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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> | |
dab291af | 23 | #include <linux/jbd2.h> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/parser.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/buffer_head.h> | |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
ede86cc4 | 38 | #include <linux/marker.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
3dcf5451 CH |
43 | #include "ext4.h" |
44 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
45 | #include "xattr.h" |
46 | #include "acl.h" | |
47 | #include "namei.h" | |
717d50e4 | 48 | #include "group.h" |
ac27a0ec | 49 | |
9f6200bb TT |
50 | struct proc_dir_entry *ext4_proc_root; |
51 | ||
617ba13b | 52 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 53 | unsigned long journal_devnum); |
2b2d6d01 TT |
54 | static void ext4_commit_super(struct super_block *sb, |
55 | struct ext4_super_block *es, int sync); | |
56 | static void ext4_mark_recovery_complete(struct super_block *sb, | |
57 | struct ext4_super_block *es); | |
58 | static void ext4_clear_journal_err(struct super_block *sb, | |
59 | struct ext4_super_block *es); | |
617ba13b | 60 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 61 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 62 | char nbuf[16]); |
2b2d6d01 TT |
63 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
64 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
617ba13b | 65 | static void ext4_unlockfs(struct super_block *sb); |
2b2d6d01 | 66 | static void ext4_write_super(struct super_block *sb); |
617ba13b | 67 | static void ext4_write_super_lockfs(struct super_block *sb); |
ac27a0ec | 68 | |
bd81d8ee | 69 | |
8fadc143 AR |
70 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
71 | struct ext4_group_desc *bg) | |
bd81d8ee | 72 | { |
3a14589c | 73 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 74 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 75 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
76 | } |
77 | ||
8fadc143 AR |
78 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
79 | struct ext4_group_desc *bg) | |
bd81d8ee | 80 | { |
5272f837 | 81 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 82 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 83 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
84 | } |
85 | ||
8fadc143 AR |
86 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
87 | struct ext4_group_desc *bg) | |
bd81d8ee | 88 | { |
5272f837 | 89 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 90 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 91 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
92 | } |
93 | ||
560671a0 AK |
94 | __u32 ext4_free_blks_count(struct super_block *sb, |
95 | struct ext4_group_desc *bg) | |
96 | { | |
97 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
98 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
99 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); | |
100 | } | |
101 | ||
102 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
103 | struct ext4_group_desc *bg) | |
104 | { | |
105 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
106 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
107 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); | |
108 | } | |
109 | ||
110 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
111 | struct ext4_group_desc *bg) | |
112 | { | |
113 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
114 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
115 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); | |
116 | } | |
117 | ||
118 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
119 | struct ext4_group_desc *bg) | |
120 | { | |
121 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
122 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
123 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); | |
124 | } | |
125 | ||
8fadc143 AR |
126 | void ext4_block_bitmap_set(struct super_block *sb, |
127 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 128 | { |
3a14589c | 129 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
130 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
131 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
132 | } |
133 | ||
8fadc143 AR |
134 | void ext4_inode_bitmap_set(struct super_block *sb, |
135 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 136 | { |
5272f837 | 137 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
138 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
139 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
140 | } |
141 | ||
8fadc143 AR |
142 | void ext4_inode_table_set(struct super_block *sb, |
143 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 144 | { |
5272f837 | 145 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
146 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
147 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
148 | } |
149 | ||
560671a0 AK |
150 | void ext4_free_blks_set(struct super_block *sb, |
151 | struct ext4_group_desc *bg, __u32 count) | |
152 | { | |
153 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
154 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
155 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
156 | } | |
157 | ||
158 | void ext4_free_inodes_set(struct super_block *sb, | |
159 | struct ext4_group_desc *bg, __u32 count) | |
160 | { | |
161 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
162 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
163 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
164 | } | |
165 | ||
166 | void ext4_used_dirs_set(struct super_block *sb, | |
167 | struct ext4_group_desc *bg, __u32 count) | |
168 | { | |
169 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
170 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
171 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
172 | } | |
173 | ||
174 | void ext4_itable_unused_set(struct super_block *sb, | |
175 | struct ext4_group_desc *bg, __u32 count) | |
176 | { | |
177 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
178 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
179 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
180 | } | |
181 | ||
ac27a0ec | 182 | /* |
dab291af | 183 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
184 | * |
185 | * The only special thing we need to do here is to make sure that all | |
186 | * journal_end calls result in the superblock being marked dirty, so | |
187 | * that sync() will call the filesystem's write_super callback if | |
188 | * appropriate. | |
189 | */ | |
617ba13b | 190 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
191 | { |
192 | journal_t *journal; | |
193 | ||
194 | if (sb->s_flags & MS_RDONLY) | |
195 | return ERR_PTR(-EROFS); | |
196 | ||
197 | /* Special case here: if the journal has aborted behind our | |
198 | * backs (eg. EIO in the commit thread), then we still need to | |
199 | * take the FS itself readonly cleanly. */ | |
617ba13b | 200 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
201 | if (journal) { |
202 | if (is_journal_aborted(journal)) { | |
203 | ext4_abort(sb, __func__, | |
204 | "Detected aborted journal"); | |
205 | return ERR_PTR(-EROFS); | |
206 | } | |
207 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 208 | } |
0390131b FM |
209 | /* |
210 | * We're not journaling, return the appropriate indication. | |
211 | */ | |
212 | current->journal_info = EXT4_NOJOURNAL_HANDLE; | |
213 | return current->journal_info; | |
ac27a0ec DK |
214 | } |
215 | ||
216 | /* | |
217 | * The only special thing we need to do here is to make sure that all | |
dab291af | 218 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
219 | * that sync() will call the filesystem's write_super callback if |
220 | * appropriate. | |
221 | */ | |
617ba13b | 222 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
223 | { |
224 | struct super_block *sb; | |
225 | int err; | |
226 | int rc; | |
227 | ||
0390131b FM |
228 | if (!ext4_handle_valid(handle)) { |
229 | /* | |
230 | * Do this here since we don't call jbd2_journal_stop() in | |
231 | * no-journal mode. | |
232 | */ | |
233 | current->journal_info = NULL; | |
234 | return 0; | |
235 | } | |
ac27a0ec DK |
236 | sb = handle->h_transaction->t_journal->j_private; |
237 | err = handle->h_err; | |
dab291af | 238 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
239 | |
240 | if (!err) | |
241 | err = rc; | |
242 | if (err) | |
617ba13b | 243 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
244 | return err; |
245 | } | |
246 | ||
617ba13b | 247 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
248 | struct buffer_head *bh, handle_t *handle, int err) |
249 | { | |
250 | char nbuf[16]; | |
617ba13b | 251 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 252 | |
0390131b FM |
253 | BUG_ON(!ext4_handle_valid(handle)); |
254 | ||
ac27a0ec DK |
255 | if (bh) |
256 | BUFFER_TRACE(bh, "abort"); | |
257 | ||
258 | if (!handle->h_err) | |
259 | handle->h_err = err; | |
260 | ||
261 | if (is_handle_aborted(handle)) | |
262 | return; | |
263 | ||
264 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
265 | caller, errstr, err_fn); | |
266 | ||
dab291af | 267 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
268 | } |
269 | ||
270 | /* Deal with the reporting of failure conditions on a filesystem such as | |
271 | * inconsistencies detected or read IO failures. | |
272 | * | |
273 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 274 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
275 | * write ordering constraints on the superblock which prevent us from |
276 | * writing it out straight away; and given that the journal is about to | |
277 | * be aborted, we can't rely on the current, or future, transactions to | |
278 | * write out the superblock safely. | |
279 | * | |
dab291af | 280 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
281 | * the journal instead. On recovery, the journal will compain about |
282 | * that error until we've noted it down and cleared it. | |
283 | */ | |
284 | ||
617ba13b | 285 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 286 | { |
617ba13b | 287 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 288 | |
617ba13b MC |
289 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
290 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
291 | |
292 | if (sb->s_flags & MS_RDONLY) | |
293 | return; | |
294 | ||
2b2d6d01 | 295 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 296 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 297 | |
617ba13b | 298 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 299 | if (journal) |
dab291af | 300 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 301 | } |
2b2d6d01 TT |
302 | if (test_opt(sb, ERRORS_RO)) { |
303 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
304 | sb->s_flags |= MS_RDONLY; |
305 | } | |
617ba13b | 306 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 307 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 308 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
309 | sb->s_id); |
310 | } | |
311 | ||
2b2d6d01 TT |
312 | void ext4_error(struct super_block *sb, const char *function, |
313 | const char *fmt, ...) | |
ac27a0ec DK |
314 | { |
315 | va_list args; | |
316 | ||
317 | va_start(args, fmt); | |
2b2d6d01 | 318 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
319 | vprintk(fmt, args); |
320 | printk("\n"); | |
321 | va_end(args); | |
322 | ||
617ba13b | 323 | ext4_handle_error(sb); |
ac27a0ec DK |
324 | } |
325 | ||
2b2d6d01 | 326 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
327 | char nbuf[16]) |
328 | { | |
329 | char *errstr = NULL; | |
330 | ||
331 | switch (errno) { | |
332 | case -EIO: | |
333 | errstr = "IO failure"; | |
334 | break; | |
335 | case -ENOMEM: | |
336 | errstr = "Out of memory"; | |
337 | break; | |
338 | case -EROFS: | |
dab291af | 339 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
340 | errstr = "Journal has aborted"; |
341 | else | |
342 | errstr = "Readonly filesystem"; | |
343 | break; | |
344 | default: | |
345 | /* If the caller passed in an extra buffer for unknown | |
346 | * errors, textualise them now. Else we just return | |
347 | * NULL. */ | |
348 | if (nbuf) { | |
349 | /* Check for truncated error codes... */ | |
350 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
351 | errstr = nbuf; | |
352 | } | |
353 | break; | |
354 | } | |
355 | ||
356 | return errstr; | |
357 | } | |
358 | ||
617ba13b | 359 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
360 | * automatically and invokes the appropriate error response. */ |
361 | ||
2b2d6d01 | 362 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
363 | { |
364 | char nbuf[16]; | |
365 | const char *errstr; | |
366 | ||
367 | /* Special case: if the error is EROFS, and we're not already | |
368 | * inside a transaction, then there's really no point in logging | |
369 | * an error. */ | |
370 | if (errno == -EROFS && journal_current_handle() == NULL && | |
371 | (sb->s_flags & MS_RDONLY)) | |
372 | return; | |
373 | ||
617ba13b | 374 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
375 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
376 | sb->s_id, function, errstr); | |
ac27a0ec | 377 | |
617ba13b | 378 | ext4_handle_error(sb); |
ac27a0ec DK |
379 | } |
380 | ||
381 | /* | |
617ba13b | 382 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
383 | * abort function may be used to deal with unrecoverable failures such |
384 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
385 | * | |
386 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
387 | * unless the error response on the fs has been set to panic in which | |
388 | * case we take the easy way out and panic immediately. | |
389 | */ | |
390 | ||
2b2d6d01 TT |
391 | void ext4_abort(struct super_block *sb, const char *function, |
392 | const char *fmt, ...) | |
ac27a0ec DK |
393 | { |
394 | va_list args; | |
395 | ||
2b2d6d01 | 396 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
397 | |
398 | va_start(args, fmt); | |
2b2d6d01 | 399 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
400 | vprintk(fmt, args); |
401 | printk("\n"); | |
402 | va_end(args); | |
403 | ||
404 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 405 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
406 | |
407 | if (sb->s_flags & MS_RDONLY) | |
408 | return; | |
409 | ||
410 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 411 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 412 | sb->s_flags |= MS_RDONLY; |
617ba13b | 413 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
414 | if (EXT4_SB(sb)->s_journal) |
415 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
416 | } |
417 | ||
2b2d6d01 TT |
418 | void ext4_warning(struct super_block *sb, const char *function, |
419 | const char *fmt, ...) | |
ac27a0ec DK |
420 | { |
421 | va_list args; | |
422 | ||
423 | va_start(args, fmt); | |
617ba13b | 424 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
425 | sb->s_id, function); |
426 | vprintk(fmt, args); | |
427 | printk("\n"); | |
428 | va_end(args); | |
429 | } | |
430 | ||
5d1b1b3f AK |
431 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
432 | const char *function, const char *fmt, ...) | |
433 | __releases(bitlock) | |
434 | __acquires(bitlock) | |
435 | { | |
436 | va_list args; | |
437 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
438 | ||
439 | va_start(args, fmt); | |
440 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
441 | vprintk(fmt, args); | |
442 | printk("\n"); | |
443 | va_end(args); | |
444 | ||
445 | if (test_opt(sb, ERRORS_CONT)) { | |
446 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
447 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
448 | ext4_commit_super(sb, es, 0); | |
449 | return; | |
450 | } | |
451 | ext4_unlock_group(sb, grp); | |
452 | ext4_handle_error(sb); | |
453 | /* | |
454 | * We only get here in the ERRORS_RO case; relocking the group | |
455 | * may be dangerous, but nothing bad will happen since the | |
456 | * filesystem will have already been marked read/only and the | |
457 | * journal has been aborted. We return 1 as a hint to callers | |
458 | * who might what to use the return value from | |
459 | * ext4_grp_locked_error() to distinguish beween the | |
460 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
461 | * aggressively from the ext4 function in question, with a | |
462 | * more appropriate error code. | |
463 | */ | |
464 | ext4_lock_group(sb, grp); | |
465 | return; | |
466 | } | |
467 | ||
468 | ||
617ba13b | 469 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 470 | { |
617ba13b | 471 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 472 | |
617ba13b | 473 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
474 | return; |
475 | ||
46e665e9 | 476 | ext4_warning(sb, __func__, |
ac27a0ec DK |
477 | "updating to rev %d because of new feature flag, " |
478 | "running e2fsck is recommended", | |
617ba13b | 479 | EXT4_DYNAMIC_REV); |
ac27a0ec | 480 | |
617ba13b MC |
481 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
482 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
483 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
484 | /* leave es->s_feature_*compat flags alone */ |
485 | /* es->s_uuid will be set by e2fsck if empty */ | |
486 | ||
487 | /* | |
488 | * The rest of the superblock fields should be zero, and if not it | |
489 | * means they are likely already in use, so leave them alone. We | |
490 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
491 | */ | |
492 | } | |
493 | ||
494 | /* | |
495 | * Open the external journal device | |
496 | */ | |
617ba13b | 497 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
498 | { |
499 | struct block_device *bdev; | |
500 | char b[BDEVNAME_SIZE]; | |
501 | ||
502 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
503 | if (IS_ERR(bdev)) | |
504 | goto fail; | |
505 | return bdev; | |
506 | ||
507 | fail: | |
abda1418 | 508 | printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
509 | __bdevname(dev, b), PTR_ERR(bdev)); |
510 | return NULL; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Release the journal device | |
515 | */ | |
617ba13b | 516 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
517 | { |
518 | bd_release(bdev); | |
9a1c3542 | 519 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
