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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> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/buffer_head.h> | |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
9f6200bb | 38 | #include <linux/proc_fs.h> |
3197ebdb | 39 | #include <linux/ctype.h> |
1330593e | 40 | #include <linux/log2.h> |
717d50e4 | 41 | #include <linux/crc16.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
3dcf5451 CH |
44 | #include "ext4.h" |
45 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
46 | #include "xattr.h" |
47 | #include "acl.h" | |
3661d286 | 48 | #include "mballoc.h" |
ac27a0ec | 49 | |
9bffad1e TT |
50 | #define CREATE_TRACE_POINTS |
51 | #include <trace/events/ext4.h> | |
52 | ||
9f6200bb | 53 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 54 | static struct kset *ext4_kset; |
9f6200bb | 55 | |
617ba13b | 56 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 57 | unsigned long journal_devnum); |
e2d67052 | 58 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
59 | static void ext4_mark_recovery_complete(struct super_block *sb, |
60 | struct ext4_super_block *es); | |
61 | static void ext4_clear_journal_err(struct super_block *sb, | |
62 | struct ext4_super_block *es); | |
617ba13b | 63 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 64 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 65 | char nbuf[16]); |
2b2d6d01 TT |
66 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
67 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 68 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 69 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 70 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 71 | |
bd81d8ee | 72 | |
8fadc143 AR |
73 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
74 | struct ext4_group_desc *bg) | |
bd81d8ee | 75 | { |
3a14589c | 76 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 77 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 78 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
79 | } |
80 | ||
8fadc143 AR |
81 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
82 | struct ext4_group_desc *bg) | |
bd81d8ee | 83 | { |
5272f837 | 84 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 85 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 86 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
87 | } |
88 | ||
8fadc143 AR |
89 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
90 | struct ext4_group_desc *bg) | |
bd81d8ee | 91 | { |
5272f837 | 92 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 93 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 94 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
95 | } |
96 | ||
560671a0 AK |
97 | __u32 ext4_free_blks_count(struct super_block *sb, |
98 | struct ext4_group_desc *bg) | |
99 | { | |
100 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
101 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 102 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
103 | } |
104 | ||
105 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
106 | struct ext4_group_desc *bg) | |
107 | { | |
108 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
109 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 110 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
111 | } |
112 | ||
113 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
114 | struct ext4_group_desc *bg) | |
115 | { | |
116 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
117 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 118 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
119 | } |
120 | ||
121 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
122 | struct ext4_group_desc *bg) | |
123 | { | |
124 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
125 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 126 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
127 | } |
128 | ||
8fadc143 AR |
129 | void ext4_block_bitmap_set(struct super_block *sb, |
130 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 131 | { |
3a14589c | 132 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
133 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
134 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
135 | } |
136 | ||
8fadc143 AR |
137 | void ext4_inode_bitmap_set(struct super_block *sb, |
138 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 139 | { |
5272f837 | 140 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
141 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
142 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
143 | } |
144 | ||
8fadc143 AR |
145 | void ext4_inode_table_set(struct super_block *sb, |
146 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 147 | { |
5272f837 | 148 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
149 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
150 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
151 | } |
152 | ||
560671a0 AK |
153 | void ext4_free_blks_set(struct super_block *sb, |
154 | struct ext4_group_desc *bg, __u32 count) | |
155 | { | |
156 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
157 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
158 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
159 | } | |
160 | ||
161 | void ext4_free_inodes_set(struct super_block *sb, | |
162 | struct ext4_group_desc *bg, __u32 count) | |
163 | { | |
164 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
165 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
166 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
167 | } | |
168 | ||
169 | void ext4_used_dirs_set(struct super_block *sb, | |
170 | struct ext4_group_desc *bg, __u32 count) | |
171 | { | |
172 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
173 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
174 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
175 | } | |
176 | ||
177 | void ext4_itable_unused_set(struct super_block *sb, | |
178 | struct ext4_group_desc *bg, __u32 count) | |
179 | { | |
180 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
181 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
182 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
183 | } | |
184 | ||
d3d1faf6 CW |
185 | |
186 | /* Just increment the non-pointer handle value */ | |
187 | static handle_t *ext4_get_nojournal(void) | |
188 | { | |
189 | handle_t *handle = current->journal_info; | |
190 | unsigned long ref_cnt = (unsigned long)handle; | |
191 | ||
192 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
193 | ||
194 | ref_cnt++; | |
195 | handle = (handle_t *)ref_cnt; | |
196 | ||
197 | current->journal_info = handle; | |
198 | return handle; | |
199 | } | |
200 | ||
201 | ||
202 | /* Decrement the non-pointer handle value */ | |
203 | static void ext4_put_nojournal(handle_t *handle) | |
204 | { | |
205 | unsigned long ref_cnt = (unsigned long)handle; | |
206 | ||
207 | BUG_ON(ref_cnt == 0); | |
208 | ||
209 | ref_cnt--; | |
210 | handle = (handle_t *)ref_cnt; | |
211 | ||
212 | current->journal_info = handle; | |
213 | } | |
214 | ||
ac27a0ec | 215 | /* |
dab291af | 216 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
217 | * |
218 | * The only special thing we need to do here is to make sure that all | |
219 | * journal_end calls result in the superblock being marked dirty, so | |
220 | * that sync() will call the filesystem's write_super callback if | |
221 | * appropriate. | |
222 | */ | |
617ba13b | 223 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
224 | { |
225 | journal_t *journal; | |
226 | ||
227 | if (sb->s_flags & MS_RDONLY) | |
228 | return ERR_PTR(-EROFS); | |
229 | ||
230 | /* Special case here: if the journal has aborted behind our | |
231 | * backs (eg. EIO in the commit thread), then we still need to | |
232 | * take the FS itself readonly cleanly. */ | |
617ba13b | 233 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
234 | if (journal) { |
235 | if (is_journal_aborted(journal)) { | |
0b8e58a1 | 236 | ext4_abort(sb, __func__, "Detected aborted journal"); |
0390131b FM |
237 | return ERR_PTR(-EROFS); |
238 | } | |
239 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 240 | } |
d3d1faf6 | 241 | return ext4_get_nojournal(); |
ac27a0ec DK |
242 | } |
243 | ||
244 | /* | |
245 | * The only special thing we need to do here is to make sure that all | |
dab291af | 246 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
247 | * that sync() will call the filesystem's write_super callback if |
248 | * appropriate. | |
249 | */ | |
617ba13b | 250 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
251 | { |
252 | struct super_block *sb; | |
253 | int err; | |
254 | int rc; | |
255 | ||
0390131b | 256 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 257 | ext4_put_nojournal(handle); |
0390131b FM |
258 | return 0; |
259 | } | |
ac27a0ec DK |
260 | sb = handle->h_transaction->t_journal->j_private; |
261 | err = handle->h_err; | |
dab291af | 262 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
263 | |
264 | if (!err) | |
265 | err = rc; | |
266 | if (err) | |
617ba13b | 267 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
268 | return err; |
269 | } | |
270 | ||
617ba13b | 271 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
272 | struct buffer_head *bh, handle_t *handle, int err) |
273 | { | |
274 | char nbuf[16]; | |
617ba13b | 275 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 276 | |
0390131b FM |
277 | BUG_ON(!ext4_handle_valid(handle)); |
278 | ||
ac27a0ec DK |
279 | if (bh) |
280 | BUFFER_TRACE(bh, "abort"); | |
281 | ||
282 | if (!handle->h_err) | |
283 | handle->h_err = err; | |
284 | ||
285 | if (is_handle_aborted(handle)) | |
286 | return; | |
287 | ||
288 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
289 | caller, errstr, err_fn); | |
290 | ||
dab291af | 291 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
292 | } |
293 | ||
294 | /* Deal with the reporting of failure conditions on a filesystem such as | |
295 | * inconsistencies detected or read IO failures. | |
296 | * | |
297 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 298 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
299 | * write ordering constraints on the superblock which prevent us from |
300 | * writing it out straight away; and given that the journal is about to | |
301 | * be aborted, we can't rely on the current, or future, transactions to | |
302 | * write out the superblock safely. | |
303 | * | |
dab291af | 304 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
305 | * the journal instead. On recovery, the journal will compain about |
306 | * that error until we've noted it down and cleared it. | |
307 | */ | |
308 | ||
617ba13b | 309 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 310 | { |
617ba13b | 311 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 312 | |
617ba13b MC |
313 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
314 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
315 | |
316 | if (sb->s_flags & MS_RDONLY) | |
317 | return; | |
318 | ||
2b2d6d01 | 319 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 320 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 321 | |
4ab2f15b | 322 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 323 | if (journal) |
dab291af | 324 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 325 | } |
2b2d6d01 | 326 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 327 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
328 | sb->s_flags |= MS_RDONLY; |
329 | } | |
e2d67052 | 330 | ext4_commit_super(sb, 1); |
ac27a0ec | 331 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 332 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
333 | sb->s_id); |
334 | } | |
335 | ||
12062ddd | 336 | void __ext4_error(struct super_block *sb, const char *function, |
2b2d6d01 | 337 | const char *fmt, ...) |
ac27a0ec DK |
338 | { |
339 | va_list args; | |
340 | ||
341 | va_start(args, fmt); | |
2b2d6d01 | 342 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
343 | vprintk(fmt, args); |
344 | printk("\n"); | |
345 | va_end(args); | |
346 | ||
617ba13b | 347 | ext4_handle_error(sb); |
ac27a0ec DK |
348 | } |
349 | ||
273df556 FM |
350 | void ext4_error_inode(const char *function, struct inode *inode, |
351 | const char *fmt, ...) | |
352 | { | |
353 | va_list args; | |
354 | ||
355 | va_start(args, fmt); | |
356 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: inode #%lu: (comm %s) ", | |
357 | inode->i_sb->s_id, function, inode->i_ino, current->comm); | |
358 | vprintk(fmt, args); | |
359 | printk("\n"); | |
360 | va_end(args); | |
361 | ||
362 | ext4_handle_error(inode->i_sb); | |
363 | } | |
364 | ||
365 | void ext4_error_file(const char *function, struct file *file, | |
366 | const char *fmt, ...) | |
367 | { | |
368 | va_list args; | |
369 | struct inode *inode = file->f_dentry->d_inode; | |
370 | char pathname[80], *path; | |
371 | ||
372 | va_start(args, fmt); | |
373 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); | |
374 | if (!path) | |
375 | path = "(unknown)"; | |
376 | printk(KERN_CRIT | |
377 | "EXT4-fs error (device %s): %s: inode #%lu (comm %s path %s): ", | |
378 | inode->i_sb->s_id, function, inode->i_ino, current->comm, path); | |
379 | vprintk(fmt, args); | |
380 | printk("\n"); | |
381 | va_end(args); | |
382 | ||
383 | ext4_handle_error(inode->i_sb); | |
384 | } | |
385 | ||
2b2d6d01 | 386 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
387 | char nbuf[16]) |
388 | { | |
389 | char *errstr = NULL; | |
390 | ||
391 | switch (errno) { | |
392 | case -EIO: | |
393 | errstr = "IO failure"; | |
394 | break; | |
395 | case -ENOMEM: | |
396 | errstr = "Out of memory"; | |
397 | break; | |
398 | case -EROFS: | |
78f1ddbb TT |
399 | if (!sb || (EXT4_SB(sb)->s_journal && |
400 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
401 | errstr = "Journal has aborted"; |
402 | else | |
403 | errstr = "Readonly filesystem"; | |
404 | break; | |
405 | default: | |
406 | /* If the caller passed in an extra buffer for unknown | |
407 | * errors, textualise them now. Else we just return | |
408 | * NULL. */ | |
409 | if (nbuf) { | |
410 | /* Check for truncated error codes... */ | |
411 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
412 | errstr = nbuf; | |
413 | } | |
414 | break; | |
415 | } | |
416 | ||
417 | return errstr; | |
418 | } | |
419 | ||
617ba13b | 420 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
421 | * automatically and invokes the appropriate error response. */ |
422 | ||
2b2d6d01 | 423 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
424 | { |
425 | char nbuf[16]; | |
426 | const char *errstr; | |
427 | ||
428 | /* Special case: if the error is EROFS, and we're not already | |
429 | * inside a transaction, then there's really no point in logging | |
430 | * an error. */ | |
431 | if (errno == -EROFS && journal_current_handle() == NULL && | |
432 | (sb->s_flags & MS_RDONLY)) | |
433 | return; | |
434 | ||
617ba13b | 435 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
436 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
437 | sb->s_id, function, errstr); | |
ac27a0ec | 438 | |
617ba13b | 439 | ext4_handle_error(sb); |
ac27a0ec DK |
440 | } |
441 | ||
442 | /* | |
617ba13b | 443 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
444 | * abort function may be used to deal with unrecoverable failures such |
445 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
446 | * | |
447 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
448 | * unless the error response on the fs has been set to panic in which | |
449 | * case we take the easy way out and panic immediately. | |
450 | */ | |
451 | ||
2b2d6d01 TT |
452 | void ext4_abort(struct super_block *sb, const char *function, |
453 | const char *fmt, ...) | |
ac27a0ec DK |
454 | { |
455 | va_list args; | |
456 | ||
ac27a0ec | 457 | va_start(args, fmt); |
2b2d6d01 | 458 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
459 | vprintk(fmt, args); |
460 | printk("\n"); | |
461 | va_end(args); | |
462 | ||
463 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 464 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
465 | |
466 | if (sb->s_flags & MS_RDONLY) | |
467 | return; | |
468 | ||
b31e1552 | 469 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
617ba13b | 470 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 471 | sb->s_flags |= MS_RDONLY; |
4ab2f15b | 472 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ef2cabf7 HK |
473 | if (EXT4_SB(sb)->s_journal) |
474 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
475 | } |
476 | ||
b31e1552 ES |
477 | void ext4_msg (struct super_block * sb, const char *prefix, |
478 | const char *fmt, ...) | |
479 | { | |
480 | va_list args; | |
481 | ||
482 | va_start(args, fmt); | |
483 | printk("%sEXT4-fs (%s): ", prefix, sb->s_id); | |
484 | vprintk(fmt, args); | |
485 | printk("\n"); | |
486 | va_end(args); | |
487 | } | |
488 | ||
12062ddd | 489 | void __ext4_warning(struct super_block *sb, const char *function, |
2b2d6d01 | 490 | const char *fmt, ...) |
ac27a0ec DK |
491 | { |
492 | va_list args; | |
493 | ||
494 | va_start(args, fmt); | |
617ba13b | 495 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
496 | sb->s_id, function); |
497 | vprintk(fmt, args); | |
498 | printk("\n"); | |
499 | va_end(args); | |
500 | } | |
501 | ||
5d1b1b3f | 502 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
0b8e58a1 | 503 | const char *function, const char *fmt, ...) |
5d1b1b3f AK |
504 | __releases(bitlock) |
505 | __acquires(bitlock) | |
506 | { | |
507 | va_list args; | |
508 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
509 | ||
510 | va_start(args, fmt); | |
511 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
512 | vprintk(fmt, args); | |
513 | printk("\n"); | |
514 | va_end(args); | |
515 | ||
516 | if (test_opt(sb, ERRORS_CONT)) { | |
517 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
518 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 519 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
520 | return; |
521 | } | |
522 | ext4_unlock_group(sb, grp); | |
523 | ext4_handle_error(sb); | |
524 | /* | |
525 | * We only get here in the ERRORS_RO case; relocking the group | |
526 | * may be dangerous, but nothing bad will happen since the | |
527 | * filesystem will have already been marked read/only and the | |
528 | * journal has been aborted. We return 1 as a hint to callers | |
529 | * who might what to use the return value from | |
530 | * ext4_grp_locked_error() to distinguish beween the | |
531 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
532 | * aggressively from the ext4 function in question, with a | |
533 | * more appropriate error code. | |
534 | */ | |
535 | ext4_lock_group(sb, grp); | |
536 | return; | |
537 | } | |
538 | ||
617ba13b | 539 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 540 | { |
617ba13b | 541 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 542 | |
617ba13b | 543 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
544 | return; |
545 | ||
12062ddd | 546 | ext4_warning(sb, |
ac27a0ec DK |
547 | "updating to rev %d because of new feature flag, " |
548 | "running e2fsck is recommended", | |
617ba13b | 549 | EXT4_DYNAMIC_REV); |
ac27a0ec | 550 | |
617ba13b MC |
551 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
552 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
553 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
554 | /* leave es->s_feature_*compat flags alone */ |
555 | /* es->s_uuid will be set by e2fsck if empty */ | |
556 | ||
557 | /* | |
558 | * The rest of the superblock fields should be zero, and if not it | |
559 | * means they are likely already in use, so leave them alone. We | |
560 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
561 | */ | |
562 | } | |
563 | ||
564 | /* | |
565 | * Open the external journal device | |
566 | */ | |
b31e1552 | 567 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
568 | { |
569 | struct block_device *bdev; | |
570 | char b[BDEVNAME_SIZE]; | |
571 | ||
572 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
573 | if (IS_ERR(bdev)) | |
574 | goto fail; | |
575 | return bdev; | |
576 | ||
577 | fail: | |
b31e1552 | 578 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
