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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/buffer_head.h> | |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
9f6200bb | 38 | #include <linux/proc_fs.h> |
3197ebdb | 39 | #include <linux/ctype.h> |
ede86cc4 | 40 | #include <linux/marker.h> |
1330593e | 41 | #include <linux/log2.h> |
717d50e4 | 42 | #include <linux/crc16.h> |
ac27a0ec DK |
43 | #include <asm/uaccess.h> |
44 | ||
3dcf5451 CH |
45 | #include "ext4.h" |
46 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
47 | #include "xattr.h" |
48 | #include "acl.h" | |
ac27a0ec | 49 | |
f4033903 CW |
50 | static int default_mb_history_length = 1000; |
51 | ||
52 | module_param_named(default_mb_history_length, default_mb_history_length, | |
53 | int, 0644); | |
54 | MODULE_PARM_DESC(default_mb_history_length, | |
55 | "Default number of entries saved for mb_history"); | |
56 | ||
9f6200bb | 57 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 58 | static struct kset *ext4_kset; |
9f6200bb | 59 | |
617ba13b | 60 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 61 | unsigned long journal_devnum); |
e2d67052 | 62 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
63 | static void ext4_mark_recovery_complete(struct super_block *sb, |
64 | struct ext4_super_block *es); | |
65 | static void ext4_clear_journal_err(struct super_block *sb, | |
66 | struct ext4_super_block *es); | |
617ba13b | 67 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 68 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 69 | char nbuf[16]); |
2b2d6d01 TT |
70 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
71 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 72 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 73 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 74 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 75 | |
bd81d8ee | 76 | |
8fadc143 AR |
77 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
78 | struct ext4_group_desc *bg) | |
bd81d8ee | 79 | { |
3a14589c | 80 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 81 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 82 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
83 | } |
84 | ||
8fadc143 AR |
85 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
86 | struct ext4_group_desc *bg) | |
bd81d8ee | 87 | { |
5272f837 | 88 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 89 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 90 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
91 | } |
92 | ||
8fadc143 AR |
93 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
94 | struct ext4_group_desc *bg) | |
bd81d8ee | 95 | { |
5272f837 | 96 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 97 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 98 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
99 | } |
100 | ||
560671a0 AK |
101 | __u32 ext4_free_blks_count(struct super_block *sb, |
102 | struct ext4_group_desc *bg) | |
103 | { | |
104 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
105 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
106 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); | |
107 | } | |
108 | ||
109 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
110 | struct ext4_group_desc *bg) | |
111 | { | |
112 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
113 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
114 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); | |
115 | } | |
116 | ||
117 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
118 | struct ext4_group_desc *bg) | |
119 | { | |
120 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
121 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
122 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); | |
123 | } | |
124 | ||
125 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
126 | struct ext4_group_desc *bg) | |
127 | { | |
128 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
129 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
130 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); | |
131 | } | |
132 | ||
8fadc143 AR |
133 | void ext4_block_bitmap_set(struct super_block *sb, |
134 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 135 | { |
3a14589c | 136 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
137 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
138 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
139 | } |
140 | ||
8fadc143 AR |
141 | void ext4_inode_bitmap_set(struct super_block *sb, |
142 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 143 | { |
5272f837 | 144 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
145 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
146 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
147 | } |
148 | ||
8fadc143 AR |
149 | void ext4_inode_table_set(struct super_block *sb, |
150 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 151 | { |
5272f837 | 152 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
153 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
154 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
155 | } |
156 | ||
560671a0 AK |
157 | void ext4_free_blks_set(struct super_block *sb, |
158 | struct ext4_group_desc *bg, __u32 count) | |
159 | { | |
160 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
161 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
162 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
163 | } | |
164 | ||
165 | void ext4_free_inodes_set(struct super_block *sb, | |
166 | struct ext4_group_desc *bg, __u32 count) | |
167 | { | |
168 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
169 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
170 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
171 | } | |
172 | ||
173 | void ext4_used_dirs_set(struct super_block *sb, | |
174 | struct ext4_group_desc *bg, __u32 count) | |
175 | { | |
176 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
177 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
178 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
179 | } | |
180 | ||
181 | void ext4_itable_unused_set(struct super_block *sb, | |
182 | struct ext4_group_desc *bg, __u32 count) | |
183 | { | |
184 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
185 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
186 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
187 | } | |
188 | ||
ac27a0ec | 189 | /* |
dab291af | 190 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
191 | * |
192 | * The only special thing we need to do here is to make sure that all | |
193 | * journal_end calls result in the superblock being marked dirty, so | |
194 | * that sync() will call the filesystem's write_super callback if | |
195 | * appropriate. | |
196 | */ | |
617ba13b | 197 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
198 | { |
199 | journal_t *journal; | |
200 | ||
201 | if (sb->s_flags & MS_RDONLY) | |
202 | return ERR_PTR(-EROFS); | |
203 | ||
204 | /* Special case here: if the journal has aborted behind our | |
205 | * backs (eg. EIO in the commit thread), then we still need to | |
206 | * take the FS itself readonly cleanly. */ | |
617ba13b | 207 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
208 | if (journal) { |
209 | if (is_journal_aborted(journal)) { | |
210 | ext4_abort(sb, __func__, | |
211 | "Detected aborted journal"); | |
212 | return ERR_PTR(-EROFS); | |
213 | } | |
214 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 215 | } |
0390131b FM |
216 | /* |
217 | * We're not journaling, return the appropriate indication. | |
218 | */ | |
219 | current->journal_info = EXT4_NOJOURNAL_HANDLE; | |
220 | return current->journal_info; | |
ac27a0ec DK |
221 | } |
222 | ||
223 | /* | |
224 | * The only special thing we need to do here is to make sure that all | |
dab291af | 225 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
226 | * that sync() will call the filesystem's write_super callback if |
227 | * appropriate. | |
228 | */ | |
617ba13b | 229 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
230 | { |
231 | struct super_block *sb; | |
232 | int err; | |
233 | int rc; | |
234 | ||
0390131b FM |
235 | if (!ext4_handle_valid(handle)) { |
236 | /* | |
237 | * Do this here since we don't call jbd2_journal_stop() in | |
238 | * no-journal mode. | |
239 | */ | |
240 | current->journal_info = NULL; | |
241 | return 0; | |
242 | } | |
ac27a0ec DK |
243 | sb = handle->h_transaction->t_journal->j_private; |
244 | err = handle->h_err; | |
dab291af | 245 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
246 | |
247 | if (!err) | |
248 | err = rc; | |
249 | if (err) | |
617ba13b | 250 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
251 | return err; |
252 | } | |
253 | ||
617ba13b | 254 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
255 | struct buffer_head *bh, handle_t *handle, int err) |
256 | { | |
257 | char nbuf[16]; | |
617ba13b | 258 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 259 | |
0390131b FM |
260 | BUG_ON(!ext4_handle_valid(handle)); |
261 | ||
ac27a0ec DK |
262 | if (bh) |
263 | BUFFER_TRACE(bh, "abort"); | |
264 | ||
265 | if (!handle->h_err) | |
266 | handle->h_err = err; | |
267 | ||
268 | if (is_handle_aborted(handle)) | |
269 | return; | |
270 | ||
271 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
272 | caller, errstr, err_fn); | |
273 | ||
dab291af | 274 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
275 | } |
276 | ||
277 | /* Deal with the reporting of failure conditions on a filesystem such as | |
278 | * inconsistencies detected or read IO failures. | |
279 | * | |
280 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 281 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
282 | * write ordering constraints on the superblock which prevent us from |
283 | * writing it out straight away; and given that the journal is about to | |
284 | * be aborted, we can't rely on the current, or future, transactions to | |
285 | * write out the superblock safely. | |
286 | * | |
dab291af | 287 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
288 | * the journal instead. On recovery, the journal will compain about |
289 | * that error until we've noted it down and cleared it. | |
290 | */ | |
291 | ||
617ba13b | 292 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 293 | { |
617ba13b | 294 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 295 | |
617ba13b MC |
296 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
297 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
298 | |
299 | if (sb->s_flags & MS_RDONLY) | |
300 | return; | |
301 | ||
2b2d6d01 | 302 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 303 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 304 | |
617ba13b | 305 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 306 | if (journal) |
dab291af | 307 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 308 | } |
2b2d6d01 TT |
309 | if (test_opt(sb, ERRORS_RO)) { |
310 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
311 | sb->s_flags |= MS_RDONLY; |
312 | } | |
e2d67052 | 313 | ext4_commit_super(sb, 1); |
ac27a0ec | 314 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 315 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
316 | sb->s_id); |
317 | } | |
318 | ||
2b2d6d01 TT |
319 | void ext4_error(struct super_block *sb, const char *function, |
320 | const char *fmt, ...) | |
ac27a0ec DK |
321 | { |
322 | va_list args; | |
323 | ||
324 | va_start(args, fmt); | |
2b2d6d01 | 325 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
326 | vprintk(fmt, args); |
327 | printk("\n"); | |
328 | va_end(args); | |
329 | ||
617ba13b | 330 | ext4_handle_error(sb); |
ac27a0ec DK |
331 | } |
332 | ||
2b2d6d01 | 333 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
334 | char nbuf[16]) |
335 | { | |
336 | char *errstr = NULL; | |
337 | ||
338 | switch (errno) { | |
339 | case -EIO: | |
340 | errstr = "IO failure"; | |
341 | break; | |
342 | case -ENOMEM: | |
343 | errstr = "Out of memory"; | |
344 | break; | |
345 | case -EROFS: | |
dab291af | 346 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
347 | errstr = "Journal has aborted"; |
348 | else | |
349 | errstr = "Readonly filesystem"; | |
350 | break; | |
351 | default: | |
352 | /* If the caller passed in an extra buffer for unknown | |
353 | * errors, textualise them now. Else we just return | |
354 | * NULL. */ | |
355 | if (nbuf) { | |
356 | /* Check for truncated error codes... */ | |
357 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
358 | errstr = nbuf; | |
359 | } | |
360 | break; | |
361 | } | |
362 | ||
363 | return errstr; | |
364 | } | |
365 | ||
617ba13b | 366 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
367 | * automatically and invokes the appropriate error response. */ |
368 | ||
2b2d6d01 | 369 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
370 | { |
371 | char nbuf[16]; | |
372 | const char *errstr; | |
373 | ||
374 | /* Special case: if the error is EROFS, and we're not already | |
375 | * inside a transaction, then there's really no point in logging | |
376 | * an error. */ | |
377 | if (errno == -EROFS && journal_current_handle() == NULL && | |
378 | (sb->s_flags & MS_RDONLY)) | |
379 | return; | |
380 | ||
617ba13b | 381 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
382 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
383 | sb->s_id, function, errstr); | |
ac27a0ec | 384 | |
617ba13b | 385 | ext4_handle_error(sb); |
ac27a0ec DK |
386 | } |
387 | ||
388 | /* | |
617ba13b | 389 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
390 | * abort function may be used to deal with unrecoverable failures such |
391 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
392 | * | |
393 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
394 | * unless the error response on the fs has been set to panic in which | |
395 | * case we take the easy way out and panic immediately. | |
396 | */ | |
397 | ||
2b2d6d01 TT |
398 | void ext4_abort(struct super_block *sb, const char *function, |
399 | const char *fmt, ...) | |
ac27a0ec DK |
400 | { |
401 | va_list args; | |
402 | ||
2b2d6d01 | 403 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
404 | |
405 | va_start(args, fmt); | |
2b2d6d01 | 406 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
407 | vprintk(fmt, args); |
408 | printk("\n"); | |
409 | va_end(args); | |
410 | ||
411 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 412 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
413 | |
414 | if (sb->s_flags & MS_RDONLY) | |
415 | return; | |
416 | ||
417 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 418 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 419 | sb->s_flags |= MS_RDONLY; |
617ba13b | 420 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
421 | if (EXT4_SB(sb)->s_journal) |
422 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
423 | } |
424 | ||
2b2d6d01 TT |
425 | void ext4_warning(struct super_block *sb, const char *function, |
426 | const char *fmt, ...) | |
ac27a0ec DK |
427 | { |
428 | va_list args; | |
429 | ||
430 | va_start(args, fmt); | |
617ba13b | 431 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
432 | sb->s_id, function); |
433 | vprintk(fmt, args); | |
434 | printk("\n"); | |
435 | va_end(args); | |
436 | } | |
437 | ||
5d1b1b3f AK |
438 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
439 | const char *function, const char *fmt, ...) | |
440 | __releases(bitlock) | |
441 | __acquires(bitlock) | |
442 | { | |
443 | va_list args; | |
444 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
445 | ||
446 | va_start(args, fmt); | |
447 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
448 | vprintk(fmt, args); | |
449 | printk("\n"); | |
450 | va_end(args); | |
451 | ||
452 | if (test_opt(sb, ERRORS_CONT)) { | |
453 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
454 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 455 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
456 | return; |
457 | } | |
458 | ext4_unlock_group(sb, grp); | |
459 | ext4_handle_error(sb); | |
460 | /* | |
461 | * We only get here in the ERRORS_RO case; relocking the group | |
462 | * may be dangerous, but nothing bad will happen since the | |
463 | * filesystem will have already been marked read/only and the | |
464 | * journal has been aborted. We return 1 as a hint to callers | |
465 | * who might what to use the return value from | |
466 | * ext4_grp_locked_error() to distinguish beween the | |
467 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
468 | * aggressively from the ext4 function in question, with a | |
469 | * more appropriate error code. | |
470 | */ | |
471 | ext4_lock_group(sb, grp); | |
472 | return; | |
473 | } | |
474 | ||
475 | ||
617ba13b | 476 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 477 | { |
617ba13b | 478 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 479 | |
617ba13b | 480 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
481 | return; |
482 | ||
46e665e9 | 483 | ext4_warning(sb, __func__, |
ac27a0ec DK |
484 | "updating to rev %d because of new feature flag, " |
485 | "running e2fsck is recommended", | |
617ba13b | 486 | EXT4_DYNAMIC_REV); |
ac27a0ec | 487 | |
617ba13b MC |
488 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
489 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
490 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
491 | /* leave es->s_feature_*compat flags alone */ |
492 | /* es->s_uuid will be set by e2fsck if empty */ | |
493 | ||
494 | /* | |
495 | * The rest of the superblock fields should be zero, and if not it | |
496 | * means they are likely already in use, so leave them alone. We | |
497 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
498 | */ | |
499 | } | |
500 | ||
501 | /* | |
502 | * Open the external journal device | |
503 | */ | |
617ba13b | 504 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
505 | { |
506 | struct block_device *bdev; | |
507 | char b[BDEVNAME_SIZE]; | |
508 | ||
509 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
510 | if (IS_ERR(bdev)) | |
511 | goto fail; | |
512 | return bdev; | |
513 | ||
514 | fail: | |
abda1418 | 515 | printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
516 | __bdevname(dev, b), PTR_ERR(bdev)); |
517 | return NULL; | |
518 | } | |
519 | ||
520 | /* | |
521 | * Release the journal device | |
522 | */ | |
617ba13b | 523 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
524 | { |
525 | bd_release(bdev); | |
9a1c3542 | 526 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
527 | } |
528 | ||
617ba13b | 529 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
530 | { |
531 | struct block_device *bdev; | |
532 | int ret = -ENODEV; | |
533 | ||
534 | bdev = sbi->journal_bdev; | |
535 | if (bdev) { | |
617ba13b | 536 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
537 | sbi->journal_bdev = NULL; |
538 | } | |
539 | return ret; | |
540 | } | |
541 | ||
542 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
543 | { | |
617ba13b | 544 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
545 | } |
546 | ||
617ba13b | 547 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
548 | { |
549 | struct list_head *l; | |
550 | ||
551 | printk(KERN_ERR "sb orphan head is %d\n", | |
552 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
553 | ||
