Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
dab291af | 23 | #include <linux/jbd2.h> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/parser.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/buffer_head.h> | |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
1330593e | 37 | #include <linux/log2.h> |
717d50e4 | 38 | #include <linux/crc16.h> |
ac27a0ec DK |
39 | #include <asm/uaccess.h> |
40 | ||
3dcf5451 CH |
41 | #include "ext4.h" |
42 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
43 | #include "xattr.h" |
44 | #include "acl.h" | |
45 | #include "namei.h" | |
717d50e4 | 46 | #include "group.h" |
ac27a0ec | 47 | |
617ba13b | 48 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 49 | unsigned long journal_devnum); |
617ba13b | 50 | static int ext4_create_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 51 | unsigned int); |
617ba13b MC |
52 | static void ext4_commit_super (struct super_block * sb, |
53 | struct ext4_super_block * es, | |
ac27a0ec | 54 | int sync); |
617ba13b MC |
55 | static void ext4_mark_recovery_complete(struct super_block * sb, |
56 | struct ext4_super_block * es); | |
57 | static void ext4_clear_journal_err(struct super_block * sb, | |
58 | struct ext4_super_block * es); | |
59 | static int ext4_sync_fs(struct super_block *sb, int wait); | |
60 | static const char *ext4_decode_error(struct super_block * sb, int errno, | |
ac27a0ec | 61 | char nbuf[16]); |
617ba13b MC |
62 | static int ext4_remount (struct super_block * sb, int * flags, char * data); |
63 | static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); | |
64 | static void ext4_unlockfs(struct super_block *sb); | |
65 | static void ext4_write_super (struct super_block * sb); | |
66 | static void ext4_write_super_lockfs(struct super_block *sb); | |
ac27a0ec | 67 | |
bd81d8ee | 68 | |
8fadc143 AR |
69 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
70 | struct ext4_group_desc *bg) | |
bd81d8ee | 71 | { |
3a14589c | 72 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 73 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 74 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
75 | } |
76 | ||
8fadc143 AR |
77 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
78 | struct ext4_group_desc *bg) | |
bd81d8ee | 79 | { |
5272f837 | 80 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 81 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 82 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
83 | } |
84 | ||
8fadc143 AR |
85 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
86 | struct ext4_group_desc *bg) | |
bd81d8ee | 87 | { |
5272f837 | 88 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 89 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 90 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
91 | } |
92 | ||
8fadc143 AR |
93 | void ext4_block_bitmap_set(struct super_block *sb, |
94 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 95 | { |
3a14589c | 96 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
97 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
98 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
99 | } |
100 | ||
8fadc143 AR |
101 | void ext4_inode_bitmap_set(struct super_block *sb, |
102 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 103 | { |
5272f837 | 104 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
105 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
106 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
107 | } |
108 | ||
8fadc143 AR |
109 | void ext4_inode_table_set(struct super_block *sb, |
110 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 111 | { |
5272f837 | 112 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
113 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
114 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
115 | } |
116 | ||
ac27a0ec | 117 | /* |
dab291af | 118 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
119 | * |
120 | * The only special thing we need to do here is to make sure that all | |
121 | * journal_end calls result in the superblock being marked dirty, so | |
122 | * that sync() will call the filesystem's write_super callback if | |
123 | * appropriate. | |
124 | */ | |
617ba13b | 125 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
126 | { |
127 | journal_t *journal; | |
128 | ||
129 | if (sb->s_flags & MS_RDONLY) | |
130 | return ERR_PTR(-EROFS); | |
131 | ||
132 | /* Special case here: if the journal has aborted behind our | |
133 | * backs (eg. EIO in the commit thread), then we still need to | |
134 | * take the FS itself readonly cleanly. */ | |
617ba13b | 135 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 136 | if (is_journal_aborted(journal)) { |
46e665e9 | 137 | ext4_abort(sb, __func__, |
ac27a0ec DK |
138 | "Detected aborted journal"); |
139 | return ERR_PTR(-EROFS); | |
140 | } | |
141 | ||
dab291af | 142 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
143 | } |
144 | ||
145 | /* | |
146 | * The only special thing we need to do here is to make sure that all | |
dab291af | 147 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
148 | * that sync() will call the filesystem's write_super callback if |
149 | * appropriate. | |
150 | */ | |
617ba13b | 151 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
152 | { |
153 | struct super_block *sb; | |
154 | int err; | |
155 | int rc; | |
156 | ||
157 | sb = handle->h_transaction->t_journal->j_private; | |
158 | err = handle->h_err; | |
dab291af | 159 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
160 | |
161 | if (!err) | |
162 | err = rc; | |
163 | if (err) | |
617ba13b | 164 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
165 | return err; |
166 | } | |
167 | ||
617ba13b | 168 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
169 | struct buffer_head *bh, handle_t *handle, int err) |
170 | { | |
171 | char nbuf[16]; | |
617ba13b | 172 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec DK |
173 | |
174 | if (bh) | |
175 | BUFFER_TRACE(bh, "abort"); | |
176 | ||
177 | if (!handle->h_err) | |
178 | handle->h_err = err; | |
179 | ||
180 | if (is_handle_aborted(handle)) | |
181 | return; | |
182 | ||
183 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
184 | caller, errstr, err_fn); | |
185 | ||
dab291af | 186 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
187 | } |
188 | ||
189 | /* Deal with the reporting of failure conditions on a filesystem such as | |
190 | * inconsistencies detected or read IO failures. | |
191 | * | |
192 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 193 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
194 | * write ordering constraints on the superblock which prevent us from |
195 | * writing it out straight away; and given that the journal is about to | |
196 | * be aborted, we can't rely on the current, or future, transactions to | |
197 | * write out the superblock safely. | |
198 | * | |
dab291af | 199 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
200 | * the journal instead. On recovery, the journal will compain about |
201 | * that error until we've noted it down and cleared it. | |
202 | */ | |
203 | ||
617ba13b | 204 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 205 | { |
617ba13b | 206 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 207 | |
617ba13b MC |
208 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
209 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
210 | |
211 | if (sb->s_flags & MS_RDONLY) | |
212 | return; | |
213 | ||
214 | if (!test_opt (sb, ERRORS_CONT)) { | |
617ba13b | 215 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 216 | |
617ba13b | 217 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 218 | if (journal) |
dab291af | 219 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec DK |
220 | } |
221 | if (test_opt (sb, ERRORS_RO)) { | |
222 | printk (KERN_CRIT "Remounting filesystem read-only\n"); | |
223 | sb->s_flags |= MS_RDONLY; | |
224 | } | |
617ba13b | 225 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 226 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 227 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
228 | sb->s_id); |
229 | } | |
230 | ||
617ba13b | 231 | void ext4_error (struct super_block * sb, const char * function, |
ac27a0ec DK |
232 | const char * fmt, ...) |
233 | { | |
234 | va_list args; | |
235 | ||
236 | va_start(args, fmt); | |
617ba13b | 237 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); |
ac27a0ec DK |
238 | vprintk(fmt, args); |
239 | printk("\n"); | |
240 | va_end(args); | |
241 | ||
617ba13b | 242 | ext4_handle_error(sb); |
ac27a0ec DK |
243 | } |
244 | ||
617ba13b | 245 | static const char *ext4_decode_error(struct super_block * sb, int errno, |
ac27a0ec DK |
246 | char nbuf[16]) |
247 | { | |
248 | char *errstr = NULL; | |
249 | ||
250 | switch (errno) { | |
251 | case -EIO: | |
252 | errstr = "IO failure"; | |
253 | break; | |
254 | case -ENOMEM: | |
255 | errstr = "Out of memory"; | |
256 | break; | |
257 | case -EROFS: | |
dab291af | 258 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
259 | errstr = "Journal has aborted"; |
260 | else | |
261 | errstr = "Readonly filesystem"; | |
262 | break; | |
263 | default: | |
264 | /* If the caller passed in an extra buffer for unknown | |
265 | * errors, textualise them now. Else we just return | |
266 | * NULL. */ | |
267 | if (nbuf) { | |
268 | /* Check for truncated error codes... */ | |
269 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
270 | errstr = nbuf; | |
271 | } | |
272 | break; | |
273 | } | |
274 | ||
275 | return errstr; | |
276 | } | |
277 | ||
617ba13b | 278 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
279 | * automatically and invokes the appropriate error response. */ |
280 | ||
617ba13b | 281 | void __ext4_std_error (struct super_block * sb, const char * function, |
ac27a0ec DK |
282 | int errno) |
283 | { | |
284 | char nbuf[16]; | |
285 | const char *errstr; | |
286 | ||
287 | /* Special case: if the error is EROFS, and we're not already | |
288 | * inside a transaction, then there's really no point in logging | |
289 | * an error. */ | |
290 | if (errno == -EROFS && journal_current_handle() == NULL && | |
291 | (sb->s_flags & MS_RDONLY)) | |
292 | return; | |
293 | ||
617ba13b MC |
294 | errstr = ext4_decode_error(sb, errno, nbuf); |
295 | printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", | |
ac27a0ec DK |
296 | sb->s_id, function, errstr); |
297 | ||
617ba13b | 298 | ext4_handle_error(sb); |
ac27a0ec DK |
299 | } |
300 | ||
301 | /* | |
617ba13b | 302 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
303 | * abort function may be used to deal with unrecoverable failures such |
304 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
305 | * | |
306 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
307 | * unless the error response on the fs has been set to panic in which | |
308 | * case we take the easy way out and panic immediately. | |
309 | */ | |
310 | ||
617ba13b | 311 | void ext4_abort (struct super_block * sb, const char * function, |
ac27a0ec DK |
312 | const char * fmt, ...) |
313 | { | |
314 | va_list args; | |
315 | ||
617ba13b | 316 | printk (KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
317 | |
318 | va_start(args, fmt); | |
617ba13b | 319 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); |
ac27a0ec DK |
320 | vprintk(fmt, args); |
321 | printk("\n"); | |
322 | va_end(args); | |
323 | ||
324 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 325 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
326 | |
327 | if (sb->s_flags & MS_RDONLY) | |
328 | return; | |
329 | ||
330 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 331 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 332 | sb->s_flags |= MS_RDONLY; |
617ba13b | 333 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
dab291af | 334 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
ac27a0ec DK |
335 | } |
336 | ||
617ba13b | 337 | void ext4_warning (struct super_block * sb, const char * function, |
ac27a0ec DK |
338 | const char * fmt, ...) |
339 | { | |
340 | va_list args; | |
341 | ||
342 | va_start(args, fmt); | |
617ba13b | 343 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
344 | sb->s_id, function); |
345 | vprintk(fmt, args); | |
346 | printk("\n"); | |
347 | va_end(args); | |
348 | } | |
349 | ||
617ba13b | 350 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 351 | { |
617ba13b | 352 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 353 | |
617ba13b | 354 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
355 | return; |
356 | ||
46e665e9 | 357 | ext4_warning(sb, __func__, |
ac27a0ec DK |
358 | "updating to rev %d because of new feature flag, " |
359 | "running e2fsck is recommended", | |
617ba13b | 360 | EXT4_DYNAMIC_REV); |
ac27a0ec | 361 | |
617ba13b MC |
362 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
363 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
364 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
365 | /* leave es->s_feature_*compat flags alone */ |
366 | /* es->s_uuid will be set by e2fsck if empty */ | |
367 | ||
368 | /* | |
369 | * The rest of the superblock fields should be zero, and if not it | |
370 | * means they are likely already in use, so leave them alone. We | |
371 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
372 | */ | |
373 | } | |
374 | ||
99e6f829 AK |
375 | int ext4_update_compat_feature(handle_t *handle, |
376 | struct super_block *sb, __u32 compat) | |
377 | { | |
378 | int err = 0; | |
379 | if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { | |
380 | err = ext4_journal_get_write_access(handle, | |
381 | EXT4_SB(sb)->s_sbh); | |
382 | if (err) | |
383 | return err; | |
384 | EXT4_SET_COMPAT_FEATURE(sb, compat); | |
385 | sb->s_dirt = 1; | |
386 | handle->h_sync = 1; | |
387 | BUFFER_TRACE(EXT4_SB(sb)->s_sbh, | |
388 | "call ext4_journal_dirty_met adata"); | |
389 | err = ext4_journal_dirty_metadata(handle, | |
390 | EXT4_SB(sb)->s_sbh); | |
391 | } | |
392 | return err; | |
393 | } | |
394 | ||
395 | int ext4_update_rocompat_feature(handle_t *handle, | |
396 | struct super_block *sb, __u32 rocompat) | |
397 | { | |
398 | int err = 0; | |
399 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { | |
400 | err = ext4_journal_get_write_access(handle, | |
401 | EXT4_SB(sb)->s_sbh); | |
402 | if (err) | |
403 | return err; | |
404 | EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); | |
405 | sb->s_dirt = 1; | |
406 | handle->h_sync = 1; | |
407 | BUFFER_TRACE(EXT4_SB(sb)->s_sbh, | |
408 | "call ext4_journal_dirty_met adata"); | |
409 | err = ext4_journal_dirty_metadata(handle, | |
410 | EXT4_SB(sb)->s_sbh); | |
411 | } | |
412 | return err; | |
413 | } | |
414 | ||
415 | int ext4_update_incompat_feature(handle_t *handle, | |
416 | struct super_block *sb, __u32 incompat) | |
417 | { | |
418 | int err = 0; | |
419 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { | |
420 | err = ext4_journal_get_write_access(handle, | |
421 | EXT4_SB(sb)->s_sbh); | |
422 | if (err) | |
423 | return err; | |
424 | EXT4_SET_INCOMPAT_FEATURE(sb, incompat); | |
425 | sb->s_dirt = 1; | |
426 | handle->h_sync = 1; | |
427 | BUFFER_TRACE(EXT4_SB(sb)->s_sbh, | |
428 | "call ext4_journal_dirty_met adata"); | |
429 | err = ext4_journal_dirty_metadata(handle, | |
430 | EXT4_SB(sb)->s_sbh); | |
431 | } | |
432 | return err; | |
433 | } | |
434 | ||
ac27a0ec DK |
435 | /* |
436 | * Open the external journal device | |
437 | */ | |
617ba13b | 438 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
439 | { |
440 | struct block_device *bdev; | |
441 | char b[BDEVNAME_SIZE]; | |
442 | ||
443 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
444 | if (IS_ERR(bdev)) | |
445 | goto fail; | |
446 | return bdev; | |
447 | ||
448 | fail: | |
617ba13b | 449 | printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
450 | __bdevname(dev, b), PTR_ERR(bdev)); |
451 | return NULL; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Release the journal device | |
456 | */ | |
617ba13b | 457 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
458 | { |
459 | bd_release(bdev); | |
460 | return blkdev_put(bdev); | |
461 | } | |
462 | ||
