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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
dab291af | 23 | #include <linux/jbd2.h> |
617ba13b | 24 | #include <linux/ext4_fs.h> |
dab291af | 25 | #include <linux/ext4_jbd2.h> |
ac27a0ec DK |
26 | #include <linux/slab.h> |
27 | #include <linux/init.h> | |
28 | #include <linux/blkdev.h> | |
29 | #include <linux/parser.h> | |
30 | #include <linux/smp_lock.h> | |
31 | #include <linux/buffer_head.h> | |
a5694255 | 32 | #include <linux/exportfs.h> |
ac27a0ec DK |
33 | #include <linux/vfs.h> |
34 | #include <linux/random.h> | |
35 | #include <linux/mount.h> | |
36 | #include <linux/namei.h> | |
37 | #include <linux/quotaops.h> | |
38 | #include <linux/seq_file.h> | |
1330593e | 39 | #include <linux/log2.h> |
ac27a0ec DK |
40 | |
41 | #include <asm/uaccess.h> | |
42 | ||
43 | #include "xattr.h" | |
44 | #include "acl.h" | |
45 | #include "namei.h" | |
46 | ||
617ba13b | 47 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 48 | unsigned long journal_devnum); |
617ba13b | 49 | static int ext4_create_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 50 | unsigned int); |
617ba13b MC |
51 | static void ext4_commit_super (struct super_block * sb, |
52 | struct ext4_super_block * es, | |
ac27a0ec | 53 | int sync); |
617ba13b MC |
54 | static void ext4_mark_recovery_complete(struct super_block * sb, |
55 | struct ext4_super_block * es); | |
56 | static void ext4_clear_journal_err(struct super_block * sb, | |
57 | struct ext4_super_block * es); | |
58 | static int ext4_sync_fs(struct super_block *sb, int wait); | |
59 | static const char *ext4_decode_error(struct super_block * sb, int errno, | |
ac27a0ec | 60 | char nbuf[16]); |
617ba13b MC |
61 | static int ext4_remount (struct super_block * sb, int * flags, char * data); |
62 | static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); | |
63 | static void ext4_unlockfs(struct super_block *sb); | |
64 | static void ext4_write_super (struct super_block * sb); | |
65 | static void ext4_write_super_lockfs(struct super_block *sb); | |
ac27a0ec | 66 | |
bd81d8ee | 67 | |
8fadc143 AR |
68 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
69 | struct ext4_group_desc *bg) | |
bd81d8ee LV |
70 | { |
71 | return le32_to_cpu(bg->bg_block_bitmap) | | |
8fadc143 AR |
72 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
73 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); | |
bd81d8ee LV |
74 | } |
75 | ||
8fadc143 AR |
76 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
77 | struct ext4_group_desc *bg) | |
bd81d8ee LV |
78 | { |
79 | return le32_to_cpu(bg->bg_inode_bitmap) | | |
8fadc143 AR |
80 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
81 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); | |
bd81d8ee LV |
82 | } |
83 | ||
8fadc143 AR |
84 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
85 | struct ext4_group_desc *bg) | |
bd81d8ee LV |
86 | { |
87 | return le32_to_cpu(bg->bg_inode_table) | | |
8fadc143 AR |
88 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
89 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); | |
bd81d8ee LV |
90 | } |
91 | ||
8fadc143 AR |
92 | void ext4_block_bitmap_set(struct super_block *sb, |
93 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee LV |
94 | { |
95 | bg->bg_block_bitmap = cpu_to_le32((u32)blk); | |
8fadc143 AR |
96 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
97 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
98 | } |
99 | ||
8fadc143 AR |
100 | void ext4_inode_bitmap_set(struct super_block *sb, |
101 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee LV |
102 | { |
103 | bg->bg_inode_bitmap = cpu_to_le32((u32)blk); | |
8fadc143 AR |
104 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
105 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
106 | } |
107 | ||
8fadc143 AR |
108 | void ext4_inode_table_set(struct super_block *sb, |
109 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee LV |
110 | { |
111 | bg->bg_inode_table = cpu_to_le32((u32)blk); | |
8fadc143 AR |
112 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
113 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
114 | } |
115 | ||
ac27a0ec | 116 | /* |
dab291af | 117 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
118 | * |
119 | * The only special thing we need to do here is to make sure that all | |
120 | * journal_end calls result in the superblock being marked dirty, so | |
121 | * that sync() will call the filesystem's write_super callback if | |
122 | * appropriate. | |
123 | */ | |
617ba13b | 124 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
125 | { |
126 | journal_t *journal; | |
127 | ||
128 | if (sb->s_flags & MS_RDONLY) | |
129 | return ERR_PTR(-EROFS); | |
130 | ||
131 | /* Special case here: if the journal has aborted behind our | |
132 | * backs (eg. EIO in the commit thread), then we still need to | |
133 | * take the FS itself readonly cleanly. */ | |
617ba13b | 134 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 135 | if (is_journal_aborted(journal)) { |
617ba13b | 136 | ext4_abort(sb, __FUNCTION__, |
ac27a0ec DK |
137 | "Detected aborted journal"); |
138 | return ERR_PTR(-EROFS); | |
139 | } | |
140 | ||
dab291af | 141 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
142 | } |
143 | ||
144 | /* | |
145 | * The only special thing we need to do here is to make sure that all | |
dab291af | 146 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
147 | * that sync() will call the filesystem's write_super callback if |
148 | * appropriate. | |
149 | */ | |
617ba13b | 150 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
151 | { |
152 | struct super_block *sb; | |
153 | int err; | |
154 | int rc; | |
155 | ||
156 | sb = handle->h_transaction->t_journal->j_private; | |
157 | err = handle->h_err; | |
dab291af | 158 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
159 | |
160 | if (!err) | |
161 | err = rc; | |
162 | if (err) | |
617ba13b | 163 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
164 | return err; |
165 | } | |
166 | ||
617ba13b | 167 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
168 | struct buffer_head *bh, handle_t *handle, int err) |
169 | { | |
170 | char nbuf[16]; | |
617ba13b | 171 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec DK |
172 | |
173 | if (bh) | |
174 | BUFFER_TRACE(bh, "abort"); | |
175 | ||
176 | if (!handle->h_err) | |
177 | handle->h_err = err; | |
178 | ||
179 | if (is_handle_aborted(handle)) | |
180 | return; | |
181 | ||
182 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
183 | caller, errstr, err_fn); | |
184 | ||
dab291af | 185 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
186 | } |
187 | ||
188 | /* Deal with the reporting of failure conditions on a filesystem such as | |
189 | * inconsistencies detected or read IO failures. | |
190 | * | |
191 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 192 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
193 | * write ordering constraints on the superblock which prevent us from |
194 | * writing it out straight away; and given that the journal is about to | |
195 | * be aborted, we can't rely on the current, or future, transactions to | |
196 | * write out the superblock safely. | |
197 | * | |
dab291af | 198 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
199 | * the journal instead. On recovery, the journal will compain about |
200 | * that error until we've noted it down and cleared it. | |
201 | */ | |
202 | ||
617ba13b | 203 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 204 | { |
617ba13b | 205 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 206 | |
617ba13b MC |
207 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
208 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
209 | |
210 | if (sb->s_flags & MS_RDONLY) | |
211 | return; | |
212 | ||
213 | if (!test_opt (sb, ERRORS_CONT)) { | |
617ba13b | 214 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 215 | |
617ba13b | 216 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 217 | if (journal) |
dab291af | 218 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec DK |
219 | } |
220 | if (test_opt (sb, ERRORS_RO)) { | |
221 | printk (KERN_CRIT "Remounting filesystem read-only\n"); | |
222 | sb->s_flags |= MS_RDONLY; | |
223 | } | |
617ba13b | 224 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 225 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 226 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
227 | sb->s_id); |
228 | } | |
229 | ||
617ba13b | 230 | void ext4_error (struct super_block * sb, const char * function, |
ac27a0ec DK |
231 | const char * fmt, ...) |
232 | { | |
233 | va_list args; | |
234 | ||
235 | va_start(args, fmt); | |
617ba13b | 236 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); |
ac27a0ec DK |
237 | vprintk(fmt, args); |
238 | printk("\n"); | |
239 | va_end(args); | |
240 | ||
617ba13b | 241 | ext4_handle_error(sb); |
ac27a0ec DK |
242 | } |
243 | ||
617ba13b | 244 | static const char *ext4_decode_error(struct super_block * sb, int errno, |
ac27a0ec DK |
245 | char nbuf[16]) |
246 | { | |
247 | char *errstr = NULL; | |
248 | ||
249 | switch (errno) { | |
250 | case -EIO: | |
251 | errstr = "IO failure"; | |
252 | break; | |
253 | case -ENOMEM: | |
254 | errstr = "Out of memory"; | |
255 | break; | |
256 | case -EROFS: | |
dab291af | 257 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
258 | errstr = "Journal has aborted"; |
259 | else | |
260 | errstr = "Readonly filesystem"; | |
261 | break; | |
262 | default: | |
263 | /* If the caller passed in an extra buffer for unknown | |
264 | * errors, textualise them now. Else we just return | |
265 | * NULL. */ | |
266 | if (nbuf) { | |
267 | /* Check for truncated error codes... */ | |
268 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
269 | errstr = nbuf; | |
270 | } | |
271 | break; | |
272 | } | |
273 | ||
274 | return errstr; | |
275 | } | |
276 | ||
617ba13b | 277 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
278 | * automatically and invokes the appropriate error response. */ |
279 | ||
617ba13b | 280 | void __ext4_std_error (struct super_block * sb, const char * function, |
ac27a0ec DK |
281 | int errno) |
282 | { | |
283 | char nbuf[16]; | |
284 | const char *errstr; | |
285 | ||
286 | /* Special case: if the error is EROFS, and we're not already | |
287 | * inside a transaction, then there's really no point in logging | |
288 | * an error. */ | |
289 | if (errno == -EROFS && journal_current_handle() == NULL && | |
290 | (sb->s_flags & MS_RDONLY)) | |
291 | return; | |
292 | ||
617ba13b MC |
293 | errstr = ext4_decode_error(sb, errno, nbuf); |
294 | printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", | |
ac27a0ec DK |
295 | sb->s_id, function, errstr); |
296 | ||
617ba13b | 297 | ext4_handle_error(sb); |
ac27a0ec DK |
298 | } |
299 | ||
300 | /* | |
617ba13b | 301 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
302 | * abort function may be used to deal with unrecoverable failures such |
303 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
304 | * | |
305 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
306 | * unless the error response on the fs has been set to panic in which | |
307 | * case we take the easy way out and panic immediately. | |
308 | */ | |
309 | ||
617ba13b | 310 | void ext4_abort (struct super_block * sb, const char * function, |
ac27a0ec DK |
311 | const char * fmt, ...) |
312 | { | |
313 | va_list args; | |
314 | ||
617ba13b | 315 | printk (KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
316 | |
317 | va_start(args, fmt); | |
617ba13b | 318 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); |
ac27a0ec DK |
319 | vprintk(fmt, args); |
320 | printk("\n"); | |
321 | va_end(args); | |
322 | ||
323 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 324 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
325 | |
326 | if (sb->s_flags & MS_RDONLY) | |
327 | return; | |
328 | ||
329 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 330 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 331 | sb->s_flags |= MS_RDONLY; |
617ba13b | 332 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
dab291af | 333 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); |
ac27a0ec DK |
334 | } |
335 | ||
617ba13b | 336 | void ext4_warning (struct super_block * sb, const char * function, |
ac27a0ec DK |
337 | const char * fmt, ...) |
338 | { | |
339 | va_list args; | |
340 | ||
341 | va_start(args, fmt); | |
617ba13b | 342 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
343 | sb->s_id, function); |
344 | vprintk(fmt, args); | |
345 | printk("\n"); | |
346 | va_end(args); | |
347 | } | |
348 | ||
617ba13b | 349 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 350 | { |
617ba13b | 351 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 352 | |
617ba13b | 353 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
354 | return; |
355 | ||
617ba13b | 356 | ext4_warning(sb, __FUNCTION__, |
ac27a0ec DK |
357 | "updating to rev %d because of new feature flag, " |
358 | "running e2fsck is recommended", | |
617ba13b | 359 | EXT4_DYNAMIC_REV); |
ac27a0ec | 360 | |
617ba13b MC |
361 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
362 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
363 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
364 | /* leave es->s_feature_*compat flags alone */ |
365 | /* es->s_uuid will be set by e2fsck if empty */ | |
366 | ||
367 | /* | |
368 | * The rest of the superblock fields should be zero, and if not it | |
369 | * means they are likely already in use, so leave them alone. We | |
370 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
371 | */ | |
372 | } | |
373 | ||
374 | /* | |
375 | * Open the external journal device | |
376 | */ | |
617ba13b | 377 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
378 | { |
379 | struct block_device *bdev; | |
380 | char b[BDEVNAME_SIZE]; | |
381 | ||
382 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
383 | if (IS_ERR(bdev)) | |
384 | goto fail; | |
385 | return bdev; | |
386 | ||
387 | fail: | |
617ba13b | 388 | printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
