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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 DK |
999 | 0, (SLAB_RECLAIM_ACCOUNT| |
1000 | SLAB_MEM_SPREAD), | |
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 |
af5bc92d | 1100 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1101 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
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, | |
ac27a0ec DK |
1134 | }; |
1135 | ||
0d54b217 | 1136 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1137 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1138 | .quota_off = ext4_quota_off, |
287a8095 | 1139 | .quota_sync = dquot_quota_sync, |
0a240339 | 1140 | .get_state = dquot_get_state, |
287a8095 CH |
1141 | .set_info = dquot_set_dqinfo, |
1142 | .get_dqblk = dquot_get_dqblk, | |
1143 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1144 | }; |
1145 | #endif | |
1146 | ||
ee9b6d61 | 1147 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1148 | .alloc_inode = ext4_alloc_inode, |
1149 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1150 | .write_inode = ext4_write_inode, |
1151 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1152 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1153 | .evict_inode = ext4_evict_inode, |
617ba13b | 1154 | .put_super = ext4_put_super, |
617ba13b | 1155 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1156 | .freeze_fs = ext4_freeze, |
1157 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1158 | .statfs = ext4_statfs, |
1159 | .remount_fs = ext4_remount, | |
617ba13b | 1160 | .show_options = ext4_show_options, |
ac27a0ec | 1161 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1162 | .quota_read = ext4_quota_read, |
1163 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1164 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1165 | #endif |
c39a7f84 | 1166 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1167 | }; |
1168 | ||
39655164 | 1169 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1170 | .fh_to_dentry = ext4_fh_to_dentry, |
1171 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1172 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1173 | }; |
1174 | ||
1175 | enum { | |
1176 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1177 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1178 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1179 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1180 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1181 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1182 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1183 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1184 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1185 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1186 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1187 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
923ae0ff | 1188 | Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, |
1449032b | 1189 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
a26f4992 | 1190 | Opt_lazytime, Opt_nolazytime, |
1449032b | 1191 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1192 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1193 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1194 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
c6d3d56d | 1195 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
ac27a0ec DK |
1196 | }; |
1197 | ||
a447c093 | 1198 | static const match_table_t tokens = { |
ac27a0ec DK |
1199 | {Opt_bsd_df, "bsddf"}, |
1200 | {Opt_minix_df, "minixdf"}, | |
1201 | {Opt_grpid, "grpid"}, | |
1202 | {Opt_grpid, "bsdgroups"}, | |
1203 | {Opt_nogrpid, "nogrpid"}, | |
1204 | {Opt_nogrpid, "sysvgroups"}, | |
1205 | {Opt_resgid, "resgid=%u"}, | |
1206 | {Opt_resuid, "resuid=%u"}, | |
1207 | {Opt_sb, "sb=%u"}, | |
1208 | {Opt_err_cont, "errors=continue"}, | |
1209 | {Opt_err_panic, "errors=panic"}, | |
1210 | {Opt_err_ro, "errors=remount-ro"}, | |
1211 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1212 | {Opt_debug, "debug"}, |
72578c33 TT |
1213 | {Opt_removed, "oldalloc"}, |
1214 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1215 | {Opt_user_xattr, "user_xattr"}, |
1216 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1217 | {Opt_acl, "acl"}, | |
1218 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1219 | {Opt_noload, "norecovery"}, |
5a916be1 | 1220 | {Opt_noload, "noload"}, |
72578c33 TT |
1221 | {Opt_removed, "nobh"}, |
1222 | {Opt_removed, "bh"}, | |
ac27a0ec | 1223 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1224 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1225 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1226 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1227 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1228 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1229 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1230 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1231 | {Opt_abort, "abort"}, |
1232 | {Opt_data_journal, "data=journal"}, | |
1233 | {Opt_data_ordered, "data=ordered"}, | |
1234 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1235 | {Opt_data_err_abort, "data_err=abort"}, |
1236 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1237 | {Opt_offusrjquota, "usrjquota="}, |
1238 | {Opt_usrjquota, "usrjquota=%s"}, | |
1239 | {Opt_offgrpjquota, "grpjquota="}, | |
1240 | {Opt_grpjquota, "grpjquota=%s"}, | |
1241 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1242 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1243 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1244 | {Opt_grpquota, "grpquota"}, |
1245 | {Opt_noquota, "noquota"}, | |
1246 | {Opt_quota, "quota"}, | |
1247 | {Opt_usrquota, "usrquota"}, | |
1248 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1249 | {Opt_barrier, "barrier"}, |
1250 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1251 | {Opt_i_version, "i_version"}, |
923ae0ff | 1252 | {Opt_dax, "dax"}, |
c9de560d | 1253 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1254 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1255 | {Opt_lazytime, "lazytime"}, |
1256 | {Opt_nolazytime, "nolazytime"}, | |
dd919b98 | 1257 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1258 | {Opt_removed, "mblk_io_submit"}, |
1259 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1260 | {Opt_block_validity, "block_validity"}, |
1261 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1262 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1263 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1264 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1265 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1266 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1267 | {Opt_dioread_nolock, "dioread_nolock"}, |
1268 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1269 | {Opt_discard, "discard"}, |
1270 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1271 | {Opt_init_itable, "init_itable=%u"}, |
1272 | {Opt_init_itable, "init_itable"}, | |
1273 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1274 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1275 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
c7198b9c TT |
1276 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1277 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1278 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1279 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1280 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1281 | {Opt_err, NULL}, |
ac27a0ec DK |
1282 | }; |
1283 | ||
617ba13b | 1284 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1285 | { |
617ba13b | 1286 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1287 | char *options = (char *) *data; |
1288 | ||
1289 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1290 | return 1; /* Default location */ | |
0b8e58a1 | 1291 | |
ac27a0ec | 1292 | options += 3; |
0b8e58a1 | 1293 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1294 | sb_block = simple_strtoul(options, &options, 0); |
1295 | if (*options && *options != ',') { | |
4776004f | 1296 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1297 | (char *) *data); |
1298 | return 1; | |
1299 | } | |
1300 | if (*options == ',') | |
1301 | options++; | |
1302 | *data = (void *) options; | |
0b8e58a1 | 1303 | |
ac27a0ec DK |
1304 | return sb_block; |
1305 | } | |
1306 | ||
b3881f74 | 1307 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1308 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1309 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1310 | |
56c50f11 DM |
1311 | #ifdef CONFIG_QUOTA |
1312 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1313 | { | |
1314 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1315 | char *qname; | |
03dafb5f | 1316 | int ret = -1; |
56c50f11 DM |
1317 | |
1318 | if (sb_any_quota_loaded(sb) && | |
1319 | !sbi->s_qf_names[qtype]) { | |
1320 | ext4_msg(sb, KERN_ERR, | |
1321 | "Cannot change journaled " | |
1322 | "quota options when quota turned on"); | |
57f73c2c | 1323 | return -1; |
56c50f11 | 1324 | } |
e2b911c5 | 1325 | if (ext4_has_feature_quota(sb)) { |
262b4662 JK |
1326 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " |
1327 | "when QUOTA feature is enabled"); | |
1328 | return -1; | |
1329 | } | |
56c50f11 DM |
1330 | qname = match_strdup(args); |
1331 | if (!qname) { | |
1332 | ext4_msg(sb, KERN_ERR, | |
1333 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1334 | return -1; |
56c50f11 | 1335 | } |
03dafb5f CG |
1336 | if (sbi->s_qf_names[qtype]) { |
1337 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1338 | ret = 1; | |
1339 | else | |
1340 | ext4_msg(sb, KERN_ERR, | |
1341 | "%s quota file already specified", | |
1342 | QTYPE2NAME(qtype)); | |
1343 | goto errout; | |
56c50f11 | 1344 | } |
03dafb5f | 1345 | if (strchr(qname, '/')) { |
56c50f11 DM |
1346 | ext4_msg(sb, KERN_ERR, |
1347 | "quotafile must be on filesystem root"); | |
03dafb5f | 1348 | goto errout; |
56c50f11 | 1349 | } |
03dafb5f | 1350 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1351 | set_opt(sb, QUOTA); |
56c50f11 | 1352 | return 1; |
03dafb5f CG |
1353 | errout: |
1354 | kfree(qname); | |
1355 | return ret; | |
56c50f11 DM |
1356 | } |
1357 | ||
1358 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1359 | { | |
1360 | ||
1361 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1362 | ||
1363 | if (sb_any_quota_loaded(sb) && | |
1364 | sbi->s_qf_names[qtype]) { | |
1365 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1366 | " when quota turned on"); | |
57f73c2c | 1367 | return -1; |
56c50f11 | 1368 | } |
03dafb5f | 1369 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1370 | sbi->s_qf_names[qtype] = NULL; |
1371 | return 1; | |
1372 | } | |
1373 | #endif | |
1374 | ||
26092bf5 TT |
1375 | #define MOPT_SET 0x0001 |
1376 | #define MOPT_CLEAR 0x0002 | |
1377 | #define MOPT_NOSUPPORT 0x0004 | |
1378 | #define MOPT_EXPLICIT 0x0008 | |
1379 | #define MOPT_CLEAR_ERR 0x0010 | |
1380 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1381 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1382 | #define MOPT_Q 0 |
1383 | #define MOPT_QFMT 0x0040 | |
1384 | #else | |
1385 | #define MOPT_Q MOPT_NOSUPPORT | |
1386 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1387 | #endif |
26092bf5 | 1388 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1389 | #define MOPT_NO_EXT2 0x0100 |
1390 | #define MOPT_NO_EXT3 0x0200 | |
1391 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1392 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1393 | |
1394 | static const struct mount_opts { | |
1395 | int token; | |
1396 | int mount_opt; | |
1397 | int flags; | |
1398 | } ext4_mount_opts[] = { | |
1399 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1400 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1401 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1402 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1403 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1404 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1405 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1406 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1407 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1408 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1409 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1410 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1411 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1412 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1413 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1414 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1415 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1416 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1417 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1418 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1419 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1420 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1421 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1422 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1423 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1424 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1425 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c TT |
1426 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
1427 | MOPT_NO_EXT2 | MOPT_SET}, | |
1428 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, | |
1429 | MOPT_NO_EXT2 | MOPT_CLEAR}, | |
26092bf5 TT |
1430 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1431 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1432 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1433 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1434 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1435 | {Opt_commit, 0, MOPT_GTE0}, | |
1436 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1437 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1438 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1439 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1440 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1441 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1442 | {Opt_resuid, 0, MOPT_GTE0}, |
1443 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1444 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1445 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1446 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1447 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1448 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1449 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1450 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1451 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1452 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1453 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1454 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1455 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1456 | #else |
26092bf5 TT |
1457 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1458 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1459 | #endif |
26092bf5 TT |
1460 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1461 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1462 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1463 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1464 | MOPT_SET | MOPT_Q}, | |
1465 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1466 | MOPT_SET | MOPT_Q}, | |
1467 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1468 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1469 | {Opt_usrjquota, 0, MOPT_Q}, | |
1470 | {Opt_grpjquota, 0, MOPT_Q}, | |
1471 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1472 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1473 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1474 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1475 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1476 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1477 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
26092bf5 TT |
1478 | {Opt_err, 0, 0} |
1479 | }; | |
1480 | ||
1481 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1482 | substring_t *args, unsigned long *journal_devnum, | |
1483 | unsigned int *journal_ioprio, int is_remount) | |
1484 | { | |
1485 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1486 | const struct mount_opts *m; | |
08cefc7a EB |
1487 | kuid_t uid; |
1488 | kgid_t gid; | |
26092bf5 TT |
1489 | int arg = 0; |
1490 | ||
57f73c2c TT |
1491 | #ifdef CONFIG_QUOTA |
1492 | if (token == Opt_usrjquota) | |
1493 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1494 | else if (token == Opt_grpjquota) | |
1495 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1496 | else if (token == Opt_offusrjquota) | |
1497 | return clear_qf_name(sb, USRQUOTA); | |
1498 | else if (token == Opt_offgrpjquota) | |
1499 | return clear_qf_name(sb, GRPQUOTA); | |
1500 | #endif | |
26092bf5 | 1501 | switch (token) { |
f7048605 TT |
1502 | case Opt_noacl: |
1503 | case Opt_nouser_xattr: | |
1504 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1505 | break; | |
26092bf5 TT |
1506 | case Opt_sb: |
1507 | return 1; /* handled by get_sb_block() */ | |
1508 | case Opt_removed: | |
5f3633e3 | 1509 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1510 | return 1; |
26092bf5 TT |
1511 | case Opt_abort: |
1512 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1513 | return 1; | |
1514 | case Opt_i_version: | |
1515 | sb->s_flags |= MS_I_VERSION; | |
1516 | return 1; | |
a26f4992 TT |
1517 | case Opt_lazytime: |
1518 | sb->s_flags |= MS_LAZYTIME; | |
1519 | return 1; | |
1520 | case Opt_nolazytime: | |
1521 | sb->s_flags &= ~MS_LAZYTIME; | |
1522 | return 1; | |
26092bf5 TT |
1523 | } |
1524 | ||
5f3633e3 JK |
1525 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1526 | if (token == m->token) | |
1527 | break; | |
1528 | ||
1529 | if (m->token == Opt_err) { | |
1530 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1531 | "or missing value", opt); | |
1532 | return -1; | |
1533 | } | |
1534 | ||
8dc0aa8c TT |
1535 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1536 | ext4_msg(sb, KERN_ERR, | |
1537 | "Mount option \"%s\" incompatible with ext2", opt); | |
1538 | return -1; | |
1539 | } | |
1540 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1541 | ext4_msg(sb, KERN_ERR, | |
1542 | "Mount option \"%s\" incompatible with ext3", opt); | |
1543 | return -1; | |
1544 | } | |
1545 | ||
ad4eec61 | 1546 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1547 | return -1; |
1548 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1549 | return -1; | |
c93cf2d7 DM |
1550 | if (m->flags & MOPT_EXPLICIT) { |
1551 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1552 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1553 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1554 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1555 | } else |
1556 | return -1; | |
1557 | } | |
5f3633e3 JK |
1558 | if (m->flags & MOPT_CLEAR_ERR) |
1559 | clear_opt(sb, ERRORS_MASK); | |
1560 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1561 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1562 | "options when quota turned on"); | |
1563 | return -1; | |
1564 | } | |
1565 | ||
1566 | if (m->flags & MOPT_NOSUPPORT) { | |
1567 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1568 | } else if (token == Opt_commit) { | |
1569 | if (arg == 0) | |
1570 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1571 | sbi->s_commit_interval = HZ * arg; | |
1572 | } else if (token == Opt_max_batch_time) { | |
5f3633e3 JK |
1573 | sbi->s_max_batch_time = arg; |
1574 | } else if (token == Opt_min_batch_time) { | |
1575 | sbi->s_min_batch_time = arg; | |
1576 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1577 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1578 | ext4_msg(sb, KERN_ERR, | |
1579 | "EXT4-fs: inode_readahead_blks must be " | |
1580 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1581 | return -1; |
5f3633e3 JK |
1582 | } |
1583 | sbi->s_inode_readahead_blks = arg; | |
1584 | } else if (token == Opt_init_itable) { | |
1585 | set_opt(sb, INIT_INODE_TABLE); | |
1586 | if (!args->from) | |
1587 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1588 | sbi->s_li_wait_mult = arg; | |
1589 | } else if (token == Opt_max_dir_size_kb) { | |
1590 | sbi->s_max_dir_size_kb = arg; | |
1591 | } else if (token == Opt_stripe) { | |
1592 | sbi->s_stripe = arg; | |
1593 | } else if (token == Opt_resuid) { | |
1594 | uid = make_kuid(current_user_ns(), arg); | |
1595 | if (!uid_valid(uid)) { | |
1596 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1597 | return -1; |
1598 | } | |
5f3633e3 JK |
1599 | sbi->s_resuid = uid; |
1600 | } else if (token == Opt_resgid) { | |
1601 | gid = make_kgid(current_user_ns(), arg); | |
1602 | if (!gid_valid(gid)) { | |
1603 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1604 | return -1; | |
