Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
dab291af | 23 | #include <linux/jbd2.h> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/parser.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/buffer_head.h> | |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
ede86cc4 | 38 | #include <linux/marker.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
3dcf5451 CH |
43 | #include "ext4.h" |
44 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
45 | #include "xattr.h" |
46 | #include "acl.h" | |
47 | #include "namei.h" | |
717d50e4 | 48 | #include "group.h" |
ac27a0ec | 49 | |
9f6200bb TT |
50 | struct proc_dir_entry *ext4_proc_root; |
51 | ||
617ba13b | 52 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 53 | unsigned long journal_devnum); |
617ba13b | 54 | static int ext4_create_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 55 | unsigned int); |
2b2d6d01 TT |
56 | static void ext4_commit_super(struct super_block *sb, |
57 | struct ext4_super_block *es, int sync); | |
58 | static void ext4_mark_recovery_complete(struct super_block *sb, | |
59 | struct ext4_super_block *es); | |
60 | static void ext4_clear_journal_err(struct super_block *sb, | |
61 | struct ext4_super_block *es); | |
617ba13b | 62 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 63 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 64 | char nbuf[16]); |
2b2d6d01 TT |
65 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
66 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
617ba13b | 67 | static void ext4_unlockfs(struct super_block *sb); |
2b2d6d01 | 68 | static void ext4_write_super(struct super_block *sb); |
617ba13b | 69 | static void ext4_write_super_lockfs(struct super_block *sb); |
ac27a0ec | 70 | |
bd81d8ee | 71 | |
8fadc143 AR |
72 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
73 | struct ext4_group_desc *bg) | |
bd81d8ee | 74 | { |
3a14589c | 75 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 76 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 77 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
78 | } |
79 | ||
8fadc143 AR |
80 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
81 | struct ext4_group_desc *bg) | |
bd81d8ee | 82 | { |
5272f837 | 83 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 84 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 85 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
86 | } |
87 | ||
8fadc143 AR |
88 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
89 | struct ext4_group_desc *bg) | |
bd81d8ee | 90 | { |
5272f837 | 91 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 92 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 93 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
94 | } |
95 | ||
8fadc143 AR |
96 | void ext4_block_bitmap_set(struct super_block *sb, |
97 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 98 | { |
3a14589c | 99 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
100 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
101 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
102 | } |
103 | ||
8fadc143 AR |
104 | void ext4_inode_bitmap_set(struct super_block *sb, |
105 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 106 | { |
5272f837 | 107 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
108 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
109 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
110 | } |
111 | ||
8fadc143 AR |
112 | void ext4_inode_table_set(struct super_block *sb, |
113 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 114 | { |
5272f837 | 115 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
116 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
117 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
118 | } |
119 | ||
ac27a0ec | 120 | /* |
dab291af | 121 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
122 | * |
123 | * The only special thing we need to do here is to make sure that all | |
124 | * journal_end calls result in the superblock being marked dirty, so | |
125 | * that sync() will call the filesystem's write_super callback if | |
126 | * appropriate. | |
127 | */ | |
617ba13b | 128 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
129 | { |
130 | journal_t *journal; | |
131 | ||
132 | if (sb->s_flags & MS_RDONLY) | |
133 | return ERR_PTR(-EROFS); | |
134 | ||
135 | /* Special case here: if the journal has aborted behind our | |
136 | * backs (eg. EIO in the commit thread), then we still need to | |
137 | * take the FS itself readonly cleanly. */ | |
617ba13b | 138 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 139 | if (is_journal_aborted(journal)) { |
46e665e9 | 140 | ext4_abort(sb, __func__, |
ac27a0ec DK |
141 | "Detected aborted journal"); |
142 | return ERR_PTR(-EROFS); | |
143 | } | |
144 | ||
dab291af | 145 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
146 | } |
147 | ||
148 | /* | |
149 | * The only special thing we need to do here is to make sure that all | |
dab291af | 150 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
151 | * that sync() will call the filesystem's write_super callback if |
152 | * appropriate. | |
153 | */ | |
617ba13b | 154 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
155 | { |
156 | struct super_block *sb; | |
157 | int err; | |
158 | int rc; | |
159 | ||
160 | sb = handle->h_transaction->t_journal->j_private; | |
161 | err = handle->h_err; | |
dab291af | 162 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
163 | |
164 | if (!err) | |
165 | err = rc; | |
166 | if (err) | |
617ba13b | 167 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
168 | return err; |
169 | } | |
170 | ||
617ba13b | 171 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
172 | struct buffer_head *bh, handle_t *handle, int err) |
173 | { | |
174 | char nbuf[16]; | |
617ba13b | 175 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec DK |
176 | |
177 | if (bh) | |
178 | BUFFER_TRACE(bh, "abort"); | |
179 | ||
180 | if (!handle->h_err) | |
181 | handle->h_err = err; | |
182 | ||
183 | if (is_handle_aborted(handle)) | |
184 | return; | |
185 | ||
186 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
187 | caller, errstr, err_fn); | |
188 | ||
dab291af | 189 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
190 | } |
191 | ||
192 | /* Deal with the reporting of failure conditions on a filesystem such as | |
193 | * inconsistencies detected or read IO failures. | |
194 | * | |
195 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 196 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
197 | * write ordering constraints on the superblock which prevent us from |
198 | * writing it out straight away; and given that the journal is about to | |
199 | * be aborted, we can't rely on the current, or future, transactions to | |
200 | * write out the superblock safely. | |
201 | * | |
dab291af | 202 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
203 | * the journal instead. On recovery, the journal will compain about |
204 | * that error until we've noted it down and cleared it. | |
205 | */ | |
206 | ||
617ba13b | 207 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 208 | { |
617ba13b | 209 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 210 | |
617ba13b MC |
211 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
212 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
213 | |
214 | if (sb->s_flags & MS_RDONLY) | |
215 | return; | |
216 | ||
2b2d6d01 | 217 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 218 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 219 | |
617ba13b | 220 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 221 | if (journal) |
dab291af | 222 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 223 | } |
2b2d6d01 TT |
224 | if (test_opt(sb, ERRORS_RO)) { |
225 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
226 | sb->s_flags |= MS_RDONLY; |
227 | } | |
617ba13b | 228 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 229 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 230 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
231 | sb->s_id); |
232 | } | |
233 | ||
2b2d6d01 TT |
234 | void ext4_error(struct super_block *sb, const char *function, |
235 | const char *fmt, ...) | |
ac27a0ec DK |
236 | { |
237 | va_list args; | |
238 | ||
239 | va_start(args, fmt); | |
2b2d6d01 | 240 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
241 | vprintk(fmt, args); |
242 | printk("\n"); | |
243 | va_end(args); | |
244 | ||
617ba13b | 245 | ext4_handle_error(sb); |
ac27a0ec DK |
246 | } |
247 | ||
2b2d6d01 | 248 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
249 | char nbuf[16]) |
250 | { | |
251 | char *errstr = NULL; | |
252 | ||
253 | switch (errno) { | |
254 | case -EIO: | |
255 | errstr = "IO failure"; | |
256 | break; | |
257 | case -ENOMEM: | |
258 | errstr = "Out of memory"; | |
259 | break; | |
260 | case -EROFS: | |
dab291af | 261 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
262 | errstr = "Journal has aborted"; |
263 | else | |
264 | errstr = "Readonly filesystem"; | |
265 | break; | |
266 | default: | |
267 | /* If the caller passed in an extra buffer for unknown | |
268 | * errors, textualise them now. Else we just return | |
269 | * NULL. */ | |
270 | if (nbuf) { | |
271 | /* Check for truncated error codes... */ | |
272 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
273 | errstr = nbuf; | |
274 | } | |
275 | break; | |
276 | } | |
277 | ||
278 | return errstr; | |
279 | } | |
280 | ||
617ba13b | 281 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
282 | * automatically and invokes the appropriate error response. */ |
283 | ||
2b2d6d01 | 284 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
285 | { |
286 | char nbuf[16]; | |
287 | const char *errstr; | |
288 | ||
289 | /* Special case: if the error is EROFS, and we're not already | |
290 | * inside a transaction, then there's really no point in logging | |
291 | * an error. */ | |
292 | if (errno == -EROFS && journal_current_handle() == NULL && | |
293 | (sb->s_flags & MS_RDONLY)) | |
294 | return; | |
295 | ||
617ba13b | 296 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
297 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
298 | sb->s_id, function, errstr); | |
ac27a0ec | 299 | |
617ba13b | 300 | ext4_handle_error(sb); |
ac27a0ec DK |
301 | } |
302 | ||
303 | /* | |
617ba13b | 304 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
305 | * abort function may be used to deal with unrecoverable failures such |
306 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
307 | * | |
308 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
309 | * unless the error response on the fs has been set to panic in which | |
310 | * case we take the easy way out and panic immediately. | |
311 | */ | |
312 | ||
2b2d6d01 TT |
313 | void ext4_abort(struct super_block *sb, const char *function, |
314 | const char *fmt, ...) | |
ac27a0ec DK |
315 | { |
316 | va_list args; | |
317 | ||
2b2d6d01 | 318 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
319 | |
320 | va_start(args, fmt); | |
2b2d6d01 | 321 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
322 | vprintk(fmt, args); |
323 | printk("\n"); | |
324 | va_end(args); | |
325 | ||
326 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 327 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
328 | |
329 | if (sb->s_flags & MS_RDONLY) | |
330 | return; | |
331 | ||
332 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 333 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 334 | sb->s_flags |= MS_RDONLY; |
617ba13b | 335 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
336 | if (EXT4_SB(sb)->s_journal) |
337 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
338 | } |
339 | ||
2b2d6d01 TT |
340 | void ext4_warning(struct super_block *sb, const char *function, |
341 | const char *fmt, ...) | |
ac27a0ec DK |
342 | { |
343 | va_list args; | |
344 | ||
345 | va_start(args, fmt); | |
617ba13b | 346 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
347 | sb->s_id, function); |
348 | vprintk(fmt, args); | |
349 | printk("\n"); | |
350 | va_end(args); | |
351 | } | |
352 | ||
617ba13b | 353 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 354 | { |
617ba13b | 355 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 356 | |
617ba13b | 357 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
358 | return; |
359 | ||
46e665e9 | 360 | ext4_warning(sb, __func__, |
ac27a0ec DK |
361 | "updating to rev %d because of new feature flag, " |
362 | "running e2fsck is recommended", | |
617ba13b | 363 | EXT4_DYNAMIC_REV); |
ac27a0ec | 364 | |
617ba13b MC |
365 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
366 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
367 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
368 | /* leave es->s_feature_*compat flags alone */ |
369 | /* es->s_uuid will be set by e2fsck if empty */ | |
370 | ||
371 | /* | |
372 | * The rest of the superblock fields should be zero, and if not it | |
373 | * means they are likely already in use, so leave them alone. We | |
374 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
375 | */ | |
376 | } | |
377 | ||
378 | /* | |
379 | * Open the external journal device | |
380 | */ | |
617ba13b | 381 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
382 | { |
383 | struct block_device *bdev; | |
384 | char b[BDEVNAME_SIZE]; | |
385 | ||
386 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
387 | if (IS_ERR(bdev)) | |
388 | goto fail; | |
389 | return bdev; | |
390 | ||
391 | fail: | |
617ba13b | 392 | printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
393 | __bdevname(dev, b), PTR_ERR(bdev)); |
394 | return NULL; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Release the journal device | |
399 | */ | |
617ba13b | 400 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
401 | { |
402 | bd_release(bdev); | |
9a1c3542 | 403 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
404 | } |
405 | ||
617ba13b | 406 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
407 | { |
408 | struct block_device *bdev; | |
409 | int ret = -ENODEV; | |
410 | ||
411 | bdev = sbi->journal_bdev; | |
412 | if (bdev) { | |
617ba13b | 413 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
414 | sbi->journal_bdev = NULL; |
415 | } | |
416 | return ret; | |
417 | } | |
418 | ||
419 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
420 | { | |
617ba13b | 421 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
422 | } |
423 | ||
617ba13b | 424 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
425 | { |
426 | struct list_head *l; | |
427 | ||
428 | printk(KERN_ERR "sb orphan head is %d\n", | |
429 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
430 | ||
431 | printk(KERN_ERR "sb_info orphan list:\n"); | |
432 | list_for_each(l, &sbi->s_orphan) { | |
433 | struct inode *inode = orphan_list_entry(l); | |
434 | printk(KERN_ERR " " | |
435 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
436 | inode->i_sb->s_id, inode->i_ino, inode, | |
437 | inode->i_mode, inode->i_nlink, | |
438 | NEXT_ORPHAN(inode)); | |
439 | } | |
440 | } | |
441 | ||
2b2d6d01 | 442 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 443 | { |
617ba13b MC |
444 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
445 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 446 | int i, err; |
ac27a0ec | 447 | |
c9de560d | 448 | ext4_mb_release(sb); |
a86c6181 | 449 | ext4_ext_release(sb); |
617ba13b | 450 | ext4_xattr_put_super(sb); |
ef2cabf7 | 451 | err = jbd2_journal_destroy(sbi->s_journal); |
47b4a50b | 452 | sbi->s_journal = NULL; |
ef2cabf7 HK |
453 | if (err < 0) |
454 | ext4_abort(sb, __func__, "Couldn't clean up the journal"); | |
455 | ||
ac27a0ec | 456 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 457 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 458 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
617ba13b | 459 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 460 | } |
240799cd TT |
461 | if (sbi->s_proc) { |
462 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); | |
9f6200bb | 463 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 464 | } |
ac27a0ec DK |
465 | |
466 | for (i = 0; i < sbi->s_gdb_count; i++) | |
467 | brelse(sbi->s_group_desc[i]); | |
468 | kfree(sbi->s_group_desc); | |
772cb7c8 | 469 | kfree(sbi->s_flex_groups); |
ac27a0ec DK |
470 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
471 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
472 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 473 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
474 | brelse(sbi->s_sbh); |
475 | #ifdef CONFIG_QUOTA | |
476 | for (i = 0; i < MAXQUOTAS; i++) | |
477 | kfree(sbi->s_qf_names[i]); | |
478 | #endif | |
479 | ||
480 | /* Debugging code just in case the in-memory inode orphan list | |
481 | * isn't empty. The on-disk one can be non-empty if we've | |
482 | * detected an error and taken the fs readonly, but the | |
483 | * in-memory list had better be clean by this point. */ | |
484 | if (!list_empty(&sbi->s_orphan)) | |
485 | dump_orphan_list(sb, sbi); | |
486 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
487 | ||
f98393a6 | 488 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
489 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
490 | /* | |
491 | * Invalidate the journal device's buffers. We don't want them | |
492 | * floating about in memory - the physical journal device may | |
493 | * hotswapped, and it breaks the `ro-after' testing code. | |
494 | */ | |