554 | printk(KERN_ERR "sb_info orphan list:\n"); | |
555 | list_for_each(l, &sbi->s_orphan) { | |
556 | struct inode *inode = orphan_list_entry(l); | |
557 | printk(KERN_ERR " " | |
558 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
559 | inode->i_sb->s_id, inode->i_ino, inode, | |
560 | inode->i_mode, inode->i_nlink, | |
561 | NEXT_ORPHAN(inode)); | |
562 | } | |
563 | } | |
564 | ||
2b2d6d01 | 565 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 566 | { |
617ba13b MC |
567 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
568 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 569 | int i, err; |
ac27a0ec | 570 | |
6fd058f7 | 571 | ext4_release_system_zone(sb); |
c9de560d | 572 | ext4_mb_release(sb); |
a86c6181 | 573 | ext4_ext_release(sb); |
617ba13b | 574 | ext4_xattr_put_super(sb); |
0390131b FM |
575 | if (sbi->s_journal) { |
576 | err = jbd2_journal_destroy(sbi->s_journal); | |
577 | sbi->s_journal = NULL; | |
578 | if (err < 0) | |
579 | ext4_abort(sb, __func__, | |
580 | "Couldn't clean up the journal"); | |
581 | } | |
ac27a0ec | 582 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 583 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 584 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 585 | ext4_commit_super(sb, 1); |
ac27a0ec | 586 | } |
240799cd | 587 | if (sbi->s_proc) { |
9f6200bb | 588 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 589 | } |
3197ebdb | 590 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
591 | |
592 | for (i = 0; i < sbi->s_gdb_count; i++) | |
593 | brelse(sbi->s_group_desc[i]); | |
594 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
595 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
596 | vfree(sbi->s_flex_groups); | |
597 | else | |
598 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
599 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
600 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
601 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 602 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
603 | brelse(sbi->s_sbh); |
604 | #ifdef CONFIG_QUOTA | |
605 | for (i = 0; i < MAXQUOTAS; i++) | |
606 | kfree(sbi->s_qf_names[i]); | |
607 | #endif | |
608 | ||
609 | /* Debugging code just in case the in-memory inode orphan list | |
610 | * isn't empty. The on-disk one can be non-empty if we've | |
611 | * detected an error and taken the fs readonly, but the | |
612 | * in-memory list had better be clean by this point. */ | |
613 | if (!list_empty(&sbi->s_orphan)) | |
614 | dump_orphan_list(sb, sbi); | |
615 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
616 | ||
f98393a6 | 617 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
618 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
619 | /* | |
620 | * Invalidate the journal device's buffers. We don't want them | |
621 | * floating about in memory - the physical journal device may | |
622 | * hotswapped, and it breaks the `ro-after' testing code. | |
623 | */ | |
624 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 625 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 626 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
627 | } |
628 | sb->s_fs_info = NULL; | |
3197ebdb TT |
629 | /* |
630 | * Now that we are completely done shutting down the | |
631 | * superblock, we need to actually destroy the kobject. | |
632 | */ | |
633 | unlock_kernel(); | |
634 | unlock_super(sb); | |
635 | kobject_put(&sbi->s_kobj); | |
636 | wait_for_completion(&sbi->s_kobj_unregister); | |
637 | lock_super(sb); | |
638 | lock_kernel(); | |
705895b6 | 639 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
640 | kfree(sbi); |
641 | return; | |
642 | } | |
643 | ||
e18b890b | 644 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
645 | |
646 | /* | |
647 | * Called inside transaction, so use GFP_NOFS | |
648 | */ | |
617ba13b | 649 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 650 | { |
617ba13b | 651 | struct ext4_inode_info *ei; |
ac27a0ec | 652 | |
e6b4f8da | 653 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
654 | if (!ei) |
655 | return NULL; | |
03010a33 | 656 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
657 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
658 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 659 | #endif |
ac27a0ec | 660 | ei->vfs_inode.i_version = 1; |
91246c00 | 661 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 662 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
663 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
664 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
665 | /* |
666 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
667 | * therefore it can be null here. Don't check it, just initialize | |
668 | * jinode. | |
669 | */ | |
678aaf48 | 670 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
671 | ei->i_reserved_data_blocks = 0; |
672 | ei->i_reserved_meta_blocks = 0; | |
673 | ei->i_allocated_meta_blocks = 0; | |
674 | ei->i_delalloc_reserved_flag = 0; | |
675 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
ac27a0ec DK |
676 | return &ei->vfs_inode; |
677 | } | |
678 | ||
617ba13b | 679 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 680 | { |
9f7dd93d VA |
681 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
682 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
683 | EXT4_I(inode)); | |
684 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
685 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
686 | true); | |
687 | dump_stack(); | |
688 | } | |
617ba13b | 689 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
690 | } |
691 | ||
51cc5068 | 692 | static void init_once(void *foo) |
ac27a0ec | 693 | { |
617ba13b | 694 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 695 | |
a35afb83 | 696 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 697 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 698 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 699 | #endif |
0e855ac8 | 700 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 701 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
702 | } |
703 | ||
704 | static int init_inodecache(void) | |
705 | { | |
617ba13b MC |
706 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
707 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
708 | 0, (SLAB_RECLAIM_ACCOUNT| |
709 | SLAB_MEM_SPREAD), | |
20c2df83 | 710 | init_once); |
617ba13b | 711 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
712 | return -ENOMEM; |
713 | return 0; | |
714 | } | |
715 | ||
716 | static void destroy_inodecache(void) | |
717 | { | |
617ba13b | 718 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
719 | } |
720 | ||
617ba13b | 721 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 722 | { |
03010a33 | 723 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
724 | if (EXT4_I(inode)->i_acl && |
725 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
726 | posix_acl_release(EXT4_I(inode)->i_acl); | |
727 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
728 | } | |
729 | if (EXT4_I(inode)->i_default_acl && | |
730 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
731 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
732 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
733 | } |
734 | #endif | |
c2ea3fde | 735 | ext4_discard_preallocations(inode); |
0390131b FM |
736 | if (EXT4_JOURNAL(inode)) |
737 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 738 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
739 | } |
740 | ||
2b2d6d01 TT |
741 | static inline void ext4_show_quota_options(struct seq_file *seq, |
742 | struct super_block *sb) | |
ac27a0ec DK |
743 | { |
744 | #if defined(CONFIG_QUOTA) | |
617ba13b | 745 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
746 | |
747 | if (sbi->s_jquota_fmt) | |
748 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 749 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
750 | |
751 | if (sbi->s_qf_names[USRQUOTA]) | |
752 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
753 | ||
754 | if (sbi->s_qf_names[GRPQUOTA]) | |
755 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
756 | ||
617ba13b | 757 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
758 | seq_puts(seq, ",usrquota"); |
759 | ||
617ba13b | 760 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
761 | seq_puts(seq, ",grpquota"); |
762 | #endif | |
763 | } | |
764 | ||
d9c9bef1 MS |
765 | /* |
766 | * Show an option if | |
767 | * - it's set to a non-default value OR | |
768 | * - if the per-sb default is different from the global default | |
769 | */ | |
617ba13b | 770 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 771 | { |
aa22df2c AK |
772 | int def_errors; |
773 | unsigned long def_mount_opts; | |
ac27a0ec | 774 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
775 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
776 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
777 | |
778 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 779 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
780 | |
781 | if (sbi->s_sb_block != 1) | |
782 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
783 | if (test_opt(sb, MINIX_DF)) | |
784 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 785 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
786 | seq_puts(seq, ",grpid"); |
787 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
788 | seq_puts(seq, ",nogrpid"); | |
789 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
790 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
791 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
792 | } | |
793 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
794 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
795 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
796 | } | |
bb4f397a | 797 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 798 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
799 | def_errors == EXT4_ERRORS_CONTINUE) { |
800 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
801 | } |
802 | } | |
aa22df2c | 803 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 804 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 805 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 806 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 807 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 808 | seq_puts(seq, ",nouid32"); |
aa22df2c | 809 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
810 | seq_puts(seq, ",debug"); |
811 | if (test_opt(sb, OLDALLOC)) | |
812 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 813 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
814 | if (test_opt(sb, XATTR_USER) && |
815 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
816 | seq_puts(seq, ",user_xattr"); |
817 | if (!test_opt(sb, XATTR_USER) && | |
818 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
819 | seq_puts(seq, ",nouser_xattr"); | |
820 | } | |
821 | #endif | |
03010a33 | 822 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 823 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
824 | seq_puts(seq, ",acl"); |
825 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
826 | seq_puts(seq, ",noacl"); | |
827 | #endif | |
30773840 | 828 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
829 | seq_printf(seq, ",commit=%u", |
830 | (unsigned) (sbi->s_commit_interval / HZ)); | |
831 | } | |
30773840 TT |
832 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
833 | seq_printf(seq, ",min_batch_time=%u", | |
834 | (unsigned) sbi->s_min_batch_time); | |
835 | } | |
836 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
837 | seq_printf(seq, ",max_batch_time=%u", | |
838 | (unsigned) sbi->s_min_batch_time); | |
839 | } | |
840 | ||
571640ca ES |
841 | /* |
842 | * We're changing the default of barrier mount option, so | |
843 | * let's always display its mount state so it's clear what its | |
844 | * status is. | |
845 | */ | |
846 | seq_puts(seq, ",barrier="); | |
847 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
848 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
849 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
850 | if (test_opt(sb, NOBH)) |
851 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
852 | if (test_opt(sb, I_VERSION)) |
853 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
854 | if (!test_opt(sb, DELALLOC)) |
855 | seq_puts(seq, ",nodelalloc"); | |
856 | ||
ac27a0ec | 857 | |
cb45bbe4 MS |
858 | if (sbi->s_stripe) |
859 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
860 | /* |
861 | * journal mode get enabled in different ways | |
862 | * So just print the value even if we didn't specify it | |
863 | */ | |
617ba13b | 864 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 865 | seq_puts(seq, ",data=journal"); |
617ba13b | 866 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 867 | seq_puts(seq, ",data=ordered"); |
617ba13b | 868 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
869 | seq_puts(seq, ",data=writeback"); |
870 | ||
240799cd TT |
871 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
872 | seq_printf(seq, ",inode_readahead_blks=%u", | |
873 | sbi->s_inode_readahead_blks); | |
874 | ||
5bf5683a HK |
875 | if (test_opt(sb, DATA_ERR_ABORT)) |
876 | seq_puts(seq, ",data_err=abort"); | |
877 | ||
afd4672d | 878 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 879 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 880 | |
617ba13b | 881 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
882 | return 0; |
883 | } | |
884 | ||
885 | ||
1b961ac0 CH |
886 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
887 | u64 ino, u32 generation) | |
ac27a0ec | 888 | { |
ac27a0ec | 889 | struct inode *inode; |
ac27a0ec | 890 | |
617ba13b | 891 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 892 | return ERR_PTR(-ESTALE); |
617ba13b | 893 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
894 | return ERR_PTR(-ESTALE); |
895 | ||
896 | /* iget isn't really right if the inode is currently unallocated!! | |
897 | * | |
617ba13b | 898 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
899 | * deleted, so we should be safe. |
900 | * | |
901 | * Currently we don't know the generation for parent directory, so | |
902 | * a generation of 0 means "accept any" | |
903 | */ | |
1d1fe1ee DH |
904 | inode = ext4_iget(sb, ino); |
905 | if (IS_ERR(inode)) | |
906 | return ERR_CAST(inode); | |
907 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
908 | iput(inode); |
909 | return ERR_PTR(-ESTALE); | |
910 | } | |
1b961ac0 CH |
911 | |
912 | return inode; | |
913 | } | |
914 | ||
915 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
916 | int fh_len, int fh_type) | |
917 | { | |
918 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
919 | ext4_nfs_get_inode); | |
920 | } | |
921 | ||
922 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
923 | int fh_len, int fh_type) | |
924 | { | |
925 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
926 | ext4_nfs_get_inode); | |
ac27a0ec DK |
927 | } |
928 | ||
c39a7f84 TO |
929 | /* |
930 | * Try to release metadata pages (indirect blocks, directories) which are | |
931 | * mapped via the block device. Since these pages could have journal heads | |
932 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
933 | * jbd2 layer's try_to_free_buffers() function to release them. | |
934 | */ | |
935 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) | |
936 | { | |
937 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
938 | ||
939 | WARN_ON(PageChecked(page)); | |
940 | if (!page_has_buffers(page)) | |
941 | return 0; | |
942 | if (journal) | |
943 | return jbd2_journal_try_to_free_buffers(journal, page, | |
944 | wait & ~__GFP_WAIT); | |
945 | return try_to_free_buffers(page); | |
946 | } | |
947 | ||
ac27a0ec | 948 | #ifdef CONFIG_QUOTA |
af5bc92d | 949 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 950 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 951 | |
617ba13b MC |
952 | static int ext4_write_dquot(struct dquot *dquot); |
953 | static int ext4_acquire_dquot(struct dquot *dquot); | |
954 | static int ext4_release_dquot(struct dquot *dquot); | |
955 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
956 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
957 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
958 | char *path, int remount); | |
617ba13b MC |
959 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
960 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 961 | size_t len, loff_t off); |
617ba13b | 962 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
963 | const char *data, size_t len, loff_t off); |
964 | ||
617ba13b | 965 | static struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
966 | .initialize = dquot_initialize, |
967 | .drop = dquot_drop, | |
ac27a0ec | 968 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
969 | .reserve_space = dquot_reserve_space, |
970 | .claim_space = dquot_claim_space, | |
971 | .release_rsv = dquot_release_reserved_space, | |
972 | .get_reserved_space = ext4_get_reserved_space, | |
ac27a0ec DK |
973 | .alloc_inode = dquot_alloc_inode, |
974 | .free_space = dquot_free_space, | |
975 | .free_inode = dquot_free_inode, | |
976 | .transfer = dquot_transfer, | |
617ba13b MC |
977 | .write_dquot = ext4_write_dquot, |
978 | .acquire_dquot = ext4_acquire_dquot, | |
979 | .release_dquot = ext4_release_dquot, | |
980 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
981 | .write_info = ext4_write_info, |
982 | .alloc_dquot = dquot_alloc, | |
983 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
984 | }; |
985 | ||
617ba13b MC |
986 | static struct quotactl_ops ext4_qctl_operations = { |
987 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
988 | .quota_off = vfs_quota_off, |
989 | .quota_sync = vfs_quota_sync, | |
990 | .get_info = vfs_get_dqinfo, | |
991 | .set_info = vfs_set_dqinfo, | |
992 | .get_dqblk = vfs_get_dqblk, | |
993 | .set_dqblk = vfs_set_dqblk | |
994 | }; | |
995 | #endif | |
996 | ||
ee9b6d61 | 997 | static const struct super_operations ext4_sops = { |
617ba13b MC |
998 | .alloc_inode = ext4_alloc_inode, |
999 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1000 | .write_inode = ext4_write_inode, |
1001 | .dirty_inode = ext4_dirty_inode, | |
1002 | .delete_inode = ext4_delete_inode, | |
1003 | .put_super = ext4_put_super, | |
617ba13b | 1004 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1005 | .freeze_fs = ext4_freeze, |
1006 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1007 | .statfs = ext4_statfs, |
1008 | .remount_fs = ext4_remount, | |
1009 | .clear_inode = ext4_clear_inode, | |
1010 | .show_options = ext4_show_options, | |
ac27a0ec | 1011 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1012 | .quota_read = ext4_quota_read, |
1013 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1014 | #endif |
c39a7f84 | 1015 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1016 | }; |
1017 | ||
9ca92389 TT |
1018 | static const struct super_operations ext4_nojournal_sops = { |
1019 | .alloc_inode = ext4_alloc_inode, | |
1020 | .destroy_inode = ext4_destroy_inode, | |
1021 | .write_inode = ext4_write_inode, | |
1022 | .dirty_inode = ext4_dirty_inode, | |
1023 | .delete_inode = ext4_delete_inode, | |
1024 | .write_super = ext4_write_super, | |
1025 | .put_super = ext4_put_super, | |
1026 | .statfs = ext4_statfs, | |
