Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/buffer_head.h> | |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
9f6200bb | 38 | #include <linux/proc_fs.h> |
3197ebdb | 39 | #include <linux/ctype.h> |
1330593e | 40 | #include <linux/log2.h> |
717d50e4 | 41 | #include <linux/crc16.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
3dcf5451 CH |
44 | #include "ext4.h" |
45 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
46 | #include "xattr.h" |
47 | #include "acl.h" | |
3661d286 | 48 | #include "mballoc.h" |
ac27a0ec | 49 | |
9bffad1e TT |
50 | #define CREATE_TRACE_POINTS |
51 | #include <trace/events/ext4.h> | |
52 | ||
9f6200bb | 53 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 54 | static struct kset *ext4_kset; |
9f6200bb | 55 | |
617ba13b | 56 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 57 | unsigned long journal_devnum); |
e2d67052 | 58 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
59 | static void ext4_mark_recovery_complete(struct super_block *sb, |
60 | struct ext4_super_block *es); | |
61 | static void ext4_clear_journal_err(struct super_block *sb, | |
62 | struct ext4_super_block *es); | |
617ba13b | 63 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 64 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 65 | char nbuf[16]); |
2b2d6d01 TT |
66 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
67 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 68 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 69 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 70 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 71 | |
bd81d8ee | 72 | |
8fadc143 AR |
73 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
74 | struct ext4_group_desc *bg) | |
bd81d8ee | 75 | { |
3a14589c | 76 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 77 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 78 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
79 | } |
80 | ||
8fadc143 AR |
81 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
82 | struct ext4_group_desc *bg) | |
bd81d8ee | 83 | { |
5272f837 | 84 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 85 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 86 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
87 | } |
88 | ||
8fadc143 AR |
89 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
90 | struct ext4_group_desc *bg) | |
bd81d8ee | 91 | { |
5272f837 | 92 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 93 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 94 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
95 | } |
96 | ||
560671a0 AK |
97 | __u32 ext4_free_blks_count(struct super_block *sb, |
98 | struct ext4_group_desc *bg) | |
99 | { | |
100 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
101 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 102 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
103 | } |
104 | ||
105 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
106 | struct ext4_group_desc *bg) | |
107 | { | |
108 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
109 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 110 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
111 | } |
112 | ||
113 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
114 | struct ext4_group_desc *bg) | |
115 | { | |
116 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
117 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 118 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
119 | } |
120 | ||
121 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
122 | struct ext4_group_desc *bg) | |
123 | { | |
124 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
125 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 126 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
127 | } |
128 | ||
8fadc143 AR |
129 | void ext4_block_bitmap_set(struct super_block *sb, |
130 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 131 | { |
3a14589c | 132 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
133 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
134 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
135 | } |
136 | ||
8fadc143 AR |
137 | void ext4_inode_bitmap_set(struct super_block *sb, |
138 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 139 | { |
5272f837 | 140 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
141 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
142 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
143 | } |
144 | ||
8fadc143 AR |
145 | void ext4_inode_table_set(struct super_block *sb, |
146 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 147 | { |
5272f837 | 148 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
149 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
150 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
151 | } |
152 | ||
560671a0 AK |
153 | void ext4_free_blks_set(struct super_block *sb, |
154 | struct ext4_group_desc *bg, __u32 count) | |
155 | { | |
156 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
157 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
158 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
159 | } | |
160 | ||
161 | void ext4_free_inodes_set(struct super_block *sb, | |
162 | struct ext4_group_desc *bg, __u32 count) | |
163 | { | |
164 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
165 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
166 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
167 | } | |
168 | ||
169 | void ext4_used_dirs_set(struct super_block *sb, | |
170 | struct ext4_group_desc *bg, __u32 count) | |
171 | { | |
172 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
173 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
174 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
175 | } | |
176 | ||
177 | void ext4_itable_unused_set(struct super_block *sb, | |
178 | struct ext4_group_desc *bg, __u32 count) | |
179 | { | |
180 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
181 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
182 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
183 | } | |
184 | ||
d3d1faf6 CW |
185 | |
186 | /* Just increment the non-pointer handle value */ | |
187 | static handle_t *ext4_get_nojournal(void) | |
188 | { | |
189 | handle_t *handle = current->journal_info; | |
190 | unsigned long ref_cnt = (unsigned long)handle; | |
191 | ||
192 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
193 | ||
194 | ref_cnt++; | |
195 | handle = (handle_t *)ref_cnt; | |
196 | ||
197 | current->journal_info = handle; | |
198 | return handle; | |
199 | } | |
200 | ||
201 | ||
202 | /* Decrement the non-pointer handle value */ | |
203 | static void ext4_put_nojournal(handle_t *handle) | |
204 | { | |
205 | unsigned long ref_cnt = (unsigned long)handle; | |
206 | ||
207 | BUG_ON(ref_cnt == 0); | |
208 | ||
209 | ref_cnt--; | |
210 | handle = (handle_t *)ref_cnt; | |
211 | ||
212 | current->journal_info = handle; | |
213 | } | |
214 | ||
ac27a0ec | 215 | /* |
dab291af | 216 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
217 | * |
218 | * The only special thing we need to do here is to make sure that all | |
219 | * journal_end calls result in the superblock being marked dirty, so | |
220 | * that sync() will call the filesystem's write_super callback if | |
221 | * appropriate. | |
222 | */ | |
617ba13b | 223 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
224 | { |
225 | journal_t *journal; | |
226 | ||
227 | if (sb->s_flags & MS_RDONLY) | |
228 | return ERR_PTR(-EROFS); | |
229 | ||
230 | /* Special case here: if the journal has aborted behind our | |
231 | * backs (eg. EIO in the commit thread), then we still need to | |
232 | * take the FS itself readonly cleanly. */ | |
617ba13b | 233 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
234 | if (journal) { |
235 | if (is_journal_aborted(journal)) { | |
0b8e58a1 | 236 | ext4_abort(sb, __func__, "Detected aborted journal"); |
0390131b FM |
237 | return ERR_PTR(-EROFS); |
238 | } | |
239 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 240 | } |
d3d1faf6 | 241 | return ext4_get_nojournal(); |
ac27a0ec DK |
242 | } |
243 | ||
244 | /* | |
245 | * The only special thing we need to do here is to make sure that all | |
dab291af | 246 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
247 | * that sync() will call the filesystem's write_super callback if |
248 | * appropriate. | |
249 | */ | |
617ba13b | 250 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
251 | { |
252 | struct super_block *sb; | |
253 | int err; | |
254 | int rc; | |
255 | ||
0390131b | 256 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 257 | ext4_put_nojournal(handle); |
0390131b FM |
258 | return 0; |
259 | } | |
ac27a0ec DK |
260 | sb = handle->h_transaction->t_journal->j_private; |
261 | err = handle->h_err; | |
dab291af | 262 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
263 | |
264 | if (!err) | |
265 | err = rc; | |
266 | if (err) | |
617ba13b | 267 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
268 | return err; |
269 | } | |
270 | ||
617ba13b | 271 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
272 | struct buffer_head *bh, handle_t *handle, int err) |
273 | { | |
274 | char nbuf[16]; | |
617ba13b | 275 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 276 | |
0390131b FM |
277 | BUG_ON(!ext4_handle_valid(handle)); |
278 | ||
ac27a0ec DK |
279 | if (bh) |
280 | BUFFER_TRACE(bh, "abort"); | |
281 | ||
282 | if (!handle->h_err) | |
283 | handle->h_err = err; | |
284 | ||
285 | if (is_handle_aborted(handle)) | |
286 | return; | |
287 | ||
288 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
289 | caller, errstr, err_fn); | |
290 | ||
dab291af | 291 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
292 | } |
293 | ||
294 | /* Deal with the reporting of failure conditions on a filesystem such as | |
295 | * inconsistencies detected or read IO failures. | |
296 | * | |
297 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 298 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
299 | * write ordering constraints on the superblock which prevent us from |
300 | * writing it out straight away; and given that the journal is about to | |
301 | * be aborted, we can't rely on the current, or future, transactions to | |
302 | * write out the superblock safely. | |
303 | * | |
dab291af | 304 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
305 | * the journal instead. On recovery, the journal will compain about |
306 | * that error until we've noted it down and cleared it. | |
307 | */ | |
308 | ||
617ba13b | 309 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 310 | { |
617ba13b | 311 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 312 | |
617ba13b MC |
313 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
314 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
315 | |
316 | if (sb->s_flags & MS_RDONLY) | |
317 | return; | |
318 | ||
2b2d6d01 | 319 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 320 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 321 | |
4ab2f15b | 322 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 323 | if (journal) |
dab291af | 324 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 325 | } |
2b2d6d01 | 326 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 327 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
328 | sb->s_flags |= MS_RDONLY; |
329 | } | |
e2d67052 | 330 | ext4_commit_super(sb, 1); |
ac27a0ec | 331 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 332 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
333 | sb->s_id); |
334 | } | |
335 | ||
2b2d6d01 TT |
336 | void ext4_error(struct super_block *sb, const char *function, |
337 | const char *fmt, ...) | |
ac27a0ec DK |
338 | { |
339 | va_list args; | |
340 | ||
341 | va_start(args, fmt); | |
2b2d6d01 | 342 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
343 | vprintk(fmt, args); |
344 | printk("\n"); | |
345 | va_end(args); | |
346 | ||
617ba13b | 347 | ext4_handle_error(sb); |
ac27a0ec DK |
348 | } |
349 | ||
2b2d6d01 | 350 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
351 | char nbuf[16]) |
352 | { | |
353 | char *errstr = NULL; | |
354 | ||
355 | switch (errno) { | |
356 | case -EIO: | |
357 | errstr = "IO failure"; | |
358 | break; | |
359 | case -ENOMEM: | |
360 | errstr = "Out of memory"; | |
361 | break; | |
362 | case -EROFS: | |
78f1ddbb TT |
363 | if (!sb || (EXT4_SB(sb)->s_journal && |
364 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
365 | errstr = "Journal has aborted"; |
366 | else | |
367 | errstr = "Readonly filesystem"; | |
368 | break; | |
369 | default: | |
370 | /* If the caller passed in an extra buffer for unknown | |
371 | * errors, textualise them now. Else we just return | |
372 | * NULL. */ | |
373 | if (nbuf) { | |
374 | /* Check for truncated error codes... */ | |
375 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
376 | errstr = nbuf; | |
377 | } | |
378 | break; | |
379 | } | |
380 | ||
381 | return errstr; | |
382 | } | |
383 | ||
617ba13b | 384 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
385 | * automatically and invokes the appropriate error response. */ |
386 | ||
2b2d6d01 | 387 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
388 | { |
389 | char nbuf[16]; | |
390 | const char *errstr; | |
391 | ||
392 | /* Special case: if the error is EROFS, and we're not already | |
393 | * inside a transaction, then there's really no point in logging | |
394 | * an error. */ | |
395 | if (errno == -EROFS && journal_current_handle() == NULL && | |
396 | (sb->s_flags & MS_RDONLY)) | |
397 | return; | |
398 | ||
617ba13b | 399 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
400 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
401 | sb->s_id, function, errstr); | |
ac27a0ec | 402 | |
617ba13b | 403 | ext4_handle_error(sb); |
ac27a0ec DK |
404 | } |
405 | ||
406 | /* | |
617ba13b | 407 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
408 | * abort function may be used to deal with unrecoverable failures such |
409 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
410 | * | |
411 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
412 | * unless the error response on the fs has been set to panic in which | |
413 | * case we take the easy way out and panic immediately. | |
414 | */ | |
415 | ||
2b2d6d01 TT |
416 | void ext4_abort(struct super_block *sb, const char *function, |
417 | const char *fmt, ...) | |
ac27a0ec DK |
418 | { |
419 | va_list args; | |
420 | ||
ac27a0ec | 421 | va_start(args, fmt); |
2b2d6d01 | 422 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
423 | vprintk(fmt, args); |
424 | printk("\n"); | |
425 | va_end(args); | |
426 | ||
427 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 428 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
429 | |
430 | if (sb->s_flags & MS_RDONLY) | |
431 | return; | |
432 | ||
b31e1552 | 433 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
617ba13b | 434 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 435 | sb->s_flags |= MS_RDONLY; |
4ab2f15b | 436 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ef2cabf7 HK |
437 | if (EXT4_SB(sb)->s_journal) |
438 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
439 | } |
440 | ||
b31e1552 ES |
441 | void ext4_msg (struct super_block * sb, const char *prefix, |
442 | const char *fmt, ...) | |
443 | { | |
444 | va_list args; | |
445 | ||
446 | va_start(args, fmt); | |
447 | printk("%sEXT4-fs (%s): ", prefix, sb->s_id); | |
448 | vprintk(fmt, args); | |
449 | printk("\n"); | |
450 | va_end(args); | |
451 | } | |
452 | ||
2b2d6d01 TT |
453 | void ext4_warning(struct super_block *sb, const char *function, |
454 | const char *fmt, ...) | |
ac27a0ec DK |
455 | { |
456 | va_list args; | |
457 | ||
458 | va_start(args, fmt); | |
617ba13b | 459 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
460 | sb->s_id, function); |
461 | vprintk(fmt, args); | |
462 | printk("\n"); | |
463 | va_end(args); | |
464 | } | |
465 | ||
5d1b1b3f | 466 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
0b8e58a1 | 467 | const char *function, const char *fmt, ...) |
5d1b1b3f AK |
468 | __releases(bitlock) |
469 | __acquires(bitlock) | |
470 | { | |
471 | va_list args; | |
472 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
473 | ||
474 | va_start(args, fmt); | |
475 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
476 | vprintk(fmt, args); | |
477 | printk("\n"); | |
478 | va_end(args); | |
479 | ||
480 | if (test_opt(sb, ERRORS_CONT)) { | |
481 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
482 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 483 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
484 | return; |
485 | } | |
486 | ext4_unlock_group(sb, grp); | |
487 | ext4_handle_error(sb); | |
488 | /* | |
489 | * We only get here in the ERRORS_RO case; relocking the group | |
490 | * may be dangerous, but nothing bad will happen since the | |
491 | * filesystem will have already been marked read/only and the | |
492 | * journal has been aborted. We return 1 as a hint to callers | |
493 | * who might what to use the return value from | |
494 | * ext4_grp_locked_error() to distinguish beween the | |
495 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
496 | * aggressively from the ext4 function in question, with a | |
497 | * more appropriate error code. | |
498 | */ | |
499 | ext4_lock_group(sb, grp); | |
500 | return; | |
501 | } | |
502 | ||
617ba13b | 503 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 504 | { |
617ba13b | 505 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 506 | |
617ba13b | 507 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
508 | return; |
509 | ||
46e665e9 | 510 | ext4_warning(sb, __func__, |
ac27a0ec DK |
511 | "updating to rev %d because of new feature flag, " |
512 | "running e2fsck is recommended", | |
617ba13b | 513 | EXT4_DYNAMIC_REV); |
ac27a0ec | 514 | |
617ba13b MC |
515 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
516 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
517 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
518 | /* leave es->s_feature_*compat flags alone */ |
519 | /* es->s_uuid will be set by e2fsck if empty */ | |
520 | ||
521 | /* | |
522 | * The rest of the superblock fields should be zero, and if not it | |
523 | * means they are likely already in use, so leave them alone. We | |
524 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
525 | */ | |
526 | } | |
527 | ||
528 | /* | |
529 | * Open the external journal device | |
530 | */ | |
b31e1552 | 531 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
532 | { |
533 | struct block_device *bdev; | |
534 | char b[BDEVNAME_SIZE]; | |
535 | ||
536 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
537 | if (IS_ERR(bdev)) | |
538 | goto fail; | |
539 | return bdev; | |
540 | ||
541 | fail: | |
b31e1552 | 542 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
543 | __bdevname(dev, b), PTR_ERR(bdev)); |
544 | return NULL; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Release the journal device | |
549 | */ | |
617ba13b | 550 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
551 | { |
552 | bd_release(bdev); | |
9a1c3542 | 553 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
554 | } |
555 | ||
617ba13b | 556 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
557 | { |
558 | struct block_device *bdev; | |
559 | int ret = -ENODEV; | |
560 | ||
561 | bdev = sbi->journal_bdev; | |
562 | if (bdev) { | |
