Commit | Line | Data |
---|---|---|
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> |
3197ebdb | 38 | #include <linux/ctype.h> |
ede86cc4 | 39 | #include <linux/marker.h> |
1330593e | 40 | #include <linux/log2.h> |
717d50e4 | 41 | #include <linux/crc16.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
3dcf5451 CH |
44 | #include "ext4.h" |
45 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
46 | #include "xattr.h" |
47 | #include "acl.h" | |
48 | #include "namei.h" | |
717d50e4 | 49 | #include "group.h" |
ac27a0ec | 50 | |
9f6200bb | 51 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 52 | static struct kset *ext4_kset; |
9f6200bb | 53 | |
617ba13b | 54 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 55 | unsigned long journal_devnum); |
c4be0c1d | 56 | static int ext4_commit_super(struct super_block *sb, |
2b2d6d01 TT |
57 | struct ext4_super_block *es, int sync); |
58 | static void ext4_mark_recovery_complete(struct super_block *sb, | |
59 | struct ext4_super_block *es); | |
60 | static void ext4_clear_journal_err(struct super_block *sb, | |
61 | struct ext4_super_block *es); | |
617ba13b | 62 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 63 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 64 | char nbuf[16]); |
2b2d6d01 TT |
65 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
66 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 67 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 68 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 69 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 70 | |
bd81d8ee | 71 | |
8fadc143 AR |
72 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
73 | struct ext4_group_desc *bg) | |
bd81d8ee | 74 | { |
3a14589c | 75 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 76 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 77 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
78 | } |
79 | ||
8fadc143 AR |
80 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
81 | struct ext4_group_desc *bg) | |
bd81d8ee | 82 | { |
5272f837 | 83 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 84 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 85 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
86 | } |
87 | ||
8fadc143 AR |
88 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
89 | struct ext4_group_desc *bg) | |
bd81d8ee | 90 | { |
5272f837 | 91 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 92 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 93 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
94 | } |
95 | ||
560671a0 AK |
96 | __u32 ext4_free_blks_count(struct super_block *sb, |
97 | struct ext4_group_desc *bg) | |
98 | { | |
99 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
100 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
101 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); | |
102 | } | |
103 | ||
104 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
105 | struct ext4_group_desc *bg) | |
106 | { | |
107 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
108 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
109 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); | |
110 | } | |
111 | ||
112 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
113 | struct ext4_group_desc *bg) | |
114 | { | |
115 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
116 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
117 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); | |
118 | } | |
119 | ||
120 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
121 | struct ext4_group_desc *bg) | |
122 | { | |
123 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
124 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
125 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); | |
126 | } | |
127 | ||
8fadc143 AR |
128 | void ext4_block_bitmap_set(struct super_block *sb, |
129 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 130 | { |
3a14589c | 131 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
132 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
133 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
134 | } |
135 | ||
8fadc143 AR |
136 | void ext4_inode_bitmap_set(struct super_block *sb, |
137 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 138 | { |
5272f837 | 139 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
140 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
141 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
142 | } |
143 | ||
8fadc143 AR |
144 | void ext4_inode_table_set(struct super_block *sb, |
145 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 146 | { |
5272f837 | 147 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
148 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
149 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
150 | } |
151 | ||
560671a0 AK |
152 | void ext4_free_blks_set(struct super_block *sb, |
153 | struct ext4_group_desc *bg, __u32 count) | |
154 | { | |
155 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
156 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
157 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
158 | } | |
159 | ||
160 | void ext4_free_inodes_set(struct super_block *sb, | |
161 | struct ext4_group_desc *bg, __u32 count) | |
162 | { | |
163 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
164 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
165 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
166 | } | |
167 | ||
168 | void ext4_used_dirs_set(struct super_block *sb, | |
169 | struct ext4_group_desc *bg, __u32 count) | |
170 | { | |
171 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
172 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
173 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
174 | } | |
175 | ||
176 | void ext4_itable_unused_set(struct super_block *sb, | |
177 | struct ext4_group_desc *bg, __u32 count) | |
178 | { | |
179 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
180 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
181 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
182 | } | |
183 | ||
ac27a0ec | 184 | /* |
dab291af | 185 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
186 | * |
187 | * The only special thing we need to do here is to make sure that all | |
188 | * journal_end calls result in the superblock being marked dirty, so | |
189 | * that sync() will call the filesystem's write_super callback if | |
190 | * appropriate. | |
191 | */ | |
617ba13b | 192 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
193 | { |
194 | journal_t *journal; | |
195 | ||
196 | if (sb->s_flags & MS_RDONLY) | |
197 | return ERR_PTR(-EROFS); | |
198 | ||
199 | /* Special case here: if the journal has aborted behind our | |
200 | * backs (eg. EIO in the commit thread), then we still need to | |
201 | * take the FS itself readonly cleanly. */ | |
617ba13b | 202 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
203 | if (journal) { |
204 | if (is_journal_aborted(journal)) { | |
205 | ext4_abort(sb, __func__, | |
206 | "Detected aborted journal"); | |
207 | return ERR_PTR(-EROFS); | |
208 | } | |
209 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 210 | } |
0390131b FM |
211 | /* |
212 | * We're not journaling, return the appropriate indication. | |
213 | */ | |
214 | current->journal_info = EXT4_NOJOURNAL_HANDLE; | |
215 | return current->journal_info; | |
ac27a0ec DK |
216 | } |
217 | ||
218 | /* | |
219 | * The only special thing we need to do here is to make sure that all | |
dab291af | 220 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
221 | * that sync() will call the filesystem's write_super callback if |
222 | * appropriate. | |
223 | */ | |
617ba13b | 224 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
225 | { |
226 | struct super_block *sb; | |
227 | int err; | |
228 | int rc; | |
229 | ||
0390131b FM |
230 | if (!ext4_handle_valid(handle)) { |
231 | /* | |
232 | * Do this here since we don't call jbd2_journal_stop() in | |
233 | * no-journal mode. | |
234 | */ | |
235 | current->journal_info = NULL; | |
236 | return 0; | |
237 | } | |
ac27a0ec DK |
238 | sb = handle->h_transaction->t_journal->j_private; |
239 | err = handle->h_err; | |
dab291af | 240 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
241 | |
242 | if (!err) | |
243 | err = rc; | |
244 | if (err) | |
617ba13b | 245 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
246 | return err; |
247 | } | |
248 | ||
617ba13b | 249 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
250 | struct buffer_head *bh, handle_t *handle, int err) |
251 | { | |
252 | char nbuf[16]; | |
617ba13b | 253 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 254 | |
0390131b FM |
255 | BUG_ON(!ext4_handle_valid(handle)); |
256 | ||
ac27a0ec DK |
257 | if (bh) |
258 | BUFFER_TRACE(bh, "abort"); | |
259 | ||
260 | if (!handle->h_err) | |
261 | handle->h_err = err; | |
262 | ||
263 | if (is_handle_aborted(handle)) | |
264 | return; | |
265 | ||
266 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
267 | caller, errstr, err_fn); | |
268 | ||
dab291af | 269 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
270 | } |
271 | ||
272 | /* Deal with the reporting of failure conditions on a filesystem such as | |
273 | * inconsistencies detected or read IO failures. | |
274 | * | |
275 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 276 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
277 | * write ordering constraints on the superblock which prevent us from |
278 | * writing it out straight away; and given that the journal is about to | |
279 | * be aborted, we can't rely on the current, or future, transactions to | |
280 | * write out the superblock safely. | |
281 | * | |
dab291af | 282 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
283 | * the journal instead. On recovery, the journal will compain about |
284 | * that error until we've noted it down and cleared it. | |
285 | */ | |
286 | ||
617ba13b | 287 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 288 | { |
617ba13b | 289 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 290 | |
617ba13b MC |
291 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
292 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
293 | |
294 | if (sb->s_flags & MS_RDONLY) | |
295 | return; | |
296 | ||
2b2d6d01 | 297 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 298 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 299 | |
617ba13b | 300 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 301 | if (journal) |
dab291af | 302 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 303 | } |
2b2d6d01 TT |
304 | if (test_opt(sb, ERRORS_RO)) { |
305 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
306 | sb->s_flags |= MS_RDONLY; |
307 | } | |
617ba13b | 308 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 309 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 310 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
311 | sb->s_id); |
312 | } | |
313 | ||
2b2d6d01 TT |
314 | void ext4_error(struct super_block *sb, const char *function, |
315 | const char *fmt, ...) | |
ac27a0ec DK |
316 | { |
317 | va_list args; | |
318 | ||
319 | va_start(args, fmt); | |
2b2d6d01 | 320 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
321 | vprintk(fmt, args); |
322 | printk("\n"); | |
323 | va_end(args); | |
324 | ||
617ba13b | 325 | ext4_handle_error(sb); |
ac27a0ec DK |
326 | } |
327 | ||
2b2d6d01 | 328 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
329 | char nbuf[16]) |
330 | { | |
331 | char *errstr = NULL; | |
332 | ||
333 | switch (errno) { | |
334 | case -EIO: | |
335 | errstr = "IO failure"; | |
336 | break; | |
337 | case -ENOMEM: | |
338 | errstr = "Out of memory"; | |
339 | break; | |
340 | case -EROFS: | |
dab291af | 341 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
342 | errstr = "Journal has aborted"; |
343 | else | |
344 | errstr = "Readonly filesystem"; | |
345 | break; | |
346 | default: | |
347 | /* If the caller passed in an extra buffer for unknown | |
348 | * errors, textualise them now. Else we just return | |
349 | * NULL. */ | |
350 | if (nbuf) { | |
351 | /* Check for truncated error codes... */ | |
352 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
353 | errstr = nbuf; | |
354 | } | |
355 | break; | |
356 | } | |
357 | ||
358 | return errstr; | |
359 | } | |
360 | ||
617ba13b | 361 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
362 | * automatically and invokes the appropriate error response. */ |
363 | ||
2b2d6d01 | 364 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
365 | { |
366 | char nbuf[16]; | |
367 | const char *errstr; | |
368 | ||
369 | /* Special case: if the error is EROFS, and we're not already | |
370 | * inside a transaction, then there's really no point in logging | |
371 | * an error. */ | |
372 | if (errno == -EROFS && journal_current_handle() == NULL && | |
373 | (sb->s_flags & MS_RDONLY)) | |
374 | return; | |
375 | ||
617ba13b | 376 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
377 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
378 | sb->s_id, function, errstr); | |
ac27a0ec | 379 | |
617ba13b | 380 | ext4_handle_error(sb); |
ac27a0ec DK |
381 | } |
382 | ||
383 | /* | |
617ba13b | 384 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
385 | * abort function may be used to deal with unrecoverable failures such |
386 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
387 | * | |
388 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
389 | * unless the error response on the fs has been set to panic in which | |
390 | * case we take the easy way out and panic immediately. | |
391 | */ | |
392 | ||
2b2d6d01 TT |
393 | void ext4_abort(struct super_block *sb, const char *function, |
394 | const char *fmt, ...) | |
ac27a0ec DK |
395 | { |
396 | va_list args; | |
397 | ||
2b2d6d01 | 398 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
399 | |
400 | va_start(args, fmt); | |
2b2d6d01 | 401 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
402 | vprintk(fmt, args); |
403 | printk("\n"); | |
404 | va_end(args); | |
405 | ||
406 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 407 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
408 | |
409 | if (sb->s_flags & MS_RDONLY) | |
410 | return; | |
411 | ||
412 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 413 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 414 | sb->s_flags |= MS_RDONLY; |
617ba13b | 415 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
416 | if (EXT4_SB(sb)->s_journal) |
417 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
418 | } |
419 | ||
2b2d6d01 TT |
420 | void ext4_warning(struct super_block *sb, const char *function, |
421 | const char *fmt, ...) | |
ac27a0ec DK |
422 | { |
423 | va_list args; | |
424 | ||
425 | va_start(args, fmt); | |
617ba13b | 426 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
427 | sb->s_id, function); |
428 | vprintk(fmt, args); | |
429 | printk("\n"); | |
430 | va_end(args); | |
431 | } | |
432 | ||
5d1b1b3f AK |
433 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
434 | const char *function, const char *fmt, ...) | |
435 | __releases(bitlock) | |
436 | __acquires(bitlock) | |
437 | { | |
438 | va_list args; | |
439 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
440 | ||
441 | va_start(args, fmt); | |
442 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
443 | vprintk(fmt, args); | |
444 | printk("\n"); | |
445 | va_end(args); | |
446 | ||
447 | if (test_opt(sb, ERRORS_CONT)) { | |
448 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
449 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
450 | ext4_commit_super(sb, es, 0); | |
451 | return; | |
452 | } | |
453 | ext4_unlock_group(sb, grp); | |
454 | ext4_handle_error(sb); | |
455 | /* | |
456 | * We only get here in the ERRORS_RO case; relocking the group | |
457 | * may be dangerous, but nothing bad will happen since the | |
458 | * filesystem will have already been marked read/only and the | |
459 | * journal has been aborted. We return 1 as a hint to callers | |
460 | * who might what to use the return value from | |
461 | * ext4_grp_locked_error() to distinguish beween the | |
462 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
463 | * aggressively from the ext4 function in question, with a | |
464 | * more appropriate error code. | |
465 | */ | |
466 | ext4_lock_group(sb, grp); | |
467 | return; | |
468 | } | |
469 | ||
470 | ||
617ba13b | 471 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 472 | { |
617ba13b | 473 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 474 | |
617ba13b | 475 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
476 | return; |
477 | ||
46e665e9 | 478 | ext4_warning(sb, __func__, |
ac27a0ec DK |
479 | "updating to rev %d because of new feature flag, " |
480 | "running e2fsck is recommended", | |
617ba13b | 481 | EXT4_DYNAMIC_REV); |
ac27a0ec | 482 | |
617ba13b MC |
483 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
484 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
485 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
486 | /* leave es->s_feature_*compat flags alone */ |
487 | /* es->s_uuid will be set by e2fsck if empty */ | |
488 | ||
489 | /* | |
490 | * The rest of the superblock fields should be zero, and if not it | |
491 | * means they are likely already in use, so leave them alone. We | |
492 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
493 | */ | |
494 | } | |
495 | ||
496 | /* | |
497 | * Open the external journal device | |
498 | */ | |
617ba13b | 499 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
500 | { |
501 | struct block_device *bdev; | |
502 | char b[BDEVNAME_SIZE]; | |
503 | ||
504 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
505 | if (IS_ERR(bdev)) | |
506 | goto fail; | |
507 | return bdev; | |
508 | ||
509 | fail: | |
abda1418 | 510 | printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
511 | __bdevname(dev, b), PTR_ERR(bdev)); |
512 | return NULL; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Release the journal device | |
517 | */ | |
617ba13b | 518 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
519 | { |
520 | bd_release(bdev); | |
9a1c3542 | 521 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
522 | } |
523 | ||
617ba13b | 524 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
525 | { |
526 | struct block_device *bdev; | |
527 | int ret = -ENODEV; | |
528 | ||
529 | bdev = sbi->journal_bdev; | |
530 | if (bdev) { | |
617ba13b | 531 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
532 | sbi->journal_bdev = NULL; |
533 | } | |
534 | return ret; | |
535 | } | |
536 | ||
537 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
538 | { | |
617ba13b | 539 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
540 | } |
541 | ||
617ba13b | 542 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
543 | { |
544 | struct list_head *l; | |
545 | ||
546 | printk(KERN_ERR "sb orphan head is %d\n", | |
547 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