520 | } |
521 | ||
617ba13b | 522 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
523 | { |
524 | struct block_device *bdev; | |
525 | int ret = -ENODEV; | |
526 | ||
527 | bdev = sbi->journal_bdev; | |
528 | if (bdev) { | |
617ba13b | 529 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
530 | sbi->journal_bdev = NULL; |
531 | } | |
532 | return ret; | |
533 | } | |
534 | ||
535 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
536 | { | |
617ba13b | 537 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
538 | } |
539 | ||
617ba13b | 540 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
541 | { |
542 | struct list_head *l; | |
543 | ||
544 | printk(KERN_ERR "sb orphan head is %d\n", | |
545 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
546 | ||
547 | printk(KERN_ERR "sb_info orphan list:\n"); | |
548 | list_for_each(l, &sbi->s_orphan) { | |
549 | struct inode *inode = orphan_list_entry(l); | |
550 | printk(KERN_ERR " " | |
551 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
552 | inode->i_sb->s_id, inode->i_ino, inode, | |
553 | inode->i_mode, inode->i_nlink, | |
554 | NEXT_ORPHAN(inode)); | |
555 | } | |
556 | } | |
557 | ||
2b2d6d01 | 558 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 559 | { |
617ba13b MC |
560 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
561 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 562 | int i, err; |
ac27a0ec | 563 | |
c9de560d | 564 | ext4_mb_release(sb); |
a86c6181 | 565 | ext4_ext_release(sb); |
617ba13b | 566 | ext4_xattr_put_super(sb); |
0390131b FM |
567 | if (sbi->s_journal) { |
568 | err = jbd2_journal_destroy(sbi->s_journal); | |
569 | sbi->s_journal = NULL; | |
570 | if (err < 0) | |
571 | ext4_abort(sb, __func__, | |
572 | "Couldn't clean up the journal"); | |
573 | } | |
ac27a0ec | 574 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 575 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 576 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
617ba13b | 577 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 578 | } |
240799cd TT |
579 | if (sbi->s_proc) { |
580 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); | |
9f6200bb | 581 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 582 | } |
ac27a0ec DK |
583 | |
584 | for (i = 0; i < sbi->s_gdb_count; i++) | |
585 | brelse(sbi->s_group_desc[i]); | |
586 | kfree(sbi->s_group_desc); | |
772cb7c8 | 587 | kfree(sbi->s_flex_groups); |
ac27a0ec DK |
588 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
589 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
590 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 591 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
592 | brelse(sbi->s_sbh); |
593 | #ifdef CONFIG_QUOTA | |
594 | for (i = 0; i < MAXQUOTAS; i++) | |
595 | kfree(sbi->s_qf_names[i]); | |
596 | #endif | |
597 | ||
598 | /* Debugging code just in case the in-memory inode orphan list | |
599 | * isn't empty. The on-disk one can be non-empty if we've | |
600 | * detected an error and taken the fs readonly, but the | |
601 | * in-memory list had better be clean by this point. */ | |
602 | if (!list_empty(&sbi->s_orphan)) | |
603 | dump_orphan_list(sb, sbi); | |
604 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
605 | ||
f98393a6 | 606 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
607 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
608 | /* | |
609 | * Invalidate the journal device's buffers. We don't want them | |
610 | * floating about in memory - the physical journal device may | |
611 | * hotswapped, and it breaks the `ro-after' testing code. | |
612 | */ | |
613 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 614 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 615 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
616 | } |
617 | sb->s_fs_info = NULL; | |
618 | kfree(sbi); | |
619 | return; | |
620 | } | |
621 | ||
e18b890b | 622 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
623 | |
624 | /* | |
625 | * Called inside transaction, so use GFP_NOFS | |
626 | */ | |
617ba13b | 627 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 628 | { |
617ba13b | 629 | struct ext4_inode_info *ei; |
ac27a0ec | 630 | |
e6b4f8da | 631 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
632 | if (!ei) |
633 | return NULL; | |
03010a33 | 634 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
635 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
636 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 637 | #endif |
ac27a0ec | 638 | ei->vfs_inode.i_version = 1; |
91246c00 | 639 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 640 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
641 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
642 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
643 | /* |
644 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
645 | * therefore it can be null here. Don't check it, just initialize | |
646 | * jinode. | |
647 | */ | |
678aaf48 | 648 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
649 | ei->i_reserved_data_blocks = 0; |
650 | ei->i_reserved_meta_blocks = 0; | |
651 | ei->i_allocated_meta_blocks = 0; | |
652 | ei->i_delalloc_reserved_flag = 0; | |
653 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
ac27a0ec DK |
654 | return &ei->vfs_inode; |
655 | } | |
656 | ||
617ba13b | 657 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 658 | { |
9f7dd93d VA |
659 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
660 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
661 | EXT4_I(inode)); | |
662 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
663 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
664 | true); | |
665 | dump_stack(); | |
666 | } | |
617ba13b | 667 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
668 | } |
669 | ||
51cc5068 | 670 | static void init_once(void *foo) |
ac27a0ec | 671 | { |
617ba13b | 672 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 673 | |
a35afb83 | 674 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 675 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 676 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 677 | #endif |
0e855ac8 | 678 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 679 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
680 | } |
681 | ||
682 | static int init_inodecache(void) | |
683 | { | |
617ba13b MC |
684 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
685 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
686 | 0, (SLAB_RECLAIM_ACCOUNT| |
687 | SLAB_MEM_SPREAD), | |
20c2df83 | 688 | init_once); |
617ba13b | 689 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
690 | return -ENOMEM; |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void destroy_inodecache(void) | |
695 | { | |
617ba13b | 696 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
697 | } |
698 | ||
617ba13b | 699 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 700 | { |
03010a33 | 701 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
702 | if (EXT4_I(inode)->i_acl && |
703 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
704 | posix_acl_release(EXT4_I(inode)->i_acl); | |
705 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
706 | } | |
707 | if (EXT4_I(inode)->i_default_acl && | |
708 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
709 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
710 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
711 | } |
712 | #endif | |
c2ea3fde | 713 | ext4_discard_preallocations(inode); |
0390131b FM |
714 | if (EXT4_JOURNAL(inode)) |
715 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 716 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
717 | } |
718 | ||
2b2d6d01 TT |
719 | static inline void ext4_show_quota_options(struct seq_file *seq, |
720 | struct super_block *sb) | |
ac27a0ec DK |
721 | { |
722 | #if defined(CONFIG_QUOTA) | |
617ba13b | 723 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
724 | |
725 | if (sbi->s_jquota_fmt) | |
726 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 727 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
728 | |
729 | if (sbi->s_qf_names[USRQUOTA]) | |
730 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
731 | ||
732 | if (sbi->s_qf_names[GRPQUOTA]) | |
733 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
734 | ||
617ba13b | 735 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
736 | seq_puts(seq, ",usrquota"); |
737 | ||
617ba13b | 738 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
739 | seq_puts(seq, ",grpquota"); |
740 | #endif | |
741 | } | |
742 | ||
d9c9bef1 MS |
743 | /* |
744 | * Show an option if | |
745 | * - it's set to a non-default value OR | |
746 | * - if the per-sb default is different from the global default | |
747 | */ | |
617ba13b | 748 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 749 | { |
aa22df2c AK |
750 | int def_errors; |
751 | unsigned long def_mount_opts; | |
ac27a0ec | 752 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
753 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
754 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
755 | |
756 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 757 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
758 | |
759 | if (sbi->s_sb_block != 1) | |
760 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
761 | if (test_opt(sb, MINIX_DF)) | |
762 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 763 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
764 | seq_puts(seq, ",grpid"); |
765 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
766 | seq_puts(seq, ",nogrpid"); | |
767 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
768 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
769 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
770 | } | |
771 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
772 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
773 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
774 | } | |
bb4f397a | 775 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 776 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
777 | def_errors == EXT4_ERRORS_CONTINUE) { |
778 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
779 | } |
780 | } | |
aa22df2c | 781 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 782 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 783 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 784 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 785 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 786 | seq_puts(seq, ",nouid32"); |
aa22df2c | 787 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
788 | seq_puts(seq, ",debug"); |
789 | if (test_opt(sb, OLDALLOC)) | |
790 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 791 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
792 | if (test_opt(sb, XATTR_USER) && |
793 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
794 | seq_puts(seq, ",user_xattr"); |
795 | if (!test_opt(sb, XATTR_USER) && | |
796 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
797 | seq_puts(seq, ",nouser_xattr"); | |
798 | } | |
799 | #endif | |
03010a33 | 800 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 801 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
802 | seq_puts(seq, ",acl"); |
803 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
804 | seq_puts(seq, ",noacl"); | |
805 | #endif | |
806 | if (!test_opt(sb, RESERVATION)) | |
807 | seq_puts(seq, ",noreservation"); | |
30773840 | 808 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
809 | seq_printf(seq, ",commit=%u", |
810 | (unsigned) (sbi->s_commit_interval / HZ)); | |
811 | } | |
30773840 TT |
812 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
813 | seq_printf(seq, ",min_batch_time=%u", | |
814 | (unsigned) sbi->s_min_batch_time); | |
815 | } | |
816 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
817 | seq_printf(seq, ",max_batch_time=%u", | |
818 | (unsigned) sbi->s_min_batch_time); | |
819 | } | |
820 | ||
571640ca ES |
821 | /* |
822 | * We're changing the default of barrier mount option, so | |
823 | * let's always display its mount state so it's clear what its | |
824 | * status is. | |
825 | */ | |
826 | seq_puts(seq, ",barrier="); | |
827 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
828 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
829 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
830 | if (test_opt(sb, NOBH)) |
831 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
832 | if (test_opt(sb, I_VERSION)) |
833 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
834 | if (!test_opt(sb, DELALLOC)) |
835 | seq_puts(seq, ",nodelalloc"); | |
836 | ||
ac27a0ec | 837 | |
cb45bbe4 MS |
838 | if (sbi->s_stripe) |
839 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
840 | /* |
841 | * journal mode get enabled in different ways | |
842 | * So just print the value even if we didn't specify it | |
843 | */ | |
617ba13b | 844 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 845 | seq_puts(seq, ",data=journal"); |
617ba13b | 846 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 847 | seq_puts(seq, ",data=ordered"); |
617ba13b | 848 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
849 | seq_puts(seq, ",data=writeback"); |
850 | ||
240799cd TT |
851 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
852 | seq_printf(seq, ",inode_readahead_blks=%u", | |
853 | sbi->s_inode_readahead_blks); | |
854 | ||
5bf5683a HK |
855 | if (test_opt(sb, DATA_ERR_ABORT)) |
856 | seq_puts(seq, ",data_err=abort"); | |
857 | ||
617ba13b | 858 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
859 | return 0; |
860 | } | |
861 | ||
862 | ||
1b961ac0 CH |
863 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
864 | u64 ino, u32 generation) | |
ac27a0ec | 865 | { |
ac27a0ec | 866 | struct inode *inode; |
ac27a0ec | 867 | |
617ba13b | 868 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 869 | return ERR_PTR(-ESTALE); |
617ba13b | 870 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
871 | return ERR_PTR(-ESTALE); |
872 | ||
873 | /* iget isn't really right if the inode is currently unallocated!! | |
874 | * | |
617ba13b | 875 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
876 | * deleted, so we should be safe. |
877 | * | |
878 | * Currently we don't know the generation for parent directory, so | |
879 | * a generation of 0 means "accept any" | |
880 | */ | |
1d1fe1ee DH |
881 | inode = ext4_iget(sb, ino); |
882 | if (IS_ERR(inode)) | |
883 | return ERR_CAST(inode); | |
884 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
885 | iput(inode); |
886 | return ERR_PTR(-ESTALE); | |
887 | } | |
1b961ac0 CH |
888 | |
889 | return inode; | |
890 | } | |
891 | ||
892 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
893 | int fh_len, int fh_type) | |
894 | { | |
895 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
896 | ext4_nfs_get_inode); | |
897 | } | |
898 | ||
899 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
900 | int fh_len, int fh_type) | |
901 | { | |
902 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
903 | ext4_nfs_get_inode); | |
ac27a0ec DK |
904 | } |
905 | ||
c39a7f84 TO |
906 | /* |
907 | * Try to release metadata pages (indirect blocks, directories) which are | |
908 | * mapped via the block device. Since these pages could have journal heads | |
909 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
910 | * jbd2 layer's try_to_free_buffers() function to release them. | |
911 | */ | |
912 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) | |
913 | { | |
914 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
915 | ||
916 | WARN_ON(PageChecked(page)); | |
917 | if (!page_has_buffers(page)) | |
918 | return 0; | |
919 | if (journal) | |
920 | return jbd2_journal_try_to_free_buffers(journal, page, | |
921 | wait & ~__GFP_WAIT); | |
922 | return try_to_free_buffers(page); | |
923 | } | |
924 | ||
ac27a0ec | 925 | #ifdef CONFIG_QUOTA |
af5bc92d | 926 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 927 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 928 | |
617ba13b MC |
929 | static int ext4_dquot_initialize(struct inode *inode, int type); |
930 | static int ext4_dquot_drop(struct inode *inode); | |
931 | static int ext4_write_dquot(struct dquot *dquot); | |
932 | static int ext4_acquire_dquot(struct dquot *dquot); | |
933 | static int ext4_release_dquot(struct dquot *dquot); | |
934 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
935 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
936 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
937 | char *path, int remount); | |
617ba13b MC |
938 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
939 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 940 | size_t len, loff_t off); |
617ba13b | 941 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
942 | const char *data, size_t len, loff_t off); |
943 | ||
617ba13b MC |
944 | static struct dquot_operations ext4_quota_operations = { |
945 | .initialize = ext4_dquot_initialize, | |
946 | .drop = ext4_dquot_drop, | |
ac27a0ec DK |
947 | .alloc_space = dquot_alloc_space, |
948 | .alloc_inode = dquot_alloc_inode, | |
949 | .free_space = dquot_free_space, | |
950 | .free_inode = dquot_free_inode, | |
951 | .transfer = dquot_transfer, | |
617ba13b MC |
952 | .write_dquot = ext4_write_dquot, |
953 | .acquire_dquot = ext4_acquire_dquot, | |
954 | .release_dquot = ext4_release_dquot, | |
955 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
956 | .write_info = ext4_write_info, |
957 | .alloc_dquot = dquot_alloc, | |
958 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
959 | }; |
960 | ||
617ba13b MC |
961 | static struct quotactl_ops ext4_qctl_operations = { |
962 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
963 | .quota_off = vfs_quota_off, |
964 | .quota_sync = vfs_quota_sync, | |
965 | .get_info = vfs_get_dqinfo, | |
966 | .set_info = vfs_set_dqinfo, | |
967 | .get_dqblk = vfs_get_dqblk, | |
968 | .set_dqblk = vfs_set_dqblk | |
969 | }; | |
970 | #endif | |
971 | ||
ee9b6d61 | 972 | static const struct super_operations ext4_sops = { |
617ba13b MC |
973 | .alloc_inode = ext4_alloc_inode, |
974 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
975 | .write_inode = ext4_write_inode, |
976 | .dirty_inode = ext4_dirty_inode, | |