617ba13b | 463 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
464 | { |
465 | struct block_device *bdev; | |
466 | int ret = -ENODEV; | |
467 | ||
468 | bdev = sbi->journal_bdev; | |
469 | if (bdev) { | |
617ba13b | 470 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
471 | sbi->journal_bdev = NULL; |
472 | } | |
473 | return ret; | |
474 | } | |
475 | ||
476 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
477 | { | |
617ba13b | 478 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
479 | } |
480 | ||
617ba13b | 481 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
482 | { |
483 | struct list_head *l; | |
484 | ||
485 | printk(KERN_ERR "sb orphan head is %d\n", | |
486 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
487 | ||
488 | printk(KERN_ERR "sb_info orphan list:\n"); | |
489 | list_for_each(l, &sbi->s_orphan) { | |
490 | struct inode *inode = orphan_list_entry(l); | |
491 | printk(KERN_ERR " " | |
492 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
493 | inode->i_sb->s_id, inode->i_ino, inode, | |
494 | inode->i_mode, inode->i_nlink, | |
495 | NEXT_ORPHAN(inode)); | |
496 | } | |
497 | } | |
498 | ||
617ba13b | 499 | static void ext4_put_super (struct super_block * sb) |
ac27a0ec | 500 | { |
617ba13b MC |
501 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
502 | struct ext4_super_block *es = sbi->s_es; | |
ac27a0ec DK |
503 | int i; |
504 | ||
c9de560d | 505 | ext4_mb_release(sb); |
a86c6181 | 506 | ext4_ext_release(sb); |
617ba13b | 507 | ext4_xattr_put_super(sb); |
dab291af | 508 | jbd2_journal_destroy(sbi->s_journal); |
ac27a0ec | 509 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 510 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec DK |
511 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
512 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
513 | mark_buffer_dirty(sbi->s_sbh); | |
617ba13b | 514 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
515 | } |
516 | ||
517 | for (i = 0; i < sbi->s_gdb_count; i++) | |
518 | brelse(sbi->s_group_desc[i]); | |
519 | kfree(sbi->s_group_desc); | |
520 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
521 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
522 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
523 | brelse(sbi->s_sbh); | |
524 | #ifdef CONFIG_QUOTA | |
525 | for (i = 0; i < MAXQUOTAS; i++) | |
526 | kfree(sbi->s_qf_names[i]); | |
527 | #endif | |
528 | ||
529 | /* Debugging code just in case the in-memory inode orphan list | |
530 | * isn't empty. The on-disk one can be non-empty if we've | |
531 | * detected an error and taken the fs readonly, but the | |
532 | * in-memory list had better be clean by this point. */ | |
533 | if (!list_empty(&sbi->s_orphan)) | |
534 | dump_orphan_list(sb, sbi); | |
535 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
536 | ||
f98393a6 | 537 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
538 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
539 | /* | |
540 | * Invalidate the journal device's buffers. We don't want them | |
541 | * floating about in memory - the physical journal device may | |
542 | * hotswapped, and it breaks the `ro-after' testing code. | |
543 | */ | |
544 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 545 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 546 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
547 | } |
548 | sb->s_fs_info = NULL; | |
549 | kfree(sbi); | |
550 | return; | |
551 | } | |
552 | ||
e18b890b | 553 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
554 | |
555 | /* | |
556 | * Called inside transaction, so use GFP_NOFS | |
557 | */ | |
617ba13b | 558 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 559 | { |
617ba13b | 560 | struct ext4_inode_info *ei; |
ac27a0ec | 561 | |
e6b4f8da | 562 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
563 | if (!ei) |
564 | return NULL; | |
617ba13b MC |
565 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL |
566 | ei->i_acl = EXT4_ACL_NOT_CACHED; | |
567 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
568 | #endif |
569 | ei->i_block_alloc_info = NULL; | |
570 | ei->vfs_inode.i_version = 1; | |
a86c6181 | 571 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
572 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
573 | spin_lock_init(&ei->i_prealloc_lock); | |
ac27a0ec DK |
574 | return &ei->vfs_inode; |
575 | } | |
576 | ||
617ba13b | 577 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 578 | { |
9f7dd93d VA |
579 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
580 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
581 | EXT4_I(inode)); | |
582 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
583 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
584 | true); | |
585 | dump_stack(); | |
586 | } | |
617ba13b | 587 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
588 | } |
589 | ||
4ba9b9d0 | 590 | static void init_once(struct kmem_cache *cachep, void *foo) |
ac27a0ec | 591 | { |
617ba13b | 592 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 593 | |
a35afb83 | 594 | INIT_LIST_HEAD(&ei->i_orphan); |
617ba13b | 595 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
a35afb83 | 596 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 597 | #endif |
0e855ac8 | 598 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 599 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
600 | } |
601 | ||
602 | static int init_inodecache(void) | |
603 | { | |
617ba13b MC |
604 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
605 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
606 | 0, (SLAB_RECLAIM_ACCOUNT| |
607 | SLAB_MEM_SPREAD), | |
20c2df83 | 608 | init_once); |
617ba13b | 609 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
610 | return -ENOMEM; |
611 | return 0; | |
612 | } | |
613 | ||
614 | static void destroy_inodecache(void) | |
615 | { | |
617ba13b | 616 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
617 | } |
618 | ||
617ba13b | 619 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 620 | { |
617ba13b MC |
621 | struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; |
622 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL | |
623 | if (EXT4_I(inode)->i_acl && | |
624 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
625 | posix_acl_release(EXT4_I(inode)->i_acl); | |
626 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
627 | } | |
628 | if (EXT4_I(inode)->i_default_acl && | |
629 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
630 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
631 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
632 | } |
633 | #endif | |
617ba13b MC |
634 | ext4_discard_reservation(inode); |
635 | EXT4_I(inode)->i_block_alloc_info = NULL; | |
ac27a0ec DK |
636 | if (unlikely(rsv)) |
637 | kfree(rsv); | |
638 | } | |
639 | ||
617ba13b | 640 | static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) |
ac27a0ec DK |
641 | { |
642 | #if defined(CONFIG_QUOTA) | |
617ba13b | 643 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
644 | |
645 | if (sbi->s_jquota_fmt) | |
646 | seq_printf(seq, ",jqfmt=%s", | |
647 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); | |
648 | ||
649 | if (sbi->s_qf_names[USRQUOTA]) | |
650 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
651 | ||
652 | if (sbi->s_qf_names[GRPQUOTA]) | |
653 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
654 | ||
617ba13b | 655 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
656 | seq_puts(seq, ",usrquota"); |
657 | ||
617ba13b | 658 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
659 | seq_puts(seq, ",grpquota"); |
660 | #endif | |
661 | } | |
662 | ||
d9c9bef1 MS |
663 | /* |
664 | * Show an option if | |
665 | * - it's set to a non-default value OR | |
666 | * - if the per-sb default is different from the global default | |
667 | */ | |
617ba13b | 668 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 669 | { |
aa22df2c AK |
670 | int def_errors; |
671 | unsigned long def_mount_opts; | |
ac27a0ec | 672 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
673 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
674 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
675 | |
676 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 677 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
678 | |
679 | if (sbi->s_sb_block != 1) | |
680 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
681 | if (test_opt(sb, MINIX_DF)) | |
682 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 683 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
684 | seq_puts(seq, ",grpid"); |
685 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
686 | seq_puts(seq, ",nogrpid"); | |
687 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
688 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
689 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
690 | } | |
691 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
692 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
693 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
694 | } | |
bb4f397a | 695 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 696 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
697 | def_errors == EXT4_ERRORS_CONTINUE) { |
698 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
699 | } |
700 | } | |
aa22df2c | 701 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 702 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 703 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 704 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 705 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 706 | seq_puts(seq, ",nouid32"); |
aa22df2c | 707 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
708 | seq_puts(seq, ",debug"); |
709 | if (test_opt(sb, OLDALLOC)) | |
710 | seq_puts(seq, ",oldalloc"); | |
07620f69 | 711 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
aa22df2c AK |
712 | if (test_opt(sb, XATTR_USER) && |
713 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
714 | seq_puts(seq, ",user_xattr"); |
715 | if (!test_opt(sb, XATTR_USER) && | |
716 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
717 | seq_puts(seq, ",nouser_xattr"); | |
718 | } | |
719 | #endif | |
07620f69 | 720 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL |
aa22df2c | 721 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
722 | seq_puts(seq, ",acl"); |
723 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
724 | seq_puts(seq, ",noacl"); | |
725 | #endif | |
726 | if (!test_opt(sb, RESERVATION)) | |
727 | seq_puts(seq, ",noreservation"); | |
728 | if (sbi->s_commit_interval) { | |
729 | seq_printf(seq, ",commit=%u", | |
730 | (unsigned) (sbi->s_commit_interval / HZ)); | |
731 | } | |
732 | if (test_opt(sb, BARRIER)) | |
733 | seq_puts(seq, ",barrier=1"); | |
734 | if (test_opt(sb, NOBH)) | |
735 | seq_puts(seq, ",nobh"); | |
736 | if (!test_opt(sb, EXTENTS)) | |
737 | seq_puts(seq, ",noextents"); | |
3dbd0ede AK |
738 | if (!test_opt(sb, MBALLOC)) |
739 | seq_puts(seq, ",nomballoc"); | |
25ec56b5 JNC |
740 | if (test_opt(sb, I_VERSION)) |
741 | seq_puts(seq, ",i_version"); | |
ac27a0ec | 742 | |
cb45bbe4 MS |
743 | if (sbi->s_stripe) |
744 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
745 | /* |
746 | * journal mode get enabled in different ways | |
747 | * So just print the value even if we didn't specify it | |
748 | */ | |
617ba13b | 749 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 750 | seq_puts(seq, ",data=journal"); |
617ba13b | 751 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 752 | seq_puts(seq, ",data=ordered"); |
617ba13b | 753 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
754 | seq_puts(seq, ",data=writeback"); |
755 | ||
617ba13b | 756 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
757 | return 0; |
758 | } | |
759 | ||
760 | ||
1b961ac0 CH |
761 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
762 | u64 ino, u32 generation) | |
ac27a0ec | 763 | { |
ac27a0ec | 764 | struct inode *inode; |
ac27a0ec | 765 | |
617ba13b | 766 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 767 | return ERR_PTR(-ESTALE); |
617ba13b | 768 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
769 | return ERR_PTR(-ESTALE); |
770 | ||
771 | /* iget isn't really right if the inode is currently unallocated!! | |
772 | * | |
617ba13b | 773 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
774 | * deleted, so we should be safe. |
775 | * | |
776 | * Currently we don't know the generation for parent directory, so | |
777 | * a generation of 0 means "accept any" | |
778 | */ | |
1d1fe1ee DH |
779 | inode = ext4_iget(sb, ino); |
780 | if (IS_ERR(inode)) | |
781 | return ERR_CAST(inode); | |
782 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
783 | iput(inode); |
784 | return ERR_PTR(-ESTALE); | |
785 | } | |
1b961ac0 CH |
786 | |
787 | return inode; | |
788 | } | |
789 | ||
790 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
791 | int fh_len, int fh_type) | |
792 | { | |
793 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
794 | ext4_nfs_get_inode); | |
795 | } | |
796 | ||
797 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
798 | int fh_len, int fh_type) | |
799 | { | |
800 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
801 | ext4_nfs_get_inode); | |
ac27a0ec DK |
802 | } |
803 | ||
804 | #ifdef CONFIG_QUOTA | |
805 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
806 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
807 | ||
617ba13b MC |
808 | static int ext4_dquot_initialize(struct inode *inode, int type); |
809 | static int ext4_dquot_drop(struct inode *inode); | |
810 | static int ext4_write_dquot(struct dquot *dquot); | |
811 | static int ext4_acquire_dquot(struct dquot *dquot); | |
812 | static int ext4_release_dquot(struct dquot *dquot); | |
813 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
814 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
815 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
816 | char *path, int remount); | |
617ba13b MC |
817 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
818 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 819 | size_t len, loff_t off); |
617ba13b | 820 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
821 | const char *data, size_t len, loff_t off); |
822 | ||
617ba13b MC |
823 | static struct dquot_operations ext4_quota_operations = { |
824 | .initialize = ext4_dquot_initialize, | |
825 | .drop = ext4_dquot_drop, | |
ac27a0ec DK |
826 | .alloc_space = dquot_alloc_space, |
827 | .alloc_inode = dquot_alloc_inode, | |
828 | .free_space = dquot_free_space, | |
829 | .free_inode = dquot_free_inode, | |
830 | .transfer = dquot_transfer, | |
617ba13b MC |
831 | .write_dquot = ext4_write_dquot, |
832 | .acquire_dquot = ext4_acquire_dquot, | |
833 | .release_dquot = ext4_release_dquot, | |
834 | .mark_dirty = ext4_mark_dquot_dirty, | |
835 | .write_info = ext4_write_info | |
ac27a0ec DK |
836 | }; |
837 | ||
617ba13b MC |
838 | static struct quotactl_ops ext4_qctl_operations = { |
839 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
840 | .quota_off = vfs_quota_off, |
841 | .quota_sync = vfs_quota_sync, | |
842 | .get_info = vfs_get_dqinfo, | |
843 | .set_info = vfs_set_dqinfo, | |
844 | .get_dqblk = vfs_get_dqblk, | |
845 | .set_dqblk = vfs_set_dqblk | |
846 | }; | |
847 | #endif | |
848 | ||
ee9b6d61 | 849 | static const struct super_operations ext4_sops = { |
617ba13b MC |
850 | .alloc_inode = ext4_alloc_inode, |
851 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
852 | .write_inode = ext4_write_inode, |
853 | .dirty_inode = ext4_dirty_inode, | |
854 | .delete_inode = ext4_delete_inode, | |
855 | .put_super = ext4_put_super, | |
856 | .write_super = ext4_write_super, | |
857 | .sync_fs = ext4_sync_fs, | |
858 | .write_super_lockfs = ext4_write_super_lockfs, | |
859 | .unlockfs = ext4_unlockfs, | |
860 | .statfs = ext4_statfs, | |
861 | .remount_fs = ext4_remount, | |
862 | .clear_inode = ext4_clear_inode, | |
863 | .show_options = ext4_show_options, | |
ac27a0ec | 864 | #ifdef CONFIG_QUOTA |
617ba13b MC |
865 | .quota_read = ext4_quota_read, |
866 | .quota_write = ext4_quota_write, | |
ac27a0ec DK |