579 | __bdevname(dev, b), PTR_ERR(bdev)); |
580 | return NULL; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Release the journal device | |
585 | */ | |
617ba13b | 586 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
587 | { |
588 | bd_release(bdev); | |
9a1c3542 | 589 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
590 | } |
591 | ||
617ba13b | 592 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
593 | { |
594 | struct block_device *bdev; | |
595 | int ret = -ENODEV; | |
596 | ||
597 | bdev = sbi->journal_bdev; | |
598 | if (bdev) { | |
617ba13b | 599 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
600 | sbi->journal_bdev = NULL; |
601 | } | |
602 | return ret; | |
603 | } | |
604 | ||
605 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
606 | { | |
617ba13b | 607 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
608 | } |
609 | ||
617ba13b | 610 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
611 | { |
612 | struct list_head *l; | |
613 | ||
b31e1552 ES |
614 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
615 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
616 | |
617 | printk(KERN_ERR "sb_info orphan list:\n"); | |
618 | list_for_each(l, &sbi->s_orphan) { | |
619 | struct inode *inode = orphan_list_entry(l); | |
620 | printk(KERN_ERR " " | |
621 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
622 | inode->i_sb->s_id, inode->i_ino, inode, | |
623 | inode->i_mode, inode->i_nlink, | |
624 | NEXT_ORPHAN(inode)); | |
625 | } | |
626 | } | |
627 | ||
2b2d6d01 | 628 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 629 | { |
617ba13b MC |
630 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
631 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 632 | int i, err; |
ac27a0ec | 633 | |
4c0425ff MC |
634 | flush_workqueue(sbi->dio_unwritten_wq); |
635 | destroy_workqueue(sbi->dio_unwritten_wq); | |
636 | ||
a9e220f8 | 637 | lock_super(sb); |
6cfd0148 | 638 | lock_kernel(); |
8c85e125 | 639 | if (sb->s_dirt) |
ebc1ac16 | 640 | ext4_commit_super(sb, 1); |
8c85e125 | 641 | |
0390131b FM |
642 | if (sbi->s_journal) { |
643 | err = jbd2_journal_destroy(sbi->s_journal); | |
644 | sbi->s_journal = NULL; | |
645 | if (err < 0) | |
646 | ext4_abort(sb, __func__, | |
647 | "Couldn't clean up the journal"); | |
648 | } | |
d4edac31 JB |
649 | |
650 | ext4_release_system_zone(sb); | |
651 | ext4_mb_release(sb); | |
652 | ext4_ext_release(sb); | |
653 | ext4_xattr_put_super(sb); | |
654 | ||
ac27a0ec | 655 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 656 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 657 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 658 | ext4_commit_super(sb, 1); |
ac27a0ec | 659 | } |
240799cd | 660 | if (sbi->s_proc) { |
9f6200bb | 661 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 662 | } |
3197ebdb | 663 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
664 | |
665 | for (i = 0; i < sbi->s_gdb_count; i++) | |
666 | brelse(sbi->s_group_desc[i]); | |
667 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
668 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
669 | vfree(sbi->s_flex_groups); | |
670 | else | |
671 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
672 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
673 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
674 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 675 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
676 | brelse(sbi->s_sbh); |
677 | #ifdef CONFIG_QUOTA | |
678 | for (i = 0; i < MAXQUOTAS; i++) | |
679 | kfree(sbi->s_qf_names[i]); | |
680 | #endif | |
681 | ||
682 | /* Debugging code just in case the in-memory inode orphan list | |
683 | * isn't empty. The on-disk one can be non-empty if we've | |
684 | * detected an error and taken the fs readonly, but the | |
685 | * in-memory list had better be clean by this point. */ | |
686 | if (!list_empty(&sbi->s_orphan)) | |
687 | dump_orphan_list(sb, sbi); | |
688 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
689 | ||
f98393a6 | 690 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
691 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
692 | /* | |
693 | * Invalidate the journal device's buffers. We don't want them | |
694 | * floating about in memory - the physical journal device may | |
695 | * hotswapped, and it breaks the `ro-after' testing code. | |
696 | */ | |
697 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 698 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 699 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
700 | } |
701 | sb->s_fs_info = NULL; | |
3197ebdb TT |
702 | /* |
703 | * Now that we are completely done shutting down the | |
704 | * superblock, we need to actually destroy the kobject. | |
705 | */ | |
706 | unlock_kernel(); | |
707 | unlock_super(sb); | |
708 | kobject_put(&sbi->s_kobj); | |
709 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 710 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 711 | kfree(sbi); |
ac27a0ec DK |
712 | } |
713 | ||
e18b890b | 714 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
715 | |
716 | /* | |
717 | * Called inside transaction, so use GFP_NOFS | |
718 | */ | |
617ba13b | 719 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 720 | { |
617ba13b | 721 | struct ext4_inode_info *ei; |
ac27a0ec | 722 | |
e6b4f8da | 723 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
724 | if (!ei) |
725 | return NULL; | |
0b8e58a1 | 726 | |
ac27a0ec | 727 | ei->vfs_inode.i_version = 1; |
91246c00 | 728 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 729 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
730 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
731 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
732 | /* |
733 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
734 | * therefore it can be null here. Don't check it, just initialize | |
735 | * jinode. | |
736 | */ | |
678aaf48 | 737 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
738 | ei->i_reserved_data_blocks = 0; |
739 | ei->i_reserved_meta_blocks = 0; | |
740 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 741 | ei->i_da_metadata_calc_len = 0; |
d2a17637 MC |
742 | ei->i_delalloc_reserved_flag = 0; |
743 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
a9e7f447 DM |
744 | #ifdef CONFIG_QUOTA |
745 | ei->i_reserved_quota = 0; | |
746 | #endif | |
c7064ef1 | 747 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 748 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 749 | ei->cur_aio_dio = NULL; |
b436b9be JK |
750 | ei->i_sync_tid = 0; |
751 | ei->i_datasync_tid = 0; | |
0b8e58a1 | 752 | |
ac27a0ec DK |
753 | return &ei->vfs_inode; |
754 | } | |
755 | ||
617ba13b | 756 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 757 | { |
9f7dd93d | 758 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
759 | ext4_msg(inode->i_sb, KERN_ERR, |
760 | "Inode %lu (%p): orphan list check failed!", | |
761 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
762 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
763 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
764 | true); | |
765 | dump_stack(); | |
766 | } | |
617ba13b | 767 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
768 | } |
769 | ||
51cc5068 | 770 | static void init_once(void *foo) |
ac27a0ec | 771 | { |
617ba13b | 772 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 773 | |
a35afb83 | 774 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 775 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 776 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 777 | #endif |
0e855ac8 | 778 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 779 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
780 | } |
781 | ||
782 | static int init_inodecache(void) | |
783 | { | |
617ba13b MC |
784 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
785 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
786 | 0, (SLAB_RECLAIM_ACCOUNT| |
787 | SLAB_MEM_SPREAD), | |
20c2df83 | 788 | init_once); |
617ba13b | 789 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
790 | return -ENOMEM; |
791 | return 0; | |
792 | } | |
793 | ||
794 | static void destroy_inodecache(void) | |
795 | { | |
617ba13b | 796 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
797 | } |
798 | ||
617ba13b | 799 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 800 | { |
c2ea3fde | 801 | ext4_discard_preallocations(inode); |
0390131b FM |
802 | if (EXT4_JOURNAL(inode)) |
803 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 804 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
805 | } |
806 | ||
2b2d6d01 TT |
807 | static inline void ext4_show_quota_options(struct seq_file *seq, |
808 | struct super_block *sb) | |
ac27a0ec DK |
809 | { |
810 | #if defined(CONFIG_QUOTA) | |
617ba13b | 811 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 812 | |
5a20bdfc JK |
813 | if (sbi->s_jquota_fmt) { |
814 | char *fmtname = ""; | |
815 | ||
816 | switch (sbi->s_jquota_fmt) { | |
817 | case QFMT_VFS_OLD: | |
818 | fmtname = "vfsold"; | |
819 | break; | |
820 | case QFMT_VFS_V0: | |
821 | fmtname = "vfsv0"; | |
822 | break; | |
823 | case QFMT_VFS_V1: | |
824 | fmtname = "vfsv1"; | |
825 | break; | |
826 | } | |
827 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
828 | } | |
ac27a0ec DK |
829 | |
830 | if (sbi->s_qf_names[USRQUOTA]) | |
831 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
832 | ||
833 | if (sbi->s_qf_names[GRPQUOTA]) | |
834 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
835 | ||
482a7425 | 836 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
837 | seq_puts(seq, ",usrquota"); |
838 | ||
482a7425 | 839 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
840 | seq_puts(seq, ",grpquota"); |
841 | #endif | |
842 | } | |
843 | ||
d9c9bef1 MS |
844 | /* |
845 | * Show an option if | |
846 | * - it's set to a non-default value OR | |
847 | * - if the per-sb default is different from the global default | |
848 | */ | |
617ba13b | 849 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 850 | { |
aa22df2c AK |
851 | int def_errors; |
852 | unsigned long def_mount_opts; | |
ac27a0ec | 853 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
854 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
855 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
856 | |
857 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 858 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
859 | |
860 | if (sbi->s_sb_block != 1) | |
861 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
862 | if (test_opt(sb, MINIX_DF)) | |
863 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 864 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
865 | seq_puts(seq, ",grpid"); |
866 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
867 | seq_puts(seq, ",nogrpid"); | |
868 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
869 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
870 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
871 | } | |
872 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
873 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
874 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
875 | } | |
bb4f397a | 876 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 877 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
878 | def_errors == EXT4_ERRORS_CONTINUE) { |
879 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
880 | } |
881 | } | |
aa22df2c | 882 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 883 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 884 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 885 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 886 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 887 | seq_puts(seq, ",nouid32"); |
aa22df2c | 888 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
889 | seq_puts(seq, ",debug"); |
890 | if (test_opt(sb, OLDALLOC)) | |
891 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 892 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
893 | if (test_opt(sb, XATTR_USER) && |
894 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
895 | seq_puts(seq, ",user_xattr"); |
896 | if (!test_opt(sb, XATTR_USER) && | |
897 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
898 | seq_puts(seq, ",nouser_xattr"); | |
899 | } | |
900 | #endif | |
03010a33 | 901 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 902 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
903 | seq_puts(seq, ",acl"); |
904 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
905 | seq_puts(seq, ",noacl"); | |
906 | #endif | |
30773840 | 907 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
908 | seq_printf(seq, ",commit=%u", |
909 | (unsigned) (sbi->s_commit_interval / HZ)); | |
910 | } | |
30773840 TT |
911 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
912 | seq_printf(seq, ",min_batch_time=%u", | |
913 | (unsigned) sbi->s_min_batch_time); | |
914 | } | |
915 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
916 | seq_printf(seq, ",max_batch_time=%u", | |
917 | (unsigned) sbi->s_min_batch_time); | |
918 | } | |
919 | ||
571640ca ES |
920 | /* |
921 | * We're changing the default of barrier mount option, so | |
922 | * let's always display its mount state so it's clear what its | |
923 | * status is. | |
924 | */ | |
925 | seq_puts(seq, ",barrier="); | |
926 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
927 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
928 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
929 | if (test_opt(sb, NOBH)) |
930 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
931 | if (test_opt(sb, I_VERSION)) |
932 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
933 | if (!test_opt(sb, DELALLOC)) |
934 | seq_puts(seq, ",nodelalloc"); | |
935 | ||
ac27a0ec | 936 | |
cb45bbe4 MS |
937 | if (sbi->s_stripe) |
938 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
939 | /* |
940 | * journal mode get enabled in different ways | |
941 | * So just print the value even if we didn't specify it | |
942 | */ | |
617ba13b | 943 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 944 | seq_puts(seq, ",data=journal"); |
617ba13b | 945 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 946 | seq_puts(seq, ",data=ordered"); |
617ba13b | 947 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
948 | seq_puts(seq, ",data=writeback"); |
949 | ||
240799cd TT |
950 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
951 | seq_printf(seq, ",inode_readahead_blks=%u", | |
952 | sbi->s_inode_readahead_blks); | |
953 | ||
5bf5683a HK |
954 | if (test_opt(sb, DATA_ERR_ABORT)) |
955 | seq_puts(seq, ",data_err=abort"); | |
956 | ||
afd4672d | 957 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 958 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 959 | |
5328e635 ES |
960 | if (test_opt(sb, DISCARD)) |
961 | seq_puts(seq, ",discard"); | |
962 | ||
e3bb52ae ES |
963 | if (test_opt(sb, NOLOAD)) |
964 | seq_puts(seq, ",norecovery"); | |
965 | ||
744692dc JZ |
966 | if (test_opt(sb, DIOREAD_NOLOCK)) |
967 | seq_puts(seq, ",dioread_nolock"); | |
968 | ||
617ba13b | 969 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 970 | |
ac27a0ec DK |
971 | return 0; |
972 | } | |
973 | ||
1b961ac0 | 974 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 975 | u64 ino, u32 generation) |
ac27a0ec | 976 | { |
ac27a0ec | 977 | struct inode *inode; |
ac27a0ec | 978 | |
617ba13b | 979 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 980 | return ERR_PTR(-ESTALE); |
617ba13b | 981 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
982 | return ERR_PTR(-ESTALE); |
983 | ||
984 | /* iget isn't really right if the inode is currently unallocated!! | |
985 | * | |
617ba13b | 986 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
987 | * deleted, so we should be safe. |
988 | * | |
989 | * Currently we don't know the generation for parent directory, so | |
990 | * a generation of 0 means "accept any" | |
991 | */ | |
1d1fe1ee DH |
992 | inode = ext4_iget(sb, ino); |
993 | if (IS_ERR(inode)) | |
994 | return ERR_CAST(inode); | |
995 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
996 | iput(inode); |
997 | return ERR_PTR(-ESTALE); | |
998 | } | |
1b961ac0 CH |
999 | |
1000 | return inode; | |
1001 | } | |
1002 | ||
1003 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1004 | int fh_len, int fh_type) |
1b961ac0 CH |
1005 | { |
1006 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1007 | ext4_nfs_get_inode); | |
1008 | } | |
1009 | ||
1010 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1011 | int fh_len, int fh_type) |
1b961ac0 CH |
1012 | { |
1013 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1014 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1015 | } |
1016 | ||
c39a7f84 TO |
1017 | /* |
1018 | * Try to release metadata pages (indirect blocks, directories) which are | |
1019 | * mapped via the block device. Since these pages could have journal heads | |
1020 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1021 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1022 | */ | |
0b8e58a1 AD |
1023 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1024 | gfp_t wait) | |
c39a7f84 TO |
1025 | { |
1026 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1027 | ||
1028 | WARN_ON(PageChecked(page)); | |
1029 | if (!page_has_buffers(page)) | |
1030 | return 0; | |
1031 | if (journal) | |
1032 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1033 | wait & ~__GFP_WAIT); | |
1034 | return try_to_free_buffers(page); | |
1035 | } | |
1036 | ||
ac27a0ec | 1037 | #ifdef CONFIG_QUOTA |
af5bc92d | 1038 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1039 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1040 | |
617ba13b MC |
1041 | static int ext4_write_dquot(struct dquot *dquot); |
1042 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1043 | static int ext4_release_dquot(struct dquot *dquot); | |
1044 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1045 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
1046 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
1047 | char *path, int remount); | |
617ba13b MC |
1048 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1049 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1050 | size_t len, loff_t off); |
617ba13b | 1051 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1052 | const char *data, size_t len, loff_t off); |
1053 | ||
61e225dc | 1054 | static const struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
1055 | .initialize = dquot_initialize, |
1056 | .drop = dquot_drop, | |
ac27a0ec | 1057 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
1058 | .reserve_space = dquot_reserve_space, |
1059 | .claim_space = dquot_claim_space, | |
1060 | .release_rsv = dquot_release_reserved_space, | |
a9e7f447 | 1061 | #ifdef CONFIG_QUOTA |
60e58e0f | 1062 | .get_reserved_space = ext4_get_reserved_space, |
a9e7f447 | 1063 | #endif |
ac27a0ec DK |
1064 | .alloc_inode = dquot_alloc_inode, |
1065 | .free_space = dquot_free_space, | |
1066 | .free_inode = dquot_free_inode, | |
1067 | .transfer = dquot_transfer, | |
617ba13b MC |
1068 | .write_dquot = ext4_write_dquot, |
1069 | .acquire_dquot = ext4_acquire_dquot, | |
1070 | .release_dquot = ext4_release_dquot, | |
1071 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1072 | .write_info = ext4_write_info, |
1073 | .alloc_dquot = dquot_alloc, | |
1074 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1075 | }; |
1076 | ||
0d54b217 | 1077 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1078 | .quota_on = ext4_quota_on, |
ac27a0ec DK |
1079 | .quota_off = vfs_quota_off, |
1080 | .quota_sync = vfs_quota_sync, | |
1081 | .get_info = vfs_get_dqinfo, | |
1082 | .set_info = vfs_set_dqinfo, | |
1083 | .get_dqblk = vfs_get_dqblk, | |
1084 | .set_dqblk = vfs_set_dqblk | |
1085 | }; | |
1086 | #endif | |
1087 | ||
ee9b6d61 | 1088 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1089 | .alloc_inode = ext4_alloc_inode, |
1090 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1091 | .write_inode = ext4_write_inode, |
1092 | .dirty_inode = ext4_dirty_inode, | |
1093 | .delete_inode = ext4_delete_inode, | |
1094 | .put_super = ext4_put_super, | |
617ba13b | 1095 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1096 | .freeze_fs = ext4_freeze, |