389 | __bdevname(dev, b), PTR_ERR(bdev)); |
390 | return NULL; | |
391 | } | |
392 | ||
393 | /* | |
394 | * Release the journal device | |
395 | */ | |
617ba13b | 396 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
397 | { |
398 | bd_release(bdev); | |
399 | return blkdev_put(bdev); | |
400 | } | |
401 | ||
617ba13b | 402 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
403 | { |
404 | struct block_device *bdev; | |
405 | int ret = -ENODEV; | |
406 | ||
407 | bdev = sbi->journal_bdev; | |
408 | if (bdev) { | |
617ba13b | 409 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
410 | sbi->journal_bdev = NULL; |
411 | } | |
412 | return ret; | |
413 | } | |
414 | ||
415 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
416 | { | |
617ba13b | 417 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
418 | } |
419 | ||
617ba13b | 420 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
421 | { |
422 | struct list_head *l; | |
423 | ||
424 | printk(KERN_ERR "sb orphan head is %d\n", | |
425 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
426 | ||
427 | printk(KERN_ERR "sb_info orphan list:\n"); | |
428 | list_for_each(l, &sbi->s_orphan) { | |
429 | struct inode *inode = orphan_list_entry(l); | |
430 | printk(KERN_ERR " " | |
431 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
432 | inode->i_sb->s_id, inode->i_ino, inode, | |
433 | inode->i_mode, inode->i_nlink, | |
434 | NEXT_ORPHAN(inode)); | |
435 | } | |
436 | } | |
437 | ||
617ba13b | 438 | static void ext4_put_super (struct super_block * sb) |
ac27a0ec | 439 | { |
617ba13b MC |
440 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
441 | struct ext4_super_block *es = sbi->s_es; | |
ac27a0ec DK |
442 | int i; |
443 | ||
a86c6181 | 444 | ext4_ext_release(sb); |
617ba13b | 445 | ext4_xattr_put_super(sb); |
dab291af | 446 | jbd2_journal_destroy(sbi->s_journal); |
ac27a0ec | 447 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 448 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec DK |
449 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
450 | BUFFER_TRACE(sbi->s_sbh, "marking dirty"); | |
451 | mark_buffer_dirty(sbi->s_sbh); | |
617ba13b | 452 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
453 | } |
454 | ||
455 | for (i = 0; i < sbi->s_gdb_count; i++) | |
456 | brelse(sbi->s_group_desc[i]); | |
457 | kfree(sbi->s_group_desc); | |
458 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
459 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
460 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
461 | brelse(sbi->s_sbh); | |
462 | #ifdef CONFIG_QUOTA | |
463 | for (i = 0; i < MAXQUOTAS; i++) | |
464 | kfree(sbi->s_qf_names[i]); | |
465 | #endif | |
466 | ||
467 | /* Debugging code just in case the in-memory inode orphan list | |
468 | * isn't empty. The on-disk one can be non-empty if we've | |
469 | * detected an error and taken the fs readonly, but the | |
470 | * in-memory list had better be clean by this point. */ | |
471 | if (!list_empty(&sbi->s_orphan)) | |
472 | dump_orphan_list(sb, sbi); | |
473 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
474 | ||
f98393a6 | 475 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
476 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
477 | /* | |
478 | * Invalidate the journal device's buffers. We don't want them | |
479 | * floating about in memory - the physical journal device may | |
480 | * hotswapped, and it breaks the `ro-after' testing code. | |
481 | */ | |
482 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 483 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 484 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
485 | } |
486 | sb->s_fs_info = NULL; | |
487 | kfree(sbi); | |
488 | return; | |
489 | } | |
490 | ||
e18b890b | 491 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
492 | |
493 | /* | |
494 | * Called inside transaction, so use GFP_NOFS | |
495 | */ | |
617ba13b | 496 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 497 | { |
617ba13b | 498 | struct ext4_inode_info *ei; |
ac27a0ec | 499 | |
e6b4f8da | 500 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
501 | if (!ei) |
502 | return NULL; | |
617ba13b MC |
503 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL |
504 | ei->i_acl = EXT4_ACL_NOT_CACHED; | |
505 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
506 | #endif |
507 | ei->i_block_alloc_info = NULL; | |
508 | ei->vfs_inode.i_version = 1; | |
a86c6181 | 509 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
ac27a0ec DK |
510 | return &ei->vfs_inode; |
511 | } | |
512 | ||
617ba13b | 513 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 514 | { |
9f7dd93d VA |
515 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
516 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
517 | EXT4_I(inode)); | |
518 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
519 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
520 | true); | |
521 | dump_stack(); | |
522 | } | |
617ba13b | 523 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
524 | } |
525 | ||
e18b890b | 526 | static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) |
ac27a0ec | 527 | { |
617ba13b | 528 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 529 | |
a35afb83 | 530 | INIT_LIST_HEAD(&ei->i_orphan); |
617ba13b | 531 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
a35afb83 | 532 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 533 | #endif |
a35afb83 CL |
534 | mutex_init(&ei->truncate_mutex); |
535 | inode_init_once(&ei->vfs_inode); | |
ac27a0ec DK |
536 | } |
537 | ||
538 | static int init_inodecache(void) | |
539 | { | |
617ba13b MC |
540 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
541 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
542 | 0, (SLAB_RECLAIM_ACCOUNT| |
543 | SLAB_MEM_SPREAD), | |
20c2df83 | 544 | init_once); |
617ba13b | 545 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
546 | return -ENOMEM; |
547 | return 0; | |
548 | } | |
549 | ||
550 | static void destroy_inodecache(void) | |
551 | { | |
617ba13b | 552 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
553 | } |
554 | ||
617ba13b | 555 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 556 | { |
617ba13b MC |
557 | struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; |
558 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL | |
559 | if (EXT4_I(inode)->i_acl && | |
560 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
561 | posix_acl_release(EXT4_I(inode)->i_acl); | |
562 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
563 | } | |
564 | if (EXT4_I(inode)->i_default_acl && | |
565 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
566 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
567 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
568 | } |
569 | #endif | |
617ba13b MC |
570 | ext4_discard_reservation(inode); |
571 | EXT4_I(inode)->i_block_alloc_info = NULL; | |
ac27a0ec DK |
572 | if (unlikely(rsv)) |
573 | kfree(rsv); | |
574 | } | |
575 | ||
617ba13b | 576 | static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) |
ac27a0ec DK |
577 | { |
578 | #if defined(CONFIG_QUOTA) | |
617ba13b | 579 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
580 | |
581 | if (sbi->s_jquota_fmt) | |
582 | seq_printf(seq, ",jqfmt=%s", | |
583 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); | |
584 | ||
585 | if (sbi->s_qf_names[USRQUOTA]) | |
586 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
587 | ||
588 | if (sbi->s_qf_names[GRPQUOTA]) | |
589 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
590 | ||
617ba13b | 591 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
592 | seq_puts(seq, ",usrquota"); |
593 | ||
617ba13b | 594 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
595 | seq_puts(seq, ",grpquota"); |
596 | #endif | |
597 | } | |
598 | ||
617ba13b | 599 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec DK |
600 | { |
601 | struct super_block *sb = vfs->mnt_sb; | |
602 | ||
617ba13b | 603 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 604 | seq_puts(seq, ",data=journal"); |
617ba13b | 605 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 606 | seq_puts(seq, ",data=ordered"); |
617ba13b | 607 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
608 | seq_puts(seq, ",data=writeback"); |
609 | ||
617ba13b | 610 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
611 | |
612 | return 0; | |
613 | } | |
614 | ||
615 | ||
617ba13b | 616 | static struct dentry *ext4_get_dentry(struct super_block *sb, void *vobjp) |
ac27a0ec DK |
617 | { |
618 | __u32 *objp = vobjp; | |
619 | unsigned long ino = objp[0]; | |
620 | __u32 generation = objp[1]; | |
621 | struct inode *inode; | |
622 | struct dentry *result; | |
623 | ||
617ba13b | 624 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 625 | return ERR_PTR(-ESTALE); |
617ba13b | 626 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
627 | return ERR_PTR(-ESTALE); |
628 | ||
629 | /* iget isn't really right if the inode is currently unallocated!! | |
630 | * | |
617ba13b | 631 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
632 | * deleted, so we should be safe. |
633 | * | |
634 | * Currently we don't know the generation for parent directory, so | |
635 | * a generation of 0 means "accept any" | |
636 | */ | |
637 | inode = iget(sb, ino); | |
638 | if (inode == NULL) | |
639 | return ERR_PTR(-ENOMEM); | |
640 | if (is_bad_inode(inode) || | |
641 | (generation && inode->i_generation != generation)) { | |
642 | iput(inode); | |
643 | return ERR_PTR(-ESTALE); | |
644 | } | |
645 | /* now to find a dentry. | |
646 | * If possible, get a well-connected one | |
647 | */ | |
648 | result = d_alloc_anon(inode); | |
649 | if (!result) { | |
650 | iput(inode); | |
651 | return ERR_PTR(-ENOMEM); | |
652 | } | |
653 | return result; | |
654 | } | |
655 | ||
656 | #ifdef CONFIG_QUOTA | |
657 | #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") | |
658 | #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) | |
659 | ||
617ba13b MC |
660 | static int ext4_dquot_initialize(struct inode *inode, int type); |
661 | static int ext4_dquot_drop(struct inode *inode); | |
662 | static int ext4_write_dquot(struct dquot *dquot); | |
663 | static int ext4_acquire_dquot(struct dquot *dquot); | |
664 | static int ext4_release_dquot(struct dquot *dquot); | |
665 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
666 | static int ext4_write_info(struct super_block *sb, int type); | |
667 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path); | |
668 | static int ext4_quota_on_mount(struct super_block *sb, int type); | |
669 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 670 | size_t len, loff_t off); |
617ba13b | 671 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
672 | const char *data, size_t len, loff_t off); |
673 | ||
617ba13b MC |
674 | static struct dquot_operations ext4_quota_operations = { |
675 | .initialize = ext4_dquot_initialize, | |
676 | .drop = ext4_dquot_drop, | |
ac27a0ec DK |
677 | .alloc_space = dquot_alloc_space, |
678 | .alloc_inode = dquot_alloc_inode, | |
679 | .free_space = dquot_free_space, | |
680 | .free_inode = dquot_free_inode, | |
681 | .transfer = dquot_transfer, | |
617ba13b MC |
682 | .write_dquot = ext4_write_dquot, |
683 | .acquire_dquot = ext4_acquire_dquot, | |
684 | .release_dquot = ext4_release_dquot, | |
685 | .mark_dirty = ext4_mark_dquot_dirty, | |
686 | .write_info = ext4_write_info | |
ac27a0ec DK |
687 | }; |
688 | ||
617ba13b MC |
689 | static struct quotactl_ops ext4_qctl_operations = { |
690 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
691 | .quota_off = vfs_quota_off, |
692 | .quota_sync = vfs_quota_sync, | |
693 | .get_info = vfs_get_dqinfo, | |
694 | .set_info = vfs_set_dqinfo, | |
695 | .get_dqblk = vfs_get_dqblk, | |
696 | .set_dqblk = vfs_set_dqblk | |
697 | }; | |
698 | #endif | |
699 | ||
ee9b6d61 | 700 | static const struct super_operations ext4_sops = { |
617ba13b MC |
701 | .alloc_inode = ext4_alloc_inode, |
702 | .destroy_inode = ext4_destroy_inode, | |
703 | .read_inode = ext4_read_inode, | |
704 | .write_inode = ext4_write_inode, | |
705 | .dirty_inode = ext4_dirty_inode, | |
706 | .delete_inode = ext4_delete_inode, | |
707 | .put_super = ext4_put_super, | |
708 | .write_super = ext4_write_super, | |
709 | .sync_fs = ext4_sync_fs, | |
710 | .write_super_lockfs = ext4_write_super_lockfs, | |
711 | .unlockfs = ext4_unlockfs, | |
712 | .statfs = ext4_statfs, | |
713 | .remount_fs = ext4_remount, | |
714 | .clear_inode = ext4_clear_inode, | |
715 | .show_options = ext4_show_options, | |
ac27a0ec | 716 | #ifdef CONFIG_QUOTA |
617ba13b MC |
717 | .quota_read = ext4_quota_read, |
718 | .quota_write = ext4_quota_write, | |
ac27a0ec DK |
719 | #endif |
720 | }; | |
721 | ||
617ba13b MC |
722 | static struct export_operations ext4_export_ops = { |
723 | .get_parent = ext4_get_parent, | |
724 | .get_dentry = ext4_get_dentry, | |
ac27a0ec DK |
725 | }; |
726 | ||
727 | enum { | |
728 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
729 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
730 | Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, | |
731 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, | |
732 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, | |
733 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, | |
734 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, | |
735 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, | |
736 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
737 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, | |
1e2462f9 | 738 | Opt_grpquota, Opt_extents, Opt_noextents, |
ac27a0ec DK |
739 | }; |
740 | ||
741 | static match_table_t tokens = { | |
742 | {Opt_bsd_df, "bsddf"}, | |
743 | {Opt_minix_df, "minixdf"}, | |
744 | {Opt_grpid, "grpid"}, | |
745 | {Opt_grpid, "bsdgroups"}, | |
746 | {Opt_nogrpid, "nogrpid"}, | |
747 | {Opt_nogrpid, "sysvgroups"}, | |
748 | {Opt_resgid, "resgid=%u"}, | |
749 | {Opt_resuid, "resuid=%u"}, | |
750 | {Opt_sb, "sb=%u"}, | |
751 | {Opt_err_cont, "errors=continue"}, | |
752 | {Opt_err_panic, "errors=panic"}, | |
753 | {Opt_err_ro, "errors=remount-ro"}, | |
754 | {Opt_nouid32, "nouid32"}, | |