548 | ||
549 | printk(KERN_ERR "sb_info orphan list:\n"); | |
550 | list_for_each(l, &sbi->s_orphan) { | |
551 | struct inode *inode = orphan_list_entry(l); | |
552 | printk(KERN_ERR " " | |
553 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
554 | inode->i_sb->s_id, inode->i_ino, inode, | |
555 | inode->i_mode, inode->i_nlink, | |
556 | NEXT_ORPHAN(inode)); | |
557 | } | |
558 | } | |
559 | ||
2b2d6d01 | 560 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 561 | { |
617ba13b MC |
562 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
563 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 564 | int i, err; |
ac27a0ec | 565 | |
c9de560d | 566 | ext4_mb_release(sb); |
a86c6181 | 567 | ext4_ext_release(sb); |
617ba13b | 568 | ext4_xattr_put_super(sb); |
0390131b FM |
569 | if (sbi->s_journal) { |
570 | err = jbd2_journal_destroy(sbi->s_journal); | |
571 | sbi->s_journal = NULL; | |
572 | if (err < 0) | |
573 | ext4_abort(sb, __func__, | |
574 | "Couldn't clean up the journal"); | |
575 | } | |
ac27a0ec | 576 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 577 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 578 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
617ba13b | 579 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 580 | } |
240799cd | 581 | if (sbi->s_proc) { |
9f6200bb | 582 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 583 | } |
3197ebdb | 584 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
585 | |
586 | for (i = 0; i < sbi->s_gdb_count; i++) | |
587 | brelse(sbi->s_group_desc[i]); | |
588 | kfree(sbi->s_group_desc); | |
772cb7c8 | 589 | kfree(sbi->s_flex_groups); |
ac27a0ec DK |
590 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
591 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
592 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 593 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
594 | brelse(sbi->s_sbh); |
595 | #ifdef CONFIG_QUOTA | |
596 | for (i = 0; i < MAXQUOTAS; i++) | |
597 | kfree(sbi->s_qf_names[i]); | |
598 | #endif | |
599 | ||
600 | /* Debugging code just in case the in-memory inode orphan list | |
601 | * isn't empty. The on-disk one can be non-empty if we've | |
602 | * detected an error and taken the fs readonly, but the | |
603 | * in-memory list had better be clean by this point. */ | |
604 | if (!list_empty(&sbi->s_orphan)) | |
605 | dump_orphan_list(sb, sbi); | |
606 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
607 | ||
f98393a6 | 608 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
609 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
610 | /* | |
611 | * Invalidate the journal device's buffers. We don't want them | |
612 | * floating about in memory - the physical journal device may | |
613 | * hotswapped, and it breaks the `ro-after' testing code. | |
614 | */ | |
615 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 616 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 617 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
618 | } |
619 | sb->s_fs_info = NULL; | |
3197ebdb TT |
620 | /* |
621 | * Now that we are completely done shutting down the | |
622 | * superblock, we need to actually destroy the kobject. | |
623 | */ | |
624 | unlock_kernel(); | |
625 | unlock_super(sb); | |
626 | kobject_put(&sbi->s_kobj); | |
627 | wait_for_completion(&sbi->s_kobj_unregister); | |
628 | lock_super(sb); | |
629 | lock_kernel(); | |
705895b6 | 630 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
631 | kfree(sbi); |
632 | return; | |
633 | } | |
634 | ||
e18b890b | 635 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
636 | |
637 | /* | |
638 | * Called inside transaction, so use GFP_NOFS | |
639 | */ | |
617ba13b | 640 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 641 | { |
617ba13b | 642 | struct ext4_inode_info *ei; |
ac27a0ec | 643 | |
e6b4f8da | 644 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
645 | if (!ei) |
646 | return NULL; | |
03010a33 | 647 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
648 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
649 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 650 | #endif |
ac27a0ec | 651 | ei->vfs_inode.i_version = 1; |
91246c00 | 652 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 653 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
654 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
655 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
656 | /* |
657 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
658 | * therefore it can be null here. Don't check it, just initialize | |
659 | * jinode. | |
660 | */ | |
678aaf48 | 661 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
662 | ei->i_reserved_data_blocks = 0; |
663 | ei->i_reserved_meta_blocks = 0; | |
664 | ei->i_allocated_meta_blocks = 0; | |
665 | ei->i_delalloc_reserved_flag = 0; | |
666 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
ac27a0ec DK |
667 | return &ei->vfs_inode; |
668 | } | |
669 | ||
617ba13b | 670 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 671 | { |
9f7dd93d VA |
672 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
673 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
674 | EXT4_I(inode)); | |
675 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
676 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
677 | true); | |
678 | dump_stack(); | |
679 | } | |
617ba13b | 680 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
681 | } |
682 | ||
51cc5068 | 683 | static void init_once(void *foo) |
ac27a0ec | 684 | { |
617ba13b | 685 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 686 | |
a35afb83 | 687 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 688 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 689 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 690 | #endif |
0e855ac8 | 691 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 692 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
693 | } |
694 | ||
695 | static int init_inodecache(void) | |
696 | { | |
617ba13b MC |
697 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
698 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
699 | 0, (SLAB_RECLAIM_ACCOUNT| |
700 | SLAB_MEM_SPREAD), | |
20c2df83 | 701 | init_once); |
617ba13b | 702 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
703 | return -ENOMEM; |
704 | return 0; | |
705 | } | |
706 | ||
707 | static void destroy_inodecache(void) | |
708 | { | |
617ba13b | 709 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
710 | } |
711 | ||
617ba13b | 712 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 713 | { |
03010a33 | 714 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
715 | if (EXT4_I(inode)->i_acl && |
716 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
717 | posix_acl_release(EXT4_I(inode)->i_acl); | |
718 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
719 | } | |
720 | if (EXT4_I(inode)->i_default_acl && | |
721 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
722 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
723 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
724 | } |
725 | #endif | |
c2ea3fde | 726 | ext4_discard_preallocations(inode); |
0390131b FM |
727 | if (EXT4_JOURNAL(inode)) |
728 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 729 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
730 | } |
731 | ||
2b2d6d01 TT |
732 | static inline void ext4_show_quota_options(struct seq_file *seq, |
733 | struct super_block *sb) | |
ac27a0ec DK |
734 | { |
735 | #if defined(CONFIG_QUOTA) | |
617ba13b | 736 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
737 | |
738 | if (sbi->s_jquota_fmt) | |
739 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 740 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
741 | |
742 | if (sbi->s_qf_names[USRQUOTA]) | |
743 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
744 | ||
745 | if (sbi->s_qf_names[GRPQUOTA]) | |
746 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
747 | ||
617ba13b | 748 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
749 | seq_puts(seq, ",usrquota"); |
750 | ||
617ba13b | 751 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
752 | seq_puts(seq, ",grpquota"); |
753 | #endif | |
754 | } | |
755 | ||
d9c9bef1 MS |
756 | /* |
757 | * Show an option if | |
758 | * - it's set to a non-default value OR | |
759 | * - if the per-sb default is different from the global default | |
760 | */ | |
617ba13b | 761 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 762 | { |
aa22df2c AK |
763 | int def_errors; |
764 | unsigned long def_mount_opts; | |
ac27a0ec | 765 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
766 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
767 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
768 | |
769 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 770 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
771 | |
772 | if (sbi->s_sb_block != 1) | |
773 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
774 | if (test_opt(sb, MINIX_DF)) | |
775 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 776 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
777 | seq_puts(seq, ",grpid"); |
778 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
779 | seq_puts(seq, ",nogrpid"); | |
780 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
781 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
782 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
783 | } | |
784 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
785 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
786 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
787 | } | |
bb4f397a | 788 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 789 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
790 | def_errors == EXT4_ERRORS_CONTINUE) { |
791 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
792 | } |
793 | } | |
aa22df2c | 794 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 795 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 796 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 797 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 798 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 799 | seq_puts(seq, ",nouid32"); |
aa22df2c | 800 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
801 | seq_puts(seq, ",debug"); |
802 | if (test_opt(sb, OLDALLOC)) | |
803 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 804 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
805 | if (test_opt(sb, XATTR_USER) && |
806 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
807 | seq_puts(seq, ",user_xattr"); |
808 | if (!test_opt(sb, XATTR_USER) && | |
809 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
810 | seq_puts(seq, ",nouser_xattr"); | |
811 | } | |
812 | #endif | |
03010a33 | 813 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 814 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
815 | seq_puts(seq, ",acl"); |
816 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
817 | seq_puts(seq, ",noacl"); | |
818 | #endif | |
819 | if (!test_opt(sb, RESERVATION)) | |
820 | seq_puts(seq, ",noreservation"); | |
30773840 | 821 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
822 | seq_printf(seq, ",commit=%u", |
823 | (unsigned) (sbi->s_commit_interval / HZ)); | |
824 | } | |
30773840 TT |
825 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
826 | seq_printf(seq, ",min_batch_time=%u", | |
827 | (unsigned) sbi->s_min_batch_time); | |
828 | } | |
829 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
830 | seq_printf(seq, ",max_batch_time=%u", | |
831 | (unsigned) sbi->s_min_batch_time); | |
832 | } | |
833 | ||
571640ca ES |
834 | /* |
835 | * We're changing the default of barrier mount option, so | |
836 | * let's always display its mount state so it's clear what its | |
837 | * status is. | |
838 | */ | |
839 | seq_puts(seq, ",barrier="); | |
840 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
841 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
842 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
843 | if (test_opt(sb, NOBH)) |
844 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
845 | if (test_opt(sb, I_VERSION)) |
846 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
847 | if (!test_opt(sb, DELALLOC)) |
848 | seq_puts(seq, ",nodelalloc"); | |
849 | ||
ac27a0ec | 850 | |
cb45bbe4 MS |
851 | if (sbi->s_stripe) |
852 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
853 | /* |
854 | * journal mode get enabled in different ways | |
855 | * So just print the value even if we didn't specify it | |
856 | */ | |
617ba13b | 857 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 858 | seq_puts(seq, ",data=journal"); |
617ba13b | 859 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 860 | seq_puts(seq, ",data=ordered"); |
617ba13b | 861 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
862 | seq_puts(seq, ",data=writeback"); |
863 | ||
240799cd TT |
864 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
865 | seq_printf(seq, ",inode_readahead_blks=%u", | |
866 | sbi->s_inode_readahead_blks); | |
867 | ||
5bf5683a HK |
868 | if (test_opt(sb, DATA_ERR_ABORT)) |
869 | seq_puts(seq, ",data_err=abort"); | |
870 | ||
617ba13b | 871 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
872 | return 0; |
873 | } | |
874 | ||
875 | ||
1b961ac0 CH |
876 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
877 | u64 ino, u32 generation) | |
ac27a0ec | 878 | { |
ac27a0ec | 879 | struct inode *inode; |
ac27a0ec | 880 | |
617ba13b | 881 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 882 | return ERR_PTR(-ESTALE); |
617ba13b | 883 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
884 | return ERR_PTR(-ESTALE); |
885 | ||
886 | /* iget isn't really right if the inode is currently unallocated!! | |
887 | * | |
617ba13b | 888 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
889 | * deleted, so we should be safe. |
890 | * | |
891 | * Currently we don't know the generation for parent directory, so | |
892 | * a generation of 0 means "accept any" | |
893 | */ | |
1d1fe1ee DH |
894 | inode = ext4_iget(sb, ino); |
895 | if (IS_ERR(inode)) | |
896 | return ERR_CAST(inode); | |
897 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
898 | iput(inode); |
899 | return ERR_PTR(-ESTALE); | |
900 | } | |
1b961ac0 CH |
901 | |
902 | return inode; | |
903 | } | |
904 | ||
905 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
906 | int fh_len, int fh_type) | |
907 | { | |
908 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
909 | ext4_nfs_get_inode); | |
910 | } | |
911 | ||
912 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
913 | int fh_len, int fh_type) | |
914 | { | |
915 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
916 | ext4_nfs_get_inode); | |
ac27a0ec DK |
917 | } |
918 | ||
c39a7f84 TO |
919 | /* |
920 | * Try to release metadata pages (indirect blocks, directories) which are | |
921 | * mapped via the block device. Since these pages could have journal heads | |
922 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
923 | * jbd2 layer's try_to_free_buffers() function to release them. | |
924 | */ | |
925 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) | |
926 | { | |
927 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
928 | ||
929 | WARN_ON(PageChecked(page)); | |
930 | if (!page_has_buffers(page)) | |
931 | return 0; | |
932 | if (journal) | |
933 | return jbd2_journal_try_to_free_buffers(journal, page, | |
934 | wait & ~__GFP_WAIT); | |
935 | return try_to_free_buffers(page); | |
936 | } | |
937 | ||
ac27a0ec | 938 | #ifdef CONFIG_QUOTA |
af5bc92d | 939 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 940 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 941 | |
617ba13b MC |
942 | static int ext4_write_dquot(struct dquot *dquot); |
943 | static int ext4_acquire_dquot(struct dquot *dquot); | |
944 | static int ext4_release_dquot(struct dquot *dquot); | |
945 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
946 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
947 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
948 | char *path, int remount); | |
617ba13b MC |
949 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
950 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 951 | size_t len, loff_t off); |
617ba13b | 952 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
953 | const char *data, size_t len, loff_t off); |
954 | ||
617ba13b | 955 | static struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
956 | .initialize = dquot_initialize, |
957 | .drop = dquot_drop, | |
ac27a0ec | 958 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
959 | .reserve_space = dquot_reserve_space, |
960 | .claim_space = dquot_claim_space, | |
961 | .release_rsv = dquot_release_reserved_space, | |
962 | .get_reserved_space = ext4_get_reserved_space, | |
ac27a0ec DK |
963 | .alloc_inode = dquot_alloc_inode, |
964 | .free_space = dquot_free_space, | |
965 | .free_inode = dquot_free_inode, | |
966 | .transfer = dquot_transfer, | |
617ba13b MC |
967 | .write_dquot = ext4_write_dquot, |
968 | .acquire_dquot = ext4_acquire_dquot, | |
969 | .release_dquot = ext4_release_dquot, | |
970 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
971 | .write_info = ext4_write_info, |
972 | .alloc_dquot = dquot_alloc, | |
973 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
974 | }; |
975 | ||
617ba13b MC |
976 | static struct quotactl_ops ext4_qctl_operations = { |
977 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
978 | .quota_off = vfs_quota_off, |
979 | .quota_sync = vfs_quota_sync, | |
980 | .get_info = vfs_get_dqinfo, | |
981 | .set_info = vfs_set_dqinfo, | |
982 | .get_dqblk = vfs_get_dqblk, | |
983 | .set_dqblk = vfs_set_dqblk | |
984 | }; | |
985 | #endif | |
986 | ||
ee9b6d61 | 987 | static const struct super_operations ext4_sops = { |
617ba13b MC |
988 | .alloc_inode = ext4_alloc_inode, |
989 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
990 | .write_inode = ext4_write_inode, |
991 | .dirty_inode = ext4_dirty_inode, | |
992 | .delete_inode = ext4_delete_inode, | |
993 | .put_super = ext4_put_super, | |
994 | .write_super = ext4_write_super, | |
995 | .sync_fs = ext4_sync_fs, | |
c4be0c1d TS |
996 | .freeze_fs = ext4_freeze, |
997 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
998 | .statfs = ext4_statfs, |
999 | .remount_fs = ext4_remount, | |
1000 | .clear_inode = ext4_clear_inode, | |
1001 | .show_options = ext4_show_options, | |
ac27a0ec | 1002 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1003 | .quota_read = ext4_quota_read, |
1004 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1005 | #endif |
c39a7f84 | 1006 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1007 | }; |
1008 | ||
39655164 | 1009 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1010 | .fh_to_dentry = ext4_fh_to_dentry, |
1011 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1012 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1013 | }; |
1014 | ||
1015 | enum { | |