1027 | .remount_fs = ext4_remount, | |
1028 | .clear_inode = ext4_clear_inode, | |
1029 | .show_options = ext4_show_options, | |
1030 | #ifdef CONFIG_QUOTA | |
1031 | .quota_read = ext4_quota_read, | |
1032 | .quota_write = ext4_quota_write, | |
1033 | #endif | |
1034 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1035 | }; | |
1036 | ||
39655164 | 1037 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1038 | .fh_to_dentry = ext4_fh_to_dentry, |
1039 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1040 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1041 | }; |
1042 | ||
1043 | enum { | |
1044 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1045 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1046 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1047 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1048 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1049 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1050 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1051 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1052 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
f4033903 | 1053 | Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, |
ac27a0ec DK |
1054 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1055 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
06705bff TT |
1056 | Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, |
1057 | Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1058 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1059 | Opt_block_validity, Opt_noblock_validity, |
b3881f74 | 1060 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1061 | }; |
1062 | ||
a447c093 | 1063 | static const match_table_t tokens = { |
ac27a0ec DK |
1064 | {Opt_bsd_df, "bsddf"}, |
1065 | {Opt_minix_df, "minixdf"}, | |
1066 | {Opt_grpid, "grpid"}, | |
1067 | {Opt_grpid, "bsdgroups"}, | |
1068 | {Opt_nogrpid, "nogrpid"}, | |
1069 | {Opt_nogrpid, "sysvgroups"}, | |
1070 | {Opt_resgid, "resgid=%u"}, | |
1071 | {Opt_resuid, "resuid=%u"}, | |
1072 | {Opt_sb, "sb=%u"}, | |
1073 | {Opt_err_cont, "errors=continue"}, | |
1074 | {Opt_err_panic, "errors=panic"}, | |
1075 | {Opt_err_ro, "errors=remount-ro"}, | |
1076 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1077 | {Opt_debug, "debug"}, |
1078 | {Opt_oldalloc, "oldalloc"}, | |
1079 | {Opt_orlov, "orlov"}, | |
1080 | {Opt_user_xattr, "user_xattr"}, | |
1081 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1082 | {Opt_acl, "acl"}, | |
1083 | {Opt_noacl, "noacl"}, | |
ac27a0ec DK |
1084 | {Opt_noload, "noload"}, |
1085 | {Opt_nobh, "nobh"}, | |
1086 | {Opt_bh, "bh"}, | |
1087 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1088 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1089 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1090 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1091 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1092 | {Opt_journal_checksum, "journal_checksum"}, |
1093 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1094 | {Opt_abort, "abort"}, |
1095 | {Opt_data_journal, "data=journal"}, | |
1096 | {Opt_data_ordered, "data=ordered"}, | |
1097 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1098 | {Opt_data_err_abort, "data_err=abort"}, |
1099 | {Opt_data_err_ignore, "data_err=ignore"}, | |
f4033903 | 1100 | {Opt_mb_history_length, "mb_history_length=%u"}, |
ac27a0ec DK |
1101 | {Opt_offusrjquota, "usrjquota="}, |
1102 | {Opt_usrjquota, "usrjquota=%s"}, | |
1103 | {Opt_offgrpjquota, "grpjquota="}, | |
1104 | {Opt_grpjquota, "grpjquota=%s"}, | |
1105 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1106 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1107 | {Opt_grpquota, "grpquota"}, | |
1108 | {Opt_noquota, "noquota"}, | |
1109 | {Opt_quota, "quota"}, | |
1110 | {Opt_usrquota, "usrquota"}, | |
1111 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1112 | {Opt_barrier, "barrier"}, |
1113 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1114 | {Opt_i_version, "i_version"}, |
c9de560d | 1115 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1116 | {Opt_resize, "resize"}, |
64769240 | 1117 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1118 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1119 | {Opt_block_validity, "block_validity"}, |
1120 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1121 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1122 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1123 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1124 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1125 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
f3f12faa | 1126 | {Opt_err, NULL}, |
ac27a0ec DK |
1127 | }; |
1128 | ||
617ba13b | 1129 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1130 | { |
617ba13b | 1131 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1132 | char *options = (char *) *data; |
1133 | ||
1134 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1135 | return 1; /* Default location */ | |
1136 | options += 3; | |
617ba13b | 1137 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1138 | sb_block = simple_strtoul(options, &options, 0); |
1139 | if (*options && *options != ',') { | |
4776004f | 1140 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1141 | (char *) *data); |
1142 | return 1; | |
1143 | } | |
1144 | if (*options == ',') | |
1145 | options++; | |
1146 | *data = (void *) options; | |
1147 | return sb_block; | |
1148 | } | |
1149 | ||
b3881f74 TT |
1150 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1151 | ||
2b2d6d01 | 1152 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1153 | unsigned long *journal_devnum, |
b3881f74 | 1154 | unsigned int *journal_ioprio, |
2b2d6d01 | 1155 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1156 | { |
617ba13b | 1157 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1158 | char *p; |
ac27a0ec DK |
1159 | substring_t args[MAX_OPT_ARGS]; |
1160 | int data_opt = 0; | |
1161 | int option; | |
1162 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1163 | int qtype, qfmt; |
ac27a0ec DK |
1164 | char *qname; |
1165 | #endif | |
1166 | ||
1167 | if (!options) | |
1168 | return 1; | |
1169 | ||
2b2d6d01 | 1170 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1171 | int token; |
1172 | if (!*p) | |
1173 | continue; | |
1174 | ||
1175 | token = match_token(p, tokens, args); | |
1176 | switch (token) { | |
1177 | case Opt_bsd_df: | |
2b2d6d01 | 1178 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1179 | break; |
1180 | case Opt_minix_df: | |
2b2d6d01 | 1181 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1182 | break; |
1183 | case Opt_grpid: | |
2b2d6d01 | 1184 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1185 | break; |
1186 | case Opt_nogrpid: | |
2b2d6d01 | 1187 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1188 | break; |
1189 | case Opt_resuid: | |
1190 | if (match_int(&args[0], &option)) | |
1191 | return 0; | |
1192 | sbi->s_resuid = option; | |
1193 | break; | |
1194 | case Opt_resgid: | |
1195 | if (match_int(&args[0], &option)) | |
1196 | return 0; | |
1197 | sbi->s_resgid = option; | |
1198 | break; | |
1199 | case Opt_sb: | |
1200 | /* handled by get_sb_block() instead of here */ | |
1201 | /* *sb_block = match_int(&args[0]); */ | |
1202 | break; | |
1203 | case Opt_err_panic: | |
2b2d6d01 TT |
1204 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1205 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1206 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1207 | break; |
1208 | case Opt_err_ro: | |
2b2d6d01 TT |
1209 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1210 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1211 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1212 | break; |
1213 | case Opt_err_cont: | |
2b2d6d01 TT |
1214 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1215 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1216 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1217 | break; |
1218 | case Opt_nouid32: | |
2b2d6d01 | 1219 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1220 | break; |
ac27a0ec | 1221 | case Opt_debug: |
2b2d6d01 | 1222 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1223 | break; |
1224 | case Opt_oldalloc: | |
2b2d6d01 | 1225 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1226 | break; |
1227 | case Opt_orlov: | |
2b2d6d01 | 1228 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1229 | break; |
03010a33 | 1230 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1231 | case Opt_user_xattr: |
2b2d6d01 | 1232 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1233 | break; |
1234 | case Opt_nouser_xattr: | |
2b2d6d01 | 1235 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1236 | break; |
1237 | #else | |
1238 | case Opt_user_xattr: | |
1239 | case Opt_nouser_xattr: | |
4776004f TT |
1240 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1241 | "not supported\n"); | |
ac27a0ec DK |
1242 | break; |
1243 | #endif | |
03010a33 | 1244 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1245 | case Opt_acl: |
1246 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1247 | break; | |
1248 | case Opt_noacl: | |
1249 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1250 | break; | |
1251 | #else | |
1252 | case Opt_acl: | |
1253 | case Opt_noacl: | |
4776004f TT |
1254 | printk(KERN_ERR "EXT4 (no)acl options " |
1255 | "not supported\n"); | |
ac27a0ec DK |
1256 | break; |
1257 | #endif | |
ac27a0ec DK |
1258 | case Opt_journal_update: |
1259 | /* @@@ FIXME */ | |
1260 | /* Eventually we will want to be able to create | |
1261 | a journal file here. For now, only allow the | |
1262 | user to specify an existing inode to be the | |
1263 | journal file. */ | |
1264 | if (is_remount) { | |
617ba13b | 1265 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1266 | "journal on remount\n"); |
1267 | return 0; | |
1268 | } | |
2b2d6d01 | 1269 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1270 | break; |
ac27a0ec DK |
1271 | case Opt_journal_dev: |
1272 | if (is_remount) { | |
617ba13b | 1273 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1274 | "journal on remount\n"); |
1275 | return 0; | |
1276 | } | |
1277 | if (match_int(&args[0], &option)) | |
1278 | return 0; | |
1279 | *journal_devnum = option; | |
1280 | break; | |
818d276c GS |
1281 | case Opt_journal_checksum: |
1282 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1283 | break; | |
1284 | case Opt_journal_async_commit: | |
1285 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1286 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1287 | break; | |
ac27a0ec | 1288 | case Opt_noload: |
2b2d6d01 | 1289 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1290 | break; |
1291 | case Opt_commit: | |
1292 | if (match_int(&args[0], &option)) | |
1293 | return 0; | |
1294 | if (option < 0) | |
1295 | return 0; | |
1296 | if (option == 0) | |
cd02ff0b | 1297 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1298 | sbi->s_commit_interval = HZ * option; |
1299 | break; | |
30773840 TT |
1300 | case Opt_max_batch_time: |
1301 | if (match_int(&args[0], &option)) | |
1302 | return 0; | |
1303 | if (option < 0) | |
1304 | return 0; | |
1305 | if (option == 0) | |
1306 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1307 | sbi->s_max_batch_time = option; | |
1308 | break; | |
1309 | case Opt_min_batch_time: | |
1310 | if (match_int(&args[0], &option)) | |
1311 | return 0; | |
1312 | if (option < 0) | |
1313 | return 0; | |
1314 | sbi->s_min_batch_time = option; | |
1315 | break; | |
ac27a0ec | 1316 | case Opt_data_journal: |
617ba13b | 1317 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1318 | goto datacheck; |
1319 | case Opt_data_ordered: | |
617ba13b | 1320 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1321 | goto datacheck; |
1322 | case Opt_data_writeback: | |
617ba13b | 1323 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1324 | datacheck: |
1325 | if (is_remount) { | |
617ba13b | 1326 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1327 | != data_opt) { |
1328 | printk(KERN_ERR | |
617ba13b | 1329 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1330 | "mode on remount\n"); |
1331 | return 0; | |
1332 | } | |
1333 | } else { | |
617ba13b | 1334 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1335 | sbi->s_mount_opt |= data_opt; |
1336 | } | |
1337 | break; | |
5bf5683a HK |
1338 | case Opt_data_err_abort: |
1339 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1340 | break; | |
1341 | case Opt_data_err_ignore: | |
1342 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1343 | break; | |
f4033903 CW |
1344 | case Opt_mb_history_length: |
1345 | if (match_int(&args[0], &option)) | |
1346 | return 0; | |
1347 | if (option < 0) | |
1348 | return 0; | |
1349 | sbi->s_mb_history_max = option; | |
1350 | break; | |
ac27a0ec DK |
1351 | #ifdef CONFIG_QUOTA |
1352 | case Opt_usrjquota: | |
1353 | qtype = USRQUOTA; | |
1354 | goto set_qf_name; | |
1355 | case Opt_grpjquota: | |
1356 | qtype = GRPQUOTA; | |
1357 | set_qf_name: | |
17bd13b3 | 1358 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1359 | !sbi->s_qf_names[qtype]) { |
ac27a0ec | 1360 | printk(KERN_ERR |
4776004f TT |
1361 | "EXT4-fs: Cannot change journaled " |
1362 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1363 | return 0; |
1364 | } | |
1365 | qname = match_strdup(&args[0]); | |
1366 | if (!qname) { | |
1367 | printk(KERN_ERR | |
617ba13b | 1368 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1369 | "storing quotafile name.\n"); |
1370 | return 0; | |
1371 | } | |
1372 | if (sbi->s_qf_names[qtype] && | |
1373 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1374 | printk(KERN_ERR | |
617ba13b | 1375 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1376 | "specified.\n", QTYPE2NAME(qtype)); |
1377 | kfree(qname); | |
1378 | return 0; | |
1379 | } | |
1380 | sbi->s_qf_names[qtype] = qname; | |
1381 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1382 | printk(KERN_ERR | |
617ba13b | 1383 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1384 | "filesystem root.\n"); |
1385 | kfree(sbi->s_qf_names[qtype]); | |
1386 | sbi->s_qf_names[qtype] = NULL; | |
1387 | return 0; | |
1388 | } | |
1389 | set_opt(sbi->s_mount_opt, QUOTA); | |
1390 | break; | |
1391 | case Opt_offusrjquota: | |
1392 | qtype = USRQUOTA; | |
1393 | goto clear_qf_name; | |
1394 | case Opt_offgrpjquota: | |
1395 | qtype = GRPQUOTA; | |
1396 | clear_qf_name: | |
17bd13b3 | 1397 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1398 | sbi->s_qf_names[qtype]) { |
617ba13b | 1399 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1400 | "journaled quota options when " |
ac27a0ec DK |
1401 | "quota turned on.\n"); |
1402 | return 0; | |
1403 | } | |
1404 | /* | |
1405 | * The space will be released later when all options | |
1406 | * are confirmed to be correct | |
1407 | */ | |
1408 | sbi->s_qf_names[qtype] = NULL; | |
1409 | break; | |
1410 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1411 | qfmt = QFMT_VFS_OLD; |
1412 | goto set_qf_format; | |
ac27a0ec | 1413 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1414 | qfmt = QFMT_VFS_V0; |
1415 | set_qf_format: | |
17bd13b3 | 1416 | if (sb_any_quota_loaded(sb) && |
dfc5d03f JK |
1417 | sbi->s_jquota_fmt != qfmt) { |
1418 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1419 | "journaled quota options when " | |
1420 | "quota turned on.\n"); | |
1421 | return 0; | |
1422 | } | |
1423 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1424 | break; |
1425 | case Opt_quota: | |
1426 | case Opt_usrquota: | |
1427 | set_opt(sbi->s_mount_opt, QUOTA); | |
1428 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1429 | break; | |
1430 | case Opt_grpquota: | |
1431 | set_opt(sbi->s_mount_opt, QUOTA); | |
1432 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1433 | break; | |
1434 | case Opt_noquota: | |
17bd13b3 | 1435 | if (sb_any_quota_loaded(sb)) { |
617ba13b | 1436 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1437 | "options when quota turned on.\n"); |
1438 | return 0; | |
1439 | } | |
1440 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1441 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1442 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1443 | break; | |
1444 | #else | |
1445 | case Opt_quota: | |
1446 | case Opt_usrquota: | |
1447 | case Opt_grpquota: | |
cd59e7b9 JK |
1448 | printk(KERN_ERR |
1449 | "EXT4-fs: quota options not supported.\n"); | |
1450 | break; | |
ac27a0ec DK |
1451 | case Opt_usrjquota: |
1452 | case Opt_grpjquota: | |
1453 | case Opt_offusrjquota: | |
1454 | case Opt_offgrpjquota: | |
1455 | case Opt_jqfmt_vfsold: | |
1456 | case Opt_jqfmt_vfsv0: | |
1457 | printk(KERN_ERR | |
cd59e7b9 | 1458 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1459 | "supported.\n"); |
1460 | break; | |
1461 | case Opt_noquota: | |
1462 | break; | |
1463 | #endif | |
1464 | case Opt_abort: | |
1465 | set_opt(sbi->s_mount_opt, ABORT); | |
1466 | break; | |
06705bff TT |
1467 | case Opt_nobarrier: |
1468 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1469 | break; | |
ac27a0ec | 1470 | case Opt_barrier: |
06705bff TT |
1471 | if (match_int(&args[0], &option)) { |
1472 | set_opt(sbi->s_mount_opt, BARRIER); | |
1473 | break; | |
1474 | } | |
ac27a0ec DK |
1475 | if (option) |
1476 | set_opt(sbi->s_mount_opt, BARRIER); | |
1477 | else | |
1478 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1479 | break; | |
1480 | case Opt_ignore: | |
1481 | break; | |
1482 | case Opt_resize: | |
1483 | if (!is_remount) { | |
617ba13b | 1484 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1485 | "for remount\n"); |
1486 | return 0; | |
1487 | } | |
1488 | if (match_int(&args[0], &option) != 0) | |
1489 | return 0; | |
1490 | *n_blocks_count = option; | |
1491 | break; | |
1492 | case Opt_nobh: | |
1493 | set_opt(sbi->s_mount_opt, NOBH); | |
1494 | break; | |
1495 | case Opt_bh: | |
1496 | clear_opt(sbi->s_mount_opt, NOBH); | |
1497 | break; | |
25ec56b5 JNC |
1498 | case Opt_i_version: |
1499 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1500 | sb->s_flags |= MS_I_VERSION; | |
1501 | break; | |
dd919b98 AK |
1502 | case Opt_nodelalloc: |
1503 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1504 | break; | |
c9de560d AT |
1505 | case Opt_stripe: |
1506 | if (match_int(&args[0], &option)) | |
1507 | return 0; | |
1508 | if (option < 0) | |
1509 | return 0; | |
1510 | sbi->s_stripe = option; | |
1511 | break; | |
64769240 AT |
1512 | case Opt_delalloc: |
1513 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1514 | break; | |
6fd058f7 TT |
1515 | case Opt_block_validity: |
1516 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1517 | break; | |
1518 | case Opt_noblock_validity: | |
1519 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1520 | break; | |
240799cd TT |
1521 | case Opt_inode_readahead_blks: |
1522 | if (match_int(&args[0], &option)) | |
1523 | return 0; | |
1524 | if (option < 0 || option > (1 << 30)) | |
1525 | return 0; | |
f7c43950 | 1526 | if (!is_power_of_2(option)) { |
3197ebdb TT |
1527 | printk(KERN_ERR "EXT4-fs: inode_readahead_blks" |
1528 | " must be a power of 2\n"); | |
1529 | return 0; | |
1530 | } | |
240799cd TT |
1531 | sbi->s_inode_readahead_blks = option; |
1532 | break; | |
b3881f74 TT |
1533 | case Opt_journal_ioprio: |
1534 | if (match_int(&args[0], &option)) | |