977 | .delete_inode = ext4_delete_inode, | |
978 | .put_super = ext4_put_super, | |
979 | .write_super = ext4_write_super, | |
980 | .sync_fs = ext4_sync_fs, | |
981 | .write_super_lockfs = ext4_write_super_lockfs, | |
982 | .unlockfs = ext4_unlockfs, | |
983 | .statfs = ext4_statfs, | |
984 | .remount_fs = ext4_remount, | |
985 | .clear_inode = ext4_clear_inode, | |
986 | .show_options = ext4_show_options, | |
ac27a0ec | 987 | #ifdef CONFIG_QUOTA |
617ba13b MC |
988 | .quota_read = ext4_quota_read, |
989 | .quota_write = ext4_quota_write, | |
ac27a0ec | 990 | #endif |
c39a7f84 | 991 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
992 | }; |
993 | ||
39655164 | 994 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
995 | .fh_to_dentry = ext4_fh_to_dentry, |
996 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 997 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
998 | }; |
999 | ||
1000 | enum { | |
1001 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1002 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1003 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec DK |
1004 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
1005 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, | |
30773840 | 1006 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1007 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1008 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1009 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
5bf5683a | 1010 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec DK |
1011 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1012 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
1013 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, | |
83982b6f | 1014 | Opt_grpquota, Opt_i_version, |
01436ef2 | 1015 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
b3881f74 | 1016 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1017 | }; |
1018 | ||
a447c093 | 1019 | static const match_table_t tokens = { |
ac27a0ec DK |
1020 | {Opt_bsd_df, "bsddf"}, |
1021 | {Opt_minix_df, "minixdf"}, | |
1022 | {Opt_grpid, "grpid"}, | |
1023 | {Opt_grpid, "bsdgroups"}, | |
1024 | {Opt_nogrpid, "nogrpid"}, | |
1025 | {Opt_nogrpid, "sysvgroups"}, | |
1026 | {Opt_resgid, "resgid=%u"}, | |
1027 | {Opt_resuid, "resuid=%u"}, | |
1028 | {Opt_sb, "sb=%u"}, | |
1029 | {Opt_err_cont, "errors=continue"}, | |
1030 | {Opt_err_panic, "errors=panic"}, | |
1031 | {Opt_err_ro, "errors=remount-ro"}, | |
1032 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1033 | {Opt_debug, "debug"}, |
1034 | {Opt_oldalloc, "oldalloc"}, | |
1035 | {Opt_orlov, "orlov"}, | |
1036 | {Opt_user_xattr, "user_xattr"}, | |
1037 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1038 | {Opt_acl, "acl"}, | |
1039 | {Opt_noacl, "noacl"}, | |
1040 | {Opt_reservation, "reservation"}, | |
1041 | {Opt_noreservation, "noreservation"}, | |
1042 | {Opt_noload, "noload"}, | |
1043 | {Opt_nobh, "nobh"}, | |
1044 | {Opt_bh, "bh"}, | |
1045 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1046 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1047 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1048 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1049 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1050 | {Opt_journal_checksum, "journal_checksum"}, |
1051 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1052 | {Opt_abort, "abort"}, |
1053 | {Opt_data_journal, "data=journal"}, | |
1054 | {Opt_data_ordered, "data=ordered"}, | |
1055 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1056 | {Opt_data_err_abort, "data_err=abort"}, |
1057 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1058 | {Opt_offusrjquota, "usrjquota="}, |
1059 | {Opt_usrjquota, "usrjquota=%s"}, | |
1060 | {Opt_offgrpjquota, "grpjquota="}, | |
1061 | {Opt_grpjquota, "grpjquota=%s"}, | |
1062 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1063 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1064 | {Opt_grpquota, "grpquota"}, | |
1065 | {Opt_noquota, "noquota"}, | |
1066 | {Opt_quota, "quota"}, | |
1067 | {Opt_usrquota, "usrquota"}, | |
1068 | {Opt_barrier, "barrier=%u"}, | |
25ec56b5 | 1069 | {Opt_i_version, "i_version"}, |
c9de560d | 1070 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1071 | {Opt_resize, "resize"}, |
64769240 | 1072 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1073 | {Opt_nodelalloc, "nodelalloc"}, |
240799cd | 1074 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1075 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
f3f12faa | 1076 | {Opt_err, NULL}, |
ac27a0ec DK |
1077 | }; |
1078 | ||
617ba13b | 1079 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1080 | { |
617ba13b | 1081 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1082 | char *options = (char *) *data; |
1083 | ||
1084 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1085 | return 1; /* Default location */ | |
1086 | options += 3; | |
617ba13b | 1087 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1088 | sb_block = simple_strtoul(options, &options, 0); |
1089 | if (*options && *options != ',') { | |
4776004f | 1090 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1091 | (char *) *data); |
1092 | return 1; | |
1093 | } | |
1094 | if (*options == ',') | |
1095 | options++; | |
1096 | *data = (void *) options; | |
1097 | return sb_block; | |
1098 | } | |
1099 | ||
b3881f74 TT |
1100 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1101 | ||
2b2d6d01 | 1102 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1103 | unsigned long *journal_devnum, |
b3881f74 | 1104 | unsigned int *journal_ioprio, |
2b2d6d01 | 1105 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1106 | { |
617ba13b | 1107 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1108 | char *p; |
ac27a0ec DK |
1109 | substring_t args[MAX_OPT_ARGS]; |
1110 | int data_opt = 0; | |
1111 | int option; | |
1112 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1113 | int qtype, qfmt; |
ac27a0ec DK |
1114 | char *qname; |
1115 | #endif | |
1116 | ||
1117 | if (!options) | |
1118 | return 1; | |
1119 | ||
2b2d6d01 | 1120 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1121 | int token; |
1122 | if (!*p) | |
1123 | continue; | |
1124 | ||
1125 | token = match_token(p, tokens, args); | |
1126 | switch (token) { | |
1127 | case Opt_bsd_df: | |
2b2d6d01 | 1128 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1129 | break; |
1130 | case Opt_minix_df: | |
2b2d6d01 | 1131 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1132 | break; |
1133 | case Opt_grpid: | |
2b2d6d01 | 1134 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1135 | break; |
1136 | case Opt_nogrpid: | |
2b2d6d01 | 1137 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1138 | break; |
1139 | case Opt_resuid: | |
1140 | if (match_int(&args[0], &option)) | |
1141 | return 0; | |
1142 | sbi->s_resuid = option; | |
1143 | break; | |
1144 | case Opt_resgid: | |
1145 | if (match_int(&args[0], &option)) | |
1146 | return 0; | |
1147 | sbi->s_resgid = option; | |
1148 | break; | |
1149 | case Opt_sb: | |
1150 | /* handled by get_sb_block() instead of here */ | |
1151 | /* *sb_block = match_int(&args[0]); */ | |
1152 | break; | |
1153 | case Opt_err_panic: | |
2b2d6d01 TT |
1154 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1155 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1156 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1157 | break; |
1158 | case Opt_err_ro: | |
2b2d6d01 TT |
1159 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1160 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1161 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1162 | break; |
1163 | case Opt_err_cont: | |
2b2d6d01 TT |
1164 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1165 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1166 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1167 | break; |
1168 | case Opt_nouid32: | |
2b2d6d01 | 1169 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1170 | break; |
ac27a0ec | 1171 | case Opt_debug: |
2b2d6d01 | 1172 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1173 | break; |
1174 | case Opt_oldalloc: | |
2b2d6d01 | 1175 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1176 | break; |
1177 | case Opt_orlov: | |
2b2d6d01 | 1178 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1179 | break; |
03010a33 | 1180 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1181 | case Opt_user_xattr: |
2b2d6d01 | 1182 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1183 | break; |
1184 | case Opt_nouser_xattr: | |
2b2d6d01 | 1185 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1186 | break; |
1187 | #else | |
1188 | case Opt_user_xattr: | |
1189 | case Opt_nouser_xattr: | |
4776004f TT |
1190 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1191 | "not supported\n"); | |
ac27a0ec DK |
1192 | break; |
1193 | #endif | |
03010a33 | 1194 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1195 | case Opt_acl: |
1196 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1197 | break; | |
1198 | case Opt_noacl: | |
1199 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1200 | break; | |
1201 | #else | |
1202 | case Opt_acl: | |
1203 | case Opt_noacl: | |
4776004f TT |
1204 | printk(KERN_ERR "EXT4 (no)acl options " |
1205 | "not supported\n"); | |
ac27a0ec DK |
1206 | break; |
1207 | #endif | |
1208 | case Opt_reservation: | |
1209 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1210 | break; | |
1211 | case Opt_noreservation: | |
1212 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1213 | break; | |
1214 | case Opt_journal_update: | |
1215 | /* @@@ FIXME */ | |
1216 | /* Eventually we will want to be able to create | |
1217 | a journal file here. For now, only allow the | |
1218 | user to specify an existing inode to be the | |
1219 | journal file. */ | |
1220 | if (is_remount) { | |
617ba13b | 1221 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1222 | "journal on remount\n"); |
1223 | return 0; | |
1224 | } | |
2b2d6d01 | 1225 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1226 | break; |
ac27a0ec DK |
1227 | case Opt_journal_dev: |
1228 | if (is_remount) { | |
617ba13b | 1229 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1230 | "journal on remount\n"); |
1231 | return 0; | |
1232 | } | |
1233 | if (match_int(&args[0], &option)) | |
1234 | return 0; | |
1235 | *journal_devnum = option; | |
1236 | break; | |
818d276c GS |
1237 | case Opt_journal_checksum: |
1238 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1239 | break; | |
1240 | case Opt_journal_async_commit: | |
1241 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1242 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1243 | break; | |
ac27a0ec | 1244 | case Opt_noload: |
2b2d6d01 | 1245 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1246 | break; |
1247 | case Opt_commit: | |
1248 | if (match_int(&args[0], &option)) | |
1249 | return 0; | |
1250 | if (option < 0) | |
1251 | return 0; | |
1252 | if (option == 0) | |
cd02ff0b | 1253 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1254 | sbi->s_commit_interval = HZ * option; |
1255 | break; | |
30773840 TT |
1256 | case Opt_max_batch_time: |
1257 | if (match_int(&args[0], &option)) | |
1258 | return 0; | |
1259 | if (option < 0) | |
1260 | return 0; | |
1261 | if (option == 0) | |
1262 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1263 | sbi->s_max_batch_time = option; | |
1264 | break; | |
1265 | case Opt_min_batch_time: | |
1266 | if (match_int(&args[0], &option)) | |
1267 | return 0; | |
1268 | if (option < 0) | |
1269 | return 0; | |
1270 | sbi->s_min_batch_time = option; | |
1271 | break; | |
ac27a0ec | 1272 | case Opt_data_journal: |
617ba13b | 1273 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1274 | goto datacheck; |
1275 | case Opt_data_ordered: | |
617ba13b | 1276 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1277 | goto datacheck; |
1278 | case Opt_data_writeback: | |
617ba13b | 1279 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1280 | datacheck: |
1281 | if (is_remount) { | |
617ba13b | 1282 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1283 | != data_opt) { |
1284 | printk(KERN_ERR | |
617ba13b | 1285 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1286 | "mode on remount\n"); |
1287 | return 0; | |
1288 | } | |
1289 | } else { | |
617ba13b | 1290 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1291 | sbi->s_mount_opt |= data_opt; |
1292 | } | |
1293 | break; | |
5bf5683a HK |
1294 | case Opt_data_err_abort: |
1295 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1296 | break; | |
1297 | case Opt_data_err_ignore: | |
1298 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1299 | break; | |
ac27a0ec DK |
1300 | #ifdef CONFIG_QUOTA |
1301 | case Opt_usrjquota: | |
1302 | qtype = USRQUOTA; | |
1303 | goto set_qf_name; | |
1304 | case Opt_grpjquota: | |
1305 | qtype = GRPQUOTA; | |
1306 | set_qf_name: | |
17bd13b3 | 1307 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1308 | !sbi->s_qf_names[qtype]) { |
ac27a0ec | 1309 | printk(KERN_ERR |
4776004f TT |
1310 | "EXT4-fs: Cannot change journaled " |
1311 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1312 | return 0; |
1313 | } | |
1314 | qname = match_strdup(&args[0]); | |
1315 | if (!qname) { | |
1316 | printk(KERN_ERR | |
617ba13b | 1317 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1318 | "storing quotafile name.\n"); |
1319 | return 0; | |
1320 | } | |
1321 | if (sbi->s_qf_names[qtype] && | |
1322 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1323 | printk(KERN_ERR | |
617ba13b | 1324 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1325 | "specified.\n", QTYPE2NAME(qtype)); |
1326 | kfree(qname); | |
1327 | return 0; | |
1328 | } | |
1329 | sbi->s_qf_names[qtype] = qname; | |
1330 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1331 | printk(KERN_ERR | |
617ba13b | 1332 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1333 | "filesystem root.\n"); |
1334 | kfree(sbi->s_qf_names[qtype]); | |
1335 | sbi->s_qf_names[qtype] = NULL; | |
1336 | return 0; | |
1337 | } | |
1338 | set_opt(sbi->s_mount_opt, QUOTA); | |
1339 | break; | |
1340 | case Opt_offusrjquota: | |
1341 | qtype = USRQUOTA; | |
1342 | goto clear_qf_name; | |
1343 | case Opt_offgrpjquota: | |
1344 | qtype = GRPQUOTA; | |
1345 | clear_qf_name: | |
17bd13b3 | 1346 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1347 | sbi->s_qf_names[qtype]) { |
617ba13b | 1348 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1349 | "journaled quota options when " |
ac27a0ec DK |
1350 | "quota turned on.\n"); |
1351 | return 0; | |
1352 | } | |
1353 | /* | |
1354 | * The space will be released later when all options | |
1355 | * are confirmed to be correct | |
1356 | */ | |
1357 | sbi->s_qf_names[qtype] = NULL; | |
1358 | break; | |
1359 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1360 | qfmt = QFMT_VFS_OLD; |
1361 | goto set_qf_format; | |
ac27a0ec | 1362 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1363 | qfmt = QFMT_VFS_V0; |
1364 | set_qf_format: | |
17bd13b3 | 1365 | if (sb_any_quota_loaded(sb) && |
dfc5d03f JK |
1366 | sbi->s_jquota_fmt != qfmt) { |
1367 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1368 | "journaled quota options when " | |
1369 | "quota turned on.\n"); | |
1370 | return 0; | |
1371 | } | |
1372 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1373 | break; |
1374 | case Opt_quota: | |
1375 | case Opt_usrquota: | |
1376 | set_opt(sbi->s_mount_opt, QUOTA); | |
1377 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1378 | break; | |
1379 | case Opt_grpquota: | |
1380 | set_opt(sbi->s_mount_opt, QUOTA); | |
1381 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1382 | break; | |
1383 | case Opt_noquota: | |
17bd13b3 | 1384 | if (sb_any_quota_loaded(sb)) { |
617ba13b | 1385 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1386 | "options when quota turned on.\n"); |
1387 | return 0; | |
1388 | } | |
1389 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1390 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1391 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1392 | break; | |
1393 | #else | |
1394 | case Opt_quota: | |
1395 | case Opt_usrquota: | |
1396 | case Opt_grpquota: | |
cd59e7b9 JK |
1397 | printk(KERN_ERR |
1398 | "EXT4-fs: quota options not supported.\n"); | |
1399 | break; | |
ac27a0ec DK |
1400 | case Opt_usrjquota: |
1401 | case Opt_grpjquota: | |
1402 | case Opt_offusrjquota: | |
1403 | case Opt_offgrpjquota: | |
1404 | case Opt_jqfmt_vfsold: | |
1405 | case Opt_jqfmt_vfsv0: | |
1406 | printk(KERN_ERR | |
cd59e7b9 | 1407 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1408 | "supported.\n"); |
1409 | break; | |
1410 | case Opt_noquota: | |
1411 | break; | |
1412 | #endif | |
1413 | case Opt_abort: | |
1414 | set_opt(sbi->s_mount_opt, ABORT); | |
1415 | break; | |
1416 | case Opt_barrier: | |
1417 | if (match_int(&args[0], &option)) | |
1418 | return 0; | |
1419 | if (option) | |
1420 | set_opt(sbi->s_mount_opt, BARRIER); | |
1421 | else | |
1422 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1423 | break; | |
1424 | case Opt_ignore: | |
1425 | break; | |
1426 | case Opt_resize: | |
1427 | if (!is_remount) { | |
617ba13b | 1428 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1429 | "for remount\n"); |
1430 | return 0; | |
1431 | } | |
1432 | if (match_int(&args[0], &option) != 0) | |
1433 | return 0; | |
1434 | *n_blocks_count = option; | |
1435 | break; | |
1436 | case Opt_nobh: | |
1437 | set_opt(sbi->s_mount_opt, NOBH); | |
1438 | break; | |
1439 | case Opt_bh: | |
1440 | clear_opt(sbi->s_mount_opt, NOBH); | |
1441 | break; | |
25ec56b5 JNC |
1442 | case Opt_i_version: |
1443 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1444 | sb->s_flags |= MS_I_VERSION; | |
1445 | break; | |
dd919b98 AK |
1446 | case Opt_nodelalloc: |
1447 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1448 | break; | |
c9de560d AT |
1449 | case Opt_stripe: |
1450 | if (match_int(&args[0], &option)) | |
1451 | return 0; | |
1452 | if (option < 0) | |
1453 | return 0; | |
1454 | sbi->s_stripe = option; | |
1455 | break; | |
64769240 AT |
1456 | case Opt_delalloc: |
1457 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1458 | break; | |
240799cd TT |
1459 | case Opt_inode_readahead_blks: |
