a0ec DK |
4698 | /* |
4699 | * First of all, the unconditional stuff we have to do | |
4700 | * to disable replay of the journal when we next remount | |
4701 | */ | |
4702 | sb->s_flags |= MS_RDONLY; | |
4703 | ||
4704 | /* | |
4705 | * OK, test if we are remounting a valid rw partition | |
4706 | * readonly, and if so set the rdonly flag and then | |
4707 | * mark the partition as valid again. | |
4708 | */ | |
617ba13b MC |
4709 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4710 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4711 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4712 | ||
a63c9eb2 | 4713 | if (sbi->s_journal) |
0390131b | 4714 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4715 | } else { |
a13fb1a4 | 4716 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 4717 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 4718 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
4719 | err = -EROFS; |
4720 | goto restore_opts; | |
4721 | } | |
8a266467 TT |
4722 | /* |
4723 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4724 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4725 | */ |
4726 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4727 | struct ext4_group_desc *gdp = | |
4728 | ext4_get_group_desc(sb, g, NULL); | |
4729 | ||
feb0ab32 | 4730 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4731 | ext4_msg(sb, KERN_ERR, |
4732 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 4733 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 4734 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 4735 | err = -EFSBADCRC; |
8a266467 TT |
4736 | goto restore_opts; |
4737 | } | |
4738 | } | |
4739 | ||
ead6596b ES |
4740 | /* |
4741 | * If we have an unprocessed orphan list hanging | |
4742 | * around from a previously readonly bdev mount, | |
4743 | * require a full umount/remount for now. | |
4744 | */ | |
4745 | if (es->s_last_orphan) { | |
b31e1552 | 4746 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4747 | "remount RDWR because of unprocessed " |
4748 | "orphan inode list. Please " | |
b31e1552 | 4749 | "umount/remount instead"); |
ead6596b ES |
4750 | err = -EINVAL; |
4751 | goto restore_opts; | |
4752 | } | |
4753 | ||
ac27a0ec DK |
4754 | /* |
4755 | * Mounting a RDONLY partition read-write, so reread | |
4756 | * and store the current valid flag. (It may have | |
4757 | * been changed by e2fsck since we originally mounted | |
4758 | * the partition.) | |
4759 | */ | |
0390131b FM |
4760 | if (sbi->s_journal) |
4761 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4762 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4763 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4764 | sb->s_flags &= ~MS_RDONLY; |
e2b911c5 | 4765 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
4766 | if (ext4_multi_mount_protect(sb, |
4767 | le64_to_cpu(es->s_mmp_block))) { | |
4768 | err = -EROFS; | |
4769 | goto restore_opts; | |
4770 | } | |
c79d967d | 4771 | enable_quota = 1; |
ac27a0ec DK |
4772 | } |
4773 | } | |
bfff6873 LC |
4774 | |
4775 | /* | |
4776 | * Reinitialize lazy itable initialization thread based on | |
4777 | * current settings | |
4778 | */ | |
4779 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4780 | ext4_unregister_li_request(sb); | |
4781 | else { | |
4782 | ext4_group_t first_not_zeroed; | |
4783 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4784 | ext4_register_li_request(sb, first_not_zeroed); | |
4785 | } | |
4786 | ||
6fd058f7 | 4787 | ext4_setup_system_zone(sb); |
d096ad0f | 4788 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 4789 | ext4_commit_super(sb, 1); |
0390131b | 4790 | |
ac27a0ec DK |
4791 | #ifdef CONFIG_QUOTA |
4792 | /* Release old quota file names */ | |
a2d4a646 | 4793 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 4794 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
4795 | if (enable_quota) { |
4796 | if (sb_any_quota_suspended(sb)) | |
4797 | dquot_resume(sb, -1); | |
e2b911c5 | 4798 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 4799 | err = ext4_enable_quotas(sb); |
07724f98 | 4800 | if (err) |
7c319d32 | 4801 | goto restore_opts; |
7c319d32 AK |
4802 | } |
4803 | } | |
ac27a0ec | 4804 | #endif |
d4c402d9 | 4805 | |
a26f4992 | 4806 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
4807 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
4808 | kfree(orig_data); | |
ac27a0ec | 4809 | return 0; |
0b8e58a1 | 4810 | |
ac27a0ec DK |
4811 | restore_opts: |