495 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 496 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 497 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
498 | } |
499 | sb->s_fs_info = NULL; | |
500 | kfree(sbi); | |
501 | return; | |
502 | } | |
503 | ||
e18b890b | 504 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
505 | |
506 | /* | |
507 | * Called inside transaction, so use GFP_NOFS | |
508 | */ | |
617ba13b | 509 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 510 | { |
617ba13b | 511 | struct ext4_inode_info *ei; |
ac27a0ec | 512 | |
e6b4f8da | 513 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
514 | if (!ei) |
515 | return NULL; | |
03010a33 | 516 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
517 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
518 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 519 | #endif |
ac27a0ec | 520 | ei->vfs_inode.i_version = 1; |
91246c00 | 521 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 522 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
523 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
524 | spin_lock_init(&ei->i_prealloc_lock); | |
678aaf48 | 525 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
526 | ei->i_reserved_data_blocks = 0; |
527 | ei->i_reserved_meta_blocks = 0; | |
528 | ei->i_allocated_meta_blocks = 0; | |
529 | ei->i_delalloc_reserved_flag = 0; | |
530 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
ac27a0ec DK |
531 | return &ei->vfs_inode; |
532 | } | |
533 | ||
617ba13b | 534 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 535 | { |
9f7dd93d VA |
536 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
537 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
538 | EXT4_I(inode)); | |
539 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
540 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
541 | true); | |
542 | dump_stack(); | |
543 | } | |
617ba13b | 544 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
545 | } |
546 | ||
51cc5068 | 547 | static void init_once(void *foo) |
ac27a0ec | 548 | { |
617ba13b | 549 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 550 | |
a35afb83 | 551 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 552 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 553 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 554 | #endif |
0e855ac8 | 555 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 556 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
557 | } |
558 | ||
559 | static int init_inodecache(void) | |
560 | { | |
617ba13b MC |
561 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
562 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
563 | 0, (SLAB_RECLAIM_ACCOUNT| |
564 | SLAB_MEM_SPREAD), | |
20c2df83 | 565 | init_once); |
617ba13b | 566 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
567 | return -ENOMEM; |
568 | return 0; | |
569 | } | |
570 | ||
571 | static void destroy_inodecache(void) | |
572 | { | |
617ba13b | 573 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
574 | } |
575 | ||
617ba13b | 576 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 577 | { |
03010a33 | 578 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
579 | if (EXT4_I(inode)->i_acl && |
580 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
581 | posix_acl_release(EXT4_I(inode)->i_acl); | |
582 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
583 | } | |
584 | if (EXT4_I(inode)->i_default_acl && | |
585 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
586 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
587 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
588 | } |
589 | #endif | |
c2ea3fde | 590 | ext4_discard_preallocations(inode); |
678aaf48 JK |
591 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, |
592 | &EXT4_I(inode)->jinode); | |
ac27a0ec DK |
593 | } |
594 | ||
2b2d6d01 TT |
595 | static inline void ext4_show_quota_options(struct seq_file *seq, |
596 | struct super_block *sb) | |
ac27a0ec DK |
597 | { |
598 | #if defined(CONFIG_QUOTA) | |
617ba13b | 599 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
600 | |
601 | if (sbi->s_jquota_fmt) | |
602 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 603 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
604 | |
605 | if (sbi->s_qf_names[USRQUOTA]) | |
606 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
607 | ||
608 | if (sbi->s_qf_names[GRPQUOTA]) | |
609 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
610 | ||
617ba13b | 611 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
612 | seq_puts(seq, ",usrquota"); |
613 | ||
617ba13b | 614 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
615 | seq_puts(seq, ",grpquota"); |
616 | #endif | |
617 | } | |
618 | ||
d9c9bef1 MS |
619 | /* |
620 | * Show an option if | |
621 | * - it's set to a non-default value OR | |
622 | * - if the per-sb default is different from the global default | |
623 | */ | |
617ba13b | 624 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 625 | { |
aa22df2c AK |
626 | int def_errors; |
627 | unsigned long def_mount_opts; | |
ac27a0ec | 628 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
629 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
630 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
631 | |
632 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 633 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
634 | |
635 | if (sbi->s_sb_block != 1) | |
636 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
637 | if (test_opt(sb, MINIX_DF)) | |
638 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 639 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
640 | seq_puts(seq, ",grpid"); |
641 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
642 | seq_puts(seq, ",nogrpid"); | |
643 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
644 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
645 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
646 | } | |
647 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
648 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
649 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
650 | } | |
bb4f397a | 651 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 652 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
653 | def_errors == EXT4_ERRORS_CONTINUE) { |
654 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
655 | } |
656 | } | |
aa22df2c | 657 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 658 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 659 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 660 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 661 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 662 | seq_puts(seq, ",nouid32"); |
aa22df2c | 663 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
664 | seq_puts(seq, ",debug"); |
665 | if (test_opt(sb, OLDALLOC)) | |
666 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 667 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
668 | if (test_opt(sb, XATTR_USER) && |
669 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
670 | seq_puts(seq, ",user_xattr"); |
671 | if (!test_opt(sb, XATTR_USER) && | |
672 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
673 | seq_puts(seq, ",nouser_xattr"); | |
674 | } | |
675 | #endif | |
03010a33 | 676 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 677 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
678 | seq_puts(seq, ",acl"); |
679 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
680 | seq_puts(seq, ",noacl"); | |
681 | #endif | |
682 | if (!test_opt(sb, RESERVATION)) | |
683 | seq_puts(seq, ",noreservation"); | |
684 | if (sbi->s_commit_interval) { | |
685 | seq_printf(seq, ",commit=%u", | |
686 | (unsigned) (sbi->s_commit_interval / HZ)); | |
687 | } | |
571640ca ES |
688 | /* |
689 | * We're changing the default of barrier mount option, so | |
690 | * let's always display its mount state so it's clear what its | |
691 | * status is. | |
692 | */ | |
693 | seq_puts(seq, ",barrier="); | |
694 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
695 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
696 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
697 | if (test_opt(sb, NOBH)) |
698 | seq_puts(seq, ",nobh"); | |
699 | if (!test_opt(sb, EXTENTS)) | |
700 | seq_puts(seq, ",noextents"); | |
25ec56b5 JNC |
701 | if (test_opt(sb, I_VERSION)) |
702 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
703 | if (!test_opt(sb, DELALLOC)) |
704 | seq_puts(seq, ",nodelalloc"); | |
705 | ||
ac27a0ec | 706 | |
cb45bbe4 MS |
707 | if (sbi->s_stripe) |
708 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
709 | /* |
710 | * journal mode get enabled in different ways | |
711 | * So just print the value even if we didn't specify it | |
712 | */ | |
617ba13b | 713 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 714 | seq_puts(seq, ",data=journal"); |
617ba13b | 715 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 716 | seq_puts(seq, ",data=ordered"); |
617ba13b | 717 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
718 | seq_puts(seq, ",data=writeback"); |
719 | ||
240799cd TT |
720 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
721 | seq_printf(seq, ",inode_readahead_blks=%u", | |
722 | sbi->s_inode_readahead_blks); | |
723 | ||
5bf5683a HK |
724 | if (test_opt(sb, DATA_ERR_ABORT)) |
725 | seq_puts(seq, ",data_err=abort"); | |
726 | ||
617ba13b | 727 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
728 | return 0; |
729 | } | |
730 | ||
731 | ||
1b961ac0 CH |
732 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
733 | u64 ino, u32 generation) | |
ac27a0ec | 734 | { |
ac27a0ec | 735 | struct inode *inode; |
ac27a0ec | 736 | |
617ba13b | 737 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 738 | return ERR_PTR(-ESTALE); |
617ba13b | 739 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
740 | return ERR_PTR(-ESTALE); |
741 | ||
742 | /* iget isn't really right if the inode is currently unallocated!! | |
743 | * | |
617ba13b | 744 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
745 | * deleted, so we should be safe. |
746 | * | |
747 | * Currently we don't know the generation for parent directory, so | |
748 | * a generation of 0 means "accept any" | |
749 | */ | |
1d1fe1ee DH |
750 | inode = ext4_iget(sb, ino); |
751 | if (IS_ERR(inode)) | |
752 | return ERR_CAST(inode); | |
753 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
754 | iput(inode); |
755 | return ERR_PTR(-ESTALE); | |
756 | } | |
1b961ac0 CH |
757 | |
758 | return inode; | |
759 | } | |
760 | ||
761 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
762 | int fh_len, int fh_type) | |
763 | { | |
764 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
765 | ext4_nfs_get_inode); | |
766 | } | |
767 | ||
768 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
769 | int fh_len, int fh_type) | |
770 | { | |
771 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
772 | ext4_nfs_get_inode); | |
ac27a0ec DK |
773 | } |
774 | ||
775 | #ifdef CONFIG_QUOTA | |
af5bc92d | 776 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 777 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 778 | |
617ba13b MC |
779 | static int ext4_dquot_initialize(struct inode *inode, int type); |
780 | static int ext4_dquot_drop(struct inode *inode); | |
781 | static int ext4_write_dquot(struct dquot *dquot); | |
782 | static int ext4_acquire_dquot(struct dquot *dquot); | |
783 | static int ext4_release_dquot(struct dquot *dquot); | |
784 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
785 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
786 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
787 | char *path, int remount); | |
617ba13b MC |
788 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
789 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 790 | size_t len, loff_t off); |
617ba13b | 791 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
792 | const char *data, size_t len, loff_t off); |
793 | ||
617ba13b MC |
794 | static struct dquot_operations ext4_quota_operations = { |
795 | .initialize = ext4_dquot_initialize, | |
796 | .drop = ext4_dquot_drop, | |
ac27a0ec DK |
797 | .alloc_space = dquot_alloc_space, |
798 | .alloc_inode = dquot_alloc_inode, | |
799 | .free_space = dquot_free_space, | |
800 | .free_inode = dquot_free_inode, | |
801 | .transfer = dquot_transfer, | |
617ba13b MC |
802 | .write_dquot = ext4_write_dquot, |
803 | .acquire_dquot = ext4_acquire_dquot, | |
804 | .release_dquot = ext4_release_dquot, | |
805 | .mark_dirty = ext4_mark_dquot_dirty, | |
806 | .write_info = ext4_write_info | |
ac27a0ec DK |
807 | }; |
808 | ||
617ba13b MC |
809 | static struct quotactl_ops ext4_qctl_operations = { |
810 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
811 | .quota_off = vfs_quota_off, |
812 | .quota_sync = vfs_quota_sync, | |
813 | .get_info = vfs_get_dqinfo, | |
814 | .set_info = vfs_set_dqinfo, | |
815 | .get_dqblk = vfs_get_dqblk, | |
816 | .set_dqblk = vfs_set_dqblk | |
817 | }; | |
818 | #endif | |
819 | ||
ee9b6d61 | 820 | static const struct super_operations ext4_sops = { |
617ba13b MC |
821 | .alloc_inode = ext4_alloc_inode, |
822 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
823 | .write_inode = ext4_write_inode, |
824 | .dirty_inode = ext4_dirty_inode, | |
825 | .delete_inode = ext4_delete_inode, | |
826 | .put_super = ext4_put_super, | |
827 | .write_super = ext4_write_super, | |
828 | .sync_fs = ext4_sync_fs, | |
829 | .write_super_lockfs = ext4_write_super_lockfs, | |
830 | .unlockfs = ext4_unlockfs, | |
831 | .statfs = ext4_statfs, | |
832 | .remount_fs = ext4_remount, | |
833 | .clear_inode = ext4_clear_inode, | |
834 | .show_options = ext4_show_options, | |
ac27a0ec | 835 | #ifdef CONFIG_QUOTA |
617ba13b MC |
836 | .quota_read = ext4_quota_read, |
837 | .quota_write = ext4_quota_write, | |
ac27a0ec DK |
838 | #endif |
839 | }; | |
840 | ||
39655164 | 841 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
842 | .fh_to_dentry = ext4_fh_to_dentry, |
843 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 844 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
845 | }; |
846 | ||
847 | enum { | |
848 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
849 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 850 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec DK |
851 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
852 | Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, | |
853 | Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, | |
818d276c | 854 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 855 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
5bf5683a | 856 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec DK |
857 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
858 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
859 | Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, | |
25ec56b5 | 860 | Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, |
01436ef2 | 861 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
240799cd | 862 | Opt_inode_readahead_blks |
ac27a0ec DK |
863 | }; |
864 | ||
a447c093 | 865 | static const match_table_t tokens = { |
ac27a0ec DK |
866 | {Opt_bsd_df, "bsddf"}, |
867 | {Opt_minix_df, "minixdf"}, | |
868 | {Opt_grpid, "grpid"}, | |
869 | {Opt_grpid, "bsdgroups"}, | |
870 | {Opt_nogrpid, "nogrpid"}, | |
871 | {Opt_nogrpid, "sysvgroups"}, | |
872 | {Opt_resgid, "resgid=%u"}, | |
873 | {Opt_resuid, "resuid=%u"}, | |
874 | {Opt_sb, "sb=%u"}, | |
875 | {Opt_err_cont, "errors=continue"}, | |
876 | {Opt_err_panic, "errors=panic"}, | |
877 | {Opt_err_ro, "errors=remount-ro"}, | |
878 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
879 | {Opt_debug, "debug"}, |
880 | {Opt_oldalloc, "oldalloc"}, | |
881 | {Opt_orlov, "orlov"}, | |
882 | {Opt_user_xattr, "user_xattr"}, | |
883 | {Opt_nouser_xattr, "nouser_xattr"}, | |
884 | {Opt_acl, "acl"}, | |
885 | {Opt_noacl, "noacl"}, | |
886 | {Opt_reservation, "reservation"}, | |
887 | {Opt_noreservation, "noreservation"}, | |
888 | {Opt_noload, "noload"}, | |
889 | {Opt_nobh, "nobh"}, | |
890 | {Opt_bh, "bh"}, | |
891 | {Opt_commit, "commit=%u"}, | |
892 | {Opt_journal_update, "journal=update"}, | |
893 | {Opt_journal_inum, "journal=%u"}, | |
894 | {Opt_journal_dev, "journal_dev=%u"}, | |
818d276c GS |
895 | {Opt_journal_checksum, "journal_checksum"}, |
896 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
897 | {Opt_abort, "abort"}, |
898 | {Opt_data_journal, "data=journal"}, | |
899 | {Opt_data_ordered, "data=ordered"}, | |
900 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
901 | {Opt_data_err_abort, "data_err=abort"}, |
902 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
903 | {Opt_offusrjquota, "usrjquota="}, |
904 | {Opt_usrjquota, "usrjquota=%s"}, | |
905 | {Opt_offgrpjquota, "grpjquota="}, | |
906 | {Opt_grpjquota, "grpjquota=%s"}, | |
907 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
908 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
909 | {Opt_grpquota, "grpquota"}, | |
910 | {Opt_noquota, "noquota"}, | |
911 | {Opt_quota, "quota"}, | |
912 | {Opt_usrquota, "usrquota"}, | |
913 | {Opt_barrier, "barrier=%u"}, | |
a86c6181 | 914 | {Opt_extents, "extents"}, |
1e2462f9 | 915 | {Opt_noextents, "noextents"}, |
25ec56b5 | 916 | {Opt_i_version, "i_version"}, |
c9de560d | 917 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 918 | {Opt_resize, "resize"}, |
64769240 | 919 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 920 | {Opt_nodelalloc, "nodelalloc"}, |