1460 | if (match_int(&args[0], &option)) | |
1461 | return 0; | |
1462 | if (option < 0 || option > (1 << 30)) | |
1463 | return 0; | |
1464 | sbi->s_inode_readahead_blks = option; | |
1465 | break; | |
b3881f74 TT |
1466 | case Opt_journal_ioprio: |
1467 | if (match_int(&args[0], &option)) | |
1468 | return 0; | |
1469 | if (option < 0 || option > 7) | |
1470 | break; | |
1471 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1472 | option); | |
1473 | break; | |
ac27a0ec | 1474 | default: |
2b2d6d01 TT |
1475 | printk(KERN_ERR |
1476 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1477 | "or missing value\n", p); | |
ac27a0ec DK |
1478 | return 0; |
1479 | } | |
1480 | } | |
1481 | #ifdef CONFIG_QUOTA | |
1482 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1483 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1484 | sbi->s_qf_names[USRQUOTA]) |
1485 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1486 | ||
617ba13b | 1487 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1488 | sbi->s_qf_names[GRPQUOTA]) |
1489 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1490 | ||
1491 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1492 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1493 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1494 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1495 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1496 | "format mixing.\n"); |
1497 | return 0; | |
1498 | } | |
1499 | ||
1500 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1501 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1502 | "not specified.\n"); |
1503 | return 0; | |
1504 | } | |
1505 | } else { | |
1506 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1507 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1508 | "specified with no journaling " | |
ac27a0ec DK |
1509 | "enabled.\n"); |
1510 | return 0; | |
1511 | } | |
1512 | } | |
1513 | #endif | |
1514 | return 1; | |
1515 | } | |
1516 | ||
617ba13b | 1517 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1518 | int read_only) |
1519 | { | |
617ba13b | 1520 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1521 | int res = 0; |
1522 | ||
617ba13b | 1523 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1524 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1525 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1526 | res = MS_RDONLY; |
1527 | } | |
1528 | if (read_only) | |
1529 | return res; | |
617ba13b | 1530 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1531 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1532 | "running e2fsck is recommended\n"); | |
617ba13b | 1533 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1534 | printk(KERN_WARNING |
1535 | "EXT4-fs warning: mounting fs with errors, " | |
1536 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1537 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1538 | le16_to_cpu(es->s_mnt_count) >= | |
1539 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1540 | printk(KERN_WARNING |
1541 | "EXT4-fs warning: maximal mount count reached, " | |
1542 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1543 | else if (le32_to_cpu(es->s_checkinterval) && |
1544 | (le32_to_cpu(es->s_lastcheck) + | |
1545 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1546 | printk(KERN_WARNING |
1547 | "EXT4-fs warning: checktime reached, " | |
1548 | "running e2fsck is recommended\n"); | |
0390131b FM |
1549 | if (!sbi->s_journal) |
1550 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); | |
ac27a0ec | 1551 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1552 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1553 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1554 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1555 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1556 | if (sbi->s_journal) |
1557 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1558 | |
617ba13b | 1559 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1560 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1561 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
ac27a0ec DK |
1562 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1563 | sb->s_blocksize, | |
1564 | sbi->s_groups_count, | |
617ba13b MC |
1565 | EXT4_BLOCKS_PER_GROUP(sb), |
1566 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1567 | sbi->s_mount_opt); |
1568 | ||
0390131b FM |
1569 | if (EXT4_SB(sb)->s_journal) { |
1570 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", | |
1571 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1572 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
1573 | } else { | |
1574 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); | |
1575 | } | |
ac27a0ec DK |
1576 | return res; |
1577 | } | |
1578 | ||
772cb7c8 JS |
1579 | static int ext4_fill_flex_info(struct super_block *sb) |
1580 | { | |
1581 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1582 | struct ext4_group_desc *gdp = NULL; | |
1583 | struct buffer_head *bh; | |
1584 | ext4_group_t flex_group_count; | |
1585 | ext4_group_t flex_group; | |
1586 | int groups_per_flex = 0; | |
772cb7c8 JS |
1587 | int i; |
1588 | ||
1589 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1590 | sbi->s_log_groups_per_flex = 0; | |
1591 | return 1; | |
1592 | } | |
1593 | ||
1594 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1595 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1596 | ||
c62a11fd FB |
1597 | /* We allocate both existing and potentially added groups */ |
1598 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1599 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1600 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
ec05e868 | 1601 | sbi->s_flex_groups = kzalloc(flex_group_count * |
772cb7c8 JS |
1602 | sizeof(struct flex_groups), GFP_KERNEL); |
1603 | if (sbi->s_flex_groups == NULL) { | |
ec05e868 | 1604 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
a9df9a49 | 1605 | "%u flex groups\n", flex_group_count); |
772cb7c8 JS |
1606 | goto failed; |
1607 | } | |
772cb7c8 | 1608 | |
772cb7c8 JS |
1609 | for (i = 0; i < sbi->s_groups_count; i++) { |
1610 | gdp = ext4_get_group_desc(sb, i, &bh); | |
1611 | ||
1612 | flex_group = ext4_flex_group(sbi, i); | |
1613 | sbi->s_flex_groups[flex_group].free_inodes += | |
560671a0 | 1614 | ext4_free_inodes_count(sb, gdp); |
772cb7c8 | 1615 | sbi->s_flex_groups[flex_group].free_blocks += |
560671a0 | 1616 | ext4_free_blks_count(sb, gdp); |
772cb7c8 JS |
1617 | } |
1618 | ||
1619 | return 1; | |
1620 | failed: | |
1621 | return 0; | |
1622 | } | |
1623 | ||
717d50e4 AD |
1624 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1625 | struct ext4_group_desc *gdp) | |
1626 | { | |
1627 | __u16 crc = 0; | |
1628 | ||
1629 | if (sbi->s_es->s_feature_ro_compat & | |
1630 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1631 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1632 | __le32 le_group = cpu_to_le32(block_group); | |
1633 | ||
1634 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1635 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1636 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1637 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1638 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1639 | if ((sbi->s_es->s_feature_incompat & | |
1640 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1641 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1642 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1643 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1644 | offset); | |
1645 | } | |
1646 | ||
1647 | return cpu_to_le16(crc); | |
1648 | } | |
1649 | ||
1650 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1651 | struct ext4_group_desc *gdp) | |
1652 | { | |
1653 | if ((sbi->s_es->s_feature_ro_compat & | |
1654 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1655 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1656 | return 0; | |
1657 | ||
1658 | return 1; | |
1659 | } | |
1660 | ||
ac27a0ec | 1661 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1662 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1663 | { |
617ba13b MC |
1664 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1665 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1666 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1667 | ext4_fsblk_t block_bitmap; |
1668 | ext4_fsblk_t inode_bitmap; | |
1669 | ext4_fsblk_t inode_table; | |
ce421581 | 1670 | int flexbg_flag = 0; |
fd2d4291 | 1671 | ext4_group_t i; |
ac27a0ec | 1672 | |
ce421581 JS |
1673 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1674 | flexbg_flag = 1; | |
1675 | ||
af5bc92d | 1676 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1677 | |
197cd65a AM |
1678 | for (i = 0; i < sbi->s_groups_count; i++) { |
1679 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1680 | ||
ce421581 | 1681 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1682 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1683 | else |
1684 | last_block = first_block + | |
617ba13b | 1685 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1686 | |
8fadc143 | 1687 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1688 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 | 1689 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1690 | "Block bitmap for group %u not in group " |
5128273a | 1691 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1692 | return 0; |
1693 | } | |
8fadc143 | 1694 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1695 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 | 1696 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1697 | "Inode bitmap for group %u not in group " |
5128273a | 1698 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1699 | return 0; |
1700 | } | |
8fadc143 | 1701 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1702 | if (inode_table < first_block || |
2b2d6d01 | 1703 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 | 1704 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1705 | "Inode table for group %u not in group " |
5128273a | 1706 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1707 | return 0; |
1708 | } | |
b5f10eed | 1709 | spin_lock(sb_bgl_lock(sbi, i)); |
717d50e4 | 1710 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 | 1711 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1712 | "Checksum for group %u failed (%u!=%u)\n", |
c19204b0 JB |
1713 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
1714 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c LZ |
1715 | if (!(sb->s_flags & MS_RDONLY)) { |
1716 | spin_unlock(sb_bgl_lock(sbi, i)); | |
8a266467 | 1717 | return 0; |
7ee1ec4c | 1718 | } |
717d50e4 | 1719 | } |
b5f10eed | 1720 | spin_unlock(sb_bgl_lock(sbi, i)); |
ce421581 JS |
1721 | if (!flexbg_flag) |
1722 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1723 | } |
1724 | ||
bd81d8ee | 1725 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
2b2d6d01 | 1726 | sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1727 | return 1; |
1728 | } | |
1729 | ||
617ba13b | 1730 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1731 | * the superblock) which were deleted from all directories, but held open by |
1732 | * a process at the time of a crash. We walk the list and try to delete these | |
1733 | * inodes at recovery time (only with a read-write filesystem). | |
1734 | * | |
1735 | * In order to keep the orphan inode chain consistent during traversal (in | |
1736 | * case of crash during recovery), we link each inode into the superblock | |
1737 | * orphan list_head and handle it the same way as an inode deletion during | |
1738 | * normal operation (which journals the operations for us). | |
1739 | * | |
1740 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1741 | * accidentally point at an in-use or already deleted inode. The worst that | |
1742 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1743 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1744 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1745 | * inode cleanup for us, so we can safely abort without any further action. | |
1746 | */ | |
2b2d6d01 TT |
1747 | static void ext4_orphan_cleanup(struct super_block *sb, |
1748 | struct ext4_super_block *es) | |
ac27a0ec DK |
1749 | { |
1750 | unsigned int s_flags = sb->s_flags; | |
1751 | int nr_orphans = 0, nr_truncates = 0; | |
1752 | #ifdef CONFIG_QUOTA | |
1753 | int i; | |
1754 | #endif | |
1755 | if (!es->s_last_orphan) { | |
1756 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1757 | return; | |
1758 | } | |
1759 | ||
a8f48a95 ES |
1760 | if (bdev_read_only(sb->s_bdev)) { |
1761 | printk(KERN_ERR "EXT4-fs: write access " | |
1762 | "unavailable, skipping orphan cleanup.\n"); | |
1763 | return; | |
1764 | } | |
1765 | ||
617ba13b | 1766 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1767 | if (es->s_last_orphan) |
1768 | jbd_debug(1, "Errors on filesystem, " | |
1769 | "clearing orphan list.\n"); | |
1770 | es->s_last_orphan = 0; | |
1771 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1772 | return; | |
1773 | } | |
1774 | ||
1775 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1776 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1777 | sb->s_id); |
1778 | sb->s_flags &= ~MS_RDONLY; | |
1779 | } | |
1780 | #ifdef CONFIG_QUOTA | |
1781 | /* Needed for iput() to work correctly and not trash data */ | |
1782 | sb->s_flags |= MS_ACTIVE; | |
1783 | /* Turn on quotas so that they are updated correctly */ | |
1784 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1785 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1786 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1787 | if (ret < 0) |
1788 | printk(KERN_ERR | |
2c8be6b2 | 1789 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1790 | "quota: error %d\n", ret); |
1791 | } | |
1792 | } | |
1793 | #endif | |
1794 | ||
1795 | while (es->s_last_orphan) { | |
1796 | struct inode *inode; | |
1797 | ||
97bd42b9 JB |
1798 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1799 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1800 | es->s_last_orphan = 0; |
1801 | break; | |
1802 | } | |
1803 | ||
617ba13b | 1804 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
ac27a0ec DK |
1805 | DQUOT_INIT(inode); |
1806 | if (inode->i_nlink) { | |
1807 | printk(KERN_DEBUG | |
e5f8eab8 | 1808 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1809 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1810 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1811 | inode->i_ino, inode->i_size); |
617ba13b | 1812 | ext4_truncate(inode); |
ac27a0ec DK |
1813 | nr_truncates++; |
1814 | } else { | |
1815 | printk(KERN_DEBUG | |
1816 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1817 | __func__, inode->i_ino); |
ac27a0ec DK |
1818 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1819 | inode->i_ino); | |
1820 | nr_orphans++; | |
1821 | } | |
1822 | iput(inode); /* The delete magic happens here! */ | |
1823 | } | |
1824 | ||
2b2d6d01 | 1825 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1826 | |
1827 | if (nr_orphans) | |
617ba13b | 1828 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1829 | sb->s_id, PLURAL(nr_orphans)); |
1830 | if (nr_truncates) | |
617ba13b | 1831 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1832 | sb->s_id, PLURAL(nr_truncates)); |
1833 | #ifdef CONFIG_QUOTA | |
1834 | /* Turn quotas off */ | |
1835 | for (i = 0; i < MAXQUOTAS; i++) { | |
1836 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1837 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1838 | } |
1839 | #endif | |
1840 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1841 | } | |
cd2291a4 ES |
1842 | /* |
1843 | * Maximal extent format file size. | |
1844 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1845 | * extent format containers, within a sector_t, and within i_blocks | |
1846 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1847 | * so that won't be a limiting factor. | |
1848 | * | |
1849 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1850 | */ | |
f287a1a5 | 1851 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1852 | { |
1853 | loff_t res; | |
1854 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1855 | ||
1856 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1857 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1858 | /* |
b3a6ffe1 | 1859 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1860 | * i_block represent total blocks in 512 bytes |
1861 | * 32 == size of vfs inode i_blocks * 8 | |
1862 | */ | |
1863 | upper_limit = (1LL << 32) - 1; | |
1864 | ||
1865 | /* total blocks in file system block size */ | |
1866 | upper_limit >>= (blkbits - 9); | |
1867 | upper_limit <<= blkbits; | |
1868 | } | |
1869 | ||
1870 | /* 32-bit extent-start container, ee_block */ | |
1871 | res = 1LL << 32; | |
1872 | res <<= blkbits; | |
1873 | res -= 1; | |
1874 | ||
1875 | /* Sanity check against vm- & vfs- imposed limits */ | |
1876 | if (res > upper_limit) | |
1877 | res = upper_limit; | |
1878 | ||
1879 | return res; | |
1880 | } | |
ac27a0ec | 1881 | |
ac27a0ec | 1882 | /* |
cd2291a4 | 1883 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1884 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1885 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1886 | */ |
f287a1a5 | 1887 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1888 | { |
617ba13b | 1889 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1890 | int meta_blocks; |
1891 | loff_t upper_limit; | |
1892 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1893 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1894 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1895 | * does not exceed 2^48 -1 |
1896 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1897 | * total number of 512 bytes blocks of the file | |
1898 | */ | |
1899 | ||
f287a1a5 | 1900 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1901 | /* |
b3a6ffe1 | 1902 | * !has_huge_files or CONFIG_LBD is not enabled |
f287a1a5 TT |
1903 | * implies the inode i_block represent total blocks in |
1904 | * 512 bytes 32 == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1905 | */ |
1906 | upper_limit = (1LL << 32) - 1; | |
1907 | ||
1908 | /* total blocks in file system block size */ | |
1909 | upper_limit >>= (bits - 9); | |
1910 | ||
1911 | } else { | |
8180a562 AK |
1912 | /* |