867 | #endif |
868 | }; | |
869 | ||
39655164 | 870 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
871 | .fh_to_dentry = ext4_fh_to_dentry, |
872 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 873 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
874 | }; |
875 | ||
876 | enum { | |
877 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
878 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
879 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, | |
880 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, | |
881 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, | |
882 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, | |
818d276c | 883 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec DK |
884 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
885 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, | |
886 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
887 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, | |
25ec56b5 | 888 | Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, |
c9de560d | 889 | Opt_mballoc, Opt_nomballoc, Opt_stripe, |
ac27a0ec DK |
890 | }; |
891 | ||
892 | static match_table_t tokens = { | |
893 | {Opt_bsd_df, "bsddf"}, | |
894 | {Opt_minix_df, "minixdf"}, | |
895 | {Opt_grpid, "grpid"}, | |
896 | {Opt_grpid, "bsdgroups"}, | |
897 | {Opt_nogrpid, "nogrpid"}, | |
898 | {Opt_nogrpid, "sysvgroups"}, | |
899 | {Opt_resgid, "resgid=%u"}, | |
900 | {Opt_resuid, "resuid=%u"}, | |
901 | {Opt_sb, "sb=%u"}, | |
902 | {Opt_err_cont, "errors=continue"}, | |
903 | {Opt_err_panic, "errors=panic"}, | |
904 | {Opt_err_ro, "errors=remount-ro"}, | |
905 | {Opt_nouid32, "nouid32"}, | |
906 | {Opt_nocheck, "nocheck"}, | |
907 | {Opt_nocheck, "check=none"}, | |
908 | {Opt_debug, "debug"}, | |
909 | {Opt_oldalloc, "oldalloc"}, | |
910 | {Opt_orlov, "orlov"}, | |
911 | {Opt_user_xattr, "user_xattr"}, | |
912 | {Opt_nouser_xattr, "nouser_xattr"}, | |
913 | {Opt_acl, "acl"}, | |
914 | {Opt_noacl, "noacl"}, | |
915 | {Opt_reservation, "reservation"}, | |
916 | {Opt_noreservation, "noreservation"}, | |
917 | {Opt_noload, "noload"}, | |
918 | {Opt_nobh, "nobh"}, | |
919 | {Opt_bh, "bh"}, | |
920 | {Opt_commit, "commit=%u"}, | |
921 | {Opt_journal_update, "journal=update"}, | |
922 | {Opt_journal_inum, "journal=%u"}, | |
923 | {Opt_journal_dev, "journal_dev=%u"}, | |
818d276c GS |
924 | {Opt_journal_checksum, "journal_checksum"}, |
925 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
926 | {Opt_abort, "abort"}, |
927 | {Opt_data_journal, "data=journal"}, | |
928 | {Opt_data_ordered, "data=ordered"}, | |
929 | {Opt_data_writeback, "data=writeback"}, | |
930 | {Opt_offusrjquota, "usrjquota="}, | |
931 | {Opt_usrjquota, "usrjquota=%s"}, | |
932 | {Opt_offgrpjquota, "grpjquota="}, | |
933 | {Opt_grpjquota, "grpjquota=%s"}, | |
934 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
935 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
936 | {Opt_grpquota, "grpquota"}, | |
937 | {Opt_noquota, "noquota"}, | |
938 | {Opt_quota, "quota"}, | |
939 | {Opt_usrquota, "usrquota"}, | |
940 | {Opt_barrier, "barrier=%u"}, | |
a86c6181 | 941 | {Opt_extents, "extents"}, |
1e2462f9 | 942 | {Opt_noextents, "noextents"}, |
25ec56b5 | 943 | {Opt_i_version, "i_version"}, |
c9de560d AT |
944 | {Opt_mballoc, "mballoc"}, |
945 | {Opt_nomballoc, "nomballoc"}, | |
946 | {Opt_stripe, "stripe=%u"}, | |
ac27a0ec | 947 | {Opt_resize, "resize"}, |
f3f12faa | 948 | {Opt_err, NULL}, |
ac27a0ec DK |
949 | }; |
950 | ||
617ba13b | 951 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 952 | { |
617ba13b | 953 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
954 | char *options = (char *) *data; |
955 | ||
956 | if (!options || strncmp(options, "sb=", 3) != 0) | |
957 | return 1; /* Default location */ | |
958 | options += 3; | |
617ba13b | 959 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
960 | sb_block = simple_strtoul(options, &options, 0); |
961 | if (*options && *options != ',') { | |
617ba13b | 962 | printk("EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
963 | (char *) *data); |
964 | return 1; | |
965 | } | |
966 | if (*options == ',') | |
967 | options++; | |
968 | *data = (void *) options; | |
969 | return sb_block; | |
970 | } | |
971 | ||
972 | static int parse_options (char *options, struct super_block *sb, | |
973 | unsigned int *inum, unsigned long *journal_devnum, | |
617ba13b | 974 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 975 | { |
617ba13b | 976 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
977 | char * p; |
978 | substring_t args[MAX_OPT_ARGS]; | |
979 | int data_opt = 0; | |
980 | int option; | |
981 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 982 | int qtype, qfmt; |
ac27a0ec DK |
983 | char *qname; |
984 | #endif | |
985 | ||
986 | if (!options) | |
987 | return 1; | |
988 | ||
989 | while ((p = strsep (&options, ",")) != NULL) { | |
990 | int token; | |
991 | if (!*p) | |
992 | continue; | |
993 | ||
994 | token = match_token(p, tokens, args); | |
995 | switch (token) { | |
996 | case Opt_bsd_df: | |
997 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
998 | break; | |
999 | case Opt_minix_df: | |
1000 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
1001 | break; | |
1002 | case Opt_grpid: | |
1003 | set_opt (sbi->s_mount_opt, GRPID); | |
1004 | break; | |
1005 | case Opt_nogrpid: | |
1006 | clear_opt (sbi->s_mount_opt, GRPID); | |
1007 | break; | |
1008 | case Opt_resuid: | |
1009 | if (match_int(&args[0], &option)) | |
1010 | return 0; | |
1011 | sbi->s_resuid = option; | |
1012 | break; | |
1013 | case Opt_resgid: | |
1014 | if (match_int(&args[0], &option)) | |
1015 | return 0; | |
1016 | sbi->s_resgid = option; | |
1017 | break; | |
1018 | case Opt_sb: | |
1019 | /* handled by get_sb_block() instead of here */ | |
1020 | /* *sb_block = match_int(&args[0]); */ | |
1021 | break; | |
1022 | case Opt_err_panic: | |
1023 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1024 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1025 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1026 | break; | |
1027 | case Opt_err_ro: | |
1028 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1029 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1030 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
1031 | break; | |
1032 | case Opt_err_cont: | |
1033 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
1034 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
1035 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
1036 | break; | |
1037 | case Opt_nouid32: | |
1038 | set_opt (sbi->s_mount_opt, NO_UID32); | |
1039 | break; | |
1040 | case Opt_nocheck: | |
1041 | clear_opt (sbi->s_mount_opt, CHECK); | |
1042 | break; | |
1043 | case Opt_debug: | |
1044 | set_opt (sbi->s_mount_opt, DEBUG); | |
1045 | break; | |
1046 | case Opt_oldalloc: | |
1047 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
1048 | break; | |
1049 | case Opt_orlov: | |
1050 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
1051 | break; | |
617ba13b | 1052 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
ac27a0ec DK |
1053 | case Opt_user_xattr: |
1054 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
1055 | break; | |
1056 | case Opt_nouser_xattr: | |
1057 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
1058 | break; | |
1059 | #else | |
1060 | case Opt_user_xattr: | |
1061 | case Opt_nouser_xattr: | |
617ba13b | 1062 | printk("EXT4 (no)user_xattr options not supported\n"); |
ac27a0ec DK |
1063 | break; |
1064 | #endif | |
617ba13b | 1065 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL |
ac27a0ec DK |
1066 | case Opt_acl: |
1067 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1068 | break; | |
1069 | case Opt_noacl: | |
1070 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1071 | break; | |
1072 | #else | |
1073 | case Opt_acl: | |
1074 | case Opt_noacl: | |
617ba13b | 1075 | printk("EXT4 (no)acl options not supported\n"); |
ac27a0ec DK |
1076 | break; |
1077 | #endif | |
1078 | case Opt_reservation: | |
1079 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1080 | break; | |
1081 | case Opt_noreservation: | |
1082 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1083 | break; | |
1084 | case Opt_journal_update: | |
1085 | /* @@@ FIXME */ | |
1086 | /* Eventually we will want to be able to create | |
1087 | a journal file here. For now, only allow the | |
1088 | user to specify an existing inode to be the | |
1089 | journal file. */ | |
1090 | if (is_remount) { | |
617ba13b | 1091 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1092 | "journal on remount\n"); |
1093 | return 0; | |
1094 | } | |
1095 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
1096 | break; | |
1097 | case Opt_journal_inum: | |
1098 | if (is_remount) { | |
617ba13b | 1099 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1100 | "journal on remount\n"); |
1101 | return 0; | |
1102 | } | |
1103 | if (match_int(&args[0], &option)) | |
1104 | return 0; | |
1105 | *inum = option; | |
1106 | break; | |
1107 | case Opt_journal_dev: | |
1108 | if (is_remount) { | |
617ba13b | 1109 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1110 | "journal on remount\n"); |
1111 | return 0; | |
1112 | } | |
1113 | if (match_int(&args[0], &option)) | |
1114 | return 0; | |
1115 | *journal_devnum = option; | |
1116 | break; | |
818d276c GS |
1117 | case Opt_journal_checksum: |
1118 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1119 | break; | |
1120 | case Opt_journal_async_commit: | |
1121 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1122 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1123 | break; | |
ac27a0ec DK |
1124 | case Opt_noload: |
1125 | set_opt (sbi->s_mount_opt, NOLOAD); | |
1126 | break; | |
1127 | case Opt_commit: | |
1128 | if (match_int(&args[0], &option)) | |
1129 | return 0; | |
1130 | if (option < 0) | |
1131 | return 0; | |
1132 | if (option == 0) | |
cd02ff0b | 1133 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1134 | sbi->s_commit_interval = HZ * option; |
1135 | break; | |
1136 | case Opt_data_journal: | |
617ba13b | 1137 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1138 | goto datacheck; |
1139 | case Opt_data_ordered: | |
617ba13b | 1140 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1141 | goto datacheck; |
1142 | case Opt_data_writeback: | |
617ba13b | 1143 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1144 | datacheck: |
1145 | if (is_remount) { | |
617ba13b | 1146 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1147 | != data_opt) { |
1148 | printk(KERN_ERR | |
617ba13b | 1149 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1150 | "mode on remount\n"); |
1151 | return 0; | |
1152 | } | |
1153 | } else { | |
617ba13b | 1154 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1155 | sbi->s_mount_opt |= data_opt; |
1156 | } | |
1157 | break; | |
1158 | #ifdef CONFIG_QUOTA | |
1159 | case Opt_usrjquota: | |
1160 | qtype = USRQUOTA; | |
1161 | goto set_qf_name; | |
1162 | case Opt_grpjquota: | |
1163 | qtype = GRPQUOTA; | |
1164 | set_qf_name: | |
dfc5d03f JK |
1165 | if ((sb_any_quota_enabled(sb) || |
1166 | sb_any_quota_suspended(sb)) && | |
1167 | !sbi->s_qf_names[qtype]) { | |
ac27a0ec | 1168 | printk(KERN_ERR |
617ba13b | 1169 | "EXT4-fs: Cannot change journalled " |
ac27a0ec DK |
1170 | "quota options when quota turned on.\n"); |
1171 | return 0; | |
1172 | } | |
1173 | qname = match_strdup(&args[0]); | |
1174 | if (!qname) { | |
1175 | printk(KERN_ERR | |
617ba13b | 1176 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1177 | "storing quotafile name.\n"); |
1178 | return 0; | |
1179 | } | |
1180 | if (sbi->s_qf_names[qtype] && | |
1181 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1182 | printk(KERN_ERR | |
617ba13b | 1183 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1184 | "specified.\n", QTYPE2NAME(qtype)); |
1185 | kfree(qname); | |
1186 | return 0; | |
1187 | } | |
1188 | sbi->s_qf_names[qtype] = qname; | |
1189 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1190 | printk(KERN_ERR | |
617ba13b | 1191 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1192 | "filesystem root.\n"); |
1193 | kfree(sbi->s_qf_names[qtype]); | |
1194 | sbi->s_qf_names[qtype] = NULL; | |
1195 | return 0; | |
1196 | } | |
1197 | set_opt(sbi->s_mount_opt, QUOTA); | |
1198 | break; | |
1199 | case Opt_offusrjquota: | |
1200 | qtype = USRQUOTA; | |
1201 | goto clear_qf_name; | |
1202 | case Opt_offgrpjquota: | |
1203 | qtype = GRPQUOTA; | |
1204 | clear_qf_name: | |
dfc5d03f JK |
1205 | if ((sb_any_quota_enabled(sb) || |
1206 | sb_any_quota_suspended(sb)) && | |
1207 | sbi->s_qf_names[qtype]) { | |
617ba13b | 1208 | printk(KERN_ERR "EXT4-fs: Cannot change " |
ac27a0ec DK |
1209 | "journalled quota options when " |
1210 | "quota turned on.\n"); | |
1211 | return 0; | |
1212 | } | |
1213 | /* | |
1214 | * The space will be released later when all options | |
1215 | * are confirmed to be correct | |
1216 | */ | |
1217 | sbi->s_qf_names[qtype] = NULL; | |
1218 | break; | |
1219 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1220 | qfmt = QFMT_VFS_OLD; |
1221 | goto set_qf_format; | |
ac27a0ec | 1222 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1223 | qfmt = QFMT_VFS_V0; |
1224 | set_qf_format: | |
1225 | if ((sb_any_quota_enabled(sb) || | |
1226 | sb_any_quota_suspended(sb)) && | |
1227 | sbi->s_jquota_fmt != qfmt) { | |
1228 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1229 | "journaled quota options when " | |
1230 | "quota turned on.\n"); | |
1231 | return 0; | |
1232 | } | |
1233 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1234 | break; |
1235 | case Opt_quota: | |
1236 | case Opt_usrquota: | |
1237 | set_opt(sbi->s_mount_opt, QUOTA); | |
1238 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1239 | break; | |
1240 | case Opt_grpquota: | |
1241 | set_opt(sbi->s_mount_opt, QUOTA); | |
1242 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1243 | break; | |
1244 | case Opt_noquota: | |
1245 | if (sb_any_quota_enabled(sb)) { | |
617ba13b | 1246 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1247 | "options when quota turned on.\n"); |
1248 | return 0; | |
1249 | } | |
1250 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1251 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1252 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1253 | break; | |
1254 | #else | |
1255 | case Opt_quota: | |
1256 | case Opt_usrquota: | |
1257 | case Opt_grpquota: | |
cd59e7b9 JK |
1258 | printk(KERN_ERR |
1259 | "EXT4-fs: quota options not supported.\n"); | |
1260 | break; | |
ac27a0ec DK |
1261 | case Opt_usrjquota: |
1262 | case Opt_grpjquota: | |
1263 | case Opt_offusrjquota: | |
1264 | case Opt_offgrpjquota: | |
1265 | case Opt_jqfmt_vfsold: | |
1266 | case Opt_jqfmt_vfsv0: | |
1267 | printk(KERN_ERR | |
cd59e7b9 | 1268 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1269 | "supported.\n"); |
1270 | break; | |
1271 | case Opt_noquota: | |
1272 | break; | |
1273 | #endif | |
1274 | case Opt_abort: | |
1275 | set_opt(sbi->s_mount_opt, ABORT); | |
1276 | break; | |
1277 | case Opt_barrier: | |
1278 | if (match_int(&args[0], &option)) | |
1279 | return 0; | |
1280 | if (option) | |
1281 | set_opt(sbi->s_mount_opt, BARRIER); | |
1282 | else | |
1283 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1284 | break; | |
1285 | case Opt_ignore: | |
1286 | break; | |
1287 | case Opt_resize: | |
1288 | if (!is_remount) { | |
617ba13b | 1289 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1290 | "for remount\n"); |
1291 | return 0; | |
1292 | } | |
1293 | if (match_int(&args[0], &option) != 0) | |
1294 | return 0; | |
1295 | *n_blocks_count = option; | |
1296 | break; | |
1297 | case Opt_nobh: | |
1298 | set_opt(sbi->s_mount_opt, NOBH); | |
1299 | break; | |
1300 | case Opt_bh: | |
1301 | clear_opt(sbi->s_mount_opt, NOBH); | |
1302 | break; | |
a86c6181 AT |
1303 | case Opt_extents: |
1304 | set_opt (sbi->s_mount_opt, EXTENTS); | |
1305 | break; | |
1e2462f9 MC |
1306 | case Opt_noextents: |
1307 | clear_opt (sbi->s_mount_opt, EXTENTS); | |
1308 | break; | |
25ec56b5 JNC |
1309 | case Opt_i_version: |
