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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
29 | #include <linux/smp_lock.h> | |
30 | #include <linux/buffer_head.h> | |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
9f6200bb | 38 | #include <linux/proc_fs.h> |
3197ebdb | 39 | #include <linux/ctype.h> |
ede86cc4 | 40 | #include <linux/marker.h> |
1330593e | 41 | #include <linux/log2.h> |
717d50e4 | 42 | #include <linux/crc16.h> |
ac27a0ec DK |
43 | #include <asm/uaccess.h> |
44 | ||
3dcf5451 CH |
45 | #include "ext4.h" |
46 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
47 | #include "xattr.h" |
48 | #include "acl.h" | |
49 | #include "namei.h" | |
717d50e4 | 50 | #include "group.h" |
ac27a0ec | 51 | |
9f6200bb | 52 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 53 | static struct kset *ext4_kset; |
9f6200bb | 54 | |
617ba13b | 55 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 56 | unsigned long journal_devnum); |
c4be0c1d | 57 | static int ext4_commit_super(struct super_block *sb, |
2b2d6d01 TT |
58 | struct ext4_super_block *es, int sync); |
59 | static void ext4_mark_recovery_complete(struct super_block *sb, | |
60 | struct ext4_super_block *es); | |
61 | static void ext4_clear_journal_err(struct super_block *sb, | |
62 | struct ext4_super_block *es); | |
617ba13b | 63 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 64 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 65 | char nbuf[16]); |
2b2d6d01 TT |
66 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
67 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 68 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 69 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 70 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 71 | |
bd81d8ee | 72 | |
8fadc143 AR |
73 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
74 | struct ext4_group_desc *bg) | |
bd81d8ee | 75 | { |
3a14589c | 76 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 77 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
3a14589c | 78 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
79 | } |
80 | ||
8fadc143 AR |
81 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
82 | struct ext4_group_desc *bg) | |
bd81d8ee | 83 | { |
5272f837 | 84 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 85 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 86 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
87 | } |
88 | ||
8fadc143 AR |
89 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
90 | struct ext4_group_desc *bg) | |
bd81d8ee | 91 | { |
5272f837 | 92 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 93 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
5272f837 | 94 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
95 | } |
96 | ||
560671a0 AK |
97 | __u32 ext4_free_blks_count(struct super_block *sb, |
98 | struct ext4_group_desc *bg) | |
99 | { | |
100 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
101 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
102 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); | |
103 | } | |
104 | ||
105 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
106 | struct ext4_group_desc *bg) | |
107 | { | |
108 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
109 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
110 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); | |
111 | } | |
112 | ||
113 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
114 | struct ext4_group_desc *bg) | |
115 | { | |
116 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
117 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
118 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); | |
119 | } | |
120 | ||
121 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
122 | struct ext4_group_desc *bg) | |
123 | { | |
124 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
125 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
126 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); | |
127 | } | |
128 | ||
8fadc143 AR |
129 | void ext4_block_bitmap_set(struct super_block *sb, |
130 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 131 | { |
3a14589c | 132 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
133 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
134 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
135 | } |
136 | ||
8fadc143 AR |
137 | void ext4_inode_bitmap_set(struct super_block *sb, |
138 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 139 | { |
5272f837 | 140 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
141 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
142 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
143 | } |
144 | ||
8fadc143 AR |
145 | void ext4_inode_table_set(struct super_block *sb, |
146 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 147 | { |
5272f837 | 148 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
149 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
150 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
151 | } |
152 | ||
560671a0 AK |
153 | void ext4_free_blks_set(struct super_block *sb, |
154 | struct ext4_group_desc *bg, __u32 count) | |
155 | { | |
156 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
157 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
158 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
159 | } | |
160 | ||
161 | void ext4_free_inodes_set(struct super_block *sb, | |
162 | struct ext4_group_desc *bg, __u32 count) | |
163 | { | |
164 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
165 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
166 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
167 | } | |
168 | ||
169 | void ext4_used_dirs_set(struct super_block *sb, | |
170 | struct ext4_group_desc *bg, __u32 count) | |
171 | { | |
172 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
173 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
174 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
175 | } | |
176 | ||
177 | void ext4_itable_unused_set(struct super_block *sb, | |
178 | struct ext4_group_desc *bg, __u32 count) | |
179 | { | |
180 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
181 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
182 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
183 | } | |
184 | ||
ac27a0ec | 185 | /* |
dab291af | 186 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
187 | * |
188 | * The only special thing we need to do here is to make sure that all | |
189 | * journal_end calls result in the superblock being marked dirty, so | |
190 | * that sync() will call the filesystem's write_super callback if | |
191 | * appropriate. | |
192 | */ | |
617ba13b | 193 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
194 | { |
195 | journal_t *journal; | |
196 | ||
197 | if (sb->s_flags & MS_RDONLY) | |
198 | return ERR_PTR(-EROFS); | |
199 | ||
200 | /* Special case here: if the journal has aborted behind our | |
201 | * backs (eg. EIO in the commit thread), then we still need to | |
202 | * take the FS itself readonly cleanly. */ | |
617ba13b | 203 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
204 | if (journal) { |
205 | if (is_journal_aborted(journal)) { | |
206 | ext4_abort(sb, __func__, | |
207 | "Detected aborted journal"); | |
208 | return ERR_PTR(-EROFS); | |
209 | } | |
210 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 211 | } |
0390131b FM |
212 | /* |
213 | * We're not journaling, return the appropriate indication. | |
214 | */ | |
215 | current->journal_info = EXT4_NOJOURNAL_HANDLE; | |
216 | return current->journal_info; | |
ac27a0ec DK |
217 | } |
218 | ||
219 | /* | |
220 | * The only special thing we need to do here is to make sure that all | |
dab291af | 221 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
222 | * that sync() will call the filesystem's write_super callback if |
223 | * appropriate. | |
224 | */ | |
617ba13b | 225 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
226 | { |
227 | struct super_block *sb; | |
228 | int err; | |
229 | int rc; | |
230 | ||
0390131b FM |
231 | if (!ext4_handle_valid(handle)) { |
232 | /* | |
233 | * Do this here since we don't call jbd2_journal_stop() in | |
234 | * no-journal mode. | |
235 | */ | |
236 | current->journal_info = NULL; | |
237 | return 0; | |
238 | } | |
ac27a0ec DK |
239 | sb = handle->h_transaction->t_journal->j_private; |
240 | err = handle->h_err; | |
dab291af | 241 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
242 | |
243 | if (!err) | |
244 | err = rc; | |
245 | if (err) | |
617ba13b | 246 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
247 | return err; |
248 | } | |
249 | ||
617ba13b | 250 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
251 | struct buffer_head *bh, handle_t *handle, int err) |
252 | { | |
253 | char nbuf[16]; | |
617ba13b | 254 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 255 | |
0390131b FM |
256 | BUG_ON(!ext4_handle_valid(handle)); |
257 | ||
ac27a0ec DK |
258 | if (bh) |
259 | BUFFER_TRACE(bh, "abort"); | |
260 | ||
261 | if (!handle->h_err) | |
262 | handle->h_err = err; | |
263 | ||
264 | if (is_handle_aborted(handle)) | |
265 | return; | |
266 | ||
267 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
268 | caller, errstr, err_fn); | |
269 | ||
dab291af | 270 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
271 | } |
272 | ||
273 | /* Deal with the reporting of failure conditions on a filesystem such as | |
274 | * inconsistencies detected or read IO failures. | |
275 | * | |
276 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 277 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
278 | * write ordering constraints on the superblock which prevent us from |
279 | * writing it out straight away; and given that the journal is about to | |
280 | * be aborted, we can't rely on the current, or future, transactions to | |
281 | * write out the superblock safely. | |
282 | * | |
dab291af | 283 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
284 | * the journal instead. On recovery, the journal will compain about |
285 | * that error until we've noted it down and cleared it. | |
286 | */ | |
287 | ||
617ba13b | 288 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 289 | { |
617ba13b | 290 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 291 | |
617ba13b MC |
292 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
293 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
294 | |
295 | if (sb->s_flags & MS_RDONLY) | |
296 | return; | |
297 | ||
2b2d6d01 | 298 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 299 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 300 | |
617ba13b | 301 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 302 | if (journal) |
dab291af | 303 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 304 | } |
2b2d6d01 TT |
305 | if (test_opt(sb, ERRORS_RO)) { |
306 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
307 | sb->s_flags |= MS_RDONLY; |
308 | } | |
617ba13b | 309 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 310 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 311 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
312 | sb->s_id); |
313 | } | |
314 | ||
2b2d6d01 TT |
315 | void ext4_error(struct super_block *sb, const char *function, |
316 | const char *fmt, ...) | |
ac27a0ec DK |
317 | { |
318 | va_list args; | |
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 | ||
617ba13b | 326 | ext4_handle_error(sb); |
ac27a0ec DK |
327 | } |
328 | ||
2b2d6d01 | 329 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
330 | char nbuf[16]) |
331 | { | |
332 | char *errstr = NULL; | |
333 | ||
334 | switch (errno) { | |
335 | case -EIO: | |
336 | errstr = "IO failure"; | |
337 | break; | |
338 | case -ENOMEM: | |
339 | errstr = "Out of memory"; | |
340 | break; | |
341 | case -EROFS: | |
dab291af | 342 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
343 | errstr = "Journal has aborted"; |
344 | else | |
345 | errstr = "Readonly filesystem"; | |
346 | break; | |
347 | default: | |
348 | /* If the caller passed in an extra buffer for unknown | |
349 | * errors, textualise them now. Else we just return | |
350 | * NULL. */ | |
351 | if (nbuf) { | |
352 | /* Check for truncated error codes... */ | |
353 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
354 | errstr = nbuf; | |
355 | } | |
356 | break; | |
357 | } | |
358 | ||
359 | return errstr; | |
360 | } | |
361 | ||
617ba13b | 362 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
363 | * automatically and invokes the appropriate error response. */ |
364 | ||
2b2d6d01 | 365 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
366 | { |
367 | char nbuf[16]; | |
368 | const char *errstr; | |
369 | ||
370 | /* Special case: if the error is EROFS, and we're not already | |
371 | * inside a transaction, then there's really no point in logging | |
372 | * an error. */ | |
373 | if (errno == -EROFS && journal_current_handle() == NULL && | |
374 | (sb->s_flags & MS_RDONLY)) | |
375 | return; | |
376 | ||
617ba13b | 377 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
378 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
379 | sb->s_id, function, errstr); | |
ac27a0ec | 380 | |
617ba13b | 381 | ext4_handle_error(sb); |
ac27a0ec DK |
382 | } |
383 | ||
384 | /* | |
617ba13b | 385 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
386 | * abort function may be used to deal with unrecoverable failures such |
387 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
388 | * | |
389 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
390 | * unless the error response on the fs has been set to panic in which | |
391 | * case we take the easy way out and panic immediately. | |
392 | */ | |
393 | ||
2b2d6d01 TT |
394 | void ext4_abort(struct super_block *sb, const char *function, |
395 | const char *fmt, ...) | |
ac27a0ec DK |
396 | { |
397 | va_list args; | |
398 | ||
2b2d6d01 | 399 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
400 | |
401 | va_start(args, fmt); | |
2b2d6d01 | 402 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
403 | vprintk(fmt, args); |
404 | printk("\n"); | |
405 | va_end(args); | |
406 | ||
407 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 408 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
409 | |
410 | if (sb->s_flags & MS_RDONLY) | |
411 | return; | |
412 | ||
413 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 414 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 415 | sb->s_flags |= MS_RDONLY; |
617ba13b | 416 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
417 | if (EXT4_SB(sb)->s_journal) |
418 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
419 | } |
420 | ||
2b2d6d01 TT |
421 | void ext4_warning(struct super_block *sb, const char *function, |
422 | const char *fmt, ...) | |
ac27a0ec DK |
423 | { |
424 | va_list args; | |
425 | ||
426 | va_start(args, fmt); | |
617ba13b | 427 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
428 | sb->s_id, function); |
429 | vprintk(fmt, args); | |
430 | printk("\n"); | |
431 | va_end(args); | |
432 | } | |
433 | ||
5d1b1b3f AK |
434 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
435 | const char *function, const char *fmt, ...) | |
436 | __releases(bitlock) | |
437 | __acquires(bitlock) | |
438 | { | |
439 | va_list args; | |
440 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
441 | ||
442 | va_start(args, fmt); | |
443 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
444 | vprintk(fmt, args); | |
445 | printk("\n"); | |
446 | va_end(args); | |
447 | ||
448 | if (test_opt(sb, ERRORS_CONT)) { | |
449 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
450 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
451 | ext4_commit_super(sb, es, 0); | |
452 | return; | |
453 | } | |
454 | ext4_unlock_group(sb, grp); | |
455 | ext4_handle_error(sb); | |
456 | /* | |
457 | * We only get here in the ERRORS_RO case; relocking the group | |
458 | * may be dangerous, but nothing bad will happen since the | |
459 | * filesystem will have already been marked read/only and the | |
460 | * journal has been aborted. We return 1 as a hint to callers | |
461 | * who might what to use the return value from | |
462 | * ext4_grp_locked_error() to distinguish beween the | |
463 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
464 | * aggressively from the ext4 function in question, with a | |
465 | * more appropriate error code. | |
466 | */ | |
467 | ext4_lock_group(sb, grp); | |
468 | return; | |
469 | } | |
470 | ||
471 | ||
617ba13b | 472 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 473 | { |
617ba13b | 474 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 475 | |
617ba13b | 476 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
477 | return; |
478 | ||
46e665e9 | 479 | ext4_warning(sb, __func__, |
ac27a0ec DK |
480 | "updating to rev %d because of new feature flag, " |
481 | "running e2fsck is recommended", | |
617ba13b | 482 | EXT4_DYNAMIC_REV); |
ac27a0ec | 483 | |
617ba13b MC |
484 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
485 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
486 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
487 | /* leave es->s_feature_*compat flags alone */ |
488 | /* es->s_uuid will be set by e2fsck if empty */ | |
489 | ||
490 | /* | |
491 | * The rest of the superblock fields should be zero, and if not it | |
492 | * means they are likely already in use, so leave them alone. We | |
493 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
494 | */ | |
495 | } | |
496 | ||
497 | /* | |
498 | * Open the external journal device | |
499 | */ | |
617ba13b | 500 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
501 | { |
502 | struct block_device *bdev; | |
503 | char b[BDEVNAME_SIZE]; | |
504 | ||
505 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
506 | if (IS_ERR(bdev)) | |
507 | goto fail; | |
508 | return bdev; | |
509 | ||
510 | fail: | |
abda1418 | 511 | printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
512 | __bdevname(dev, b), PTR_ERR(bdev)); |
513 | return NULL; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Release the journal device | |
518 | */ | |
617ba13b | 519 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
520 | { |
521 | bd_release(bdev); | |
9a1c3542 | 522 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
523 | } |
524 | ||
617ba13b | 525 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
526 | { |
527 | struct block_device *bdev; | |
528 | int ret = -ENODEV; | |
529 | ||
530 | bdev = sbi->journal_bdev; | |
531 | if (bdev) { | |
617ba13b | 532 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
533 | sbi->journal_bdev = NULL; |
534 | } | |
535 | return ret; | |
536 | } | |
537 | ||
538 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
539 | { | |
617ba13b | 540 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
541 | } |
542 | ||
617ba13b | 543 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
544 | { |
545 | struct list_head *l; | |
546 | ||
547 | printk(KERN_ERR "sb orphan head is %d\n", | |
548 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
549 | ||
550 | printk(KERN_ERR "sb_info orphan list:\n"); | |
551 | list_for_each(l, &sbi->s_orphan) { | |
552 | struct inode *inode = orphan_list_entry(l); | |
553 | printk(KERN_ERR " " | |