1605 | } | |
1606 | sbi->s_resgid = gid; | |
1607 | } else if (token == Opt_journal_dev) { | |
1608 | if (is_remount) { | |
1609 | ext4_msg(sb, KERN_ERR, | |
1610 | "Cannot specify journal on remount"); | |
1611 | return -1; | |
1612 | } | |
1613 | *journal_devnum = arg; | |
ad4eec61 ES |
1614 | } else if (token == Opt_journal_path) { |
1615 | char *journal_path; | |
1616 | struct inode *journal_inode; | |
1617 | struct path path; | |
1618 | int error; | |
1619 | ||
1620 | if (is_remount) { | |
1621 | ext4_msg(sb, KERN_ERR, | |
1622 | "Cannot specify journal on remount"); | |
1623 | return -1; | |
1624 | } | |
1625 | journal_path = match_strdup(&args[0]); | |
1626 | if (!journal_path) { | |
1627 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1628 | "journal device string"); | |
1629 | return -1; | |
1630 | } | |
1631 | ||
1632 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1633 | if (error) { | |
1634 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1635 | "journal device path: error %d", error); | |
1636 | kfree(journal_path); | |
1637 | return -1; | |
1638 | } | |
1639 | ||
2b0143b5 | 1640 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1641 | if (!S_ISBLK(journal_inode->i_mode)) { |
1642 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1643 | "is not a block device", journal_path); | |
1644 | path_put(&path); | |
1645 | kfree(journal_path); | |
1646 | return -1; | |
1647 | } | |
1648 | ||
1649 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1650 | path_put(&path); | |
1651 | kfree(journal_path); | |
5f3633e3 JK |
1652 | } else if (token == Opt_journal_ioprio) { |
1653 | if (arg > 7) { | |
1654 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1655 | " (must be 0-7)"); | |
1656 | return -1; | |
1657 | } | |
1658 | *journal_ioprio = | |
1659 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1660 | } else if (token == Opt_test_dummy_encryption) { |
1661 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1662 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1663 | ext4_msg(sb, KERN_WARNING, | |
1664 | "Test dummy encryption mode enabled"); | |
1665 | #else | |
1666 | ext4_msg(sb, KERN_WARNING, | |
1667 | "Test dummy encryption mount option ignored"); | |
1668 | #endif | |
5f3633e3 JK |
1669 | } else if (m->flags & MOPT_DATAJ) { |
1670 | if (is_remount) { | |
1671 | if (!sbi->s_journal) | |
1672 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1673 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1674 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1675 | "Cannot change data mode on remount"); |
26092bf5 | 1676 | return -1; |
ac27a0ec | 1677 | } |
26092bf5 | 1678 | } else { |
5f3633e3 JK |
1679 | clear_opt(sb, DATA_FLAGS); |
1680 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1681 | } |
5f3633e3 JK |
1682 | #ifdef CONFIG_QUOTA |
1683 | } else if (m->flags & MOPT_QFMT) { | |
1684 | if (sb_any_quota_loaded(sb) && | |
1685 | sbi->s_jquota_fmt != m->mount_opt) { | |
1686 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1687 | "quota options when quota turned on"); | |
1688 | return -1; | |
1689 | } | |
e2b911c5 | 1690 | if (ext4_has_feature_quota(sb)) { |
262b4662 JK |
1691 | ext4_msg(sb, KERN_ERR, |
1692 | "Cannot set journaled quota options " | |
1693 | "when QUOTA feature is enabled"); | |
1694 | return -1; | |
1695 | } | |
5f3633e3 | 1696 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 1697 | #endif |
923ae0ff | 1698 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
1699 | #ifdef CONFIG_FS_DAX |
1700 | ext4_msg(sb, KERN_WARNING, | |
1701 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
1702 | sbi->s_mount_opt |= m->mount_opt; | |
1703 | #else | |
923ae0ff RZ |
1704 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
1705 | return -1; | |
5f3633e3 JK |
1706 | #endif |
1707 | } else { | |
1708 | if (!args->from) | |
1709 | arg = 1; | |
1710 | if (m->flags & MOPT_CLEAR) | |
1711 | arg = !arg; | |
1712 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1713 | ext4_msg(sb, KERN_WARNING, | |
1714 | "buggy handling of option %s", opt); | |
1715 | WARN_ON(1); | |
1716 | return -1; | |
1717 | } | |
1718 | if (arg != 0) | |
1719 | sbi->s_mount_opt |= m->mount_opt; | |
1720 | else | |
1721 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1722 | } |
5f3633e3 | 1723 | return 1; |
26092bf5 TT |
1724 | } |
1725 | ||
1726 | static int parse_options(char *options, struct super_block *sb, | |
1727 | unsigned long *journal_devnum, | |
1728 | unsigned int *journal_ioprio, | |
1729 | int is_remount) | |
1730 | { | |
1731 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1732 | char *p; | |
1733 | substring_t args[MAX_OPT_ARGS]; | |
1734 | int token; | |
1735 | ||
1736 | if (!options) | |
1737 | return 1; | |
1738 | ||
1739 | while ((p = strsep(&options, ",")) != NULL) { | |
1740 | if (!*p) | |
1741 | continue; | |
1742 | /* | |
1743 | * Initialize args struct so we know whether arg was | |
1744 | * found; some options take optional arguments. | |
1745 | */ | |
caecd0af | 1746 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1747 | token = match_token(p, tokens, args); |
1748 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1749 | journal_ioprio, is_remount) < 0) | |
1750 | return 0; | |
ac27a0ec DK |
1751 | } |
1752 | #ifdef CONFIG_QUOTA | |
e2b911c5 | 1753 | if (ext4_has_feature_quota(sb) && |
262b4662 JK |
1754 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { |
1755 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " | |
1756 | "feature is enabled"); | |
1757 | return 0; | |
1758 | } | |
ac27a0ec | 1759 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
482a7425 | 1760 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1761 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1762 | |
482a7425 | 1763 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1764 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1765 | |
56c50f11 | 1766 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1767 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1768 | "format mixing"); | |
ac27a0ec DK |
1769 | return 0; |
1770 | } | |
1771 | ||
1772 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1773 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1774 | "not specified"); | |
ac27a0ec DK |
1775 | return 0; |
1776 | } | |
ac27a0ec DK |
1777 | } |
1778 | #endif | |
261cb20c JK |
1779 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1780 | int blocksize = | |
1781 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1782 | ||
1783 | if (blocksize < PAGE_CACHE_SIZE) { | |
1784 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
1785 | "dioread_nolock if block size != PAGE_SIZE"); | |
1786 | return 0; | |
1787 | } | |
1788 | } | |
d4f76107 JK |
1789 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
1790 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
1791 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " | |
1792 | "in data=ordered mode"); | |
1793 | return 0; | |
1794 | } | |
ac27a0ec DK |
1795 | return 1; |
1796 | } | |
1797 | ||
2adf6da8 TT |
1798 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1799 | struct super_block *sb) | |
1800 | { | |
1801 | #if defined(CONFIG_QUOTA) | |
1802 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1803 | ||
1804 | if (sbi->s_jquota_fmt) { | |
1805 | char *fmtname = ""; | |
1806 | ||
1807 | switch (sbi->s_jquota_fmt) { | |
1808 | case QFMT_VFS_OLD: | |
1809 | fmtname = "vfsold"; | |
1810 | break; | |
1811 | case QFMT_VFS_V0: | |
1812 | fmtname = "vfsv0"; | |
1813 | break; | |
1814 | case QFMT_VFS_V1: | |
1815 | fmtname = "vfsv1"; | |
1816 | break; | |
1817 | } | |
1818 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1819 | } | |
1820 | ||
1821 | if (sbi->s_qf_names[USRQUOTA]) | |
a068acf2 | 1822 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
2adf6da8 TT |
1823 | |
1824 | if (sbi->s_qf_names[GRPQUOTA]) | |
a068acf2 | 1825 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
2adf6da8 TT |
1826 | #endif |
1827 | } | |
1828 | ||
5a916be1 TT |
1829 | static const char *token2str(int token) |
1830 | { | |
50df9fd5 | 1831 | const struct match_token *t; |
5a916be1 TT |
1832 | |
1833 | for (t = tokens; t->token != Opt_err; t++) | |
1834 | if (t->token == token && !strchr(t->pattern, '=')) | |
1835 | break; | |
1836 | return t->pattern; | |
1837 | } | |
1838 | ||
2adf6da8 TT |
1839 | /* |
1840 | * Show an option if | |
1841 | * - it's set to a non-default value OR | |
1842 | * - if the per-sb default is different from the global default | |
1843 | */ | |
66acdcf4 TT |
1844 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1845 | int nodefs) | |
2adf6da8 | 1846 | { |
2adf6da8 TT |
1847 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1848 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1849 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1850 | const struct mount_opts *m; |
66acdcf4 | 1851 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1852 | |
66acdcf4 TT |
1853 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1854 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1855 | |
1856 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1857 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1858 | ||
1859 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1860 | int want_set = m->flags & MOPT_SET; | |
1861 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1862 | (m->flags & MOPT_CLEAR_ERR)) | |
1863 | continue; | |
66acdcf4 | 1864 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1865 | continue; /* skip if same as the default */ |
1866 | if ((want_set && | |
1867 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1868 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1869 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1870 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1871 | } |
5a916be1 | 1872 | |
08cefc7a | 1873 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1874 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1875 | SEQ_OPTS_PRINT("resuid=%u", |
1876 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1877 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1878 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1879 | SEQ_OPTS_PRINT("resgid=%u", |
1880 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1881 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1882 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1883 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1884 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1885 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1886 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1887 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1888 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1889 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1890 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1891 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1892 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1893 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1894 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1895 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1896 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1897 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1898 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1899 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1900 | SEQ_OPTS_PUTS("data=journal"); | |
1901 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1902 | SEQ_OPTS_PUTS("data=ordered"); | |
1903 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1904 | SEQ_OPTS_PUTS("data=writeback"); | |
1905 | } | |
66acdcf4 TT |
1906 | if (nodefs || |
1907 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1908 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1909 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1910 | |
66acdcf4 TT |
1911 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1912 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1913 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1914 | if (nodefs || sbi->s_max_dir_size_kb) |
1915 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1916 | |
1917 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1918 | return 0; |
1919 | } | |
1920 | ||
66acdcf4 TT |
1921 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1922 | { | |
1923 | return _ext4_show_options(seq, root->d_sb, 0); | |
1924 | } | |
1925 | ||
ebd173be | 1926 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
1927 | { |
1928 | struct super_block *sb = seq->private; | |
1929 | int rc; | |
1930 | ||
1931 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1932 | rc = _ext4_show_options(seq, sb, 1); | |
1933 | seq_puts(seq, "\n"); | |
1934 | return rc; | |
1935 | } | |
1936 | ||
617ba13b | 1937 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1938 | int read_only) |
1939 | { | |
617ba13b | 1940 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1941 | int res = 0; |
1942 | ||
617ba13b | 1943 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1944 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1945 | "forcing read-only mode"); | |
ac27a0ec DK |
1946 | res = MS_RDONLY; |
1947 | } | |
1948 | if (read_only) | |
281b5995 | 1949 | goto done; |
617ba13b | 1950 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1951 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1952 | "running e2fsck is recommended"); | |
c8b459f4 | 1953 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
1954 | ext4_msg(sb, KERN_WARNING, |
1955 | "warning: mounting fs with errors, " | |
1956 | "running e2fsck is recommended"); | |
ed3ce80a | 1957 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1958 | le16_to_cpu(es->s_mnt_count) >= |
1959 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1960 | ext4_msg(sb, KERN_WARNING, |
1961 | "warning: maximal mount count reached, " | |
1962 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1963 | else if (le32_to_cpu(es->s_checkinterval) && |
1964 | (le32_to_cpu(es->s_lastcheck) + | |
1965 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1966 | ext4_msg(sb, KERN_WARNING, |
1967 | "warning: checktime reached, " | |
1968 | "running e2fsck is recommended"); | |
0b8e58a1 | 1969 | if (!sbi->s_journal) |
0390131b | 1970 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1971 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1972 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1973 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1974 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1975 | ext4_update_dynamic_rev(sb); |
0390131b | 1976 | if (sbi->s_journal) |
e2b911c5 | 1977 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 1978 | |
e2d67052 | 1979 | ext4_commit_super(sb, 1); |
281b5995 | 1980 | done: |
ac27a0ec | 1981 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1982 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1983 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1984 | sb->s_blocksize, |
1985 | sbi->s_groups_count, | |
617ba13b MC |
1986 | EXT4_BLOCKS_PER_GROUP(sb), |
1987 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1988 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1989 | |
7abc52c2 | 1990 | cleancache_init_fs(sb); |
ac27a0ec DK |
1991 | return res; |
1992 | } | |
1993 | ||
117fff10 TT |
1994 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1995 | { | |
1996 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1997 | struct flex_groups *new_groups; | |
1998 | int size; | |
1999 | ||
2000 | if (!sbi->s_log_groups_per_flex) | |
2001 | return 0; | |
2002 | ||
2003 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2004 | if (size <= sbi->s_flex_groups_allocated) | |
2005 | return 0; | |
2006 | ||
2007 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
2008 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
2009 | if (!new_groups) { | |
2010 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2011 | size / (int) sizeof(struct flex_groups)); | |
2012 | return -ENOMEM; | |
2013 | } | |
2014 | ||
2015 | if (sbi->s_flex_groups) { | |
2016 | memcpy(new_groups, sbi->s_flex_groups, | |
2017 | (sbi->s_flex_groups_allocated * | |
2018 | sizeof(struct flex_groups))); | |
b93b41d4 | 2019 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2020 | } |
2021 | sbi->s_flex_groups = new_groups; | |
2022 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2023 | return 0; | |
2024 | } | |
2025 | ||
772cb7c8 JS |
2026 | static int ext4_fill_flex_info(struct super_block *sb) |
2027 | { | |
2028 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2029 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2030 | ext4_group_t flex_group; |
117fff10 | 2031 | int i, err; |
772cb7c8 | 2032 | |
503358ae | 2033 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2034 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2035 | sbi->s_log_groups_per_flex = 0; |
2036 | return 1; | |
2037 | } | |
2038 | ||
117fff10 TT |
2039 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2040 | if (err) | |
9933fc0a | 2041 | goto failed; |
772cb7c8 | 2042 | |
772cb7c8 | 2043 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2044 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2045 | |
2046 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2047 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2048 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2049 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2050 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2051 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2052 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2053 | } |
2054 | ||
2055 | return 1; | |
2056 | failed: | |
2057 | return 0; | |
2058 | } | |
2059 | ||
e2b911c5 | 2060 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2061 | struct ext4_group_desc *gdp) |
717d50e4 | 2062 | { |
feb0ab32 | 2063 | int offset; |
717d50e4 | 2064 | __u16 crc = 0; |
feb0ab32 | 2065 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2066 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2067 | |
9aa5d32b | 2068 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2069 | /* Use new metadata_csum algorithm */ |
d6a77105 | 2070 | __le16 save_csum; |
feb0ab32 DW |
2071 | __u32 csum32; |
2072 | ||
d6a77105 | 2073 | save_csum = gdp->bg_checksum; |
feb0ab32 DW |
2074 | gdp->bg_checksum = 0; |
2075 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2076 | sizeof(le_group)); | |
2077 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2078 | sbi->s_desc_size); | |
d6a77105 | 2079 | gdp->bg_checksum = save_csum; |
feb0ab32 DW |
2080 | |
2081 | crc = csum32 & 0xFFFF; | |
2082 | goto out; | |
717d50e4 AD |
2083 | } |
2084 | ||
feb0ab32 | 2085 | /* old crc16 code */ |
e2b911c5 | 2086 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2087 | return 0; |
2088 | ||
feb0ab32 DW |
2089 | offset = offsetof(struct ext4_group_desc, bg_checksum); |
2090 | ||
2091 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2092 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2093 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2094 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2095 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2096 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2097 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2098 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2099 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2100 | offset); | |
2101 | ||
2102 | out: | |
717d50e4 AD |
2103 | return cpu_to_le16(crc); |
2104 | } | |
2105 | ||
feb0ab32 | 2106 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2107 | struct ext4_group_desc *gdp) |
2108 | { | |
feb0ab32 | 2109 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2110 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2111 | return 0; |
2112 | ||
2113 | return 1; | |
2114 | } | |
2115 | ||
feb0ab32 DW |
2116 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2117 | struct ext4_group_desc *gdp) | |
2118 | { | |
2119 | if (!ext4_has_group_desc_csum(sb)) | |
2120 | return; | |
e2b911c5 | 2121 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2122 | } |
2123 | ||
ac27a0ec | 2124 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2125 | static int ext4_check_descriptors(struct super_block *sb, |
2126 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2127 | { |
617ba13b MC |
2128 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2129 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2130 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2131 | ext4_fsblk_t block_bitmap; |
2132 | ext4_fsblk_t inode_bitmap; | |
2133 | ext4_fsblk_t inode_table; | |
ce421581 | 2134 | int flexbg_flag = 0; |
bfff6873 | 2135 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2136 | |
e2b911c5 | 2137 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2138 | flexbg_flag = 1; |
2139 | ||
af5bc92d | 2140 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2141 | |
197cd65a AM |
2142 | for (i = 0; i < sbi->s_groups_count; i++) { |
2143 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2144 | ||