1535 | return 0; | |
1536 | if (option < 0 || option > 7) | |
1537 | break; | |
1538 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1539 | option); | |
1540 | break; | |
06705bff TT |
1541 | case Opt_noauto_da_alloc: |
1542 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1543 | break; | |
afd4672d | 1544 | case Opt_auto_da_alloc: |
06705bff TT |
1545 | if (match_int(&args[0], &option)) { |
1546 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1547 | break; | |
1548 | } | |
afd4672d TT |
1549 | if (option) |
1550 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1551 | else | |
1552 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1553 | break; | |
ac27a0ec | 1554 | default: |
2b2d6d01 TT |
1555 | printk(KERN_ERR |
1556 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1557 | "or missing value\n", p); | |
ac27a0ec DK |
1558 | return 0; |
1559 | } | |
1560 | } | |
1561 | #ifdef CONFIG_QUOTA | |
1562 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1563 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1564 | sbi->s_qf_names[USRQUOTA]) |
1565 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1566 | ||
617ba13b | 1567 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1568 | sbi->s_qf_names[GRPQUOTA]) |
1569 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1570 | ||
1571 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1572 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1573 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1574 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1575 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1576 | "format mixing.\n"); |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1581 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1582 | "not specified.\n"); |
1583 | return 0; | |
1584 | } | |
1585 | } else { | |
1586 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1587 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1588 | "specified with no journaling " | |
ac27a0ec DK |
1589 | "enabled.\n"); |
1590 | return 0; | |
1591 | } | |
1592 | } | |
1593 | #endif | |
1594 | return 1; | |
1595 | } | |
1596 | ||
617ba13b | 1597 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1598 | int read_only) |
1599 | { | |
617ba13b | 1600 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1601 | int res = 0; |
1602 | ||
617ba13b | 1603 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1604 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1605 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1606 | res = MS_RDONLY; |
1607 | } | |
1608 | if (read_only) | |
1609 | return res; | |
617ba13b | 1610 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1611 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1612 | "running e2fsck is recommended\n"); | |
617ba13b | 1613 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1614 | printk(KERN_WARNING |
1615 | "EXT4-fs warning: mounting fs with errors, " | |
1616 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1617 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1618 | le16_to_cpu(es->s_mnt_count) >= | |
1619 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1620 | printk(KERN_WARNING |
1621 | "EXT4-fs warning: maximal mount count reached, " | |
1622 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1623 | else if (le32_to_cpu(es->s_checkinterval) && |
1624 | (le32_to_cpu(es->s_lastcheck) + | |
1625 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1626 | printk(KERN_WARNING |
1627 | "EXT4-fs warning: checktime reached, " | |
1628 | "running e2fsck is recommended\n"); | |
0390131b FM |
1629 | if (!sbi->s_journal) |
1630 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); | |
ac27a0ec | 1631 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1632 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1633 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1634 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1635 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1636 | if (sbi->s_journal) |
1637 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1638 | |
e2d67052 | 1639 | ext4_commit_super(sb, 1); |
ac27a0ec | 1640 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1641 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
ac27a0ec DK |
1642 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1643 | sb->s_blocksize, | |
1644 | sbi->s_groups_count, | |
617ba13b MC |
1645 | EXT4_BLOCKS_PER_GROUP(sb), |
1646 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1647 | sbi->s_mount_opt); |
1648 | ||
0390131b FM |
1649 | if (EXT4_SB(sb)->s_journal) { |
1650 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", | |
1651 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1652 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
1653 | } else { | |
1654 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); | |
1655 | } | |
ac27a0ec DK |
1656 | return res; |
1657 | } | |
1658 | ||
772cb7c8 JS |
1659 | static int ext4_fill_flex_info(struct super_block *sb) |
1660 | { | |
1661 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1662 | struct ext4_group_desc *gdp = NULL; | |
1663 | struct buffer_head *bh; | |
1664 | ext4_group_t flex_group_count; | |
1665 | ext4_group_t flex_group; | |
1666 | int groups_per_flex = 0; | |
c5ca7c76 | 1667 | size_t size; |
772cb7c8 JS |
1668 | int i; |
1669 | ||
1670 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1671 | sbi->s_log_groups_per_flex = 0; | |
1672 | return 1; | |
1673 | } | |
1674 | ||
1675 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1676 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1677 | ||
c62a11fd FB |
1678 | /* We allocate both existing and potentially added groups */ |
1679 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1680 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1681 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1682 | size = flex_group_count * sizeof(struct flex_groups); |
1683 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1684 | if (sbi->s_flex_groups == NULL) { | |
1685 | sbi->s_flex_groups = vmalloc(size); | |
1686 | if (sbi->s_flex_groups) | |
1687 | memset(sbi->s_flex_groups, 0, size); | |
1688 | } | |
772cb7c8 | 1689 | if (sbi->s_flex_groups == NULL) { |
ec05e868 | 1690 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
a9df9a49 | 1691 | "%u flex groups\n", flex_group_count); |
772cb7c8 JS |
1692 | goto failed; |
1693 | } | |
772cb7c8 | 1694 | |
772cb7c8 JS |
1695 | for (i = 0; i < sbi->s_groups_count; i++) { |
1696 | gdp = ext4_get_group_desc(sb, i, &bh); | |
1697 | ||
1698 | flex_group = ext4_flex_group(sbi, i); | |
9f24e420 TT |
1699 | atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, |
1700 | ext4_free_inodes_count(sb, gdp)); | |
1701 | atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, | |
1702 | ext4_free_blks_count(sb, gdp)); | |
7d39db14 TT |
1703 | atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, |
1704 | ext4_used_dirs_count(sb, gdp)); | |
772cb7c8 JS |
1705 | } |
1706 | ||
1707 | return 1; | |
1708 | failed: | |
1709 | return 0; | |
1710 | } | |
1711 | ||
717d50e4 AD |
1712 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1713 | struct ext4_group_desc *gdp) | |
1714 | { | |
1715 | __u16 crc = 0; | |
1716 | ||
1717 | if (sbi->s_es->s_feature_ro_compat & | |
1718 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1719 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1720 | __le32 le_group = cpu_to_le32(block_group); | |
1721 | ||
1722 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1723 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1724 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1725 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1726 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1727 | if ((sbi->s_es->s_feature_incompat & | |
1728 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1729 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1730 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1731 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1732 | offset); | |
1733 | } | |
1734 | ||
1735 | return cpu_to_le16(crc); | |
1736 | } | |
1737 | ||
1738 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1739 | struct ext4_group_desc *gdp) | |
1740 | { | |
1741 | if ((sbi->s_es->s_feature_ro_compat & | |
1742 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1743 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1744 | return 0; | |
1745 | ||
1746 | return 1; | |
1747 | } | |
1748 | ||
ac27a0ec | 1749 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1750 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1751 | { |
617ba13b MC |
1752 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1753 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1754 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1755 | ext4_fsblk_t block_bitmap; |
1756 | ext4_fsblk_t inode_bitmap; | |
1757 | ext4_fsblk_t inode_table; | |
ce421581 | 1758 | int flexbg_flag = 0; |
fd2d4291 | 1759 | ext4_group_t i; |
ac27a0ec | 1760 | |
ce421581 JS |
1761 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1762 | flexbg_flag = 1; | |
1763 | ||
af5bc92d | 1764 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1765 | |
197cd65a AM |
1766 | for (i = 0; i < sbi->s_groups_count; i++) { |
1767 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1768 | ||
ce421581 | 1769 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1770 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1771 | else |
1772 | last_block = first_block + | |
617ba13b | 1773 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1774 | |
8fadc143 | 1775 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1776 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 | 1777 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1778 | "Block bitmap for group %u not in group " |
5128273a | 1779 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1780 | return 0; |
1781 | } | |
8fadc143 | 1782 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1783 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 | 1784 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1785 | "Inode bitmap for group %u not in group " |
5128273a | 1786 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1787 | return 0; |
1788 | } | |
8fadc143 | 1789 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1790 | if (inode_table < first_block || |
2b2d6d01 | 1791 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 | 1792 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1793 | "Inode table for group %u not in group " |
5128273a | 1794 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1795 | return 0; |
1796 | } | |
955ce5f5 | 1797 | ext4_lock_group(sb, i); |
717d50e4 | 1798 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 | 1799 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1800 | "Checksum for group %u failed (%u!=%u)\n", |
c19204b0 JB |
1801 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
1802 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 1803 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 1804 | ext4_unlock_group(sb, i); |
8a266467 | 1805 | return 0; |
7ee1ec4c | 1806 | } |
717d50e4 | 1807 | } |
955ce5f5 | 1808 | ext4_unlock_group(sb, i); |
ce421581 JS |
1809 | if (!flexbg_flag) |
1810 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1811 | } |
1812 | ||
bd81d8ee | 1813 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
2b2d6d01 | 1814 | sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1815 | return 1; |
1816 | } | |
1817 | ||
617ba13b | 1818 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1819 | * the superblock) which were deleted from all directories, but held open by |
1820 | * a process at the time of a crash. We walk the list and try to delete these | |
1821 | * inodes at recovery time (only with a read-write filesystem). | |
1822 | * | |
1823 | * In order to keep the orphan inode chain consistent during traversal (in | |
1824 | * case of crash during recovery), we link each inode into the superblock | |
1825 | * orphan list_head and handle it the same way as an inode deletion during | |
1826 | * normal operation (which journals the operations for us). | |
1827 | * | |
1828 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1829 | * accidentally point at an in-use or already deleted inode. The worst that | |
1830 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1831 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1832 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1833 | * inode cleanup for us, so we can safely abort without any further action. | |
1834 | */ | |
2b2d6d01 TT |
1835 | static void ext4_orphan_cleanup(struct super_block *sb, |
1836 | struct ext4_super_block *es) | |
ac27a0ec DK |
1837 | { |
1838 | unsigned int s_flags = sb->s_flags; | |
1839 | int nr_orphans = 0, nr_truncates = 0; | |
1840 | #ifdef CONFIG_QUOTA | |
1841 | int i; | |
1842 | #endif | |
1843 | if (!es->s_last_orphan) { | |
1844 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1845 | return; | |
1846 | } | |
1847 | ||
a8f48a95 ES |
1848 | if (bdev_read_only(sb->s_bdev)) { |
1849 | printk(KERN_ERR "EXT4-fs: write access " | |
1850 | "unavailable, skipping orphan cleanup.\n"); | |
1851 | return; | |
1852 | } | |
1853 | ||
617ba13b | 1854 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1855 | if (es->s_last_orphan) |
1856 | jbd_debug(1, "Errors on filesystem, " | |
1857 | "clearing orphan list.\n"); | |
1858 | es->s_last_orphan = 0; | |
1859 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1860 | return; | |
1861 | } | |
1862 | ||
1863 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1864 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1865 | sb->s_id); |
1866 | sb->s_flags &= ~MS_RDONLY; | |
1867 | } | |
1868 | #ifdef CONFIG_QUOTA | |
1869 | /* Needed for iput() to work correctly and not trash data */ | |
1870 | sb->s_flags |= MS_ACTIVE; | |
1871 | /* Turn on quotas so that they are updated correctly */ | |
1872 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1873 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1874 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1875 | if (ret < 0) |
1876 | printk(KERN_ERR | |
2c8be6b2 | 1877 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1878 | "quota: error %d\n", ret); |
1879 | } | |
1880 | } | |
1881 | #endif | |
1882 | ||
1883 | while (es->s_last_orphan) { | |
1884 | struct inode *inode; | |
1885 | ||
97bd42b9 JB |
1886 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1887 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1888 | es->s_last_orphan = 0; |
1889 | break; | |
1890 | } | |
1891 | ||
617ba13b | 1892 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 1893 | vfs_dq_init(inode); |
ac27a0ec DK |
1894 | if (inode->i_nlink) { |
1895 | printk(KERN_DEBUG | |
e5f8eab8 | 1896 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1897 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1898 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1899 | inode->i_ino, inode->i_size); |
617ba13b | 1900 | ext4_truncate(inode); |
ac27a0ec DK |
1901 | nr_truncates++; |
1902 | } else { | |
1903 | printk(KERN_DEBUG | |
1904 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1905 | __func__, inode->i_ino); |
ac27a0ec DK |
1906 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1907 | inode->i_ino); | |
1908 | nr_orphans++; | |
1909 | } | |
1910 | iput(inode); /* The delete magic happens here! */ | |
1911 | } | |
1912 | ||
2b2d6d01 | 1913 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1914 | |
1915 | if (nr_orphans) | |
617ba13b | 1916 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1917 | sb->s_id, PLURAL(nr_orphans)); |
1918 | if (nr_truncates) | |
617ba13b | 1919 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1920 | sb->s_id, PLURAL(nr_truncates)); |
1921 | #ifdef CONFIG_QUOTA | |
1922 | /* Turn quotas off */ | |
1923 | for (i = 0; i < MAXQUOTAS; i++) { | |
1924 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1925 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1926 | } |
1927 | #endif | |
1928 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1929 | } | |
cd2291a4 ES |
1930 | /* |
1931 | * Maximal extent format file size. | |
1932 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1933 | * extent format containers, within a sector_t, and within i_blocks | |
1934 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1935 | * so that won't be a limiting factor. | |
1936 | * | |
1937 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1938 | */ | |
f287a1a5 | 1939 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1940 | { |
1941 | loff_t res; | |
1942 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1943 | ||
1944 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1945 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1946 | /* |
b3a6ffe1 | 1947 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1948 | * i_block represent total blocks in 512 bytes |
1949 | * 32 == size of vfs inode i_blocks * 8 | |
1950 | */ | |
1951 | upper_limit = (1LL << 32) - 1; | |
1952 | ||
1953 | /* total blocks in file system block size */ | |
1954 | upper_limit >>= (blkbits - 9); | |
1955 | upper_limit <<= blkbits; | |
1956 | } | |
1957 | ||
1958 | /* 32-bit extent-start container, ee_block */ | |
1959 | res = 1LL << 32; | |
1960 | res <<= blkbits; | |
1961 | res -= 1; | |
1962 | ||
1963 | /* Sanity check against vm- & vfs- imposed limits */ | |
1964 | if (res > upper_limit) | |
1965 | res = upper_limit; | |
1966 | ||
1967 | return res; | |
1968 | } | |
ac27a0ec | 1969 | |
ac27a0ec | 1970 | /* |
cd2291a4 | 1971 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1972 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1973 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1974 | */ |
f287a1a5 | 1975 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1976 | { |
617ba13b | 1977 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1978 | int meta_blocks; |
1979 | loff_t upper_limit; | |
1980 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1981 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1982 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1983 | * does not exceed 2^48 -1 |
1984 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1985 | * total number of 512 bytes blocks of the file | |
1986 | */ | |
1987 | ||
f287a1a5 | 1988 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1989 | /* |
b3a6ffe1 | 1990 | * !has_huge_files or CONFIG_LBD is not enabled |
f287a1a5 TT |
1991 | * implies the inode i_block represent total blocks in |
1992 | * 512 bytes 32 == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1993 | */ |
1994 | upper_limit = (1LL << 32) - 1; | |
1995 | ||
1996 | /* total blocks in file system block size */ | |
1997 | upper_limit >>= (bits - 9); | |
1998 | ||
1999 | } else { | |
8180a562 AK |
2000 | /* |
2001 | * We use 48 bit ext4_inode i_blocks | |
2002 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2003 | * represent total number of blocks in | |
2004 | * file system block size | |
2005 | */ | |
0fc1b451 AK |
2006 | upper_limit = (1LL << 48) - 1; |
2007 | ||
0fc1b451 AK |
2008 | } |
2009 | ||
2010 | /* indirect blocks */ | |
2011 | meta_blocks = 1; | |
2012 | /* double indirect blocks */ | |
2013 | meta_blocks += 1 + (1LL << (bits-2)); | |
2014 | /* tripple indirect blocks */ | |