1913 | * We use 48 bit ext4_inode i_blocks | |
1914 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
1915 | * represent total number of blocks in | |
1916 | * file system block size | |
1917 | */ | |
0fc1b451 AK |
1918 | upper_limit = (1LL << 48) - 1; |
1919 | ||
0fc1b451 AK |
1920 | } |
1921 | ||
1922 | /* indirect blocks */ | |
1923 | meta_blocks = 1; | |
1924 | /* double indirect blocks */ | |
1925 | meta_blocks += 1 + (1LL << (bits-2)); | |
1926 | /* tripple indirect blocks */ | |
1927 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1928 | ||
1929 | upper_limit -= meta_blocks; | |
1930 | upper_limit <<= bits; | |
ac27a0ec DK |
1931 | |
1932 | res += 1LL << (bits-2); | |
1933 | res += 1LL << (2*(bits-2)); | |
1934 | res += 1LL << (3*(bits-2)); | |
1935 | res <<= bits; | |
1936 | if (res > upper_limit) | |
1937 | res = upper_limit; | |
0fc1b451 AK |
1938 | |
1939 | if (res > MAX_LFS_FILESIZE) | |
1940 | res = MAX_LFS_FILESIZE; | |
1941 | ||
ac27a0ec DK |
1942 | return res; |
1943 | } | |
1944 | ||
617ba13b | 1945 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1946 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1947 | { |
617ba13b | 1948 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 1949 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
1950 | int has_super = 0; |
1951 | ||
1952 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
1953 | ||
617ba13b | 1954 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 1955 | nr < first_meta_bg) |
70bbb3e0 | 1956 | return logical_sb_block + nr + 1; |
ac27a0ec | 1957 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 1958 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 1959 | has_super = 1; |
617ba13b | 1960 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
1961 | } |
1962 | ||
c9de560d AT |
1963 | /** |
1964 | * ext4_get_stripe_size: Get the stripe size. | |
1965 | * @sbi: In memory super block info | |
1966 | * | |
1967 | * If we have specified it via mount option, then | |
1968 | * use the mount option value. If the value specified at mount time is | |
1969 | * greater than the blocks per group use the super block value. | |
1970 | * If the super block value is greater than blocks per group return 0. | |
1971 | * Allocator needs it be less than blocks per group. | |
1972 | * | |
1973 | */ | |
1974 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
1975 | { | |
1976 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
1977 | unsigned long stripe_width = | |
1978 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
1979 | ||
1980 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
1981 | return sbi->s_stripe; | |
1982 | ||
1983 | if (stripe_width <= sbi->s_blocks_per_group) | |
1984 | return stripe_width; | |
1985 | ||
1986 | if (stride <= sbi->s_blocks_per_group) | |
1987 | return stride; | |
1988 | ||
1989 | return 0; | |
1990 | } | |
ac27a0ec | 1991 | |
2b2d6d01 | 1992 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
1993 | __releases(kernel_lock) |
1994 | __acquires(kernel_lock) | |
1d03ec98 | 1995 | |
ac27a0ec | 1996 | { |
2b2d6d01 | 1997 | struct buffer_head *bh; |
617ba13b MC |
1998 | struct ext4_super_block *es = NULL; |
1999 | struct ext4_sb_info *sbi; | |
2000 | ext4_fsblk_t block; | |
2001 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2002 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2003 | unsigned long offset = 0; |
ac27a0ec DK |
2004 | unsigned long journal_devnum = 0; |
2005 | unsigned long def_mount_opts; | |
2006 | struct inode *root; | |
9f6200bb | 2007 | char *cp; |
0390131b | 2008 | const char *descr; |
1d1fe1ee | 2009 | int ret = -EINVAL; |
ac27a0ec | 2010 | int blocksize; |
4ec11028 TT |
2011 | unsigned int db_count; |
2012 | unsigned int i; | |
f287a1a5 | 2013 | int needs_recovery, has_huge_files; |
3a06d778 | 2014 | int features; |
bd81d8ee | 2015 | __u64 blocks_count; |
833f4077 | 2016 | int err; |
b3881f74 | 2017 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2018 | |
2019 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2020 | if (!sbi) | |
2021 | return -ENOMEM; | |
2022 | sb->s_fs_info = sbi; | |
2023 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2024 | sbi->s_resuid = EXT4_DEF_RESUID; |
2025 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2026 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2027 | sbi->s_sb_block = sb_block; |
ac27a0ec DK |
2028 | |
2029 | unlock_kernel(); | |
2030 | ||
9f6200bb TT |
2031 | /* Cleanup superblock name */ |
2032 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2033 | *cp = '!'; | |
2034 | ||
617ba13b | 2035 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2036 | if (!blocksize) { |
617ba13b | 2037 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
2038 | goto out_fail; |
2039 | } | |
2040 | ||
2041 | /* | |
617ba13b | 2042 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2043 | * block sizes. We need to calculate the offset from buffer start. |
2044 | */ | |
617ba13b | 2045 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2046 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2047 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2048 | } else { |
70bbb3e0 | 2049 | logical_sb_block = sb_block; |
ac27a0ec DK |
2050 | } |
2051 | ||
70bbb3e0 | 2052 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 2053 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
2054 | goto out_fail; |
2055 | } | |
2056 | /* | |
2057 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2058 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2059 | */ |
617ba13b | 2060 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2061 | sbi->s_es = es; |
2062 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2063 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2064 | goto cantfind_ext4; | |
ac27a0ec DK |
2065 | |
2066 | /* Set defaults before we parse the mount options */ | |
2067 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2068 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2069 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2070 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2071 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2072 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2073 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2074 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2075 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2076 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2077 | #endif |
03010a33 | 2078 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2079 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2080 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2081 | #endif |
617ba13b MC |
2082 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2083 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2084 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2085 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2086 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2087 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2088 | ||
2089 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2090 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2091 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2092 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2093 | else |
2094 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2095 | |
2096 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2097 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2098 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2099 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2100 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec DK |
2101 | |
2102 | set_opt(sbi->s_mount_opt, RESERVATION); | |
571640ca | 2103 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2104 | |
dd919b98 AK |
2105 | /* |
2106 | * enable delayed allocation by default | |
2107 | * Use -o nodelalloc to turn it off | |
2108 | */ | |
2109 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2110 | ||
2111 | ||
b3881f74 TT |
2112 | if (!parse_options((char *) data, sb, &journal_devnum, |
2113 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2114 | goto failed_mount; |
2115 | ||
2116 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2117 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2118 | |
617ba13b MC |
2119 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2120 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2121 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2122 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 2123 | printk(KERN_WARNING |
617ba13b | 2124 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 2125 | "running e2fsck is recommended\n"); |
469108ff | 2126 | |
ac27a0ec DK |
2127 | /* |
2128 | * Check feature flags regardless of the revision level, since we | |
2129 | * previously didn't change the revision level when setting the flags, | |
2130 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2131 | */ | |
617ba13b | 2132 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2133 | if (features) { |
617ba13b | 2134 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
3a06d778 AK |
2135 | "unsupported optional features (%x).\n", sb->s_id, |
2136 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2137 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
ac27a0ec DK |
2138 | goto failed_mount; |
2139 | } | |
617ba13b | 2140 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2141 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2142 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
3a06d778 AK |
2143 | "unsupported optional features (%x).\n", sb->s_id, |
2144 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2145 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
2146 | goto failed_mount; |
2147 | } | |
f287a1a5 TT |
2148 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2149 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2150 | if (has_huge_files) { | |
0fc1b451 AK |
2151 | /* |
2152 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2153 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2154 | */ |
2155 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2156 | !(sb->s_flags & MS_RDONLY)) { | |
2157 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2158 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2159 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2160 | goto failed_mount; |
2161 | } | |
2162 | } | |
ac27a0ec DK |
2163 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2164 | ||
617ba13b MC |
2165 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2166 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2167 | printk(KERN_ERR |
617ba13b | 2168 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2169 | blocksize, sb->s_id); |
2170 | goto failed_mount; | |
2171 | } | |
2172 | ||
ac27a0ec | 2173 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2174 | |
2175 | /* Validate the filesystem blocksize */ | |
2176 | if (!sb_set_blocksize(sb, blocksize)) { | |
2177 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2178 | blocksize); | |
ac27a0ec DK |
2179 | goto failed_mount; |
2180 | } | |
2181 | ||
2b2d6d01 | 2182 | brelse(bh); |
70bbb3e0 AM |
2183 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2184 | offset = do_div(logical_sb_block, blocksize); | |
2185 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2186 | if (!bh) { |
2187 | printk(KERN_ERR | |
617ba13b | 2188 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2189 | goto failed_mount; |
2190 | } | |
617ba13b | 2191 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2192 | sbi->s_es = es; |
617ba13b | 2193 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2194 | printk(KERN_ERR |
2195 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2196 | goto failed_mount; |
2197 | } | |
2198 | } | |
2199 | ||
f287a1a5 TT |
2200 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2201 | has_huge_files); | |
2202 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2203 | |
617ba13b MC |
2204 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2205 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2206 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2207 | } else { |
2208 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2209 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2210 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2211 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2212 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2213 | printk(KERN_ERR |
2214 | "EXT4-fs: unsupported inode size: %d\n", | |
2215 | sbi->s_inode_size); | |
ac27a0ec DK |
2216 | goto failed_mount; |
2217 | } | |
ef7f3835 KS |
2218 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2219 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2220 | } |
0d1ee42f AR |
2221 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2222 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2223 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2224 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2225 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2226 | printk(KERN_ERR |
8fadc143 | 2227 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2228 | sbi->s_desc_size); |
2229 | goto failed_mount; | |
2230 | } | |
2231 | } else | |
2232 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2233 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2234 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2235 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2236 | goto cantfind_ext4; |
2237 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2238 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2239 | goto cantfind_ext4; |
ac27a0ec DK |
2240 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2241 | sbi->s_inodes_per_block; | |
0d1ee42f | 2242 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2243 | sbi->s_sbh = bh; |
2244 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2245 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2246 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
2b2d6d01 | 2247 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2248 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2249 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2250 | i = le32_to_cpu(es->s_flags); |
2251 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2252 | sbi->s_hash_unsigned = 3; | |
2253 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2254 | #ifdef __CHAR_UNSIGNED__ | |
2255 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2256 | sbi->s_hash_unsigned = 3; | |
2257 | #else | |
2258 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2259 | #endif | |
2260 | sb->s_dirt = 1; | |
2261 | } | |
ac27a0ec DK |
2262 | |
2263 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2264 | printk(KERN_ERR |
2265 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2266 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2267 | goto failed_mount; |
2268 | } | |
ac27a0ec | 2269 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2270 | printk(KERN_ERR |
2271 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2272 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2273 | goto failed_mount; |
2274 | } | |
2275 | ||
bd81d8ee | 2276 | if (ext4_blocks_count(es) > |
ac27a0ec | 2277 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2278 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2279 | " too large to mount safely\n", sb->s_id); |
2280 | if (sizeof(sector_t) < 8) | |
617ba13b | 2281 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2282 | "enabled\n"); |
2283 | goto failed_mount; | |
2284 | } | |
2285 | ||
617ba13b MC |
2286 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2287 | goto cantfind_ext4; | |
e7c95593 | 2288 | |
4ec11028 TT |
2289 | /* |
2290 | * It makes no sense for the first data block to be beyond the end | |
2291 | * of the filesystem. | |
2292 | */ | |
2293 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
2294 | printk(KERN_WARNING "EXT4-fs: bad geometry: first data" | |
2295 | "block %u is beyond end of filesystem (%llu)\n", | |
2296 | le32_to_cpu(es->s_first_data_block), | |
2297 | ext4_blocks_count(es)); | |
e7c95593 ES |
2298 | goto failed_mount; |
2299 | } | |
bd81d8ee LV |
2300 | blocks_count = (ext4_blocks_count(es) - |
2301 | le32_to_cpu(es->s_first_data_block) + | |
2302 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2303 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 TT |
2304 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
2305 | printk(KERN_WARNING "EXT4-fs: groups count too large: %u " | |
2306 | "(block count %llu, first data block %u, " | |
2307 | "blocks per group %lu)\n", sbi->s_groups_count, | |
2308 | ext4_blocks_count(es), | |
2309 | le32_to_cpu(es->s_first_data_block), | |
2310 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2311 | goto failed_mount; | |
2312 | } | |
bd81d8ee | 2313 | sbi->s_groups_count = blocks_count; |
617ba13b MC |
2314 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2315 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2316 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2317 | GFP_KERNEL); |
2318 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2319 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2320 | goto failed_mount; |
2321 | } | |
2322 | ||
3244fcb1 | 2323 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2324 | if (ext4_proc_root) |
2325 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
2326 | ||
240799cd TT |
2327 | if (sbi->s_proc) |
2328 | proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, | |
2329 | &ext4_ui_proc_fops, | |
2330 | &sbi->s_inode_readahead_blks); | |
3244fcb1 | 2331 | #endif |
240799cd | 2332 | |
ac27a0ec DK |
2333 | bgl_lock_init(&sbi->s_blockgroup_lock); |
2334 | ||
2335 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2336 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2337 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2338 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2339 | printk(KERN_ERR "EXT4-fs: " |
2340 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2341 | db_count = i; |
2342 | goto failed_mount2; | |
2343 | } | |
2344 | } | |
2b2d6d01 | 2345 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2346 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2347 | goto failed_mount2; |
2348 | } | |
772cb7c8 JS |
