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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> |
1330593e | 40 | #include <linux/log2.h> |
717d50e4 | 41 | #include <linux/crc16.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
3dcf5451 CH |
44 | #include "ext4.h" |
45 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
46 | #include "xattr.h" |
47 | #include "acl.h" | |
3661d286 | 48 | #include "mballoc.h" |
ac27a0ec | 49 | |
9bffad1e TT |
50 | #define CREATE_TRACE_POINTS |
51 | #include <trace/events/ext4.h> | |
52 | ||
9f6200bb | 53 | struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 54 | static struct kset *ext4_kset; |
9f6200bb | 55 | |
617ba13b | 56 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 57 | unsigned long journal_devnum); |
e2d67052 | 58 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
59 | static void ext4_mark_recovery_complete(struct super_block *sb, |
60 | struct ext4_super_block *es); | |
61 | static void ext4_clear_journal_err(struct super_block *sb, | |
62 | struct ext4_super_block *es); | |
617ba13b | 63 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 64 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 65 | char nbuf[16]); |
2b2d6d01 TT |
66 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
67 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 68 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 69 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 70 | static int ext4_freeze(struct super_block *sb); |
ba69f9ab JK |
71 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
72 | const char *dev_name, void *data, struct vfsmount *mnt); | |
ac27a0ec | 73 | |
ba69f9ab JK |
74 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
75 | static struct file_system_type ext3_fs_type = { | |
76 | .owner = THIS_MODULE, | |
77 | .name = "ext3", | |
78 | .get_sb = ext4_get_sb, | |
79 | .kill_sb = kill_block_super, | |
80 | .fs_flags = FS_REQUIRES_DEV, | |
81 | }; | |
82 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
83 | #else | |
84 | #define IS_EXT3_SB(sb) (0) | |
85 | #endif | |
bd81d8ee | 86 | |
8fadc143 AR |
87 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
88 | struct ext4_group_desc *bg) | |
bd81d8ee | 89 | { |
3a14589c | 90 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 91 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 92 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
93 | } |
94 | ||
8fadc143 AR |
95 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
96 | struct ext4_group_desc *bg) | |
bd81d8ee | 97 | { |
5272f837 | 98 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 99 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 100 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
101 | } |
102 | ||
8fadc143 AR |
103 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
104 | struct ext4_group_desc *bg) | |
bd81d8ee | 105 | { |
5272f837 | 106 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 107 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 108 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
109 | } |
110 | ||
560671a0 AK |
111 | __u32 ext4_free_blks_count(struct super_block *sb, |
112 | struct ext4_group_desc *bg) | |
113 | { | |
114 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
115 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 116 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
117 | } |
118 | ||
119 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
120 | struct ext4_group_desc *bg) | |
121 | { | |
122 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
123 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 124 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
125 | } |
126 | ||
127 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
128 | struct ext4_group_desc *bg) | |
129 | { | |
130 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
131 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 132 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
133 | } |
134 | ||
135 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
136 | struct ext4_group_desc *bg) | |
137 | { | |
138 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
139 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 140 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
141 | } |
142 | ||
8fadc143 AR |
143 | void ext4_block_bitmap_set(struct super_block *sb, |
144 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 145 | { |
3a14589c | 146 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
147 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
148 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
149 | } |
150 | ||
8fadc143 AR |
151 | void ext4_inode_bitmap_set(struct super_block *sb, |
152 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 153 | { |
5272f837 | 154 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
155 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
156 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
157 | } |
158 | ||
8fadc143 AR |
159 | void ext4_inode_table_set(struct super_block *sb, |
160 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 161 | { |
5272f837 | 162 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
163 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
164 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
165 | } |
166 | ||
560671a0 AK |
167 | void ext4_free_blks_set(struct super_block *sb, |
168 | struct ext4_group_desc *bg, __u32 count) | |
169 | { | |
170 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
171 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
172 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
173 | } | |
174 | ||
175 | void ext4_free_inodes_set(struct super_block *sb, | |
176 | struct ext4_group_desc *bg, __u32 count) | |
177 | { | |
178 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
179 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
180 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
181 | } | |
182 | ||
183 | void ext4_used_dirs_set(struct super_block *sb, | |
184 | struct ext4_group_desc *bg, __u32 count) | |
185 | { | |
186 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
187 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
188 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
189 | } | |
190 | ||
191 | void ext4_itable_unused_set(struct super_block *sb, | |
192 | struct ext4_group_desc *bg, __u32 count) | |
193 | { | |
194 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
195 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
196 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
197 | } | |
198 | ||
d3d1faf6 CW |
199 | |
200 | /* Just increment the non-pointer handle value */ | |
201 | static handle_t *ext4_get_nojournal(void) | |
202 | { | |
203 | handle_t *handle = current->journal_info; | |
204 | unsigned long ref_cnt = (unsigned long)handle; | |
205 | ||
206 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
207 | ||
208 | ref_cnt++; | |
209 | handle = (handle_t *)ref_cnt; | |
210 | ||
211 | current->journal_info = handle; | |
212 | return handle; | |
213 | } | |
214 | ||
215 | ||
216 | /* Decrement the non-pointer handle value */ | |
217 | static void ext4_put_nojournal(handle_t *handle) | |
218 | { | |
219 | unsigned long ref_cnt = (unsigned long)handle; | |
220 | ||
221 | BUG_ON(ref_cnt == 0); | |
222 | ||
223 | ref_cnt--; | |
224 | handle = (handle_t *)ref_cnt; | |
225 | ||
226 | current->journal_info = handle; | |
227 | } | |
228 | ||
ac27a0ec | 229 | /* |
dab291af | 230 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
231 | * |
232 | * The only special thing we need to do here is to make sure that all | |
233 | * journal_end calls result in the superblock being marked dirty, so | |
234 | * that sync() will call the filesystem's write_super callback if | |
235 | * appropriate. | |
236 | */ | |
617ba13b | 237 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
238 | { |
239 | journal_t *journal; | |
240 | ||
241 | if (sb->s_flags & MS_RDONLY) | |
242 | return ERR_PTR(-EROFS); | |
243 | ||
6b0310fb | 244 | vfs_check_frozen(sb, SB_FREEZE_WRITE); |
ac27a0ec DK |
245 | /* Special case here: if the journal has aborted behind our |
246 | * backs (eg. EIO in the commit thread), then we still need to | |
247 | * take the FS itself readonly cleanly. */ | |
617ba13b | 248 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
249 | if (journal) { |
250 | if (is_journal_aborted(journal)) { | |
c67d859e | 251 | ext4_abort(sb, "Detected aborted journal"); |
0390131b FM |
252 | return ERR_PTR(-EROFS); |
253 | } | |
254 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 255 | } |
d3d1faf6 | 256 | return ext4_get_nojournal(); |
ac27a0ec DK |
257 | } |
258 | ||
259 | /* | |
260 | * The only special thing we need to do here is to make sure that all | |
dab291af | 261 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
262 | * that sync() will call the filesystem's write_super callback if |
263 | * appropriate. | |
264 | */ | |
617ba13b | 265 | int __ext4_journal_stop(const char *where, handle_t *handle) |
ac27a0ec DK |
266 | { |
267 | struct super_block *sb; | |
268 | int err; | |
269 | int rc; | |
270 | ||
0390131b | 271 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 272 | ext4_put_nojournal(handle); |
0390131b FM |
273 | return 0; |
274 | } | |
ac27a0ec DK |
275 | sb = handle->h_transaction->t_journal->j_private; |
276 | err = handle->h_err; | |
dab291af | 277 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
278 | |
279 | if (!err) | |
280 | err = rc; | |
281 | if (err) | |
617ba13b | 282 | __ext4_std_error(sb, where, err); |
ac27a0ec DK |
283 | return err; |
284 | } | |
285 | ||
617ba13b | 286 | void ext4_journal_abort_handle(const char *caller, const char *err_fn, |
ac27a0ec DK |
287 | struct buffer_head *bh, handle_t *handle, int err) |
288 | { | |
289 | char nbuf[16]; | |
617ba13b | 290 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 291 | |
0390131b FM |
292 | BUG_ON(!ext4_handle_valid(handle)); |
293 | ||
ac27a0ec DK |
294 | if (bh) |
295 | BUFFER_TRACE(bh, "abort"); | |
296 | ||
297 | if (!handle->h_err) | |
298 | handle->h_err = err; | |
299 | ||
300 | if (is_handle_aborted(handle)) | |
301 | return; | |
302 | ||
303 | printk(KERN_ERR "%s: aborting transaction: %s in %s\n", | |
304 | caller, errstr, err_fn); | |
305 | ||
dab291af | 306 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
307 | } |
308 | ||
309 | /* Deal with the reporting of failure conditions on a filesystem such as | |
310 | * inconsistencies detected or read IO failures. | |
311 | * | |
312 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 313 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
314 | * write ordering constraints on the superblock which prevent us from |
315 | * writing it out straight away; and given that the journal is about to | |
316 | * be aborted, we can't rely on the current, or future, transactions to | |
317 | * write out the superblock safely. | |
318 | * | |
dab291af | 319 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 320 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
321 | * that error until we've noted it down and cleared it. |
322 | */ | |
323 | ||
617ba13b | 324 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 325 | { |
617ba13b | 326 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 327 | |
617ba13b MC |
328 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
329 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
ac27a0ec DK |