755 | {Opt_nocheck, "nocheck"}, | |
756 | {Opt_nocheck, "check=none"}, | |
757 | {Opt_debug, "debug"}, | |
758 | {Opt_oldalloc, "oldalloc"}, | |
759 | {Opt_orlov, "orlov"}, | |
760 | {Opt_user_xattr, "user_xattr"}, | |
761 | {Opt_nouser_xattr, "nouser_xattr"}, | |
762 | {Opt_acl, "acl"}, | |
763 | {Opt_noacl, "noacl"}, | |
764 | {Opt_reservation, "reservation"}, | |
765 | {Opt_noreservation, "noreservation"}, | |
766 | {Opt_noload, "noload"}, | |
767 | {Opt_nobh, "nobh"}, | |
768 | {Opt_bh, "bh"}, | |
769 | {Opt_commit, "commit=%u"}, | |
770 | {Opt_journal_update, "journal=update"}, | |
771 | {Opt_journal_inum, "journal=%u"}, | |
772 | {Opt_journal_dev, "journal_dev=%u"}, | |
773 | {Opt_abort, "abort"}, | |
774 | {Opt_data_journal, "data=journal"}, | |
775 | {Opt_data_ordered, "data=ordered"}, | |
776 | {Opt_data_writeback, "data=writeback"}, | |
777 | {Opt_offusrjquota, "usrjquota="}, | |
778 | {Opt_usrjquota, "usrjquota=%s"}, | |
779 | {Opt_offgrpjquota, "grpjquota="}, | |
780 | {Opt_grpjquota, "grpjquota=%s"}, | |
781 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
782 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
783 | {Opt_grpquota, "grpquota"}, | |
784 | {Opt_noquota, "noquota"}, | |
785 | {Opt_quota, "quota"}, | |
786 | {Opt_usrquota, "usrquota"}, | |
787 | {Opt_barrier, "barrier=%u"}, | |
a86c6181 | 788 | {Opt_extents, "extents"}, |
1e2462f9 | 789 | {Opt_noextents, "noextents"}, |
ac27a0ec DK |
790 | {Opt_err, NULL}, |
791 | {Opt_resize, "resize"}, | |
792 | }; | |
793 | ||
617ba13b | 794 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 795 | { |
617ba13b | 796 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
797 | char *options = (char *) *data; |
798 | ||
799 | if (!options || strncmp(options, "sb=", 3) != 0) | |
800 | return 1; /* Default location */ | |
801 | options += 3; | |
617ba13b | 802 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
803 | sb_block = simple_strtoul(options, &options, 0); |
804 | if (*options && *options != ',') { | |
617ba13b | 805 | printk("EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
806 | (char *) *data); |
807 | return 1; | |
808 | } | |
809 | if (*options == ',') | |
810 | options++; | |
811 | *data = (void *) options; | |
812 | return sb_block; | |
813 | } | |
814 | ||
815 | static int parse_options (char *options, struct super_block *sb, | |
816 | unsigned int *inum, unsigned long *journal_devnum, | |
617ba13b | 817 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 818 | { |
617ba13b | 819 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
820 | char * p; |
821 | substring_t args[MAX_OPT_ARGS]; | |
822 | int data_opt = 0; | |
823 | int option; | |
824 | #ifdef CONFIG_QUOTA | |
825 | int qtype; | |
826 | char *qname; | |
827 | #endif | |
828 | ||
829 | if (!options) | |
830 | return 1; | |
831 | ||
832 | while ((p = strsep (&options, ",")) != NULL) { | |
833 | int token; | |
834 | if (!*p) | |
835 | continue; | |
836 | ||
837 | token = match_token(p, tokens, args); | |
838 | switch (token) { | |
839 | case Opt_bsd_df: | |
840 | clear_opt (sbi->s_mount_opt, MINIX_DF); | |
841 | break; | |
842 | case Opt_minix_df: | |
843 | set_opt (sbi->s_mount_opt, MINIX_DF); | |
844 | break; | |
845 | case Opt_grpid: | |
846 | set_opt (sbi->s_mount_opt, GRPID); | |
847 | break; | |
848 | case Opt_nogrpid: | |
849 | clear_opt (sbi->s_mount_opt, GRPID); | |
850 | break; | |
851 | case Opt_resuid: | |
852 | if (match_int(&args[0], &option)) | |
853 | return 0; | |
854 | sbi->s_resuid = option; | |
855 | break; | |
856 | case Opt_resgid: | |
857 | if (match_int(&args[0], &option)) | |
858 | return 0; | |
859 | sbi->s_resgid = option; | |
860 | break; | |
861 | case Opt_sb: | |
862 | /* handled by get_sb_block() instead of here */ | |
863 | /* *sb_block = match_int(&args[0]); */ | |
864 | break; | |
865 | case Opt_err_panic: | |
866 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
867 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
868 | set_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
869 | break; | |
870 | case Opt_err_ro: | |
871 | clear_opt (sbi->s_mount_opt, ERRORS_CONT); | |
872 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
873 | set_opt (sbi->s_mount_opt, ERRORS_RO); | |
874 | break; | |
875 | case Opt_err_cont: | |
876 | clear_opt (sbi->s_mount_opt, ERRORS_RO); | |
877 | clear_opt (sbi->s_mount_opt, ERRORS_PANIC); | |
878 | set_opt (sbi->s_mount_opt, ERRORS_CONT); | |
879 | break; | |
880 | case Opt_nouid32: | |
881 | set_opt (sbi->s_mount_opt, NO_UID32); | |
882 | break; | |
883 | case Opt_nocheck: | |
884 | clear_opt (sbi->s_mount_opt, CHECK); | |
885 | break; | |
886 | case Opt_debug: | |
887 | set_opt (sbi->s_mount_opt, DEBUG); | |
888 | break; | |
889 | case Opt_oldalloc: | |
890 | set_opt (sbi->s_mount_opt, OLDALLOC); | |
891 | break; | |
892 | case Opt_orlov: | |
893 | clear_opt (sbi->s_mount_opt, OLDALLOC); | |
894 | break; | |
617ba13b | 895 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
ac27a0ec DK |
896 | case Opt_user_xattr: |
897 | set_opt (sbi->s_mount_opt, XATTR_USER); | |
898 | break; | |
899 | case Opt_nouser_xattr: | |
900 | clear_opt (sbi->s_mount_opt, XATTR_USER); | |
901 | break; | |
902 | #else | |
903 | case Opt_user_xattr: | |
904 | case Opt_nouser_xattr: | |
617ba13b | 905 | printk("EXT4 (no)user_xattr options not supported\n"); |
ac27a0ec DK |
906 | break; |
907 | #endif | |
617ba13b | 908 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL |
ac27a0ec DK |
909 | case Opt_acl: |
910 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
911 | break; | |
912 | case Opt_noacl: | |
913 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
914 | break; | |
915 | #else | |
916 | case Opt_acl: | |
917 | case Opt_noacl: | |
617ba13b | 918 | printk("EXT4 (no)acl options not supported\n"); |
ac27a0ec DK |
919 | break; |
920 | #endif | |
921 | case Opt_reservation: | |
922 | set_opt(sbi->s_mount_opt, RESERVATION); | |
923 | break; | |
924 | case Opt_noreservation: | |
925 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
926 | break; | |
927 | case Opt_journal_update: | |
928 | /* @@@ FIXME */ | |
929 | /* Eventually we will want to be able to create | |
930 | a journal file here. For now, only allow the | |
931 | user to specify an existing inode to be the | |
932 | journal file. */ | |
933 | if (is_remount) { | |
617ba13b | 934 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
935 | "journal on remount\n"); |
936 | return 0; | |
937 | } | |
938 | set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); | |
939 | break; | |
940 | case Opt_journal_inum: | |
941 | if (is_remount) { | |
617ba13b | 942 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
943 | "journal on remount\n"); |
944 | return 0; | |
945 | } | |
946 | if (match_int(&args[0], &option)) | |
947 | return 0; | |
948 | *inum = option; | |
949 | break; | |
950 | case Opt_journal_dev: | |
951 | if (is_remount) { | |
617ba13b | 952 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
953 | "journal on remount\n"); |
954 | return 0; | |
955 | } | |
956 | if (match_int(&args[0], &option)) | |
957 | return 0; | |
958 | *journal_devnum = option; | |
959 | break; | |
960 | case Opt_noload: | |
961 | set_opt (sbi->s_mount_opt, NOLOAD); | |
962 | break; | |
963 | case Opt_commit: | |
964 | if (match_int(&args[0], &option)) | |
965 | return 0; | |
966 | if (option < 0) | |
967 | return 0; | |
968 | if (option == 0) | |
969 | option = JBD_DEFAULT_MAX_COMMIT_AGE; | |
970 | sbi->s_commit_interval = HZ * option; | |
971 | break; | |
972 | case Opt_data_journal: | |
617ba13b | 973 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
974 | goto datacheck; |
975 | case Opt_data_ordered: | |
617ba13b | 976 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
977 | goto datacheck; |
978 | case Opt_data_writeback: | |
617ba13b | 979 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
980 | datacheck: |
981 | if (is_remount) { | |
617ba13b | 982 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
983 | != data_opt) { |
984 | printk(KERN_ERR | |
617ba13b | 985 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
986 | "mode on remount\n"); |
987 | return 0; | |
988 | } | |
989 | } else { | |
617ba13b | 990 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
991 | sbi->s_mount_opt |= data_opt; |
992 | } | |
993 | break; | |
994 | #ifdef CONFIG_QUOTA | |
995 | case Opt_usrjquota: | |
996 | qtype = USRQUOTA; | |
997 | goto set_qf_name; | |
998 | case Opt_grpjquota: | |
999 | qtype = GRPQUOTA; | |
1000 | set_qf_name: | |
1001 | if (sb_any_quota_enabled(sb)) { | |
1002 | printk(KERN_ERR | |
617ba13b | 1003 | "EXT4-fs: Cannot change journalled " |
ac27a0ec DK |
1004 | "quota options when quota turned on.\n"); |
1005 | return 0; | |
1006 | } | |
1007 | qname = match_strdup(&args[0]); | |
1008 | if (!qname) { | |
1009 | printk(KERN_ERR | |
617ba13b | 1010 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1011 | "storing quotafile name.\n"); |
1012 | return 0; | |
1013 | } | |
1014 | if (sbi->s_qf_names[qtype] && | |
1015 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1016 | printk(KERN_ERR | |
617ba13b | 1017 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1018 | "specified.\n", QTYPE2NAME(qtype)); |
1019 | kfree(qname); | |
1020 | return 0; | |
1021 | } | |
1022 | sbi->s_qf_names[qtype] = qname; | |
1023 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1024 | printk(KERN_ERR | |
617ba13b | 1025 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1026 | "filesystem root.\n"); |
1027 | kfree(sbi->s_qf_names[qtype]); | |
1028 | sbi->s_qf_names[qtype] = NULL; | |
1029 | return 0; | |
1030 | } | |
1031 | set_opt(sbi->s_mount_opt, QUOTA); | |
1032 | break; | |
1033 | case Opt_offusrjquota: | |
1034 | qtype = USRQUOTA; | |
1035 | goto clear_qf_name; | |
1036 | case Opt_offgrpjquota: | |
1037 | qtype = GRPQUOTA; | |
1038 | clear_qf_name: | |
1039 | if (sb_any_quota_enabled(sb)) { | |
617ba13b | 1040 | printk(KERN_ERR "EXT4-fs: Cannot change " |
ac27a0ec DK |
1041 | "journalled quota options when " |
1042 | "quota turned on.\n"); | |
1043 | return 0; | |
1044 | } | |
1045 | /* | |
1046 | * The space will be released later when all options | |
1047 | * are confirmed to be correct | |
1048 | */ | |
1049 | sbi->s_qf_names[qtype] = NULL; | |
1050 | break; | |
1051 | case Opt_jqfmt_vfsold: | |
1052 | sbi->s_jquota_fmt = QFMT_VFS_OLD; | |
1053 | break; | |
1054 | case Opt_jqfmt_vfsv0: | |
1055 | sbi->s_jquota_fmt = QFMT_VFS_V0; | |
1056 | break; | |
1057 | case Opt_quota: | |
1058 | case Opt_usrquota: | |
1059 | set_opt(sbi->s_mount_opt, QUOTA); | |
1060 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1061 | break; | |
1062 | case Opt_grpquota: | |
1063 | set_opt(sbi->s_mount_opt, QUOTA); | |
1064 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1065 | break; | |
1066 | case Opt_noquota: | |
1067 | if (sb_any_quota_enabled(sb)) { | |
617ba13b | 1068 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1069 | "options when quota turned on.\n"); |
1070 | return 0; | |
1071 | } | |
1072 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1073 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1074 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1075 | break; | |
1076 | #else | |
1077 | case Opt_quota: | |
1078 | case Opt_usrquota: | |
1079 | case Opt_grpquota: | |
1080 | case Opt_usrjquota: | |
1081 | case Opt_grpjquota: | |
1082 | case Opt_offusrjquota: | |
1083 | case Opt_offgrpjquota: | |
1084 | case Opt_jqfmt_vfsold: | |
1085 | case Opt_jqfmt_vfsv0: | |
1086 | printk(KERN_ERR | |
617ba13b | 1087 | "EXT4-fs: journalled quota options not " |
ac27a0ec DK |
1088 | "supported.\n"); |
1089 | break; | |
1090 | case Opt_noquota: | |
1091 | break; | |
1092 | #endif | |
1093 | case Opt_abort: | |
1094 | set_opt(sbi->s_mount_opt, ABORT); | |
1095 | break; | |
1096 | case Opt_barrier: | |
1097 | if (match_int(&args[0], &option)) | |
1098 | return 0; | |
1099 | if (option) | |
1100 | set_opt(sbi->s_mount_opt, BARRIER); | |
1101 | else | |
1102 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1103 | break; | |
1104 | case Opt_ignore: | |
1105 | break; | |
1106 | case Opt_resize: | |
1107 | if (!is_remount) { | |
617ba13b | 1108 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1109 | "for remount\n"); |
1110 | return 0; | |
1111 | } | |
1112 | if (match_int(&args[0], &option) != 0) | |
1113 | return 0; | |
1114 | *n_blocks_count = option; | |
1115 | break; | |
1116 | case Opt_nobh: | |
1117 | set_opt(sbi->s_mount_opt, NOBH); | |
1118 | break; | |
1119 | case Opt_bh: | |
1120 | clear_opt(sbi->s_mount_opt, NOBH); | |
1121 | break; | |
a86c6181 AT |
1122 | case Opt_extents: |
1123 | set_opt (sbi->s_mount_opt, EXTENTS); | |
1124 | break; | |
1e2462f9 MC |
1125 | case Opt_noextents: |
1126 | clear_opt (sbi->s_mount_opt, EXTENTS); | |
1127 | break; | |
ac27a0ec DK |
1128 | default: |
1129 | printk (KERN_ERR | |
617ba13b | 1130 | "EXT4-fs: Unrecognized mount option \"%s\" " |
ac27a0ec DK |
1131 | "or missing value\n", p); |
1132 | return 0; | |
1133 | } | |
1134 | } | |
1135 | #ifdef CONFIG_QUOTA | |
1136 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1137 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1138 | sbi->s_qf_names[USRQUOTA]) |
1139 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1140 | ||
617ba13b | 1141 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1142 | sbi->s_qf_names[GRPQUOTA]) |
1143 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1144 | ||
1145 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1146 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1147 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1148 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1149 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1150 | "format mixing.\n"); |
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | if (!sbi->s_jquota_fmt) { | |
617ba13b | 1155 | printk(KERN_ERR "EXT4-fs: journalled quota format " |
ac27a0ec DK |
1156 | "not specified.\n"); |
1157 | return 0; | |
1158 | } | |
1159 | } else { | |
1160 | if (sbi->s_jquota_fmt) { | |
617ba13b | 1161 | printk(KERN_ERR "EXT4-fs: journalled quota format " |
ac27a0ec DK |
1162 | "specified with no journalling " |