2349 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2350 | if (!ext4_fill_flex_info(sb)) { | |
2351 | printk(KERN_ERR | |
2352 | "EXT4-fs: unable to initialize " | |
2353 | "flex_bg meta info!\n"); | |
2354 | goto failed_mount2; | |
2355 | } | |
2356 | ||
ac27a0ec DK |
2357 | sbi->s_gdb_count = db_count; |
2358 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2359 | spin_lock_init(&sbi->s_next_gen_lock); | |
2360 | ||
833f4077 PZ |
2361 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2362 | ext4_count_free_blocks(sb)); | |
2363 | if (!err) { | |
2364 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2365 | ext4_count_free_inodes(sb)); | |
2366 | } | |
2367 | if (!err) { | |
2368 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2369 | ext4_count_dirs(sb)); | |
2370 | } | |
6bc6e63f AK |
2371 | if (!err) { |
2372 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2373 | } | |
833f4077 PZ |
2374 | if (err) { |
2375 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2376 | goto failed_mount3; | |
2377 | } | |
ac27a0ec | 2378 | |
c9de560d AT |
2379 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2380 | ||
ac27a0ec DK |
2381 | /* |
2382 | * set up enough so that it can read an inode | |
2383 | */ | |
617ba13b MC |
2384 | sb->s_op = &ext4_sops; |
2385 | sb->s_export_op = &ext4_export_ops; | |
2386 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2387 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2388 | sb->s_qcop = &ext4_qctl_operations; |
2389 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2390 | #endif |
2391 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
2392 | ||
2393 | sb->s_root = NULL; | |
2394 | ||
2395 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2396 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2397 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2398 | |
2399 | /* | |
2400 | * The first inode we look at is the journal inode. Don't try | |
2401 | * root first: it may be modified in the journal! | |
2402 | */ | |
2403 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2404 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2405 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2406 | goto failed_mount3; |
624080ed TT |
2407 | if (!(sb->s_flags & MS_RDONLY) && |
2408 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2409 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2410 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2411 | "%u is corrupt\n", sb->s_id, |
624080ed | 2412 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2413 | if (test_opt(sb, ERRORS_RO)) { |
2414 | printk(KERN_CRIT | |
2415 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2416 | sb->s_flags |= MS_RDONLY; |
2417 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2418 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2419 | } | |
2420 | if (test_opt(sb, ERRORS_PANIC)) { | |
2421 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2422 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2423 | ext4_commit_super(sb, es, 1); | |
624080ed TT |
2424 | goto failed_mount4; |
2425 | } | |
2426 | } | |
0390131b FM |
2427 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2428 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
2429 | printk(KERN_ERR "EXT4-fs: required journal recovery " | |
2430 | "suppressed and not mounted read-only\n"); | |
2431 | goto failed_mount4; | |
ac27a0ec | 2432 | } else { |
0390131b FM |
2433 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2434 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2435 | sbi->s_journal = NULL; | |
2436 | needs_recovery = 0; | |
2437 | goto no_journal; | |
ac27a0ec DK |
2438 | } |
2439 | ||
eb40a09c JS |
2440 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2441 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2442 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
abda1418 | 2443 | printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); |
eb40a09c JS |
2444 | goto failed_mount4; |
2445 | } | |
2446 | ||
818d276c GS |
2447 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2448 | jbd2_journal_set_features(sbi->s_journal, | |
2449 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2450 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2451 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2452 | jbd2_journal_set_features(sbi->s_journal, | |
2453 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2454 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2455 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2456 | } else { | |
2457 | jbd2_journal_clear_features(sbi->s_journal, | |
2458 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2459 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2460 | } | |
2461 | ||
ac27a0ec DK |
2462 | /* We have now updated the journal if required, so we can |
2463 | * validate the data journaling mode. */ | |
2464 | switch (test_opt(sb, DATA_FLAGS)) { | |
2465 | case 0: | |
2466 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2467 | * capabilities: ORDERED_DATA if the journal can |
2468 | * cope, else JOURNAL_DATA | |
2469 | */ | |
dab291af MC |
2470 | if (jbd2_journal_check_available_features |
2471 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2472 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2473 | else | |
2474 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2475 | break; | |
2476 | ||
617ba13b MC |
2477 | case EXT4_MOUNT_ORDERED_DATA: |
2478 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2479 | if (!jbd2_journal_check_available_features |
2480 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2481 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2482 | "requested data journaling mode\n"); |
2483 | goto failed_mount4; | |
2484 | } | |
2485 | default: | |
2486 | break; | |
2487 | } | |
b3881f74 | 2488 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2489 | |
0390131b | 2490 | no_journal: |
ac27a0ec DK |
2491 | |
2492 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2493 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2494 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2495 | "its supported only with writeback mode\n"); |
2496 | clear_opt(sbi->s_mount_opt, NOBH); | |
2497 | } | |
2498 | } | |
2499 | /* | |
dab291af | 2500 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2501 | * so we can safely mount the rest of the filesystem now. |
2502 | */ | |
2503 | ||
1d1fe1ee DH |
2504 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2505 | if (IS_ERR(root)) { | |
617ba13b | 2506 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2507 | ret = PTR_ERR(root); |
ac27a0ec DK |
2508 | goto failed_mount4; |
2509 | } | |
2510 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2511 | iput(root); |
617ba13b | 2512 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2513 | goto failed_mount4; |
2514 | } | |
1d1fe1ee DH |
2515 | sb->s_root = d_alloc_root(root); |
2516 | if (!sb->s_root) { | |
2517 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2518 | iput(root); | |
2519 | ret = -ENOMEM; | |
2520 | goto failed_mount4; | |
2521 | } | |
ac27a0ec | 2522 | |
2b2d6d01 | 2523 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2524 | |
2525 | /* determine the minimum size of new large inodes, if present */ | |
2526 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2527 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2528 | EXT4_GOOD_OLD_INODE_SIZE; | |
2529 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2530 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2531 | if (sbi->s_want_extra_isize < | |
2532 | le16_to_cpu(es->s_want_extra_isize)) | |
2533 | sbi->s_want_extra_isize = | |
2534 | le16_to_cpu(es->s_want_extra_isize); | |
2535 | if (sbi->s_want_extra_isize < | |
2536 | le16_to_cpu(es->s_min_extra_isize)) | |
2537 | sbi->s_want_extra_isize = | |
2538 | le16_to_cpu(es->s_min_extra_isize); | |
2539 | } | |
2540 | } | |
2541 | /* Check if enough inode space is available */ | |
2542 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2543 | sbi->s_inode_size) { | |
2544 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2545 | EXT4_GOOD_OLD_INODE_SIZE; | |
2546 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2547 | "available.\n"); | |
2548 | } | |
2549 | ||
c2774d84 AK |
2550 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2551 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2552 | "requested data journaling mode\n"); | |
2553 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2554 | } else if (test_opt(sb, DELALLOC)) | |
2555 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2556 | ||
2557 | ext4_ext_init(sb); | |
2558 | err = ext4_mb_init(sb, needs_recovery); | |
2559 | if (err) { | |
2560 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2561 | err); | |
2562 | goto failed_mount4; | |
2563 | } | |
2564 | ||
ac27a0ec DK |
2565 | /* |
2566 | * akpm: core read_super() calls in here with the superblock locked. | |
2567 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
2568 | * in numerous places. Here we just pop the lock - it's relatively | |
2569 | * harmless, because we are now ready to accept write_super() requests, | |
2570 | * and aviro says that's the only reason for hanging onto the | |
2571 | * superblock lock. | |
2572 | */ | |
617ba13b MC |
2573 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2574 | ext4_orphan_cleanup(sb, es); | |
2575 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2576 | if (needs_recovery) { |
2b2d6d01 | 2577 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
0390131b FM |
2578 | ext4_mark_recovery_complete(sb, es); |
2579 | } | |
2580 | if (EXT4_SB(sb)->s_journal) { | |
2581 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2582 | descr = " journalled data mode"; | |
2583 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2584 | descr = " ordered data mode"; | |
2585 | else | |
2586 | descr = " writeback data mode"; | |
2587 | } else | |
2588 | descr = "out journal"; | |
2589 | ||
2590 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", | |
2591 | sb->s_id, descr); | |
ac27a0ec DK |
2592 | |
2593 | lock_kernel(); | |
2594 | return 0; | |
2595 | ||
617ba13b | 2596 | cantfind_ext4: |
ac27a0ec | 2597 | if (!silent) |
617ba13b | 2598 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2599 | sb->s_id); |
2600 | goto failed_mount; | |
2601 | ||
2602 | failed_mount4: | |
0390131b FM |
2603 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
2604 | if (sbi->s_journal) { | |
2605 | jbd2_journal_destroy(sbi->s_journal); | |
2606 | sbi->s_journal = NULL; | |
2607 | } | |
ac27a0ec DK |
2608 | failed_mount3: |
2609 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2610 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2611 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2612 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2613 | failed_mount2: |
2614 | for (i = 0; i < db_count; i++) | |
2615 | brelse(sbi->s_group_desc[i]); | |
2616 | kfree(sbi->s_group_desc); | |
2617 | failed_mount: | |
240799cd TT |
2618 | if (sbi->s_proc) { |
2619 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); | |
9f6200bb | 2620 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2621 | } |
ac27a0ec DK |
2622 | #ifdef CONFIG_QUOTA |
2623 | for (i = 0; i < MAXQUOTAS; i++) | |
2624 | kfree(sbi->s_qf_names[i]); | |
2625 | #endif | |
617ba13b | 2626 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2627 | brelse(bh); |
2628 | out_fail: | |
2629 | sb->s_fs_info = NULL; | |
2630 | kfree(sbi); | |
2631 | lock_kernel(); | |
1d1fe1ee | 2632 | return ret; |
ac27a0ec DK |
2633 | } |
2634 | ||
2635 | /* | |
2636 | * Setup any per-fs journal parameters now. We'll do this both on | |
2637 | * initial mount, once the journal has been initialised but before we've | |
2638 | * done any recovery; and again on any subsequent remount. | |
2639 | */ | |
617ba13b | 2640 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2641 | { |
617ba13b | 2642 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2643 | |
30773840 TT |
2644 | journal->j_commit_interval = sbi->s_commit_interval; |
2645 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2646 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2647 | |
2648 | spin_lock(&journal->j_state_lock); | |
2649 | if (test_opt(sb, BARRIER)) | |
dab291af | 2650 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2651 | else |
dab291af | 2652 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2653 | if (test_opt(sb, DATA_ERR_ABORT)) |
2654 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2655 | else | |
2656 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2657 | spin_unlock(&journal->j_state_lock); |
2658 | } | |
2659 | ||
617ba13b | 2660 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2661 | unsigned int journal_inum) |
2662 | { | |
2663 | struct inode *journal_inode; | |
2664 | journal_t *journal; | |
2665 | ||
0390131b FM |
2666 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2667 | ||
ac27a0ec DK |
2668 | /* First, test for the existence of a valid inode on disk. Bad |
2669 | * things happen if we iget() an unused inode, as the subsequent | |
2670 | * iput() will try to delete it. */ | |
2671 | ||
1d1fe1ee DH |
2672 | journal_inode = ext4_iget(sb, journal_inum); |
2673 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2674 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2675 | return NULL; |
2676 | } | |
2677 | if (!journal_inode->i_nlink) { | |
2678 | make_bad_inode(journal_inode); | |
2679 | iput(journal_inode); | |
617ba13b | 2680 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2681 | return NULL; |
2682 | } | |
2683 | ||
e5f8eab8 | 2684 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2685 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2686 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2687 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2688 | iput(journal_inode); |
2689 | return NULL; | |
2690 | } | |
2691 | ||
dab291af | 2692 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2693 | if (!journal) { |
617ba13b | 2694 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2695 | iput(journal_inode); |
2696 | return NULL; | |
2697 | } | |
2698 | journal->j_private = sb; | |
617ba13b | 2699 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2700 | return journal; |
2701 | } | |
2702 | ||
617ba13b | 2703 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2704 | dev_t j_dev) |
2705 | { | |
2b2d6d01 | 2706 | struct buffer_head *bh; |
ac27a0ec | 2707 | journal_t *journal; |
617ba13b MC |
2708 | ext4_fsblk_t start; |
2709 | ext4_fsblk_t len; | |
ac27a0ec | 2710 | int hblock, blocksize; |
617ba13b | 2711 | ext4_fsblk_t sb_block; |
ac27a0ec | 2712 | unsigned long offset; |
2b2d6d01 | 2713 | struct ext4_super_block *es; |
ac27a0ec DK |
2714 | struct block_device *bdev; |
2715 | ||
0390131b FM |
2716 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2717 | ||
617ba13b | 2718 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2719 | if (bdev == NULL) |
2720 | return NULL; | |
2721 | ||
2722 | if (bd_claim(bdev, sb)) { | |
2723 | printk(KERN_ERR | |
abda1418 | 2724 | "EXT4-fs: failed to claim external journal device.\n"); |
9a1c3542 | 2725 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
2726 | return NULL; |
2727 | } | |
2728 | ||
2729 | blocksize = sb->s_blocksize; | |
2730 | hblock = bdev_hardsect_size(bdev); | |
2731 | if (blocksize < hblock) { | |
2732 | printk(KERN_ERR | |
617ba13b | 2733 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2734 | goto out_bdev; |
2735 | } | |
2736 | ||
617ba13b MC |
2737 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2738 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2739 | set_blocksize(bdev, blocksize); |
2740 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2741 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2742 | "external journal\n"); |
2743 | goto out_bdev; | |
2744 | } | |
2745 | ||
617ba13b MC |
2746 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2747 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2748 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2749 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
2750 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
2751 | "bad superblock\n"); |
2752 | brelse(bh); | |
2753 | goto out_bdev; | |
2754 | } | |
2755 | ||
617ba13b MC |
2756 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
2757 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
2758 | brelse(bh); |
2759 | goto out_bdev; | |
2760 | } | |
2761 | ||
bd81d8ee | 2762 | len = ext4_blocks_count(es); |
ac27a0ec DK |
2763 | start = sb_block + 1; |
2764 | brelse(bh); /* we're done with the superblock */ | |
2765 | ||
dab291af | 2766 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
2767 | start, len, blocksize); |
2768 | if (!journal) { | |
617ba13b | 2769 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
2770 | goto out_bdev; |
2771 | } | |
2772 | journal->j_private = sb; | |
2773 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2774 | wait_on_buffer(journal->j_sb_buffer); | |
2775 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 2776 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
2777 | goto out_journal; |
2778 | } | |
2779 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 2780 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
2781 | "user (unsupported) - %d\n", |
2782 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2783 | goto out_journal; | |
2784 | } | |
617ba13b MC |
2785 | EXT4_SB(sb)->journal_bdev = bdev; |
2786 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
2787 | return journal; |
2788 | out_journal: | |
dab291af | 2789 | jbd2_journal_destroy(journal); |
ac27a0ec | 2790 | out_bdev: |
617ba13b | 2791 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
2792 | return NULL; |
2793 | } | |
2794 | ||
617ba13b MC |
2795 | static int ext4_load_journal(struct super_block *sb, |
2796 | struct ext4_super_block *es, | |
ac27a0ec DK |
2797 | unsigned long journal_devnum) |
2798 | { | |
2799 | journal_t *journal; | |
2800 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
2801 | dev_t journal_dev; | |
2802 | int err = 0; | |
2803 | int really_read_only; | |
2804 | ||
0390131b FM |
2805 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2806 | ||
ac27a0ec DK |
2807 | if (journal_devnum && |