617ba13b | 563 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
564 | sbi->journal_bdev = NULL; |
565 | } | |
566 | return ret; | |
567 | } | |
568 | ||
569 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
570 | { | |
617ba13b | 571 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
572 | } |
573 | ||
617ba13b | 574 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
575 | { |
576 | struct list_head *l; | |
577 | ||
b31e1552 ES |
578 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
579 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
580 | |
581 | printk(KERN_ERR "sb_info orphan list:\n"); | |
582 | list_for_each(l, &sbi->s_orphan) { | |
583 | struct inode *inode = orphan_list_entry(l); | |
584 | printk(KERN_ERR " " | |
585 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
586 | inode->i_sb->s_id, inode->i_ino, inode, | |
587 | inode->i_mode, inode->i_nlink, | |
588 | NEXT_ORPHAN(inode)); | |
589 | } | |
590 | } | |
591 | ||
2b2d6d01 | 592 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 593 | { |
617ba13b MC |
594 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
595 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 596 | int i, err; |
ac27a0ec | 597 | |
4c0425ff MC |
598 | flush_workqueue(sbi->dio_unwritten_wq); |
599 | destroy_workqueue(sbi->dio_unwritten_wq); | |
600 | ||
a9e220f8 | 601 | lock_super(sb); |
6cfd0148 | 602 | lock_kernel(); |
8c85e125 | 603 | if (sb->s_dirt) |
ebc1ac16 | 604 | ext4_commit_super(sb, 1); |
8c85e125 | 605 | |
6fd058f7 | 606 | ext4_release_system_zone(sb); |
c9de560d | 607 | ext4_mb_release(sb); |
a86c6181 | 608 | ext4_ext_release(sb); |
617ba13b | 609 | ext4_xattr_put_super(sb); |
0390131b FM |
610 | if (sbi->s_journal) { |
611 | err = jbd2_journal_destroy(sbi->s_journal); | |
612 | sbi->s_journal = NULL; | |
613 | if (err < 0) | |
614 | ext4_abort(sb, __func__, | |
615 | "Couldn't clean up the journal"); | |
616 | } | |
ac27a0ec | 617 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 618 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 619 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 620 | ext4_commit_super(sb, 1); |
ac27a0ec | 621 | } |
240799cd | 622 | if (sbi->s_proc) { |
9f6200bb | 623 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 624 | } |
3197ebdb | 625 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
626 | |
627 | for (i = 0; i < sbi->s_gdb_count; i++) | |
628 | brelse(sbi->s_group_desc[i]); | |
629 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
630 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
631 | vfree(sbi->s_flex_groups); | |
632 | else | |
633 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
634 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
635 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
636 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 637 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
638 | brelse(sbi->s_sbh); |
639 | #ifdef CONFIG_QUOTA | |
640 | for (i = 0; i < MAXQUOTAS; i++) | |
641 | kfree(sbi->s_qf_names[i]); | |
642 | #endif | |
643 | ||
644 | /* Debugging code just in case the in-memory inode orphan list | |
645 | * isn't empty. The on-disk one can be non-empty if we've | |
646 | * detected an error and taken the fs readonly, but the | |
647 | * in-memory list had better be clean by this point. */ | |
648 | if (!list_empty(&sbi->s_orphan)) | |
649 | dump_orphan_list(sb, sbi); | |
650 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
651 | ||
f98393a6 | 652 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
653 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
654 | /* | |
655 | * Invalidate the journal device's buffers. We don't want them | |
656 | * floating about in memory - the physical journal device may | |
657 | * hotswapped, and it breaks the `ro-after' testing code. | |
658 | */ | |
659 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 660 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 661 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
662 | } |
663 | sb->s_fs_info = NULL; | |
3197ebdb TT |
664 | /* |
665 | * Now that we are completely done shutting down the | |
666 | * superblock, we need to actually destroy the kobject. | |
667 | */ | |
668 | unlock_kernel(); | |
669 | unlock_super(sb); | |
670 | kobject_put(&sbi->s_kobj); | |
671 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 672 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 673 | kfree(sbi); |
ac27a0ec DK |
674 | } |
675 | ||
e18b890b | 676 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
677 | |
678 | /* | |
679 | * Called inside transaction, so use GFP_NOFS | |
680 | */ | |
617ba13b | 681 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 682 | { |
617ba13b | 683 | struct ext4_inode_info *ei; |
ac27a0ec | 684 | |
e6b4f8da | 685 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
686 | if (!ei) |
687 | return NULL; | |
0b8e58a1 | 688 | |
ac27a0ec | 689 | ei->vfs_inode.i_version = 1; |
91246c00 | 690 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 691 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
692 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
693 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
694 | /* |
695 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
696 | * therefore it can be null here. Don't check it, just initialize | |
697 | * jinode. | |
698 | */ | |
678aaf48 | 699 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
700 | ei->i_reserved_data_blocks = 0; |
701 | ei->i_reserved_meta_blocks = 0; | |
702 | ei->i_allocated_meta_blocks = 0; | |
703 | ei->i_delalloc_reserved_flag = 0; | |
704 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
8d5d02e6 MC |
705 | INIT_LIST_HEAD(&ei->i_aio_dio_complete_list); |
706 | ei->cur_aio_dio = NULL; | |
0b8e58a1 | 707 | |
ac27a0ec DK |
708 | return &ei->vfs_inode; |
709 | } | |
710 | ||
617ba13b | 711 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 712 | { |
9f7dd93d | 713 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
714 | ext4_msg(inode->i_sb, KERN_ERR, |
715 | "Inode %lu (%p): orphan list check failed!", | |
716 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
717 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
718 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
719 | true); | |
720 | dump_stack(); | |
721 | } | |
617ba13b | 722 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
723 | } |
724 | ||
51cc5068 | 725 | static void init_once(void *foo) |
ac27a0ec | 726 | { |
617ba13b | 727 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 728 | |
a35afb83 | 729 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 730 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 731 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 732 | #endif |
0e855ac8 | 733 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 734 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
735 | } |
736 | ||
737 | static int init_inodecache(void) | |
738 | { | |
617ba13b MC |
739 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
740 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
741 | 0, (SLAB_RECLAIM_ACCOUNT| |
742 | SLAB_MEM_SPREAD), | |
20c2df83 | 743 | init_once); |
617ba13b | 744 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
745 | return -ENOMEM; |
746 | return 0; | |
747 | } | |
748 | ||
749 | static void destroy_inodecache(void) | |
750 | { | |
617ba13b | 751 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
752 | } |
753 | ||
617ba13b | 754 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 755 | { |
c2ea3fde | 756 | ext4_discard_preallocations(inode); |
0390131b FM |
757 | if (EXT4_JOURNAL(inode)) |
758 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 759 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
760 | } |
761 | ||
2b2d6d01 TT |
762 | static inline void ext4_show_quota_options(struct seq_file *seq, |
763 | struct super_block *sb) | |
ac27a0ec DK |
764 | { |
765 | #if defined(CONFIG_QUOTA) | |
617ba13b | 766 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
767 | |
768 | if (sbi->s_jquota_fmt) | |
769 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 770 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
771 | |
772 | if (sbi->s_qf_names[USRQUOTA]) | |
773 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
774 | ||
775 | if (sbi->s_qf_names[GRPQUOTA]) | |
776 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
777 | ||
617ba13b | 778 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
779 | seq_puts(seq, ",usrquota"); |
780 | ||
617ba13b | 781 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
782 | seq_puts(seq, ",grpquota"); |
783 | #endif | |
784 | } | |
785 | ||
d9c9bef1 MS |
786 | /* |
787 | * Show an option if | |
788 | * - it's set to a non-default value OR | |
789 | * - if the per-sb default is different from the global default | |
790 | */ | |
617ba13b | 791 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 792 | { |
aa22df2c AK |
793 | int def_errors; |
794 | unsigned long def_mount_opts; | |
ac27a0ec | 795 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
796 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
797 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
798 | |
799 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 800 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
801 | |
802 | if (sbi->s_sb_block != 1) | |
803 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
804 | if (test_opt(sb, MINIX_DF)) | |
805 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 806 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
807 | seq_puts(seq, ",grpid"); |
808 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
809 | seq_puts(seq, ",nogrpid"); | |
810 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
811 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
812 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
813 | } | |
814 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
815 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
816 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
817 | } | |
bb4f397a | 818 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 819 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
820 | def_errors == EXT4_ERRORS_CONTINUE) { |
821 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
822 | } |
823 | } | |
aa22df2c | 824 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 825 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 826 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 827 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 828 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 829 | seq_puts(seq, ",nouid32"); |
aa22df2c | 830 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
831 | seq_puts(seq, ",debug"); |
832 | if (test_opt(sb, OLDALLOC)) | |
833 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 834 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
835 | if (test_opt(sb, XATTR_USER) && |
836 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
837 | seq_puts(seq, ",user_xattr"); |
838 | if (!test_opt(sb, XATTR_USER) && | |
839 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
840 | seq_puts(seq, ",nouser_xattr"); | |
841 | } | |
842 | #endif | |
03010a33 | 843 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 844 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
845 | seq_puts(seq, ",acl"); |
846 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
847 | seq_puts(seq, ",noacl"); | |
848 | #endif | |
30773840 | 849 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
850 | seq_printf(seq, ",commit=%u", |
851 | (unsigned) (sbi->s_commit_interval / HZ)); | |
852 | } | |
30773840 TT |
853 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
854 | seq_printf(seq, ",min_batch_time=%u", | |
855 | (unsigned) sbi->s_min_batch_time); | |
856 | } | |
857 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
858 | seq_printf(seq, ",max_batch_time=%u", | |
859 | (unsigned) sbi->s_min_batch_time); | |
860 | } | |
861 | ||
571640ca ES |
862 | /* |
863 | * We're changing the default of barrier mount option, so | |
864 | * let's always display its mount state so it's clear what its | |
865 | * status is. | |
866 | */ | |
867 | seq_puts(seq, ",barrier="); | |
868 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
869 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
870 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
871 | if (test_opt(sb, NOBH)) |
872 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
873 | if (test_opt(sb, I_VERSION)) |
874 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
875 | if (!test_opt(sb, DELALLOC)) |
876 | seq_puts(seq, ",nodelalloc"); | |
877 | ||
ac27a0ec | 878 | |
cb45bbe4 MS |
879 | if (sbi->s_stripe) |
880 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
881 | /* |
882 | * journal mode get enabled in different ways | |
883 | * So just print the value even if we didn't specify it | |
884 | */ | |
617ba13b | 885 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 886 | seq_puts(seq, ",data=journal"); |
617ba13b | 887 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 888 | seq_puts(seq, ",data=ordered"); |
617ba13b | 889 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
890 | seq_puts(seq, ",data=writeback"); |
891 | ||
240799cd TT |
892 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
893 | seq_printf(seq, ",inode_readahead_blks=%u", | |
894 | sbi->s_inode_readahead_blks); | |
895 | ||
5bf5683a HK |
896 | if (test_opt(sb, DATA_ERR_ABORT)) |
897 | seq_puts(seq, ",data_err=abort"); | |
898 | ||
afd4672d | 899 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 900 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 901 | |
617ba13b | 902 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 903 | |
ac27a0ec DK |
904 | return 0; |
905 | } | |
906 | ||
1b961ac0 | 907 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 908 | u64 ino, u32 generation) |
ac27a0ec | 909 | { |
ac27a0ec | 910 | struct inode *inode; |
ac27a0ec | 911 | |
617ba13b | 912 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 913 | return ERR_PTR(-ESTALE); |
617ba13b | 914 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
915 | return ERR_PTR(-ESTALE); |
916 | ||
917 | /* iget isn't really right if the inode is currently unallocated!! | |
918 | * | |
617ba13b | 919 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
920 | * deleted, so we should be safe. |
921 | * | |
922 | * Currently we don't know the generation for parent directory, so | |
923 | * a generation of 0 means "accept any" | |
924 | */ | |
1d1fe1ee DH |
925 | inode = ext4_iget(sb, ino); |
926 | if (IS_ERR(inode)) | |
927 | return ERR_CAST(inode); | |
928 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
929 | iput(inode); |
930 | return ERR_PTR(-ESTALE); | |
931 | } | |
1b961ac0 CH |
932 | |
933 | return inode; | |
934 | } | |
935 | ||
936 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 937 | int fh_len, int fh_type) |
1b961ac0 CH |
938 | { |
939 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
940 | ext4_nfs_get_inode); | |
941 | } | |
942 | ||
943 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 944 | int fh_len, int fh_type) |
1b961ac0 CH |
945 | { |
946 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
947 | ext4_nfs_get_inode); | |
ac27a0ec DK |
948 | } |
949 | ||
c39a7f84 TO |
950 | /* |
951 | * Try to release metadata pages (indirect blocks, directories) which are | |
952 | * mapped via the block device. Since these pages could have journal heads | |
953 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
954 | * jbd2 layer's try_to_free_buffers() function to release them. | |
955 | */ | |
0b8e58a1 AD |
956 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
957 | gfp_t wait) | |
c39a7f84 TO |
958 | { |
959 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
960 | ||
961 | WARN_ON(PageChecked(page)); | |
962 | if (!page_has_buffers(page)) | |
963 | return 0; | |
964 | if (journal) | |
965 | return jbd2_journal_try_to_free_buffers(journal, page, | |
966 | wait & ~__GFP_WAIT); | |
967 | return try_to_free_buffers(page); | |
968 | } | |
969 | ||
ac27a0ec | 970 | #ifdef CONFIG_QUOTA |
af5bc92d | 971 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 972 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 973 | |
617ba13b MC |
974 | static int ext4_write_dquot(struct dquot *dquot); |
975 | static int ext4_acquire_dquot(struct dquot *dquot); | |
976 | static int ext4_release_dquot(struct dquot *dquot); | |
977 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
978 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
979 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
980 | char *path, int remount); | |
617ba13b MC |
981 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
982 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 983 | size_t len, loff_t off); |
617ba13b | 984 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
985 | const char *data, size_t len, loff_t off); |
986 | ||
61e225dc | 987 | static const struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
988 | .initialize = dquot_initialize, |
989 | .drop = dquot_drop, | |
ac27a0ec | 990 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
991 | .reserve_space = dquot_reserve_space, |
992 | .claim_space = dquot_claim_space, | |
993 | .release_rsv = dquot_release_reserved_space, | |
994 | .get_reserved_space = ext4_get_reserved_space, | |
ac27a0ec DK |
995 | .alloc_inode = dquot_alloc_inode, |
996 | .free_space = dquot_free_space, | |
997 | .free_inode = dquot_free_inode, | |
998 | .transfer = dquot_transfer, | |
617ba13b MC |
999 | .write_dquot = ext4_write_dquot, |
1000 | .acquire_dquot = ext4_acquire_dquot, | |
1001 | .release_dquot = ext4_release_dquot, | |
1002 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1003 | .write_info = ext4_write_info, |
1004 | .alloc_dquot = dquot_alloc, | |
1005 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1006 | }; |
1007 | ||
0d54b217 | 1008 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1009 | .quota_on = ext4_quota_on, |
ac27a0ec DK |
1010 | .quota_off = vfs_quota_off, |
1011 | .quota_sync = vfs_quota_sync, | |
1012 | .get_info = vfs_get_dqinfo, | |
1013 | .set_info = vfs_set_dqinfo, | |
1014 | .get_dqblk = vfs_get_dqblk, | |
1015 | .set_dqblk = vfs_set_dqblk | |
1016 | }; | |
1017 | #endif | |
1018 | ||
ee9b6d61 | 1019 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1020 | .alloc_inode = ext4_alloc_inode, |
1021 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1022 | .write_inode = ext4_write_inode, |
1023 | .dirty_inode = ext4_dirty_inode, | |
1024 | .delete_inode = ext4_delete_inode, | |
1025 | .put_super = ext4_put_super, | |
617ba13b | 1026 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1027 | .freeze_fs = ext4_freeze, |
1028 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1029 | .statfs = ext4_statfs, |
1030 | .remount_fs = ext4_remount, | |
1031 | .clear_inode = ext4_clear_inode, | |
1032 | .show_options = ext4_show_options, | |
ac27a0ec | 1033 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1034 | .quota_read = ext4_quota_read, |
1035 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1036 | #endif |
c39a7f84 | 1037 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1038 | }; |
1039 | ||
9ca92389 TT |
1040 | static const struct super_operations ext4_nojournal_sops = { |
1041 | .alloc_inode = ext4_alloc_inode, | |
1042 | .destroy_inode = ext4_destroy_inode, | |
1043 | .write_inode = ext4_write_inode, | |
