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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" | |
ac27a0ec | 49 | |
f4033903 CW |
50 | static int default_mb_history_length = 1000; |
51 | ||
52 | module_param_named(default_mb_history_length, default_mb_history_length, | |
53 | int, 0644); | |
54 | MODULE_PARM_DESC(default_mb_history_length, | |
55 | "Default number of entries saved for mb_history"); | |
56 | ||
9f6200bb | 57 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 58 | static struct kset *ext4_kset; |
9f6200bb | 59 | |
617ba13b | 60 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 61 | unsigned long journal_devnum); |
e2d67052 | 62 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
63 | static void ext4_mark_recovery_complete(struct super_block *sb, |
64 | struct ext4_super_block *es); | |
65 | static void ext4_clear_journal_err(struct super_block *sb, | |
66 | struct ext4_super_block *es); | |
617ba13b | 67 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 68 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 69 | char nbuf[16]); |
2b2d6d01 TT |
70 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
71 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 72 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 73 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 74 | static int ext4_freeze(struct super_block *sb); |
ac27a0ec | 75 | |
bd81d8ee | 76 | |
8fadc143 AR |
77 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
78 | struct ext4_group_desc *bg) | |
bd81d8ee | 79 | { |
3a14589c | 80 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 81 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 82 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
83 | } |
84 | ||
8fadc143 AR |
85 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
86 | struct ext4_group_desc *bg) | |
bd81d8ee | 87 | { |
5272f837 | 88 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 89 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 90 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
91 | } |
92 | ||
8fadc143 AR |
93 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
94 | struct ext4_group_desc *bg) | |
bd81d8ee | 95 | { |
5272f837 | 96 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 97 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 98 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
99 | } |
100 | ||
560671a0 AK |
101 | __u32 ext4_free_blks_count(struct super_block *sb, |
102 | struct ext4_group_desc *bg) | |
103 | { | |
104 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
105 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 106 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
107 | } |
108 | ||
109 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
110 | struct ext4_group_desc *bg) | |
111 | { | |
112 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
113 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 114 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
115 | } |
116 | ||
117 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
118 | struct ext4_group_desc *bg) | |
119 | { | |
120 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
121 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 122 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
123 | } |
124 | ||
125 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
126 | struct ext4_group_desc *bg) | |
127 | { | |
128 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
129 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 130 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
131 | } |
132 | ||
8fadc143 AR |
133 | void ext4_block_bitmap_set(struct super_block *sb, |
134 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 135 | { |
3a14589c | 136 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
137 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
138 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
139 | } |
140 | ||
8fadc143 AR |
141 | void ext4_inode_bitmap_set(struct super_block *sb, |
142 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 143 | { |
5272f837 | 144 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
145 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
146 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
147 | } |
148 | ||
8fadc143 AR |
149 | void ext4_inode_table_set(struct super_block *sb, |
150 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 151 | { |
5272f837 | 152 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
153 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
154 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
155 | } |
156 | ||
560671a0 AK |
157 | void ext4_free_blks_set(struct super_block *sb, |
158 | struct ext4_group_desc *bg, __u32 count) | |
159 | { | |
160 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
161 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
162 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
163 | } | |
164 | ||
165 | void ext4_free_inodes_set(struct super_block *sb, | |
166 | struct ext4_group_desc *bg, __u32 count) | |
167 | { | |
168 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
169 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
170 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
171 | } | |
172 | ||
173 | void ext4_used_dirs_set(struct super_block *sb, | |
174 | struct ext4_group_desc *bg, __u32 count) | |
175 | { | |
176 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
177 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
178 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
179 | } | |
180 | ||
181 | void ext4_itable_unused_set(struct super_block *sb, | |
182 | struct ext4_group_desc *bg, __u32 count) | |
183 | { | |
184 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
185 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
186 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
187 | } | |
188 | ||
ac27a0ec | 189 | /* |
dab291af | 190 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
191 | * |
192 | * The only special thing we need to do here is to make sure that all | |
193 | * journal_end calls result in the superblock being marked dirty, so | |
194 | * that sync() will call the filesystem's write_super callback if | |
195 | * appropriate. | |
196 | */ | |
617ba13b | 197 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
198 | { |
199 | journal_t *journal; | |
200 | ||
201 | if (sb->s_flags & MS_RDONLY) | |
202 | return ERR_PTR(-EROFS); | |
203 | ||
204 | /* Special case here: if the journal has aborted behind our | |
205 | * backs (eg. EIO in the commit thread), then we still need to | |
206 | * take the FS itself readonly cleanly. */ | |
617ba13b | 207 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
208 | if (journal) { |
209 | if (is_journal_aborted(journal)) { | |
0b8e58a1 | 210 | ext4_abort(sb, __func__, "Detected aborted journal"); |
0390131b FM |
211 | return ERR_PTR(-EROFS); |
212 | } | |
213 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 214 | } |
0390131b FM |
215 | /* |
216 | * We're not journaling, return the appropriate indication. | |
217 | */ | |
218 | current->journal_info = EXT4_NOJOURNAL_HANDLE; | |
219 | return current->journal_info; | |
ac27a0ec DK |
220 | } |
221 | ||
222 | /* | |
223 | * The only special thing we need to do here is to make sure that all | |
dab291af | 224 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
225 | * that sync() will call the filesystem's write_super callback if |
226 | * appropriate. | |
227 | */ | |
617ba13b | 228 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
229 | { |
230 | struct super_block *sb; | |
231 | int err; | |
232 | int rc; | |
233 | ||
0390131b FM |
234 | if (!ext4_handle_valid(handle)) { |
235 | /* | |
236 | * Do this here since we don't call jbd2_journal_stop() in | |
237 | * no-journal mode. | |
238 | */ | |
239 | current->journal_info = NULL; | |
240 | return 0; | |
241 | } | |
ac27a0ec DK |
242 | sb = handle->h_transaction->t_journal->j_private; |
243 | err = handle->h_err; | |
dab291af | 244 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
245 | |
246 | if (!err) | |
247 | err = rc; | |
248 | if (err) | |
617ba13b | 249 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
250 | return err; |
251 | } | |
252 | ||
617ba13b | 253 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
254 | struct buffer_head *bh, handle_t *handle, int err) |
255 | { | |
256 | char nbuf[16]; | |
617ba13b | 257 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 258 | |
0390131b FM |
259 | BUG_ON(!ext4_handle_valid(handle)); |
260 | ||
ac27a0ec DK |
261 | if (bh) |
262 | BUFFER_TRACE(bh, "abort"); | |
263 | ||
264 | if (!handle->h_err) | |
265 | handle->h_err = err; | |
266 | ||
267 | if (is_handle_aborted(handle)) | |
268 | return; | |
269 | ||
270 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
271 | caller, errstr, err_fn); | |
272 | ||
dab291af | 273 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
274 | } |
275 | ||
276 | /* Deal with the reporting of failure conditions on a filesystem such as | |
277 | * inconsistencies detected or read IO failures. | |
278 | * | |
279 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 280 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
281 | * write ordering constraints on the superblock which prevent us from |
282 | * writing it out straight away; and given that the journal is about to | |
283 | * be aborted, we can't rely on the current, or future, transactions to | |
284 | * write out the superblock safely. | |
285 | * | |
dab291af | 286 | * We'll just use the jbd2_journal_abort() error code to record an error in |
ac27a0ec DK |
287 | * the journal instead. On recovery, the journal will compain about |
288 | * that error until we've noted it down and cleared it. | |
289 | */ | |
290 | ||
617ba13b | 291 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 292 | { |
617ba13b | 293 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 294 | |
617ba13b MC |
295 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
296 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
297 | |
298 | if (sb->s_flags & MS_RDONLY) | |
299 | return; | |
300 | ||
2b2d6d01 | 301 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 302 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 303 | |
617ba13b | 304 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ac27a0ec | 305 | if (journal) |
dab291af | 306 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 307 | } |
2b2d6d01 TT |
308 | if (test_opt(sb, ERRORS_RO)) { |
309 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
ac27a0ec DK |
310 | sb->s_flags |= MS_RDONLY; |
311 | } | |
e2d67052 | 312 | ext4_commit_super(sb, 1); |
ac27a0ec | 313 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 314 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
315 | sb->s_id); |
316 | } | |
317 | ||
2b2d6d01 TT |
318 | void ext4_error(struct super_block *sb, const char *function, |
319 | const char *fmt, ...) | |
ac27a0ec DK |
320 | { |
321 | va_list args; | |
322 | ||
323 | va_start(args, fmt); | |
2b2d6d01 | 324 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
325 | vprintk(fmt, args); |
326 | printk("\n"); | |
327 | va_end(args); | |
328 | ||
617ba13b | 329 | ext4_handle_error(sb); |
ac27a0ec DK |
330 | } |
331 | ||
2b2d6d01 | 332 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
333 | char nbuf[16]) |
334 | { | |
335 | char *errstr = NULL; | |
336 | ||
337 | switch (errno) { | |
338 | case -EIO: | |
339 | errstr = "IO failure"; | |
340 | break; | |
341 | case -ENOMEM: | |
342 | errstr = "Out of memory"; | |
343 | break; | |
344 | case -EROFS: | |
dab291af | 345 | if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) |
ac27a0ec DK |
346 | errstr = "Journal has aborted"; |
347 | else | |
348 | errstr = "Readonly filesystem"; | |
349 | break; | |
350 | default: | |
351 | /* If the caller passed in an extra buffer for unknown | |
352 | * errors, textualise them now. Else we just return | |
353 | * NULL. */ | |
354 | if (nbuf) { | |
355 | /* Check for truncated error codes... */ | |
356 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
357 | errstr = nbuf; | |
358 | } | |
359 | break; | |
360 | } | |
361 | ||
362 | return errstr; | |
363 | } | |
364 | ||
617ba13b | 365 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
366 | * automatically and invokes the appropriate error response. */ |
367 | ||
2b2d6d01 | 368 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
369 | { |
370 | char nbuf[16]; | |
371 | const char *errstr; | |
372 | ||
373 | /* Special case: if the error is EROFS, and we're not already | |
374 | * inside a transaction, then there's really no point in logging | |
375 | * an error. */ | |
376 | if (errno == -EROFS && journal_current_handle() == NULL && | |
377 | (sb->s_flags & MS_RDONLY)) | |
378 | return; | |
379 | ||
617ba13b | 380 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
381 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
382 | sb->s_id, function, errstr); | |
ac27a0ec | 383 | |
617ba13b | 384 | ext4_handle_error(sb); |
ac27a0ec DK |
385 | } |
386 | ||
387 | /* | |
617ba13b | 388 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
389 | * abort function may be used to deal with unrecoverable failures such |
390 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
391 | * | |
392 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
393 | * unless the error response on the fs has been set to panic in which | |
394 | * case we take the easy way out and panic immediately. | |
395 | */ | |
396 | ||
2b2d6d01 TT |
397 | void ext4_abort(struct super_block *sb, const char *function, |
398 | const char *fmt, ...) | |
ac27a0ec DK |
399 | { |
400 | va_list args; | |
401 | ||
2b2d6d01 | 402 | printk(KERN_CRIT "ext4_abort called.\n"); |
ac27a0ec DK |
403 | |
404 | va_start(args, fmt); | |
2b2d6d01 | 405 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
406 | vprintk(fmt, args); |
407 | printk("\n"); | |
408 | va_end(args); | |
409 | ||
410 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 411 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
412 | |
413 | if (sb->s_flags & MS_RDONLY) | |
414 | return; | |
415 | ||
416 | printk(KERN_CRIT "Remounting filesystem read-only\n"); | |
617ba13b | 417 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 418 | sb->s_flags |= MS_RDONLY; |
617ba13b | 419 | EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; |
ef2cabf7 HK |
420 | if (EXT4_SB(sb)->s_journal) |
421 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
422 | } |
423 | ||
2b2d6d01 TT |
424 | void ext4_warning(struct super_block *sb, const char *function, |
425 | const char *fmt, ...) | |
ac27a0ec DK |
426 | { |
427 | va_list args; | |
428 | ||
429 | va_start(args, fmt); | |
617ba13b | 430 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
431 | sb->s_id, function); |
432 | vprintk(fmt, args); | |
433 | printk("\n"); | |
434 | va_end(args); | |
435 | } | |
436 | ||
5d1b1b3f | 437 | void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, |
0b8e58a1 | 438 | const char *function, const char *fmt, ...) |
5d1b1b3f AK |
439 | __releases(bitlock) |
440 | __acquires(bitlock) | |
441 | { | |
442 | va_list args; | |
443 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
444 | ||
445 | va_start(args, fmt); | |
446 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); | |
447 | vprintk(fmt, args); | |
448 | printk("\n"); | |
449 | va_end(args); | |
450 | ||
451 | if (test_opt(sb, ERRORS_CONT)) { | |
452 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
453 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 454 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
455 | return; |
456 | } | |
457 | ext4_unlock_group(sb, grp); | |
458 | ext4_handle_error(sb); | |
459 | /* | |
460 | * We only get here in the ERRORS_RO case; relocking the group | |
461 | * may be dangerous, but nothing bad will happen since the | |
462 | * filesystem will have already been marked read/only and the | |
463 | * journal has been aborted. We return 1 as a hint to callers | |
464 | * who might what to use the return value from | |
465 | * ext4_grp_locked_error() to distinguish beween the | |
466 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
467 | * aggressively from the ext4 function in question, with a | |
468 | * more appropriate error code. | |
469 | */ | |
470 | ext4_lock_group(sb, grp); | |
471 | return; | |
472 | } | |
473 | ||
617ba13b | 474 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 475 | { |
617ba13b | 476 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 477 | |
617ba13b | 478 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
479 | return; |
480 | ||
46e665e9 | 481 | ext4_warning(sb, __func__, |
ac27a0ec DK |
482 | "updating to rev %d because of new feature flag, " |
483 | "running e2fsck is recommended", | |
617ba13b | 484 | EXT4_DYNAMIC_REV); |
ac27a0ec | 485 | |
617ba13b MC |
486 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
487 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
488 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
489 | /* leave es->s_feature_*compat flags alone */ |
490 | /* es->s_uuid will be set by e2fsck if empty */ | |
491 | ||
492 | /* | |
493 | * The rest of the superblock fields should be zero, and if not it | |
494 | * means they are likely already in use, so leave them alone. We | |
495 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
496 | */ | |
497 | } | |
498 | ||
499 | /* | |
500 | * Open the external journal device | |
501 | */ | |
617ba13b | 502 | static struct block_device *ext4_blkdev_get(dev_t dev) |
ac27a0ec DK |
503 | { |
504 | struct block_device *bdev; | |
505 | char b[BDEVNAME_SIZE]; | |
506 | ||
507 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
508 | if (IS_ERR(bdev)) | |
509 | goto fail; | |
510 | return bdev; | |
511 | ||
512 | fail: | |
abda1418 | 513 | printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", |
ac27a0ec DK |
514 | __bdevname(dev, b), PTR_ERR(bdev)); |
515 | return NULL; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Release the journal device | |
520 | */ | |
617ba13b | 521 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
522 | { |
523 | bd_release(bdev); | |
9a1c3542 | 524 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
525 | } |
526 | ||
617ba13b | 527 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
528 | { |
529 | struct block_device *bdev; | |
530 | int ret = -ENODEV; | |
531 | ||
532 | bdev = sbi->journal_bdev; | |
533 | if (bdev) { | |
617ba13b | 534 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
535 | sbi->journal_bdev = NULL; |
536 | } | |
537 | return ret; | |
538 | } | |
539 | ||
540 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
541 | { | |
617ba13b | 542 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
543 | } |
544 | ||
617ba13b | 545 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
546 | { |
547 | struct list_head *l; | |
548 | ||
549 | printk(KERN_ERR "sb orphan head is %d\n", | |
550 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
551 | ||
552 | printk(KERN_ERR "sb_info orphan list:\n"); | |
553 | list_for_each(l, &sbi->s_orphan) { | |
554 | struct inode *inode = orphan_list_entry(l); | |
555 | printk(KERN_ERR " " | |
556 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
557 | inode->i_sb->s_id, inode->i_ino, inode, | |
558 | inode->i_mode, inode->i_nlink, | |
559 | NEXT_ORPHAN(inode)); | |
560 | } | |
561 | } | |
562 | ||
2b2d6d01 | 563 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 564 | { |
617ba13b MC |
565 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