1097 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1098 | .statfs = ext4_statfs, |
1099 | .remount_fs = ext4_remount, | |
1100 | .clear_inode = ext4_clear_inode, | |
1101 | .show_options = ext4_show_options, | |
ac27a0ec | 1102 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1103 | .quota_read = ext4_quota_read, |
1104 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1105 | #endif |
c39a7f84 | 1106 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1107 | }; |
1108 | ||
9ca92389 TT |
1109 | static const struct super_operations ext4_nojournal_sops = { |
1110 | .alloc_inode = ext4_alloc_inode, | |
1111 | .destroy_inode = ext4_destroy_inode, | |
1112 | .write_inode = ext4_write_inode, | |
1113 | .dirty_inode = ext4_dirty_inode, | |
1114 | .delete_inode = ext4_delete_inode, | |
1115 | .write_super = ext4_write_super, | |
1116 | .put_super = ext4_put_super, | |
1117 | .statfs = ext4_statfs, | |
1118 | .remount_fs = ext4_remount, | |
1119 | .clear_inode = ext4_clear_inode, | |
1120 | .show_options = ext4_show_options, | |
1121 | #ifdef CONFIG_QUOTA | |
1122 | .quota_read = ext4_quota_read, | |
1123 | .quota_write = ext4_quota_write, | |
1124 | #endif | |
1125 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1126 | }; | |
1127 | ||
39655164 | 1128 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1129 | .fh_to_dentry = ext4_fh_to_dentry, |
1130 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1131 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1132 | }; |
1133 | ||
1134 | enum { | |
1135 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1136 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1137 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1138 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1139 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1140 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1141 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1142 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1143 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1144 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1145 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1146 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1147 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1148 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1149 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1150 | Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1151 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1152 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1153 | Opt_discard, Opt_nodiscard, |
ac27a0ec DK |
1154 | }; |
1155 | ||
a447c093 | 1156 | static const match_table_t tokens = { |
ac27a0ec DK |
1157 | {Opt_bsd_df, "bsddf"}, |
1158 | {Opt_minix_df, "minixdf"}, | |
1159 | {Opt_grpid, "grpid"}, | |
1160 | {Opt_grpid, "bsdgroups"}, | |
1161 | {Opt_nogrpid, "nogrpid"}, | |
1162 | {Opt_nogrpid, "sysvgroups"}, | |
1163 | {Opt_resgid, "resgid=%u"}, | |
1164 | {Opt_resuid, "resuid=%u"}, | |
1165 | {Opt_sb, "sb=%u"}, | |
1166 | {Opt_err_cont, "errors=continue"}, | |
1167 | {Opt_err_panic, "errors=panic"}, | |
1168 | {Opt_err_ro, "errors=remount-ro"}, | |
1169 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1170 | {Opt_debug, "debug"}, |
1171 | {Opt_oldalloc, "oldalloc"}, | |
1172 | {Opt_orlov, "orlov"}, | |
1173 | {Opt_user_xattr, "user_xattr"}, | |
1174 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1175 | {Opt_acl, "acl"}, | |
1176 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1177 | {Opt_noload, "noload"}, |
e3bb52ae | 1178 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1179 | {Opt_nobh, "nobh"}, |
1180 | {Opt_bh, "bh"}, | |
1181 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1182 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1183 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1184 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1185 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1186 | {Opt_journal_checksum, "journal_checksum"}, |
1187 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1188 | {Opt_abort, "abort"}, |
1189 | {Opt_data_journal, "data=journal"}, | |
1190 | {Opt_data_ordered, "data=ordered"}, | |
1191 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1192 | {Opt_data_err_abort, "data_err=abort"}, |
1193 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1194 | {Opt_offusrjquota, "usrjquota="}, |
1195 | {Opt_usrjquota, "usrjquota=%s"}, | |
1196 | {Opt_offgrpjquota, "grpjquota="}, | |
1197 | {Opt_grpjquota, "grpjquota=%s"}, | |
1198 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1199 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1200 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1201 | {Opt_grpquota, "grpquota"}, |
1202 | {Opt_noquota, "noquota"}, | |
1203 | {Opt_quota, "quota"}, | |
1204 | {Opt_usrquota, "usrquota"}, | |
1205 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1206 | {Opt_barrier, "barrier"}, |
1207 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1208 | {Opt_i_version, "i_version"}, |
c9de560d | 1209 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1210 | {Opt_resize, "resize"}, |
64769240 | 1211 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1212 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1213 | {Opt_block_validity, "block_validity"}, |
1214 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1215 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1216 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1217 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1218 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1219 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1220 | {Opt_dioread_nolock, "dioread_nolock"}, |
1221 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1222 | {Opt_discard, "discard"}, |
1223 | {Opt_nodiscard, "nodiscard"}, | |
f3f12faa | 1224 | {Opt_err, NULL}, |
ac27a0ec DK |
1225 | }; |
1226 | ||
617ba13b | 1227 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1228 | { |
617ba13b | 1229 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1230 | char *options = (char *) *data; |
1231 | ||
1232 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1233 | return 1; /* Default location */ | |
0b8e58a1 | 1234 | |
ac27a0ec | 1235 | options += 3; |
0b8e58a1 | 1236 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1237 | sb_block = simple_strtoul(options, &options, 0); |
1238 | if (*options && *options != ',') { | |
4776004f | 1239 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1240 | (char *) *data); |
1241 | return 1; | |
1242 | } | |
1243 | if (*options == ',') | |
1244 | options++; | |
1245 | *data = (void *) options; | |
0b8e58a1 | 1246 | |
ac27a0ec DK |
1247 | return sb_block; |
1248 | } | |
1249 | ||
b3881f74 | 1250 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1251 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1252 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1253 | |
56c50f11 DM |
1254 | #ifdef CONFIG_QUOTA |
1255 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1256 | { | |
1257 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1258 | char *qname; | |
1259 | ||
1260 | if (sb_any_quota_loaded(sb) && | |
1261 | !sbi->s_qf_names[qtype]) { | |
1262 | ext4_msg(sb, KERN_ERR, | |
1263 | "Cannot change journaled " | |
1264 | "quota options when quota turned on"); | |
1265 | return 0; | |
1266 | } | |
1267 | qname = match_strdup(args); | |
1268 | if (!qname) { | |
1269 | ext4_msg(sb, KERN_ERR, | |
1270 | "Not enough memory for storing quotafile name"); | |
1271 | return 0; | |
1272 | } | |
1273 | if (sbi->s_qf_names[qtype] && | |
1274 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1275 | ext4_msg(sb, KERN_ERR, | |
1276 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1277 | kfree(qname); | |
1278 | return 0; | |
1279 | } | |
1280 | sbi->s_qf_names[qtype] = qname; | |
1281 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1282 | ext4_msg(sb, KERN_ERR, | |
1283 | "quotafile must be on filesystem root"); | |
1284 | kfree(sbi->s_qf_names[qtype]); | |
1285 | sbi->s_qf_names[qtype] = NULL; | |
1286 | return 0; | |
1287 | } | |
1288 | set_opt(sbi->s_mount_opt, QUOTA); | |
1289 | return 1; | |
1290 | } | |
1291 | ||
1292 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1293 | { | |
1294 | ||
1295 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1296 | ||
1297 | if (sb_any_quota_loaded(sb) && | |
1298 | sbi->s_qf_names[qtype]) { | |
1299 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1300 | " when quota turned on"); | |
1301 | return 0; | |
1302 | } | |
1303 | /* | |
1304 | * The space will be released later when all options are confirmed | |
1305 | * to be correct | |
1306 | */ | |
1307 | sbi->s_qf_names[qtype] = NULL; | |
1308 | return 1; | |
1309 | } | |
1310 | #endif | |
1311 | ||
2b2d6d01 | 1312 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1313 | unsigned long *journal_devnum, |
b3881f74 | 1314 | unsigned int *journal_ioprio, |
2b2d6d01 | 1315 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1316 | { |
617ba13b | 1317 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1318 | char *p; |
ac27a0ec DK |
1319 | substring_t args[MAX_OPT_ARGS]; |
1320 | int data_opt = 0; | |
1321 | int option; | |
1322 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1323 | int qfmt; |
ac27a0ec DK |
1324 | #endif |
1325 | ||
1326 | if (!options) | |
1327 | return 1; | |
1328 | ||
2b2d6d01 | 1329 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1330 | int token; |
1331 | if (!*p) | |
1332 | continue; | |
1333 | ||
15121c18 ES |
1334 | /* |
1335 | * Initialize args struct so we know whether arg was | |
1336 | * found; some options take optional arguments. | |
1337 | */ | |
1338 | args[0].to = args[0].from = 0; | |
ac27a0ec DK |
1339 | token = match_token(p, tokens, args); |
1340 | switch (token) { | |
1341 | case Opt_bsd_df: | |
437ca0fd | 1342 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1343 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1344 | break; |
1345 | case Opt_minix_df: | |
437ca0fd | 1346 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1347 | set_opt(sbi->s_mount_opt, MINIX_DF); |
437ca0fd | 1348 | |
ac27a0ec DK |
1349 | break; |
1350 | case Opt_grpid: | |
437ca0fd | 1351 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1352 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1353 | |
ac27a0ec DK |
1354 | break; |
1355 | case Opt_nogrpid: | |
437ca0fd | 1356 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1357 | clear_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1358 | |
ac27a0ec DK |
1359 | break; |
1360 | case Opt_resuid: | |
1361 | if (match_int(&args[0], &option)) | |
1362 | return 0; | |
1363 | sbi->s_resuid = option; | |
1364 | break; | |
1365 | case Opt_resgid: | |
1366 | if (match_int(&args[0], &option)) | |
1367 | return 0; | |
1368 | sbi->s_resgid = option; | |
1369 | break; | |
1370 | case Opt_sb: | |
1371 | /* handled by get_sb_block() instead of here */ | |
1372 | /* *sb_block = match_int(&args[0]); */ | |
1373 | break; | |
1374 | case Opt_err_panic: | |
2b2d6d01 TT |
1375 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1376 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1377 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1378 | break; |
1379 | case Opt_err_ro: | |
2b2d6d01 TT |
1380 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1381 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1382 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1383 | break; |
1384 | case Opt_err_cont: | |
2b2d6d01 TT |
1385 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1386 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1387 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1388 | break; |
1389 | case Opt_nouid32: | |
2b2d6d01 | 1390 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1391 | break; |
ac27a0ec | 1392 | case Opt_debug: |
2b2d6d01 | 1393 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1394 | break; |
1395 | case Opt_oldalloc: | |
2b2d6d01 | 1396 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1397 | break; |
1398 | case Opt_orlov: | |
2b2d6d01 | 1399 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1400 | break; |
03010a33 | 1401 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1402 | case Opt_user_xattr: |
2b2d6d01 | 1403 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1404 | break; |
1405 | case Opt_nouser_xattr: | |
2b2d6d01 | 1406 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1407 | break; |
1408 | #else | |
1409 | case Opt_user_xattr: | |
1410 | case Opt_nouser_xattr: | |
b31e1552 | 1411 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1412 | break; |
1413 | #endif | |
03010a33 | 1414 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1415 | case Opt_acl: |
1416 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1417 | break; | |
1418 | case Opt_noacl: | |
1419 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1420 | break; | |
1421 | #else | |
1422 | case Opt_acl: | |
1423 | case Opt_noacl: | |
b31e1552 | 1424 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1425 | break; |
1426 | #endif | |
ac27a0ec DK |
1427 | case Opt_journal_update: |
1428 | /* @@@ FIXME */ | |
1429 | /* Eventually we will want to be able to create | |
1430 | a journal file here. For now, only allow the | |
1431 | user to specify an existing inode to be the | |
1432 | journal file. */ | |
1433 | if (is_remount) { | |
b31e1552 ES |
1434 | ext4_msg(sb, KERN_ERR, |
1435 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1436 | return 0; |
1437 | } | |
2b2d6d01 | 1438 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1439 | break; |
ac27a0ec DK |
1440 | case Opt_journal_dev: |
1441 | if (is_remount) { | |
b31e1552 ES |
1442 | ext4_msg(sb, KERN_ERR, |
1443 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1444 | return 0; |
1445 | } | |
1446 | if (match_int(&args[0], &option)) | |
1447 | return 0; | |
1448 | *journal_devnum = option; | |
1449 | break; | |
818d276c | 1450 | case Opt_journal_checksum: |
d4da6c9c LT |
1451 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
1452 | break; | |
818d276c GS |
1453 | case Opt_journal_async_commit: |
1454 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
d4da6c9c | 1455 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
818d276c | 1456 | break; |
ac27a0ec | 1457 | case Opt_noload: |
2b2d6d01 | 1458 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1459 | break; |
1460 | case Opt_commit: | |
1461 | if (match_int(&args[0], &option)) | |
1462 | return 0; | |
1463 | if (option < 0) | |
1464 | return 0; | |
1465 | if (option == 0) | |
cd02ff0b | 1466 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1467 | sbi->s_commit_interval = HZ * option; |
1468 | break; | |
30773840 TT |
1469 | case Opt_max_batch_time: |
1470 | if (match_int(&args[0], &option)) | |
1471 | return 0; | |
1472 | if (option < 0) | |
1473 | return 0; | |
1474 | if (option == 0) | |
1475 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1476 | sbi->s_max_batch_time = option; | |
1477 | break; | |
1478 | case Opt_min_batch_time: | |
1479 | if (match_int(&args[0], &option)) | |
1480 | return 0; | |
1481 | if (option < 0) | |
1482 | return 0; | |
1483 | sbi->s_min_batch_time = option; | |
1484 | break; | |
ac27a0ec | 1485 | case Opt_data_journal: |
617ba13b | 1486 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1487 | goto datacheck; |
1488 | case Opt_data_ordered: | |
617ba13b | 1489 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1490 | goto datacheck; |
1491 | case Opt_data_writeback: | |
617ba13b | 1492 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1493 | datacheck: |
1494 | if (is_remount) { | |
482a7425 | 1495 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1496 | ext4_msg(sb, KERN_ERR, |
1497 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1498 | return 0; |
1499 | } | |
1500 | } else { | |
482a7425 | 1501 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
ac27a0ec DK |
1502 | sbi->s_mount_opt |= data_opt; |
1503 | } | |
1504 | break; | |
5bf5683a HK |
1505 | case Opt_data_err_abort: |
1506 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1507 | break; | |
1508 | case Opt_data_err_ignore: | |
1509 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1510 | break; | |
ac27a0ec DK |
1511 | #ifdef CONFIG_QUOTA |
1512 | case Opt_usrjquota: | |
56c50f11 | 1513 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1514 | return 0; |
56c50f11 DM |
1515 | break; |
1516 | case Opt_grpjquota: | |
1517 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1518 | return 0; |
ac27a0ec DK |
1519 | break; |
1520 | case Opt_offusrjquota: | |
56c50f11 DM |
1521 | if (!clear_qf_name(sb, USRQUOTA)) |
1522 | return 0; | |
1523 | break; | |
ac27a0ec | 1524 | case Opt_offgrpjquota: |
56c50f11 | 1525 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1526 | return 0; |
ac27a0ec | 1527 | break; |
56c50f11 | 1528 | |
ac27a0ec | 1529 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1530 | qfmt = QFMT_VFS_OLD; |
1531 | goto set_qf_format; | |
ac27a0ec | 1532 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1533 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1534 | goto set_qf_format; |
1535 | case Opt_jqfmt_vfsv1: | |
1536 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1537 | set_qf_format: |
17bd13b3 | 1538 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1539 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1540 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1541 | "journaled quota options when " |
b31e1552 | 1542 | "quota turned on"); |
dfc5d03f JK |
1543 | return 0; |
1544 | } | |
1545 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1546 | break; |
1547 | case Opt_quota: | |
1548 | case Opt_usrquota: | |
1549 | set_opt(sbi->s_mount_opt, QUOTA); | |
1550 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1551 | break; | |
1552 | case Opt_grpquota: | |
1553 | set_opt(sbi->s_mount_opt, QUOTA); | |
1554 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1555 | break; | |
1556 | case Opt_noquota: | |
17bd13b3 | 1557 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1558 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1559 | "options when quota turned on"); | |
ac27a0ec DK |
1560 | return 0; |
1561 | } | |
1562 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1563 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1564 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1565 | break; | |
1566 | #else | |
1567 | case Opt_quota: | |
1568 | case Opt_usrquota: | |
1569 | case Opt_grpquota: | |
b31e1552 ES |
1570 | ext4_msg(sb, KERN_ERR, |
1571 | "quota options not supported"); | |
cd59e7b9 | 1572 | break; |
ac27a0ec DK |
1573 | case Opt_usrjquota: |
1574 | case Opt_grpjquota: | |
1575 | case Opt_offusrjquota: | |
1576 | case Opt_offgrpjquota: | |
1577 | case Opt_jqfmt_vfsold: | |
1578 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1579 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1580 | ext4_msg(sb, KERN_ERR, |
1581 | "journaled quota options not supported"); | |
ac27a0ec DK |
1582 | break; |
1583 | case Opt_noquota: | |
1584 | break; | |
1585 | #endif | |
1586 | case Opt_abort: | |
4ab2f15b | 1587 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1588 | break; |
06705bff TT |
1589 | case Opt_nobarrier: |
1590 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1591 | break; | |
ac27a0ec | 1592 | case Opt_barrier: |
15121c18 ES |
1593 | if (args[0].from) { |
1594 | if (match_int(&args[0], &option)) | |
1595 | return 0; | |
1596 | } else | |
1597 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec DK |
1598 | if (option) |
1599 | set_opt(sbi->s_mount_opt, BARRIER); | |
1600 | else | |
1601 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1602 | break; | |
1603 | case Opt_ignore: | |
1604 | break; | |
1605 | case Opt_resize: | |
1606 | if (!is_remount) { | |
b31e1552 ES |
1607 | ext4_msg(sb, KERN_ERR, |
1608 | "resize option only available " | |
1609 | "for remount"); | |
ac27a0ec DK |
1610 | return 0; |
1611 | } | |
1612 | if (match_int(&args[0], &option) != 0) | |
1613 | return 0; | |
1614 | *n_blocks_count = option; | |
1615 | break; | |
1616 | case Opt_nobh: | |
1617 | set_opt(sbi->s_mount_opt, NOBH); | |
1618 | break; | |
1619 | case Opt_bh: | |