1310 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1311 | sb->s_flags |= MS_I_VERSION; | |
1312 | break; | |
c9de560d AT |
1313 | case Opt_mballoc: |
1314 | set_opt(sbi->s_mount_opt, MBALLOC); | |
1315 | break; | |
1316 | case Opt_nomballoc: | |
1317 | clear_opt(sbi->s_mount_opt, MBALLOC); | |
1318 | break; | |
1319 | case Opt_stripe: | |
1320 | if (match_int(&args[0], &option)) | |
1321 | return 0; | |
1322 | if (option < 0) | |
1323 | return 0; | |
1324 | sbi->s_stripe = option; | |
1325 | break; | |
ac27a0ec DK |
1326 | default: |
1327 | printk (KERN_ERR | |
617ba13b | 1328 | "EXT4-fs: Unrecognized mount option \"%s\" " |
ac27a0ec DK |
1329 | "or missing value\n", p); |
1330 | return 0; | |
1331 | } | |
1332 | } | |
1333 | #ifdef CONFIG_QUOTA | |
1334 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1335 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1336 | sbi->s_qf_names[USRQUOTA]) |
1337 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1338 | ||
617ba13b | 1339 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1340 | sbi->s_qf_names[GRPQUOTA]) |
1341 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1342 | ||
1343 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1344 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1345 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1346 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1347 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1348 | "format mixing.\n"); |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | if (!sbi->s_jquota_fmt) { | |
617ba13b | 1353 | printk(KERN_ERR "EXT4-fs: journalled quota format " |
ac27a0ec DK |
1354 | "not specified.\n"); |
1355 | return 0; | |
1356 | } | |
1357 | } else { | |
1358 | if (sbi->s_jquota_fmt) { | |
617ba13b | 1359 | printk(KERN_ERR "EXT4-fs: journalled quota format " |
ac27a0ec DK |
1360 | "specified with no journalling " |
1361 | "enabled.\n"); | |
1362 | return 0; | |
1363 | } | |
1364 | } | |
1365 | #endif | |
1366 | return 1; | |
1367 | } | |
1368 | ||
617ba13b | 1369 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1370 | int read_only) |
1371 | { | |
617ba13b | 1372 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1373 | int res = 0; |
1374 | ||
617ba13b MC |
1375 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
1376 | printk (KERN_ERR "EXT4-fs warning: revision level too high, " | |
ac27a0ec DK |
1377 | "forcing read-only mode\n"); |
1378 | res = MS_RDONLY; | |
1379 | } | |
1380 | if (read_only) | |
1381 | return res; | |
617ba13b MC |
1382 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
1383 | printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " | |
ac27a0ec | 1384 | "running e2fsck is recommended\n"); |
617ba13b | 1385 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
ac27a0ec | 1386 | printk (KERN_WARNING |
617ba13b | 1387 | "EXT4-fs warning: mounting fs with errors, " |
ac27a0ec DK |
1388 | "running e2fsck is recommended\n"); |
1389 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && | |
1390 | le16_to_cpu(es->s_mnt_count) >= | |
1391 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1392 | printk (KERN_WARNING | |
617ba13b | 1393 | "EXT4-fs warning: maximal mount count reached, " |
ac27a0ec DK |
1394 | "running e2fsck is recommended\n"); |
1395 | else if (le32_to_cpu(es->s_checkinterval) && | |
1396 | (le32_to_cpu(es->s_lastcheck) + | |
1397 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
1398 | printk (KERN_WARNING | |
617ba13b | 1399 | "EXT4-fs warning: checktime reached, " |
ac27a0ec DK |
1400 | "running e2fsck is recommended\n"); |
1401 | #if 0 | |
1402 | /* @@@ We _will_ want to clear the valid bit if we find | |
63f57933 AM |
1403 | * inconsistencies, to force a fsck at reboot. But for |
1404 | * a plain journaled filesystem we can keep it set as | |
1405 | * valid forever! :) | |
1406 | */ | |
216c34b2 | 1407 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec DK |
1408 | #endif |
1409 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
617ba13b | 1410 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1411 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1412 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b MC |
1413 | ext4_update_dynamic_rev(sb); |
1414 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1415 | |
617ba13b | 1416 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1417 | if (test_opt(sb, DEBUG)) |
617ba13b | 1418 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " |
ac27a0ec DK |
1419 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1420 | sb->s_blocksize, | |
1421 | sbi->s_groups_count, | |
617ba13b MC |
1422 | EXT4_BLOCKS_PER_GROUP(sb), |
1423 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1424 | sbi->s_mount_opt); |
1425 | ||
617ba13b MC |
1426 | printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); |
1427 | if (EXT4_SB(sb)->s_journal->j_inode == NULL) { | |
ac27a0ec DK |
1428 | char b[BDEVNAME_SIZE]; |
1429 | ||
1430 | printk("external journal on %s\n", | |
617ba13b | 1431 | bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); |
ac27a0ec DK |
1432 | } else { |
1433 | printk("internal journal\n"); | |
1434 | } | |
1435 | return res; | |
1436 | } | |
1437 | ||
717d50e4 AD |
1438 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1439 | struct ext4_group_desc *gdp) | |
1440 | { | |
1441 | __u16 crc = 0; | |
1442 | ||
1443 | if (sbi->s_es->s_feature_ro_compat & | |
1444 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1445 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1446 | __le32 le_group = cpu_to_le32(block_group); | |
1447 | ||
1448 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1449 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1450 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1451 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1452 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1453 | if ((sbi->s_es->s_feature_incompat & | |
1454 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1455 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1456 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1457 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1458 | offset); | |
1459 | } | |
1460 | ||
1461 | return cpu_to_le16(crc); | |
1462 | } | |
1463 | ||
1464 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1465 | struct ext4_group_desc *gdp) | |
1466 | { | |
1467 | if ((sbi->s_es->s_feature_ro_compat & | |
1468 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1469 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1470 | return 0; | |
1471 | ||
1472 | return 1; | |
1473 | } | |
1474 | ||
ac27a0ec | 1475 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1476 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1477 | { |
617ba13b MC |
1478 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1479 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1480 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1481 | ext4_fsblk_t block_bitmap; |
1482 | ext4_fsblk_t inode_bitmap; | |
1483 | ext4_fsblk_t inode_table; | |
ce421581 | 1484 | int flexbg_flag = 0; |
fd2d4291 | 1485 | ext4_group_t i; |
ac27a0ec | 1486 | |
ce421581 JS |
1487 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1488 | flexbg_flag = 1; | |
1489 | ||
617ba13b | 1490 | ext4_debug ("Checking group descriptors"); |
ac27a0ec | 1491 | |
197cd65a AM |
1492 | for (i = 0; i < sbi->s_groups_count; i++) { |
1493 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1494 | ||
ce421581 | 1495 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1496 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1497 | else |
1498 | last_block = first_block + | |
617ba13b | 1499 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1500 | |
8fadc143 | 1501 | block_bitmap = ext4_block_bitmap(sb, gdp); |
bd81d8ee | 1502 | if (block_bitmap < first_block || block_bitmap > last_block) |
ac27a0ec | 1503 | { |
c19204b0 JB |
1504 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1505 | "Block bitmap for group %lu not in group " | |
1506 | "(block %llu)!", i, block_bitmap); | |
ac27a0ec DK |
1507 | return 0; |
1508 | } | |
8fadc143 | 1509 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
bd81d8ee | 1510 | if (inode_bitmap < first_block || inode_bitmap > last_block) |
ac27a0ec | 1511 | { |
c19204b0 JB |
1512 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1513 | "Inode bitmap for group %lu not in group " | |
1514 | "(block %llu)!", i, inode_bitmap); | |
ac27a0ec DK |
1515 | return 0; |
1516 | } | |
8fadc143 | 1517 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1518 | if (inode_table < first_block || |
780dcdb2 | 1519 | inode_table + sbi->s_itb_per_group - 1 > last_block) |
ac27a0ec | 1520 | { |
c19204b0 JB |
1521 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1522 | "Inode table for group %lu not in group " | |
1523 | "(block %llu)!", i, inode_table); | |
ac27a0ec DK |
1524 | return 0; |
1525 | } | |
717d50e4 | 1526 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 JB |
1527 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1528 | "Checksum for group %lu failed (%u!=%u)\n", | |
1529 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
1530 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
717d50e4 AD |
1531 | return 0; |
1532 | } | |
ce421581 JS |
1533 | if (!flexbg_flag) |
1534 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1535 | } |
1536 | ||
bd81d8ee | 1537 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
617ba13b | 1538 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1539 | return 1; |
1540 | } | |
1541 | ||
617ba13b | 1542 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1543 | * the superblock) which were deleted from all directories, but held open by |
1544 | * a process at the time of a crash. We walk the list and try to delete these | |
1545 | * inodes at recovery time (only with a read-write filesystem). | |
1546 | * | |
1547 | * In order to keep the orphan inode chain consistent during traversal (in | |
1548 | * case of crash during recovery), we link each inode into the superblock | |
1549 | * orphan list_head and handle it the same way as an inode deletion during | |
1550 | * normal operation (which journals the operations for us). | |
1551 | * | |
1552 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1553 | * accidentally point at an in-use or already deleted inode. The worst that | |
1554 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1555 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1556 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1557 | * inode cleanup for us, so we can safely abort without any further action. | |
1558 | */ | |
617ba13b MC |
1559 | static void ext4_orphan_cleanup (struct super_block * sb, |
1560 | struct ext4_super_block * es) | |
ac27a0ec DK |
1561 | { |
1562 | unsigned int s_flags = sb->s_flags; | |
1563 | int nr_orphans = 0, nr_truncates = 0; | |
1564 | #ifdef CONFIG_QUOTA | |
1565 | int i; | |
1566 | #endif | |
1567 | if (!es->s_last_orphan) { | |
1568 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1569 | return; | |
1570 | } | |
1571 | ||
a8f48a95 ES |
1572 | if (bdev_read_only(sb->s_bdev)) { |
1573 | printk(KERN_ERR "EXT4-fs: write access " | |
1574 | "unavailable, skipping orphan cleanup.\n"); | |
1575 | return; | |
1576 | } | |
1577 | ||
617ba13b | 1578 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1579 | if (es->s_last_orphan) |
1580 | jbd_debug(1, "Errors on filesystem, " | |
1581 | "clearing orphan list.\n"); | |
1582 | es->s_last_orphan = 0; | |
1583 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1584 | return; | |
1585 | } | |
1586 | ||
1587 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1588 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1589 | sb->s_id); |
1590 | sb->s_flags &= ~MS_RDONLY; | |
1591 | } | |
1592 | #ifdef CONFIG_QUOTA | |
1593 | /* Needed for iput() to work correctly and not trash data */ | |
1594 | sb->s_flags |= MS_ACTIVE; | |
1595 | /* Turn on quotas so that they are updated correctly */ | |
1596 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1597 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1598 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1599 | if (ret < 0) |
1600 | printk(KERN_ERR | |
617ba13b | 1601 | "EXT4-fs: Cannot turn on journalled " |
ac27a0ec DK |
1602 | "quota: error %d\n", ret); |
1603 | } | |
1604 | } | |
1605 | #endif | |
1606 | ||
1607 | while (es->s_last_orphan) { | |
1608 | struct inode *inode; | |
1609 | ||
97bd42b9 JB |
1610 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1611 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1612 | es->s_last_orphan = 0; |
1613 | break; | |
1614 | } | |
1615 | ||
617ba13b | 1616 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
ac27a0ec DK |
1617 | DQUOT_INIT(inode); |
1618 | if (inode->i_nlink) { | |
1619 | printk(KERN_DEBUG | |
1620 | "%s: truncating inode %lu to %Ld bytes\n", | |
46e665e9 | 1621 | __func__, inode->i_ino, inode->i_size); |
ac27a0ec DK |
1622 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", |
1623 | inode->i_ino, inode->i_size); | |
617ba13b | 1624 | ext4_truncate(inode); |
ac27a0ec DK |
1625 | nr_truncates++; |
1626 | } else { | |
1627 | printk(KERN_DEBUG | |
1628 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1629 | __func__, inode->i_ino); |
ac27a0ec DK |
1630 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1631 | inode->i_ino); | |
1632 | nr_orphans++; | |
1633 | } | |
1634 | iput(inode); /* The delete magic happens here! */ | |
1635 | } | |
1636 | ||
1637 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1638 | ||
1639 | if (nr_orphans) | |
617ba13b | 1640 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1641 | sb->s_id, PLURAL(nr_orphans)); |
1642 | if (nr_truncates) | |
617ba13b | 1643 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1644 | sb->s_id, PLURAL(nr_truncates)); |
1645 | #ifdef CONFIG_QUOTA | |
1646 | /* Turn quotas off */ | |
1647 | for (i = 0; i < MAXQUOTAS; i++) { | |
1648 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1649 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1650 | } |
1651 | #endif | |
1652 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1653 | } | |
cd2291a4 ES |
1654 | /* |
1655 | * Maximal extent format file size. | |
1656 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1657 | * extent format containers, within a sector_t, and within i_blocks | |
1658 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1659 | * so that won't be a limiting factor. | |
1660 | * | |
1661 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1662 | */ | |
1663 | static loff_t ext4_max_size(int blkbits) | |
1664 | { | |
1665 | loff_t res; | |
1666 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1667 | ||
1668 | /* small i_blocks in vfs inode? */ | |
1669 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
1670 | /* | |
1671 | * CONFIG_LSF is not enabled implies the inode | |
1672 | * i_block represent total blocks in 512 bytes | |
1673 | * 32 == size of vfs inode i_blocks * 8 | |
1674 | */ | |
1675 | upper_limit = (1LL << 32) - 1; | |
1676 | ||
1677 | /* total blocks in file system block size */ | |
1678 | upper_limit >>= (blkbits - 9); | |
1679 | upper_limit <<= blkbits; | |
1680 | } | |
1681 | ||
1682 | /* 32-bit extent-start container, ee_block */ | |
1683 | res = 1LL << 32; | |
1684 | res <<= blkbits; | |
1685 | res -= 1; | |
1686 | ||
1687 | /* Sanity check against vm- & vfs- imposed limits */ | |
1688 | if (res > upper_limit) | |
1689 | res = upper_limit; | |
1690 | ||
1691 | return res; | |
1692 | } | |
ac27a0ec | 1693 | |
ac27a0ec | 1694 | /* |
cd2291a4 | 1695 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1696 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1697 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1698 | */ |
cd2291a4 | 1699 | static loff_t ext4_max_bitmap_size(int bits) |
ac27a0ec | 1700 | { |
617ba13b | 1701 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1702 | int meta_blocks; |
1703 | loff_t upper_limit; | |
1704 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1705 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1706 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1707 | * does not exceed 2^48 -1 |