566 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 567 | int i, err; |
ac27a0ec | 568 | |
6fd058f7 | 569 | ext4_release_system_zone(sb); |
c9de560d | 570 | ext4_mb_release(sb); |
a86c6181 | 571 | ext4_ext_release(sb); |
617ba13b | 572 | ext4_xattr_put_super(sb); |
0390131b FM |
573 | if (sbi->s_journal) { |
574 | err = jbd2_journal_destroy(sbi->s_journal); | |
575 | sbi->s_journal = NULL; | |
576 | if (err < 0) | |
577 | ext4_abort(sb, __func__, | |
578 | "Couldn't clean up the journal"); | |
579 | } | |
ac27a0ec | 580 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 581 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 582 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 583 | ext4_commit_super(sb, 1); |
ac27a0ec | 584 | } |
240799cd | 585 | if (sbi->s_proc) { |
9f6200bb | 586 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 587 | } |
3197ebdb | 588 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
589 | |
590 | for (i = 0; i < sbi->s_gdb_count; i++) | |
591 | brelse(sbi->s_group_desc[i]); | |
592 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
593 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
594 | vfree(sbi->s_flex_groups); | |
595 | else | |
596 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
597 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
598 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
599 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 600 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
601 | brelse(sbi->s_sbh); |
602 | #ifdef CONFIG_QUOTA | |
603 | for (i = 0; i < MAXQUOTAS; i++) | |
604 | kfree(sbi->s_qf_names[i]); | |
605 | #endif | |
606 | ||
607 | /* Debugging code just in case the in-memory inode orphan list | |
608 | * isn't empty. The on-disk one can be non-empty if we've | |
609 | * detected an error and taken the fs readonly, but the | |
610 | * in-memory list had better be clean by this point. */ | |
611 | if (!list_empty(&sbi->s_orphan)) | |
612 | dump_orphan_list(sb, sbi); | |
613 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
614 | ||
f98393a6 | 615 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
616 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
617 | /* | |
618 | * Invalidate the journal device's buffers. We don't want them | |
619 | * floating about in memory - the physical journal device may | |
620 | * hotswapped, and it breaks the `ro-after' testing code. | |
621 | */ | |
622 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 623 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 624 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
625 | } |
626 | sb->s_fs_info = NULL; | |
3197ebdb TT |
627 | /* |
628 | * Now that we are completely done shutting down the | |
629 | * superblock, we need to actually destroy the kobject. | |
630 | */ | |
631 | unlock_kernel(); | |
632 | unlock_super(sb); | |
633 | kobject_put(&sbi->s_kobj); | |
634 | wait_for_completion(&sbi->s_kobj_unregister); | |
635 | lock_super(sb); | |
636 | lock_kernel(); | |
705895b6 | 637 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 638 | kfree(sbi); |
ac27a0ec DK |
639 | } |
640 | ||
e18b890b | 641 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
642 | |
643 | /* | |
644 | * Called inside transaction, so use GFP_NOFS | |
645 | */ | |
617ba13b | 646 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 647 | { |
617ba13b | 648 | struct ext4_inode_info *ei; |
ac27a0ec | 649 | |
e6b4f8da | 650 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
651 | if (!ei) |
652 | return NULL; | |
0b8e58a1 | 653 | |
03010a33 | 654 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
655 | ei->i_acl = EXT4_ACL_NOT_CACHED; |
656 | ei->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec | 657 | #endif |
ac27a0ec | 658 | ei->vfs_inode.i_version = 1; |
91246c00 | 659 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 660 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
661 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
662 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
663 | /* |
664 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
665 | * therefore it can be null here. Don't check it, just initialize | |
666 | * jinode. | |
667 | */ | |
678aaf48 | 668 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
669 | ei->i_reserved_data_blocks = 0; |
670 | ei->i_reserved_meta_blocks = 0; | |
671 | ei->i_allocated_meta_blocks = 0; | |
672 | ei->i_delalloc_reserved_flag = 0; | |
673 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
0b8e58a1 | 674 | |
ac27a0ec DK |
675 | return &ei->vfs_inode; |
676 | } | |
677 | ||
617ba13b | 678 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 679 | { |
9f7dd93d VA |
680 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
681 | printk("EXT4 Inode %p: orphan list check failed!\n", | |
682 | EXT4_I(inode)); | |
683 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, | |
684 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
685 | true); | |
686 | dump_stack(); | |
687 | } | |
617ba13b | 688 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
689 | } |
690 | ||
51cc5068 | 691 | static void init_once(void *foo) |
ac27a0ec | 692 | { |
617ba13b | 693 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 694 | |
a35afb83 | 695 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 696 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 697 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 698 | #endif |
0e855ac8 | 699 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 700 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
701 | } |
702 | ||
703 | static int init_inodecache(void) | |
704 | { | |
617ba13b MC |
705 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
706 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
707 | 0, (SLAB_RECLAIM_ACCOUNT| |
708 | SLAB_MEM_SPREAD), | |
20c2df83 | 709 | init_once); |
617ba13b | 710 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
711 | return -ENOMEM; |
712 | return 0; | |
713 | } | |
714 | ||
715 | static void destroy_inodecache(void) | |
716 | { | |
617ba13b | 717 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
718 | } |
719 | ||
617ba13b | 720 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 721 | { |
03010a33 | 722 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b MC |
723 | if (EXT4_I(inode)->i_acl && |
724 | EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { | |
725 | posix_acl_release(EXT4_I(inode)->i_acl); | |
726 | EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; | |
727 | } | |
728 | if (EXT4_I(inode)->i_default_acl && | |
729 | EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { | |
730 | posix_acl_release(EXT4_I(inode)->i_default_acl); | |
731 | EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; | |
ac27a0ec DK |
732 | } |
733 | #endif | |
c2ea3fde | 734 | ext4_discard_preallocations(inode); |
0390131b FM |
735 | if (EXT4_JOURNAL(inode)) |
736 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 737 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
738 | } |
739 | ||
2b2d6d01 TT |
740 | static inline void ext4_show_quota_options(struct seq_file *seq, |
741 | struct super_block *sb) | |
ac27a0ec DK |
742 | { |
743 | #if defined(CONFIG_QUOTA) | |
617ba13b | 744 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
745 | |
746 | if (sbi->s_jquota_fmt) | |
747 | seq_printf(seq, ",jqfmt=%s", | |
af5bc92d | 748 | (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); |
ac27a0ec DK |
749 | |
750 | if (sbi->s_qf_names[USRQUOTA]) | |
751 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
752 | ||
753 | if (sbi->s_qf_names[GRPQUOTA]) | |
754 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
755 | ||
617ba13b | 756 | if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) |
ac27a0ec DK |
757 | seq_puts(seq, ",usrquota"); |
758 | ||
617ba13b | 759 | if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) |
ac27a0ec DK |
760 | seq_puts(seq, ",grpquota"); |
761 | #endif | |
762 | } | |
763 | ||
d9c9bef1 MS |
764 | /* |
765 | * Show an option if | |
766 | * - it's set to a non-default value OR | |
767 | * - if the per-sb default is different from the global default | |
768 | */ | |
617ba13b | 769 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 770 | { |
aa22df2c AK |
771 | int def_errors; |
772 | unsigned long def_mount_opts; | |
ac27a0ec | 773 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
774 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
775 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
776 | |
777 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 778 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
779 | |
780 | if (sbi->s_sb_block != 1) | |
781 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
782 | if (test_opt(sb, MINIX_DF)) | |
783 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 784 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
785 | seq_puts(seq, ",grpid"); |
786 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
787 | seq_puts(seq, ",nogrpid"); | |
788 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
789 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
790 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
791 | } | |
792 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
793 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
794 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
795 | } | |
bb4f397a | 796 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 797 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
798 | def_errors == EXT4_ERRORS_CONTINUE) { |
799 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
800 | } |
801 | } | |
aa22df2c | 802 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 803 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 804 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 805 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 806 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 807 | seq_puts(seq, ",nouid32"); |
aa22df2c | 808 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
809 | seq_puts(seq, ",debug"); |
810 | if (test_opt(sb, OLDALLOC)) | |
811 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 812 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
813 | if (test_opt(sb, XATTR_USER) && |
814 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
815 | seq_puts(seq, ",user_xattr"); |
816 | if (!test_opt(sb, XATTR_USER) && | |
817 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
818 | seq_puts(seq, ",nouser_xattr"); | |
819 | } | |
820 | #endif | |
03010a33 | 821 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 822 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
823 | seq_puts(seq, ",acl"); |
824 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
825 | seq_puts(seq, ",noacl"); | |
826 | #endif | |
30773840 | 827 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
828 | seq_printf(seq, ",commit=%u", |
829 | (unsigned) (sbi->s_commit_interval / HZ)); | |
830 | } | |
30773840 TT |
831 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
832 | seq_printf(seq, ",min_batch_time=%u", | |
833 | (unsigned) sbi->s_min_batch_time); | |
834 | } | |
835 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
836 | seq_printf(seq, ",max_batch_time=%u", | |
837 | (unsigned) sbi->s_min_batch_time); | |
838 | } | |
839 | ||
571640ca ES |
840 | /* |
841 | * We're changing the default of barrier mount option, so | |
842 | * let's always display its mount state so it's clear what its | |
843 | * status is. | |
844 | */ | |
845 | seq_puts(seq, ",barrier="); | |
846 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
847 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
848 | seq_puts(seq, ",journal_async_commit"); | |
d9c9bef1 MS |
849 | if (test_opt(sb, NOBH)) |
850 | seq_puts(seq, ",nobh"); | |
25ec56b5 JNC |
851 | if (test_opt(sb, I_VERSION)) |
852 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
853 | if (!test_opt(sb, DELALLOC)) |
854 | seq_puts(seq, ",nodelalloc"); | |
855 | ||
ac27a0ec | 856 | |
cb45bbe4 MS |
857 | if (sbi->s_stripe) |
858 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
859 | /* |
860 | * journal mode get enabled in different ways | |
861 | * So just print the value even if we didn't specify it | |
862 | */ | |
617ba13b | 863 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 864 | seq_puts(seq, ",data=journal"); |
617ba13b | 865 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 866 | seq_puts(seq, ",data=ordered"); |
617ba13b | 867 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
868 | seq_puts(seq, ",data=writeback"); |
869 | ||
240799cd TT |
870 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
871 | seq_printf(seq, ",inode_readahead_blks=%u", | |
872 | sbi->s_inode_readahead_blks); | |
873 | ||
5bf5683a HK |
874 | if (test_opt(sb, DATA_ERR_ABORT)) |
875 | seq_puts(seq, ",data_err=abort"); | |
876 | ||
afd4672d | 877 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 878 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 879 | |
617ba13b | 880 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 881 | |
ac27a0ec DK |
882 | return 0; |
883 | } | |
884 | ||
1b961ac0 | 885 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 886 | u64 ino, u32 generation) |
ac27a0ec | 887 | { |
ac27a0ec | 888 | struct inode *inode; |
ac27a0ec | 889 | |
617ba13b | 890 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 891 | return ERR_PTR(-ESTALE); |
617ba13b | 892 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
893 | return ERR_PTR(-ESTALE); |
894 | ||
895 | /* iget isn't really right if the inode is currently unallocated!! | |
896 | * | |
617ba13b | 897 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
898 | * deleted, so we should be safe. |
899 | * | |
900 | * Currently we don't know the generation for parent directory, so | |
901 | * a generation of 0 means "accept any" | |
902 | */ | |
1d1fe1ee DH |
903 | inode = ext4_iget(sb, ino); |
904 | if (IS_ERR(inode)) | |
905 | return ERR_CAST(inode); | |
906 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
907 | iput(inode); |
908 | return ERR_PTR(-ESTALE); | |
909 | } | |
1b961ac0 CH |
910 | |
911 | return inode; | |
912 | } | |
913 | ||
914 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 915 | int fh_len, int fh_type) |
1b961ac0 CH |
916 | { |
917 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
918 | ext4_nfs_get_inode); | |
919 | } | |
920 | ||
921 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 922 | int fh_len, int fh_type) |
1b961ac0 CH |
923 | { |
924 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
925 | ext4_nfs_get_inode); | |
ac27a0ec DK |
926 | } |
927 | ||
c39a7f84 TO |
928 | /* |
929 | * Try to release metadata pages (indirect blocks, directories) which are | |
930 | * mapped via the block device. Since these pages could have journal heads | |
931 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
932 | * jbd2 layer's try_to_free_buffers() function to release them. | |
933 | */ | |
0b8e58a1 AD |
934 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
935 | gfp_t wait) | |
c39a7f84 TO |
936 | { |
937 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
938 | ||
939 | WARN_ON(PageChecked(page)); | |
940 | if (!page_has_buffers(page)) | |
941 | return 0; | |
942 | if (journal) | |
943 | return jbd2_journal_try_to_free_buffers(journal, page, | |
944 | wait & ~__GFP_WAIT); | |
945 | return try_to_free_buffers(page); | |
946 | } | |
947 | ||
ac27a0ec | 948 | #ifdef CONFIG_QUOTA |
af5bc92d | 949 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 950 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 951 | |
617ba13b MC |
952 | static int ext4_write_dquot(struct dquot *dquot); |
953 | static int ext4_acquire_dquot(struct dquot *dquot); | |
954 | static int ext4_release_dquot(struct dquot *dquot); | |
955 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
956 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 JK |
957 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
958 | char *path, int remount); | |
617ba13b MC |
959 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
960 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 961 | size_t len, loff_t off); |
617ba13b | 962 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
963 | const char *data, size_t len, loff_t off); |
964 | ||
617ba13b | 965 | static struct dquot_operations ext4_quota_operations = { |
edf72453 JK |
966 | .initialize = dquot_initialize, |
967 | .drop = dquot_drop, | |
ac27a0ec | 968 | .alloc_space = dquot_alloc_space, |
60e58e0f MC |
969 | .reserve_space = dquot_reserve_space, |
970 | .claim_space = dquot_claim_space, | |
971 | .release_rsv = dquot_release_reserved_space, | |
972 | .get_reserved_space = ext4_get_reserved_space, | |
ac27a0ec DK |
973 | .alloc_inode = dquot_alloc_inode, |
974 | .free_space = dquot_free_space, | |
975 | .free_inode = dquot_free_inode, | |
976 | .transfer = dquot_transfer, | |
617ba13b MC |
977 | .write_dquot = ext4_write_dquot, |
978 | .acquire_dquot = ext4_acquire_dquot, | |
979 | .release_dquot = ext4_release_dquot, | |
980 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
981 | .write_info = ext4_write_info, |
982 | .alloc_dquot = dquot_alloc, | |
983 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
984 | }; |
985 | ||
617ba13b MC |
986 | static struct quotactl_ops ext4_qctl_operations = { |
987 | .quota_on = ext4_quota_on, | |
ac27a0ec DK |
988 | .quota_off = vfs_quota_off, |
989 | .quota_sync = vfs_quota_sync, | |
990 | .get_info = vfs_get_dqinfo, | |
991 | .set_info = vfs_set_dqinfo, | |
992 | .get_dqblk = vfs_get_dqblk, | |
993 | .set_dqblk = vfs_set_dqblk | |
994 | }; | |
995 | #endif | |
996 | ||
ee9b6d61 | 997 | static const struct super_operations ext4_sops = { |
617ba13b MC |
998 | .alloc_inode = ext4_alloc_inode, |
999 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1000 | .write_inode = ext4_write_inode, |
1001 | .dirty_inode = ext4_dirty_inode, | |
1002 | .delete_inode = ext4_delete_inode, | |
1003 | .put_super = ext4_put_super, | |
617ba13b | 1004 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1005 | .freeze_fs = ext4_freeze, |
1006 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1007 | .statfs = ext4_statfs, |
1008 | .remount_fs = ext4_remount, | |
1009 | .clear_inode = ext4_clear_inode, | |
1010 | .show_options = ext4_show_options, | |
ac27a0ec | 1011 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1012 | .quota_read = ext4_quota_read, |
1013 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1014 | #endif |
c39a7f84 | 1015 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1016 | }; |
1017 | ||
9ca92389 TT |
1018 | static const struct super_operations ext4_nojournal_sops = { |
1019 | .alloc_inode = ext4_alloc_inode, | |
1020 | .destroy_inode = ext4_destroy_inode, | |
1021 | .write_inode = ext4_write_inode, | |
1022 | .dirty_inode = ext4_dirty_inode, | |
1023 | .delete_inode = ext4_delete_inode, | |
1024 | .write_super = ext4_write_super, | |
1025 | .put_super = ext4_put_super, | |
1026 | .statfs = ext4_statfs, | |
1027 | .remount_fs = ext4_remount, | |
1028 | .clear_inode = ext4_clear_inode, | |
1029 | .show_options = ext4_show_options, | |
1030 | #ifdef CONFIG_QUOTA | |
1031 | .quota_read = ext4_quota_read, | |
1032 | .quota_write = ext4_quota_write, | |
1033 | #endif | |
1034 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1035 | }; | |
1036 | ||
39655164 | 1037 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1038 | .fh_to_dentry = ext4_fh_to_dentry, |
1039 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1040 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1041 | }; |
1042 | ||
1043 | enum { | |