330 | |
331 | if (sb->s_flags & MS_RDONLY) | |
332 | return; | |
333 | ||
2b2d6d01 | 334 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 335 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 336 | |
4ab2f15b | 337 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 338 | if (journal) |
dab291af | 339 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 340 | } |
2b2d6d01 | 341 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 342 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
343 | sb->s_flags |= MS_RDONLY; |
344 | } | |
e2d67052 | 345 | ext4_commit_super(sb, 1); |
ac27a0ec | 346 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 347 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
348 | sb->s_id); |
349 | } | |
350 | ||
12062ddd | 351 | void __ext4_error(struct super_block *sb, const char *function, |
2b2d6d01 | 352 | const char *fmt, ...) |
ac27a0ec DK |
353 | { |
354 | va_list args; | |
355 | ||
356 | va_start(args, fmt); | |
2b2d6d01 | 357 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
358 | vprintk(fmt, args); |
359 | printk("\n"); | |
360 | va_end(args); | |
361 | ||
617ba13b | 362 | ext4_handle_error(sb); |
ac27a0ec DK |
363 | } |
364 | ||
273df556 FM |
365 | void ext4_error_inode(const char *function, struct inode *inode, |
366 | const char *fmt, ...) | |
367 | { | |
368 | va_list args; | |
369 | ||
370 | va_start(args, fmt); | |
371 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: inode #%lu: (comm %s) ", | |
372 | inode->i_sb->s_id, function, inode->i_ino, current->comm); | |
373 | vprintk(fmt, args); | |
374 | printk("\n"); | |
375 | va_end(args); | |
376 | ||
377 | ext4_handle_error(inode->i_sb); | |
378 | } | |
379 | ||
380 | void ext4_error_file(const char *function, struct file *file, | |
381 | const char *fmt, ...) | |
382 | { | |
383 | va_list args; | |
384 | struct inode *inode = file->f_dentry->d_inode; | |
385 | char pathname[80], *path; | |
386 | ||
387 | va_start(args, fmt); | |
388 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); | |
389 | if (!path) | |
390 | path = "(unknown)"; | |
391 | printk(KERN_CRIT | |
392 | "EXT4-fs error (device %s): %s: inode #%lu (comm %s path %s): ", | |
393 | inode->i_sb->s_id, function, inode->i_ino, current->comm, path); | |
394 | vprintk(fmt, args); | |
395 | printk("\n"); | |
396 | va_end(args); | |
397 | ||
398 | ext4_handle_error(inode->i_sb); | |
399 | } | |
400 | ||
2b2d6d01 | 401 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
402 | char nbuf[16]) |
403 | { | |
404 | char *errstr = NULL; | |
405 | ||
406 | switch (errno) { | |
407 | case -EIO: | |
408 | errstr = "IO failure"; | |
409 | break; | |
410 | case -ENOMEM: | |
411 | errstr = "Out of memory"; | |
412 | break; | |
413 | case -EROFS: | |
78f1ddbb TT |
414 | if (!sb || (EXT4_SB(sb)->s_journal && |
415 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
416 | errstr = "Journal has aborted"; |
417 | else | |
418 | errstr = "Readonly filesystem"; | |
419 | break; | |
420 | default: | |
421 | /* If the caller passed in an extra buffer for unknown | |
422 | * errors, textualise them now. Else we just return | |
423 | * NULL. */ | |
424 | if (nbuf) { | |
425 | /* Check for truncated error codes... */ | |
426 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
427 | errstr = nbuf; | |
428 | } | |
429 | break; | |
430 | } | |
431 | ||
432 | return errstr; | |
433 | } | |
434 | ||
617ba13b | 435 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
436 | * automatically and invokes the appropriate error response. */ |
437 | ||
2b2d6d01 | 438 | void __ext4_std_error(struct super_block *sb, const char *function, int errno) |
ac27a0ec DK |
439 | { |
440 | char nbuf[16]; | |
441 | const char *errstr; | |
442 | ||
443 | /* Special case: if the error is EROFS, and we're not already | |
444 | * inside a transaction, then there's really no point in logging | |
445 | * an error. */ | |
446 | if (errno == -EROFS && journal_current_handle() == NULL && | |
447 | (sb->s_flags & MS_RDONLY)) | |
448 | return; | |
449 | ||
617ba13b | 450 | errstr = ext4_decode_error(sb, errno, nbuf); |
2b2d6d01 TT |
451 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", |
452 | sb->s_id, function, errstr); | |
ac27a0ec | 453 | |
617ba13b | 454 | ext4_handle_error(sb); |
ac27a0ec DK |
455 | } |
456 | ||
457 | /* | |
617ba13b | 458 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
459 | * abort function may be used to deal with unrecoverable failures such |
460 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
461 | * | |
462 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
463 | * unless the error response on the fs has been set to panic in which | |
464 | * case we take the easy way out and panic immediately. | |
465 | */ | |
466 | ||
c67d859e TT |
467 | void __ext4_abort(struct super_block *sb, const char *function, |
468 | const char *fmt, ...) | |
ac27a0ec DK |
469 | { |
470 | va_list args; | |
471 | ||
ac27a0ec | 472 | va_start(args, fmt); |
2b2d6d01 | 473 | printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); |
ac27a0ec DK |
474 | vprintk(fmt, args); |
475 | printk("\n"); | |
476 | va_end(args); | |
477 | ||
478 | if (test_opt(sb, ERRORS_PANIC)) | |
617ba13b | 479 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
480 | |
481 | if (sb->s_flags & MS_RDONLY) | |
482 | return; | |
483 | ||
b31e1552 | 484 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
617ba13b | 485 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
ac27a0ec | 486 | sb->s_flags |= MS_RDONLY; |
4ab2f15b | 487 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ef2cabf7 HK |
488 | if (EXT4_SB(sb)->s_journal) |
489 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
ac27a0ec DK |
490 | } |
491 | ||
b31e1552 ES |
492 | void ext4_msg (struct super_block * sb, const char *prefix, |
493 | const char *fmt, ...) | |
494 | { | |
495 | va_list args; | |
496 | ||
497 | va_start(args, fmt); | |
498 | printk("%sEXT4-fs (%s): ", prefix, sb->s_id); | |
499 | vprintk(fmt, args); | |
500 | printk("\n"); | |
501 | va_end(args); | |
502 | } | |
503 | ||
12062ddd | 504 | void __ext4_warning(struct super_block *sb, const char *function, |
2b2d6d01 | 505 | const char *fmt, ...) |
ac27a0ec DK |
506 | { |
507 | va_list args; | |
508 | ||
509 | va_start(args, fmt); | |
617ba13b | 510 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", |
ac27a0ec DK |
511 | sb->s_id, function); |
512 | vprintk(fmt, args); | |
513 | printk("\n"); | |
514 | va_end(args); | |
515 | } | |
516 | ||
e29136f8 TT |
517 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
518 | struct super_block *sb, ext4_group_t grp, | |
519 | unsigned long ino, ext4_fsblk_t block, | |
520 | const char *fmt, ...) | |
5d1b1b3f AK |
521 | __releases(bitlock) |
522 | __acquires(bitlock) | |
523 | { | |
524 | va_list args; | |
525 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
526 | ||
527 | va_start(args, fmt); | |
e29136f8 TT |
528 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", |
529 | sb->s_id, function, line, grp); | |
530 | if (ino) | |
531 | printk("inode %lu: ", ino); | |
532 | if (block) | |
533 | printk("block %llu:", (unsigned long long) block); | |
5d1b1b3f AK |
534 | vprintk(fmt, args); |
535 | printk("\n"); | |
536 | va_end(args); | |
537 | ||
538 | if (test_opt(sb, ERRORS_CONT)) { | |
539 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
540 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 541 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
542 | return; |
543 | } | |
544 | ext4_unlock_group(sb, grp); | |
545 | ext4_handle_error(sb); | |
546 | /* | |
547 | * We only get here in the ERRORS_RO case; relocking the group | |
548 | * may be dangerous, but nothing bad will happen since the | |
549 | * filesystem will have already been marked read/only and the | |
550 | * journal has been aborted. We return 1 as a hint to callers | |
551 | * who might what to use the return value from | |
552 | * ext4_grp_locked_error() to distinguish beween the | |
553 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
554 | * aggressively from the ext4 function in question, with a | |
555 | * more appropriate error code. | |
556 | */ | |
557 | ext4_lock_group(sb, grp); | |
558 | return; | |
559 | } | |
560 | ||
617ba13b | 561 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 562 | { |
617ba13b | 563 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 564 | |
617ba13b | 565 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
566 | return; |
567 | ||
12062ddd | 568 | ext4_warning(sb, |
ac27a0ec DK |
569 | "updating to rev %d because of new feature flag, " |
570 | "running e2fsck is recommended", | |
617ba13b | 571 | EXT4_DYNAMIC_REV); |
ac27a0ec | 572 | |
617ba13b MC |
573 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
574 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
575 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
576 | /* leave es->s_feature_*compat flags alone */ |
577 | /* es->s_uuid will be set by e2fsck if empty */ | |
578 | ||
579 | /* | |
580 | * The rest of the superblock fields should be zero, and if not it | |
581 | * means they are likely already in use, so leave them alone. We | |
582 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
583 | */ | |
584 | } | |
585 | ||
586 | /* | |
587 | * Open the external journal device | |
588 | */ | |
b31e1552 | 589 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
590 | { |
591 | struct block_device *bdev; | |
592 | char b[BDEVNAME_SIZE]; | |
593 | ||
594 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
595 | if (IS_ERR(bdev)) | |
596 | goto fail; | |
597 | return bdev; | |
598 | ||
599 | fail: | |
b31e1552 | 600 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
601 | __bdevname(dev, b), PTR_ERR(bdev)); |
602 | return NULL; | |
603 | } | |
604 | ||
605 | /* | |
606 | * Release the journal device | |
607 | */ | |
617ba13b | 608 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
609 | { |
610 | bd_release(bdev); | |
9a1c3542 | 611 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
612 | } |
613 | ||
617ba13b | 614 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
615 | { |
616 | struct block_device *bdev; | |
617 | int ret = -ENODEV; | |
618 | ||
619 | bdev = sbi->journal_bdev; | |
620 | if (bdev) { | |
617ba13b | 621 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
622 | sbi->journal_bdev = NULL; |
623 | } | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
628 | { | |
617ba13b | 629 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
630 | } |
631 | ||
617ba13b | 632 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
633 | { |
634 | struct list_head *l; | |
635 | ||
b31e1552 ES |
636 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
637 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
638 | |
639 | printk(KERN_ERR "sb_info orphan list:\n"); | |
640 | list_for_each(l, &sbi->s_orphan) { | |
641 | struct inode *inode = orphan_list_entry(l); | |
642 | printk(KERN_ERR " " | |
643 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
644 | inode->i_sb->s_id, inode->i_ino, inode, | |
645 | inode->i_mode, inode->i_nlink, | |
646 | NEXT_ORPHAN(inode)); | |
647 | } | |
648 | } | |
649 | ||
2b2d6d01 | 650 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 651 | { |
617ba13b MC |
652 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
653 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 654 | int i, err; |
ac27a0ec | 655 | |
e0ccfd95 CH |
656 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