554 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
555 | inode->i_sb->s_id, inode->i_ino, inode, | |
556 | inode->i_mode, inode->i_nlink, | |
557 | NEXT_ORPHAN(inode)); | |
558 | } | |
559 | } | |
560 | ||
2b2d6d01 | 561 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 562 | { |
617ba13b MC |
563 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
564 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 565 | int i, err; |
ac27a0ec | 566 | |
c9de560d | 567 | ext4_mb_release(sb); |
a86c6181 | 568 | ext4_ext_release(sb); |
617ba13b | 569 | ext4_xattr_put_super(sb); |
0390131b FM |
570 | if (sbi->s_journal) { |
571 | err = jbd2_journal_destroy(sbi->s_journal); | |
572 | sbi->s_journal = NULL; | |
573 | if (err < 0) | |
574 | ext4_abort(sb, __func__, | |
575 | "Couldn't clean up the journal"); | |
576 | } | |
ac27a0ec | 577 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 578 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 579 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
617ba13b | 580 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 581 | } |
240799cd | 582 | if (sbi->s_proc) { |
9f6200bb | 583 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 584 | } |
3197ebdb | 585 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
586 | |
587 | for (i = 0; i < sbi->s_gdb_count; i++) | |
588 | brelse(sbi->s_group_desc[i]); | |
589 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
590 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
591 | vfree(sbi->s_flex_groups); | |
592 | else | |
593 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
594 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
595 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
596 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 597 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
598 | brelse(sbi->s_sbh); |
599 | #ifdef CONFIG_QUOTA | |
600 | for (i = 0; i < MAXQUOTAS; i++) | |
601 | kfree(sbi->s_qf_names[i]); | |
602 | #endif | |
603 | ||
604 | /* Debugging code just in case the in-memory inode orphan list | |
605 | * isn't empty. The on-disk one can be non-empty if we've | |
606 | * detected an error and taken the fs readonly, but the | |
607 | * in-memory list had better be clean by this point. */ | |
608 | if (!list_empty(&sbi->s_orphan)) | |
609 | dump_orphan_list(sb, sbi); | |
610 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
611 | ||
f98393a6 | 612 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
613 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
614 | /* | |
615 | * Invalidate the journal device's buffers. We don't want them | |
616 | * floating about in memory - the physical journal device may | |
617 | * hotswapped, and it breaks the `ro-after' testing code. | |
618 | */ | |
619 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 620 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 621 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
622 | } |
623 | sb->s_fs_info = NULL; | |
3197ebdb TT |
624 | /* |
625 | * Now that we are completely done shutting down the | |
626 | * superblock, we need to actually destroy the kobject. | |
627 | */ | |
628 | unlock_kernel(); | |
629 | unlock_super(sb); | |
630 | kobject_put(&sbi->s_kobj); | |
631 | wait_for_completion(&sbi->s_kobj_unregister); | |
632 | lock_super(sb); | |
633 | lock_kernel(); | |
705895b6 | 634 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
635 | kfree(sbi); |
636 | return; | |
637 | } | |
638 | ||
e18b890b | 639 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
640 | |
641 | /* | |
642 | * Called inside transaction, so use GFP_NOFS | |
643 | */ | |
617ba13b | 644 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 645 | { |
617ba13b | 646 | struct ext4_inode_info *ei; |
ac27a0ec | 647 | |
e6b4f8da | 648 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
649 | if (!ei) |
650 | return NULL; | |
03010a33 | 651 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
652 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
653 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 654 | #endif |
ac27a0ec | 655 | ei->vfs_inode.i_version = 1; |
91246c00 | 656 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 657 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
658 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
659 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
660 | /* |
661 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
662 | * therefore it can be null here. Don't check it, just initialize | |
663 | * jinode. | |
664 | */ | |
678aaf48 | 665 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
666 | ei->i_reserved_data_blocks = 0; |
667 | ei->i_reserved_meta_blocks = 0; | |
668 | ei->i_allocated_meta_blocks = 0; | |
669 | ei->i_delalloc_reserved_flag = 0; | |
670 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
ac27a0ec DK |
671 | return &ei->vfs_inode; |
672 | } | |
673 | ||
617ba13b | 674 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 675 | { |
9f7dd93d VA |
676 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
677 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
678 | EXT4_I(inode)); | |
679 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
680 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
681 | true); | |
682 | dump_stack(); | |
683 | } | |
617ba13b | 684 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
685 | } |
686 | ||
51cc5068 | 687 | static void init_once(void *foo) |
ac27a0ec | 688 | { |
617ba13b | 689 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 690 | |
a35afb83 | 691 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 692 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 693 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 694 | #endif |
0e855ac8 | 695 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 696 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
697 | } |
698 | ||
699 | static int init_inodecache(void) | |
700 | { | |
617ba13b MC |
701 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
702 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
703 | 0, (SLAB_RECLAIM_ACCOUNT| |
704 | SLAB_MEM_SPREAD), | |
20c2df83 | 705 | init_once); |
617ba13b | 706 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
707 | return -ENOMEM; |
708 | return 0; | |
709 | } | |
710 | ||
711 | static void destroy_inodecache(void) | |
712 | { | |
617ba13b | 713 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
714 | } |
715 | ||
617ba13b | 716 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 717 | { |
03010a33 | 718 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
719 | if (EXT4_I(inode)->i_acl && |
720 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
721 | posix_acl_release(EXT4_I(inode)->i_acl); | |
722 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
723 | } | |
724 | if (EXT4_I(inode)->i_default_acl && | |
725 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
726 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
727 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
728 | } |
729 | #endif | |
c2ea3fde | 730 | ext4_discard_preallocations(inode); |
0390131b FM |
731 | if (EXT4_JOURNAL(inode)) |
732 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 733 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
734 | } |
735 | ||
2b2d6d01 TT |
736 | static inline void ext4_show_quota_options(struct seq_file *seq, |
737 | struct super_block *sb) | |
ac27a0ec DK |
738 | { |
739 | #if defined(CONFIG_QUOTA) | |
617ba13b | 740 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
741 | |
742 | if (sbi->s_jquota_fmt) | |
743 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 744 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
745 | |
746 | if (sbi->s_qf_names[USRQUOTA]) | |
747 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
748 | ||
749 | if (sbi->s_qf_names[GRPQUOTA]) | |
750 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
751 | ||
617ba13b | 752 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
753 | seq_puts(seq, ",usrquota"); |
754 | ||
617ba13b | 755 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
756 | seq_puts(seq, ",grpquota"); |
757 | #endif | |
758 | } | |
759 | ||
d9c9bef1 MS |
760 | /* |
761 | * Show an option if | |
762 | * - it's set to a non-default value OR | |
763 | * - if the per-sb default is different from the global default | |
764 | */ | |
617ba13b | 765 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 766 | { |
aa22df2c AK |
767 | int def_errors; |
768 | unsigned long def_mount_opts; | |
ac27a0ec | 769 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
770 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
771 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
772 | |
773 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 774 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
775 | |
776 | if (sbi->s_sb_block != 1) | |
777 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
778 | if (test_opt(sb, MINIX_DF)) | |
779 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 780 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
781 | seq_puts(seq, ",grpid"); |
782 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
783 | seq_puts(seq, ",nogrpid"); | |
784 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
785 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
786 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
787 | } | |
788 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
789 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
790 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
791 | } | |
bb4f397a | 792 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 793 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
794 | def_errors == EXT4_ERRORS_CONTINUE) { |
795 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
796 | } |
797 | } | |
aa22df2c | 798 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 799 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 800 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 801 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 802 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 803 | seq_puts(seq, ",nouid32"); |
aa22df2c | 804 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
805 | seq_puts(seq, ",debug"); |
806 | if (test_opt(sb, OLDALLOC)) | |
807 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 808 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
809 | if (test_opt(sb, XATTR_USER) && |
810 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
811 | seq_puts(seq, ",user_xattr"); |
812 | if (!test_opt(sb, XATTR_USER) && | |
813 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
814 | seq_puts(seq, ",nouser_xattr"); | |
815 | } | |
816 | #endif | |
03010a33 | 817 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 818 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
819 | seq_puts(seq, ",acl"); |
820 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
821 | seq_puts(seq, ",noacl"); | |
822 | #endif | |
30773840 | 823 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
824 | seq_printf(seq, ",commit=%u", |
825 | (unsigned) (sbi->s_commit_interval / HZ)); | |
826 | } | |
30773840 TT |
827 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
828 | seq_printf(seq, ",min_batch_time=%u", | |
829 | (unsigned) sbi->s_min_batch_time); | |
830 | } | |
831 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
832 | seq_printf(seq, ",max_batch_time=%u", | |
833 | (unsigned) sbi->s_min_batch_time); | |
834 | } | |
835 | ||
571640ca ES |
836 | /* |
837 | * We're changing the default of barrier mount option, so | |
838 | * let's always display its mount state so it's clear what its | |
839 | * status is. | |
840 | */ | |
841 | seq_puts(seq, ",barrier="); | |
842 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
843 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
844 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
845 | if (test_opt(sb, NOBH)) |
846 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
847 | if (test_opt(sb, I_VERSION)) |
848 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
849 | if (!test_opt(sb, DELALLOC)) |
850 | seq_puts(seq, ",nodelalloc"); | |
851 | ||
ac27a0ec | 852 | |
cb45bbe4 MS |
853 | if (sbi->s_stripe) |
854 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
855 | /* |
856 | * journal mode get enabled in different ways | |
857 | * So just print the value even if we didn't specify it | |
858 | */ | |
617ba13b | 859 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 860 | seq_puts(seq, ",data=journal"); |
617ba13b | 861 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 862 | seq_puts(seq, ",data=ordered"); |
617ba13b | 863 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
864 | seq_puts(seq, ",data=writeback"); |
865 | ||
240799cd TT |
866 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
867 | seq_printf(seq, ",inode_readahead_blks=%u", | |
868 | sbi->s_inode_readahead_blks); | |
869 | ||
5bf5683a HK |
870 | if (test_opt(sb, DATA_ERR_ABORT)) |
871 | seq_puts(seq, ",data_err=abort"); | |
872 | ||
afd4672d | 873 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 874 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 875 | |
617ba13b | 876 | ext4_show_quota_options(seq, sb); |
ac27a0ec DK |
877 | return 0; |
878 | } | |
879 | ||
880 | ||
1b961ac0 CH |
881 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
882 | u64 ino, u32 generation) | |
ac27a0ec | 883 | { |
ac27a0ec | 884 | struct inode *inode; |
ac27a0ec | 885 | |
617ba13b | 886 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 887 | return ERR_PTR(-ESTALE); |
617ba13b | 888 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
889 | return ERR_PTR(-ESTALE); |
890 | ||
891 | /* iget isn't really right if the inode is currently unallocated!! | |
892 | * | |
617ba13b | 893 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
894 | * deleted, so we should be safe. |
895 | * | |
896 | * Currently we don't know the generation for parent directory, so | |
897 | * a generation of 0 means "accept any" | |
898 | */ | |
1d1fe1ee DH |
899 | inode = ext4_iget(sb, ino); |
900 | if (IS_ERR(inode)) | |
901 | return ERR_CAST(inode); | |
902 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
903 | iput(inode); |
904 | return ERR_PTR(-ESTALE); | |
905 | } | |
1b961ac0 CH |
906 | |
907 | return inode; | |
908 | } | |
909 | ||
910 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
911 | int fh_len, int fh_type) | |
912 | { | |
913 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
914 | ext4_nfs_get_inode); | |
915 | } | |
916 | ||
917 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
918 | int fh_len, int fh_type) | |
919 | { | |
920 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
921 | ext4_nfs_get_inode); | |
ac27a0ec DK |
922 | } |
923 | ||
c39a7f84 TO |
924 | /* |
925 | * Try to release metadata pages (indirect blocks, directories) which are | |
926 | * mapped via the block device. Since these pages could have journal heads | |
927 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
928 | * jbd2 layer's try_to_free_buffers() function to release them. | |
929 | */ | |
930 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) | |
931 | { | |
932 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
933 | ||
934 | WARN_ON(PageChecked(page)); | |
935 | if (!page_has_buffers(page)) | |
936 | return 0; | |
937 | if (journal) | |
938 | return jbd2_journal_try_to_free_buffers(journal, page, | |
939 | wait & ~__GFP_WAIT); | |
940 | return try_to_free_buffers(page); | |
941 | } | |
942 | ||
ac27a0ec | 943 | #ifdef CONFIG_QUOTA |
af5bc92d | 944 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 945 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 946 | |
617ba13b MC |
947 | static int ext4_write_dquot(struct dquot *dquot); |
948 | static int ext4_acquire_dquot(struct dquot *dquot); | |
949 | static int ext4_release_dquot(struct dquot *dquot); | |
950 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
951 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
952 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
953 | char *path, int remount); | |
617ba13b MC |
954 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
955 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 956 | size_t len, loff_t off); |
617ba13b | 957 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
958 | const char *data, size_t len, loff_t off); |
959 | ||
617ba13b | 960 | static struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
961 | .initialize = dquot_initialize, |
962 | .drop = dquot_drop, | |
ac27a0ec | 963 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
964 | .reserve_space = dquot_reserve_space, |
965 | .claim_space = dquot_claim_space, | |
966 | .release_rsv = dquot_release_reserved_space, | |
967 | .get_reserved_space = ext4_get_reserved_space, | |
ac27a0ec DK |
968 | .alloc_inode = dquot_alloc_inode, |
969 | .free_space = dquot_free_space, | |
970 | .free_inode = dquot_free_inode, | |
971 | .transfer = dquot_transfer, | |
617ba13b MC |
972 | .write_dquot = ext4_write_dquot, |
973 | .acquire_dquot = ext4_acquire_dquot, | |
974 | .release_dquot = ext4_release_dquot, | |
975 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
976 | .write_info = ext4_write_info, |
977 | .alloc_dquot = dquot_alloc, | |
978 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
979 | }; |
980 | ||
617ba13b MC |
981 | static struct quotactl_ops ext4_qctl_operations = { |
982 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
983 | .quota_off = vfs_quota_off, |
984 | .quota_sync = vfs_quota_sync, | |
985 | .get_info = vfs_get_dqinfo, | |
986 | .set_info = vfs_set_dqinfo, | |
987 | .get_dqblk = vfs_get_dqblk, | |
988 | .set_dqblk = vfs_set_dqblk | |
989 | }; | |
990 | #endif | |
991 | ||
ee9b6d61 | 992 | static const struct super_operations ext4_sops = { |
617ba13b MC |
993 | .alloc_inode = ext4_alloc_inode, |
994 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
995 | .write_inode = ext4_write_inode, |
996 | .dirty_inode = ext4_dirty_inode, | |
997 | .delete_inode = ext4_delete_inode, | |
998 | .put_super = ext4_put_super, | |
999 | .write_super = ext4_write_super, | |
1000 | .sync_fs = ext4_sync_fs, | |
c4be0c1d TS |
1001 | .freeze_fs = ext4_freeze, |
1002 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1003 | .statfs = ext4_statfs, |
1004 | .remount_fs = ext4_remount, | |
1005 | .clear_inode = ext4_clear_inode, | |
1006 | .show_options = ext4_show_options, | |
ac27a0ec | 1007 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1008 | .quota_read = ext4_quota_read, |
1009 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1010 | #endif |
c39a7f84 | 1011 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1012 | }; |
1013 | ||
39655164 | 1014 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1015 | .fh_to_dentry = ext4_fh_to_dentry, |
1016 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1017 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1018 | }; |
1019 | ||
1020 | enum { | |
1021 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1022 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1023 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1024 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1025 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1026 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1027 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1028 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1029 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