1620 | clear_opt(sbi->s_mount_opt, NOBH); | |
1621 | break; | |
25ec56b5 JNC |
1622 | case Opt_i_version: |
1623 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1624 | sb->s_flags |= MS_I_VERSION; | |
1625 | break; | |
dd919b98 AK |
1626 | case Opt_nodelalloc: |
1627 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1628 | break; | |
c9de560d AT |
1629 | case Opt_stripe: |
1630 | if (match_int(&args[0], &option)) | |
1631 | return 0; | |
1632 | if (option < 0) | |
1633 | return 0; | |
1634 | sbi->s_stripe = option; | |
1635 | break; | |
64769240 AT |
1636 | case Opt_delalloc: |
1637 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1638 | break; | |
6fd058f7 TT |
1639 | case Opt_block_validity: |
1640 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1641 | break; | |
1642 | case Opt_noblock_validity: | |
1643 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1644 | break; | |
240799cd TT |
1645 | case Opt_inode_readahead_blks: |
1646 | if (match_int(&args[0], &option)) | |
1647 | return 0; | |
1648 | if (option < 0 || option > (1 << 30)) | |
1649 | return 0; | |
f7c43950 | 1650 | if (!is_power_of_2(option)) { |
b31e1552 ES |
1651 | ext4_msg(sb, KERN_ERR, |
1652 | "EXT4-fs: inode_readahead_blks" | |
1653 | " must be a power of 2"); | |
3197ebdb TT |
1654 | return 0; |
1655 | } | |
240799cd TT |
1656 | sbi->s_inode_readahead_blks = option; |
1657 | break; | |
b3881f74 TT |
1658 | case Opt_journal_ioprio: |
1659 | if (match_int(&args[0], &option)) | |
1660 | return 0; | |
1661 | if (option < 0 || option > 7) | |
1662 | break; | |
1663 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1664 | option); | |
1665 | break; | |
06705bff TT |
1666 | case Opt_noauto_da_alloc: |
1667 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1668 | break; | |
afd4672d | 1669 | case Opt_auto_da_alloc: |
15121c18 ES |
1670 | if (args[0].from) { |
1671 | if (match_int(&args[0], &option)) | |
1672 | return 0; | |
1673 | } else | |
1674 | option = 1; /* No argument, default to 1 */ | |
afd4672d TT |
1675 | if (option) |
1676 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1677 | else | |
1678 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1679 | break; | |
5328e635 ES |
1680 | case Opt_discard: |
1681 | set_opt(sbi->s_mount_opt, DISCARD); | |
1682 | break; | |
1683 | case Opt_nodiscard: | |
1684 | clear_opt(sbi->s_mount_opt, DISCARD); | |
1685 | break; | |
744692dc JZ |
1686 | case Opt_dioread_nolock: |
1687 | set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1688 | break; | |
1689 | case Opt_dioread_lock: | |
1690 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1691 | break; | |
ac27a0ec | 1692 | default: |
b31e1552 ES |
1693 | ext4_msg(sb, KERN_ERR, |
1694 | "Unrecognized mount option \"%s\" " | |
1695 | "or missing value", p); | |
ac27a0ec DK |
1696 | return 0; |
1697 | } | |
1698 | } | |
1699 | #ifdef CONFIG_QUOTA | |
1700 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1701 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
ac27a0ec DK |
1702 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1703 | ||
482a7425 | 1704 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
ac27a0ec DK |
1705 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1706 | ||
56c50f11 | 1707 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1708 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1709 | "format mixing"); | |
ac27a0ec DK |
1710 | return 0; |
1711 | } | |
1712 | ||
1713 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1714 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1715 | "not specified"); | |
ac27a0ec DK |
1716 | return 0; |
1717 | } | |
1718 | } else { | |
1719 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1720 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1721 | "specified with no journaling " |
b31e1552 | 1722 | "enabled"); |
ac27a0ec DK |
1723 | return 0; |
1724 | } | |
1725 | } | |
1726 | #endif | |
1727 | return 1; | |
1728 | } | |
1729 | ||
617ba13b | 1730 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1731 | int read_only) |
1732 | { | |
617ba13b | 1733 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1734 | int res = 0; |
1735 | ||
617ba13b | 1736 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1737 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1738 | "forcing read-only mode"); | |
ac27a0ec DK |
1739 | res = MS_RDONLY; |
1740 | } | |
1741 | if (read_only) | |
1742 | return res; | |
617ba13b | 1743 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1744 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1745 | "running e2fsck is recommended"); | |
617ba13b | 1746 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1747 | ext4_msg(sb, KERN_WARNING, |
1748 | "warning: mounting fs with errors, " | |
1749 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1750 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1751 | le16_to_cpu(es->s_mnt_count) >= | |
1752 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1753 | ext4_msg(sb, KERN_WARNING, |
1754 | "warning: maximal mount count reached, " | |
1755 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1756 | else if (le32_to_cpu(es->s_checkinterval) && |
1757 | (le32_to_cpu(es->s_lastcheck) + | |
1758 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1759 | ext4_msg(sb, KERN_WARNING, |
1760 | "warning: checktime reached, " | |
1761 | "running e2fsck is recommended"); | |
0b8e58a1 | 1762 | if (!sbi->s_journal) |
0390131b | 1763 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1764 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1765 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1766 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1767 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1768 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1769 | if (sbi->s_journal) |
1770 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1771 | |
e2d67052 | 1772 | ext4_commit_super(sb, 1); |
ac27a0ec | 1773 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1774 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
7f4520cc | 1775 | "bpg=%lu, ipg=%lu, mo=%04x]\n", |
ac27a0ec DK |
1776 | sb->s_blocksize, |
1777 | sbi->s_groups_count, | |
617ba13b MC |
1778 | EXT4_BLOCKS_PER_GROUP(sb), |
1779 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1780 | sbi->s_mount_opt); |
1781 | ||
ac27a0ec DK |
1782 | return res; |
1783 | } | |
1784 | ||
772cb7c8 JS |
1785 | static int ext4_fill_flex_info(struct super_block *sb) |
1786 | { | |
1787 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1788 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1789 | ext4_group_t flex_group_count; |
1790 | ext4_group_t flex_group; | |
1791 | int groups_per_flex = 0; | |
c5ca7c76 | 1792 | size_t size; |
772cb7c8 JS |
1793 | int i; |
1794 | ||
503358ae TT |
1795 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1796 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1797 | ||
1798 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1799 | sbi->s_log_groups_per_flex = 0; |
1800 | return 1; | |
1801 | } | |
1802 | ||
c62a11fd FB |
1803 | /* We allocate both existing and potentially added groups */ |
1804 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1805 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1806 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1807 | size = flex_group_count * sizeof(struct flex_groups); |
1808 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1809 | if (sbi->s_flex_groups == NULL) { | |
1810 | sbi->s_flex_groups = vmalloc(size); | |
1811 | if (sbi->s_flex_groups) | |
1812 | memset(sbi->s_flex_groups, 0, size); | |
1813 | } | |
772cb7c8 | 1814 | if (sbi->s_flex_groups == NULL) { |
b31e1552 ES |
1815 | ext4_msg(sb, KERN_ERR, "not enough memory for " |
1816 | "%u flex groups", flex_group_count); | |
772cb7c8 JS |
1817 | goto failed; |
1818 | } | |
772cb7c8 | 1819 | |
772cb7c8 | 1820 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1821 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1822 | |
1823 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1824 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1825 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1826 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1827 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1828 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1829 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1830 | } |
1831 | ||
1832 | return 1; | |
1833 | failed: | |
1834 | return 0; | |
1835 | } | |
1836 | ||
717d50e4 AD |
1837 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1838 | struct ext4_group_desc *gdp) | |
1839 | { | |
1840 | __u16 crc = 0; | |
1841 | ||
1842 | if (sbi->s_es->s_feature_ro_compat & | |
1843 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1844 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1845 | __le32 le_group = cpu_to_le32(block_group); | |
1846 | ||
1847 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1848 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1849 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1850 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1851 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1852 | if ((sbi->s_es->s_feature_incompat & | |
1853 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1854 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1855 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1856 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1857 | offset); | |
1858 | } | |
1859 | ||
1860 | return cpu_to_le16(crc); | |
1861 | } | |
1862 | ||
1863 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1864 | struct ext4_group_desc *gdp) | |
1865 | { | |
1866 | if ((sbi->s_es->s_feature_ro_compat & | |
1867 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1868 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1869 | return 0; | |
1870 | ||
1871 | return 1; | |
1872 | } | |
1873 | ||
ac27a0ec | 1874 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1875 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1876 | { |
617ba13b MC |
1877 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1878 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1879 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1880 | ext4_fsblk_t block_bitmap; |
1881 | ext4_fsblk_t inode_bitmap; | |
1882 | ext4_fsblk_t inode_table; | |
ce421581 | 1883 | int flexbg_flag = 0; |
fd2d4291 | 1884 | ext4_group_t i; |
ac27a0ec | 1885 | |
ce421581 JS |
1886 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1887 | flexbg_flag = 1; | |
1888 | ||
af5bc92d | 1889 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1890 | |
197cd65a AM |
1891 | for (i = 0; i < sbi->s_groups_count; i++) { |
1892 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1893 | ||
ce421581 | 1894 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1895 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1896 | else |
1897 | last_block = first_block + | |
617ba13b | 1898 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1899 | |
8fadc143 | 1900 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1901 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 1902 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1903 | "Block bitmap for group %u not in group " |
b31e1552 | 1904 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
1905 | return 0; |
1906 | } | |
8fadc143 | 1907 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1908 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 1909 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1910 | "Inode bitmap for group %u not in group " |
b31e1552 | 1911 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
1912 | return 0; |
1913 | } | |
8fadc143 | 1914 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1915 | if (inode_table < first_block || |
2b2d6d01 | 1916 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 1917 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1918 | "Inode table for group %u not in group " |
b31e1552 | 1919 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
1920 | return 0; |
1921 | } | |
955ce5f5 | 1922 | ext4_lock_group(sb, i); |
717d50e4 | 1923 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
1924 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
1925 | "Checksum for group %u failed (%u!=%u)", | |
1926 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
1927 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 1928 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 1929 | ext4_unlock_group(sb, i); |
8a266467 | 1930 | return 0; |
7ee1ec4c | 1931 | } |
717d50e4 | 1932 | } |
955ce5f5 | 1933 | ext4_unlock_group(sb, i); |
ce421581 JS |
1934 | if (!flexbg_flag) |
1935 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1936 | } |
1937 | ||
bd81d8ee | 1938 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 1939 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1940 | return 1; |
1941 | } | |
1942 | ||
617ba13b | 1943 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1944 | * the superblock) which were deleted from all directories, but held open by |
1945 | * a process at the time of a crash. We walk the list and try to delete these | |
1946 | * inodes at recovery time (only with a read-write filesystem). | |
1947 | * | |
1948 | * In order to keep the orphan inode chain consistent during traversal (in | |
1949 | * case of crash during recovery), we link each inode into the superblock | |
1950 | * orphan list_head and handle it the same way as an inode deletion during | |
1951 | * normal operation (which journals the operations for us). | |
1952 | * | |
1953 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1954 | * accidentally point at an in-use or already deleted inode. The worst that | |
1955 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1956 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1957 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1958 | * inode cleanup for us, so we can safely abort without any further action. | |
1959 | */ | |
2b2d6d01 TT |
1960 | static void ext4_orphan_cleanup(struct super_block *sb, |
1961 | struct ext4_super_block *es) | |
ac27a0ec DK |
1962 | { |
1963 | unsigned int s_flags = sb->s_flags; | |
1964 | int nr_orphans = 0, nr_truncates = 0; | |
1965 | #ifdef CONFIG_QUOTA | |
1966 | int i; | |
1967 | #endif | |
1968 | if (!es->s_last_orphan) { | |
1969 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1970 | return; | |
1971 | } | |
1972 | ||
a8f48a95 | 1973 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
1974 | ext4_msg(sb, KERN_ERR, "write access " |
1975 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
1976 | return; |
1977 | } | |
1978 | ||
617ba13b | 1979 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1980 | if (es->s_last_orphan) |
1981 | jbd_debug(1, "Errors on filesystem, " | |
1982 | "clearing orphan list.\n"); | |
1983 | es->s_last_orphan = 0; | |
1984 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1985 | return; | |
1986 | } | |
1987 | ||
1988 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 1989 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
1990 | sb->s_flags &= ~MS_RDONLY; |
1991 | } | |
1992 | #ifdef CONFIG_QUOTA | |
1993 | /* Needed for iput() to work correctly and not trash data */ | |
1994 | sb->s_flags |= MS_ACTIVE; | |
1995 | /* Turn on quotas so that they are updated correctly */ | |
1996 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1997 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1998 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 1999 | if (ret < 0) |
b31e1552 ES |
2000 | ext4_msg(sb, KERN_ERR, |
2001 | "Cannot turn on journaled " | |
2002 | "quota: error %d", ret); | |
ac27a0ec DK |
2003 | } |
2004 | } | |
2005 | #endif | |
2006 | ||
2007 | while (es->s_last_orphan) { | |
2008 | struct inode *inode; | |
2009 | ||
97bd42b9 JB |
2010 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2011 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2012 | es->s_last_orphan = 0; |
2013 | break; | |
2014 | } | |
2015 | ||
617ba13b | 2016 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 2017 | vfs_dq_init(inode); |
ac27a0ec | 2018 | if (inode->i_nlink) { |
b31e1552 ES |
2019 | ext4_msg(sb, KERN_DEBUG, |
2020 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2021 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2022 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2023 | inode->i_ino, inode->i_size); |
617ba13b | 2024 | ext4_truncate(inode); |
ac27a0ec DK |
2025 | nr_truncates++; |
2026 | } else { | |
b31e1552 ES |
2027 | ext4_msg(sb, KERN_DEBUG, |
2028 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2029 | __func__, inode->i_ino); |
ac27a0ec DK |
2030 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2031 | inode->i_ino); | |
2032 | nr_orphans++; | |
2033 | } | |
2034 | iput(inode); /* The delete magic happens here! */ | |
2035 | } | |
2036 | ||
2b2d6d01 | 2037 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2038 | |
2039 | if (nr_orphans) | |
b31e1552 ES |
2040 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2041 | PLURAL(nr_orphans)); | |
ac27a0ec | 2042 | if (nr_truncates) |
b31e1552 ES |
2043 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2044 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2045 | #ifdef CONFIG_QUOTA |
2046 | /* Turn quotas off */ | |
2047 | for (i = 0; i < MAXQUOTAS; i++) { | |
2048 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 2049 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
2050 | } |
2051 | #endif | |
2052 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2053 | } | |
0b8e58a1 | 2054 | |
cd2291a4 ES |
2055 | /* |
2056 | * Maximal extent format file size. | |
2057 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2058 | * extent format containers, within a sector_t, and within i_blocks | |
2059 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2060 | * so that won't be a limiting factor. | |
2061 | * | |
2062 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2063 | */ | |
f287a1a5 | 2064 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2065 | { |
2066 | loff_t res; | |
2067 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2068 | ||
2069 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2070 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2071 | /* |
90c699a9 | 2072 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2073 | * i_block represent total blocks in 512 bytes |
2074 | * 32 == size of vfs inode i_blocks * 8 | |
2075 | */ | |
2076 | upper_limit = (1LL << 32) - 1; | |
2077 | ||
2078 | /* total blocks in file system block size */ | |
2079 | upper_limit >>= (blkbits - 9); | |
2080 | upper_limit <<= blkbits; | |
2081 | } | |
2082 | ||
2083 | /* 32-bit extent-start container, ee_block */ | |
2084 | res = 1LL << 32; | |
2085 | res <<= blkbits; | |
2086 | res -= 1; | |
2087 | ||
2088 | /* Sanity check against vm- & vfs- imposed limits */ | |
2089 | if (res > upper_limit) | |
2090 | res = upper_limit; | |
2091 | ||
2092 | return res; | |
2093 | } | |
ac27a0ec | 2094 | |
ac27a0ec | 2095 | /* |
cd2291a4 | 2096 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2097 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2098 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2099 | */ |
f287a1a5 | 2100 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2101 | { |
617ba13b | 2102 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2103 | int meta_blocks; |
2104 | loff_t upper_limit; | |
0b8e58a1 AD |
2105 | /* This is calculated to be the largest file size for a dense, block |
2106 | * mapped file such that the file's total number of 512-byte sectors, | |
2107 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2108 | * | |
2109 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2110 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2111 | */ |
2112 | ||
f287a1a5 | 2113 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2114 | /* |
90c699a9 | 2115 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2116 | * the inode i_block field represents total file blocks in |
2117 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2118 | */ |
2119 | upper_limit = (1LL << 32) - 1; | |
2120 | ||
2121 | /* total blocks in file system block size */ | |
2122 | upper_limit >>= (bits - 9); | |
2123 | ||
2124 | } else { | |