ce421581 | 2145 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2146 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2147 | else |
2148 | last_block = first_block + | |
617ba13b | 2149 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2150 | |
bfff6873 LC |
2151 | if ((grp == sbi->s_groups_count) && |
2152 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2153 | grp = i; | |
2154 | ||
8fadc143 | 2155 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2156 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2157 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2158 | "Block bitmap for group %u not in group " |
b31e1552 | 2159 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2160 | return 0; |
2161 | } | |
8fadc143 | 2162 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2163 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2164 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2165 | "Inode bitmap for group %u not in group " |
b31e1552 | 2166 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2167 | return 0; |
2168 | } | |
8fadc143 | 2169 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2170 | if (inode_table < first_block || |
2b2d6d01 | 2171 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2172 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2173 | "Inode table for group %u not in group " |
b31e1552 | 2174 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2175 | return 0; |
2176 | } | |
955ce5f5 | 2177 | ext4_lock_group(sb, i); |
feb0ab32 | 2178 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2179 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2180 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2181 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2182 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
7ee1ec4c | 2183 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2184 | ext4_unlock_group(sb, i); |
8a266467 | 2185 | return 0; |
7ee1ec4c | 2186 | } |
717d50e4 | 2187 | } |
955ce5f5 | 2188 | ext4_unlock_group(sb, i); |
ce421581 JS |
2189 | if (!flexbg_flag) |
2190 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2191 | } |
bfff6873 LC |
2192 | if (NULL != first_not_zeroed) |
2193 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2194 | return 1; |
2195 | } | |
2196 | ||
617ba13b | 2197 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2198 | * the superblock) which were deleted from all directories, but held open by |
2199 | * a process at the time of a crash. We walk the list and try to delete these | |
2200 | * inodes at recovery time (only with a read-write filesystem). | |
2201 | * | |
2202 | * In order to keep the orphan inode chain consistent during traversal (in | |
2203 | * case of crash during recovery), we link each inode into the superblock | |
2204 | * orphan list_head and handle it the same way as an inode deletion during | |
2205 | * normal operation (which journals the operations for us). | |
2206 | * | |
2207 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2208 | * accidentally point at an in-use or already deleted inode. The worst that | |
2209 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2210 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2211 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2212 | * inode cleanup for us, so we can safely abort without any further action. | |
2213 | */ | |
2b2d6d01 TT |
2214 | static void ext4_orphan_cleanup(struct super_block *sb, |
2215 | struct ext4_super_block *es) | |
ac27a0ec DK |
2216 | { |
2217 | unsigned int s_flags = sb->s_flags; | |
2218 | int nr_orphans = 0, nr_truncates = 0; | |
2219 | #ifdef CONFIG_QUOTA | |
2220 | int i; | |
2221 | #endif | |
2222 | if (!es->s_last_orphan) { | |
2223 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2224 | return; | |
2225 | } | |
2226 | ||
a8f48a95 | 2227 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2228 | ext4_msg(sb, KERN_ERR, "write access " |
2229 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2230 | return; |
2231 | } | |
2232 | ||
d39195c3 AG |
2233 | /* Check if feature set would not allow a r/w mount */ |
2234 | if (!ext4_feature_set_ok(sb, 0)) { | |
2235 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2236 | "unknown ROCOMPAT features"); | |
2237 | return; | |
2238 | } | |
2239 | ||
617ba13b | 2240 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2241 | /* don't clear list on RO mount w/ errors */ |
2242 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2243 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2244 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2245 | es->s_last_orphan = 0; |
2246 | } | |
ac27a0ec DK |
2247 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2248 | return; | |
2249 | } | |
2250 | ||
2251 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2252 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2253 | sb->s_flags &= ~MS_RDONLY; |
2254 | } | |
2255 | #ifdef CONFIG_QUOTA | |
2256 | /* Needed for iput() to work correctly and not trash data */ | |
2257 | sb->s_flags |= MS_ACTIVE; | |
2258 | /* Turn on quotas so that they are updated correctly */ | |
a2d4a646 | 2259 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2260 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2261 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2262 | if (ret < 0) |
b31e1552 ES |
2263 | ext4_msg(sb, KERN_ERR, |
2264 | "Cannot turn on journaled " | |
2265 | "quota: error %d", ret); | |
ac27a0ec DK |
2266 | } |
2267 | } | |
2268 | #endif | |
2269 | ||
2270 | while (es->s_last_orphan) { | |
2271 | struct inode *inode; | |
2272 | ||
97bd42b9 JB |
2273 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2274 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2275 | es->s_last_orphan = 0; |
2276 | break; | |
2277 | } | |
2278 | ||
617ba13b | 2279 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2280 | dquot_initialize(inode); |
ac27a0ec | 2281 | if (inode->i_nlink) { |
566370a2 PT |
2282 | if (test_opt(sb, DEBUG)) |
2283 | ext4_msg(sb, KERN_DEBUG, | |
2284 | "%s: truncating inode %lu to %lld bytes", | |
2285 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2286 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2287 | inode->i_ino, inode->i_size); |
721e3eba | 2288 | mutex_lock(&inode->i_mutex); |
55f252c9 | 2289 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
617ba13b | 2290 | ext4_truncate(inode); |
721e3eba | 2291 | mutex_unlock(&inode->i_mutex); |
ac27a0ec DK |
2292 | nr_truncates++; |
2293 | } else { | |
566370a2 PT |
2294 | if (test_opt(sb, DEBUG)) |
2295 | ext4_msg(sb, KERN_DEBUG, | |
2296 | "%s: deleting unreferenced inode %lu", | |
2297 | __func__, inode->i_ino); | |
ac27a0ec DK |
2298 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2299 | inode->i_ino); | |
2300 | nr_orphans++; | |
2301 | } | |
2302 | iput(inode); /* The delete magic happens here! */ | |
2303 | } | |
2304 | ||
2b2d6d01 | 2305 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2306 | |
2307 | if (nr_orphans) | |
b31e1552 ES |
2308 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2309 | PLURAL(nr_orphans)); | |
ac27a0ec | 2310 | if (nr_truncates) |
b31e1552 ES |
2311 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2312 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2313 | #ifdef CONFIG_QUOTA |
2314 | /* Turn quotas off */ | |
a2d4a646 | 2315 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
ac27a0ec | 2316 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 2317 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2318 | } |
2319 | #endif | |
2320 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2321 | } | |
0b8e58a1 | 2322 | |
cd2291a4 ES |
2323 | /* |
2324 | * Maximal extent format file size. | |
2325 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2326 | * extent format containers, within a sector_t, and within i_blocks | |
2327 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2328 | * so that won't be a limiting factor. | |
2329 | * | |
f17722f9 LC |
2330 | * However there is other limiting factor. We do store extents in the form |
2331 | * of starting block and length, hence the resulting length of the extent | |
2332 | * covering maximum file size must fit into on-disk format containers as | |
2333 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2334 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2335 | * | |
cd2291a4 ES |
2336 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2337 | */ | |
f287a1a5 | 2338 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2339 | { |
2340 | loff_t res; | |
2341 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2342 | ||
2343 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2344 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2345 | /* |
90c699a9 | 2346 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2347 | * i_block represent total blocks in 512 bytes |
2348 | * 32 == size of vfs inode i_blocks * 8 | |
2349 | */ | |
2350 | upper_limit = (1LL << 32) - 1; | |
2351 | ||
2352 | /* total blocks in file system block size */ | |
2353 | upper_limit >>= (blkbits - 9); | |
2354 | upper_limit <<= blkbits; | |
2355 | } | |
2356 | ||
f17722f9 LC |
2357 | /* |
2358 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2359 | * by one fs block, so ee_len can cover the extent of maximum file | |
2360 | * size | |
2361 | */ | |
2362 | res = (1LL << 32) - 1; | |
cd2291a4 | 2363 | res <<= blkbits; |
cd2291a4 ES |
2364 | |
2365 | /* Sanity check against vm- & vfs- imposed limits */ | |
2366 | if (res > upper_limit) | |
2367 | res = upper_limit; | |
2368 | ||
2369 | return res; | |
2370 | } | |
ac27a0ec | 2371 | |
ac27a0ec | 2372 | /* |
cd2291a4 | 2373 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2374 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2375 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2376 | */ |
f287a1a5 | 2377 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2378 | { |
617ba13b | 2379 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2380 | int meta_blocks; |
2381 | loff_t upper_limit; | |
0b8e58a1 AD |
2382 | /* This is calculated to be the largest file size for a dense, block |
2383 | * mapped file such that the file's total number of 512-byte sectors, | |
2384 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2385 | * | |
2386 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2387 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2388 | */ |
2389 | ||
f287a1a5 | 2390 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2391 | /* |
90c699a9 | 2392 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2393 | * the inode i_block field represents total file blocks in |
2394 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2395 | */ |
2396 | upper_limit = (1LL << 32) - 1; | |
2397 | ||
2398 | /* total blocks in file system block size */ | |
2399 | upper_limit >>= (bits - 9); | |
2400 | ||
2401 | } else { | |
8180a562 AK |
2402 | /* |
2403 | * We use 48 bit ext4_inode i_blocks | |
2404 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2405 | * represent total number of blocks in | |
2406 | * file system block size | |
2407 | */ | |
0fc1b451 AK |
2408 | upper_limit = (1LL << 48) - 1; |
2409 | ||
0fc1b451 AK |
2410 | } |
2411 | ||
2412 | /* indirect blocks */ | |
2413 | meta_blocks = 1; | |
2414 | /* double indirect blocks */ | |
2415 | meta_blocks += 1 + (1LL << (bits-2)); | |
2416 | /* tripple indirect blocks */ | |
2417 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2418 | ||
2419 | upper_limit -= meta_blocks; | |
2420 | upper_limit <<= bits; | |
ac27a0ec DK |
2421 | |
2422 | res += 1LL << (bits-2); | |
2423 | res += 1LL << (2*(bits-2)); | |
2424 | res += 1LL << (3*(bits-2)); | |
2425 | res <<= bits; | |
2426 | if (res > upper_limit) | |
2427 | res = upper_limit; | |
0fc1b451 AK |
2428 | |
2429 | if (res > MAX_LFS_FILESIZE) | |
2430 | res = MAX_LFS_FILESIZE; | |
2431 | ||
ac27a0ec DK |
2432 | return res; |
2433 | } | |
2434 | ||
617ba13b | 2435 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2436 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2437 | { |
617ba13b | 2438 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2439 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2440 | int has_super = 0; |
2441 | ||
2442 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2443 | ||
e2b911c5 | 2444 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2445 | return logical_sb_block + nr + 1; |
ac27a0ec | 2446 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2447 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2448 | has_super = 1; |
0b8e58a1 | 2449 | |
bd63f6b0 DW |
2450 | /* |
2451 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2452 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2453 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2454 | * compensate. | |
2455 | */ | |
2456 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2457 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2458 | has_super++; | |
2459 | ||
617ba13b | 2460 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2461 | } |
2462 | ||
c9de560d AT |
2463 | /** |
2464 | * ext4_get_stripe_size: Get the stripe size. | |
2465 | * @sbi: In memory super block info | |
2466 | * | |
2467 | * If we have specified it via mount option, then | |
2468 | * use the mount option value. If the value specified at mount time is | |
2469 | * greater than the blocks per group use the super block value. | |
2470 | * If the super block value is greater than blocks per group return 0. | |
2471 | * Allocator needs it be less than blocks per group. | |
2472 | * | |
2473 | */ | |
2474 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2475 | { | |
2476 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2477 | unsigned long stripe_width = | |
2478 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2479 | int ret; |
c9de560d AT |
2480 | |
2481 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2482 | ret = sbi->s_stripe; |
2483 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2484 | ret = stripe_width; | |
2485 | else if (stride <= sbi->s_blocks_per_group) | |
2486 | ret = stride; | |
2487 | else | |
2488 | ret = 0; | |
c9de560d | 2489 | |
3eb08658 DE |
2490 | /* |
2491 | * If the stripe width is 1, this makes no sense and | |
2492 | * we set it to 0 to turn off stripe handling code. | |
2493 | */ | |
2494 | if (ret <= 1) | |
2495 | ret = 0; | |
c9de560d | 2496 | |
3eb08658 | 2497 | return ret; |
c9de560d | 2498 | } |
ac27a0ec | 2499 | |
a13fb1a4 ES |
2500 | /* |
2501 | * Check whether this filesystem can be mounted based on | |
2502 | * the features present and the RDONLY/RDWR mount requested. | |
2503 | * Returns 1 if this filesystem can be mounted as requested, | |
2504 | * 0 if it cannot be. | |
2505 | */ | |
2506 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2507 | { | |
e2b911c5 | 2508 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2509 | ext4_msg(sb, KERN_ERR, |
2510 | "Couldn't mount because of " | |
2511 | "unsupported optional features (%x)", | |
2512 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2513 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2514 | return 0; | |
2515 | } | |
2516 | ||
2517 | if (readonly) | |
2518 | return 1; | |
2519 | ||
e2b911c5 | 2520 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b DW |
2521 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
2522 | sb->s_flags |= MS_RDONLY; | |
2523 | return 1; | |
2524 | } | |
2525 | ||
a13fb1a4 | 2526 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2527 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2528 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2529 | "unsupported optional features (%x)", | |
2530 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2531 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2532 | return 0; | |
2533 | } | |
2534 | /* | |
2535 | * Large file size enabled file system can only be mounted | |
2536 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2537 | */ | |
e2b911c5 | 2538 | if (ext4_has_feature_huge_file(sb)) { |
a13fb1a4 ES |
2539 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
2540 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2541 | "cannot be mounted RDWR without " | |
2542 | "CONFIG_LBDAF"); | |
2543 | return 0; | |
2544 | } | |
2545 | } | |
e2b911c5 | 2546 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2547 | ext4_msg(sb, KERN_ERR, |
2548 | "Can't support bigalloc feature without " | |
2549 | "extents feature\n"); | |
2550 | return 0; | |
2551 | } | |
7c319d32 AK |
2552 | |
2553 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2554 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2555 | ext4_msg(sb, KERN_ERR, |
2556 | "Filesystem with quota feature cannot be mounted RDWR " | |
2557 | "without CONFIG_QUOTA"); | |
2558 | return 0; | |
2559 | } | |
2560 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2561 | return 1; |
2562 | } | |
2563 | ||
66e61a9e TT |
2564 | /* |
2565 | * This function is called once a day if we have errors logged | |
2566 | * on the file system | |
2567 | */ | |
2568 | static void print_daily_error_info(unsigned long arg) | |
2569 | { | |
2570 | struct super_block *sb = (struct super_block *) arg; | |
2571 | struct ext4_sb_info *sbi; | |
2572 | struct ext4_super_block *es; | |
2573 | ||
2574 | sbi = EXT4_SB(sb); | |
2575 | es = sbi->s_es; | |
2576 | ||
2577 | if (es->s_error_count) | |
ae0f78de TT |
2578 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2579 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2580 | le32_to_cpu(es->s_error_count)); |
2581 | if (es->s_first_error_time) { | |
ae0f78de | 2582 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2583 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2584 | (int) sizeof(es->s_first_error_func), | |
2585 | es->s_first_error_func, | |
2586 | le32_to_cpu(es->s_first_error_line)); | |
2587 | if (es->s_first_error_ino) | |
2588 | printk(": inode %u", | |
2589 | le32_to_cpu(es->s_first_error_ino)); | |
2590 | if (es->s_first_error_block) | |
2591 | printk(": block %llu", (unsigned long long) | |
2592 | le64_to_cpu(es->s_first_error_block)); | |
2593 | printk("\n"); | |
2594 | } | |
2595 | if (es->s_last_error_time) { | |
ae0f78de | 2596 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2597 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2598 | (int) sizeof(es->s_last_error_func), | |
2599 | es->s_last_error_func, | |
2600 | le32_to_cpu(es->s_last_error_line)); | |
2601 | if (es->s_last_error_ino) | |
2602 | printk(": inode %u", | |
2603 | le32_to_cpu(es->s_last_error_ino)); | |
2604 | if (es->s_last_error_block) | |
2605 | printk(": block %llu", (unsigned long long) | |
2606 | le64_to_cpu(es->s_last_error_block)); | |
2607 | printk("\n"); | |
2608 | } | |
2609 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2610 | } | |
2611 | ||
bfff6873 LC |
2612 | /* Find next suitable group and run ext4_init_inode_table */ |
2613 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2614 | { | |
2615 | struct ext4_group_desc *gdp = NULL; | |
2616 | ext4_group_t group, ngroups; | |
2617 | struct super_block *sb; | |
2618 | unsigned long timeout = 0; | |
2619 | int ret = 0; | |
2620 | ||
2621 | sb = elr->lr_super; | |
2622 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2623 | ||
8e8ad8a5 | 2624 | sb_start_write(sb); |
bfff6873 LC |
2625 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2626 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2627 | if (!gdp) { | |
2628 | ret = 1; | |
2629 | break; | |
2630 | } | |
2631 | ||
2632 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2633 | break; | |
2634 | } | |
2635 | ||
7f511862 | 2636 | if (group >= ngroups) |
bfff6873 LC |
2637 | ret = 1; |
2638 | ||
2639 | if (!ret) { | |
2640 | timeout = jiffies; | |
2641 | ret = ext4_init_inode_table(sb, group, | |
2642 | elr->lr_timeout ? 0 : 1); | |
2643 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2644 | timeout = (jiffies - timeout) * |
2645 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2646 | elr->lr_timeout = timeout; |
2647 | } | |
2648 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2649 | elr->lr_next_group = group + 1; | |
2650 | } | |
8e8ad8a5 | 2651 | sb_end_write(sb); |
bfff6873 LC |
2652 | |
2653 | return ret; | |
2654 | } | |
2655 | ||
2656 | /* | |
2657 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2658 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2659 | */ |
2660 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2661 | { | |
2662 | struct ext4_sb_info *sbi; | |
2663 | ||
2664 | if (!elr) | |
2665 | return; | |
2666 | ||
2667 | sbi = elr->lr_sbi; | |
2668 | ||
2669 | list_del(&elr->lr_request); | |
2670 | sbi->s_li_request = NULL; | |
2671 | kfree(elr); | |
2672 | } | |
2673 | ||
2674 | static void ext4_unregister_li_request(struct super_block *sb) | |
2675 | { | |
1bb933fb LC |
2676 | mutex_lock(&ext4_li_mtx); |
2677 | if (!ext4_li_info) { | |
2678 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2679 | return; |
1bb933fb | 2680 | } |
bfff6873 LC |