5bf5683a | 1030 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec DK |
1031 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1032 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
06705bff TT |
1033 | Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, |
1034 | Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1035 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
b3881f74 | 1036 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1037 | }; |
1038 | ||
a447c093 | 1039 | static const match_table_t tokens = { |
ac27a0ec DK |
1040 | {Opt_bsd_df, "bsddf"}, |
1041 | {Opt_minix_df, "minixdf"}, | |
1042 | {Opt_grpid, "grpid"}, | |
1043 | {Opt_grpid, "bsdgroups"}, | |
1044 | {Opt_nogrpid, "nogrpid"}, | |
1045 | {Opt_nogrpid, "sysvgroups"}, | |
1046 | {Opt_resgid, "resgid=%u"}, | |
1047 | {Opt_resuid, "resuid=%u"}, | |
1048 | {Opt_sb, "sb=%u"}, | |
1049 | {Opt_err_cont, "errors=continue"}, | |
1050 | {Opt_err_panic, "errors=panic"}, | |
1051 | {Opt_err_ro, "errors=remount-ro"}, | |
1052 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1053 | {Opt_debug, "debug"}, |
1054 | {Opt_oldalloc, "oldalloc"}, | |
1055 | {Opt_orlov, "orlov"}, | |
1056 | {Opt_user_xattr, "user_xattr"}, | |
1057 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1058 | {Opt_acl, "acl"}, | |
1059 | {Opt_noacl, "noacl"}, | |
ac27a0ec DK |
1060 | {Opt_noload, "noload"}, |
1061 | {Opt_nobh, "nobh"}, | |
1062 | {Opt_bh, "bh"}, | |
1063 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1064 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1065 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1066 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1067 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1068 | {Opt_journal_checksum, "journal_checksum"}, |
1069 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1070 | {Opt_abort, "abort"}, |
1071 | {Opt_data_journal, "data=journal"}, | |
1072 | {Opt_data_ordered, "data=ordered"}, | |
1073 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1074 | {Opt_data_err_abort, "data_err=abort"}, |
1075 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1076 | {Opt_offusrjquota, "usrjquota="}, |
1077 | {Opt_usrjquota, "usrjquota=%s"}, | |
1078 | {Opt_offgrpjquota, "grpjquota="}, | |
1079 | {Opt_grpjquota, "grpjquota=%s"}, | |
1080 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1081 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1082 | {Opt_grpquota, "grpquota"}, | |
1083 | {Opt_noquota, "noquota"}, | |
1084 | {Opt_quota, "quota"}, | |
1085 | {Opt_usrquota, "usrquota"}, | |
1086 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1087 | {Opt_barrier, "barrier"}, |
1088 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1089 | {Opt_i_version, "i_version"}, |
c9de560d | 1090 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1091 | {Opt_resize, "resize"}, |
64769240 | 1092 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1093 | {Opt_nodelalloc, "nodelalloc"}, |
240799cd | 1094 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1095 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1096 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1097 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1098 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
f3f12faa | 1099 | {Opt_err, NULL}, |
ac27a0ec DK |
1100 | }; |
1101 | ||
617ba13b | 1102 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1103 | { |
617ba13b | 1104 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1105 | char *options = (char *) *data; |
1106 | ||
1107 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1108 | return 1; /* Default location */ | |
1109 | options += 3; | |
617ba13b | 1110 | /*todo: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1111 | sb_block = simple_strtoul(options, &options, 0); |
1112 | if (*options && *options != ',') { | |
4776004f | 1113 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1114 | (char *) *data); |
1115 | return 1; | |
1116 | } | |
1117 | if (*options == ',') | |
1118 | options++; | |
1119 | *data = (void *) options; | |
1120 | return sb_block; | |
1121 | } | |
1122 | ||
b3881f74 TT |
1123 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1124 | ||
2b2d6d01 | 1125 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1126 | unsigned long *journal_devnum, |
b3881f74 | 1127 | unsigned int *journal_ioprio, |
2b2d6d01 | 1128 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1129 | { |
617ba13b | 1130 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1131 | char *p; |
ac27a0ec DK |
1132 | substring_t args[MAX_OPT_ARGS]; |
1133 | int data_opt = 0; | |
1134 | int option; | |
1135 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1136 | int qtype, qfmt; |
ac27a0ec DK |
1137 | char *qname; |
1138 | #endif | |
1139 | ||
1140 | if (!options) | |
1141 | return 1; | |
1142 | ||
2b2d6d01 | 1143 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1144 | int token; |
1145 | if (!*p) | |
1146 | continue; | |
1147 | ||
1148 | token = match_token(p, tokens, args); | |
1149 | switch (token) { | |
1150 | case Opt_bsd_df: | |
2b2d6d01 | 1151 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1152 | break; |
1153 | case Opt_minix_df: | |
2b2d6d01 | 1154 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1155 | break; |
1156 | case Opt_grpid: | |
2b2d6d01 | 1157 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1158 | break; |
1159 | case Opt_nogrpid: | |
2b2d6d01 | 1160 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1161 | break; |
1162 | case Opt_resuid: | |
1163 | if (match_int(&args[0], &option)) | |
1164 | return 0; | |
1165 | sbi->s_resuid = option; | |
1166 | break; | |
1167 | case Opt_resgid: | |
1168 | if (match_int(&args[0], &option)) | |
1169 | return 0; | |
1170 | sbi->s_resgid = option; | |
1171 | break; | |
1172 | case Opt_sb: | |
1173 | /* handled by get_sb_block() instead of here */ | |
1174 | /* *sb_block = match_int(&args[0]); */ | |
1175 | break; | |
1176 | case Opt_err_panic: | |
2b2d6d01 TT |
1177 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1178 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1179 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1180 | break; |
1181 | case Opt_err_ro: | |
2b2d6d01 TT |
1182 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1183 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1184 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1185 | break; |
1186 | case Opt_err_cont: | |
2b2d6d01 TT |
1187 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1188 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1189 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1190 | break; |
1191 | case Opt_nouid32: | |
2b2d6d01 | 1192 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1193 | break; |
ac27a0ec | 1194 | case Opt_debug: |
2b2d6d01 | 1195 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1196 | break; |
1197 | case Opt_oldalloc: | |
2b2d6d01 | 1198 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1199 | break; |
1200 | case Opt_orlov: | |
2b2d6d01 | 1201 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1202 | break; |
03010a33 | 1203 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1204 | case Opt_user_xattr: |
2b2d6d01 | 1205 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1206 | break; |
1207 | case Opt_nouser_xattr: | |
2b2d6d01 | 1208 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1209 | break; |
1210 | #else | |
1211 | case Opt_user_xattr: | |
1212 | case Opt_nouser_xattr: | |
4776004f TT |
1213 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1214 | "not supported\n"); | |
ac27a0ec DK |
1215 | break; |
1216 | #endif | |
03010a33 | 1217 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1218 | case Opt_acl: |
1219 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1220 | break; | |
1221 | case Opt_noacl: | |
1222 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1223 | break; | |
1224 | #else | |
1225 | case Opt_acl: | |
1226 | case Opt_noacl: | |
4776004f TT |
1227 | printk(KERN_ERR "EXT4 (no)acl options " |
1228 | "not supported\n"); | |
ac27a0ec DK |
1229 | break; |
1230 | #endif | |
ac27a0ec DK |
1231 | case Opt_journal_update: |
1232 | /* @@@ FIXME */ | |
1233 | /* Eventually we will want to be able to create | |
1234 | a journal file here. For now, only allow the | |
1235 | user to specify an existing inode to be the | |
1236 | journal file. */ | |
1237 | if (is_remount) { | |
617ba13b | 1238 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1239 | "journal on remount\n"); |
1240 | return 0; | |
1241 | } | |
2b2d6d01 | 1242 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1243 | break; |
ac27a0ec DK |
1244 | case Opt_journal_dev: |
1245 | if (is_remount) { | |
617ba13b | 1246 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1247 | "journal on remount\n"); |
1248 | return 0; | |
1249 | } | |
1250 | if (match_int(&args[0], &option)) | |
1251 | return 0; | |
1252 | *journal_devnum = option; | |
1253 | break; | |
818d276c GS |
1254 | case Opt_journal_checksum: |
1255 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1256 | break; | |
1257 | case Opt_journal_async_commit: | |
1258 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1259 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1260 | break; | |
ac27a0ec | 1261 | case Opt_noload: |
2b2d6d01 | 1262 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1263 | break; |
1264 | case Opt_commit: | |
1265 | if (match_int(&args[0], &option)) | |
1266 | return 0; | |
1267 | if (option < 0) | |
1268 | return 0; | |
1269 | if (option == 0) | |
cd02ff0b | 1270 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1271 | sbi->s_commit_interval = HZ * option; |
1272 | break; | |
30773840 TT |
1273 | case Opt_max_batch_time: |
1274 | if (match_int(&args[0], &option)) | |
1275 | return 0; | |
1276 | if (option < 0) | |
1277 | return 0; | |
1278 | if (option == 0) | |
1279 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1280 | sbi->s_max_batch_time = option; | |
1281 | break; | |
1282 | case Opt_min_batch_time: | |
1283 | if (match_int(&args[0], &option)) | |
1284 | return 0; | |
1285 | if (option < 0) | |
1286 | return 0; | |
1287 | sbi->s_min_batch_time = option; | |
1288 | break; | |
ac27a0ec | 1289 | case Opt_data_journal: |
617ba13b | 1290 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1291 | goto datacheck; |
1292 | case Opt_data_ordered: | |
617ba13b | 1293 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1294 | goto datacheck; |
1295 | case Opt_data_writeback: | |
617ba13b | 1296 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1297 | datacheck: |
1298 | if (is_remount) { | |
617ba13b | 1299 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1300 | != data_opt) { |
1301 | printk(KERN_ERR | |
617ba13b | 1302 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1303 | "mode on remount\n"); |
1304 | return 0; | |
1305 | } | |
1306 | } else { | |
617ba13b | 1307 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1308 | sbi->s_mount_opt |= data_opt; |
1309 | } | |
1310 | break; | |
5bf5683a HK |
1311 | case Opt_data_err_abort: |
1312 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1313 | break; | |
1314 | case Opt_data_err_ignore: | |
1315 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1316 | break; | |
ac27a0ec DK |
1317 | #ifdef CONFIG_QUOTA |
1318 | case Opt_usrjquota: | |
1319 | qtype = USRQUOTA; | |
1320 | goto set_qf_name; | |
1321 | case Opt_grpjquota: | |
1322 | qtype = GRPQUOTA; | |
1323 | set_qf_name: | |
17bd13b3 | 1324 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1325 | !sbi->s_qf_names[qtype]) { |
ac27a0ec | 1326 | printk(KERN_ERR |
4776004f TT |
1327 | "EXT4-fs: Cannot change journaled " |
1328 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1329 | return 0; |
1330 | } | |
1331 | qname = match_strdup(&args[0]); | |
1332 | if (!qname) { | |
1333 | printk(KERN_ERR | |
617ba13b | 1334 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1335 | "storing quotafile name.\n"); |
1336 | return 0; | |
1337 | } | |
1338 | if (sbi->s_qf_names[qtype] && | |
1339 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1340 | printk(KERN_ERR | |
617ba13b | 1341 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1342 | "specified.\n", QTYPE2NAME(qtype)); |
1343 | kfree(qname); | |
1344 | return 0; | |
1345 | } | |
1346 | sbi->s_qf_names[qtype] = qname; | |
1347 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1348 | printk(KERN_ERR | |
617ba13b | 1349 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1350 | "filesystem root.\n"); |
1351 | kfree(sbi->s_qf_names[qtype]); | |
1352 | sbi->s_qf_names[qtype] = NULL; | |
1353 | return 0; | |
1354 | } | |
1355 | set_opt(sbi->s_mount_opt, QUOTA); | |
1356 | break; | |
1357 | case Opt_offusrjquota: | |
1358 | qtype = USRQUOTA; | |
1359 | goto clear_qf_name; | |
1360 | case Opt_offgrpjquota: | |
1361 | qtype = GRPQUOTA; | |
1362 | clear_qf_name: | |
17bd13b3 | 1363 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1364 | sbi->s_qf_names[qtype]) { |
617ba13b | 1365 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1366 | "journaled quota options when " |
ac27a0ec DK |
1367 | "quota turned on.\n"); |
1368 | return 0; | |
1369 | } | |
1370 | /* | |
1371 | * The space will be released later when all options | |
1372 | * are confirmed to be correct | |
1373 | */ | |
1374 | sbi->s_qf_names[qtype] = NULL; | |
1375 | break; | |
1376 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1377 | qfmt = QFMT_VFS_OLD; |
1378 | goto set_qf_format; | |
ac27a0ec | 1379 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1380 | qfmt = QFMT_VFS_V0; |
1381 | set_qf_format: | |
17bd13b3 | 1382 | if (sb_any_quota_loaded(sb) && |
dfc5d03f JK |
1383 | sbi->s_jquota_fmt != qfmt) { |
1384 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1385 | "journaled quota options when " | |
1386 | "quota turned on.\n"); | |
1387 | return 0; | |
1388 | } | |
1389 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1390 | break; |
1391 | case Opt_quota: | |
1392 | case Opt_usrquota: | |
1393 | set_opt(sbi->s_mount_opt, QUOTA); | |
1394 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1395 | break; | |
1396 | case Opt_grpquota: | |
1397 | set_opt(sbi->s_mount_opt, QUOTA); | |
1398 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1399 | break; | |
1400 | case Opt_noquota: | |
17bd13b3 | 1401 | if (sb_any_quota_loaded(sb)) { |
617ba13b | 1402 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1403 | "options when quota turned on.\n"); |
1404 | return 0; | |
1405 | } | |
1406 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1407 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1408 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1409 | break; | |
1410 | #else | |
1411 | case Opt_quota: | |
1412 | case Opt_usrquota: | |
1413 | case Opt_grpquota: | |
cd59e7b9 JK |
1414 | printk(KERN_ERR |
1415 | "EXT4-fs: quota options not supported.\n"); | |
1416 | break; | |
ac27a0ec DK |
1417 | case Opt_usrjquota: |
1418 | case Opt_grpjquota: | |
1419 | case Opt_offusrjquota: | |
1420 | case Opt_offgrpjquota: | |
1421 | case Opt_jqfmt_vfsold: | |
1422 | case Opt_jqfmt_vfsv0: | |
1423 | printk(KERN_ERR | |
cd59e7b9 | 1424 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1425 | "supported.\n"); |
1426 | break; | |
1427 | case Opt_noquota: | |
1428 | break; | |
1429 | #endif | |
1430 | case Opt_abort: | |
1431 | set_opt(sbi->s_mount_opt, ABORT); | |
1432 | break; | |
06705bff TT |
1433 | case Opt_nobarrier: |
1434 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1435 | break; | |
ac27a0ec | 1436 | case Opt_barrier: |
06705bff TT |
1437 | if (match_int(&args[0], &option)) { |
1438 | set_opt(sbi->s_mount_opt, BARRIER); | |
1439 | break; | |
1440 | } | |
ac27a0ec DK |
1441 | if (option) |
1442 | set_opt(sbi->s_mount_opt, BARRIER); | |
1443 | else | |
1444 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1445 | break; | |
1446 | case Opt_ignore: | |
1447 | break; | |
1448 | case Opt_resize: | |
1449 | if (!is_remount) { | |
617ba13b | 1450 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1451 | "for remount\n"); |
1452 | return 0; | |
1453 | } | |
1454 | if (match_int(&args[0], &option) != 0) | |
1455 | return 0; | |
1456 | *n_blocks_count = option; | |
1457 | break; | |
1458 | case Opt_nobh: | |
1459 | set_opt(sbi->s_mount_opt, NOBH); | |
1460 | break; | |
1461 | case Opt_bh: | |
1462 | clear_opt(sbi->s_mount_opt, NOBH); | |
1463 | break; | |
25ec56b5 JNC |
1464 | case Opt_i_version: |
1465 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1466 | sb->s_flags |= MS_I_VERSION; | |
1467 | break; | |
dd919b98 AK |
1468 | case Opt_nodelalloc: |
1469 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1470 | break; | |
c9de560d AT |
1471 | case Opt_stripe: |
1472 | if (match_int(&args[0], &option)) | |
1473 | return 0; | |
1474 | if (option < 0) | |
1475 | return 0; | |
1476 | sbi->s_stripe = option; | |
1477 | break; | |
64769240 AT |
1478 | case Opt_delalloc: |
1479 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1480 | break; | |
240799cd TT |
1481 | case Opt_inode_readahead_blks: |
1482 | if (match_int(&args[0], &option)) | |
1483 | return 0; | |
1484 | if (option < 0 || option > (1 << 30)) | |
1485 | return 0; | |
f7c43950 | 1486 | if (!is_power_of_2(option)) { |
3197ebdb TT |
1487 | printk(KERN_ERR "EXT4-fs: inode_readahead_blks" |
1488 | " must be a power of 2\n"); | |
1489 | return 0; | |
1490 | } | |
240799cd TT |
1491 | sbi->s_inode_readahead_blks = option; |
1492 | break; | |
b3881f74 TT |
1493 | case Opt_journal_ioprio: |
1494 | if (match_int(&args[0], &option)) | |
1495 | return 0; | |
1496 | if (option < 0 || option > 7) | |
1497 | break; | |
1498 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1499 | option); | |
1500 | break; | |
06705bff TT |
1501 | case Opt_noauto_da_alloc: |
1502 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1503 | break; | |
afd4672d | 1504 | case Opt_auto_da_alloc: |
06705bff TT |
1505 | if (match_int(&args[0], &option)) { |
1506 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1507 | break; | |
1508 | } | |
afd4672d TT |
1509 | if (option) |
1510 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1511 | else | |
1512 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1513 | break; | |
ac27a0ec | 1514 | default: |
2b2d6d01 TT |
1515 | printk(KERN_ERR |
1516 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1517 | "or missing value\n", p); | |
ac27a0ec DK |
1518 | return 0; |
1519 | } | |
1520 | } | |
1521 | #ifdef CONFIG_QUOTA | |
1522 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1523 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1524 | sbi->s_qf_names[USRQUOTA]) |
1525 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1526 | ||
617ba13b | 1527 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1528 | sbi->s_qf_names[GRPQUOTA]) |
1529 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1530 | ||
1531 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1532 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1533 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1534 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1535 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1536 | "format mixing.\n"); |