4812 | sb->s_flags = old_sb_flags; | |
4813 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4814 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4815 | sbi->s_resuid = old_opts.s_resuid; |
4816 | sbi->s_resgid = old_opts.s_resgid; | |
4817 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4818 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4819 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4820 | #ifdef CONFIG_QUOTA |
4821 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 4822 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 4823 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
4824 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
4825 | } | |
4826 | #endif | |
d4c402d9 | 4827 | kfree(orig_data); |
ac27a0ec DK |
4828 | return err; |
4829 | } | |
4830 | ||
689c958c LX |
4831 | #ifdef CONFIG_QUOTA |
4832 | static int ext4_statfs_project(struct super_block *sb, | |
4833 | kprojid_t projid, struct kstatfs *buf) | |
4834 | { | |
4835 | struct kqid qid; | |
4836 | struct dquot *dquot; | |
4837 | u64 limit; | |
4838 | u64 curblock; | |
4839 | ||
4840 | qid = make_kqid_projid(projid); | |
4841 | dquot = dqget(sb, qid); | |
4842 | if (IS_ERR(dquot)) | |
4843 | return PTR_ERR(dquot); | |
4844 | spin_lock(&dq_data_lock); | |
4845 | ||
4846 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? | |
4847 | dquot->dq_dqb.dqb_bsoftlimit : | |
4848 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; | |
4849 | if (limit && buf->f_blocks > limit) { | |
4850 | curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; | |
4851 | buf->f_blocks = limit; | |
4852 | buf->f_bfree = buf->f_bavail = | |
4853 | (buf->f_blocks > curblock) ? | |
4854 | (buf->f_blocks - curblock) : 0; | |
4855 | } | |
4856 | ||
4857 | limit = dquot->dq_dqb.dqb_isoftlimit ? | |
4858 | dquot->dq_dqb.dqb_isoftlimit : | |
4859 | dquot->dq_dqb.dqb_ihardlimit; | |
4860 | if (limit && buf->f_files > limit) { | |
4861 | buf->f_files = limit; | |
4862 | buf->f_ffree = | |
4863 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
4864 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
4865 | } | |
4866 | ||
4867 | spin_unlock(&dq_data_lock); | |
4868 | dqput(dquot); | |
4869 | return 0; | |
4870 | } | |
4871 | #endif | |
4872 | ||
2b2d6d01 | 4873 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4874 | { |
4875 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4876 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4877 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 4878 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 4879 | u64 fsid; |
d02a9391 | 4880 | s64 bfree; |
27dd4385 | 4881 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 4882 | |
952fc18e TT |
4883 | if (!test_opt(sb, MINIX_DF)) |
4884 | overhead = sbi->s_overhead; | |
ac27a0ec | 4885 | |
617ba13b | 4886 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4887 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 4888 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
4889 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4890 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4891 | /* prevent underflow in case that few free space is available */ |
57042651 | 4892 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
4893 | buf->f_bavail = buf->f_bfree - |
4894 | (ext4_r_blocks_count(es) + resv_blocks); | |
4895 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
4896 | buf->f_bavail = 0; |
4897 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4898 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4899 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4900 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4901 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4902 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4903 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4904 | |
689c958c LX |
4905 | #ifdef CONFIG_QUOTA |
4906 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
4907 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
4908 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
4909 | #endif | |
ac27a0ec DK |
4910 | return 0; |
4911 | } | |
4912 | ||
0b8e58a1 AD |
4913 | /* Helper function for writing quotas on sync - we need to start transaction |
4914 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4915 | * Process 1 Process 2 |
617ba13b | 4916 | * ext4_create() quota_sync() |
a269eb18 | 4917 | * jbd2_journal_start() write_dquot() |