2681 | |
2682 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2683 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2684 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2685 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2686 | } |
2687 | ||
8f1f7453 ES |
2688 | static struct task_struct *ext4_lazyinit_task; |
2689 | ||
bfff6873 LC |
2690 | /* |
2691 | * This is the function where ext4lazyinit thread lives. It walks | |
2692 | * through the request list searching for next scheduled filesystem. | |
2693 | * When such a fs is found, run the lazy initialization request | |
2694 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2695 | * function. Based on that time we compute next schedule time of | |
2696 | * the request. When walking through the list is complete, compute | |
2697 | * next waking time and put itself into sleep. | |
2698 | */ | |
2699 | static int ext4_lazyinit_thread(void *arg) | |
2700 | { | |
2701 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2702 | struct list_head *pos, *n; | |
2703 | struct ext4_li_request *elr; | |
4ed5c033 | 2704 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2705 | |
2706 | BUG_ON(NULL == eli); | |
2707 | ||
bfff6873 LC |
2708 | cont_thread: |
2709 | while (true) { | |
2710 | next_wakeup = MAX_JIFFY_OFFSET; | |
2711 | ||
2712 | mutex_lock(&eli->li_list_mtx); | |
2713 | if (list_empty(&eli->li_request_list)) { | |
2714 | mutex_unlock(&eli->li_list_mtx); | |
2715 | goto exit_thread; | |
2716 | } | |
2717 | ||
2718 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2719 | elr = list_entry(pos, struct ext4_li_request, | |
2720 | lr_request); | |
2721 | ||
b2c78cd0 TT |
2722 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2723 | if (ext4_run_li_request(elr) != 0) { | |
2724 | /* error, remove the lazy_init job */ | |
2725 | ext4_remove_li_request(elr); | |
2726 | continue; | |
2727 | } | |
bfff6873 LC |
2728 | } |
2729 | ||
2730 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2731 | next_wakeup = elr->lr_next_sched; | |
2732 | } | |
2733 | mutex_unlock(&eli->li_list_mtx); | |
2734 | ||
a0acae0e | 2735 | try_to_freeze(); |
bfff6873 | 2736 | |
4ed5c033 LC |
2737 | cur = jiffies; |
2738 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2739 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2740 | cond_resched(); |
2741 | continue; | |
2742 | } | |
2743 | ||
4ed5c033 LC |
2744 | schedule_timeout_interruptible(next_wakeup - cur); |
2745 | ||
8f1f7453 ES |
2746 | if (kthread_should_stop()) { |
2747 | ext4_clear_request_list(); | |
2748 | goto exit_thread; | |
2749 | } | |
bfff6873 LC |
2750 | } |
2751 | ||
2752 | exit_thread: | |
2753 | /* | |
2754 | * It looks like the request list is empty, but we need | |
2755 | * to check it under the li_list_mtx lock, to prevent any | |
2756 | * additions into it, and of course we should lock ext4_li_mtx | |
2757 | * to atomically free the list and ext4_li_info, because at | |
2758 | * this point another ext4 filesystem could be registering | |
2759 | * new one. | |
2760 | */ | |
2761 | mutex_lock(&ext4_li_mtx); | |
2762 | mutex_lock(&eli->li_list_mtx); | |
2763 | if (!list_empty(&eli->li_request_list)) { | |
2764 | mutex_unlock(&eli->li_list_mtx); | |
2765 | mutex_unlock(&ext4_li_mtx); | |
2766 | goto cont_thread; | |
2767 | } | |
2768 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2769 | kfree(ext4_li_info); |
2770 | ext4_li_info = NULL; | |
2771 | mutex_unlock(&ext4_li_mtx); | |
2772 | ||
2773 | return 0; | |
2774 | } | |
2775 | ||
2776 | static void ext4_clear_request_list(void) | |
2777 | { | |
2778 | struct list_head *pos, *n; | |
2779 | struct ext4_li_request *elr; | |
2780 | ||
2781 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2782 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2783 | elr = list_entry(pos, struct ext4_li_request, | |
2784 | lr_request); | |
2785 | ext4_remove_li_request(elr); | |
2786 | } | |
2787 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2788 | } | |
2789 | ||
2790 | static int ext4_run_lazyinit_thread(void) | |
2791 | { | |
8f1f7453 ES |
2792 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2793 | ext4_li_info, "ext4lazyinit"); | |
2794 | if (IS_ERR(ext4_lazyinit_task)) { | |
2795 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2796 | ext4_clear_request_list(); |
bfff6873 LC |
2797 | kfree(ext4_li_info); |
2798 | ext4_li_info = NULL; | |
92b97816 | 2799 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2800 | "initialization thread\n", |
2801 | err); | |
2802 | return err; | |
2803 | } | |
2804 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2805 | return 0; |
2806 | } | |
2807 | ||
2808 | /* | |
2809 | * Check whether it make sense to run itable init. thread or not. | |
2810 | * If there is at least one uninitialized inode table, return | |
2811 | * corresponding group number, else the loop goes through all | |
2812 | * groups and return total number of groups. | |
2813 | */ | |
2814 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2815 | { | |
2816 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2817 | struct ext4_group_desc *gdp = NULL; | |
2818 | ||
2819 | for (group = 0; group < ngroups; group++) { | |
2820 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2821 | if (!gdp) | |
2822 | continue; | |
2823 | ||
2824 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2825 | break; | |
2826 | } | |
2827 | ||
2828 | return group; | |
2829 | } | |
2830 | ||
2831 | static int ext4_li_info_new(void) | |
2832 | { | |
2833 | struct ext4_lazy_init *eli = NULL; | |
2834 | ||
2835 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2836 | if (!eli) | |
2837 | return -ENOMEM; | |
2838 | ||
bfff6873 LC |
2839 | INIT_LIST_HEAD(&eli->li_request_list); |
2840 | mutex_init(&eli->li_list_mtx); | |
2841 | ||
bfff6873 LC |
2842 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2843 | ||
2844 | ext4_li_info = eli; | |
2845 | ||
2846 | return 0; | |
2847 | } | |
2848 | ||
2849 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2850 | ext4_group_t start) | |
2851 | { | |
2852 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2853 | struct ext4_li_request *elr; | |
bfff6873 LC |
2854 | |
2855 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2856 | if (!elr) | |
2857 | return NULL; | |
2858 | ||
2859 | elr->lr_super = sb; | |
2860 | elr->lr_sbi = sbi; | |
2861 | elr->lr_next_group = start; | |
2862 | ||
2863 | /* | |
2864 | * Randomize first schedule time of the request to | |
2865 | * spread the inode table initialization requests | |
2866 | * better. | |
2867 | */ | |
dd1f723b TT |
2868 | elr->lr_next_sched = jiffies + (prandom_u32() % |
2869 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
2870 | return elr; |
2871 | } | |
2872 | ||
7f511862 TT |
2873 | int ext4_register_li_request(struct super_block *sb, |
2874 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
2875 | { |
2876 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 2877 | struct ext4_li_request *elr = NULL; |
bfff6873 | 2878 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 2879 | int ret = 0; |
bfff6873 | 2880 | |
7f511862 | 2881 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
2882 | if (sbi->s_li_request != NULL) { |
2883 | /* | |
2884 | * Reset timeout so it can be computed again, because | |
2885 | * s_li_wait_mult might have changed. | |
2886 | */ | |
2887 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 2888 | goto out; |
51ce6511 | 2889 | } |
bfff6873 LC |
2890 | |
2891 | if (first_not_zeroed == ngroups || | |
2892 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 2893 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 2894 | goto out; |
bfff6873 LC |
2895 | |
2896 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
2897 | if (!elr) { |
2898 | ret = -ENOMEM; | |
2899 | goto out; | |
2900 | } | |
bfff6873 LC |
2901 | |
2902 | if (NULL == ext4_li_info) { | |
2903 | ret = ext4_li_info_new(); | |
2904 | if (ret) | |
2905 | goto out; | |
2906 | } | |
2907 | ||
2908 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2909 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2910 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2911 | ||
2912 | sbi->s_li_request = elr; | |
46e4690b TM |
2913 | /* |
2914 | * set elr to NULL here since it has been inserted to | |
2915 | * the request_list and the removal and free of it is | |
2916 | * handled by ext4_clear_request_list from now on. | |
2917 | */ | |
2918 | elr = NULL; | |
bfff6873 LC |
2919 | |
2920 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2921 | ret = ext4_run_lazyinit_thread(); | |
2922 | if (ret) | |
2923 | goto out; | |
2924 | } | |
bfff6873 | 2925 | out: |
beed5ecb NK |
2926 | mutex_unlock(&ext4_li_mtx); |
2927 | if (ret) | |
bfff6873 | 2928 | kfree(elr); |
bfff6873 LC |
2929 | return ret; |
2930 | } | |
2931 | ||
2932 | /* | |
2933 | * We do not need to lock anything since this is called on | |
2934 | * module unload. | |
2935 | */ | |
2936 | static void ext4_destroy_lazyinit_thread(void) | |
2937 | { | |
2938 | /* | |
2939 | * If thread exited earlier | |
2940 | * there's nothing to be done. | |
2941 | */ | |
8f1f7453 | 2942 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
2943 | return; |
2944 | ||
8f1f7453 | 2945 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
2946 | } |
2947 | ||
25ed6e8a DW |
2948 | static int set_journal_csum_feature_set(struct super_block *sb) |
2949 | { | |
2950 | int ret = 1; | |
2951 | int compat, incompat; | |
2952 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2953 | ||
9aa5d32b | 2954 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 2955 | /* journal checksum v3 */ |
25ed6e8a | 2956 | compat = 0; |
db9ee220 | 2957 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
2958 | } else { |
2959 | /* journal checksum v1 */ | |
2960 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
2961 | incompat = 0; | |
2962 | } | |
2963 | ||
feb8c6d3 DW |
2964 | jbd2_journal_clear_features(sbi->s_journal, |
2965 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2966 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
2967 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
2968 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2969 | ret = jbd2_journal_set_features(sbi->s_journal, | |
2970 | compat, 0, | |
2971 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
2972 | incompat); | |
2973 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2974 | ret = jbd2_journal_set_features(sbi->s_journal, | |
2975 | compat, 0, | |
2976 | incompat); | |
2977 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2978 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2979 | } else { | |
feb8c6d3 DW |
2980 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
2981 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
2982 | } |
2983 | ||
2984 | return ret; | |
2985 | } | |
2986 | ||
952fc18e TT |
2987 | /* |
2988 | * Note: calculating the overhead so we can be compatible with | |
2989 | * historical BSD practice is quite difficult in the face of | |
2990 | * clusters/bigalloc. This is because multiple metadata blocks from | |
2991 | * different block group can end up in the same allocation cluster. | |
2992 | * Calculating the exact overhead in the face of clustered allocation | |
2993 | * requires either O(all block bitmaps) in memory or O(number of block | |
2994 | * groups**2) in time. We will still calculate the superblock for | |
2995 | * older file systems --- and if we come across with a bigalloc file | |
2996 | * system with zero in s_overhead_clusters the estimate will be close to | |
2997 | * correct especially for very large cluster sizes --- but for newer | |
2998 | * file systems, it's better to calculate this figure once at mkfs | |
2999 | * time, and store it in the superblock. If the superblock value is | |
3000 | * present (even for non-bigalloc file systems), we will use it. | |
3001 | */ | |
3002 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3003 | char *buf) | |
3004 | { | |
3005 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3006 | struct ext4_group_desc *gdp; | |
3007 | ext4_fsblk_t first_block, last_block, b; | |
3008 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3009 | int s, j, count = 0; | |
3010 | ||
e2b911c5 | 3011 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3012 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3013 | sbi->s_itb_per_group + 2); | |
3014 | ||
952fc18e TT |
3015 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3016 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3017 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3018 | for (i = 0; i < ngroups; i++) { | |
3019 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3020 | b = ext4_block_bitmap(sb, gdp); | |
3021 | if (b >= first_block && b <= last_block) { | |
3022 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3023 | count++; | |
3024 | } | |
3025 | b = ext4_inode_bitmap(sb, gdp); | |
3026 | if (b >= first_block && b <= last_block) { | |
3027 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3028 | count++; | |
3029 | } | |
3030 | b = ext4_inode_table(sb, gdp); | |
3031 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3032 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3033 | int c = EXT4_B2C(sbi, b - first_block); | |
3034 | ext4_set_bit(c, buf); | |
3035 | count++; | |
3036 | } | |
3037 | if (i != grp) | |
3038 | continue; | |
3039 | s = 0; | |
3040 | if (ext4_bg_has_super(sb, grp)) { | |
3041 | ext4_set_bit(s++, buf); | |
3042 | count++; | |
3043 | } | |
3044 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3045 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3046 | count++; | |
3047 | } | |
3048 | } | |
3049 | if (!count) | |
3050 | return 0; | |
3051 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3052 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3053 | } | |
3054 | ||
3055 | /* | |
3056 | * Compute the overhead and stash it in sbi->s_overhead | |
3057 | */ | |
3058 | int ext4_calculate_overhead(struct super_block *sb) | |
3059 | { | |
3060 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3061 | struct ext4_super_block *es = sbi->s_es; | |
3062 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3063 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3064 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3065 | |
952fc18e TT |
3066 | if (!buf) |
3067 | return -ENOMEM; | |
3068 | ||
3069 | /* | |
3070 | * Compute the overhead (FS structures). This is constant | |
3071 | * for a given filesystem unless the number of block groups | |
3072 | * changes so we cache the previous value until it does. | |
3073 | */ | |
3074 | ||
3075 | /* | |
3076 | * All of the blocks before first_data_block are overhead | |
3077 | */ | |
3078 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3079 | ||
3080 | /* | |
3081 | * Add the overhead found in each block group | |
3082 | */ | |
3083 | for (i = 0; i < ngroups; i++) { | |
3084 | int blks; | |
3085 | ||
3086 | blks = count_overhead(sb, i, buf); | |
3087 | overhead += blks; | |
3088 | if (blks) | |
3089 | memset(buf, 0, PAGE_SIZE); | |
3090 | cond_resched(); | |
3091 | } | |
b003b524 ES |
3092 | /* Add the internal journal blocks as well */ |
3093 | if (sbi->s_journal && !sbi->journal_bdev) | |
810da240 | 3094 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3095 | |
952fc18e TT |
3096 | sbi->s_overhead = overhead; |
3097 | smp_wmb(); | |
3098 | free_page((unsigned long) buf); | |
3099 | return 0; | |
3100 | } | |
3101 | ||
b5799018 | 3102 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3103 | { |
3104 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3105 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3106 | |
30fac0f7 JK |
3107 | /* |
3108 | * There's no need to reserve anything when we aren't using extents. | |
3109 | * The space estimates are exact, there are no unwritten extents, | |
3110 | * hole punching doesn't need new metadata... This is needed especially | |
3111 | * to keep ext2/3 backward compatibility. | |
3112 | */ | |
e2b911c5 | 3113 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3114 | return; |
27dd4385 LC |
3115 | /* |
3116 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3117 | * This should cover the situations where we can not afford to run | |
3118 | * out of space like for example punch hole, or converting | |
556615dc | 3119 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3120 | * allocation would require 1, or 2 blocks, higher numbers are |
3121 | * very rare. | |
3122 | */ | |
b5799018 TT |
3123 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3124 | sbi->s_cluster_bits); | |
27dd4385 LC |
3125 | |
3126 | do_div(resv_clusters, 50); | |
3127 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3128 | ||
b5799018 | 3129 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3130 | } |
3131 | ||
2b2d6d01 | 3132 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3133 | { |
d4c402d9 | 3134 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3135 | struct buffer_head *bh; |
617ba13b MC |
3136 | struct ext4_super_block *es = NULL; |
3137 | struct ext4_sb_info *sbi; | |
3138 | ext4_fsblk_t block; | |
3139 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3140 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3141 | unsigned long offset = 0; |
ac27a0ec DK |
3142 | unsigned long journal_devnum = 0; |
3143 | unsigned long def_mount_opts; | |
3144 | struct inode *root; | |
0390131b | 3145 | const char *descr; |
dcc7dae3 | 3146 | int ret = -ENOMEM; |
281b5995 | 3147 | int blocksize, clustersize; |
4ec11028 TT |
3148 | unsigned int db_count; |
3149 | unsigned int i; | |
281b5995 | 3150 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3151 | __u64 blocks_count; |
07aa2ea1 | 3152 | int err = 0; |
b3881f74 | 3153 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3154 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3155 | |
3156 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3157 | if (!sbi) | |
dcc7dae3 | 3158 | goto out_free_orig; |
705895b6 PE |
3159 | |
3160 | sbi->s_blockgroup_lock = | |
3161 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3162 | if (!sbi->s_blockgroup_lock) { | |
3163 | kfree(sbi); | |
dcc7dae3 | 3164 | goto out_free_orig; |
705895b6 | 3165 | } |
ac27a0ec | 3166 | sb->s_fs_info = sbi; |
2c0544b2 | 3167 | sbi->s_sb = sb; |
240799cd | 3168 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3169 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3170 | if (sb->s_bdev->bd_part) |
3171 | sbi->s_sectors_written_start = | |
3172 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3173 | |
9f6200bb | 3174 | /* Cleanup superblock name */ |
ec3904dc | 3175 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3176 | |
07aa2ea1 | 3177 | /* -EINVAL is default */ |
dcc7dae3 | 3178 | ret = -EINVAL; |
617ba13b | 3179 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3180 | if (!blocksize) { |
b31e1552 | 3181 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3182 | goto out_fail; |
3183 | } | |
3184 | ||
3185 | /* | |
617ba13b | 3186 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3187 | * block sizes. We need to calculate the offset from buffer start. |
3188 | */ | |
617ba13b | 3189 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3190 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3191 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3192 | } else { |
70bbb3e0 | 3193 | logical_sb_block = sb_block; |
ac27a0ec DK |
3194 | } |
3195 | ||
a8ac900b | 3196 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3197 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3198 | goto out_fail; |
3199 | } | |
3200 | /* | |
3201 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3202 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3203 | */ |
2716b802 | 3204 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3205 | sbi->s_es = es; |
3206 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3207 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3208 | goto cantfind_ext4; | |
afc32f7e | 3209 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3210 | |
feb0ab32 | 3211 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3212 | if (ext4_has_feature_metadata_csum(sb) && |
3213 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3214 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3215 | "redundant flags; please run fsck."); |
3216 | ||
d25425f8 DW |
3217 | /* Check for a known checksum algorithm */ |
3218 | if (!ext4_verify_csum_type(sb, es)) { | |
3219 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3220 | "unknown checksum algorithm."); | |
3221 | silent = 1; | |
3222 | goto cantfind_ext4; | |
3223 | } | |
3224 | ||
0441984a | 3225 | /* Load the checksum driver */ |
e2b911c5 | 3226 | if (ext4_has_feature_metadata_csum(sb)) { |
0441984a DW |
3227 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3228 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3229 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3230 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3231 | sbi->s_chksum_driver = NULL; | |