2015 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2016 | ||
2017 | upper_limit -= meta_blocks; | |
2018 | upper_limit <<= bits; | |
ac27a0ec DK |
2019 | |
2020 | res += 1LL << (bits-2); | |
2021 | res += 1LL << (2*(bits-2)); | |
2022 | res += 1LL << (3*(bits-2)); | |
2023 | res <<= bits; | |
2024 | if (res > upper_limit) | |
2025 | res = upper_limit; | |
0fc1b451 AK |
2026 | |
2027 | if (res > MAX_LFS_FILESIZE) | |
2028 | res = MAX_LFS_FILESIZE; | |
2029 | ||
ac27a0ec DK |
2030 | return res; |
2031 | } | |
2032 | ||
617ba13b | 2033 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 2034 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2035 | { |
617ba13b | 2036 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2037 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2038 | int has_super = 0; |
2039 | ||
2040 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2041 | ||
617ba13b | 2042 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2043 | nr < first_meta_bg) |
70bbb3e0 | 2044 | return logical_sb_block + nr + 1; |
ac27a0ec | 2045 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2046 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2047 | has_super = 1; |
617ba13b | 2048 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2049 | } |
2050 | ||
c9de560d AT |
2051 | /** |
2052 | * ext4_get_stripe_size: Get the stripe size. | |
2053 | * @sbi: In memory super block info | |
2054 | * | |
2055 | * If we have specified it via mount option, then | |
2056 | * use the mount option value. If the value specified at mount time is | |
2057 | * greater than the blocks per group use the super block value. | |
2058 | * If the super block value is greater than blocks per group return 0. | |
2059 | * Allocator needs it be less than blocks per group. | |
2060 | * | |
2061 | */ | |
2062 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2063 | { | |
2064 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2065 | unsigned long stripe_width = | |
2066 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2067 | ||
2068 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2069 | return sbi->s_stripe; | |
2070 | ||
2071 | if (stripe_width <= sbi->s_blocks_per_group) | |
2072 | return stripe_width; | |
2073 | ||
2074 | if (stride <= sbi->s_blocks_per_group) | |
2075 | return stride; | |
2076 | ||
2077 | return 0; | |
2078 | } | |
ac27a0ec | 2079 | |
3197ebdb TT |
2080 | /* sysfs supprt */ |
2081 | ||
2082 | struct ext4_attr { | |
2083 | struct attribute attr; | |
2084 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2085 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2086 | const char *, size_t); | |
2087 | int offset; | |
2088 | }; | |
2089 | ||
2090 | static int parse_strtoul(const char *buf, | |
2091 | unsigned long max, unsigned long *value) | |
2092 | { | |
2093 | char *endp; | |
2094 | ||
2095 | while (*buf && isspace(*buf)) | |
2096 | buf++; | |
2097 | *value = simple_strtoul(buf, &endp, 0); | |
2098 | while (*endp && isspace(*endp)) | |
2099 | endp++; | |
2100 | if (*endp || *value > max) | |
2101 | return -EINVAL; | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2107 | struct ext4_sb_info *sbi, | |
2108 | char *buf) | |
2109 | { | |
2110 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2111 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2112 | } | |
2113 | ||
2114 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2115 | struct ext4_sb_info *sbi, char *buf) | |
2116 | { | |
2117 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2118 | ||
2119 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2120 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2121 | sbi->s_sectors_written_start) >> 1); | |
2122 | } | |
2123 | ||
2124 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2125 | struct ext4_sb_info *sbi, char *buf) | |
2126 | { | |
2127 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2128 | ||
2129 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2130 | sbi->s_kbytes_written + | |
2131 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2132 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
2133 | } | |
2134 | ||
2135 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2136 | struct ext4_sb_info *sbi, | |
2137 | const char *buf, size_t count) | |
2138 | { | |
2139 | unsigned long t; | |
2140 | ||
2141 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2142 | return -EINVAL; | |
2143 | ||
f7c43950 | 2144 | if (!is_power_of_2(t)) |
3197ebdb TT |
2145 | return -EINVAL; |
2146 | ||
2147 | sbi->s_inode_readahead_blks = t; | |
2148 | return count; | |
2149 | } | |
2150 | ||
2151 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
2152 | struct ext4_sb_info *sbi, char *buf) | |
2153 | { | |
2154 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2155 | ||
2156 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2157 | } | |
2158 | ||
2159 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2160 | struct ext4_sb_info *sbi, | |
2161 | const char *buf, size_t count) | |
2162 | { | |
2163 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2164 | unsigned long t; | |
2165 | ||
2166 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2167 | return -EINVAL; | |
2168 | *ui = t; | |
2169 | return count; | |
2170 | } | |
2171 | ||
2172 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2173 | static struct ext4_attr ext4_attr_##_name = { \ | |
2174 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2175 | .show = _show, \ | |
2176 | .store = _store, \ | |
2177 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2178 | } | |
2179 | #define EXT4_ATTR(name, mode, show, store) \ | |
2180 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2181 | ||
2182 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2183 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2184 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2185 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2186 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2187 | ||
2188 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2189 | EXT4_RO_ATTR(session_write_kbytes); | |
2190 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2191 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2192 | inode_readahead_blks_store, s_inode_readahead_blks); | |
2193 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); | |
2194 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2195 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2196 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2197 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2198 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
2199 | ||
2200 | static struct attribute *ext4_attrs[] = { | |
2201 | ATTR_LIST(delayed_allocation_blocks), | |
2202 | ATTR_LIST(session_write_kbytes), | |
2203 | ATTR_LIST(lifetime_write_kbytes), | |
2204 | ATTR_LIST(inode_readahead_blks), | |
2205 | ATTR_LIST(mb_stats), | |
2206 | ATTR_LIST(mb_max_to_scan), | |
2207 | ATTR_LIST(mb_min_to_scan), | |
2208 | ATTR_LIST(mb_order2_req), | |
2209 | ATTR_LIST(mb_stream_req), | |
2210 | ATTR_LIST(mb_group_prealloc), | |
2211 | NULL, | |
2212 | }; | |
2213 | ||
2214 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2215 | struct attribute *attr, char *buf) | |
2216 | { | |
2217 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2218 | s_kobj); | |
2219 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2220 | ||
2221 | return a->show ? a->show(a, sbi, buf) : 0; | |
2222 | } | |
2223 | ||
2224 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2225 | struct attribute *attr, | |
2226 | const char *buf, size_t len) | |
2227 | { | |
2228 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2229 | s_kobj); | |
2230 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2231 | ||
2232 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2233 | } | |
2234 | ||
2235 | static void ext4_sb_release(struct kobject *kobj) | |
2236 | { | |
2237 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2238 | s_kobj); | |
2239 | complete(&sbi->s_kobj_unregister); | |
2240 | } | |
2241 | ||
2242 | ||
2243 | static struct sysfs_ops ext4_attr_ops = { | |
2244 | .show = ext4_attr_show, | |
2245 | .store = ext4_attr_store, | |
2246 | }; | |
2247 | ||
2248 | static struct kobj_type ext4_ktype = { | |
2249 | .default_attrs = ext4_attrs, | |
2250 | .sysfs_ops = &ext4_attr_ops, | |
2251 | .release = ext4_sb_release, | |
2252 | }; | |
2253 | ||
2b2d6d01 | 2254 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2255 | __releases(kernel_lock) |
2256 | __acquires(kernel_lock) | |
1d03ec98 | 2257 | |
ac27a0ec | 2258 | { |
2b2d6d01 | 2259 | struct buffer_head *bh; |
617ba13b MC |
2260 | struct ext4_super_block *es = NULL; |
2261 | struct ext4_sb_info *sbi; | |
2262 | ext4_fsblk_t block; | |
2263 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2264 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2265 | unsigned long offset = 0; |
ac27a0ec DK |
2266 | unsigned long journal_devnum = 0; |
2267 | unsigned long def_mount_opts; | |
2268 | struct inode *root; | |
9f6200bb | 2269 | char *cp; |
0390131b | 2270 | const char *descr; |
1d1fe1ee | 2271 | int ret = -EINVAL; |
ac27a0ec | 2272 | int blocksize; |
4ec11028 TT |
2273 | unsigned int db_count; |
2274 | unsigned int i; | |
f287a1a5 | 2275 | int needs_recovery, has_huge_files; |
3a06d778 | 2276 | int features; |
bd81d8ee | 2277 | __u64 blocks_count; |
833f4077 | 2278 | int err; |
b3881f74 | 2279 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2280 | |
2281 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2282 | if (!sbi) | |
2283 | return -ENOMEM; | |
705895b6 PE |
2284 | |
2285 | sbi->s_blockgroup_lock = | |
2286 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2287 | if (!sbi->s_blockgroup_lock) { | |
2288 | kfree(sbi); | |
2289 | return -ENOMEM; | |
2290 | } | |
ac27a0ec DK |
2291 | sb->s_fs_info = sbi; |
2292 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2293 | sbi->s_resuid = EXT4_DEF_RESUID; |
2294 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2295 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2296 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2297 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2298 | sectors[1]); | |
ac27a0ec DK |
2299 | |
2300 | unlock_kernel(); | |
2301 | ||
9f6200bb TT |
2302 | /* Cleanup superblock name */ |
2303 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2304 | *cp = '!'; | |
2305 | ||
617ba13b | 2306 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2307 | if (!blocksize) { |
617ba13b | 2308 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
2309 | goto out_fail; |
2310 | } | |
2311 | ||
2312 | /* | |
617ba13b | 2313 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2314 | * block sizes. We need to calculate the offset from buffer start. |
2315 | */ | |
617ba13b | 2316 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2317 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2318 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2319 | } else { |
70bbb3e0 | 2320 | logical_sb_block = sb_block; |
ac27a0ec DK |
2321 | } |
2322 | ||
70bbb3e0 | 2323 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 2324 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
2325 | goto out_fail; |
2326 | } | |
2327 | /* | |
2328 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2329 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2330 | */ |
617ba13b | 2331 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2332 | sbi->s_es = es; |
2333 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2334 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2335 | goto cantfind_ext4; | |
afc32f7e | 2336 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2337 | |
2338 | /* Set defaults before we parse the mount options */ | |
2339 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2340 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2341 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2342 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2343 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2344 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2345 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2346 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2347 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2348 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2349 | #endif |
03010a33 | 2350 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2351 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2352 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2353 | #endif |
617ba13b MC |
2354 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2355 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2356 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2357 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2358 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2359 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2360 | ||
2361 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2362 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2363 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2364 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2365 | else |
2366 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2367 | |
2368 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2369 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2370 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2371 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2372 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
f4033903 | 2373 | sbi->s_mb_history_max = default_mb_history_length; |
ac27a0ec | 2374 | |
571640ca | 2375 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2376 | |
dd919b98 AK |
2377 | /* |
2378 | * enable delayed allocation by default | |
2379 | * Use -o nodelalloc to turn it off | |
2380 | */ | |
2381 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2382 | ||
2383 | ||
b3881f74 TT |
2384 | if (!parse_options((char *) data, sb, &journal_devnum, |
2385 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2386 | goto failed_mount; |
2387 | ||
2388 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2389 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2390 | |
617ba13b MC |
2391 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2392 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2393 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2394 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 2395 | printk(KERN_WARNING |
617ba13b | 2396 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 2397 | "running e2fsck is recommended\n"); |
469108ff | 2398 | |
ac27a0ec DK |
2399 | /* |
2400 | * Check feature flags regardless of the revision level, since we | |
2401 | * previously didn't change the revision level when setting the flags, | |
2402 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2403 | */ | |
617ba13b | 2404 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2405 | if (features) { |
617ba13b | 2406 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
3a06d778 AK |
2407 | "unsupported optional features (%x).\n", sb->s_id, |
2408 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2409 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
ac27a0ec DK |
2410 | goto failed_mount; |
2411 | } | |
617ba13b | 2412 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2413 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2414 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
3a06d778 AK |
2415 | "unsupported optional features (%x).\n", sb->s_id, |
2416 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2417 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
2418 | goto failed_mount; |
2419 | } | |
f287a1a5 TT |
2420 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2421 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2422 | if (has_huge_files) { | |
0fc1b451 AK |
2423 | /* |
2424 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2425 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2426 | */ |
2427 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2428 | !(sb->s_flags & MS_RDONLY)) { | |
2429 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2430 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2431 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2432 | goto failed_mount; |
2433 | } | |
2434 | } | |
ac27a0ec DK |
2435 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2436 | ||
617ba13b MC |
2437 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2438 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2439 | printk(KERN_ERR |
617ba13b | 2440 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2441 | blocksize, sb->s_id); |
2442 | goto failed_mount; | |
2443 | } | |
2444 | ||
ac27a0ec | 2445 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2446 | |
2447 | /* Validate the filesystem blocksize */ | |
2448 | if (!sb_set_blocksize(sb, blocksize)) { | |
2449 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2450 | blocksize); | |
ac27a0ec DK |
2451 | goto failed_mount; |
2452 | } | |
2453 | ||
2b2d6d01 | 2454 | brelse(bh); |
70bbb3e0 AM |
2455 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2456 | offset = do_div(logical_sb_block, blocksize); | |
2457 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2458 | if (!bh) { |
2459 | printk(KERN_ERR | |
617ba13b | 2460 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2461 | goto failed_mount; |
2462 | } | |
617ba13b | 2463 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2464 | sbi->s_es = es; |
617ba13b | 2465 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2466 | printk(KERN_ERR |
2467 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2468 | goto failed_mount; |
2469 | } | |
2470 | } | |
2471 | ||
f287a1a5 TT |
2472 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2473 | has_huge_files); | |
2474 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2475 | |
617ba13b MC |
2476 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2477 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2478 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2479 | } else { |
2480 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2481 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2482 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2483 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2484 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2485 | printk(KERN_ERR |
2486 | "EXT4-fs: unsupported inode size: %d\n", | |
2487 | sbi->s_inode_size); | |
ac27a0ec DK |
2488 | goto failed_mount; |
2489 | } | |
ef7f3835 KS |
2490 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2491 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2492 | } |
0d1ee42f AR |
2493 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2494 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2495 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2496 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2497 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2498 | printk(KERN_ERR |
8fadc143 | 2499 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2500 | sbi->s_desc_size); |
2501 | goto failed_mount; | |
2502 | } | |
2503 | } else | |
2504 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2505 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2506 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2507 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2508 | goto cantfind_ext4; |