871a2931 | 4918 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4919 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4920 | * |
4921 | */ | |
4922 | ||
4923 | #ifdef CONFIG_QUOTA | |
4924 | ||
4925 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4926 | { | |
4c376dca | 4927 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
4928 | } |
4929 | ||
617ba13b | 4930 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4931 | { |
4932 | int ret, err; | |
4933 | handle_t *handle; | |
4934 | struct inode *inode; | |
4935 | ||
4936 | inode = dquot_to_inode(dquot); | |
9924a92a | 4937 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 4938 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4939 | if (IS_ERR(handle)) |
4940 | return PTR_ERR(handle); | |
4941 | ret = dquot_commit(dquot); | |
617ba13b | 4942 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4943 | if (!ret) |
4944 | ret = err; | |
4945 | return ret; | |
4946 | } | |
4947 | ||
617ba13b | 4948 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4949 | { |
4950 | int ret, err; | |
4951 | handle_t *handle; | |
4952 | ||
9924a92a | 4953 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4954 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4955 | if (IS_ERR(handle)) |
4956 | return PTR_ERR(handle); | |
4957 | ret = dquot_acquire(dquot); | |
617ba13b | 4958 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4959 | if (!ret) |
4960 | ret = err; | |
4961 | return ret; | |
4962 | } | |
4963 | ||
617ba13b | 4964 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4965 | { |
4966 | int ret, err; | |
4967 | handle_t *handle; | |
4968 | ||
9924a92a | 4969 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4970 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4971 | if (IS_ERR(handle)) { |
4972 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4973 | dquot_release(dquot); | |
ac27a0ec | 4974 | return PTR_ERR(handle); |
9c3013e9 | 4975 | } |
ac27a0ec | 4976 | ret = dquot_release(dquot); |
617ba13b | 4977 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4978 | if (!ret) |
4979 | ret = err; | |
4980 | return ret; | |
4981 | } | |
4982 | ||
617ba13b | 4983 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4984 | { |
262b4662 JK |
4985 | struct super_block *sb = dquot->dq_sb; |
4986 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4987 | ||
2c8be6b2 | 4988 | /* Are we journaling quotas? */ |
e2b911c5 | 4989 | if (ext4_has_feature_quota(sb) || |
262b4662 | 4990 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 4991 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4992 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4993 | } else { |
4994 | return dquot_mark_dquot_dirty(dquot); | |
4995 | } | |
4996 | } | |
4997 | ||
617ba13b | 4998 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4999 | { |
5000 | int ret, err; | |
5001 | handle_t *handle; | |
5002 | ||
5003 | /* Data block + inode block */ | |
2b0143b5 | 5004 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5005 | if (IS_ERR(handle)) |
5006 | return PTR_ERR(handle); | |
5007 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5008 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5009 | if (!ret) |
5010 | ret = err; | |
5011 | return ret; | |
5012 | } | |
5013 | ||
5014 | /* | |
5015 | * Turn on quotas during mount time - we need to find | |
5016 | * the quota file and such... | |
5017 | */ | |
617ba13b | 5018 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5019 | { |
287a8095 CH |
5020 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5021 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5022 | } |
5023 | ||
5024 | /* | |
5025 | * Standard function to be called on quota_on | |
5026 | */ | |
617ba13b | 5027 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 5028 | struct path *path) |
ac27a0ec DK |
5029 | { |
5030 | int err; | |
ac27a0ec DK |
5031 | |
5032 | if (!test_opt(sb, QUOTA)) | |
5033 | return -EINVAL; | |
0623543b | 5034 | |
ac27a0ec | 5035 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5036 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5037 | return -EXDEV; |
0623543b JK |
5038 | /* Journaling quota? */ |
5039 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5040 | /* Quotafile not in fs root? */ |
f00c9e44 | 5041 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5042 | ext4_msg(sb, KERN_WARNING, |
5043 | "Quota file not on filesystem root. " | |
5044 | "Journaled quota will not work"); | |
2b2d6d01 | 5045 | } |