240799cd | 921 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
f3f12faa | 922 | {Opt_err, NULL}, |
ac27a0ec DK |
923 | }; |
924 | ||
617ba13b | 925 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 926 | { |
617ba13b | 927 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
928 | char *options = (char *) *data; |
929 | ||
930 | if (!options || strncmp(options, "sb=", 3) != 0) | |
931 | return 1; /* Default location */ | |
932 | options += 3; | |
617ba13b | 933 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
934 | sb_block = simple_strtoul(options, &options, 0); |
935 | if (*options && *options != ',') { | |
4776004f | 936 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
937 | (char *) *data); |
938 | return 1; | |
939 | } | |
940 | if (*options == ',') | |
941 | options++; | |
942 | *data = (void *) options; | |
943 | return sb_block; | |
944 | } | |
945 | ||
2b2d6d01 TT |
946 | static int parse_options(char *options, struct super_block *sb, |
947 | unsigned int *inum, unsigned long *journal_devnum, | |
948 | ext4_fsblk_t *n_blocks_count, int is_remount) | |
ac27a0ec | 949 | { |
617ba13b | 950 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 951 | char *p; |
ac27a0ec DK |
952 | substring_t args[MAX_OPT_ARGS]; |
953 | int data_opt = 0; | |
954 | int option; | |
955 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 956 | int qtype, qfmt; |
ac27a0ec DK |
957 | char *qname; |
958 | #endif | |
c07651b5 | 959 | ext4_fsblk_t last_block; |
ac27a0ec DK |
960 | |
961 | if (!options) | |
962 | return 1; | |
963 | ||
2b2d6d01 | 964 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
965 | int token; |
966 | if (!*p) | |
967 | continue; | |
968 | ||
969 | token = match_token(p, tokens, args); | |
970 | switch (token) { | |
971 | case Opt_bsd_df: | |
2b2d6d01 | 972 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
973 | break; |
974 | case Opt_minix_df: | |
2b2d6d01 | 975 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
976 | break; |
977 | case Opt_grpid: | |
2b2d6d01 | 978 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
979 | break; |
980 | case Opt_nogrpid: | |
2b2d6d01 | 981 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
982 | break; |
983 | case Opt_resuid: | |
984 | if (match_int(&args[0], &option)) | |
985 | return 0; | |
986 | sbi->s_resuid = option; | |
987 | break; | |
988 | case Opt_resgid: | |
989 | if (match_int(&args[0], &option)) | |
990 | return 0; | |
991 | sbi->s_resgid = option; | |
992 | break; | |
993 | case Opt_sb: | |
994 | /* handled by get_sb_block() instead of here */ | |
995 | /* *sb_block = match_int(&args[0]); */ | |
996 | break; | |
997 | case Opt_err_panic: | |
2b2d6d01 TT |
998 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
999 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1000 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1001 | break; |
1002 | case Opt_err_ro: | |
2b2d6d01 TT |
1003 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1004 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1005 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1006 | break; |
1007 | case Opt_err_cont: | |
2b2d6d01 TT |
1008 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1009 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1010 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1011 | break; |
1012 | case Opt_nouid32: | |
2b2d6d01 | 1013 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1014 | break; |
ac27a0ec | 1015 | case Opt_debug: |
2b2d6d01 | 1016 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1017 | break; |
1018 | case Opt_oldalloc: | |
2b2d6d01 | 1019 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1020 | break; |
1021 | case Opt_orlov: | |
2b2d6d01 | 1022 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1023 | break; |
03010a33 | 1024 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1025 | case Opt_user_xattr: |
2b2d6d01 | 1026 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1027 | break; |
1028 | case Opt_nouser_xattr: | |
2b2d6d01 | 1029 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1030 | break; |
1031 | #else | |
1032 | case Opt_user_xattr: | |
1033 | case Opt_nouser_xattr: | |
4776004f TT |
1034 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1035 | "not supported\n"); | |
ac27a0ec DK |
1036 | break; |
1037 | #endif | |
03010a33 | 1038 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1039 | case Opt_acl: |
1040 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1041 | break; | |
1042 | case Opt_noacl: | |
1043 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1044 | break; | |
1045 | #else | |
1046 | case Opt_acl: | |
1047 | case Opt_noacl: | |
4776004f TT |
1048 | printk(KERN_ERR "EXT4 (no)acl options " |
1049 | "not supported\n"); | |
ac27a0ec DK |
1050 | break; |
1051 | #endif | |
1052 | case Opt_reservation: | |
1053 | set_opt(sbi->s_mount_opt, RESERVATION); | |
1054 | break; | |
1055 | case Opt_noreservation: | |
1056 | clear_opt(sbi->s_mount_opt, RESERVATION); | |
1057 | break; | |
1058 | case Opt_journal_update: | |
1059 | /* @@@ FIXME */ | |
1060 | /* Eventually we will want to be able to create | |
1061 | a journal file here. For now, only allow the | |
1062 | user to specify an existing inode to be the | |
1063 | journal file. */ | |
1064 | if (is_remount) { | |
617ba13b | 1065 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1066 | "journal on remount\n"); |
1067 | return 0; | |
1068 | } | |
2b2d6d01 | 1069 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec DK |
1070 | break; |
1071 | case Opt_journal_inum: | |
1072 | if (is_remount) { | |
617ba13b | 1073 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1074 | "journal on remount\n"); |
1075 | return 0; | |
1076 | } | |
1077 | if (match_int(&args[0], &option)) | |
1078 | return 0; | |
1079 | *inum = option; | |
1080 | break; | |
1081 | case Opt_journal_dev: | |
1082 | if (is_remount) { | |
617ba13b | 1083 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1084 | "journal on remount\n"); |
1085 | return 0; | |
1086 | } | |
1087 | if (match_int(&args[0], &option)) | |
1088 | return 0; | |
1089 | *journal_devnum = option; | |
1090 | break; | |
818d276c GS |
1091 | case Opt_journal_checksum: |
1092 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1093 | break; | |
1094 | case Opt_journal_async_commit: | |
1095 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1096 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1097 | break; | |
ac27a0ec | 1098 | case Opt_noload: |
2b2d6d01 | 1099 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1100 | break; |
1101 | case Opt_commit: | |
1102 | if (match_int(&args[0], &option)) | |
1103 | return 0; | |
1104 | if (option < 0) | |
1105 | return 0; | |
1106 | if (option == 0) | |
cd02ff0b | 1107 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1108 | sbi->s_commit_interval = HZ * option; |
1109 | break; | |
1110 | case Opt_data_journal: | |
617ba13b | 1111 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1112 | goto datacheck; |
1113 | case Opt_data_ordered: | |
617ba13b | 1114 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1115 | goto datacheck; |
1116 | case Opt_data_writeback: | |
617ba13b | 1117 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1118 | datacheck: |
1119 | if (is_remount) { | |
617ba13b | 1120 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1121 | != data_opt) { |
1122 | printk(KERN_ERR | |
617ba13b | 1123 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1124 | "mode on remount\n"); |
1125 | return 0; | |
1126 | } | |
1127 | } else { | |
617ba13b | 1128 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1129 | sbi->s_mount_opt |= data_opt; |
1130 | } | |
1131 | break; | |
5bf5683a HK |
1132 | case Opt_data_err_abort: |
1133 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1134 | break; | |
1135 | case Opt_data_err_ignore: | |
1136 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1137 | break; | |
ac27a0ec DK |
1138 | #ifdef CONFIG_QUOTA |
1139 | case Opt_usrjquota: | |
1140 | qtype = USRQUOTA; | |
1141 | goto set_qf_name; | |
1142 | case Opt_grpjquota: | |
1143 | qtype = GRPQUOTA; | |
1144 | set_qf_name: | |
dfc5d03f JK |
1145 | if ((sb_any_quota_enabled(sb) || |
1146 | sb_any_quota_suspended(sb)) && | |
1147 | !sbi->s_qf_names[qtype]) { | |
ac27a0ec | 1148 | printk(KERN_ERR |
4776004f TT |
1149 | "EXT4-fs: Cannot change journaled " |
1150 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1151 | return 0; |
1152 | } | |
1153 | qname = match_strdup(&args[0]); | |
1154 | if (!qname) { | |
1155 | printk(KERN_ERR | |
617ba13b | 1156 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1157 | "storing quotafile name.\n"); |
1158 | return 0; | |
1159 | } | |
1160 | if (sbi->s_qf_names[qtype] && | |
1161 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1162 | printk(KERN_ERR | |
617ba13b | 1163 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1164 | "specified.\n", QTYPE2NAME(qtype)); |
1165 | kfree(qname); | |
1166 | return 0; | |
1167 | } | |
1168 | sbi->s_qf_names[qtype] = qname; | |
1169 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1170 | printk(KERN_ERR | |
617ba13b | 1171 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1172 | "filesystem root.\n"); |
1173 | kfree(sbi->s_qf_names[qtype]); | |
1174 | sbi->s_qf_names[qtype] = NULL; | |
1175 | return 0; | |
1176 | } | |
1177 | set_opt(sbi->s_mount_opt, QUOTA); | |
1178 | break; | |
1179 | case Opt_offusrjquota: | |
1180 | qtype = USRQUOTA; | |
1181 | goto clear_qf_name; | |
1182 | case Opt_offgrpjquota: | |
1183 | qtype = GRPQUOTA; | |
1184 | clear_qf_name: | |
dfc5d03f JK |
1185 | if ((sb_any_quota_enabled(sb) || |
1186 | sb_any_quota_suspended(sb)) && | |
1187 | sbi->s_qf_names[qtype]) { | |
617ba13b | 1188 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1189 | "journaled quota options when " |
ac27a0ec DK |
1190 | "quota turned on.\n"); |
1191 | return 0; | |
1192 | } | |
1193 | /* | |
1194 | * The space will be released later when all options | |
1195 | * are confirmed to be correct | |
1196 | */ | |
1197 | sbi->s_qf_names[qtype] = NULL; | |
1198 | break; | |
1199 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1200 | qfmt = QFMT_VFS_OLD; |
1201 | goto set_qf_format; | |
ac27a0ec | 1202 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1203 | qfmt = QFMT_VFS_V0; |
1204 | set_qf_format: | |
1205 | if ((sb_any_quota_enabled(sb) || | |
1206 | sb_any_quota_suspended(sb)) && | |
1207 | sbi->s_jquota_fmt != qfmt) { | |
1208 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1209 | "journaled quota options when " | |
1210 | "quota turned on.\n"); | |
1211 | return 0; | |
1212 | } | |
1213 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1214 | break; |
1215 | case Opt_quota: | |
1216 | case Opt_usrquota: | |
1217 | set_opt(sbi->s_mount_opt, QUOTA); | |
1218 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1219 | break; | |
1220 | case Opt_grpquota: | |
1221 | set_opt(sbi->s_mount_opt, QUOTA); | |
1222 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1223 | break; | |
1224 | case Opt_noquota: | |
1225 | if (sb_any_quota_enabled(sb)) { | |
617ba13b | 1226 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1227 | "options when quota turned on.\n"); |
1228 | return 0; | |
1229 | } | |
1230 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1231 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1232 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1233 | break; | |
1234 | #else | |
1235 | case Opt_quota: | |
1236 | case Opt_usrquota: | |
1237 | case Opt_grpquota: | |
cd59e7b9 JK |
1238 | printk(KERN_ERR |
1239 | "EXT4-fs: quota options not supported.\n"); | |
1240 | break; | |
ac27a0ec DK |
1241 | case Opt_usrjquota: |
1242 | case Opt_grpjquota: | |
1243 | case Opt_offusrjquota: | |
1244 | case Opt_offgrpjquota: | |
1245 | case Opt_jqfmt_vfsold: | |
1246 | case Opt_jqfmt_vfsv0: | |
1247 | printk(KERN_ERR | |
cd59e7b9 | 1248 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1249 | "supported.\n"); |
1250 | break; | |
1251 | case Opt_noquota: | |
1252 | break; | |
1253 | #endif | |
1254 | case Opt_abort: | |
1255 | set_opt(sbi->s_mount_opt, ABORT); | |
1256 | break; | |
1257 | case Opt_barrier: | |
1258 | if (match_int(&args[0], &option)) | |
1259 | return 0; | |
1260 | if (option) | |
1261 | set_opt(sbi->s_mount_opt, BARRIER); | |
1262 | else | |
1263 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1264 | break; | |
1265 | case Opt_ignore: | |
1266 | break; | |
1267 | case Opt_resize: | |
1268 | if (!is_remount) { | |
617ba13b | 1269 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1270 | "for remount\n"); |
1271 | return 0; | |
1272 | } | |
1273 | if (match_int(&args[0], &option) != 0) | |
1274 | return 0; | |
1275 | *n_blocks_count = option; | |
1276 | break; | |
1277 | case Opt_nobh: | |
1278 | set_opt(sbi->s_mount_opt, NOBH); | |
1279 | break; | |
1280 | case Opt_bh: | |
1281 | clear_opt(sbi->s_mount_opt, NOBH); | |
1282 | break; | |
a86c6181 | 1283 | case Opt_extents: |
e4079a11 ES |
1284 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, |
1285 | EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
1286 | ext4_warning(sb, __func__, | |
1287 | "extents feature not enabled " | |
1288 | "on this filesystem, use tune2fs\n"); | |
1289 | return 0; | |
1290 | } | |
2b2d6d01 | 1291 | set_opt(sbi->s_mount_opt, EXTENTS); |
a86c6181 | 1292 | break; |
1e2462f9 | 1293 | case Opt_noextents: |
c07651b5 AK |
1294 | /* |
1295 | * When e2fsprogs support resizing an already existing | |
1296 | * ext3 file system to greater than 2**32 we need to | |
1297 | * add support to block allocator to handle growing | |
1298 | * already existing block mapped inode so that blocks | |
1299 | * allocated for them fall within 2**32 | |
1300 | */ | |
1301 | last_block = ext4_blocks_count(sbi->s_es) - 1; | |
1302 | if (last_block > 0xffffffffULL) { | |
1303 | printk(KERN_ERR "EXT4-fs: Filesystem too " | |
1304 | "large to mount with " | |
1305 | "-o noextents options\n"); | |
1306 | return 0; | |
1307 | } | |
2b2d6d01 | 1308 | clear_opt(sbi->s_mount_opt, EXTENTS); |
1e2462f9 | 1309 | break; |
25ec56b5 JNC |
1310 | case Opt_i_version: |
1311 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1312 | sb->s_flags |= MS_I_VERSION; | |
1313 | break; | |
dd919b98 AK |
1314 | case Opt_nodelalloc: |
1315 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1316 | break; | |
c9de560d AT |
1317 | case Opt_stripe: |
1318 | if (match_int(&args[0], &option)) | |
1319 | return 0; | |
1320 | if (option < 0) | |
1321 | return 0; | |
1322 | sbi->s_stripe = option; | |
1323 | break; | |
64769240 AT |
1324 | case Opt_delalloc: |
1325 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1326 | break; | |
240799cd TT |
1327 | case Opt_inode_readahead_blks: |
1328 | if (match_int(&args[0], &option)) | |
1329 | return 0; | |
1330 | if (option < 0 || option > (1 << 30)) | |
1331 | return 0; | |
1332 | sbi->s_inode_readahead_blks = option; | |
1333 | break; | |
ac27a0ec | 1334 | default: |
2b2d6d01 TT |
1335 | printk(KERN_ERR |
1336 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1337 | "or missing value\n", p); | |
ac27a0ec DK |
1338 | return 0; |
1339 | } | |
1340 | } | |
1341 | #ifdef CONFIG_QUOTA | |
1342 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1343 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1344 | sbi->s_qf_names[USRQUOTA]) |
1345 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1346 | ||
617ba13b | 1347 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1348 | sbi->s_qf_names[GRPQUOTA]) |
1349 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1350 | ||
1351 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1352 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1353 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1354 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1355 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1356 | "format mixing.\n"); |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1361 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1362 | "not specified.\n"); |
1363 | return 0; | |
1364 | } | |
1365 | } else { | |
1366 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1367 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1368 | "specified with no journaling " | |
ac27a0ec DK |
1369 | "enabled.\n"); |
1370 | return 0; | |
1371 | } | |
1372 | } | |
1373 | #endif | |
1374 | return 1; | |
1375 | } | |
1376 | ||
617ba13b | 1377 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1378 | int read_only) |
1379 | { | |
617ba13b | 1380 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1381 | int res = 0; |
1382 | ||
617ba13b | 1383 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1384 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1385 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1386 | res = MS_RDONLY; |
1387 | } | |
1388 | if (read_only) | |
1389 | return res; | |
617ba13b | 1390 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1391 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1392 | "running e2fsck is recommended\n"); | |
617ba13b | 1393 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1394 | printk(KERN_WARNING |
1395 | "EXT4-fs warning: mounting fs with errors, " | |
1396 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1397 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1398 | le16_to_cpu(es->s_mnt_count) >= | |
1399 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1400 | printk(KERN_WARNING |
1401 | "EXT4-fs warning: maximal mount count reached, " | |