2509 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2510 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2511 | goto cantfind_ext4; |
ac27a0ec DK |
2512 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2513 | sbi->s_inodes_per_block; | |
0d1ee42f | 2514 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2515 | sbi->s_sbh = bh; |
2516 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2517 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2518 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
2b2d6d01 | 2519 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2520 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2521 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2522 | i = le32_to_cpu(es->s_flags); |
2523 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2524 | sbi->s_hash_unsigned = 3; | |
2525 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2526 | #ifdef __CHAR_UNSIGNED__ | |
2527 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2528 | sbi->s_hash_unsigned = 3; | |
2529 | #else | |
2530 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2531 | #endif | |
2532 | sb->s_dirt = 1; | |
2533 | } | |
ac27a0ec DK |
2534 | |
2535 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2536 | printk(KERN_ERR |
2537 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2538 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2539 | goto failed_mount; |
2540 | } | |
ac27a0ec | 2541 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2542 | printk(KERN_ERR |
2543 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2544 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2545 | goto failed_mount; |
2546 | } | |
2547 | ||
bd81d8ee | 2548 | if (ext4_blocks_count(es) > |
ac27a0ec | 2549 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2550 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2551 | " too large to mount safely\n", sb->s_id); |
2552 | if (sizeof(sector_t) < 8) | |
617ba13b | 2553 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2554 | "enabled\n"); |
2555 | goto failed_mount; | |
2556 | } | |
2557 | ||
617ba13b MC |
2558 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2559 | goto cantfind_ext4; | |
e7c95593 | 2560 | |
0f2ddca6 FTN |
2561 | /* check blocks count against device size */ |
2562 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2563 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
2564 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu " | |
2565 | "exceeds size of device (%llu blocks)\n", | |
2566 | ext4_blocks_count(es), blocks_count); | |
2567 | goto failed_mount; | |
2568 | } | |
2569 | ||
4ec11028 TT |
2570 | /* |
2571 | * It makes no sense for the first data block to be beyond the end | |
2572 | * of the filesystem. | |
2573 | */ | |
2574 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
2575 | printk(KERN_WARNING "EXT4-fs: bad geometry: first data" | |
2576 | "block %u is beyond end of filesystem (%llu)\n", | |
2577 | le32_to_cpu(es->s_first_data_block), | |
2578 | ext4_blocks_count(es)); | |
e7c95593 ES |
2579 | goto failed_mount; |
2580 | } | |
bd81d8ee LV |
2581 | blocks_count = (ext4_blocks_count(es) - |
2582 | le32_to_cpu(es->s_first_data_block) + | |
2583 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2584 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 TT |
2585 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
2586 | printk(KERN_WARNING "EXT4-fs: groups count too large: %u " | |
2587 | "(block count %llu, first data block %u, " | |
2588 | "blocks per group %lu)\n", sbi->s_groups_count, | |
2589 | ext4_blocks_count(es), | |
2590 | le32_to_cpu(es->s_first_data_block), | |
2591 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2592 | goto failed_mount; | |
2593 | } | |
bd81d8ee | 2594 | sbi->s_groups_count = blocks_count; |
617ba13b MC |
2595 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2596 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2597 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2598 | GFP_KERNEL); |
2599 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2600 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2601 | goto failed_mount; |
2602 | } | |
2603 | ||
3244fcb1 | 2604 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2605 | if (ext4_proc_root) |
2606 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2607 | #endif |
240799cd | 2608 | |
705895b6 | 2609 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2610 | |
2611 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2612 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2613 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2614 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2615 | printk(KERN_ERR "EXT4-fs: " |
2616 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2617 | db_count = i; |
2618 | goto failed_mount2; | |
2619 | } | |
2620 | } | |
2b2d6d01 | 2621 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2622 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2623 | goto failed_mount2; |
2624 | } | |
772cb7c8 JS |
2625 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2626 | if (!ext4_fill_flex_info(sb)) { | |
2627 | printk(KERN_ERR | |
2628 | "EXT4-fs: unable to initialize " | |
2629 | "flex_bg meta info!\n"); | |
2630 | goto failed_mount2; | |
2631 | } | |
2632 | ||
ac27a0ec DK |
2633 | sbi->s_gdb_count = db_count; |
2634 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2635 | spin_lock_init(&sbi->s_next_gen_lock); | |
2636 | ||
833f4077 PZ |
2637 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2638 | ext4_count_free_blocks(sb)); | |
2639 | if (!err) { | |
2640 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2641 | ext4_count_free_inodes(sb)); | |
2642 | } | |
2643 | if (!err) { | |
2644 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2645 | ext4_count_dirs(sb)); | |
2646 | } | |
6bc6e63f AK |
2647 | if (!err) { |
2648 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2649 | } | |
833f4077 PZ |
2650 | if (err) { |
2651 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2652 | goto failed_mount3; | |
2653 | } | |
ac27a0ec | 2654 | |
c9de560d AT |
2655 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2656 | ||
ac27a0ec DK |
2657 | /* |
2658 | * set up enough so that it can read an inode | |
2659 | */ | |
9ca92389 TT |
2660 | if (!test_opt(sb, NOLOAD) && |
2661 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
2662 | sb->s_op = &ext4_sops; | |
2663 | else | |
2664 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
2665 | sb->s_export_op = &ext4_export_ops; |
2666 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2667 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2668 | sb->s_qcop = &ext4_qctl_operations; |
2669 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2670 | #endif |
2671 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 2672 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 2673 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
2674 | |
2675 | sb->s_root = NULL; | |
2676 | ||
2677 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2678 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2679 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2680 | |
2681 | /* | |
2682 | * The first inode we look at is the journal inode. Don't try | |
2683 | * root first: it may be modified in the journal! | |
2684 | */ | |
2685 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2686 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2687 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2688 | goto failed_mount3; |
624080ed TT |
2689 | if (!(sb->s_flags & MS_RDONLY) && |
2690 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2691 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2692 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2693 | "%u is corrupt\n", sb->s_id, |
624080ed | 2694 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2695 | if (test_opt(sb, ERRORS_RO)) { |
2696 | printk(KERN_CRIT | |
2697 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2698 | sb->s_flags |= MS_RDONLY; |
2699 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2700 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2701 | } | |
2702 | if (test_opt(sb, ERRORS_PANIC)) { | |
2703 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2704 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 2705 | ext4_commit_super(sb, 1); |
624080ed TT |
2706 | goto failed_mount4; |
2707 | } | |
2708 | } | |
0390131b FM |
2709 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2710 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
2711 | printk(KERN_ERR "EXT4-fs: required journal recovery " | |
2712 | "suppressed and not mounted read-only\n"); | |
2713 | goto failed_mount4; | |
ac27a0ec | 2714 | } else { |
0390131b FM |
2715 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2716 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2717 | sbi->s_journal = NULL; | |
2718 | needs_recovery = 0; | |
2719 | goto no_journal; | |
ac27a0ec DK |
2720 | } |
2721 | ||
eb40a09c JS |
2722 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2723 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2724 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
abda1418 | 2725 | printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); |
eb40a09c JS |
2726 | goto failed_mount4; |
2727 | } | |
2728 | ||
818d276c GS |
2729 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2730 | jbd2_journal_set_features(sbi->s_journal, | |
2731 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2732 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2733 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2734 | jbd2_journal_set_features(sbi->s_journal, | |
2735 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2736 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2737 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2738 | } else { | |
2739 | jbd2_journal_clear_features(sbi->s_journal, | |
2740 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2741 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2742 | } | |
2743 | ||
ac27a0ec DK |
2744 | /* We have now updated the journal if required, so we can |
2745 | * validate the data journaling mode. */ | |
2746 | switch (test_opt(sb, DATA_FLAGS)) { | |
2747 | case 0: | |
2748 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2749 | * capabilities: ORDERED_DATA if the journal can |
2750 | * cope, else JOURNAL_DATA | |
2751 | */ | |
dab291af MC |
2752 | if (jbd2_journal_check_available_features |
2753 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2754 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2755 | else | |
2756 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2757 | break; | |
2758 | ||
617ba13b MC |
2759 | case EXT4_MOUNT_ORDERED_DATA: |
2760 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2761 | if (!jbd2_journal_check_available_features |
2762 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2763 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2764 | "requested data journaling mode\n"); |
2765 | goto failed_mount4; | |
2766 | } | |
2767 | default: | |
2768 | break; | |
2769 | } | |
b3881f74 | 2770 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2771 | |
0390131b | 2772 | no_journal: |
ac27a0ec DK |
2773 | |
2774 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2775 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2776 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2777 | "its supported only with writeback mode\n"); |
2778 | clear_opt(sbi->s_mount_opt, NOBH); | |
2779 | } | |
2780 | } | |
2781 | /* | |
dab291af | 2782 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2783 | * so we can safely mount the rest of the filesystem now. |
2784 | */ | |
2785 | ||
1d1fe1ee DH |
2786 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2787 | if (IS_ERR(root)) { | |
617ba13b | 2788 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2789 | ret = PTR_ERR(root); |
ac27a0ec DK |
2790 | goto failed_mount4; |
2791 | } | |
2792 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2793 | iput(root); |
617ba13b | 2794 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2795 | goto failed_mount4; |
2796 | } | |
1d1fe1ee DH |
2797 | sb->s_root = d_alloc_root(root); |
2798 | if (!sb->s_root) { | |
2799 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2800 | iput(root); | |
2801 | ret = -ENOMEM; | |
2802 | goto failed_mount4; | |
2803 | } | |
ac27a0ec | 2804 | |
2b2d6d01 | 2805 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2806 | |
2807 | /* determine the minimum size of new large inodes, if present */ | |
2808 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2809 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2810 | EXT4_GOOD_OLD_INODE_SIZE; | |
2811 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2812 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2813 | if (sbi->s_want_extra_isize < | |
2814 | le16_to_cpu(es->s_want_extra_isize)) | |
2815 | sbi->s_want_extra_isize = | |
2816 | le16_to_cpu(es->s_want_extra_isize); | |
2817 | if (sbi->s_want_extra_isize < | |
2818 | le16_to_cpu(es->s_min_extra_isize)) | |
2819 | sbi->s_want_extra_isize = | |
2820 | le16_to_cpu(es->s_min_extra_isize); | |
2821 | } | |
2822 | } | |
2823 | /* Check if enough inode space is available */ | |
2824 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2825 | sbi->s_inode_size) { | |
2826 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2827 | EXT4_GOOD_OLD_INODE_SIZE; | |
2828 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2829 | "available.\n"); | |
2830 | } | |
2831 | ||
c2774d84 AK |
2832 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2833 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2834 | "requested data journaling mode\n"); | |
2835 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2836 | } else if (test_opt(sb, DELALLOC)) | |
2837 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2838 | ||
6fd058f7 TT |
2839 | err = ext4_setup_system_zone(sb); |
2840 | if (err) { | |
2841 | printk(KERN_ERR "EXT4-fs: failed to initialize system " | |
2842 | "zone (%d)\n", err); | |
2843 | goto failed_mount4; | |
2844 | } | |
2845 | ||
c2774d84 AK |
2846 | ext4_ext_init(sb); |
2847 | err = ext4_mb_init(sb, needs_recovery); | |
2848 | if (err) { | |
2849 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2850 | err); | |
2851 | goto failed_mount4; | |
2852 | } | |
2853 | ||
3197ebdb TT |
2854 | sbi->s_kobj.kset = ext4_kset; |
2855 | init_completion(&sbi->s_kobj_unregister); | |
2856 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
2857 | "%s", sb->s_id); | |
2858 | if (err) { | |
2859 | ext4_mb_release(sb); | |
2860 | ext4_ext_release(sb); | |
2861 | goto failed_mount4; | |
2862 | }; | |
2863 | ||
617ba13b MC |
2864 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2865 | ext4_orphan_cleanup(sb, es); | |
2866 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2867 | if (needs_recovery) { |
2b2d6d01 | 2868 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
0390131b FM |
2869 | ext4_mark_recovery_complete(sb, es); |
2870 | } | |
2871 | if (EXT4_SB(sb)->s_journal) { | |
2872 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2873 | descr = " journalled data mode"; | |
2874 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2875 | descr = " ordered data mode"; | |
2876 | else | |
2877 | descr = " writeback data mode"; | |
2878 | } else | |
2879 | descr = "out journal"; | |
2880 | ||
2881 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", | |
2882 | sb->s_id, descr); | |
ac27a0ec DK |
2883 | |
2884 | lock_kernel(); | |
2885 | return 0; | |
2886 | ||
617ba13b | 2887 | cantfind_ext4: |
ac27a0ec | 2888 | if (!silent) |
617ba13b | 2889 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2890 | sb->s_id); |
2891 | goto failed_mount; | |
2892 | ||
2893 | failed_mount4: | |
0390131b | 2894 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
6fd058f7 | 2895 | ext4_release_system_zone(sb); |
0390131b FM |
2896 | if (sbi->s_journal) { |
2897 | jbd2_journal_destroy(sbi->s_journal); | |
2898 | sbi->s_journal = NULL; | |
2899 | } | |
ac27a0ec | 2900 | failed_mount3: |
c5ca7c76 TT |
2901 | if (sbi->s_flex_groups) { |
2902 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
2903 | vfree(sbi->s_flex_groups); | |
2904 | else | |
2905 | kfree(sbi->s_flex_groups); | |
2906 | } | |
ac27a0ec DK |
2907 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
2908 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2909 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2910 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2911 | failed_mount2: |
2912 | for (i = 0; i < db_count; i++) | |
2913 | brelse(sbi->s_group_desc[i]); | |
2914 | kfree(sbi->s_group_desc); | |
2915 | failed_mount: | |
240799cd | 2916 | if (sbi->s_proc) { |
9f6200bb | 2917 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2918 | } |
ac27a0ec DK |
2919 | #ifdef CONFIG_QUOTA |
2920 | for (i = 0; i < MAXQUOTAS; i++) | |
2921 | kfree(sbi->s_qf_names[i]); | |
2922 | #endif | |
617ba13b | 2923 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2924 | brelse(bh); |
2925 | out_fail: | |
2926 | sb->s_fs_info = NULL; | |
2927 | kfree(sbi); | |
2928 | lock_kernel(); | |
1d1fe1ee | 2929 | return ret; |
ac27a0ec DK |
2930 | } |
2931 | ||
2932 | /* | |
2933 | * Setup any per-fs journal parameters now. We'll do this both on | |
2934 | * initial mount, once the journal has been initialised but before we've | |
2935 | * done any recovery; and again on any subsequent remount. | |
2936 | */ | |
617ba13b | 2937 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2938 | { |
617ba13b | 2939 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2940 | |
30773840 TT |
2941 | journal->j_commit_interval = sbi->s_commit_interval; |
2942 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2943 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2944 | |
2945 | spin_lock(&journal->j_state_lock); | |
2946 | if (test_opt(sb, BARRIER)) | |
dab291af | 2947 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2948 | else |
dab291af | 2949 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2950 | if (test_opt(sb, DATA_ERR_ABORT)) |
2951 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2952 | else | |
2953 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2954 | spin_unlock(&journal->j_state_lock); |
2955 | } | |
2956 | ||
617ba13b | 2957 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2958 | unsigned int journal_inum) |
2959 | { | |
2960 | struct inode *journal_inode; | |
2961 | journal_t *journal; | |
2962 | ||
0390131b FM |
2963 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2964 | ||
ac27a0ec DK |
2965 | /* First, test for the existence of a valid inode on disk. Bad |
2966 | * things happen if we iget() an unused inode, as the subsequent | |
2967 | * iput() will try to delete it. */ | |
2968 | ||
1d1fe1ee DH |
2969 | journal_inode = ext4_iget(sb, journal_inum); |
2970 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2971 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2972 | return NULL; |
2973 | } | |
2974 | if (!journal_inode->i_nlink) { | |
2975 | make_bad_inode(journal_inode); | |
2976 | iput(journal_inode); | |
617ba13b | 2977 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2978 | return NULL; |
2979 | } | |
2980 | ||