0623543b JK |
5046 | |
5047 | /* | |
5048 | * When we journal data on quota file, we have to flush journal to see | |
5049 | * all updates to the file when we bypass pagecache... | |
5050 | */ | |
0390131b | 5051 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5052 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5053 | /* |
5054 | * We don't need to lock updates but journal_flush() could | |
5055 | * otherwise be livelocked... | |
5056 | */ | |
5057 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5058 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5059 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5060 | if (err) |
7ffe1ea8 | 5061 | return err; |
0623543b JK |
5062 | } |
5063 | ||
f00c9e44 | 5064 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
5065 | } |
5066 | ||
7c319d32 AK |
5067 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5068 | unsigned int flags) | |
5069 | { | |
5070 | int err; | |
5071 | struct inode *qf_inode; | |
a2d4a646 | 5072 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5073 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5074 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5075 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5076 | }; |
5077 | ||
e2b911c5 | 5078 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5079 | |
5080 | if (!qf_inums[type]) | |
5081 | return -EPERM; | |
5082 | ||
5083 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5084 | if (IS_ERR(qf_inode)) { | |
5085 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5086 | return PTR_ERR(qf_inode); | |
5087 | } | |
5088 | ||
bcb13850 JK |
5089 | /* Don't account quota for quota files to avoid recursion */ |
5090 | qf_inode->i_flags |= S_NOQUOTA; | |
7c319d32 AK |
5091 | err = dquot_enable(qf_inode, type, format_id, flags); |
5092 | iput(qf_inode); | |
5093 | ||
5094 | return err; | |
5095 | } | |
5096 | ||
5097 | /* Enable usage tracking for all quota types. */ | |
5098 | static int ext4_enable_quotas(struct super_block *sb) | |
5099 | { | |
5100 | int type, err = 0; | |
a2d4a646 | 5101 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5102 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5103 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5104 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5105 | }; |
5106 | ||
5107 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5108 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5109 | if (qf_inums[type]) { |
5110 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5111 | DQUOT_USAGE_ENABLED); | |
5112 | if (err) { | |
5113 | ext4_warning(sb, | |
72ba7450 TT |
5114 | "Failed to enable quota tracking " |
5115 | "(type=%d, err=%d). Please run " | |
5116 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5117 | return err; |
5118 | } | |
5119 | } | |
5120 | } | |
5121 | return 0; | |
5122 | } | |
5123 | ||
ca0e05e4 DM |
5124 | static int ext4_quota_off(struct super_block *sb, int type) |
5125 | { | |
21f97697 JK |
5126 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5127 | handle_t *handle; | |
5128 | ||
87009d86 DM |
5129 | /* Force all delayed allocation blocks to be allocated. |
5130 | * Caller already holds s_umount sem */ | |
5131 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5132 | sync_filesystem(sb); |
ca0e05e4 | 5133 | |
0b268590 AG |
5134 | if (!inode) |
5135 | goto out; | |
5136 | ||
21f97697 JK |
5137 | /* Update modification times of quota files when userspace can |
5138 | * start looking at them */ | |
9924a92a | 5139 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5140 | if (IS_ERR(handle)) |
5141 | goto out; | |
5142 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5143 | ext4_mark_inode_dirty(handle, inode); | |
5144 | ext4_journal_stop(handle); | |
5145 | ||
5146 | out: | |
ca0e05e4 DM |
5147 | return dquot_quota_off(sb, type); |
5148 | } | |
5149 | ||
ac27a0ec DK |
5150 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5151 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5152 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5153 | * we don't have to be afraid of races */ |
617ba13b | 5154 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5155 | size_t len, loff_t off) |
5156 | { | |
5157 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5158 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5159 | int offset = off & (sb->s_blocksize - 1); |
5160 | int tocopy; | |
5161 | size_t toread; | |
5162 | struct buffer_head *bh; | |