1044 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1045 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1046 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1047 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1048 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1049 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1050 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1051 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1052 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
f4033903 | 1053 | Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, |
ac27a0ec DK |
1054 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
1055 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, | |
06705bff TT |
1056 | Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, |
1057 | Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1058 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1059 | Opt_block_validity, Opt_noblock_validity, |
b3881f74 | 1060 | Opt_inode_readahead_blks, Opt_journal_ioprio |
ac27a0ec DK |
1061 | }; |
1062 | ||
a447c093 | 1063 | static const match_table_t tokens = { |
ac27a0ec DK |
1064 | {Opt_bsd_df, "bsddf"}, |
1065 | {Opt_minix_df, "minixdf"}, | |
1066 | {Opt_grpid, "grpid"}, | |
1067 | {Opt_grpid, "bsdgroups"}, | |
1068 | {Opt_nogrpid, "nogrpid"}, | |
1069 | {Opt_nogrpid, "sysvgroups"}, | |
1070 | {Opt_resgid, "resgid=%u"}, | |
1071 | {Opt_resuid, "resuid=%u"}, | |
1072 | {Opt_sb, "sb=%u"}, | |
1073 | {Opt_err_cont, "errors=continue"}, | |
1074 | {Opt_err_panic, "errors=panic"}, | |
1075 | {Opt_err_ro, "errors=remount-ro"}, | |
1076 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1077 | {Opt_debug, "debug"}, |
1078 | {Opt_oldalloc, "oldalloc"}, | |
1079 | {Opt_orlov, "orlov"}, | |
1080 | {Opt_user_xattr, "user_xattr"}, | |
1081 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1082 | {Opt_acl, "acl"}, | |
1083 | {Opt_noacl, "noacl"}, | |
ac27a0ec DK |
1084 | {Opt_noload, "noload"}, |
1085 | {Opt_nobh, "nobh"}, | |
1086 | {Opt_bh, "bh"}, | |
1087 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1088 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1089 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1090 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1091 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1092 | {Opt_journal_checksum, "journal_checksum"}, |
1093 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1094 | {Opt_abort, "abort"}, |
1095 | {Opt_data_journal, "data=journal"}, | |
1096 | {Opt_data_ordered, "data=ordered"}, | |
1097 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1098 | {Opt_data_err_abort, "data_err=abort"}, |
1099 | {Opt_data_err_ignore, "data_err=ignore"}, | |
f4033903 | 1100 | {Opt_mb_history_length, "mb_history_length=%u"}, |
ac27a0ec DK |
1101 | {Opt_offusrjquota, "usrjquota="}, |
1102 | {Opt_usrjquota, "usrjquota=%s"}, | |
1103 | {Opt_offgrpjquota, "grpjquota="}, | |
1104 | {Opt_grpjquota, "grpjquota=%s"}, | |
1105 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1106 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
1107 | {Opt_grpquota, "grpquota"}, | |
1108 | {Opt_noquota, "noquota"}, | |
1109 | {Opt_quota, "quota"}, | |
1110 | {Opt_usrquota, "usrquota"}, | |
1111 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1112 | {Opt_barrier, "barrier"}, |
1113 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1114 | {Opt_i_version, "i_version"}, |
c9de560d | 1115 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1116 | {Opt_resize, "resize"}, |
64769240 | 1117 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1118 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1119 | {Opt_block_validity, "block_validity"}, |
1120 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1121 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1122 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1123 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1124 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1125 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
f3f12faa | 1126 | {Opt_err, NULL}, |
ac27a0ec DK |
1127 | }; |
1128 | ||
617ba13b | 1129 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1130 | { |
617ba13b | 1131 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1132 | char *options = (char *) *data; |
1133 | ||
1134 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1135 | return 1; /* Default location */ | |
0b8e58a1 | 1136 | |
ac27a0ec | 1137 | options += 3; |
0b8e58a1 | 1138 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1139 | sb_block = simple_strtoul(options, &options, 0); |
1140 | if (*options && *options != ',') { | |
4776004f | 1141 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1142 | (char *) *data); |
1143 | return 1; | |
1144 | } | |
1145 | if (*options == ',') | |
1146 | options++; | |
1147 | *data = (void *) options; | |
0b8e58a1 | 1148 | |
ac27a0ec DK |
1149 | return sb_block; |
1150 | } | |
1151 | ||
b3881f74 TT |
1152 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
1153 | ||
2b2d6d01 | 1154 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1155 | unsigned long *journal_devnum, |
b3881f74 | 1156 | unsigned int *journal_ioprio, |
2b2d6d01 | 1157 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1158 | { |
617ba13b | 1159 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1160 | char *p; |
ac27a0ec DK |
1161 | substring_t args[MAX_OPT_ARGS]; |
1162 | int data_opt = 0; | |
1163 | int option; | |
1164 | #ifdef CONFIG_QUOTA | |
dfc5d03f | 1165 | int qtype, qfmt; |
ac27a0ec DK |
1166 | char *qname; |
1167 | #endif | |
1168 | ||
1169 | if (!options) | |
1170 | return 1; | |
1171 | ||
2b2d6d01 | 1172 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1173 | int token; |
1174 | if (!*p) | |
1175 | continue; | |
1176 | ||
1177 | token = match_token(p, tokens, args); | |
1178 | switch (token) { | |
1179 | case Opt_bsd_df: | |
2b2d6d01 | 1180 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1181 | break; |
1182 | case Opt_minix_df: | |
2b2d6d01 | 1183 | set_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1184 | break; |
1185 | case Opt_grpid: | |
2b2d6d01 | 1186 | set_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1187 | break; |
1188 | case Opt_nogrpid: | |
2b2d6d01 | 1189 | clear_opt(sbi->s_mount_opt, GRPID); |
ac27a0ec DK |
1190 | break; |
1191 | case Opt_resuid: | |
1192 | if (match_int(&args[0], &option)) | |
1193 | return 0; | |
1194 | sbi->s_resuid = option; | |
1195 | break; | |
1196 | case Opt_resgid: | |
1197 | if (match_int(&args[0], &option)) | |
1198 | return 0; | |
1199 | sbi->s_resgid = option; | |
1200 | break; | |
1201 | case Opt_sb: | |
1202 | /* handled by get_sb_block() instead of here */ | |
1203 | /* *sb_block = match_int(&args[0]); */ | |
1204 | break; | |
1205 | case Opt_err_panic: | |
2b2d6d01 TT |
1206 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1207 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1208 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1209 | break; |
1210 | case Opt_err_ro: | |
2b2d6d01 TT |
1211 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1212 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1213 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1214 | break; |
1215 | case Opt_err_cont: | |
2b2d6d01 TT |
1216 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1217 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1218 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1219 | break; |
1220 | case Opt_nouid32: | |
2b2d6d01 | 1221 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1222 | break; |
ac27a0ec | 1223 | case Opt_debug: |
2b2d6d01 | 1224 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1225 | break; |
1226 | case Opt_oldalloc: | |
2b2d6d01 | 1227 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1228 | break; |
1229 | case Opt_orlov: | |
2b2d6d01 | 1230 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1231 | break; |
03010a33 | 1232 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1233 | case Opt_user_xattr: |
2b2d6d01 | 1234 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1235 | break; |
1236 | case Opt_nouser_xattr: | |
2b2d6d01 | 1237 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1238 | break; |
1239 | #else | |
1240 | case Opt_user_xattr: | |
1241 | case Opt_nouser_xattr: | |
4776004f TT |
1242 | printk(KERN_ERR "EXT4 (no)user_xattr options " |
1243 | "not supported\n"); | |
ac27a0ec DK |
1244 | break; |
1245 | #endif | |
03010a33 | 1246 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1247 | case Opt_acl: |
1248 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1249 | break; | |
1250 | case Opt_noacl: | |
1251 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1252 | break; | |
1253 | #else | |
1254 | case Opt_acl: | |
1255 | case Opt_noacl: | |
4776004f TT |
1256 | printk(KERN_ERR "EXT4 (no)acl options " |
1257 | "not supported\n"); | |
ac27a0ec DK |
1258 | break; |
1259 | #endif | |
ac27a0ec DK |
1260 | case Opt_journal_update: |
1261 | /* @@@ FIXME */ | |
1262 | /* Eventually we will want to be able to create | |
1263 | a journal file here. For now, only allow the | |
1264 | user to specify an existing inode to be the | |
1265 | journal file. */ | |
1266 | if (is_remount) { | |
617ba13b | 1267 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1268 | "journal on remount\n"); |
1269 | return 0; | |
1270 | } | |
2b2d6d01 | 1271 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1272 | break; |
ac27a0ec DK |
1273 | case Opt_journal_dev: |
1274 | if (is_remount) { | |
617ba13b | 1275 | printk(KERN_ERR "EXT4-fs: cannot specify " |
ac27a0ec DK |
1276 | "journal on remount\n"); |
1277 | return 0; | |
1278 | } | |
1279 | if (match_int(&args[0], &option)) | |
1280 | return 0; | |
1281 | *journal_devnum = option; | |
1282 | break; | |
818d276c GS |
1283 | case Opt_journal_checksum: |
1284 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1285 | break; | |
1286 | case Opt_journal_async_commit: | |
1287 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
1288 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); | |
1289 | break; | |
ac27a0ec | 1290 | case Opt_noload: |
2b2d6d01 | 1291 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1292 | break; |
1293 | case Opt_commit: | |
1294 | if (match_int(&args[0], &option)) | |
1295 | return 0; | |
1296 | if (option < 0) | |
1297 | return 0; | |
1298 | if (option == 0) | |
cd02ff0b | 1299 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1300 | sbi->s_commit_interval = HZ * option; |
1301 | break; | |
30773840 TT |
1302 | case Opt_max_batch_time: |
1303 | if (match_int(&args[0], &option)) | |
1304 | return 0; | |
1305 | if (option < 0) | |
1306 | return 0; | |
1307 | if (option == 0) | |
1308 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1309 | sbi->s_max_batch_time = option; | |
1310 | break; | |
1311 | case Opt_min_batch_time: | |
1312 | if (match_int(&args[0], &option)) | |
1313 | return 0; | |
1314 | if (option < 0) | |
1315 | return 0; | |
1316 | sbi->s_min_batch_time = option; | |
1317 | break; | |
ac27a0ec | 1318 | case Opt_data_journal: |
617ba13b | 1319 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1320 | goto datacheck; |
1321 | case Opt_data_ordered: | |
617ba13b | 1322 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1323 | goto datacheck; |
1324 | case Opt_data_writeback: | |
617ba13b | 1325 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1326 | datacheck: |
1327 | if (is_remount) { | |
617ba13b | 1328 | if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) |
ac27a0ec DK |
1329 | != data_opt) { |
1330 | printk(KERN_ERR | |
617ba13b | 1331 | "EXT4-fs: cannot change data " |
ac27a0ec DK |
1332 | "mode on remount\n"); |
1333 | return 0; | |
1334 | } | |
1335 | } else { | |
617ba13b | 1336 | sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; |
ac27a0ec DK |
1337 | sbi->s_mount_opt |= data_opt; |
1338 | } | |
1339 | break; | |
5bf5683a HK |
1340 | case Opt_data_err_abort: |
1341 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1342 | break; | |
1343 | case Opt_data_err_ignore: | |
1344 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1345 | break; | |
f4033903 CW |
1346 | case Opt_mb_history_length: |
1347 | if (match_int(&args[0], &option)) | |
1348 | return 0; | |
1349 | if (option < 0) | |
1350 | return 0; | |
1351 | sbi->s_mb_history_max = option; | |
1352 | break; | |
ac27a0ec DK |
1353 | #ifdef CONFIG_QUOTA |
1354 | case Opt_usrjquota: | |
1355 | qtype = USRQUOTA; | |
1356 | goto set_qf_name; | |
1357 | case Opt_grpjquota: | |
1358 | qtype = GRPQUOTA; | |
1359 | set_qf_name: | |
17bd13b3 | 1360 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1361 | !sbi->s_qf_names[qtype]) { |
ac27a0ec | 1362 | printk(KERN_ERR |
4776004f TT |
1363 | "EXT4-fs: Cannot change journaled " |
1364 | "quota options when quota turned on.\n"); | |
ac27a0ec DK |
1365 | return 0; |
1366 | } | |
1367 | qname = match_strdup(&args[0]); | |
1368 | if (!qname) { | |
1369 | printk(KERN_ERR | |
617ba13b | 1370 | "EXT4-fs: not enough memory for " |
ac27a0ec DK |
1371 | "storing quotafile name.\n"); |
1372 | return 0; | |
1373 | } | |
1374 | if (sbi->s_qf_names[qtype] && | |
1375 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1376 | printk(KERN_ERR | |
617ba13b | 1377 | "EXT4-fs: %s quota file already " |
ac27a0ec DK |
1378 | "specified.\n", QTYPE2NAME(qtype)); |
1379 | kfree(qname); | |
1380 | return 0; | |
1381 | } | |
1382 | sbi->s_qf_names[qtype] = qname; | |
1383 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1384 | printk(KERN_ERR | |
617ba13b | 1385 | "EXT4-fs: quotafile must be on " |
ac27a0ec DK |
1386 | "filesystem root.\n"); |
1387 | kfree(sbi->s_qf_names[qtype]); | |
1388 | sbi->s_qf_names[qtype] = NULL; | |
1389 | return 0; | |
1390 | } | |
1391 | set_opt(sbi->s_mount_opt, QUOTA); | |
1392 | break; | |
1393 | case Opt_offusrjquota: | |
1394 | qtype = USRQUOTA; | |
1395 | goto clear_qf_name; | |
1396 | case Opt_offgrpjquota: | |
1397 | qtype = GRPQUOTA; | |
1398 | clear_qf_name: | |
17bd13b3 | 1399 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1400 | sbi->s_qf_names[qtype]) { |
617ba13b | 1401 | printk(KERN_ERR "EXT4-fs: Cannot change " |
2c8be6b2 | 1402 | "journaled quota options when " |
ac27a0ec DK |
1403 | "quota turned on.\n"); |
1404 | return 0; | |
1405 | } | |
1406 | /* | |
1407 | * The space will be released later when all options | |
1408 | * are confirmed to be correct | |
1409 | */ | |
1410 | sbi->s_qf_names[qtype] = NULL; | |
1411 | break; | |
1412 | case Opt_jqfmt_vfsold: | |
dfc5d03f JK |
1413 | qfmt = QFMT_VFS_OLD; |
1414 | goto set_qf_format; | |
ac27a0ec | 1415 | case Opt_jqfmt_vfsv0: |
dfc5d03f JK |
1416 | qfmt = QFMT_VFS_V0; |
1417 | set_qf_format: | |
17bd13b3 | 1418 | if (sb_any_quota_loaded(sb) && |
dfc5d03f JK |
1419 | sbi->s_jquota_fmt != qfmt) { |
1420 | printk(KERN_ERR "EXT4-fs: Cannot change " | |
1421 | "journaled quota options when " | |
1422 | "quota turned on.\n"); | |
1423 | return 0; | |
1424 | } | |
1425 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1426 | break; |
1427 | case Opt_quota: | |
1428 | case Opt_usrquota: | |
1429 | set_opt(sbi->s_mount_opt, QUOTA); | |
1430 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1431 | break; | |
1432 | case Opt_grpquota: | |
1433 | set_opt(sbi->s_mount_opt, QUOTA); | |
1434 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1435 | break; | |
1436 | case Opt_noquota: | |
17bd13b3 | 1437 | if (sb_any_quota_loaded(sb)) { |
617ba13b | 1438 | printk(KERN_ERR "EXT4-fs: Cannot change quota " |
ac27a0ec DK |
1439 | "options when quota turned on.\n"); |
1440 | return 0; | |
1441 | } | |
1442 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1443 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1444 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1445 | break; | |
1446 | #else | |
1447 | case Opt_quota: | |
1448 | case Opt_usrquota: | |
1449 | case Opt_grpquota: | |
cd59e7b9 JK |
1450 | printk(KERN_ERR |
1451 | "EXT4-fs: quota options not supported.\n"); | |
1452 | break; | |
ac27a0ec DK |
1453 | case Opt_usrjquota: |
1454 | case Opt_grpjquota: | |
1455 | case Opt_offusrjquota: | |
1456 | case Opt_offgrpjquota: | |
1457 | case Opt_jqfmt_vfsold: | |
1458 | case Opt_jqfmt_vfsv0: | |
1459 | printk(KERN_ERR | |
cd59e7b9 | 1460 | "EXT4-fs: journaled quota options not " |
ac27a0ec DK |
1461 | "supported.\n"); |
1462 | break; | |
1463 | case Opt_noquota: | |
1464 | break; | |
1465 | #endif | |
1466 | case Opt_abort: | |
1467 | set_opt(sbi->s_mount_opt, ABORT); | |
1468 | break; | |
06705bff TT |
1469 | case Opt_nobarrier: |
1470 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1471 | break; | |
ac27a0ec | 1472 | case Opt_barrier: |
06705bff TT |
1473 | if (match_int(&args[0], &option)) { |
1474 | set_opt(sbi->s_mount_opt, BARRIER); | |
1475 | break; | |
1476 | } | |
ac27a0ec DK |
1477 | if (option) |
1478 | set_opt(sbi->s_mount_opt, BARRIER); | |
1479 | else | |
1480 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1481 | break; | |
1482 | case Opt_ignore: | |
1483 | break; | |
1484 | case Opt_resize: | |
1485 | if (!is_remount) { | |
617ba13b | 1486 | printk("EXT4-fs: resize option only available " |
ac27a0ec DK |
1487 | "for remount\n"); |
1488 | return 0; | |
1489 | } | |
1490 | if (match_int(&args[0], &option) != 0) | |
1491 | return 0; | |
1492 | *n_blocks_count = option; | |
1493 | break; | |
1494 | case Opt_nobh: | |
1495 | set_opt(sbi->s_mount_opt, NOBH); | |
1496 | break; | |
1497 | case Opt_bh: | |
1498 | clear_opt(sbi->s_mount_opt, NOBH); | |
1499 | break; | |
25ec56b5 JNC |
1500 | case Opt_i_version: |
1501 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1502 | sb->s_flags |= MS_I_VERSION; | |
1503 | break; | |
dd919b98 AK |
1504 | case Opt_nodelalloc: |
1505 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1506 | break; | |
c9de560d AT |
1507 | case Opt_stripe: |
1508 | if (match_int(&args[0], &option)) | |
1509 | return 0; | |
1510 | if (option < 0) | |
1511 | return 0; | |
1512 | sbi->s_stripe = option; | |
1513 | break; | |
64769240 AT |
1514 | case Opt_delalloc: |
1515 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1516 | break; | |
6fd058f7 TT |
1517 | case Opt_block_validity: |
1518 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1519 | break; | |
1520 | case Opt_noblock_validity: | |
1521 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1522 | break; | |
240799cd TT |
1523 | case Opt_inode_readahead_blks: |
1524 | if (match_int(&args[0], &option)) | |
1525 | return 0; | |
1526 | if (option < 0 || option > (1 << 30)) | |
1527 | return 0; | |
f7c43950 | 1528 | if (!is_power_of_2(option)) { |
3197ebdb TT |
1529 | printk(KERN_ERR "EXT4-fs: inode_readahead_blks" |
1530 | " must be a power of 2\n"); | |
1531 | return 0; | |
1532 | } | |
240799cd TT |
1533 | sbi->s_inode_readahead_blks = option; |
1534 | break; | |
b3881f74 TT |
1535 | case Opt_journal_ioprio: |
1536 | if (match_int(&args[0], &option)) | |
1537 | return 0; | |
1538 | if (option < 0 || option > 7) | |
1539 | break; | |
1540 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1541 | option); | |
1542 | break; | |
06705bff TT |
1543 | case Opt_noauto_da_alloc: |
1544 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1545 | break; | |
afd4672d | 1546 | case Opt_auto_da_alloc: |
06705bff TT |
1547 | if (match_int(&args[0], &option)) { |
1548 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1549 | break; | |
1550 | } | |
afd4672d TT |
1551 | if (option) |
1552 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1553 | else | |
1554 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1555 | break; | |
ac27a0ec | 1556 | default: |
2b2d6d01 TT |