8180a562 AK |
2125 | /* |
2126 | * We use 48 bit ext4_inode i_blocks | |
2127 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2128 | * represent total number of blocks in | |
2129 | * file system block size | |
2130 | */ | |
0fc1b451 AK |
2131 | upper_limit = (1LL << 48) - 1; |
2132 | ||
0fc1b451 AK |
2133 | } |
2134 | ||
2135 | /* indirect blocks */ | |
2136 | meta_blocks = 1; | |
2137 | /* double indirect blocks */ | |
2138 | meta_blocks += 1 + (1LL << (bits-2)); | |
2139 | /* tripple indirect blocks */ | |
2140 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2141 | ||
2142 | upper_limit -= meta_blocks; | |
2143 | upper_limit <<= bits; | |
ac27a0ec DK |
2144 | |
2145 | res += 1LL << (bits-2); | |
2146 | res += 1LL << (2*(bits-2)); | |
2147 | res += 1LL << (3*(bits-2)); | |
2148 | res <<= bits; | |
2149 | if (res > upper_limit) | |
2150 | res = upper_limit; | |
0fc1b451 AK |
2151 | |
2152 | if (res > MAX_LFS_FILESIZE) | |
2153 | res = MAX_LFS_FILESIZE; | |
2154 | ||
ac27a0ec DK |
2155 | return res; |
2156 | } | |
2157 | ||
617ba13b | 2158 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2159 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2160 | { |
617ba13b | 2161 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2162 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2163 | int has_super = 0; |
2164 | ||
2165 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2166 | ||
617ba13b | 2167 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2168 | nr < first_meta_bg) |
70bbb3e0 | 2169 | return logical_sb_block + nr + 1; |
ac27a0ec | 2170 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2171 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2172 | has_super = 1; |
0b8e58a1 | 2173 | |
617ba13b | 2174 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2175 | } |
2176 | ||
c9de560d AT |
2177 | /** |
2178 | * ext4_get_stripe_size: Get the stripe size. | |
2179 | * @sbi: In memory super block info | |
2180 | * | |
2181 | * If we have specified it via mount option, then | |
2182 | * use the mount option value. If the value specified at mount time is | |
2183 | * greater than the blocks per group use the super block value. | |
2184 | * If the super block value is greater than blocks per group return 0. | |
2185 | * Allocator needs it be less than blocks per group. | |
2186 | * | |
2187 | */ | |
2188 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2189 | { | |
2190 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2191 | unsigned long stripe_width = | |
2192 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2193 | ||
2194 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2195 | return sbi->s_stripe; | |
2196 | ||
2197 | if (stripe_width <= sbi->s_blocks_per_group) | |
2198 | return stripe_width; | |
2199 | ||
2200 | if (stride <= sbi->s_blocks_per_group) | |
2201 | return stride; | |
2202 | ||
2203 | return 0; | |
2204 | } | |
ac27a0ec | 2205 | |
3197ebdb TT |
2206 | /* sysfs supprt */ |
2207 | ||
2208 | struct ext4_attr { | |
2209 | struct attribute attr; | |
2210 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2211 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2212 | const char *, size_t); | |
2213 | int offset; | |
2214 | }; | |
2215 | ||
2216 | static int parse_strtoul(const char *buf, | |
2217 | unsigned long max, unsigned long *value) | |
2218 | { | |
2219 | char *endp; | |
2220 | ||
e7d2860b AGR |
2221 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2222 | endp = skip_spaces(endp); | |
3197ebdb TT |
2223 | if (*endp || *value > max) |
2224 | return -EINVAL; | |
2225 | ||
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2230 | struct ext4_sb_info *sbi, | |
2231 | char *buf) | |
2232 | { | |
2233 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2234 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2235 | } | |
2236 | ||
2237 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2238 | struct ext4_sb_info *sbi, char *buf) | |
2239 | { | |
2240 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2241 | ||
2242 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2243 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2244 | sbi->s_sectors_written_start) >> 1); | |
2245 | } | |
2246 | ||
2247 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2248 | struct ext4_sb_info *sbi, char *buf) | |
2249 | { | |
2250 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2251 | ||
2252 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
a6b43e38 | 2253 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2254 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2255 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2256 | } |
2257 | ||
2258 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2259 | struct ext4_sb_info *sbi, | |
2260 | const char *buf, size_t count) | |
2261 | { | |
2262 | unsigned long t; | |
2263 | ||
2264 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2265 | return -EINVAL; | |
2266 | ||
f7c43950 | 2267 | if (!is_power_of_2(t)) |
3197ebdb TT |
2268 | return -EINVAL; |
2269 | ||
2270 | sbi->s_inode_readahead_blks = t; | |
2271 | return count; | |
2272 | } | |
2273 | ||
2274 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2275 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2276 | { |
2277 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2278 | ||
2279 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2280 | } | |
2281 | ||
2282 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2283 | struct ext4_sb_info *sbi, | |
2284 | const char *buf, size_t count) | |
2285 | { | |
2286 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2287 | unsigned long t; | |
2288 | ||
2289 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2290 | return -EINVAL; | |
2291 | *ui = t; | |
2292 | return count; | |
2293 | } | |
2294 | ||
2295 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2296 | static struct ext4_attr ext4_attr_##_name = { \ | |
2297 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2298 | .show = _show, \ | |
2299 | .store = _store, \ | |
2300 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2301 | } | |
2302 | #define EXT4_ATTR(name, mode, show, store) \ | |
2303 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2304 | ||
2305 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2306 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2307 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2308 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2309 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2310 | ||
2311 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2312 | EXT4_RO_ATTR(session_write_kbytes); | |
2313 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2314 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2315 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2316 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2317 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2318 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2319 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2320 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2321 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2322 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2323 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2324 | |
2325 | static struct attribute *ext4_attrs[] = { | |
2326 | ATTR_LIST(delayed_allocation_blocks), | |
2327 | ATTR_LIST(session_write_kbytes), | |
2328 | ATTR_LIST(lifetime_write_kbytes), | |
2329 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2330 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2331 | ATTR_LIST(mb_stats), |
2332 | ATTR_LIST(mb_max_to_scan), | |
2333 | ATTR_LIST(mb_min_to_scan), | |
2334 | ATTR_LIST(mb_order2_req), | |
2335 | ATTR_LIST(mb_stream_req), | |
2336 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2337 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2338 | NULL, |
2339 | }; | |
2340 | ||
2341 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2342 | struct attribute *attr, char *buf) | |
2343 | { | |
2344 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2345 | s_kobj); | |
2346 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2347 | ||
2348 | return a->show ? a->show(a, sbi, buf) : 0; | |
2349 | } | |
2350 | ||
2351 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2352 | struct attribute *attr, | |
2353 | const char *buf, size_t len) | |
2354 | { | |
2355 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2356 | s_kobj); | |
2357 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2358 | ||
2359 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2360 | } | |
2361 | ||
2362 | static void ext4_sb_release(struct kobject *kobj) | |
2363 | { | |
2364 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2365 | s_kobj); | |
2366 | complete(&sbi->s_kobj_unregister); | |
2367 | } | |
2368 | ||
2369 | ||
2370 | static struct sysfs_ops ext4_attr_ops = { | |
2371 | .show = ext4_attr_show, | |
2372 | .store = ext4_attr_store, | |
2373 | }; | |
2374 | ||
2375 | static struct kobj_type ext4_ktype = { | |
2376 | .default_attrs = ext4_attrs, | |
2377 | .sysfs_ops = &ext4_attr_ops, | |
2378 | .release = ext4_sb_release, | |
2379 | }; | |
2380 | ||
a13fb1a4 ES |
2381 | /* |
2382 | * Check whether this filesystem can be mounted based on | |
2383 | * the features present and the RDONLY/RDWR mount requested. | |
2384 | * Returns 1 if this filesystem can be mounted as requested, | |
2385 | * 0 if it cannot be. | |
2386 | */ | |
2387 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2388 | { | |
2389 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2390 | ext4_msg(sb, KERN_ERR, | |
2391 | "Couldn't mount because of " | |
2392 | "unsupported optional features (%x)", | |
2393 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2394 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2395 | return 0; | |
2396 | } | |
2397 | ||
2398 | if (readonly) | |
2399 | return 1; | |
2400 | ||
2401 | /* Check that feature set is OK for a read-write mount */ | |
2402 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2403 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2404 | "unsupported optional features (%x)", | |
2405 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2406 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2407 | return 0; | |
2408 | } | |
2409 | /* | |
2410 | * Large file size enabled file system can only be mounted | |
2411 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2412 | */ | |
2413 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2414 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2415 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2416 | "cannot be mounted RDWR without " | |
2417 | "CONFIG_LBDAF"); | |
2418 | return 0; | |
2419 | } | |
2420 | } | |
2421 | return 1; | |
2422 | } | |
2423 | ||
2b2d6d01 | 2424 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2425 | __releases(kernel_lock) |
2426 | __acquires(kernel_lock) | |
ac27a0ec | 2427 | { |
2b2d6d01 | 2428 | struct buffer_head *bh; |
617ba13b MC |
2429 | struct ext4_super_block *es = NULL; |
2430 | struct ext4_sb_info *sbi; | |
2431 | ext4_fsblk_t block; | |
2432 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2433 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2434 | unsigned long offset = 0; |
ac27a0ec DK |
2435 | unsigned long journal_devnum = 0; |
2436 | unsigned long def_mount_opts; | |
2437 | struct inode *root; | |
9f6200bb | 2438 | char *cp; |
0390131b | 2439 | const char *descr; |
1d1fe1ee | 2440 | int ret = -EINVAL; |
ac27a0ec | 2441 | int blocksize; |
4ec11028 TT |
2442 | unsigned int db_count; |
2443 | unsigned int i; | |
f287a1a5 | 2444 | int needs_recovery, has_huge_files; |
bd81d8ee | 2445 | __u64 blocks_count; |
833f4077 | 2446 | int err; |
b3881f74 | 2447 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2448 | |
2449 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2450 | if (!sbi) | |
2451 | return -ENOMEM; | |
705895b6 PE |
2452 | |
2453 | sbi->s_blockgroup_lock = | |
2454 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2455 | if (!sbi->s_blockgroup_lock) { | |
2456 | kfree(sbi); | |
2457 | return -ENOMEM; | |
2458 | } | |
ac27a0ec DK |
2459 | sb->s_fs_info = sbi; |
2460 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2461 | sbi->s_resuid = EXT4_DEF_RESUID; |
2462 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2463 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2464 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2465 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2466 | sectors[1]); | |
ac27a0ec DK |
2467 | |
2468 | unlock_kernel(); | |
2469 | ||
9f6200bb TT |
2470 | /* Cleanup superblock name */ |
2471 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2472 | *cp = '!'; | |
2473 | ||
617ba13b | 2474 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2475 | if (!blocksize) { |
b31e1552 | 2476 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
2477 | goto out_fail; |
2478 | } | |
2479 | ||
2480 | /* | |
617ba13b | 2481 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2482 | * block sizes. We need to calculate the offset from buffer start. |
2483 | */ | |
617ba13b | 2484 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2485 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2486 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2487 | } else { |
70bbb3e0 | 2488 | logical_sb_block = sb_block; |
ac27a0ec DK |
2489 | } |
2490 | ||
70bbb3e0 | 2491 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 2492 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
2493 | goto out_fail; |
2494 | } | |
2495 | /* | |
2496 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2497 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2498 | */ |
617ba13b | 2499 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2500 | sbi->s_es = es; |
2501 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2502 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2503 | goto cantfind_ext4; | |
afc32f7e | 2504 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2505 | |
2506 | /* Set defaults before we parse the mount options */ | |
2507 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2508 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2509 | set_opt(sbi->s_mount_opt, DEBUG); |
437ca0fd DM |
2510 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
2511 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
2512 | "2.6.38"); | |
ac27a0ec | 2513 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 2514 | } |
617ba13b | 2515 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2516 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2517 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2518 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2519 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2520 | #endif |
03010a33 | 2521 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2522 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2523 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2524 | #endif |
617ba13b | 2525 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
482a7425 | 2526 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
617ba13b | 2527 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
482a7425 | 2528 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
617ba13b | 2529 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
482a7425 | 2530 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
617ba13b MC |
2531 | |
2532 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2533 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2534 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2535 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2536 | else |
2537 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2538 | |
2539 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2540 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2541 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2542 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2543 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 2544 | |
571640ca | 2545 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2546 | |
dd919b98 AK |
2547 | /* |
2548 | * enable delayed allocation by default | |
2549 | * Use -o nodelalloc to turn it off | |
2550 | */ | |
2551 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2552 | ||
b3881f74 TT |
2553 | if (!parse_options((char *) data, sb, &journal_devnum, |
2554 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2555 | goto failed_mount; |
2556 | ||
2557 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 2558 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2559 | |
617ba13b MC |
2560 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2561 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2562 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2563 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
2564 | ext4_msg(sb, KERN_WARNING, |
2565 | "feature flags set on rev 0 fs, " | |
2566 | "running e2fsck is recommended"); | |
469108ff | 2567 | |
ac27a0ec DK |
2568 | /* |
2569 | * Check feature flags regardless of the revision level, since we | |
2570 | * previously didn't change the revision level when setting the flags, | |
2571 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2572 | */ | |
a13fb1a4 | 2573 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 2574 | goto failed_mount; |
a13fb1a4 | 2575 | |
ac27a0ec DK |
2576 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2577 | ||
617ba13b MC |
2578 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2579 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
2580 | ext4_msg(sb, KERN_ERR, |
2581 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
2582 | goto failed_mount; |
2583 | } | |
2584 | ||
ac27a0ec | 2585 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2586 | /* Validate the filesystem blocksize */ |
2587 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 2588 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 2589 | blocksize); |
ac27a0ec DK |
2590 | goto failed_mount; |
2591 | } | |
2592 | ||
2b2d6d01 | 2593 | brelse(bh); |
70bbb3e0 AM |
2594 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2595 | offset = do_div(logical_sb_block, blocksize); | |
2596 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 2597 | if (!bh) { |
b31e1552 ES |
2598 | ext4_msg(sb, KERN_ERR, |
2599 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
2600 | goto failed_mount; |
2601 | } | |
617ba13b | 2602 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2603 | sbi->s_es = es; |
617ba13b | 2604 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
2605 | ext4_msg(sb, KERN_ERR, |
2606 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
2607 | goto failed_mount; |
2608 | } | |
2609 | } | |
2610 | ||
a13fb1a4 ES |
2611 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2612 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
2613 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2614 | has_huge_files); | |
2615 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2616 | |
617ba13b MC |
2617 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2618 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2619 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2620 | } else { |
2621 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2622 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2623 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2624 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2625 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
2626 | ext4_msg(sb, KERN_ERR, |
2627 | "unsupported inode size: %d", | |
2b2d6d01 | 2628 | sbi->s_inode_size); |
ac27a0ec DK |
2629 | goto failed_mount; |
2630 | } | |
ef7f3835 KS |
2631 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2632 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2633 | } |
0b8e58a1 | 2634 | |
0d1ee42f AR |
2635 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2636 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2637 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2638 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2639 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
2640 | ext4_msg(sb, KERN_ERR, |
2641 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