1016 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1017 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1018 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec DK |
1019 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
1020 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, | |
30773840 | 1021 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1022 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1023 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1024 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
5bf5683a | 1025 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec DK |
1026 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1027 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
1028 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, | |
83982b6f | 1029 | Opt_grpquota, Opt_i_version, |
01436ef2 | 1030 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
b3881f74 | 1031 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1032 | }; |
1033 | ||
a447c093 | 1034 | static const match_table_t tokens = { |
ac27a0ec DK |
1035 | {Opt_bsd_df, "bsddf"}, |
1036 | {Opt_minix_df, "minixdf"}, | |
1037 | {Opt_grpid, "grpid"}, | |
1038 | {Opt_grpid, "bsdgroups"}, | |
1039 | {Opt_nogrpid, "nogrpid"}, | |
1040 | {Opt_nogrpid, "sysvgroups"}, | |
1041 | {Opt_resgid, "resgid=%u"}, | |
1042 | {Opt_resuid, "resuid=%u"}, | |
1043 | {Opt_sb, "sb=%u"}, | |
1044 | {Opt_err_cont, "errors=continue"}, | |
1045 | {Opt_err_panic, "errors=panic"}, | |
1046 | {Opt_err_ro, "errors=remount-ro"}, | |
1047 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1048 | {Opt_debug, "debug"}, |
1049 | {Opt_oldalloc, "oldalloc"}, | |
1050 | {Opt_orlov, "orlov"}, | |
1051 | {Opt_user_xattr, "user_xattr"}, | |
1052 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1053 | {Opt_acl, "acl"}, | |
1054 | {Opt_noacl, "noacl"}, | |
1055 | {Opt_reservation, "reservation"}, | |
1056 | {Opt_noreservation, "noreservation"}, | |
1057 | {Opt_noload, "noload"}, | |
1058 | {Opt_nobh, "nobh"}, | |
1059 | {Opt_bh, "bh"}, | |
1060 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1061 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1062 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1063 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1064 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1065 | {Opt_journal_checksum, "journal_checksum"}, |
1066 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1067 | {Opt_abort, "abort"}, |
1068 | {Opt_data_journal, "data=journal"}, | |
1069 | {Opt_data_ordered, "data=ordered"}, | |
1070 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1071 | {Opt_data_err_abort, "data_err=abort"}, |
1072 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1073 | {Opt_offusrjquota, "usrjquota="}, |
1074 | {Opt_usrjquota, "usrjquota=%s"}, | |
1075 | {Opt_offgrpjquota, "grpjquota="}, | |
1076 | {Opt_grpjquota, "grpjquota=%s"}, | |
1077 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1078 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1079 | {Opt_grpquota, "grpquota"}, | |
1080 | {Opt_noquota, "noquota"}, | |
1081 | {Opt_quota, "quota"}, | |
1082 | {Opt_usrquota, "usrquota"}, | |
1083 | {Opt_barrier, "barrier=%u"}, | |
25ec56b5 | 1084 | {Opt_i_version, "i_version"}, |
c9de560d | 1085 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1086 | {Opt_resize, "resize"}, |
64769240 | 1087 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1088 | {Opt_nodelalloc, "nodelalloc"}, |
240799cd | 1089 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1090 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
f3f12faa | 1091 | {Opt_err, NULL}, |
ac27a0ec DK |
1092 | }; |
1093 | ||
617ba13b | 1094 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1095 | { |
617ba13b | 1096 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1097 | char *options = (char *) *data; |
1098 | ||
1099 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1100 | return 1; /* Default location */ | |
1101 | options += 3; | |
617ba13b | 1102 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1103 | sb_block = simple_strtoul(options, &options, 0); |
1104 | if (*options && *options != ',') { | |
4776004f | 1105 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1106 | (char *) *data); |
1107 | return 1; | |
1108 | } | |
1109 | if (*options == ',') | |
1110 | options++; | |
1111 | *data = (void *) options; | |
1112 | return sb_block; | |
1113 | } | |
1114 | ||
b3881f74 TT |
1115 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1116 | ||
2b2d6d01 | 1117 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1118 | unsigned long *journal_devnum, |
b3881f74 | 1119 | unsigned int *journal_ioprio, |
2b2d6d01 | 1120 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1121 | { |
617ba13b | 1122 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1123 | char *p; |
ac27a0ec DK |
1124 | substring_t args[MAX_OPT_ARGS]; |
1125 | int data_opt = 0; | |
1126 | int option; | |
1127 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1128 | int qtype, qfmt; |
ac27a0ec DK |
1129 | char *qname; |
1130 | #endif | |
1131 | ||
1132 | if (!options) | |
1133 | return 1; | |
1134 | ||
2b2d6d01 | 1135 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1136 | int token; |
1137 | if (!*p) | |
1138 | continue; | |
1139 | ||
1140 | token = match_token(p, tokens, args); | |
1141 | switch (token) { | |
1142 | case Opt_bsd_df: | |
2b2d6d01 | 1143 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1144 | break; |
1145 | case Opt_minix_df: | |
2b2d6d01 | 1146 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1147 | break; |
1148 | case Opt_grpid: | |
2b2d6d01 | 1149 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1150 | break; |
1151 | case Opt_nogrpid: | |
2b2d6d01 | 1152 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1153 | break; |
1154 | case Opt_resuid: | |
1155 | if (match_int(&args[0], &option)) | |
1156 | return 0; | |
1157 | sbi->s_resuid = option; | |
1158 | break; | |
1159 | case Opt_resgid: | |
1160 | if (match_int(&args[0], &option)) | |
1161 | return 0; | |
1162 | sbi->s_resgid = option; | |
1163 | break; | |
1164 | case Opt_sb: | |
1165 | /* handled by get_sb_block() instead of here */ | |
1166 | /* *sb_block = match_int(&args[0]); */ | |
1167 | break; | |
1168 | case Opt_err_panic: | |
2b2d6d01 TT |
1169 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1170 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1171 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1172 | break; |
1173 | case Opt_err_ro: | |
2b2d6d01 TT |
1174 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1175 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1176 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1177 | break; |
1178 | case Opt_err_cont: | |
2b2d6d01 TT |
1179 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1180 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1181 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1182 | break; |
1183 | case Opt_nouid32: | |
2b2d6d01 | 1184 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1185 | break; |
ac27a0ec | 1186 | case Opt_debug: |
2b2d6d01 | 1187 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1188 | break; |
1189 | case Opt_oldalloc: | |
2b2d6d01 | 1190 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1191 | break; |
1192 | case Opt_orlov: | |
2b2d6d01 | 1193 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1194 | break; |
03010a33 | 1195 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1196 | case Opt_user_xattr: |
2b2d6d01 | 1197 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1198 | break; |
1199 | case Opt_nouser_xattr: | |
2b2d6d01 | 1200 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1201 | break; |
1202 | #else | |
1203 | case Opt_user_xattr: | |
1204 | case Opt_nouser_xattr: | |
4776004f TT |
1205 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1206 | "not supported\n"); | |
ac27a0ec DK |
1207 | break; |
1208 | #endif | |
03010a33 | 1209 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1210 | case Opt_acl: |
1211 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1212 | break; | |
1213 | case Opt_noacl: | |
1214 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1215 | break; | |
1216 | #else | |
1217 | case Opt_acl: | |
1218 | case Opt_noacl: | |
4776004f TT |
1219 | printk(KERN_ERR "EXT4 (no)acl options " |
1220 | "not supported\n"); | |
ac27a0ec DK |
1221 | break; |
1222 | #endif | |
1223 | case Opt_reservation: | |
1224 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1225 | break; | |
1226 | case Opt_noreservation: | |
1227 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1228 | break; | |
1229 | case Opt_journal_update: | |
1230 | /* @@@ FIXME */ | |
1231 | /* Eventually we will want to be able to create | |
1232 | a journal file here. For now, only allow the | |
1233 | user to specify an existing inode to be the | |
1234 | journal file. */ | |
1235 | if (is_remount) { | |
617ba13b | 1236 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1237 | "journal on remount\n"); |
1238 | return 0; | |
1239 | } | |
2b2d6d01 | 1240 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1241 | break; |
ac27a0ec DK |
1242 | case Opt_journal_dev: |
1243 | if (is_remount) { | |
617ba13b | 1244 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1245 | "journal on remount\n"); |
1246 | return 0; | |
1247 | } | |
1248 | if (match_int(&args[0], &option)) | |
1249 | return 0; | |
1250 | *journal_devnum = option; | |
1251 | break; | |
818d276c GS |
1252 | case Opt_journal_checksum: |
1253 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1254 | break; | |
1255 | case Opt_journal_async_commit: | |
1256 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1257 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1258 | break; | |
ac27a0ec | 1259 | case Opt_noload: |
2b2d6d01 | 1260 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1261 | break; |
1262 | case Opt_commit: | |
1263 | if (match_int(&args[0], &option)) | |
1264 | return 0; | |
1265 | if (option < 0) | |
1266 | return 0; | |
1267 | if (option == 0) | |
cd02ff0b | 1268 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1269 | sbi->s_commit_interval = HZ * option; |
1270 | break; | |
30773840 TT |
1271 | case Opt_max_batch_time: |
1272 | if (match_int(&args[0], &option)) | |
1273 | return 0; | |
1274 | if (option < 0) | |
1275 | return 0; | |
1276 | if (option == 0) | |
1277 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1278 | sbi->s_max_batch_time = option; | |
1279 | break; | |
1280 | case Opt_min_batch_time: | |
1281 | if (match_int(&args[0], &option)) | |
1282 | return 0; | |
1283 | if (option < 0) | |
1284 | return 0; | |
1285 | sbi->s_min_batch_time = option; | |
1286 | break; | |
ac27a0ec | 1287 | case Opt_data_journal: |
617ba13b | 1288 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1289 | goto datacheck; |
1290 | case Opt_data_ordered: | |
617ba13b | 1291 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1292 | goto datacheck; |
1293 | case Opt_data_writeback: | |
617ba13b | 1294 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1295 | datacheck: |
1296 | if (is_remount) { | |
617ba13b | 1297 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1298 | != data_opt) { |
1299 | printk(KERN_ERR | |
617ba13b | 1300 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1301 | "mode on remount\n"); |
1302 | return 0; | |
1303 | } | |
1304 | } else { | |
617ba13b | 1305 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1306 | sbi->s_mount_opt |= data_opt; |
1307 | } | |
1308 | break; | |
5bf5683a HK |
1309 | case Opt_data_err_abort: |
1310 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1311 | break; | |
1312 | case Opt_data_err_ignore: | |
1313 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1314 | break; | |
ac27a0ec DK |
1315 | #ifdef CONFIG_QUOTA |
1316 | case Opt_usrjquota: | |
1317 | qtype = USRQUOTA; | |
1318 | goto set_qf_name; | |
1319 | case Opt_grpjquota: | |
1320 | qtype = GRPQUOTA; | |
1321 | set_qf_name: | |
17bd13b3 | 1322 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1323 | !sbi->s_qf_names[qtype]) { |
ac27a0ec | 1324 | printk(KERN_ERR |
4776004f TT |
1325 | "EXT4-fs: Cannot change journaled " |
1326 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1327 | return 0; |
1328 | } | |
1329 | qname = match_strdup(&args[0]); | |
1330 | if (!qname) { | |
1331 | printk(KERN_ERR | |
617ba13b | 1332 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1333 | "storing quotafile name.\n"); |
1334 | return 0; | |
1335 | } | |
1336 | if (sbi->s_qf_names[qtype] && | |
1337 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1338 | printk(KERN_ERR | |
617ba13b | 1339 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1340 | "specified.\n", QTYPE2NAME(qtype)); |
1341 | kfree(qname); | |
1342 | return 0; | |
1343 | } | |
1344 | sbi->s_qf_names[qtype] = qname; | |
1345 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1346 | printk(KERN_ERR | |
617ba13b | 1347 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1348 | "filesystem root.\n"); |
1349 | kfree(sbi->s_qf_names[qtype]); | |
1350 | sbi->s_qf_names[qtype] = NULL; | |
1351 | return 0; | |
1352 | } | |
1353 | set_opt(sbi->s_mount_opt, QUOTA); | |
1354 | break; | |
1355 | case Opt_offusrjquota: | |
1356 | qtype = USRQUOTA; | |
1357 | goto clear_qf_name; | |
1358 | case Opt_offgrpjquota: | |
1359 | qtype = GRPQUOTA; | |
1360 | clear_qf_name: | |
17bd13b3 | 1361 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1362 | sbi->s_qf_names[qtype]) { |
617ba13b | 1363 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1364 | "journaled quota options when " |
ac27a0ec DK |
1365 | "quota turned on.\n"); |
1366 | return 0; | |
1367 | } | |
1368 | /* | |
1369 | * The space will be released later when all options | |
1370 | * are confirmed to be correct | |
1371 | */ | |
1372 | sbi->s_qf_names[qtype] = NULL; | |
1373 | break; | |
1374 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1375 | qfmt = QFMT_VFS_OLD; |
1376 | goto set_qf_format; | |
ac27a0ec | 1377 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1378 | qfmt = QFMT_VFS_V0; |
1379 | set_qf_format: | |
17bd13b3 | 1380 | if (sb_any_quota_loaded(sb) && |
dfc5d03f JK |
1381 | sbi->s_jquota_fmt != qfmt) { |
1382 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1383 | "journaled quota options when " | |
1384 | "quota turned on.\n"); | |
1385 | return 0; | |
1386 | } | |
1387 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1388 | break; |
1389 | case Opt_quota: | |
1390 | case Opt_usrquota: | |
1391 | set_opt(sbi->s_mount_opt, QUOTA); | |
1392 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1393 | break; | |
1394 | case Opt_grpquota: | |
1395 | set_opt(sbi->s_mount_opt, QUOTA); | |
1396 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1397 | break; | |
1398 | case Opt_noquota: | |
17bd13b3 | 1399 | if (sb_any_quota_loaded(sb)) { |
617ba13b | 1400 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1401 | "options when quota turned on.\n"); |
1402 | return 0; | |
1403 | } | |
1404 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1405 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1406 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1407 | break; | |
1408 | #else | |
1409 | case Opt_quota: | |
1410 | case Opt_usrquota: | |
1411 | case Opt_grpquota: | |
cd59e7b9 JK |
1412 | printk(KERN_ERR |
1413 | "EXT4-fs: quota options not supported.\n"); | |
1414 | break; | |
ac27a0ec DK |
1415 | case Opt_usrjquota: |
1416 | case Opt_grpjquota: | |
1417 | case Opt_offusrjquota: | |
1418 | case Opt_offgrpjquota: | |
1419 | case Opt_jqfmt_vfsold: | |
1420 | case Opt_jqfmt_vfsv0: | |
1421 | printk(KERN_ERR | |
cd59e7b9 | 1422 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1423 | "supported.\n"); |
1424 | break; | |
1425 | case Opt_noquota: | |
1426 | break; | |
1427 | #endif | |
1428 | case Opt_abort: | |
1429 | set_opt(sbi->s_mount_opt, ABORT); | |
1430 | break; | |
1431 | case Opt_barrier: | |
1432 | if (match_int(&args[0], &option)) | |
1433 | return 0; | |
1434 | if (option) | |
1435 | set_opt(sbi->s_mount_opt, BARRIER); | |
1436 | else | |
1437 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1438 | break; | |
1439 | case Opt_ignore: | |
1440 | break; | |
1441 | case Opt_resize: | |
1442 | if (!is_remount) { | |
617ba13b | 1443 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1444 | "for remount\n"); |
1445 | return 0; | |
1446 | } | |
1447 | if (match_int(&args[0], &option) != 0) | |
1448 | return 0; | |
1449 | *n_blocks_count = option; | |
1450 | break; | |
1451 | case Opt_nobh: | |
1452 | set_opt(sbi->s_mount_opt, NOBH); | |
1453 | break; | |
1454 | case Opt_bh: | |
1455 | clear_opt(sbi->s_mount_opt, NOBH); | |
1456 | break; | |
25ec56b5 JNC |
1457 | case Opt_i_version: |
1458 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1459 | sb->s_flags |= MS_I_VERSION; | |
1460 | break; | |
dd919b98 AK |
1461 | case Opt_nodelalloc: |
1462 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1463 | break; | |
c9de560d AT |
1464 | case Opt_stripe: |
1465 | if (match_int(&args[0], &option)) | |
1466 | return 0; | |
1467 | if (option < 0) | |
1468 | return 0; | |
1469 | sbi->s_stripe = option; | |
1470 | break; | |
64769240 AT |
1471 | case Opt_delalloc: |
1472 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1473 | break; | |
240799cd TT |
1474 | case Opt_inode_readahead_blks: |
1475 | if (match_int(&args[0], &option)) | |
1476 | return 0; | |
1477 | if (option < 0 || option > (1 << 30)) | |
1478 | return 0; | |
3197ebdb TT |
1479 | if (option & (option - 1)) { |
1480 | printk(KERN_ERR "EXT4-fs: inode_readahead_blks" | |
1481 | " must be a power of 2\n"); | |
1482 | return 0; | |
1483 | } | |
240799cd TT |
1484 | sbi->s_inode_readahead_blks = option; |
1485 | break; | |
b3881f74 TT |
1486 | case Opt_journal_ioprio: |
1487 | if (match_int(&args[0], &option)) | |
1488 | return 0; | |
1489 | if (option < 0 || option > 7) | |
1490 | break; | |
1491 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1492 | option); | |
1493 | break; | |
ac27a0ec | 1494 | default: |
2b2d6d01 TT |
1495 | printk(KERN_ERR |
1496 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1497 | "or missing value\n", p); | |
ac27a0ec DK |
1498 | return 0; |
1499 | } | |
1500 | } | |
1501 | #ifdef CONFIG_QUOTA | |
1502 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1503 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1504 | sbi->s_qf_names[USRQUOTA]) |
1505 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1506 | ||
617ba13b | 1507 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1508 | sbi->s_qf_names[GRPQUOTA]) |
1509 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1510 | ||
1511 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1512 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1513 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1514 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1515 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1516 | "format mixing.\n"); |