3232 | goto failed_mount; | |
3233 | } | |
3234 | } | |
3235 | ||
a9c47317 DW |
3236 | /* Check superblock checksum */ |
3237 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3238 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3239 | "invalid superblock checksum. Run e2fsck?"); | |
3240 | silent = 1; | |
6a797d27 | 3241 | ret = -EFSBADCRC; |
a9c47317 DW |
3242 | goto cantfind_ext4; |
3243 | } | |
3244 | ||
3245 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3246 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f DW |
3247 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
3248 | else if (ext4_has_metadata_csum(sb)) | |
a9c47317 DW |
3249 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3250 | sizeof(es->s_uuid)); | |
3251 | ||
ac27a0ec DK |
3252 | /* Set defaults before we parse the mount options */ |
3253 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3254 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3255 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3256 | set_opt(sb, DEBUG); |
87f26807 | 3257 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3258 | set_opt(sb, GRPID); |
617ba13b | 3259 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3260 | set_opt(sb, NO_UID32); |
ea663336 | 3261 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3262 | set_opt(sb, XATTR_USER); |
03010a33 | 3263 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3264 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3265 | #endif |
98c1a759 DW |
3266 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3267 | if (ext4_has_metadata_csum(sb)) | |
3268 | set_opt(sb, JOURNAL_CHECKSUM); | |
3269 | ||
617ba13b | 3270 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3271 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3272 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3273 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3274 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3275 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3276 | |
3277 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3278 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3279 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3280 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3281 | else |
fd8c37ec | 3282 | set_opt(sb, ERRORS_RO); |
45f1a9c3 DW |
3283 | /* block_validity enabled by default; disable with noblock_validity */ |
3284 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3285 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3286 | set_opt(sb, DISCARD); |
ac27a0ec | 3287 | |
08cefc7a EB |
3288 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3289 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3290 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3291 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3292 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3293 | |
8b67f04a | 3294 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3295 | set_opt(sb, BARRIER); |
ac27a0ec | 3296 | |
dd919b98 AK |
3297 | /* |
3298 | * enable delayed allocation by default | |
3299 | * Use -o nodelalloc to turn it off | |
3300 | */ | |
bc0b75f7 | 3301 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3302 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3303 | set_opt(sb, DELALLOC); |
dd919b98 | 3304 | |
51ce6511 LC |
3305 | /* |
3306 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3307 | * no mount option specified. | |
3308 | */ | |
3309 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3310 | ||
8b67f04a | 3311 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3312 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3313 | ext4_msg(sb, KERN_WARNING, |
3314 | "failed to parse options in superblock: %s", | |
3315 | sbi->s_es->s_mount_opts); | |
3316 | } | |
5a916be1 | 3317 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3318 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3319 | &journal_ioprio, 0)) |
ac27a0ec DK |
3320 | goto failed_mount; |
3321 | ||
56889787 TT |
3322 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3323 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3324 | "with data=journal disables delayed " | |
3325 | "allocation and O_DIRECT support!\n"); | |
3326 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3327 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3328 | "both data=journal and delalloc"); | |
3329 | goto failed_mount; | |
3330 | } | |
3331 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3332 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3333 | "both data=journal and dioread_nolock"); |
56889787 TT |
3334 | goto failed_mount; |
3335 | } | |
923ae0ff RZ |
3336 | if (test_opt(sb, DAX)) { |
3337 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3338 | "both data=journal and dax"); | |
3339 | goto failed_mount; | |
3340 | } | |
56889787 TT |
3341 | if (test_opt(sb, DELALLOC)) |
3342 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3343 | } else { |
3344 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3345 | } |
3346 | ||
ac27a0ec | 3347 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3348 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3349 | |
617ba13b | 3350 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3351 | (ext4_has_compat_features(sb) || |
3352 | ext4_has_ro_compat_features(sb) || | |
3353 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3354 | ext4_msg(sb, KERN_WARNING, |
3355 | "feature flags set on rev 0 fs, " | |
3356 | "running e2fsck is recommended"); | |
469108ff | 3357 | |
ed3654eb TT |
3358 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3359 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3360 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3361 | ext4_msg(sb, KERN_ERR, |
3362 | "The Hurd can't support 64-bit file systems"); | |
3363 | goto failed_mount; | |
3364 | } | |
3365 | } | |
3366 | ||
2035e776 TT |
3367 | if (IS_EXT2_SB(sb)) { |
3368 | if (ext2_feature_set_ok(sb)) | |
3369 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3370 | "using the ext4 subsystem"); | |
3371 | else { | |
3372 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3373 | "to feature incompatibilities"); | |
3374 | goto failed_mount; | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | if (IS_EXT3_SB(sb)) { | |
3379 | if (ext3_feature_set_ok(sb)) | |
3380 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3381 | "using the ext4 subsystem"); | |
3382 | else { | |
3383 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3384 | "to feature incompatibilities"); | |
3385 | goto failed_mount; | |
3386 | } | |
3387 | } | |
3388 | ||
ac27a0ec DK |
3389 | /* |
3390 | * Check feature flags regardless of the revision level, since we | |
3391 | * previously didn't change the revision level when setting the flags, | |
3392 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3393 | */ | |
a13fb1a4 | 3394 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3395 | goto failed_mount; |
a13fb1a4 | 3396 | |
261cb20c | 3397 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3398 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3399 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3400 | ext4_msg(sb, KERN_ERR, |
3401 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3402 | goto failed_mount; |
3403 | } | |
3404 | ||
923ae0ff RZ |
3405 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
3406 | if (blocksize != PAGE_SIZE) { | |
3407 | ext4_msg(sb, KERN_ERR, | |
3408 | "error: unsupported blocksize for dax"); | |
3409 | goto failed_mount; | |
3410 | } | |
3411 | if (!sb->s_bdev->bd_disk->fops->direct_access) { | |
3412 | ext4_msg(sb, KERN_ERR, | |
3413 | "error: device does not support dax"); | |
3414 | goto failed_mount; | |
3415 | } | |
3416 | } | |
3417 | ||
e2b911c5 | 3418 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
3419 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
3420 | es->s_encryption_level); | |
3421 | goto failed_mount; | |
3422 | } | |
3423 | ||
ac27a0ec | 3424 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3425 | /* Validate the filesystem blocksize */ |
3426 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3427 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3428 | blocksize); |
ac27a0ec DK |
3429 | goto failed_mount; |
3430 | } | |
3431 | ||
2b2d6d01 | 3432 | brelse(bh); |
70bbb3e0 AM |
3433 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3434 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3435 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3436 | if (!bh) { |
b31e1552 ES |
3437 | ext4_msg(sb, KERN_ERR, |
3438 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3439 | goto failed_mount; |
3440 | } | |
2716b802 | 3441 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3442 | sbi->s_es = es; |
617ba13b | 3443 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3444 | ext4_msg(sb, KERN_ERR, |
3445 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3446 | goto failed_mount; |
3447 | } | |
3448 | } | |
3449 | ||
e2b911c5 | 3450 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
3451 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3452 | has_huge_files); | |
3453 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3454 | |
617ba13b MC |
3455 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3456 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3457 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3458 | } else { |
3459 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3460 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3461 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3462 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3463 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3464 | ext4_msg(sb, KERN_ERR, |
3465 | "unsupported inode size: %d", | |
2b2d6d01 | 3466 | sbi->s_inode_size); |
ac27a0ec DK |
3467 | goto failed_mount; |
3468 | } | |
ef7f3835 KS |
3469 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3470 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3471 | } |
0b8e58a1 | 3472 | |
0d1ee42f | 3473 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 3474 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 3475 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3476 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3477 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3478 | ext4_msg(sb, KERN_ERR, |
3479 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3480 | sbi->s_desc_size); |
3481 | goto failed_mount; | |
3482 | } | |
3483 | } else | |
3484 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3485 | |
ac27a0ec | 3486 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3487 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3488 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3489 | goto cantfind_ext4; |
0b8e58a1 | 3490 | |
617ba13b | 3491 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3492 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3493 | goto cantfind_ext4; |
ac27a0ec DK |
3494 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3495 | sbi->s_inodes_per_block; | |
0d1ee42f | 3496 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3497 | sbi->s_sbh = bh; |
3498 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3499 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3500 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3501 | |
2b2d6d01 | 3502 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3503 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3504 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 3505 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
3506 | i = le32_to_cpu(es->s_flags); |
3507 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3508 | sbi->s_hash_unsigned = 3; | |
3509 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3510 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3511 | if (!(sb->s_flags & MS_RDONLY)) |
3512 | es->s_flags |= | |
3513 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3514 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3515 | #else |
23301410 TT |
3516 | if (!(sb->s_flags & MS_RDONLY)) |
3517 | es->s_flags |= | |
3518 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3519 | #endif |
23301410 | 3520 | } |
f99b2589 | 3521 | } |
ac27a0ec | 3522 | |
281b5995 TT |
3523 | /* Handle clustersize */ |
3524 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 3525 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
3526 | if (has_bigalloc) { |
3527 | if (clustersize < blocksize) { | |
3528 | ext4_msg(sb, KERN_ERR, | |
3529 | "cluster size (%d) smaller than " | |
3530 | "block size (%d)", clustersize, blocksize); | |
3531 | goto failed_mount; | |
3532 | } | |
3533 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3534 | le32_to_cpu(es->s_log_block_size); | |
3535 | sbi->s_clusters_per_group = | |
3536 | le32_to_cpu(es->s_clusters_per_group); | |
3537 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3538 | ext4_msg(sb, KERN_ERR, | |
3539 | "#clusters per group too big: %lu", | |
3540 | sbi->s_clusters_per_group); | |
3541 | goto failed_mount; | |
3542 | } | |
3543 | if (sbi->s_blocks_per_group != | |
3544 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3545 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3546 | "clusters per group (%lu) inconsistent", | |
3547 | sbi->s_blocks_per_group, | |
3548 | sbi->s_clusters_per_group); | |
3549 | goto failed_mount; | |
3550 | } | |
3551 | } else { | |
3552 | if (clustersize != blocksize) { | |
3553 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3554 | "block size (%d)", clustersize, | |
3555 | blocksize); | |
3556 | clustersize = blocksize; | |
3557 | } | |
3558 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3559 | ext4_msg(sb, KERN_ERR, | |
3560 | "#blocks per group too big: %lu", | |
3561 | sbi->s_blocks_per_group); | |
3562 | goto failed_mount; | |
3563 | } | |
3564 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3565 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3566 | } |
281b5995 TT |
3567 | sbi->s_cluster_ratio = clustersize / blocksize; |
3568 | ||
ac27a0ec | 3569 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3570 | ext4_msg(sb, KERN_ERR, |
3571 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3572 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3573 | goto failed_mount; |
3574 | } | |
3575 | ||
960fd856 TT |
3576 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3577 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3578 | set_opt2(sb, STD_GROUP_SIZE); | |
3579 | ||
bf43d84b ES |
3580 | /* |
3581 | * Test whether we have more sectors than will fit in sector_t, | |
3582 | * and whether the max offset is addressable by the page cache. | |
3583 | */ | |
5a9ae68a | 3584 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3585 | ext4_blocks_count(es)); |
5a9ae68a | 3586 | if (err) { |
b31e1552 | 3587 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3588 | " too large to mount safely on this system"); |
ac27a0ec | 3589 | if (sizeof(sector_t) < 8) |
90c699a9 | 3590 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3591 | goto failed_mount; |
3592 | } | |
3593 | ||
617ba13b MC |
3594 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3595 | goto cantfind_ext4; | |
e7c95593 | 3596 | |
0f2ddca6 FTN |
3597 | /* check blocks count against device size */ |
3598 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3599 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3600 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3601 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3602 | ext4_blocks_count(es), blocks_count); |
3603 | goto failed_mount; | |
3604 | } | |
3605 | ||
0b8e58a1 AD |
3606 | /* |
3607 | * It makes no sense for the first data block to be beyond the end | |
3608 | * of the filesystem. | |
3609 | */ | |
3610 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3611 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3612 | "block %u is beyond end of filesystem (%llu)", |
3613 | le32_to_cpu(es->s_first_data_block), | |
3614 | ext4_blocks_count(es)); | |
e7c95593 ES |
3615 | goto failed_mount; |
3616 | } | |
bd81d8ee LV |
3617 | blocks_count = (ext4_blocks_count(es) - |
3618 | le32_to_cpu(es->s_first_data_block) + | |
3619 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3620 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3621 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3622 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3623 | "(block count %llu, first data block %u, " |
b31e1552 | 3624 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3625 | ext4_blocks_count(es), |
3626 | le32_to_cpu(es->s_first_data_block), | |
3627 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3628 | goto failed_mount; | |
3629 | } | |
bd81d8ee | 3630 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3631 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3632 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3633 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3634 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3635 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3636 | sizeof(struct buffer_head *), | |
3637 | GFP_KERNEL); | |
ac27a0ec | 3638 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3639 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3640 | ret = -ENOMEM; |
ac27a0ec DK |
3641 | goto failed_mount; |
3642 | } | |
3643 | ||
705895b6 | 3644 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3645 | |
3646 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3647 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 3648 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 3649 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
3650 | ext4_msg(sb, KERN_ERR, |
3651 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3652 | db_count = i; |
3653 | goto failed_mount2; | |
3654 | } | |
3655 | } | |
bfff6873 | 3656 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3657 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 3658 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 3659 | goto failed_mount2; |
ac27a0ec | 3660 | } |
772cb7c8 | 3661 | |
f9ae9cf5 | 3662 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
3663 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
3664 | spin_lock_init(&sbi->s_next_gen_lock); | |
3665 | ||
04ecddb7 JM |
3666 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
3667 | (unsigned long) sb); | |
04496411 | 3668 | |
a75ae78f | 3669 | /* Register extent status tree shrinker */ |
eb68d0e2 | 3670 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 3671 | goto failed_mount3; |
ce7e010a | 3672 | |
c9de560d | 3673 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3674 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3675 | |
f9ae9cf5 TT |
3676 | /* |
3677 | * set up enough so that it can read an inode | |
3678 | */ | |
f6e63f90 | 3679 | sb->s_op = &ext4_sops; |
617ba13b MC |
3680 | sb->s_export_op = &ext4_export_ops; |
3681 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3682 | #ifdef CONFIG_QUOTA |
617ba13b | 3683 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 3684 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 3685 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
3686 | else |
3687 | sb->s_qcop = &ext4_qctl_operations; | |
96c7e0d9 | 3688 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
ac27a0ec | 3689 | #endif |
f2fa2ffc AK |
3690 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3691 | ||
ac27a0ec | 3692 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3693 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3694 | |
3695 | sb->s_root = NULL; | |
3696 | ||
3697 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 3698 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 3699 | |
e2b911c5 | 3700 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
c5e06d10 | 3701 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 3702 | goto failed_mount3a; |
c5e06d10 | 3703 | |
ac27a0ec DK |
3704 | /* |
3705 | * The first inode we look at is the journal inode. Don't try | |
3706 | * root first: it may be modified in the journal! | |
3707 | */ | |
e2b911c5 | 3708 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
617ba13b | 3709 | if (ext4_load_journal(sb, es, journal_devnum)) |
50460fe8 | 3710 | goto failed_mount3a; |
0390131b | 3711 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
e2b911c5 | 3712 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
3713 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3714 | "suppressed and not mounted read-only"); | |
744692dc | 3715 | goto failed_mount_wq; |
ac27a0ec | 3716 | } else { |
1e381f60 DM |
3717 | /* Nojournal mode, all journal mount options are illegal */ |
3718 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
3719 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3720 | "journal_checksum, fs mounted w/o journal"); | |
3721 | goto failed_mount_wq; | |
3722 | } | |
3723 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3724 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3725 | "journal_async_commit, fs mounted w/o journal"); | |