1402 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1403 | else if (le32_to_cpu(es->s_checkinterval) && |
1404 | (le32_to_cpu(es->s_lastcheck) + | |
1405 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1406 | printk(KERN_WARNING |
1407 | "EXT4-fs warning: checktime reached, " | |
1408 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1409 | #if 0 |
1410 | /* @@@ We _will_ want to clear the valid bit if we find | |
63f57933 AM |
1411 | * inconsistencies, to force a fsck at reboot. But for |
1412 | * a plain journaled filesystem we can keep it set as | |
1413 | * valid forever! :) | |
1414 | */ | |
216c34b2 | 1415 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec DK |
1416 | #endif |
1417 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) | |
617ba13b | 1418 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1419 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1420 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b MC |
1421 | ext4_update_dynamic_rev(sb); |
1422 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1423 | |
617ba13b | 1424 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1425 | if (test_opt(sb, DEBUG)) |
617ba13b | 1426 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " |
ac27a0ec DK |
1427 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1428 | sb->s_blocksize, | |
1429 | sbi->s_groups_count, | |
617ba13b MC |
1430 | EXT4_BLOCKS_PER_GROUP(sb), |
1431 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1432 | sbi->s_mount_opt); |
1433 | ||
05496769 TT |
1434 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", |
1435 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1436 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
ac27a0ec DK |
1437 | return res; |
1438 | } | |
1439 | ||
772cb7c8 JS |
1440 | static int ext4_fill_flex_info(struct super_block *sb) |
1441 | { | |
1442 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1443 | struct ext4_group_desc *gdp = NULL; | |
1444 | struct buffer_head *bh; | |
1445 | ext4_group_t flex_group_count; | |
1446 | ext4_group_t flex_group; | |
1447 | int groups_per_flex = 0; | |
772cb7c8 JS |
1448 | int i; |
1449 | ||
1450 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1451 | sbi->s_log_groups_per_flex = 0; | |
1452 | return 1; | |
1453 | } | |
1454 | ||
1455 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1456 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1457 | ||
c62a11fd FB |
1458 | /* We allocate both existing and potentially added groups */ |
1459 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1460 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1461 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
ec05e868 | 1462 | sbi->s_flex_groups = kzalloc(flex_group_count * |
772cb7c8 JS |
1463 | sizeof(struct flex_groups), GFP_KERNEL); |
1464 | if (sbi->s_flex_groups == NULL) { | |
ec05e868 LZ |
1465 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
1466 | "%lu flex groups\n", flex_group_count); | |
772cb7c8 JS |
1467 | goto failed; |
1468 | } | |
772cb7c8 | 1469 | |
772cb7c8 JS |
1470 | for (i = 0; i < sbi->s_groups_count; i++) { |
1471 | gdp = ext4_get_group_desc(sb, i, &bh); | |
1472 | ||
1473 | flex_group = ext4_flex_group(sbi, i); | |
1474 | sbi->s_flex_groups[flex_group].free_inodes += | |
1475 | le16_to_cpu(gdp->bg_free_inodes_count); | |
1476 | sbi->s_flex_groups[flex_group].free_blocks += | |
1477 | le16_to_cpu(gdp->bg_free_blocks_count); | |
1478 | } | |
1479 | ||
1480 | return 1; | |
1481 | failed: | |
1482 | return 0; | |
1483 | } | |
1484 | ||
717d50e4 AD |
1485 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1486 | struct ext4_group_desc *gdp) | |
1487 | { | |
1488 | __u16 crc = 0; | |
1489 | ||
1490 | if (sbi->s_es->s_feature_ro_compat & | |
1491 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1492 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1493 | __le32 le_group = cpu_to_le32(block_group); | |
1494 | ||
1495 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1496 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1497 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1498 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1499 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1500 | if ((sbi->s_es->s_feature_incompat & | |
1501 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1502 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1503 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1504 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1505 | offset); | |
1506 | } | |
1507 | ||
1508 | return cpu_to_le16(crc); | |
1509 | } | |
1510 | ||
1511 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1512 | struct ext4_group_desc *gdp) | |
1513 | { | |
1514 | if ((sbi->s_es->s_feature_ro_compat & | |
1515 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1516 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1517 | return 0; | |
1518 | ||
1519 | return 1; | |
1520 | } | |
1521 | ||
ac27a0ec | 1522 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1523 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1524 | { |
617ba13b MC |
1525 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1526 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1527 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1528 | ext4_fsblk_t block_bitmap; |
1529 | ext4_fsblk_t inode_bitmap; | |
1530 | ext4_fsblk_t inode_table; | |
ce421581 | 1531 | int flexbg_flag = 0; |
fd2d4291 | 1532 | ext4_group_t i; |
ac27a0ec | 1533 | |
ce421581 JS |
1534 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1535 | flexbg_flag = 1; | |
1536 | ||
af5bc92d | 1537 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1538 | |
197cd65a AM |
1539 | for (i = 0; i < sbi->s_groups_count; i++) { |
1540 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1541 | ||
ce421581 | 1542 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1543 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1544 | else |
1545 | last_block = first_block + | |
617ba13b | 1546 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1547 | |
8fadc143 | 1548 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1549 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 JB |
1550 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1551 | "Block bitmap for group %lu not in group " | |
5128273a | 1552 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1553 | return 0; |
1554 | } | |
8fadc143 | 1555 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1556 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 JB |
1557 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1558 | "Inode bitmap for group %lu not in group " | |
5128273a | 1559 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1560 | return 0; |
1561 | } | |
8fadc143 | 1562 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1563 | if (inode_table < first_block || |
2b2d6d01 | 1564 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 JB |
1565 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1566 | "Inode table for group %lu not in group " | |
5128273a | 1567 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1568 | return 0; |
1569 | } | |
b5f10eed | 1570 | spin_lock(sb_bgl_lock(sbi, i)); |
717d50e4 | 1571 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 JB |
1572 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
1573 | "Checksum for group %lu failed (%u!=%u)\n", | |
1574 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
1575 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c LZ |
1576 | if (!(sb->s_flags & MS_RDONLY)) { |
1577 | spin_unlock(sb_bgl_lock(sbi, i)); | |
8a266467 | 1578 | return 0; |
7ee1ec4c | 1579 | } |
717d50e4 | 1580 | } |
b5f10eed | 1581 | spin_unlock(sb_bgl_lock(sbi, i)); |
ce421581 JS |
1582 | if (!flexbg_flag) |
1583 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1584 | } |
1585 | ||
bd81d8ee | 1586 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
2b2d6d01 | 1587 | sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1588 | return 1; |
1589 | } | |
1590 | ||
617ba13b | 1591 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1592 | * the superblock) which were deleted from all directories, but held open by |
1593 | * a process at the time of a crash. We walk the list and try to delete these | |
1594 | * inodes at recovery time (only with a read-write filesystem). | |
1595 | * | |
1596 | * In order to keep the orphan inode chain consistent during traversal (in | |
1597 | * case of crash during recovery), we link each inode into the superblock | |
1598 | * orphan list_head and handle it the same way as an inode deletion during | |
1599 | * normal operation (which journals the operations for us). | |
1600 | * | |
1601 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1602 | * accidentally point at an in-use or already deleted inode. The worst that | |
1603 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1604 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1605 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1606 | * inode cleanup for us, so we can safely abort without any further action. | |
1607 | */ | |
2b2d6d01 TT |
1608 | static void ext4_orphan_cleanup(struct super_block *sb, |
1609 | struct ext4_super_block *es) | |
ac27a0ec DK |
1610 | { |
1611 | unsigned int s_flags = sb->s_flags; | |
1612 | int nr_orphans = 0, nr_truncates = 0; | |
1613 | #ifdef CONFIG_QUOTA | |
1614 | int i; | |
1615 | #endif | |
1616 | if (!es->s_last_orphan) { | |
1617 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1618 | return; | |
1619 | } | |
1620 | ||
a8f48a95 ES |
1621 | if (bdev_read_only(sb->s_bdev)) { |
1622 | printk(KERN_ERR "EXT4-fs: write access " | |
1623 | "unavailable, skipping orphan cleanup.\n"); | |
1624 | return; | |
1625 | } | |
1626 | ||
617ba13b | 1627 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1628 | if (es->s_last_orphan) |
1629 | jbd_debug(1, "Errors on filesystem, " | |
1630 | "clearing orphan list.\n"); | |
1631 | es->s_last_orphan = 0; | |
1632 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1633 | return; | |
1634 | } | |
1635 | ||
1636 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1637 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1638 | sb->s_id); |
1639 | sb->s_flags &= ~MS_RDONLY; | |
1640 | } | |
1641 | #ifdef CONFIG_QUOTA | |
1642 | /* Needed for iput() to work correctly and not trash data */ | |
1643 | sb->s_flags |= MS_ACTIVE; | |
1644 | /* Turn on quotas so that they are updated correctly */ | |
1645 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1646 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1647 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1648 | if (ret < 0) |
1649 | printk(KERN_ERR | |
2c8be6b2 | 1650 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1651 | "quota: error %d\n", ret); |
1652 | } | |
1653 | } | |
1654 | #endif | |
1655 | ||
1656 | while (es->s_last_orphan) { | |
1657 | struct inode *inode; | |
1658 | ||
97bd42b9 JB |
1659 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1660 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1661 | es->s_last_orphan = 0; |
1662 | break; | |
1663 | } | |
1664 | ||
617ba13b | 1665 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
ac27a0ec DK |
1666 | DQUOT_INIT(inode); |
1667 | if (inode->i_nlink) { | |
1668 | printk(KERN_DEBUG | |
e5f8eab8 | 1669 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1670 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1671 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1672 | inode->i_ino, inode->i_size); |
617ba13b | 1673 | ext4_truncate(inode); |
ac27a0ec DK |
1674 | nr_truncates++; |
1675 | } else { | |
1676 | printk(KERN_DEBUG | |
1677 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1678 | __func__, inode->i_ino); |
ac27a0ec DK |
1679 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1680 | inode->i_ino); | |
1681 | nr_orphans++; | |
1682 | } | |
1683 | iput(inode); /* The delete magic happens here! */ | |
1684 | } | |
1685 | ||
2b2d6d01 | 1686 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1687 | |
1688 | if (nr_orphans) | |
617ba13b | 1689 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1690 | sb->s_id, PLURAL(nr_orphans)); |
1691 | if (nr_truncates) | |
617ba13b | 1692 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1693 | sb->s_id, PLURAL(nr_truncates)); |
1694 | #ifdef CONFIG_QUOTA | |
1695 | /* Turn quotas off */ | |
1696 | for (i = 0; i < MAXQUOTAS; i++) { | |
1697 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1698 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1699 | } |
1700 | #endif | |
1701 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1702 | } | |
cd2291a4 ES |
1703 | /* |
1704 | * Maximal extent format file size. | |
1705 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1706 | * extent format containers, within a sector_t, and within i_blocks | |
1707 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1708 | * so that won't be a limiting factor. | |
1709 | * | |
1710 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1711 | */ | |
f287a1a5 | 1712 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1713 | { |
1714 | loff_t res; | |
1715 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1716 | ||
1717 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1718 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1719 | /* |
b3a6ffe1 | 1720 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1721 | * i_block represent total blocks in 512 bytes |
1722 | * 32 == size of vfs inode i_blocks * 8 | |
1723 | */ | |
1724 | upper_limit = (1LL << 32) - 1; | |
1725 | ||
1726 | /* total blocks in file system block size */ | |
1727 | upper_limit >>= (blkbits - 9); | |
1728 | upper_limit <<= blkbits; | |
1729 | } | |
1730 | ||
1731 | /* 32-bit extent-start container, ee_block */ | |
1732 | res = 1LL << 32; | |
1733 | res <<= blkbits; | |
1734 | res -= 1; | |
1735 | ||
1736 | /* Sanity check against vm- & vfs- imposed limits */ | |
1737 | if (res > upper_limit) | |
1738 | res = upper_limit; | |
1739 | ||
1740 | return res; | |
1741 | } | |
ac27a0ec | 1742 | |
ac27a0ec | 1743 | /* |
cd2291a4 | 1744 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1745 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1746 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1747 | */ |
f287a1a5 | 1748 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1749 | { |
617ba13b | 1750 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1751 | int meta_blocks; |
1752 | loff_t upper_limit; | |
1753 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1754 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1755 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1756 | * does not exceed 2^48 -1 |
1757 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1758 | * total number of 512 bytes blocks of the file | |
1759 | */ | |
1760 | ||
f287a1a5 | 1761 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1762 | /* |
b3a6ffe1 | 1763 | * !has_huge_files or CONFIG_LBD is not enabled |
f287a1a5 TT |
1764 | * implies the inode i_block represent total blocks in |
1765 | * 512 bytes 32 == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1766 | */ |
1767 | upper_limit = (1LL << 32) - 1; | |
1768 | ||
1769 | /* total blocks in file system block size */ | |
1770 | upper_limit >>= (bits - 9); | |
1771 | ||
1772 | } else { | |
8180a562 AK |
1773 | /* |
1774 | * We use 48 bit ext4_inode i_blocks | |
1775 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
1776 | * represent total number of blocks in | |
1777 | * file system block size | |
1778 | */ | |
0fc1b451 AK |
1779 | upper_limit = (1LL << 48) - 1; |
1780 | ||
0fc1b451 AK |
1781 | } |
1782 | ||
1783 | /* indirect blocks */ | |
1784 | meta_blocks = 1; | |
1785 | /* double indirect blocks */ | |
1786 | meta_blocks += 1 + (1LL << (bits-2)); | |
1787 | /* tripple indirect blocks */ | |
1788 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1789 | ||
1790 | upper_limit -= meta_blocks; | |
1791 | upper_limit <<= bits; | |
ac27a0ec DK |
1792 | |
1793 | res += 1LL << (bits-2); | |
1794 | res += 1LL << (2*(bits-2)); | |
1795 | res += 1LL << (3*(bits-2)); | |
1796 | res <<= bits; | |
1797 | if (res > upper_limit) | |
1798 | res = upper_limit; | |
0fc1b451 AK |
1799 | |
1800 | if (res > MAX_LFS_FILESIZE) | |
1801 | res = MAX_LFS_FILESIZE; | |
1802 | ||
ac27a0ec DK |
1803 | return res; |
1804 | } | |
1805 | ||
617ba13b | 1806 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1807 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1808 | { |
617ba13b | 1809 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 1810 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
1811 | int has_super = 0; |
1812 | ||
1813 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
1814 | ||
617ba13b | 1815 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 1816 | nr < first_meta_bg) |
70bbb3e0 | 1817 | return logical_sb_block + nr + 1; |
ac27a0ec | 1818 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 1819 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 1820 | has_super = 1; |
617ba13b | 1821 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
1822 | } |
1823 | ||
c9de560d AT |
1824 | /** |
1825 | * ext4_get_stripe_size: Get the stripe size. | |
1826 | * @sbi: In memory super block info | |
1827 | * | |
1828 | * If we have specified it via mount option, then | |
1829 | * use the mount option value. If the value specified at mount time is | |
1830 | * greater than the blocks per group use the super block value. | |