2808 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 2809 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
2810 | "numbers have changed\n"); |
2811 | journal_dev = new_decode_dev(journal_devnum); | |
2812 | } else | |
2813 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2814 | ||
2815 | really_read_only = bdev_read_only(sb->s_bdev); | |
2816 | ||
2817 | /* | |
2818 | * Are we loading a blank journal or performing recovery after a | |
2819 | * crash? For recovery, we need to check in advance whether we | |
2820 | * can get read-write access to the device. | |
2821 | */ | |
2822 | ||
617ba13b | 2823 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 2824 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 2825 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
2826 | "required on readonly filesystem.\n"); |
2827 | if (really_read_only) { | |
617ba13b | 2828 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
2829 | "unavailable, cannot proceed.\n"); |
2830 | return -EROFS; | |
2831 | } | |
2b2d6d01 TT |
2832 | printk(KERN_INFO "EXT4-fs: write access will " |
2833 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
2834 | } |
2835 | } | |
2836 | ||
2837 | if (journal_inum && journal_dev) { | |
617ba13b | 2838 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
2839 | "and inode journals!\n"); |
2840 | return -EINVAL; | |
2841 | } | |
2842 | ||
2843 | if (journal_inum) { | |
617ba13b | 2844 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
2845 | return -EINVAL; |
2846 | } else { | |
617ba13b | 2847 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
2848 | return -EINVAL; |
2849 | } | |
2850 | ||
4776004f TT |
2851 | if (journal->j_flags & JBD2_BARRIER) |
2852 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
2853 | else | |
2854 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
2855 | ||
ac27a0ec | 2856 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 2857 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 2858 | if (err) { |
617ba13b | 2859 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 2860 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2861 | return err; |
2862 | } | |
2863 | } | |
2864 | ||
617ba13b | 2865 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 2866 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 2867 | if (!err) |
dab291af | 2868 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
2869 | |
2870 | if (err) { | |
617ba13b | 2871 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 2872 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2873 | return err; |
2874 | } | |
2875 | ||
617ba13b MC |
2876 | EXT4_SB(sb)->s_journal = journal; |
2877 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
2878 | |
2879 | if (journal_devnum && | |
2880 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2881 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
2882 | sb->s_dirt = 1; | |
2883 | ||
2884 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2885 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2886 | } |
2887 | ||
2888 | return 0; | |
2889 | } | |
2890 | ||
2b2d6d01 TT |
2891 | static void ext4_commit_super(struct super_block *sb, |
2892 | struct ext4_super_block *es, int sync) | |
ac27a0ec | 2893 | { |
617ba13b | 2894 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
ac27a0ec DK |
2895 | |
2896 | if (!sbh) | |
2897 | return; | |
914258bf TT |
2898 | if (buffer_write_io_error(sbh)) { |
2899 | /* | |
2900 | * Oh, dear. A previous attempt to write the | |
2901 | * superblock failed. This could happen because the | |
2902 | * USB device was yanked out. Or it could happen to | |
2903 | * be a transient write error and maybe the block will | |
2904 | * be remapped. Nothing we can do but to retry the | |
2905 | * write and hope for the best. | |
2906 | */ | |
abda1418 | 2907 | printk(KERN_ERR "EXT4-fs: previous I/O error to " |
914258bf TT |
2908 | "superblock detected for %s.\n", sb->s_id); |
2909 | clear_buffer_write_io_error(sbh); | |
2910 | set_buffer_uptodate(sbh); | |
2911 | } | |
ac27a0ec | 2912 | es->s_wtime = cpu_to_le32(get_seconds()); |
5d1b1b3f AK |
2913 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
2914 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
2915 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
2916 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
2917 | ||
ac27a0ec DK |
2918 | BUFFER_TRACE(sbh, "marking dirty"); |
2919 | mark_buffer_dirty(sbh); | |
914258bf | 2920 | if (sync) { |
ac27a0ec | 2921 | sync_dirty_buffer(sbh); |
914258bf | 2922 | if (buffer_write_io_error(sbh)) { |
abda1418 | 2923 | printk(KERN_ERR "EXT4-fs: I/O error while writing " |
914258bf TT |
2924 | "superblock for %s.\n", sb->s_id); |
2925 | clear_buffer_write_io_error(sbh); | |
2926 | set_buffer_uptodate(sbh); | |
2927 | } | |
2928 | } | |
ac27a0ec DK |
2929 | } |
2930 | ||
2931 | ||
2932 | /* | |
2933 | * Have we just finished recovery? If so, and if we are mounting (or | |
2934 | * remounting) the filesystem readonly, then we will end up with a | |
2935 | * consistent fs on disk. Record that fact. | |
2936 | */ | |
2b2d6d01 TT |
2937 | static void ext4_mark_recovery_complete(struct super_block *sb, |
2938 | struct ext4_super_block *es) | |
ac27a0ec | 2939 | { |
617ba13b | 2940 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2941 | |
0390131b FM |
2942 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2943 | BUG_ON(journal != NULL); | |
2944 | return; | |
2945 | } | |
dab291af | 2946 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
2947 | if (jbd2_journal_flush(journal) < 0) |
2948 | goto out; | |
2949 | ||
32c37730 | 2950 | lock_super(sb); |
617ba13b | 2951 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 2952 | sb->s_flags & MS_RDONLY) { |
617ba13b | 2953 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 2954 | sb->s_dirt = 0; |
617ba13b | 2955 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2956 | } |
32c37730 | 2957 | unlock_super(sb); |
7ffe1ea8 HK |
2958 | |
2959 | out: | |
dab291af | 2960 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
2961 | } |
2962 | ||
2963 | /* | |
2964 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2965 | * has recorded an error from a previous lifetime, move that error to the | |
2966 | * main filesystem now. | |
2967 | */ | |
2b2d6d01 TT |
2968 | static void ext4_clear_journal_err(struct super_block *sb, |
2969 | struct ext4_super_block *es) | |
ac27a0ec DK |
2970 | { |
2971 | journal_t *journal; | |
2972 | int j_errno; | |
2973 | const char *errstr; | |
2974 | ||
0390131b FM |
2975 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2976 | ||
617ba13b | 2977 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2978 | |
2979 | /* | |
2980 | * Now check for any error status which may have been recorded in the | |
617ba13b | 2981 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
2982 | */ |
2983 | ||
dab291af | 2984 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
2985 | if (j_errno) { |
2986 | char nbuf[16]; | |
2987 | ||
617ba13b | 2988 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 2989 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 2990 | "from previous mount: %s", errstr); |
46e665e9 | 2991 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
2992 | "filesystem check."); |
2993 | ||
617ba13b MC |
2994 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
2995 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2b2d6d01 | 2996 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2997 | |
dab291af | 2998 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
2999 | } |
3000 | } | |
3001 | ||
3002 | /* | |
3003 | * Force the running and committing transactions to commit, | |
3004 | * and wait on the commit. | |
3005 | */ | |
617ba13b | 3006 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3007 | { |
3008 | journal_t *journal; | |
0390131b | 3009 | int ret = 0; |
ac27a0ec DK |
3010 | |
3011 | if (sb->s_flags & MS_RDONLY) | |
3012 | return 0; | |
3013 | ||
617ba13b | 3014 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
3015 | if (journal) { |
3016 | sb->s_dirt = 0; | |
3017 | ret = ext4_journal_force_commit(journal); | |
3018 | } | |
3019 | ||
ac27a0ec DK |
3020 | return ret; |
3021 | } | |
3022 | ||
3023 | /* | |
617ba13b | 3024 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec | 3025 | * have to propagate any other updates to the superblock on disk at this |
14ce0cb4 TT |
3026 | * point. (We can probably nuke this function altogether, and remove |
3027 | * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) | |
ac27a0ec | 3028 | */ |
2b2d6d01 | 3029 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3030 | { |
0390131b FM |
3031 | if (EXT4_SB(sb)->s_journal) { |
3032 | if (mutex_trylock(&sb->s_lock) != 0) | |
3033 | BUG(); | |
3034 | sb->s_dirt = 0; | |
3035 | } else { | |
3036 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
3037 | } | |
ac27a0ec DK |
3038 | } |
3039 | ||
617ba13b | 3040 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3041 | { |
14ce0cb4 | 3042 | int ret = 0; |
ac27a0ec | 3043 | |
ede86cc4 | 3044 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
ac27a0ec | 3045 | sb->s_dirt = 0; |
0390131b FM |
3046 | if (EXT4_SB(sb)->s_journal) { |
3047 | if (wait) | |
3048 | ret = ext4_force_commit(sb); | |
3049 | else | |
3050 | jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, NULL); | |
3051 | } else { | |
3052 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); | |
3053 | } | |
14ce0cb4 | 3054 | return ret; |
ac27a0ec DK |
3055 | } |
3056 | ||
3057 | /* | |
3058 | * LVM calls this function before a (read-only) snapshot is created. This | |
3059 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3060 | */ | |
617ba13b | 3061 | static void ext4_write_super_lockfs(struct super_block *sb) |
ac27a0ec DK |
3062 | { |
3063 | sb->s_dirt = 0; | |
3064 | ||
3065 | if (!(sb->s_flags & MS_RDONLY)) { | |
617ba13b | 3066 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3067 | |
0390131b FM |
3068 | if (journal) { |
3069 | /* Now we set up the journal barrier. */ | |
3070 | jbd2_journal_lock_updates(journal); | |
7ffe1ea8 | 3071 | |
0390131b FM |
3072 | /* |
3073 | * We don't want to clear needs_recovery flag when we | |
3074 | * failed to flush the journal. | |
3075 | */ | |
3076 | if (jbd2_journal_flush(journal) < 0) | |
3077 | return; | |
3078 | } | |
ac27a0ec DK |
3079 | |
3080 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b MC |
3081 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
3082 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec DK |
3083 | } |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3088 | * flag here, even though the filesystem is not technically dirty yet. | |
3089 | */ | |
617ba13b | 3090 | static void ext4_unlockfs(struct super_block *sb) |
ac27a0ec | 3091 | { |
0390131b | 3092 | if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { |
ac27a0ec DK |
3093 | lock_super(sb); |
3094 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
3095 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
3096 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 3097 | unlock_super(sb); |
dab291af | 3098 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec DK |
3099 | } |
3100 | } | |
3101 | ||
2b2d6d01 | 3102 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3103 | { |
2b2d6d01 | 3104 | struct ext4_super_block *es; |
617ba13b MC |
3105 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3106 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3107 | unsigned long old_sb_flags; |
617ba13b | 3108 | struct ext4_mount_options old_opts; |
8a266467 | 3109 | ext4_group_t g; |
b3881f74 | 3110 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3111 | int err; |
3112 | #ifdef CONFIG_QUOTA | |
3113 | int i; | |
3114 | #endif | |
3115 | ||
3116 | /* Store the original options */ | |
3117 | old_sb_flags = sb->s_flags; | |
3118 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3119 | old_opts.s_resuid = sbi->s_resuid; | |
3120 | old_opts.s_resgid = sbi->s_resgid; | |
3121 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3122 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3123 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3124 | #ifdef CONFIG_QUOTA |
3125 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3126 | for (i = 0; i < MAXQUOTAS; i++) | |
3127 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3128 | #endif | |
b3881f74 TT |
3129 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3130 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3131 | |
3132 | /* | |
3133 | * Allow the "check" option to be passed as a remount option. | |
3134 | */ | |
b3881f74 TT |
3135 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3136 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3137 | err = -EINVAL; |
3138 | goto restore_opts; | |
3139 | } | |
3140 | ||
617ba13b | 3141 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 3142 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3143 | |
3144 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3145 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3146 | |
3147 | es = sbi->s_es; | |
3148 | ||
b3881f74 | 3149 | if (sbi->s_journal) { |
0390131b | 3150 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3151 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3152 | } | |
ac27a0ec DK |
3153 | |
3154 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3155 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3156 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3157 | err = -EROFS; |
3158 | goto restore_opts; | |
3159 | } | |
3160 | ||
3161 | if (*flags & MS_RDONLY) { | |
3162 | /* | |
3163 | * First of all, the unconditional stuff we have to do | |
3164 | * to disable replay of the journal when we next remount | |
3165 | */ | |
3166 | sb->s_flags |= MS_RDONLY; | |
3167 | ||
3168 | /* | |
3169 | * OK, test if we are remounting a valid rw partition | |
3170 | * readonly, and if so set the rdonly flag and then | |
3171 | * mark the partition as valid again. | |
3172 | */ | |
617ba13b MC |
3173 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3174 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3175 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3176 | ||
32c37730 JK |
3177 | /* |
3178 | * We have to unlock super so that we can wait for | |
3179 | * transactions. | |
3180 | */ | |
0390131b FM |
3181 | if (sbi->s_journal) { |
3182 | unlock_super(sb); | |
3183 | ext4_mark_recovery_complete(sb, es); | |
3184 | lock_super(sb); | |
3185 | } | |
ac27a0ec | 3186 | } else { |
3a06d778 | 3187 | int ret; |
617ba13b MC |
3188 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3189 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3190 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec | 3191 | "remount RDWR because of unsupported " |
3a06d778 AK |
3192 | "optional features (%x).\n", sb->s_id, |
3193 | (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & | |
3194 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
3195 | err = -EROFS; |
3196 | goto restore_opts; | |
3197 | } | |
ead6596b | 3198 | |
8a266467 TT |
3199 | /* |
3200 | * Make sure the group descriptor checksums | |
3201 | * are sane. If they aren't, refuse to | |
3202 | * remount r/w. | |
3203 | */ | |
3204 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3205 | struct ext4_group_desc *gdp = | |
3206 | ext4_get_group_desc(sb, g, NULL); | |
3207 | ||
3208 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3209 | printk(KERN_ERR | |
3210 | "EXT4-fs: ext4_remount: " | |
a9df9a49 | 3211 | "Checksum for group %u failed (%u!=%u)\n", |
8a266467 TT |
3212 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3213 | le16_to_cpu(gdp->bg_checksum)); | |
3214 | err = -EINVAL; | |
3215 | goto restore_opts; | |
3216 | } | |
3217 | } | |
3218 | ||
ead6596b ES |
3219 | /* |
3220 | * If we have an unprocessed orphan list hanging | |
3221 | * around from a previously readonly bdev mount, | |
3222 | * require a full umount/remount for now. | |
3223 | */ | |
3224 | if (es->s_last_orphan) { | |
3225 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3226 | "remount RDWR because of unprocessed " | |
3227 | "orphan inode list. Please " | |
3228 | "umount/remount instead.\n", | |
3229 | sb->s_id); | |
3230 | err = -EINVAL; | |
3231 | goto restore_opts; | |
3232 | } | |
3233 | ||
ac27a0ec DK |
3234 | /* |
3235 | * Mounting a RDONLY partition read-write, so reread | |
3236 | * and store the current valid flag. (It may have | |
3237 | * been changed by e2fsck since we originally mounted | |
3238 | * the partition.) | |
3239 | */ | |
0390131b FM |
3240 | if (sbi->s_journal) |
3241 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3242 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3243 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3244 | goto restore_opts; |
2b2d6d01 | 3245 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3246 | sb->s_flags &= ~MS_RDONLY; |
3247 | } | |
3248 | } | |
0390131b FM |
3249 | if (sbi->s_journal == NULL) |
3250 | ext4_commit_super(sb, es, 1); | |
3251 | ||
ac27a0ec DK |
3252 | #ifdef CONFIG_QUOTA |
3253 | /* Release old quota file names */ | |
3254 | for (i = 0; i < MAXQUOTAS; i++) | |
3255 | if (old_opts.s_qf_names[i] && | |
3256 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3257 | kfree(old_opts.s_qf_names[i]); | |
3258 | #endif | |
3259 | return 0; | |
3260 | restore_opts: | |
3261 | sb->s_flags = old_sb_flags; | |
3262 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3263 | sbi->s_resuid = old_opts.s_resuid; | |
3264 | sbi->s_resgid = old_opts.s_resgid; | |
3265 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3266 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3267 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3268 | #ifdef CONFIG_QUOTA |
3269 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3270 | for (i = 0; i < MAXQUOTAS; i++) { | |
3271 | if (sbi->s_qf_names[i] && | |
3272 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3273 | kfree(sbi->s_qf_names[i]); | |
3274 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3275 | } | |
3276 | #endif | |
3277 | return err; | |
3278 | } | |
3279 | ||
2b2d6d01 | 3280 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3281 | { |
3282 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3283 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3284 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3285 | u64 fsid; |