1557 | printk(KERN_ERR |
1558 | "EXT4-fs: Unrecognized mount option \"%s\" " | |
1559 | "or missing value\n", p); | |
ac27a0ec DK |
1560 | return 0; |
1561 | } | |
1562 | } | |
1563 | #ifdef CONFIG_QUOTA | |
1564 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
617ba13b | 1565 | if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && |
ac27a0ec DK |
1566 | sbi->s_qf_names[USRQUOTA]) |
1567 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1568 | ||
617ba13b | 1569 | if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && |
ac27a0ec DK |
1570 | sbi->s_qf_names[GRPQUOTA]) |
1571 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1572 | ||
1573 | if ((sbi->s_qf_names[USRQUOTA] && | |
617ba13b | 1574 | (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || |
ac27a0ec | 1575 | (sbi->s_qf_names[GRPQUOTA] && |
617ba13b MC |
1576 | (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { |
1577 | printk(KERN_ERR "EXT4-fs: old and new quota " | |
ac27a0ec DK |
1578 | "format mixing.\n"); |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | if (!sbi->s_jquota_fmt) { | |
2c8be6b2 | 1583 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
ac27a0ec DK |
1584 | "not specified.\n"); |
1585 | return 0; | |
1586 | } | |
1587 | } else { | |
1588 | if (sbi->s_jquota_fmt) { | |
2c8be6b2 JK |
1589 | printk(KERN_ERR "EXT4-fs: journaled quota format " |
1590 | "specified with no journaling " | |
ac27a0ec DK |
1591 | "enabled.\n"); |
1592 | return 0; | |
1593 | } | |
1594 | } | |
1595 | #endif | |
1596 | return 1; | |
1597 | } | |
1598 | ||
617ba13b | 1599 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1600 | int read_only) |
1601 | { | |
617ba13b | 1602 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1603 | int res = 0; |
1604 | ||
617ba13b | 1605 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
2b2d6d01 TT |
1606 | printk(KERN_ERR "EXT4-fs warning: revision level too high, " |
1607 | "forcing read-only mode\n"); | |
ac27a0ec DK |
1608 | res = MS_RDONLY; |
1609 | } | |
1610 | if (read_only) | |
1611 | return res; | |
617ba13b | 1612 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
2b2d6d01 TT |
1613 | printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " |
1614 | "running e2fsck is recommended\n"); | |
617ba13b | 1615 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
2b2d6d01 TT |
1616 | printk(KERN_WARNING |
1617 | "EXT4-fs warning: mounting fs with errors, " | |
1618 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1619 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1620 | le16_to_cpu(es->s_mnt_count) >= | |
1621 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
2b2d6d01 TT |
1622 | printk(KERN_WARNING |
1623 | "EXT4-fs warning: maximal mount count reached, " | |
1624 | "running e2fsck is recommended\n"); | |
ac27a0ec DK |
1625 | else if (le32_to_cpu(es->s_checkinterval) && |
1626 | (le32_to_cpu(es->s_lastcheck) + | |
1627 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
2b2d6d01 TT |
1628 | printk(KERN_WARNING |
1629 | "EXT4-fs warning: checktime reached, " | |
1630 | "running e2fsck is recommended\n"); | |
0b8e58a1 | 1631 | if (!sbi->s_journal) |
0390131b | 1632 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1633 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1634 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1635 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1636 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1637 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1638 | if (sbi->s_journal) |
1639 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1640 | |
e2d67052 | 1641 | ext4_commit_super(sb, 1); |
ac27a0ec | 1642 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1643 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
ac27a0ec DK |
1644 | "bpg=%lu, ipg=%lu, mo=%04lx]\n", |
1645 | sb->s_blocksize, | |
1646 | sbi->s_groups_count, | |
617ba13b MC |
1647 | EXT4_BLOCKS_PER_GROUP(sb), |
1648 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1649 | sbi->s_mount_opt); |
1650 | ||
0390131b FM |
1651 | if (EXT4_SB(sb)->s_journal) { |
1652 | printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", | |
1653 | sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : | |
1654 | "external", EXT4_SB(sb)->s_journal->j_devname); | |
1655 | } else { | |
1656 | printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); | |
1657 | } | |
ac27a0ec DK |
1658 | return res; |
1659 | } | |
1660 | ||
772cb7c8 JS |
1661 | static int ext4_fill_flex_info(struct super_block *sb) |
1662 | { | |
1663 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1664 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1665 | ext4_group_t flex_group_count; |
1666 | ext4_group_t flex_group; | |
1667 | int groups_per_flex = 0; | |
c5ca7c76 | 1668 | size_t size; |
772cb7c8 JS |
1669 | int i; |
1670 | ||
1671 | if (!sbi->s_es->s_log_groups_per_flex) { | |
1672 | sbi->s_log_groups_per_flex = 0; | |
1673 | return 1; | |
1674 | } | |
1675 | ||
1676 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; | |
1677 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1678 | ||
c62a11fd FB |
1679 | /* We allocate both existing and potentially added groups */ |
1680 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1681 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1682 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1683 | size = flex_group_count * sizeof(struct flex_groups); |
1684 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1685 | if (sbi->s_flex_groups == NULL) { | |
1686 | sbi->s_flex_groups = vmalloc(size); | |
1687 | if (sbi->s_flex_groups) | |
1688 | memset(sbi->s_flex_groups, 0, size); | |
1689 | } | |
772cb7c8 | 1690 | if (sbi->s_flex_groups == NULL) { |
ec05e868 | 1691 | printk(KERN_ERR "EXT4-fs: not enough memory for " |
a9df9a49 | 1692 | "%u flex groups\n", flex_group_count); |
772cb7c8 JS |
1693 | goto failed; |
1694 | } | |
772cb7c8 | 1695 | |
772cb7c8 | 1696 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1697 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1698 | |
1699 | flex_group = ext4_flex_group(sbi, i); | |
9f24e420 TT |
1700 | atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, |
1701 | ext4_free_inodes_count(sb, gdp)); | |
1702 | atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, | |
1703 | ext4_free_blks_count(sb, gdp)); | |
7d39db14 TT |
1704 | atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, |
1705 | ext4_used_dirs_count(sb, gdp)); | |
772cb7c8 JS |
1706 | } |
1707 | ||
1708 | return 1; | |
1709 | failed: | |
1710 | return 0; | |
1711 | } | |
1712 | ||
717d50e4 AD |
1713 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1714 | struct ext4_group_desc *gdp) | |
1715 | { | |
1716 | __u16 crc = 0; | |
1717 | ||
1718 | if (sbi->s_es->s_feature_ro_compat & | |
1719 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1720 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1721 | __le32 le_group = cpu_to_le32(block_group); | |
1722 | ||
1723 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1724 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1725 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1726 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1727 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1728 | if ((sbi->s_es->s_feature_incompat & | |
1729 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1730 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1731 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1732 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1733 | offset); | |
1734 | } | |
1735 | ||
1736 | return cpu_to_le16(crc); | |
1737 | } | |
1738 | ||
1739 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1740 | struct ext4_group_desc *gdp) | |
1741 | { | |
1742 | if ((sbi->s_es->s_feature_ro_compat & | |
1743 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1744 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1745 | return 0; | |
1746 | ||
1747 | return 1; | |
1748 | } | |
1749 | ||
ac27a0ec | 1750 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1751 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1752 | { |
617ba13b MC |
1753 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1754 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1755 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1756 | ext4_fsblk_t block_bitmap; |
1757 | ext4_fsblk_t inode_bitmap; | |
1758 | ext4_fsblk_t inode_table; | |
ce421581 | 1759 | int flexbg_flag = 0; |
fd2d4291 | 1760 | ext4_group_t i; |
ac27a0ec | 1761 | |
ce421581 JS |
1762 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1763 | flexbg_flag = 1; | |
1764 | ||
af5bc92d | 1765 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1766 | |
197cd65a AM |
1767 | for (i = 0; i < sbi->s_groups_count; i++) { |
1768 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1769 | ||
ce421581 | 1770 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1771 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1772 | else |
1773 | last_block = first_block + | |
617ba13b | 1774 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1775 | |
8fadc143 | 1776 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1777 | if (block_bitmap < first_block || block_bitmap > last_block) { |
c19204b0 | 1778 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1779 | "Block bitmap for group %u not in group " |
5128273a | 1780 | "(block %llu)!\n", i, block_bitmap); |
ac27a0ec DK |
1781 | return 0; |
1782 | } | |
8fadc143 | 1783 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1784 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
c19204b0 | 1785 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1786 | "Inode bitmap for group %u not in group " |
5128273a | 1787 | "(block %llu)!\n", i, inode_bitmap); |
ac27a0ec DK |
1788 | return 0; |
1789 | } | |
8fadc143 | 1790 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1791 | if (inode_table < first_block || |
2b2d6d01 | 1792 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
c19204b0 | 1793 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1794 | "Inode table for group %u not in group " |
5128273a | 1795 | "(block %llu)!\n", i, inode_table); |
ac27a0ec DK |
1796 | return 0; |
1797 | } | |
955ce5f5 | 1798 | ext4_lock_group(sb, i); |
717d50e4 | 1799 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
c19204b0 | 1800 | printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " |
a9df9a49 | 1801 | "Checksum for group %u failed (%u!=%u)\n", |
c19204b0 JB |
1802 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, |
1803 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 1804 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 1805 | ext4_unlock_group(sb, i); |
8a266467 | 1806 | return 0; |
7ee1ec4c | 1807 | } |
717d50e4 | 1808 | } |
955ce5f5 | 1809 | ext4_unlock_group(sb, i); |
ce421581 JS |
1810 | if (!flexbg_flag) |
1811 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1812 | } |
1813 | ||
bd81d8ee | 1814 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 1815 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1816 | return 1; |
1817 | } | |
1818 | ||
617ba13b | 1819 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1820 | * the superblock) which were deleted from all directories, but held open by |
1821 | * a process at the time of a crash. We walk the list and try to delete these | |
1822 | * inodes at recovery time (only with a read-write filesystem). | |
1823 | * | |
1824 | * In order to keep the orphan inode chain consistent during traversal (in | |
1825 | * case of crash during recovery), we link each inode into the superblock | |
1826 | * orphan list_head and handle it the same way as an inode deletion during | |
1827 | * normal operation (which journals the operations for us). | |
1828 | * | |
1829 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1830 | * accidentally point at an in-use or already deleted inode. The worst that | |
1831 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1832 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1833 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1834 | * inode cleanup for us, so we can safely abort without any further action. | |
1835 | */ | |
2b2d6d01 TT |
1836 | static void ext4_orphan_cleanup(struct super_block *sb, |
1837 | struct ext4_super_block *es) | |
ac27a0ec DK |
1838 | { |
1839 | unsigned int s_flags = sb->s_flags; | |
1840 | int nr_orphans = 0, nr_truncates = 0; | |
1841 | #ifdef CONFIG_QUOTA | |
1842 | int i; | |
1843 | #endif | |
1844 | if (!es->s_last_orphan) { | |
1845 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1846 | return; | |
1847 | } | |
1848 | ||
a8f48a95 ES |
1849 | if (bdev_read_only(sb->s_bdev)) { |
1850 | printk(KERN_ERR "EXT4-fs: write access " | |
1851 | "unavailable, skipping orphan cleanup.\n"); | |
1852 | return; | |
1853 | } | |
1854 | ||
617ba13b | 1855 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1856 | if (es->s_last_orphan) |
1857 | jbd_debug(1, "Errors on filesystem, " | |
1858 | "clearing orphan list.\n"); | |
1859 | es->s_last_orphan = 0; | |
1860 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
1861 | return; | |
1862 | } | |
1863 | ||
1864 | if (s_flags & MS_RDONLY) { | |
617ba13b | 1865 | printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", |
ac27a0ec DK |
1866 | sb->s_id); |
1867 | sb->s_flags &= ~MS_RDONLY; | |
1868 | } | |
1869 | #ifdef CONFIG_QUOTA | |
1870 | /* Needed for iput() to work correctly and not trash data */ | |
1871 | sb->s_flags |= MS_ACTIVE; | |
1872 | /* Turn on quotas so that they are updated correctly */ | |
1873 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
1874 | if (EXT4_SB(sb)->s_qf_names[i]) { |
1875 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec DK |
1876 | if (ret < 0) |
1877 | printk(KERN_ERR | |
2c8be6b2 | 1878 | "EXT4-fs: Cannot turn on journaled " |
ac27a0ec DK |
1879 | "quota: error %d\n", ret); |
1880 | } | |
1881 | } | |
1882 | #endif | |
1883 | ||
1884 | while (es->s_last_orphan) { | |
1885 | struct inode *inode; | |
1886 | ||
97bd42b9 JB |
1887 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
1888 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
1889 | es->s_last_orphan = 0; |
1890 | break; | |
1891 | } | |
1892 | ||
617ba13b | 1893 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
a269eb18 | 1894 | vfs_dq_init(inode); |
ac27a0ec DK |
1895 | if (inode->i_nlink) { |
1896 | printk(KERN_DEBUG | |
e5f8eab8 | 1897 | "%s: truncating inode %lu to %lld bytes\n", |
46e665e9 | 1898 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 1899 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 1900 | inode->i_ino, inode->i_size); |
617ba13b | 1901 | ext4_truncate(inode); |
ac27a0ec DK |
1902 | nr_truncates++; |
1903 | } else { | |
1904 | printk(KERN_DEBUG | |
1905 | "%s: deleting unreferenced inode %lu\n", | |
46e665e9 | 1906 | __func__, inode->i_ino); |
ac27a0ec DK |
1907 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
1908 | inode->i_ino); | |
1909 | nr_orphans++; | |
1910 | } | |
1911 | iput(inode); /* The delete magic happens here! */ | |
1912 | } | |
1913 | ||
2b2d6d01 | 1914 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
1915 | |
1916 | if (nr_orphans) | |
617ba13b | 1917 | printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", |
ac27a0ec DK |
1918 | sb->s_id, PLURAL(nr_orphans)); |
1919 | if (nr_truncates) | |
617ba13b | 1920 | printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", |
ac27a0ec DK |
1921 | sb->s_id, PLURAL(nr_truncates)); |
1922 | #ifdef CONFIG_QUOTA | |
1923 | /* Turn quotas off */ | |
1924 | for (i = 0; i < MAXQUOTAS; i++) { | |
1925 | if (sb_dqopt(sb)->files[i]) | |
6f28e087 | 1926 | vfs_quota_off(sb, i, 0); |
ac27a0ec DK |
1927 | } |
1928 | #endif | |
1929 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
1930 | } | |
0b8e58a1 | 1931 | |
cd2291a4 ES |
1932 | /* |
1933 | * Maximal extent format file size. | |
1934 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
1935 | * extent format containers, within a sector_t, and within i_blocks | |
1936 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
1937 | * so that won't be a limiting factor. | |
1938 | * | |
1939 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
1940 | */ | |
f287a1a5 | 1941 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
1942 | { |
1943 | loff_t res; | |
1944 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
1945 | ||
1946 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 1947 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 1948 | /* |
b3a6ffe1 | 1949 | * CONFIG_LBD is not enabled implies the inode |
cd2291a4 ES |
1950 | * i_block represent total blocks in 512 bytes |
1951 | * 32 == size of vfs inode i_blocks * 8 | |
1952 | */ | |
1953 | upper_limit = (1LL << 32) - 1; | |
1954 | ||
1955 | /* total blocks in file system block size */ | |
1956 | upper_limit >>= (blkbits - 9); | |
1957 | upper_limit <<= blkbits; | |
1958 | } | |
1959 | ||
1960 | /* 32-bit extent-start container, ee_block */ | |
1961 | res = 1LL << 32; | |
1962 | res <<= blkbits; | |
1963 | res -= 1; | |
1964 | ||
1965 | /* Sanity check against vm- & vfs- imposed limits */ | |
1966 | if (res > upper_limit) | |
1967 | res = upper_limit; | |
1968 | ||
1969 | return res; | |
1970 | } | |
ac27a0ec | 1971 | |
ac27a0ec | 1972 | /* |
cd2291a4 | 1973 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
1974 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
1975 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 1976 | */ |
f287a1a5 | 1977 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 1978 | { |
617ba13b | 1979 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
1980 | int meta_blocks; |
1981 | loff_t upper_limit; | |
0b8e58a1 AD |
1982 | /* This is calculated to be the largest file size for a dense, block |
1983 | * mapped file such that the file's total number of 512-byte sectors, | |
1984 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
1985 | * | |
1986 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
1987 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
1988 | */ |
1989 | ||
f287a1a5 | 1990 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 1991 | /* |
0b8e58a1 AD |
1992 | * !has_huge_files or CONFIG_LBD not enabled implies that |
1993 | * the inode i_block field represents total file blocks in | |
1994 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
1995 | */ |
1996 | upper_limit = (1LL << 32) - 1; | |
1997 | ||
1998 | /* total blocks in file system block size */ | |
1999 | upper_limit >>= (bits - 9); | |
2000 | ||
2001 | } else { | |
8180a562 AK |
2002 | /* |
2003 | * We use 48 bit ext4_inode i_blocks | |
2004 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2005 | * represent total number of blocks in | |
2006 | * file system block size | |
2007 | */ | |
0fc1b451 AK |
2008 | upper_limit = (1LL << 48) - 1; |
2009 | ||
0fc1b451 AK |
2010 | } |
2011 | ||
2012 | /* indirect blocks */ | |
2013 | meta_blocks = 1; | |
2014 | /* double indirect blocks */ | |
2015 | meta_blocks += 1 + (1LL << (bits-2)); | |
2016 | /* tripple indirect blocks */ | |
2017 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2018 | ||
2019 | upper_limit -= meta_blocks; | |
2020 | upper_limit <<= bits; | |
ac27a0ec DK |
2021 | |
2022 | res += 1LL << (bits-2); | |
2023 | res += 1LL << (2*(bits-2)); | |
2024 | res += 1LL << (3*(bits-2)); | |
2025 | res <<= bits; | |
2026 | if (res > upper_limit) | |
2027 | res = upper_limit; | |
0fc1b451 AK |
2028 | |
2029 | if (res > MAX_LFS_FILESIZE) | |
2030 | res = MAX_LFS_FILESIZE; | |
2031 | ||
ac27a0ec DK |
2032 | return res; |
2033 | } | |
2034 | ||
617ba13b | 2035 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2036 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2037 | { |