657 | ||
4c0425ff MC |
658 | flush_workqueue(sbi->dio_unwritten_wq); |
659 | destroy_workqueue(sbi->dio_unwritten_wq); | |
660 | ||
a9e220f8 | 661 | lock_super(sb); |
6cfd0148 | 662 | lock_kernel(); |
8c85e125 | 663 | if (sb->s_dirt) |
ebc1ac16 | 664 | ext4_commit_super(sb, 1); |
8c85e125 | 665 | |
0390131b FM |
666 | if (sbi->s_journal) { |
667 | err = jbd2_journal_destroy(sbi->s_journal); | |
668 | sbi->s_journal = NULL; | |
669 | if (err < 0) | |
c67d859e | 670 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 671 | } |
d4edac31 JB |
672 | |
673 | ext4_release_system_zone(sb); | |
674 | ext4_mb_release(sb); | |
675 | ext4_ext_release(sb); | |
676 | ext4_xattr_put_super(sb); | |
677 | ||
ac27a0ec | 678 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 679 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 680 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 681 | ext4_commit_super(sb, 1); |
ac27a0ec | 682 | } |
240799cd | 683 | if (sbi->s_proc) { |
9f6200bb | 684 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 685 | } |
3197ebdb | 686 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
687 | |
688 | for (i = 0; i < sbi->s_gdb_count; i++) | |
689 | brelse(sbi->s_group_desc[i]); | |
690 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
691 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
692 | vfree(sbi->s_flex_groups); | |
693 | else | |
694 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
695 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
696 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
697 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 698 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
699 | brelse(sbi->s_sbh); |
700 | #ifdef CONFIG_QUOTA | |
701 | for (i = 0; i < MAXQUOTAS; i++) | |
702 | kfree(sbi->s_qf_names[i]); | |
703 | #endif | |
704 | ||
705 | /* Debugging code just in case the in-memory inode orphan list | |
706 | * isn't empty. The on-disk one can be non-empty if we've | |
707 | * detected an error and taken the fs readonly, but the | |
708 | * in-memory list had better be clean by this point. */ | |
709 | if (!list_empty(&sbi->s_orphan)) | |
710 | dump_orphan_list(sb, sbi); | |
711 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
712 | ||
f98393a6 | 713 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
714 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
715 | /* | |
716 | * Invalidate the journal device's buffers. We don't want them | |
717 | * floating about in memory - the physical journal device may | |
718 | * hotswapped, and it breaks the `ro-after' testing code. | |
719 | */ | |
720 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 721 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 722 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
723 | } |
724 | sb->s_fs_info = NULL; | |
3197ebdb TT |
725 | /* |
726 | * Now that we are completely done shutting down the | |
727 | * superblock, we need to actually destroy the kobject. | |
728 | */ | |
729 | unlock_kernel(); | |
730 | unlock_super(sb); | |
731 | kobject_put(&sbi->s_kobj); | |
732 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 733 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 734 | kfree(sbi); |
ac27a0ec DK |
735 | } |
736 | ||
e18b890b | 737 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
738 | |
739 | /* | |
740 | * Called inside transaction, so use GFP_NOFS | |
741 | */ | |
617ba13b | 742 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 743 | { |
617ba13b | 744 | struct ext4_inode_info *ei; |
ac27a0ec | 745 | |
e6b4f8da | 746 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
747 | if (!ei) |
748 | return NULL; | |
0b8e58a1 | 749 | |
ac27a0ec | 750 | ei->vfs_inode.i_version = 1; |
91246c00 | 751 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 752 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
753 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
754 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
755 | /* |
756 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
757 | * therefore it can be null here. Don't check it, just initialize | |
758 | * jinode. | |
759 | */ | |
678aaf48 | 760 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
761 | ei->i_reserved_data_blocks = 0; |
762 | ei->i_reserved_meta_blocks = 0; | |
763 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 764 | ei->i_da_metadata_calc_len = 0; |
d2a17637 MC |
765 | ei->i_delalloc_reserved_flag = 0; |
766 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
a9e7f447 DM |
767 | #ifdef CONFIG_QUOTA |
768 | ei->i_reserved_quota = 0; | |
769 | #endif | |
c7064ef1 | 770 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 771 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 772 | ei->cur_aio_dio = NULL; |
b436b9be JK |
773 | ei->i_sync_tid = 0; |
774 | ei->i_datasync_tid = 0; | |
0b8e58a1 | 775 | |
ac27a0ec DK |
776 | return &ei->vfs_inode; |
777 | } | |
778 | ||
617ba13b | 779 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 780 | { |
9f7dd93d | 781 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
782 | ext4_msg(inode->i_sb, KERN_ERR, |
783 | "Inode %lu (%p): orphan list check failed!", | |
784 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
785 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
786 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
787 | true); | |
788 | dump_stack(); | |
789 | } | |
617ba13b | 790 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
791 | } |
792 | ||
51cc5068 | 793 | static void init_once(void *foo) |
ac27a0ec | 794 | { |
617ba13b | 795 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 796 | |
a35afb83 | 797 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 798 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 799 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 800 | #endif |
0e855ac8 | 801 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 802 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
803 | } |
804 | ||
805 | static int init_inodecache(void) | |
806 | { | |
617ba13b MC |
807 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
808 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
809 | 0, (SLAB_RECLAIM_ACCOUNT| |
810 | SLAB_MEM_SPREAD), | |
20c2df83 | 811 | init_once); |
617ba13b | 812 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
813 | return -ENOMEM; |
814 | return 0; | |
815 | } | |
816 | ||
817 | static void destroy_inodecache(void) | |
818 | { | |
617ba13b | 819 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
820 | } |
821 | ||
617ba13b | 822 | static void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 823 | { |
9f754758 | 824 | dquot_drop(inode); |
c2ea3fde | 825 | ext4_discard_preallocations(inode); |
0390131b FM |
826 | if (EXT4_JOURNAL(inode)) |
827 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 828 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
829 | } |
830 | ||
2b2d6d01 TT |
831 | static inline void ext4_show_quota_options(struct seq_file *seq, |
832 | struct super_block *sb) | |
ac27a0ec DK |
833 | { |
834 | #if defined(CONFIG_QUOTA) | |
617ba13b | 835 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 836 | |
5a20bdfc JK |
837 | if (sbi->s_jquota_fmt) { |
838 | char *fmtname = ""; | |
839 | ||
840 | switch (sbi->s_jquota_fmt) { | |
841 | case QFMT_VFS_OLD: | |
842 | fmtname = "vfsold"; | |
843 | break; | |
844 | case QFMT_VFS_V0: | |
845 | fmtname = "vfsv0"; | |
846 | break; | |
847 | case QFMT_VFS_V1: | |
848 | fmtname = "vfsv1"; | |
849 | break; | |
850 | } | |
851 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
852 | } | |
ac27a0ec DK |
853 | |
854 | if (sbi->s_qf_names[USRQUOTA]) | |
855 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
856 | ||
857 | if (sbi->s_qf_names[GRPQUOTA]) | |
858 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
859 | ||
482a7425 | 860 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
861 | seq_puts(seq, ",usrquota"); |
862 | ||
482a7425 | 863 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
864 | seq_puts(seq, ",grpquota"); |
865 | #endif | |
866 | } | |
867 | ||
d9c9bef1 MS |
868 | /* |
869 | * Show an option if | |
870 | * - it's set to a non-default value OR | |
871 | * - if the per-sb default is different from the global default | |
872 | */ | |
617ba13b | 873 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 874 | { |
aa22df2c AK |
875 | int def_errors; |
876 | unsigned long def_mount_opts; | |
ac27a0ec | 877 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
878 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
879 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
880 | |
881 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 882 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
883 | |
884 | if (sbi->s_sb_block != 1) | |
885 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
886 | if (test_opt(sb, MINIX_DF)) | |
887 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 888 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
889 | seq_puts(seq, ",grpid"); |
890 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
891 | seq_puts(seq, ",nogrpid"); | |
892 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
893 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
894 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
895 | } | |
896 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
897 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
898 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
899 | } | |
bb4f397a | 900 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 901 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
902 | def_errors == EXT4_ERRORS_CONTINUE) { |
903 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
904 | } |
905 | } | |
aa22df2c | 906 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 907 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 908 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 909 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 910 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 911 | seq_puts(seq, ",nouid32"); |
aa22df2c | 912 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
913 | seq_puts(seq, ",debug"); |
914 | if (test_opt(sb, OLDALLOC)) | |
915 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 916 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
917 | if (test_opt(sb, XATTR_USER) && |
918 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
919 | seq_puts(seq, ",user_xattr"); |
920 | if (!test_opt(sb, XATTR_USER) && | |
921 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
922 | seq_puts(seq, ",nouser_xattr"); | |
923 | } | |
924 | #endif | |
03010a33 | 925 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 926 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
927 | seq_puts(seq, ",acl"); |
928 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
929 | seq_puts(seq, ",noacl"); | |
930 | #endif | |
30773840 | 931 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
932 | seq_printf(seq, ",commit=%u", |
933 | (unsigned) (sbi->s_commit_interval / HZ)); | |
934 | } | |
30773840 TT |
935 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
936 | seq_printf(seq, ",min_batch_time=%u", | |
937 | (unsigned) sbi->s_min_batch_time); | |
938 | } | |
939 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
940 | seq_printf(seq, ",max_batch_time=%u", | |
941 | (unsigned) sbi->s_min_batch_time); | |
942 | } | |
943 | ||
571640ca ES |
944 | /* |