5163 | loff_t i_size = i_size_read(inode); | |
5164 | ||
5165 | if (off > i_size) | |
5166 | return 0; | |
5167 | if (off+len > i_size) | |
5168 | len = i_size-off; | |
5169 | toread = len; | |
5170 | while (toread > 0) { | |
5171 | tocopy = sb->s_blocksize - offset < toread ? | |
5172 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5173 | bh = ext4_bread(NULL, inode, blk, 0); |
5174 | if (IS_ERR(bh)) | |
5175 | return PTR_ERR(bh); | |
ac27a0ec DK |
5176 | if (!bh) /* A hole? */ |
5177 | memset(data, 0, tocopy); | |
5178 | else | |
5179 | memcpy(data, bh->b_data+offset, tocopy); | |
5180 | brelse(bh); | |
5181 | offset = 0; | |
5182 | toread -= tocopy; | |
5183 | data += tocopy; | |
5184 | blk++; | |
5185 | } | |
5186 | return len; | |
5187 | } | |
5188 | ||
5189 | /* Write to quotafile (we know the transaction is already started and has | |
5190 | * enough credits) */ | |
617ba13b | 5191 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5192 | const char *data, size_t len, loff_t off) |
5193 | { | |
5194 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5195 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5196 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5197 | int retries = 0; |
ac27a0ec DK |
5198 | struct buffer_head *bh; |
5199 | handle_t *handle = journal_current_handle(); | |
5200 | ||
0390131b | 5201 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5202 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5203 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5204 | (unsigned long long)off, (unsigned long long)len); |
5205 | return -EIO; | |
5206 | } | |
67eeb568 DM |
5207 | /* |
5208 | * Since we account only one data block in transaction credits, | |
5209 | * then it is impossible to cross a block boundary. | |
5210 | */ | |
5211 | if (sb->s_blocksize - offset < len) { | |
5212 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5213 | " cancelled because not block aligned", | |
5214 | (unsigned long long)off, (unsigned long long)len); | |
5215 | return -EIO; | |
5216 | } | |
5217 | ||
c5e298ae TT |
5218 | do { |
5219 | bh = ext4_bread(handle, inode, blk, | |
5220 | EXT4_GET_BLOCKS_CREATE | | |
5221 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5222 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5223 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5224 | if (IS_ERR(bh)) |
5225 | return PTR_ERR(bh); | |
67eeb568 DM |
5226 | if (!bh) |
5227 | goto out; | |
5d601255 | 5228 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5229 | err = ext4_journal_get_write_access(handle, bh); |
5230 | if (err) { | |
5231 | brelse(bh); | |
1c215028 | 5232 | return err; |
ac27a0ec | 5233 | } |
67eeb568 DM |
5234 | lock_buffer(bh); |
5235 | memcpy(bh->b_data+offset, data, len); | |
5236 | flush_dcache_page(bh->b_page); | |
5237 | unlock_buffer(bh); | |
62d2b5f2 | 5238 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5239 | brelse(bh); |
ac27a0ec | 5240 | out: |
67eeb568 DM |
5241 | if (inode->i_size < off + len) { |
5242 | i_size_write(inode, off + len); | |
617ba13b | 5243 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5244 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5245 | } |
67eeb568 | 5246 | return len; |
ac27a0ec DK |
5247 | } |
5248 | ||
5249 | #endif | |
5250 | ||
152a0836 AV |
5251 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5252 | const char *dev_name, void *data) | |
ac27a0ec | 5253 | { |
152a0836 | 5254 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5255 | } |
5256 | ||
c290ea01 | 5257 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
5258 | static inline void register_as_ext2(void) |
5259 | { | |
5260 | int err = register_filesystem(&ext2_fs_type); | |
5261 | if (err) | |
5262 | printk(KERN_WARNING | |
5263 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5264 | } | |
5265 | ||
5266 | static inline void unregister_as_ext2(void) | |
5267 | { | |
5268 | unregister_filesystem(&ext2_fs_type); | |
5269 | } | |
2035e776 TT |
5270 | |
5271 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5272 | { | |
e2b911c5 | 5273 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 TT |
5274 | return 0; |
5275 | if (sb->s_flags & MS_RDONLY) | |
5276 | return 1; | |
e2b911c5 | 5277 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
5278 | return 0; |
5279 | return 1; | |
5280 | } | |
24b58424 TT |
5281 | #else |
5282 | static inline void register_as_ext2(void) { } | |