1831 | * If the super block value is greater than blocks per group return 0. | |
1832 | * Allocator needs it be less than blocks per group. | |
1833 | * | |
1834 | */ | |
1835 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
1836 | { | |
1837 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
1838 | unsigned long stripe_width = | |
1839 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
1840 | ||
1841 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
1842 | return sbi->s_stripe; | |
1843 | ||
1844 | if (stripe_width <= sbi->s_blocks_per_group) | |
1845 | return stripe_width; | |
1846 | ||
1847 | if (stride <= sbi->s_blocks_per_group) | |
1848 | return stride; | |
1849 | ||
1850 | return 0; | |
1851 | } | |
ac27a0ec | 1852 | |
2b2d6d01 | 1853 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
1854 | __releases(kernel_lock) |
1855 | __acquires(kernel_lock) | |
1d03ec98 | 1856 | |
ac27a0ec | 1857 | { |
2b2d6d01 | 1858 | struct buffer_head *bh; |
617ba13b MC |
1859 | struct ext4_super_block *es = NULL; |
1860 | struct ext4_sb_info *sbi; | |
1861 | ext4_fsblk_t block; | |
1862 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 1863 | ext4_fsblk_t logical_sb_block; |
ac27a0ec DK |
1864 | unsigned long offset = 0; |
1865 | unsigned int journal_inum = 0; | |
1866 | unsigned long journal_devnum = 0; | |
1867 | unsigned long def_mount_opts; | |
1868 | struct inode *root; | |
9f6200bb | 1869 | char *cp; |
1d1fe1ee | 1870 | int ret = -EINVAL; |
ac27a0ec | 1871 | int blocksize; |
ac27a0ec DK |
1872 | int db_count; |
1873 | int i; | |
f287a1a5 | 1874 | int needs_recovery, has_huge_files; |
ac27a0ec | 1875 | __le32 features; |
bd81d8ee | 1876 | __u64 blocks_count; |
833f4077 | 1877 | int err; |
ac27a0ec DK |
1878 | |
1879 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
1880 | if (!sbi) | |
1881 | return -ENOMEM; | |
1882 | sb->s_fs_info = sbi; | |
1883 | sbi->s_mount_opt = 0; | |
617ba13b MC |
1884 | sbi->s_resuid = EXT4_DEF_RESUID; |
1885 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 1886 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 1887 | sbi->s_sb_block = sb_block; |
ac27a0ec DK |
1888 | |
1889 | unlock_kernel(); | |
1890 | ||
9f6200bb TT |
1891 | /* Cleanup superblock name */ |
1892 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
1893 | *cp = '!'; | |
1894 | ||
617ba13b | 1895 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 1896 | if (!blocksize) { |
617ba13b | 1897 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
1898 | goto out_fail; |
1899 | } | |
1900 | ||
1901 | /* | |
617ba13b | 1902 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
1903 | * block sizes. We need to calculate the offset from buffer start. |
1904 | */ | |
617ba13b | 1905 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
1906 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
1907 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 1908 | } else { |
70bbb3e0 | 1909 | logical_sb_block = sb_block; |
ac27a0ec DK |
1910 | } |
1911 | ||
70bbb3e0 | 1912 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 1913 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
1914 | goto out_fail; |
1915 | } | |
1916 | /* | |
1917 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 1918 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 1919 | */ |
617ba13b | 1920 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
1921 | sbi->s_es = es; |
1922 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
1923 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
1924 | goto cantfind_ext4; | |
ac27a0ec DK |
1925 | |
1926 | /* Set defaults before we parse the mount options */ | |
1927 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 1928 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 1929 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 1930 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 1931 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 1932 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 1933 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 1934 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 1935 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 1936 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 1937 | #endif |
03010a33 | 1938 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 1939 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 1940 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 1941 | #endif |
617ba13b MC |
1942 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
1943 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
1944 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
1945 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
1946 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
1947 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
1948 | ||
1949 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 1950 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 1951 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 1952 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
1953 | else |
1954 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1955 | |
1956 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
1957 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
1958 | ||
1959 | set_opt(sbi->s_mount_opt, RESERVATION); | |
571640ca | 1960 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 1961 | |
1e2462f9 MC |
1962 | /* |
1963 | * turn on extents feature by default in ext4 filesystem | |
e4079a11 ES |
1964 | * only if feature flag already set by mkfs or tune2fs. |
1965 | * Use -o noextents to turn it off | |
1e2462f9 | 1966 | */ |
e4079a11 ES |
1967 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) |
1968 | set_opt(sbi->s_mount_opt, EXTENTS); | |
1969 | else | |
1970 | ext4_warning(sb, __func__, | |
1971 | "extents feature not enabled on this filesystem, " | |
1972 | "use tune2fs.\n"); | |
1e2462f9 | 1973 | |
dd919b98 AK |
1974 | /* |
1975 | * enable delayed allocation by default | |
1976 | * Use -o nodelalloc to turn it off | |
1977 | */ | |
1978 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1979 | ||
1980 | ||
2b2d6d01 TT |
1981 | if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum, |
1982 | NULL, 0)) | |
ac27a0ec DK |
1983 | goto failed_mount; |
1984 | ||
1985 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 1986 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 1987 | |
617ba13b MC |
1988 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
1989 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
1990 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
1991 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 1992 | printk(KERN_WARNING |
617ba13b | 1993 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 1994 | "running e2fsck is recommended\n"); |
469108ff | 1995 | |
ac27a0ec DK |
1996 | /* |
1997 | * Check feature flags regardless of the revision level, since we | |
1998 | * previously didn't change the revision level when setting the flags, | |
1999 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2000 | */ | |
617ba13b | 2001 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2002 | if (features) { |
617ba13b | 2003 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
ac27a0ec DK |
2004 | "unsupported optional features (%x).\n", |
2005 | sb->s_id, le32_to_cpu(features)); | |
2006 | goto failed_mount; | |
2007 | } | |
617ba13b | 2008 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2009 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2010 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
ac27a0ec DK |
2011 | "unsupported optional features (%x).\n", |
2012 | sb->s_id, le32_to_cpu(features)); | |
2013 | goto failed_mount; | |
2014 | } | |
f287a1a5 TT |
2015 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2016 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2017 | if (has_huge_files) { | |
0fc1b451 AK |
2018 | /* |
2019 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2020 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2021 | */ |
2022 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2023 | !(sb->s_flags & MS_RDONLY)) { | |
2024 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2025 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2026 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2027 | goto failed_mount; |
2028 | } | |
2029 | } | |
ac27a0ec DK |
2030 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2031 | ||
617ba13b MC |
2032 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2033 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2034 | printk(KERN_ERR |
617ba13b | 2035 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2036 | blocksize, sb->s_id); |
2037 | goto failed_mount; | |
2038 | } | |
2039 | ||
ac27a0ec | 2040 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2041 | |
2042 | /* Validate the filesystem blocksize */ | |
2043 | if (!sb_set_blocksize(sb, blocksize)) { | |
2044 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2045 | blocksize); | |
ac27a0ec DK |
2046 | goto failed_mount; |
2047 | } | |
2048 | ||
2b2d6d01 | 2049 | brelse(bh); |
70bbb3e0 AM |
2050 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2051 | offset = do_div(logical_sb_block, blocksize); | |
2052 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2053 | if (!bh) { |
2054 | printk(KERN_ERR | |
617ba13b | 2055 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2056 | goto failed_mount; |
2057 | } | |
617ba13b | 2058 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2059 | sbi->s_es = es; |
617ba13b | 2060 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2061 | printk(KERN_ERR |
2062 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2063 | goto failed_mount; |
2064 | } | |
2065 | } | |
2066 | ||
f287a1a5 TT |
2067 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2068 | has_huge_files); | |
2069 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2070 | |
617ba13b MC |
2071 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2072 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2073 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2074 | } else { |
2075 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2076 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2077 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2078 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2079 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2080 | printk(KERN_ERR |
2081 | "EXT4-fs: unsupported inode size: %d\n", | |
2082 | sbi->s_inode_size); | |
ac27a0ec DK |
2083 | goto failed_mount; |
2084 | } | |
ef7f3835 KS |
2085 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2086 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2087 | } |
0d1ee42f AR |
2088 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2089 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2090 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2091 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2092 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2093 | printk(KERN_ERR |
8fadc143 | 2094 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2095 | sbi->s_desc_size); |
2096 | goto failed_mount; | |
2097 | } | |
2098 | } else | |
2099 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2100 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2101 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2102 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2103 | goto cantfind_ext4; |
2104 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2105 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2106 | goto cantfind_ext4; |
ac27a0ec DK |
2107 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2108 | sbi->s_inodes_per_block; | |
0d1ee42f | 2109 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2110 | sbi->s_sbh = bh; |
2111 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2112 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2113 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
2b2d6d01 | 2114 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2115 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2116 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2117 | i = le32_to_cpu(es->s_flags); |
2118 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2119 | sbi->s_hash_unsigned = 3; | |
2120 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2121 | #ifdef __CHAR_UNSIGNED__ | |
2122 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2123 | sbi->s_hash_unsigned = 3; | |
2124 | #else | |
2125 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2126 | #endif | |
2127 | sb->s_dirt = 1; | |
2128 | } | |
ac27a0ec DK |
2129 | |
2130 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2131 | printk(KERN_ERR |
2132 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2133 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2134 | goto failed_mount; |
2135 | } | |
ac27a0ec | 2136 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2137 | printk(KERN_ERR |
2138 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2139 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2140 | goto failed_mount; |
2141 | } | |
2142 | ||
bd81d8ee | 2143 | if (ext4_blocks_count(es) > |
ac27a0ec | 2144 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2145 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2146 | " too large to mount safely\n", sb->s_id); |
2147 | if (sizeof(sector_t) < 8) | |
617ba13b | 2148 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2149 | "enabled\n"); |
2150 | goto failed_mount; | |
2151 | } | |
2152 | ||
617ba13b MC |
2153 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2154 | goto cantfind_ext4; | |
e7c95593 ES |
2155 | |
2156 | /* ensure blocks_count calculation below doesn't sign-extend */ | |
2157 | if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < | |
2158 | le32_to_cpu(es->s_first_data_block) + 1) { | |
2159 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " | |
2160 | "first data block %u, blocks per group %lu\n", | |
2161 | ext4_blocks_count(es), | |
2162 | le32_to_cpu(es->s_first_data_block), | |
2163 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2164 | goto failed_mount; | |
2165 | } | |
bd81d8ee LV |
2166 | blocks_count = (ext4_blocks_count(es) - |
2167 | le32_to_cpu(es->s_first_data_block) + | |
2168 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2169 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
2170 | sbi->s_groups_count = blocks_count; | |
617ba13b MC |
2171 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2172 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2173 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2174 | GFP_KERNEL); |
2175 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2176 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2177 | goto failed_mount; |
2178 | } | |
2179 | ||
3244fcb1 | 2180 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2181 | if (ext4_proc_root) |
2182 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
2183 | ||
240799cd TT |
2184 | if (sbi->s_proc) |
2185 | proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, | |
2186 | &ext4_ui_proc_fops, | |
2187 | &sbi->s_inode_readahead_blks); | |
3244fcb1 | 2188 | #endif |
240799cd | 2189 | |
ac27a0ec DK |
2190 | bgl_lock_init(&sbi->s_blockgroup_lock); |
2191 | ||
2192 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2193 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2194 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2195 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2196 | printk(KERN_ERR "EXT4-fs: " |
2197 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2198 | db_count = i; |
2199 | goto failed_mount2; | |
2200 | } | |
2201 | } | |
2b2d6d01 | 2202 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2203 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2204 | goto failed_mount2; |
2205 | } | |
772cb7c8 JS |
2206 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2207 | if (!ext4_fill_flex_info(sb)) { | |
2208 | printk(KERN_ERR | |
2209 | "EXT4-fs: unable to initialize " | |
2210 | "flex_bg meta info!\n"); | |
2211 | goto failed_mount2; | |
2212 | } | |
2213 | ||
ac27a0ec DK |
2214 | sbi->s_gdb_count = db_count; |
2215 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2216 | spin_lock_init(&sbi->s_next_gen_lock); | |
2217 | ||
833f4077 PZ |
2218 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2219 | ext4_count_free_blocks(sb)); | |
2220 | if (!err) { | |
2221 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2222 | ext4_count_free_inodes(sb)); | |
2223 | } | |
2224 | if (!err) { | |
2225 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2226 | ext4_count_dirs(sb)); | |
2227 | } | |
6bc6e63f AK |
2228 | if (!err) { |
2229 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2230 | } | |
833f4077 PZ |
2231 | if (err) { |
2232 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2233 | goto failed_mount3; | |
2234 | } | |
ac27a0ec | 2235 | |
c9de560d AT |
2236 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2237 | ||
ac27a0ec DK |
2238 | /* |
2239 | * set up enough so that it can read an inode | |
2240 | */ | |
617ba13b MC |
2241 | sb->s_op = &ext4_sops; |
2242 | sb->s_export_op = &ext4_export_ops; | |
2243 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2244 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2245 | sb->s_qcop = &ext4_qctl_operations; |
2246 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2247 | #endif |
2248 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
2249 | ||
2250 | sb->s_root = NULL; | |
2251 | ||