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1521 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1522 | "not specified.\n"); |
1523 | return 0; | |
1524 | } | |
1525 | } else { | |
1526 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1527 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1528 | "specified with no journaling " | |
ac27a0ec DK |
1529 | "enabled.\n"); |
1530 | return 0; | |
1531 | } | |
1532 | } | |
1533 | #endif | |
1534 | return 1; | |
1535 | } | |
1536 | ||
617ba13b | 1537 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1538 | int read_only) |
1539 | { | |
617ba13b | 1540 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1541 | int res = 0; |
1542 | ||
617ba13b | 1543 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1544 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1545 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1546 | res = MS_RDONLY; |
1547 | } | |
1548 | if (read_only) | |
1549 | return res; | |
617ba13b | 1550 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1551 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1552 | "running e2fsck is recommended\n"); | |
617ba13b | 1553 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1554 | printk(KERN_WARNING |
1555 | "EXT4-fs warning: mounting fs with errors, " | |
1556 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1557 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1558 | le16_to_cpu(es->s_mnt_count) >= | |
1559 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1560 | printk(KERN_WARNING |
1561 | "EXT4-fs warning: maximal mount count reached, " | |
1562 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1563 | else if (le32_to_cpu(es->s_checkinterval) && |
1564 | (le32_to_cpu(es->s_lastcheck) + | |
1565 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1566 | printk(KERN_WARNING |
1567 | "EXT4-fs warning: checktime reached, " | |
1568 | "running e2fsck is recommended\n"); | |
0390131b FM |
1569 | if (!sbi->s_journal) |
1570 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); | |
ac27a0ec | 1571 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1572 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1573 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1574 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1575 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1576 | if (sbi->s_journal) |
1577 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1578 | |
617ba13b | 1579 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1580 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1581 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
ac27a0ec DK |
1582 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1583 | sb->s_blocksize, | |
1584 | sbi->s_groups_count, | |
617ba13b MC |
1585 | EXT4_BLOCKS_PER_GROUP(sb), |
1586 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1587 | sbi->s_mount_opt); |
1588 | ||
0390131b FM |
1589 | if (EXT4_SB(sb)->s_journal) { |
1590 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", | |
1591 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1592 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
1593 | } else { | |
1594 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); | |
1595 | } | |
ac27a0ec DK |
1596 | return res; |
1597 | } | |
1598 | ||
772cb7c8 JS |
1599 | static int ext4_fill_flex_info(struct super_block *sb) |
1600 | { | |
1601 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1602 | struct ext4_group_desc *gdp = NULL; | |
1603 | struct buffer_head *bh; | |
1604 | ext4_group_t flex_group_count; | |
1605 | ext4_group_t flex_group; | |
1606 | int groups_per_flex = 0; | |
772cb7c8 JS |
1607 | int i; |
1608 | ||
1609 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1610 | sbi->s_log_groups_per_flex = 0; | |
1611 | return 1; | |
1612 | } | |
1613 | ||
1614 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1615 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1616 | ||
c62a11fd FB |
1617 | /* We allocate both existing and potentially added groups */ |
1618 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1619 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1620 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
ec05e868 | 1621 | sbi->s_flex_groups = kzalloc(flex_group_count * |
772cb7c8 JS |
1622 | sizeof(struct flex_groups), GFP_KERNEL); |
1623 | if (sbi->s_flex_groups == NULL) { | |
ec05e868 | 1624 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
a9df9a49 | 1625 | "%u flex groups\n", flex_group_count); |
772cb7c8 JS |
1626 | goto failed; |
1627 | } | |
772cb7c8 | 1628 | |
772cb7c8 JS |
1629 | for (i = 0; i < sbi->s_groups_count; i++) { |
1630 | gdp = ext4_get_group_desc(sb, i, &bh); | |
1631 | ||
1632 | flex_group = ext4_flex_group(sbi, i); | |
9f24e420 TT |
1633 | atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, |
1634 | ext4_free_inodes_count(sb, gdp)); | |
1635 | atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, | |
1636 | ext4_free_blks_count(sb, gdp)); | |
7d39db14 TT |
1637 | atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, |
1638 | ext4_used_dirs_count(sb, gdp)); | |
772cb7c8 JS |
1639 | } |
1640 | ||
1641 | return 1; | |
1642 | failed: | |
1643 | return 0; | |
1644 | } | |
1645 | ||
717d50e4 AD |
1646 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1647 | struct ext4_group_desc *gdp) | |
1648 | { | |
1649 | __u16 crc = 0; | |
1650 | ||
1651 | if (sbi->s_es->s_feature_ro_compat & | |
1652 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1653 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1654 | __le32 le_group = cpu_to_le32(block_group); | |
1655 | ||
1656 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1657 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1658 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1659 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1660 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1661 | if ((sbi->s_es->s_feature_incompat & | |
1662 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1663 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1664 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1665 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1666 | offset); | |
1667 | } | |
1668 | ||
1669 | return cpu_to_le16(crc); | |
1670 | } | |
1671 | ||
1672 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1673 | struct ext4_group_desc *gdp) | |
1674 | { | |
1675 | if ((sbi->s_es->s_feature_ro_compat & | |
1676 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1677 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1678 | return 0; | |
1679 | ||
1680 | return 1; | |
1681 | } | |
1682 | ||
ac27a0ec | 1683 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1684 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1685 | { |
617ba13b MC |
1686 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1687 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1688 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1689 | ext4_fsblk_t block_bitmap; |
1690 | ext4_fsblk_t inode_bitmap; | |
1691 | ext4_fsblk_t inode_table; | |
ce421581 | 1692 | int flexbg_flag = 0; |
fd2d4291 | 1693 | ext4_group_t i; |
ac27a0ec | 1694 | |
ce421581 JS |
1695 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1696 | flexbg_flag = 1; | |
1697 | ||
af5bc92d | 1698 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1699 | |
197cd65a AM |
1700 | for (i = 0; i < sbi->s_groups_count; i++) { |
1701 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1702 | ||
ce421581 | 1703 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1704 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1705 | else |
1706 | last_block = first_block + | |
617ba13b | 1707 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1708 | |
8fadc143 | 1709 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1710 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 | 1711 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1712 | "Block bitmap for group %u not in group " |
5128273a | 1713 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1714 | return 0; |
1715 | } | |
8fadc143 | 1716 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1717 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 | 1718 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1719 | "Inode bitmap for group %u not in group " |
5128273a | 1720 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1721 | return 0; |
1722 | } | |
8fadc143 | 1723 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1724 | if (inode_table < first_block || |
2b2d6d01 | 1725 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 | 1726 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1727 | "Inode table for group %u not in group " |
5128273a | 1728 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1729 | return 0; |
1730 | } | |
b5f10eed | 1731 | spin_lock(sb_bgl_lock(sbi, i)); |
717d50e4 | 1732 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 | 1733 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1734 | "Checksum for group %u failed (%u!=%u)\n", |
c19204b0 JB |
1735 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
1736 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c LZ |
1737 | if (!(sb->s_flags & MS_RDONLY)) { |
1738 | spin_unlock(sb_bgl_lock(sbi, i)); | |
8a266467 | 1739 | return 0; |
7ee1ec4c | 1740 | } |
717d50e4 | 1741 | } |
b5f10eed | 1742 | spin_unlock(sb_bgl_lock(sbi, i)); |
ce421581 JS |
1743 | if (!flexbg_flag) |
1744 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1745 | } |
1746 | ||
bd81d8ee | 1747 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
2b2d6d01 | 1748 | sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1749 | return 1; |
1750 | } | |
1751 | ||
617ba13b | 1752 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1753 | * the superblock) which were deleted from all directories, but held open by |
1754 | * a process at the time of a crash. We walk the list and try to delete these | |
1755 | * inodes at recovery time (only with a read-write filesystem). | |
1756 | * | |
1757 | * In order to keep the orphan inode chain consistent during traversal (in | |
1758 | * case of crash during recovery), we link each inode into the superblock | |
1759 | * orphan list_head and handle it the same way as an inode deletion during | |
1760 | * normal operation (which journals the operations for us). | |
1761 | * | |
1762 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1763 | * accidentally point at an in-use or already deleted inode. The worst that | |
1764 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1765 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1766 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1767 | * inode cleanup for us, so we can safely abort without any further action. | |
1768 | */ | |
2b2d6d01 TT |
1769 | static void ext4_orphan_cleanup(struct super_block *sb, |
1770 | struct ext4_super_block *es) | |
ac27a0ec DK |
1771 | { |
1772 | unsigned int s_flags = sb->s_flags; | |
1773 | int nr_orphans = 0, nr_truncates = 0; | |
1774 | #ifdef CONFIG_QUOTA | |
1775 | int i; | |
1776 | #endif | |
1777 | if (!es->s_last_orphan) { | |
1778 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1779 | return; | |
1780 | } | |
1781 | ||
a8f48a95 ES |
1782 | if (bdev_read_only(sb->s_bdev)) { |
1783 | printk(KERN_ERR "EXT4-fs: write access " | |
1784 | "unavailable, skipping orphan cleanup.\n"); | |
1785 | return; | |
1786 | } | |
1787 | ||
617ba13b | 1788 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1789 | if (es->s_last_orphan) |
1790 | jbd_debug(1, "Errors on filesystem, " | |
1791 | "clearing orphan list.\n"); | |
1792 | es->s_last_orphan = 0; | |
1793 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1794 | return; | |
1795 | } | |
1796 | ||
1797 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1798 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1799 | sb->s_id); |
1800 | sb->s_flags &= ~MS_RDONLY; | |
1801 | } | |
1802 | #ifdef CONFIG_QUOTA | |
1803 | /* Needed for iput() to work correctly and not trash data */ | |
1804 | sb->s_flags |= MS_ACTIVE; | |
1805 | /* Turn on quotas so that they are updated correctly */ | |
1806 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1807 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1808 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1809 | if (ret < 0) |
1810 | printk(KERN_ERR | |
2c8be6b2 | 1811 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1812 | "quota: error %d\n", ret); |
1813 | } | |
1814 | } | |
1815 | #endif | |
1816 | ||
1817 | while (es->s_last_orphan) { | |
1818 | struct inode *inode; | |
1819 | ||
97bd42b9 JB |
1820 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1821 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1822 | es->s_last_orphan = 0; |
1823 | break; | |
1824 | } | |
1825 | ||
617ba13b | 1826 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 1827 | vfs_dq_init(inode); |
ac27a0ec DK |
1828 | if (inode->i_nlink) { |
1829 | printk(KERN_DEBUG | |
e5f8eab8 | 1830 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1831 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1832 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1833 | inode->i_ino, inode->i_size); |
617ba13b | 1834 | ext4_truncate(inode); |
ac27a0ec DK |
1835 | nr_truncates++; |
1836 | } else { | |
1837 | printk(KERN_DEBUG | |
1838 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1839 | __func__, inode->i_ino); |
ac27a0ec DK |
1840 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1841 | inode->i_ino); | |
1842 | nr_orphans++; | |
1843 | } | |
1844 | iput(inode); /* The delete magic happens here! */ | |
1845 | } | |
1846 | ||
2b2d6d01 | 1847 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1848 | |
1849 | if (nr_orphans) | |
617ba13b | 1850 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1851 | sb->s_id, PLURAL(nr_orphans)); |
1852 | if (nr_truncates) | |
617ba13b | 1853 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1854 | sb->s_id, PLURAL(nr_truncates)); |
1855 | #ifdef CONFIG_QUOTA | |
1856 | /* Turn quotas off */ | |
1857 | for (i = 0; i < MAXQUOTAS; i++) { | |
1858 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1859 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1860 | } |
1861 | #endif | |
1862 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1863 | } | |
cd2291a4 ES |
1864 | /* |
1865 | * Maximal extent format file size. | |
1866 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1867 | * extent format containers, within a sector_t, and within i_blocks | |
1868 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1869 | * so that won't be a limiting factor. | |
1870 | * | |
1871 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1872 | */ | |
f287a1a5 | 1873 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1874 | { |
1875 | loff_t res; | |
1876 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1877 | ||
1878 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1879 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1880 | /* |
b3a6ffe1 | 1881 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1882 | * i_block represent total blocks in 512 bytes |
1883 | * 32 == size of vfs inode i_blocks * 8 | |
1884 | */ | |
1885 | upper_limit = (1LL << 32) - 1; | |
1886 | ||
1887 | /* total blocks in file system block size */ | |
1888 | upper_limit >>= (blkbits - 9); | |
1889 | upper_limit <<= blkbits; | |
1890 | } | |
1891 | ||
1892 | /* 32-bit extent-start container, ee_block */ | |
1893 | res = 1LL << 32; | |
1894 | res <<= blkbits; | |
1895 | res -= 1; | |
1896 | ||
1897 | /* Sanity check against vm- & vfs- imposed limits */ | |
1898 | if (res > upper_limit) | |
1899 | res = upper_limit; | |
1900 | ||
1901 | return res; | |
1902 | } | |
ac27a0ec | 1903 | |
ac27a0ec | 1904 | /* |
cd2291a4 | 1905 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1906 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1907 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1908 | */ |
f287a1a5 | 1909 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1910 | { |
617ba13b | 1911 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1912 | int meta_blocks; |
1913 | loff_t upper_limit; | |
1914 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1915 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1916 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1917 | * does not exceed 2^48 -1 |
1918 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1919 | * total number of 512 bytes blocks of the file | |
1920 | */ | |
1921 | ||
f287a1a5 | 1922 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1923 | /* |
b3a6ffe1 | 1924 | * !has_huge_files or CONFIG_LBD is not enabled |
f287a1a5 TT |
1925 | * implies the inode i_block represent total blocks in |
1926 | * 512 bytes 32 == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1927 | */ |
1928 | upper_limit = (1LL << 32) - 1; | |
1929 | ||
1930 | /* total blocks in file system block size */ | |
1931 | upper_limit >>= (bits - 9); | |
1932 | ||
1933 | } else { | |
8180a562 AK |
1934 | /* |
1935 | * We use 48 bit ext4_inode i_blocks | |
1936 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
1937 | * represent total number of blocks in | |
1938 | * file system block size | |
1939 | */ | |
0fc1b451 AK |
1940 | upper_limit = (1LL << 48) - 1; |
1941 | ||
0fc1b451 AK |
1942 | } |
1943 | ||
1944 | /* indirect blocks */ | |
1945 | meta_blocks = 1; | |
1946 | /* double indirect blocks */ | |
1947 | meta_blocks += 1 + (1LL << (bits-2)); | |
1948 | /* tripple indirect blocks */ | |
1949 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1950 | ||
1951 | upper_limit -= meta_blocks; | |
1952 | upper_limit <<= bits; | |
ac27a0ec DK |
1953 | |
1954 | res += 1LL << (bits-2); | |
1955 | res += 1LL << (2*(bits-2)); | |
1956 | res += 1LL << (3*(bits-2)); | |
1957 | res <<= bits; | |
1958 | if (res > upper_limit) | |
1959 | res = upper_limit; | |
0fc1b451 AK |
1960 | |
1961 | if (res > MAX_LFS_FILESIZE) | |
1962 | res = MAX_LFS_FILESIZE; | |
1963 | ||
ac27a0ec DK |
1964 | return res; |
1965 | } | |
1966 | ||
617ba13b | 1967 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1968 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1969 | { |
617ba13b | 1970 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 1971 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
1972 | int has_super = 0; |
1973 | ||
1974 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
1975 | ||
617ba13b | 1976 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 1977 | nr < first_meta_bg) |
70bbb3e0 | 1978 | return logical_sb_block + nr + 1; |
ac27a0ec | 1979 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 1980 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 1981 | has_super = 1; |
617ba13b | 1982 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
1983 | } |
1984 | ||
c9de560d AT |
1985 | /** |
1986 | * ext4_get_stripe_size: Get the stripe size. | |
1987 | * @sbi: In memory super block info | |
1988 | * | |
1989 | * If we have specified it via mount option, then | |
1990 | * use the mount option value. If the value specified at mount time is | |