1163 | "enabled.\n"); | |
1164 | return 0; | |
1165 | } | |
1166 | } | |
1167 | #endif | |
1168 | return 1; | |
1169 | } | |
1170 | ||
617ba13b | 1171 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1172 | int read_only) |
1173 | { | |
617ba13b | 1174 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1175 | int res = 0; |
1176 | ||
617ba13b MC |
1177 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
1178 | printk (KERN_ERR "EXT4-fs warning: revision level too high, " | |
ac27a0ec DK |
1179 | "forcing read-only mode\n"); |
1180 | res = MS_RDONLY; | |
1181 | } | |
1182 | if (read_only) | |
1183 | return res; | |
617ba13b MC |
1184 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
1185 | printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " | |
ac27a0ec | 1186 | "running e2fsck is recommended\n"); |
617ba13b | 1187 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
ac27a0ec | 1188 | printk (KERN_WARNING |
617ba13b | 1189 | "EXT4-fs warning: mounting fs with errors, " |
ac27a0ec DK |
1190 | "running e2fsck is recommended\n"); |
1191 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && | |
1192 | le16_to_cpu(es->s_mnt_count) >= | |
1193 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
1194 | printk (KERN_WARNING | |
617ba13b | 1195 | "EXT4-fs warning: maximal mount count reached, " |
ac27a0ec DK |
1196 | "running e2fsck is recommended\n"); |
1197 | else if (le32_to_cpu(es->s_checkinterval) && | |
1198 | (le32_to_cpu(es->s_lastcheck) + | |
1199 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
1200 | printk (KERN_WARNING | |
617ba13b | 1201 | "EXT4-fs warning: checktime reached, " |
ac27a0ec DK |
1202 | "running e2fsck is recommended\n"); |
1203 | #if 0 | |
1204 | /* @@@ We _will_ want to clear the valid bit if we find | |
63f57933 AM |
1205 | * inconsistencies, to force a fsck at reboot. But for |
1206 | * a plain journaled filesystem we can keep it set as | |
1207 | * valid forever! :) | |
1208 | */ | |
617ba13b | 1209 | es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT4_VALID_FS); |
ac27a0ec DK |
1210 | #endif |
1211 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
617ba13b | 1212 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
ac27a0ec DK |
1213 | es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); |
1214 | es->s_mtime = cpu_to_le32(get_seconds()); | |
617ba13b MC |
1215 | ext4_update_dynamic_rev(sb); |
1216 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1217 | |
617ba13b | 1218 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1219 | if (test_opt(sb, DEBUG)) |
617ba13b | 1220 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " |
ac27a0ec DK |
1221 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1222 | sb->s_blocksize, | |
1223 | sbi->s_groups_count, | |
617ba13b MC |
1224 | EXT4_BLOCKS_PER_GROUP(sb), |
1225 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1226 | sbi->s_mount_opt); |
1227 | ||
617ba13b MC |
1228 | printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); |
1229 | if (EXT4_SB(sb)->s_journal->j_inode == NULL) { | |
ac27a0ec DK |
1230 | char b[BDEVNAME_SIZE]; |
1231 | ||
1232 | printk("external journal on %s\n", | |
617ba13b | 1233 | bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); |
ac27a0ec DK |
1234 | } else { |
1235 | printk("internal journal\n"); | |
1236 | } | |
1237 | return res; | |
1238 | } | |
1239 | ||
1240 | /* Called at mount-time, super-block is locked */ | |
617ba13b | 1241 | static int ext4_check_descriptors (struct super_block * sb) |
ac27a0ec | 1242 | { |
617ba13b MC |
1243 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1244 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1245 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1246 | ext4_fsblk_t block_bitmap; |
1247 | ext4_fsblk_t inode_bitmap; | |
1248 | ext4_fsblk_t inode_table; | |
617ba13b | 1249 | struct ext4_group_desc * gdp = NULL; |
ac27a0ec DK |
1250 | int desc_block = 0; |
1251 | int i; | |
1252 | ||
617ba13b | 1253 | ext4_debug ("Checking group descriptors"); |
ac27a0ec DK |
1254 | |
1255 | for (i = 0; i < sbi->s_groups_count; i++) | |
1256 | { | |
1257 | if (i == sbi->s_groups_count - 1) | |
bd81d8ee | 1258 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1259 | else |
1260 | last_block = first_block + | |
617ba13b | 1261 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1262 | |
617ba13b MC |
1263 | if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0) |
1264 | gdp = (struct ext4_group_desc *) | |
ac27a0ec | 1265 | sbi->s_group_desc[desc_block++]->b_data; |
8fadc143 | 1266 | block_bitmap = ext4_block_bitmap(sb, gdp); |
bd81d8ee | 1267 | if (block_bitmap < first_block || block_bitmap > last_block) |
ac27a0ec | 1268 | { |
617ba13b | 1269 | ext4_error (sb, "ext4_check_descriptors", |
ac27a0ec | 1270 | "Block bitmap for group %d" |
2ae02107 | 1271 | " not in group (block %llu)!", |
bd81d8ee | 1272 | i, block_bitmap); |
ac27a0ec DK |
1273 | return 0; |
1274 | } | |
8fadc143 | 1275 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
bd81d8ee | 1276 | if (inode_bitmap < first_block || inode_bitmap > last_block) |
ac27a0ec | 1277 | { |
617ba13b | 1278 | ext4_error (sb, "ext4_check_descriptors", |
ac27a0ec | 1279 | "Inode bitmap for group %d" |
2ae02107 | 1280 | " not in group (block %llu)!", |
bd81d8ee | 1281 | i, inode_bitmap); |
ac27a0ec DK |
1282 | return 0; |
1283 | } | |
8fadc143 | 1284 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1285 | if (inode_table < first_block || |
780dcdb2 | 1286 | inode_table + sbi->s_itb_per_group - 1 > last_block) |
ac27a0ec | 1287 | { |
617ba13b | 1288 | ext4_error (sb, "ext4_check_descriptors", |
ac27a0ec | 1289 | "Inode table for group %d" |
2ae02107 | 1290 | " not in group (block %llu)!", |
bd81d8ee | 1291 | i, inode_table); |
ac27a0ec DK |
1292 | return 0; |
1293 | } | |
617ba13b | 1294 | first_block += EXT4_BLOCKS_PER_GROUP(sb); |
0d1ee42f AR |
1295 | gdp = (struct ext4_group_desc *) |
1296 | ((__u8 *)gdp + EXT4_DESC_SIZE(sb)); | |
ac27a0ec DK |
1297 | } |
1298 | ||
bd81d8ee | 1299 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
617ba13b | 1300 | sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1301 | return 1; |
1302 | } | |
1303 | ||
1304 | ||
617ba13b | 1305 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1306 | * the superblock) which were deleted from all directories, but held open by |
1307 | * a process at the time of a crash. We walk the list and try to delete these | |
1308 | * inodes at recovery time (only with a read-write filesystem). | |
1309 | * | |
1310 | * In order to keep the orphan inode chain consistent during traversal (in | |
1311 | * case of crash during recovery), we link each inode into the superblock | |
1312 | * orphan list_head and handle it the same way as an inode deletion during | |
1313 | * normal operation (which journals the operations for us). | |
1314 | * | |
1315 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1316 | * accidentally point at an in-use or already deleted inode. The worst that | |
1317 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1318 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1319 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1320 | * inode cleanup for us, so we can safely abort without any further action. | |
1321 | */ | |
617ba13b MC |
1322 | static void ext4_orphan_cleanup (struct super_block * sb, |
1323 | struct ext4_super_block * es) | |
ac27a0ec DK |
1324 | { |
1325 | unsigned int s_flags = sb->s_flags; | |
1326 | int nr_orphans = 0, nr_truncates = 0; | |
1327 | #ifdef CONFIG_QUOTA | |
1328 | int i; | |
1329 | #endif | |
1330 | if (!es->s_last_orphan) { | |
1331 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1332 | return; | |
1333 | } | |
1334 | ||
a8f48a95 ES |
1335 | if (bdev_read_only(sb->s_bdev)) { |
1336 | printk(KERN_ERR "EXT4-fs: write access " | |
1337 | "unavailable, skipping orphan cleanup.\n"); | |
1338 | return; | |
1339 | } | |
1340 | ||
617ba13b | 1341 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1342 | if (es->s_last_orphan) |
1343 | jbd_debug(1, "Errors on filesystem, " | |
1344 | "clearing orphan list.\n"); | |
1345 | es->s_last_orphan = 0; | |
1346 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1347 | return; | |
1348 | } | |
1349 | ||
1350 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1351 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1352 | sb->s_id); |
1353 | sb->s_flags &= ~MS_RDONLY; | |
1354 | } | |
1355 | #ifdef CONFIG_QUOTA | |
1356 | /* Needed for iput() to work correctly and not trash data */ | |
1357 | sb->s_flags |= MS_ACTIVE; | |
1358 | /* Turn on quotas so that they are updated correctly */ | |
1359 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1360 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1361 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1362 | if (ret < 0) |
1363 | printk(KERN_ERR | |
617ba13b | 1364 | "EXT4-fs: Cannot turn on journalled " |
ac27a0ec DK |
1365 | "quota: error %d\n", ret); |
1366 | } | |
1367 | } | |
1368 | #endif | |
1369 | ||
1370 | while (es->s_last_orphan) { | |
1371 | struct inode *inode; | |
1372 | ||
1373 | if (!(inode = | |
617ba13b | 1374 | ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { |
ac27a0ec DK |
1375 | es->s_last_orphan = 0; |
1376 | break; | |
1377 | } | |
1378 | ||
617ba13b | 1379 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
ac27a0ec DK |
1380 | DQUOT_INIT(inode); |
1381 | if (inode->i_nlink) { | |
1382 | printk(KERN_DEBUG | |
1383 | "%s: truncating inode %lu to %Ld bytes\n", | |
1384 | __FUNCTION__, inode->i_ino, inode->i_size); | |
1385 | jbd_debug(2, "truncating inode %lu to %Ld bytes\n", | |
1386 | inode->i_ino, inode->i_size); | |
617ba13b | 1387 | ext4_truncate(inode); |
ac27a0ec DK |
1388 | nr_truncates++; |
1389 | } else { | |
1390 | printk(KERN_DEBUG | |
1391 | "%s: deleting unreferenced inode %lu\n", | |
1392 | __FUNCTION__, inode->i_ino); | |
1393 | jbd_debug(2, "deleting unreferenced inode %lu\n", | |
1394 | inode->i_ino); | |
1395 | nr_orphans++; | |
1396 | } | |
1397 | iput(inode); /* The delete magic happens here! */ | |
1398 | } | |
1399 | ||
1400 | #define PLURAL(x) (x), ((x)==1) ? "" : "s" | |
1401 | ||
1402 | if (nr_orphans) | |
617ba13b | 1403 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1404 | sb->s_id, PLURAL(nr_orphans)); |
1405 | if (nr_truncates) | |
617ba13b | 1406 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1407 | sb->s_id, PLURAL(nr_truncates)); |
1408 | #ifdef CONFIG_QUOTA | |
1409 | /* Turn quotas off */ | |
1410 | for (i = 0; i < MAXQUOTAS; i++) { | |
1411 | if (sb_dqopt(sb)->files[i]) | |
1412 | vfs_quota_off(sb, i); | |
1413 | } | |
1414 | #endif | |
1415 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1416 | } | |
1417 | ||
1418 | #define log2(n) ffz(~(n)) | |
1419 | ||
1420 | /* | |
1421 | * Maximal file size. There is a direct, and {,double-,triple-}indirect | |
1422 | * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. | |
1423 | * We need to be 1 filesystem block less than the 2^32 sector limit. | |
1424 | */ | |
617ba13b | 1425 | static loff_t ext4_max_size(int bits) |
ac27a0ec | 1426 | { |
617ba13b | 1427 | loff_t res = EXT4_NDIR_BLOCKS; |
ac27a0ec DK |
1428 | /* This constant is calculated to be the largest file size for a |
1429 | * dense, 4k-blocksize file such that the total number of | |
1430 | * sectors in the file, including data and all indirect blocks, | |
1431 | * does not exceed 2^32. */ | |
1432 | const loff_t upper_limit = 0x1ff7fffd000LL; | |
1433 | ||
1434 | res += 1LL << (bits-2); | |
1435 | res += 1LL << (2*(bits-2)); | |
1436 | res += 1LL << (3*(bits-2)); | |
1437 | res <<= bits; | |
1438 | if (res > upper_limit) | |
1439 | res = upper_limit; | |
1440 | return res; | |
1441 | } | |
1442 | ||
617ba13b | 1443 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1444 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1445 | { |
617ba13b | 1446 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1447 | unsigned long bg, first_meta_bg; |
1448 | int has_super = 0; | |
1449 | ||
1450 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
1451 | ||
617ba13b | 1452 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 1453 | nr < first_meta_bg) |
70bbb3e0 | 1454 | return logical_sb_block + nr + 1; |
ac27a0ec | 1455 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 1456 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 1457 | has_super = 1; |
617ba13b | 1458 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
1459 | } |
1460 | ||
1461 | ||
617ba13b | 1462 | static int ext4_fill_super (struct super_block *sb, void *data, int silent) |
ac27a0ec DK |
1463 | { |
1464 | struct buffer_head * bh; | |
617ba13b MC |
1465 | struct ext4_super_block *es = NULL; |
1466 | struct ext4_sb_info *sbi; | |
1467 | ext4_fsblk_t block; | |
1468 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 1469 | ext4_fsblk_t logical_sb_block; |
ac27a0ec DK |
1470 | unsigned long offset = 0; |
1471 | unsigned int journal_inum = 0; | |
1472 | unsigned long journal_devnum = 0; | |
1473 | unsigned long def_mount_opts; | |
1474 | struct inode *root; | |
1475 | int blocksize; | |
1476 | int hblock; | |
1477 | int db_count; | |
1478 | int i; | |
1479 | int needs_recovery; | |
1480 | __le32 features; | |
bd81d8ee | 1481 | __u64 blocks_count; |
ac27a0ec DK |
1482 | |
1483 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
1484 | if (!sbi) | |
1485 | return -ENOMEM; | |
1486 | sb->s_fs_info = sbi; | |
1487 | sbi->s_mount_opt = 0; | |
617ba13b MC |
1488 | sbi->s_resuid = EXT4_DEF_RESUID; |
1489 | sbi->s_resgid = EXT4_DEF_RESGID; | |
ac27a0ec DK |
1490 | |
1491 | unlock_kernel(); | |
1492 | ||
617ba13b | 1493 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 1494 | if (!blocksize) { |
617ba13b | 1495 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
1496 | goto out_fail; |
1497 | } | |
1498 | ||
1499 | /* | |
617ba13b | 1500 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
1501 | * block sizes. We need to calculate the offset from buffer start. |
1502 | */ | |
617ba13b | 1503 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
1504 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