945 | * We're changing the default of barrier mount option, so | |
946 | * let's always display its mount state so it's clear what its | |
947 | * status is. | |
948 | */ | |
949 | seq_puts(seq, ",barrier="); | |
950 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
951 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
952 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
953 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
954 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
955 | if (test_opt(sb, I_VERSION)) |
956 | seq_puts(seq, ",i_version"); | |
dd919b98 AK |
957 | if (!test_opt(sb, DELALLOC)) |
958 | seq_puts(seq, ",nodelalloc"); | |
959 | ||
ac27a0ec | 960 | |
cb45bbe4 MS |
961 | if (sbi->s_stripe) |
962 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
963 | /* |
964 | * journal mode get enabled in different ways | |
965 | * So just print the value even if we didn't specify it | |
966 | */ | |
617ba13b | 967 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 968 | seq_puts(seq, ",data=journal"); |
617ba13b | 969 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 970 | seq_puts(seq, ",data=ordered"); |
617ba13b | 971 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
972 | seq_puts(seq, ",data=writeback"); |
973 | ||
240799cd TT |
974 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
975 | seq_printf(seq, ",inode_readahead_blks=%u", | |
976 | sbi->s_inode_readahead_blks); | |
977 | ||
5bf5683a HK |
978 | if (test_opt(sb, DATA_ERR_ABORT)) |
979 | seq_puts(seq, ",data_err=abort"); | |
980 | ||
afd4672d | 981 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 982 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 983 | |
5328e635 ES |
984 | if (test_opt(sb, DISCARD)) |
985 | seq_puts(seq, ",discard"); | |
986 | ||
e3bb52ae ES |
987 | if (test_opt(sb, NOLOAD)) |
988 | seq_puts(seq, ",norecovery"); | |
989 | ||
744692dc JZ |
990 | if (test_opt(sb, DIOREAD_NOLOCK)) |
991 | seq_puts(seq, ",dioread_nolock"); | |
992 | ||
617ba13b | 993 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 994 | |
ac27a0ec DK |
995 | return 0; |
996 | } | |
997 | ||
1b961ac0 | 998 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 999 | u64 ino, u32 generation) |
ac27a0ec | 1000 | { |
ac27a0ec | 1001 | struct inode *inode; |
ac27a0ec | 1002 | |
617ba13b | 1003 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1004 | return ERR_PTR(-ESTALE); |
617ba13b | 1005 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1006 | return ERR_PTR(-ESTALE); |
1007 | ||
1008 | /* iget isn't really right if the inode is currently unallocated!! | |
1009 | * | |
617ba13b | 1010 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1011 | * deleted, so we should be safe. |
1012 | * | |
1013 | * Currently we don't know the generation for parent directory, so | |
1014 | * a generation of 0 means "accept any" | |
1015 | */ | |
1d1fe1ee DH |
1016 | inode = ext4_iget(sb, ino); |
1017 | if (IS_ERR(inode)) | |
1018 | return ERR_CAST(inode); | |
1019 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1020 | iput(inode); |
1021 | return ERR_PTR(-ESTALE); | |
1022 | } | |
1b961ac0 CH |
1023 | |
1024 | return inode; | |
1025 | } | |
1026 | ||
1027 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1028 | int fh_len, int fh_type) |
1b961ac0 CH |
1029 | { |
1030 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1031 | ext4_nfs_get_inode); | |
1032 | } | |
1033 | ||
1034 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1035 | int fh_len, int fh_type) |
1b961ac0 CH |
1036 | { |
1037 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1038 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1039 | } |
1040 | ||
c39a7f84 TO |
1041 | /* |
1042 | * Try to release metadata pages (indirect blocks, directories) which are | |
1043 | * mapped via the block device. Since these pages could have journal heads | |
1044 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1045 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1046 | */ | |
0b8e58a1 AD |
1047 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1048 | gfp_t wait) | |
c39a7f84 TO |
1049 | { |
1050 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1051 | ||
1052 | WARN_ON(PageChecked(page)); | |
1053 | if (!page_has_buffers(page)) | |
1054 | return 0; | |
1055 | if (journal) | |
1056 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1057 | wait & ~__GFP_WAIT); | |
1058 | return try_to_free_buffers(page); | |
1059 | } | |
1060 | ||
ac27a0ec | 1061 | #ifdef CONFIG_QUOTA |
af5bc92d | 1062 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1063 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1064 | |
617ba13b MC |
1065 | static int ext4_write_dquot(struct dquot *dquot); |
1066 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1067 | static int ext4_release_dquot(struct dquot *dquot); | |
1068 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1069 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1070 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 1071 | char *path); |
617ba13b MC |
1072 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1073 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1074 | size_t len, loff_t off); |
617ba13b | 1075 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1076 | const char *data, size_t len, loff_t off); |
1077 | ||
61e225dc | 1078 | static const struct dquot_operations ext4_quota_operations = { |
a9e7f447 | 1079 | #ifdef CONFIG_QUOTA |
60e58e0f | 1080 | .get_reserved_space = ext4_get_reserved_space, |
a9e7f447 | 1081 | #endif |
617ba13b MC |
1082 | .write_dquot = ext4_write_dquot, |
1083 | .acquire_dquot = ext4_acquire_dquot, | |
1084 | .release_dquot = ext4_release_dquot, | |
1085 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1086 | .write_info = ext4_write_info, |
1087 | .alloc_dquot = dquot_alloc, | |
1088 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1089 | }; |
1090 | ||
0d54b217 | 1091 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1092 | .quota_on = ext4_quota_on, |
287a8095 CH |
1093 | .quota_off = dquot_quota_off, |
1094 | .quota_sync = dquot_quota_sync, | |
1095 | .get_info = dquot_get_dqinfo, | |
1096 | .set_info = dquot_set_dqinfo, | |
1097 | .get_dqblk = dquot_get_dqblk, | |
1098 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1099 | }; |
1100 | #endif | |
1101 | ||
ee9b6d61 | 1102 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1103 | .alloc_inode = ext4_alloc_inode, |
1104 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1105 | .write_inode = ext4_write_inode, |
1106 | .dirty_inode = ext4_dirty_inode, | |
1107 | .delete_inode = ext4_delete_inode, | |
1108 | .put_super = ext4_put_super, | |
617ba13b | 1109 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1110 | .freeze_fs = ext4_freeze, |
1111 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1112 | .statfs = ext4_statfs, |
1113 | .remount_fs = ext4_remount, | |
1114 | .clear_inode = ext4_clear_inode, | |
1115 | .show_options = ext4_show_options, | |
ac27a0ec | 1116 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1117 | .quota_read = ext4_quota_read, |
1118 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1119 | #endif |
c39a7f84 | 1120 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1121 | }; |
1122 | ||
9ca92389 TT |
1123 | static const struct super_operations ext4_nojournal_sops = { |
1124 | .alloc_inode = ext4_alloc_inode, | |
1125 | .destroy_inode = ext4_destroy_inode, | |
1126 | .write_inode = ext4_write_inode, | |
1127 | .dirty_inode = ext4_dirty_inode, | |
1128 | .delete_inode = ext4_delete_inode, | |
1129 | .write_super = ext4_write_super, | |
1130 | .put_super = ext4_put_super, | |
1131 | .statfs = ext4_statfs, | |
1132 | .remount_fs = ext4_remount, | |
1133 | .clear_inode = ext4_clear_inode, | |
1134 | .show_options = ext4_show_options, | |
1135 | #ifdef CONFIG_QUOTA | |
1136 | .quota_read = ext4_quota_read, | |
1137 | .quota_write = ext4_quota_write, | |
1138 | #endif | |
1139 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1140 | }; | |
1141 | ||
39655164 | 1142 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1143 | .fh_to_dentry = ext4_fh_to_dentry, |
1144 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1145 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1146 | }; |
1147 | ||
1148 | enum { | |
1149 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1150 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1151 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1152 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1153 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1154 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1155 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1156 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1157 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1158 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1159 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1160 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1161 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1162 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1163 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1164 | Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1165 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1166 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1167 | Opt_discard, Opt_nodiscard, |
ac27a0ec DK |
1168 | }; |
1169 | ||
a447c093 | 1170 | static const match_table_t tokens = { |
ac27a0ec DK |
1171 | {Opt_bsd_df, "bsddf"}, |
1172 | {Opt_minix_df, "minixdf"}, | |
1173 | {Opt_grpid, "grpid"}, | |
1174 | {Opt_grpid, "bsdgroups"}, | |
1175 | {Opt_nogrpid, "nogrpid"}, | |
1176 | {Opt_nogrpid, "sysvgroups"}, | |
1177 | {Opt_resgid, "resgid=%u"}, | |
1178 | {Opt_resuid, "resuid=%u"}, | |
1179 | {Opt_sb, "sb=%u"}, | |
1180 | {Opt_err_cont, "errors=continue"}, | |
1181 | {Opt_err_panic, "errors=panic"}, | |
1182 | {Opt_err_ro, "errors=remount-ro"}, | |
1183 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1184 | {Opt_debug, "debug"}, |
1185 | {Opt_oldalloc, "oldalloc"}, | |
1186 | {Opt_orlov, "orlov"}, | |
1187 | {Opt_user_xattr, "user_xattr"}, | |
1188 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1189 | {Opt_acl, "acl"}, | |
1190 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1191 | {Opt_noload, "noload"}, |
e3bb52ae | 1192 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1193 | {Opt_nobh, "nobh"}, |
1194 | {Opt_bh, "bh"}, | |
1195 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1196 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1197 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1198 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1199 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1200 | {Opt_journal_checksum, "journal_checksum"}, |
1201 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1202 | {Opt_abort, "abort"}, |
1203 | {Opt_data_journal, "data=journal"}, | |
1204 | {Opt_data_ordered, "data=ordered"}, | |
1205 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1206 | {Opt_data_err_abort, "data_err=abort"}, |
1207 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1208 | {Opt_offusrjquota, "usrjquota="}, |
1209 | {Opt_usrjquota, "usrjquota=%s"}, | |
1210 | {Opt_offgrpjquota, "grpjquota="}, | |
1211 | {Opt_grpjquota, "grpjquota=%s"}, | |
1212 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1213 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1214 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1215 | {Opt_grpquota, "grpquota"}, |