1044 | .dirty_inode = ext4_dirty_inode, | |
1045 | .delete_inode = ext4_delete_inode, | |
1046 | .write_super = ext4_write_super, | |
1047 | .put_super = ext4_put_super, | |
1048 | .statfs = ext4_statfs, | |
1049 | .remount_fs = ext4_remount, | |
1050 | .clear_inode = ext4_clear_inode, | |
1051 | .show_options = ext4_show_options, | |
1052 | #ifdef CONFIG_QUOTA | |
1053 | .quota_read = ext4_quota_read, | |
1054 | .quota_write = ext4_quota_write, | |
1055 | #endif | |
1056 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1057 | }; | |
1058 | ||
39655164 | 1059 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1060 | .fh_to_dentry = ext4_fh_to_dentry, |
1061 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1062 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1063 | }; |
1064 | ||
1065 | enum { | |
1066 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1067 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1068 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1069 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1070 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1071 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1072 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1073 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1074 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1075 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec DK |
1076 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1077 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
06705bff TT |
1078 | Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, |
1079 | Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1080 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1081 | Opt_block_validity, Opt_noblock_validity, |
b3881f74 | 1082 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1083 | }; |
1084 | ||
a447c093 | 1085 | static const match_table_t tokens = { |
ac27a0ec DK |
1086 | {Opt_bsd_df, "bsddf"}, |
1087 | {Opt_minix_df, "minixdf"}, | |
1088 | {Opt_grpid, "grpid"}, | |
1089 | {Opt_grpid, "bsdgroups"}, | |
1090 | {Opt_nogrpid, "nogrpid"}, | |
1091 | {Opt_nogrpid, "sysvgroups"}, | |
1092 | {Opt_resgid, "resgid=%u"}, | |
1093 | {Opt_resuid, "resuid=%u"}, | |
1094 | {Opt_sb, "sb=%u"}, | |
1095 | {Opt_err_cont, "errors=continue"}, | |
1096 | {Opt_err_panic, "errors=panic"}, | |
1097 | {Opt_err_ro, "errors=remount-ro"}, | |
1098 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1099 | {Opt_debug, "debug"}, |
1100 | {Opt_oldalloc, "oldalloc"}, | |
1101 | {Opt_orlov, "orlov"}, | |
1102 | {Opt_user_xattr, "user_xattr"}, | |
1103 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1104 | {Opt_acl, "acl"}, | |
1105 | {Opt_noacl, "noacl"}, | |
ac27a0ec DK |
1106 | {Opt_noload, "noload"}, |
1107 | {Opt_nobh, "nobh"}, | |
1108 | {Opt_bh, "bh"}, | |
1109 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1110 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1111 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1112 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1113 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1114 | {Opt_journal_checksum, "journal_checksum"}, |
1115 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1116 | {Opt_abort, "abort"}, |
1117 | {Opt_data_journal, "data=journal"}, | |
1118 | {Opt_data_ordered, "data=ordered"}, | |
1119 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1120 | {Opt_data_err_abort, "data_err=abort"}, |
1121 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1122 | {Opt_offusrjquota, "usrjquota="}, |
1123 | {Opt_usrjquota, "usrjquota=%s"}, | |
1124 | {Opt_offgrpjquota, "grpjquota="}, | |
1125 | {Opt_grpjquota, "grpjquota=%s"}, | |
1126 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1127 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1128 | {Opt_grpquota, "grpquota"}, | |
1129 | {Opt_noquota, "noquota"}, | |
1130 | {Opt_quota, "quota"}, | |
1131 | {Opt_usrquota, "usrquota"}, | |
1132 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1133 | {Opt_barrier, "barrier"}, |
1134 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1135 | {Opt_i_version, "i_version"}, |
c9de560d | 1136 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1137 | {Opt_resize, "resize"}, |
64769240 | 1138 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1139 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1140 | {Opt_block_validity, "block_validity"}, |
1141 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1142 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1143 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1144 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1145 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1146 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
f3f12faa | 1147 | {Opt_err, NULL}, |
ac27a0ec DK |
1148 | }; |
1149 | ||
617ba13b | 1150 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1151 | { |
617ba13b | 1152 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1153 | char *options = (char *) *data; |
1154 | ||
1155 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1156 | return 1; /* Default location */ | |
0b8e58a1 | 1157 | |
ac27a0ec | 1158 | options += 3; |
0b8e58a1 | 1159 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1160 | sb_block = simple_strtoul(options, &options, 0); |
1161 | if (*options && *options != ',') { | |
4776004f | 1162 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1163 | (char *) *data); |
1164 | return 1; | |
1165 | } | |
1166 | if (*options == ',') | |
1167 | options++; | |
1168 | *data = (void *) options; | |
0b8e58a1 | 1169 | |
ac27a0ec DK |
1170 | return sb_block; |
1171 | } | |
1172 | ||
b3881f74 TT |
1173 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1174 | ||
2b2d6d01 | 1175 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1176 | unsigned long *journal_devnum, |
b3881f74 | 1177 | unsigned int *journal_ioprio, |
2b2d6d01 | 1178 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1179 | { |
617ba13b | 1180 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1181 | char *p; |
ac27a0ec DK |
1182 | substring_t args[MAX_OPT_ARGS]; |
1183 | int data_opt = 0; | |
1184 | int option; | |
1185 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1186 | int qtype, qfmt; |
ac27a0ec DK |
1187 | char *qname; |
1188 | #endif | |
1189 | ||
1190 | if (!options) | |
1191 | return 1; | |
1192 | ||
2b2d6d01 | 1193 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1194 | int token; |
1195 | if (!*p) | |
1196 | continue; | |
1197 | ||
1198 | token = match_token(p, tokens, args); | |
1199 | switch (token) { | |
1200 | case Opt_bsd_df: | |
2b2d6d01 | 1201 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1202 | break; |
1203 | case Opt_minix_df: | |
2b2d6d01 | 1204 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1205 | break; |
1206 | case Opt_grpid: | |
2b2d6d01 | 1207 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1208 | break; |
1209 | case Opt_nogrpid: | |
2b2d6d01 | 1210 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1211 | break; |
1212 | case Opt_resuid: | |
1213 | if (match_int(&args[0], &option)) | |
1214 | return 0; | |
1215 | sbi->s_resuid = option; | |
1216 | break; | |
1217 | case Opt_resgid: | |
1218 | if (match_int(&args[0], &option)) | |
1219 | return 0; | |
1220 | sbi->s_resgid = option; | |
1221 | break; | |
1222 | case Opt_sb: | |
1223 | /* handled by get_sb_block() instead of here */ | |
1224 | /* *sb_block = match_int(&args[0]); */ | |
1225 | break; | |
1226 | case Opt_err_panic: | |
2b2d6d01 TT |
1227 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1228 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1229 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1230 | break; |
1231 | case Opt_err_ro: | |
2b2d6d01 TT |
1232 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1233 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1234 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1235 | break; |
1236 | case Opt_err_cont: | |
2b2d6d01 TT |
1237 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1238 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1239 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1240 | break; |
1241 | case Opt_nouid32: | |
2b2d6d01 | 1242 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1243 | break; |
ac27a0ec | 1244 | case Opt_debug: |
2b2d6d01 | 1245 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1246 | break; |
1247 | case Opt_oldalloc: | |
2b2d6d01 | 1248 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1249 | break; |
1250 | case Opt_orlov: | |
2b2d6d01 | 1251 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1252 | break; |
03010a33 | 1253 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1254 | case Opt_user_xattr: |
2b2d6d01 | 1255 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1256 | break; |
1257 | case Opt_nouser_xattr: | |
2b2d6d01 | 1258 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1259 | break; |
1260 | #else | |
1261 | case Opt_user_xattr: | |
1262 | case Opt_nouser_xattr: | |
b31e1552 | 1263 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1264 | break; |
1265 | #endif | |
03010a33 | 1266 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1267 | case Opt_acl: |
1268 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1269 | break; | |
1270 | case Opt_noacl: | |
1271 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1272 | break; | |
1273 | #else | |
1274 | case Opt_acl: | |
1275 | case Opt_noacl: | |
b31e1552 | 1276 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1277 | break; |
1278 | #endif | |
ac27a0ec DK |
1279 | case Opt_journal_update: |
1280 | /* @@@ FIXME */ | |
1281 | /* Eventually we will want to be able to create | |
1282 | a journal file here. For now, only allow the | |
1283 | user to specify an existing inode to be the | |
1284 | journal file. */ | |
1285 | if (is_remount) { | |
b31e1552 ES |
1286 | ext4_msg(sb, KERN_ERR, |
1287 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1288 | return 0; |
1289 | } | |
2b2d6d01 | 1290 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1291 | break; |
ac27a0ec DK |
1292 | case Opt_journal_dev: |
1293 | if (is_remount) { | |
b31e1552 ES |
1294 | ext4_msg(sb, KERN_ERR, |
1295 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1296 | return 0; |
1297 | } | |
1298 | if (match_int(&args[0], &option)) | |
1299 | return 0; | |
1300 | *journal_devnum = option; | |
1301 | break; | |
818d276c | 1302 | case Opt_journal_checksum: |
d4da6c9c LT |
1303 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
1304 | break; | |
818d276c GS |
1305 | case Opt_journal_async_commit: |
1306 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
d4da6c9c | 1307 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
818d276c | 1308 | break; |
ac27a0ec | 1309 | case Opt_noload: |
2b2d6d01 | 1310 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1311 | break; |
1312 | case Opt_commit: | |
1313 | if (match_int(&args[0], &option)) | |
1314 | return 0; | |
1315 | if (option < 0) | |
1316 | return 0; | |
1317 | if (option == 0) | |
cd02ff0b | 1318 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1319 | sbi->s_commit_interval = HZ * option; |
1320 | break; | |
30773840 TT |
1321 | case Opt_max_batch_time: |
1322 | if (match_int(&args[0], &option)) | |
1323 | return 0; | |
1324 | if (option < 0) | |
1325 | return 0; | |
1326 | if (option == 0) | |
1327 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1328 | sbi->s_max_batch_time = option; | |
1329 | break; | |
1330 | case Opt_min_batch_time: | |
1331 | if (match_int(&args[0], &option)) | |
1332 | return 0; | |
1333 | if (option < 0) | |
1334 | return 0; | |
1335 | sbi->s_min_batch_time = option; | |
1336 | break; | |
ac27a0ec | 1337 | case Opt_data_journal: |
617ba13b | 1338 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1339 | goto datacheck; |
1340 | case Opt_data_ordered: | |
617ba13b | 1341 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1342 | goto datacheck; |
1343 | case Opt_data_writeback: | |
617ba13b | 1344 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1345 | datacheck: |
1346 | if (is_remount) { | |
617ba13b | 1347 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec | 1348 | != data_opt) { |
b31e1552 ES |
1349 | ext4_msg(sb, KERN_ERR, |
1350 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1351 | return 0; |
1352 | } | |
1353 | } else { | |
617ba13b | 1354 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1355 | sbi->s_mount_opt |= data_opt; |
1356 | } | |
1357 | break; | |
5bf5683a HK |
1358 | case Opt_data_err_abort: |
1359 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1360 | break; | |
1361 | case Opt_data_err_ignore: | |
1362 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1363 | break; | |
ac27a0ec DK |
1364 | #ifdef CONFIG_QUOTA |
1365 | case Opt_usrjquota: | |
1366 | qtype = USRQUOTA; | |
1367 | goto set_qf_name; | |
1368 | case Opt_grpjquota: | |
1369 | qtype = GRPQUOTA; | |
1370 | set_qf_name: | |
17bd13b3 | 1371 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1372 | !sbi->s_qf_names[qtype]) { |
b31e1552 ES |
1373 | ext4_msg(sb, KERN_ERR, |
1374 | "Cannot change journaled " | |
1375 | "quota options when quota turned on"); | |
ac27a0ec DK |
1376 | return 0; |
1377 | } | |
1378 | qname = match_strdup(&args[0]); | |
1379 | if (!qname) { | |
b31e1552 ES |
1380 | ext4_msg(sb, KERN_ERR, |
1381 | "Not enough memory for " | |
1382 | "storing quotafile name"); | |
ac27a0ec DK |
1383 | return 0; |
1384 | } | |
1385 | if (sbi->s_qf_names[qtype] && | |
1386 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
b31e1552 ES |
1387 | ext4_msg(sb, KERN_ERR, |
1388 | "%s quota file already " | |
1389 | "specified", QTYPE2NAME(qtype)); | |
ac27a0ec DK |
1390 | kfree(qname); |
1391 | return 0; | |
1392 | } | |
1393 | sbi->s_qf_names[qtype] = qname; | |
1394 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
b31e1552 ES |
1395 | ext4_msg(sb, KERN_ERR, |
1396 | "quotafile must be on " | |
1397 | "filesystem root"); | |
ac27a0ec DK |
1398 | kfree(sbi->s_qf_names[qtype]); |
1399 | sbi->s_qf_names[qtype] = NULL; | |
1400 | return 0; | |
1401 | } | |
1402 | set_opt(sbi->s_mount_opt, QUOTA); | |
1403 | break; | |
1404 | case Opt_offusrjquota: | |
1405 | qtype = USRQUOTA; | |
1406 | goto clear_qf_name; | |
1407 | case Opt_offgrpjquota: | |
1408 | qtype = GRPQUOTA; | |
1409 | clear_qf_name: | |
17bd13b3 | 1410 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1411 | sbi->s_qf_names[qtype]) { |
b31e1552 | 1412 | ext4_msg(sb, KERN_ERR, "Cannot change " |
2c8be6b2 | 1413 | "journaled quota options when " |
b31e1552 | 1414 | "quota turned on"); |
ac27a0ec DK |
1415 | return 0; |
1416 | } | |
1417 | /* | |
1418 | * The space will be released later when all options | |
1419 | * are confirmed to be correct | |
1420 | */ | |
1421 | sbi->s_qf_names[qtype] = NULL; | |
1422 | break; | |
1423 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1424 | qfmt = QFMT_VFS_OLD; |
1425 | goto set_qf_format; | |
ac27a0ec | 1426 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1427 | qfmt = QFMT_VFS_V0; |
1428 | set_qf_format: | |
17bd13b3 | 1429 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1430 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1431 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1432 | "journaled quota options when " |
b31e1552 | 1433 | "quota turned on"); |
dfc5d03f JK |
1434 | return 0; |
1435 | } | |
1436 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1437 | break; |
1438 | case Opt_quota: | |
1439 | case Opt_usrquota: | |
1440 | set_opt(sbi->s_mount_opt, QUOTA); | |
1441 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1442 | break; | |
1443 | case Opt_grpquota: | |
1444 | set_opt(sbi->s_mount_opt, QUOTA); | |
1445 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1446 | break; | |
1447 | case Opt_noquota: | |
17bd13b3 | 1448 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1449 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1450 | "options when quota turned on"); | |
ac27a0ec DK |
1451 | return 0; |
1452 | } | |
1453 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1454 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1455 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1456 | break; | |
1457 | #else | |
1458 | case Opt_quota: | |
1459 | case Opt_usrquota: | |
1460 | case Opt_grpquota: | |
b31e1552 ES |
1461 | ext4_msg(sb, KERN_ERR, |
1462 | "quota options not supported"); | |
cd59e7b9 | 1463 | break; |
ac27a0ec DK |
1464 | case Opt_usrjquota: |
1465 | case Opt_grpjquota: | |
1466 | case Opt_offusrjquota: | |
1467 | case Opt_offgrpjquota: | |
1468 | case Opt_jqfmt_vfsold: | |
1469 | case Opt_jqfmt_vfsv0: | |
b31e1552 ES |
1470 | ext4_msg(sb, KERN_ERR, |
1471 | "journaled quota options not supported"); | |
ac27a0ec DK |
1472 | break; |
1473 | case Opt_noquota: | |
1474 | break; | |
1475 | #endif | |
1476 | case Opt_abort: | |
4ab2f15b | 1477 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1478 | break; |
06705bff TT |
1479 | case Opt_nobarrier: |
1480 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1481 | break; | |
ac27a0ec | 1482 | case Opt_barrier: |
06705bff TT |
1483 | if (match_int(&args[0], &option)) { |
1484 | set_opt(sbi->s_mount_opt, BARRIER); | |
1485 | break; | |
1486 | } | |
ac27a0ec DK |
1487 | if (option) |
1488 | set_opt(sbi->s_mount_opt, BARRIER); | |
1489 | else | |
1490 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1491 | break; | |
1492 | case Opt_ignore: | |
1493 | break; | |
1494 | case Opt_resize: | |
1495 | if (!is_remount) { | |
b31e1552 ES |
1496 | ext4_msg(sb, KERN_ERR, |
1497 | "resize option only available " | |
1498 | "for remount"); | |
ac27a0ec DK |
1499 | return 0; |
1500 | } | |
1501 | if (match_int(&args[0], &option) != 0) | |
1502 | return 0; | |
1503 | *n_blocks_count = option; | |
1504 | break; | |
1505 | case Opt_nobh: | |
1506 | set_opt(sbi->s_mount_opt, NOBH); | |
1507 | break; | |
1508 | case Opt_bh: | |
1509 | clear_opt(sbi->s_mount_opt, NOBH); | |
1510 | break; | |
25ec56b5 JNC |
1511 | case Opt_i_version: |
1512 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1513 | sb->s_flags |= MS_I_VERSION; | |
1514 | break; | |
dd919b98 AK |
1515 | case Opt_nodelalloc: |
1516 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1517 | break; | |
c9de560d AT |
1518 | case Opt_stripe: |
1519 | if (match_int(&args[0], &option)) | |
1520 | return 0; | |
1521 | if (option < 0) | |
1522 | return 0; | |
1523 | sbi->s_stripe = option; | |
1524 | break; | |
64769240 AT |
1525 | case Opt_delalloc: |
1526 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1527 | break; | |
6fd058f7 TT |
1528 | case Opt_block_validity: |
1529 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1530 | break; | |
1531 | case Opt_noblock_validity: | |
1532 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1533 | break; | |
240799cd TT |
1534 | case Opt_inode_readahead_blks: |
1535 | if (match_int(&args[0], &option)) | |
1536 | return 0; | |
1537 | if (option < 0 || option > (1 << 30)) | |
1538 | return 0; | |
f7c43950 | 1539 | if (!is_power_of_2(option)) { |
b31e1552 ES |
1540 | ext4_msg(sb, KERN_ERR, |
1541 | "EXT4-fs: inode_readahead_blks" | |
1542 | " must be a power of 2"); | |
3197ebdb TT |
1543 | return 0; |
1544 | } | |
240799cd TT |
1545 | sbi->s_inode_readahead_blks = option; |
1546 | break; | |
b3881f74 TT |
1547 | case Opt_journal_ioprio: |
1548 | if (match_int(&args[0], &option)) | |
1549 | return 0; | |
1550 | if (option < 0 || option > 7) | |
1551 | break; | |