1505 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 1506 | } else { |
70bbb3e0 | 1507 | logical_sb_block = sb_block; |
ac27a0ec DK |
1508 | } |
1509 | ||
70bbb3e0 | 1510 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
617ba13b | 1511 | printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
1512 | goto out_fail; |
1513 | } | |
1514 | /* | |
1515 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 1516 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 1517 | */ |
617ba13b | 1518 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
1519 | sbi->s_es = es; |
1520 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
1521 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
1522 | goto cantfind_ext4; | |
ac27a0ec DK |
1523 | |
1524 | /* Set defaults before we parse the mount options */ | |
1525 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 1526 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 1527 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 1528 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 1529 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 1530 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 1531 | set_opt(sbi->s_mount_opt, NO_UID32); |
2e7842b8 | 1532 | #ifdef CONFIG_EXT4DEV_FS_XATTR |
617ba13b | 1533 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 1534 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 HD |
1535 | #endif |
1536 | #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL | |
617ba13b | 1537 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 1538 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 1539 | #endif |
617ba13b MC |
1540 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
1541 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
1542 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
1543 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
1544 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
1545 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
1546 | ||
1547 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 1548 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
617ba13b | 1549 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_RO) |
ac27a0ec | 1550 | set_opt(sbi->s_mount_opt, ERRORS_RO); |
ceea16bf DM |
1551 | else |
1552 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1553 | |
1554 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1555 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1556 | ||
1557 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1558 | ||
1e2462f9 MC |
1559 | /* |
1560 | * turn on extents feature by default in ext4 filesystem | |
1561 | * User -o noextents to turn it off | |
1562 | */ | |
1563 | set_opt(sbi->s_mount_opt, EXTENTS); | |
1564 | ||
ac27a0ec DK |
1565 | if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, |
1566 | NULL, 0)) | |
1567 | goto failed_mount; | |
1568 | ||
1569 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 1570 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 1571 | |
617ba13b MC |
1572 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
1573 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1574 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1575 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 1576 | printk(KERN_WARNING |
617ba13b | 1577 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec DK |
1578 | "running e2fsck is recommended\n"); |
1579 | /* | |
1580 | * Check feature flags regardless of the revision level, since we | |
1581 | * previously didn't change the revision level when setting the flags, | |
1582 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
1583 | */ | |
617ba13b | 1584 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 1585 | if (features) { |
617ba13b | 1586 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
ac27a0ec DK |
1587 | "unsupported optional features (%x).\n", |
1588 | sb->s_id, le32_to_cpu(features)); | |
1589 | goto failed_mount; | |
1590 | } | |
617ba13b | 1591 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 1592 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 1593 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
ac27a0ec DK |
1594 | "unsupported optional features (%x).\n", |
1595 | sb->s_id, le32_to_cpu(features)); | |
1596 | goto failed_mount; | |
1597 | } | |
1598 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
1599 | ||
617ba13b MC |
1600 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
1601 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 1602 | printk(KERN_ERR |
617ba13b | 1603 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
1604 | blocksize, sb->s_id); |
1605 | goto failed_mount; | |
1606 | } | |
1607 | ||
1608 | hblock = bdev_hardsect_size(sb->s_bdev); | |
1609 | if (sb->s_blocksize != blocksize) { | |
1610 | /* | |
1611 | * Make sure the blocksize for the filesystem is larger | |
1612 | * than the hardware sectorsize for the machine. | |
1613 | */ | |
1614 | if (blocksize < hblock) { | |
617ba13b | 1615 | printk(KERN_ERR "EXT4-fs: blocksize %d too small for " |
ac27a0ec DK |
1616 | "device blocksize %d.\n", blocksize, hblock); |
1617 | goto failed_mount; | |
1618 | } | |
1619 | ||
1620 | brelse (bh); | |
1621 | sb_set_blocksize(sb, blocksize); | |
70bbb3e0 AM |
1622 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
1623 | offset = do_div(logical_sb_block, blocksize); | |
1624 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
1625 | if (!bh) { |
1626 | printk(KERN_ERR | |
617ba13b | 1627 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
1628 | goto failed_mount; |
1629 | } | |
617ba13b | 1630 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 1631 | sbi->s_es = es; |
617ba13b | 1632 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
ac27a0ec | 1633 | printk (KERN_ERR |
617ba13b | 1634 | "EXT4-fs: Magic mismatch, very weird !\n"); |
ac27a0ec DK |
1635 | goto failed_mount; |
1636 | } | |
1637 | } | |
1638 | ||
617ba13b | 1639 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); |
ac27a0ec | 1640 | |
617ba13b MC |
1641 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
1642 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
1643 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
1644 | } else { |
1645 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
1646 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 1647 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 1648 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec DK |
1649 | (sbi->s_inode_size > blocksize)) { |
1650 | printk (KERN_ERR | |
617ba13b | 1651 | "EXT4-fs: unsupported inode size: %d\n", |
ac27a0ec DK |
1652 | sbi->s_inode_size); |
1653 | goto failed_mount; | |
1654 | } | |
ef7f3835 KS |
1655 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
1656 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 1657 | } |
617ba13b | 1658 | sbi->s_frag_size = EXT4_MIN_FRAG_SIZE << |
ac27a0ec DK |
1659 | le32_to_cpu(es->s_log_frag_size); |
1660 | if (blocksize != sbi->s_frag_size) { | |
1661 | printk(KERN_ERR | |
617ba13b | 1662 | "EXT4-fs: fragsize %lu != blocksize %u (unsupported)\n", |
ac27a0ec DK |
1663 | sbi->s_frag_size, blocksize); |
1664 | goto failed_mount; | |
1665 | } | |
0d1ee42f AR |
1666 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
1667 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 1668 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f AR |
1669 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
1670 | sbi->s_desc_size & (sbi->s_desc_size - 1)) { | |
1671 | printk(KERN_ERR | |
8fadc143 | 1672 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
1673 | sbi->s_desc_size); |
1674 | goto failed_mount; | |
1675 | } | |
1676 | } else | |
1677 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec DK |
1678 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
1679 | sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); | |
1680 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
617ba13b MC |
1681 | if (EXT4_INODE_SIZE(sb) == 0) |
1682 | goto cantfind_ext4; | |
1683 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 1684 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 1685 | goto cantfind_ext4; |
ac27a0ec DK |
1686 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
1687 | sbi->s_inodes_per_block; | |
0d1ee42f | 1688 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
1689 | sbi->s_sbh = bh; |
1690 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
617ba13b MC |
1691 | sbi->s_addr_per_block_bits = log2(EXT4_ADDR_PER_BLOCK(sb)); |
1692 | sbi->s_desc_per_block_bits = log2(EXT4_DESC_PER_BLOCK(sb)); | |
ac27a0ec DK |
1693 | for (i=0; i < 4; i++) |
1694 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
1695 | sbi->s_def_hash_version = es->s_def_hash_version; | |
1696 | ||
1697 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
1698 | printk (KERN_ERR | |
617ba13b | 1699 | "EXT4-fs: #blocks per group too big: %lu\n", |
ac27a0ec DK |
1700 | sbi->s_blocks_per_group); |
1701 | goto failed_mount; | |
1702 | } | |
1703 | if (sbi->s_frags_per_group > blocksize * 8) { | |
1704 | printk (KERN_ERR | |
617ba13b | 1705 | "EXT4-fs: #fragments per group too big: %lu\n", |
ac27a0ec DK |
1706 | sbi->s_frags_per_group); |
1707 | goto failed_mount; | |
1708 | } | |
1709 | if (sbi->s_inodes_per_group > blocksize * 8) { | |
1710 | printk (KERN_ERR | |
617ba13b | 1711 | "EXT4-fs: #inodes per group too big: %lu\n", |
ac27a0ec DK |
1712 | sbi->s_inodes_per_group); |
1713 | goto failed_mount; | |
1714 | } | |
1715 | ||
bd81d8ee | 1716 | if (ext4_blocks_count(es) > |
ac27a0ec | 1717 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 1718 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
1719 | " too large to mount safely\n", sb->s_id); |
1720 | if (sizeof(sector_t) < 8) | |
617ba13b | 1721 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
1722 | "enabled\n"); |
1723 | goto failed_mount; | |
1724 | } | |
1725 | ||
617ba13b MC |
1726 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
1727 | goto cantfind_ext4; | |
bd81d8ee LV |
1728 | blocks_count = (ext4_blocks_count(es) - |
1729 | le32_to_cpu(es->s_first_data_block) + | |
1730 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
1731 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
1732 | sbi->s_groups_count = blocks_count; | |
617ba13b MC |
1733 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
1734 | EXT4_DESC_PER_BLOCK(sb); | |
ac27a0ec DK |
1735 | sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), |
1736 | GFP_KERNEL); | |
1737 | if (sbi->s_group_desc == NULL) { | |
617ba13b | 1738 | printk (KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
1739 | goto failed_mount; |
1740 | } | |
1741 | ||
1742 | bgl_lock_init(&sbi->s_blockgroup_lock); | |
1743 | ||
1744 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 1745 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
1746 | sbi->s_group_desc[i] = sb_bread(sb, block); |
1747 | if (!sbi->s_group_desc[i]) { | |
617ba13b | 1748 | printk (KERN_ERR "EXT4-fs: " |
ac27a0ec DK |
1749 | "can't read group descriptor %d\n", i); |
1750 | db_count = i; | |
1751 | goto failed_mount2; | |
1752 | } | |
1753 | } | |
617ba13b MC |
1754 | if (!ext4_check_descriptors (sb)) { |
1755 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); | |
ac27a0ec DK |
1756 | goto failed_mount2; |
1757 | } | |
1758 | sbi->s_gdb_count = db_count; | |
1759 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1760 | spin_lock_init(&sbi->s_next_gen_lock); | |
1761 | ||
1762 | percpu_counter_init(&sbi->s_freeblocks_counter, | |
617ba13b | 1763 | ext4_count_free_blocks(sb)); |
ac27a0ec | 1764 | percpu_counter_init(&sbi->s_freeinodes_counter, |
617ba13b | 1765 | ext4_count_free_inodes(sb)); |
ac27a0ec | 1766 | percpu_counter_init(&sbi->s_dirs_counter, |
617ba13b | 1767 | ext4_count_dirs(sb)); |
ac27a0ec DK |
1768 | |
1769 | /* per fileystem reservation list head & lock */ | |
1770 | spin_lock_init(&sbi->s_rsv_window_lock); | |
1771 | sbi->s_rsv_window_root = RB_ROOT; | |
1772 | /* Add a single, static dummy reservation to the start of the | |
1773 | * reservation window list --- it gives us a placeholder for | |
1774 | * append-at-start-of-list which makes the allocation logic | |
1775 | * _much_ simpler. */ | |
617ba13b MC |
1776 | sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; |
1777 | sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; | |
ac27a0ec DK |
1778 | sbi->s_rsv_window_head.rsv_alloc_hit = 0; |
1779 | sbi->s_rsv_window_head.rsv_goal_size = 0; | |
617ba13b | 1780 | ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); |
ac27a0ec DK |
1781 | |
1782 | /* | |
1783 | * set up enough so that it can read an inode | |
1784 | */ | |
617ba13b MC |
1785 | sb->s_op = &ext4_sops; |
1786 | sb->s_export_op = &ext4_export_ops; | |
1787 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 1788 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1789 | sb->s_qcop = &ext4_qctl_operations; |
1790 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
1791 | #endif |
1792 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
1793 | ||
1794 | sb->s_root = NULL; | |
1795 | ||
1796 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
1797 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
1798 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
1799 | |
1800 | /* | |
1801 | * The first inode we look at is the journal inode. Don't try | |
1802 | * root first: it may be modified in the journal! | |
1803 | */ | |
1804 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
1805 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
1806 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec DK |
1807 | goto failed_mount3; |
1808 | } else if (journal_inum) { | |
617ba13b | 1809 | if (ext4_create_journal(sb, es, journal_inum)) |
ac27a0ec DK |
1810 | goto failed_mount3; |
1811 | } else { | |
1812 | if (!silent) | |
1813 | printk (KERN_ERR | |
617ba13b | 1814 | "ext4: No journal on filesystem on %s\n", |
ac27a0ec DK |
1815 | sb->s_id); |
1816 | goto failed_mount3; | |
1817 | } | |
1818 | ||
eb40a09c JS |
1819 | if (ext4_blocks_count(es) > 0xffffffffULL && |
1820 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
1821 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