1708 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1709 | * total number of 512 bytes blocks of the file | |
1710 | */ | |
1711 | ||
1712 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
1713 | /* | |
1714 | * CONFIG_LSF is not enabled implies the inode | |
1715 | * i_block represent total blocks in 512 bytes | |
1716 | * 32 == size of vfs inode i_blocks * 8 | |
1717 | */ | |
1718 | upper_limit = (1LL << 32) - 1; | |
1719 | ||
1720 | /* total blocks in file system block size */ | |
1721 | upper_limit >>= (bits - 9); | |
1722 | ||
1723 | } else { | |
8180a562 AK |
1724 | /* |
1725 | * We use 48 bit ext4_inode i_blocks | |
1726 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
1727 | * represent total number of blocks in | |
1728 | * file system block size | |
1729 | */ | |
0fc1b451 AK |
1730 | upper_limit = (1LL << 48) - 1; |
1731 | ||
0fc1b451 AK |
1732 | } |
1733 | ||
1734 | /* indirect blocks */ | |
1735 | meta_blocks = 1; | |
1736 | /* double indirect blocks */ | |
1737 | meta_blocks += 1 + (1LL << (bits-2)); | |
1738 | /* tripple indirect blocks */ | |
1739 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1740 | ||
1741 | upper_limit -= meta_blocks; | |
1742 | upper_limit <<= bits; | |
ac27a0ec DK |
1743 | |
1744 | res += 1LL << (bits-2); | |
1745 | res += 1LL << (2*(bits-2)); | |
1746 | res += 1LL << (3*(bits-2)); | |
1747 | res <<= bits; | |
1748 | if (res > upper_limit) | |
1749 | res = upper_limit; | |
0fc1b451 AK |
1750 | |
1751 | if (res > MAX_LFS_FILESIZE) | |
1752 | res = MAX_LFS_FILESIZE; | |
1753 | ||
ac27a0ec DK |
1754 | return res; |
1755 | } | |
1756 | ||
617ba13b | 1757 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1758 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1759 | { |
617ba13b | 1760 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 1761 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
1762 | int has_super = 0; |
1763 | ||
1764 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
1765 | ||
617ba13b | 1766 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 1767 | nr < first_meta_bg) |
70bbb3e0 | 1768 | return logical_sb_block + nr + 1; |
ac27a0ec | 1769 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 1770 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 1771 | has_super = 1; |
617ba13b | 1772 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
1773 | } |
1774 | ||
c9de560d AT |
1775 | /** |
1776 | * ext4_get_stripe_size: Get the stripe size. | |
1777 | * @sbi: In memory super block info | |
1778 | * | |
1779 | * If we have specified it via mount option, then | |
1780 | * use the mount option value. If the value specified at mount time is | |
1781 | * greater than the blocks per group use the super block value. | |
1782 | * If the super block value is greater than blocks per group return 0. | |
1783 | * Allocator needs it be less than blocks per group. | |
1784 | * | |
1785 | */ | |
1786 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
1787 | { | |
1788 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
1789 | unsigned long stripe_width = | |
1790 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
1791 | ||
1792 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
1793 | return sbi->s_stripe; | |
1794 | ||
1795 | if (stripe_width <= sbi->s_blocks_per_group) | |
1796 | return stripe_width; | |
1797 | ||
1798 | if (stride <= sbi->s_blocks_per_group) | |
1799 | return stride; | |
1800 | ||
1801 | return 0; | |
1802 | } | |
ac27a0ec | 1803 | |
617ba13b | 1804 | static int ext4_fill_super (struct super_block *sb, void *data, int silent) |
1d03ec98 AK |
1805 | __releases(kernel_sem) |
1806 | __acquires(kernel_sem) | |
1807 | ||
ac27a0ec DK |
1808 | { |
1809 | struct buffer_head * bh; | |
617ba13b MC |
1810 | struct ext4_super_block *es = NULL; |
1811 | struct ext4_sb_info *sbi; | |
1812 | ext4_fsblk_t block; | |
1813 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 1814 | ext4_fsblk_t logical_sb_block; |
ac27a0ec DK |
1815 | unsigned long offset = 0; |
1816 | unsigned int journal_inum = 0; | |
1817 | unsigned long journal_devnum = 0; | |
1818 | unsigned long def_mount_opts; | |
1819 | struct inode *root; | |
1d1fe1ee | 1820 | int ret = -EINVAL; |
ac27a0ec | 1821 | int blocksize; |
ac27a0ec DK |
1822 | int db_count; |
1823 | int i; | |
1824 | int needs_recovery; | |
1825 | __le32 features; | |
bd81d8ee | 1826 | __u64 blocks_count; |
833f4077 | 1827 | int err; |
ac27a0ec DK |
1828 | |
1829 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
1830 | if (!sbi) | |
1831 | return -ENOMEM; | |
1832 | sb->s_fs_info = sbi; | |
1833 | sbi->s_mount_opt = 0; | |
617ba13b MC |
1834 | sbi->s_resuid = EXT4_DEF_RESUID; |
1835 | sbi->s_resgid = EXT4_DEF_RESGID; | |
d9c9bef1 | 1836 | sbi->s_sb_block = sb_block; |
ac27a0ec DK |
1837 | |
1838 | unlock_kernel(); | |
1839 | ||
617ba13b | 1840 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 1841 | if (!blocksize) { |
617ba13b | 1842 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
1843 | goto out_fail; |
1844 | } | |
1845 | ||
afc7cbca TS |
1846 | if (!sb_set_blocksize(sb, blocksize)) { |
1847 | printk(KERN_ERR "EXT4-fs: bad blocksize %d.\n", blocksize); | |
1848 | goto out_fail; | |
1849 | } | |
1850 | ||
ac27a0ec | 1851 | /* |
617ba13b | 1852 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
1853 | * block sizes. We need to calculate the offset from buffer start. |
1854 | */ | |
617ba13b | 1855 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
1856 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
1857 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 1858 | } else { |
70bbb3e0 | 1859 | logical_sb_block = sb_block; |
ac27a0ec DK |
1860 | } |
1861 | ||
70bbb3e0 | 1862 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
617ba13b | 1863 | printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
1864 | goto out_fail; |
1865 | } | |
1866 | /* | |
1867 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 1868 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 1869 | */ |
617ba13b | 1870 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
1871 | sbi->s_es = es; |
1872 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
1873 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
1874 | goto cantfind_ext4; | |
ac27a0ec DK |
1875 | |
1876 | /* Set defaults before we parse the mount options */ | |
1877 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 1878 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 1879 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 1880 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 1881 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 1882 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 1883 | set_opt(sbi->s_mount_opt, NO_UID32); |
2e7842b8 | 1884 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
617ba13b | 1885 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 1886 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 HD |
1887 | #endif |
1888 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL | |
617ba13b | 1889 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 1890 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 1891 | #endif |
617ba13b MC |
1892 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
1893 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
1894 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
1895 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
1896 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
1897 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
1898 | ||
1899 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 1900 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 1901 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 1902 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
1903 | else |
1904 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1905 | |
1906 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1907 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1908 | ||
1909 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1910 | ||
1e2462f9 MC |
1911 | /* |
1912 | * turn on extents feature by default in ext4 filesystem | |
1913 | * User -o noextents to turn it off | |
1914 | */ | |
1915 | set_opt(sbi->s_mount_opt, EXTENTS); | |
3dbd0ede AK |
1916 | /* |
1917 | * turn on mballoc feature by default in ext4 filesystem | |
1918 | * User -o nomballoc to turn it off | |
1919 | */ | |
1920 | set_opt(sbi->s_mount_opt, MBALLOC); | |
1e2462f9 | 1921 | |
ac27a0ec DK |
1922 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1923 | NULL, 0)) | |
1924 | goto failed_mount; | |
1925 | ||
1926 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 1927 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 1928 | |
617ba13b MC |
1929 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
1930 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1931 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1932 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 1933 | printk(KERN_WARNING |
617ba13b | 1934 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 1935 | "running e2fsck is recommended\n"); |
469108ff TT |
1936 | |
1937 | /* | |
1938 | * Since ext4 is still considered development code, we require | |
1939 | * that the TEST_FILESYS flag in s->flags be set. | |
1940 | */ | |
1941 | if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) { | |
1942 | printk(KERN_WARNING "EXT4-fs: %s: not marked " | |
1943 | "OK to use with test code.\n", sb->s_id); | |
1944 | goto failed_mount; | |
1945 | } | |
1946 | ||
ac27a0ec DK |
1947 | /* |
1948 | * Check feature flags regardless of the revision level, since we | |
1949 | * previously didn't change the revision level when setting the flags, | |
1950 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1951 | */ | |
617ba13b | 1952 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 1953 | if (features) { |
617ba13b | 1954 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
ac27a0ec DK |
1955 | "unsupported optional features (%x).\n", |
1956 | sb->s_id, le32_to_cpu(features)); | |
1957 | goto failed_mount; | |
1958 | } | |
617ba13b | 1959 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 1960 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 1961 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
ac27a0ec DK |
1962 | "unsupported optional features (%x).\n", |
1963 | sb->s_id, le32_to_cpu(features)); | |
1964 | goto failed_mount; | |
1965 | } | |
0fc1b451 AK |
1966 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { |
1967 | /* | |
1968 | * Large file size enabled file system can only be | |
1969 | * mount if kernel is build with CONFIG_LSF | |
1970 | */ | |
1971 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
1972 | !(sb->s_flags & MS_RDONLY)) { | |
1973 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
1974 | "files cannot be mounted read-write " | |
1975 | "without CONFIG_LSF.\n", sb->s_id); | |
1976 | goto failed_mount; | |
1977 | } | |
1978 | } | |
ac27a0ec DK |
1979 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
1980 | ||
617ba13b MC |
1981 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
1982 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 1983 | printk(KERN_ERR |
617ba13b | 1984 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
1985 | blocksize, sb->s_id); |
1986 | goto failed_mount; | |
1987 | } | |
1988 | ||
ac27a0ec | 1989 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
1990 | |
1991 | /* Validate the filesystem blocksize */ | |
1992 | if (!sb_set_blocksize(sb, blocksize)) { | |
1993 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
1994 | blocksize); | |
ac27a0ec DK |
1995 | goto failed_mount; |
1996 | } | |
1997 | ||
1998 | brelse (bh); | |
70bbb3e0 AM |
1999 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2000 | offset = do_div(logical_sb_block, blocksize); | |
2001 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2002 | if (!bh) { |
2003 | printk(KERN_ERR | |
617ba13b | 2004 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2005 | goto failed_mount; |
2006 | } | |
617ba13b | 2007 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2008 | sbi->s_es = es; |
617ba13b | 2009 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
ac27a0ec | 2010 | printk (KERN_ERR |
617ba13b | 2011 | "EXT4-fs: Magic mismatch, very weird !\n"); |
ac27a0ec DK |
2012 | goto failed_mount; |
2013 | } | |
2014 | } | |
2015 | ||
e2b46574 | 2016 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); |
617ba13b | 2017 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); |
ac27a0ec | 2018 | |
617ba13b MC |
2019 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2020 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2021 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2022 | } else { |
2023 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2024 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2025 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2026 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec DK |
2027 | (sbi->s_inode_size > blocksize)) { |
2028 | printk (KERN_ERR | |
617ba13b | 2029 | "EXT4-fs: unsupported inode size: %d\n", |
ac27a0ec DK |
2030 | sbi->s_inode_size); |
2031 | goto failed_mount; | |
2032 | } | |
ef7f3835 KS |
2033 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2034 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2035 | } |
0d1ee42f AR |
2036 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2037 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2038 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2039 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2040 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2041 | printk(KERN_ERR |
8fadc143 | 2042 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2043 | sbi->s_desc_size); |
2044 | goto failed_mount; | |
2045 | } | |
2046 | } else | |
2047 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2048 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2049 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2050 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2051 | goto cantfind_ext4; |
2052 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2053 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2054 | goto cantfind_ext4; |
ac27a0ec DK |
2055 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2056 | sbi->s_inodes_per_block; | |
0d1ee42f | 2057 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2058 | sbi->s_sbh = bh; |
2059 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2060 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2061 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
ac27a0ec DK |
2062 | for (i=0; i < 4; i++) |
2063 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
2064 | sbi->s_def_hash_version = es->s_def_hash_version; | |
2065 | ||
2066 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2067 | printk (KERN_ERR | |
617ba13b | 2068 | "EXT4-fs: #blocks per group too big: %lu\n", |
ac27a0ec DK |
2069 | sbi->s_blocks_per_group); |
2070 | goto failed_mount; | |
2071 | } | |
ac27a0ec DK |
2072 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2073 | printk (KERN_ERR | |
617ba13b | 2074 | "EXT4-fs: #inodes per group too big: %lu\n", |
ac27a0ec DK |
2075 | sbi->s_inodes_per_group); |
2076 | goto failed_mount; | |
2077 | } | |
2078 | ||
bd81d8ee | 2079 | if (ext4_blocks_count(es) > |
ac27a0ec | 2080 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2081 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2082 | " too large to mount safely\n", sb->s_id); |
2083 | if (sizeof(sector_t) < 8) | |
617ba13b | 2084 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2085 | "enabled\n"); |
2086 | goto failed_mount; | |
2087 | } | |
2088 | ||
617ba13b MC |
2089 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2090 | goto cantfind_ext4; | |
e7c95593 ES |
2091 | |
2092 | /* ensure blocks_count calculation below doesn't sign-extend */ | |
2093 | if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < | |
2094 | le32_to_cpu(es->s_first_data_block) + 1) { | |
2095 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " | |
2096 | "first data block %u, blocks per group %lu\n", | |
2097 | ext4_blocks_count(es), | |