1552 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1553 | option); | |
1554 | break; | |
06705bff TT |
1555 | case Opt_noauto_da_alloc: |
1556 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1557 | break; | |
afd4672d | 1558 | case Opt_auto_da_alloc: |
06705bff TT |
1559 | if (match_int(&args[0], &option)) { |
1560 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1561 | break; | |
1562 | } | |
afd4672d TT |
1563 | if (option) |
1564 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1565 | else | |
1566 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1567 | break; | |
ac27a0ec | 1568 | default: |
b31e1552 ES |
1569 | ext4_msg(sb, KERN_ERR, |
1570 | "Unrecognized mount option \"%s\" " | |
1571 | "or missing value", p); | |
ac27a0ec DK |
1572 | return 0; |
1573 | } | |
1574 | } | |
1575 | #ifdef CONFIG_QUOTA | |
1576 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1577 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1578 | sbi->s_qf_names[USRQUOTA]) |
1579 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1580 | ||
617ba13b | 1581 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1582 | sbi->s_qf_names[GRPQUOTA]) |
1583 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1584 | ||
1585 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1586 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1587 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b | 1588 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
b31e1552 ES |
1589 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1590 | "format mixing"); | |
ac27a0ec DK |
1591 | return 0; |
1592 | } | |
1593 | ||
1594 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1595 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1596 | "not specified"); | |
ac27a0ec DK |
1597 | return 0; |
1598 | } | |
1599 | } else { | |
1600 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1601 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1602 | "specified with no journaling " |
b31e1552 | 1603 | "enabled"); |
ac27a0ec DK |
1604 | return 0; |
1605 | } | |
1606 | } | |
1607 | #endif | |
1608 | return 1; | |
1609 | } | |
1610 | ||
617ba13b | 1611 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1612 | int read_only) |
1613 | { | |
617ba13b | 1614 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1615 | int res = 0; |
1616 | ||
617ba13b | 1617 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1618 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1619 | "forcing read-only mode"); | |
ac27a0ec DK |
1620 | res = MS_RDONLY; |
1621 | } | |
1622 | if (read_only) | |
1623 | return res; | |
617ba13b | 1624 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1625 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1626 | "running e2fsck is recommended"); | |
617ba13b | 1627 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1628 | ext4_msg(sb, KERN_WARNING, |
1629 | "warning: mounting fs with errors, " | |
1630 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1631 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1632 | le16_to_cpu(es->s_mnt_count) >= | |
1633 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1634 | ext4_msg(sb, KERN_WARNING, |
1635 | "warning: maximal mount count reached, " | |
1636 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1637 | else if (le32_to_cpu(es->s_checkinterval) && |
1638 | (le32_to_cpu(es->s_lastcheck) + | |
1639 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1640 | ext4_msg(sb, KERN_WARNING, |
1641 | "warning: checktime reached, " | |
1642 | "running e2fsck is recommended"); | |
0b8e58a1 | 1643 | if (!sbi->s_journal) |
0390131b | 1644 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1645 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1646 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1647 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1648 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1649 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1650 | if (sbi->s_journal) |
1651 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1652 | |
e2d67052 | 1653 | ext4_commit_super(sb, 1); |
ac27a0ec | 1654 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1655 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
7f4520cc | 1656 | "bpg=%lu, ipg=%lu, mo=%04x]\n", |
ac27a0ec DK |
1657 | sb->s_blocksize, |
1658 | sbi->s_groups_count, | |
617ba13b MC |
1659 | EXT4_BLOCKS_PER_GROUP(sb), |
1660 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1661 | sbi->s_mount_opt); |
1662 | ||
ac27a0ec DK |
1663 | return res; |
1664 | } | |
1665 | ||
772cb7c8 JS |
1666 | static int ext4_fill_flex_info(struct super_block *sb) |
1667 | { | |
1668 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1669 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1670 | ext4_group_t flex_group_count; |
1671 | ext4_group_t flex_group; | |
1672 | int groups_per_flex = 0; | |
c5ca7c76 | 1673 | size_t size; |
772cb7c8 JS |
1674 | int i; |
1675 | ||
1676 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1677 | sbi->s_log_groups_per_flex = 0; | |
1678 | return 1; | |
1679 | } | |
1680 | ||
1681 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1682 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1683 | ||
c62a11fd FB |
1684 | /* We allocate both existing and potentially added groups */ |
1685 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1686 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1687 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1688 | size = flex_group_count * sizeof(struct flex_groups); |
1689 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1690 | if (sbi->s_flex_groups == NULL) { | |
1691 | sbi->s_flex_groups = vmalloc(size); | |
1692 | if (sbi->s_flex_groups) | |
1693 | memset(sbi->s_flex_groups, 0, size); | |
1694 | } | |
772cb7c8 | 1695 | if (sbi->s_flex_groups == NULL) { |
b31e1552 ES |
1696 | ext4_msg(sb, KERN_ERR, "not enough memory for " |
1697 | "%u flex groups", flex_group_count); | |
772cb7c8 JS |
1698 | goto failed; |
1699 | } | |
772cb7c8 | 1700 | |
772cb7c8 | 1701 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1702 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1703 | |
1704 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1705 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1706 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1707 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1708 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1709 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1710 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1711 | } |
1712 | ||
1713 | return 1; | |
1714 | failed: | |
1715 | return 0; | |
1716 | } | |
1717 | ||
717d50e4 AD |
1718 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1719 | struct ext4_group_desc *gdp) | |
1720 | { | |
1721 | __u16 crc = 0; | |
1722 | ||
1723 | if (sbi->s_es->s_feature_ro_compat & | |
1724 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1725 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1726 | __le32 le_group = cpu_to_le32(block_group); | |
1727 | ||
1728 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1729 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1730 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1731 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1732 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1733 | if ((sbi->s_es->s_feature_incompat & | |
1734 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1735 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1736 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1737 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1738 | offset); | |
1739 | } | |
1740 | ||
1741 | return cpu_to_le16(crc); | |
1742 | } | |
1743 | ||
1744 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1745 | struct ext4_group_desc *gdp) | |
1746 | { | |
1747 | if ((sbi->s_es->s_feature_ro_compat & | |
1748 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1749 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1750 | return 0; | |
1751 | ||
1752 | return 1; | |
1753 | } | |
1754 | ||
ac27a0ec | 1755 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1756 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1757 | { |
617ba13b MC |
1758 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1759 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1760 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1761 | ext4_fsblk_t block_bitmap; |
1762 | ext4_fsblk_t inode_bitmap; | |
1763 | ext4_fsblk_t inode_table; | |
ce421581 | 1764 | int flexbg_flag = 0; |
fd2d4291 | 1765 | ext4_group_t i; |
ac27a0ec | 1766 | |
ce421581 JS |
1767 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1768 | flexbg_flag = 1; | |
1769 | ||
af5bc92d | 1770 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1771 | |
197cd65a AM |
1772 | for (i = 0; i < sbi->s_groups_count; i++) { |
1773 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1774 | ||
ce421581 | 1775 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1776 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1777 | else |
1778 | last_block = first_block + | |
617ba13b | 1779 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1780 | |
8fadc143 | 1781 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1782 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 1783 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1784 | "Block bitmap for group %u not in group " |
b31e1552 | 1785 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
1786 | return 0; |
1787 | } | |
8fadc143 | 1788 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1789 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 1790 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1791 | "Inode bitmap for group %u not in group " |
b31e1552 | 1792 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
1793 | return 0; |
1794 | } | |
8fadc143 | 1795 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1796 | if (inode_table < first_block || |
2b2d6d01 | 1797 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 1798 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1799 | "Inode table for group %u not in group " |
b31e1552 | 1800 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
1801 | return 0; |
1802 | } | |
955ce5f5 | 1803 | ext4_lock_group(sb, i); |
717d50e4 | 1804 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
1805 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
1806 | "Checksum for group %u failed (%u!=%u)", | |
1807 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
1808 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 1809 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 1810 | ext4_unlock_group(sb, i); |
8a266467 | 1811 | return 0; |
7ee1ec4c | 1812 | } |
717d50e4 | 1813 | } |
955ce5f5 | 1814 | ext4_unlock_group(sb, i); |
ce421581 JS |
1815 | if (!flexbg_flag) |
1816 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1817 | } |
1818 | ||
bd81d8ee | 1819 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 1820 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1821 | return 1; |
1822 | } | |
1823 | ||
617ba13b | 1824 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1825 | * the superblock) which were deleted from all directories, but held open by |
1826 | * a process at the time of a crash. We walk the list and try to delete these | |
1827 | * inodes at recovery time (only with a read-write filesystem). | |
1828 | * | |
1829 | * In order to keep the orphan inode chain consistent during traversal (in | |
1830 | * case of crash during recovery), we link each inode into the superblock | |
1831 | * orphan list_head and handle it the same way as an inode deletion during | |
1832 | * normal operation (which journals the operations for us). | |
1833 | * | |
1834 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1835 | * accidentally point at an in-use or already deleted inode. The worst that | |
1836 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1837 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1838 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1839 | * inode cleanup for us, so we can safely abort without any further action. | |
1840 | */ | |
2b2d6d01 TT |
1841 | static void ext4_orphan_cleanup(struct super_block *sb, |
1842 | struct ext4_super_block *es) | |
ac27a0ec DK |
1843 | { |
1844 | unsigned int s_flags = sb->s_flags; | |
1845 | int nr_orphans = 0, nr_truncates = 0; | |
1846 | #ifdef CONFIG_QUOTA | |
1847 | int i; | |
1848 | #endif | |
1849 | if (!es->s_last_orphan) { | |
1850 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1851 | return; | |
1852 | } | |
1853 | ||
a8f48a95 | 1854 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
1855 | ext4_msg(sb, KERN_ERR, "write access " |
1856 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
1857 | return; |
1858 | } | |
1859 | ||
617ba13b | 1860 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1861 | if (es->s_last_orphan) |
1862 | jbd_debug(1, "Errors on filesystem, " | |
1863 | "clearing orphan list.\n"); | |
1864 | es->s_last_orphan = 0; | |
1865 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1866 | return; | |
1867 | } | |
1868 | ||
1869 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 1870 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
1871 | sb->s_flags &= ~MS_RDONLY; |
1872 | } | |
1873 | #ifdef CONFIG_QUOTA | |
1874 | /* Needed for iput() to work correctly and not trash data */ | |
1875 | sb->s_flags |= MS_ACTIVE; | |
1876 | /* Turn on quotas so that they are updated correctly */ | |
1877 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1878 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1879 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 1880 | if (ret < 0) |
b31e1552 ES |
1881 | ext4_msg(sb, KERN_ERR, |
1882 | "Cannot turn on journaled " | |
1883 | "quota: error %d", ret); | |
ac27a0ec DK |
1884 | } |
1885 | } | |
1886 | #endif | |
1887 | ||
1888 | while (es->s_last_orphan) { | |
1889 | struct inode *inode; | |
1890 | ||
97bd42b9 JB |
1891 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1892 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1893 | es->s_last_orphan = 0; |
1894 | break; | |
1895 | } | |
1896 | ||
617ba13b | 1897 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 1898 | vfs_dq_init(inode); |
ac27a0ec | 1899 | if (inode->i_nlink) { |
b31e1552 ES |
1900 | ext4_msg(sb, KERN_DEBUG, |
1901 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 1902 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1903 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1904 | inode->i_ino, inode->i_size); |
617ba13b | 1905 | ext4_truncate(inode); |
ac27a0ec DK |
1906 | nr_truncates++; |
1907 | } else { | |
b31e1552 ES |
1908 | ext4_msg(sb, KERN_DEBUG, |
1909 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 1910 | __func__, inode->i_ino); |
ac27a0ec DK |
1911 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1912 | inode->i_ino); | |
1913 | nr_orphans++; | |
1914 | } | |
1915 | iput(inode); /* The delete magic happens here! */ | |
1916 | } | |
1917 | ||
2b2d6d01 | 1918 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1919 | |
1920 | if (nr_orphans) | |
b31e1552 ES |
1921 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
1922 | PLURAL(nr_orphans)); | |
ac27a0ec | 1923 | if (nr_truncates) |
b31e1552 ES |
1924 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
1925 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
1926 | #ifdef CONFIG_QUOTA |
1927 | /* Turn quotas off */ | |
1928 | for (i = 0; i < MAXQUOTAS; i++) { | |
1929 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1930 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1931 | } |
1932 | #endif | |
1933 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1934 | } | |
0b8e58a1 | 1935 | |
cd2291a4 ES |
1936 | /* |
1937 | * Maximal extent format file size. | |
1938 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1939 | * extent format containers, within a sector_t, and within i_blocks | |
1940 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1941 | * so that won't be a limiting factor. | |
1942 | * | |
1943 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1944 | */ | |
f287a1a5 | 1945 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1946 | { |
1947 | loff_t res; | |
1948 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1949 | ||
1950 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1951 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1952 | /* |
90c699a9 | 1953 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
1954 | * i_block represent total blocks in 512 bytes |
1955 | * 32 == size of vfs inode i_blocks * 8 | |
1956 | */ | |
1957 | upper_limit = (1LL << 32) - 1; | |
1958 | ||
1959 | /* total blocks in file system block size */ | |
1960 | upper_limit >>= (blkbits - 9); | |
1961 | upper_limit <<= blkbits; | |
1962 | } | |
1963 | ||
1964 | /* 32-bit extent-start container, ee_block */ | |
1965 | res = 1LL << 32; | |
1966 | res <<= blkbits; | |
1967 | res -= 1; | |
1968 | ||
1969 | /* Sanity check against vm- & vfs- imposed limits */ | |
1970 | if (res > upper_limit) | |
1971 | res = upper_limit; | |
1972 | ||
1973 | return res; | |
1974 | } | |
ac27a0ec | 1975 | |
ac27a0ec | 1976 | /* |
cd2291a4 | 1977 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1978 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1979 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1980 | */ |
f287a1a5 | 1981 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1982 | { |
617ba13b | 1983 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1984 | int meta_blocks; |
1985 | loff_t upper_limit; | |
0b8e58a1 AD |
1986 | /* This is calculated to be the largest file size for a dense, block |
1987 | * mapped file such that the file's total number of 512-byte sectors, | |
1988 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
1989 | * | |
1990 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
1991 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
1992 | */ |
1993 | ||
f287a1a5 | 1994 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1995 | /* |
90c699a9 | 1996 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
1997 | * the inode i_block field represents total file blocks in |
1998 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1999 | */ |
2000 | upper_limit = (1LL << 32) - 1; | |
2001 | ||
2002 | /* total blocks in file system block size */ | |
2003 | upper_limit >>= (bits - 9); | |
2004 | ||
2005 | } else { | |
8180a562 AK |
2006 | /* |
2007 | * We use 48 bit ext4_inode i_blocks | |
2008 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2009 | * represent total number of blocks in | |
2010 | * file system block size | |
2011 | */ | |
0fc1b451 AK |
2012 | upper_limit = (1LL << 48) - 1; |
2013 | ||
0fc1b451 AK |
2014 | } |
2015 | ||
2016 | /* indirect blocks */ | |
2017 | meta_blocks = 1; | |
2018 | /* double indirect blocks */ | |
2019 | meta_blocks += 1 + (1LL << (bits-2)); | |
2020 | /* tripple indirect blocks */ | |
2021 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2022 | ||
2023 | upper_limit -= meta_blocks; | |
2024 | upper_limit <<= bits; | |
ac27a0ec DK |
2025 | |
2026 | res += 1LL << (bits-2); | |
2027 | res += 1LL << (2*(bits-2)); | |
2028 | res += 1LL << (3*(bits-2)); | |
2029 | res <<= bits; | |
2030 | if (res > upper_limit) | |
2031 | res = upper_limit; | |
0fc1b451 AK |
2032 | |
2033 | if (res > MAX_LFS_FILESIZE) | |
2034 | res = MAX_LFS_FILESIZE; | |
2035 | ||
ac27a0ec DK |
2036 | return res; |
2037 | } | |
2038 | ||