1822 | printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); | |
1823 | goto failed_mount4; | |
1824 | } | |
1825 | ||
ac27a0ec DK |
1826 | /* We have now updated the journal if required, so we can |
1827 | * validate the data journaling mode. */ | |
1828 | switch (test_opt(sb, DATA_FLAGS)) { | |
1829 | case 0: | |
1830 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
1831 | * capabilities: ORDERED_DATA if the journal can |
1832 | * cope, else JOURNAL_DATA | |
1833 | */ | |
dab291af MC |
1834 | if (jbd2_journal_check_available_features |
1835 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
1836 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
1837 | else | |
1838 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
1839 | break; | |
1840 | ||
617ba13b MC |
1841 | case EXT4_MOUNT_ORDERED_DATA: |
1842 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
1843 | if (!jbd2_journal_check_available_features |
1844 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 1845 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
1846 | "requested data journaling mode\n"); |
1847 | goto failed_mount4; | |
1848 | } | |
1849 | default: | |
1850 | break; | |
1851 | } | |
1852 | ||
1853 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
1854 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
1855 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
1856 | "its supported only with writeback mode\n"); |
1857 | clear_opt(sbi->s_mount_opt, NOBH); | |
1858 | } | |
1859 | } | |
1860 | /* | |
dab291af | 1861 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
1862 | * so we can safely mount the rest of the filesystem now. |
1863 | */ | |
1864 | ||
617ba13b | 1865 | root = iget(sb, EXT4_ROOT_INO); |
ac27a0ec DK |
1866 | sb->s_root = d_alloc_root(root); |
1867 | if (!sb->s_root) { | |
617ba13b | 1868 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
ac27a0ec DK |
1869 | iput(root); |
1870 | goto failed_mount4; | |
1871 | } | |
1872 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1873 | dput(sb->s_root); | |
1874 | sb->s_root = NULL; | |
617ba13b | 1875 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
1876 | goto failed_mount4; |
1877 | } | |
1878 | ||
617ba13b | 1879 | ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
1880 | |
1881 | /* determine the minimum size of new large inodes, if present */ | |
1882 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
1883 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
1884 | EXT4_GOOD_OLD_INODE_SIZE; | |
1885 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
1886 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
1887 | if (sbi->s_want_extra_isize < | |
1888 | le16_to_cpu(es->s_want_extra_isize)) | |
1889 | sbi->s_want_extra_isize = | |
1890 | le16_to_cpu(es->s_want_extra_isize); | |
1891 | if (sbi->s_want_extra_isize < | |
1892 | le16_to_cpu(es->s_min_extra_isize)) | |
1893 | sbi->s_want_extra_isize = | |
1894 | le16_to_cpu(es->s_min_extra_isize); | |
1895 | } | |
1896 | } | |
1897 | /* Check if enough inode space is available */ | |
1898 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
1899 | sbi->s_inode_size) { | |
1900 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
1901 | EXT4_GOOD_OLD_INODE_SIZE; | |
1902 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
1903 | "available.\n"); | |
1904 | } | |
1905 | ||
ac27a0ec DK |
1906 | /* |
1907 | * akpm: core read_super() calls in here with the superblock locked. | |
1908 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
1909 | * in numerous places. Here we just pop the lock - it's relatively | |
1910 | * harmless, because we are now ready to accept write_super() requests, | |
1911 | * and aviro says that's the only reason for hanging onto the | |
1912 | * superblock lock. | |
1913 | */ | |
617ba13b MC |
1914 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
1915 | ext4_orphan_cleanup(sb, es); | |
1916 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
ac27a0ec | 1917 | if (needs_recovery) |
617ba13b MC |
1918 | printk (KERN_INFO "EXT4-fs: recovery complete.\n"); |
1919 | ext4_mark_recovery_complete(sb, es); | |
1920 | printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", | |
1921 | test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": | |
1922 | test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": | |
ac27a0ec DK |
1923 | "writeback"); |
1924 | ||
a86c6181 AT |
1925 | ext4_ext_init(sb); |
1926 | ||
ac27a0ec DK |
1927 | lock_kernel(); |
1928 | return 0; | |
1929 | ||
617ba13b | 1930 | cantfind_ext4: |
ac27a0ec | 1931 | if (!silent) |
617ba13b | 1932 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
1933 | sb->s_id); |
1934 | goto failed_mount; | |
1935 | ||
1936 | failed_mount4: | |
dab291af | 1937 | jbd2_journal_destroy(sbi->s_journal); |
ac27a0ec DK |
1938 | failed_mount3: |
1939 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
1940 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
1941 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
1942 | failed_mount2: | |
1943 | for (i = 0; i < db_count; i++) | |
1944 | brelse(sbi->s_group_desc[i]); | |
1945 | kfree(sbi->s_group_desc); | |
1946 | failed_mount: | |
1947 | #ifdef CONFIG_QUOTA | |
1948 | for (i = 0; i < MAXQUOTAS; i++) | |
1949 | kfree(sbi->s_qf_names[i]); | |
1950 | #endif | |
617ba13b | 1951 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
1952 | brelse(bh); |
1953 | out_fail: | |
1954 | sb->s_fs_info = NULL; | |
1955 | kfree(sbi); | |
1956 | lock_kernel(); | |
1957 | return -EINVAL; | |
1958 | } | |
1959 | ||
1960 | /* | |
1961 | * Setup any per-fs journal parameters now. We'll do this both on | |
1962 | * initial mount, once the journal has been initialised but before we've | |
1963 | * done any recovery; and again on any subsequent remount. | |
1964 | */ | |
617ba13b | 1965 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 1966 | { |
617ba13b | 1967 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1968 | |
1969 | if (sbi->s_commit_interval) | |
1970 | journal->j_commit_interval = sbi->s_commit_interval; | |
617ba13b | 1971 | /* We could also set up an ext4-specific default for the commit |
ac27a0ec DK |
1972 | * interval here, but for now we'll just fall back to the jbd |
1973 | * default. */ | |
1974 | ||
1975 | spin_lock(&journal->j_state_lock); | |
1976 | if (test_opt(sb, BARRIER)) | |
dab291af | 1977 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 1978 | else |
dab291af | 1979 | journal->j_flags &= ~JBD2_BARRIER; |
ac27a0ec DK |
1980 | spin_unlock(&journal->j_state_lock); |
1981 | } | |
1982 | ||
617ba13b | 1983 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
1984 | unsigned int journal_inum) |
1985 | { | |
1986 | struct inode *journal_inode; | |
1987 | journal_t *journal; | |
1988 | ||
1989 | /* First, test for the existence of a valid inode on disk. Bad | |
1990 | * things happen if we iget() an unused inode, as the subsequent | |
1991 | * iput() will try to delete it. */ | |
1992 | ||
1993 | journal_inode = iget(sb, journal_inum); | |
1994 | if (!journal_inode) { | |
617ba13b | 1995 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
1996 | return NULL; |
1997 | } | |
1998 | if (!journal_inode->i_nlink) { | |
1999 | make_bad_inode(journal_inode); | |
2000 | iput(journal_inode); | |
617ba13b | 2001 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2002 | return NULL; |
2003 | } | |
2004 | ||
2005 | jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", | |
2006 | journal_inode, journal_inode->i_size); | |
2007 | if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { | |
617ba13b | 2008 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2009 | iput(journal_inode); |
2010 | return NULL; | |
2011 | } | |
2012 | ||
dab291af | 2013 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2014 | if (!journal) { |
617ba13b | 2015 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2016 | iput(journal_inode); |
2017 | return NULL; | |
2018 | } | |
2019 | journal->j_private = sb; | |
617ba13b | 2020 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2021 | return journal; |
2022 | } | |
2023 | ||
617ba13b | 2024 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2025 | dev_t j_dev) |
2026 | { | |
2027 | struct buffer_head * bh; | |
2028 | journal_t *journal; | |
617ba13b MC |
2029 | ext4_fsblk_t start; |
2030 | ext4_fsblk_t len; | |
ac27a0ec | 2031 | int hblock, blocksize; |
617ba13b | 2032 | ext4_fsblk_t sb_block; |
ac27a0ec | 2033 | unsigned long offset; |
617ba13b | 2034 | struct ext4_super_block * es; |
ac27a0ec DK |
2035 | struct block_device *bdev; |
2036 | ||
617ba13b | 2037 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2038 | if (bdev == NULL) |
2039 | return NULL; | |
2040 | ||
2041 | if (bd_claim(bdev, sb)) { | |
2042 | printk(KERN_ERR | |
8c55e204 | 2043 | "EXT4: failed to claim external journal device.\n"); |
ac27a0ec DK |
2044 | blkdev_put(bdev); |
2045 | return NULL; | |
2046 | } | |
2047 | ||
2048 | blocksize = sb->s_blocksize; | |
2049 | hblock = bdev_hardsect_size(bdev); | |
2050 | if (blocksize < hblock) { | |
2051 | printk(KERN_ERR | |
617ba13b | 2052 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2053 | goto out_bdev; |
2054 | } | |
2055 | ||
617ba13b MC |
2056 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2057 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2058 | set_blocksize(bdev, blocksize); |
2059 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2060 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2061 | "external journal\n"); |
2062 | goto out_bdev; | |
2063 | } | |
2064 | ||
617ba13b MC |
2065 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2066 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2067 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2068 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
2069 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
2070 | "bad superblock\n"); |
2071 | brelse(bh); | |
2072 | goto out_bdev; | |
2073 | } | |
2074 | ||
617ba13b MC |
2075 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
2076 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
2077 | brelse(bh); |
2078 | goto out_bdev; | |
2079 | } | |
2080 | ||
bd81d8ee | 2081 | len = ext4_blocks_count(es); |
ac27a0ec DK |
2082 | start = sb_block + 1; |
2083 | brelse(bh); /* we're done with the superblock */ | |
2084 | ||
dab291af | 2085 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
2086 | start, len, blocksize); |
2087 | if (!journal) { | |
617ba13b | 2088 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
2089 | goto out_bdev; |
2090 | } | |
2091 | journal->j_private = sb; | |
2092 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2093 | wait_on_buffer(journal->j_sb_buffer); | |
2094 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 2095 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
2096 | goto out_journal; |
2097 | } | |
2098 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 2099 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
2100 | "user (unsupported) - %d\n", |
2101 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2102 | goto out_journal; | |
2103 | } | |
617ba13b MC |
2104 | EXT4_SB(sb)->journal_bdev = bdev; |
2105 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
2106 | return journal; |
2107 | out_journal: | |
dab291af | 2108 | jbd2_journal_destroy(journal); |
ac27a0ec | 2109 | out_bdev: |
617ba13b | 2110 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
2111 | return NULL; |
2112 | } | |
2113 | ||
617ba13b MC |
2114 | static int ext4_load_journal(struct super_block *sb, |
2115 | struct ext4_super_block *es, | |
ac27a0ec DK |
2116 | unsigned long journal_devnum) |
2117 | { | |
2118 | journal_t *journal; | |
2119 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
2120 | dev_t journal_dev; | |
2121 | int err = 0; | |
2122 | int really_read_only; | |
2123 | ||
2124 | if (journal_devnum && | |
2125 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 2126 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
2127 | "numbers have changed\n"); |
2128 | journal_dev = new_decode_dev(journal_devnum); | |
2129 | } else | |
2130 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2131 | ||
2132 | really_read_only = bdev_read_only(sb->s_bdev); | |
2133 | ||
2134 | /* | |
2135 | * Are we loading a blank journal or performing recovery after a | |
2136 | * crash? For recovery, we need to check in advance whether we | |
2137 | * can get read-write access to the device. | |
2138 | */ | |
2139 | ||
617ba13b | 2140 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 2141 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 2142 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
2143 | "required on readonly filesystem.\n"); |
2144 | if (really_read_only) { | |
617ba13b | 2145 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
2146 | "unavailable, cannot proceed.\n"); |
2147 | return -EROFS; | |
2148 | } | |
617ba13b | 2149 | printk (KERN_INFO "EXT4-fs: write access will " |
ac27a0ec DK |
2150 | "be enabled during recovery.\n"); |
2151 | } | |
2152 | } | |
2153 | ||
2154 | if (journal_inum && journal_dev) { | |
617ba13b | 2155 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
2156 | "and inode journals!\n"); |
2157 | return -EINVAL; | |
2158 | } | |
2159 | ||
2160 | if (journal_inum) { | |
617ba13b | 2161 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
2162 | return -EINVAL; |
2163 | } else { | |
617ba13b | 2164 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
2165 | return -EINVAL; |
2166 | } | |
2167 | ||
2168 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { | |
dab291af | 2169 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 2170 | if (err) { |
617ba13b | 2171 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 2172 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2173 | return err; |
2174 | } | |
2175 | } | |
2176 | ||
617ba13b | 2177 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 2178 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 2179 | if (!err) |
dab291af | 2180 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
2181 | |
2182 | if (err) { | |
617ba13b | 2183 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 2184 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2185 | return err; |