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1541 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1542 | "not specified.\n"); |
1543 | return 0; | |
1544 | } | |
1545 | } else { | |
1546 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1547 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1548 | "specified with no journaling " | |
ac27a0ec DK |
1549 | "enabled.\n"); |
1550 | return 0; | |
1551 | } | |
1552 | } | |
1553 | #endif | |
1554 | return 1; | |
1555 | } | |
1556 | ||
617ba13b | 1557 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1558 | int read_only) |
1559 | { | |
617ba13b | 1560 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1561 | int res = 0; |
1562 | ||
617ba13b | 1563 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1564 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1565 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1566 | res = MS_RDONLY; |
1567 | } | |
1568 | if (read_only) | |
1569 | return res; | |
617ba13b | 1570 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1571 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1572 | "running e2fsck is recommended\n"); | |
617ba13b | 1573 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1574 | printk(KERN_WARNING |
1575 | "EXT4-fs warning: mounting fs with errors, " | |
1576 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1577 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1578 | le16_to_cpu(es->s_mnt_count) >= | |
1579 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1580 | printk(KERN_WARNING |
1581 | "EXT4-fs warning: maximal mount count reached, " | |
1582 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1583 | else if (le32_to_cpu(es->s_checkinterval) && |
1584 | (le32_to_cpu(es->s_lastcheck) + | |
1585 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1586 | printk(KERN_WARNING |
1587 | "EXT4-fs warning: checktime reached, " | |
1588 | "running e2fsck is recommended\n"); | |
0390131b FM |
1589 | if (!sbi->s_journal) |
1590 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); | |
ac27a0ec | 1591 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1592 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1593 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1594 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1595 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1596 | if (sbi->s_journal) |
1597 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1598 | |
617ba13b | 1599 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 1600 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1601 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
ac27a0ec DK |
1602 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1603 | sb->s_blocksize, | |
1604 | sbi->s_groups_count, | |
617ba13b MC |
1605 | EXT4_BLOCKS_PER_GROUP(sb), |
1606 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1607 | sbi->s_mount_opt); |
1608 | ||
0390131b FM |
1609 | if (EXT4_SB(sb)->s_journal) { |
1610 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", | |
1611 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1612 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
1613 | } else { | |
1614 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); | |
1615 | } | |
ac27a0ec DK |
1616 | return res; |
1617 | } | |
1618 | ||
772cb7c8 JS |
1619 | static int ext4_fill_flex_info(struct super_block *sb) |
1620 | { | |
1621 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1622 | struct ext4_group_desc *gdp = NULL; | |
1623 | struct buffer_head *bh; | |
1624 | ext4_group_t flex_group_count; | |
1625 | ext4_group_t flex_group; | |
1626 | int groups_per_flex = 0; | |
c5ca7c76 | 1627 | size_t size; |
772cb7c8 JS |
1628 | int i; |
1629 | ||
1630 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1631 | sbi->s_log_groups_per_flex = 0; | |
1632 | return 1; | |
1633 | } | |
1634 | ||
1635 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1636 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1637 | ||
c62a11fd FB |
1638 | /* We allocate both existing and potentially added groups */ |
1639 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1640 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1641 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1642 | size = flex_group_count * sizeof(struct flex_groups); |
1643 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1644 | if (sbi->s_flex_groups == NULL) { | |
1645 | sbi->s_flex_groups = vmalloc(size); | |
1646 | if (sbi->s_flex_groups) | |
1647 | memset(sbi->s_flex_groups, 0, size); | |
1648 | } | |
772cb7c8 | 1649 | if (sbi->s_flex_groups == NULL) { |
ec05e868 | 1650 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
a9df9a49 | 1651 | "%u flex groups\n", flex_group_count); |
772cb7c8 JS |
1652 | goto failed; |
1653 | } | |
772cb7c8 | 1654 | |
772cb7c8 JS |
1655 | for (i = 0; i < sbi->s_groups_count; i++) { |
1656 | gdp = ext4_get_group_desc(sb, i, &bh); | |
1657 | ||
1658 | flex_group = ext4_flex_group(sbi, i); | |
9f24e420 TT |
1659 | atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, |
1660 | ext4_free_inodes_count(sb, gdp)); | |
1661 | atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, | |
1662 | ext4_free_blks_count(sb, gdp)); | |
7d39db14 TT |
1663 | atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, |
1664 | ext4_used_dirs_count(sb, gdp)); | |
772cb7c8 JS |
1665 | } |
1666 | ||
1667 | return 1; | |
1668 | failed: | |
1669 | return 0; | |
1670 | } | |
1671 | ||
717d50e4 AD |
1672 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1673 | struct ext4_group_desc *gdp) | |
1674 | { | |
1675 | __u16 crc = 0; | |
1676 | ||
1677 | if (sbi->s_es->s_feature_ro_compat & | |
1678 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1679 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1680 | __le32 le_group = cpu_to_le32(block_group); | |
1681 | ||
1682 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1683 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1684 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1685 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1686 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1687 | if ((sbi->s_es->s_feature_incompat & | |
1688 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1689 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1690 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1691 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1692 | offset); | |
1693 | } | |
1694 | ||
1695 | return cpu_to_le16(crc); | |
1696 | } | |
1697 | ||
1698 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1699 | struct ext4_group_desc *gdp) | |
1700 | { | |
1701 | if ((sbi->s_es->s_feature_ro_compat & | |
1702 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1703 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1704 | return 0; | |
1705 | ||
1706 | return 1; | |
1707 | } | |
1708 | ||
ac27a0ec | 1709 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1710 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1711 | { |
617ba13b MC |
1712 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1713 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1714 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1715 | ext4_fsblk_t block_bitmap; |
1716 | ext4_fsblk_t inode_bitmap; | |
1717 | ext4_fsblk_t inode_table; | |
ce421581 | 1718 | int flexbg_flag = 0; |
fd2d4291 | 1719 | ext4_group_t i; |
ac27a0ec | 1720 | |
ce421581 JS |
1721 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1722 | flexbg_flag = 1; | |
1723 | ||
af5bc92d | 1724 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1725 | |
197cd65a AM |
1726 | for (i = 0; i < sbi->s_groups_count; i++) { |
1727 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1728 | ||
ce421581 | 1729 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1730 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1731 | else |
1732 | last_block = first_block + | |
617ba13b | 1733 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1734 | |
8fadc143 | 1735 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1736 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 | 1737 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1738 | "Block bitmap for group %u not in group " |
5128273a | 1739 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1740 | return 0; |
1741 | } | |
8fadc143 | 1742 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1743 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 | 1744 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1745 | "Inode bitmap for group %u not in group " |
5128273a | 1746 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1747 | return 0; |
1748 | } | |
8fadc143 | 1749 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1750 | if (inode_table < first_block || |
2b2d6d01 | 1751 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 | 1752 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1753 | "Inode table for group %u not in group " |
5128273a | 1754 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1755 | return 0; |
1756 | } | |
b5f10eed | 1757 | spin_lock(sb_bgl_lock(sbi, i)); |
717d50e4 | 1758 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 | 1759 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1760 | "Checksum for group %u failed (%u!=%u)\n", |
c19204b0 JB |
1761 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
1762 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c LZ |
1763 | if (!(sb->s_flags & MS_RDONLY)) { |
1764 | spin_unlock(sb_bgl_lock(sbi, i)); | |
8a266467 | 1765 | return 0; |
7ee1ec4c | 1766 | } |
717d50e4 | 1767 | } |
b5f10eed | 1768 | spin_unlock(sb_bgl_lock(sbi, i)); |
ce421581 JS |
1769 | if (!flexbg_flag) |
1770 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1771 | } |
1772 | ||
bd81d8ee | 1773 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
2b2d6d01 | 1774 | sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1775 | return 1; |
1776 | } | |
1777 | ||
617ba13b | 1778 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1779 | * the superblock) which were deleted from all directories, but held open by |
1780 | * a process at the time of a crash. We walk the list and try to delete these | |
1781 | * inodes at recovery time (only with a read-write filesystem). | |
1782 | * | |
1783 | * In order to keep the orphan inode chain consistent during traversal (in | |
1784 | * case of crash during recovery), we link each inode into the superblock | |
1785 | * orphan list_head and handle it the same way as an inode deletion during | |
1786 | * normal operation (which journals the operations for us). | |
1787 | * | |
1788 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1789 | * accidentally point at an in-use or already deleted inode. The worst that | |
1790 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1791 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1792 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1793 | * inode cleanup for us, so we can safely abort without any further action. | |
1794 | */ | |
2b2d6d01 TT |
1795 | static void ext4_orphan_cleanup(struct super_block *sb, |
1796 | struct ext4_super_block *es) | |
ac27a0ec DK |
1797 | { |
1798 | unsigned int s_flags = sb->s_flags; | |
1799 | int nr_orphans = 0, nr_truncates = 0; | |
1800 | #ifdef CONFIG_QUOTA | |
1801 | int i; | |
1802 | #endif | |
1803 | if (!es->s_last_orphan) { | |
1804 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1805 | return; | |
1806 | } | |
1807 | ||
a8f48a95 ES |
1808 | if (bdev_read_only(sb->s_bdev)) { |
1809 | printk(KERN_ERR "EXT4-fs: write access " | |
1810 | "unavailable, skipping orphan cleanup.\n"); | |
1811 | return; | |
1812 | } | |
1813 | ||
617ba13b | 1814 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1815 | if (es->s_last_orphan) |
1816 | jbd_debug(1, "Errors on filesystem, " | |
1817 | "clearing orphan list.\n"); | |
1818 | es->s_last_orphan = 0; | |
1819 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1820 | return; | |
1821 | } | |
1822 | ||
1823 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1824 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1825 | sb->s_id); |
1826 | sb->s_flags &= ~MS_RDONLY; | |
1827 | } | |
1828 | #ifdef CONFIG_QUOTA | |
1829 | /* Needed for iput() to work correctly and not trash data */ | |
1830 | sb->s_flags |= MS_ACTIVE; | |
1831 | /* Turn on quotas so that they are updated correctly */ | |
1832 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1833 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1834 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1835 | if (ret < 0) |
1836 | printk(KERN_ERR | |
2c8be6b2 | 1837 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1838 | "quota: error %d\n", ret); |
1839 | } | |
1840 | } | |
1841 | #endif | |
1842 | ||
1843 | while (es->s_last_orphan) { | |
1844 | struct inode *inode; | |
1845 | ||
97bd42b9 JB |
1846 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1847 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1848 | es->s_last_orphan = 0; |
1849 | break; | |
1850 | } | |
1851 | ||
617ba13b | 1852 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 1853 | vfs_dq_init(inode); |
ac27a0ec DK |
1854 | if (inode->i_nlink) { |
1855 | printk(KERN_DEBUG | |
e5f8eab8 | 1856 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1857 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1858 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1859 | inode->i_ino, inode->i_size); |
617ba13b | 1860 | ext4_truncate(inode); |
ac27a0ec DK |
1861 | nr_truncates++; |
1862 | } else { | |
1863 | printk(KERN_DEBUG | |
1864 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1865 | __func__, inode->i_ino); |
ac27a0ec DK |
1866 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1867 | inode->i_ino); | |
1868 | nr_orphans++; | |
1869 | } | |
1870 | iput(inode); /* The delete magic happens here! */ | |
1871 | } | |
1872 | ||
2b2d6d01 | 1873 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1874 | |
1875 | if (nr_orphans) | |
617ba13b | 1876 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1877 | sb->s_id, PLURAL(nr_orphans)); |
1878 | if (nr_truncates) | |
617ba13b | 1879 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1880 | sb->s_id, PLURAL(nr_truncates)); |
1881 | #ifdef CONFIG_QUOTA | |
1882 | /* Turn quotas off */ | |
1883 | for (i = 0; i < MAXQUOTAS; i++) { | |
1884 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1885 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1886 | } |
1887 | #endif | |
1888 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1889 | } | |
cd2291a4 ES |
1890 | /* |
1891 | * Maximal extent format file size. | |
1892 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1893 | * extent format containers, within a sector_t, and within i_blocks | |
1894 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1895 | * so that won't be a limiting factor. | |
1896 | * | |
1897 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1898 | */ | |
f287a1a5 | 1899 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1900 | { |
1901 | loff_t res; | |
1902 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1903 | ||
1904 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1905 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1906 | /* |
b3a6ffe1 | 1907 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1908 | * i_block represent total blocks in 512 bytes |
1909 | * 32 == size of vfs inode i_blocks * 8 | |
1910 | */ | |
1911 | upper_limit = (1LL << 32) - 1; | |
1912 | ||
1913 | /* total blocks in file system block size */ | |
1914 | upper_limit >>= (blkbits - 9); | |
1915 | upper_limit <<= blkbits; | |
1916 | } | |
1917 | ||
1918 | /* 32-bit extent-start container, ee_block */ | |
1919 | res = 1LL << 32; | |
1920 | res <<= blkbits; | |
1921 | res -= 1; | |
1922 | ||
1923 | /* Sanity check against vm- & vfs- imposed limits */ | |
1924 | if (res > upper_limit) | |
1925 | res = upper_limit; | |
1926 | ||
1927 | return res; | |
1928 | } | |
ac27a0ec | 1929 | |
ac27a0ec | 1930 | /* |
cd2291a4 | 1931 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1932 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1933 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1934 | */ |
f287a1a5 | 1935 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1936 | { |
617ba13b | 1937 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1938 | int meta_blocks; |
1939 | loff_t upper_limit; | |
1940 | /* This is calculated to be the largest file size for a | |
cd2291a4 | 1941 | * dense, bitmapped file such that the total number of |
ac27a0ec | 1942 | * sectors in the file, including data and all indirect blocks, |
0fc1b451 AK |
1943 | * does not exceed 2^48 -1 |
1944 | * __u32 i_blocks_lo and _u16 i_blocks_high representing the | |
1945 | * total number of 512 bytes blocks of the file | |
1946 | */ | |
1947 | ||
f287a1a5 | 1948 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1949 | /* |
b3a6ffe1 | 1950 | * !has_huge_files or CONFIG_LBD is not enabled |
f287a1a5 TT |
1951 | * implies the inode i_block represent total blocks in |
1952 | * 512 bytes 32 == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1953 | */ |
1954 | upper_limit = (1LL << 32) - 1; | |
1955 | ||
1956 | /* total blocks in file system block size */ | |
1957 | upper_limit >>= (bits - 9); | |
1958 | ||
1959 | } else { | |
8180a562 AK |
1960 | /* |
1961 | * We use 48 bit ext4_inode i_blocks | |
1962 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
1963 | * represent total number of blocks in | |
1964 | * file system block size | |
1965 | */ | |
0fc1b451 AK |
1966 | upper_limit = (1LL << 48) - 1; |
1967 | ||
0fc1b451 AK |
1968 | } |
1969 | ||
1970 | /* indirect blocks */ | |
1971 | meta_blocks = 1; | |
1972 | /* double indirect blocks */ | |
1973 | meta_blocks += 1 + (1LL << (bits-2)); | |
1974 | /* tripple indirect blocks */ | |
1975 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
1976 | ||
1977 | upper_limit -= meta_blocks; | |
1978 | upper_limit <<= bits; | |
ac27a0ec DK |
1979 | |
1980 | res += 1LL << (bits-2); | |
1981 | res += 1LL << (2*(bits-2)); | |
1982 | res += 1LL << (3*(bits-2)); | |
1983 | res <<= bits; | |
1984 | if (res > upper_limit) | |
1985 | res = upper_limit; | |
0fc1b451 AK |
1986 | |
1987 | if (res > MAX_LFS_FILESIZE) | |
1988 | res = MAX_LFS_FILESIZE; | |
1989 | ||
ac27a0ec DK |
1990 | return res; |
1991 | } | |
1992 | ||
617ba13b | 1993 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
70bbb3e0 | 1994 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 1995 | { |
617ba13b | 1996 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 1997 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
1998 | int has_super = 0; |
1999 | ||
2000 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2001 | ||
617ba13b | 2002 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2003 | nr < first_meta_bg) |
70bbb3e0 | 2004 | return logical_sb_block + nr + 1; |
ac27a0ec | 2005 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2006 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2007 | has_super = 1; |
617ba13b | 2008 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2009 | } |
2010 | ||
c9de560d AT |
2011 | /** |
2012 | * ext4_get_stripe_size: Get the stripe size. | |