617ba13b | 2039 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2040 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2041 | { |
617ba13b | 2042 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2043 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2044 | int has_super = 0; |
2045 | ||
2046 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2047 | ||
617ba13b | 2048 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2049 | nr < first_meta_bg) |
70bbb3e0 | 2050 | return logical_sb_block + nr + 1; |
ac27a0ec | 2051 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2052 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2053 | has_super = 1; |
0b8e58a1 | 2054 | |
617ba13b | 2055 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2056 | } |
2057 | ||
c9de560d AT |
2058 | /** |
2059 | * ext4_get_stripe_size: Get the stripe size. | |
2060 | * @sbi: In memory super block info | |
2061 | * | |
2062 | * If we have specified it via mount option, then | |
2063 | * use the mount option value. If the value specified at mount time is | |
2064 | * greater than the blocks per group use the super block value. | |
2065 | * If the super block value is greater than blocks per group return 0. | |
2066 | * Allocator needs it be less than blocks per group. | |
2067 | * | |
2068 | */ | |
2069 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2070 | { | |
2071 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2072 | unsigned long stripe_width = | |
2073 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2074 | ||
2075 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2076 | return sbi->s_stripe; | |
2077 | ||
2078 | if (stripe_width <= sbi->s_blocks_per_group) | |
2079 | return stripe_width; | |
2080 | ||
2081 | if (stride <= sbi->s_blocks_per_group) | |
2082 | return stride; | |
2083 | ||
2084 | return 0; | |
2085 | } | |
ac27a0ec | 2086 | |
3197ebdb TT |
2087 | /* sysfs supprt */ |
2088 | ||
2089 | struct ext4_attr { | |
2090 | struct attribute attr; | |
2091 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2092 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2093 | const char *, size_t); | |
2094 | int offset; | |
2095 | }; | |
2096 | ||
2097 | static int parse_strtoul(const char *buf, | |
2098 | unsigned long max, unsigned long *value) | |
2099 | { | |
2100 | char *endp; | |
2101 | ||
2102 | while (*buf && isspace(*buf)) | |
2103 | buf++; | |
2104 | *value = simple_strtoul(buf, &endp, 0); | |
2105 | while (*endp && isspace(*endp)) | |
2106 | endp++; | |
2107 | if (*endp || *value > max) | |
2108 | return -EINVAL; | |
2109 | ||
2110 | return 0; | |
2111 | } | |
2112 | ||
2113 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2114 | struct ext4_sb_info *sbi, | |
2115 | char *buf) | |
2116 | { | |
2117 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2118 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2119 | } | |
2120 | ||
2121 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2122 | struct ext4_sb_info *sbi, char *buf) | |
2123 | { | |
2124 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2125 | ||
2126 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2127 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2128 | sbi->s_sectors_written_start) >> 1); | |
2129 | } | |
2130 | ||
2131 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2132 | struct ext4_sb_info *sbi, char *buf) | |
2133 | { | |
2134 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2135 | ||
2136 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2137 | sbi->s_kbytes_written + | |
2138 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2139 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
2140 | } | |
2141 | ||
2142 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2143 | struct ext4_sb_info *sbi, | |
2144 | const char *buf, size_t count) | |
2145 | { | |
2146 | unsigned long t; | |
2147 | ||
2148 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2149 | return -EINVAL; | |
2150 | ||
f7c43950 | 2151 | if (!is_power_of_2(t)) |
3197ebdb TT |
2152 | return -EINVAL; |
2153 | ||
2154 | sbi->s_inode_readahead_blks = t; | |
2155 | return count; | |
2156 | } | |
2157 | ||
2158 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2159 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2160 | { |
2161 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2162 | ||
2163 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2164 | } | |
2165 | ||
2166 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2167 | struct ext4_sb_info *sbi, | |
2168 | const char *buf, size_t count) | |
2169 | { | |
2170 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2171 | unsigned long t; | |
2172 | ||
2173 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2174 | return -EINVAL; | |
2175 | *ui = t; | |
2176 | return count; | |
2177 | } | |
2178 | ||
2179 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2180 | static struct ext4_attr ext4_attr_##_name = { \ | |
2181 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2182 | .show = _show, \ | |
2183 | .store = _store, \ | |
2184 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2185 | } | |
2186 | #define EXT4_ATTR(name, mode, show, store) \ | |
2187 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2188 | ||
2189 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2190 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2191 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2192 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2193 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2194 | ||
2195 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2196 | EXT4_RO_ATTR(session_write_kbytes); | |
2197 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2198 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2199 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2200 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2201 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2202 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2203 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2204 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2205 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2206 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2207 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2208 | |
2209 | static struct attribute *ext4_attrs[] = { | |
2210 | ATTR_LIST(delayed_allocation_blocks), | |
2211 | ATTR_LIST(session_write_kbytes), | |
2212 | ATTR_LIST(lifetime_write_kbytes), | |
2213 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2214 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2215 | ATTR_LIST(mb_stats), |
2216 | ATTR_LIST(mb_max_to_scan), | |
2217 | ATTR_LIST(mb_min_to_scan), | |
2218 | ATTR_LIST(mb_order2_req), | |
2219 | ATTR_LIST(mb_stream_req), | |
2220 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2221 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2222 | NULL, |
2223 | }; | |
2224 | ||
2225 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2226 | struct attribute *attr, char *buf) | |
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->show ? a->show(a, sbi, buf) : 0; | |
2233 | } | |
2234 | ||
2235 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2236 | struct attribute *attr, | |
2237 | const char *buf, size_t len) | |
2238 | { | |
2239 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2240 | s_kobj); | |
2241 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2242 | ||
2243 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2244 | } | |
2245 | ||
2246 | static void ext4_sb_release(struct kobject *kobj) | |
2247 | { | |
2248 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2249 | s_kobj); | |
2250 | complete(&sbi->s_kobj_unregister); | |
2251 | } | |
2252 | ||
2253 | ||
2254 | static struct sysfs_ops ext4_attr_ops = { | |
2255 | .show = ext4_attr_show, | |
2256 | .store = ext4_attr_store, | |
2257 | }; | |
2258 | ||
2259 | static struct kobj_type ext4_ktype = { | |
2260 | .default_attrs = ext4_attrs, | |
2261 | .sysfs_ops = &ext4_attr_ops, | |
2262 | .release = ext4_sb_release, | |
2263 | }; | |
2264 | ||
a13fb1a4 ES |
2265 | /* |
2266 | * Check whether this filesystem can be mounted based on | |
2267 | * the features present and the RDONLY/RDWR mount requested. | |
2268 | * Returns 1 if this filesystem can be mounted as requested, | |
2269 | * 0 if it cannot be. | |
2270 | */ | |
2271 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2272 | { | |
2273 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2274 | ext4_msg(sb, KERN_ERR, | |
2275 | "Couldn't mount because of " | |
2276 | "unsupported optional features (%x)", | |
2277 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2278 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2279 | return 0; | |
2280 | } | |
2281 | ||
2282 | if (readonly) | |
2283 | return 1; | |
2284 | ||
2285 | /* Check that feature set is OK for a read-write mount */ | |
2286 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2287 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2288 | "unsupported optional features (%x)", | |
2289 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2290 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2291 | return 0; | |
2292 | } | |
2293 | /* | |
2294 | * Large file size enabled file system can only be mounted | |
2295 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2296 | */ | |
2297 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2298 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2299 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2300 | "cannot be mounted RDWR without " | |
2301 | "CONFIG_LBDAF"); | |
2302 | return 0; | |
2303 | } | |
2304 | } | |
2305 | return 1; | |
2306 | } | |
2307 | ||
2b2d6d01 | 2308 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2309 | __releases(kernel_lock) |
2310 | __acquires(kernel_lock) | |
ac27a0ec | 2311 | { |
2b2d6d01 | 2312 | struct buffer_head *bh; |
617ba13b MC |
2313 | struct ext4_super_block *es = NULL; |
2314 | struct ext4_sb_info *sbi; | |
2315 | ext4_fsblk_t block; | |
2316 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2317 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2318 | unsigned long offset = 0; |
ac27a0ec DK |
2319 | unsigned long journal_devnum = 0; |
2320 | unsigned long def_mount_opts; | |
2321 | struct inode *root; | |
9f6200bb | 2322 | char *cp; |
0390131b | 2323 | const char *descr; |
1d1fe1ee | 2324 | int ret = -EINVAL; |
ac27a0ec | 2325 | int blocksize; |
4ec11028 TT |
2326 | unsigned int db_count; |
2327 | unsigned int i; | |
f287a1a5 | 2328 | int needs_recovery, has_huge_files; |
bd81d8ee | 2329 | __u64 blocks_count; |
833f4077 | 2330 | int err; |
b3881f74 | 2331 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2332 | |
2333 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2334 | if (!sbi) | |
2335 | return -ENOMEM; | |
705895b6 PE |
2336 | |
2337 | sbi->s_blockgroup_lock = | |
2338 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2339 | if (!sbi->s_blockgroup_lock) { | |
2340 | kfree(sbi); | |
2341 | return -ENOMEM; | |
2342 | } | |
ac27a0ec DK |
2343 | sb->s_fs_info = sbi; |
2344 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2345 | sbi->s_resuid = EXT4_DEF_RESUID; |
2346 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2347 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2348 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2349 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2350 | sectors[1]); | |
ac27a0ec DK |
2351 | |
2352 | unlock_kernel(); | |
2353 | ||
9f6200bb TT |
2354 | /* Cleanup superblock name */ |
2355 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2356 | *cp = '!'; | |
2357 | ||
617ba13b | 2358 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2359 | if (!blocksize) { |
b31e1552 | 2360 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
2361 | goto out_fail; |
2362 | } | |
2363 | ||
2364 | /* | |
617ba13b | 2365 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2366 | * block sizes. We need to calculate the offset from buffer start. |
2367 | */ | |
617ba13b | 2368 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2369 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2370 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2371 | } else { |
70bbb3e0 | 2372 | logical_sb_block = sb_block; |
ac27a0ec DK |
2373 | } |
2374 | ||
70bbb3e0 | 2375 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 2376 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
2377 | goto out_fail; |
2378 | } | |
2379 | /* | |
2380 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2381 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2382 | */ |
617ba13b | 2383 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2384 | sbi->s_es = es; |
2385 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2386 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2387 | goto cantfind_ext4; | |
afc32f7e | 2388 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2389 | |
2390 | /* Set defaults before we parse the mount options */ | |
2391 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2392 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2393 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2394 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2395 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2396 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2397 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2398 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2399 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2400 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2401 | #endif |
03010a33 | 2402 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2403 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2404 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2405 | #endif |
617ba13b MC |
2406 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2407 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2408 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2409 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2410 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2411 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2412 | ||
2413 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2414 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2415 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2416 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2417 | else |
2418 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2419 | |
2420 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2421 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2422 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2423 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2424 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 2425 | |
571640ca | 2426 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2427 | |
dd919b98 AK |
2428 | /* |
2429 | * enable delayed allocation by default | |
2430 | * Use -o nodelalloc to turn it off | |
2431 | */ | |
2432 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2433 | ||
b3881f74 TT |
2434 | if (!parse_options((char *) data, sb, &journal_devnum, |
2435 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2436 | goto failed_mount; |
2437 | ||
2438 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2439 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2440 | |
617ba13b MC |
2441 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2442 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2443 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2444 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
2445 | ext4_msg(sb, KERN_WARNING, |
2446 | "feature flags set on rev 0 fs, " | |
2447 | "running e2fsck is recommended"); | |
469108ff | 2448 | |
ac27a0ec DK |
2449 | /* |
2450 | * Check feature flags regardless of the revision level, since we | |
2451 | * previously didn't change the revision level when setting the flags, | |
2452 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2453 | */ | |
a13fb1a4 | 2454 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 2455 | goto failed_mount; |
a13fb1a4 | 2456 | |
ac27a0ec DK |
2457 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2458 | ||
617ba13b MC |
2459 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2460 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
2461 | ext4_msg(sb, KERN_ERR, |
2462 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
2463 | goto failed_mount; |
2464 | } | |
2465 | ||
ac27a0ec | 2466 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2467 | /* Validate the filesystem blocksize */ |
2468 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 2469 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 2470 | blocksize); |
ac27a0ec DK |
2471 | goto failed_mount; |
2472 | } | |
2473 | ||
2b2d6d01 | 2474 | brelse(bh); |
70bbb3e0 AM |
2475 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2476 | offset = do_div(logical_sb_block, blocksize); | |
2477 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 2478 | if (!bh) { |
b31e1552 ES |
2479 | ext4_msg(sb, KERN_ERR, |
2480 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
2481 | goto failed_mount; |
2482 | } | |
617ba13b | 2483 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2484 | sbi->s_es = es; |
617ba13b | 2485 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
2486 | ext4_msg(sb, KERN_ERR, |
2487 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
2488 | goto failed_mount; |
2489 | } | |
2490 | } | |
2491 | ||
a13fb1a4 ES |
2492 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2493 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
2494 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2495 | has_huge_files); | |
2496 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2497 | |
617ba13b MC |
2498 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2499 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2500 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2501 | } else { |
2502 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2503 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2504 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2505 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2506 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
2507 | ext4_msg(sb, KERN_ERR, |
2508 | "unsupported inode size: %d", | |
2b2d6d01 | 2509 | sbi->s_inode_size); |
ac27a0ec DK |
2510 | goto failed_mount; |
2511 | } | |
ef7f3835 KS |
2512 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2513 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2514 | } |
0b8e58a1 | 2515 | |
0d1ee42f AR |
2516 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2517 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2518 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2519 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2520 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
2521 | ext4_msg(sb, KERN_ERR, |
2522 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
2523 | sbi->s_desc_size); |
2524 | goto failed_mount; | |
2525 | } | |
2526 | } else | |
2527 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 2528 | |
ac27a0ec | 2529 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2530 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2531 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 2532 | goto cantfind_ext4; |
0b8e58a1 | 2533 | |
617ba13b | 2534 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 2535 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2536 | goto cantfind_ext4; |