2186 | } | |
2187 | ||
617ba13b MC |
2188 | EXT4_SB(sb)->s_journal = journal; |
2189 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
2190 | |
2191 | if (journal_devnum && | |
2192 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2193 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
2194 | sb->s_dirt = 1; | |
2195 | ||
2196 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2197 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2198 | } |
2199 | ||
2200 | return 0; | |
2201 | } | |
2202 | ||
617ba13b MC |
2203 | static int ext4_create_journal(struct super_block * sb, |
2204 | struct ext4_super_block * es, | |
ac27a0ec DK |
2205 | unsigned int journal_inum) |
2206 | { | |
2207 | journal_t *journal; | |
6c675bd4 | 2208 | int err; |
ac27a0ec DK |
2209 | |
2210 | if (sb->s_flags & MS_RDONLY) { | |
617ba13b | 2211 | printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " |
ac27a0ec DK |
2212 | "create journal.\n"); |
2213 | return -EROFS; | |
2214 | } | |
2215 | ||
6c675bd4 BP |
2216 | journal = ext4_get_journal(sb, journal_inum); |
2217 | if (!journal) | |
ac27a0ec DK |
2218 | return -EINVAL; |
2219 | ||
617ba13b | 2220 | printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", |
ac27a0ec DK |
2221 | journal_inum); |
2222 | ||
6c675bd4 BP |
2223 | err = jbd2_journal_create(journal); |
2224 | if (err) { | |
617ba13b | 2225 | printk(KERN_ERR "EXT4-fs: error creating journal.\n"); |
dab291af | 2226 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2227 | return -EIO; |
2228 | } | |
2229 | ||
617ba13b | 2230 | EXT4_SB(sb)->s_journal = journal; |
ac27a0ec | 2231 | |
617ba13b MC |
2232 | ext4_update_dynamic_rev(sb); |
2233 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
2234 | EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); | |
ac27a0ec DK |
2235 | |
2236 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
2237 | sb->s_dirt = 1; | |
2238 | ||
2239 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2240 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2241 | |
2242 | return 0; | |
2243 | } | |
2244 | ||
617ba13b MC |
2245 | static void ext4_commit_super (struct super_block * sb, |
2246 | struct ext4_super_block * es, | |
ac27a0ec DK |
2247 | int sync) |
2248 | { | |
617ba13b | 2249 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
ac27a0ec DK |
2250 | |
2251 | if (!sbh) | |
2252 | return; | |
2253 | es->s_wtime = cpu_to_le32(get_seconds()); | |
bd81d8ee | 2254 | ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); |
617ba13b | 2255 | es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2256 | BUFFER_TRACE(sbh, "marking dirty"); |
2257 | mark_buffer_dirty(sbh); | |
2258 | if (sync) | |
2259 | sync_dirty_buffer(sbh); | |
2260 | } | |
2261 | ||
2262 | ||
2263 | /* | |
2264 | * Have we just finished recovery? If so, and if we are mounting (or | |
2265 | * remounting) the filesystem readonly, then we will end up with a | |
2266 | * consistent fs on disk. Record that fact. | |
2267 | */ | |
617ba13b MC |
2268 | static void ext4_mark_recovery_complete(struct super_block * sb, |
2269 | struct ext4_super_block * es) | |
ac27a0ec | 2270 | { |
617ba13b | 2271 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2272 | |
dab291af MC |
2273 | jbd2_journal_lock_updates(journal); |
2274 | jbd2_journal_flush(journal); | |
32c37730 | 2275 | lock_super(sb); |
617ba13b | 2276 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 2277 | sb->s_flags & MS_RDONLY) { |
617ba13b | 2278 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 2279 | sb->s_dirt = 0; |
617ba13b | 2280 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2281 | } |
32c37730 | 2282 | unlock_super(sb); |
dab291af | 2283 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
2284 | } |
2285 | ||
2286 | /* | |
2287 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2288 | * has recorded an error from a previous lifetime, move that error to the | |
2289 | * main filesystem now. | |
2290 | */ | |
617ba13b MC |
2291 | static void ext4_clear_journal_err(struct super_block * sb, |
2292 | struct ext4_super_block * es) | |
ac27a0ec DK |
2293 | { |
2294 | journal_t *journal; | |
2295 | int j_errno; | |
2296 | const char *errstr; | |
2297 | ||
617ba13b | 2298 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2299 | |
2300 | /* | |
2301 | * Now check for any error status which may have been recorded in the | |
617ba13b | 2302 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
2303 | */ |
2304 | ||
dab291af | 2305 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
2306 | if (j_errno) { |
2307 | char nbuf[16]; | |
2308 | ||
617ba13b MC |
2309 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
2310 | ext4_warning(sb, __FUNCTION__, "Filesystem error recorded " | |
ac27a0ec | 2311 | "from previous mount: %s", errstr); |
617ba13b | 2312 | ext4_warning(sb, __FUNCTION__, "Marking fs in need of " |
ac27a0ec DK |
2313 | "filesystem check."); |
2314 | ||
617ba13b MC |
2315 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
2316 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2317 | ext4_commit_super (sb, es, 1); | |
ac27a0ec | 2318 | |
dab291af | 2319 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
2320 | } |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Force the running and committing transactions to commit, | |
2325 | * and wait on the commit. | |
2326 | */ | |
617ba13b | 2327 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
2328 | { |
2329 | journal_t *journal; | |
2330 | int ret; | |
2331 | ||
2332 | if (sb->s_flags & MS_RDONLY) | |
2333 | return 0; | |
2334 | ||
617ba13b | 2335 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2336 | sb->s_dirt = 0; |
617ba13b | 2337 | ret = ext4_journal_force_commit(journal); |
ac27a0ec DK |
2338 | return ret; |
2339 | } | |
2340 | ||
2341 | /* | |
617ba13b | 2342 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec DK |
2343 | * have to propagate any other updates to the superblock on disk at this |
2344 | * point. Just start an async writeback to get the buffers on their way | |
2345 | * to the disk. | |
2346 | * | |
2347 | * This implicitly triggers the writebehind on sync(). | |
2348 | */ | |
2349 | ||
617ba13b | 2350 | static void ext4_write_super (struct super_block * sb) |
ac27a0ec DK |
2351 | { |
2352 | if (mutex_trylock(&sb->s_lock) != 0) | |
2353 | BUG(); | |
2354 | sb->s_dirt = 0; | |
2355 | } | |
2356 | ||
617ba13b | 2357 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec DK |
2358 | { |
2359 | tid_t target; | |
2360 | ||
2361 | sb->s_dirt = 0; | |
dab291af | 2362 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { |
ac27a0ec | 2363 | if (wait) |
dab291af | 2364 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); |
ac27a0ec DK |
2365 | } |
2366 | return 0; | |
2367 | } | |
2368 | ||
2369 | /* | |
2370 | * LVM calls this function before a (read-only) snapshot is created. This | |
2371 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2372 | */ | |
617ba13b | 2373 | static void ext4_write_super_lockfs(struct super_block *sb) |
ac27a0ec DK |
2374 | { |
2375 | sb->s_dirt = 0; | |
2376 | ||
2377 | if (!(sb->s_flags & MS_RDONLY)) { | |
617ba13b | 2378 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2379 | |
2380 | /* Now we set up the journal barrier. */ | |
dab291af MC |
2381 | jbd2_journal_lock_updates(journal); |
2382 | jbd2_journal_flush(journal); | |
ac27a0ec DK |
2383 | |
2384 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b MC |
2385 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2386 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec DK |
2387 | } |
2388 | } | |
2389 | ||
2390 | /* | |
2391 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2392 | * flag here, even though the filesystem is not technically dirty yet. | |
2393 | */ | |
617ba13b | 2394 | static void ext4_unlockfs(struct super_block *sb) |
ac27a0ec DK |
2395 | { |
2396 | if (!(sb->s_flags & MS_RDONLY)) { | |
2397 | lock_super(sb); | |
2398 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
2399 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2400 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 2401 | unlock_super(sb); |
dab291af | 2402 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec DK |
2403 | } |
2404 | } | |
2405 | ||
617ba13b | 2406 | static int ext4_remount (struct super_block * sb, int * flags, char * data) |
ac27a0ec | 2407 | { |
617ba13b MC |
2408 | struct ext4_super_block * es; |
2409 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2410 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 2411 | unsigned long old_sb_flags; |
617ba13b | 2412 | struct ext4_mount_options old_opts; |
ac27a0ec DK |
2413 | int err; |
2414 | #ifdef CONFIG_QUOTA | |
2415 | int i; | |
2416 | #endif | |
2417 | ||
2418 | /* Store the original options */ | |
2419 | old_sb_flags = sb->s_flags; | |
2420 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2421 | old_opts.s_resuid = sbi->s_resuid; | |
2422 | old_opts.s_resgid = sbi->s_resgid; | |
2423 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2424 | #ifdef CONFIG_QUOTA | |
2425 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2426 | for (i = 0; i < MAXQUOTAS; i++) | |
2427 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2428 | #endif | |
2429 | ||
2430 | /* | |
2431 | * Allow the "check" option to be passed as a remount option. | |
2432 | */ | |
2433 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { | |
2434 | err = -EINVAL; | |
2435 | goto restore_opts; | |
2436 | } | |
2437 | ||
617ba13b MC |
2438 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
2439 | ext4_abort(sb, __FUNCTION__, "Abort forced by user"); | |
ac27a0ec DK |
2440 | |
2441 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2442 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
2443 | |
2444 | es = sbi->s_es; | |
2445 | ||
617ba13b | 2446 | ext4_init_journal_params(sb, sbi->s_journal); |
ac27a0ec DK |
2447 | |
2448 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 2449 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 2450 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
2451 | err = -EROFS; |
2452 | goto restore_opts; | |
2453 | } | |
2454 | ||
2455 | if (*flags & MS_RDONLY) { | |
2456 | /* | |
2457 | * First of all, the unconditional stuff we have to do | |
2458 | * to disable replay of the journal when we next remount | |
2459 | */ | |
2460 | sb->s_flags |= MS_RDONLY; | |
2461 | ||
2462 | /* | |
2463 | * OK, test if we are remounting a valid rw partition | |
2464 | * readonly, and if so set the rdonly flag and then | |
2465 | * mark the partition as valid again. | |
2466 | */ | |
617ba13b MC |
2467 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
2468 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
2469 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
2470 | ||
32c37730 JK |
2471 | /* |
2472 | * We have to unlock super so that we can wait for | |
2473 | * transactions. | |
2474 | */ | |
2475 | unlock_super(sb); | |
617ba13b | 2476 | ext4_mark_recovery_complete(sb, es); |
32c37730 | 2477 | lock_super(sb); |
ac27a0ec DK |
2478 | } else { |
2479 | __le32 ret; | |
617ba13b MC |
2480 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2481 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
2482 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec DK |
2483 | "remount RDWR because of unsupported " |
2484 | "optional features (%x).\n", | |
2485 | sb->s_id, le32_to_cpu(ret)); | |
2486 | err = -EROFS; | |
2487 | goto restore_opts; | |
2488 | } | |
ead6596b ES |
2489 | |
2490 | /* | |
2491 | * If we have an unprocessed orphan list hanging | |
2492 | * around from a previously readonly bdev mount, | |
2493 | * require a full umount/remount for now. | |
2494 | */ | |
2495 | if (es->s_last_orphan) { | |
2496 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
2497 | "remount RDWR because of unprocessed " | |
2498 | "orphan inode list. Please " | |
2499 | "umount/remount instead.\n", | |
2500 | sb->s_id); | |
2501 | err = -EINVAL; | |
2502 | goto restore_opts; | |
2503 | } | |
2504 | ||
ac27a0ec DK |
2505 | /* |
2506 | * Mounting a RDONLY partition read-write, so reread | |
2507 | * and store the current valid flag. (It may have | |
2508 | * been changed by e2fsck since we originally mounted | |
2509 | * the partition.) | |
2510 | */ | |
617ba13b | 2511 | ext4_clear_journal_err(sb, es); |
ac27a0ec | 2512 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 2513 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 2514 | goto restore_opts; |
617ba13b | 2515 | if (!ext4_setup_super (sb, es, 0)) |
ac27a0ec DK |
2516 | sb->s_flags &= ~MS_RDONLY; |
2517 | } | |
2518 | } | |
2519 | #ifdef CONFIG_QUOTA | |
2520 | /* Release old quota file names */ | |
2521 | for (i = 0; i < MAXQUOTAS; i++) | |
2522 | if (old_opts.s_qf_names[i] && | |
2523 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2524 | kfree(old_opts.s_qf_names[i]); | |
2525 | #endif | |
2526 | return 0; | |
2527 | restore_opts: | |
2528 | sb->s_flags = old_sb_flags; | |
2529 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
2530 | sbi->s_resuid = old_opts.s_resuid; | |
2531 | sbi->s_resgid = old_opts.s_resgid; | |
2532 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
2533 | #ifdef CONFIG_QUOTA | |
2534 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
2535 | for (i = 0; i < MAXQUOTAS; i++) { | |
2536 | if (sbi->s_qf_names[i] && | |
2537 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
2538 | kfree(sbi->s_qf_names[i]); | |
2539 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
2540 | } | |
2541 | #endif | |
2542 | return err; | |
2543 | } | |
2544 | ||
617ba13b | 2545 | static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) |
ac27a0ec DK |
2546 | { |
2547 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
2548 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2549 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 2550 | u64 fsid; |
ac27a0ec | 2551 | |
5e70030d BP |
2552 | if (test_opt(sb, MINIX_DF)) { |
2553 | sbi->s_overhead_last = 0; | |
2554 | } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { | |
2555 | unsigned long ngroups = sbi->s_groups_count, i; | |