e5f8eab8 | 2981 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2982 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2983 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2984 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2985 | iput(journal_inode); |
2986 | return NULL; | |
2987 | } | |
2988 | ||
dab291af | 2989 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2990 | if (!journal) { |
617ba13b | 2991 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2992 | iput(journal_inode); |
2993 | return NULL; | |
2994 | } | |
2995 | journal->j_private = sb; | |
617ba13b | 2996 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2997 | return journal; |
2998 | } | |
2999 | ||
617ba13b | 3000 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3001 | dev_t j_dev) |
3002 | { | |
2b2d6d01 | 3003 | struct buffer_head *bh; |
ac27a0ec | 3004 | journal_t *journal; |
617ba13b MC |
3005 | ext4_fsblk_t start; |
3006 | ext4_fsblk_t len; | |
ac27a0ec | 3007 | int hblock, blocksize; |
617ba13b | 3008 | ext4_fsblk_t sb_block; |
ac27a0ec | 3009 | unsigned long offset; |
2b2d6d01 | 3010 | struct ext4_super_block *es; |
ac27a0ec DK |
3011 | struct block_device *bdev; |
3012 | ||
0390131b FM |
3013 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3014 | ||
617ba13b | 3015 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
3016 | if (bdev == NULL) |
3017 | return NULL; | |
3018 | ||
3019 | if (bd_claim(bdev, sb)) { | |
3020 | printk(KERN_ERR | |
abda1418 | 3021 | "EXT4-fs: failed to claim external journal device.\n"); |
9a1c3542 | 3022 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3023 | return NULL; |
3024 | } | |
3025 | ||
3026 | blocksize = sb->s_blocksize; | |
3027 | hblock = bdev_hardsect_size(bdev); | |
3028 | if (blocksize < hblock) { | |
3029 | printk(KERN_ERR | |
617ba13b | 3030 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
3031 | goto out_bdev; |
3032 | } | |
3033 | ||
617ba13b MC |
3034 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3035 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3036 | set_blocksize(bdev, blocksize); |
3037 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 3038 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
3039 | "external journal\n"); |
3040 | goto out_bdev; | |
3041 | } | |
3042 | ||
617ba13b MC |
3043 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3044 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3045 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
3046 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
3047 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
3048 | "bad superblock\n"); |
3049 | brelse(bh); | |
3050 | goto out_bdev; | |
3051 | } | |
3052 | ||
617ba13b MC |
3053 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
3054 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
3055 | brelse(bh); |
3056 | goto out_bdev; | |
3057 | } | |
3058 | ||
bd81d8ee | 3059 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3060 | start = sb_block + 1; |
3061 | brelse(bh); /* we're done with the superblock */ | |
3062 | ||
dab291af | 3063 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3064 | start, len, blocksize); |
3065 | if (!journal) { | |
617ba13b | 3066 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
3067 | goto out_bdev; |
3068 | } | |
3069 | journal->j_private = sb; | |
3070 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3071 | wait_on_buffer(journal->j_sb_buffer); | |
3072 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 3073 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
3074 | goto out_journal; |
3075 | } | |
3076 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 3077 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
3078 | "user (unsupported) - %d\n", |
3079 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
3080 | goto out_journal; | |
3081 | } | |
617ba13b MC |
3082 | EXT4_SB(sb)->journal_bdev = bdev; |
3083 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
3084 | return journal; |
3085 | out_journal: | |
dab291af | 3086 | jbd2_journal_destroy(journal); |
ac27a0ec | 3087 | out_bdev: |
617ba13b | 3088 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3089 | return NULL; |
3090 | } | |
3091 | ||
617ba13b MC |
3092 | static int ext4_load_journal(struct super_block *sb, |
3093 | struct ext4_super_block *es, | |
ac27a0ec DK |
3094 | unsigned long journal_devnum) |
3095 | { | |
3096 | journal_t *journal; | |
3097 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3098 | dev_t journal_dev; | |
3099 | int err = 0; | |
3100 | int really_read_only; | |
3101 | ||
0390131b FM |
3102 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3103 | ||
ac27a0ec DK |
3104 | if (journal_devnum && |
3105 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 3106 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
3107 | "numbers have changed\n"); |
3108 | journal_dev = new_decode_dev(journal_devnum); | |
3109 | } else | |
3110 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3111 | ||
3112 | really_read_only = bdev_read_only(sb->s_bdev); | |
3113 | ||
3114 | /* | |
3115 | * Are we loading a blank journal or performing recovery after a | |
3116 | * crash? For recovery, we need to check in advance whether we | |
3117 | * can get read-write access to the device. | |
3118 | */ | |
3119 | ||
617ba13b | 3120 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3121 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 3122 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
3123 | "required on readonly filesystem.\n"); |
3124 | if (really_read_only) { | |
617ba13b | 3125 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
3126 | "unavailable, cannot proceed.\n"); |
3127 | return -EROFS; | |
3128 | } | |
2b2d6d01 TT |
3129 | printk(KERN_INFO "EXT4-fs: write access will " |
3130 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
3131 | } |
3132 | } | |
3133 | ||
3134 | if (journal_inum && journal_dev) { | |
617ba13b | 3135 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
3136 | "and inode journals!\n"); |
3137 | return -EINVAL; | |
3138 | } | |
3139 | ||
3140 | if (journal_inum) { | |
617ba13b | 3141 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3142 | return -EINVAL; |
3143 | } else { | |
617ba13b | 3144 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3145 | return -EINVAL; |
3146 | } | |
3147 | ||
4776004f TT |
3148 | if (journal->j_flags & JBD2_BARRIER) |
3149 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
3150 | else | |
3151 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
3152 | ||
ac27a0ec | 3153 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3154 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3155 | if (err) { |
617ba13b | 3156 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 3157 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3158 | return err; |
3159 | } | |
3160 | } | |
3161 | ||
617ba13b | 3162 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3163 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3164 | if (!err) |
dab291af | 3165 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3166 | |
3167 | if (err) { | |
617ba13b | 3168 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 3169 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3170 | return err; |
3171 | } | |
3172 | ||
617ba13b MC |
3173 | EXT4_SB(sb)->s_journal = journal; |
3174 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3175 | |
3176 | if (journal_devnum && | |
3177 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3178 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3179 | |
3180 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3181 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3182 | } |
3183 | ||
3184 | return 0; | |
3185 | } | |
3186 | ||
e2d67052 | 3187 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3188 | { |
e2d67052 | 3189 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3190 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3191 | int error = 0; |
ac27a0ec DK |
3192 | |
3193 | if (!sbh) | |
c4be0c1d | 3194 | return error; |
914258bf TT |
3195 | if (buffer_write_io_error(sbh)) { |
3196 | /* | |
3197 | * Oh, dear. A previous attempt to write the | |
3198 | * superblock failed. This could happen because the | |
3199 | * USB device was yanked out. Or it could happen to | |
3200 | * be a transient write error and maybe the block will | |
3201 | * be remapped. Nothing we can do but to retry the | |
3202 | * write and hope for the best. | |
3203 | */ | |
abda1418 | 3204 | printk(KERN_ERR "EXT4-fs: previous I/O error to " |
914258bf TT |
3205 | "superblock detected for %s.\n", sb->s_id); |
3206 | clear_buffer_write_io_error(sbh); | |
3207 | set_buffer_uptodate(sbh); | |
3208 | } | |
ac27a0ec | 3209 | es->s_wtime = cpu_to_le32(get_seconds()); |
afc32f7e TT |
3210 | es->s_kbytes_written = |
3211 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3212 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3213 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3214 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3215 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3216 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3217 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3218 | sb->s_dirt = 0; |
ac27a0ec DK |
3219 | BUFFER_TRACE(sbh, "marking dirty"); |
3220 | mark_buffer_dirty(sbh); | |
914258bf | 3221 | if (sync) { |
c4be0c1d TS |
3222 | error = sync_dirty_buffer(sbh); |
3223 | if (error) | |
3224 | return error; | |
3225 | ||
3226 | error = buffer_write_io_error(sbh); | |
3227 | if (error) { | |
abda1418 | 3228 | printk(KERN_ERR "EXT4-fs: I/O error while writing " |
914258bf TT |
3229 | "superblock for %s.\n", sb->s_id); |
3230 | clear_buffer_write_io_error(sbh); | |
3231 | set_buffer_uptodate(sbh); | |
3232 | } | |
3233 | } | |
c4be0c1d | 3234 | return error; |
ac27a0ec DK |
3235 | } |
3236 | ||
3237 | ||
3238 | /* | |
3239 | * Have we just finished recovery? If so, and if we are mounting (or | |
3240 | * remounting) the filesystem readonly, then we will end up with a | |
3241 | * consistent fs on disk. Record that fact. | |
3242 | */ | |
2b2d6d01 TT |
3243 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3244 | struct ext4_super_block *es) | |
ac27a0ec | 3245 | { |
617ba13b | 3246 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3247 | |
0390131b FM |
3248 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3249 | BUG_ON(journal != NULL); | |
3250 | return; | |
3251 | } | |
dab291af | 3252 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3253 | if (jbd2_journal_flush(journal) < 0) |
3254 | goto out; | |
3255 | ||
617ba13b | 3256 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3257 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3258 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 3259 | ext4_commit_super(sb, 1); |
ac27a0ec | 3260 | } |
7ffe1ea8 HK |
3261 | |
3262 | out: | |
dab291af | 3263 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3264 | } |
3265 | ||
3266 | /* | |
3267 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3268 | * has recorded an error from a previous lifetime, move that error to the | |
3269 | * main filesystem now. | |
3270 | */ | |
2b2d6d01 TT |
3271 | static void ext4_clear_journal_err(struct super_block *sb, |
3272 | struct ext4_super_block *es) | |
ac27a0ec DK |
3273 | { |
3274 | journal_t *journal; | |
3275 | int j_errno; | |
3276 | const char *errstr; | |
3277 | ||
0390131b FM |
3278 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3279 | ||
617ba13b | 3280 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3281 | |
3282 | /* | |
3283 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3284 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3285 | */ |
3286 | ||
dab291af | 3287 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3288 | if (j_errno) { |
3289 | char nbuf[16]; | |
3290 | ||
617ba13b | 3291 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 3292 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 3293 | "from previous mount: %s", errstr); |
46e665e9 | 3294 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
3295 | "filesystem check."); |
3296 | ||
617ba13b MC |
3297 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3298 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 3299 | ext4_commit_super(sb, 1); |
ac27a0ec | 3300 | |
dab291af | 3301 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3302 | } |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * Force the running and committing transactions to commit, | |
3307 | * and wait on the commit. | |
3308 | */ | |
617ba13b | 3309 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3310 | { |
3311 | journal_t *journal; | |
0390131b | 3312 | int ret = 0; |
ac27a0ec DK |
3313 | |
3314 | if (sb->s_flags & MS_RDONLY) | |
3315 | return 0; | |
3316 | ||
617ba13b | 3317 | journal = EXT4_SB(sb)->s_journal; |
7234ab2a | 3318 | if (journal) |
0390131b | 3319 | ret = ext4_journal_force_commit(journal); |
0390131b | 3320 | |
ac27a0ec DK |
3321 | return ret; |
3322 | } | |
3323 | ||
2b2d6d01 | 3324 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3325 | { |
9ca92389 | 3326 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3327 | } |
3328 | ||
617ba13b | 3329 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3330 | { |
14ce0cb4 | 3331 | int ret = 0; |
9eddacf9 | 3332 | tid_t target; |
ac27a0ec | 3333 | |
ede86cc4 | 3334 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
9ca92389 TT |
3335 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { |
3336 | if (wait) | |
3337 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); | |
0390131b | 3338 | } |
14ce0cb4 | 3339 | return ret; |
ac27a0ec DK |
3340 | } |
3341 | ||
3342 | /* | |
3343 | * LVM calls this function before a (read-only) snapshot is created. This | |
3344 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3345 | */ | |
c4be0c1d | 3346 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3347 | { |
c4be0c1d TS |
3348 | int error = 0; |
3349 | journal_t *journal; | |
ac27a0ec | 3350 | |
9ca92389 TT |
3351 | if (sb->s_flags & MS_RDONLY) |
3352 | return 0; | |
ac27a0ec | 3353 | |
9ca92389 | 3354 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 3355 | |
9ca92389 TT |
3356 | /* Now we set up the journal barrier. */ |
3357 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 3358 | |
9ca92389 TT |
3359 | /* |
3360 | * Don't clear the needs_recovery flag if we failed to flush | |
3361 | * the journal. | |
3362 | */ | |
3363 | error = jbd2_journal_flush(journal); | |
3364 | if (error < 0) { | |
3365 | out: | |
3366 | jbd2_journal_unlock_updates(journal); | |
3367 | return error; | |
ac27a0ec | 3368 | } |
9ca92389 TT |
3369 | |
3370 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
3371 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3372 | error = ext4_commit_super(sb, 1); | |
3373 | if (error) | |
3374 | goto out; | |
c4be0c1d | 3375 | return 0; |
ac27a0ec DK |
3376 | } |
3377 | ||
3378 | /* | |
3379 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3380 | * flag here, even though the filesystem is not technically dirty yet. | |
3381 | */ | |
c4be0c1d | 3382 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3383 | { |
9ca92389 TT |
3384 | if (sb->s_flags & MS_RDONLY) |
3385 | return 0; | |
3386 | ||
3387 | lock_super(sb); | |
3388 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
3389 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3390 | ext4_commit_super(sb, 1); | |
3391 | unlock_super(sb); | |
3392 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
c4be0c1d | 3393 | return 0; |
ac27a0ec DK |
3394 | } |
3395 | ||
2b2d6d01 | 3396 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3397 | { |
2b2d6d01 | 3398 | struct ext4_super_block *es; |
617ba13b MC |
3399 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3400 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3401 | unsigned long old_sb_flags; |
617ba13b | 3402 | struct ext4_mount_options old_opts; |
8a266467 | 3403 | ext4_group_t g; |
b3881f74 | 3404 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3405 | int err; |
3406 | #ifdef CONFIG_QUOTA | |
3407 | int i; | |
3408 | #endif | |
3409 | ||
3410 | /* Store the original options */ | |
3411 | old_sb_flags = sb->s_flags; | |
3412 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3413 | old_opts.s_resuid = sbi->s_resuid; | |
3414 | old_opts.s_resgid = sbi->s_resgid; | |
3415 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3416 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3417 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3418 | #ifdef CONFIG_QUOTA |
3419 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3420 | for (i = 0; i < MAXQUOTAS; i++) | |
3421 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3422 | #endif | |
b3881f74 TT |
3423 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3424 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3425 | |
3426 | /* | |
3427 | * Allow the "check" option to be passed as a remount option. | |
3428 | */ | |
b3881f74 TT |
3429 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3430 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3431 | err = -EINVAL; |
3432 | goto restore_opts; | |
3433 | } | |
3434 | ||
617ba13b | 3435 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 3436 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3437 | |
3438 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3439 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3440 | |
3441 | es = sbi->s_es; | |
3442 | ||
b3881f74 | 3443 | if (sbi->s_journal) { |
0390131b | 3444 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3445 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3446 | } | |
ac27a0ec DK |
3447 | |
3448 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3449 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3450 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3451 | err = -EROFS; |
3452 | goto restore_opts; | |
3453 | } | |
3454 | ||
3455 | if (*flags & MS_RDONLY) { | |
3456 | /* | |
3457 | * First of all, the unconditional stuff we have to do | |
3458 | * to disable replay of the journal when we next remount | |
3459 | */ | |
3460 | sb->s_flags |= MS_RDONLY; | |
3461 | ||
3462 | /* | |
3463 | * OK, test if we are remounting a valid rw partition | |
3464 | * readonly, and if so set the rdonly flag and then | |
3465 | * mark the partition as valid again. | |
3466 | */ | |
617ba13b MC |
3467 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3468 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3469 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3470 | ||
a63c9eb2 | 3471 | if (sbi->s_journal) |
0390131b | 3472 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 3473 | } else { |
3a06d778 | 3474 | int ret; |
617ba13b MC |
3475 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3476 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3477 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec | 3478 | "remount RDWR because of unsupported " |
3a06d778 AK |
3479 | "optional features (%x).\n", sb->s_id, |
3480 | (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & | |
3481 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
3482 | err = -EROFS; |
3483 | goto restore_opts; | |
3484 | } | |
ead6596b | 3485 | |
8a266467 TT |
3486 | /* |
3487 | * Make sure the group descriptor checksums | |
3488 | * are sane. If they aren't, refuse to | |