ac27a0ec | 3286 | |
5e70030d BP |
3287 | if (test_opt(sb, MINIX_DF)) { |
3288 | sbi->s_overhead_last = 0; | |
6bc9feff | 3289 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
fd2d4291 | 3290 | ext4_group_t ngroups = sbi->s_groups_count, i; |
5e70030d | 3291 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3292 | smp_rmb(); |
3293 | ||
3294 | /* | |
5e70030d BP |
3295 | * Compute the overhead (FS structures). This is constant |
3296 | * for a given filesystem unless the number of block groups | |
3297 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3298 | */ |
3299 | ||
3300 | /* | |
3301 | * All of the blocks before first_data_block are | |
3302 | * overhead | |
3303 | */ | |
3304 | overhead = le32_to_cpu(es->s_first_data_block); | |
3305 | ||
3306 | /* | |
3307 | * Add the overhead attributed to the superblock and | |
3308 | * block group descriptors. If the sparse superblocks | |
3309 | * feature is turned on, then not all groups have this. | |
3310 | */ | |
3311 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3312 | overhead += ext4_bg_has_super(sb, i) + |
3313 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3314 | cond_resched(); |
3315 | } | |
3316 | ||
3317 | /* | |
3318 | * Every block group has an inode bitmap, a block | |
3319 | * bitmap, and an inode table. | |
3320 | */ | |
5e70030d BP |
3321 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3322 | sbi->s_overhead_last = overhead; | |
3323 | smp_wmb(); | |
6bc9feff | 3324 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3325 | } |
3326 | ||
617ba13b | 3327 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3328 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3329 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3330 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3331 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3332 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3333 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3334 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3335 | buf->f_bavail = 0; |
3336 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3337 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3338 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3339 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3340 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3341 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3342 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3343 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3344 | return 0; |
3345 | } | |
3346 | ||
3347 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3348 | * is locked for write. Otherwise the are possible deadlocks: | |
3349 | * Process 1 Process 2 | |
617ba13b | 3350 | * ext4_create() quota_sync() |
dab291af | 3351 | * jbd2_journal_start() write_dquot() |
ac27a0ec | 3352 | * DQUOT_INIT() down(dqio_mutex) |
dab291af | 3353 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3354 | * |
3355 | */ | |
3356 | ||
3357 | #ifdef CONFIG_QUOTA | |
3358 | ||
3359 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3360 | { | |
3361 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3362 | } | |
3363 | ||
617ba13b | 3364 | static int ext4_dquot_initialize(struct inode *inode, int type) |
ac27a0ec DK |
3365 | { |
3366 | handle_t *handle; | |
3367 | int ret, err; | |
3368 | ||
3369 | /* We may create quota structure so we need to reserve enough blocks */ | |
617ba13b | 3370 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); |
ac27a0ec DK |
3371 | if (IS_ERR(handle)) |
3372 | return PTR_ERR(handle); | |
3373 | ret = dquot_initialize(inode, type); | |
617ba13b | 3374 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3375 | if (!ret) |
3376 | ret = err; | |
3377 | return ret; | |
3378 | } | |
3379 | ||
617ba13b | 3380 | static int ext4_dquot_drop(struct inode *inode) |
ac27a0ec DK |
3381 | { |
3382 | handle_t *handle; | |
3383 | int ret, err; | |
3384 | ||
3385 | /* We may delete quota structure so we need to reserve enough blocks */ | |
617ba13b | 3386 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); |
2887df13 JK |
3387 | if (IS_ERR(handle)) { |
3388 | /* | |
3389 | * We call dquot_drop() anyway to at least release references | |
3390 | * to quota structures so that umount does not hang. | |
3391 | */ | |
3392 | dquot_drop(inode); | |
ac27a0ec | 3393 | return PTR_ERR(handle); |
2887df13 | 3394 | } |
ac27a0ec | 3395 | ret = dquot_drop(inode); |
617ba13b | 3396 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3397 | if (!ret) |
3398 | ret = err; | |
3399 | return ret; | |
3400 | } | |
3401 | ||
617ba13b | 3402 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3403 | { |
3404 | int ret, err; | |
3405 | handle_t *handle; | |
3406 | struct inode *inode; | |
3407 | ||
3408 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3409 | handle = ext4_journal_start(inode, |
3410 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3411 | if (IS_ERR(handle)) |
3412 | return PTR_ERR(handle); | |
3413 | ret = dquot_commit(dquot); | |
617ba13b | 3414 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3415 | if (!ret) |
3416 | ret = err; | |
3417 | return ret; | |
3418 | } | |
3419 | ||
617ba13b | 3420 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3421 | { |
3422 | int ret, err; | |
3423 | handle_t *handle; | |
3424 | ||
617ba13b MC |
3425 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3426 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3427 | if (IS_ERR(handle)) |
3428 | return PTR_ERR(handle); | |
3429 | ret = dquot_acquire(dquot); | |
617ba13b | 3430 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3431 | if (!ret) |
3432 | ret = err; | |
3433 | return ret; | |
3434 | } | |
3435 | ||
617ba13b | 3436 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3437 | { |
3438 | int ret, err; | |
3439 | handle_t *handle; | |
3440 | ||
617ba13b MC |
3441 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3442 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3443 | if (IS_ERR(handle)) { |
3444 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3445 | dquot_release(dquot); | |
ac27a0ec | 3446 | return PTR_ERR(handle); |
9c3013e9 | 3447 | } |
ac27a0ec | 3448 | ret = dquot_release(dquot); |
617ba13b | 3449 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3450 | if (!ret) |
3451 | ret = err; | |
3452 | return ret; | |
3453 | } | |
3454 | ||
617ba13b | 3455 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3456 | { |
2c8be6b2 | 3457 | /* Are we journaling quotas? */ |
617ba13b MC |
3458 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3459 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3460 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3461 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3462 | } else { |
3463 | return dquot_mark_dquot_dirty(dquot); | |
3464 | } | |
3465 | } | |
3466 | ||
617ba13b | 3467 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3468 | { |
3469 | int ret, err; | |
3470 | handle_t *handle; | |
3471 | ||
3472 | /* Data block + inode block */ | |
617ba13b | 3473 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3474 | if (IS_ERR(handle)) |
3475 | return PTR_ERR(handle); | |
3476 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3477 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3478 | if (!ret) |
3479 | ret = err; | |
3480 | return ret; | |
3481 | } | |
3482 | ||
3483 | /* | |
3484 | * Turn on quotas during mount time - we need to find | |
3485 | * the quota file and such... | |
3486 | */ | |
617ba13b | 3487 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3488 | { |
617ba13b MC |
3489 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3490 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3491 | } |
3492 | ||
3493 | /* | |
3494 | * Standard function to be called on quota_on | |
3495 | */ | |
617ba13b | 3496 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3497 | char *name, int remount) |
ac27a0ec DK |
3498 | { |
3499 | int err; | |
8264613d | 3500 | struct path path; |
ac27a0ec DK |
3501 | |
3502 | if (!test_opt(sb, QUOTA)) | |
3503 | return -EINVAL; | |
8264613d | 3504 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3505 | if (remount) |
8264613d | 3506 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3507 | |
8264613d | 3508 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3509 | if (err) |
3510 | return err; | |
0623543b | 3511 | |
ac27a0ec | 3512 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3513 | if (path.mnt->mnt_sb != sb) { |
3514 | path_put(&path); | |
ac27a0ec DK |
3515 | return -EXDEV; |
3516 | } | |
0623543b JK |
3517 | /* Journaling quota? */ |
3518 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3519 | /* Quotafile not in fs root? */ |
8264613d | 3520 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3521 | printk(KERN_WARNING |
3522 | "EXT4-fs: Quota file not on filesystem root. " | |
3523 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3524 | } |
0623543b JK |
3525 | |
3526 | /* | |
3527 | * When we journal data on quota file, we have to flush journal to see | |
3528 | * all updates to the file when we bypass pagecache... | |
3529 | */ | |
0390131b FM |
3530 | if (EXT4_SB(sb)->s_journal && |
3531 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3532 | /* |
3533 | * We don't need to lock updates but journal_flush() could | |
3534 | * otherwise be livelocked... | |
3535 | */ | |
3536 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3537 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3538 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3539 | if (err) { |
8264613d | 3540 | path_put(&path); |
7ffe1ea8 HK |
3541 | return err; |
3542 | } | |
0623543b JK |
3543 | } |
3544 | ||
8264613d AV |
3545 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3546 | path_put(&path); | |
77e69dac | 3547 | return err; |
ac27a0ec DK |
3548 | } |
3549 | ||
3550 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3551 | * acquiring the locks... As quota files are never truncated and quota code | |
3552 | * itself serializes the operations (and noone else should touch the files) | |
3553 | * we don't have to be afraid of races */ | |
617ba13b | 3554 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3555 | size_t len, loff_t off) |
3556 | { | |
3557 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3558 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3559 | int err = 0; |
3560 | int offset = off & (sb->s_blocksize - 1); | |
3561 | int tocopy; | |
3562 | size_t toread; | |
3563 | struct buffer_head *bh; | |
3564 | loff_t i_size = i_size_read(inode); | |
3565 | ||
3566 | if (off > i_size) | |
3567 | return 0; | |
3568 | if (off+len > i_size) | |
3569 | len = i_size-off; | |
3570 | toread = len; | |
3571 | while (toread > 0) { | |
3572 | tocopy = sb->s_blocksize - offset < toread ? | |
3573 | sb->s_blocksize - offset : toread; | |
617ba13b | 3574 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3575 | if (err) |
3576 | return err; | |
3577 | if (!bh) /* A hole? */ | |
3578 | memset(data, 0, tocopy); | |
3579 | else | |
3580 | memcpy(data, bh->b_data+offset, tocopy); | |
3581 | brelse(bh); | |
3582 | offset = 0; | |
3583 | toread -= tocopy; | |
3584 | data += tocopy; | |
3585 | blk++; | |
3586 | } | |
3587 | return len; | |
3588 | } | |
3589 | ||
3590 | /* Write to quotafile (we know the transaction is already started and has | |
3591 | * enough credits) */ | |
617ba13b | 3592 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3593 | const char *data, size_t len, loff_t off) |
3594 | { | |
3595 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3596 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3597 | int err = 0; |
3598 | int offset = off & (sb->s_blocksize - 1); | |
3599 | int tocopy; | |
617ba13b | 3600 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3601 | size_t towrite = len; |
3602 | struct buffer_head *bh; | |
3603 | handle_t *handle = journal_current_handle(); | |
3604 | ||
0390131b | 3605 | if (EXT4_SB(sb)->s_journal && !handle) { |
e5f8eab8 | 3606 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3607 | " cancelled because transaction is not started.\n", |
3608 | (unsigned long long)off, (unsigned long long)len); | |
3609 | return -EIO; | |
3610 | } | |
ac27a0ec DK |
3611 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3612 | while (towrite > 0) { | |
3613 | tocopy = sb->s_blocksize - offset < towrite ? | |
3614 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3615 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3616 | if (!bh) |
3617 | goto out; | |
3618 | if (journal_quota) { | |
617ba13b | 3619 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3620 | if (err) { |
3621 | brelse(bh); | |
3622 | goto out; | |
3623 | } | |
3624 | } | |
3625 | lock_buffer(bh); | |
3626 | memcpy(bh->b_data+offset, data, tocopy); | |
3627 | flush_dcache_page(bh->b_page); | |
3628 | unlock_buffer(bh); | |
3629 | if (journal_quota) | |
0390131b | 3630 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3631 | else { |
3632 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3633 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3634 | mark_buffer_dirty(bh); |
3635 | } | |
3636 | brelse(bh); | |
3637 | if (err) | |
3638 | goto out; | |
3639 | offset = 0; | |
3640 | towrite -= tocopy; | |
3641 | data += tocopy; | |
3642 | blk++; | |
3643 | } | |
3644 | out: | |
4d04e4fb JK |
3645 | if (len == towrite) { |
3646 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3647 | return err; |
4d04e4fb | 3648 | } |
ac27a0ec DK |
3649 | if (inode->i_size < off+len-towrite) { |
3650 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3651 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3652 | } |
ac27a0ec | 3653 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3654 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3655 | mutex_unlock(&inode->i_mutex); |
3656 | return len - towrite; | |
3657 | } | |
3658 | ||
3659 | #endif | |
3660 | ||
617ba13b | 3661 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3662 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3663 | { | |
617ba13b | 3664 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3665 | } |
3666 | ||
5e8814f2 TT |
3667 | #ifdef CONFIG_PROC_FS |
3668 | static int ext4_ui_proc_show(struct seq_file *m, void *v) | |
3669 | { | |
3670 | unsigned int *p = m->private; | |
3671 | ||
3672 | seq_printf(m, "%u\n", *p); | |
3673 | return 0; | |
3674 | } | |
3675 | ||
3676 | static int ext4_ui_proc_open(struct inode *inode, struct file *file) | |
3677 | { | |
3678 | return single_open(file, ext4_ui_proc_show, PDE(inode)->data); | |
3679 | } | |
3680 | ||
3681 | static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, | |
3682 | size_t cnt, loff_t *ppos) | |
3683 | { | |
23475e26 | 3684 | unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; |
5e8814f2 | 3685 | char str[32]; |
5e8814f2 TT |
3686 | |
3687 | if (cnt >= sizeof(str)) | |
3688 | return -EINVAL; | |
3689 | if (copy_from_user(str, buf, cnt)) | |
3690 | return -EFAULT; | |
23475e26 RK |
3691 | |
3692 | *p = simple_strtoul(str, NULL, 0); | |
5e8814f2 TT |
3693 | return cnt; |
3694 | } | |
3695 | ||
3696 | const struct file_operations ext4_ui_proc_fops = { | |
3697 | .owner = THIS_MODULE, | |
3698 | .open = ext4_ui_proc_open, | |
3699 | .read = seq_read, | |
3700 | .llseek = seq_lseek, | |
3701 | .release = single_release, | |
3702 | .write = ext4_ui_proc_write, | |
3703 | }; | |
3704 | #endif | |
3705 | ||
03010a33 TT |
3706 | static struct file_system_type ext4_fs_type = { |
3707 | .owner = THIS_MODULE, | |
3708 | .name = "ext4", | |
3709 | .get_sb = ext4_get_sb, | |
3710 | .kill_sb = kill_block_super, | |
3711 | .fs_flags = FS_REQUIRES_DEV, | |
3712 | }; | |
3713 | ||
3714 | #ifdef CONFIG_EXT4DEV_COMPAT | |
3715 | static int ext4dev_get_sb(struct file_system_type *fs_type, | |
3716 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
3717 | { | |
3718 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3719 | "to mount using ext4\n"); | |
3720 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3721 | "will go away by 2.6.31\n"); | |
3722 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); | |
3723 | } | |
3724 | ||
617ba13b | 3725 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3726 | .owner = THIS_MODULE, |
617ba13b | 3727 | .name = "ext4dev", |
03010a33 | 3728 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3729 | .kill_sb = kill_block_super, |
3730 | .fs_flags = FS_REQUIRES_DEV, | |
3731 | }; | |
03010a33 TT |
3732 | MODULE_ALIAS("ext4dev"); |
3733 | #endif | |
ac27a0ec | 3734 | |
617ba13b | 3735 | static int __init init_ext4_fs(void) |
ac27a0ec | 3736 | { |
c9de560d AT |
3737 | int err; |
3738 | ||
9f6200bb | 3739 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3740 | err = init_ext4_mballoc(); |
ac27a0ec DK |
3741 | if (err) |
3742 | return err; | |
c9de560d AT |
3743 | |
3744 | err = init_ext4_xattr(); | |
3745 | if (err) | |
3746 | goto out2; | |
ac27a0ec DK |
3747 | err = init_inodecache(); |
3748 | if (err) | |
3749 | goto out1; | |
03010a33 | 3750 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3751 | if (err) |
3752 | goto out; | |
03010a33 TT |
3753 | #ifdef CONFIG_EXT4DEV_COMPAT |
3754 | err = register_filesystem(&ext4dev_fs_type); | |
3755 | if (err) { | |
3756 | unregister_filesystem(&ext4_fs_type); | |
3757 | goto out; | |
3758 | } | |
3759 | #endif | |
ac27a0ec DK |
3760 | return 0; |
3761 | out: | |
3762 | destroy_inodecache(); | |
3763 | out1: | |
617ba13b | 3764 | exit_ext4_xattr(); |
c9de560d AT |
3765 | out2: |
3766 | exit_ext4_mballoc(); | |
ac27a0ec DK |
3767 | return err; |
3768 | } | |
3769 | ||
617ba13b | 3770 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3771 | { |
03010a33 TT |
3772 | unregister_filesystem(&ext4_fs_type); |
3773 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 3774 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 3775 | #endif |
ac27a0ec | 3776 | destroy_inodecache(); |
617ba13b | 3777 | exit_ext4_xattr(); |
c9de560d | 3778 | exit_ext4_mballoc(); |
9f6200bb | 3779 | remove_proc_entry("fs/ext4", NULL); |
ac27a0ec DK |
3780 | } |
3781 | ||
3782 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 3783 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 3784 | MODULE_LICENSE("GPL"); |
617ba13b MC |
3785 | module_init(init_ext4_fs) |
3786 | module_exit(exit_ext4_fs) |