2556 | ext4_fsblk_t overhead = 0; | |
ac27a0ec DK |
2557 | smp_rmb(); |
2558 | ||
2559 | /* | |
5e70030d BP |
2560 | * Compute the overhead (FS structures). This is constant |
2561 | * for a given filesystem unless the number of block groups | |
2562 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
2563 | */ |
2564 | ||
2565 | /* | |
2566 | * All of the blocks before first_data_block are | |
2567 | * overhead | |
2568 | */ | |
2569 | overhead = le32_to_cpu(es->s_first_data_block); | |
2570 | ||
2571 | /* | |
2572 | * Add the overhead attributed to the superblock and | |
2573 | * block group descriptors. If the sparse superblocks | |
2574 | * feature is turned on, then not all groups have this. | |
2575 | */ | |
2576 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
2577 | overhead += ext4_bg_has_super(sb, i) + |
2578 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
2579 | cond_resched(); |
2580 | } | |
2581 | ||
2582 | /* | |
2583 | * Every block group has an inode bitmap, a block | |
2584 | * bitmap, and an inode table. | |
2585 | */ | |
5e70030d BP |
2586 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
2587 | sbi->s_overhead_last = overhead; | |
2588 | smp_wmb(); | |
2589 | sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); | |
ac27a0ec DK |
2590 | } |
2591 | ||
617ba13b | 2592 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 2593 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 2594 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
ac27a0ec | 2595 | buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter); |
5e70030d | 2596 | es->s_free_blocks_count = cpu_to_le32(buf->f_bfree); |
bd81d8ee LV |
2597 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
2598 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
2599 | buf->f_bavail = 0; |
2600 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
2601 | buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter); | |
5e70030d | 2602 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 2603 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
2604 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
2605 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
2606 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
2607 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
2608 | return 0; |
2609 | } | |
2610 | ||
2611 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
2612 | * is locked for write. Otherwise the are possible deadlocks: | |
2613 | * Process 1 Process 2 | |
617ba13b | 2614 | * ext4_create() quota_sync() |
dab291af | 2615 | * jbd2_journal_start() write_dquot() |
ac27a0ec | 2616 | * DQUOT_INIT() down(dqio_mutex) |
dab291af | 2617 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
2618 | * |
2619 | */ | |
2620 | ||
2621 | #ifdef CONFIG_QUOTA | |
2622 | ||
2623 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
2624 | { | |
2625 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
2626 | } | |
2627 | ||
617ba13b | 2628 | static int ext4_dquot_initialize(struct inode *inode, int type) |
ac27a0ec DK |
2629 | { |
2630 | handle_t *handle; | |
2631 | int ret, err; | |
2632 | ||
2633 | /* We may create quota structure so we need to reserve enough blocks */ | |
617ba13b | 2634 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); |
ac27a0ec DK |
2635 | if (IS_ERR(handle)) |
2636 | return PTR_ERR(handle); | |
2637 | ret = dquot_initialize(inode, type); | |
617ba13b | 2638 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2639 | if (!ret) |
2640 | ret = err; | |
2641 | return ret; | |
2642 | } | |
2643 | ||
617ba13b | 2644 | static int ext4_dquot_drop(struct inode *inode) |
ac27a0ec DK |
2645 | { |
2646 | handle_t *handle; | |
2647 | int ret, err; | |
2648 | ||
2649 | /* We may delete quota structure so we need to reserve enough blocks */ | |
617ba13b | 2650 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); |
ac27a0ec DK |
2651 | if (IS_ERR(handle)) |
2652 | return PTR_ERR(handle); | |
2653 | ret = dquot_drop(inode); | |
617ba13b | 2654 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2655 | if (!ret) |
2656 | ret = err; | |
2657 | return ret; | |
2658 | } | |
2659 | ||
617ba13b | 2660 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
2661 | { |
2662 | int ret, err; | |
2663 | handle_t *handle; | |
2664 | struct inode *inode; | |
2665 | ||
2666 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
2667 | handle = ext4_journal_start(inode, |
2668 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
2669 | if (IS_ERR(handle)) |
2670 | return PTR_ERR(handle); | |
2671 | ret = dquot_commit(dquot); | |
617ba13b | 2672 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2673 | if (!ret) |
2674 | ret = err; | |
2675 | return ret; | |
2676 | } | |
2677 | ||
617ba13b | 2678 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
2679 | { |
2680 | int ret, err; | |
2681 | handle_t *handle; | |
2682 | ||
617ba13b MC |
2683 | handle = ext4_journal_start(dquot_to_inode(dquot), |
2684 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
2685 | if (IS_ERR(handle)) |
2686 | return PTR_ERR(handle); | |
2687 | ret = dquot_acquire(dquot); | |
617ba13b | 2688 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2689 | if (!ret) |
2690 | ret = err; | |
2691 | return ret; | |
2692 | } | |
2693 | ||
617ba13b | 2694 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
2695 | { |
2696 | int ret, err; | |
2697 | handle_t *handle; | |
2698 | ||
617ba13b MC |
2699 | handle = ext4_journal_start(dquot_to_inode(dquot), |
2700 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
2701 | if (IS_ERR(handle)) { |
2702 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
2703 | dquot_release(dquot); | |
ac27a0ec | 2704 | return PTR_ERR(handle); |
9c3013e9 | 2705 | } |
ac27a0ec | 2706 | ret = dquot_release(dquot); |
617ba13b | 2707 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2708 | if (!ret) |
2709 | ret = err; | |
2710 | return ret; | |
2711 | } | |
2712 | ||
617ba13b | 2713 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec DK |
2714 | { |
2715 | /* Are we journalling quotas? */ | |
617ba13b MC |
2716 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
2717 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 2718 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 2719 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
2720 | } else { |
2721 | return dquot_mark_dquot_dirty(dquot); | |
2722 | } | |
2723 | } | |
2724 | ||
617ba13b | 2725 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
2726 | { |
2727 | int ret, err; | |
2728 | handle_t *handle; | |
2729 | ||
2730 | /* Data block + inode block */ | |
617ba13b | 2731 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
2732 | if (IS_ERR(handle)) |
2733 | return PTR_ERR(handle); | |
2734 | ret = dquot_commit_info(sb, type); | |
617ba13b | 2735 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
2736 | if (!ret) |
2737 | ret = err; | |
2738 | return ret; | |
2739 | } | |
2740 | ||
2741 | /* | |
2742 | * Turn on quotas during mount time - we need to find | |
2743 | * the quota file and such... | |
2744 | */ | |
617ba13b | 2745 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 2746 | { |
617ba13b MC |
2747 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
2748 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
2749 | } |
2750 | ||
2751 | /* | |
2752 | * Standard function to be called on quota_on | |
2753 | */ | |
617ba13b | 2754 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
ac27a0ec DK |
2755 | char *path) |
2756 | { | |
2757 | int err; | |
2758 | struct nameidata nd; | |
2759 | ||
2760 | if (!test_opt(sb, QUOTA)) | |
2761 | return -EINVAL; | |
2762 | /* Not journalling quota? */ | |
617ba13b MC |
2763 | if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] && |
2764 | !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) | |
ac27a0ec DK |
2765 | return vfs_quota_on(sb, type, format_id, path); |
2766 | err = path_lookup(path, LOOKUP_FOLLOW, &nd); | |
2767 | if (err) | |
2768 | return err; | |
2769 | /* Quotafile not on the same filesystem? */ | |
2770 | if (nd.mnt->mnt_sb != sb) { | |
2771 | path_release(&nd); | |
2772 | return -EXDEV; | |
2773 | } | |
2774 | /* Quotafile not of fs root? */ | |
2775 | if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) | |
2776 | printk(KERN_WARNING | |
617ba13b | 2777 | "EXT4-fs: Quota file not on filesystem root. " |
ac27a0ec DK |
2778 | "Journalled quota will not work.\n"); |
2779 | path_release(&nd); | |
2780 | return vfs_quota_on(sb, type, format_id, path); | |
2781 | } | |
2782 | ||
2783 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
2784 | * acquiring the locks... As quota files are never truncated and quota code | |
2785 | * itself serializes the operations (and noone else should touch the files) | |
2786 | * we don't have to be afraid of races */ | |
617ba13b | 2787 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
2788 | size_t len, loff_t off) |
2789 | { | |
2790 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
617ba13b | 2791 | sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
2792 | int err = 0; |
2793 | int offset = off & (sb->s_blocksize - 1); | |
2794 | int tocopy; | |
2795 | size_t toread; | |
2796 | struct buffer_head *bh; | |
2797 | loff_t i_size = i_size_read(inode); | |
2798 | ||
2799 | if (off > i_size) | |
2800 | return 0; | |
2801 | if (off+len > i_size) | |
2802 | len = i_size-off; | |
2803 | toread = len; | |
2804 | while (toread > 0) { | |
2805 | tocopy = sb->s_blocksize - offset < toread ? | |
2806 | sb->s_blocksize - offset : toread; | |
617ba13b | 2807 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
2808 | if (err) |
2809 | return err; | |
2810 | if (!bh) /* A hole? */ | |
2811 | memset(data, 0, tocopy); | |
2812 | else | |
2813 | memcpy(data, bh->b_data+offset, tocopy); | |
2814 | brelse(bh); | |
2815 | offset = 0; | |
2816 | toread -= tocopy; | |
2817 | data += tocopy; | |
2818 | blk++; | |
2819 | } | |
2820 | return len; | |
2821 | } | |
2822 | ||
2823 | /* Write to quotafile (we know the transaction is already started and has | |
2824 | * enough credits) */ | |
617ba13b | 2825 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
2826 | const char *data, size_t len, loff_t off) |
2827 | { | |
2828 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
617ba13b | 2829 | sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
2830 | int err = 0; |
2831 | int offset = off & (sb->s_blocksize - 1); | |
2832 | int tocopy; | |
617ba13b | 2833 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
2834 | size_t towrite = len; |
2835 | struct buffer_head *bh; | |
2836 | handle_t *handle = journal_current_handle(); | |
2837 | ||
9c3013e9 JK |
2838 | if (!handle) { |
2839 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" | |
2840 | " cancelled because transaction is not started.\n", | |
2841 | (unsigned long long)off, (unsigned long long)len); | |
2842 | return -EIO; | |
2843 | } | |
ac27a0ec DK |
2844 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
2845 | while (towrite > 0) { | |
2846 | tocopy = sb->s_blocksize - offset < towrite ? | |
2847 | sb->s_blocksize - offset : towrite; | |
617ba13b | 2848 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
2849 | if (!bh) |
2850 | goto out; | |
2851 | if (journal_quota) { | |
617ba13b | 2852 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
2853 | if (err) { |
2854 | brelse(bh); | |
2855 | goto out; | |
2856 | } | |
2857 | } | |
2858 | lock_buffer(bh); | |
2859 | memcpy(bh->b_data+offset, data, tocopy); | |
2860 | flush_dcache_page(bh->b_page); | |
2861 | unlock_buffer(bh); | |
2862 | if (journal_quota) | |
617ba13b | 2863 | err = ext4_journal_dirty_metadata(handle, bh); |
ac27a0ec DK |
2864 | else { |
2865 | /* Always do at least ordered writes for quotas */ | |
617ba13b | 2866 | err = ext4_journal_dirty_data(handle, bh); |
ac27a0ec DK |
2867 | mark_buffer_dirty(bh); |
2868 | } | |
2869 | brelse(bh); | |
2870 | if (err) | |
2871 | goto out; | |
2872 | offset = 0; | |
2873 | towrite -= tocopy; | |
2874 | data += tocopy; | |
2875 | blk++; | |
2876 | } | |
2877 | out: | |
2878 | if (len == towrite) | |
2879 | return err; | |
2880 | if (inode->i_size < off+len-towrite) { | |
2881 | i_size_write(inode, off+len-towrite); | |
617ba13b | 2882 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec DK |
2883 | } |
2884 | inode->i_version++; | |
2885 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
617ba13b | 2886 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
2887 | mutex_unlock(&inode->i_mutex); |
2888 | return len - towrite; | |
2889 | } | |
2890 | ||
2891 | #endif | |
2892 | ||
617ba13b | 2893 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
2894 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
2895 | { | |
617ba13b | 2896 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
2897 | } |
2898 | ||
617ba13b | 2899 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 2900 | .owner = THIS_MODULE, |
617ba13b MC |
2901 | .name = "ext4dev", |
2902 | .get_sb = ext4_get_sb, | |
ac27a0ec DK |
2903 | .kill_sb = kill_block_super, |
2904 | .fs_flags = FS_REQUIRES_DEV, | |
2905 | }; | |
2906 | ||
617ba13b | 2907 | static int __init init_ext4_fs(void) |
ac27a0ec | 2908 | { |
617ba13b | 2909 | int err = init_ext4_xattr(); |
ac27a0ec DK |
2910 | if (err) |
2911 | return err; | |
2912 | err = init_inodecache(); | |
2913 | if (err) | |
2914 | goto out1; | |
63f57933 | 2915 | err = register_filesystem(&ext4dev_fs_type); |
ac27a0ec DK |
2916 | if (err) |
2917 | goto out; | |
2918 | return 0; | |
2919 | out: | |
2920 | destroy_inodecache(); | |
2921 | out1: | |
617ba13b | 2922 | exit_ext4_xattr(); |
ac27a0ec DK |
2923 | return err; |
2924 | } | |
2925 | ||
617ba13b | 2926 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 2927 | { |
617ba13b | 2928 | unregister_filesystem(&ext4dev_fs_type); |
ac27a0ec | 2929 | destroy_inodecache(); |
617ba13b | 2930 | exit_ext4_xattr(); |
ac27a0ec DK |
2931 | } |
2932 | ||
2933 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
617ba13b | 2934 | MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); |
ac27a0ec | 2935 | MODULE_LICENSE("GPL"); |
617ba13b MC |
2936 | module_init(init_ext4_fs) |
2937 | module_exit(exit_ext4_fs) |