617ba13b | 2038 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2039 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2040 | int has_super = 0; |
2041 | ||
2042 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2043 | ||
617ba13b | 2044 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2045 | nr < first_meta_bg) |
70bbb3e0 | 2046 | return logical_sb_block + nr + 1; |
ac27a0ec | 2047 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2048 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2049 | has_super = 1; |
0b8e58a1 | 2050 | |
617ba13b | 2051 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2052 | } |
2053 | ||
c9de560d AT |
2054 | /** |
2055 | * ext4_get_stripe_size: Get the stripe size. | |
2056 | * @sbi: In memory super block info | |
2057 | * | |
2058 | * If we have specified it via mount option, then | |
2059 | * use the mount option value. If the value specified at mount time is | |
2060 | * greater than the blocks per group use the super block value. | |
2061 | * If the super block value is greater than blocks per group return 0. | |
2062 | * Allocator needs it be less than blocks per group. | |
2063 | * | |
2064 | */ | |
2065 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2066 | { | |
2067 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2068 | unsigned long stripe_width = | |
2069 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2070 | ||
2071 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2072 | return sbi->s_stripe; | |
2073 | ||
2074 | if (stripe_width <= sbi->s_blocks_per_group) | |
2075 | return stripe_width; | |
2076 | ||
2077 | if (stride <= sbi->s_blocks_per_group) | |
2078 | return stride; | |
2079 | ||
2080 | return 0; | |
2081 | } | |
ac27a0ec | 2082 | |
3197ebdb TT |
2083 | /* sysfs supprt */ |
2084 | ||
2085 | struct ext4_attr { | |
2086 | struct attribute attr; | |
2087 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
2088 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, | |
2089 | const char *, size_t); | |
2090 | int offset; | |
2091 | }; | |
2092 | ||
2093 | static int parse_strtoul(const char *buf, | |
2094 | unsigned long max, unsigned long *value) | |
2095 | { | |
2096 | char *endp; | |
2097 | ||
2098 | while (*buf && isspace(*buf)) | |
2099 | buf++; | |
2100 | *value = simple_strtoul(buf, &endp, 0); | |
2101 | while (*endp && isspace(*endp)) | |
2102 | endp++; | |
2103 | if (*endp || *value > max) | |
2104 | return -EINVAL; | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2110 | struct ext4_sb_info *sbi, | |
2111 | char *buf) | |
2112 | { | |
2113 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2114 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2115 | } | |
2116 | ||
2117 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2118 | struct ext4_sb_info *sbi, char *buf) | |
2119 | { | |
2120 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2121 | ||
2122 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2123 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2124 | sbi->s_sectors_written_start) >> 1); | |
2125 | } | |
2126 | ||
2127 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2128 | struct ext4_sb_info *sbi, char *buf) | |
2129 | { | |
2130 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2131 | ||
2132 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2133 | sbi->s_kbytes_written + | |
2134 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2135 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
2136 | } | |
2137 | ||
2138 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2139 | struct ext4_sb_info *sbi, | |
2140 | const char *buf, size_t count) | |
2141 | { | |
2142 | unsigned long t; | |
2143 | ||
2144 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2145 | return -EINVAL; | |
2146 | ||
f7c43950 | 2147 | if (!is_power_of_2(t)) |
3197ebdb TT |
2148 | return -EINVAL; |
2149 | ||
2150 | sbi->s_inode_readahead_blks = t; | |
2151 | return count; | |
2152 | } | |
2153 | ||
2154 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2155 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2156 | { |
2157 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2158 | ||
2159 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2160 | } | |
2161 | ||
2162 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2163 | struct ext4_sb_info *sbi, | |
2164 | const char *buf, size_t count) | |
2165 | { | |
2166 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2167 | unsigned long t; | |
2168 | ||
2169 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2170 | return -EINVAL; | |
2171 | *ui = t; | |
2172 | return count; | |
2173 | } | |
2174 | ||
2175 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2176 | static struct ext4_attr ext4_attr_##_name = { \ | |
2177 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2178 | .show = _show, \ | |
2179 | .store = _store, \ | |
2180 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2181 | } | |
2182 | #define EXT4_ATTR(name, mode, show, store) \ | |
2183 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2184 | ||
2185 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2186 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2187 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2188 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2189 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2190 | ||
2191 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2192 | EXT4_RO_ATTR(session_write_kbytes); | |
2193 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2194 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2195 | inode_readahead_blks_store, s_inode_readahead_blks); | |
2196 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); | |
2197 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2198 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2199 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2200 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2201 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
2202 | ||
2203 | static struct attribute *ext4_attrs[] = { | |
2204 | ATTR_LIST(delayed_allocation_blocks), | |
2205 | ATTR_LIST(session_write_kbytes), | |
2206 | ATTR_LIST(lifetime_write_kbytes), | |
2207 | ATTR_LIST(inode_readahead_blks), | |
2208 | ATTR_LIST(mb_stats), | |
2209 | ATTR_LIST(mb_max_to_scan), | |
2210 | ATTR_LIST(mb_min_to_scan), | |
2211 | ATTR_LIST(mb_order2_req), | |
2212 | ATTR_LIST(mb_stream_req), | |
2213 | ATTR_LIST(mb_group_prealloc), | |
2214 | NULL, | |
2215 | }; | |
2216 | ||
2217 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2218 | struct attribute *attr, char *buf) | |
2219 | { | |
2220 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2221 | s_kobj); | |
2222 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2223 | ||
2224 | return a->show ? a->show(a, sbi, buf) : 0; | |
2225 | } | |
2226 | ||
2227 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2228 | struct attribute *attr, | |
2229 | const char *buf, size_t len) | |
2230 | { | |
2231 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2232 | s_kobj); | |
2233 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2234 | ||
2235 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2236 | } | |
2237 | ||
2238 | static void ext4_sb_release(struct kobject *kobj) | |
2239 | { | |
2240 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2241 | s_kobj); | |
2242 | complete(&sbi->s_kobj_unregister); | |
2243 | } | |
2244 | ||
2245 | ||
2246 | static struct sysfs_ops ext4_attr_ops = { | |
2247 | .show = ext4_attr_show, | |
2248 | .store = ext4_attr_store, | |
2249 | }; | |
2250 | ||
2251 | static struct kobj_type ext4_ktype = { | |
2252 | .default_attrs = ext4_attrs, | |
2253 | .sysfs_ops = &ext4_attr_ops, | |
2254 | .release = ext4_sb_release, | |
2255 | }; | |
2256 | ||
2b2d6d01 | 2257 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2258 | __releases(kernel_lock) |
2259 | __acquires(kernel_lock) | |
ac27a0ec | 2260 | { |
2b2d6d01 | 2261 | struct buffer_head *bh; |
617ba13b MC |
2262 | struct ext4_super_block *es = NULL; |
2263 | struct ext4_sb_info *sbi; | |
2264 | ext4_fsblk_t block; | |
2265 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2266 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2267 | unsigned long offset = 0; |
ac27a0ec DK |
2268 | unsigned long journal_devnum = 0; |
2269 | unsigned long def_mount_opts; | |
2270 | struct inode *root; | |
9f6200bb | 2271 | char *cp; |
0390131b | 2272 | const char *descr; |
1d1fe1ee | 2273 | int ret = -EINVAL; |
ac27a0ec | 2274 | int blocksize; |
4ec11028 TT |
2275 | unsigned int db_count; |
2276 | unsigned int i; | |
f287a1a5 | 2277 | int needs_recovery, has_huge_files; |
3a06d778 | 2278 | int features; |
bd81d8ee | 2279 | __u64 blocks_count; |
833f4077 | 2280 | int err; |
b3881f74 | 2281 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2282 | |
2283 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2284 | if (!sbi) | |
2285 | return -ENOMEM; | |
705895b6 PE |
2286 | |
2287 | sbi->s_blockgroup_lock = | |
2288 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2289 | if (!sbi->s_blockgroup_lock) { | |
2290 | kfree(sbi); | |
2291 | return -ENOMEM; | |
2292 | } | |
ac27a0ec DK |
2293 | sb->s_fs_info = sbi; |
2294 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2295 | sbi->s_resuid = EXT4_DEF_RESUID; |
2296 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2297 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2298 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2299 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2300 | sectors[1]); | |
ac27a0ec DK |
2301 | |
2302 | unlock_kernel(); | |
2303 | ||
9f6200bb TT |
2304 | /* Cleanup superblock name */ |
2305 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2306 | *cp = '!'; | |
2307 | ||
617ba13b | 2308 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2309 | if (!blocksize) { |
617ba13b | 2310 | printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); |
ac27a0ec DK |
2311 | goto out_fail; |
2312 | } | |
2313 | ||
2314 | /* | |
617ba13b | 2315 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2316 | * block sizes. We need to calculate the offset from buffer start. |
2317 | */ | |
617ba13b | 2318 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2319 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2320 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2321 | } else { |
70bbb3e0 | 2322 | logical_sb_block = sb_block; |
ac27a0ec DK |
2323 | } |
2324 | ||
70bbb3e0 | 2325 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
2b2d6d01 | 2326 | printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); |
ac27a0ec DK |
2327 | goto out_fail; |
2328 | } | |
2329 | /* | |
2330 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2331 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2332 | */ |
617ba13b | 2333 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2334 | sbi->s_es = es; |
2335 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2336 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2337 | goto cantfind_ext4; | |
afc32f7e | 2338 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2339 | |
2340 | /* Set defaults before we parse the mount options */ | |
2341 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2342 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2343 | set_opt(sbi->s_mount_opt, DEBUG); |
617ba13b | 2344 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
ac27a0ec | 2345 | set_opt(sbi->s_mount_opt, GRPID); |
617ba13b | 2346 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2347 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2348 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2349 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2350 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2351 | #endif |
03010a33 | 2352 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2353 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2354 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2355 | #endif |
617ba13b MC |
2356 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
2357 | sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
2358 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
2359 | sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
2360 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
2361 | sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; | |
2362 | ||
2363 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2364 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2365 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2366 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2367 | else |
2368 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2369 | |
2370 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2371 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2372 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2373 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2374 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
f4033903 | 2375 | sbi->s_mb_history_max = default_mb_history_length; |
ac27a0ec | 2376 | |
571640ca | 2377 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2378 | |
dd919b98 AK |
2379 | /* |
2380 | * enable delayed allocation by default | |
2381 | * Use -o nodelalloc to turn it off | |
2382 | */ | |
2383 | set_opt(sbi->s_mount_opt, DELALLOC); | |
2384 | ||
b3881f74 TT |
2385 | if (!parse_options((char *) data, sb, &journal_devnum, |
2386 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2387 | goto failed_mount; |
2388 | ||
2389 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 2390 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2391 | |
617ba13b MC |
2392 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2393 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2394 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2395 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
ac27a0ec | 2396 | printk(KERN_WARNING |
617ba13b | 2397 | "EXT4-fs warning: feature flags set on rev 0 fs, " |
ac27a0ec | 2398 | "running e2fsck is recommended\n"); |
469108ff | 2399 | |
ac27a0ec DK |
2400 | /* |
2401 | * Check feature flags regardless of the revision level, since we | |
2402 | * previously didn't change the revision level when setting the flags, | |
2403 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2404 | */ | |
617ba13b | 2405 | features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); |
ac27a0ec | 2406 | if (features) { |
617ba13b | 2407 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " |
3a06d778 AK |
2408 | "unsupported optional features (%x).\n", sb->s_id, |
2409 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2410 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
ac27a0ec DK |
2411 | goto failed_mount; |
2412 | } | |
617ba13b | 2413 | features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); |
ac27a0ec | 2414 | if (!(sb->s_flags & MS_RDONLY) && features) { |
617ba13b | 2415 | printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " |
3a06d778 AK |
2416 | "unsupported optional features (%x).\n", sb->s_id, |
2417 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2418 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
2419 | goto failed_mount; |
2420 | } | |
f287a1a5 TT |
2421 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2422 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
2423 | if (has_huge_files) { | |
0fc1b451 AK |
2424 | /* |
2425 | * Large file size enabled file system can only be | |
b3a6ffe1 | 2426 | * mount if kernel is build with CONFIG_LBD |
0fc1b451 AK |
2427 | */ |
2428 | if (sizeof(root->i_blocks) < sizeof(u64) && | |
2429 | !(sb->s_flags & MS_RDONLY)) { | |
2430 | printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " | |
2431 | "files cannot be mounted read-write " | |
b3a6ffe1 | 2432 | "without CONFIG_LBD.\n", sb->s_id); |
0fc1b451 AK |
2433 | goto failed_mount; |
2434 | } | |
2435 | } | |
ac27a0ec DK |
2436 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2437 | ||
617ba13b MC |
2438 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2439 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
ac27a0ec | 2440 | printk(KERN_ERR |
617ba13b | 2441 | "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", |
ac27a0ec DK |
2442 | blocksize, sb->s_id); |
2443 | goto failed_mount; | |
2444 | } | |
2445 | ||
ac27a0ec | 2446 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2447 | /* Validate the filesystem blocksize */ |
2448 | if (!sb_set_blocksize(sb, blocksize)) { | |
2449 | printk(KERN_ERR "EXT4-fs: bad block size %d.\n", | |
2450 | blocksize); | |
ac27a0ec DK |
2451 | goto failed_mount; |
2452 | } | |
2453 | ||
2b2d6d01 | 2454 | brelse(bh); |
70bbb3e0 AM |
2455 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2456 | offset = do_div(logical_sb_block, blocksize); | |
2457 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec DK |
2458 | if (!bh) { |
2459 | printk(KERN_ERR | |
617ba13b | 2460 | "EXT4-fs: Can't read superblock on 2nd try.\n"); |
ac27a0ec DK |
2461 | goto failed_mount; |
2462 | } | |
617ba13b | 2463 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2464 | sbi->s_es = es; |
617ba13b | 2465 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
2b2d6d01 TT |
2466 | printk(KERN_ERR |
2467 | "EXT4-fs: Magic mismatch, very weird !\n"); | |
ac27a0ec DK |
2468 | goto failed_mount; |
2469 | } | |
2470 | } | |
2471 | ||
f287a1a5 TT |
2472 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2473 | has_huge_files); | |
2474 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2475 | |
617ba13b MC |
2476 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2477 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2478 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2479 | } else { |
2480 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2481 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2482 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2483 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2484 | (sbi->s_inode_size > blocksize)) { |
2b2d6d01 TT |
2485 | printk(KERN_ERR |
2486 | "EXT4-fs: unsupported inode size: %d\n", | |
2487 | sbi->s_inode_size); | |
ac27a0ec DK |
2488 | goto failed_mount; |
2489 | } | |
ef7f3835 KS |
2490 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2491 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2492 | } |
0b8e58a1 | 2493 | |
0d1ee42f AR |
2494 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2495 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2496 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2497 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2498 | !is_power_of_2(sbi->s_desc_size)) { |
0d1ee42f | 2499 | printk(KERN_ERR |
8fadc143 | 2500 | "EXT4-fs: unsupported descriptor size %lu\n", |
0d1ee42f AR |
2501 | sbi->s_desc_size); |
2502 | goto failed_mount; | |
2503 | } | |
2504 | } else | |
2505 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 2506 | |
ac27a0ec | 2507 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2508 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2509 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 2510 | goto cantfind_ext4; |
0b8e58a1 | 2511 | |
617ba13b | 2512 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 2513 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2514 | goto cantfind_ext4; |
ac27a0ec DK |
2515 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2516 | sbi->s_inodes_per_block; | |
0d1ee42f | 2517 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2518 | sbi->s_sbh = bh; |