2013 | * @sbi: In memory super block info | |
2014 | * | |
2015 | * If we have specified it via mount option, then | |
2016 | * use the mount option value. If the value specified at mount time is | |
2017 | * greater than the blocks per group use the super block value. | |
2018 | * If the super block value is greater than blocks per group return 0. | |
2019 | * Allocator needs it be less than blocks per group. | |
2020 | * | |
2021 | */ | |
2022 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2023 | { | |
2024 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2025 | unsigned long stripe_width = | |
2026 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2027 | ||
2028 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2029 | return sbi->s_stripe; | |
2030 | ||
2031 | if (stripe_width <= sbi->s_blocks_per_group) | |
2032 | return stripe_width; | |
2033 | ||
2034 | if (stride <= sbi->s_blocks_per_group) | |
2035 | return stride; | |
2036 | ||
2037 | return 0; | |
2038 | } | |
ac27a0ec | 2039 | |
3197ebdb TT |
2040 | /* sysfs supprt */ |
2041 | ||
2042 | struct ext4_attr { | |
2043 | struct attribute attr; | |
2044 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2045 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2046 | const char *, size_t); | |
2047 | int offset; | |
2048 | }; | |
2049 | ||
2050 | static int parse_strtoul(const char *buf, | |
2051 | unsigned long max, unsigned long *value) | |
2052 | { | |
2053 | char *endp; | |
2054 | ||
2055 | while (*buf && isspace(*buf)) | |
2056 | buf++; | |
2057 | *value = simple_strtoul(buf, &endp, 0); | |
2058 | while (*endp && isspace(*endp)) | |
2059 | endp++; | |
2060 | if (*endp || *value > max) | |
2061 | return -EINVAL; | |
2062 | ||
2063 | return 0; | |
2064 | } | |
2065 | ||
2066 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2067 | struct ext4_sb_info *sbi, | |
2068 | char *buf) | |
2069 | { | |
2070 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2071 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2072 | } | |
2073 | ||
2074 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2075 | struct ext4_sb_info *sbi, char *buf) | |
2076 | { | |
2077 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2078 | ||
2079 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2080 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2081 | sbi->s_sectors_written_start) >> 1); | |
2082 | } | |
2083 | ||
2084 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2085 | struct ext4_sb_info *sbi, char *buf) | |
2086 | { | |
2087 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2088 | ||
2089 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2090 | sbi->s_kbytes_written + | |
2091 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2092 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
2093 | } | |
2094 | ||
2095 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2096 | struct ext4_sb_info *sbi, | |
2097 | const char *buf, size_t count) | |
2098 | { | |
2099 | unsigned long t; | |
2100 | ||
2101 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2102 | return -EINVAL; | |
2103 | ||
f7c43950 | 2104 | if (!is_power_of_2(t)) |
3197ebdb TT |
2105 | return -EINVAL; |
2106 | ||
2107 | sbi->s_inode_readahead_blks = t; | |
2108 | return count; | |
2109 | } | |
2110 | ||
2111 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
2112 | struct ext4_sb_info *sbi, char *buf) | |
2113 | { | |
2114 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2115 | ||
2116 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2117 | } | |
2118 | ||
2119 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2120 | struct ext4_sb_info *sbi, | |
2121 | const char *buf, size_t count) | |
2122 | { | |
2123 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2124 | unsigned long t; | |
2125 | ||
2126 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2127 | return -EINVAL; | |
2128 | *ui = t; | |
2129 | return count; | |
2130 | } | |
2131 | ||
2132 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2133 | static struct ext4_attr ext4_attr_##_name = { \ | |
2134 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2135 | .show = _show, \ | |
2136 | .store = _store, \ | |
2137 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2138 | } | |
2139 | #define EXT4_ATTR(name, mode, show, store) \ | |
2140 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2141 | ||
2142 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2143 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2144 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2145 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2146 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2147 | ||
2148 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2149 | EXT4_RO_ATTR(session_write_kbytes); | |
2150 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2151 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2152 | inode_readahead_blks_store, s_inode_readahead_blks); | |
2153 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); | |
2154 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2155 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2156 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2157 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2158 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
2159 | ||
2160 | static struct attribute *ext4_attrs[] = { | |
2161 | ATTR_LIST(delayed_allocation_blocks), | |
2162 | ATTR_LIST(session_write_kbytes), | |
2163 | ATTR_LIST(lifetime_write_kbytes), | |
2164 | ATTR_LIST(inode_readahead_blks), | |
2165 | ATTR_LIST(mb_stats), | |
2166 | ATTR_LIST(mb_max_to_scan), | |
2167 | ATTR_LIST(mb_min_to_scan), | |
2168 | ATTR_LIST(mb_order2_req), | |
2169 | ATTR_LIST(mb_stream_req), | |
2170 | ATTR_LIST(mb_group_prealloc), | |
2171 | NULL, | |
2172 | }; | |
2173 | ||
2174 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2175 | struct attribute *attr, char *buf) | |
2176 | { | |
2177 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2178 | s_kobj); | |
2179 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2180 | ||
2181 | return a->show ? a->show(a, sbi, buf) : 0; | |
2182 | } | |
2183 | ||
2184 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2185 | struct attribute *attr, | |
2186 | const char *buf, size_t len) | |
2187 | { | |
2188 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2189 | s_kobj); | |
2190 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2191 | ||
2192 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2193 | } | |
2194 | ||
2195 | static void ext4_sb_release(struct kobject *kobj) | |
2196 | { | |
2197 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2198 | s_kobj); | |
2199 | complete(&sbi->s_kobj_unregister); | |
2200 | } | |
2201 | ||
2202 | ||
2203 | static struct sysfs_ops ext4_attr_ops = { | |
2204 | .show = ext4_attr_show, | |
2205 | .store = ext4_attr_store, | |
2206 | }; | |
2207 | ||
2208 | static struct kobj_type ext4_ktype = { | |
2209 | .default_attrs = ext4_attrs, | |
2210 | .sysfs_ops = &ext4_attr_ops, | |
2211 | .release = ext4_sb_release, | |
2212 | }; | |
2213 | ||
2b2d6d01 | 2214 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2215 | __releases(kernel_lock) |
2216 | __acquires(kernel_lock) | |
1d03ec98 | 2217 | |
ac27a0ec | 2218 | { |
2b2d6d01 | 2219 | struct buffer_head *bh; |
617ba13b MC |
2220 | struct ext4_super_block *es = NULL; |
2221 | struct ext4_sb_info *sbi; | |
2222 | ext4_fsblk_t block; | |
2223 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2224 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2225 | unsigned long offset = 0; |
ac27a0ec DK |
2226 | unsigned long journal_devnum = 0; |
2227 | unsigned long def_mount_opts; | |
2228 | struct inode *root; | |
9f6200bb | 2229 | char *cp; |
0390131b | 2230 | const char *descr; |
1d1fe1ee | 2231 | int ret = -EINVAL; |
ac27a0ec | 2232 | int blocksize; |
4ec11028 TT |
2233 | unsigned int db_count; |
2234 | unsigned int i; | |
f287a1a5 | 2235 | int needs_recovery, has_huge_files; |
3a06d778 | 2236 | int features; |
bd81d8ee | 2237 | __u64 blocks_count; |
833f4077 | 2238 | int err; |
b3881f74 | 2239 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2240 | |
2241 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2242 | if (!sbi) | |
2243 | return -ENOMEM; | |
705895b6 PE |
2244 | |
2245 | sbi->s_blockgroup_lock = | |
2246 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2247 | if (!sbi->s_blockgroup_lock) { | |
2248 | kfree(sbi); | |
2249 | return -ENOMEM; | |
2250 | } | |
ac27a0ec DK |
2251 | sb->s_fs_info = sbi; |
2252 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2253 | sbi->s_resuid = EXT4_DEF_RESUID; |
2254 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2255 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2256 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2257 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2258 | sectors[1]); | |
ac27a0ec DK |
2259 | |
2260 | unlock_kernel(); | |
2261 | ||
9f6200bb TT |
2262 | /* Cleanup superblock name */ |
2263 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2264 | *cp = '!'; | |
2265 | ||
617ba13b | 2266 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2267 | if (!blocksize) { |
617ba13b | 2268 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
2269 | goto out_fail; |
2270 | } | |
2271 | ||
2272 | /* | |
617ba13b | 2273 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2274 | * block sizes. We need to calculate the offset from buffer start. |
2275 | */ | |
617ba13b | 2276 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2277 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2278 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2279 | } else { |
70bbb3e0 | 2280 | logical_sb_block = sb_block; |
ac27a0ec DK |
2281 | } |
2282 | ||
70bbb3e0 | 2283 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 2284 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
2285 | goto out_fail; |
2286 | } | |
2287 | /* | |
2288 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2289 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2290 | */ |
617ba13b | 2291 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2292 | sbi->s_es = es; |
2293 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2294 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2295 | goto cantfind_ext4; | |
afc32f7e | 2296 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2297 | |
2298 | /* Set defaults before we parse the mount options */ | |
2299 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2300 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2301 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2302 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2303 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2304 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2305 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2306 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2307 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2308 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2309 | #endif |
03010a33 | 2310 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2311 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2312 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2313 | #endif |
617ba13b MC |
2314 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2315 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2316 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2317 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2318 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2319 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2320 | ||
2321 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2322 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2323 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2324 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2325 | else |
2326 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2327 | |
2328 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2329 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2330 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2331 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2332 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 2333 | |
571640ca | 2334 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2335 | |
dd919b98 AK |
2336 | /* |
2337 | * enable delayed allocation by default | |
2338 | * Use -o nodelalloc to turn it off | |
2339 | */ | |
2340 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2341 | ||
2342 | ||
b3881f74 TT |
2343 | if (!parse_options((char *) data, sb, &journal_devnum, |
2344 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2345 | goto failed_mount; |
2346 | ||
2347 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2348 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2349 | |
617ba13b MC |
2350 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2351 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2352 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2353 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 2354 | printk(KERN_WARNING |
617ba13b | 2355 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 2356 | "running e2fsck is recommended\n"); |
469108ff | 2357 | |
ac27a0ec DK |
2358 | /* |
2359 | * Check feature flags regardless of the revision level, since we | |
2360 | * previously didn't change the revision level when setting the flags, | |
2361 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2362 | */ | |
617ba13b | 2363 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2364 | if (features) { |
617ba13b | 2365 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
3a06d778 AK |
2366 | "unsupported optional features (%x).\n", sb->s_id, |
2367 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2368 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
ac27a0ec DK |
2369 | goto failed_mount; |
2370 | } | |
617ba13b | 2371 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2372 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2373 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
3a06d778 AK |
2374 | "unsupported optional features (%x).\n", sb->s_id, |
2375 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2376 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
2377 | goto failed_mount; |
2378 | } | |
f287a1a5 TT |
2379 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2380 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2381 | if (has_huge_files) { | |
0fc1b451 AK |
2382 | /* |
2383 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2384 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2385 | */ |
2386 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2387 | !(sb->s_flags & MS_RDONLY)) { | |
2388 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2389 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2390 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2391 | goto failed_mount; |
2392 | } | |
2393 | } | |
ac27a0ec DK |
2394 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2395 | ||
617ba13b MC |
2396 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2397 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2398 | printk(KERN_ERR |
617ba13b | 2399 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2400 | blocksize, sb->s_id); |
2401 | goto failed_mount; | |
2402 | } | |
2403 | ||
ac27a0ec | 2404 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2405 | |
2406 | /* Validate the filesystem blocksize */ | |
2407 | if (!sb_set_blocksize(sb, blocksize)) { | |
2408 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2409 | blocksize); | |
ac27a0ec DK |
2410 | goto failed_mount; |
2411 | } | |
2412 | ||
2b2d6d01 | 2413 | brelse(bh); |
70bbb3e0 AM |
2414 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2415 | offset = do_div(logical_sb_block, blocksize); | |
2416 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2417 | if (!bh) { |
2418 | printk(KERN_ERR | |
617ba13b | 2419 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2420 | goto failed_mount; |
2421 | } | |
617ba13b | 2422 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2423 | sbi->s_es = es; |
617ba13b | 2424 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2425 | printk(KERN_ERR |
2426 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2427 | goto failed_mount; |
2428 | } | |
2429 | } | |
2430 | ||
f287a1a5 TT |
2431 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2432 | has_huge_files); | |
2433 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2434 | |
617ba13b MC |
2435 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2436 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2437 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2438 | } else { |
2439 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2440 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2441 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2442 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2443 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2444 | printk(KERN_ERR |
2445 | "EXT4-fs: unsupported inode size: %d\n", | |
2446 | sbi->s_inode_size); | |
ac27a0ec DK |
2447 | goto failed_mount; |
2448 | } | |
ef7f3835 KS |
2449 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2450 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2451 | } |
0d1ee42f AR |
2452 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2453 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2454 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2455 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2456 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2457 | printk(KERN_ERR |
8fadc143 | 2458 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2459 | sbi->s_desc_size); |
2460 | goto failed_mount; | |
2461 | } | |
2462 | } else | |
2463 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
ac27a0ec | 2464 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2465 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2466 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b MC |
2467 | goto cantfind_ext4; |
2468 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); | |
ac27a0ec | 2469 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2470 | goto cantfind_ext4; |
ac27a0ec DK |
2471 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2472 | sbi->s_inodes_per_block; | |
0d1ee42f | 2473 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2474 | sbi->s_sbh = bh; |
2475 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2476 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2477 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
2b2d6d01 | 2478 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2479 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2480 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2481 | i = le32_to_cpu(es->s_flags); |
2482 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2483 | sbi->s_hash_unsigned = 3; | |
2484 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2485 | #ifdef __CHAR_UNSIGNED__ | |
2486 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2487 | sbi->s_hash_unsigned = 3; | |
2488 | #else | |
2489 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2490 | #endif | |
2491 | sb->s_dirt = 1; | |
2492 | } | |
ac27a0ec DK |
2493 | |