2252 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2253 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2254 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2255 | |
2256 | /* | |
2257 | * The first inode we look at is the journal inode. Don't try | |
2258 | * root first: it may be modified in the journal! | |
2259 | */ | |
2260 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2261 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2262 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2263 | goto failed_mount3; |
624080ed TT |
2264 | if (!(sb->s_flags & MS_RDONLY) && |
2265 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2266 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2267 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2268 | "%u is corrupt\n", sb->s_id, |
624080ed | 2269 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2270 | if (test_opt(sb, ERRORS_RO)) { |
2271 | printk(KERN_CRIT | |
2272 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2273 | sb->s_flags |= MS_RDONLY; |
2274 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2275 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2276 | } | |
2277 | if (test_opt(sb, ERRORS_PANIC)) { | |
2278 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2279 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2280 | ext4_commit_super(sb, es, 1); | |
2281 | printk(KERN_CRIT | |
2282 | "EXT4-fs (device %s): mount failed\n", | |
2283 | sb->s_id); | |
2284 | goto failed_mount4; | |
2285 | } | |
2286 | } | |
ac27a0ec | 2287 | } else if (journal_inum) { |
617ba13b | 2288 | if (ext4_create_journal(sb, es, journal_inum)) |
ac27a0ec DK |
2289 | goto failed_mount3; |
2290 | } else { | |
2291 | if (!silent) | |
2b2d6d01 TT |
2292 | printk(KERN_ERR |
2293 | "ext4: No journal on filesystem on %s\n", | |
2294 | sb->s_id); | |
ac27a0ec DK |
2295 | goto failed_mount3; |
2296 | } | |
2297 | ||
eb40a09c JS |
2298 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2299 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2300 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
2301 | printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); | |
2302 | goto failed_mount4; | |
2303 | } | |
2304 | ||
818d276c GS |
2305 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2306 | jbd2_journal_set_features(sbi->s_journal, | |
2307 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2308 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2309 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2310 | jbd2_journal_set_features(sbi->s_journal, | |
2311 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2312 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2313 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2314 | } else { | |
2315 | jbd2_journal_clear_features(sbi->s_journal, | |
2316 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2317 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2318 | } | |
2319 | ||
ac27a0ec DK |
2320 | /* We have now updated the journal if required, so we can |
2321 | * validate the data journaling mode. */ | |
2322 | switch (test_opt(sb, DATA_FLAGS)) { | |
2323 | case 0: | |
2324 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2325 | * capabilities: ORDERED_DATA if the journal can |
2326 | * cope, else JOURNAL_DATA | |
2327 | */ | |
dab291af MC |
2328 | if (jbd2_journal_check_available_features |
2329 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2330 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2331 | else | |
2332 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2333 | break; | |
2334 | ||
617ba13b MC |
2335 | case EXT4_MOUNT_ORDERED_DATA: |
2336 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2337 | if (!jbd2_journal_check_available_features |
2338 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2339 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2340 | "requested data journaling mode\n"); |
2341 | goto failed_mount4; | |
2342 | } | |
2343 | default: | |
2344 | break; | |
2345 | } | |
2346 | ||
2347 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2348 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2349 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2350 | "its supported only with writeback mode\n"); |
2351 | clear_opt(sbi->s_mount_opt, NOBH); | |
2352 | } | |
2353 | } | |
2354 | /* | |
dab291af | 2355 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2356 | * so we can safely mount the rest of the filesystem now. |
2357 | */ | |
2358 | ||
1d1fe1ee DH |
2359 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2360 | if (IS_ERR(root)) { | |
617ba13b | 2361 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2362 | ret = PTR_ERR(root); |
ac27a0ec DK |
2363 | goto failed_mount4; |
2364 | } | |
2365 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2366 | iput(root); |
617ba13b | 2367 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2368 | goto failed_mount4; |
2369 | } | |
1d1fe1ee DH |
2370 | sb->s_root = d_alloc_root(root); |
2371 | if (!sb->s_root) { | |
2372 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2373 | iput(root); | |
2374 | ret = -ENOMEM; | |
2375 | goto failed_mount4; | |
2376 | } | |
ac27a0ec | 2377 | |
2b2d6d01 | 2378 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2379 | |
2380 | /* determine the minimum size of new large inodes, if present */ | |
2381 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2382 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2383 | EXT4_GOOD_OLD_INODE_SIZE; | |
2384 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2385 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2386 | if (sbi->s_want_extra_isize < | |
2387 | le16_to_cpu(es->s_want_extra_isize)) | |
2388 | sbi->s_want_extra_isize = | |
2389 | le16_to_cpu(es->s_want_extra_isize); | |
2390 | if (sbi->s_want_extra_isize < | |
2391 | le16_to_cpu(es->s_min_extra_isize)) | |
2392 | sbi->s_want_extra_isize = | |
2393 | le16_to_cpu(es->s_min_extra_isize); | |
2394 | } | |
2395 | } | |
2396 | /* Check if enough inode space is available */ | |
2397 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2398 | sbi->s_inode_size) { | |
2399 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2400 | EXT4_GOOD_OLD_INODE_SIZE; | |
2401 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2402 | "available.\n"); | |
2403 | } | |
2404 | ||
c2774d84 AK |
2405 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2406 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2407 | "requested data journaling mode\n"); | |
2408 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2409 | } else if (test_opt(sb, DELALLOC)) | |
2410 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2411 | ||
2412 | ext4_ext_init(sb); | |
2413 | err = ext4_mb_init(sb, needs_recovery); | |
2414 | if (err) { | |
2415 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2416 | err); | |
2417 | goto failed_mount4; | |
2418 | } | |
2419 | ||
ac27a0ec DK |
2420 | /* |
2421 | * akpm: core read_super() calls in here with the superblock locked. | |
2422 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
2423 | * in numerous places. Here we just pop the lock - it's relatively | |
2424 | * harmless, because we are now ready to accept write_super() requests, | |
2425 | * and aviro says that's the only reason for hanging onto the | |
2426 | * superblock lock. | |
2427 | */ | |
617ba13b MC |
2428 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2429 | ext4_orphan_cleanup(sb, es); | |
2430 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
ac27a0ec | 2431 | if (needs_recovery) |
2b2d6d01 | 2432 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
617ba13b | 2433 | ext4_mark_recovery_complete(sb, es); |
2b2d6d01 TT |
2434 | printk(KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", |
2435 | test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": | |
2436 | test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": | |
2437 | "writeback"); | |
ac27a0ec DK |
2438 | |
2439 | lock_kernel(); | |
2440 | return 0; | |
2441 | ||
617ba13b | 2442 | cantfind_ext4: |
ac27a0ec | 2443 | if (!silent) |
617ba13b | 2444 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2445 | sb->s_id); |
2446 | goto failed_mount; | |
2447 | ||
2448 | failed_mount4: | |
dab291af | 2449 | jbd2_journal_destroy(sbi->s_journal); |
47b4a50b | 2450 | sbi->s_journal = NULL; |
ac27a0ec DK |
2451 | failed_mount3: |
2452 | percpu_counter_destroy(&sbi->s_freeblocks_counter); | |
2453 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2454 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2455 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2456 | failed_mount2: |
2457 | for (i = 0; i < db_count; i++) | |
2458 | brelse(sbi->s_group_desc[i]); | |
2459 | kfree(sbi->s_group_desc); | |
2460 | failed_mount: | |
240799cd TT |
2461 | if (sbi->s_proc) { |
2462 | remove_proc_entry("inode_readahead_blks", sbi->s_proc); | |
9f6200bb | 2463 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2464 | } |
ac27a0ec DK |
2465 | #ifdef CONFIG_QUOTA |
2466 | for (i = 0; i < MAXQUOTAS; i++) | |
2467 | kfree(sbi->s_qf_names[i]); | |
2468 | #endif | |
617ba13b | 2469 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2470 | brelse(bh); |
2471 | out_fail: | |
2472 | sb->s_fs_info = NULL; | |
2473 | kfree(sbi); | |
2474 | lock_kernel(); | |
1d1fe1ee | 2475 | return ret; |
ac27a0ec DK |
2476 | } |
2477 | ||
2478 | /* | |
2479 | * Setup any per-fs journal parameters now. We'll do this both on | |
2480 | * initial mount, once the journal has been initialised but before we've | |
2481 | * done any recovery; and again on any subsequent remount. | |
2482 | */ | |
617ba13b | 2483 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2484 | { |
617ba13b | 2485 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
2486 | |
2487 | if (sbi->s_commit_interval) | |
2488 | journal->j_commit_interval = sbi->s_commit_interval; | |
617ba13b | 2489 | /* We could also set up an ext4-specific default for the commit |
ac27a0ec DK |
2490 | * interval here, but for now we'll just fall back to the jbd |
2491 | * default. */ | |
2492 | ||
2493 | spin_lock(&journal->j_state_lock); | |
2494 | if (test_opt(sb, BARRIER)) | |
dab291af | 2495 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2496 | else |
dab291af | 2497 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2498 | if (test_opt(sb, DATA_ERR_ABORT)) |
2499 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2500 | else | |
2501 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2502 | spin_unlock(&journal->j_state_lock); |
2503 | } | |
2504 | ||
617ba13b | 2505 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2506 | unsigned int journal_inum) |
2507 | { | |
2508 | struct inode *journal_inode; | |
2509 | journal_t *journal; | |
2510 | ||
2511 | /* First, test for the existence of a valid inode on disk. Bad | |
2512 | * things happen if we iget() an unused inode, as the subsequent | |
2513 | * iput() will try to delete it. */ | |
2514 | ||
1d1fe1ee DH |
2515 | journal_inode = ext4_iget(sb, journal_inum); |
2516 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2517 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2518 | return NULL; |
2519 | } | |
2520 | if (!journal_inode->i_nlink) { | |
2521 | make_bad_inode(journal_inode); | |
2522 | iput(journal_inode); | |
617ba13b | 2523 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2524 | return NULL; |
2525 | } | |
2526 | ||
e5f8eab8 | 2527 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2528 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2529 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2530 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2531 | iput(journal_inode); |
2532 | return NULL; | |
2533 | } | |
2534 | ||
dab291af | 2535 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2536 | if (!journal) { |
617ba13b | 2537 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2538 | iput(journal_inode); |
2539 | return NULL; | |
2540 | } | |
2541 | journal->j_private = sb; | |
617ba13b | 2542 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2543 | return journal; |
2544 | } | |
2545 | ||
617ba13b | 2546 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2547 | dev_t j_dev) |
2548 | { | |
2b2d6d01 | 2549 | struct buffer_head *bh; |
ac27a0ec | 2550 | journal_t *journal; |
617ba13b MC |
2551 | ext4_fsblk_t start; |
2552 | ext4_fsblk_t len; | |
ac27a0ec | 2553 | int hblock, blocksize; |
617ba13b | 2554 | ext4_fsblk_t sb_block; |
ac27a0ec | 2555 | unsigned long offset; |
2b2d6d01 | 2556 | struct ext4_super_block *es; |
ac27a0ec DK |
2557 | struct block_device *bdev; |
2558 | ||
617ba13b | 2559 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2560 | if (bdev == NULL) |
2561 | return NULL; | |
2562 | ||
2563 | if (bd_claim(bdev, sb)) { | |
2564 | printk(KERN_ERR | |
8c55e204 | 2565 | "EXT4: failed to claim external journal device.\n"); |
9a1c3542 | 2566 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
2567 | return NULL; |
2568 | } | |
2569 | ||
2570 | blocksize = sb->s_blocksize; | |
2571 | hblock = bdev_hardsect_size(bdev); | |
2572 | if (blocksize < hblock) { | |
2573 | printk(KERN_ERR | |
617ba13b | 2574 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2575 | goto out_bdev; |
2576 | } | |
2577 | ||
617ba13b MC |
2578 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2579 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2580 | set_blocksize(bdev, blocksize); |
2581 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2582 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2583 | "external journal\n"); |
2584 | goto out_bdev; | |
2585 | } | |
2586 | ||
617ba13b MC |
2587 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2588 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2589 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2590 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
2591 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
2592 | "bad superblock\n"); |
2593 | brelse(bh); | |
2594 | goto out_bdev; | |
2595 | } | |
2596 | ||
617ba13b MC |
2597 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
2598 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
2599 | brelse(bh); |
2600 | goto out_bdev; | |
2601 | } | |
2602 | ||
bd81d8ee | 2603 | len = ext4_blocks_count(es); |
ac27a0ec DK |
2604 | start = sb_block + 1; |
2605 | brelse(bh); /* we're done with the superblock */ | |
2606 | ||
dab291af | 2607 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
2608 | start, len, blocksize); |
2609 | if (!journal) { | |
617ba13b | 2610 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
2611 | goto out_bdev; |
2612 | } | |
2613 | journal->j_private = sb; | |
2614 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
2615 | wait_on_buffer(journal->j_sb_buffer); | |
2616 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 2617 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
2618 | goto out_journal; |
2619 | } | |
2620 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 2621 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
2622 | "user (unsupported) - %d\n", |
2623 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
2624 | goto out_journal; | |
2625 | } | |
617ba13b MC |
2626 | EXT4_SB(sb)->journal_bdev = bdev; |
2627 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
2628 | return journal; |
2629 | out_journal: | |
dab291af | 2630 | jbd2_journal_destroy(journal); |
ac27a0ec | 2631 | out_bdev: |
617ba13b | 2632 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
2633 | return NULL; |
2634 | } | |
2635 | ||
617ba13b MC |
2636 | static int ext4_load_journal(struct super_block *sb, |
2637 | struct ext4_super_block *es, | |
ac27a0ec DK |
2638 | unsigned long journal_devnum) |
2639 | { | |
2640 | journal_t *journal; | |
2641 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
2642 | dev_t journal_dev; | |
2643 | int err = 0; | |
2644 | int really_read_only; | |
2645 | ||
2646 | if (journal_devnum && | |
2647 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 2648 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
2649 | "numbers have changed\n"); |
2650 | journal_dev = new_decode_dev(journal_devnum); | |
2651 | } else | |
2652 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
2653 | ||
2654 | really_read_only = bdev_read_only(sb->s_bdev); | |
2655 | ||
2656 | /* | |
2657 | * Are we loading a blank journal or performing recovery after a | |
2658 | * crash? For recovery, we need to check in advance whether we | |
2659 | * can get read-write access to the device. | |
2660 | */ | |
2661 | ||
617ba13b | 2662 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 2663 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 2664 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
2665 | "required on readonly filesystem.\n"); |
2666 | if (really_read_only) { | |
617ba13b | 2667 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
2668 | "unavailable, cannot proceed.\n"); |
2669 | return -EROFS; | |
2670 | } | |
2b2d6d01 TT |
2671 | printk(KERN_INFO "EXT4-fs: write access will " |
2672 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
2673 | } |
2674 | } | |
2675 | ||
2676 | if (journal_inum && journal_dev) { | |
617ba13b | 2677 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
2678 | "and inode journals!\n"); |
2679 | return -EINVAL; | |
2680 | } | |
2681 | ||
2682 | if (journal_inum) { | |
617ba13b | 2683 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
2684 | return -EINVAL; |
2685 | } else { | |
617ba13b | 2686 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