1216 | {Opt_noquota, "noquota"}, | |
1217 | {Opt_quota, "quota"}, | |
1218 | {Opt_usrquota, "usrquota"}, | |
1219 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1220 | {Opt_barrier, "barrier"}, |
1221 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1222 | {Opt_i_version, "i_version"}, |
c9de560d | 1223 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1224 | {Opt_resize, "resize"}, |
64769240 | 1225 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1226 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1227 | {Opt_block_validity, "block_validity"}, |
1228 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1229 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1230 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1231 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1232 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1233 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1234 | {Opt_dioread_nolock, "dioread_nolock"}, |
1235 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1236 | {Opt_discard, "discard"}, |
1237 | {Opt_nodiscard, "nodiscard"}, | |
f3f12faa | 1238 | {Opt_err, NULL}, |
ac27a0ec DK |
1239 | }; |
1240 | ||
617ba13b | 1241 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1242 | { |
617ba13b | 1243 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1244 | char *options = (char *) *data; |
1245 | ||
1246 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1247 | return 1; /* Default location */ | |
0b8e58a1 | 1248 | |
ac27a0ec | 1249 | options += 3; |
0b8e58a1 | 1250 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1251 | sb_block = simple_strtoul(options, &options, 0); |
1252 | if (*options && *options != ',') { | |
4776004f | 1253 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1254 | (char *) *data); |
1255 | return 1; | |
1256 | } | |
1257 | if (*options == ',') | |
1258 | options++; | |
1259 | *data = (void *) options; | |
0b8e58a1 | 1260 | |
ac27a0ec DK |
1261 | return sb_block; |
1262 | } | |
1263 | ||
b3881f74 | 1264 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1265 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1266 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1267 | |
56c50f11 DM |
1268 | #ifdef CONFIG_QUOTA |
1269 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1270 | { | |
1271 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1272 | char *qname; | |
1273 | ||
1274 | if (sb_any_quota_loaded(sb) && | |
1275 | !sbi->s_qf_names[qtype]) { | |
1276 | ext4_msg(sb, KERN_ERR, | |
1277 | "Cannot change journaled " | |
1278 | "quota options when quota turned on"); | |
1279 | return 0; | |
1280 | } | |
1281 | qname = match_strdup(args); | |
1282 | if (!qname) { | |
1283 | ext4_msg(sb, KERN_ERR, | |
1284 | "Not enough memory for storing quotafile name"); | |
1285 | return 0; | |
1286 | } | |
1287 | if (sbi->s_qf_names[qtype] && | |
1288 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1289 | ext4_msg(sb, KERN_ERR, | |
1290 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1291 | kfree(qname); | |
1292 | return 0; | |
1293 | } | |
1294 | sbi->s_qf_names[qtype] = qname; | |
1295 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1296 | ext4_msg(sb, KERN_ERR, | |
1297 | "quotafile must be on filesystem root"); | |
1298 | kfree(sbi->s_qf_names[qtype]); | |
1299 | sbi->s_qf_names[qtype] = NULL; | |
1300 | return 0; | |
1301 | } | |
1302 | set_opt(sbi->s_mount_opt, QUOTA); | |
1303 | return 1; | |
1304 | } | |
1305 | ||
1306 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1307 | { | |
1308 | ||
1309 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1310 | ||
1311 | if (sb_any_quota_loaded(sb) && | |
1312 | sbi->s_qf_names[qtype]) { | |
1313 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1314 | " when quota turned on"); | |
1315 | return 0; | |
1316 | } | |
1317 | /* | |
1318 | * The space will be released later when all options are confirmed | |
1319 | * to be correct | |
1320 | */ | |
1321 | sbi->s_qf_names[qtype] = NULL; | |
1322 | return 1; | |
1323 | } | |
1324 | #endif | |
1325 | ||
2b2d6d01 | 1326 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1327 | unsigned long *journal_devnum, |
b3881f74 | 1328 | unsigned int *journal_ioprio, |
2b2d6d01 | 1329 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1330 | { |
617ba13b | 1331 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1332 | char *p; |
ac27a0ec DK |
1333 | substring_t args[MAX_OPT_ARGS]; |
1334 | int data_opt = 0; | |
1335 | int option; | |
1336 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1337 | int qfmt; |
ac27a0ec DK |
1338 | #endif |
1339 | ||
1340 | if (!options) | |
1341 | return 1; | |
1342 | ||
2b2d6d01 | 1343 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1344 | int token; |
1345 | if (!*p) | |
1346 | continue; | |
1347 | ||
15121c18 ES |
1348 | /* |
1349 | * Initialize args struct so we know whether arg was | |
1350 | * found; some options take optional arguments. | |
1351 | */ | |
1352 | args[0].to = args[0].from = 0; | |
ac27a0ec DK |
1353 | token = match_token(p, tokens, args); |
1354 | switch (token) { | |
1355 | case Opt_bsd_df: | |
437ca0fd | 1356 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1357 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1358 | break; |
1359 | case Opt_minix_df: | |
437ca0fd | 1360 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1361 | set_opt(sbi->s_mount_opt, MINIX_DF); |
437ca0fd | 1362 | |
ac27a0ec DK |
1363 | break; |
1364 | case Opt_grpid: | |
437ca0fd | 1365 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1366 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1367 | |
ac27a0ec DK |
1368 | break; |
1369 | case Opt_nogrpid: | |
437ca0fd | 1370 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1371 | clear_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1372 | |
ac27a0ec DK |
1373 | break; |
1374 | case Opt_resuid: | |
1375 | if (match_int(&args[0], &option)) | |
1376 | return 0; | |
1377 | sbi->s_resuid = option; | |
1378 | break; | |
1379 | case Opt_resgid: | |
1380 | if (match_int(&args[0], &option)) | |
1381 | return 0; | |
1382 | sbi->s_resgid = option; | |
1383 | break; | |
1384 | case Opt_sb: | |
1385 | /* handled by get_sb_block() instead of here */ | |
1386 | /* *sb_block = match_int(&args[0]); */ | |
1387 | break; | |
1388 | case Opt_err_panic: | |
2b2d6d01 TT |
1389 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1390 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1391 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1392 | break; |
1393 | case Opt_err_ro: | |
2b2d6d01 TT |
1394 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1395 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1396 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1397 | break; |
1398 | case Opt_err_cont: | |
2b2d6d01 TT |
1399 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1400 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1401 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1402 | break; |
1403 | case Opt_nouid32: | |
2b2d6d01 | 1404 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1405 | break; |
ac27a0ec | 1406 | case Opt_debug: |
2b2d6d01 | 1407 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1408 | break; |
1409 | case Opt_oldalloc: | |
2b2d6d01 | 1410 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1411 | break; |
1412 | case Opt_orlov: | |
2b2d6d01 | 1413 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1414 | break; |
03010a33 | 1415 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1416 | case Opt_user_xattr: |
2b2d6d01 | 1417 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1418 | break; |
1419 | case Opt_nouser_xattr: | |
2b2d6d01 | 1420 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1421 | break; |
1422 | #else | |
1423 | case Opt_user_xattr: | |
1424 | case Opt_nouser_xattr: | |
b31e1552 | 1425 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1426 | break; |
1427 | #endif | |
03010a33 | 1428 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1429 | case Opt_acl: |
1430 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1431 | break; | |
1432 | case Opt_noacl: | |
1433 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1434 | break; | |
1435 | #else | |
1436 | case Opt_acl: | |
1437 | case Opt_noacl: | |
b31e1552 | 1438 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1439 | break; |
1440 | #endif | |
ac27a0ec DK |
1441 | case Opt_journal_update: |
1442 | /* @@@ FIXME */ | |
1443 | /* Eventually we will want to be able to create | |
1444 | a journal file here. For now, only allow the | |
1445 | user to specify an existing inode to be the | |
1446 | journal file. */ | |
1447 | if (is_remount) { | |
b31e1552 ES |
1448 | ext4_msg(sb, KERN_ERR, |
1449 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1450 | return 0; |
1451 | } | |
2b2d6d01 | 1452 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1453 | break; |
ac27a0ec DK |
1454 | case Opt_journal_dev: |
1455 | if (is_remount) { | |
b31e1552 ES |
1456 | ext4_msg(sb, KERN_ERR, |
1457 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1458 | return 0; |
1459 | } | |
1460 | if (match_int(&args[0], &option)) | |
1461 | return 0; | |
1462 | *journal_devnum = option; | |
1463 | break; | |
818d276c | 1464 | case Opt_journal_checksum: |
d4da6c9c LT |
1465 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
1466 | break; | |
818d276c GS |
1467 | case Opt_journal_async_commit: |
1468 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
d4da6c9c | 1469 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
818d276c | 1470 | break; |
ac27a0ec | 1471 | case Opt_noload: |
2b2d6d01 | 1472 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1473 | break; |
1474 | case Opt_commit: | |
1475 | if (match_int(&args[0], &option)) | |
1476 | return 0; | |
1477 | if (option < 0) | |
1478 | return 0; | |
1479 | if (option == 0) | |
cd02ff0b | 1480 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1481 | sbi->s_commit_interval = HZ * option; |
1482 | break; | |
30773840 TT |
1483 | case Opt_max_batch_time: |
1484 | if (match_int(&args[0], &option)) | |
1485 | return 0; | |
1486 | if (option < 0) | |
1487 | return 0; | |
1488 | if (option == 0) | |
1489 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1490 | sbi->s_max_batch_time = option; | |
1491 | break; | |
1492 | case Opt_min_batch_time: | |
1493 | if (match_int(&args[0], &option)) | |
1494 | return 0; | |
1495 | if (option < 0) | |
1496 | return 0; | |
1497 | sbi->s_min_batch_time = option; | |
1498 | break; | |
ac27a0ec | 1499 | case Opt_data_journal: |
617ba13b | 1500 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1501 | goto datacheck; |
1502 | case Opt_data_ordered: | |
617ba13b | 1503 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1504 | goto datacheck; |
1505 | case Opt_data_writeback: | |
617ba13b | 1506 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1507 | datacheck: |
1508 | if (is_remount) { | |
482a7425 | 1509 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1510 | ext4_msg(sb, KERN_ERR, |
1511 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1512 | return 0; |
1513 | } | |
1514 | } else { | |
482a7425 | 1515 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
ac27a0ec DK |
1516 | sbi->s_mount_opt |= data_opt; |
1517 | } | |
1518 | break; | |
5bf5683a HK |
1519 | case Opt_data_err_abort: |
1520 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1521 | break; | |
1522 | case Opt_data_err_ignore: | |