2494 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2495 | printk(KERN_ERR |
2496 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2497 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2498 | goto failed_mount; |
2499 | } | |
ac27a0ec | 2500 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2501 | printk(KERN_ERR |
2502 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2503 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2504 | goto failed_mount; |
2505 | } | |
2506 | ||
bd81d8ee | 2507 | if (ext4_blocks_count(es) > |
ac27a0ec | 2508 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2509 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2510 | " too large to mount safely\n", sb->s_id); |
2511 | if (sizeof(sector_t) < 8) | |
617ba13b | 2512 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2513 | "enabled\n"); |
2514 | goto failed_mount; | |
2515 | } | |
2516 | ||
617ba13b MC |
2517 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2518 | goto cantfind_ext4; | |
e7c95593 | 2519 | |
0f2ddca6 FTN |
2520 | /* check blocks count against device size */ |
2521 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2522 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
2523 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu " | |
2524 | "exceeds size of device (%llu blocks)\n", | |
2525 | ext4_blocks_count(es), blocks_count); | |
2526 | goto failed_mount; | |
2527 | } | |
2528 | ||
4ec11028 TT |
2529 | /* |
2530 | * It makes no sense for the first data block to be beyond the end | |
2531 | * of the filesystem. | |
2532 | */ | |
2533 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
2534 | printk(KERN_WARNING "EXT4-fs: bad geometry: first data" | |
2535 | "block %u is beyond end of filesystem (%llu)\n", | |
2536 | le32_to_cpu(es->s_first_data_block), | |
2537 | ext4_blocks_count(es)); | |
e7c95593 ES |
2538 | goto failed_mount; |
2539 | } | |
bd81d8ee LV |
2540 | blocks_count = (ext4_blocks_count(es) - |
2541 | le32_to_cpu(es->s_first_data_block) + | |
2542 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2543 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 TT |
2544 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
2545 | printk(KERN_WARNING "EXT4-fs: groups count too large: %u " | |
2546 | "(block count %llu, first data block %u, " | |
2547 | "blocks per group %lu)\n", sbi->s_groups_count, | |
2548 | ext4_blocks_count(es), | |
2549 | le32_to_cpu(es->s_first_data_block), | |
2550 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2551 | goto failed_mount; | |
2552 | } | |
bd81d8ee | 2553 | sbi->s_groups_count = blocks_count; |
617ba13b MC |
2554 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2555 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2556 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2557 | GFP_KERNEL); |
2558 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2559 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2560 | goto failed_mount; |
2561 | } | |
2562 | ||
3244fcb1 | 2563 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2564 | if (ext4_proc_root) |
2565 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2566 | #endif |
240799cd | 2567 | |
705895b6 | 2568 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2569 | |
2570 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2571 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2572 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2573 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2574 | printk(KERN_ERR "EXT4-fs: " |
2575 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2576 | db_count = i; |
2577 | goto failed_mount2; | |
2578 | } | |
2579 | } | |
2b2d6d01 | 2580 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2581 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2582 | goto failed_mount2; |
2583 | } | |
772cb7c8 JS |
2584 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2585 | if (!ext4_fill_flex_info(sb)) { | |
2586 | printk(KERN_ERR | |
2587 | "EXT4-fs: unable to initialize " | |
2588 | "flex_bg meta info!\n"); | |
2589 | goto failed_mount2; | |
2590 | } | |
2591 | ||
ac27a0ec DK |
2592 | sbi->s_gdb_count = db_count; |
2593 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2594 | spin_lock_init(&sbi->s_next_gen_lock); | |
2595 | ||
833f4077 PZ |
2596 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2597 | ext4_count_free_blocks(sb)); | |
2598 | if (!err) { | |
2599 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2600 | ext4_count_free_inodes(sb)); | |
2601 | } | |
2602 | if (!err) { | |
2603 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2604 | ext4_count_dirs(sb)); | |
2605 | } | |
6bc6e63f AK |
2606 | if (!err) { |
2607 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2608 | } | |
833f4077 PZ |
2609 | if (err) { |
2610 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2611 | goto failed_mount3; | |
2612 | } | |
ac27a0ec | 2613 | |
c9de560d AT |
2614 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2615 | ||
ac27a0ec DK |
2616 | /* |
2617 | * set up enough so that it can read an inode | |
2618 | */ | |
617ba13b MC |
2619 | sb->s_op = &ext4_sops; |
2620 | sb->s_export_op = &ext4_export_ops; | |
2621 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2622 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2623 | sb->s_qcop = &ext4_qctl_operations; |
2624 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2625 | #endif |
2626 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
2627 | ||
2628 | sb->s_root = NULL; | |
2629 | ||
2630 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2631 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2632 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2633 | |
2634 | /* | |
2635 | * The first inode we look at is the journal inode. Don't try | |
2636 | * root first: it may be modified in the journal! | |
2637 | */ | |
2638 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2639 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2640 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2641 | goto failed_mount3; |
624080ed TT |
2642 | if (!(sb->s_flags & MS_RDONLY) && |
2643 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2644 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2645 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2646 | "%u is corrupt\n", sb->s_id, |
624080ed | 2647 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2648 | if (test_opt(sb, ERRORS_RO)) { |
2649 | printk(KERN_CRIT | |
2650 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2651 | sb->s_flags |= MS_RDONLY; |
2652 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2653 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2654 | } | |
2655 | if (test_opt(sb, ERRORS_PANIC)) { | |
2656 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2657 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2658 | ext4_commit_super(sb, es, 1); | |
624080ed TT |
2659 | goto failed_mount4; |
2660 | } | |
2661 | } | |
0390131b FM |
2662 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2663 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
2664 | printk(KERN_ERR "EXT4-fs: required journal recovery " | |
2665 | "suppressed and not mounted read-only\n"); | |
2666 | goto failed_mount4; | |
ac27a0ec | 2667 | } else { |
0390131b FM |
2668 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2669 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2670 | sbi->s_journal = NULL; | |
2671 | needs_recovery = 0; | |
2672 | goto no_journal; | |
ac27a0ec DK |
2673 | } |
2674 | ||
eb40a09c JS |
2675 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2676 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2677 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
abda1418 | 2678 | printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); |
eb40a09c JS |
2679 | goto failed_mount4; |
2680 | } | |
2681 | ||
818d276c GS |
2682 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2683 | jbd2_journal_set_features(sbi->s_journal, | |
2684 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2685 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2686 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2687 | jbd2_journal_set_features(sbi->s_journal, | |
2688 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2689 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2690 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2691 | } else { | |
2692 | jbd2_journal_clear_features(sbi->s_journal, | |
2693 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2694 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2695 | } | |
2696 | ||
ac27a0ec DK |
2697 | /* We have now updated the journal if required, so we can |
2698 | * validate the data journaling mode. */ | |
2699 | switch (test_opt(sb, DATA_FLAGS)) { | |
2700 | case 0: | |
2701 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2702 | * capabilities: ORDERED_DATA if the journal can |
2703 | * cope, else JOURNAL_DATA | |
2704 | */ | |
dab291af MC |
2705 | if (jbd2_journal_check_available_features |
2706 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2707 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2708 | else | |
2709 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2710 | break; | |
2711 | ||
617ba13b MC |
2712 | case EXT4_MOUNT_ORDERED_DATA: |
2713 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2714 | if (!jbd2_journal_check_available_features |
2715 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2716 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2717 | "requested data journaling mode\n"); |
2718 | goto failed_mount4; | |
2719 | } | |
2720 | default: | |
2721 | break; | |
2722 | } | |
b3881f74 | 2723 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2724 | |
0390131b | 2725 | no_journal: |
ac27a0ec DK |
2726 | |
2727 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2728 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2729 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2730 | "its supported only with writeback mode\n"); |
2731 | clear_opt(sbi->s_mount_opt, NOBH); | |
2732 | } | |
2733 | } | |
2734 | /* | |
dab291af | 2735 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2736 | * so we can safely mount the rest of the filesystem now. |
2737 | */ | |
2738 | ||
1d1fe1ee DH |
2739 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2740 | if (IS_ERR(root)) { | |
617ba13b | 2741 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2742 | ret = PTR_ERR(root); |
ac27a0ec DK |
2743 | goto failed_mount4; |
2744 | } | |
2745 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2746 | iput(root); |
617ba13b | 2747 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2748 | goto failed_mount4; |
2749 | } | |
1d1fe1ee DH |
2750 | sb->s_root = d_alloc_root(root); |
2751 | if (!sb->s_root) { | |
2752 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2753 | iput(root); | |
2754 | ret = -ENOMEM; | |
2755 | goto failed_mount4; | |
2756 | } | |
ac27a0ec | 2757 | |
2b2d6d01 | 2758 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2759 | |
2760 | /* determine the minimum size of new large inodes, if present */ | |
2761 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2762 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2763 | EXT4_GOOD_OLD_INODE_SIZE; | |
2764 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2765 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2766 | if (sbi->s_want_extra_isize < | |
2767 | le16_to_cpu(es->s_want_extra_isize)) | |
2768 | sbi->s_want_extra_isize = | |
2769 | le16_to_cpu(es->s_want_extra_isize); | |
2770 | if (sbi->s_want_extra_isize < | |
2771 | le16_to_cpu(es->s_min_extra_isize)) | |
2772 | sbi->s_want_extra_isize = | |
2773 | le16_to_cpu(es->s_min_extra_isize); | |
2774 | } | |
2775 | } | |
2776 | /* Check if enough inode space is available */ | |
2777 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2778 | sbi->s_inode_size) { | |
2779 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2780 | EXT4_GOOD_OLD_INODE_SIZE; | |
2781 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2782 | "available.\n"); | |
2783 | } | |
2784 | ||
c2774d84 AK |
2785 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2786 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2787 | "requested data journaling mode\n"); | |
2788 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2789 | } else if (test_opt(sb, DELALLOC)) | |
2790 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2791 | ||
2792 | ext4_ext_init(sb); | |
2793 | err = ext4_mb_init(sb, needs_recovery); | |
2794 | if (err) { | |
2795 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2796 | err); | |
2797 | goto failed_mount4; | |
2798 | } | |
2799 | ||
3197ebdb TT |
2800 | sbi->s_kobj.kset = ext4_kset; |
2801 | init_completion(&sbi->s_kobj_unregister); | |
2802 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
2803 | "%s", sb->s_id); | |
2804 | if (err) { | |
2805 | ext4_mb_release(sb); | |
2806 | ext4_ext_release(sb); | |
2807 | goto failed_mount4; | |
2808 | }; | |
2809 | ||
ac27a0ec DK |
2810 | /* |
2811 | * akpm: core read_super() calls in here with the superblock locked. | |
2812 | * That deadlocks, because orphan cleanup needs to lock the superblock | |
2813 | * in numerous places. Here we just pop the lock - it's relatively | |
2814 | * harmless, because we are now ready to accept write_super() requests, | |
2815 | * and aviro says that's the only reason for hanging onto the | |
2816 | * superblock lock. | |
2817 | */ | |
617ba13b MC |
2818 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2819 | ext4_orphan_cleanup(sb, es); | |
2820 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2821 | if (needs_recovery) { |
2b2d6d01 | 2822 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
0390131b FM |
2823 | ext4_mark_recovery_complete(sb, es); |
2824 | } | |
2825 | if (EXT4_SB(sb)->s_journal) { | |
2826 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2827 | descr = " journalled data mode"; | |
2828 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2829 | descr = " ordered data mode"; | |
2830 | else | |
2831 | descr = " writeback data mode"; | |
2832 | } else | |
2833 | descr = "out journal"; | |
2834 | ||
2835 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", | |
2836 | sb->s_id, descr); | |
ac27a0ec DK |
2837 | |
2838 | lock_kernel(); | |
2839 | return 0; | |
2840 | ||
617ba13b | 2841 | cantfind_ext4: |
ac27a0ec | 2842 | if (!silent) |
617ba13b | 2843 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2844 | sb->s_id); |
2845 | goto failed_mount; | |
2846 | ||
2847 | failed_mount4: | |
0390131b FM |
2848 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
2849 | if (sbi->s_journal) { | |
2850 | jbd2_journal_destroy(sbi->s_journal); | |
2851 | sbi->s_journal = NULL; | |
2852 | } | |
ac27a0ec | 2853 | failed_mount3: |
c5ca7c76 TT |
2854 | if (sbi->s_flex_groups) { |
2855 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
2856 | vfree(sbi->s_flex_groups); | |
2857 | else | |
2858 | kfree(sbi->s_flex_groups); | |
2859 | } | |
ac27a0ec DK |
2860 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
2861 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2862 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2863 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2864 | failed_mount2: |
2865 | for (i = 0; i < db_count; i++) | |
2866 | brelse(sbi->s_group_desc[i]); | |
2867 | kfree(sbi->s_group_desc); | |
2868 | failed_mount: | |
240799cd | 2869 | if (sbi->s_proc) { |
9f6200bb | 2870 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2871 | } |
ac27a0ec DK |
2872 | #ifdef CONFIG_QUOTA |
2873 | for (i = 0; i < MAXQUOTAS; i++) | |
2874 | kfree(sbi->s_qf_names[i]); | |
2875 | #endif | |
617ba13b | 2876 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2877 | brelse(bh); |
2878 | out_fail: | |
2879 | sb->s_fs_info = NULL; | |
2880 | kfree(sbi); | |
2881 | lock_kernel(); | |
1d1fe1ee | 2882 | return ret; |
ac27a0ec DK |
2883 | } |
2884 | ||
2885 | /* | |
2886 | * Setup any per-fs journal parameters now. We'll do this both on | |
2887 | * initial mount, once the journal has been initialised but before we've | |
2888 | * done any recovery; and again on any subsequent remount. | |
2889 | */ | |
617ba13b | 2890 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2891 | { |
617ba13b | 2892 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2893 | |
30773840 TT |
2894 | journal->j_commit_interval = sbi->s_commit_interval; |
2895 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2896 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2897 | |
2898 | spin_lock(&journal->j_state_lock); | |
2899 | if (test_opt(sb, BARRIER)) | |
dab291af | 2900 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2901 | else |
dab291af | 2902 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2903 | if (test_opt(sb, DATA_ERR_ABORT)) |
2904 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2905 | else | |
2906 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2907 | spin_unlock(&journal->j_state_lock); |
2908 | } | |
2909 | ||
617ba13b | 2910 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2911 | unsigned int journal_inum) |
2912 | { | |
2913 | struct inode *journal_inode; | |
2914 | journal_t *journal; | |
2915 | ||
0390131b FM |
2916 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2917 | ||
ac27a0ec DK |
2918 | /* First, test for the existence of a valid inode on disk. Bad |
2919 | * things happen if we iget() an unused inode, as the subsequent | |
2920 | * iput() will try to delete it. */ | |
2921 | ||
1d1fe1ee DH |
2922 | journal_inode = ext4_iget(sb, journal_inum); |
2923 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2924 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2925 | return NULL; |
2926 | } | |
2927 | if (!journal_inode->i_nlink) { | |
2928 | make_bad_inode(journal_inode); | |
2929 | iput(journal_inode); | |
617ba13b | 2930 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2931 | return NULL; |
2932 | } | |
2933 | ||
e5f8eab8 | 2934 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2935 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2936 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2937 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2938 | iput(journal_inode); |
2939 | return NULL; | |
2940 | } | |
2941 | ||
dab291af | 2942 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2943 | if (!journal) { |
617ba13b | 2944 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2945 | iput(journal_inode); |
2946 | return NULL; | |
2947 | } | |
2948 | journal->j_private = sb; | |
617ba13b | 2949 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
2950 | return journal; |
2951 | } | |
2952 | ||
617ba13b | 2953 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
2954 | dev_t j_dev) |
2955 | { | |
2b2d6d01 | 2956 | struct buffer_head *bh; |
ac27a0ec | 2957 | journal_t *journal; |
617ba13b MC |
2958 | ext4_fsblk_t start; |
2959 | ext4_fsblk_t len; | |
ac27a0ec | 2960 | int hblock, blocksize; |
617ba13b | 2961 | ext4_fsblk_t sb_block; |
ac27a0ec | 2962 | unsigned long offset; |
2b2d6d01 | 2963 | struct ext4_super_block *es; |
ac27a0ec DK |
2964 | struct block_device *bdev; |
2965 | ||
0390131b FM |
2966 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2967 | ||
617ba13b | 2968 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
2969 | if (bdev == NULL) |