2519 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2520 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2521 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 2522 | |
2b2d6d01 | 2523 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2524 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2525 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2526 | i = le32_to_cpu(es->s_flags); |
2527 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2528 | sbi->s_hash_unsigned = 3; | |
2529 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2530 | #ifdef __CHAR_UNSIGNED__ | |
2531 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2532 | sbi->s_hash_unsigned = 3; | |
2533 | #else | |
2534 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2535 | #endif | |
2536 | sb->s_dirt = 1; | |
2537 | } | |
ac27a0ec DK |
2538 | |
2539 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
2b2d6d01 TT |
2540 | printk(KERN_ERR |
2541 | "EXT4-fs: #blocks per group too big: %lu\n", | |
2542 | sbi->s_blocks_per_group); | |
ac27a0ec DK |
2543 | goto failed_mount; |
2544 | } | |
ac27a0ec | 2545 | if (sbi->s_inodes_per_group > blocksize * 8) { |
2b2d6d01 TT |
2546 | printk(KERN_ERR |
2547 | "EXT4-fs: #inodes per group too big: %lu\n", | |
2548 | sbi->s_inodes_per_group); | |
ac27a0ec DK |
2549 | goto failed_mount; |
2550 | } | |
2551 | ||
bd81d8ee | 2552 | if (ext4_blocks_count(es) > |
ac27a0ec | 2553 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { |
617ba13b | 2554 | printk(KERN_ERR "EXT4-fs: filesystem on %s:" |
ac27a0ec DK |
2555 | " too large to mount safely\n", sb->s_id); |
2556 | if (sizeof(sector_t) < 8) | |
617ba13b | 2557 | printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " |
ac27a0ec DK |
2558 | "enabled\n"); |
2559 | goto failed_mount; | |
2560 | } | |
2561 | ||
617ba13b MC |
2562 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2563 | goto cantfind_ext4; | |
e7c95593 | 2564 | |
0f2ddca6 FTN |
2565 | /* check blocks count against device size */ |
2566 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2567 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
2568 | printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu " | |
2569 | "exceeds size of device (%llu blocks)\n", | |
2570 | ext4_blocks_count(es), blocks_count); | |
2571 | goto failed_mount; | |
2572 | } | |
2573 | ||
0b8e58a1 AD |
2574 | /* |
2575 | * It makes no sense for the first data block to be beyond the end | |
2576 | * of the filesystem. | |
2577 | */ | |
2578 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
2579 | printk(KERN_WARNING "EXT4-fs: bad geometry: first data" | |
4ec11028 TT |
2580 | "block %u is beyond end of filesystem (%llu)\n", |
2581 | le32_to_cpu(es->s_first_data_block), | |
2582 | ext4_blocks_count(es)); | |
e7c95593 ES |
2583 | goto failed_mount; |
2584 | } | |
bd81d8ee LV |
2585 | blocks_count = (ext4_blocks_count(es) - |
2586 | le32_to_cpu(es->s_first_data_block) + | |
2587 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2588 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 TT |
2589 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
2590 | printk(KERN_WARNING "EXT4-fs: groups count too large: %u " | |
2591 | "(block count %llu, first data block %u, " | |
2592 | "blocks per group %lu)\n", sbi->s_groups_count, | |
2593 | ext4_blocks_count(es), | |
2594 | le32_to_cpu(es->s_first_data_block), | |
2595 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2596 | goto failed_mount; | |
2597 | } | |
bd81d8ee | 2598 | sbi->s_groups_count = blocks_count; |
617ba13b MC |
2599 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2600 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2601 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2602 | GFP_KERNEL); |
2603 | if (sbi->s_group_desc == NULL) { | |
2b2d6d01 | 2604 | printk(KERN_ERR "EXT4-fs: not enough memory\n"); |
ac27a0ec DK |
2605 | goto failed_mount; |
2606 | } | |
2607 | ||
3244fcb1 | 2608 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2609 | if (ext4_proc_root) |
2610 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2611 | #endif |
240799cd | 2612 | |
705895b6 | 2613 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2614 | |
2615 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2616 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2617 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2618 | if (!sbi->s_group_desc[i]) { | |
2b2d6d01 TT |
2619 | printk(KERN_ERR "EXT4-fs: " |
2620 | "can't read group descriptor %d\n", i); | |
ac27a0ec DK |
2621 | db_count = i; |
2622 | goto failed_mount2; | |
2623 | } | |
2624 | } | |
2b2d6d01 | 2625 | if (!ext4_check_descriptors(sb)) { |
617ba13b | 2626 | printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); |
ac27a0ec DK |
2627 | goto failed_mount2; |
2628 | } | |
772cb7c8 JS |
2629 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2630 | if (!ext4_fill_flex_info(sb)) { | |
2631 | printk(KERN_ERR | |
2632 | "EXT4-fs: unable to initialize " | |
2633 | "flex_bg meta info!\n"); | |
2634 | goto failed_mount2; | |
2635 | } | |
2636 | ||
ac27a0ec DK |
2637 | sbi->s_gdb_count = db_count; |
2638 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2639 | spin_lock_init(&sbi->s_next_gen_lock); | |
2640 | ||
833f4077 PZ |
2641 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2642 | ext4_count_free_blocks(sb)); | |
2643 | if (!err) { | |
2644 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2645 | ext4_count_free_inodes(sb)); | |
2646 | } | |
2647 | if (!err) { | |
2648 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2649 | ext4_count_dirs(sb)); | |
2650 | } | |
6bc6e63f AK |
2651 | if (!err) { |
2652 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2653 | } | |
833f4077 PZ |
2654 | if (err) { |
2655 | printk(KERN_ERR "EXT4-fs: insufficient memory\n"); | |
2656 | goto failed_mount3; | |
2657 | } | |
ac27a0ec | 2658 | |
c9de560d AT |
2659 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
2660 | ||
ac27a0ec DK |
2661 | /* |
2662 | * set up enough so that it can read an inode | |
2663 | */ | |
9ca92389 TT |
2664 | if (!test_opt(sb, NOLOAD) && |
2665 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
2666 | sb->s_op = &ext4_sops; | |
2667 | else | |
2668 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
2669 | sb->s_export_op = &ext4_export_ops; |
2670 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2671 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2672 | sb->s_qcop = &ext4_qctl_operations; |
2673 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2674 | #endif |
2675 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 2676 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 2677 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
2678 | |
2679 | sb->s_root = NULL; | |
2680 | ||
2681 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2682 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2683 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2684 | |
2685 | /* | |
2686 | * The first inode we look at is the journal inode. Don't try | |
2687 | * root first: it may be modified in the journal! | |
2688 | */ | |
2689 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2690 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2691 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2692 | goto failed_mount3; |
624080ed TT |
2693 | if (!(sb->s_flags & MS_RDONLY) && |
2694 | EXT4_SB(sb)->s_journal->j_failed_commit) { | |
2695 | printk(KERN_CRIT "EXT4-fs error (device %s): " | |
2696 | "ext4_fill_super: Journal transaction " | |
2b2d6d01 | 2697 | "%u is corrupt\n", sb->s_id, |
624080ed | 2698 | EXT4_SB(sb)->s_journal->j_failed_commit); |
2b2d6d01 TT |
2699 | if (test_opt(sb, ERRORS_RO)) { |
2700 | printk(KERN_CRIT | |
2701 | "Mounting filesystem read-only\n"); | |
624080ed TT |
2702 | sb->s_flags |= MS_RDONLY; |
2703 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2704 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
2705 | } | |
2706 | if (test_opt(sb, ERRORS_PANIC)) { | |
2707 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
2708 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 2709 | ext4_commit_super(sb, 1); |
624080ed TT |
2710 | goto failed_mount4; |
2711 | } | |
2712 | } | |
0390131b FM |
2713 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2714 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
2715 | printk(KERN_ERR "EXT4-fs: required journal recovery " | |
2716 | "suppressed and not mounted read-only\n"); | |
2717 | goto failed_mount4; | |
ac27a0ec | 2718 | } else { |
0390131b FM |
2719 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2720 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2721 | sbi->s_journal = NULL; | |
2722 | needs_recovery = 0; | |
2723 | goto no_journal; | |
ac27a0ec DK |
2724 | } |
2725 | ||
eb40a09c JS |
2726 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2727 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2728 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
abda1418 | 2729 | printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); |
eb40a09c JS |
2730 | goto failed_mount4; |
2731 | } | |
2732 | ||
818d276c GS |
2733 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2734 | jbd2_journal_set_features(sbi->s_journal, | |
2735 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2736 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2737 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
2738 | jbd2_journal_set_features(sbi->s_journal, | |
2739 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
2740 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
2741 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2742 | } else { | |
2743 | jbd2_journal_clear_features(sbi->s_journal, | |
2744 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2745 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2746 | } | |
2747 | ||
ac27a0ec DK |
2748 | /* We have now updated the journal if required, so we can |
2749 | * validate the data journaling mode. */ | |
2750 | switch (test_opt(sb, DATA_FLAGS)) { | |
2751 | case 0: | |
2752 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2753 | * capabilities: ORDERED_DATA if the journal can |
2754 | * cope, else JOURNAL_DATA | |
2755 | */ | |
dab291af MC |
2756 | if (jbd2_journal_check_available_features |
2757 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2758 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2759 | else | |
2760 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2761 | break; | |
2762 | ||
617ba13b MC |
2763 | case EXT4_MOUNT_ORDERED_DATA: |
2764 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2765 | if (!jbd2_journal_check_available_features |
2766 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
617ba13b | 2767 | printk(KERN_ERR "EXT4-fs: Journal does not support " |
ac27a0ec DK |
2768 | "requested data journaling mode\n"); |
2769 | goto failed_mount4; | |
2770 | } | |
2771 | default: | |
2772 | break; | |
2773 | } | |
b3881f74 | 2774 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2775 | |
0390131b | 2776 | no_journal: |
ac27a0ec DK |
2777 | |
2778 | if (test_opt(sb, NOBH)) { | |
617ba13b MC |
2779 | if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { |
2780 | printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " | |
ac27a0ec DK |
2781 | "its supported only with writeback mode\n"); |
2782 | clear_opt(sbi->s_mount_opt, NOBH); | |
2783 | } | |
2784 | } | |
2785 | /* | |
dab291af | 2786 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2787 | * so we can safely mount the rest of the filesystem now. |
2788 | */ | |
2789 | ||
1d1fe1ee DH |
2790 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2791 | if (IS_ERR(root)) { | |
617ba13b | 2792 | printk(KERN_ERR "EXT4-fs: get root inode failed\n"); |
1d1fe1ee | 2793 | ret = PTR_ERR(root); |
ac27a0ec DK |
2794 | goto failed_mount4; |
2795 | } | |
2796 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2797 | iput(root); |
617ba13b | 2798 | printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); |
ac27a0ec DK |
2799 | goto failed_mount4; |
2800 | } | |
1d1fe1ee DH |
2801 | sb->s_root = d_alloc_root(root); |
2802 | if (!sb->s_root) { | |
2803 | printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); | |
2804 | iput(root); | |
2805 | ret = -ENOMEM; | |
2806 | goto failed_mount4; | |
2807 | } | |
ac27a0ec | 2808 | |
2b2d6d01 | 2809 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2810 | |
2811 | /* determine the minimum size of new large inodes, if present */ | |
2812 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2813 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2814 | EXT4_GOOD_OLD_INODE_SIZE; | |
2815 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2816 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2817 | if (sbi->s_want_extra_isize < | |
2818 | le16_to_cpu(es->s_want_extra_isize)) | |
2819 | sbi->s_want_extra_isize = | |
2820 | le16_to_cpu(es->s_want_extra_isize); | |
2821 | if (sbi->s_want_extra_isize < | |
2822 | le16_to_cpu(es->s_min_extra_isize)) | |
2823 | sbi->s_want_extra_isize = | |
2824 | le16_to_cpu(es->s_min_extra_isize); | |
2825 | } | |
2826 | } | |
2827 | /* Check if enough inode space is available */ | |
2828 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2829 | sbi->s_inode_size) { | |
2830 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2831 | EXT4_GOOD_OLD_INODE_SIZE; | |
2832 | printk(KERN_INFO "EXT4-fs: required extra inode space not" | |
2833 | "available.\n"); | |
2834 | } | |
2835 | ||
c2774d84 AK |
2836 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
2837 | printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " | |
2838 | "requested data journaling mode\n"); | |
2839 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
2840 | } else if (test_opt(sb, DELALLOC)) | |
2841 | printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); | |
2842 | ||
6fd058f7 TT |
2843 | err = ext4_setup_system_zone(sb); |
2844 | if (err) { | |
2845 | printk(KERN_ERR "EXT4-fs: failed to initialize system " | |
2846 | "zone (%d)\n", err); | |
2847 | goto failed_mount4; | |
2848 | } | |
2849 | ||
c2774d84 AK |
2850 | ext4_ext_init(sb); |
2851 | err = ext4_mb_init(sb, needs_recovery); | |
2852 | if (err) { | |
2853 | printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", | |
2854 | err); | |
2855 | goto failed_mount4; | |
2856 | } | |
2857 | ||
3197ebdb TT |
2858 | sbi->s_kobj.kset = ext4_kset; |
2859 | init_completion(&sbi->s_kobj_unregister); | |
2860 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
2861 | "%s", sb->s_id); | |
2862 | if (err) { | |
2863 | ext4_mb_release(sb); | |
2864 | ext4_ext_release(sb); | |
2865 | goto failed_mount4; | |
2866 | }; | |
2867 | ||
617ba13b MC |
2868 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
2869 | ext4_orphan_cleanup(sb, es); | |
2870 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 2871 | if (needs_recovery) { |
2b2d6d01 | 2872 | printk(KERN_INFO "EXT4-fs: recovery complete.\n"); |
0390131b FM |
2873 | ext4_mark_recovery_complete(sb, es); |
2874 | } | |
2875 | if (EXT4_SB(sb)->s_journal) { | |
2876 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
2877 | descr = " journalled data mode"; | |
2878 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2879 | descr = " ordered data mode"; | |
2880 | else | |
2881 | descr = " writeback data mode"; | |
2882 | } else | |
2883 | descr = "out journal"; | |
2884 | ||
2885 | printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", | |
2886 | sb->s_id, descr); | |
ac27a0ec DK |
2887 | |
2888 | lock_kernel(); | |
2889 | return 0; | |
2890 | ||
617ba13b | 2891 | cantfind_ext4: |
ac27a0ec | 2892 | if (!silent) |
617ba13b | 2893 | printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", |
ac27a0ec DK |
2894 | sb->s_id); |
2895 | goto failed_mount; | |
2896 | ||
2897 | failed_mount4: | |
0390131b | 2898 | printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); |
6fd058f7 | 2899 | ext4_release_system_zone(sb); |
0390131b FM |
2900 | if (sbi->s_journal) { |
2901 | jbd2_journal_destroy(sbi->s_journal); | |
2902 | sbi->s_journal = NULL; | |
2903 | } | |
ac27a0ec | 2904 | failed_mount3: |
c5ca7c76 TT |
2905 | if (sbi->s_flex_groups) { |
2906 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
2907 | vfree(sbi->s_flex_groups); | |
2908 | else | |
2909 | kfree(sbi->s_flex_groups); | |
2910 | } | |
ac27a0ec DK |
2911 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
2912 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
2913 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 2914 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
2915 | failed_mount2: |
2916 | for (i = 0; i < db_count; i++) | |
2917 | brelse(sbi->s_group_desc[i]); | |
2918 | kfree(sbi->s_group_desc); | |
2919 | failed_mount: | |
240799cd | 2920 | if (sbi->s_proc) { |
9f6200bb | 2921 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 2922 | } |
ac27a0ec DK |
2923 | #ifdef CONFIG_QUOTA |
2924 | for (i = 0; i < MAXQUOTAS; i++) | |
2925 | kfree(sbi->s_qf_names[i]); | |
2926 | #endif | |
617ba13b | 2927 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
2928 | brelse(bh); |
2929 | out_fail: | |
2930 | sb->s_fs_info = NULL; | |
f6830165 | 2931 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2932 | kfree(sbi); |
2933 | lock_kernel(); | |
1d1fe1ee | 2934 | return ret; |
ac27a0ec DK |
2935 | } |
2936 | ||
2937 | /* | |
2938 | * Setup any per-fs journal parameters now. We'll do this both on | |
2939 | * initial mount, once the journal has been initialised but before we've | |
2940 | * done any recovery; and again on any subsequent remount. | |
2941 | */ | |
617ba13b | 2942 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 2943 | { |
617ba13b | 2944 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 2945 | |
30773840 TT |
2946 | journal->j_commit_interval = sbi->s_commit_interval; |
2947 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
2948 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
2949 | |
2950 | spin_lock(&journal->j_state_lock); | |
2951 | if (test_opt(sb, BARRIER)) | |
dab291af | 2952 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 2953 | else |
dab291af | 2954 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
2955 | if (test_opt(sb, DATA_ERR_ABORT)) |
2956 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
2957 | else | |
2958 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
2959 | spin_unlock(&journal->j_state_lock); |
2960 | } | |
2961 | ||
617ba13b | 2962 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
2963 | unsigned int journal_inum) |
2964 | { | |
2965 | struct inode *journal_inode; | |
2966 | journal_t *journal; | |
2967 | ||
0390131b FM |
2968 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
2969 | ||
ac27a0ec DK |
2970 | /* First, test for the existence of a valid inode on disk. Bad |
2971 | * things happen if we iget() an unused inode, as the subsequent | |
2972 | * iput() will try to delete it. */ | |
2973 | ||
1d1fe1ee DH |
2974 | journal_inode = ext4_iget(sb, journal_inum); |
2975 | if (IS_ERR(journal_inode)) { | |
617ba13b | 2976 | printk(KERN_ERR "EXT4-fs: no journal found.\n"); |
ac27a0ec DK |
2977 | return NULL; |
2978 | } | |
2979 | if (!journal_inode->i_nlink) { | |
2980 | make_bad_inode(journal_inode); | |
2981 | iput(journal_inode); | |
617ba13b | 2982 | printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); |
ac27a0ec DK |
2983 | return NULL; |
2984 | } | |
2985 | ||
e5f8eab8 | 2986 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 2987 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 2988 | if (!S_ISREG(journal_inode->i_mode)) { |
617ba13b | 2989 | printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); |
ac27a0ec DK |
2990 | iput(journal_inode); |