2642 | sbi->s_desc_size); |
2643 | goto failed_mount; | |
2644 | } | |
2645 | } else | |
2646 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 2647 | |
ac27a0ec | 2648 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2649 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2650 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 2651 | goto cantfind_ext4; |
0b8e58a1 | 2652 | |
617ba13b | 2653 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 2654 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2655 | goto cantfind_ext4; |
ac27a0ec DK |
2656 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2657 | sbi->s_inodes_per_block; | |
0d1ee42f | 2658 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2659 | sbi->s_sbh = bh; |
2660 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2661 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2662 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 2663 | |
2b2d6d01 | 2664 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2665 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2666 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2667 | i = le32_to_cpu(es->s_flags); |
2668 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2669 | sbi->s_hash_unsigned = 3; | |
2670 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2671 | #ifdef __CHAR_UNSIGNED__ | |
2672 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2673 | sbi->s_hash_unsigned = 3; | |
2674 | #else | |
2675 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2676 | #endif | |
2677 | sb->s_dirt = 1; | |
2678 | } | |
ac27a0ec DK |
2679 | |
2680 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
2681 | ext4_msg(sb, KERN_ERR, |
2682 | "#blocks per group too big: %lu", | |
2b2d6d01 | 2683 | sbi->s_blocks_per_group); |
ac27a0ec DK |
2684 | goto failed_mount; |
2685 | } | |
ac27a0ec | 2686 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
2687 | ext4_msg(sb, KERN_ERR, |
2688 | "#inodes per group too big: %lu", | |
2b2d6d01 | 2689 | sbi->s_inodes_per_group); |
ac27a0ec DK |
2690 | goto failed_mount; |
2691 | } | |
2692 | ||
bf43d84b ES |
2693 | /* |
2694 | * Test whether we have more sectors than will fit in sector_t, | |
2695 | * and whether the max offset is addressable by the page cache. | |
2696 | */ | |
2697 | if ((ext4_blocks_count(es) > | |
2698 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || | |
2699 | (ext4_blocks_count(es) > | |
2700 | (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { | |
b31e1552 | 2701 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 2702 | " too large to mount safely on this system"); |
ac27a0ec | 2703 | if (sizeof(sector_t) < 8) |
90c699a9 | 2704 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
bf43d84b | 2705 | ret = -EFBIG; |
ac27a0ec DK |
2706 | goto failed_mount; |
2707 | } | |
2708 | ||
617ba13b MC |
2709 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2710 | goto cantfind_ext4; | |
e7c95593 | 2711 | |
0f2ddca6 FTN |
2712 | /* check blocks count against device size */ |
2713 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2714 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
2715 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
2716 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
2717 | ext4_blocks_count(es), blocks_count); |
2718 | goto failed_mount; | |
2719 | } | |
2720 | ||
0b8e58a1 AD |
2721 | /* |
2722 | * It makes no sense for the first data block to be beyond the end | |
2723 | * of the filesystem. | |
2724 | */ | |
2725 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
2726 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
2727 | "block %u is beyond end of filesystem (%llu)", | |
2728 | le32_to_cpu(es->s_first_data_block), | |
2729 | ext4_blocks_count(es)); | |
e7c95593 ES |
2730 | goto failed_mount; |
2731 | } | |
bd81d8ee LV |
2732 | blocks_count = (ext4_blocks_count(es) - |
2733 | le32_to_cpu(es->s_first_data_block) + | |
2734 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2735 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 2736 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 2737 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 2738 | "(block count %llu, first data block %u, " |
b31e1552 | 2739 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
2740 | ext4_blocks_count(es), |
2741 | le32_to_cpu(es->s_first_data_block), | |
2742 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2743 | goto failed_mount; | |
2744 | } | |
bd81d8ee | 2745 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
2746 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
2747 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
2748 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2749 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2750 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2751 | GFP_KERNEL); |
2752 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 2753 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
2754 | goto failed_mount; |
2755 | } | |
2756 | ||
3244fcb1 | 2757 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2758 | if (ext4_proc_root) |
2759 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2760 | #endif |
240799cd | 2761 | |
705895b6 | 2762 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2763 | |
2764 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2765 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2766 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2767 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
2768 | ext4_msg(sb, KERN_ERR, |
2769 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
2770 | db_count = i; |
2771 | goto failed_mount2; | |
2772 | } | |
2773 | } | |
2b2d6d01 | 2774 | if (!ext4_check_descriptors(sb)) { |
b31e1552 | 2775 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
2776 | goto failed_mount2; |
2777 | } | |
772cb7c8 JS |
2778 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2779 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
2780 | ext4_msg(sb, KERN_ERR, |
2781 | "unable to initialize " | |
2782 | "flex_bg meta info!"); | |
772cb7c8 JS |
2783 | goto failed_mount2; |
2784 | } | |
2785 | ||
ac27a0ec DK |
2786 | sbi->s_gdb_count = db_count; |
2787 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2788 | spin_lock_init(&sbi->s_next_gen_lock); | |
2789 | ||
833f4077 PZ |
2790 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2791 | ext4_count_free_blocks(sb)); | |
2792 | if (!err) { | |
2793 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2794 | ext4_count_free_inodes(sb)); | |
2795 | } | |
2796 | if (!err) { | |
2797 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2798 | ext4_count_dirs(sb)); | |
2799 | } | |
6bc6e63f AK |
2800 | if (!err) { |
2801 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2802 | } | |
833f4077 | 2803 | if (err) { |
b31e1552 | 2804 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
833f4077 PZ |
2805 | goto failed_mount3; |
2806 | } | |
ac27a0ec | 2807 | |
c9de560d | 2808 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 2809 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 2810 | |
ac27a0ec DK |
2811 | /* |
2812 | * set up enough so that it can read an inode | |
2813 | */ | |
9ca92389 TT |
2814 | if (!test_opt(sb, NOLOAD) && |
2815 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
2816 | sb->s_op = &ext4_sops; | |
2817 | else | |
2818 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
2819 | sb->s_export_op = &ext4_export_ops; |
2820 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2821 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2822 | sb->s_qcop = &ext4_qctl_operations; |
2823 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2824 | #endif |
2825 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 2826 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 2827 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
2828 | |
2829 | sb->s_root = NULL; | |
2830 | ||
2831 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2832 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2833 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2834 | |
2835 | /* | |
2836 | * The first inode we look at is the journal inode. Don't try | |
2837 | * root first: it may be modified in the journal! | |
2838 | */ | |
2839 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2840 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2841 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2842 | goto failed_mount3; |
0390131b FM |
2843 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2844 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
2845 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
2846 | "suppressed and not mounted read-only"); | |
744692dc | 2847 | goto failed_mount_wq; |
ac27a0ec | 2848 | } else { |
0390131b FM |
2849 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2850 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2851 | sbi->s_journal = NULL; | |
2852 | needs_recovery = 0; | |
2853 | goto no_journal; | |
ac27a0ec DK |
2854 | } |
2855 | ||
eb40a09c JS |
2856 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2857 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2858 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 2859 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 2860 | goto failed_mount_wq; |
eb40a09c JS |
2861 | } |
2862 | ||
d4da6c9c LT |
2863 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2864 | jbd2_journal_set_features(sbi->s_journal, | |
2865 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 2866 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
2867 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
2868 | jbd2_journal_set_features(sbi->s_journal, | |
2869 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
2870 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
2871 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
2872 | } else { |
2873 | jbd2_journal_clear_features(sbi->s_journal, | |
2874 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2875 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2876 | } | |
818d276c | 2877 | |
ac27a0ec DK |
2878 | /* We have now updated the journal if required, so we can |
2879 | * validate the data journaling mode. */ | |
2880 | switch (test_opt(sb, DATA_FLAGS)) { | |
2881 | case 0: | |
2882 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2883 | * capabilities: ORDERED_DATA if the journal can |
2884 | * cope, else JOURNAL_DATA | |
2885 | */ | |
dab291af MC |
2886 | if (jbd2_journal_check_available_features |
2887 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2888 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2889 | else | |
2890 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2891 | break; | |
2892 | ||
617ba13b MC |
2893 | case EXT4_MOUNT_ORDERED_DATA: |
2894 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2895 | if (!jbd2_journal_check_available_features |
2896 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
2897 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
2898 | "requested data journaling mode"); | |
744692dc | 2899 | goto failed_mount_wq; |
ac27a0ec DK |
2900 | } |
2901 | default: | |
2902 | break; | |
2903 | } | |
b3881f74 | 2904 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2905 | |
0390131b | 2906 | no_journal: |
ac27a0ec | 2907 | if (test_opt(sb, NOBH)) { |
617ba13b | 2908 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
b31e1552 ES |
2909 | ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " |
2910 | "its supported only with writeback mode"); | |
ac27a0ec DK |
2911 | clear_opt(sbi->s_mount_opt, NOBH); |
2912 | } | |
744692dc JZ |
2913 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
2914 | ext4_msg(sb, KERN_WARNING, "dioread_nolock option is " | |
2915 | "not supported with nobh mode"); | |
2916 | goto failed_mount_wq; | |
2917 | } | |
ac27a0ec | 2918 | } |
4c0425ff MC |
2919 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
2920 | if (!EXT4_SB(sb)->dio_unwritten_wq) { | |
2921 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
2922 | goto failed_mount_wq; | |
2923 | } | |
2924 | ||
ac27a0ec | 2925 | /* |
dab291af | 2926 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2927 | * so we can safely mount the rest of the filesystem now. |
2928 | */ | |
2929 | ||
1d1fe1ee DH |
2930 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2931 | if (IS_ERR(root)) { | |
b31e1552 | 2932 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 2933 | ret = PTR_ERR(root); |
ac27a0ec DK |
2934 | goto failed_mount4; |
2935 | } | |
2936 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2937 | iput(root); |
b31e1552 | 2938 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
2939 | goto failed_mount4; |
2940 | } | |
1d1fe1ee DH |
2941 | sb->s_root = d_alloc_root(root); |
2942 | if (!sb->s_root) { | |
b31e1552 | 2943 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
2944 | iput(root); |
2945 | ret = -ENOMEM; | |
2946 | goto failed_mount4; | |
2947 | } | |
ac27a0ec | 2948 | |
2b2d6d01 | 2949 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2950 | |
2951 | /* determine the minimum size of new large inodes, if present */ | |
2952 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2953 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2954 | EXT4_GOOD_OLD_INODE_SIZE; | |
2955 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2956 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2957 | if (sbi->s_want_extra_isize < | |
2958 | le16_to_cpu(es->s_want_extra_isize)) | |
2959 | sbi->s_want_extra_isize = | |
2960 | le16_to_cpu(es->s_want_extra_isize); | |
2961 | if (sbi->s_want_extra_isize < | |
2962 | le16_to_cpu(es->s_min_extra_isize)) | |
2963 | sbi->s_want_extra_isize = | |
2964 | le16_to_cpu(es->s_min_extra_isize); | |
2965 | } | |
2966 | } | |
2967 | /* Check if enough inode space is available */ | |
2968 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2969 | sbi->s_inode_size) { | |
2970 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2971 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
2972 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
2973 | "available"); | |
ef7f3835 KS |
2974 | } |
2975 | ||
90576c0b TT |
2976 | if (test_opt(sb, DELALLOC) && |
2977 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
2978 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
2979 | "requested data journaling mode"); | |
c2774d84 | 2980 | clear_opt(sbi->s_mount_opt, DELALLOC); |
90576c0b | 2981 | } |
744692dc JZ |
2982 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
2983 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
2984 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
2985 | "option - requested data journaling mode"); | |
2986 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
2987 | } | |
2988 | if (sb->s_blocksize < PAGE_SIZE) { | |
2989 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
2990 | "option - block size is too small"); | |
2991 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
2992 | } | |
2993 | } | |
c2774d84 | 2994 | |
6fd058f7 TT |
2995 | err = ext4_setup_system_zone(sb); |
2996 | if (err) { | |
b31e1552 ES |
2997 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
2998 | "zone (%d)\n", err); | |
6fd058f7 TT |
2999 | goto failed_mount4; |
3000 | } | |
3001 | ||
c2774d84 AK |
3002 | ext4_ext_init(sb); |
3003 | err = ext4_mb_init(sb, needs_recovery); | |
3004 | if (err) { | |
b31e1552 ES |
3005 | ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", |
3006 | err); | |
c2774d84 AK |
3007 | goto failed_mount4; |
3008 | } | |
3009 | ||
3197ebdb TT |
3010 | sbi->s_kobj.kset = ext4_kset; |
3011 | init_completion(&sbi->s_kobj_unregister); | |
3012 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3013 | "%s", sb->s_id); | |
3014 | if (err) { | |
3015 | ext4_mb_release(sb); | |
3016 | ext4_ext_release(sb); | |
3017 | goto failed_mount4; | |
3018 | }; | |
3019 | ||
617ba13b MC |
3020 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3021 | ext4_orphan_cleanup(sb, es); | |
3022 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3023 | if (needs_recovery) { |
b31e1552 | 3024 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3025 | ext4_mark_recovery_complete(sb, es); |
3026 | } | |
3027 | if (EXT4_SB(sb)->s_journal) { | |
3028 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3029 | descr = " journalled data mode"; | |
3030 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3031 | descr = " ordered data mode"; | |
3032 | else | |
3033 | descr = " writeback data mode"; | |
3034 | } else | |
3035 | descr = "out journal"; | |
3036 | ||
b31e1552 | 3037 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); |
ac27a0ec DK |
3038 | |
3039 | lock_kernel(); | |
3040 | return 0; | |
3041 | ||
617ba13b | 3042 | cantfind_ext4: |
ac27a0ec | 3043 | if (!silent) |
b31e1552 | 3044 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3045 | goto failed_mount; |
3046 | ||
3047 | failed_mount4: | |
b31e1552 | 3048 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3049 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3050 | failed_mount_wq: | |
6fd058f7 | 3051 | ext4_release_system_zone(sb); |
0390131b FM |
3052 | if (sbi->s_journal) { |
3053 | jbd2_journal_destroy(sbi->s_journal); | |
3054 | sbi->s_journal = NULL; | |
3055 | } | |
ac27a0ec | 3056 | failed_mount3: |
c5ca7c76 TT |
3057 | if (sbi->s_flex_groups) { |
3058 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3059 | vfree(sbi->s_flex_groups); | |
3060 | else | |
3061 | kfree(sbi->s_flex_groups); | |
3062 | } | |
ac27a0ec DK |
3063 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3064 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3065 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 3066 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
3067 | failed_mount2: |
3068 | for (i = 0; i < db_count; i++) | |
3069 | brelse(sbi->s_group_desc[i]); | |
3070 | kfree(sbi->s_group_desc); | |
3071 | failed_mount: | |
240799cd | 3072 | if (sbi->s_proc) { |
9f6200bb | 3073 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3074 | } |
ac27a0ec DK |
3075 | #ifdef CONFIG_QUOTA |
3076 | for (i = 0; i < MAXQUOTAS; i++) | |
3077 | kfree(sbi->s_qf_names[i]); | |
3078 | #endif | |
617ba13b | 3079 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3080 | brelse(bh); |
3081 | out_fail: | |
3082 | sb->s_fs_info = NULL; | |
f6830165 | 3083 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3084 | kfree(sbi); |
3085 | lock_kernel(); | |
1d1fe1ee | 3086 | return ret; |
ac27a0ec DK |
3087 | } |
3088 | ||
3089 | /* | |
3090 | * Setup any per-fs journal parameters now. We'll do this both on | |
3091 | * initial mount, once the journal has been initialised but before we've | |
3092 | * done any recovery; and again on any subsequent remount. | |
3093 | */ | |
617ba13b | 3094 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3095 | { |
617ba13b | 3096 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3097 | |
30773840 TT |
3098 | journal->j_commit_interval = sbi->s_commit_interval; |
3099 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3100 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3101 | |
3102 | spin_lock(&journal->j_state_lock); | |
3103 | if (test_opt(sb, BARRIER)) | |
dab291af | 3104 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3105 | else |
dab291af | 3106 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3107 | if (test_opt(sb, DATA_ERR_ABORT)) |
3108 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3109 | else | |
3110 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
3111 | spin_unlock(&journal->j_state_lock); |
3112 | } | |
3113 | ||
617ba13b | 3114 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3115 | unsigned int journal_inum) |
3116 | { | |
3117 | struct inode *journal_inode; | |
3118 | journal_t *journal; | |
3119 | ||
0390131b FM |
3120 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3121 | ||
ac27a0ec DK |
3122 | /* First, test for the existence of a valid inode on disk. Bad |
3123 | * things happen if we iget() an unused inode, as the subsequent | |
3124 | * iput() will try to delete it. */ | |
3125 | ||
1d1fe1ee DH |
3126 | journal_inode = ext4_iget(sb, journal_inum); |
3127 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3128 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3129 | return NULL; |