2687 | return -EINVAL; |
2688 | } | |
2689 | ||
4776004f TT |
2690 | if (journal->j_flags & JBD2_BARRIER) |
2691 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
2692 | else | |
2693 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
2694 | ||
ac27a0ec | 2695 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 2696 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 2697 | if (err) { |
617ba13b | 2698 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 2699 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2700 | return err; |
2701 | } | |
2702 | } | |
2703 | ||
617ba13b | 2704 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 2705 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 2706 | if (!err) |
dab291af | 2707 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
2708 | |
2709 | if (err) { | |
617ba13b | 2710 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 2711 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2712 | return err; |
2713 | } | |
2714 | ||
617ba13b MC |
2715 | EXT4_SB(sb)->s_journal = journal; |
2716 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
2717 | |
2718 | if (journal_devnum && | |
2719 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
2720 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
2721 | sb->s_dirt = 1; | |
2722 | ||
2723 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2724 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2725 | } |
2726 | ||
2727 | return 0; | |
2728 | } | |
2729 | ||
2b2d6d01 TT |
2730 | static int ext4_create_journal(struct super_block *sb, |
2731 | struct ext4_super_block *es, | |
ac27a0ec DK |
2732 | unsigned int journal_inum) |
2733 | { | |
2734 | journal_t *journal; | |
6c675bd4 | 2735 | int err; |
ac27a0ec DK |
2736 | |
2737 | if (sb->s_flags & MS_RDONLY) { | |
617ba13b | 2738 | printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " |
ac27a0ec DK |
2739 | "create journal.\n"); |
2740 | return -EROFS; | |
2741 | } | |
2742 | ||
6c675bd4 BP |
2743 | journal = ext4_get_journal(sb, journal_inum); |
2744 | if (!journal) | |
ac27a0ec DK |
2745 | return -EINVAL; |
2746 | ||
617ba13b | 2747 | printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", |
ac27a0ec DK |
2748 | journal_inum); |
2749 | ||
6c675bd4 BP |
2750 | err = jbd2_journal_create(journal); |
2751 | if (err) { | |
617ba13b | 2752 | printk(KERN_ERR "EXT4-fs: error creating journal.\n"); |
dab291af | 2753 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
2754 | return -EIO; |
2755 | } | |
2756 | ||
617ba13b | 2757 | EXT4_SB(sb)->s_journal = journal; |
ac27a0ec | 2758 | |
617ba13b MC |
2759 | ext4_update_dynamic_rev(sb); |
2760 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
2761 | EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); | |
ac27a0ec DK |
2762 | |
2763 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
2764 | sb->s_dirt = 1; | |
2765 | ||
2766 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 2767 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
2768 | |
2769 | return 0; | |
2770 | } | |
2771 | ||
2b2d6d01 TT |
2772 | static void ext4_commit_super(struct super_block *sb, |
2773 | struct ext4_super_block *es, int sync) | |
ac27a0ec | 2774 | { |
617ba13b | 2775 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
ac27a0ec DK |
2776 | |
2777 | if (!sbh) | |
2778 | return; | |
914258bf TT |
2779 | if (buffer_write_io_error(sbh)) { |
2780 | /* | |
2781 | * Oh, dear. A previous attempt to write the | |
2782 | * superblock failed. This could happen because the | |
2783 | * USB device was yanked out. Or it could happen to | |
2784 | * be a transient write error and maybe the block will | |
2785 | * be remapped. Nothing we can do but to retry the | |
2786 | * write and hope for the best. | |
2787 | */ | |
2788 | printk(KERN_ERR "ext4: previous I/O error to " | |
2789 | "superblock detected for %s.\n", sb->s_id); | |
2790 | clear_buffer_write_io_error(sbh); | |
2791 | set_buffer_uptodate(sbh); | |
2792 | } | |
ac27a0ec | 2793 | es->s_wtime = cpu_to_le32(get_seconds()); |
bd81d8ee | 2794 | ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); |
617ba13b | 2795 | es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2796 | BUFFER_TRACE(sbh, "marking dirty"); |
2797 | mark_buffer_dirty(sbh); | |
914258bf | 2798 | if (sync) { |
ac27a0ec | 2799 | sync_dirty_buffer(sbh); |
914258bf TT |
2800 | if (buffer_write_io_error(sbh)) { |
2801 | printk(KERN_ERR "ext4: I/O error while writing " | |
2802 | "superblock for %s.\n", sb->s_id); | |
2803 | clear_buffer_write_io_error(sbh); | |
2804 | set_buffer_uptodate(sbh); | |
2805 | } | |
2806 | } | |
ac27a0ec DK |
2807 | } |
2808 | ||
2809 | ||
2810 | /* | |
2811 | * Have we just finished recovery? If so, and if we are mounting (or | |
2812 | * remounting) the filesystem readonly, then we will end up with a | |
2813 | * consistent fs on disk. Record that fact. | |
2814 | */ | |
2b2d6d01 TT |
2815 | static void ext4_mark_recovery_complete(struct super_block *sb, |
2816 | struct ext4_super_block *es) | |
ac27a0ec | 2817 | { |
617ba13b | 2818 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2819 | |
dab291af | 2820 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
2821 | if (jbd2_journal_flush(journal) < 0) |
2822 | goto out; | |
2823 | ||
32c37730 | 2824 | lock_super(sb); |
617ba13b | 2825 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 2826 | sb->s_flags & MS_RDONLY) { |
617ba13b | 2827 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 2828 | sb->s_dirt = 0; |
617ba13b | 2829 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2830 | } |
32c37730 | 2831 | unlock_super(sb); |
7ffe1ea8 HK |
2832 | |
2833 | out: | |
dab291af | 2834 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
2835 | } |
2836 | ||
2837 | /* | |
2838 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
2839 | * has recorded an error from a previous lifetime, move that error to the | |
2840 | * main filesystem now. | |
2841 | */ | |
2b2d6d01 TT |
2842 | static void ext4_clear_journal_err(struct super_block *sb, |
2843 | struct ext4_super_block *es) | |
ac27a0ec DK |
2844 | { |
2845 | journal_t *journal; | |
2846 | int j_errno; | |
2847 | const char *errstr; | |
2848 | ||
617ba13b | 2849 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2850 | |
2851 | /* | |
2852 | * Now check for any error status which may have been recorded in the | |
617ba13b | 2853 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
2854 | */ |
2855 | ||
dab291af | 2856 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
2857 | if (j_errno) { |
2858 | char nbuf[16]; | |
2859 | ||
617ba13b | 2860 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 2861 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 2862 | "from previous mount: %s", errstr); |
46e665e9 | 2863 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
2864 | "filesystem check."); |
2865 | ||
617ba13b MC |
2866 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
2867 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2b2d6d01 | 2868 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 2869 | |
dab291af | 2870 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
2871 | } |
2872 | } | |
2873 | ||
2874 | /* | |
2875 | * Force the running and committing transactions to commit, | |
2876 | * and wait on the commit. | |
2877 | */ | |
617ba13b | 2878 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
2879 | { |
2880 | journal_t *journal; | |
2881 | int ret; | |
2882 | ||
2883 | if (sb->s_flags & MS_RDONLY) | |
2884 | return 0; | |
2885 | ||
617ba13b | 2886 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 2887 | sb->s_dirt = 0; |
617ba13b | 2888 | ret = ext4_journal_force_commit(journal); |
ac27a0ec DK |
2889 | return ret; |
2890 | } | |
2891 | ||
2892 | /* | |
617ba13b | 2893 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec | 2894 | * have to propagate any other updates to the superblock on disk at this |
14ce0cb4 TT |
2895 | * point. (We can probably nuke this function altogether, and remove |
2896 | * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) | |
ac27a0ec | 2897 | */ |
2b2d6d01 | 2898 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec DK |
2899 | { |
2900 | if (mutex_trylock(&sb->s_lock) != 0) | |
2901 | BUG(); | |
2902 | sb->s_dirt = 0; | |
2903 | } | |
2904 | ||
617ba13b | 2905 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 2906 | { |
14ce0cb4 | 2907 | int ret = 0; |
ac27a0ec | 2908 | |
ede86cc4 | 2909 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
ac27a0ec | 2910 | sb->s_dirt = 0; |
14ce0cb4 TT |
2911 | if (wait) |
2912 | ret = ext4_force_commit(sb); | |
2913 | else | |
2914 | jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, NULL); | |
2915 | return ret; | |
ac27a0ec DK |
2916 | } |
2917 | ||
2918 | /* | |
2919 | * LVM calls this function before a (read-only) snapshot is created. This | |
2920 | * gives us a chance to flush the journal completely and mark the fs clean. | |
2921 | */ | |
617ba13b | 2922 | static void ext4_write_super_lockfs(struct super_block *sb) |
ac27a0ec DK |
2923 | { |
2924 | sb->s_dirt = 0; | |
2925 | ||
2926 | if (!(sb->s_flags & MS_RDONLY)) { | |
617ba13b | 2927 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
2928 | |
2929 | /* Now we set up the journal barrier. */ | |
dab291af | 2930 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
2931 | |
2932 | /* | |
2933 | * We don't want to clear needs_recovery flag when we failed | |
2934 | * to flush the journal. | |
2935 | */ | |
2936 | if (jbd2_journal_flush(journal) < 0) | |
2937 | return; | |
ac27a0ec DK |
2938 | |
2939 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b MC |
2940 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2941 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec DK |
2942 | } |
2943 | } | |
2944 | ||
2945 | /* | |
2946 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
2947 | * flag here, even though the filesystem is not technically dirty yet. | |
2948 | */ | |
617ba13b | 2949 | static void ext4_unlockfs(struct super_block *sb) |
ac27a0ec DK |
2950 | { |
2951 | if (!(sb->s_flags & MS_RDONLY)) { | |
2952 | lock_super(sb); | |
2953 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
2954 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
2955 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 2956 | unlock_super(sb); |
dab291af | 2957 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec DK |
2958 | } |
2959 | } | |
2960 | ||
2b2d6d01 | 2961 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 2962 | { |
2b2d6d01 | 2963 | struct ext4_super_block *es; |
617ba13b MC |
2964 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2965 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 2966 | unsigned long old_sb_flags; |
617ba13b | 2967 | struct ext4_mount_options old_opts; |
8a266467 | 2968 | ext4_group_t g; |
ac27a0ec DK |
2969 | int err; |
2970 | #ifdef CONFIG_QUOTA | |
2971 | int i; | |
2972 | #endif | |
2973 | ||
2974 | /* Store the original options */ | |
2975 | old_sb_flags = sb->s_flags; | |
2976 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
2977 | old_opts.s_resuid = sbi->s_resuid; | |
2978 | old_opts.s_resgid = sbi->s_resgid; | |
2979 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
2980 | #ifdef CONFIG_QUOTA | |
2981 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
2982 | for (i = 0; i < MAXQUOTAS; i++) | |
2983 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
2984 | #endif | |
2985 | ||
2986 | /* | |
2987 | * Allow the "check" option to be passed as a remount option. | |
2988 | */ | |
2989 | if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { | |
2990 | err = -EINVAL; | |
2991 | goto restore_opts; | |
2992 | } | |
2993 | ||
617ba13b | 2994 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 2995 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
2996 | |
2997 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2998 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
2999 | |
3000 | es = sbi->s_es; | |
3001 | ||
617ba13b | 3002 | ext4_init_journal_params(sb, sbi->s_journal); |
ac27a0ec DK |
3003 | |
3004 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3005 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3006 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3007 | err = -EROFS; |
3008 | goto restore_opts; | |
3009 | } | |
3010 | ||
3011 | if (*flags & MS_RDONLY) { | |
3012 | /* | |
3013 | * First of all, the unconditional stuff we have to do | |
3014 | * to disable replay of the journal when we next remount | |
3015 | */ | |
3016 | sb->s_flags |= MS_RDONLY; | |
3017 | ||
3018 | /* | |
3019 | * OK, test if we are remounting a valid rw partition | |
3020 | * readonly, and if so set the rdonly flag and then | |
3021 | * mark the partition as valid again. | |
3022 | */ | |
617ba13b MC |
3023 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3024 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3025 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3026 | ||
32c37730 JK |
3027 | /* |
3028 | * We have to unlock super so that we can wait for | |
3029 | * transactions. | |
3030 | */ | |
3031 | unlock_super(sb); | |
617ba13b | 3032 | ext4_mark_recovery_complete(sb, es); |
32c37730 | 3033 | lock_super(sb); |
ac27a0ec DK |
3034 | } else { |
3035 | __le32 ret; | |
617ba13b MC |
3036 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3037 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3038 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec DK |
3039 | "remount RDWR because of unsupported " |
3040 | "optional features (%x).\n", | |
3041 | sb->s_id, le32_to_cpu(ret)); | |
3042 | err = -EROFS; | |
3043 | goto restore_opts; | |
3044 | } | |
ead6596b | 3045 | |
8a266467 TT |
3046 | /* |
3047 | * Make sure the group descriptor checksums | |
3048 | * are sane. If they aren't, refuse to | |
3049 | * remount r/w. | |
3050 | */ | |
3051 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3052 | struct ext4_group_desc *gdp = | |
3053 | ext4_get_group_desc(sb, g, NULL); | |
3054 | ||
3055 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3056 | printk(KERN_ERR | |
3057 | "EXT4-fs: ext4_remount: " | |
3058 | "Checksum for group %lu failed (%u!=%u)\n", | |
3059 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), | |
3060 | le16_to_cpu(gdp->bg_checksum)); | |
3061 | err = -EINVAL; | |
3062 | goto restore_opts; | |
3063 | } | |
3064 | } | |
3065 | ||
ead6596b ES |
3066 | /* |
3067 | * If we have an unprocessed orphan list hanging | |
3068 | * around from a previously readonly bdev mount, | |
3069 | * require a full umount/remount for now. | |
3070 | */ | |
3071 | if (es->s_last_orphan) { | |
3072 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3073 | "remount RDWR because of unprocessed " | |
3074 | "orphan inode list. Please " | |
3075 | "umount/remount instead.\n", | |
3076 | sb->s_id); | |
3077 | err = -EINVAL; | |
3078 | goto restore_opts; | |
3079 | } | |
3080 | ||
ac27a0ec DK |
3081 | /* |
3082 | * Mounting a RDONLY partition read-write, so reread | |
3083 | * and store the current valid flag. (It may have | |
3084 | * been changed by e2fsck since we originally mounted | |
3085 | * the partition.) | |
3086 | */ | |
617ba13b | 3087 | ext4_clear_journal_err(sb, es); |
ac27a0ec | 3088 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3089 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3090 | goto restore_opts; |
2b2d6d01 | 3091 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3092 | sb->s_flags &= ~MS_RDONLY; |
3093 | } | |
3094 | } | |
3095 | #ifdef CONFIG_QUOTA | |
3096 | /* Release old quota file names */ | |
3097 | for (i = 0; i < MAXQUOTAS; i++) | |
3098 | if (old_opts.s_qf_names[i] && | |
3099 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3100 | kfree(old_opts.s_qf_names[i]); | |
3101 | #endif | |
3102 | return 0; | |
3103 | restore_opts: | |
3104 | sb->s_flags = old_sb_flags; | |
3105 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3106 | sbi->s_resuid = old_opts.s_resuid; | |
3107 | sbi->s_resgid = old_opts.s_resgid; | |
3108 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
3109 | #ifdef CONFIG_QUOTA | |
3110 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3111 | for (i = 0; i < MAXQUOTAS; i++) { | |
3112 | if (sbi->s_qf_names[i] && | |
3113 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3114 | kfree(sbi->s_qf_names[i]); | |
3115 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3116 | } | |
3117 | #endif | |
3118 | return err; | |
3119 | } | |
3120 | ||
2b2d6d01 | 3121 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3122 | { |
3123 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3124 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3125 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3126 | u64 fsid; |
ac27a0ec | 3127 | |
5e70030d BP |
3128 | if (test_opt(sb, MINIX_DF)) { |
3129 | sbi->s_overhead_last = 0; | |
6bc9feff | 3130 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
fd2d4291 | 3131 | ext4_group_t ngroups = sbi->s_groups_count, i; |
5e70030d | 3132 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3133 | smp_rmb(); |
3134 | ||
3135 | /* | |
5e70030d BP |
3136 | * Compute the overhead (FS structures). This is constant |
3137 | * for a given filesystem unless the number of block groups | |
3138 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3139 | */ |
3140 | ||
3141 | /* | |
3142 | * All of the blocks before first_data_block are | |
3143 | * overhead | |
3144 | */ | |
3145 | overhead = le32_to_cpu(es->s_first_data_block); | |
3146 | ||
3147 | /* | |