1523 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1524 | break; | |
ac27a0ec DK |
1525 | #ifdef CONFIG_QUOTA |
1526 | case Opt_usrjquota: | |
56c50f11 | 1527 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1528 | return 0; |
56c50f11 DM |
1529 | break; |
1530 | case Opt_grpjquota: | |
1531 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1532 | return 0; |
ac27a0ec DK |
1533 | break; |
1534 | case Opt_offusrjquota: | |
56c50f11 DM |
1535 | if (!clear_qf_name(sb, USRQUOTA)) |
1536 | return 0; | |
1537 | break; | |
ac27a0ec | 1538 | case Opt_offgrpjquota: |
56c50f11 | 1539 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1540 | return 0; |
ac27a0ec | 1541 | break; |
56c50f11 | 1542 | |
ac27a0ec | 1543 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1544 | qfmt = QFMT_VFS_OLD; |
1545 | goto set_qf_format; | |
ac27a0ec | 1546 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1547 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1548 | goto set_qf_format; |
1549 | case Opt_jqfmt_vfsv1: | |
1550 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1551 | set_qf_format: |
17bd13b3 | 1552 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1553 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1554 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1555 | "journaled quota options when " |
b31e1552 | 1556 | "quota turned on"); |
dfc5d03f JK |
1557 | return 0; |
1558 | } | |
1559 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1560 | break; |
1561 | case Opt_quota: | |
1562 | case Opt_usrquota: | |
1563 | set_opt(sbi->s_mount_opt, QUOTA); | |
1564 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1565 | break; | |
1566 | case Opt_grpquota: | |
1567 | set_opt(sbi->s_mount_opt, QUOTA); | |
1568 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1569 | break; | |
1570 | case Opt_noquota: | |
17bd13b3 | 1571 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1572 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1573 | "options when quota turned on"); | |
ac27a0ec DK |
1574 | return 0; |
1575 | } | |
1576 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1577 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1578 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1579 | break; | |
1580 | #else | |
1581 | case Opt_quota: | |
1582 | case Opt_usrquota: | |
1583 | case Opt_grpquota: | |
b31e1552 ES |
1584 | ext4_msg(sb, KERN_ERR, |
1585 | "quota options not supported"); | |
cd59e7b9 | 1586 | break; |
ac27a0ec DK |
1587 | case Opt_usrjquota: |
1588 | case Opt_grpjquota: | |
1589 | case Opt_offusrjquota: | |
1590 | case Opt_offgrpjquota: | |
1591 | case Opt_jqfmt_vfsold: | |
1592 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1593 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1594 | ext4_msg(sb, KERN_ERR, |
1595 | "journaled quota options not supported"); | |
ac27a0ec DK |
1596 | break; |
1597 | case Opt_noquota: | |
1598 | break; | |
1599 | #endif | |
1600 | case Opt_abort: | |
4ab2f15b | 1601 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1602 | break; |
06705bff TT |
1603 | case Opt_nobarrier: |
1604 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1605 | break; | |
ac27a0ec | 1606 | case Opt_barrier: |
15121c18 ES |
1607 | if (args[0].from) { |
1608 | if (match_int(&args[0], &option)) | |
1609 | return 0; | |
1610 | } else | |
1611 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec DK |
1612 | if (option) |
1613 | set_opt(sbi->s_mount_opt, BARRIER); | |
1614 | else | |
1615 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1616 | break; | |
1617 | case Opt_ignore: | |
1618 | break; | |
1619 | case Opt_resize: | |
1620 | if (!is_remount) { | |
b31e1552 ES |
1621 | ext4_msg(sb, KERN_ERR, |
1622 | "resize option only available " | |
1623 | "for remount"); | |
ac27a0ec DK |
1624 | return 0; |
1625 | } | |
1626 | if (match_int(&args[0], &option) != 0) | |
1627 | return 0; | |
1628 | *n_blocks_count = option; | |
1629 | break; | |
1630 | case Opt_nobh: | |
206f7ab4 CH |
1631 | ext4_msg(sb, KERN_WARNING, |
1632 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1633 | break; |
1634 | case Opt_bh: | |
206f7ab4 CH |
1635 | ext4_msg(sb, KERN_WARNING, |
1636 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1637 | break; |
25ec56b5 JNC |
1638 | case Opt_i_version: |
1639 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1640 | sb->s_flags |= MS_I_VERSION; | |
1641 | break; | |
dd919b98 AK |
1642 | case Opt_nodelalloc: |
1643 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1644 | break; | |
c9de560d AT |
1645 | case Opt_stripe: |
1646 | if (match_int(&args[0], &option)) | |
1647 | return 0; | |
1648 | if (option < 0) | |
1649 | return 0; | |
1650 | sbi->s_stripe = option; | |
1651 | break; | |
64769240 AT |
1652 | case Opt_delalloc: |
1653 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1654 | break; | |
6fd058f7 TT |
1655 | case Opt_block_validity: |
1656 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1657 | break; | |
1658 | case Opt_noblock_validity: | |
1659 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1660 | break; | |
240799cd TT |
1661 | case Opt_inode_readahead_blks: |
1662 | if (match_int(&args[0], &option)) | |
1663 | return 0; | |
1664 | if (option < 0 || option > (1 << 30)) | |
1665 | return 0; | |
f7c43950 | 1666 | if (!is_power_of_2(option)) { |
b31e1552 ES |
1667 | ext4_msg(sb, KERN_ERR, |
1668 | "EXT4-fs: inode_readahead_blks" | |
1669 | " must be a power of 2"); | |
3197ebdb TT |
1670 | return 0; |
1671 | } | |
240799cd TT |
1672 | sbi->s_inode_readahead_blks = option; |
1673 | break; | |
b3881f74 TT |
1674 | case Opt_journal_ioprio: |
1675 | if (match_int(&args[0], &option)) | |
1676 | return 0; | |
1677 | if (option < 0 || option > 7) | |
1678 | break; | |
1679 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1680 | option); | |
1681 | break; | |
06705bff TT |
1682 | case Opt_noauto_da_alloc: |
1683 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1684 | break; | |
afd4672d | 1685 | case Opt_auto_da_alloc: |
15121c18 ES |
1686 | if (args[0].from) { |
1687 | if (match_int(&args[0], &option)) | |
1688 | return 0; | |
1689 | } else | |
1690 | option = 1; /* No argument, default to 1 */ | |
afd4672d TT |
1691 | if (option) |
1692 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1693 | else | |
1694 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1695 | break; | |
5328e635 ES |
1696 | case Opt_discard: |
1697 | set_opt(sbi->s_mount_opt, DISCARD); | |
1698 | break; | |
1699 | case Opt_nodiscard: | |
1700 | clear_opt(sbi->s_mount_opt, DISCARD); | |
1701 | break; | |
744692dc JZ |
1702 | case Opt_dioread_nolock: |
1703 | set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1704 | break; | |
1705 | case Opt_dioread_lock: | |
1706 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1707 | break; | |
ac27a0ec | 1708 | default: |
b31e1552 ES |
1709 | ext4_msg(sb, KERN_ERR, |
1710 | "Unrecognized mount option \"%s\" " | |
1711 | "or missing value", p); | |
ac27a0ec DK |
1712 | return 0; |
1713 | } | |
1714 | } | |
1715 | #ifdef CONFIG_QUOTA | |
1716 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1717 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
ac27a0ec DK |
1718 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1719 | ||
482a7425 | 1720 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
ac27a0ec DK |
1721 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1722 | ||
56c50f11 | 1723 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1724 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1725 | "format mixing"); | |
ac27a0ec DK |
1726 | return 0; |
1727 | } | |
1728 | ||
1729 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1730 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1731 | "not specified"); | |
ac27a0ec DK |
1732 | return 0; |
1733 | } | |
1734 | } else { | |
1735 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1736 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1737 | "specified with no journaling " |
b31e1552 | 1738 | "enabled"); |
ac27a0ec DK |
1739 | return 0; |
1740 | } | |
1741 | } | |
1742 | #endif | |
1743 | return 1; | |
1744 | } | |
1745 | ||
617ba13b | 1746 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1747 | int read_only) |
1748 | { | |
617ba13b | 1749 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1750 | int res = 0; |
1751 | ||
617ba13b | 1752 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1753 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1754 | "forcing read-only mode"); | |
ac27a0ec DK |
1755 | res = MS_RDONLY; |
1756 | } | |
1757 | if (read_only) | |
1758 | return res; | |
617ba13b | 1759 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1760 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1761 | "running e2fsck is recommended"); | |
617ba13b | 1762 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1763 | ext4_msg(sb, KERN_WARNING, |
1764 | "warning: mounting fs with errors, " | |
1765 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1766 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1767 | le16_to_cpu(es->s_mnt_count) >= | |
1768 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1769 | ext4_msg(sb, KERN_WARNING, |
1770 | "warning: maximal mount count reached, " | |
1771 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1772 | else if (le32_to_cpu(es->s_checkinterval) && |
1773 | (le32_to_cpu(es->s_lastcheck) + | |
1774 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1775 | ext4_msg(sb, KERN_WARNING, |
1776 | "warning: checktime reached, " | |
1777 | "running e2fsck is recommended"); | |
0b8e58a1 | 1778 | if (!sbi->s_journal) |
0390131b | 1779 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1780 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1781 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1782 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1783 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1784 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1785 | if (sbi->s_journal) |
1786 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1787 | |
e2d67052 | 1788 | ext4_commit_super(sb, 1); |
ac27a0ec | 1789 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1790 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
7f4520cc | 1791 | "bpg=%lu, ipg=%lu, mo=%04x]\n", |
ac27a0ec DK |
1792 | sb->s_blocksize, |
1793 | sbi->s_groups_count, | |
617ba13b MC |
1794 | EXT4_BLOCKS_PER_GROUP(sb), |
1795 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1796 | sbi->s_mount_opt); |
1797 | ||
ac27a0ec DK |
1798 | return res; |
1799 | } | |
1800 | ||
772cb7c8 JS |
1801 | static int ext4_fill_flex_info(struct super_block *sb) |
1802 | { | |
1803 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1804 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1805 | ext4_group_t flex_group_count; |
1806 | ext4_group_t flex_group; | |
1807 | int groups_per_flex = 0; | |
c5ca7c76 | 1808 | size_t size; |
772cb7c8 JS |
1809 | int i; |
1810 | ||
503358ae TT |
1811 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1812 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1813 | ||
1814 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1815 | sbi->s_log_groups_per_flex = 0; |
1816 | return 1; | |
1817 | } | |
1818 | ||
c62a11fd FB |
1819 | /* We allocate both existing and potentially added groups */ |
1820 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1821 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1822 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1823 | size = flex_group_count * sizeof(struct flex_groups); |