3130 | } | |
3131 | if (!journal_inode->i_nlink) { | |
3132 | make_bad_inode(journal_inode); | |
3133 | iput(journal_inode); | |
b31e1552 | 3134 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3135 | return NULL; |
3136 | } | |
3137 | ||
e5f8eab8 | 3138 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3139 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3140 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3141 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3142 | iput(journal_inode); |
3143 | return NULL; | |
3144 | } | |
3145 | ||
dab291af | 3146 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3147 | if (!journal) { |
b31e1552 | 3148 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3149 | iput(journal_inode); |
3150 | return NULL; | |
3151 | } | |
3152 | journal->j_private = sb; | |
617ba13b | 3153 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3154 | return journal; |
3155 | } | |
3156 | ||
617ba13b | 3157 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3158 | dev_t j_dev) |
3159 | { | |
2b2d6d01 | 3160 | struct buffer_head *bh; |
ac27a0ec | 3161 | journal_t *journal; |
617ba13b MC |
3162 | ext4_fsblk_t start; |
3163 | ext4_fsblk_t len; | |
ac27a0ec | 3164 | int hblock, blocksize; |
617ba13b | 3165 | ext4_fsblk_t sb_block; |
ac27a0ec | 3166 | unsigned long offset; |
2b2d6d01 | 3167 | struct ext4_super_block *es; |
ac27a0ec DK |
3168 | struct block_device *bdev; |
3169 | ||
0390131b FM |
3170 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3171 | ||
b31e1552 | 3172 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3173 | if (bdev == NULL) |
3174 | return NULL; | |
3175 | ||
3176 | if (bd_claim(bdev, sb)) { | |
b31e1552 ES |
3177 | ext4_msg(sb, KERN_ERR, |
3178 | "failed to claim external journal device"); | |
9a1c3542 | 3179 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3180 | return NULL; |
3181 | } | |
3182 | ||
3183 | blocksize = sb->s_blocksize; | |
e1defc4f | 3184 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3185 | if (blocksize < hblock) { |
b31e1552 ES |
3186 | ext4_msg(sb, KERN_ERR, |
3187 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3188 | goto out_bdev; |
3189 | } | |
3190 | ||
617ba13b MC |
3191 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3192 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3193 | set_blocksize(bdev, blocksize); |
3194 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3195 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3196 | "external journal"); | |
ac27a0ec DK |
3197 | goto out_bdev; |
3198 | } | |
3199 | ||
617ba13b MC |
3200 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3201 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3202 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3203 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3204 | ext4_msg(sb, KERN_ERR, "external journal has " |
3205 | "bad superblock"); | |
ac27a0ec DK |
3206 | brelse(bh); |
3207 | goto out_bdev; | |
3208 | } | |
3209 | ||
617ba13b | 3210 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3211 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3212 | brelse(bh); |
3213 | goto out_bdev; | |
3214 | } | |
3215 | ||
bd81d8ee | 3216 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3217 | start = sb_block + 1; |
3218 | brelse(bh); /* we're done with the superblock */ | |
3219 | ||
dab291af | 3220 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3221 | start, len, blocksize); |
3222 | if (!journal) { | |
b31e1552 | 3223 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3224 | goto out_bdev; |
3225 | } | |
3226 | journal->j_private = sb; | |
3227 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3228 | wait_on_buffer(journal->j_sb_buffer); | |
3229 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3230 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3231 | goto out_journal; |
3232 | } | |
3233 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3234 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3235 | "user (unsupported) - %d", | |
ac27a0ec DK |
3236 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3237 | goto out_journal; | |
3238 | } | |
617ba13b MC |
3239 | EXT4_SB(sb)->journal_bdev = bdev; |
3240 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3241 | return journal; |
0b8e58a1 | 3242 | |
ac27a0ec | 3243 | out_journal: |
dab291af | 3244 | jbd2_journal_destroy(journal); |
ac27a0ec | 3245 | out_bdev: |
617ba13b | 3246 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3247 | return NULL; |
3248 | } | |
3249 | ||
617ba13b MC |
3250 | static int ext4_load_journal(struct super_block *sb, |
3251 | struct ext4_super_block *es, | |
ac27a0ec DK |
3252 | unsigned long journal_devnum) |
3253 | { | |
3254 | journal_t *journal; | |
3255 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3256 | dev_t journal_dev; | |
3257 | int err = 0; | |
3258 | int really_read_only; | |
3259 | ||
0390131b FM |
3260 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3261 | ||
ac27a0ec DK |
3262 | if (journal_devnum && |
3263 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3264 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3265 | "numbers have changed"); | |
ac27a0ec DK |
3266 | journal_dev = new_decode_dev(journal_devnum); |
3267 | } else | |
3268 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3269 | ||
3270 | really_read_only = bdev_read_only(sb->s_bdev); | |
3271 | ||
3272 | /* | |
3273 | * Are we loading a blank journal or performing recovery after a | |
3274 | * crash? For recovery, we need to check in advance whether we | |
3275 | * can get read-write access to the device. | |
3276 | */ | |
617ba13b | 3277 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3278 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3279 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3280 | "required on readonly filesystem"); | |
ac27a0ec | 3281 | if (really_read_only) { |
b31e1552 ES |
3282 | ext4_msg(sb, KERN_ERR, "write access " |
3283 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3284 | return -EROFS; |
3285 | } | |
b31e1552 ES |
3286 | ext4_msg(sb, KERN_INFO, "write access will " |
3287 | "be enabled during recovery"); | |
ac27a0ec DK |
3288 | } |
3289 | } | |
3290 | ||
3291 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3292 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3293 | "and inode journals!"); | |
ac27a0ec DK |
3294 | return -EINVAL; |
3295 | } | |
3296 | ||
3297 | if (journal_inum) { | |
617ba13b | 3298 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3299 | return -EINVAL; |
3300 | } else { | |
617ba13b | 3301 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3302 | return -EINVAL; |
3303 | } | |
3304 | ||
90576c0b | 3305 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3306 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3307 | |
ac27a0ec | 3308 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3309 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3310 | if (err) { |
b31e1552 | 3311 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3312 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3313 | return err; |
3314 | } | |
3315 | } | |
3316 | ||
617ba13b | 3317 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3318 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3319 | if (!err) |
dab291af | 3320 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3321 | |
3322 | if (err) { | |
b31e1552 | 3323 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3324 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3325 | return err; |
3326 | } | |
3327 | ||
617ba13b MC |
3328 | EXT4_SB(sb)->s_journal = journal; |
3329 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3330 | |
3331 | if (journal_devnum && | |
3332 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3333 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3334 | |
3335 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3336 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3337 | } |
3338 | ||
3339 | return 0; | |
3340 | } | |
3341 | ||
e2d67052 | 3342 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3343 | { |
e2d67052 | 3344 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3345 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3346 | int error = 0; |
ac27a0ec DK |
3347 | |
3348 | if (!sbh) | |
c4be0c1d | 3349 | return error; |
914258bf TT |
3350 | if (buffer_write_io_error(sbh)) { |
3351 | /* | |
3352 | * Oh, dear. A previous attempt to write the | |
3353 | * superblock failed. This could happen because the | |
3354 | * USB device was yanked out. Or it could happen to | |
3355 | * be a transient write error and maybe the block will | |
3356 | * be remapped. Nothing we can do but to retry the | |
3357 | * write and hope for the best. | |
3358 | */ | |
b31e1552 ES |
3359 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3360 | "superblock detected"); | |
914258bf TT |
3361 | clear_buffer_write_io_error(sbh); |
3362 | set_buffer_uptodate(sbh); | |
3363 | } | |
71290b36 TT |
3364 | /* |
3365 | * If the file system is mounted read-only, don't update the | |
3366 | * superblock write time. This avoids updating the superblock | |
3367 | * write time when we are mounting the root file system | |
3368 | * read/only but we need to replay the journal; at that point, | |
3369 | * for people who are east of GMT and who make their clock | |
3370 | * tick in localtime for Windows bug-for-bug compatibility, | |
3371 | * the clock is set in the future, and this will cause e2fsck | |
3372 | * to complain and force a full file system check. | |
3373 | */ | |
3374 | if (!(sb->s_flags & MS_RDONLY)) | |
3375 | es->s_wtime = cpu_to_le32(get_seconds()); | |
afc32f7e TT |
3376 | es->s_kbytes_written = |
3377 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3378 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3379 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3380 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3381 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3382 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3383 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3384 | sb->s_dirt = 0; |
ac27a0ec DK |
3385 | BUFFER_TRACE(sbh, "marking dirty"); |
3386 | mark_buffer_dirty(sbh); | |
914258bf | 3387 | if (sync) { |
c4be0c1d TS |
3388 | error = sync_dirty_buffer(sbh); |
3389 | if (error) | |
3390 | return error; | |
3391 | ||
3392 | error = buffer_write_io_error(sbh); | |
3393 | if (error) { | |
b31e1552 ES |
3394 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
3395 | "superblock"); | |
914258bf TT |
3396 | clear_buffer_write_io_error(sbh); |
3397 | set_buffer_uptodate(sbh); | |
3398 | } | |
3399 | } | |
c4be0c1d | 3400 | return error; |
ac27a0ec DK |
3401 | } |
3402 | ||
ac27a0ec DK |
3403 | /* |
3404 | * Have we just finished recovery? If so, and if we are mounting (or | |
3405 | * remounting) the filesystem readonly, then we will end up with a | |
3406 | * consistent fs on disk. Record that fact. | |
3407 | */ | |
2b2d6d01 TT |
3408 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3409 | struct ext4_super_block *es) | |
ac27a0ec | 3410 | { |
617ba13b | 3411 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3412 | |
0390131b FM |
3413 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3414 | BUG_ON(journal != NULL); | |
3415 | return; | |
3416 | } | |
dab291af | 3417 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3418 | if (jbd2_journal_flush(journal) < 0) |
3419 | goto out; | |
3420 | ||
617ba13b | 3421 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3422 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3423 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 3424 | ext4_commit_super(sb, 1); |
ac27a0ec | 3425 | } |
7ffe1ea8 HK |
3426 | |
3427 | out: | |
dab291af | 3428 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3429 | } |
3430 | ||
3431 | /* | |
3432 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3433 | * has recorded an error from a previous lifetime, move that error to the | |
3434 | * main filesystem now. | |
3435 | */ | |
2b2d6d01 TT |
3436 | static void ext4_clear_journal_err(struct super_block *sb, |
3437 | struct ext4_super_block *es) | |
ac27a0ec DK |
3438 | { |
3439 | journal_t *journal; | |
3440 | int j_errno; | |
3441 | const char *errstr; | |
3442 | ||
0390131b FM |
3443 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3444 | ||
617ba13b | 3445 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3446 | |
3447 | /* | |
3448 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3449 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3450 | */ |
3451 | ||
dab291af | 3452 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3453 | if (j_errno) { |
3454 | char nbuf[16]; | |
3455 | ||
617ba13b | 3456 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 3457 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 3458 | "from previous mount: %s", errstr); |
12062ddd | 3459 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 3460 | |
617ba13b MC |
3461 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3462 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 3463 | ext4_commit_super(sb, 1); |
ac27a0ec | 3464 | |
dab291af | 3465 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3466 | } |
3467 | } | |
3468 | ||
3469 | /* | |
3470 | * Force the running and committing transactions to commit, | |
3471 | * and wait on the commit. | |
3472 | */ | |
617ba13b | 3473 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3474 | { |
3475 | journal_t *journal; | |
0390131b | 3476 | int ret = 0; |
ac27a0ec DK |
3477 | |
3478 | if (sb->s_flags & MS_RDONLY) | |
3479 | return 0; | |
3480 | ||
617ba13b | 3481 | journal = EXT4_SB(sb)->s_journal; |
7234ab2a | 3482 | if (journal) |
0390131b | 3483 | ret = ext4_journal_force_commit(journal); |
0390131b | 3484 | |
ac27a0ec DK |
3485 | return ret; |
3486 | } | |
3487 | ||
2b2d6d01 | 3488 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3489 | { |
ebc1ac16 | 3490 | lock_super(sb); |
9ca92389 | 3491 | ext4_commit_super(sb, 1); |
ebc1ac16 | 3492 | unlock_super(sb); |
ac27a0ec DK |
3493 | } |
3494 | ||
617ba13b | 3495 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3496 | { |
14ce0cb4 | 3497 | int ret = 0; |
9eddacf9 | 3498 | tid_t target; |
8d5d02e6 | 3499 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3500 | |
9bffad1e | 3501 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
3502 | flush_workqueue(sbi->dio_unwritten_wq); |
3503 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 3504 | if (wait) |
8d5d02e6 | 3505 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 3506 | } |
14ce0cb4 | 3507 | return ret; |
ac27a0ec DK |
3508 | } |
3509 | ||
3510 | /* | |
3511 | * LVM calls this function before a (read-only) snapshot is created. This | |
3512 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3513 | */ | |
c4be0c1d | 3514 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3515 | { |
c4be0c1d TS |
3516 | int error = 0; |
3517 | journal_t *journal; | |
ac27a0ec | 3518 | |
9ca92389 TT |
3519 | if (sb->s_flags & MS_RDONLY) |
3520 | return 0; | |
ac27a0ec | 3521 | |
9ca92389 | 3522 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 3523 | |
9ca92389 TT |
3524 | /* Now we set up the journal barrier. */ |
3525 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 3526 | |
9ca92389 TT |
3527 | /* |
3528 | * Don't clear the needs_recovery flag if we failed to flush | |
3529 | * the journal. | |
3530 | */ | |
3531 | error = jbd2_journal_flush(journal); | |
3532 | if (error < 0) { | |
3533 | out: | |
3534 | jbd2_journal_unlock_updates(journal); | |
3535 | return error; | |
ac27a0ec | 3536 | } |
9ca92389 TT |
3537 | |
3538 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
3539 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3540 | error = ext4_commit_super(sb, 1); | |
3541 | if (error) | |
3542 | goto out; | |
c4be0c1d | 3543 | return 0; |
ac27a0ec DK |
3544 | } |
3545 | ||
3546 | /* | |
3547 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3548 | * flag here, even though the filesystem is not technically dirty yet. | |
3549 | */ | |
c4be0c1d | 3550 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3551 | { |
9ca92389 TT |
3552 | if (sb->s_flags & MS_RDONLY) |
3553 | return 0; | |
3554 | ||
3555 | lock_super(sb); | |
3556 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
3557 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3558 | ext4_commit_super(sb, 1); | |
3559 | unlock_super(sb); | |
3560 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
c4be0c1d | 3561 | return 0; |
ac27a0ec DK |
3562 | } |
3563 | ||
2b2d6d01 | 3564 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3565 | { |
2b2d6d01 | 3566 | struct ext4_super_block *es; |
617ba13b MC |
3567 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3568 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3569 | unsigned long old_sb_flags; |
617ba13b | 3570 | struct ext4_mount_options old_opts; |
8a266467 | 3571 | ext4_group_t g; |
b3881f74 | 3572 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3573 | int err; |
3574 | #ifdef CONFIG_QUOTA | |
3575 | int i; | |
3576 | #endif | |
3577 | ||
337eb00a AIB |
3578 | lock_kernel(); |
3579 | ||
ac27a0ec | 3580 | /* Store the original options */ |
bbd6851a | 3581 | lock_super(sb); |
ac27a0ec DK |
3582 | old_sb_flags = sb->s_flags; |
3583 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3584 | old_opts.s_resuid = sbi->s_resuid; | |
3585 | old_opts.s_resgid = sbi->s_resgid; | |
3586 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3587 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3588 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3589 | #ifdef CONFIG_QUOTA |
3590 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3591 | for (i = 0; i < MAXQUOTAS; i++) | |
3592 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3593 | #endif | |
b3881f74 TT |
3594 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3595 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3596 | |
3597 | /* | |
3598 | * Allow the "check" option to be passed as a remount option. | |
3599 | */ | |
b3881f74 TT |
3600 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3601 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3602 | err = -EINVAL; |
3603 | goto restore_opts; | |
3604 | } | |
3605 | ||
4ab2f15b | 3606 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
46e665e9 | 3607 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3608 | |
3609 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3610 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3611 | |
3612 | es = sbi->s_es; | |
3613 | ||
b3881f74 | 3614 | if (sbi->s_journal) { |
0390131b | 3615 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3616 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3617 | } | |
ac27a0ec DK |
3618 | |
3619 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3620 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 3621 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
3622 | err = -EROFS; |
3623 | goto restore_opts; | |
3624 | } | |
3625 | ||
3626 | if (*flags & MS_RDONLY) { | |
3627 | /* | |
3628 | * First of all, the unconditional stuff we have to do | |
3629 | * to disable replay of the journal when we next remount | |
3630 | */ | |
3631 | sb->s_flags |= MS_RDONLY; | |
3632 | ||
3633 | /* | |
3634 | * OK, test if we are remounting a valid rw partition | |
3635 | * readonly, and if so set the rdonly flag and then | |
3636 | * mark the partition as valid again. | |
3637 | */ | |
617ba13b MC |
3638 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3639 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3640 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3641 | ||
a63c9eb2 | 3642 | if (sbi->s_journal) |
0390131b | 3643 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 3644 | } else { |
a13fb1a4 ES |
3645 | /* Make sure we can mount this feature set readwrite */ |
3646 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
3647 | err = -EROFS; |
3648 | goto restore_opts; | |
3649 | } | |
8a266467 TT |
3650 | /* |
3651 | * Make sure the group descriptor checksums | |
0b8e58a1 | 3652 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
3653 | */ |
3654 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3655 | struct ext4_group_desc *gdp = | |