1991 | * greater than the blocks per group use the super block value. | |
1992 | * If the super block value is greater than blocks per group return 0. | |
1993 | * Allocator needs it be less than blocks per group. | |
1994 | * | |
1995 | */ | |
1996 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
1997 | { | |
1998 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
1999 | unsigned long stripe_width = | |
2000 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2001 | ||
2002 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2003 | return sbi->s_stripe; | |
2004 | ||
2005 | if (stripe_width <= sbi->s_blocks_per_group) | |
2006 | return stripe_width; | |
2007 | ||
2008 | if (stride <= sbi->s_blocks_per_group) | |
2009 | return stride; | |
2010 | ||
2011 | return 0; | |
2012 | } | |
ac27a0ec | 2013 | |
3197ebdb TT |
2014 | /* sysfs supprt */ |
2015 | ||
2016 | struct ext4_attr { | |
2017 | struct attribute attr; | |
2018 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2019 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2020 | const char *, size_t); | |
2021 | int offset; | |
2022 | }; | |
2023 | ||
2024 | static int parse_strtoul(const char *buf, | |
2025 | unsigned long max, unsigned long *value) | |
2026 | { | |
2027 | char *endp; | |
2028 | ||
2029 | while (*buf && isspace(*buf)) | |
2030 | buf++; | |
2031 | *value = simple_strtoul(buf, &endp, 0); | |
2032 | while (*endp && isspace(*endp)) | |
2033 | endp++; | |
2034 | if (*endp || *value > max) | |
2035 | return -EINVAL; | |
2036 | ||
2037 | return 0; | |
2038 | } | |
2039 | ||
2040 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2041 | struct ext4_sb_info *sbi, | |
2042 | char *buf) | |
2043 | { | |
2044 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2045 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2046 | } | |
2047 | ||
2048 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2049 | struct ext4_sb_info *sbi, char *buf) | |
2050 | { | |
2051 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2052 | ||
2053 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2054 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2055 | sbi->s_sectors_written_start) >> 1); | |
2056 | } | |
2057 | ||
2058 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2059 | struct ext4_sb_info *sbi, char *buf) | |
2060 | { | |
2061 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2062 | ||
2063 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2064 | sbi->s_kbytes_written + | |
2065 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2066 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
2067 | } | |
2068 | ||
2069 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2070 | struct ext4_sb_info *sbi, | |
2071 | const char *buf, size_t count) | |
2072 | { | |
2073 | unsigned long t; | |
2074 | ||
2075 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2076 | return -EINVAL; | |
2077 | ||
2078 | /* inode_readahead_blks must be a power of 2 */ | |
2079 | if (t & (t-1)) | |
2080 | return -EINVAL; | |
2081 | ||
2082 | sbi->s_inode_readahead_blks = t; | |
2083 | return count; | |
2084 | } | |
2085 | ||
2086 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
2087 | struct ext4_sb_info *sbi, char *buf) | |
2088 | { | |
2089 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2090 | ||
2091 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2092 | } | |
2093 | ||
2094 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2095 | struct ext4_sb_info *sbi, | |
2096 | const char *buf, size_t count) | |
2097 | { | |
2098 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2099 | unsigned long t; | |
2100 | ||
2101 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2102 | return -EINVAL; | |
2103 | *ui = t; | |
2104 | return count; | |
2105 | } | |
2106 | ||
2107 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2108 | static struct ext4_attr ext4_attr_##_name = { \ | |
2109 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2110 | .show = _show, \ | |
2111 | .store = _store, \ | |
2112 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2113 | } | |
2114 | #define EXT4_ATTR(name, mode, show, store) \ | |
2115 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2116 | ||
2117 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2118 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2119 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2120 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2121 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2122 | ||
2123 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2124 | EXT4_RO_ATTR(session_write_kbytes); | |
2125 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2126 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2127 | inode_readahead_blks_store, s_inode_readahead_blks); | |
2128 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); | |
2129 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2130 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2131 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2132 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2133 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
2134 | ||
2135 | static struct attribute *ext4_attrs[] = { | |
2136 | ATTR_LIST(delayed_allocation_blocks), | |
2137 | ATTR_LIST(session_write_kbytes), | |
2138 | ATTR_LIST(lifetime_write_kbytes), | |
2139 | ATTR_LIST(inode_readahead_blks), | |
2140 | ATTR_LIST(mb_stats), | |
2141 | ATTR_LIST(mb_max_to_scan), | |
2142 | ATTR_LIST(mb_min_to_scan), | |
2143 | ATTR_LIST(mb_order2_req), | |
2144 | ATTR_LIST(mb_stream_req), | |
2145 | ATTR_LIST(mb_group_prealloc), | |
2146 | NULL, | |
2147 | }; | |
2148 | ||
2149 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2150 | struct attribute *attr, char *buf) | |
2151 | { | |
2152 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2153 | s_kobj); | |
2154 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2155 | ||
2156 | return a->show ? a->show(a, sbi, buf) : 0; | |
2157 | } | |
2158 | ||
2159 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2160 | struct attribute *attr, | |
2161 | const char *buf, size_t len) | |
2162 | { | |
2163 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2164 | s_kobj); | |
2165 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2166 | ||
2167 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2168 | } | |
2169 | ||
2170 | static void ext4_sb_release(struct kobject *kobj) | |
2171 | { | |
2172 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2173 | s_kobj); | |
2174 | complete(&sbi->s_kobj_unregister); | |
2175 | } | |
2176 | ||
2177 | ||
2178 | static struct sysfs_ops ext4_attr_ops = { | |
2179 | .show = ext4_attr_show, | |
2180 | .store = ext4_attr_store, | |
2181 | }; | |
2182 | ||
2183 | static struct kobj_type ext4_ktype = { | |
2184 | .default_attrs = ext4_attrs, | |
2185 | .sysfs_ops = &ext4_attr_ops, | |
2186 | .release = ext4_sb_release, | |
2187 | }; | |
2188 | ||
2b2d6d01 | 2189 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2190 | __releases(kernel_lock) |
2191 | __acquires(kernel_lock) | |
1d03ec98 | 2192 | |
ac27a0ec | 2193 | { |
2b2d6d01 | 2194 | struct buffer_head *bh; |
617ba13b MC |
2195 | struct ext4_super_block *es = NULL; |
2196 | struct ext4_sb_info *sbi; | |
2197 | ext4_fsblk_t block; | |
2198 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2199 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2200 | unsigned long offset = 0; |
ac27a0ec DK |
2201 | unsigned long journal_devnum = 0; |
2202 | unsigned long def_mount_opts; | |
2203 | struct inode *root; | |
9f6200bb | 2204 | char *cp; |
0390131b | 2205 | const char *descr; |
1d1fe1ee | 2206 | int ret = -EINVAL; |
ac27a0ec | 2207 | int blocksize; |
4ec11028 TT |
2208 | unsigned int db_count; |
2209 | unsigned int i; | |
f287a1a5 | 2210 | int needs_recovery, has_huge_files; |
3a06d778 | 2211 | int features; |
bd81d8ee | 2212 | __u64 blocks_count; |
833f4077 | 2213 | int err; |
b3881f74 | 2214 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2215 | |
2216 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2217 | if (!sbi) | |
2218 | return -ENOMEM; | |
705895b6 PE |
2219 | |
2220 | sbi->s_blockgroup_lock = | |
2221 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2222 | if (!sbi->s_blockgroup_lock) { | |
2223 | kfree(sbi); | |
2224 | return -ENOMEM; | |
2225 | } | |
ac27a0ec DK |
2226 | sb->s_fs_info = sbi; |
2227 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2228 | sbi->s_resuid = EXT4_DEF_RESUID; |
2229 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2230 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2231 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2232 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2233 | sectors[1]); | |
ac27a0ec DK |
2234 | |
2235 | unlock_kernel(); | |
2236 | ||
9f6200bb TT |
2237 | /* Cleanup superblock name */ |
2238 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2239 | *cp = '!'; | |
2240 | ||
617ba13b | 2241 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2242 | if (!blocksize) { |
617ba13b | 2243 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
2244 | goto out_fail; |
2245 | } | |
2246 | ||
2247 | /* | |
617ba13b | 2248 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2249 | * block sizes. We need to calculate the offset from buffer start. |
2250 | */ | |
617ba13b | 2251 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2252 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2253 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2254 | } else { |
70bbb3e0 | 2255 | logical_sb_block = sb_block; |
ac27a0ec DK |
2256 | } |
2257 | ||
70bbb3e0 | 2258 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 2259 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
2260 | goto out_fail; |
2261 | } | |
2262 | /* | |
2263 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2264 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2265 | */ |
617ba13b | 2266 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2267 | sbi->s_es = es; |
2268 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2269 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2270 | goto cantfind_ext4; | |
afc32f7e | 2271 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2272 | |
2273 | /* Set defaults before we parse the mount options */ | |
2274 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2275 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2276 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2277 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2278 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2279 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2280 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2281 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2282 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2283 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2284 | #endif |
03010a33 | 2285 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2286 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2287 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2288 | #endif |
617ba13b MC |
2289 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2290 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2291 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2292 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2293 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2294 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2295 | ||
2296 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2297 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2298 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2299 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2300 | else |
2301 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2302 | |
2303 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2304 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2305 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2306 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2307 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec DK |
2308 | |
2309 | set_opt(sbi->s_mount_opt, RESERVATION); | |
571640ca | 2310 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2311 | |
dd919b98 AK |
2312 | /* |
2313 | * enable delayed allocation by default | |
2314 | * Use -o nodelalloc to turn it off | |
2315 | */ | |
2316 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2317 | ||
2318 | ||
b3881f74 TT |
2319 | if (!parse_options((char *) data, sb, &journal_devnum, |
2320 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2321 | goto failed_mount; |
2322 | ||
2323 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2324 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2325 | |
617ba13b MC |
2326 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2327 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2328 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2329 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 2330 | printk(KERN_WARNING |
617ba13b | 2331 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 2332 | "running e2fsck is recommended\n"); |
469108ff | 2333 | |
ac27a0ec DK |
2334 | /* |
2335 | * Check feature flags regardless of the revision level, since we | |
2336 | * previously didn't change the revision level when setting the flags, | |
2337 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2338 | */ | |
617ba13b | 2339 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2340 | if (features) { |
617ba13b | 2341 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
3a06d778 AK |
2342 | "unsupported optional features (%x).\n", sb->s_id, |
2343 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2344 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
ac27a0ec DK |
2345 | goto failed_mount; |
2346 | } | |
617ba13b | 2347 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2348 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2349 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
3a06d778 AK |
2350 | "unsupported optional features (%x).\n", sb->s_id, |
2351 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2352 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
2353 | goto failed_mount; |
2354 | } | |
f287a1a5 TT |
2355 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2356 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2357 | if (has_huge_files) { | |
0fc1b451 AK |
2358 | /* |
2359 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2360 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2361 | */ |
2362 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2363 | !(sb->s_flags & MS_RDONLY)) { | |
2364 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2365 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2366 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2367 | goto failed_mount; |
2368 | } | |
2369 | } | |
ac27a0ec DK |
2370 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2371 | ||
617ba13b MC |
2372 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2373 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2374 | printk(KERN_ERR |
617ba13b | 2375 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2376 | blocksize, sb->s_id); |
2377 | goto failed_mount; | |
2378 | } | |
2379 | ||
ac27a0ec | 2380 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2381 | |
2382 | /* Validate the filesystem blocksize */ | |
2383 | if (!sb_set_blocksize(sb, blocksize)) { | |
2384 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2385 | blocksize); | |
ac27a0ec DK |
2386 | goto failed_mount; |
2387 | } | |
2388 | ||
2b2d6d01 | 2389 | brelse(bh); |
70bbb3e0 AM |
2390 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2391 | offset = do_div(logical_sb_block, blocksize); | |
2392 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2393 | if (!bh) { |
2394 | printk(KERN_ERR | |
617ba13b | 2395 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2396 | goto failed_mount; |
2397 | } | |
617ba13b | 2398 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2399 | sbi->s_es = es; |
617ba13b | 2400 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2401 | printk(KERN_ERR |
2402 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2403 | goto failed_mount; |
2404 | } | |
2405 | } | |
2406 | ||
f287a1a5 TT |
2407 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2408 | has_huge_files); | |
2409 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2410 | |
617ba13b MC |
2411 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2412 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2413 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2414 | } else { |
2415 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2416 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2417 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2418 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2419 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2420 | printk(KERN_ERR |
2421 | "EXT4-fs: unsupported inode size: %d\n", | |
2422 | sbi->s_inode_size); | |
ac27a0ec DK |
2423 | goto failed_mount; |
2424 | } | |
ef7f3835 KS |
2425 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2426 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2427 | } |
0d1ee42f AR |
2428 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2429 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2430 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2431 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2432 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2433 | printk(KERN_ERR |
8fadc143 | 2434 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2435 | sbi->s_desc_size); |
2436 | goto failed_mount; | |
2437 | } | |
2438 | } else | |
2439 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2440 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2441 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2442 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2443 | goto cantfind_ext4; |
2444 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2445 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2446 | goto cantfind_ext4; |
ac27a0ec DK |
2447 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2448 | sbi->s_inodes_per_block; | |
0d1ee42f | 2449 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2450 | sbi->s_sbh = bh; |
2451 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2452 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2453 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
2b2d6d01 | 2454 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2455 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2456 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2457 | i = le32_to_cpu(es->s_flags); |
2458 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2459 | sbi->s_hash_unsigned = 3; | |
2460 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2461 | #ifdef __CHAR_UNSIGNED__ | |
2462 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2463 | sbi->s_hash_unsigned = 3; | |
2464 | #else | |
2465 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2466 | #endif | |