1824 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1825 | if (sbi->s_flex_groups == NULL) { | |
1826 | sbi->s_flex_groups = vmalloc(size); | |
1827 | if (sbi->s_flex_groups) | |
1828 | memset(sbi->s_flex_groups, 0, size); | |
1829 | } | |
772cb7c8 | 1830 | if (sbi->s_flex_groups == NULL) { |
b31e1552 ES |
1831 | ext4_msg(sb, KERN_ERR, "not enough memory for " |
1832 | "%u flex groups", flex_group_count); | |
772cb7c8 JS |
1833 | goto failed; |
1834 | } | |
772cb7c8 | 1835 | |
772cb7c8 | 1836 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1837 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1838 | |
1839 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1840 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1841 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1842 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1843 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1844 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1845 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1846 | } |
1847 | ||
1848 | return 1; | |
1849 | failed: | |
1850 | return 0; | |
1851 | } | |
1852 | ||
717d50e4 AD |
1853 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1854 | struct ext4_group_desc *gdp) | |
1855 | { | |
1856 | __u16 crc = 0; | |
1857 | ||
1858 | if (sbi->s_es->s_feature_ro_compat & | |
1859 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1860 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1861 | __le32 le_group = cpu_to_le32(block_group); | |
1862 | ||
1863 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1864 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1865 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1866 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1867 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1868 | if ((sbi->s_es->s_feature_incompat & | |
1869 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1870 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1871 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1872 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1873 | offset); | |
1874 | } | |
1875 | ||
1876 | return cpu_to_le16(crc); | |
1877 | } | |
1878 | ||
1879 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1880 | struct ext4_group_desc *gdp) | |
1881 | { | |
1882 | if ((sbi->s_es->s_feature_ro_compat & | |
1883 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1884 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1885 | return 0; | |
1886 | ||
1887 | return 1; | |
1888 | } | |
1889 | ||
ac27a0ec | 1890 | /* Called at mount-time, super-block is locked */ |
197cd65a | 1891 | static int ext4_check_descriptors(struct super_block *sb) |
ac27a0ec | 1892 | { |
617ba13b MC |
1893 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1894 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1895 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1896 | ext4_fsblk_t block_bitmap; |
1897 | ext4_fsblk_t inode_bitmap; | |
1898 | ext4_fsblk_t inode_table; | |
ce421581 | 1899 | int flexbg_flag = 0; |
fd2d4291 | 1900 | ext4_group_t i; |
ac27a0ec | 1901 | |
ce421581 JS |
1902 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
1903 | flexbg_flag = 1; | |
1904 | ||
af5bc92d | 1905 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 1906 | |
197cd65a AM |
1907 | for (i = 0; i < sbi->s_groups_count; i++) { |
1908 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
1909 | ||
ce421581 | 1910 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 1911 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
1912 | else |
1913 | last_block = first_block + | |
617ba13b | 1914 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 1915 | |
8fadc143 | 1916 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 1917 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 1918 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1919 | "Block bitmap for group %u not in group " |
b31e1552 | 1920 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
1921 | return 0; |
1922 | } | |
8fadc143 | 1923 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 1924 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 1925 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1926 | "Inode bitmap for group %u not in group " |
b31e1552 | 1927 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
1928 | return 0; |
1929 | } | |
8fadc143 | 1930 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 1931 | if (inode_table < first_block || |
2b2d6d01 | 1932 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 1933 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 1934 | "Inode table for group %u not in group " |
b31e1552 | 1935 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
1936 | return 0; |
1937 | } | |
955ce5f5 | 1938 | ext4_lock_group(sb, i); |
717d50e4 | 1939 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
1940 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
1941 | "Checksum for group %u failed (%u!=%u)", | |
1942 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
1943 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 1944 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 1945 | ext4_unlock_group(sb, i); |
8a266467 | 1946 | return 0; |
7ee1ec4c | 1947 | } |
717d50e4 | 1948 | } |
955ce5f5 | 1949 | ext4_unlock_group(sb, i); |
ce421581 JS |
1950 | if (!flexbg_flag) |
1951 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec DK |
1952 | } |
1953 | ||
bd81d8ee | 1954 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 1955 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
1956 | return 1; |
1957 | } | |
1958 | ||
617ba13b | 1959 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
1960 | * the superblock) which were deleted from all directories, but held open by |
1961 | * a process at the time of a crash. We walk the list and try to delete these | |
1962 | * inodes at recovery time (only with a read-write filesystem). | |
1963 | * | |
1964 | * In order to keep the orphan inode chain consistent during traversal (in | |
1965 | * case of crash during recovery), we link each inode into the superblock | |
1966 | * orphan list_head and handle it the same way as an inode deletion during | |
1967 | * normal operation (which journals the operations for us). | |
1968 | * | |
1969 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
1970 | * accidentally point at an in-use or already deleted inode. The worst that | |
1971 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 1972 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
1973 | * e2fsck was run on this filesystem, and it must have already done the orphan |
1974 | * inode cleanup for us, so we can safely abort without any further action. | |
1975 | */ | |
2b2d6d01 TT |
1976 | static void ext4_orphan_cleanup(struct super_block *sb, |
1977 | struct ext4_super_block *es) | |
ac27a0ec DK |
1978 | { |
1979 | unsigned int s_flags = sb->s_flags; | |
1980 | int nr_orphans = 0, nr_truncates = 0; | |
1981 | #ifdef CONFIG_QUOTA | |
1982 | int i; | |
1983 | #endif | |
1984 | if (!es->s_last_orphan) { | |
1985 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
1986 | return; | |
1987 | } | |
1988 | ||
a8f48a95 | 1989 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
1990 | ext4_msg(sb, KERN_ERR, "write access " |
1991 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
1992 | return; |
1993 | } | |
1994 | ||
617ba13b | 1995 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
1996 | if (es->s_last_orphan) |
1997 | jbd_debug(1, "Errors on filesystem, " | |
1998 | "clearing orphan list.\n"); | |
1999 | es->s_last_orphan = 0; | |
2000 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2001 | return; | |
2002 | } | |
2003 | ||
2004 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2005 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2006 | sb->s_flags &= ~MS_RDONLY; |
2007 | } | |
2008 | #ifdef CONFIG_QUOTA | |
2009 | /* Needed for iput() to work correctly and not trash data */ | |
2010 | sb->s_flags |= MS_ACTIVE; | |
2011 | /* Turn on quotas so that they are updated correctly */ | |
2012 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2013 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2014 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2015 | if (ret < 0) |
b31e1552 ES |
2016 | ext4_msg(sb, KERN_ERR, |
2017 | "Cannot turn on journaled " | |
2018 | "quota: error %d", ret); | |
ac27a0ec DK |
2019 | } |
2020 | } | |
2021 | #endif | |
2022 | ||
2023 | while (es->s_last_orphan) { | |
2024 | struct inode *inode; | |
2025 | ||
97bd42b9 JB |
2026 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2027 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2028 | es->s_last_orphan = 0; |
2029 | break; | |
2030 | } | |
2031 | ||
617ba13b | 2032 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2033 | dquot_initialize(inode); |
ac27a0ec | 2034 | if (inode->i_nlink) { |
b31e1552 ES |
2035 | ext4_msg(sb, KERN_DEBUG, |
2036 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2037 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2038 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2039 | inode->i_ino, inode->i_size); |
617ba13b | 2040 | ext4_truncate(inode); |
ac27a0ec DK |
2041 | nr_truncates++; |
2042 | } else { | |
b31e1552 ES |
2043 | ext4_msg(sb, KERN_DEBUG, |
2044 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2045 | __func__, inode->i_ino); |
ac27a0ec DK |
2046 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2047 | inode->i_ino); | |
2048 | nr_orphans++; | |
2049 | } | |
2050 | iput(inode); /* The delete magic happens here! */ | |
2051 | } | |
2052 | ||
2b2d6d01 | 2053 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2054 | |
2055 | if (nr_orphans) | |
b31e1552 ES |
2056 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2057 | PLURAL(nr_orphans)); | |
ac27a0ec | 2058 | if (nr_truncates) |
b31e1552 ES |
2059 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2060 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2061 | #ifdef CONFIG_QUOTA |
2062 | /* Turn quotas off */ | |
2063 | for (i = 0; i < MAXQUOTAS; i++) { | |
2064 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2065 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2066 | } |
2067 | #endif | |
2068 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2069 | } | |
0b8e58a1 | 2070 | |
cd2291a4 ES |
2071 | /* |
2072 | * Maximal extent format file size. | |
2073 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2074 | * extent format containers, within a sector_t, and within i_blocks | |
2075 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2076 | * so that won't be a limiting factor. | |
2077 | * | |
2078 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2079 | */ | |
f287a1a5 | 2080 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2081 | { |
2082 | loff_t res; | |
2083 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2084 | ||
2085 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2086 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2087 | /* |
90c699a9 | 2088 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2089 | * i_block represent total blocks in 512 bytes |
2090 | * 32 == size of vfs inode i_blocks * 8 | |
2091 | */ | |
2092 | upper_limit = (1LL << 32) - 1; | |
2093 | ||
2094 | /* total blocks in file system block size */ | |
2095 | upper_limit >>= (blkbits - 9); | |
2096 | upper_limit <<= blkbits; | |
2097 | } | |
2098 | ||