2098 | le32_to_cpu(es->s_first_data_block), | |
2099 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2100 | goto failed_mount; | |
2101 | } | |
bd81d8ee LV |
2102 | blocks_count = (ext4_blocks_count(es) - |
2103 | le32_to_cpu(es->s_first_data_block) + | |
2104 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2105 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
2106 | sbi->s_groups_count = blocks_count; | |
617ba13b MC |
2107 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2108 | EXT4_DESC_PER_BLOCK(sb); | |
ac27a0ec DK |
2109 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
2110 | GFP_KERNEL); | |
2111 | if (sbi->s_group_desc == NULL) { | |
617ba13b | 2112 | printk (KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2113 | goto failed_mount; |
2114 | } | |
2115 | ||
2116 | bgl_lock_init(&sbi->s_blockgroup_lock); | |
2117 | ||
2118 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2119 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2120 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2121 | if (!sbi->s_group_desc[i]) { | |
617ba13b | 2122 | printk (KERN_ERR "EXT4-fs: " |
ac27a0ec DK |
2123 | "can't read group descriptor %d\n", i); |
2124 | db_count = i; | |
2125 | goto failed_mount2; | |
2126 | } | |
2127 | } | |
617ba13b MC |
2128 | if (!ext4_check_descriptors (sb)) { |
2129 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); | |
ac27a0ec DK |
2130 | goto failed_mount2; |
2131 | } | |
2132 | sbi->s_gdb_count = db_count; | |
2133 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2134 | spin_lock_init(&sbi->s_next_gen_lock); | |
2135 | ||
833f4077 PZ |
2136 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2137 | ext4_count_free_blocks(sb)); | |
2138 | if (!err) { | |
2139 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2140 | ext4_count_free_inodes(sb)); | |
2141 | } | |
2142 | if (!err) { | |
2143 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2144 | ext4_count_dirs(sb)); | |
2145 | } | |
2146 | if (err) { | |
2147 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2148 | goto failed_mount3; | |
2149 | } | |
ac27a0ec DK |
2150 | |
2151 | /* per fileystem reservation list head & lock */ | |
2152 | spin_lock_init(&sbi->s_rsv_window_lock); | |
2153 | sbi->s_rsv_window_root = RB_ROOT; | |
2154 | /* Add a single, static dummy reservation to the start of the | |
2155 | * reservation window list --- it gives us a placeholder for | |
2156 | * append-at-start-of-list which makes the allocation logic | |
2157 | * _much_ simpler. */ | |
617ba13b MC |
2158 | sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; |
2159 | sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; | |
ac27a0ec DK |
2160 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; |
2161 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
617ba13b | 2162 | ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); |
ac27a0ec | 2163 | |
c9de560d AT |
2164 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2165 | ||
ac27a0ec DK |
2166 | /* |
2167 | * set up enough so that it can read an inode | |
2168 | */ | |
617ba13b MC |
2169 | sb->s_op = &ext4_sops; |
2170 | sb->s_export_op = &ext4_export_ops; | |
2171 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2172 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2173 | sb->s_qcop = &ext4_qctl_operations; |
2174 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2175 | #endif |
2176 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
2177 | ||
2178 | sb->s_root = NULL; | |
2179 | ||
2180 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2181 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2182 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2183 | |
2184 | /* | |
2185 | * The first inode we look at is the journal inode. Don't try | |
2186 | * root first: it may be modified in the journal! | |
2187 | */ | |
2188 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2189 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2190 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec DK |
2191 | goto failed_mount3; |
2192 | } else if (journal_inum) { | |
617ba13b | 2193 | if (ext4_create_journal(sb, es, journal_inum)) |
ac27a0ec DK |
2194 | goto failed_mount3; |
2195 | } else { | |
2196 | if (!silent) | |
2197 | printk (KERN_ERR | |
617ba13b | 2198 | "ext4: No journal on filesystem on %s\n", |
ac27a0ec DK |
2199 | sb->s_id); |
2200 | goto failed_mount3; | |
2201 | } | |
2202 | ||
eb40a09c JS |
2203 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2204 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2205 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
2206 | printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); | |
2207 | goto failed_mount4; | |
2208 | } | |
2209 | ||
818d276c GS |
2210 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2211 | jbd2_journal_set_features(sbi->s_journal, | |
2212 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2213 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2214 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2215 | jbd2_journal_set_features(sbi->s_journal, | |
2216 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2217 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2218 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2219 | } else { | |
2220 | jbd2_journal_clear_features(sbi->s_journal, | |
2221 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2222 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2223 | } | |
2224 | ||
ac27a0ec DK |
2225 | /* We have now updated the journal if required, so we can |
2226 | * validate the data journaling mode. */ | |
2227 | switch (test_opt(sb, DATA_FLAGS)) { | |
2228 | case 0: | |
2229 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2230 | * capabilities: ORDERED_DATA if the journal can |
2231 | * cope, else JOURNAL_DATA | |
2232 | */ | |
dab291af MC |
2233 | if (jbd2_journal_check_available_features |
2234 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2235 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2236 | else | |
2237 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2238 | break; | |
2239 | ||
617ba13b MC |
2240 | case EXT4_MOUNT_ORDERED_DATA: |
2241 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2242 | if (!jbd2_journal_check_available_features |
2243 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2244 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2245 | "requested data journaling mode\n"); |
2246 | goto failed_mount4; | |
2247 | } | |
2248 | default: | |
2249 | break; | |
2250 | } | |
2251 | ||
2252 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2253 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2254 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2255 | "its supported only with writeback mode\n"); |
2256 | clear_opt(sbi->s_mount_opt, NOBH); | |
2257 | } | |
2258 | } | |
2259 | /* | |
dab291af | 2260 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2261 | * so we can safely mount the rest of the filesystem now. |
2262 | */ | |
2263 | ||
1d1fe1ee DH |
2264 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2265 | if (IS_ERR(root)) { | |
617ba13b | 2266 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2267 | ret = PTR_ERR(root); |
ac27a0ec DK |
2268 | goto failed_mount4; |
2269 | } | |
2270 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2271 | iput(root); |
617ba13b | 2272 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2273 | goto failed_mount4; |
2274 | } | |
1d1fe1ee DH |
2275 | sb->s_root = d_alloc_root(root); |
2276 | if (!sb->s_root) { | |
2277 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2278 | iput(root); | |
2279 | ret = -ENOMEM; | |
2280 | goto failed_mount4; | |
2281 | } | |
ac27a0ec | 2282 | |
617ba13b | 2283 | ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2284 | |
2285 | /* determine the minimum size of new large inodes, if present */ | |
2286 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2287 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2288 | EXT4_GOOD_OLD_INODE_SIZE; | |
2289 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2290 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2291 | if (sbi->s_want_extra_isize < | |
2292 | le16_to_cpu(es->s_want_extra_isize)) | |
2293 | sbi->s_want_extra_isize = | |
2294 | le16_to_cpu(es->s_want_extra_isize); | |
2295 | if (sbi->s_want_extra_isize < | |
2296 | le16_to_cpu(es->s_min_extra_isize)) | |
2297 | sbi->s_want_extra_isize = | |
2298 | le16_to_cpu(es->s_min_extra_isize); | |
2299 | } | |
2300 | } | |
2301 | /* Check if enough inode space is available */ | |
2302 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2303 | sbi->s_inode_size) { | |
2304 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2305 | EXT4_GOOD_OLD_INODE_SIZE; | |
2306 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2307 | "available.\n"); | |
2308 | } | |
2309 | ||
ac27a0ec DK |
2310 | /* |
2311 | * akpm: core read_super() calls in here with the superblock locked. | |
2312 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
2313 | * in numerous places. Here we just pop the lock - it's relatively | |
2314 | * harmless, because we are now ready to accept write_super() requests, | |
2315 | * and aviro says that's the only reason for hanging onto the | |
2316 | * superblock lock. | |
2317 | */ | |
617ba13b MC |
2318 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2319 | ext4_orphan_cleanup(sb, es); | |
2320 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
ac27a0ec | 2321 | if (needs_recovery) |
617ba13b MC |
2322 | printk (KERN_INFO "EXT4-fs: recovery complete.\n"); |
2323 | ext4_mark_recovery_complete(sb, es); | |
2324 | printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", | |
2325 | test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": | |
2326 | test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": | |
ac27a0ec DK |
2327 | "writeback"); |
2328 | ||
a86c6181 | 2329 | ext4_ext_init(sb); |
c9de560d | 2330 | ext4_mb_init(sb, needs_recovery); |
a86c6181 | 2331 | |
ac27a0ec DK |
2332 | lock_kernel(); |
2333 | return 0; | |
2334 | ||
617ba13b | 2335 | cantfind_ext4: |
ac27a0ec | 2336 | if (!silent) |
617ba13b | 2337 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2338 | sb->s_id); |
2339 | goto failed_mount; | |
2340 | ||
2341 | failed_mount4: | |
dab291af | 2342 | jbd2_journal_destroy(sbi->s_journal); |
ac27a0ec DK |
2343 | failed_mount3: |
2344 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2345 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2346 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
2347 | failed_mount2: | |
2348 | for (i = 0; i < db_count; i++) | |
2349 | brelse(sbi->s_group_desc[i]); | |
2350 | kfree(sbi->s_group_desc); | |
2351 | failed_mount: | |
2352 | #ifdef CONFIG_QUOTA | |
2353 | for (i = 0; i < MAXQUOTAS; i++) | |
2354 | kfree(sbi->s_qf_names[i]); | |
2355 | #endif | |
617ba13b | 2356 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2357 | brelse(bh); |
2358 | out_fail: | |
2359 | sb->s_fs_info = NULL; | |
2360 | kfree(sbi); | |
2361 | lock_kernel(); | |
1d1fe1ee | 2362 | return ret; |
ac27a0ec DK |
2363 | } |
2364 | ||
2365 | /* | |
2366 | * Setup any per-fs journal parameters now. We'll do this both on | |
2367 | * initial mount, once the journal has been initialised but before we've | |
2368 | * done any recovery; and again on any subsequent remount. | |
2369 | */ | |
617ba13b | 2370 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2371 | { |
617ba13b | 2372 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
2373 | |
2374 | if (sbi->s_commit_interval) | |
2375 | journal->j_commit_interval = sbi->s_commit_interval; | |
617ba13b | 2376 | /* We could also set up an ext4-specific default for the commit |
ac27a0ec DK |
2377 | * interval here, but for now we'll just fall back to the jbd |
2378 | * default. */ | |
2379 | ||
2380 | spin_lock(&journal->j_state_lock); | |
2381 | if (test_opt(sb, BARRIER)) | |
dab291af | 2382 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2383 | else |
dab291af | 2384 | journal->j_flags &= ~JBD2_BARRIER; |
ac27a0ec DK |
2385 | spin_unlock(&journal->j_state_lock); |
2386 | } | |
2387 | ||
617ba13b | 2388 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2389 | unsigned int journal_inum) |
2390 | { | |
2391 | struct inode *journal_inode; | |
2392 | journal_t *journal; | |
2393 | ||
2394 | /* First, test for the existence of a valid inode on disk. Bad | |
2395 | * things happen if we iget() an unused inode, as the subsequent | |
2396 | * iput() will try to delete it. */ | |
2397 | ||
1d1fe1ee DH |
2398 | journal_inode = ext4_iget(sb, journal_inum); |
2399 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2400 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2401 | return NULL; |
2402 | } | |
2403 | if (!journal_inode->i_nlink) { | |
2404 | make_bad_inode(journal_inode); | |
2405 | iput(journal_inode); | |
617ba13b | 2406 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2407 | return NULL; |
2408 | } | |
2409 | ||
2410 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2411 | journal_inode, journal_inode->i_size); | |
1d1fe1ee | 2412 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2413 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2414 | iput(journal_inode); |
2415 | return NULL; | |
2416 | } | |
2417 | ||
dab291af | 2418 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2419 | if (!journal) { |
617ba13b | 2420 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2421 | iput(journal_inode); |
2422 | return NULL; | |
2423 | } | |
2424 | journal->j_private = sb; | |
617ba13b | 2425 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2426 | return journal; |
2427 | } | |
2428 | ||
617ba13b | 2429 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2430 | dev_t j_dev) |
2431 | { | |
2432 | struct buffer_head * bh; | |
2433 | journal_t *journal; | |
617ba13b MC |
2434 | ext4_fsblk_t start; |
2435 | ext4_fsblk_t len; | |
ac27a0ec | 2436 | int hblock, blocksize; |
617ba13b | 2437 | ext4_fsblk_t sb_block; |
ac27a0ec | 2438 | unsigned long offset; |
617ba13b | 2439 | struct ext4_super_block * es; |
ac27a0ec DK |
2440 | struct block_device *bdev; |
2441 | ||
617ba13b | 2442 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2443 | if (bdev == NULL) |
2444 | return NULL; | |
2445 | ||
2446 | if (bd_claim(bdev, sb)) { | |
2447 | printk(KERN_ERR | |
8c55e204 | 2448 | "EXT4: failed to claim external journal device.\n"); |
ac27a0ec DK |
2449 | blkdev_put(bdev); |
2450 | return NULL; | |
2451 | } | |
2452 | ||
2453 | blocksize = sb->s_blocksize; | |
2454 | hblock = bdev_hardsect_size(bdev); | |
2455 | if (blocksize < hblock) { | |
2456 | printk(KERN_ERR | |
617ba13b | 2457 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2458 | goto out_bdev; |
2459 | } | |
2460 | ||
617ba13b MC |
2461 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2462 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2463 | set_blocksize(bdev, blocksize); |
2464 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2465 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2466 | "external journal\n"); |
2467 | goto out_bdev; | |
2468 | } | |
2469 | ||
617ba13b MC |
2470 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2471 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2472 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2473 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
2474 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
2475 | "bad superblock\n"); |
2476 | brelse(bh); | |
2477 | goto out_bdev; | |
2478 | } | |
2479 | ||
617ba13b MC |
2480 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
2481 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
2482 | brelse(bh); |
2483 | goto out_bdev; | |
2484 | } | |
2485 | ||
bd81d8ee | 2486 | len = ext4_blocks_count(es); |
ac27a0ec DK |
2487 | start = sb_block + 1; |
2488 | brelse(bh); /* we're done with the superblock */ | |
2489 | ||
dab291af | 2490 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
2491 | start, len, blocksize); |
2492 | if (!journal) { | |
617ba13b | 2493 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
2494 | goto out_bdev; |
2495 | } | |