2467 | sb->s_dirt = 1; | |
2468 | } | |
ac27a0ec DK |
2469 | |
2470 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2471 | printk(KERN_ERR |
2472 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2473 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2474 | goto failed_mount; |
2475 | } | |
ac27a0ec | 2476 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2477 | printk(KERN_ERR |
2478 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2479 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2480 | goto failed_mount; |
2481 | } | |
2482 | ||
bd81d8ee | 2483 | if (ext4_blocks_count(es) > |
ac27a0ec | 2484 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2485 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2486 | " too large to mount safely\n", sb->s_id); |
2487 | if (sizeof(sector_t) < 8) | |
617ba13b | 2488 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2489 | "enabled\n"); |
2490 | goto failed_mount; | |
2491 | } | |
2492 | ||
617ba13b MC |
2493 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2494 | goto cantfind_ext4; | |
e7c95593 | 2495 | |
4ec11028 TT |
2496 | /* |
2497 | * It makes no sense for the first data block to be beyond the end | |
2498 | * of the filesystem. | |
2499 | */ | |
2500 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
2501 | printk(KERN_WARNING "EXT4-fs: bad geometry: first data" | |
2502 | "block %u is beyond end of filesystem (%llu)\n", | |
2503 | le32_to_cpu(es->s_first_data_block), | |
2504 | ext4_blocks_count(es)); | |
e7c95593 ES |
2505 | goto failed_mount; |
2506 | } | |
bd81d8ee LV |
2507 | blocks_count = (ext4_blocks_count(es) - |
2508 | le32_to_cpu(es->s_first_data_block) + | |
2509 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2510 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 TT |
2511 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
2512 | printk(KERN_WARNING "EXT4-fs: groups count too large: %u " | |
2513 | "(block count %llu, first data block %u, " | |
2514 | "blocks per group %lu)\n", sbi->s_groups_count, | |
2515 | ext4_blocks_count(es), | |
2516 | le32_to_cpu(es->s_first_data_block), | |
2517 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2518 | goto failed_mount; | |
2519 | } | |
bd81d8ee | 2520 | sbi->s_groups_count = blocks_count; |
617ba13b MC |
2521 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2522 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2523 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2524 | GFP_KERNEL); |
2525 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2526 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2527 | goto failed_mount; |
2528 | } | |
2529 | ||
3244fcb1 | 2530 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2531 | if (ext4_proc_root) |
2532 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2533 | #endif |
240799cd | 2534 | |
705895b6 | 2535 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2536 | |
2537 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2538 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2539 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2540 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2541 | printk(KERN_ERR "EXT4-fs: " |
2542 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2543 | db_count = i; |
2544 | goto failed_mount2; | |
2545 | } | |
2546 | } | |
2b2d6d01 | 2547 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2548 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2549 | goto failed_mount2; |
2550 | } | |
772cb7c8 JS |
2551 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2552 | if (!ext4_fill_flex_info(sb)) { | |
2553 | printk(KERN_ERR | |
2554 | "EXT4-fs: unable to initialize " | |
2555 | "flex_bg meta info!\n"); | |
2556 | goto failed_mount2; | |
2557 | } | |
2558 | ||
ac27a0ec DK |
2559 | sbi->s_gdb_count = db_count; |
2560 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2561 | spin_lock_init(&sbi->s_next_gen_lock); | |
2562 | ||
833f4077 PZ |
2563 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2564 | ext4_count_free_blocks(sb)); | |
2565 | if (!err) { | |
2566 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2567 | ext4_count_free_inodes(sb)); | |
2568 | } | |
2569 | if (!err) { | |
2570 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2571 | ext4_count_dirs(sb)); | |
2572 | } | |
6bc6e63f AK |
2573 | if (!err) { |
2574 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2575 | } | |
833f4077 PZ |
2576 | if (err) { |
2577 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2578 | goto failed_mount3; | |
2579 | } | |
ac27a0ec | 2580 | |
c9de560d AT |
2581 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2582 | ||
ac27a0ec DK |
2583 | /* |
2584 | * set up enough so that it can read an inode | |
2585 | */ | |
617ba13b MC |
2586 | sb->s_op = &ext4_sops; |
2587 | sb->s_export_op = &ext4_export_ops; | |
2588 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2589 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2590 | sb->s_qcop = &ext4_qctl_operations; |
2591 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2592 | #endif |
2593 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
2594 | ||
2595 | sb->s_root = NULL; | |
2596 | ||
2597 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2598 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2599 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2600 | |
2601 | /* | |
2602 | * The first inode we look at is the journal inode. Don't try | |
2603 | * root first: it may be modified in the journal! | |
2604 | */ | |
2605 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2606 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2607 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2608 | goto failed_mount3; |
624080ed TT |
2609 | if (!(sb->s_flags & MS_RDONLY) && |
2610 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2611 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2612 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2613 | "%u is corrupt\n", sb->s_id, |
624080ed | 2614 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2615 | if (test_opt(sb, ERRORS_RO)) { |
2616 | printk(KERN_CRIT | |
2617 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2618 | sb->s_flags |= MS_RDONLY; |
2619 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2620 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2621 | } | |
2622 | if (test_opt(sb, ERRORS_PANIC)) { | |
2623 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2624 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2625 | ext4_commit_super(sb, es, 1); | |
624080ed TT |
2626 | goto failed_mount4; |
2627 | } | |
2628 | } | |
0390131b FM |
2629 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2630 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
2631 | printk(KERN_ERR "EXT4-fs: required journal recovery " | |
2632 | "suppressed and not mounted read-only\n"); | |
2633 | goto failed_mount4; | |
ac27a0ec | 2634 | } else { |
0390131b FM |
2635 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2636 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2637 | sbi->s_journal = NULL; | |
2638 | needs_recovery = 0; | |
2639 | goto no_journal; | |
ac27a0ec DK |
2640 | } |
2641 | ||
eb40a09c JS |
2642 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2643 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2644 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
abda1418 | 2645 | printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); |
eb40a09c JS |
2646 | goto failed_mount4; |
2647 | } | |
2648 | ||
818d276c GS |
2649 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2650 | jbd2_journal_set_features(sbi->s_journal, | |
2651 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2652 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2653 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2654 | jbd2_journal_set_features(sbi->s_journal, | |
2655 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2656 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2657 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2658 | } else { | |
2659 | jbd2_journal_clear_features(sbi->s_journal, | |
2660 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2661 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2662 | } | |
2663 | ||
ac27a0ec DK |
2664 | /* We have now updated the journal if required, so we can |
2665 | * validate the data journaling mode. */ | |
2666 | switch (test_opt(sb, DATA_FLAGS)) { | |
2667 | case 0: | |
2668 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2669 | * capabilities: ORDERED_DATA if the journal can |
2670 | * cope, else JOURNAL_DATA | |
2671 | */ | |
dab291af MC |
2672 | if (jbd2_journal_check_available_features |
2673 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2674 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2675 | else | |
2676 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2677 | break; | |
2678 | ||
617ba13b MC |
2679 | case EXT4_MOUNT_ORDERED_DATA: |
2680 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2681 | if (!jbd2_journal_check_available_features |
2682 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2683 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2684 | "requested data journaling mode\n"); |
2685 | goto failed_mount4; | |
2686 | } | |
2687 | default: | |
2688 | break; | |
2689 | } | |
b3881f74 | 2690 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2691 | |
0390131b | 2692 | no_journal: |
ac27a0ec DK |
2693 | |
2694 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2695 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2696 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2697 | "its supported only with writeback mode\n"); |
2698 | clear_opt(sbi->s_mount_opt, NOBH); | |
2699 | } | |
2700 | } | |
2701 | /* | |
dab291af | 2702 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2703 | * so we can safely mount the rest of the filesystem now. |
2704 | */ | |
2705 | ||
1d1fe1ee DH |
2706 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2707 | if (IS_ERR(root)) { | |
617ba13b | 2708 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2709 | ret = PTR_ERR(root); |
ac27a0ec DK |
2710 | goto failed_mount4; |
2711 | } | |
2712 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2713 | iput(root); |
617ba13b | 2714 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2715 | goto failed_mount4; |
2716 | } | |
1d1fe1ee DH |
2717 | sb->s_root = d_alloc_root(root); |
2718 | if (!sb->s_root) { | |
2719 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2720 | iput(root); | |
2721 | ret = -ENOMEM; | |
2722 | goto failed_mount4; | |
2723 | } | |
ac27a0ec | 2724 | |
2b2d6d01 | 2725 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2726 | |
2727 | /* determine the minimum size of new large inodes, if present */ | |
2728 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2729 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2730 | EXT4_GOOD_OLD_INODE_SIZE; | |
2731 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2732 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2733 | if (sbi->s_want_extra_isize < | |
2734 | le16_to_cpu(es->s_want_extra_isize)) | |
2735 | sbi->s_want_extra_isize = | |
2736 | le16_to_cpu(es->s_want_extra_isize); | |
2737 | if (sbi->s_want_extra_isize < | |
2738 | le16_to_cpu(es->s_min_extra_isize)) | |
2739 | sbi->s_want_extra_isize = | |
2740 | le16_to_cpu(es->s_min_extra_isize); | |
2741 | } | |
2742 | } | |
2743 | /* Check if enough inode space is available */ | |
2744 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2745 | sbi->s_inode_size) { | |
2746 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2747 | EXT4_GOOD_OLD_INODE_SIZE; | |
2748 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2749 | "available.\n"); | |
2750 | } | |
2751 | ||
c2774d84 AK |
2752 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2753 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2754 | "requested data journaling mode\n"); | |
2755 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2756 | } else if (test_opt(sb, DELALLOC)) | |
2757 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2758 | ||
2759 | ext4_ext_init(sb); | |
2760 | err = ext4_mb_init(sb, needs_recovery); | |
2761 | if (err) { | |
2762 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2763 | err); | |
2764 | goto failed_mount4; | |
2765 | } | |
2766 | ||
3197ebdb TT |
2767 | sbi->s_kobj.kset = ext4_kset; |
2768 | init_completion(&sbi->s_kobj_unregister); | |
2769 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
2770 | "%s", sb->s_id); | |
2771 | if (err) { | |
2772 | ext4_mb_release(sb); | |
2773 | ext4_ext_release(sb); | |
2774 | goto failed_mount4; | |
2775 | }; | |
2776 | ||
ac27a0ec DK |
2777 | /* |
2778 | * akpm: core read_super() calls in here with the superblock locked. | |
2779 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
2780 | * in numerous places. Here we just pop the lock - it's relatively | |
2781 | * harmless, because we are now ready to accept write_super() requests, | |
2782 | * and aviro says that's the only reason for hanging onto the | |
2783 | * superblock lock. | |
2784 | */ | |
617ba13b MC |
2785 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2786 | ext4_orphan_cleanup(sb, es); | |
2787 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2788 | if (needs_recovery) { |
2b2d6d01 | 2789 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
0390131b FM |
2790 | ext4_mark_recovery_complete(sb, es); |
2791 | } | |
2792 | if (EXT4_SB(sb)->s_journal) { | |
2793 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2794 | descr = " journalled data mode"; | |
2795 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2796 | descr = " ordered data mode"; | |
2797 | else | |
2798 | descr = " writeback data mode"; | |
2799 | } else | |
2800 | descr = "out journal"; | |
2801 | ||
2802 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", | |
2803 | sb->s_id, descr); | |
ac27a0ec DK |
2804 | |
2805 | lock_kernel(); | |
2806 | return 0; | |
2807 | ||
617ba13b | 2808 | cantfind_ext4: |
ac27a0ec | 2809 | if (!silent) |
617ba13b | 2810 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2811 | sb->s_id); |
2812 | goto failed_mount; | |
2813 | ||
2814 | failed_mount4: | |
0390131b FM |
2815 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
2816 | if (sbi->s_journal) { | |
2817 | jbd2_journal_destroy(sbi->s_journal); | |
2818 | sbi->s_journal = NULL; | |
2819 | } | |
ac27a0ec DK |
2820 | failed_mount3: |
2821 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2822 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2823 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2824 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2825 | failed_mount2: |
2826 | for (i = 0; i < db_count; i++) | |
2827 | brelse(sbi->s_group_desc[i]); | |
2828 | kfree(sbi->s_group_desc); | |
2829 | failed_mount: | |
240799cd | 2830 | if (sbi->s_proc) { |
9f6200bb | 2831 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2832 | } |
ac27a0ec DK |
2833 | #ifdef CONFIG_QUOTA |
2834 | for (i = 0; i < MAXQUOTAS; i++) | |
2835 | kfree(sbi->s_qf_names[i]); | |
2836 | #endif | |
617ba13b | 2837 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2838 | brelse(bh); |
2839 | out_fail: | |
2840 | sb->s_fs_info = NULL; | |
2841 | kfree(sbi); | |
2842 | lock_kernel(); | |
1d1fe1ee | 2843 | return ret; |
ac27a0ec DK |
2844 | } |
2845 | ||
2846 | /* | |
2847 | * Setup any per-fs journal parameters now. We'll do this both on | |
2848 | * initial mount, once the journal has been initialised but before we've | |
2849 | * done any recovery; and again on any subsequent remount. | |
2850 | */ | |
617ba13b | 2851 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2852 | { |
617ba13b | 2853 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2854 | |
30773840 TT |
2855 | journal->j_commit_interval = sbi->s_commit_interval; |
2856 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2857 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2858 | |
2859 | spin_lock(&journal->j_state_lock); | |
2860 | if (test_opt(sb, BARRIER)) | |
dab291af | 2861 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2862 | else |
dab291af | 2863 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2864 | if (test_opt(sb, DATA_ERR_ABORT)) |
2865 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2866 | else | |
2867 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2868 | spin_unlock(&journal->j_state_lock); |
2869 | } | |
2870 | ||
617ba13b | 2871 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2872 | unsigned int journal_inum) |
2873 | { | |
2874 | struct inode *journal_inode; | |
2875 | journal_t *journal; | |
2876 | ||
0390131b FM |
2877 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2878 | ||
ac27a0ec DK |
2879 | /* First, test for the existence of a valid inode on disk. Bad |
2880 | * things happen if we iget() an unused inode, as the subsequent | |
2881 | * iput() will try to delete it. */ | |
2882 | ||
1d1fe1ee DH |
2883 | journal_inode = ext4_iget(sb, journal_inum); |
2884 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2885 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2886 | return NULL; |
2887 | } | |
2888 | if (!journal_inode->i_nlink) { | |
2889 | make_bad_inode(journal_inode); | |
2890 | iput(journal_inode); | |
617ba13b | 2891 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2892 | return NULL; |
2893 | } | |
2894 | ||
e5f8eab8 | 2895 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2896 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2897 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2898 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2899 | iput(journal_inode); |
2900 | return NULL; | |
2901 | } | |
2902 | ||
dab291af | 2903 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2904 | if (!journal) { |
617ba13b | 2905 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2906 | iput(journal_inode); |
2907 | return NULL; | |
2908 | } | |
2909 | journal->j_private = sb; | |
617ba13b | 2910 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2911 | return journal; |
2912 | } | |
2913 | ||
617ba13b | 2914 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2915 | dev_t j_dev) |
2916 | { | |
2b2d6d01 | 2917 | struct buffer_head *bh; |
ac27a0ec | 2918 | journal_t *journal; |
617ba13b MC |
2919 | ext4_fsblk_t start; |
2920 | ext4_fsblk_t len; | |
ac27a0ec | 2921 | int hblock, blocksize; |
617ba13b | 2922 | ext4_fsblk_t sb_block; |
ac27a0ec | 2923 | unsigned long offset; |
2b2d6d01 | 2924 | struct ext4_super_block *es; |
ac27a0ec DK |
2925 | struct block_device *bdev; |
2926 | ||
0390131b FM |
2927 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2928 | ||
617ba13b | 2929 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2930 | if (bdev == NULL) |
2931 | return NULL; | |
2932 | ||
2933 | if (bd_claim(bdev, sb)) { | |
2934 | printk(KERN_ERR | |
abda1418 | 2935 | "EXT4-fs: failed to claim external journal device.\n"); |
9a1c3542 | 2936 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
2937 | return NULL; |
2938 | } | |