ac27a0ec DK |
2537 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2538 | sbi->s_inodes_per_block; | |
0d1ee42f | 2539 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2540 | sbi->s_sbh = bh; |
2541 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2542 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2543 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 2544 | |
2b2d6d01 | 2545 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2546 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2547 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2548 | i = le32_to_cpu(es->s_flags); |
2549 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2550 | sbi->s_hash_unsigned = 3; | |
2551 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2552 | #ifdef __CHAR_UNSIGNED__ | |
2553 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2554 | sbi->s_hash_unsigned = 3; | |
2555 | #else | |
2556 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2557 | #endif | |
2558 | sb->s_dirt = 1; | |
2559 | } | |
ac27a0ec DK |
2560 | |
2561 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
2562 | ext4_msg(sb, KERN_ERR, |
2563 | "#blocks per group too big: %lu", | |
2b2d6d01 | 2564 | sbi->s_blocks_per_group); |
ac27a0ec DK |
2565 | goto failed_mount; |
2566 | } | |
ac27a0ec | 2567 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
2568 | ext4_msg(sb, KERN_ERR, |
2569 | "#inodes per group too big: %lu", | |
2b2d6d01 | 2570 | sbi->s_inodes_per_group); |
ac27a0ec DK |
2571 | goto failed_mount; |
2572 | } | |
2573 | ||
bf43d84b ES |
2574 | /* |
2575 | * Test whether we have more sectors than will fit in sector_t, | |
2576 | * and whether the max offset is addressable by the page cache. | |
2577 | */ | |
2578 | if ((ext4_blocks_count(es) > | |
2579 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || | |
2580 | (ext4_blocks_count(es) > | |
2581 | (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { | |
b31e1552 | 2582 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 2583 | " too large to mount safely on this system"); |
ac27a0ec | 2584 | if (sizeof(sector_t) < 8) |
90c699a9 | 2585 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
bf43d84b | 2586 | ret = -EFBIG; |
ac27a0ec DK |
2587 | goto failed_mount; |
2588 | } | |
2589 | ||
617ba13b MC |
2590 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2591 | goto cantfind_ext4; | |
e7c95593 | 2592 | |
0f2ddca6 FTN |
2593 | /* check blocks count against device size */ |
2594 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2595 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
2596 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
2597 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
2598 | ext4_blocks_count(es), blocks_count); |
2599 | goto failed_mount; | |
2600 | } | |
2601 | ||
0b8e58a1 AD |
2602 | /* |
2603 | * It makes no sense for the first data block to be beyond the end | |
2604 | * of the filesystem. | |
2605 | */ | |
2606 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
2607 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
2608 | "block %u is beyond end of filesystem (%llu)", | |
2609 | le32_to_cpu(es->s_first_data_block), | |
2610 | ext4_blocks_count(es)); | |
e7c95593 ES |
2611 | goto failed_mount; |
2612 | } | |
bd81d8ee LV |
2613 | blocks_count = (ext4_blocks_count(es) - |
2614 | le32_to_cpu(es->s_first_data_block) + | |
2615 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2616 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 2617 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 2618 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 2619 | "(block count %llu, first data block %u, " |
b31e1552 | 2620 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
2621 | ext4_blocks_count(es), |
2622 | le32_to_cpu(es->s_first_data_block), | |
2623 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2624 | goto failed_mount; | |
2625 | } | |
bd81d8ee | 2626 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
2627 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
2628 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
2629 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2630 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2631 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2632 | GFP_KERNEL); |
2633 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 2634 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
2635 | goto failed_mount; |
2636 | } | |
2637 | ||
3244fcb1 | 2638 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2639 | if (ext4_proc_root) |
2640 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2641 | #endif |
240799cd | 2642 | |
705895b6 | 2643 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2644 | |
2645 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2646 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2647 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2648 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
2649 | ext4_msg(sb, KERN_ERR, |
2650 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
2651 | db_count = i; |
2652 | goto failed_mount2; | |
2653 | } | |
2654 | } | |
2b2d6d01 | 2655 | if (!ext4_check_descriptors(sb)) { |
b31e1552 | 2656 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
2657 | goto failed_mount2; |
2658 | } | |
772cb7c8 JS |
2659 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2660 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
2661 | ext4_msg(sb, KERN_ERR, |
2662 | "unable to initialize " | |
2663 | "flex_bg meta info!"); | |
772cb7c8 JS |
2664 | goto failed_mount2; |
2665 | } | |
2666 | ||
ac27a0ec DK |
2667 | sbi->s_gdb_count = db_count; |
2668 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2669 | spin_lock_init(&sbi->s_next_gen_lock); | |
2670 | ||
833f4077 PZ |
2671 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2672 | ext4_count_free_blocks(sb)); | |
2673 | if (!err) { | |
2674 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2675 | ext4_count_free_inodes(sb)); | |
2676 | } | |
2677 | if (!err) { | |
2678 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2679 | ext4_count_dirs(sb)); | |
2680 | } | |
6bc6e63f AK |
2681 | if (!err) { |
2682 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2683 | } | |
833f4077 | 2684 | if (err) { |
b31e1552 | 2685 | ext4_msg(sb, KERN_ERR, "insufficient memory"); |
833f4077 PZ |
2686 | goto failed_mount3; |
2687 | } | |
ac27a0ec | 2688 | |
c9de560d | 2689 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 2690 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 2691 | |
ac27a0ec DK |
2692 | /* |
2693 | * set up enough so that it can read an inode | |
2694 | */ | |
9ca92389 TT |
2695 | if (!test_opt(sb, NOLOAD) && |
2696 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
2697 | sb->s_op = &ext4_sops; | |
2698 | else | |
2699 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
2700 | sb->s_export_op = &ext4_export_ops; |
2701 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2702 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2703 | sb->s_qcop = &ext4_qctl_operations; |
2704 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2705 | #endif |
2706 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 2707 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 2708 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
2709 | |
2710 | sb->s_root = NULL; | |
2711 | ||
2712 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2713 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2714 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2715 | |
2716 | /* | |
2717 | * The first inode we look at is the journal inode. Don't try | |
2718 | * root first: it may be modified in the journal! | |
2719 | */ | |
2720 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2721 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2722 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2723 | goto failed_mount3; |
624080ed TT |
2724 | if (!(sb->s_flags & MS_RDONLY) && |
2725 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
b31e1552 | 2726 | ext4_msg(sb, KERN_CRIT, "error: " |
624080ed | 2727 | "ext4_fill_super: Journal transaction " |
b31e1552 | 2728 | "%u is corrupt", |
624080ed | 2729 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 | 2730 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 ES |
2731 | ext4_msg(sb, KERN_CRIT, |
2732 | "Mounting filesystem read-only"); | |
624080ed TT |
2733 | sb->s_flags |= MS_RDONLY; |
2734 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2735 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2736 | } | |
2737 | if (test_opt(sb, ERRORS_PANIC)) { | |
2738 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2739 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 2740 | ext4_commit_super(sb, 1); |
624080ed TT |
2741 | goto failed_mount4; |
2742 | } | |
2743 | } | |
0390131b FM |
2744 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2745 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
2746 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
2747 | "suppressed and not mounted read-only"); | |
0390131b | 2748 | goto failed_mount4; |
ac27a0ec | 2749 | } else { |
0390131b FM |
2750 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2751 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2752 | sbi->s_journal = NULL; | |
2753 | needs_recovery = 0; | |
2754 | goto no_journal; | |
ac27a0ec DK |
2755 | } |
2756 | ||
eb40a09c JS |
2757 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2758 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2759 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 2760 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
eb40a09c JS |
2761 | goto failed_mount4; |
2762 | } | |
2763 | ||
d4da6c9c LT |
2764 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2765 | jbd2_journal_set_features(sbi->s_journal, | |
2766 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 2767 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
2768 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
2769 | jbd2_journal_set_features(sbi->s_journal, | |
2770 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
2771 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
2772 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
2773 | } else { |
2774 | jbd2_journal_clear_features(sbi->s_journal, | |
2775 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2776 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2777 | } | |
818d276c | 2778 | |
ac27a0ec DK |
2779 | /* We have now updated the journal if required, so we can |
2780 | * validate the data journaling mode. */ | |
2781 | switch (test_opt(sb, DATA_FLAGS)) { | |
2782 | case 0: | |
2783 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2784 | * capabilities: ORDERED_DATA if the journal can |
2785 | * cope, else JOURNAL_DATA | |
2786 | */ | |
dab291af MC |
2787 | if (jbd2_journal_check_available_features |
2788 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2789 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2790 | else | |
2791 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2792 | break; | |
2793 | ||
617ba13b MC |
2794 | case EXT4_MOUNT_ORDERED_DATA: |
2795 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2796 | if (!jbd2_journal_check_available_features |
2797 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
2798 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
2799 | "requested data journaling mode"); | |
ac27a0ec DK |
2800 | goto failed_mount4; |
2801 | } | |
2802 | default: | |
2803 | break; | |
2804 | } | |
b3881f74 | 2805 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2806 | |
0390131b | 2807 | no_journal: |
ac27a0ec DK |
2808 | |
2809 | if (test_opt(sb, NOBH)) { | |
617ba13b | 2810 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
b31e1552 ES |
2811 | ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " |
2812 | "its supported only with writeback mode"); | |
ac27a0ec DK |
2813 | clear_opt(sbi->s_mount_opt, NOBH); |
2814 | } | |
2815 | } | |
4c0425ff MC |
2816 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
2817 | if (!EXT4_SB(sb)->dio_unwritten_wq) { | |
2818 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
2819 | goto failed_mount_wq; | |
2820 | } | |
2821 | ||
ac27a0ec | 2822 | /* |
dab291af | 2823 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2824 | * so we can safely mount the rest of the filesystem now. |
2825 | */ | |
2826 | ||
1d1fe1ee DH |
2827 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2828 | if (IS_ERR(root)) { | |
b31e1552 | 2829 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 2830 | ret = PTR_ERR(root); |
ac27a0ec DK |
2831 | goto failed_mount4; |
2832 | } | |
2833 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2834 | iput(root); |
b31e1552 | 2835 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
2836 | goto failed_mount4; |
2837 | } | |
1d1fe1ee DH |
2838 | sb->s_root = d_alloc_root(root); |
2839 | if (!sb->s_root) { | |
b31e1552 | 2840 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
2841 | iput(root); |
2842 | ret = -ENOMEM; | |
2843 | goto failed_mount4; | |
2844 | } | |
ac27a0ec | 2845 | |
2b2d6d01 | 2846 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2847 | |
2848 | /* determine the minimum size of new large inodes, if present */ | |
2849 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2850 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2851 | EXT4_GOOD_OLD_INODE_SIZE; | |
2852 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2853 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2854 | if (sbi->s_want_extra_isize < | |
2855 | le16_to_cpu(es->s_want_extra_isize)) | |
2856 | sbi->s_want_extra_isize = | |
2857 | le16_to_cpu(es->s_want_extra_isize); | |
2858 | if (sbi->s_want_extra_isize < | |
2859 | le16_to_cpu(es->s_min_extra_isize)) | |
2860 | sbi->s_want_extra_isize = | |
2861 | le16_to_cpu(es->s_min_extra_isize); | |
2862 | } | |
2863 | } | |
2864 | /* Check if enough inode space is available */ | |
2865 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2866 | sbi->s_inode_size) { | |
2867 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2868 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
2869 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
2870 | "available"); | |
ef7f3835 KS |
2871 | } |
2872 | ||
90576c0b TT |
2873 | if (test_opt(sb, DELALLOC) && |
2874 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
2875 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
2876 | "requested data journaling mode"); | |
c2774d84 | 2877 | clear_opt(sbi->s_mount_opt, DELALLOC); |
90576c0b | 2878 | } |
c2774d84 | 2879 | |
6fd058f7 TT |
2880 | err = ext4_setup_system_zone(sb); |
2881 | if (err) { | |
b31e1552 ES |
2882 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
2883 | "zone (%d)\n", err); | |
6fd058f7 TT |
2884 | goto failed_mount4; |
2885 | } | |
2886 | ||
c2774d84 AK |
2887 | ext4_ext_init(sb); |
2888 | err = ext4_mb_init(sb, needs_recovery); | |
2889 | if (err) { | |
b31e1552 ES |
2890 | ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", |
2891 | err); | |
c2774d84 AK |
2892 | goto failed_mount4; |
2893 | } | |
2894 | ||
3197ebdb TT |
2895 | sbi->s_kobj.kset = ext4_kset; |
2896 | init_completion(&sbi->s_kobj_unregister); | |
2897 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
2898 | "%s", sb->s_id); | |
2899 | if (err) { | |
2900 | ext4_mb_release(sb); | |
2901 | ext4_ext_release(sb); | |
2902 | goto failed_mount4; | |
2903 | }; | |
2904 | ||
617ba13b MC |
2905 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2906 | ext4_orphan_cleanup(sb, es); | |
2907 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2908 | if (needs_recovery) { |
b31e1552 | 2909 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
2910 | ext4_mark_recovery_complete(sb, es); |
2911 | } | |
2912 | if (EXT4_SB(sb)->s_journal) { | |
2913 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2914 | descr = " journalled data mode"; | |
2915 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2916 | descr = " ordered data mode"; | |
2917 | else | |
2918 | descr = " writeback data mode"; | |
2919 | } else | |
2920 | descr = "out journal"; | |
2921 | ||
b31e1552 | 2922 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); |
ac27a0ec DK |
2923 | |
2924 | lock_kernel(); | |
2925 | return 0; | |
2926 | ||
617ba13b | 2927 | cantfind_ext4: |
ac27a0ec | 2928 | if (!silent) |
b31e1552 | 2929 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
2930 | goto failed_mount; |
2931 | ||
2932 | failed_mount4: | |
b31e1552 | 2933 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
2934 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
2935 | failed_mount_wq: | |
6fd058f7 | 2936 | ext4_release_system_zone(sb); |
0390131b FM |
2937 | if (sbi->s_journal) { |
2938 | jbd2_journal_destroy(sbi->s_journal); | |
2939 | sbi->s_journal = NULL; | |
2940 | } | |
ac27a0ec | 2941 | failed_mount3: |
c5ca7c76 TT |
2942 | if (sbi->s_flex_groups) { |
2943 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
2944 | vfree(sbi->s_flex_groups); | |
2945 | else | |
2946 | kfree(sbi->s_flex_groups); | |
2947 | } | |
ac27a0ec DK |
2948 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
2949 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2950 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2951 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2952 | failed_mount2: |
2953 | for (i = 0; i < db_count; i++) | |
2954 | brelse(sbi->s_group_desc[i]); | |
2955 | kfree(sbi->s_group_desc); | |
2956 | failed_mount: | |
240799cd | 2957 | if (sbi->s_proc) { |
9f6200bb | 2958 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2959 | } |
ac27a0ec DK |
2960 | #ifdef CONFIG_QUOTA |
2961 | for (i = 0; i < MAXQUOTAS; i++) | |
2962 | kfree(sbi->s_qf_names[i]); | |
2963 | #endif | |
617ba13b | 2964 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2965 | brelse(bh); |
2966 | out_fail: | |
2967 | sb->s_fs_info = NULL; | |
f6830165 | 2968 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2969 | kfree(sbi); |
2970 | lock_kernel(); | |
1d1fe1ee | 2971 | return ret; |
ac27a0ec DK |
2972 | } |
2973 | ||
2974 | /* | |
2975 | * Setup any per-fs journal parameters now. We'll do this both on | |
2976 | * initial mount, once the journal has been initialised but before we've | |
2977 | * done any recovery; and again on any subsequent remount. | |
2978 | */ | |
617ba13b | 2979 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2980 | { |
617ba13b | 2981 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2982 | |
30773840 TT |
2983 | journal->j_commit_interval = sbi->s_commit_interval; |
2984 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2985 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2986 | |
2987 | spin_lock(&journal->j_state_lock); | |
2988 | if (test_opt(sb, BARRIER)) | |
dab291af | 2989 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2990 | else |
dab291af | 2991 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2992 | if (test_opt(sb, DATA_ERR_ABORT)) |
2993 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2994 | else | |
2995 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2996 | spin_unlock(&journal->j_state_lock); |
2997 | } | |
2998 | ||
617ba13b | 2999 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3000 | unsigned int journal_inum) |
3001 | { | |
3002 | struct inode *journal_inode; | |
3003 | journal_t *journal; | |
3004 | ||
0390131b FM |
3005 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3006 | ||