2496 | journal->j_private = sb; | |
2497 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2498 | wait_on_buffer(journal->j_sb_buffer); | |
2499 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 2500 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
2501 | goto out_journal; |
2502 | } | |
2503 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 2504 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
2505 | "user (unsupported) - %d\n", |
2506 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2507 | goto out_journal; | |
2508 | } | |
617ba13b MC |
2509 | EXT4_SB(sb)->journal_bdev = bdev; |
2510 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
2511 | return journal; |
2512 | out_journal: | |
dab291af | 2513 | jbd2_journal_destroy(journal); |
ac27a0ec | 2514 | out_bdev: |
617ba13b | 2515 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
2516 | return NULL; |
2517 | } | |
2518 | ||
617ba13b MC |
2519 | static int ext4_load_journal(struct super_block *sb, |
2520 | struct ext4_super_block *es, | |
ac27a0ec DK |
2521 | unsigned long journal_devnum) |
2522 | { | |
2523 | journal_t *journal; | |
2524 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
2525 | dev_t journal_dev; | |
2526 | int err = 0; | |
2527 | int really_read_only; | |
2528 | ||
2529 | if (journal_devnum && | |
2530 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 2531 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
2532 | "numbers have changed\n"); |
2533 | journal_dev = new_decode_dev(journal_devnum); | |
2534 | } else | |
2535 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2536 | ||
2537 | really_read_only = bdev_read_only(sb->s_bdev); | |
2538 | ||
2539 | /* | |
2540 | * Are we loading a blank journal or performing recovery after a | |
2541 | * crash? For recovery, we need to check in advance whether we | |
2542 | * can get read-write access to the device. | |
2543 | */ | |
2544 | ||
617ba13b | 2545 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 2546 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 2547 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
2548 | "required on readonly filesystem.\n"); |
2549 | if (really_read_only) { | |
617ba13b | 2550 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
2551 | "unavailable, cannot proceed.\n"); |
2552 | return -EROFS; | |
2553 | } | |
617ba13b | 2554 | printk (KERN_INFO "EXT4-fs: write access will " |
ac27a0ec DK |
2555 | "be enabled during recovery.\n"); |
2556 | } | |
2557 | } | |
2558 | ||
2559 | if (journal_inum && journal_dev) { | |
617ba13b | 2560 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
2561 | "and inode journals!\n"); |
2562 | return -EINVAL; | |
2563 | } | |
2564 | ||
2565 | if (journal_inum) { | |
617ba13b | 2566 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
2567 | return -EINVAL; |
2568 | } else { | |
617ba13b | 2569 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
2570 | return -EINVAL; |
2571 | } | |
2572 | ||
2573 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { | |
dab291af | 2574 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 2575 | if (err) { |
617ba13b | 2576 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 2577 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2578 | return err; |
2579 | } | |
2580 | } | |
2581 | ||
617ba13b | 2582 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 2583 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 2584 | if (!err) |
dab291af | 2585 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
2586 | |
2587 | if (err) { | |
617ba13b | 2588 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 2589 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2590 | return err; |
2591 | } | |
2592 | ||
617ba13b MC |
2593 | EXT4_SB(sb)->s_journal = journal; |
2594 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
2595 | |
2596 | if (journal_devnum && | |
2597 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2598 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
2599 | sb->s_dirt = 1; | |
2600 | ||
2601 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2602 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2603 | } |
2604 | ||
2605 | return 0; | |
2606 | } | |
2607 | ||
617ba13b MC |
2608 | static int ext4_create_journal(struct super_block * sb, |
2609 | struct ext4_super_block * es, | |
ac27a0ec DK |
2610 | unsigned int journal_inum) |
2611 | { | |
2612 | journal_t *journal; | |
6c675bd4 | 2613 | int err; |
ac27a0ec DK |
2614 | |
2615 | if (sb->s_flags & MS_RDONLY) { | |
617ba13b | 2616 | printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " |
ac27a0ec DK |
2617 | "create journal.\n"); |
2618 | return -EROFS; | |
2619 | } | |
2620 | ||
6c675bd4 BP |
2621 | journal = ext4_get_journal(sb, journal_inum); |
2622 | if (!journal) | |
ac27a0ec DK |
2623 | return -EINVAL; |
2624 | ||
617ba13b | 2625 | printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", |
ac27a0ec DK |
2626 | journal_inum); |
2627 | ||
6c675bd4 BP |
2628 | err = jbd2_journal_create(journal); |
2629 | if (err) { | |
617ba13b | 2630 | printk(KERN_ERR "EXT4-fs: error creating journal.\n"); |
dab291af | 2631 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2632 | return -EIO; |
2633 | } | |
2634 | ||
617ba13b | 2635 | EXT4_SB(sb)->s_journal = journal; |
ac27a0ec | 2636 | |
617ba13b MC |
2637 | ext4_update_dynamic_rev(sb); |
2638 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
2639 | EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); | |
ac27a0ec DK |
2640 | |
2641 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
2642 | sb->s_dirt = 1; | |
2643 | ||
2644 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2645 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2646 | |
2647 | return 0; | |
2648 | } | |
2649 | ||
617ba13b MC |
2650 | static void ext4_commit_super (struct super_block * sb, |
2651 | struct ext4_super_block * es, | |
ac27a0ec DK |
2652 | int sync) |
2653 | { | |
617ba13b | 2654 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
ac27a0ec DK |
2655 | |
2656 | if (!sbh) | |
2657 | return; | |
2658 | es->s_wtime = cpu_to_le32(get_seconds()); | |
bd81d8ee | 2659 | ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); |
617ba13b | 2660 | es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2661 | BUFFER_TRACE(sbh, "marking dirty"); |
2662 | mark_buffer_dirty(sbh); | |
2663 | if (sync) | |
2664 | sync_dirty_buffer(sbh); | |
2665 | } | |
2666 | ||
2667 | ||
2668 | /* | |
2669 | * Have we just finished recovery? If so, and if we are mounting (or | |
2670 | * remounting) the filesystem readonly, then we will end up with a | |
2671 | * consistent fs on disk. Record that fact. | |
2672 | */ | |
617ba13b MC |
2673 | static void ext4_mark_recovery_complete(struct super_block * sb, |
2674 | struct ext4_super_block * es) | |
ac27a0ec | 2675 | { |
617ba13b | 2676 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2677 | |
dab291af MC |
2678 | jbd2_journal_lock_updates(journal); |
2679 | jbd2_journal_flush(journal); | |
32c37730 | 2680 | lock_super(sb); |
617ba13b | 2681 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 2682 | sb->s_flags & MS_RDONLY) { |
617ba13b | 2683 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 2684 | sb->s_dirt = 0; |
617ba13b | 2685 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2686 | } |
32c37730 | 2687 | unlock_super(sb); |
dab291af | 2688 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
2689 | } |
2690 | ||
2691 | /* | |
2692 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2693 | * has recorded an error from a previous lifetime, move that error to the | |
2694 | * main filesystem now. | |
2695 | */ | |
617ba13b MC |
2696 | static void ext4_clear_journal_err(struct super_block * sb, |
2697 | struct ext4_super_block * es) | |
ac27a0ec DK |
2698 | { |
2699 | journal_t *journal; | |
2700 | int j_errno; | |
2701 | const char *errstr; | |
2702 | ||
617ba13b | 2703 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2704 | |
2705 | /* | |
2706 | * Now check for any error status which may have been recorded in the | |
617ba13b | 2707 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
2708 | */ |
2709 | ||
dab291af | 2710 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
2711 | if (j_errno) { |
2712 | char nbuf[16]; | |
2713 | ||
617ba13b | 2714 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 2715 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 2716 | "from previous mount: %s", errstr); |
46e665e9 | 2717 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
2718 | "filesystem check."); |
2719 | ||
617ba13b MC |
2720 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
2721 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2722 | ext4_commit_super (sb, es, 1); | |
ac27a0ec | 2723 | |
dab291af | 2724 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
2725 | } |
2726 | } | |
2727 | ||
2728 | /* | |
2729 | * Force the running and committing transactions to commit, | |
2730 | * and wait on the commit. | |
2731 | */ | |
617ba13b | 2732 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
2733 | { |
2734 | journal_t *journal; | |
2735 | int ret; | |
2736 | ||
2737 | if (sb->s_flags & MS_RDONLY) | |
2738 | return 0; | |
2739 | ||
617ba13b | 2740 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2741 | sb->s_dirt = 0; |
617ba13b | 2742 | ret = ext4_journal_force_commit(journal); |
ac27a0ec DK |
2743 | return ret; |
2744 | } | |
2745 | ||
2746 | /* | |
617ba13b | 2747 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec DK |
2748 | * have to propagate any other updates to the superblock on disk at this |
2749 | * point. Just start an async writeback to get the buffers on their way | |
2750 | * to the disk. | |
2751 | * | |
2752 | * This implicitly triggers the writebehind on sync(). | |
2753 | */ | |
2754 | ||
617ba13b | 2755 | static void ext4_write_super (struct super_block * sb) |
ac27a0ec DK |
2756 | { |
2757 | if (mutex_trylock(&sb->s_lock) != 0) | |
2758 | BUG(); | |
2759 | sb->s_dirt = 0; | |
2760 | } | |
2761 | ||
617ba13b | 2762 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec DK |
2763 | { |
2764 | tid_t target; | |
2765 | ||
2766 | sb->s_dirt = 0; | |
dab291af | 2767 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { |
ac27a0ec | 2768 | if (wait) |
dab291af | 2769 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); |
ac27a0ec DK |
2770 | } |
2771 | return 0; | |
2772 | } | |
2773 | ||
2774 | /* | |
2775 | * LVM calls this function before a (read-only) snapshot is created. This | |
2776 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2777 | */ | |
617ba13b | 2778 | static void ext4_write_super_lockfs(struct super_block *sb) |
ac27a0ec DK |
2779 | { |
2780 | sb->s_dirt = 0; | |
2781 | ||
2782 | if (!(sb->s_flags & MS_RDONLY)) { | |
617ba13b | 2783 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2784 | |
2785 | /* Now we set up the journal barrier. */ | |
dab291af MC |
2786 | jbd2_journal_lock_updates(journal); |
2787 | jbd2_journal_flush(journal); | |
ac27a0ec DK |
2788 | |
2789 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b MC |
2790 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2791 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec DK |
2792 | } |
2793 | } | |
2794 | ||
2795 | /* | |
2796 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2797 | * flag here, even though the filesystem is not technically dirty yet. | |
2798 | */ | |
617ba13b | 2799 | static void ext4_unlockfs(struct super_block *sb) |
ac27a0ec DK |
2800 | { |
2801 | if (!(sb->s_flags & MS_RDONLY)) { | |
2802 | lock_super(sb); | |
2803 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
2804 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2805 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 2806 | unlock_super(sb); |
dab291af | 2807 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec DK |
2808 | } |
2809 | } | |
2810 | ||
617ba13b | 2811 | static int ext4_remount (struct super_block * sb, int * flags, char * data) |
ac27a0ec | 2812 | { |
617ba13b MC |
2813 | struct ext4_super_block * es; |
2814 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2815 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 2816 | unsigned long old_sb_flags; |
617ba13b | 2817 | struct ext4_mount_options old_opts; |
ac27a0ec DK |
2818 | int err; |
2819 | #ifdef CONFIG_QUOTA | |
2820 | int i; | |
2821 | #endif | |
2822 | ||
2823 | /* Store the original options */ | |
2824 | old_sb_flags = sb->s_flags; | |
2825 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2826 | old_opts.s_resuid = sbi->s_resuid; | |
2827 | old_opts.s_resgid = sbi->s_resgid; | |
2828 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2829 | #ifdef CONFIG_QUOTA | |
2830 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2831 | for (i = 0; i < MAXQUOTAS; i++) | |
2832 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2833 | #endif | |
2834 | ||
2835 | /* | |
2836 | * Allow the "check" option to be passed as a remount option. | |
2837 | */ | |
2838 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { | |
2839 | err = -EINVAL; | |
2840 | goto restore_opts; | |
2841 | } | |
2842 | ||
617ba13b | 2843 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 2844 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
2845 | |
2846 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2847 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
2848 | |
2849 | es = sbi->s_es; | |
2850 | ||
617ba13b | 2851 | ext4_init_journal_params(sb, sbi->s_journal); |
ac27a0ec DK |
2852 | |
2853 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 2854 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 2855 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
2856 | err = -EROFS; |
2857 | goto restore_opts; | |
2858 | } | |
2859 | ||
2860 | if (*flags & MS_RDONLY) { | |
2861 | /* | |
2862 | * First of all, the unconditional stuff we have to do | |
2863 | * to disable replay of the journal when we next remount | |
2864 | */ | |
2865 | sb->s_flags |= MS_RDONLY; | |
2866 | ||
2867 | /* | |
2868 | * OK, test if we are remounting a valid rw partition | |
2869 | * readonly, and if so set the rdonly flag and then | |
2870 | * mark the partition as valid again. | |
2871 | */ | |
617ba13b MC |
2872 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
2873 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
2874 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
2875 | ||
32c37730 JK |
2876 | /* |
2877 | * We have to unlock super so that we can wait for | |
2878 | * transactions. | |
2879 | */ | |
2880 | unlock_super(sb); | |
617ba13b | 2881 | ext4_mark_recovery_complete(sb, es); |
32c37730 | 2882 | lock_super(sb); |
ac27a0ec DK |
2883 | } else { |
2884 | __le32 ret; | |
617ba13b MC |
2885 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2886 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
2887 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec DK |
2888 | "remount RDWR because of unsupported " |
2889 | "optional features (%x).\n", | |
2890 | sb->s_id, le32_to_cpu(ret)); | |
2891 | err = -EROFS; | |
2892 | goto restore_opts; | |
2893 | } | |
ead6596b ES |
2894 | |
2895 | /* | |
2896 | * If we have an unprocessed orphan list hanging | |
2897 | * around from a previously readonly bdev mount, | |
2898 | * require a full umount/remount for now. | |
2899 | */ | |
2900 | if (es->s_last_orphan) { | |
2901 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
2902 | "remount RDWR because of unprocessed " | |
2903 | "orphan inode list. Please " | |
2904 | "umount/remount instead.\n", | |
2905 | sb->s_id); | |
2906 | err = -EINVAL; | |
2907 | goto restore_opts; | |
2908 | } | |
2909 | ||
ac27a0ec DK |
2910 | /* |
2911 | * Mounting a RDONLY partition read-write, so reread | |
2912 | * and store the current valid flag. (It may have | |
2913 | * been changed by e2fsck since we originally mounted | |
2914 | * the partition.) | |
2915 | */ | |
617ba13b | 2916 | ext4_clear_journal_err(sb, es); |
ac27a0ec | 2917 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 2918 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 2919 | goto restore_opts; |
617ba13b | 2920 | if (!ext4_setup_super (sb, es, 0)) |
ac27a0ec DK |
2921 | sb->s_flags &= ~MS_RDONLY; |