2939 | ||
2940 | blocksize = sb->s_blocksize; | |
2941 | hblock = bdev_hardsect_size(bdev); | |
2942 | if (blocksize < hblock) { | |
2943 | printk(KERN_ERR | |
617ba13b | 2944 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2945 | goto out_bdev; |
2946 | } | |
2947 | ||
617ba13b MC |
2948 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2949 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2950 | set_blocksize(bdev, blocksize); |
2951 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2952 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2953 | "external journal\n"); |
2954 | goto out_bdev; | |
2955 | } | |
2956 | ||
617ba13b MC |
2957 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2958 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2959 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2960 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
2961 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
2962 | "bad superblock\n"); |
2963 | brelse(bh); | |
2964 | goto out_bdev; | |
2965 | } | |
2966 | ||
617ba13b MC |
2967 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
2968 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
2969 | brelse(bh); |
2970 | goto out_bdev; | |
2971 | } | |
2972 | ||
bd81d8ee | 2973 | len = ext4_blocks_count(es); |
ac27a0ec DK |
2974 | start = sb_block + 1; |
2975 | brelse(bh); /* we're done with the superblock */ | |
2976 | ||
dab291af | 2977 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
2978 | start, len, blocksize); |
2979 | if (!journal) { | |
617ba13b | 2980 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
2981 | goto out_bdev; |
2982 | } | |
2983 | journal->j_private = sb; | |
2984 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2985 | wait_on_buffer(journal->j_sb_buffer); | |
2986 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 2987 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
2988 | goto out_journal; |
2989 | } | |
2990 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 2991 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
2992 | "user (unsupported) - %d\n", |
2993 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2994 | goto out_journal; | |
2995 | } | |
617ba13b MC |
2996 | EXT4_SB(sb)->journal_bdev = bdev; |
2997 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
2998 | return journal; |
2999 | out_journal: | |
dab291af | 3000 | jbd2_journal_destroy(journal); |
ac27a0ec | 3001 | out_bdev: |
617ba13b | 3002 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3003 | return NULL; |
3004 | } | |
3005 | ||
617ba13b MC |
3006 | static int ext4_load_journal(struct super_block *sb, |
3007 | struct ext4_super_block *es, | |
ac27a0ec DK |
3008 | unsigned long journal_devnum) |
3009 | { | |
3010 | journal_t *journal; | |
3011 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3012 | dev_t journal_dev; | |
3013 | int err = 0; | |
3014 | int really_read_only; | |
3015 | ||
0390131b FM |
3016 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3017 | ||
ac27a0ec DK |
3018 | if (journal_devnum && |
3019 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 3020 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
3021 | "numbers have changed\n"); |
3022 | journal_dev = new_decode_dev(journal_devnum); | |
3023 | } else | |
3024 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3025 | ||
3026 | really_read_only = bdev_read_only(sb->s_bdev); | |
3027 | ||
3028 | /* | |
3029 | * Are we loading a blank journal or performing recovery after a | |
3030 | * crash? For recovery, we need to check in advance whether we | |
3031 | * can get read-write access to the device. | |
3032 | */ | |
3033 | ||
617ba13b | 3034 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3035 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 3036 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
3037 | "required on readonly filesystem.\n"); |
3038 | if (really_read_only) { | |
617ba13b | 3039 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
3040 | "unavailable, cannot proceed.\n"); |
3041 | return -EROFS; | |
3042 | } | |
2b2d6d01 TT |
3043 | printk(KERN_INFO "EXT4-fs: write access will " |
3044 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
3045 | } |
3046 | } | |
3047 | ||
3048 | if (journal_inum && journal_dev) { | |
617ba13b | 3049 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
3050 | "and inode journals!\n"); |
3051 | return -EINVAL; | |
3052 | } | |
3053 | ||
3054 | if (journal_inum) { | |
617ba13b | 3055 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3056 | return -EINVAL; |
3057 | } else { | |
617ba13b | 3058 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3059 | return -EINVAL; |
3060 | } | |
3061 | ||
4776004f TT |
3062 | if (journal->j_flags & JBD2_BARRIER) |
3063 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
3064 | else | |
3065 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
3066 | ||
ac27a0ec | 3067 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3068 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3069 | if (err) { |
617ba13b | 3070 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 3071 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3072 | return err; |
3073 | } | |
3074 | } | |
3075 | ||
617ba13b | 3076 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3077 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3078 | if (!err) |
dab291af | 3079 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3080 | |
3081 | if (err) { | |
617ba13b | 3082 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 3083 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3084 | return err; |
3085 | } | |
3086 | ||
617ba13b MC |
3087 | EXT4_SB(sb)->s_journal = journal; |
3088 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3089 | |
3090 | if (journal_devnum && | |
3091 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3092 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
3093 | sb->s_dirt = 1; | |
3094 | ||
3095 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 3096 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
3097 | } |
3098 | ||
3099 | return 0; | |
3100 | } | |
3101 | ||
c4be0c1d | 3102 | static int ext4_commit_super(struct super_block *sb, |
2b2d6d01 | 3103 | struct ext4_super_block *es, int sync) |
ac27a0ec | 3104 | { |
617ba13b | 3105 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3106 | int error = 0; |
ac27a0ec DK |
3107 | |
3108 | if (!sbh) | |
c4be0c1d | 3109 | return error; |
914258bf TT |
3110 | if (buffer_write_io_error(sbh)) { |
3111 | /* | |
3112 | * Oh, dear. A previous attempt to write the | |
3113 | * superblock failed. This could happen because the | |
3114 | * USB device was yanked out. Or it could happen to | |
3115 | * be a transient write error and maybe the block will | |
3116 | * be remapped. Nothing we can do but to retry the | |
3117 | * write and hope for the best. | |
3118 | */ | |
abda1418 | 3119 | printk(KERN_ERR "EXT4-fs: previous I/O error to " |
914258bf TT |
3120 | "superblock detected for %s.\n", sb->s_id); |
3121 | clear_buffer_write_io_error(sbh); | |
3122 | set_buffer_uptodate(sbh); | |
3123 | } | |
ac27a0ec | 3124 | es->s_wtime = cpu_to_le32(get_seconds()); |
afc32f7e TT |
3125 | es->s_kbytes_written = |
3126 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3127 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3128 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3129 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3130 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3131 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3132 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
3133 | ||
ac27a0ec DK |
3134 | BUFFER_TRACE(sbh, "marking dirty"); |
3135 | mark_buffer_dirty(sbh); | |
914258bf | 3136 | if (sync) { |
c4be0c1d TS |
3137 | error = sync_dirty_buffer(sbh); |
3138 | if (error) | |
3139 | return error; | |
3140 | ||
3141 | error = buffer_write_io_error(sbh); | |
3142 | if (error) { | |
abda1418 | 3143 | printk(KERN_ERR "EXT4-fs: I/O error while writing " |
914258bf TT |
3144 | "superblock for %s.\n", sb->s_id); |
3145 | clear_buffer_write_io_error(sbh); | |
3146 | set_buffer_uptodate(sbh); | |
3147 | } | |
3148 | } | |
c4be0c1d | 3149 | return error; |
ac27a0ec DK |
3150 | } |
3151 | ||
3152 | ||
3153 | /* | |
3154 | * Have we just finished recovery? If so, and if we are mounting (or | |
3155 | * remounting) the filesystem readonly, then we will end up with a | |
3156 | * consistent fs on disk. Record that fact. | |
3157 | */ | |
2b2d6d01 TT |
3158 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3159 | struct ext4_super_block *es) | |
ac27a0ec | 3160 | { |
617ba13b | 3161 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3162 | |
0390131b FM |
3163 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3164 | BUG_ON(journal != NULL); | |
3165 | return; | |
3166 | } | |
dab291af | 3167 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3168 | if (jbd2_journal_flush(journal) < 0) |
3169 | goto out; | |
3170 | ||
32c37730 | 3171 | lock_super(sb); |
617ba13b | 3172 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3173 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3174 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 3175 | sb->s_dirt = 0; |
617ba13b | 3176 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 3177 | } |
32c37730 | 3178 | unlock_super(sb); |
7ffe1ea8 HK |
3179 | |
3180 | out: | |
dab291af | 3181 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3182 | } |
3183 | ||
3184 | /* | |
3185 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3186 | * has recorded an error from a previous lifetime, move that error to the | |
3187 | * main filesystem now. | |
3188 | */ | |
2b2d6d01 TT |
3189 | static void ext4_clear_journal_err(struct super_block *sb, |
3190 | struct ext4_super_block *es) | |
ac27a0ec DK |
3191 | { |
3192 | journal_t *journal; | |
3193 | int j_errno; | |
3194 | const char *errstr; | |
3195 | ||
0390131b FM |
3196 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3197 | ||
617ba13b | 3198 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3199 | |
3200 | /* | |
3201 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3202 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3203 | */ |
3204 | ||
dab291af | 3205 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3206 | if (j_errno) { |
3207 | char nbuf[16]; | |
3208 | ||
617ba13b | 3209 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 3210 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 3211 | "from previous mount: %s", errstr); |
46e665e9 | 3212 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
3213 | "filesystem check."); |
3214 | ||
617ba13b MC |
3215 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3216 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2b2d6d01 | 3217 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 3218 | |
dab291af | 3219 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3220 | } |
3221 | } | |
3222 | ||
3223 | /* | |
3224 | * Force the running and committing transactions to commit, | |
3225 | * and wait on the commit. | |
3226 | */ | |
617ba13b | 3227 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3228 | { |
3229 | journal_t *journal; | |
0390131b | 3230 | int ret = 0; |
ac27a0ec DK |
3231 | |
3232 | if (sb->s_flags & MS_RDONLY) | |
3233 | return 0; | |
3234 | ||
617ba13b | 3235 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
3236 | if (journal) { |
3237 | sb->s_dirt = 0; | |
3238 | ret = ext4_journal_force_commit(journal); | |
3239 | } | |
3240 | ||
ac27a0ec DK |
3241 | return ret; |
3242 | } | |
3243 | ||
3244 | /* | |
617ba13b | 3245 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec | 3246 | * have to propagate any other updates to the superblock on disk at this |
14ce0cb4 TT |
3247 | * point. (We can probably nuke this function altogether, and remove |
3248 | * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) | |
ac27a0ec | 3249 | */ |
2b2d6d01 | 3250 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3251 | { |
0390131b FM |
3252 | if (EXT4_SB(sb)->s_journal) { |
3253 | if (mutex_trylock(&sb->s_lock) != 0) | |
3254 | BUG(); | |
3255 | sb->s_dirt = 0; | |
3256 | } else { | |
3257 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
3258 | } | |
ac27a0ec DK |
3259 | } |
3260 | ||
617ba13b | 3261 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3262 | { |
14ce0cb4 | 3263 | int ret = 0; |
9eddacf9 | 3264 | tid_t target; |
ac27a0ec | 3265 | |
ede86cc4 | 3266 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
ac27a0ec | 3267 | sb->s_dirt = 0; |
0390131b | 3268 | if (EXT4_SB(sb)->s_journal) { |
9eddacf9 JK |
3269 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, |
3270 | &target)) { | |
3271 | if (wait) | |
3272 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, | |
3273 | target); | |
3274 | } | |
0390131b FM |
3275 | } else { |
3276 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); | |
3277 | } | |
14ce0cb4 | 3278 | return ret; |
ac27a0ec DK |
3279 | } |
3280 | ||
3281 | /* | |
3282 | * LVM calls this function before a (read-only) snapshot is created. This | |
3283 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3284 | */ | |
c4be0c1d | 3285 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3286 | { |
c4be0c1d TS |
3287 | int error = 0; |
3288 | journal_t *journal; | |
ac27a0ec DK |
3289 | sb->s_dirt = 0; |
3290 | ||
3291 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 3292 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3293 | |
0390131b FM |
3294 | if (journal) { |
3295 | /* Now we set up the journal barrier. */ | |
3296 | jbd2_journal_lock_updates(journal); | |
7ffe1ea8 | 3297 | |
0390131b FM |
3298 | /* |
3299 | * We don't want to clear needs_recovery flag when we | |
3300 | * failed to flush the journal. | |
3301 | */ | |
c4be0c1d TS |
3302 | error = jbd2_journal_flush(journal); |
3303 | if (error < 0) | |
3304 | goto out; | |
0390131b | 3305 | } |
ac27a0ec DK |
3306 | |
3307 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b | 3308 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
c4be0c1d TS |
3309 | error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); |
3310 | if (error) | |
3311 | goto out; | |
ac27a0ec | 3312 | } |
c4be0c1d TS |
3313 | return 0; |
3314 | out: | |
3315 | jbd2_journal_unlock_updates(journal); | |
3316 | return error; | |
ac27a0ec DK |
3317 | } |
3318 | ||
3319 | /* | |
3320 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3321 | * flag here, even though the filesystem is not technically dirty yet. | |
3322 | */ | |
c4be0c1d | 3323 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3324 | { |
0390131b | 3325 | if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { |
ac27a0ec DK |
3326 | lock_super(sb); |
3327 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
3328 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
3329 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 3330 | unlock_super(sb); |
dab291af | 3331 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec | 3332 | } |
c4be0c1d | 3333 | return 0; |
ac27a0ec DK |
3334 | } |
3335 | ||
2b2d6d01 | 3336 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3337 | { |
2b2d6d01 | 3338 | struct ext4_super_block *es; |
617ba13b MC |
3339 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3340 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3341 | unsigned long old_sb_flags; |
617ba13b | 3342 | struct ext4_mount_options old_opts; |
8a266467 | 3343 | ext4_group_t g; |
b3881f74 | 3344 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3345 | int err; |
3346 | #ifdef CONFIG_QUOTA | |
3347 | int i; | |
3348 | #endif | |
3349 | ||
3350 | /* Store the original options */ | |
3351 | old_sb_flags = sb->s_flags; | |
3352 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3353 | old_opts.s_resuid = sbi->s_resuid; | |
3354 | old_opts.s_resgid = sbi->s_resgid; | |
3355 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3356 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3357 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3358 | #ifdef CONFIG_QUOTA |
3359 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3360 | for (i = 0; i < MAXQUOTAS; i++) | |
3361 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3362 | #endif | |
b3881f74 TT |
3363 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3364 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3365 | |
3366 | /* | |
3367 | * Allow the "check" option to be passed as a remount option. | |
3368 | */ | |
b3881f74 TT |
3369 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3370 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3371 | err = -EINVAL; |
3372 | goto restore_opts; | |
3373 | } | |
3374 | ||
617ba13b | 3375 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 3376 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3377 | |
3378 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3379 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3380 | |
3381 | es = sbi->s_es; | |
3382 | ||
b3881f74 | 3383 | if (sbi->s_journal) { |
0390131b | 3384 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3385 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3386 | } | |
ac27a0ec DK |
3387 | |
3388 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3389 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3390 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3391 | err = -EROFS; |
3392 | goto restore_opts; | |
3393 | } | |
3394 | ||
3395 | if (*flags & MS_RDONLY) { | |
3396 | /* | |
3397 | * First of all, the unconditional stuff we have to do | |
3398 | * to disable replay of the journal when we next remount | |
3399 | */ | |
3400 | sb->s_flags |= MS_RDONLY; | |
3401 | ||
3402 | /* | |
3403 | * OK, test if we are remounting a valid rw partition | |
3404 | * readonly, and if so set the rdonly flag and then | |
3405 | * mark the partition as valid again. | |
3406 | */ | |
617ba13b MC |
3407 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3408 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3409 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3410 | ||
32c37730 JK |
3411 | /* |
3412 | * We have to unlock super so that we can wait for | |
3413 | * transactions. | |
3414 | */ | |
0390131b FM |
3415 | if (sbi->s_journal) { |
3416 | unlock_super(sb); | |
3417 | ext4_mark_recovery_complete(sb, es); | |
3418 | lock_super(sb); | |
3419 | } | |
ac27a0ec | 3420 | } else { |
3a06d778 | 3421 | int ret; |
617ba13b MC |
3422 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3423 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3424 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec | 3425 | "remount RDWR because of unsupported " |
3a06d778 AK |
3426 | "optional features (%x).\n", sb->s_id, |
3427 | (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & | |
3428 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
3429 | err = -EROFS; |
3430 | goto restore_opts; | |
3431 | } | |
ead6596b | 3432 | |
8a266467 TT |
3433 | /* |
3434 | * Make sure the group descriptor checksums | |