2970 | return NULL; | |
2971 | ||
2972 | if (bd_claim(bdev, sb)) { | |
2973 | printk(KERN_ERR | |
abda1418 | 2974 | "EXT4-fs: failed to claim external journal device.\n"); |
9a1c3542 | 2975 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
2976 | return NULL; |
2977 | } | |
2978 | ||
2979 | blocksize = sb->s_blocksize; | |
2980 | hblock = bdev_hardsect_size(bdev); | |
2981 | if (blocksize < hblock) { | |
2982 | printk(KERN_ERR | |
617ba13b | 2983 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
2984 | goto out_bdev; |
2985 | } | |
2986 | ||
617ba13b MC |
2987 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
2988 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
2989 | set_blocksize(bdev, blocksize); |
2990 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 2991 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
2992 | "external journal\n"); |
2993 | goto out_bdev; | |
2994 | } | |
2995 | ||
617ba13b MC |
2996 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
2997 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 2998 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
2999 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
3000 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
3001 | "bad superblock\n"); |
3002 | brelse(bh); | |
3003 | goto out_bdev; | |
3004 | } | |
3005 | ||
617ba13b MC |
3006 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
3007 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
3008 | brelse(bh); |
3009 | goto out_bdev; | |
3010 | } | |
3011 | ||
bd81d8ee | 3012 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3013 | start = sb_block + 1; |
3014 | brelse(bh); /* we're done with the superblock */ | |
3015 | ||
dab291af | 3016 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3017 | start, len, blocksize); |
3018 | if (!journal) { | |
617ba13b | 3019 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
3020 | goto out_bdev; |
3021 | } | |
3022 | journal->j_private = sb; | |
3023 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3024 | wait_on_buffer(journal->j_sb_buffer); | |
3025 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 3026 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
3027 | goto out_journal; |
3028 | } | |
3029 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 3030 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
3031 | "user (unsupported) - %d\n", |
3032 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
3033 | goto out_journal; | |
3034 | } | |
617ba13b MC |
3035 | EXT4_SB(sb)->journal_bdev = bdev; |
3036 | ext4_init_journal_params(sb, journal); | |
ac27a0ec DK |
3037 | return journal; |
3038 | out_journal: | |
dab291af | 3039 | jbd2_journal_destroy(journal); |
ac27a0ec | 3040 | out_bdev: |
617ba13b | 3041 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3042 | return NULL; |
3043 | } | |
3044 | ||
617ba13b MC |
3045 | static int ext4_load_journal(struct super_block *sb, |
3046 | struct ext4_super_block *es, | |
ac27a0ec DK |
3047 | unsigned long journal_devnum) |
3048 | { | |
3049 | journal_t *journal; | |
3050 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3051 | dev_t journal_dev; | |
3052 | int err = 0; | |
3053 | int really_read_only; | |
3054 | ||
0390131b FM |
3055 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3056 | ||
ac27a0ec DK |
3057 | if (journal_devnum && |
3058 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 3059 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
3060 | "numbers have changed\n"); |
3061 | journal_dev = new_decode_dev(journal_devnum); | |
3062 | } else | |
3063 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3064 | ||
3065 | really_read_only = bdev_read_only(sb->s_bdev); | |
3066 | ||
3067 | /* | |
3068 | * Are we loading a blank journal or performing recovery after a | |
3069 | * crash? For recovery, we need to check in advance whether we | |
3070 | * can get read-write access to the device. | |
3071 | */ | |
3072 | ||
617ba13b | 3073 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3074 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 3075 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
3076 | "required on readonly filesystem.\n"); |
3077 | if (really_read_only) { | |
617ba13b | 3078 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
3079 | "unavailable, cannot proceed.\n"); |
3080 | return -EROFS; | |
3081 | } | |
2b2d6d01 TT |
3082 | printk(KERN_INFO "EXT4-fs: write access will " |
3083 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
3084 | } |
3085 | } | |
3086 | ||
3087 | if (journal_inum && journal_dev) { | |
617ba13b | 3088 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
3089 | "and inode journals!\n"); |
3090 | return -EINVAL; | |
3091 | } | |
3092 | ||
3093 | if (journal_inum) { | |
617ba13b | 3094 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3095 | return -EINVAL; |
3096 | } else { | |
617ba13b | 3097 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3098 | return -EINVAL; |
3099 | } | |
3100 | ||
4776004f TT |
3101 | if (journal->j_flags & JBD2_BARRIER) |
3102 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
3103 | else | |
3104 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
3105 | ||
ac27a0ec | 3106 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3107 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3108 | if (err) { |
617ba13b | 3109 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 3110 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3111 | return err; |
3112 | } | |
3113 | } | |
3114 | ||
617ba13b | 3115 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3116 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3117 | if (!err) |
dab291af | 3118 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3119 | |
3120 | if (err) { | |
617ba13b | 3121 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 3122 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3123 | return err; |
3124 | } | |
3125 | ||
617ba13b MC |
3126 | EXT4_SB(sb)->s_journal = journal; |
3127 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3128 | |
3129 | if (journal_devnum && | |
3130 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3131 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
3132 | sb->s_dirt = 1; | |
3133 | ||
3134 | /* Make sure we flush the recovery flag to disk. */ | |
617ba13b | 3135 | ext4_commit_super(sb, es, 1); |
ac27a0ec DK |
3136 | } |
3137 | ||
3138 | return 0; | |
3139 | } | |
3140 | ||
c4be0c1d | 3141 | static int ext4_commit_super(struct super_block *sb, |
2b2d6d01 | 3142 | struct ext4_super_block *es, int sync) |
ac27a0ec | 3143 | { |
617ba13b | 3144 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3145 | int error = 0; |
ac27a0ec DK |
3146 | |
3147 | if (!sbh) | |
c4be0c1d | 3148 | return error; |
914258bf TT |
3149 | if (buffer_write_io_error(sbh)) { |
3150 | /* | |
3151 | * Oh, dear. A previous attempt to write the | |
3152 | * superblock failed. This could happen because the | |
3153 | * USB device was yanked out. Or it could happen to | |
3154 | * be a transient write error and maybe the block will | |
3155 | * be remapped. Nothing we can do but to retry the | |
3156 | * write and hope for the best. | |
3157 | */ | |
abda1418 | 3158 | printk(KERN_ERR "EXT4-fs: previous I/O error to " |
914258bf TT |
3159 | "superblock detected for %s.\n", sb->s_id); |
3160 | clear_buffer_write_io_error(sbh); | |
3161 | set_buffer_uptodate(sbh); | |
3162 | } | |
ac27a0ec | 3163 | es->s_wtime = cpu_to_le32(get_seconds()); |
afc32f7e TT |
3164 | es->s_kbytes_written = |
3165 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3166 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3167 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3168 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3169 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3170 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3171 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
3172 | ||
ac27a0ec DK |
3173 | BUFFER_TRACE(sbh, "marking dirty"); |
3174 | mark_buffer_dirty(sbh); | |
914258bf | 3175 | if (sync) { |
c4be0c1d TS |
3176 | error = sync_dirty_buffer(sbh); |
3177 | if (error) | |
3178 | return error; | |
3179 | ||
3180 | error = buffer_write_io_error(sbh); | |
3181 | if (error) { | |
abda1418 | 3182 | printk(KERN_ERR "EXT4-fs: I/O error while writing " |
914258bf TT |
3183 | "superblock for %s.\n", sb->s_id); |
3184 | clear_buffer_write_io_error(sbh); | |
3185 | set_buffer_uptodate(sbh); | |
3186 | } | |
3187 | } | |
c4be0c1d | 3188 | return error; |
ac27a0ec DK |
3189 | } |
3190 | ||
3191 | ||
3192 | /* | |
3193 | * Have we just finished recovery? If so, and if we are mounting (or | |
3194 | * remounting) the filesystem readonly, then we will end up with a | |
3195 | * consistent fs on disk. Record that fact. | |
3196 | */ | |
2b2d6d01 TT |
3197 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3198 | struct ext4_super_block *es) | |
ac27a0ec | 3199 | { |
617ba13b | 3200 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3201 | |
0390131b FM |
3202 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3203 | BUG_ON(journal != NULL); | |
3204 | return; | |
3205 | } | |
dab291af | 3206 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3207 | if (jbd2_journal_flush(journal) < 0) |
3208 | goto out; | |
3209 | ||
32c37730 | 3210 | lock_super(sb); |
617ba13b | 3211 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3212 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3213 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 3214 | sb->s_dirt = 0; |
617ba13b | 3215 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 3216 | } |
32c37730 | 3217 | unlock_super(sb); |
7ffe1ea8 HK |
3218 | |
3219 | out: | |
dab291af | 3220 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3221 | } |
3222 | ||
3223 | /* | |
3224 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3225 | * has recorded an error from a previous lifetime, move that error to the | |
3226 | * main filesystem now. | |
3227 | */ | |
2b2d6d01 TT |
3228 | static void ext4_clear_journal_err(struct super_block *sb, |
3229 | struct ext4_super_block *es) | |
ac27a0ec DK |
3230 | { |
3231 | journal_t *journal; | |
3232 | int j_errno; | |
3233 | const char *errstr; | |
3234 | ||
0390131b FM |
3235 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3236 | ||
617ba13b | 3237 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3238 | |
3239 | /* | |
3240 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3241 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3242 | */ |
3243 | ||
dab291af | 3244 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3245 | if (j_errno) { |
3246 | char nbuf[16]; | |
3247 | ||
617ba13b | 3248 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 3249 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 3250 | "from previous mount: %s", errstr); |
46e665e9 | 3251 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
3252 | "filesystem check."); |
3253 | ||
617ba13b MC |
3254 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3255 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2b2d6d01 | 3256 | ext4_commit_super(sb, es, 1); |
ac27a0ec | 3257 | |
dab291af | 3258 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3259 | } |
3260 | } | |
3261 | ||
3262 | /* | |
3263 | * Force the running and committing transactions to commit, | |
3264 | * and wait on the commit. | |
3265 | */ | |
617ba13b | 3266 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3267 | { |
3268 | journal_t *journal; | |
0390131b | 3269 | int ret = 0; |
ac27a0ec DK |
3270 | |
3271 | if (sb->s_flags & MS_RDONLY) | |
3272 | return 0; | |
3273 | ||
617ba13b | 3274 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
3275 | if (journal) { |
3276 | sb->s_dirt = 0; | |
3277 | ret = ext4_journal_force_commit(journal); | |
3278 | } | |
3279 | ||
ac27a0ec DK |
3280 | return ret; |
3281 | } | |
3282 | ||
3283 | /* | |
617ba13b | 3284 | * Ext4 always journals updates to the superblock itself, so we don't |
ac27a0ec | 3285 | * have to propagate any other updates to the superblock on disk at this |
14ce0cb4 TT |
3286 | * point. (We can probably nuke this function altogether, and remove |
3287 | * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) | |
ac27a0ec | 3288 | */ |
2b2d6d01 | 3289 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3290 | { |
0390131b FM |
3291 | if (EXT4_SB(sb)->s_journal) { |
3292 | if (mutex_trylock(&sb->s_lock) != 0) | |
3293 | BUG(); | |
3294 | sb->s_dirt = 0; | |
3295 | } else { | |
3296 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
3297 | } | |
ac27a0ec DK |
3298 | } |
3299 | ||
617ba13b | 3300 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3301 | { |
14ce0cb4 | 3302 | int ret = 0; |
9eddacf9 | 3303 | tid_t target; |
ac27a0ec | 3304 | |
ede86cc4 | 3305 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
ac27a0ec | 3306 | sb->s_dirt = 0; |
0390131b | 3307 | if (EXT4_SB(sb)->s_journal) { |
9eddacf9 JK |
3308 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, |
3309 | &target)) { | |
3310 | if (wait) | |
3311 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, | |
3312 | target); | |
3313 | } | |
0390131b FM |
3314 | } else { |
3315 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); | |
3316 | } | |
14ce0cb4 | 3317 | return ret; |
ac27a0ec DK |
3318 | } |
3319 | ||
3320 | /* | |
3321 | * LVM calls this function before a (read-only) snapshot is created. This | |
3322 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3323 | */ | |
c4be0c1d | 3324 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3325 | { |
c4be0c1d TS |
3326 | int error = 0; |
3327 | journal_t *journal; | |
ac27a0ec DK |
3328 | sb->s_dirt = 0; |
3329 | ||
3330 | if (!(sb->s_flags & MS_RDONLY)) { | |
c4be0c1d | 3331 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3332 | |
0390131b FM |
3333 | if (journal) { |
3334 | /* Now we set up the journal barrier. */ | |
3335 | jbd2_journal_lock_updates(journal); | |
7ffe1ea8 | 3336 | |
0390131b FM |
3337 | /* |
3338 | * We don't want to clear needs_recovery flag when we | |
3339 | * failed to flush the journal. | |
3340 | */ | |
c4be0c1d TS |
3341 | error = jbd2_journal_flush(journal); |
3342 | if (error < 0) | |
3343 | goto out; | |
0390131b | 3344 | } |
ac27a0ec DK |
3345 | |
3346 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
617ba13b | 3347 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
c4be0c1d TS |
3348 | error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); |
3349 | if (error) | |
3350 | goto out; | |
ac27a0ec | 3351 | } |
c4be0c1d TS |
3352 | return 0; |
3353 | out: | |
3354 | jbd2_journal_unlock_updates(journal); | |
3355 | return error; | |
ac27a0ec DK |
3356 | } |
3357 | ||
3358 | /* | |
3359 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3360 | * flag here, even though the filesystem is not technically dirty yet. | |
3361 | */ | |
c4be0c1d | 3362 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3363 | { |
0390131b | 3364 | if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { |
ac27a0ec DK |
3365 | lock_super(sb); |
3366 | /* Reser the needs_recovery flag before the fs is unlocked. */ | |
617ba13b MC |
3367 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
3368 | ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); | |
ac27a0ec | 3369 | unlock_super(sb); |
dab291af | 3370 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
ac27a0ec | 3371 | } |
c4be0c1d | 3372 | return 0; |
ac27a0ec DK |
3373 | } |
3374 | ||
2b2d6d01 | 3375 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3376 | { |
2b2d6d01 | 3377 | struct ext4_super_block *es; |
617ba13b MC |
3378 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3379 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3380 | unsigned long old_sb_flags; |
617ba13b | 3381 | struct ext4_mount_options old_opts; |
8a266467 | 3382 | ext4_group_t g; |
b3881f74 | 3383 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3384 | int err; |
3385 | #ifdef CONFIG_QUOTA | |
3386 | int i; | |
3387 | #endif | |
3388 | ||
3389 | /* Store the original options */ | |
3390 | old_sb_flags = sb->s_flags; | |
3391 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3392 | old_opts.s_resuid = sbi->s_resuid; | |
3393 | old_opts.s_resgid = sbi->s_resgid; | |
3394 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3395 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3396 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3397 | #ifdef CONFIG_QUOTA |
3398 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3399 | for (i = 0; i < MAXQUOTAS; i++) | |
3400 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3401 | #endif | |
b3881f74 TT |
3402 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3403 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3404 | |
3405 | /* | |
3406 | * Allow the "check" option to be passed as a remount option. | |
3407 | */ | |
b3881f74 TT |
3408 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3409 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3410 | err = -EINVAL; |
3411 | goto restore_opts; | |
3412 | } | |
3413 | ||
617ba13b | 3414 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 3415 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3416 | |
3417 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3418 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3419 | |
3420 | es = sbi->s_es; | |
3421 | ||
b3881f74 | 3422 | if (sbi->s_journal) { |
0390131b | 3423 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3424 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3425 | } | |
ac27a0ec DK |
3426 | |
3427 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3428 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3429 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3430 | err = -EROFS; |
3431 | goto restore_opts; | |
3432 | } | |
3433 | ||
3434 | if (*flags & MS_RDONLY) { | |
3435 | /* | |
3436 | * First of all, the unconditional stuff we have to do | |
3437 | * to disable replay of the journal when we next remount | |
3438 | */ | |
3439 | sb->s_flags |= MS_RDONLY; | |
3440 | ||
3441 | /* | |
3442 | * OK, test if we are remounting a valid rw partition | |
3443 | * readonly, and if so set the rdonly flag and then | |
3444 | * mark the partition as valid again. | |
3445 | */ | |
617ba13b MC |
3446 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3447 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3448 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3449 | ||
32c37730 JK |
3450 | /* |
3451 | * We have to unlock super so that we can wait for | |
3452 | * transactions. | |
3453 | */ | |
0390131b FM |
3454 | if (sbi->s_journal) { |
3455 | unlock_super(sb); | |
3456 | ext4_mark_recovery_complete(sb, es); | |
3457 | lock_super(sb); | |
3458 | } | |
ac27a0ec | 3459 | } else { |
3a06d778 | 3460 | int ret; |
617ba13b MC |
3461 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3462 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3463 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec | 3464 | "remount RDWR because of unsupported " |
3a06d778 AK |
3465 | "optional features (%x).\n", sb->s_id, |
3466 | (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & | |
3467 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
3468 | err = -EROFS; |
3469 | goto restore_opts; | |
3470 | } | |