3726 | goto failed_mount_wq; | |
3727 | } | |
3728 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
3729 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3730 | "commit=%lu, fs mounted w/o journal", | |
3731 | sbi->s_commit_interval / HZ); | |
3732 | goto failed_mount_wq; | |
3733 | } | |
3734 | if (EXT4_MOUNT_DATA_FLAGS & | |
3735 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
3736 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3737 | "data=, fs mounted w/o journal"); | |
3738 | goto failed_mount_wq; | |
3739 | } | |
3740 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
3741 | clear_opt(sb, JOURNAL_CHECKSUM); | |
fd8c37ec | 3742 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3743 | sbi->s_journal = NULL; |
3744 | needs_recovery = 0; | |
3745 | goto no_journal; | |
ac27a0ec DK |
3746 | } |
3747 | ||
e2b911c5 | 3748 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
3749 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3750 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3751 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3752 | goto failed_mount_wq; |
eb40a09c JS |
3753 | } |
3754 | ||
25ed6e8a DW |
3755 | if (!set_journal_csum_feature_set(sb)) { |
3756 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3757 | "feature set"); | |
3758 | goto failed_mount_wq; | |
d4da6c9c | 3759 | } |
818d276c | 3760 | |
ac27a0ec DK |
3761 | /* We have now updated the journal if required, so we can |
3762 | * validate the data journaling mode. */ | |
3763 | switch (test_opt(sb, DATA_FLAGS)) { | |
3764 | case 0: | |
3765 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3766 | * capabilities: ORDERED_DATA if the journal can |
3767 | * cope, else JOURNAL_DATA | |
3768 | */ | |
dab291af MC |
3769 | if (jbd2_journal_check_available_features |
3770 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3771 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3772 | else |
fd8c37ec | 3773 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3774 | break; |
3775 | ||
617ba13b MC |
3776 | case EXT4_MOUNT_ORDERED_DATA: |
3777 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3778 | if (!jbd2_journal_check_available_features |
3779 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3780 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3781 | "requested data journaling mode"); | |
744692dc | 3782 | goto failed_mount_wq; |
ac27a0ec DK |
3783 | } |
3784 | default: | |
3785 | break; | |
3786 | } | |
b3881f74 | 3787 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3788 | |
18aadd47 BJ |
3789 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3790 | ||
ce7e010a | 3791 | no_journal: |
9c191f70 M |
3792 | if (ext4_mballoc_ready) { |
3793 | sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); | |
3794 | if (!sbi->s_mb_cache) { | |
3795 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); | |
3796 | goto failed_mount_wq; | |
3797 | } | |
3798 | } | |
3799 | ||
e2b911c5 | 3800 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
1cb767cd TT |
3801 | (blocksize != PAGE_CACHE_SIZE)) { |
3802 | ext4_msg(sb, KERN_ERR, | |
3803 | "Unsupported blocksize for fs encryption"); | |
3804 | goto failed_mount_wq; | |
3805 | } | |
3806 | ||
e2b911c5 DW |
3807 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
3808 | !ext4_has_feature_encrypt(sb)) { | |
3809 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
3810 | ext4_commit_super(sb, 1); |
3811 | } | |
3812 | ||
952fc18e TT |
3813 | /* |
3814 | * Get the # of file system overhead blocks from the | |
3815 | * superblock if present. | |
3816 | */ | |
3817 | if (es->s_overhead_clusters) | |
3818 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3819 | else { | |
07aa2ea1 LC |
3820 | err = ext4_calculate_overhead(sb); |
3821 | if (err) | |
952fc18e TT |
3822 | goto failed_mount_wq; |
3823 | } | |
3824 | ||
fd89d5f2 TH |
3825 | /* |
3826 | * The maximum number of concurrent works can be high and | |
3827 | * concurrency isn't really necessary. Limit it to 1. | |
3828 | */ | |
2e8fa54e JK |
3829 | EXT4_SB(sb)->rsv_conversion_wq = |
3830 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
3831 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
3832 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 3833 | ret = -ENOMEM; |
2e8fa54e JK |
3834 | goto failed_mount4; |
3835 | } | |
3836 | ||
ac27a0ec | 3837 | /* |
dab291af | 3838 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3839 | * so we can safely mount the rest of the filesystem now. |
3840 | */ | |
3841 | ||
1d1fe1ee DH |
3842 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3843 | if (IS_ERR(root)) { | |
b31e1552 | 3844 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3845 | ret = PTR_ERR(root); |
32a9bb57 | 3846 | root = NULL; |
ac27a0ec DK |
3847 | goto failed_mount4; |
3848 | } | |
3849 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3850 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3851 | iput(root); |
ac27a0ec DK |
3852 | goto failed_mount4; |
3853 | } | |
48fde701 | 3854 | sb->s_root = d_make_root(root); |
1d1fe1ee | 3855 | if (!sb->s_root) { |
b31e1552 | 3856 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3857 | ret = -ENOMEM; |
3858 | goto failed_mount4; | |
3859 | } | |
ac27a0ec | 3860 | |
7e84b621 ES |
3861 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
3862 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
3863 | |
3864 | /* determine the minimum size of new large inodes, if present */ | |
3865 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3866 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3867 | EXT4_GOOD_OLD_INODE_SIZE; | |
e2b911c5 | 3868 | if (ext4_has_feature_extra_isize(sb)) { |
ef7f3835 KS |
3869 | if (sbi->s_want_extra_isize < |
3870 | le16_to_cpu(es->s_want_extra_isize)) | |
3871 | sbi->s_want_extra_isize = | |
3872 | le16_to_cpu(es->s_want_extra_isize); | |
3873 | if (sbi->s_want_extra_isize < | |
3874 | le16_to_cpu(es->s_min_extra_isize)) | |
3875 | sbi->s_want_extra_isize = | |
3876 | le16_to_cpu(es->s_min_extra_isize); | |
3877 | } | |
3878 | } | |
3879 | /* Check if enough inode space is available */ | |
3880 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3881 | sbi->s_inode_size) { | |
3882 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3883 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3884 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3885 | "available"); | |
ef7f3835 KS |
3886 | } |
3887 | ||
b5799018 | 3888 | ext4_set_resv_clusters(sb); |
27dd4385 | 3889 | |
6fd058f7 TT |
3890 | err = ext4_setup_system_zone(sb); |
3891 | if (err) { | |
b31e1552 | 3892 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3893 | "zone (%d)", err); |
f9ae9cf5 TT |
3894 | goto failed_mount4a; |
3895 | } | |
3896 | ||
3897 | ext4_ext_init(sb); | |
3898 | err = ext4_mb_init(sb); | |
3899 | if (err) { | |
3900 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
3901 | err); | |
dcf2d804 | 3902 | goto failed_mount5; |
c2774d84 AK |
3903 | } |
3904 | ||
d5e03cbb TT |
3905 | block = ext4_count_free_clusters(sb); |
3906 | ext4_free_blocks_count_set(sbi->s_es, | |
3907 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
3908 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
3909 | GFP_KERNEL); | |
d5e03cbb TT |
3910 | if (!err) { |
3911 | unsigned long freei = ext4_count_free_inodes(sb); | |
3912 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
3913 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
3914 | GFP_KERNEL); | |
d5e03cbb TT |
3915 | } |
3916 | if (!err) | |
3917 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 3918 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 3919 | if (!err) |
908c7f19 TH |
3920 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
3921 | GFP_KERNEL); | |
d5e03cbb TT |
3922 | if (err) { |
3923 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3924 | goto failed_mount6; | |
3925 | } | |
3926 | ||
e2b911c5 | 3927 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
3928 | if (!ext4_fill_flex_info(sb)) { |
3929 | ext4_msg(sb, KERN_ERR, | |
3930 | "unable to initialize " | |
3931 | "flex_bg meta info!"); | |
3932 | goto failed_mount6; | |
3933 | } | |
3934 | ||
bfff6873 LC |
3935 | err = ext4_register_li_request(sb, first_not_zeroed); |
3936 | if (err) | |
dcf2d804 | 3937 | goto failed_mount6; |
bfff6873 | 3938 | |
b5799018 | 3939 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
3940 | if (err) |
3941 | goto failed_mount7; | |
3197ebdb | 3942 | |
9b2ff357 JK |
3943 | #ifdef CONFIG_QUOTA |
3944 | /* Enable quota usage during mount. */ | |
e2b911c5 | 3945 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
9b2ff357 JK |
3946 | err = ext4_enable_quotas(sb); |
3947 | if (err) | |
3948 | goto failed_mount8; | |
3949 | } | |
3950 | #endif /* CONFIG_QUOTA */ | |
3951 | ||
617ba13b MC |
3952 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3953 | ext4_orphan_cleanup(sb, es); | |
3954 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3955 | if (needs_recovery) { |
b31e1552 | 3956 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3957 | ext4_mark_recovery_complete(sb, es); |
3958 | } | |
3959 | if (EXT4_SB(sb)->s_journal) { | |
3960 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3961 | descr = " journalled data mode"; | |
3962 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3963 | descr = " ordered data mode"; | |
3964 | else | |
3965 | descr = " writeback data mode"; | |
3966 | } else | |
3967 | descr = "out journal"; | |
3968 | ||
79add3a3 LC |
3969 | if (test_opt(sb, DISCARD)) { |
3970 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
3971 | if (!blk_queue_discard(q)) | |
3972 | ext4_msg(sb, KERN_WARNING, | |
3973 | "mounting with \"discard\" option, but " | |
3974 | "the device does not support discard"); | |
3975 | } | |
3976 | ||
e294a537 TT |
3977 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
3978 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
3979 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, | |
3980 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3981 | |
66e61a9e TT |
3982 | if (es->s_error_count) |
3983 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3984 | |
efbed4dc TT |
3985 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
3986 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
3987 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
3988 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
3989 | ||
d4c402d9 | 3990 | kfree(orig_data); |
ac27a0ec DK |
3991 | return 0; |
3992 | ||
617ba13b | 3993 | cantfind_ext4: |
ac27a0ec | 3994 | if (!silent) |
b31e1552 | 3995 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3996 | goto failed_mount; |
3997 | ||
72ba7450 TT |
3998 | #ifdef CONFIG_QUOTA |
3999 | failed_mount8: | |
ebd173be | 4000 | ext4_unregister_sysfs(sb); |
72ba7450 | 4001 | #endif |
dcf2d804 TM |
4002 | failed_mount7: |
4003 | ext4_unregister_li_request(sb); | |
4004 | failed_mount6: | |
f9ae9cf5 | 4005 | ext4_mb_release(sb); |
d5e03cbb | 4006 | if (sbi->s_flex_groups) |
b93b41d4 | 4007 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4008 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4009 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4010 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4011 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4012 | failed_mount5: |
f9ae9cf5 TT |
4013 | ext4_ext_release(sb); |
4014 | ext4_release_system_zone(sb); | |
4015 | failed_mount4a: | |
94bf608a | 4016 | dput(sb->s_root); |
32a9bb57 | 4017 | sb->s_root = NULL; |
94bf608a | 4018 | failed_mount4: |
b31e1552 | 4019 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4020 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4021 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4022 | failed_mount_wq: |
0390131b FM |
4023 | if (sbi->s_journal) { |
4024 | jbd2_journal_destroy(sbi->s_journal); | |
4025 | sbi->s_journal = NULL; | |
4026 | } | |
50460fe8 | 4027 | failed_mount3a: |
d3922a77 | 4028 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4029 | failed_mount3: |
9105bb14 | 4030 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4031 | if (sbi->s_mmp_tsk) |
4032 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4033 | failed_mount2: |
4034 | for (i = 0; i < db_count; i++) | |
4035 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4036 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4037 | failed_mount: |
0441984a DW |
4038 | if (sbi->s_chksum_driver) |
4039 | crypto_free_shash(sbi->s_chksum_driver); | |
ac27a0ec | 4040 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4041 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4042 | kfree(sbi->s_qf_names[i]); |
4043 | #endif | |
617ba13b | 4044 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4045 | brelse(bh); |
4046 | out_fail: | |
4047 | sb->s_fs_info = NULL; | |
f6830165 | 4048 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4049 | kfree(sbi); |
dcc7dae3 | 4050 | out_free_orig: |
d4c402d9 | 4051 | kfree(orig_data); |
07aa2ea1 | 4052 | return err ? err : ret; |
ac27a0ec DK |
4053 | } |
4054 | ||
4055 | /* | |
4056 | * Setup any per-fs journal parameters now. We'll do this both on | |
4057 | * initial mount, once the journal has been initialised but before we've | |
4058 | * done any recovery; and again on any subsequent remount. | |
4059 | */ | |
617ba13b | 4060 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4061 | { |
617ba13b | 4062 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4063 | |
30773840 TT |
4064 | journal->j_commit_interval = sbi->s_commit_interval; |
4065 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4066 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4067 | |
a931da6a | 4068 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4069 | if (test_opt(sb, BARRIER)) |
dab291af | 4070 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4071 | else |
dab291af | 4072 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4073 | if (test_opt(sb, DATA_ERR_ABORT)) |
4074 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4075 | else | |
4076 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4077 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4078 | } |
4079 | ||
617ba13b | 4080 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4081 | unsigned int journal_inum) |
4082 | { | |
4083 | struct inode *journal_inode; | |
4084 | journal_t *journal; | |
4085 | ||
e2b911c5 | 4086 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4087 | |
ac27a0ec DK |
4088 | /* First, test for the existence of a valid inode on disk. Bad |
4089 | * things happen if we iget() an unused inode, as the subsequent | |
4090 | * iput() will try to delete it. */ | |
4091 | ||
1d1fe1ee DH |
4092 | journal_inode = ext4_iget(sb, journal_inum); |
4093 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4094 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4095 | return NULL; |
4096 | } | |
4097 | if (!journal_inode->i_nlink) { | |
4098 | make_bad_inode(journal_inode); | |
4099 | iput(journal_inode); | |
b31e1552 | 4100 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4101 | return NULL; |
4102 | } | |
4103 | ||
e5f8eab8 | 4104 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4105 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4106 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4107 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4108 | iput(journal_inode); |
4109 | return NULL; | |
4110 | } | |
4111 | ||
dab291af | 4112 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4113 | if (!journal) { |
b31e1552 | 4114 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4115 | iput(journal_inode); |
4116 | return NULL; | |
4117 | } | |
4118 | journal->j_private = sb; | |
617ba13b | 4119 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4120 | return journal; |
4121 | } | |
4122 | ||
617ba13b | 4123 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4124 | dev_t j_dev) |
4125 | { | |
2b2d6d01 | 4126 | struct buffer_head *bh; |
ac27a0ec | 4127 | journal_t *journal; |
617ba13b MC |
4128 | ext4_fsblk_t start; |
4129 | ext4_fsblk_t len; | |
ac27a0ec | 4130 | int hblock, blocksize; |
617ba13b | 4131 | ext4_fsblk_t sb_block; |
ac27a0ec | 4132 | unsigned long offset; |
2b2d6d01 | 4133 | struct ext4_super_block *es; |
ac27a0ec DK |
4134 | struct block_device *bdev; |
4135 | ||
e2b911c5 | 4136 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4137 | |
b31e1552 | 4138 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4139 | if (bdev == NULL) |
4140 | return NULL; | |
4141 | ||
ac27a0ec | 4142 | blocksize = sb->s_blocksize; |
e1defc4f | 4143 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4144 | if (blocksize < hblock) { |
b31e1552 ES |
4145 | ext4_msg(sb, KERN_ERR, |
4146 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4147 | goto out_bdev; |
4148 | } | |
4149 | ||
617ba13b MC |
4150 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4151 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4152 | set_blocksize(bdev, blocksize); |
4153 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4154 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4155 | "external journal"); | |
ac27a0ec DK |
4156 | goto out_bdev; |
4157 | } | |
4158 | ||
2716b802 | 4159 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4160 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4161 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4162 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4163 | ext4_msg(sb, KERN_ERR, "external journal has " |
4164 | "bad superblock"); | |
ac27a0ec DK |
4165 | brelse(bh); |
4166 | goto out_bdev; | |
4167 | } | |
4168 | ||
df4763be DW |
4169 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4170 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4171 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4172 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4173 | "corrupt superblock"); | |
4174 | brelse(bh); | |
4175 | goto out_bdev; | |
4176 | } | |
4177 | ||
617ba13b | 4178 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4179 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4180 | brelse(bh); |
4181 | goto out_bdev; | |
4182 | } | |
4183 | ||
bd81d8ee | 4184 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4185 | start = sb_block + 1; |
4186 | brelse(bh); /* we're done with the superblock */ | |
4187 | ||
dab291af | 4188 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4189 | start, len, blocksize); |
4190 | if (!journal) { | |
b31e1552 | 4191 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4192 | goto out_bdev; |
4193 | } | |
4194 | journal->j_private = sb; | |
9f203507 | 4195 | ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4196 | wait_on_buffer(journal->j_sb_buffer); |
4197 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4198 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4199 | goto out_journal; |
4200 | } | |
4201 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4202 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4203 | "user (unsupported) - %d", | |
ac27a0ec DK |
4204 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4205 | goto out_journal; | |
4206 | } | |
617ba13b MC |
4207 | EXT4_SB(sb)->journal_bdev = bdev; |
4208 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4209 | return journal; |
0b8e58a1 | 4210 | |
ac27a0ec | 4211 | out_journal: |
dab291af | 4212 | jbd2_journal_destroy(journal); |
ac27a0ec | 4213 | out_bdev: |
617ba13b | 4214 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4215 | return NULL; |
4216 | } | |
4217 | ||
617ba13b MC |
4218 | static int ext4_load_journal(struct super_block *sb, |
4219 | struct ext4_super_block *es, | |
ac27a0ec DK |
4220 | unsigned long journal_devnum) |
4221 | { | |
4222 | journal_t *journal; | |
4223 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4224 | dev_t journal_dev; | |
4225 | int err = 0; | |
4226 | int really_read_only; | |
4227 | ||
e2b911c5 | 4228 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4229 | |
ac27a0ec DK |
4230 | if (journal_devnum && |
4231 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4232 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4233 | "numbers have changed"); | |
ac27a0ec DK |
4234 | journal_dev = new_decode_dev(journal_devnum); |
4235 | } else | |
4236 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4237 | ||
4238 | really_read_only = bdev_read_only(sb->s_bdev); | |
4239 | ||
4240 | /* | |
4241 | * Are we loading a blank journal or performing recovery after a | |
4242 | * crash? For recovery, we need to check in advance whether we | |
4243 | * can get read-write access to the device. | |
4244 | */ | |
e2b911c5 | 4245 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
ac27a0ec | 4246 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4247 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4248 | "required on readonly filesystem"); | |
ac27a0ec | 4249 | if (really_read_only) { |
b31e1552 ES |
4250 | ext4_msg(sb, KERN_ERR, "write access " |