ac27a0ec DK |
3007 | /* First, test for the existence of a valid inode on disk. Bad |
3008 | * things happen if we iget() an unused inode, as the subsequent | |
3009 | * iput() will try to delete it. */ | |
3010 | ||
1d1fe1ee DH |
3011 | journal_inode = ext4_iget(sb, journal_inum); |
3012 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3013 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3014 | return NULL; |
3015 | } | |
3016 | if (!journal_inode->i_nlink) { | |
3017 | make_bad_inode(journal_inode); | |
3018 | iput(journal_inode); | |
b31e1552 | 3019 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3020 | return NULL; |
3021 | } | |
3022 | ||
e5f8eab8 | 3023 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3024 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3025 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3026 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3027 | iput(journal_inode); |
3028 | return NULL; | |
3029 | } | |
3030 | ||
dab291af | 3031 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3032 | if (!journal) { |
b31e1552 | 3033 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3034 | iput(journal_inode); |
3035 | return NULL; | |
3036 | } | |
3037 | journal->j_private = sb; | |
617ba13b | 3038 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3039 | return journal; |
3040 | } | |
3041 | ||
617ba13b | 3042 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3043 | dev_t j_dev) |
3044 | { | |
2b2d6d01 | 3045 | struct buffer_head *bh; |
ac27a0ec | 3046 | journal_t *journal; |
617ba13b MC |
3047 | ext4_fsblk_t start; |
3048 | ext4_fsblk_t len; | |
ac27a0ec | 3049 | int hblock, blocksize; |
617ba13b | 3050 | ext4_fsblk_t sb_block; |
ac27a0ec | 3051 | unsigned long offset; |
2b2d6d01 | 3052 | struct ext4_super_block *es; |
ac27a0ec DK |
3053 | struct block_device *bdev; |
3054 | ||
0390131b FM |
3055 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3056 | ||
b31e1552 | 3057 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3058 | if (bdev == NULL) |
3059 | return NULL; | |
3060 | ||
3061 | if (bd_claim(bdev, sb)) { | |
b31e1552 ES |
3062 | ext4_msg(sb, KERN_ERR, |
3063 | "failed to claim external journal device"); | |
9a1c3542 | 3064 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3065 | return NULL; |
3066 | } | |
3067 | ||
3068 | blocksize = sb->s_blocksize; | |
e1defc4f | 3069 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3070 | if (blocksize < hblock) { |
b31e1552 ES |
3071 | ext4_msg(sb, KERN_ERR, |
3072 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3073 | goto out_bdev; |
3074 | } | |
3075 | ||
617ba13b MC |
3076 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3077 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3078 | set_blocksize(bdev, blocksize); |
3079 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3080 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3081 | "external journal"); | |
ac27a0ec DK |
3082 | goto out_bdev; |
3083 | } | |
3084 | ||
617ba13b MC |
3085 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3086 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3087 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3088 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3089 | ext4_msg(sb, KERN_ERR, "external journal has " |
3090 | "bad superblock"); | |
ac27a0ec DK |
3091 | brelse(bh); |
3092 | goto out_bdev; | |
3093 | } | |
3094 | ||
617ba13b | 3095 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3096 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3097 | brelse(bh); |
3098 | goto out_bdev; | |
3099 | } | |
3100 | ||
bd81d8ee | 3101 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3102 | start = sb_block + 1; |
3103 | brelse(bh); /* we're done with the superblock */ | |
3104 | ||
dab291af | 3105 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3106 | start, len, blocksize); |
3107 | if (!journal) { | |
b31e1552 | 3108 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3109 | goto out_bdev; |
3110 | } | |
3111 | journal->j_private = sb; | |
3112 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3113 | wait_on_buffer(journal->j_sb_buffer); | |
3114 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3115 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3116 | goto out_journal; |
3117 | } | |
3118 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3119 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3120 | "user (unsupported) - %d", | |
ac27a0ec DK |
3121 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3122 | goto out_journal; | |
3123 | } | |
617ba13b MC |
3124 | EXT4_SB(sb)->journal_bdev = bdev; |
3125 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3126 | return journal; |
0b8e58a1 | 3127 | |
ac27a0ec | 3128 | out_journal: |
dab291af | 3129 | jbd2_journal_destroy(journal); |
ac27a0ec | 3130 | out_bdev: |
617ba13b | 3131 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3132 | return NULL; |
3133 | } | |
3134 | ||
617ba13b MC |
3135 | static int ext4_load_journal(struct super_block *sb, |
3136 | struct ext4_super_block *es, | |
ac27a0ec DK |
3137 | unsigned long journal_devnum) |
3138 | { | |
3139 | journal_t *journal; | |
3140 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3141 | dev_t journal_dev; | |
3142 | int err = 0; | |
3143 | int really_read_only; | |
3144 | ||
0390131b FM |
3145 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3146 | ||
ac27a0ec DK |
3147 | if (journal_devnum && |
3148 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3149 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3150 | "numbers have changed"); | |
ac27a0ec DK |
3151 | journal_dev = new_decode_dev(journal_devnum); |
3152 | } else | |
3153 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3154 | ||
3155 | really_read_only = bdev_read_only(sb->s_bdev); | |
3156 | ||
3157 | /* | |
3158 | * Are we loading a blank journal or performing recovery after a | |
3159 | * crash? For recovery, we need to check in advance whether we | |
3160 | * can get read-write access to the device. | |
3161 | */ | |
617ba13b | 3162 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3163 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3164 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3165 | "required on readonly filesystem"); | |
ac27a0ec | 3166 | if (really_read_only) { |
b31e1552 ES |
3167 | ext4_msg(sb, KERN_ERR, "write access " |
3168 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3169 | return -EROFS; |
3170 | } | |
b31e1552 ES |
3171 | ext4_msg(sb, KERN_INFO, "write access will " |
3172 | "be enabled during recovery"); | |
ac27a0ec DK |
3173 | } |
3174 | } | |
3175 | ||
3176 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3177 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3178 | "and inode journals!"); | |
ac27a0ec DK |
3179 | return -EINVAL; |
3180 | } | |
3181 | ||
3182 | if (journal_inum) { | |
617ba13b | 3183 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3184 | return -EINVAL; |
3185 | } else { | |
617ba13b | 3186 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3187 | return -EINVAL; |
3188 | } | |
3189 | ||
90576c0b | 3190 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3191 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3192 | |
ac27a0ec | 3193 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3194 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3195 | if (err) { |
b31e1552 | 3196 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3197 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3198 | return err; |
3199 | } | |
3200 | } | |
3201 | ||
617ba13b | 3202 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3203 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3204 | if (!err) |
dab291af | 3205 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3206 | |
3207 | if (err) { | |
b31e1552 | 3208 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3209 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3210 | return err; |
3211 | } | |
3212 | ||
617ba13b MC |
3213 | EXT4_SB(sb)->s_journal = journal; |
3214 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3215 | |
3216 | if (journal_devnum && | |
3217 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3218 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3219 | |
3220 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3221 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3222 | } |
3223 | ||
3224 | return 0; | |
3225 | } | |
3226 | ||
e2d67052 | 3227 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3228 | { |
e2d67052 | 3229 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3230 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3231 | int error = 0; |
ac27a0ec DK |
3232 | |
3233 | if (!sbh) | |
c4be0c1d | 3234 | return error; |
914258bf TT |
3235 | if (buffer_write_io_error(sbh)) { |
3236 | /* | |
3237 | * Oh, dear. A previous attempt to write the | |
3238 | * superblock failed. This could happen because the | |
3239 | * USB device was yanked out. Or it could happen to | |
3240 | * be a transient write error and maybe the block will | |
3241 | * be remapped. Nothing we can do but to retry the | |
3242 | * write and hope for the best. | |
3243 | */ | |
b31e1552 ES |
3244 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3245 | "superblock detected"); | |
914258bf TT |
3246 | clear_buffer_write_io_error(sbh); |
3247 | set_buffer_uptodate(sbh); | |
3248 | } | |
71290b36 TT |
3249 | /* |
3250 | * If the file system is mounted read-only, don't update the | |
3251 | * superblock write time. This avoids updating the superblock | |
3252 | * write time when we are mounting the root file system | |
3253 | * read/only but we need to replay the journal; at that point, | |
3254 | * for people who are east of GMT and who make their clock | |
3255 | * tick in localtime for Windows bug-for-bug compatibility, | |
3256 | * the clock is set in the future, and this will cause e2fsck | |
3257 | * to complain and force a full file system check. | |
3258 | */ | |
3259 | if (!(sb->s_flags & MS_RDONLY)) | |
3260 | es->s_wtime = cpu_to_le32(get_seconds()); | |
afc32f7e TT |
3261 | es->s_kbytes_written = |
3262 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3263 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3264 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3265 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3266 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3267 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3268 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3269 | sb->s_dirt = 0; |
ac27a0ec DK |
3270 | BUFFER_TRACE(sbh, "marking dirty"); |
3271 | mark_buffer_dirty(sbh); | |
914258bf | 3272 | if (sync) { |
c4be0c1d TS |
3273 | error = sync_dirty_buffer(sbh); |
3274 | if (error) | |
3275 | return error; | |
3276 | ||
3277 | error = buffer_write_io_error(sbh); | |
3278 | if (error) { | |
b31e1552 ES |
3279 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
3280 | "superblock"); | |
914258bf TT |
3281 | clear_buffer_write_io_error(sbh); |
3282 | set_buffer_uptodate(sbh); | |
3283 | } | |
3284 | } | |
c4be0c1d | 3285 | return error; |
ac27a0ec DK |
3286 | } |
3287 | ||
ac27a0ec DK |
3288 | /* |
3289 | * Have we just finished recovery? If so, and if we are mounting (or | |
3290 | * remounting) the filesystem readonly, then we will end up with a | |
3291 | * consistent fs on disk. Record that fact. | |
3292 | */ | |
2b2d6d01 TT |
3293 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3294 | struct ext4_super_block *es) | |
ac27a0ec | 3295 | { |
617ba13b | 3296 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3297 | |
0390131b FM |
3298 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3299 | BUG_ON(journal != NULL); | |
3300 | return; | |
3301 | } | |
dab291af | 3302 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3303 | if (jbd2_journal_flush(journal) < 0) |
3304 | goto out; | |
3305 | ||
617ba13b | 3306 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3307 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3308 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 3309 | ext4_commit_super(sb, 1); |
ac27a0ec | 3310 | } |
7ffe1ea8 HK |
3311 | |
3312 | out: | |
dab291af | 3313 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3314 | } |
3315 | ||
3316 | /* | |
3317 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3318 | * has recorded an error from a previous lifetime, move that error to the | |
3319 | * main filesystem now. | |
3320 | */ | |
2b2d6d01 TT |
3321 | static void ext4_clear_journal_err(struct super_block *sb, |
3322 | struct ext4_super_block *es) | |
ac27a0ec DK |
3323 | { |
3324 | journal_t *journal; | |
3325 | int j_errno; | |
3326 | const char *errstr; | |
3327 | ||
0390131b FM |
3328 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3329 | ||
617ba13b | 3330 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3331 | |
3332 | /* | |
3333 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3334 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3335 | */ |
3336 | ||
dab291af | 3337 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3338 | if (j_errno) { |
3339 | char nbuf[16]; | |
3340 | ||
617ba13b | 3341 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 3342 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 3343 | "from previous mount: %s", errstr); |
46e665e9 | 3344 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
3345 | "filesystem check."); |
3346 | ||
617ba13b MC |
3347 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3348 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 3349 | ext4_commit_super(sb, 1); |
ac27a0ec | 3350 | |
dab291af | 3351 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3352 | } |
3353 | } | |
3354 | ||
3355 | /* | |
3356 | * Force the running and committing transactions to commit, | |
3357 | * and wait on the commit. | |
3358 | */ | |
617ba13b | 3359 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3360 | { |
3361 | journal_t *journal; | |
0390131b | 3362 | int ret = 0; |
ac27a0ec DK |
3363 | |
3364 | if (sb->s_flags & MS_RDONLY) | |
3365 | return 0; | |
3366 | ||
617ba13b | 3367 | journal = EXT4_SB(sb)->s_journal; |
7234ab2a | 3368 | if (journal) |
0390131b | 3369 | ret = ext4_journal_force_commit(journal); |
0390131b | 3370 | |
ac27a0ec DK |
3371 | return ret; |
3372 | } | |
3373 | ||
2b2d6d01 | 3374 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3375 | { |
ebc1ac16 | 3376 | lock_super(sb); |
9ca92389 | 3377 | ext4_commit_super(sb, 1); |
ebc1ac16 | 3378 | unlock_super(sb); |
ac27a0ec DK |
3379 | } |
3380 | ||
617ba13b | 3381 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3382 | { |
14ce0cb4 | 3383 | int ret = 0; |
9eddacf9 | 3384 | tid_t target; |
8d5d02e6 | 3385 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3386 | |
9bffad1e | 3387 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
3388 | flush_workqueue(sbi->dio_unwritten_wq); |
3389 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 3390 | if (wait) |
8d5d02e6 | 3391 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 3392 | } |
14ce0cb4 | 3393 | return ret; |
ac27a0ec DK |
3394 | } |
3395 | ||
3396 | /* | |
3397 | * LVM calls this function before a (read-only) snapshot is created. This | |
3398 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3399 | */ | |
c4be0c1d | 3400 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3401 | { |
c4be0c1d TS |
3402 | int error = 0; |
3403 | journal_t *journal; | |
ac27a0ec | 3404 | |
9ca92389 TT |
3405 | if (sb->s_flags & MS_RDONLY) |
3406 | return 0; | |
ac27a0ec | 3407 | |
9ca92389 | 3408 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 3409 | |
9ca92389 TT |
3410 | /* Now we set up the journal barrier. */ |
3411 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 3412 | |
9ca92389 TT |
3413 | /* |
3414 | * Don't clear the needs_recovery flag if we failed to flush | |
3415 | * the journal. | |
3416 | */ | |
3417 | error = jbd2_journal_flush(journal); | |
3418 | if (error < 0) { | |
3419 | out: | |
3420 | jbd2_journal_unlock_updates(journal); | |
3421 | return error; | |
ac27a0ec | 3422 | } |
9ca92389 TT |
3423 | |
3424 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
3425 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3426 | error = ext4_commit_super(sb, 1); | |
3427 | if (error) | |
3428 | goto out; | |
c4be0c1d | 3429 | return 0; |
ac27a0ec DK |
3430 | } |
3431 | ||
3432 | /* | |
3433 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3434 | * flag here, even though the filesystem is not technically dirty yet. | |
3435 | */ | |
c4be0c1d | 3436 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3437 | { |
9ca92389 TT |
3438 | if (sb->s_flags & MS_RDONLY) |
3439 | return 0; | |
3440 | ||
3441 | lock_super(sb); | |
3442 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
3443 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3444 | ext4_commit_super(sb, 1); | |
3445 | unlock_super(sb); | |
3446 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
c4be0c1d | 3447 | return 0; |
ac27a0ec DK |
3448 | } |
3449 | ||
2b2d6d01 | 3450 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3451 | { |
2b2d6d01 | 3452 | struct ext4_super_block *es; |
617ba13b MC |
3453 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3454 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3455 | unsigned long old_sb_flags; |
617ba13b | 3456 | struct ext4_mount_options old_opts; |
8a266467 | 3457 | ext4_group_t g; |
b3881f74 | 3458 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3459 | int err; |
3460 | #ifdef CONFIG_QUOTA | |
3461 | int i; | |
3462 | #endif | |
3463 | ||
337eb00a AIB |
3464 | lock_kernel(); |
3465 | ||
ac27a0ec | 3466 | /* Store the original options */ |
bbd6851a | 3467 | lock_super(sb); |
ac27a0ec DK |
3468 | old_sb_flags = sb->s_flags; |
3469 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3470 | old_opts.s_resuid = sbi->s_resuid; | |
3471 | old_opts.s_resgid = sbi->s_resgid; | |
3472 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3473 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3474 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3475 | #ifdef CONFIG_QUOTA |
3476 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3477 | for (i = 0; i < MAXQUOTAS; i++) | |
3478 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3479 | #endif | |
b3881f74 TT |
3480 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3481 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3482 | |
3483 | /* | |
3484 | * Allow the "check" option to be passed as a remount option. | |
3485 | */ | |
b3881f74 TT |
3486 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3487 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3488 | err = -EINVAL; |
3489 | goto restore_opts; | |
3490 | } | |
3491 | ||
4ab2f15b | 3492 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
46e665e9 | 3493 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3494 | |
3495 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3496 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3497 | |
3498 | es = sbi->s_es; | |
3499 | ||
b3881f74 | 3500 | if (sbi->s_journal) { |
0390131b | 3501 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3502 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3503 | } | |
ac27a0ec DK |
3504 | |
3505 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3506 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 3507 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
3508 | err = -EROFS; |
3509 | goto restore_opts; | |
3510 | } | |