2922 | } | |
2923 | } | |
2924 | #ifdef CONFIG_QUOTA | |
2925 | /* Release old quota file names */ | |
2926 | for (i = 0; i < MAXQUOTAS; i++) | |
2927 | if (old_opts.s_qf_names[i] && | |
2928 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2929 | kfree(old_opts.s_qf_names[i]); | |
2930 | #endif | |
2931 | return 0; | |
2932 | restore_opts: | |
2933 | sb->s_flags = old_sb_flags; | |
2934 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2935 | sbi->s_resuid = old_opts.s_resuid; | |
2936 | sbi->s_resgid = old_opts.s_resgid; | |
2937 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2938 | #ifdef CONFIG_QUOTA | |
2939 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2940 | for (i = 0; i < MAXQUOTAS; i++) { | |
2941 | if (sbi->s_qf_names[i] && | |
2942 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2943 | kfree(sbi->s_qf_names[i]); | |
2944 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2945 | } | |
2946 | #endif | |
2947 | return err; | |
2948 | } | |
2949 | ||
617ba13b | 2950 | static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) |
ac27a0ec DK |
2951 | { |
2952 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
2953 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2954 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 2955 | u64 fsid; |
ac27a0ec | 2956 | |
5e70030d BP |
2957 | if (test_opt(sb, MINIX_DF)) { |
2958 | sbi->s_overhead_last = 0; | |
6bc9feff | 2959 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
fd2d4291 | 2960 | ext4_group_t ngroups = sbi->s_groups_count, i; |
5e70030d | 2961 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
2962 | smp_rmb(); |
2963 | ||
2964 | /* | |
5e70030d BP |
2965 | * Compute the overhead (FS structures). This is constant |
2966 | * for a given filesystem unless the number of block groups | |
2967 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
2968 | */ |
2969 | ||
2970 | /* | |
2971 | * All of the blocks before first_data_block are | |
2972 | * overhead | |
2973 | */ | |
2974 | overhead = le32_to_cpu(es->s_first_data_block); | |
2975 | ||
2976 | /* | |
2977 | * Add the overhead attributed to the superblock and | |
2978 | * block group descriptors. If the sparse superblocks | |
2979 | * feature is turned on, then not all groups have this. | |
2980 | */ | |
2981 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
2982 | overhead += ext4_bg_has_super(sb, i) + |
2983 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
2984 | cond_resched(); |
2985 | } | |
2986 | ||
2987 | /* | |
2988 | * Every block group has an inode bitmap, a block | |
2989 | * bitmap, and an inode table. | |
2990 | */ | |
5e70030d BP |
2991 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2992 | sbi->s_overhead_last = overhead; | |
2993 | smp_wmb(); | |
6bc9feff | 2994 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
2995 | } |
2996 | ||
617ba13b | 2997 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 2998 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 2999 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
52d9f3b4 | 3000 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); |
308ba3ec | 3001 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3002 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3003 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3004 | buf->f_bavail = 0; |
3005 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3006 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3007 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3008 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3009 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3010 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3011 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3012 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3013 | return 0; |
3014 | } | |
3015 | ||
3016 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3017 | * is locked for write. Otherwise the are possible deadlocks: | |
3018 | * Process 1 Process 2 | |
617ba13b | 3019 | * ext4_create() quota_sync() |
dab291af | 3020 | * jbd2_journal_start() write_dquot() |
ac27a0ec | 3021 | * DQUOT_INIT() down(dqio_mutex) |
dab291af | 3022 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3023 | * |
3024 | */ | |
3025 | ||
3026 | #ifdef CONFIG_QUOTA | |
3027 | ||
3028 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3029 | { | |
3030 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3031 | } | |
3032 | ||
617ba13b | 3033 | static int ext4_dquot_initialize(struct inode *inode, int type) |
ac27a0ec DK |
3034 | { |
3035 | handle_t *handle; | |
3036 | int ret, err; | |
3037 | ||
3038 | /* We may create quota structure so we need to reserve enough blocks */ | |
617ba13b | 3039 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); |
ac27a0ec DK |
3040 | if (IS_ERR(handle)) |
3041 | return PTR_ERR(handle); | |
3042 | ret = dquot_initialize(inode, type); | |
617ba13b | 3043 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3044 | if (!ret) |
3045 | ret = err; | |
3046 | return ret; | |
3047 | } | |
3048 | ||
617ba13b | 3049 | static int ext4_dquot_drop(struct inode *inode) |
ac27a0ec DK |
3050 | { |
3051 | handle_t *handle; | |
3052 | int ret, err; | |
3053 | ||
3054 | /* We may delete quota structure so we need to reserve enough blocks */ | |
617ba13b | 3055 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); |
2887df13 JK |
3056 | if (IS_ERR(handle)) { |
3057 | /* | |
3058 | * We call dquot_drop() anyway to at least release references | |
3059 | * to quota structures so that umount does not hang. | |
3060 | */ | |
3061 | dquot_drop(inode); | |
ac27a0ec | 3062 | return PTR_ERR(handle); |
2887df13 | 3063 | } |
ac27a0ec | 3064 | ret = dquot_drop(inode); |
617ba13b | 3065 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3066 | if (!ret) |
3067 | ret = err; | |
3068 | return ret; | |
3069 | } | |
3070 | ||
617ba13b | 3071 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3072 | { |
3073 | int ret, err; | |
3074 | handle_t *handle; | |
3075 | struct inode *inode; | |
3076 | ||
3077 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3078 | handle = ext4_journal_start(inode, |
3079 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3080 | if (IS_ERR(handle)) |
3081 | return PTR_ERR(handle); | |
3082 | ret = dquot_commit(dquot); | |
617ba13b | 3083 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3084 | if (!ret) |
3085 | ret = err; | |
3086 | return ret; | |
3087 | } | |
3088 | ||
617ba13b | 3089 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3090 | { |
3091 | int ret, err; | |
3092 | handle_t *handle; | |
3093 | ||
617ba13b MC |
3094 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3095 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3096 | if (IS_ERR(handle)) |
3097 | return PTR_ERR(handle); | |
3098 | ret = dquot_acquire(dquot); | |
617ba13b | 3099 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3100 | if (!ret) |
3101 | ret = err; | |
3102 | return ret; | |
3103 | } | |
3104 | ||
617ba13b | 3105 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3106 | { |
3107 | int ret, err; | |
3108 | handle_t *handle; | |
3109 | ||
617ba13b MC |
3110 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3111 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3112 | if (IS_ERR(handle)) { |
3113 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3114 | dquot_release(dquot); | |
ac27a0ec | 3115 | return PTR_ERR(handle); |
9c3013e9 | 3116 | } |
ac27a0ec | 3117 | ret = dquot_release(dquot); |
617ba13b | 3118 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3119 | if (!ret) |
3120 | ret = err; | |
3121 | return ret; | |
3122 | } | |
3123 | ||
617ba13b | 3124 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec DK |
3125 | { |
3126 | /* Are we journalling quotas? */ | |
617ba13b MC |
3127 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3128 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3129 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3130 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3131 | } else { |
3132 | return dquot_mark_dquot_dirty(dquot); | |
3133 | } | |
3134 | } | |
3135 | ||
617ba13b | 3136 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3137 | { |
3138 | int ret, err; | |
3139 | handle_t *handle; | |
3140 | ||
3141 | /* Data block + inode block */ | |
617ba13b | 3142 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3143 | if (IS_ERR(handle)) |
3144 | return PTR_ERR(handle); | |
3145 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3146 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3147 | if (!ret) |
3148 | ret = err; | |
3149 | return ret; | |
3150 | } | |
3151 | ||
3152 | /* | |
3153 | * Turn on quotas during mount time - we need to find | |
3154 | * the quota file and such... | |
3155 | */ | |
617ba13b | 3156 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3157 | { |
617ba13b MC |
3158 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3159 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3160 | } |
3161 | ||
3162 | /* | |
3163 | * Standard function to be called on quota_on | |
3164 | */ | |
617ba13b | 3165 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
6f28e087 | 3166 | char *path, int remount) |
ac27a0ec DK |
3167 | { |
3168 | int err; | |
3169 | struct nameidata nd; | |
3170 | ||
3171 | if (!test_opt(sb, QUOTA)) | |
3172 | return -EINVAL; | |
3173 | /* Not journalling quota? */ | |
6f28e087 JK |
3174 | if ((!EXT4_SB(sb)->s_qf_names[USRQUOTA] && |
3175 | !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) || remount) | |
3176 | return vfs_quota_on(sb, type, format_id, path, remount); | |
ac27a0ec DK |
3177 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); |
3178 | if (err) | |
3179 | return err; | |
3180 | /* Quotafile not on the same filesystem? */ | |
4ac91378 | 3181 | if (nd.path.mnt->mnt_sb != sb) { |
1d957f9b | 3182 | path_put(&nd.path); |
ac27a0ec DK |
3183 | return -EXDEV; |
3184 | } | |
3185 | /* Quotafile not of fs root? */ | |
4ac91378 | 3186 | if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) |
ac27a0ec | 3187 | printk(KERN_WARNING |
617ba13b | 3188 | "EXT4-fs: Quota file not on filesystem root. " |
ac27a0ec | 3189 | "Journalled quota will not work.\n"); |
1d957f9b | 3190 | path_put(&nd.path); |
6f28e087 | 3191 | return vfs_quota_on(sb, type, format_id, path, remount); |
ac27a0ec DK |
3192 | } |
3193 | ||
3194 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3195 | * acquiring the locks... As quota files are never truncated and quota code | |
3196 | * itself serializes the operations (and noone else should touch the files) | |
3197 | * we don't have to be afraid of races */ | |
617ba13b | 3198 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3199 | size_t len, loff_t off) |
3200 | { | |
3201 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3202 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3203 | int err = 0; |
3204 | int offset = off & (sb->s_blocksize - 1); | |
3205 | int tocopy; | |
3206 | size_t toread; | |
3207 | struct buffer_head *bh; | |
3208 | loff_t i_size = i_size_read(inode); | |
3209 | ||
3210 | if (off > i_size) | |
3211 | return 0; | |
3212 | if (off+len > i_size) | |
3213 | len = i_size-off; | |
3214 | toread = len; | |
3215 | while (toread > 0) { | |
3216 | tocopy = sb->s_blocksize - offset < toread ? | |
3217 | sb->s_blocksize - offset : toread; | |
617ba13b | 3218 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3219 | if (err) |
3220 | return err; | |
3221 | if (!bh) /* A hole? */ | |
3222 | memset(data, 0, tocopy); | |
3223 | else | |
3224 | memcpy(data, bh->b_data+offset, tocopy); | |
3225 | brelse(bh); | |
3226 | offset = 0; | |
3227 | toread -= tocopy; | |
3228 | data += tocopy; | |
3229 | blk++; | |
3230 | } | |
3231 | return len; | |
3232 | } | |
3233 | ||
3234 | /* Write to quotafile (we know the transaction is already started and has | |
3235 | * enough credits) */ | |
617ba13b | 3236 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3237 | const char *data, size_t len, loff_t off) |
3238 | { | |
3239 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3240 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3241 | int err = 0; |
3242 | int offset = off & (sb->s_blocksize - 1); | |
3243 | int tocopy; | |
617ba13b | 3244 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3245 | size_t towrite = len; |
3246 | struct buffer_head *bh; | |
3247 | handle_t *handle = journal_current_handle(); | |
3248 | ||
9c3013e9 JK |
3249 | if (!handle) { |
3250 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" | |
3251 | " cancelled because transaction is not started.\n", | |
3252 | (unsigned long long)off, (unsigned long long)len); | |
3253 | return -EIO; | |
3254 | } | |
ac27a0ec DK |
3255 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3256 | while (towrite > 0) { | |
3257 | tocopy = sb->s_blocksize - offset < towrite ? | |
3258 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3259 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3260 | if (!bh) |
3261 | goto out; | |
3262 | if (journal_quota) { | |
617ba13b | 3263 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3264 | if (err) { |
3265 | brelse(bh); | |
3266 | goto out; | |
3267 | } | |
3268 | } | |
3269 | lock_buffer(bh); | |
3270 | memcpy(bh->b_data+offset, data, tocopy); | |
3271 | flush_dcache_page(bh->b_page); | |
3272 | unlock_buffer(bh); | |
3273 | if (journal_quota) | |
617ba13b | 3274 | err = ext4_journal_dirty_metadata(handle, bh); |
ac27a0ec DK |
3275 | else { |
3276 | /* Always do at least ordered writes for quotas */ | |
617ba13b | 3277 | err = ext4_journal_dirty_data(handle, bh); |
ac27a0ec DK |
3278 | mark_buffer_dirty(bh); |
3279 | } | |
3280 | brelse(bh); | |
3281 | if (err) | |
3282 | goto out; | |
3283 | offset = 0; | |
3284 | towrite -= tocopy; | |
3285 | data += tocopy; | |
3286 | blk++; | |
3287 | } | |
3288 | out: | |
3289 | if (len == towrite) | |
3290 | return err; | |
3291 | if (inode->i_size < off+len-towrite) { | |
3292 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3293 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3294 | } |
ac27a0ec | 3295 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3296 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3297 | mutex_unlock(&inode->i_mutex); |
3298 | return len - towrite; | |
3299 | } | |
3300 | ||
3301 | #endif | |
3302 | ||
617ba13b | 3303 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3304 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3305 | { | |
617ba13b | 3306 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3307 | } |
3308 | ||
617ba13b | 3309 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3310 | .owner = THIS_MODULE, |
617ba13b MC |
3311 | .name = "ext4dev", |
3312 | .get_sb = ext4_get_sb, | |
ac27a0ec DK |
3313 | .kill_sb = kill_block_super, |
3314 | .fs_flags = FS_REQUIRES_DEV, | |
3315 | }; | |
3316 | ||
617ba13b | 3317 | static int __init init_ext4_fs(void) |
ac27a0ec | 3318 | { |
c9de560d AT |
3319 | int err; |
3320 | ||
3321 | err = init_ext4_mballoc(); | |
ac27a0ec DK |
3322 | if (err) |
3323 | return err; | |
c9de560d AT |
3324 | |
3325 | err = init_ext4_xattr(); | |
3326 | if (err) | |
3327 | goto out2; | |
ac27a0ec DK |
3328 | err = init_inodecache(); |
3329 | if (err) | |
3330 | goto out1; | |
63f57933 | 3331 | err = register_filesystem(&ext4dev_fs_type); |
ac27a0ec DK |
3332 | if (err) |
3333 | goto out; | |
3334 | return 0; | |
3335 | out: | |
3336 | destroy_inodecache(); | |
3337 | out1: | |
617ba13b | 3338 | exit_ext4_xattr(); |
c9de560d AT |
3339 | out2: |
3340 | exit_ext4_mballoc(); | |
ac27a0ec DK |
3341 | return err; |
3342 | } | |
3343 | ||
617ba13b | 3344 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3345 | { |
617ba13b | 3346 | unregister_filesystem(&ext4dev_fs_type); |
ac27a0ec | 3347 | destroy_inodecache(); |
617ba13b | 3348 | exit_ext4_xattr(); |
c9de560d | 3349 | exit_ext4_mballoc(); |
ac27a0ec DK |
3350 | } |
3351 | ||
3352 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
617ba13b | 3353 | MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); |
ac27a0ec | 3354 | MODULE_LICENSE("GPL"); |
617ba13b MC |
3355 | module_init(init_ext4_fs) |
3356 | module_exit(exit_ext4_fs) |