4251 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4252 | return -EROFS; |
4253 | } | |
b31e1552 ES |
4254 | ext4_msg(sb, KERN_INFO, "write access will " |
4255 | "be enabled during recovery"); | |
ac27a0ec DK |
4256 | } |
4257 | } | |
4258 | ||
4259 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4260 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4261 | "and inode journals!"); | |
ac27a0ec DK |
4262 | return -EINVAL; |
4263 | } | |
4264 | ||
4265 | if (journal_inum) { | |
617ba13b | 4266 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4267 | return -EINVAL; |
4268 | } else { | |
617ba13b | 4269 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4270 | return -EINVAL; |
4271 | } | |
4272 | ||
90576c0b | 4273 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4274 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4275 | |
e2b911c5 | 4276 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4277 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4278 | if (!err) { |
4279 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4280 | if (save) | |
4281 | memcpy(save, ((char *) es) + | |
4282 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4283 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4284 | if (save) |
4285 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4286 | save, EXT4_S_ERR_LEN); | |
4287 | kfree(save); | |
4288 | } | |
ac27a0ec DK |
4289 | |
4290 | if (err) { | |
b31e1552 | 4291 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4292 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4293 | return err; |
4294 | } | |
4295 | ||
617ba13b MC |
4296 | EXT4_SB(sb)->s_journal = journal; |
4297 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4298 | |
c41303ce | 4299 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4300 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4301 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4302 | |
4303 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4304 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4305 | } |
4306 | ||
4307 | return 0; | |
4308 | } | |
4309 | ||
e2d67052 | 4310 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4311 | { |
e2d67052 | 4312 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4313 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4314 | int error = 0; |
ac27a0ec | 4315 | |
bdfe0cbd | 4316 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4317 | return error; |
914258bf TT |
4318 | if (buffer_write_io_error(sbh)) { |
4319 | /* | |
4320 | * Oh, dear. A previous attempt to write the | |
4321 | * superblock failed. This could happen because the | |
4322 | * USB device was yanked out. Or it could happen to | |
4323 | * be a transient write error and maybe the block will | |
4324 | * be remapped. Nothing we can do but to retry the | |
4325 | * write and hope for the best. | |
4326 | */ | |
b31e1552 ES |
4327 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4328 | "superblock detected"); | |
914258bf TT |
4329 | clear_buffer_write_io_error(sbh); |
4330 | set_buffer_uptodate(sbh); | |
4331 | } | |
71290b36 TT |
4332 | /* |
4333 | * If the file system is mounted read-only, don't update the | |
4334 | * superblock write time. This avoids updating the superblock | |
4335 | * write time when we are mounting the root file system | |
4336 | * read/only but we need to replay the journal; at that point, | |
4337 | * for people who are east of GMT and who make their clock | |
4338 | * tick in localtime for Windows bug-for-bug compatibility, | |
4339 | * the clock is set in the future, and this will cause e2fsck | |
4340 | * to complain and force a full file system check. | |
4341 | */ | |
4342 | if (!(sb->s_flags & MS_RDONLY)) | |
4343 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4344 | if (sb->s_bdev->bd_part) |
4345 | es->s_kbytes_written = | |
4346 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4347 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4348 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4349 | else |
4350 | es->s_kbytes_written = | |
4351 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4352 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4353 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4354 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4355 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4356 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4357 | es->s_free_inodes_count = | |
4358 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4359 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4360 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4361 | ext4_superblock_csum_set(sb); |
ac27a0ec | 4362 | mark_buffer_dirty(sbh); |
914258bf | 4363 | if (sync) { |
564bc402 DJ |
4364 | error = __sync_dirty_buffer(sbh, |
4365 | test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); | |
c4be0c1d TS |
4366 | if (error) |
4367 | return error; | |
4368 | ||
4369 | error = buffer_write_io_error(sbh); | |
4370 | if (error) { | |
b31e1552 ES |
4371 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4372 | "superblock"); | |
914258bf TT |
4373 | clear_buffer_write_io_error(sbh); |
4374 | set_buffer_uptodate(sbh); | |
4375 | } | |
4376 | } | |
c4be0c1d | 4377 | return error; |
ac27a0ec DK |
4378 | } |
4379 | ||
ac27a0ec DK |
4380 | /* |
4381 | * Have we just finished recovery? If so, and if we are mounting (or | |
4382 | * remounting) the filesystem readonly, then we will end up with a | |
4383 | * consistent fs on disk. Record that fact. | |
4384 | */ | |
2b2d6d01 TT |
4385 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4386 | struct ext4_super_block *es) | |
ac27a0ec | 4387 | { |
617ba13b | 4388 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4389 | |
e2b911c5 | 4390 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
4391 | BUG_ON(journal != NULL); |
4392 | return; | |
4393 | } | |
dab291af | 4394 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4395 | if (jbd2_journal_flush(journal) < 0) |
4396 | goto out; | |
4397 | ||
e2b911c5 | 4398 | if (ext4_has_feature_journal_needs_recovery(sb) && |
ac27a0ec | 4399 | sb->s_flags & MS_RDONLY) { |
e2b911c5 | 4400 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 4401 | ext4_commit_super(sb, 1); |
ac27a0ec | 4402 | } |
7ffe1ea8 HK |
4403 | |
4404 | out: | |
dab291af | 4405 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4406 | } |
4407 | ||
4408 | /* | |
4409 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4410 | * has recorded an error from a previous lifetime, move that error to the | |
4411 | * main filesystem now. | |
4412 | */ | |
2b2d6d01 TT |
4413 | static void ext4_clear_journal_err(struct super_block *sb, |
4414 | struct ext4_super_block *es) | |
ac27a0ec DK |
4415 | { |
4416 | journal_t *journal; | |
4417 | int j_errno; | |
4418 | const char *errstr; | |
4419 | ||
e2b911c5 | 4420 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4421 | |
617ba13b | 4422 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4423 | |
4424 | /* | |
4425 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4426 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4427 | */ |
4428 | ||
dab291af | 4429 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4430 | if (j_errno) { |
4431 | char nbuf[16]; | |
4432 | ||
617ba13b | 4433 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4434 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4435 | "from previous mount: %s", errstr); |
12062ddd | 4436 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4437 | |
617ba13b MC |
4438 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4439 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4440 | ext4_commit_super(sb, 1); |
ac27a0ec | 4441 | |
dab291af | 4442 | jbd2_journal_clear_err(journal); |
d796c52e | 4443 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4444 | } |
4445 | } | |
4446 | ||
4447 | /* | |
4448 | * Force the running and committing transactions to commit, | |
4449 | * and wait on the commit. | |
4450 | */ | |
617ba13b | 4451 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4452 | { |
4453 | journal_t *journal; | |
ac27a0ec DK |
4454 | |
4455 | if (sb->s_flags & MS_RDONLY) | |
4456 | return 0; | |
4457 | ||
617ba13b | 4458 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4459 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4460 | } |
4461 | ||
617ba13b | 4462 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4463 | { |
14ce0cb4 | 4464 | int ret = 0; |
9eddacf9 | 4465 | tid_t target; |
06a407f1 | 4466 | bool needs_barrier = false; |
8d5d02e6 | 4467 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4468 | |
9bffad1e | 4469 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4470 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4471 | /* |
4472 | * Writeback quota in non-journalled quota case - journalled quota has | |
4473 | * no dirty dquots | |
4474 | */ | |
4475 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4476 | /* |
4477 | * Data writeback is possible w/o journal transaction, so barrier must | |
4478 | * being sent at the end of the function. But we can skip it if | |
4479 | * transaction_commit will do it for us. | |
4480 | */ | |
bda32530 TT |
4481 | if (sbi->s_journal) { |
4482 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4483 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4484 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4485 | needs_barrier = true; | |
4486 | ||
4487 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4488 | if (wait) | |
4489 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4490 | target); | |
4491 | } | |
4492 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4493 | needs_barrier = true; |
06a407f1 DM |
4494 | if (needs_barrier) { |
4495 | int err; | |
4496 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4497 | if (!ret) | |
4498 | ret = err; | |
0390131b | 4499 | } |
06a407f1 DM |
4500 | |
4501 | return ret; | |
4502 | } | |
4503 | ||
ac27a0ec DK |
4504 | /* |
4505 | * LVM calls this function before a (read-only) snapshot is created. This | |
4506 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4507 | * |
4508 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4509 | * state independently. It relies on upper layer to stop all data & metadata |
4510 | * modifications. | |
ac27a0ec | 4511 | */ |
c4be0c1d | 4512 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4513 | { |
c4be0c1d TS |
4514 | int error = 0; |
4515 | journal_t *journal; | |
ac27a0ec | 4516 | |
9ca92389 TT |
4517 | if (sb->s_flags & MS_RDONLY) |
4518 | return 0; | |
ac27a0ec | 4519 | |
9ca92389 | 4520 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4521 | |
bb044576 TT |
4522 | if (journal) { |
4523 | /* Now we set up the journal barrier. */ | |
4524 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4525 | |
bb044576 TT |
4526 | /* |
4527 | * Don't clear the needs_recovery flag if we failed to | |
4528 | * flush the journal. | |
4529 | */ | |
4530 | error = jbd2_journal_flush(journal); | |
4531 | if (error < 0) | |
4532 | goto out; | |
c642dc9e ES |
4533 | |
4534 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 4535 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 4536 | } |
9ca92389 | 4537 | |
9ca92389 | 4538 | error = ext4_commit_super(sb, 1); |
6b0310fb | 4539 | out: |
bb044576 TT |
4540 | if (journal) |
4541 | /* we rely on upper layer to stop further updates */ | |
4542 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4543 | return error; |
ac27a0ec DK |
4544 | } |
4545 | ||
4546 | /* | |
4547 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4548 | * flag here, even though the filesystem is not technically dirty yet. | |
4549 | */ | |
c4be0c1d | 4550 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4551 | { |
9ca92389 TT |
4552 | if (sb->s_flags & MS_RDONLY) |
4553 | return 0; | |
4554 | ||
c642dc9e ES |
4555 | if (EXT4_SB(sb)->s_journal) { |
4556 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 4557 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
4558 | } |
4559 | ||
9ca92389 | 4560 | ext4_commit_super(sb, 1); |
c4be0c1d | 4561 | return 0; |
ac27a0ec DK |
4562 | } |
4563 | ||
673c6100 TT |
4564 | /* |
4565 | * Structure to save mount options for ext4_remount's benefit | |
4566 | */ | |
4567 | struct ext4_mount_options { | |
4568 | unsigned long s_mount_opt; | |
a2595b8a | 4569 | unsigned long s_mount_opt2; |
08cefc7a EB |
4570 | kuid_t s_resuid; |
4571 | kgid_t s_resgid; | |
673c6100 TT |
4572 | unsigned long s_commit_interval; |
4573 | u32 s_min_batch_time, s_max_batch_time; | |
4574 | #ifdef CONFIG_QUOTA | |
4575 | int s_jquota_fmt; | |
a2d4a646 | 4576 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4577 | #endif |
4578 | }; | |
4579 | ||
2b2d6d01 | 4580 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4581 | { |
2b2d6d01 | 4582 | struct ext4_super_block *es; |
617ba13b | 4583 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4584 | unsigned long old_sb_flags; |
617ba13b | 4585 | struct ext4_mount_options old_opts; |
c79d967d | 4586 | int enable_quota = 0; |
8a266467 | 4587 | ext4_group_t g; |
b3881f74 | 4588 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4589 | int err = 0; |
ac27a0ec | 4590 | #ifdef CONFIG_QUOTA |
03dafb5f | 4591 | int i, j; |
ac27a0ec | 4592 | #endif |
d4c402d9 | 4593 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4594 | |
4595 | /* Store the original options */ | |
4596 | old_sb_flags = sb->s_flags; | |
4597 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4598 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4599 | old_opts.s_resuid = sbi->s_resuid; |
4600 | old_opts.s_resgid = sbi->s_resgid; | |
4601 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4602 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4603 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4604 | #ifdef CONFIG_QUOTA |
4605 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 4606 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
4607 | if (sbi->s_qf_names[i]) { |
4608 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4609 | GFP_KERNEL); | |
4610 | if (!old_opts.s_qf_names[i]) { | |
4611 | for (j = 0; j < i; j++) | |
4612 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4613 | kfree(orig_data); |
03dafb5f CG |
4614 | return -ENOMEM; |
4615 | } | |
4616 | } else | |
4617 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4618 | #endif |
b3881f74 TT |
4619 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4620 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 4621 | |
661aa520 | 4622 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4623 | err = -EINVAL; |
4624 | goto restore_opts; | |
4625 | } | |
4626 | ||
6b992ff2 | 4627 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
4628 | test_opt(sb, JOURNAL_CHECKSUM)) { |
4629 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
4630 | "during remount not supported; ignoring"); |
4631 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
4632 | } |
4633 | ||
6ae6514b PS |
4634 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4635 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4636 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4637 | "both data=journal and delalloc"); | |
4638 | err = -EINVAL; | |
4639 | goto restore_opts; | |
4640 | } | |
4641 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4642 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4643 | "both data=journal and dioread_nolock"); | |
4644 | err = -EINVAL; | |
4645 | goto restore_opts; | |
4646 | } | |
923ae0ff RZ |
4647 | if (test_opt(sb, DAX)) { |
4648 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4649 | "both data=journal and dax"); | |
4650 | err = -EINVAL; | |
4651 | goto restore_opts; | |
4652 | } | |
4653 | } | |
4654 | ||
4655 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { | |
4656 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
4657 | "dax flag with busy inodes while remounting"); | |
4658 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
4659 | } |
4660 | ||
4ab2f15b | 4661 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4662 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4663 | |
4664 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4665 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4666 | |
4667 | es = sbi->s_es; | |
4668 | ||
b3881f74 | 4669 | if (sbi->s_journal) { |
0390131b | 4670 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4671 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4672 | } | |
ac27a0ec | 4673 | |
a2fd66d0 TT |
4674 | if (*flags & MS_LAZYTIME) |
4675 | sb->s_flags |= MS_LAZYTIME; | |
4676 | ||
661aa520 | 4677 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4678 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4679 | err = -EROFS; |
4680 | goto restore_opts; | |
4681 | } | |
4682 | ||
4683 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
4684 | err = sync_filesystem(sb); |
4685 | if (err < 0) | |
4686 | goto restore_opts; | |
0f0dd62f CH |
4687 | err = dquot_suspend(sb, -1); |
4688 | if (err < 0) | |
c79d967d | 4689 | goto restore_opts; |
c79d967d | 4690 | |
ac27a0ec DK |
4691 | /* |
4692 | * First of all, the unconditional stuff we have to do | |
4693 | * to disable replay of the journal when we next remount | |
4694 | */ | |
4695 | sb->s_flags |= MS_RDONLY; | |
4696 | ||
4697 | /* | |
4698 | * OK, test if we are remounting a valid rw partition | |
4699 | * readonly, and if so set the rdonly flag and then | |
4700 | * mark the partition as valid again. | |
4701 | */ | |
617ba13b MC |
4702 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4703 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4704 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4705 | ||
a63c9eb2 | 4706 | if (sbi->s_journal) |
0390131b | 4707 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4708 | } else { |
a13fb1a4 | 4709 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 4710 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 4711 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
4712 | err = -EROFS; |
4713 | goto restore_opts; | |
4714 | } | |
8a266467 TT |
4715 | /* |
4716 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4717 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4718 | */ |
4719 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4720 | struct ext4_group_desc *gdp = | |
4721 | ext4_get_group_desc(sb, g, NULL); | |
4722 | ||
feb0ab32 | 4723 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4724 | ext4_msg(sb, KERN_ERR, |
4725 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 4726 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 4727 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 4728 | err = -EFSBADCRC; |
8a266467 TT |
4729 | goto restore_opts; |
4730 | } | |
4731 | } | |
4732 | ||
ead6596b ES |
4733 | /* |
4734 | * If we have an unprocessed orphan list hanging | |
4735 | * around from a previously readonly bdev mount, | |
4736 | * require a full umount/remount for now. | |
4737 | */ | |
4738 | if (es->s_last_orphan) { | |
b31e1552 | 4739 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4740 | "remount RDWR because of unprocessed " |
4741 | "orphan inode list. Please " | |
b31e1552 | 4742 | "umount/remount instead"); |
ead6596b ES |
4743 | err = -EINVAL; |
4744 | goto restore_opts; | |
4745 | } | |
4746 | ||
ac27a0ec DK |
4747 | /* |
4748 | * Mounting a RDONLY partition read-write, so reread | |
4749 | * and store the current valid flag. (It may have | |
4750 | * been changed by e2fsck since we originally mounted | |
4751 | * the partition.) | |
4752 | */ | |
0390131b FM |
4753 | if (sbi->s_journal) |
4754 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4755 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4756 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4757 | sb->s_flags &= ~MS_RDONLY; |
e2b911c5 | 4758 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
4759 | if (ext4_multi_mount_protect(sb, |
4760 | le64_to_cpu(es->s_mmp_block))) { | |
4761 | err = -EROFS; | |
4762 | goto restore_opts; | |
4763 | } | |
c79d967d | 4764 | enable_quota = 1; |
ac27a0ec DK |
4765 | } |
4766 | } | |
bfff6873 LC |
4767 | |
4768 | /* | |
4769 | * Reinitialize lazy itable initialization thread based on | |
4770 | * current settings | |
4771 | */ | |
4772 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4773 | ext4_unregister_li_request(sb); | |
4774 | else { | |
4775 | ext4_group_t first_not_zeroed; | |
4776 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4777 | ext4_register_li_request(sb, first_not_zeroed); | |
4778 | } | |
4779 | ||
6fd058f7 | 4780 | ext4_setup_system_zone(sb); |
d096ad0f | 4781 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 4782 | ext4_commit_super(sb, 1); |
0390131b | 4783 | |
ac27a0ec DK |
4784 | #ifdef CONFIG_QUOTA |
4785 | /* Release old quota file names */ | |
a2d4a646 | 4786 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 4787 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
4788 | if (enable_quota) { |
4789 | if (sb_any_quota_suspended(sb)) | |