3656 | ext4_get_group_desc(sb, g, NULL); | |
3657 | ||
3658 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
3659 | ext4_msg(sb, KERN_ERR, |
3660 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
3661 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3662 | le16_to_cpu(gdp->bg_checksum)); | |
3663 | err = -EINVAL; | |
3664 | goto restore_opts; | |
3665 | } | |
3666 | } | |
3667 | ||
ead6596b ES |
3668 | /* |
3669 | * If we have an unprocessed orphan list hanging | |
3670 | * around from a previously readonly bdev mount, | |
3671 | * require a full umount/remount for now. | |
3672 | */ | |
3673 | if (es->s_last_orphan) { | |
b31e1552 | 3674 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
3675 | "remount RDWR because of unprocessed " |
3676 | "orphan inode list. Please " | |
b31e1552 | 3677 | "umount/remount instead"); |
ead6596b ES |
3678 | err = -EINVAL; |
3679 | goto restore_opts; | |
3680 | } | |
3681 | ||
ac27a0ec DK |
3682 | /* |
3683 | * Mounting a RDONLY partition read-write, so reread | |
3684 | * and store the current valid flag. (It may have | |
3685 | * been changed by e2fsck since we originally mounted | |
3686 | * the partition.) | |
3687 | */ | |
0390131b FM |
3688 | if (sbi->s_journal) |
3689 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3690 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3691 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3692 | goto restore_opts; |
2b2d6d01 | 3693 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3694 | sb->s_flags &= ~MS_RDONLY; |
3695 | } | |
3696 | } | |
6fd058f7 | 3697 | ext4_setup_system_zone(sb); |
0390131b | 3698 | if (sbi->s_journal == NULL) |
e2d67052 | 3699 | ext4_commit_super(sb, 1); |
0390131b | 3700 | |
ac27a0ec DK |
3701 | #ifdef CONFIG_QUOTA |
3702 | /* Release old quota file names */ | |
3703 | for (i = 0; i < MAXQUOTAS; i++) | |
3704 | if (old_opts.s_qf_names[i] && | |
3705 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3706 | kfree(old_opts.s_qf_names[i]); | |
3707 | #endif | |
bbd6851a | 3708 | unlock_super(sb); |
337eb00a | 3709 | unlock_kernel(); |
ac27a0ec | 3710 | return 0; |
0b8e58a1 | 3711 | |
ac27a0ec DK |
3712 | restore_opts: |
3713 | sb->s_flags = old_sb_flags; | |
3714 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3715 | sbi->s_resuid = old_opts.s_resuid; | |
3716 | sbi->s_resgid = old_opts.s_resgid; | |
3717 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3718 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3719 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3720 | #ifdef CONFIG_QUOTA |
3721 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3722 | for (i = 0; i < MAXQUOTAS; i++) { | |
3723 | if (sbi->s_qf_names[i] && | |
3724 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3725 | kfree(sbi->s_qf_names[i]); | |
3726 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3727 | } | |
3728 | #endif | |
bbd6851a | 3729 | unlock_super(sb); |
337eb00a | 3730 | unlock_kernel(); |
ac27a0ec DK |
3731 | return err; |
3732 | } | |
3733 | ||
2b2d6d01 | 3734 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3735 | { |
3736 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3737 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3738 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3739 | u64 fsid; |
ac27a0ec | 3740 | |
5e70030d BP |
3741 | if (test_opt(sb, MINIX_DF)) { |
3742 | sbi->s_overhead_last = 0; | |
6bc9feff | 3743 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 3744 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 3745 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3746 | |
3747 | /* | |
5e70030d BP |
3748 | * Compute the overhead (FS structures). This is constant |
3749 | * for a given filesystem unless the number of block groups | |
3750 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3751 | */ |
3752 | ||
3753 | /* | |
3754 | * All of the blocks before first_data_block are | |
3755 | * overhead | |
3756 | */ | |
3757 | overhead = le32_to_cpu(es->s_first_data_block); | |
3758 | ||
3759 | /* | |
3760 | * Add the overhead attributed to the superblock and | |
3761 | * block group descriptors. If the sparse superblocks | |
3762 | * feature is turned on, then not all groups have this. | |
3763 | */ | |
3764 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3765 | overhead += ext4_bg_has_super(sb, i) + |
3766 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3767 | cond_resched(); |
3768 | } | |
3769 | ||
3770 | /* | |
3771 | * Every block group has an inode bitmap, a block | |
3772 | * bitmap, and an inode table. | |
3773 | */ | |
5e70030d BP |
3774 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3775 | sbi->s_overhead_last = overhead; | |
3776 | smp_wmb(); | |
6bc9feff | 3777 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3778 | } |
3779 | ||
617ba13b | 3780 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3781 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3782 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3783 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3784 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
3785 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3786 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3787 | buf->f_bavail = 0; |
3788 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3789 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 3790 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3791 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3792 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3793 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3794 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 3795 | |
ac27a0ec DK |
3796 | return 0; |
3797 | } | |
3798 | ||
0b8e58a1 AD |
3799 | /* Helper function for writing quotas on sync - we need to start transaction |
3800 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 3801 | * Process 1 Process 2 |
617ba13b | 3802 | * ext4_create() quota_sync() |
a269eb18 JK |
3803 | * jbd2_journal_start() write_dquot() |
3804 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3805 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3806 | * |
3807 | */ | |
3808 | ||
3809 | #ifdef CONFIG_QUOTA | |
3810 | ||
3811 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3812 | { | |
3813 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3814 | } | |
3815 | ||
617ba13b | 3816 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3817 | { |
3818 | int ret, err; | |
3819 | handle_t *handle; | |
3820 | struct inode *inode; | |
3821 | ||
3822 | inode = dquot_to_inode(dquot); | |
617ba13b | 3823 | handle = ext4_journal_start(inode, |
0b8e58a1 | 3824 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3825 | if (IS_ERR(handle)) |
3826 | return PTR_ERR(handle); | |
3827 | ret = dquot_commit(dquot); | |
617ba13b | 3828 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3829 | if (!ret) |
3830 | ret = err; | |
3831 | return ret; | |
3832 | } | |
3833 | ||
617ba13b | 3834 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3835 | { |
3836 | int ret, err; | |
3837 | handle_t *handle; | |
3838 | ||
617ba13b | 3839 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3840 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3841 | if (IS_ERR(handle)) |
3842 | return PTR_ERR(handle); | |
3843 | ret = dquot_acquire(dquot); | |
617ba13b | 3844 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3845 | if (!ret) |
3846 | ret = err; | |
3847 | return ret; | |
3848 | } | |
3849 | ||
617ba13b | 3850 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3851 | { |
3852 | int ret, err; | |
3853 | handle_t *handle; | |
3854 | ||
617ba13b | 3855 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3856 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
3857 | if (IS_ERR(handle)) { |
3858 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3859 | dquot_release(dquot); | |
ac27a0ec | 3860 | return PTR_ERR(handle); |
9c3013e9 | 3861 | } |
ac27a0ec | 3862 | ret = dquot_release(dquot); |
617ba13b | 3863 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3864 | if (!ret) |
3865 | ret = err; | |
3866 | return ret; | |
3867 | } | |
3868 | ||
617ba13b | 3869 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3870 | { |
2c8be6b2 | 3871 | /* Are we journaling quotas? */ |
617ba13b MC |
3872 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3873 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3874 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3875 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3876 | } else { |
3877 | return dquot_mark_dquot_dirty(dquot); | |
3878 | } | |
3879 | } | |
3880 | ||
617ba13b | 3881 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3882 | { |
3883 | int ret, err; | |
3884 | handle_t *handle; | |
3885 | ||
3886 | /* Data block + inode block */ | |
617ba13b | 3887 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3888 | if (IS_ERR(handle)) |
3889 | return PTR_ERR(handle); | |
3890 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3891 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3892 | if (!ret) |
3893 | ret = err; | |
3894 | return ret; | |
3895 | } | |
3896 | ||
3897 | /* | |
3898 | * Turn on quotas during mount time - we need to find | |
3899 | * the quota file and such... | |
3900 | */ | |
617ba13b | 3901 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3902 | { |
617ba13b | 3903 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
0b8e58a1 | 3904 | EXT4_SB(sb)->s_jquota_fmt, type); |
ac27a0ec DK |
3905 | } |
3906 | ||
3907 | /* | |
3908 | * Standard function to be called on quota_on | |
3909 | */ | |
617ba13b | 3910 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3911 | char *name, int remount) |
ac27a0ec DK |
3912 | { |
3913 | int err; | |
8264613d | 3914 | struct path path; |
ac27a0ec DK |
3915 | |
3916 | if (!test_opt(sb, QUOTA)) | |
3917 | return -EINVAL; | |
8264613d | 3918 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3919 | if (remount) |
8264613d | 3920 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3921 | |
8264613d | 3922 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3923 | if (err) |
3924 | return err; | |
0623543b | 3925 | |
ac27a0ec | 3926 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3927 | if (path.mnt->mnt_sb != sb) { |
3928 | path_put(&path); | |
ac27a0ec DK |
3929 | return -EXDEV; |
3930 | } | |
0623543b JK |
3931 | /* Journaling quota? */ |
3932 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3933 | /* Quotafile not in fs root? */ |
8264613d | 3934 | if (path.dentry->d_parent != sb->s_root) |
b31e1552 ES |
3935 | ext4_msg(sb, KERN_WARNING, |
3936 | "Quota file not on filesystem root. " | |
3937 | "Journaled quota will not work"); | |
2b2d6d01 | 3938 | } |
0623543b JK |
3939 | |
3940 | /* | |
3941 | * When we journal data on quota file, we have to flush journal to see | |
3942 | * all updates to the file when we bypass pagecache... | |
3943 | */ | |
0390131b FM |
3944 | if (EXT4_SB(sb)->s_journal && |
3945 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3946 | /* |
3947 | * We don't need to lock updates but journal_flush() could | |
3948 | * otherwise be livelocked... | |
3949 | */ | |
3950 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3951 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3952 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3953 | if (err) { |
8264613d | 3954 | path_put(&path); |
7ffe1ea8 HK |
3955 | return err; |
3956 | } | |
0623543b JK |
3957 | } |
3958 | ||
8264613d AV |
3959 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3960 | path_put(&path); | |
77e69dac | 3961 | return err; |
ac27a0ec DK |
3962 | } |
3963 | ||
3964 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3965 | * acquiring the locks... As quota files are never truncated and quota code | |
3966 | * itself serializes the operations (and noone else should touch the files) | |
3967 | * we don't have to be afraid of races */ | |
617ba13b | 3968 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3969 | size_t len, loff_t off) |
3970 | { | |
3971 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3972 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3973 | int err = 0; |
3974 | int offset = off & (sb->s_blocksize - 1); | |
3975 | int tocopy; | |
3976 | size_t toread; | |
3977 | struct buffer_head *bh; | |
3978 | loff_t i_size = i_size_read(inode); | |
3979 | ||
3980 | if (off > i_size) | |
3981 | return 0; | |
3982 | if (off+len > i_size) | |
3983 | len = i_size-off; | |
3984 | toread = len; | |
3985 | while (toread > 0) { | |
3986 | tocopy = sb->s_blocksize - offset < toread ? | |
3987 | sb->s_blocksize - offset : toread; | |
617ba13b | 3988 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3989 | if (err) |
3990 | return err; | |
3991 | if (!bh) /* A hole? */ | |
3992 | memset(data, 0, tocopy); | |
3993 | else | |
3994 | memcpy(data, bh->b_data+offset, tocopy); | |
3995 | brelse(bh); | |
3996 | offset = 0; | |
3997 | toread -= tocopy; | |
3998 | data += tocopy; | |
3999 | blk++; | |
4000 | } | |
4001 | return len; | |
4002 | } | |
4003 | ||
4004 | /* Write to quotafile (we know the transaction is already started and has | |
4005 | * enough credits) */ | |
617ba13b | 4006 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4007 | const char *data, size_t len, loff_t off) |
4008 | { | |
4009 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4010 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4011 | int err = 0; |
4012 | int offset = off & (sb->s_blocksize - 1); | |
4013 | int tocopy; | |
617ba13b | 4014 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
4015 | size_t towrite = len; |
4016 | struct buffer_head *bh; | |
4017 | handle_t *handle = journal_current_handle(); | |
4018 | ||
0390131b | 4019 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4020 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4021 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4022 | (unsigned long long)off, (unsigned long long)len); |
4023 | return -EIO; | |
4024 | } | |
ac27a0ec DK |
4025 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
4026 | while (towrite > 0) { | |
4027 | tocopy = sb->s_blocksize - offset < towrite ? | |
4028 | sb->s_blocksize - offset : towrite; | |
617ba13b | 4029 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
4030 | if (!bh) |
4031 | goto out; | |
4032 | if (journal_quota) { | |
617ba13b | 4033 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
4034 | if (err) { |
4035 | brelse(bh); | |
4036 | goto out; | |
4037 | } | |
4038 | } | |
4039 | lock_buffer(bh); | |
4040 | memcpy(bh->b_data+offset, data, tocopy); | |
4041 | flush_dcache_page(bh->b_page); | |
4042 | unlock_buffer(bh); | |
4043 | if (journal_quota) | |
0390131b | 4044 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
4045 | else { |
4046 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 4047 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
4048 | mark_buffer_dirty(bh); |
4049 | } | |
4050 | brelse(bh); | |
4051 | if (err) | |
4052 | goto out; | |
4053 | offset = 0; | |
4054 | towrite -= tocopy; | |
4055 | data += tocopy; | |
4056 | blk++; | |
4057 | } | |
4058 | out: | |
4d04e4fb JK |
4059 | if (len == towrite) { |
4060 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 4061 | return err; |
4d04e4fb | 4062 | } |
ac27a0ec DK |
4063 | if (inode->i_size < off+len-towrite) { |
4064 | i_size_write(inode, off+len-towrite); | |
617ba13b | 4065 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 4066 | } |
ac27a0ec | 4067 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 4068 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
4069 | mutex_unlock(&inode->i_mutex); |
4070 | return len - towrite; | |
4071 | } | |
4072 | ||
4073 | #endif | |
4074 | ||
0b8e58a1 AD |
4075 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
4076 | const char *dev_name, void *data, struct vfsmount *mnt) | |
ac27a0ec | 4077 | { |
0b8e58a1 | 4078 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
ac27a0ec DK |
4079 | } |
4080 | ||
a214238d | 4081 | #if !defined(CONTIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4082 | static struct file_system_type ext2_fs_type = { |
4083 | .owner = THIS_MODULE, | |
4084 | .name = "ext2", | |
4085 | .get_sb = ext4_get_sb, | |
4086 | .kill_sb = kill_block_super, | |
4087 | .fs_flags = FS_REQUIRES_DEV, | |
4088 | }; | |
4089 | ||
4090 | static inline void register_as_ext2(void) | |
4091 | { | |
4092 | int err = register_filesystem(&ext2_fs_type); | |
4093 | if (err) | |
4094 | printk(KERN_WARNING | |
4095 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4096 | } | |
4097 | ||
4098 | static inline void unregister_as_ext2(void) | |
4099 | { | |
4100 | unregister_filesystem(&ext2_fs_type); | |
4101 | } | |
51b7e3c9 | 4102 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4103 | #else |
4104 | static inline void register_as_ext2(void) { } | |
4105 | static inline void unregister_as_ext2(void) { } | |
4106 | #endif | |
4107 | ||
a214238d | 4108 | #if !defined(CONTIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4109 | static struct file_system_type ext3_fs_type = { |
4110 | .owner = THIS_MODULE, | |
4111 | .name = "ext3", | |
4112 | .get_sb = ext4_get_sb, | |
4113 | .kill_sb = kill_block_super, | |
4114 | .fs_flags = FS_REQUIRES_DEV, | |
4115 | }; | |
4116 | ||
4117 | static inline void register_as_ext3(void) | |
4118 | { | |
4119 | int err = register_filesystem(&ext3_fs_type); | |
4120 | if (err) | |
4121 | printk(KERN_WARNING | |
4122 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4123 | } | |
4124 | ||
4125 | static inline void unregister_as_ext3(void) | |
4126 | { | |
4127 | unregister_filesystem(&ext3_fs_type); | |
4128 | } | |
51b7e3c9 | 4129 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4130 | #else |
4131 | static inline void register_as_ext3(void) { } | |
4132 | static inline void unregister_as_ext3(void) { } | |
4133 | #endif | |
4134 | ||
03010a33 TT |
4135 | static struct file_system_type ext4_fs_type = { |
4136 | .owner = THIS_MODULE, | |
4137 | .name = "ext4", | |
4138 | .get_sb = ext4_get_sb, | |
4139 | .kill_sb = kill_block_super, | |
4140 | .fs_flags = FS_REQUIRES_DEV, | |
4141 | }; | |
4142 | ||
617ba13b | 4143 | static int __init init_ext4_fs(void) |
ac27a0ec | 4144 | { |
c9de560d AT |
4145 | int err; |
4146 | ||
6fd058f7 TT |
4147 | err = init_ext4_system_zone(); |
4148 | if (err) | |
4149 | return err; | |
3197ebdb TT |
4150 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4151 | if (!ext4_kset) | |
6fd058f7 | 4152 | goto out4; |
9f6200bb | 4153 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 4154 | err = init_ext4_mballoc(); |
ac27a0ec | 4155 | if (err) |
6fd058f7 | 4156 | goto out3; |
c9de560d AT |
4157 | |
4158 | err = init_ext4_xattr(); | |
4159 | if (err) | |
4160 | goto out2; | |
ac27a0ec DK |
4161 | err = init_inodecache(); |
4162 | if (err) | |
4163 | goto out1; | |
24b58424 TT |
4164 | register_as_ext2(); |
4165 | register_as_ext3(); | |
03010a33 | 4166 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4167 | if (err) |
4168 | goto out; | |
4169 | return 0; | |
4170 | out: | |
24b58424 TT |
4171 | unregister_as_ext2(); |
4172 | unregister_as_ext3(); | |
ac27a0ec DK |
4173 | destroy_inodecache(); |
4174 | out1: | |
617ba13b | 4175 | exit_ext4_xattr(); |
c9de560d AT |
4176 | out2: |
4177 | exit_ext4_mballoc(); | |
6fd058f7 TT |
4178 | out3: |
4179 | remove_proc_entry("fs/ext4", NULL); | |
4180 | kset_unregister(ext4_kset); | |
4181 | out4: | |
4182 | exit_ext4_system_zone(); | |
ac27a0ec DK |
4183 | return err; |
4184 | } | |
4185 | ||
617ba13b | 4186 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 4187 | { |
24b58424 TT |
4188 | unregister_as_ext2(); |
4189 | unregister_as_ext3(); | |
03010a33 | 4190 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4191 | destroy_inodecache(); |
617ba13b | 4192 | exit_ext4_xattr(); |
c9de560d | 4193 | exit_ext4_mballoc(); |
9f6200bb | 4194 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4195 | kset_unregister(ext4_kset); |
6fd058f7 | 4196 | exit_ext4_system_zone(); |
ac27a0ec DK |
4197 | } |
4198 | ||
4199 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4200 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4201 | MODULE_LICENSE("GPL"); |
617ba13b MC |
4202 | module_init(init_ext4_fs) |
4203 | module_exit(exit_ext4_fs) |