3511 | ||
3512 | if (*flags & MS_RDONLY) { | |
3513 | /* | |
3514 | * First of all, the unconditional stuff we have to do | |
3515 | * to disable replay of the journal when we next remount | |
3516 | */ | |
3517 | sb->s_flags |= MS_RDONLY; | |
3518 | ||
3519 | /* | |
3520 | * OK, test if we are remounting a valid rw partition | |
3521 | * readonly, and if so set the rdonly flag and then | |
3522 | * mark the partition as valid again. | |
3523 | */ | |
617ba13b MC |
3524 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3525 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3526 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3527 | ||
a63c9eb2 | 3528 | if (sbi->s_journal) |
0390131b | 3529 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 3530 | } else { |
a13fb1a4 ES |
3531 | /* Make sure we can mount this feature set readwrite */ |
3532 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
3533 | err = -EROFS; |
3534 | goto restore_opts; | |
3535 | } | |
8a266467 TT |
3536 | /* |
3537 | * Make sure the group descriptor checksums | |
0b8e58a1 | 3538 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
3539 | */ |
3540 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3541 | struct ext4_group_desc *gdp = | |
3542 | ext4_get_group_desc(sb, g, NULL); | |
3543 | ||
3544 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
3545 | ext4_msg(sb, KERN_ERR, |
3546 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
3547 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3548 | le16_to_cpu(gdp->bg_checksum)); | |
3549 | err = -EINVAL; | |
3550 | goto restore_opts; | |
3551 | } | |
3552 | } | |
3553 | ||
ead6596b ES |
3554 | /* |
3555 | * If we have an unprocessed orphan list hanging | |
3556 | * around from a previously readonly bdev mount, | |
3557 | * require a full umount/remount for now. | |
3558 | */ | |
3559 | if (es->s_last_orphan) { | |
b31e1552 | 3560 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
3561 | "remount RDWR because of unprocessed " |
3562 | "orphan inode list. Please " | |
b31e1552 | 3563 | "umount/remount instead"); |
ead6596b ES |
3564 | err = -EINVAL; |
3565 | goto restore_opts; | |
3566 | } | |
3567 | ||
ac27a0ec DK |
3568 | /* |
3569 | * Mounting a RDONLY partition read-write, so reread | |
3570 | * and store the current valid flag. (It may have | |
3571 | * been changed by e2fsck since we originally mounted | |
3572 | * the partition.) | |
3573 | */ | |
0390131b FM |
3574 | if (sbi->s_journal) |
3575 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3576 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3577 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3578 | goto restore_opts; |
2b2d6d01 | 3579 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3580 | sb->s_flags &= ~MS_RDONLY; |
3581 | } | |
3582 | } | |
6fd058f7 | 3583 | ext4_setup_system_zone(sb); |
0390131b | 3584 | if (sbi->s_journal == NULL) |
e2d67052 | 3585 | ext4_commit_super(sb, 1); |
0390131b | 3586 | |
ac27a0ec DK |
3587 | #ifdef CONFIG_QUOTA |
3588 | /* Release old quota file names */ | |
3589 | for (i = 0; i < MAXQUOTAS; i++) | |
3590 | if (old_opts.s_qf_names[i] && | |
3591 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3592 | kfree(old_opts.s_qf_names[i]); | |
3593 | #endif | |
bbd6851a | 3594 | unlock_super(sb); |
337eb00a | 3595 | unlock_kernel(); |
ac27a0ec | 3596 | return 0; |
0b8e58a1 | 3597 | |
ac27a0ec DK |
3598 | restore_opts: |
3599 | sb->s_flags = old_sb_flags; | |
3600 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3601 | sbi->s_resuid = old_opts.s_resuid; | |
3602 | sbi->s_resgid = old_opts.s_resgid; | |
3603 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3604 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3605 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3606 | #ifdef CONFIG_QUOTA |
3607 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3608 | for (i = 0; i < MAXQUOTAS; i++) { | |
3609 | if (sbi->s_qf_names[i] && | |
3610 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3611 | kfree(sbi->s_qf_names[i]); | |
3612 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3613 | } | |
3614 | #endif | |
bbd6851a | 3615 | unlock_super(sb); |
337eb00a | 3616 | unlock_kernel(); |
ac27a0ec DK |
3617 | return err; |
3618 | } | |
3619 | ||
2b2d6d01 | 3620 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3621 | { |
3622 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3623 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3624 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3625 | u64 fsid; |
ac27a0ec | 3626 | |
5e70030d BP |
3627 | if (test_opt(sb, MINIX_DF)) { |
3628 | sbi->s_overhead_last = 0; | |
6bc9feff | 3629 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 3630 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 3631 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3632 | |
3633 | /* | |
5e70030d BP |
3634 | * Compute the overhead (FS structures). This is constant |
3635 | * for a given filesystem unless the number of block groups | |
3636 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3637 | */ |
3638 | ||
3639 | /* | |
3640 | * All of the blocks before first_data_block are | |
3641 | * overhead | |
3642 | */ | |
3643 | overhead = le32_to_cpu(es->s_first_data_block); | |
3644 | ||
3645 | /* | |
3646 | * Add the overhead attributed to the superblock and | |
3647 | * block group descriptors. If the sparse superblocks | |
3648 | * feature is turned on, then not all groups have this. | |
3649 | */ | |
3650 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3651 | overhead += ext4_bg_has_super(sb, i) + |
3652 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3653 | cond_resched(); |
3654 | } | |
3655 | ||
3656 | /* | |
3657 | * Every block group has an inode bitmap, a block | |
3658 | * bitmap, and an inode table. | |
3659 | */ | |
5e70030d BP |
3660 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3661 | sbi->s_overhead_last = overhead; | |
3662 | smp_wmb(); | |
6bc9feff | 3663 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3664 | } |
3665 | ||
617ba13b | 3666 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3667 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3668 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3669 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3670 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3671 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3672 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3673 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3674 | buf->f_bavail = 0; |
3675 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3676 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3677 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3678 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3679 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3680 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3681 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3682 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 3683 | |
ac27a0ec DK |
3684 | return 0; |
3685 | } | |
3686 | ||
0b8e58a1 AD |
3687 | /* Helper function for writing quotas on sync - we need to start transaction |
3688 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 3689 | * Process 1 Process 2 |
617ba13b | 3690 | * ext4_create() quota_sync() |
a269eb18 JK |
3691 | * jbd2_journal_start() write_dquot() |
3692 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3693 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3694 | * |
3695 | */ | |
3696 | ||
3697 | #ifdef CONFIG_QUOTA | |
3698 | ||
3699 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3700 | { | |
3701 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3702 | } | |
3703 | ||
617ba13b | 3704 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3705 | { |
3706 | int ret, err; | |
3707 | handle_t *handle; | |
3708 | struct inode *inode; | |
3709 | ||
3710 | inode = dquot_to_inode(dquot); | |
617ba13b | 3711 | handle = ext4_journal_start(inode, |
0b8e58a1 | 3712 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3713 | if (IS_ERR(handle)) |
3714 | return PTR_ERR(handle); | |
3715 | ret = dquot_commit(dquot); | |
617ba13b | 3716 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3717 | if (!ret) |
3718 | ret = err; | |
3719 | return ret; | |
3720 | } | |
3721 | ||
617ba13b | 3722 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3723 | { |
3724 | int ret, err; | |
3725 | handle_t *handle; | |
3726 | ||
617ba13b | 3727 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3728 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3729 | if (IS_ERR(handle)) |
3730 | return PTR_ERR(handle); | |
3731 | ret = dquot_acquire(dquot); | |
617ba13b | 3732 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3733 | if (!ret) |
3734 | ret = err; | |
3735 | return ret; | |
3736 | } | |
3737 | ||
617ba13b | 3738 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3739 | { |
3740 | int ret, err; | |
3741 | handle_t *handle; | |
3742 | ||
617ba13b | 3743 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3744 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
3745 | if (IS_ERR(handle)) { |
3746 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3747 | dquot_release(dquot); | |
ac27a0ec | 3748 | return PTR_ERR(handle); |
9c3013e9 | 3749 | } |
ac27a0ec | 3750 | ret = dquot_release(dquot); |
617ba13b | 3751 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3752 | if (!ret) |
3753 | ret = err; | |
3754 | return ret; | |
3755 | } | |
3756 | ||
617ba13b | 3757 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3758 | { |
2c8be6b2 | 3759 | /* Are we journaling quotas? */ |
617ba13b MC |
3760 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3761 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3762 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3763 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3764 | } else { |
3765 | return dquot_mark_dquot_dirty(dquot); | |
3766 | } | |
3767 | } | |
3768 | ||
617ba13b | 3769 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3770 | { |
3771 | int ret, err; | |
3772 | handle_t *handle; | |
3773 | ||
3774 | /* Data block + inode block */ | |
617ba13b | 3775 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3776 | if (IS_ERR(handle)) |
3777 | return PTR_ERR(handle); | |
3778 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3779 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3780 | if (!ret) |
3781 | ret = err; | |
3782 | return ret; | |
3783 | } | |
3784 | ||
3785 | /* | |
3786 | * Turn on quotas during mount time - we need to find | |
3787 | * the quota file and such... | |
3788 | */ | |
617ba13b | 3789 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3790 | { |
617ba13b | 3791 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
0b8e58a1 | 3792 | EXT4_SB(sb)->s_jquota_fmt, type); |
ac27a0ec DK |
3793 | } |
3794 | ||
3795 | /* | |
3796 | * Standard function to be called on quota_on | |
3797 | */ | |
617ba13b | 3798 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3799 | char *name, int remount) |
ac27a0ec DK |
3800 | { |
3801 | int err; | |
8264613d | 3802 | struct path path; |
ac27a0ec DK |
3803 | |
3804 | if (!test_opt(sb, QUOTA)) | |
3805 | return -EINVAL; | |
8264613d | 3806 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3807 | if (remount) |
8264613d | 3808 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3809 | |
8264613d | 3810 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3811 | if (err) |
3812 | return err; | |
0623543b | 3813 | |
ac27a0ec | 3814 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3815 | if (path.mnt->mnt_sb != sb) { |
3816 | path_put(&path); | |
ac27a0ec DK |
3817 | return -EXDEV; |
3818 | } | |
0623543b JK |
3819 | /* Journaling quota? */ |
3820 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3821 | /* Quotafile not in fs root? */ |
8264613d | 3822 | if (path.dentry->d_parent != sb->s_root) |
b31e1552 ES |
3823 | ext4_msg(sb, KERN_WARNING, |
3824 | "Quota file not on filesystem root. " | |
3825 | "Journaled quota will not work"); | |
2b2d6d01 | 3826 | } |
0623543b JK |
3827 | |
3828 | /* | |
3829 | * When we journal data on quota file, we have to flush journal to see | |
3830 | * all updates to the file when we bypass pagecache... | |
3831 | */ | |
0390131b FM |
3832 | if (EXT4_SB(sb)->s_journal && |
3833 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3834 | /* |
3835 | * We don't need to lock updates but journal_flush() could | |
3836 | * otherwise be livelocked... | |
3837 | */ | |
3838 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3839 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3840 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3841 | if (err) { |
8264613d | 3842 | path_put(&path); |
7ffe1ea8 HK |
3843 | return err; |
3844 | } | |
0623543b JK |
3845 | } |
3846 | ||
8264613d AV |
3847 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3848 | path_put(&path); | |
77e69dac | 3849 | return err; |
ac27a0ec DK |
3850 | } |
3851 | ||
3852 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3853 | * acquiring the locks... As quota files are never truncated and quota code | |
3854 | * itself serializes the operations (and noone else should touch the files) | |
3855 | * we don't have to be afraid of races */ | |
617ba13b | 3856 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3857 | size_t len, loff_t off) |
3858 | { | |
3859 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3860 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3861 | int err = 0; |
3862 | int offset = off & (sb->s_blocksize - 1); | |
3863 | int tocopy; | |
3864 | size_t toread; | |
3865 | struct buffer_head *bh; | |
3866 | loff_t i_size = i_size_read(inode); | |
3867 | ||
3868 | if (off > i_size) | |
3869 | return 0; | |
3870 | if (off+len > i_size) | |
3871 | len = i_size-off; | |
3872 | toread = len; | |
3873 | while (toread > 0) { | |
3874 | tocopy = sb->s_blocksize - offset < toread ? | |
3875 | sb->s_blocksize - offset : toread; | |
617ba13b | 3876 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3877 | if (err) |
3878 | return err; | |
3879 | if (!bh) /* A hole? */ | |
3880 | memset(data, 0, tocopy); | |
3881 | else | |
3882 | memcpy(data, bh->b_data+offset, tocopy); | |
3883 | brelse(bh); | |
3884 | offset = 0; | |
3885 | toread -= tocopy; | |
3886 | data += tocopy; | |
3887 | blk++; | |
3888 | } | |
3889 | return len; | |
3890 | } | |
3891 | ||
3892 | /* Write to quotafile (we know the transaction is already started and has | |
3893 | * enough credits) */ | |
617ba13b | 3894 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3895 | const char *data, size_t len, loff_t off) |
3896 | { | |
3897 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3898 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3899 | int err = 0; |
3900 | int offset = off & (sb->s_blocksize - 1); | |
3901 | int tocopy; | |
617ba13b | 3902 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3903 | size_t towrite = len; |
3904 | struct buffer_head *bh; | |
3905 | handle_t *handle = journal_current_handle(); | |
3906 | ||
0390131b | 3907 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
3908 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
3909 | " cancelled because transaction is not started", | |
9c3013e9 JK |
3910 | (unsigned long long)off, (unsigned long long)len); |
3911 | return -EIO; | |
3912 | } | |
ac27a0ec DK |
3913 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3914 | while (towrite > 0) { | |
3915 | tocopy = sb->s_blocksize - offset < towrite ? | |
3916 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3917 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3918 | if (!bh) |
3919 | goto out; | |
3920 | if (journal_quota) { | |
617ba13b | 3921 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3922 | if (err) { |
3923 | brelse(bh); | |
3924 | goto out; | |
3925 | } | |
3926 | } | |
3927 | lock_buffer(bh); | |
3928 | memcpy(bh->b_data+offset, data, tocopy); | |
3929 | flush_dcache_page(bh->b_page); | |
3930 | unlock_buffer(bh); | |
3931 | if (journal_quota) | |
0390131b | 3932 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3933 | else { |
3934 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3935 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3936 | mark_buffer_dirty(bh); |
3937 | } | |
3938 | brelse(bh); | |
3939 | if (err) | |
3940 | goto out; | |
3941 | offset = 0; | |
3942 | towrite -= tocopy; | |
3943 | data += tocopy; | |
3944 | blk++; | |
3945 | } | |
3946 | out: | |
4d04e4fb JK |
3947 | if (len == towrite) { |
3948 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3949 | return err; |
4d04e4fb | 3950 | } |
ac27a0ec DK |
3951 | if (inode->i_size < off+len-towrite) { |
3952 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3953 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3954 | } |
ac27a0ec | 3955 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3956 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3957 | mutex_unlock(&inode->i_mutex); |
3958 | return len - towrite; | |
3959 | } | |
3960 | ||
3961 | #endif | |
3962 | ||
0b8e58a1 AD |
3963 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
3964 | const char *dev_name, void *data, struct vfsmount *mnt) | |
ac27a0ec | 3965 | { |
0b8e58a1 | 3966 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
ac27a0ec DK |
3967 | } |
3968 | ||
03010a33 TT |
3969 | static struct file_system_type ext4_fs_type = { |
3970 | .owner = THIS_MODULE, | |
3971 | .name = "ext4", | |
3972 | .get_sb = ext4_get_sb, | |
3973 | .kill_sb = kill_block_super, | |
3974 | .fs_flags = FS_REQUIRES_DEV, | |
3975 | }; | |
3976 | ||
617ba13b | 3977 | static int __init init_ext4_fs(void) |
ac27a0ec | 3978 | { |
c9de560d AT |
3979 | int err; |
3980 | ||
6fd058f7 TT |
3981 | err = init_ext4_system_zone(); |
3982 | if (err) | |
3983 | return err; | |
3197ebdb TT |
3984 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
3985 | if (!ext4_kset) | |
6fd058f7 | 3986 | goto out4; |
9f6200bb | 3987 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3988 | err = init_ext4_mballoc(); |
ac27a0ec | 3989 | if (err) |
6fd058f7 | 3990 | goto out3; |
c9de560d AT |
3991 | |
3992 | err = init_ext4_xattr(); | |
3993 | if (err) | |
3994 | goto out2; | |
ac27a0ec DK |
3995 | err = init_inodecache(); |
3996 | if (err) | |
3997 | goto out1; | |
03010a33 | 3998 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3999 | if (err) |
4000 | goto out; | |
4001 | return 0; | |
4002 | out: | |
4003 | destroy_inodecache(); | |
4004 | out1: | |
617ba13b | 4005 | exit_ext4_xattr(); |
c9de560d AT |
4006 | out2: |
4007 | exit_ext4_mballoc(); | |
6fd058f7 TT |
4008 | out3: |
4009 | remove_proc_entry("fs/ext4", NULL); | |
4010 | kset_unregister(ext4_kset); | |
4011 | out4: | |
4012 | exit_ext4_system_zone(); | |
ac27a0ec DK |
4013 | return err; |
4014 | } | |
4015 | ||
617ba13b | 4016 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 4017 | { |
03010a33 | 4018 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4019 | destroy_inodecache(); |
617ba13b | 4020 | exit_ext4_xattr(); |
c9de560d | 4021 | exit_ext4_mballoc(); |
9f6200bb | 4022 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4023 | kset_unregister(ext4_kset); |
6fd058f7 | 4024 | exit_ext4_system_zone(); |
ac27a0ec DK |
4025 | } |
4026 | ||
4027 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4028 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4029 | MODULE_LICENSE("GPL"); |
617ba13b MC |
4030 | module_init(init_ext4_fs) |
4031 | module_exit(exit_ext4_fs) |