ead6596b | 3471 | |
8a266467 TT |
3472 | /* |
3473 | * Make sure the group descriptor checksums | |
3474 | * are sane. If they aren't, refuse to | |
3475 | * remount r/w. | |
3476 | */ | |
3477 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3478 | struct ext4_group_desc *gdp = | |
3479 | ext4_get_group_desc(sb, g, NULL); | |
3480 | ||
3481 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3482 | printk(KERN_ERR | |
3483 | "EXT4-fs: ext4_remount: " | |
a9df9a49 | 3484 | "Checksum for group %u failed (%u!=%u)\n", |
8a266467 TT |
3485 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3486 | le16_to_cpu(gdp->bg_checksum)); | |
3487 | err = -EINVAL; | |
3488 | goto restore_opts; | |
3489 | } | |
3490 | } | |
3491 | ||
ead6596b ES |
3492 | /* |
3493 | * If we have an unprocessed orphan list hanging | |
3494 | * around from a previously readonly bdev mount, | |
3495 | * require a full umount/remount for now. | |
3496 | */ | |
3497 | if (es->s_last_orphan) { | |
3498 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3499 | "remount RDWR because of unprocessed " | |
3500 | "orphan inode list. Please " | |
3501 | "umount/remount instead.\n", | |
3502 | sb->s_id); | |
3503 | err = -EINVAL; | |
3504 | goto restore_opts; | |
3505 | } | |
3506 | ||
ac27a0ec DK |
3507 | /* |
3508 | * Mounting a RDONLY partition read-write, so reread | |
3509 | * and store the current valid flag. (It may have | |
3510 | * been changed by e2fsck since we originally mounted | |
3511 | * the partition.) | |
3512 | */ | |
0390131b FM |
3513 | if (sbi->s_journal) |
3514 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3515 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3516 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3517 | goto restore_opts; |
2b2d6d01 | 3518 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3519 | sb->s_flags &= ~MS_RDONLY; |
3520 | } | |
3521 | } | |
0390131b FM |
3522 | if (sbi->s_journal == NULL) |
3523 | ext4_commit_super(sb, es, 1); | |
3524 | ||
ac27a0ec DK |
3525 | #ifdef CONFIG_QUOTA |
3526 | /* Release old quota file names */ | |
3527 | for (i = 0; i < MAXQUOTAS; i++) | |
3528 | if (old_opts.s_qf_names[i] && | |
3529 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3530 | kfree(old_opts.s_qf_names[i]); | |
3531 | #endif | |
3532 | return 0; | |
3533 | restore_opts: | |
3534 | sb->s_flags = old_sb_flags; | |
3535 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3536 | sbi->s_resuid = old_opts.s_resuid; | |
3537 | sbi->s_resgid = old_opts.s_resgid; | |
3538 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3539 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3540 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3541 | #ifdef CONFIG_QUOTA |
3542 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3543 | for (i = 0; i < MAXQUOTAS; i++) { | |
3544 | if (sbi->s_qf_names[i] && | |
3545 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3546 | kfree(sbi->s_qf_names[i]); | |
3547 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3548 | } | |
3549 | #endif | |
3550 | return err; | |
3551 | } | |
3552 | ||
2b2d6d01 | 3553 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3554 | { |
3555 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3556 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3557 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3558 | u64 fsid; |
ac27a0ec | 3559 | |
5e70030d BP |
3560 | if (test_opt(sb, MINIX_DF)) { |
3561 | sbi->s_overhead_last = 0; | |
6bc9feff | 3562 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
fd2d4291 | 3563 | ext4_group_t ngroups = sbi->s_groups_count, i; |
5e70030d | 3564 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3565 | smp_rmb(); |
3566 | ||
3567 | /* | |
5e70030d BP |
3568 | * Compute the overhead (FS structures). This is constant |
3569 | * for a given filesystem unless the number of block groups | |
3570 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3571 | */ |
3572 | ||
3573 | /* | |
3574 | * All of the blocks before first_data_block are | |
3575 | * overhead | |
3576 | */ | |
3577 | overhead = le32_to_cpu(es->s_first_data_block); | |
3578 | ||
3579 | /* | |
3580 | * Add the overhead attributed to the superblock and | |
3581 | * block group descriptors. If the sparse superblocks | |
3582 | * feature is turned on, then not all groups have this. | |
3583 | */ | |
3584 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3585 | overhead += ext4_bg_has_super(sb, i) + |
3586 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3587 | cond_resched(); |
3588 | } | |
3589 | ||
3590 | /* | |
3591 | * Every block group has an inode bitmap, a block | |
3592 | * bitmap, and an inode table. | |
3593 | */ | |
5e70030d BP |
3594 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3595 | sbi->s_overhead_last = overhead; | |
3596 | smp_wmb(); | |
6bc9feff | 3597 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3598 | } |
3599 | ||
617ba13b | 3600 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3601 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3602 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3603 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3604 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3605 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3606 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3607 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3608 | buf->f_bavail = 0; |
3609 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3610 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3611 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3612 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3613 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3614 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3615 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3616 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
ac27a0ec DK |
3617 | return 0; |
3618 | } | |
3619 | ||
3620 | /* Helper function for writing quotas on sync - we need to start transaction before quota file | |
3621 | * is locked for write. Otherwise the are possible deadlocks: | |
3622 | * Process 1 Process 2 | |
617ba13b | 3623 | * ext4_create() quota_sync() |
a269eb18 JK |
3624 | * jbd2_journal_start() write_dquot() |
3625 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3626 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3627 | * |
3628 | */ | |
3629 | ||
3630 | #ifdef CONFIG_QUOTA | |
3631 | ||
3632 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3633 | { | |
3634 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3635 | } | |
3636 | ||
617ba13b | 3637 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3638 | { |
3639 | int ret, err; | |
3640 | handle_t *handle; | |
3641 | struct inode *inode; | |
3642 | ||
3643 | inode = dquot_to_inode(dquot); | |
617ba13b MC |
3644 | handle = ext4_journal_start(inode, |
3645 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3646 | if (IS_ERR(handle)) |
3647 | return PTR_ERR(handle); | |
3648 | ret = dquot_commit(dquot); | |
617ba13b | 3649 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3650 | if (!ret) |
3651 | ret = err; | |
3652 | return ret; | |
3653 | } | |
3654 | ||
617ba13b | 3655 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3656 | { |
3657 | int ret, err; | |
3658 | handle_t *handle; | |
3659 | ||
617ba13b MC |
3660 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3661 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); | |
ac27a0ec DK |
3662 | if (IS_ERR(handle)) |
3663 | return PTR_ERR(handle); | |
3664 | ret = dquot_acquire(dquot); | |
617ba13b | 3665 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3666 | if (!ret) |
3667 | ret = err; | |
3668 | return ret; | |
3669 | } | |
3670 | ||
617ba13b | 3671 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3672 | { |
3673 | int ret, err; | |
3674 | handle_t *handle; | |
3675 | ||
617ba13b MC |
3676 | handle = ext4_journal_start(dquot_to_inode(dquot), |
3677 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); | |
9c3013e9 JK |
3678 | if (IS_ERR(handle)) { |
3679 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3680 | dquot_release(dquot); | |
ac27a0ec | 3681 | return PTR_ERR(handle); |
9c3013e9 | 3682 | } |
ac27a0ec | 3683 | ret = dquot_release(dquot); |
617ba13b | 3684 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3685 | if (!ret) |
3686 | ret = err; | |
3687 | return ret; | |
3688 | } | |
3689 | ||
617ba13b | 3690 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3691 | { |
2c8be6b2 | 3692 | /* Are we journaling quotas? */ |
617ba13b MC |
3693 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3694 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3695 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3696 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3697 | } else { |
3698 | return dquot_mark_dquot_dirty(dquot); | |
3699 | } | |
3700 | } | |
3701 | ||
617ba13b | 3702 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3703 | { |
3704 | int ret, err; | |
3705 | handle_t *handle; | |
3706 | ||
3707 | /* Data block + inode block */ | |
617ba13b | 3708 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3709 | if (IS_ERR(handle)) |
3710 | return PTR_ERR(handle); | |
3711 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3712 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3713 | if (!ret) |
3714 | ret = err; | |
3715 | return ret; | |
3716 | } | |
3717 | ||
3718 | /* | |
3719 | * Turn on quotas during mount time - we need to find | |
3720 | * the quota file and such... | |
3721 | */ | |
617ba13b | 3722 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3723 | { |
617ba13b MC |
3724 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3725 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3726 | } |
3727 | ||
3728 | /* | |
3729 | * Standard function to be called on quota_on | |
3730 | */ | |
617ba13b | 3731 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3732 | char *name, int remount) |
ac27a0ec DK |
3733 | { |
3734 | int err; | |
8264613d | 3735 | struct path path; |
ac27a0ec DK |
3736 | |
3737 | if (!test_opt(sb, QUOTA)) | |
3738 | return -EINVAL; | |
8264613d | 3739 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3740 | if (remount) |
8264613d | 3741 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3742 | |
8264613d | 3743 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3744 | if (err) |
3745 | return err; | |
0623543b | 3746 | |
ac27a0ec | 3747 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3748 | if (path.mnt->mnt_sb != sb) { |
3749 | path_put(&path); | |
ac27a0ec DK |
3750 | return -EXDEV; |
3751 | } | |
0623543b JK |
3752 | /* Journaling quota? */ |
3753 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3754 | /* Quotafile not in fs root? */ |
8264613d | 3755 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3756 | printk(KERN_WARNING |
3757 | "EXT4-fs: Quota file not on filesystem root. " | |
3758 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3759 | } |
0623543b JK |
3760 | |
3761 | /* | |
3762 | * When we journal data on quota file, we have to flush journal to see | |
3763 | * all updates to the file when we bypass pagecache... | |
3764 | */ | |
0390131b FM |
3765 | if (EXT4_SB(sb)->s_journal && |
3766 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3767 | /* |
3768 | * We don't need to lock updates but journal_flush() could | |
3769 | * otherwise be livelocked... | |
3770 | */ | |
3771 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3772 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3773 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3774 | if (err) { |
8264613d | 3775 | path_put(&path); |
7ffe1ea8 HK |
3776 | return err; |
3777 | } | |
0623543b JK |
3778 | } |
3779 | ||
8264613d AV |
3780 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3781 | path_put(&path); | |
77e69dac | 3782 | return err; |
ac27a0ec DK |
3783 | } |
3784 | ||
3785 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3786 | * acquiring the locks... As quota files are never truncated and quota code | |
3787 | * itself serializes the operations (and noone else should touch the files) | |
3788 | * we don't have to be afraid of races */ | |
617ba13b | 3789 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3790 | size_t len, loff_t off) |
3791 | { | |
3792 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3793 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3794 | int err = 0; |
3795 | int offset = off & (sb->s_blocksize - 1); | |
3796 | int tocopy; | |
3797 | size_t toread; | |
3798 | struct buffer_head *bh; | |
3799 | loff_t i_size = i_size_read(inode); | |
3800 | ||
3801 | if (off > i_size) | |
3802 | return 0; | |
3803 | if (off+len > i_size) | |
3804 | len = i_size-off; | |
3805 | toread = len; | |
3806 | while (toread > 0) { | |
3807 | tocopy = sb->s_blocksize - offset < toread ? | |
3808 | sb->s_blocksize - offset : toread; | |
617ba13b | 3809 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3810 | if (err) |
3811 | return err; | |
3812 | if (!bh) /* A hole? */ | |
3813 | memset(data, 0, tocopy); | |
3814 | else | |
3815 | memcpy(data, bh->b_data+offset, tocopy); | |
3816 | brelse(bh); | |
3817 | offset = 0; | |
3818 | toread -= tocopy; | |
3819 | data += tocopy; | |
3820 | blk++; | |
3821 | } | |
3822 | return len; | |
3823 | } | |
3824 | ||
3825 | /* Write to quotafile (we know the transaction is already started and has | |
3826 | * enough credits) */ | |
617ba13b | 3827 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3828 | const char *data, size_t len, loff_t off) |
3829 | { | |
3830 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3831 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3832 | int err = 0; |
3833 | int offset = off & (sb->s_blocksize - 1); | |
3834 | int tocopy; | |
617ba13b | 3835 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3836 | size_t towrite = len; |
3837 | struct buffer_head *bh; | |
3838 | handle_t *handle = journal_current_handle(); | |
3839 | ||
0390131b | 3840 | if (EXT4_SB(sb)->s_journal && !handle) { |
e5f8eab8 | 3841 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3842 | " cancelled because transaction is not started.\n", |
3843 | (unsigned long long)off, (unsigned long long)len); | |
3844 | return -EIO; | |
3845 | } | |
ac27a0ec DK |
3846 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3847 | while (towrite > 0) { | |
3848 | tocopy = sb->s_blocksize - offset < towrite ? | |
3849 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3850 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3851 | if (!bh) |
3852 | goto out; | |
3853 | if (journal_quota) { | |
617ba13b | 3854 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3855 | if (err) { |
3856 | brelse(bh); | |
3857 | goto out; | |
3858 | } | |
3859 | } | |
3860 | lock_buffer(bh); | |
3861 | memcpy(bh->b_data+offset, data, tocopy); | |
3862 | flush_dcache_page(bh->b_page); | |
3863 | unlock_buffer(bh); | |
3864 | if (journal_quota) | |
0390131b | 3865 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3866 | else { |
3867 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3868 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3869 | mark_buffer_dirty(bh); |
3870 | } | |
3871 | brelse(bh); | |
3872 | if (err) | |
3873 | goto out; | |
3874 | offset = 0; | |
3875 | towrite -= tocopy; | |
3876 | data += tocopy; | |
3877 | blk++; | |
3878 | } | |
3879 | out: | |
4d04e4fb JK |
3880 | if (len == towrite) { |
3881 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3882 | return err; |
4d04e4fb | 3883 | } |
ac27a0ec DK |
3884 | if (inode->i_size < off+len-towrite) { |
3885 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3886 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3887 | } |
ac27a0ec | 3888 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3889 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3890 | mutex_unlock(&inode->i_mutex); |
3891 | return len - towrite; | |
3892 | } | |
3893 | ||
3894 | #endif | |
3895 | ||
617ba13b | 3896 | static int ext4_get_sb(struct file_system_type *fs_type, |
ac27a0ec DK |
3897 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
3898 | { | |
617ba13b | 3899 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); |
ac27a0ec DK |
3900 | } |
3901 | ||
03010a33 TT |
3902 | static struct file_system_type ext4_fs_type = { |
3903 | .owner = THIS_MODULE, | |
3904 | .name = "ext4", | |
3905 | .get_sb = ext4_get_sb, | |
3906 | .kill_sb = kill_block_super, | |
3907 | .fs_flags = FS_REQUIRES_DEV, | |
3908 | }; | |
3909 | ||
3910 | #ifdef CONFIG_EXT4DEV_COMPAT | |
3911 | static int ext4dev_get_sb(struct file_system_type *fs_type, | |
3912 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
3913 | { | |
3914 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3915 | "to mount using ext4\n"); | |
3916 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3917 | "will go away by 2.6.31\n"); | |
3918 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); | |
3919 | } | |
3920 | ||
617ba13b | 3921 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3922 | .owner = THIS_MODULE, |
617ba13b | 3923 | .name = "ext4dev", |
03010a33 | 3924 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3925 | .kill_sb = kill_block_super, |
3926 | .fs_flags = FS_REQUIRES_DEV, | |
3927 | }; | |
03010a33 TT |
3928 | MODULE_ALIAS("ext4dev"); |
3929 | #endif | |
ac27a0ec | 3930 | |
617ba13b | 3931 | static int __init init_ext4_fs(void) |
ac27a0ec | 3932 | { |
c9de560d AT |
3933 | int err; |
3934 | ||
3197ebdb TT |
3935 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
3936 | if (!ext4_kset) | |
3937 | return -ENOMEM; | |
9f6200bb | 3938 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3939 | err = init_ext4_mballoc(); |
ac27a0ec DK |
3940 | if (err) |
3941 | return err; | |
c9de560d AT |
3942 | |
3943 | err = init_ext4_xattr(); | |
3944 | if (err) | |
3945 | goto out2; | |
ac27a0ec DK |
3946 | err = init_inodecache(); |
3947 | if (err) | |
3948 | goto out1; | |
03010a33 | 3949 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3950 | if (err) |
3951 | goto out; | |
03010a33 TT |
3952 | #ifdef CONFIG_EXT4DEV_COMPAT |
3953 | err = register_filesystem(&ext4dev_fs_type); | |
3954 | if (err) { | |
3955 | unregister_filesystem(&ext4_fs_type); | |
3956 | goto out; | |
3957 | } | |
3958 | #endif | |
ac27a0ec DK |
3959 | return 0; |
3960 | out: | |
3961 | destroy_inodecache(); | |
3962 | out1: | |
617ba13b | 3963 | exit_ext4_xattr(); |
c9de560d AT |
3964 | out2: |
3965 | exit_ext4_mballoc(); | |
ac27a0ec DK |
3966 | return err; |
3967 | } | |
3968 | ||
617ba13b | 3969 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3970 | { |
03010a33 TT |
3971 | unregister_filesystem(&ext4_fs_type); |
3972 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 3973 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 3974 | #endif |
ac27a0ec | 3975 | destroy_inodecache(); |
617ba13b | 3976 | exit_ext4_xattr(); |
c9de560d | 3977 | exit_ext4_mballoc(); |
9f6200bb | 3978 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 3979 | kset_unregister(ext4_kset); |
ac27a0ec DK |
3980 | } |
3981 | ||
3982 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 3983 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 3984 | MODULE_LICENSE("GPL"); |
617ba13b MC |
3985 | module_init(init_ext4_fs) |
3986 | module_exit(exit_ext4_fs) |