5283 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5284 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5285 | #endif |
5286 | ||
24b58424 TT |
5287 | static inline void register_as_ext3(void) |
5288 | { | |
5289 | int err = register_filesystem(&ext3_fs_type); | |
5290 | if (err) | |
5291 | printk(KERN_WARNING | |
5292 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5293 | } | |
5294 | ||
5295 | static inline void unregister_as_ext3(void) | |
5296 | { | |
5297 | unregister_filesystem(&ext3_fs_type); | |
5298 | } | |
2035e776 TT |
5299 | |
5300 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5301 | { | |
e2b911c5 | 5302 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 5303 | return 0; |
e2b911c5 | 5304 | if (!ext4_has_feature_journal(sb)) |
2035e776 TT |
5305 | return 0; |
5306 | if (sb->s_flags & MS_RDONLY) | |
5307 | return 1; | |
e2b911c5 | 5308 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
5309 | return 0; |
5310 | return 1; | |
5311 | } | |
24b58424 | 5312 | |
03010a33 TT |
5313 | static struct file_system_type ext4_fs_type = { |
5314 | .owner = THIS_MODULE, | |
5315 | .name = "ext4", | |
152a0836 | 5316 | .mount = ext4_mount, |
03010a33 TT |
5317 | .kill_sb = kill_block_super, |
5318 | .fs_flags = FS_REQUIRES_DEV, | |
5319 | }; | |
7f78e035 | 5320 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5321 | |
e9e3bcec ES |
5322 | /* Shared across all ext4 file systems */ |
5323 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5324 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5325 | ||
5dabfc78 | 5326 | static int __init ext4_init_fs(void) |
ac27a0ec | 5327 | { |
e9e3bcec | 5328 | int i, err; |
c9de560d | 5329 | |
e294a537 | 5330 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
5331 | ext4_li_info = NULL; |
5332 | mutex_init(&ext4_li_mtx); | |
5333 | ||
9a4c8019 | 5334 | /* Build-time check for flags consistency */ |
12e9b892 | 5335 | ext4_check_flag_values(); |
e9e3bcec ES |
5336 | |
5337 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5338 | mutex_init(&ext4__aio_mutex[i]); | |
5339 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5340 | } | |
5341 | ||
51865fda | 5342 | err = ext4_init_es(); |
6fd058f7 TT |
5343 | if (err) |
5344 | return err; | |
51865fda ZL |
5345 | |
5346 | err = ext4_init_pageio(); | |
5347 | if (err) | |
b5799018 | 5348 | goto out5; |
51865fda | 5349 | |
5dabfc78 | 5350 | err = ext4_init_system_zone(); |
bd2d0210 | 5351 | if (err) |
b5799018 | 5352 | goto out4; |
857ac889 | 5353 | |
b5799018 | 5354 | err = ext4_init_sysfs(); |
dd68314c | 5355 | if (err) |
b5799018 | 5356 | goto out3; |
857ac889 | 5357 | |
5dabfc78 | 5358 | err = ext4_init_mballoc(); |
c9de560d AT |
5359 | if (err) |
5360 | goto out2; | |
9c191f70 M |
5361 | else |
5362 | ext4_mballoc_ready = 1; | |
ac27a0ec DK |
5363 | err = init_inodecache(); |
5364 | if (err) | |
5365 | goto out1; | |
24b58424 | 5366 | register_as_ext3(); |
2035e776 | 5367 | register_as_ext2(); |
03010a33 | 5368 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5369 | if (err) |
5370 | goto out; | |
bfff6873 | 5371 | |
ac27a0ec DK |
5372 | return 0; |
5373 | out: | |
24b58424 TT |
5374 | unregister_as_ext2(); |
5375 | unregister_as_ext3(); | |
ac27a0ec DK |
5376 | destroy_inodecache(); |
5377 | out1: | |
9c191f70 | 5378 | ext4_mballoc_ready = 0; |
5dabfc78 | 5379 | ext4_exit_mballoc(); |
9c191f70 | 5380 | out2: |
b5799018 TT |
5381 | ext4_exit_sysfs(); |
5382 | out3: | |
5dabfc78 | 5383 | ext4_exit_system_zone(); |
b5799018 | 5384 | out4: |
5dabfc78 | 5385 | ext4_exit_pageio(); |
b5799018 | 5386 | out5: |
51865fda ZL |
5387 | ext4_exit_es(); |
5388 | ||
ac27a0ec DK |
5389 | return err; |
5390 | } | |
5391 | ||
5dabfc78 | 5392 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5393 | { |
e298e73b | 5394 | ext4_exit_crypto(); |
bfff6873 | 5395 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5396 | unregister_as_ext2(); |
5397 | unregister_as_ext3(); | |
03010a33 | 5398 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5399 | destroy_inodecache(); |
5dabfc78 | 5400 | ext4_exit_mballoc(); |
b5799018 | 5401 | ext4_exit_sysfs(); |
5dabfc78 TT |
5402 | ext4_exit_system_zone(); |
5403 | ext4_exit_pageio(); | |
dd12ed14 | 5404 | ext4_exit_es(); |
ac27a0ec DK |
5405 | } |
5406 | ||
5407 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5408 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5409 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5410 | module_init(ext4_init_fs) |
5411 | module_exit(ext4_exit_fs) |