2991 | return NULL; | |
2992 | } | |
2993 | ||
dab291af | 2994 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 2995 | if (!journal) { |
617ba13b | 2996 | printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); |
ac27a0ec DK |
2997 | iput(journal_inode); |
2998 | return NULL; | |
2999 | } | |
3000 | journal->j_private = sb; | |
617ba13b | 3001 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3002 | return journal; |
3003 | } | |
3004 | ||
617ba13b | 3005 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3006 | dev_t j_dev) |
3007 | { | |
2b2d6d01 | 3008 | struct buffer_head *bh; |
ac27a0ec | 3009 | journal_t *journal; |
617ba13b MC |
3010 | ext4_fsblk_t start; |
3011 | ext4_fsblk_t len; | |
ac27a0ec | 3012 | int hblock, blocksize; |
617ba13b | 3013 | ext4_fsblk_t sb_block; |
ac27a0ec | 3014 | unsigned long offset; |
2b2d6d01 | 3015 | struct ext4_super_block *es; |
ac27a0ec DK |
3016 | struct block_device *bdev; |
3017 | ||
0390131b FM |
3018 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3019 | ||
617ba13b | 3020 | bdev = ext4_blkdev_get(j_dev); |
ac27a0ec DK |
3021 | if (bdev == NULL) |
3022 | return NULL; | |
3023 | ||
3024 | if (bd_claim(bdev, sb)) { | |
3025 | printk(KERN_ERR | |
abda1418 | 3026 | "EXT4-fs: failed to claim external journal device.\n"); |
9a1c3542 | 3027 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3028 | return NULL; |
3029 | } | |
3030 | ||
3031 | blocksize = sb->s_blocksize; | |
3032 | hblock = bdev_hardsect_size(bdev); | |
3033 | if (blocksize < hblock) { | |
3034 | printk(KERN_ERR | |
617ba13b | 3035 | "EXT4-fs: blocksize too small for journal device.\n"); |
ac27a0ec DK |
3036 | goto out_bdev; |
3037 | } | |
3038 | ||
617ba13b MC |
3039 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3040 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3041 | set_blocksize(bdev, blocksize); |
3042 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
617ba13b | 3043 | printk(KERN_ERR "EXT4-fs: couldn't read superblock of " |
ac27a0ec DK |
3044 | "external journal\n"); |
3045 | goto out_bdev; | |
3046 | } | |
3047 | ||
617ba13b MC |
3048 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3049 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3050 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b MC |
3051 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
3052 | printk(KERN_ERR "EXT4-fs: external journal has " | |
ac27a0ec DK |
3053 | "bad superblock\n"); |
3054 | brelse(bh); | |
3055 | goto out_bdev; | |
3056 | } | |
3057 | ||
617ba13b MC |
3058 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
3059 | printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); | |
ac27a0ec DK |
3060 | brelse(bh); |
3061 | goto out_bdev; | |
3062 | } | |
3063 | ||
bd81d8ee | 3064 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3065 | start = sb_block + 1; |
3066 | brelse(bh); /* we're done with the superblock */ | |
3067 | ||
dab291af | 3068 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3069 | start, len, blocksize); |
3070 | if (!journal) { | |
617ba13b | 3071 | printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); |
ac27a0ec DK |
3072 | goto out_bdev; |
3073 | } | |
3074 | journal->j_private = sb; | |
3075 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3076 | wait_on_buffer(journal->j_sb_buffer); | |
3077 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
617ba13b | 3078 | printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); |
ac27a0ec DK |
3079 | goto out_journal; |
3080 | } | |
3081 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
617ba13b | 3082 | printk(KERN_ERR "EXT4-fs: External journal has more than one " |
ac27a0ec DK |
3083 | "user (unsupported) - %d\n", |
3084 | be32_to_cpu(journal->j_superblock->s_nr_users)); | |
3085 | goto out_journal; | |
3086 | } | |
617ba13b MC |
3087 | EXT4_SB(sb)->journal_bdev = bdev; |
3088 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3089 | return journal; |
0b8e58a1 | 3090 | |
ac27a0ec | 3091 | out_journal: |
dab291af | 3092 | jbd2_journal_destroy(journal); |
ac27a0ec | 3093 | out_bdev: |
617ba13b | 3094 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3095 | return NULL; |
3096 | } | |
3097 | ||
617ba13b MC |
3098 | static int ext4_load_journal(struct super_block *sb, |
3099 | struct ext4_super_block *es, | |
ac27a0ec DK |
3100 | unsigned long journal_devnum) |
3101 | { | |
3102 | journal_t *journal; | |
3103 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3104 | dev_t journal_dev; | |
3105 | int err = 0; | |
3106 | int really_read_only; | |
3107 | ||
0390131b FM |
3108 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3109 | ||
ac27a0ec DK |
3110 | if (journal_devnum && |
3111 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
617ba13b | 3112 | printk(KERN_INFO "EXT4-fs: external journal device major/minor " |
ac27a0ec DK |
3113 | "numbers have changed\n"); |
3114 | journal_dev = new_decode_dev(journal_devnum); | |
3115 | } else | |
3116 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3117 | ||
3118 | really_read_only = bdev_read_only(sb->s_bdev); | |
3119 | ||
3120 | /* | |
3121 | * Are we loading a blank journal or performing recovery after a | |
3122 | * crash? For recovery, we need to check in advance whether we | |
3123 | * can get read-write access to the device. | |
3124 | */ | |
617ba13b | 3125 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3126 | if (sb->s_flags & MS_RDONLY) { |
617ba13b | 3127 | printk(KERN_INFO "EXT4-fs: INFO: recovery " |
ac27a0ec DK |
3128 | "required on readonly filesystem.\n"); |
3129 | if (really_read_only) { | |
617ba13b | 3130 | printk(KERN_ERR "EXT4-fs: write access " |
ac27a0ec DK |
3131 | "unavailable, cannot proceed.\n"); |
3132 | return -EROFS; | |
3133 | } | |
2b2d6d01 TT |
3134 | printk(KERN_INFO "EXT4-fs: write access will " |
3135 | "be enabled during recovery.\n"); | |
ac27a0ec DK |
3136 | } |
3137 | } | |
3138 | ||
3139 | if (journal_inum && journal_dev) { | |
617ba13b | 3140 | printk(KERN_ERR "EXT4-fs: filesystem has both journal " |
ac27a0ec DK |
3141 | "and inode journals!\n"); |
3142 | return -EINVAL; | |
3143 | } | |
3144 | ||
3145 | if (journal_inum) { | |
617ba13b | 3146 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3147 | return -EINVAL; |
3148 | } else { | |
617ba13b | 3149 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3150 | return -EINVAL; |
3151 | } | |
3152 | ||
4776004f TT |
3153 | if (journal->j_flags & JBD2_BARRIER) |
3154 | printk(KERN_INFO "EXT4-fs: barriers enabled\n"); | |
3155 | else | |
3156 | printk(KERN_INFO "EXT4-fs: barriers disabled\n"); | |
3157 | ||
ac27a0ec | 3158 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3159 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3160 | if (err) { |
617ba13b | 3161 | printk(KERN_ERR "EXT4-fs: error updating journal.\n"); |
dab291af | 3162 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3163 | return err; |
3164 | } | |
3165 | } | |
3166 | ||
617ba13b | 3167 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3168 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3169 | if (!err) |
dab291af | 3170 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3171 | |
3172 | if (err) { | |
617ba13b | 3173 | printk(KERN_ERR "EXT4-fs: error loading journal.\n"); |
dab291af | 3174 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3175 | return err; |
3176 | } | |
3177 | ||
617ba13b MC |
3178 | EXT4_SB(sb)->s_journal = journal; |
3179 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3180 | |
3181 | if (journal_devnum && | |
3182 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3183 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3184 | |
3185 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3186 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3187 | } |
3188 | ||
3189 | return 0; | |
3190 | } | |
3191 | ||
e2d67052 | 3192 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3193 | { |
e2d67052 | 3194 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3195 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3196 | int error = 0; |
ac27a0ec DK |
3197 | |
3198 | if (!sbh) | |
c4be0c1d | 3199 | return error; |
914258bf TT |
3200 | if (buffer_write_io_error(sbh)) { |
3201 | /* | |
3202 | * Oh, dear. A previous attempt to write the | |
3203 | * superblock failed. This could happen because the | |
3204 | * USB device was yanked out. Or it could happen to | |
3205 | * be a transient write error and maybe the block will | |
3206 | * be remapped. Nothing we can do but to retry the | |
3207 | * write and hope for the best. | |
3208 | */ | |
abda1418 | 3209 | printk(KERN_ERR "EXT4-fs: previous I/O error to " |
914258bf TT |
3210 | "superblock detected for %s.\n", sb->s_id); |
3211 | clear_buffer_write_io_error(sbh); | |
3212 | set_buffer_uptodate(sbh); | |
3213 | } | |
ac27a0ec | 3214 | es->s_wtime = cpu_to_le32(get_seconds()); |
afc32f7e TT |
3215 | es->s_kbytes_written = |
3216 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
3217 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
3218 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3219 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3220 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3221 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3222 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3223 | sb->s_dirt = 0; |
ac27a0ec DK |
3224 | BUFFER_TRACE(sbh, "marking dirty"); |
3225 | mark_buffer_dirty(sbh); | |
914258bf | 3226 | if (sync) { |
c4be0c1d TS |
3227 | error = sync_dirty_buffer(sbh); |
3228 | if (error) | |
3229 | return error; | |
3230 | ||
3231 | error = buffer_write_io_error(sbh); | |
3232 | if (error) { | |
abda1418 | 3233 | printk(KERN_ERR "EXT4-fs: I/O error while writing " |
914258bf TT |
3234 | "superblock for %s.\n", sb->s_id); |
3235 | clear_buffer_write_io_error(sbh); | |
3236 | set_buffer_uptodate(sbh); | |
3237 | } | |
3238 | } | |
c4be0c1d | 3239 | return error; |
ac27a0ec DK |
3240 | } |
3241 | ||
ac27a0ec DK |
3242 | /* |
3243 | * Have we just finished recovery? If so, and if we are mounting (or | |
3244 | * remounting) the filesystem readonly, then we will end up with a | |
3245 | * consistent fs on disk. Record that fact. | |
3246 | */ | |
2b2d6d01 TT |
3247 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3248 | struct ext4_super_block *es) | |
ac27a0ec | 3249 | { |
617ba13b | 3250 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3251 | |
0390131b FM |
3252 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3253 | BUG_ON(journal != NULL); | |
3254 | return; | |
3255 | } | |
dab291af | 3256 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3257 | if (jbd2_journal_flush(journal) < 0) |
3258 | goto out; | |
3259 | ||
617ba13b | 3260 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3261 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3262 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 3263 | ext4_commit_super(sb, 1); |
ac27a0ec | 3264 | } |
7ffe1ea8 HK |
3265 | |
3266 | out: | |
dab291af | 3267 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3268 | } |
3269 | ||
3270 | /* | |
3271 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3272 | * has recorded an error from a previous lifetime, move that error to the | |
3273 | * main filesystem now. | |
3274 | */ | |
2b2d6d01 TT |
3275 | static void ext4_clear_journal_err(struct super_block *sb, |
3276 | struct ext4_super_block *es) | |
ac27a0ec DK |
3277 | { |
3278 | journal_t *journal; | |
3279 | int j_errno; | |
3280 | const char *errstr; | |
3281 | ||
0390131b FM |
3282 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3283 | ||
617ba13b | 3284 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3285 | |
3286 | /* | |
3287 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3288 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3289 | */ |
3290 | ||
dab291af | 3291 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3292 | if (j_errno) { |
3293 | char nbuf[16]; | |
3294 | ||
617ba13b | 3295 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
46e665e9 | 3296 | ext4_warning(sb, __func__, "Filesystem error recorded " |
ac27a0ec | 3297 | "from previous mount: %s", errstr); |
46e665e9 | 3298 | ext4_warning(sb, __func__, "Marking fs in need of " |
ac27a0ec DK |
3299 | "filesystem check."); |
3300 | ||
617ba13b MC |
3301 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3302 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 3303 | ext4_commit_super(sb, 1); |
ac27a0ec | 3304 | |
dab291af | 3305 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3306 | } |
3307 | } | |
3308 | ||
3309 | /* | |
3310 | * Force the running and committing transactions to commit, | |
3311 | * and wait on the commit. | |
3312 | */ | |
617ba13b | 3313 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3314 | { |
3315 | journal_t *journal; | |
0390131b | 3316 | int ret = 0; |
ac27a0ec DK |
3317 | |
3318 | if (sb->s_flags & MS_RDONLY) | |
3319 | return 0; | |
3320 | ||
617ba13b | 3321 | journal = EXT4_SB(sb)->s_journal; |
7234ab2a | 3322 | if (journal) |
0390131b | 3323 | ret = ext4_journal_force_commit(journal); |
0390131b | 3324 | |
ac27a0ec DK |
3325 | return ret; |
3326 | } | |
3327 | ||
2b2d6d01 | 3328 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3329 | { |
9ca92389 | 3330 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3331 | } |
3332 | ||
617ba13b | 3333 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3334 | { |
14ce0cb4 | 3335 | int ret = 0; |
9eddacf9 | 3336 | tid_t target; |
ac27a0ec | 3337 | |
ede86cc4 | 3338 | trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); |
9ca92389 TT |
3339 | if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { |
3340 | if (wait) | |
3341 | jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); | |
0390131b | 3342 | } |
14ce0cb4 | 3343 | return ret; |
ac27a0ec DK |
3344 | } |
3345 | ||
3346 | /* | |
3347 | * LVM calls this function before a (read-only) snapshot is created. This | |
3348 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3349 | */ | |
c4be0c1d | 3350 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3351 | { |
c4be0c1d TS |
3352 | int error = 0; |
3353 | journal_t *journal; | |
ac27a0ec | 3354 | |
9ca92389 TT |
3355 | if (sb->s_flags & MS_RDONLY) |
3356 | return 0; | |
ac27a0ec | 3357 | |
9ca92389 | 3358 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 3359 | |
9ca92389 TT |
3360 | /* Now we set up the journal barrier. */ |
3361 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 3362 | |
9ca92389 TT |
3363 | /* |
3364 | * Don't clear the needs_recovery flag if we failed to flush | |
3365 | * the journal. | |
3366 | */ | |
3367 | error = jbd2_journal_flush(journal); | |
3368 | if (error < 0) { | |
3369 | out: | |
3370 | jbd2_journal_unlock_updates(journal); | |
3371 | return error; | |
ac27a0ec | 3372 | } |
9ca92389 TT |
3373 | |
3374 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
3375 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3376 | error = ext4_commit_super(sb, 1); | |
3377 | if (error) | |
3378 | goto out; | |
c4be0c1d | 3379 | return 0; |
ac27a0ec DK |
3380 | } |
3381 | ||
3382 | /* | |
3383 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3384 | * flag here, even though the filesystem is not technically dirty yet. | |
3385 | */ | |
c4be0c1d | 3386 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3387 | { |
9ca92389 TT |
3388 | if (sb->s_flags & MS_RDONLY) |
3389 | return 0; | |
3390 | ||
3391 | lock_super(sb); | |
3392 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
3393 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3394 | ext4_commit_super(sb, 1); | |
3395 | unlock_super(sb); | |
3396 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
c4be0c1d | 3397 | return 0; |
ac27a0ec DK |
3398 | } |
3399 | ||
2b2d6d01 | 3400 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3401 | { |
2b2d6d01 | 3402 | struct ext4_super_block *es; |
617ba13b MC |
3403 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3404 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3405 | unsigned long old_sb_flags; |
617ba13b | 3406 | struct ext4_mount_options old_opts; |
8a266467 | 3407 | ext4_group_t g; |
b3881f74 | 3408 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3409 | int err; |
3410 | #ifdef CONFIG_QUOTA | |
3411 | int i; | |
3412 | #endif | |
3413 | ||
3414 | /* Store the original options */ | |
3415 | old_sb_flags = sb->s_flags; | |
3416 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3417 | old_opts.s_resuid = sbi->s_resuid; | |
3418 | old_opts.s_resgid = sbi->s_resgid; | |
3419 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3420 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3421 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3422 | #ifdef CONFIG_QUOTA |
3423 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3424 | for (i = 0; i < MAXQUOTAS; i++) | |
3425 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3426 | #endif | |
b3881f74 TT |
3427 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3428 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3429 | |
3430 | /* | |
3431 | * Allow the "check" option to be passed as a remount option. | |
3432 | */ | |
b3881f74 TT |
3433 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3434 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3435 | err = -EINVAL; |
3436 | goto restore_opts; | |
3437 | } | |
3438 | ||
617ba13b | 3439 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) |
46e665e9 | 3440 | ext4_abort(sb, __func__, "Abort forced by user"); |
ac27a0ec DK |
3441 | |
3442 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
617ba13b | 3443 | ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3444 | |
3445 | es = sbi->s_es; | |
3446 | ||
b3881f74 | 3447 | if (sbi->s_journal) { |
0390131b | 3448 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3449 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3450 | } | |
ac27a0ec DK |
3451 | |
3452 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3453 | n_blocks_count > ext4_blocks_count(es)) { |
617ba13b | 3454 | if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { |
ac27a0ec DK |
3455 | err = -EROFS; |
3456 | goto restore_opts; | |
3457 | } | |
3458 | ||
3459 | if (*flags & MS_RDONLY) { | |
3460 | /* | |
3461 | * First of all, the unconditional stuff we have to do | |
3462 | * to disable replay of the journal when we next remount | |
3463 | */ | |
3464 | sb->s_flags |= MS_RDONLY; | |
3465 | ||
3466 | /* | |
3467 | * OK, test if we are remounting a valid rw partition | |
3468 | * readonly, and if so set the rdonly flag and then | |
3469 | * mark the partition as valid again. | |
3470 | */ | |
617ba13b MC |
3471 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3472 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3473 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3474 | ||
a63c9eb2 | 3475 | if (sbi->s_journal) |
0390131b | 3476 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 3477 | } else { |
3a06d778 | 3478 | int ret; |
617ba13b MC |
3479 | if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3480 | ~EXT4_FEATURE_RO_COMPAT_SUPP))) { | |
3481 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
ac27a0ec | 3482 | "remount RDWR because of unsupported " |
3a06d778 AK |
3483 | "optional features (%x).\n", sb->s_id, |
3484 | (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & | |
3485 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
ac27a0ec DK |
3486 | err = -EROFS; |
3487 | goto restore_opts; | |
3488 | } | |
ead6596b | 3489 | |
8a266467 TT |
3490 | /* |
3491 | * Make sure the group descriptor checksums | |
0b8e58a1 | 3492 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