4790 | dquot_resume(sb, -1); | |
e2b911c5 | 4791 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 4792 | err = ext4_enable_quotas(sb); |
07724f98 | 4793 | if (err) |
7c319d32 | 4794 | goto restore_opts; |
7c319d32 AK |
4795 | } |
4796 | } | |
ac27a0ec | 4797 | #endif |
d4c402d9 | 4798 | |
a26f4992 | 4799 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
4800 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
4801 | kfree(orig_data); | |
ac27a0ec | 4802 | return 0; |
0b8e58a1 | 4803 | |
ac27a0ec DK |
4804 | restore_opts: |
4805 | sb->s_flags = old_sb_flags; | |
4806 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4807 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4808 | sbi->s_resuid = old_opts.s_resuid; |
4809 | sbi->s_resgid = old_opts.s_resgid; | |
4810 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4811 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4812 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4813 | #ifdef CONFIG_QUOTA |
4814 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 4815 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 4816 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
4817 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
4818 | } | |
4819 | #endif | |
d4c402d9 | 4820 | kfree(orig_data); |
ac27a0ec DK |
4821 | return err; |
4822 | } | |
4823 | ||
2b2d6d01 | 4824 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4825 | { |
4826 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4827 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4828 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 4829 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 4830 | u64 fsid; |
d02a9391 | 4831 | s64 bfree; |
27dd4385 | 4832 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 4833 | |
952fc18e TT |
4834 | if (!test_opt(sb, MINIX_DF)) |
4835 | overhead = sbi->s_overhead; | |
ac27a0ec | 4836 | |
617ba13b | 4837 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4838 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 4839 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
4840 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4841 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4842 | /* prevent underflow in case that few free space is available */ |
57042651 | 4843 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
4844 | buf->f_bavail = buf->f_bfree - |
4845 | (ext4_r_blocks_count(es) + resv_blocks); | |
4846 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
4847 | buf->f_bavail = 0; |
4848 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4849 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4850 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4851 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4852 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4853 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4854 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4855 | |
ac27a0ec DK |
4856 | return 0; |
4857 | } | |
4858 | ||
0b8e58a1 AD |
4859 | /* Helper function for writing quotas on sync - we need to start transaction |
4860 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4861 | * Process 1 Process 2 |
617ba13b | 4862 | * ext4_create() quota_sync() |
a269eb18 | 4863 | * jbd2_journal_start() write_dquot() |
871a2931 | 4864 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4865 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4866 | * |
4867 | */ | |
4868 | ||
4869 | #ifdef CONFIG_QUOTA | |
4870 | ||
4871 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4872 | { | |
4c376dca | 4873 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
4874 | } |
4875 | ||
617ba13b | 4876 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4877 | { |
4878 | int ret, err; | |
4879 | handle_t *handle; | |
4880 | struct inode *inode; | |
4881 | ||
4882 | inode = dquot_to_inode(dquot); | |
9924a92a | 4883 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 4884 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4885 | if (IS_ERR(handle)) |
4886 | return PTR_ERR(handle); | |
4887 | ret = dquot_commit(dquot); | |
617ba13b | 4888 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4889 | if (!ret) |
4890 | ret = err; | |
4891 | return ret; | |
4892 | } | |
4893 | ||
617ba13b | 4894 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4895 | { |
4896 | int ret, err; | |
4897 | handle_t *handle; | |
4898 | ||
9924a92a | 4899 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4900 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4901 | if (IS_ERR(handle)) |
4902 | return PTR_ERR(handle); | |
4903 | ret = dquot_acquire(dquot); | |
617ba13b | 4904 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4905 | if (!ret) |
4906 | ret = err; | |
4907 | return ret; | |
4908 | } | |
4909 | ||
617ba13b | 4910 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4911 | { |
4912 | int ret, err; | |
4913 | handle_t *handle; | |
4914 | ||
9924a92a | 4915 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4916 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4917 | if (IS_ERR(handle)) { |
4918 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4919 | dquot_release(dquot); | |
ac27a0ec | 4920 | return PTR_ERR(handle); |
9c3013e9 | 4921 | } |
ac27a0ec | 4922 | ret = dquot_release(dquot); |
617ba13b | 4923 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4924 | if (!ret) |
4925 | ret = err; | |
4926 | return ret; | |
4927 | } | |
4928 | ||
617ba13b | 4929 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4930 | { |
262b4662 JK |
4931 | struct super_block *sb = dquot->dq_sb; |
4932 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4933 | ||
2c8be6b2 | 4934 | /* Are we journaling quotas? */ |
e2b911c5 | 4935 | if (ext4_has_feature_quota(sb) || |
262b4662 | 4936 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 4937 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4938 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4939 | } else { |
4940 | return dquot_mark_dquot_dirty(dquot); | |
4941 | } | |
4942 | } | |
4943 | ||
617ba13b | 4944 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4945 | { |
4946 | int ret, err; | |
4947 | handle_t *handle; | |
4948 | ||
4949 | /* Data block + inode block */ | |
2b0143b5 | 4950 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
4951 | if (IS_ERR(handle)) |
4952 | return PTR_ERR(handle); | |
4953 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4954 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4955 | if (!ret) |
4956 | ret = err; | |
4957 | return ret; | |
4958 | } | |
4959 | ||
4960 | /* | |
4961 | * Turn on quotas during mount time - we need to find | |
4962 | * the quota file and such... | |
4963 | */ | |
617ba13b | 4964 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4965 | { |
287a8095 CH |
4966 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4967 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4968 | } |
4969 | ||
4970 | /* | |
4971 | * Standard function to be called on quota_on | |
4972 | */ | |
617ba13b | 4973 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4974 | struct path *path) |
ac27a0ec DK |
4975 | { |
4976 | int err; | |
ac27a0ec DK |
4977 | |
4978 | if (!test_opt(sb, QUOTA)) | |
4979 | return -EINVAL; | |
0623543b | 4980 | |
ac27a0ec | 4981 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 4982 | if (path->dentry->d_sb != sb) |
ac27a0ec | 4983 | return -EXDEV; |
0623543b JK |
4984 | /* Journaling quota? */ |
4985 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4986 | /* Quotafile not in fs root? */ |
f00c9e44 | 4987 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4988 | ext4_msg(sb, KERN_WARNING, |
4989 | "Quota file not on filesystem root. " | |
4990 | "Journaled quota will not work"); | |
2b2d6d01 | 4991 | } |
0623543b JK |
4992 | |
4993 | /* | |
4994 | * When we journal data on quota file, we have to flush journal to see | |
4995 | * all updates to the file when we bypass pagecache... | |
4996 | */ | |
0390131b | 4997 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 4998 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
4999 | /* |
5000 | * We don't need to lock updates but journal_flush() could | |
5001 | * otherwise be livelocked... | |
5002 | */ | |
5003 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5004 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5005 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5006 | if (err) |
7ffe1ea8 | 5007 | return err; |
0623543b JK |
5008 | } |
5009 | ||
f00c9e44 | 5010 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
5011 | } |
5012 | ||
7c319d32 AK |
5013 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5014 | unsigned int flags) | |
5015 | { | |
5016 | int err; | |
5017 | struct inode *qf_inode; | |
a2d4a646 | 5018 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 AK |
5019 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
5020 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5021 | }; | |
5022 | ||
e2b911c5 | 5023 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5024 | |
5025 | if (!qf_inums[type]) | |
5026 | return -EPERM; | |
5027 | ||
5028 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5029 | if (IS_ERR(qf_inode)) { | |
5030 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5031 | return PTR_ERR(qf_inode); | |
5032 | } | |
5033 | ||
bcb13850 JK |
5034 | /* Don't account quota for quota files to avoid recursion */ |
5035 | qf_inode->i_flags |= S_NOQUOTA; | |
7c319d32 AK |
5036 | err = dquot_enable(qf_inode, type, format_id, flags); |
5037 | iput(qf_inode); | |
5038 | ||
5039 | return err; | |
5040 | } | |
5041 | ||
5042 | /* Enable usage tracking for all quota types. */ | |
5043 | static int ext4_enable_quotas(struct super_block *sb) | |
5044 | { | |
5045 | int type, err = 0; | |
a2d4a646 | 5046 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 AK |
5047 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
5048 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5049 | }; | |
5050 | ||
5051 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5052 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5053 | if (qf_inums[type]) { |
5054 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5055 | DQUOT_USAGE_ENABLED); | |
5056 | if (err) { | |
5057 | ext4_warning(sb, | |
72ba7450 TT |
5058 | "Failed to enable quota tracking " |
5059 | "(type=%d, err=%d). Please run " | |
5060 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5061 | return err; |
5062 | } | |
5063 | } | |
5064 | } | |
5065 | return 0; | |
5066 | } | |
5067 | ||
ca0e05e4 DM |
5068 | static int ext4_quota_off(struct super_block *sb, int type) |
5069 | { | |
21f97697 JK |
5070 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5071 | handle_t *handle; | |
5072 | ||
87009d86 DM |
5073 | /* Force all delayed allocation blocks to be allocated. |
5074 | * Caller already holds s_umount sem */ | |
5075 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5076 | sync_filesystem(sb); |
ca0e05e4 | 5077 | |
0b268590 AG |
5078 | if (!inode) |
5079 | goto out; | |
5080 | ||
21f97697 JK |
5081 | /* Update modification times of quota files when userspace can |
5082 | * start looking at them */ | |
9924a92a | 5083 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5084 | if (IS_ERR(handle)) |
5085 | goto out; | |
5086 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5087 | ext4_mark_inode_dirty(handle, inode); | |
5088 | ext4_journal_stop(handle); | |
5089 | ||
5090 | out: | |
ca0e05e4 DM |
5091 | return dquot_quota_off(sb, type); |
5092 | } | |
5093 | ||
ac27a0ec DK |
5094 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5095 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5096 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5097 | * we don't have to be afraid of races */ |
617ba13b | 5098 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5099 | size_t len, loff_t off) |
5100 | { | |
5101 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5102 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5103 | int offset = off & (sb->s_blocksize - 1); |
5104 | int tocopy; | |
5105 | size_t toread; | |
5106 | struct buffer_head *bh; | |
5107 | loff_t i_size = i_size_read(inode); | |
5108 | ||
5109 | if (off > i_size) | |
5110 | return 0; | |
5111 | if (off+len > i_size) | |
5112 | len = i_size-off; | |
5113 | toread = len; | |
5114 | while (toread > 0) { | |
5115 | tocopy = sb->s_blocksize - offset < toread ? | |
5116 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5117 | bh = ext4_bread(NULL, inode, blk, 0); |
5118 | if (IS_ERR(bh)) | |
5119 | return PTR_ERR(bh); | |
ac27a0ec DK |
5120 | if (!bh) /* A hole? */ |
5121 | memset(data, 0, tocopy); | |
5122 | else | |
5123 | memcpy(data, bh->b_data+offset, tocopy); | |
5124 | brelse(bh); | |
5125 | offset = 0; | |
5126 | toread -= tocopy; | |
5127 | data += tocopy; | |
5128 | blk++; | |
5129 | } | |
5130 | return len; | |
5131 | } | |
5132 | ||
5133 | /* Write to quotafile (we know the transaction is already started and has | |
5134 | * enough credits) */ | |
617ba13b | 5135 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5136 | const char *data, size_t len, loff_t off) |
5137 | { | |
5138 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5139 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5140 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5141 | int retries = 0; |
ac27a0ec DK |
5142 | struct buffer_head *bh; |
5143 | handle_t *handle = journal_current_handle(); | |
5144 | ||
0390131b | 5145 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5146 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5147 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5148 | (unsigned long long)off, (unsigned long long)len); |
5149 | return -EIO; | |
5150 | } | |
67eeb568 DM |
5151 | /* |
5152 | * Since we account only one data block in transaction credits, | |
5153 | * then it is impossible to cross a block boundary. | |
5154 | */ | |
5155 | if (sb->s_blocksize - offset < len) { | |
5156 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5157 | " cancelled because not block aligned", | |
5158 | (unsigned long long)off, (unsigned long long)len); | |
5159 | return -EIO; | |
5160 | } | |
5161 | ||
c5e298ae TT |
5162 | do { |
5163 | bh = ext4_bread(handle, inode, blk, | |
5164 | EXT4_GET_BLOCKS_CREATE | | |
5165 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5166 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5167 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5168 | if (IS_ERR(bh)) |
5169 | return PTR_ERR(bh); | |
67eeb568 DM |
5170 | if (!bh) |
5171 | goto out; | |
5d601255 | 5172 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5173 | err = ext4_journal_get_write_access(handle, bh); |
5174 | if (err) { | |
5175 | brelse(bh); | |
1c215028 | 5176 | return err; |
ac27a0ec | 5177 | } |
67eeb568 DM |
5178 | lock_buffer(bh); |
5179 | memcpy(bh->b_data+offset, data, len); | |
5180 | flush_dcache_page(bh->b_page); | |
5181 | unlock_buffer(bh); | |
62d2b5f2 | 5182 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5183 | brelse(bh); |
ac27a0ec | 5184 | out: |
67eeb568 DM |
5185 | if (inode->i_size < off + len) { |
5186 | i_size_write(inode, off + len); | |
617ba13b | 5187 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5188 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5189 | } |
67eeb568 | 5190 | return len; |
ac27a0ec DK |
5191 | } |
5192 | ||
5193 | #endif | |
5194 | ||
152a0836 AV |
5195 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5196 | const char *dev_name, void *data) | |
ac27a0ec | 5197 | { |
152a0836 | 5198 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5199 | } |
5200 | ||
c290ea01 | 5201 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
5202 | static inline void register_as_ext2(void) |
5203 | { | |
5204 | int err = register_filesystem(&ext2_fs_type); | |
5205 | if (err) | |
5206 | printk(KERN_WARNING | |
5207 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5208 | } | |
5209 | ||
5210 | static inline void unregister_as_ext2(void) | |
5211 | { | |
5212 | unregister_filesystem(&ext2_fs_type); | |
5213 | } | |
2035e776 TT |
5214 | |
5215 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5216 | { | |
e2b911c5 | 5217 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 TT |
5218 | return 0; |
5219 | if (sb->s_flags & MS_RDONLY) | |
5220 | return 1; | |
e2b911c5 | 5221 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
5222 | return 0; |
5223 | return 1; | |
5224 | } | |
24b58424 TT |
5225 | #else |
5226 | static inline void register_as_ext2(void) { } | |
5227 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5228 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5229 | #endif |
5230 | ||
24b58424 TT |
5231 | static inline void register_as_ext3(void) |
5232 | { | |
5233 | int err = register_filesystem(&ext3_fs_type); | |
5234 | if (err) | |
5235 | printk(KERN_WARNING | |
5236 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5237 | } | |
5238 | ||
5239 | static inline void unregister_as_ext3(void) | |
5240 | { | |
5241 | unregister_filesystem(&ext3_fs_type); | |
5242 | } | |
2035e776 TT |
5243 | |
5244 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5245 | { | |
e2b911c5 | 5246 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 5247 | return 0; |
e2b911c5 | 5248 | if (!ext4_has_feature_journal(sb)) |
2035e776 TT |
5249 | return 0; |
5250 | if (sb->s_flags & MS_RDONLY) | |
5251 | return 1; | |
e2b911c5 | 5252 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
5253 | return 0; |
5254 | return 1; | |
5255 | } | |
24b58424 | 5256 | |
03010a33 TT |
5257 | static struct file_system_type ext4_fs_type = { |
5258 | .owner = THIS_MODULE, | |
5259 | .name = "ext4", | |
152a0836 | 5260 | .mount = ext4_mount, |
03010a33 TT |
5261 | .kill_sb = kill_block_super, |
5262 | .fs_flags = FS_REQUIRES_DEV, | |
5263 | }; | |
7f78e035 | 5264 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5265 | |
e9e3bcec ES |
5266 | /* Shared across all ext4 file systems */ |
5267 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5268 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5269 | ||
5dabfc78 | 5270 | static int __init ext4_init_fs(void) |
ac27a0ec | 5271 | { |
e9e3bcec | 5272 | int i, err; |
c9de560d | 5273 | |
e294a537 | 5274 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
5275 | ext4_li_info = NULL; |
5276 | mutex_init(&ext4_li_mtx); | |
5277 | ||
9a4c8019 | 5278 | /* Build-time check for flags consistency */ |
12e9b892 | 5279 | ext4_check_flag_values(); |
e9e3bcec ES |
5280 | |
5281 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5282 | mutex_init(&ext4__aio_mutex[i]); | |
5283 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5284 | } | |
5285 | ||
51865fda | 5286 | err = ext4_init_es(); |
6fd058f7 TT |
5287 | if (err) |
5288 | return err; | |
51865fda ZL |
5289 | |
5290 | err = ext4_init_pageio(); | |
5291 | if (err) | |
b5799018 | 5292 | goto out5; |
51865fda | 5293 | |
5dabfc78 | 5294 | err = ext4_init_system_zone(); |
bd2d0210 | 5295 | if (err) |
b5799018 | 5296 | goto out4; |
857ac889 | 5297 | |
b5799018 | 5298 | err = ext4_init_sysfs(); |
dd68314c | 5299 | if (err) |
b5799018 | 5300 | goto out3; |
857ac889 | 5301 | |
5dabfc78 | 5302 | err = ext4_init_mballoc(); |
c9de560d AT |
5303 | if (err) |
5304 | goto out2; | |
9c191f70 M |
5305 | else |
5306 | ext4_mballoc_ready = 1; | |
ac27a0ec DK |
5307 | err = init_inodecache(); |
5308 | if (err) | |
5309 | goto out1; | |
24b58424 | 5310 | register_as_ext3(); |
2035e776 | 5311 | register_as_ext2(); |
03010a33 | 5312 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5313 | if (err) |
5314 | goto out; | |
bfff6873 | 5315 | |
ac27a0ec DK |
5316 | return 0; |
5317 | out: | |
24b58424 TT |
5318 | unregister_as_ext2(); |
5319 | unregister_as_ext3(); | |
ac27a0ec DK |
5320 | destroy_inodecache(); |
5321 | out1: | |
9c191f70 | 5322 | ext4_mballoc_ready = 0; |
5dabfc78 | 5323 | ext4_exit_mballoc(); |
9c191f70 | 5324 | out2: |
b5799018 TT |
5325 | ext4_exit_sysfs(); |
5326 | out3: | |
5dabfc78 | 5327 | ext4_exit_system_zone(); |
b5799018 | 5328 | out4: |
5dabfc78 | 5329 | ext4_exit_pageio(); |
b5799018 | 5330 | out5: |
51865fda ZL |
5331 | ext4_exit_es(); |
5332 | ||
ac27a0ec DK |
5333 | return err; |
5334 | } | |
5335 | ||
5dabfc78 | 5336 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5337 | { |
e298e73b | 5338 | ext4_exit_crypto(); |
bfff6873 | 5339 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5340 | unregister_as_ext2(); |
5341 | unregister_as_ext3(); | |
03010a33 | 5342 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5343 | destroy_inodecache(); |
5dabfc78 | 5344 | ext4_exit_mballoc(); |
b5799018 | 5345 | ext4_exit_sysfs(); |
5dabfc78 TT |
5346 | ext4_exit_system_zone(); |
5347 | ext4_exit_pageio(); | |
dd12ed14 | 5348 | ext4_exit_es(); |
ac27a0ec DK |
5349 | } |
5350 | ||
5351 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5352 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5353 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5354 | module_init(ext4_init_fs) |
5355 | module_exit(ext4_exit_fs) |