3435 | * are sane. If they aren't, refuse to | |
3436 | * remount r/w. | |
3437 | */ | |
3438 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3439 | struct ext4_group_desc *gdp = | |
3440 | ext4_get_group_desc(sb, g, NULL); | |
3441 | ||
3442 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3443 | printk(KERN_ERR | |
3444 | "EXT4-fs: ext4_remount: " | |
a9df9a49 | 3445 | "Checksum for group %u failed (%u!=%u)\n", |
8a266467 TT |
3446 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3447 | le16_to_cpu(gdp->bg_checksum)); | |
3448 | err = -EINVAL; | |
3449 | goto restore_opts; | |
3450 | } | |
3451 | } | |
3452 | ||
ead6596b ES |
3453 | /* |
3454 | * If we have an unprocessed orphan list hanging | |
3455 | * around from a previously readonly bdev mount, | |
3456 | * require a full umount/remount for now. | |
3457 | */ | |
3458 | if (es->s_last_orphan) { | |
3459 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3460 | "remount RDWR because of unprocessed " | |
3461 | "orphan inode list. Please " | |
3462 | "umount/remount instead.\n", | |
3463 | sb->s_id); | |
3464 | err = -EINVAL; | |
3465 | goto restore_opts; | |
3466 | } | |
3467 | ||
ac27a0ec DK |
3468 | /* |
3469 | * Mounting a RDONLY partition read-write, so reread | |
3470 | * and store the current valid flag. (It may have | |
3471 | * been changed by e2fsck since we originally mounted | |
3472 | * the partition.) | |
3473 | */ | |
0390131b FM |
3474 | if (sbi->s_journal) |
3475 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3476 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3477 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3478 | goto restore_opts; |
2b2d6d01 | 3479 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3480 | sb->s_flags &= ~MS_RDONLY; |
3481 | } | |
3482 | } | |
0390131b FM |
3483 | if (sbi->s_journal == NULL) |
3484 | ext4_commit_super(sb, es, 1); | |
3485 | ||
ac27a0ec DK |
3486 | #ifdef CONFIG_QUOTA |
3487 | /* Release old quota file names */ | |
3488 | for (i = 0; i < MAXQUOTAS; i++) | |
3489 | if (old_opts.s_qf_names[i] && | |
3490 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3491 | kfree(old_opts.s_qf_names[i]); | |
3492 | #endif | |
3493 | return 0; | |
3494 | restore_opts: | |
3495 | sb->s_flags = old_sb_flags; | |
3496 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3497 | sbi->s_resuid = old_opts.s_resuid; | |
3498 | sbi->s_resgid = old_opts.s_resgid; | |
3499 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3500 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3501 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3502 | #ifdef CONFIG_QUOTA |
3503 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3504 | for (i = 0; i < MAXQUOTAS; i++) { | |
3505 | if (sbi->s_qf_names[i] && | |
3506 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3507 | kfree(sbi->s_qf_names[i]); | |
3508 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3509 | } | |
3510 | #endif | |
3511 | return err; | |
3512 | } | |
3513 | ||
2b2d6d01 | 3514 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3515 | { |
3516 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3517 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3518 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3519 | u64 fsid; |
ac27a0ec | 3520 | |
5e70030d BP |
3521 | if (test_opt(sb, MINIX_DF)) { |
3522 | sbi->s_overhead_last = 0; | |
6bc9feff | 3523 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
fd2d4291 | 3524 | ext4_group_t ngroups = sbi->s_groups_count, i; |
5e70030d | 3525 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3526 | smp_rmb(); |
3527 | ||
3528 | /* | |
5e70030d BP |
3529 | * Compute the overhead (FS structures). This is constant |
3530 | * for a given filesystem unless the number of block groups | |
3531 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3532 | */ |
3533 | ||
3534 | /* | |
3535 | * All of the blocks before first_data_block are | |
3536 | * overhead | |
3537 | */ | |
3538 | overhead = le32_to_cpu(es->s_first_data_block); | |
3539 | ||
3540 | /* | |
3541 | * Add the overhead attributed to the superblock and | |
3542 | * block group descriptors. If the sparse superblocks | |
3543 | * feature is turned on, then not all groups have this. | |
3544 | */ | |
3545 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3546 | overhead += ext4_bg_has_super(sb, i) + |
3547 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3548 | cond_resched(); |
3549 | } | |
3550 | ||
3551 | /* | |
3552 | * Every block group has an inode bitmap, a block | |
3553 | * bitmap, and an inode table. | |
3554 | */ | |
5e70030d BP |
3555 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3556 | sbi->s_overhead_last = overhead; | |
3557 | smp_wmb(); | |
6bc9feff | 3558 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3559 | } |
3560 | ||
617ba13b | 3561 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3562 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3563 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3564 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3565 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3566 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3567 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3568 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3569 | buf->f_bavail = 0; |
3570 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3571 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3572 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3573 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3574 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3575 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3576 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3577 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3578 | return 0; |
3579 | } | |
3580 | ||
3581 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3582 | * is locked for write. Otherwise the are possible deadlocks: | |
3583 | * Process 1 Process 2 | |
617ba13b | 3584 | * ext4_create() quota_sync() |
a269eb18 JK |
3585 | * jbd2_journal_start() write_dquot() |
3586 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3587 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3588 | * |
3589 | */ | |
3590 | ||
3591 | #ifdef CONFIG_QUOTA | |
3592 | ||
3593 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3594 | { | |
3595 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3596 | } | |
3597 | ||
617ba13b | 3598 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3599 | { |
3600 | int ret, err; | |
3601 | handle_t *handle; | |
3602 | struct inode *inode; | |
3603 | ||
3604 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3605 | handle = ext4_journal_start(inode, |
3606 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3607 | if (IS_ERR(handle)) |
3608 | return PTR_ERR(handle); | |
3609 | ret = dquot_commit(dquot); | |
617ba13b | 3610 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3611 | if (!ret) |
3612 | ret = err; | |
3613 | return ret; | |
3614 | } | |
3615 | ||
617ba13b | 3616 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3617 | { |
3618 | int ret, err; | |
3619 | handle_t *handle; | |
3620 | ||
617ba13b MC |
3621 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3622 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3623 | if (IS_ERR(handle)) |
3624 | return PTR_ERR(handle); | |
3625 | ret = dquot_acquire(dquot); | |
617ba13b | 3626 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3627 | if (!ret) |
3628 | ret = err; | |
3629 | return ret; | |
3630 | } | |
3631 | ||
617ba13b | 3632 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3633 | { |
3634 | int ret, err; | |
3635 | handle_t *handle; | |
3636 | ||
617ba13b MC |
3637 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3638 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3639 | if (IS_ERR(handle)) { |
3640 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3641 | dquot_release(dquot); | |
ac27a0ec | 3642 | return PTR_ERR(handle); |
9c3013e9 | 3643 | } |
ac27a0ec | 3644 | ret = dquot_release(dquot); |
617ba13b | 3645 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3646 | if (!ret) |
3647 | ret = err; | |
3648 | return ret; | |
3649 | } | |
3650 | ||
617ba13b | 3651 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3652 | { |
2c8be6b2 | 3653 | /* Are we journaling quotas? */ |
617ba13b MC |
3654 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3655 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3656 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3657 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3658 | } else { |
3659 | return dquot_mark_dquot_dirty(dquot); | |
3660 | } | |
3661 | } | |
3662 | ||
617ba13b | 3663 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3664 | { |
3665 | int ret, err; | |
3666 | handle_t *handle; | |
3667 | ||
3668 | /* Data block + inode block */ | |
617ba13b | 3669 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3670 | if (IS_ERR(handle)) |
3671 | return PTR_ERR(handle); | |
3672 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3673 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3674 | if (!ret) |
3675 | ret = err; | |
3676 | return ret; | |
3677 | } | |
3678 | ||
3679 | /* | |
3680 | * Turn on quotas during mount time - we need to find | |
3681 | * the quota file and such... | |
3682 | */ | |
617ba13b | 3683 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3684 | { |
617ba13b MC |
3685 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3686 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3687 | } |
3688 | ||
3689 | /* | |
3690 | * Standard function to be called on quota_on | |
3691 | */ | |
617ba13b | 3692 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3693 | char *name, int remount) |
ac27a0ec DK |
3694 | { |
3695 | int err; | |
8264613d | 3696 | struct path path; |
ac27a0ec DK |
3697 | |
3698 | if (!test_opt(sb, QUOTA)) | |
3699 | return -EINVAL; | |
8264613d | 3700 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3701 | if (remount) |
8264613d | 3702 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3703 | |
8264613d | 3704 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3705 | if (err) |
3706 | return err; | |
0623543b | 3707 | |
ac27a0ec | 3708 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3709 | if (path.mnt->mnt_sb != sb) { |
3710 | path_put(&path); | |
ac27a0ec DK |
3711 | return -EXDEV; |
3712 | } | |
0623543b JK |
3713 | /* Journaling quota? */ |
3714 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3715 | /* Quotafile not in fs root? */ |
8264613d | 3716 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3717 | printk(KERN_WARNING |
3718 | "EXT4-fs: Quota file not on filesystem root. " | |
3719 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3720 | } |
0623543b JK |
3721 | |
3722 | /* | |
3723 | * When we journal data on quota file, we have to flush journal to see | |
3724 | * all updates to the file when we bypass pagecache... | |
3725 | */ | |
0390131b FM |
3726 | if (EXT4_SB(sb)->s_journal && |
3727 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3728 | /* |
3729 | * We don't need to lock updates but journal_flush() could | |
3730 | * otherwise be livelocked... | |
3731 | */ | |
3732 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3733 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3734 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3735 | if (err) { |
8264613d | 3736 | path_put(&path); |
7ffe1ea8 HK |
3737 | return err; |
3738 | } | |
0623543b JK |
3739 | } |
3740 | ||
8264613d AV |
3741 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3742 | path_put(&path); | |
77e69dac | 3743 | return err; |
ac27a0ec DK |
3744 | } |
3745 | ||
3746 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3747 | * acquiring the locks... As quota files are never truncated and quota code | |
3748 | * itself serializes the operations (and noone else should touch the files) | |
3749 | * we don't have to be afraid of races */ | |
617ba13b | 3750 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3751 | size_t len, loff_t off) |
3752 | { | |
3753 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3754 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3755 | int err = 0; |
3756 | int offset = off & (sb->s_blocksize - 1); | |
3757 | int tocopy; | |
3758 | size_t toread; | |
3759 | struct buffer_head *bh; | |
3760 | loff_t i_size = i_size_read(inode); | |
3761 | ||
3762 | if (off > i_size) | |
3763 | return 0; | |
3764 | if (off+len > i_size) | |
3765 | len = i_size-off; | |
3766 | toread = len; | |
3767 | while (toread > 0) { | |
3768 | tocopy = sb->s_blocksize - offset < toread ? | |
3769 | sb->s_blocksize - offset : toread; | |
617ba13b | 3770 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3771 | if (err) |
3772 | return err; | |
3773 | if (!bh) /* A hole? */ | |
3774 | memset(data, 0, tocopy); | |
3775 | else | |
3776 | memcpy(data, bh->b_data+offset, tocopy); | |
3777 | brelse(bh); | |
3778 | offset = 0; | |
3779 | toread -= tocopy; | |
3780 | data += tocopy; | |
3781 | blk++; | |
3782 | } | |
3783 | return len; | |
3784 | } | |
3785 | ||
3786 | /* Write to quotafile (we know the transaction is already started and has | |
3787 | * enough credits) */ | |
617ba13b | 3788 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3789 | const char *data, size_t len, loff_t off) |
3790 | { | |
3791 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3792 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3793 | int err = 0; |
3794 | int offset = off & (sb->s_blocksize - 1); | |
3795 | int tocopy; | |
617ba13b | 3796 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3797 | size_t towrite = len; |
3798 | struct buffer_head *bh; | |
3799 | handle_t *handle = journal_current_handle(); | |
3800 | ||
0390131b | 3801 | if (EXT4_SB(sb)->s_journal && !handle) { |
e5f8eab8 | 3802 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3803 | " cancelled because transaction is not started.\n", |
3804 | (unsigned long long)off, (unsigned long long)len); | |
3805 | return -EIO; | |
3806 | } | |
ac27a0ec DK |
3807 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3808 | while (towrite > 0) { | |
3809 | tocopy = sb->s_blocksize - offset < towrite ? | |
3810 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3811 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3812 | if (!bh) |
3813 | goto out; | |
3814 | if (journal_quota) { | |
617ba13b | 3815 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3816 | if (err) { |
3817 | brelse(bh); | |
3818 | goto out; | |
3819 | } | |
3820 | } | |
3821 | lock_buffer(bh); | |
3822 | memcpy(bh->b_data+offset, data, tocopy); | |
3823 | flush_dcache_page(bh->b_page); | |
3824 | unlock_buffer(bh); | |
3825 | if (journal_quota) | |
0390131b | 3826 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3827 | else { |
3828 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3829 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3830 | mark_buffer_dirty(bh); |
3831 | } | |
3832 | brelse(bh); | |
3833 | if (err) | |
3834 | goto out; | |
3835 | offset = 0; | |
3836 | towrite -= tocopy; | |
3837 | data += tocopy; | |
3838 | blk++; | |
3839 | } | |
3840 | out: | |
4d04e4fb JK |
3841 | if (len == towrite) { |
3842 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3843 | return err; |
4d04e4fb | 3844 | } |
ac27a0ec DK |
3845 | if (inode->i_size < off+len-towrite) { |
3846 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3847 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3848 | } |
ac27a0ec | 3849 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3850 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3851 | mutex_unlock(&inode->i_mutex); |
3852 | return len - towrite; | |
3853 | } | |
3854 | ||
3855 | #endif | |
3856 | ||
617ba13b | 3857 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3858 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3859 | { | |
617ba13b | 3860 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3861 | } |
3862 | ||
03010a33 TT |
3863 | static struct file_system_type ext4_fs_type = { |
3864 | .owner = THIS_MODULE, | |
3865 | .name = "ext4", | |
3866 | .get_sb = ext4_get_sb, | |
3867 | .kill_sb = kill_block_super, | |
3868 | .fs_flags = FS_REQUIRES_DEV, | |
3869 | }; | |
3870 | ||
3871 | #ifdef CONFIG_EXT4DEV_COMPAT | |
3872 | static int ext4dev_get_sb(struct file_system_type *fs_type, | |
3873 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
3874 | { | |
3875 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3876 | "to mount using ext4\n"); | |
3877 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3878 | "will go away by 2.6.31\n"); | |
3879 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); | |
3880 | } | |
3881 | ||
617ba13b | 3882 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3883 | .owner = THIS_MODULE, |
617ba13b | 3884 | .name = "ext4dev", |
03010a33 | 3885 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3886 | .kill_sb = kill_block_super, |
3887 | .fs_flags = FS_REQUIRES_DEV, | |
3888 | }; | |
03010a33 TT |
3889 | MODULE_ALIAS("ext4dev"); |
3890 | #endif | |
ac27a0ec | 3891 | |
617ba13b | 3892 | static int __init init_ext4_fs(void) |
ac27a0ec | 3893 | { |
c9de560d AT |
3894 | int err; |
3895 | ||
3197ebdb TT |
3896 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
3897 | if (!ext4_kset) | |
3898 | return -ENOMEM; | |
9f6200bb | 3899 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3900 | err = init_ext4_mballoc(); |
ac27a0ec DK |
3901 | if (err) |
3902 | return err; | |
c9de560d AT |
3903 | |
3904 | err = init_ext4_xattr(); | |
3905 | if (err) | |
3906 | goto out2; | |
ac27a0ec DK |
3907 | err = init_inodecache(); |
3908 | if (err) | |
3909 | goto out1; | |
03010a33 | 3910 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3911 | if (err) |
3912 | goto out; | |
03010a33 TT |
3913 | #ifdef CONFIG_EXT4DEV_COMPAT |
3914 | err = register_filesystem(&ext4dev_fs_type); | |
3915 | if (err) { | |
3916 | unregister_filesystem(&ext4_fs_type); | |
3917 | goto out; | |
3918 | } | |
3919 | #endif | |
ac27a0ec DK |
3920 | return 0; |
3921 | out: | |
3922 | destroy_inodecache(); | |
3923 | out1: | |
617ba13b | 3924 | exit_ext4_xattr(); |
c9de560d AT |
3925 | out2: |
3926 | exit_ext4_mballoc(); | |
ac27a0ec DK |
3927 | return err; |
3928 | } | |
3929 | ||
617ba13b | 3930 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3931 | { |
03010a33 TT |
3932 | unregister_filesystem(&ext4_fs_type); |
3933 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 3934 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 3935 | #endif |
ac27a0ec | 3936 | destroy_inodecache(); |
617ba13b | 3937 | exit_ext4_xattr(); |
c9de560d | 3938 | exit_ext4_mballoc(); |
9f6200bb | 3939 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 3940 | kset_unregister(ext4_kset); |
ac27a0ec DK |
3941 | } |
3942 | ||
3943 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 3944 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 3945 | MODULE_LICENSE("GPL"); |
617ba13b MC |
3946 | module_init(init_ext4_fs) |
3947 | module_exit(exit_ext4_fs) |