3493 | */ |
3494 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3495 | struct ext4_group_desc *gdp = | |
3496 | ext4_get_group_desc(sb, g, NULL); | |
3497 | ||
3498 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
3499 | printk(KERN_ERR | |
3500 | "EXT4-fs: ext4_remount: " | |
a9df9a49 | 3501 | "Checksum for group %u failed (%u!=%u)\n", |
8a266467 TT |
3502 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3503 | le16_to_cpu(gdp->bg_checksum)); | |
3504 | err = -EINVAL; | |
3505 | goto restore_opts; | |
3506 | } | |
3507 | } | |
3508 | ||
ead6596b ES |
3509 | /* |
3510 | * If we have an unprocessed orphan list hanging | |
3511 | * around from a previously readonly bdev mount, | |
3512 | * require a full umount/remount for now. | |
3513 | */ | |
3514 | if (es->s_last_orphan) { | |
3515 | printk(KERN_WARNING "EXT4-fs: %s: couldn't " | |
3516 | "remount RDWR because of unprocessed " | |
3517 | "orphan inode list. Please " | |
3518 | "umount/remount instead.\n", | |
3519 | sb->s_id); | |
3520 | err = -EINVAL; | |
3521 | goto restore_opts; | |
3522 | } | |
3523 | ||
ac27a0ec DK |
3524 | /* |
3525 | * Mounting a RDONLY partition read-write, so reread | |
3526 | * and store the current valid flag. (It may have | |
3527 | * been changed by e2fsck since we originally mounted | |
3528 | * the partition.) | |
3529 | */ | |
0390131b FM |
3530 | if (sbi->s_journal) |
3531 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3532 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3533 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3534 | goto restore_opts; |
2b2d6d01 | 3535 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec DK |
3536 | sb->s_flags &= ~MS_RDONLY; |
3537 | } | |
3538 | } | |
6fd058f7 | 3539 | ext4_setup_system_zone(sb); |
0390131b | 3540 | if (sbi->s_journal == NULL) |
e2d67052 | 3541 | ext4_commit_super(sb, 1); |
0390131b | 3542 | |
ac27a0ec DK |
3543 | #ifdef CONFIG_QUOTA |
3544 | /* Release old quota file names */ | |
3545 | for (i = 0; i < MAXQUOTAS; i++) | |
3546 | if (old_opts.s_qf_names[i] && | |
3547 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3548 | kfree(old_opts.s_qf_names[i]); | |
3549 | #endif | |
3550 | return 0; | |
0b8e58a1 | 3551 | |
ac27a0ec DK |
3552 | restore_opts: |
3553 | sb->s_flags = old_sb_flags; | |
3554 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3555 | sbi->s_resuid = old_opts.s_resuid; | |
3556 | sbi->s_resgid = old_opts.s_resgid; | |
3557 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3558 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3559 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3560 | #ifdef CONFIG_QUOTA |
3561 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3562 | for (i = 0; i < MAXQUOTAS; i++) { | |
3563 | if (sbi->s_qf_names[i] && | |
3564 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3565 | kfree(sbi->s_qf_names[i]); | |
3566 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3567 | } | |
3568 | #endif | |
3569 | return err; | |
3570 | } | |
3571 | ||
2b2d6d01 | 3572 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3573 | { |
3574 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3575 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3576 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3577 | u64 fsid; |
ac27a0ec | 3578 | |
5e70030d BP |
3579 | if (test_opt(sb, MINIX_DF)) { |
3580 | sbi->s_overhead_last = 0; | |
6bc9feff | 3581 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 3582 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 3583 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3584 | |
3585 | /* | |
5e70030d BP |
3586 | * Compute the overhead (FS structures). This is constant |
3587 | * for a given filesystem unless the number of block groups | |
3588 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3589 | */ |
3590 | ||
3591 | /* | |
3592 | * All of the blocks before first_data_block are | |
3593 | * overhead | |
3594 | */ | |
3595 | overhead = le32_to_cpu(es->s_first_data_block); | |
3596 | ||
3597 | /* | |
3598 | * Add the overhead attributed to the superblock and | |
3599 | * block group descriptors. If the sparse superblocks | |
3600 | * feature is turned on, then not all groups have this. | |
3601 | */ | |
3602 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3603 | overhead += ext4_bg_has_super(sb, i) + |
3604 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3605 | cond_resched(); |
3606 | } | |
3607 | ||
3608 | /* | |
3609 | * Every block group has an inode bitmap, a block | |
3610 | * bitmap, and an inode table. | |
3611 | */ | |
5e70030d BP |
3612 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3613 | sbi->s_overhead_last = overhead; | |
3614 | smp_wmb(); | |
6bc9feff | 3615 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3616 | } |
3617 | ||
617ba13b | 3618 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3619 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3620 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3621 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3622 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
308ba3ec | 3623 | ext4_free_blocks_count_set(es, buf->f_bfree); |
bd81d8ee LV |
3624 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3625 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3626 | buf->f_bavail = 0; |
3627 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3628 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
5e70030d | 3629 | es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); |
617ba13b | 3630 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3631 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3632 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3633 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3634 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 3635 | |
ac27a0ec DK |
3636 | return 0; |
3637 | } | |
3638 | ||
0b8e58a1 AD |
3639 | /* Helper function for writing quotas on sync - we need to start transaction |
3640 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 3641 | * Process 1 Process 2 |
617ba13b | 3642 | * ext4_create() quota_sync() |
a269eb18 JK |
3643 | * jbd2_journal_start() write_dquot() |
3644 | * vfs_dq_init() down(dqio_mutex) | |
dab291af | 3645 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3646 | * |
3647 | */ | |
3648 | ||
3649 | #ifdef CONFIG_QUOTA | |
3650 | ||
3651 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3652 | { | |
3653 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3654 | } | |
3655 | ||
617ba13b | 3656 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3657 | { |
3658 | int ret, err; | |
3659 | handle_t *handle; | |
3660 | struct inode *inode; | |
3661 | ||
3662 | inode = dquot_to_inode(dquot); | |
617ba13b | 3663 | handle = ext4_journal_start(inode, |
0b8e58a1 | 3664 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3665 | if (IS_ERR(handle)) |
3666 | return PTR_ERR(handle); | |
3667 | ret = dquot_commit(dquot); | |
617ba13b | 3668 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3669 | if (!ret) |
3670 | ret = err; | |
3671 | return ret; | |
3672 | } | |
3673 | ||
617ba13b | 3674 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3675 | { |
3676 | int ret, err; | |
3677 | handle_t *handle; | |
3678 | ||
617ba13b | 3679 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3680 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3681 | if (IS_ERR(handle)) |
3682 | return PTR_ERR(handle); | |
3683 | ret = dquot_acquire(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_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3691 | { |
3692 | int ret, err; | |
3693 | handle_t *handle; | |
3694 | ||
617ba13b | 3695 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3696 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
3697 | if (IS_ERR(handle)) { |
3698 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3699 | dquot_release(dquot); | |
ac27a0ec | 3700 | return PTR_ERR(handle); |
9c3013e9 | 3701 | } |
ac27a0ec | 3702 | ret = dquot_release(dquot); |
617ba13b | 3703 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3704 | if (!ret) |
3705 | ret = err; | |
3706 | return ret; | |
3707 | } | |
3708 | ||
617ba13b | 3709 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3710 | { |
2c8be6b2 | 3711 | /* Are we journaling quotas? */ |
617ba13b MC |
3712 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3713 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3714 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3715 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3716 | } else { |
3717 | return dquot_mark_dquot_dirty(dquot); | |
3718 | } | |
3719 | } | |
3720 | ||
617ba13b | 3721 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3722 | { |
3723 | int ret, err; | |
3724 | handle_t *handle; | |
3725 | ||
3726 | /* Data block + inode block */ | |
617ba13b | 3727 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3728 | if (IS_ERR(handle)) |
3729 | return PTR_ERR(handle); | |
3730 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3731 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3732 | if (!ret) |
3733 | ret = err; | |
3734 | return ret; | |
3735 | } | |
3736 | ||
3737 | /* | |
3738 | * Turn on quotas during mount time - we need to find | |
3739 | * the quota file and such... | |
3740 | */ | |
617ba13b | 3741 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3742 | { |
617ba13b | 3743 | return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
0b8e58a1 | 3744 | EXT4_SB(sb)->s_jquota_fmt, type); |
ac27a0ec DK |
3745 | } |
3746 | ||
3747 | /* | |
3748 | * Standard function to be called on quota_on | |
3749 | */ | |
617ba13b | 3750 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8264613d | 3751 | char *name, int remount) |
ac27a0ec DK |
3752 | { |
3753 | int err; | |
8264613d | 3754 | struct path path; |
ac27a0ec DK |
3755 | |
3756 | if (!test_opt(sb, QUOTA)) | |
3757 | return -EINVAL; | |
8264613d | 3758 | /* When remounting, no checks are needed and in fact, name is NULL */ |
0623543b | 3759 | if (remount) |
8264613d | 3760 | return vfs_quota_on(sb, type, format_id, name, remount); |
0623543b | 3761 | |
8264613d | 3762 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3763 | if (err) |
3764 | return err; | |
0623543b | 3765 | |
ac27a0ec | 3766 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3767 | if (path.mnt->mnt_sb != sb) { |
3768 | path_put(&path); | |
ac27a0ec DK |
3769 | return -EXDEV; |
3770 | } | |
0623543b JK |
3771 | /* Journaling quota? */ |
3772 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3773 | /* Quotafile not in fs root? */ |
8264613d | 3774 | if (path.dentry->d_parent != sb->s_root) |
0623543b JK |
3775 | printk(KERN_WARNING |
3776 | "EXT4-fs: Quota file not on filesystem root. " | |
3777 | "Journaled quota will not work.\n"); | |
2b2d6d01 | 3778 | } |
0623543b JK |
3779 | |
3780 | /* | |
3781 | * When we journal data on quota file, we have to flush journal to see | |
3782 | * all updates to the file when we bypass pagecache... | |
3783 | */ | |
0390131b FM |
3784 | if (EXT4_SB(sb)->s_journal && |
3785 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3786 | /* |
3787 | * We don't need to lock updates but journal_flush() could | |
3788 | * otherwise be livelocked... | |
3789 | */ | |
3790 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3791 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3792 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3793 | if (err) { |
8264613d | 3794 | path_put(&path); |
7ffe1ea8 HK |
3795 | return err; |
3796 | } | |
0623543b JK |
3797 | } |
3798 | ||
8264613d AV |
3799 | err = vfs_quota_on_path(sb, type, format_id, &path); |
3800 | path_put(&path); | |
77e69dac | 3801 | return err; |
ac27a0ec DK |
3802 | } |
3803 | ||
3804 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3805 | * acquiring the locks... As quota files are never truncated and quota code | |
3806 | * itself serializes the operations (and noone else should touch the files) | |
3807 | * we don't have to be afraid of races */ | |
617ba13b | 3808 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3809 | size_t len, loff_t off) |
3810 | { | |
3811 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3812 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3813 | int err = 0; |
3814 | int offset = off & (sb->s_blocksize - 1); | |
3815 | int tocopy; | |
3816 | size_t toread; | |
3817 | struct buffer_head *bh; | |
3818 | loff_t i_size = i_size_read(inode); | |
3819 | ||
3820 | if (off > i_size) | |
3821 | return 0; | |
3822 | if (off+len > i_size) | |
3823 | len = i_size-off; | |
3824 | toread = len; | |
3825 | while (toread > 0) { | |
3826 | tocopy = sb->s_blocksize - offset < toread ? | |
3827 | sb->s_blocksize - offset : toread; | |
617ba13b | 3828 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
3829 | if (err) |
3830 | return err; | |
3831 | if (!bh) /* A hole? */ | |
3832 | memset(data, 0, tocopy); | |
3833 | else | |
3834 | memcpy(data, bh->b_data+offset, tocopy); | |
3835 | brelse(bh); | |
3836 | offset = 0; | |
3837 | toread -= tocopy; | |
3838 | data += tocopy; | |
3839 | blk++; | |
3840 | } | |
3841 | return len; | |
3842 | } | |
3843 | ||
3844 | /* Write to quotafile (we know the transaction is already started and has | |
3845 | * enough credits) */ | |
617ba13b | 3846 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
3847 | const char *data, size_t len, loff_t off) |
3848 | { | |
3849 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3850 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3851 | int err = 0; |
3852 | int offset = off & (sb->s_blocksize - 1); | |
3853 | int tocopy; | |
617ba13b | 3854 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
3855 | size_t towrite = len; |
3856 | struct buffer_head *bh; | |
3857 | handle_t *handle = journal_current_handle(); | |
3858 | ||
0390131b | 3859 | if (EXT4_SB(sb)->s_journal && !handle) { |
e5f8eab8 | 3860 | printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" |
9c3013e9 JK |
3861 | " cancelled because transaction is not started.\n", |
3862 | (unsigned long long)off, (unsigned long long)len); | |
3863 | return -EIO; | |
3864 | } | |
ac27a0ec DK |
3865 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
3866 | while (towrite > 0) { | |
3867 | tocopy = sb->s_blocksize - offset < towrite ? | |
3868 | sb->s_blocksize - offset : towrite; | |
617ba13b | 3869 | bh = ext4_bread(handle, inode, blk, 1, &err); |
ac27a0ec DK |
3870 | if (!bh) |
3871 | goto out; | |
3872 | if (journal_quota) { | |
617ba13b | 3873 | err = ext4_journal_get_write_access(handle, bh); |
ac27a0ec DK |
3874 | if (err) { |
3875 | brelse(bh); | |
3876 | goto out; | |
3877 | } | |
3878 | } | |
3879 | lock_buffer(bh); | |
3880 | memcpy(bh->b_data+offset, data, tocopy); | |
3881 | flush_dcache_page(bh->b_page); | |
3882 | unlock_buffer(bh); | |
3883 | if (journal_quota) | |
0390131b | 3884 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
ac27a0ec DK |
3885 | else { |
3886 | /* Always do at least ordered writes for quotas */ | |
678aaf48 | 3887 | err = ext4_jbd2_file_inode(handle, inode); |
ac27a0ec DK |
3888 | mark_buffer_dirty(bh); |
3889 | } | |
3890 | brelse(bh); | |
3891 | if (err) | |
3892 | goto out; | |
3893 | offset = 0; | |
3894 | towrite -= tocopy; | |
3895 | data += tocopy; | |
3896 | blk++; | |
3897 | } | |
3898 | out: | |
4d04e4fb JK |
3899 | if (len == towrite) { |
3900 | mutex_unlock(&inode->i_mutex); | |
ac27a0ec | 3901 | return err; |
4d04e4fb | 3902 | } |
ac27a0ec DK |
3903 | if (inode->i_size < off+len-towrite) { |
3904 | i_size_write(inode, off+len-towrite); | |
617ba13b | 3905 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 3906 | } |
ac27a0ec | 3907 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 3908 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
3909 | mutex_unlock(&inode->i_mutex); |
3910 | return len - towrite; | |
3911 | } | |
3912 | ||
3913 | #endif | |
3914 | ||
0b8e58a1 AD |
3915 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
3916 | const char *dev_name, void *data, struct vfsmount *mnt) | |
ac27a0ec | 3917 | { |
0b8e58a1 | 3918 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
ac27a0ec DK |
3919 | } |
3920 | ||
03010a33 TT |
3921 | static struct file_system_type ext4_fs_type = { |
3922 | .owner = THIS_MODULE, | |
3923 | .name = "ext4", | |
3924 | .get_sb = ext4_get_sb, | |
3925 | .kill_sb = kill_block_super, | |
3926 | .fs_flags = FS_REQUIRES_DEV, | |
3927 | }; | |
3928 | ||
3929 | #ifdef CONFIG_EXT4DEV_COMPAT | |
0b8e58a1 AD |
3930 | static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, |
3931 | const char *dev_name, void *data,struct vfsmount *mnt) | |
03010a33 TT |
3932 | { |
3933 | printk(KERN_WARNING "EXT4-fs: Update your userspace programs " | |
3934 | "to mount using ext4\n"); | |
3935 | printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " | |
3936 | "will go away by 2.6.31\n"); | |
0b8e58a1 | 3937 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
03010a33 TT |
3938 | } |
3939 | ||
617ba13b | 3940 | static struct file_system_type ext4dev_fs_type = { |
ac27a0ec | 3941 | .owner = THIS_MODULE, |
617ba13b | 3942 | .name = "ext4dev", |
03010a33 | 3943 | .get_sb = ext4dev_get_sb, |
ac27a0ec DK |
3944 | .kill_sb = kill_block_super, |
3945 | .fs_flags = FS_REQUIRES_DEV, | |
3946 | }; | |
03010a33 TT |
3947 | MODULE_ALIAS("ext4dev"); |
3948 | #endif | |
ac27a0ec | 3949 | |
617ba13b | 3950 | static int __init init_ext4_fs(void) |
ac27a0ec | 3951 | { |
c9de560d AT |
3952 | int err; |
3953 | ||
6fd058f7 TT |
3954 | err = init_ext4_system_zone(); |
3955 | if (err) | |
3956 | return err; | |
3197ebdb TT |
3957 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
3958 | if (!ext4_kset) | |
6fd058f7 | 3959 | goto out4; |
9f6200bb | 3960 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 3961 | err = init_ext4_mballoc(); |
ac27a0ec | 3962 | if (err) |
6fd058f7 | 3963 | goto out3; |
c9de560d AT |
3964 | |
3965 | err = init_ext4_xattr(); | |
3966 | if (err) | |
3967 | goto out2; | |
ac27a0ec DK |
3968 | err = init_inodecache(); |
3969 | if (err) | |
3970 | goto out1; | |
03010a33 | 3971 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
3972 | if (err) |
3973 | goto out; | |
03010a33 TT |
3974 | #ifdef CONFIG_EXT4DEV_COMPAT |
3975 | err = register_filesystem(&ext4dev_fs_type); | |
3976 | if (err) { | |
3977 | unregister_filesystem(&ext4_fs_type); | |
3978 | goto out; | |
3979 | } | |
3980 | #endif | |
ac27a0ec DK |
3981 | return 0; |
3982 | out: | |
3983 | destroy_inodecache(); | |
3984 | out1: | |
617ba13b | 3985 | exit_ext4_xattr(); |
c9de560d AT |
3986 | out2: |
3987 | exit_ext4_mballoc(); | |
6fd058f7 TT |
3988 | out3: |
3989 | remove_proc_entry("fs/ext4", NULL); | |
3990 | kset_unregister(ext4_kset); | |
3991 | out4: | |
3992 | exit_ext4_system_zone(); | |
ac27a0ec DK |
3993 | return err; |
3994 | } | |
3995 | ||
617ba13b | 3996 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 3997 | { |
03010a33 TT |
3998 | unregister_filesystem(&ext4_fs_type); |
3999 | #ifdef CONFIG_EXT4DEV_COMPAT | |
617ba13b | 4000 | unregister_filesystem(&ext4dev_fs_type); |
03010a33 | 4001 | #endif |
ac27a0ec | 4002 | destroy_inodecache(); |
617ba13b | 4003 | exit_ext4_xattr(); |
c9de560d | 4004 | exit_ext4_mballoc(); |
9f6200bb | 4005 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4006 | kset_unregister(ext4_kset); |
6fd058f7 | 4007 | exit_ext4_system_zone(); |
ac27a0ec DK |
4008 | } |
4009 | ||
4010 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4011 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4012 | MODULE_LICENSE("GPL"); |
617ba13b MC |
4013 | module_init(init_ext4_fs) |
4014 | module_exit(exit_ext4_fs) |