3148 | * Add the overhead attributed to the superblock and | |
3149 | * block group descriptors. If the sparse superblocks | |
3150 | * feature is turned on, then not all groups have this. | |
3151 | */ | |
3152 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3153 | overhead += ext4_bg_has_super(sb, i) + |
3154 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3155 | cond_resched(); |
3156 | } | |
3157 | ||
3158 | /* | |
3159 | * Every block group has an inode bitmap, a block | |
3160 | * bitmap, and an inode table. | |
3161 | */ | |
5e70030d BP |
3162 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3163 | sbi->s_overhead_last = overhead; | |
3164 | smp_wmb(); | |
6bc9feff | 3165 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3166 | } |
3167 | ||
617ba13b | 3168 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3169 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3170 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3171 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3172 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3173 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3174 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3175 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3176 | buf->f_bavail = 0; |
3177 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3178 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3179 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3180 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3181 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3182 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3183 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3184 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3185 | return 0; |
3186 | } | |
3187 | ||
3188 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3189 | * is locked for write. Otherwise the are possible deadlocks: | |
3190 | * Process 1 Process 2 | |
617ba13b | 3191 | * ext4_create() quota_sync() |
dab291af | 3192 | * jbd2_journal_start() write_dquot() |
ac27a0ec | 3193 | * DQUOT_INIT() down(dqio_mutex) |
dab291af | 3194 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3195 | * |
3196 | */ | |
3197 | ||
3198 | #ifdef CONFIG_QUOTA | |
3199 | ||
3200 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3201 | { | |
3202 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3203 | } | |
3204 | ||
617ba13b | 3205 | static int ext4_dquot_initialize(struct inode *inode, int type) |
ac27a0ec DK |
3206 | { |
3207 | handle_t *handle; | |
3208 | int ret, err; | |
3209 | ||
3210 | /* We may create quota structure so we need to reserve enough blocks */ | |
617ba13b | 3211 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); |
ac27a0ec DK |
3212 | if (IS_ERR(handle)) |
3213 | return PTR_ERR(handle); | |
3214 | ret = dquot_initialize(inode, type); | |
617ba13b | 3215 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3216 | if (!ret) |
3217 | ret = err; | |
3218 | return ret; | |
3219 | } | |
3220 | ||
617ba13b | 3221 | static int ext4_dquot_drop(struct inode *inode) |
ac27a0ec DK |
3222 | { |
3223 | handle_t *handle; | |
3224 | int ret, err; | |
3225 | ||
3226 | /* We may delete quota structure so we need to reserve enough blocks */ | |
617ba13b | 3227 | handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); |
2887df13 JK |
3228 | if (IS_ERR(handle)) { |
3229 | /* | |
3230 | * We call dquot_drop() anyway to at least release references | |
3231 | * to quota structures so that umount does not hang. | |
3232 | */ | |
3233 | dquot_drop(inode); | |
ac27a0ec | 3234 | return PTR_ERR(handle); |
2887df13 | 3235 | } |
ac27a0ec | 3236 | ret = dquot_drop(inode); |
617ba13b | 3237 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3238 | if (!ret) |
3239 | ret = err; | |
3240 | return ret; | |
3241 | } | |
3242 | ||
617ba13b | 3243 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3244 | { |
3245 | int ret, err; | |
3246 | handle_t *handle; | |
3247 | struct inode *inode; | |
3248 | ||
3249 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3250 | handle = ext4_journal_start(inode, |
3251 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3252 | if (IS_ERR(handle)) |
3253 | return PTR_ERR(handle); | |
3254 | ret = dquot_commit(dquot); | |
617ba13b | 3255 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3256 | if (!ret) |
3257 | ret = err; | |
3258 | return ret; | |
3259 | } | |
3260 | ||
617ba13b | 3261 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3262 | { |
3263 | int ret, err; | |
3264 | handle_t *handle; | |
3265 | ||
617ba13b MC |
3266 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3267 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3268 | if (IS_ERR(handle)) |
3269 | return PTR_ERR(handle); | |
3270 | ret = dquot_acquire(dquot); | |
617ba13b | 3271 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3272 | if (!ret) |
3273 | ret = err; | |
3274 | return ret; | |
3275 | } | |
3276 | ||
617ba13b | 3277 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3278 | { |
3279 | int ret, err; | |
3280 | handle_t *handle; | |
3281 | ||
617ba13b MC |
3282 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3283 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3284 | if (IS_ERR(handle)) { |
3285 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3286 | dquot_release(dquot); | |
ac27a0ec | 3287 | return PTR_ERR(handle); |
9c3013e9 | 3288 | } |
ac27a0ec | 3289 | ret = dquot_release(dquot); |
617ba13b | 3290 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3291 | if (!ret) |
3292 | ret = err; | |
3293 | return ret; | |
3294 | } | |
3295 | ||
617ba13b | 3296 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3297 | { |
2c8be6b2 | 3298 | /* Are we journaling quotas? */ |
617ba13b MC |
3299 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3300 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3301 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3302 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3303 | } else { |
3304 | return dquot_mark_dquot_dirty(dquot); | |
3305 | } | |
3306 | } | |
3307 | ||
617ba13b | 3308 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3309 | { |
3310 | int ret, err; | |
3311 | handle_t *handle; | |
3312 | ||
3313 | /* Data block + inode block */ | |
617ba13b | 3314 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3315 | if (IS_ERR(handle)) |
3316 | return PTR_ERR(handle); | |
3317 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3318 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3319 | if (!ret) |
3320 | ret = err; | |
3321 | return ret; | |
3322 | } | |
3323 | ||
3324 | /* | |
3325 | * Turn on quotas during mount time - we need to find | |
3326 | * the quota file and such... | |
3327 | */ | |
617ba13b | 3328 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3329 | { |
617ba13b MC |
3330 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3331 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3332 | } |
3333 | ||
3334 | /* | |
3335 | * Standard function to be called on quota_on | |
3336 | */ | |
617ba13b | 3337 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3338 | char *name, int remount) |
ac27a0ec DK |
3339 | { |
3340 | int err; | |
8264613d | 3341 | struct path path; |
ac27a0ec DK |
3342 | |
3343 | if (!test_opt(sb, QUOTA)) | |
3344 | return -EINVAL; | |
8264613d | 3345 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3346 | if (remount) |
8264613d | 3347 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3348 | |
8264613d | 3349 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3350 | if (err) |
3351 | return err; | |
0623543b | 3352 | |
ac27a0ec | 3353 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3354 | if (path.mnt->mnt_sb != sb) { |
3355 | path_put(&path); | |
ac27a0ec DK |
3356 | return -EXDEV; |
3357 | } | |
0623543b JK |
3358 | /* Journaling quota? */ |
3359 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3360 | /* Quotafile not in fs root? */ |
8264613d | 3361 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3362 | printk(KERN_WARNING |
3363 | "EXT4-fs: Quota file not on filesystem root. " | |
3364 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3365 | } |
0623543b JK |
3366 | |
3367 | /* | |
3368 | * When we journal data on quota file, we have to flush journal to see | |
3369 | * all updates to the file when we bypass pagecache... | |
3370 | */ | |
8264613d | 3371 | if (ext4_should_journal_data(path.dentry->d_inode)) { |
0623543b JK |
3372 | /* |
3373 | * We don't need to lock updates but journal_flush() could | |
3374 | * otherwise be livelocked... | |
3375 | */ | |
3376 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3377 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3378 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3379 | if (err) { |
8264613d | 3380 | path_put(&path); |
7ffe1ea8 HK |
3381 | return err; |
3382 | } | |
0623543b JK |
3383 | } |
3384 | ||
8264613d AV |
3385 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3386 | path_put(&path); | |
77e69dac | 3387 | return err; |
ac27a0ec DK |
3388 | } |
3389 | ||
3390 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3391 | * acquiring the locks... As quota files are never truncated and quota code | |
3392 | * itself serializes the operations (and noone else should touch the files) | |
3393 | * we don't have to be afraid of races */ | |
617ba13b | 3394 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3395 | size_t len, loff_t off) |
3396 | { | |
3397 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3398 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3399 | int err = 0; |
3400 | int offset = off & (sb->s_blocksize - 1); | |
3401 | int tocopy; | |
3402 | size_t toread; | |
3403 | struct buffer_head *bh; | |
3404 | loff_t i_size = i_size_read(inode); | |
3405 | ||
3406 | if (off > i_size) | |
3407 | return 0; | |
3408 | if (off+len > i_size) | |
3409 | len = i_size-off; | |
3410 | toread = len; | |
3411 | while (toread > 0) { | |
3412 | tocopy = sb->s_blocksize - offset < toread ? | |
3413 | sb->s_blocksize - offset : toread; | |
617ba13b | 3414 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3415 | if (err) |
3416 | return err; | |
3417 | if (!bh) /* A hole? */ | |
3418 | memset(data, 0, tocopy); | |
3419 | else | |
3420 | memcpy(data, bh->b_data+offset, tocopy); | |
3421 | brelse(bh); | |
3422 | offset = 0; | |
3423 | toread -= tocopy; | |
3424 | data += tocopy; | |
3425 | blk++; | |
3426 | } | |
3427 | return len; | |
3428 | } | |
3429 | ||
3430 | /* Write to quotafile (we know the transaction is already started and has | |
3431 | * enough credits) */ | |
617ba13b | 3432 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3433 | const char *data, size_t len, loff_t off) |
3434 | { | |
3435 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3436 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3437 | int err = 0; |
3438 | int offset = off & (sb->s_blocksize - 1); | |
3439 | int tocopy; | |
617ba13b | 3440 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3441 | size_t towrite = len; |
3442 | struct buffer_head *bh; | |
3443 | handle_t *handle = journal_current_handle(); | |
3444 | ||
9c3013e9 | 3445 | if (!handle) { |
e5f8eab8 | 3446 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3447 | " cancelled because transaction is not started.\n", |
3448 | (unsigned long long)off, (unsigned long long)len); | |
3449 | return -EIO; | |
3450 | } | |
ac27a0ec DK |
3451 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3452 | while (towrite > 0) { | |
3453 | tocopy = sb->s_blocksize - offset < towrite ? | |
3454 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3455 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3456 | if (!bh) |
3457 | goto out; | |
3458 | if (journal_quota) { | |
617ba13b | 3459 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3460 | if (err) { |
3461 | brelse(bh); | |
3462 | goto out; | |
3463 | } | |
3464 | } | |
3465 | lock_buffer(bh); | |
3466 | memcpy(bh->b_data+offset, data, tocopy); | |
3467 | flush_dcache_page(bh->b_page); | |
3468 | unlock_buffer(bh); | |
3469 | if (journal_quota) | |
617ba13b | 3470 | err = ext4_journal_dirty_metadata(handle, bh); |
ac27a0ec DK |
3471 | else { |
3472 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3473 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3474 | mark_buffer_dirty(bh); |
3475 | } | |
3476 | brelse(bh); | |
3477 | if (err) | |
3478 | goto out; | |
3479 | offset = 0; | |
3480 | towrite -= tocopy; | |
3481 | data += tocopy; | |
3482 | blk++; | |
3483 | } | |
3484 | out: | |
4d04e4fb JK |
3485 | if (len == towrite) { |
3486 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3487 | return err; |
4d04e4fb | 3488 | } |
ac27a0ec DK |
3489 | if (inode->i_size < off+len-towrite) { |
3490 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3491 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3492 | } |
ac27a0ec | 3493 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3494 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3495 | mutex_unlock(&inode->i_mutex); |
3496 | return len - towrite; | |
3497 | } | |
3498 | ||
3499 | #endif | |
3500 | ||
617ba13b | 3501 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3502 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3503 | { | |
617ba13b | 3504 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3505 | } |
3506 | ||
5e8814f2 TT |
3507 | #ifdef CONFIG_PROC_FS |
3508 | static int ext4_ui_proc_show(struct seq_file *m, void *v) | |
3509 | { | |
3510 | unsigned int *p = m->private; | |
3511 | ||
3512 | seq_printf(m, "%u\n", *p); | |
3513 | return 0; | |
3514 | } | |
3515 | ||
3516 | static int ext4_ui_proc_open(struct inode *inode, struct file *file) | |
3517 | { | |
3518 | return single_open(file, ext4_ui_proc_show, PDE(inode)->data); | |
3519 | } | |
3520 | ||
3521 | static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, | |
3522 | size_t cnt, loff_t *ppos) | |
3523 | { | |
23475e26 | 3524 | unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; |
5e8814f2 | 3525 | char str[32]; |
5e8814f2 TT |
3526 | |
3527 | if (cnt >= sizeof(str)) | |
3528 | return -EINVAL; | |
3529 | if (copy_from_user(str, buf, cnt)) | |
3530 | return -EFAULT; | |
23475e26 RK |
3531 | |
3532 | *p = simple_strtoul(str, NULL, 0); | |
5e8814f2 TT |
3533 | return cnt; |
3534 | } | |
3535 | ||
3536 | const struct file_operations ext4_ui_proc_fops = { | |
3537 | .owner = THIS_MODULE, | |
3538 | .open = ext4_ui_proc_open, | |
3539 | .read = seq_read, | |
3540 | .llseek = seq_lseek, | |
3541 | .release = single_release, | |
3542 | .write = ext4_ui_proc_write, | |
3543 | }; | |
3544 | #endif | |
3545 | ||
03010a33 TT |
3546 | static struct file_system_type ext4_fs_type = { |
3547 | .owner = THIS_MODULE, | |
3548 | .name = "ext4", | |
3549 | .get_sb = ext4_get_sb, | |
3550 | .kill_sb = kill_block_super, | |
3551 | .fs_flags = FS_REQUIRES_DEV, | |
3552 | }; | |
3553 | ||
3554 | #ifdef CONFIG_EXT4DEV_COMPAT | |
3555 | static int ext4dev_get_sb(struct file_system_type *fs_type, | |
3556 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
3557 | { | |
3558 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3559 | "to mount using ext4\n"); | |
3560 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3561 | "will go away by 2.6.31\n"); | |
3562 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); | |
3563 | } | |
3564 | ||
617ba13b | 3565 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3566 | .owner = THIS_MODULE, |
617ba13b | 3567 | .name = "ext4dev", |
03010a33 | 3568 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3569 | .kill_sb = kill_block_super, |
3570 | .fs_flags = FS_REQUIRES_DEV, | |
3571 | }; | |
03010a33 TT |
3572 | MODULE_ALIAS("ext4dev"); |
3573 | #endif | |
ac27a0ec | 3574 | |
617ba13b | 3575 | static int __init init_ext4_fs(void) |
ac27a0ec | 3576 | { |
c9de560d AT |
3577 | int err; |
3578 | ||
9f6200bb | 3579 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3580 | err = init_ext4_mballoc(); |
ac27a0ec DK |
3581 | if (err) |
3582 | return err; | |
c9de560d AT |
3583 | |
3584 | err = init_ext4_xattr(); | |
3585 | if (err) | |
3586 | goto out2; | |
ac27a0ec DK |
3587 | err = init_inodecache(); |
3588 | if (err) | |
3589 | goto out1; | |
03010a33 | 3590 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3591 | if (err) |
3592 | goto out; | |
03010a33 TT |
3593 | #ifdef CONFIG_EXT4DEV_COMPAT |
3594 | err = register_filesystem(&ext4dev_fs_type); | |
3595 | if (err) { | |
3596 | unregister_filesystem(&ext4_fs_type); | |
3597 | goto out; | |
3598 | } | |
3599 | #endif | |
ac27a0ec DK |
3600 | return 0; |
3601 | out: | |
3602 | destroy_inodecache(); | |
3603 | out1: | |
617ba13b | 3604 | exit_ext4_xattr(); |
c9de560d AT |
3605 | out2: |
3606 | exit_ext4_mballoc(); | |
ac27a0ec DK |
3607 | return err; |
3608 | } | |
3609 | ||
617ba13b | 3610 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3611 | { |
03010a33 TT |
3612 | unregister_filesystem(&ext4_fs_type); |
3613 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 3614 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 3615 | #endif |
ac27a0ec | 3616 | destroy_inodecache(); |
617ba13b | 3617 | exit_ext4_xattr(); |
c9de560d | 3618 | exit_ext4_mballoc(); |
9f6200bb | 3619 | remove_proc_entry("fs/ext4", NULL); |
ac27a0ec DK |
3620 | } |
3621 | ||
3622 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
617ba13b | 3623 | MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); |
ac27a0ec | 3624 | MODULE_LICENSE("GPL"); |
617ba13b MC |
3625 | module_init(init_ext4_fs) |
3626 | module_exit(exit_ext4_fs) |