3489 | * remount r/w. | |
3490 | */ | |
3491 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3492 | struct ext4_group_desc *gdp = | |
3493 | ext4_get_group_desc(sb, g, NULL); | |
3494 | ||
3495 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3496 | printk(KERN_ERR | |
3497 | "EXT4-fs: ext4_remount: " | |
a9df9a49 | 3498 | "Checksum for group %u failed (%u!=%u)\n", |
8a266467 TT |
3499 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3500 | le16_to_cpu(gdp->bg_checksum)); | |
3501 | err = -EINVAL; | |
3502 | goto restore_opts; | |
3503 | } | |
3504 | } | |
3505 | ||
ead6596b ES |
3506 | /* |
3507 | * If we have an unprocessed orphan list hanging | |
3508 | * around from a previously readonly bdev mount, | |
3509 | * require a full umount/remount for now. | |
3510 | */ | |
3511 | if (es->s_last_orphan) { | |
3512 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3513 | "remount RDWR because of unprocessed " | |
3514 | "orphan inode list. Please " | |
3515 | "umount/remount instead.\n", | |
3516 | sb->s_id); | |
3517 | err = -EINVAL; | |
3518 | goto restore_opts; | |
3519 | } | |
3520 | ||
ac27a0ec DK |
3521 | /* |
3522 | * Mounting a RDONLY partition read-write, so reread | |
3523 | * and store the current valid flag. (It may have | |
3524 | * been changed by e2fsck since we originally mounted | |
3525 | * the partition.) | |
3526 | */ | |
0390131b FM |
3527 | if (sbi->s_journal) |
3528 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3529 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3530 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3531 | goto restore_opts; |
2b2d6d01 | 3532 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3533 | sb->s_flags &= ~MS_RDONLY; |
3534 | } | |
3535 | } | |
6fd058f7 | 3536 | ext4_setup_system_zone(sb); |
0390131b | 3537 | if (sbi->s_journal == NULL) |
e2d67052 | 3538 | ext4_commit_super(sb, 1); |
0390131b | 3539 | |
ac27a0ec DK |
3540 | #ifdef CONFIG_QUOTA |
3541 | /* Release old quota file names */ | |
3542 | for (i = 0; i < MAXQUOTAS; i++) | |
3543 | if (old_opts.s_qf_names[i] && | |
3544 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3545 | kfree(old_opts.s_qf_names[i]); | |
3546 | #endif | |
3547 | return 0; | |
3548 | restore_opts: | |
3549 | sb->s_flags = old_sb_flags; | |
3550 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3551 | sbi->s_resuid = old_opts.s_resuid; | |
3552 | sbi->s_resgid = old_opts.s_resgid; | |
3553 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3554 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3555 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3556 | #ifdef CONFIG_QUOTA |
3557 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3558 | for (i = 0; i < MAXQUOTAS; i++) { | |
3559 | if (sbi->s_qf_names[i] && | |
3560 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3561 | kfree(sbi->s_qf_names[i]); | |
3562 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3563 | } | |
3564 | #endif | |
3565 | return err; | |
3566 | } | |
3567 | ||
2b2d6d01 | 3568 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3569 | { |
3570 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3571 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3572 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3573 | u64 fsid; |
ac27a0ec | 3574 | |
5e70030d BP |
3575 | if (test_opt(sb, MINIX_DF)) { |
3576 | sbi->s_overhead_last = 0; | |
6bc9feff | 3577 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 3578 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 3579 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3580 | |
3581 | /* | |
5e70030d BP |
3582 | * Compute the overhead (FS structures). This is constant |
3583 | * for a given filesystem unless the number of block groups | |
3584 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3585 | */ |
3586 | ||
3587 | /* | |
3588 | * All of the blocks before first_data_block are | |
3589 | * overhead | |
3590 | */ | |
3591 | overhead = le32_to_cpu(es->s_first_data_block); | |
3592 | ||
3593 | /* | |
3594 | * Add the overhead attributed to the superblock and | |
3595 | * block group descriptors. If the sparse superblocks | |
3596 | * feature is turned on, then not all groups have this. | |
3597 | */ | |
3598 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3599 | overhead += ext4_bg_has_super(sb, i) + |
3600 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3601 | cond_resched(); |
3602 | } | |
3603 | ||
3604 | /* | |
3605 | * Every block group has an inode bitmap, a block | |
3606 | * bitmap, and an inode table. | |
3607 | */ | |
5e70030d BP |
3608 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3609 | sbi->s_overhead_last = overhead; | |
3610 | smp_wmb(); | |
6bc9feff | 3611 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3612 | } |
3613 | ||
617ba13b | 3614 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3615 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3616 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3617 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3618 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3619 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3620 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3621 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3622 | buf->f_bavail = 0; |
3623 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3624 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3625 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3626 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3627 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3628 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3629 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3630 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3631 | return 0; |
3632 | } | |
3633 | ||
3634 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3635 | * is locked for write. Otherwise the are possible deadlocks: | |
3636 | * Process 1 Process 2 | |
617ba13b | 3637 | * ext4_create() quota_sync() |
a269eb18 JK |
3638 | * jbd2_journal_start() write_dquot() |
3639 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3640 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3641 | * |
3642 | */ | |
3643 | ||
3644 | #ifdef CONFIG_QUOTA | |
3645 | ||
3646 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3647 | { | |
3648 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3649 | } | |
3650 | ||
617ba13b | 3651 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3652 | { |
3653 | int ret, err; | |
3654 | handle_t *handle; | |
3655 | struct inode *inode; | |
3656 | ||
3657 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3658 | handle = ext4_journal_start(inode, |
3659 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3660 | if (IS_ERR(handle)) |
3661 | return PTR_ERR(handle); | |
3662 | ret = dquot_commit(dquot); | |
617ba13b | 3663 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3664 | if (!ret) |
3665 | ret = err; | |
3666 | return ret; | |
3667 | } | |
3668 | ||
617ba13b | 3669 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3670 | { |
3671 | int ret, err; | |
3672 | handle_t *handle; | |
3673 | ||
617ba13b MC |
3674 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3675 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3676 | if (IS_ERR(handle)) |
3677 | return PTR_ERR(handle); | |
3678 | ret = dquot_acquire(dquot); | |
617ba13b | 3679 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3680 | if (!ret) |
3681 | ret = err; | |
3682 | return ret; | |
3683 | } | |
3684 | ||
617ba13b | 3685 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3686 | { |
3687 | int ret, err; | |
3688 | handle_t *handle; | |
3689 | ||
617ba13b MC |
3690 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3691 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3692 | if (IS_ERR(handle)) { |
3693 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3694 | dquot_release(dquot); | |
ac27a0ec | 3695 | return PTR_ERR(handle); |
9c3013e9 | 3696 | } |
ac27a0ec | 3697 | ret = dquot_release(dquot); |
617ba13b | 3698 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3699 | if (!ret) |
3700 | ret = err; | |
3701 | return ret; | |
3702 | } | |
3703 | ||
617ba13b | 3704 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3705 | { |
2c8be6b2 | 3706 | /* Are we journaling quotas? */ |
617ba13b MC |
3707 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3708 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3709 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3710 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3711 | } else { |
3712 | return dquot_mark_dquot_dirty(dquot); | |
3713 | } | |
3714 | } | |
3715 | ||
617ba13b | 3716 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3717 | { |
3718 | int ret, err; | |
3719 | handle_t *handle; | |
3720 | ||
3721 | /* Data block + inode block */ | |
617ba13b | 3722 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3723 | if (IS_ERR(handle)) |
3724 | return PTR_ERR(handle); | |
3725 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3726 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3727 | if (!ret) |
3728 | ret = err; | |
3729 | return ret; | |
3730 | } | |
3731 | ||
3732 | /* | |
3733 | * Turn on quotas during mount time - we need to find | |
3734 | * the quota file and such... | |
3735 | */ | |
617ba13b | 3736 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3737 | { |
617ba13b MC |
3738 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3739 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3740 | } |
3741 | ||
3742 | /* | |
3743 | * Standard function to be called on quota_on | |
3744 | */ | |
617ba13b | 3745 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3746 | char *name, int remount) |
ac27a0ec DK |
3747 | { |
3748 | int err; | |
8264613d | 3749 | struct path path; |
ac27a0ec DK |
3750 | |
3751 | if (!test_opt(sb, QUOTA)) | |
3752 | return -EINVAL; | |
8264613d | 3753 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3754 | if (remount) |
8264613d | 3755 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3756 | |
8264613d | 3757 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3758 | if (err) |
3759 | return err; | |
0623543b | 3760 | |
ac27a0ec | 3761 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3762 | if (path.mnt->mnt_sb != sb) { |
3763 | path_put(&path); | |
ac27a0ec DK |
3764 | return -EXDEV; |
3765 | } | |
0623543b JK |
3766 | /* Journaling quota? */ |
3767 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3768 | /* Quotafile not in fs root? */ |
8264613d | 3769 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3770 | printk(KERN_WARNING |
3771 | "EXT4-fs: Quota file not on filesystem root. " | |
3772 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3773 | } |
0623543b JK |
3774 | |
3775 | /* | |
3776 | * When we journal data on quota file, we have to flush journal to see | |
3777 | * all updates to the file when we bypass pagecache... | |
3778 | */ | |
0390131b FM |
3779 | if (EXT4_SB(sb)->s_journal && |
3780 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3781 | /* |
3782 | * We don't need to lock updates but journal_flush() could | |
3783 | * otherwise be livelocked... | |
3784 | */ | |
3785 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3786 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3787 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3788 | if (err) { |
8264613d | 3789 | path_put(&path); |
7ffe1ea8 HK |
3790 | return err; |
3791 | } | |
0623543b JK |
3792 | } |
3793 | ||
8264613d AV |
3794 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3795 | path_put(&path); | |
77e69dac | 3796 | return err; |
ac27a0ec DK |
3797 | } |
3798 | ||
3799 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3800 | * acquiring the locks... As quota files are never truncated and quota code | |
3801 | * itself serializes the operations (and noone else should touch the files) | |
3802 | * we don't have to be afraid of races */ | |
617ba13b | 3803 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3804 | size_t len, loff_t off) |
3805 | { | |
3806 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3807 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3808 | int err = 0; |
3809 | int offset = off & (sb->s_blocksize - 1); | |
3810 | int tocopy; | |
3811 | size_t toread; | |
3812 | struct buffer_head *bh; | |
3813 | loff_t i_size = i_size_read(inode); | |
3814 | ||
3815 | if (off > i_size) | |
3816 | return 0; | |
3817 | if (off+len > i_size) | |
3818 | len = i_size-off; | |
3819 | toread = len; | |
3820 | while (toread > 0) { | |
3821 | tocopy = sb->s_blocksize - offset < toread ? | |
3822 | sb->s_blocksize - offset : toread; | |
617ba13b | 3823 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3824 | if (err) |
3825 | return err; | |
3826 | if (!bh) /* A hole? */ | |
3827 | memset(data, 0, tocopy); | |
3828 | else | |
3829 | memcpy(data, bh->b_data+offset, tocopy); | |
3830 | brelse(bh); | |
3831 | offset = 0; | |
3832 | toread -= tocopy; | |
3833 | data += tocopy; | |
3834 | blk++; | |
3835 | } | |
3836 | return len; | |
3837 | } | |
3838 | ||
3839 | /* Write to quotafile (we know the transaction is already started and has | |
3840 | * enough credits) */ | |
617ba13b | 3841 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3842 | const char *data, size_t len, loff_t off) |
3843 | { | |
3844 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3845 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3846 | int err = 0; |
3847 | int offset = off & (sb->s_blocksize - 1); | |
3848 | int tocopy; | |
617ba13b | 3849 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3850 | size_t towrite = len; |
3851 | struct buffer_head *bh; | |
3852 | handle_t *handle = journal_current_handle(); | |
3853 | ||
0390131b | 3854 | if (EXT4_SB(sb)->s_journal && !handle) { |
e5f8eab8 | 3855 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3856 | " cancelled because transaction is not started.\n", |
3857 | (unsigned long long)off, (unsigned long long)len); | |
3858 | return -EIO; | |
3859 | } | |
ac27a0ec DK |
3860 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3861 | while (towrite > 0) { | |
3862 | tocopy = sb->s_blocksize - offset < towrite ? | |
3863 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3864 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3865 | if (!bh) |
3866 | goto out; | |
3867 | if (journal_quota) { | |
617ba13b | 3868 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3869 | if (err) { |
3870 | brelse(bh); | |
3871 | goto out; | |
3872 | } | |
3873 | } | |
3874 | lock_buffer(bh); | |
3875 | memcpy(bh->b_data+offset, data, tocopy); | |
3876 | flush_dcache_page(bh->b_page); | |
3877 | unlock_buffer(bh); | |
3878 | if (journal_quota) | |
0390131b | 3879 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3880 | else { |
3881 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3882 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3883 | mark_buffer_dirty(bh); |
3884 | } | |
3885 | brelse(bh); | |
3886 | if (err) | |
3887 | goto out; | |
3888 | offset = 0; | |
3889 | towrite -= tocopy; | |
3890 | data += tocopy; | |
3891 | blk++; | |
3892 | } | |
3893 | out: | |
4d04e4fb JK |
3894 | if (len == towrite) { |
3895 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3896 | return err; |
4d04e4fb | 3897 | } |
ac27a0ec DK |
3898 | if (inode->i_size < off+len-towrite) { |
3899 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3900 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3901 | } |
ac27a0ec | 3902 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3903 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3904 | mutex_unlock(&inode->i_mutex); |
3905 | return len - towrite; | |
3906 | } | |
3907 | ||
3908 | #endif | |
3909 | ||
617ba13b | 3910 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3911 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3912 | { | |
617ba13b | 3913 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3914 | } |
3915 | ||
03010a33 TT |
3916 | static struct file_system_type ext4_fs_type = { |
3917 | .owner = THIS_MODULE, | |
3918 | .name = "ext4", | |
3919 | .get_sb = ext4_get_sb, | |
3920 | .kill_sb = kill_block_super, | |
3921 | .fs_flags = FS_REQUIRES_DEV, | |
3922 | }; | |
3923 | ||
3924 | #ifdef CONFIG_EXT4DEV_COMPAT | |
3925 | static int ext4dev_get_sb(struct file_system_type *fs_type, | |
3926 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
3927 | { | |
3928 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3929 | "to mount using ext4\n"); | |
3930 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3931 | "will go away by 2.6.31\n"); | |
3932 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); | |
3933 | } | |
3934 | ||
617ba13b | 3935 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3936 | .owner = THIS_MODULE, |
617ba13b | 3937 | .name = "ext4dev", |
03010a33 | 3938 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3939 | .kill_sb = kill_block_super, |
3940 | .fs_flags = FS_REQUIRES_DEV, | |
3941 | }; | |
03010a33 TT |
3942 | MODULE_ALIAS("ext4dev"); |
3943 | #endif | |
ac27a0ec | 3944 | |
617ba13b | 3945 | static int __init init_ext4_fs(void) |
ac27a0ec | 3946 | { |
c9de560d AT |
3947 | int err; |
3948 | ||
6fd058f7 TT |
3949 | err = init_ext4_system_zone(); |
3950 | if (err) | |
3951 | return err; | |
3197ebdb TT |
3952 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
3953 | if (!ext4_kset) | |
6fd058f7 | 3954 | goto out4; |
9f6200bb | 3955 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3956 | err = init_ext4_mballoc(); |
ac27a0ec | 3957 | if (err) |
6fd058f7 | 3958 | goto out3; |
c9de560d AT |
3959 | |
3960 | err = init_ext4_xattr(); | |
3961 | if (err) | |
3962 | goto out2; | |
ac27a0ec DK |
3963 | err = init_inodecache(); |
3964 | if (err) | |
3965 | goto out1; | |
03010a33 | 3966 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3967 | if (err) |
3968 | goto out; | |
03010a33 TT |
3969 | #ifdef CONFIG_EXT4DEV_COMPAT |
3970 | err = register_filesystem(&ext4dev_fs_type); | |
3971 | if (err) { | |
3972 | unregister_filesystem(&ext4_fs_type); | |
3973 | goto out; | |
3974 | } | |
3975 | #endif | |
ac27a0ec DK |
3976 | return 0; |
3977 | out: | |
3978 | destroy_inodecache(); | |
3979 | out1: | |
617ba13b | 3980 | exit_ext4_xattr(); |
c9de560d AT |
3981 | out2: |
3982 | exit_ext4_mballoc(); | |
6fd058f7 TT |
3983 | out3: |
3984 | remove_proc_entry("fs/ext4", NULL); | |
3985 | kset_unregister(ext4_kset); | |
3986 | out4: | |
3987 | exit_ext4_system_zone(); | |
ac27a0ec DK |
3988 | return err; |
3989 | } | |
3990 | ||
617ba13b | 3991 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3992 | { |
03010a33 TT |
3993 | unregister_filesystem(&ext4_fs_type); |
3994 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 3995 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 3996 | #endif |
ac27a0ec | 3997 | destroy_inodecache(); |
617ba13b | 3998 | exit_ext4_xattr(); |
c9de560d | 3999 | exit_ext4_mballoc(); |
9f6200bb | 4000 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4001 | kset_unregister(ext4_kset); |
6fd058f7 | 4002 | exit_ext4_system_zone(); |
ac27a0ec DK |
4003 | } |
4004 | ||
4005 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4006 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4007 | MODULE_LICENSE("GPL"); |
617ba13b MC |
4008 | module_init(init_ext4_fs) |
4009 | module_exit(exit_ext4_fs) |