2099 | /* 32-bit extent-start container, ee_block */ | |
2100 | res = 1LL << 32; | |
2101 | res <<= blkbits; | |
2102 | res -= 1; | |
2103 | ||
2104 | /* Sanity check against vm- & vfs- imposed limits */ | |
2105 | if (res > upper_limit) | |
2106 | res = upper_limit; | |
2107 | ||
2108 | return res; | |
2109 | } | |
ac27a0ec | 2110 | |
ac27a0ec | 2111 | /* |
cd2291a4 | 2112 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2113 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2114 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2115 | */ |
f287a1a5 | 2116 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2117 | { |
617ba13b | 2118 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2119 | int meta_blocks; |
2120 | loff_t upper_limit; | |
0b8e58a1 AD |
2121 | /* This is calculated to be the largest file size for a dense, block |
2122 | * mapped file such that the file's total number of 512-byte sectors, | |
2123 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2124 | * | |
2125 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2126 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2127 | */ |
2128 | ||
f287a1a5 | 2129 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2130 | /* |
90c699a9 | 2131 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2132 | * the inode i_block field represents total file blocks in |
2133 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2134 | */ |
2135 | upper_limit = (1LL << 32) - 1; | |
2136 | ||
2137 | /* total blocks in file system block size */ | |
2138 | upper_limit >>= (bits - 9); | |
2139 | ||
2140 | } else { | |
8180a562 AK |
2141 | /* |
2142 | * We use 48 bit ext4_inode i_blocks | |
2143 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2144 | * represent total number of blocks in | |
2145 | * file system block size | |
2146 | */ | |
0fc1b451 AK |
2147 | upper_limit = (1LL << 48) - 1; |
2148 | ||
0fc1b451 AK |
2149 | } |
2150 | ||
2151 | /* indirect blocks */ | |
2152 | meta_blocks = 1; | |
2153 | /* double indirect blocks */ | |
2154 | meta_blocks += 1 + (1LL << (bits-2)); | |
2155 | /* tripple indirect blocks */ | |
2156 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2157 | ||
2158 | upper_limit -= meta_blocks; | |
2159 | upper_limit <<= bits; | |
ac27a0ec DK |
2160 | |
2161 | res += 1LL << (bits-2); | |
2162 | res += 1LL << (2*(bits-2)); | |
2163 | res += 1LL << (3*(bits-2)); | |
2164 | res <<= bits; | |
2165 | if (res > upper_limit) | |
2166 | res = upper_limit; | |
0fc1b451 AK |
2167 | |
2168 | if (res > MAX_LFS_FILESIZE) | |
2169 | res = MAX_LFS_FILESIZE; | |
2170 | ||
ac27a0ec DK |
2171 | return res; |
2172 | } | |
2173 | ||
617ba13b | 2174 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2175 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2176 | { |
617ba13b | 2177 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2178 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2179 | int has_super = 0; |
2180 | ||
2181 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2182 | ||
617ba13b | 2183 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2184 | nr < first_meta_bg) |
70bbb3e0 | 2185 | return logical_sb_block + nr + 1; |
ac27a0ec | 2186 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2187 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2188 | has_super = 1; |
0b8e58a1 | 2189 | |
617ba13b | 2190 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2191 | } |
2192 | ||
c9de560d AT |
2193 | /** |
2194 | * ext4_get_stripe_size: Get the stripe size. | |
2195 | * @sbi: In memory super block info | |
2196 | * | |
2197 | * If we have specified it via mount option, then | |
2198 | * use the mount option value. If the value specified at mount time is | |
2199 | * greater than the blocks per group use the super block value. | |
2200 | * If the super block value is greater than blocks per group return 0. | |
2201 | * Allocator needs it be less than blocks per group. | |
2202 | * | |
2203 | */ | |
2204 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2205 | { | |
2206 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2207 | unsigned long stripe_width = | |
2208 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2209 | ||
2210 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2211 | return sbi->s_stripe; | |
2212 | ||
2213 | if (stripe_width <= sbi->s_blocks_per_group) | |
2214 | return stripe_width; | |
2215 | ||
2216 | if (stride <= sbi->s_blocks_per_group) | |
2217 | return stride; | |
2218 | ||
2219 | return 0; | |
2220 | } | |
ac27a0ec | 2221 | |
3197ebdb TT |
2222 | /* sysfs supprt */ |
2223 | ||
2224 | struct ext4_attr { | |
2225 | struct attribute attr; | |
2226 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2227 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2228 | const char *, size_t); |
2229 | int offset; | |
2230 | }; | |
2231 | ||
2232 | static int parse_strtoul(const char *buf, | |
2233 | unsigned long max, unsigned long *value) | |
2234 | { | |
2235 | char *endp; | |
2236 | ||
e7d2860b AGR |
2237 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2238 | endp = skip_spaces(endp); | |
3197ebdb TT |
2239 | if (*endp || *value > max) |
2240 | return -EINVAL; | |
2241 | ||
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2246 | struct ext4_sb_info *sbi, | |
2247 | char *buf) | |
2248 | { | |
2249 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2250 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2251 | } | |
2252 | ||
2253 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2254 | struct ext4_sb_info *sbi, char *buf) | |
2255 | { | |
2256 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2257 | ||
2258 | return snprintf(buf, PAGE_SIZE, "%lu\n", | |
2259 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2260 | sbi->s_sectors_written_start) >> 1); | |
2261 | } | |
2262 | ||
2263 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2264 | struct ext4_sb_info *sbi, char *buf) | |
2265 | { | |
2266 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2267 | ||
2268 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
a6b43e38 | 2269 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2270 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2271 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2272 | } |
2273 | ||
2274 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2275 | struct ext4_sb_info *sbi, | |
2276 | const char *buf, size_t count) | |
2277 | { | |
2278 | unsigned long t; | |
2279 | ||
2280 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2281 | return -EINVAL; | |
2282 | ||
f7c43950 | 2283 | if (!is_power_of_2(t)) |
3197ebdb TT |
2284 | return -EINVAL; |
2285 | ||
2286 | sbi->s_inode_readahead_blks = t; | |
2287 | return count; | |
2288 | } | |
2289 | ||
2290 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2291 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2292 | { |
2293 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2294 | ||
2295 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2296 | } | |
2297 | ||
2298 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2299 | struct ext4_sb_info *sbi, | |
2300 | const char *buf, size_t count) | |
2301 | { | |
2302 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2303 | unsigned long t; | |
2304 | ||
2305 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2306 | return -EINVAL; | |
2307 | *ui = t; | |
2308 | return count; | |
2309 | } | |
2310 | ||
2311 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2312 | static struct ext4_attr ext4_attr_##_name = { \ | |
2313 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2314 | .show = _show, \ | |
2315 | .store = _store, \ | |
2316 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2317 | } | |
2318 | #define EXT4_ATTR(name, mode, show, store) \ | |
2319 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2320 | ||
2321 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) | |
2322 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2323 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2324 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2325 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2326 | ||
2327 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2328 | EXT4_RO_ATTR(session_write_kbytes); | |
2329 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2330 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2331 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2332 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2333 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2334 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2335 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2336 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2337 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2338 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2339 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2340 | |
2341 | static struct attribute *ext4_attrs[] = { | |
2342 | ATTR_LIST(delayed_allocation_blocks), | |
2343 | ATTR_LIST(session_write_kbytes), | |
2344 | ATTR_LIST(lifetime_write_kbytes), | |
2345 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2346 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2347 | ATTR_LIST(mb_stats), |
2348 | ATTR_LIST(mb_max_to_scan), | |
2349 | ATTR_LIST(mb_min_to_scan), | |
2350 | ATTR_LIST(mb_order2_req), | |
2351 | ATTR_LIST(mb_stream_req), | |
2352 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2353 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2354 | NULL, |
2355 | }; | |
2356 | ||
2357 | static ssize_t ext4_attr_show(struct kobject *kobj, | |
2358 | struct attribute *attr, char *buf) | |
2359 | { | |
2360 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2361 | s_kobj); | |
2362 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2363 | ||
2364 | return a->show ? a->show(a, sbi, buf) : 0; | |
2365 | } | |
2366 | ||
2367 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2368 | struct attribute *attr, | |
2369 | const char *buf, size_t len) | |
2370 | { | |
2371 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2372 | s_kobj); | |
2373 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2374 | ||
2375 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2376 | } | |
2377 | ||
2378 | static void ext4_sb_release(struct kobject *kobj) | |
2379 | { | |
2380 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2381 | s_kobj); | |
2382 | complete(&sbi->s_kobj_unregister); | |
2383 | } | |
2384 | ||
2385 | ||
52cf25d0 | 2386 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2387 | .show = ext4_attr_show, |
2388 | .store = ext4_attr_store, | |
2389 | }; | |
2390 | ||
2391 | static struct kobj_type ext4_ktype = { | |
2392 | .default_attrs = ext4_attrs, | |
2393 | .sysfs_ops = &ext4_attr_ops, | |
2394 | .release = ext4_sb_release, | |
2395 | }; | |
2396 | ||
a13fb1a4 ES |
2397 | /* |
2398 | * Check whether this filesystem can be mounted based on | |
2399 | * the features present and the RDONLY/RDWR mount requested. | |
2400 | * Returns 1 if this filesystem can be mounted as requested, | |
2401 | * 0 if it cannot be. | |
2402 | */ | |
2403 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2404 | { | |
2405 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2406 | ext4_msg(sb, KERN_ERR, | |
2407 | "Couldn't mount because of " | |
2408 | "unsupported optional features (%x)", | |
2409 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2410 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | if (readonly) | |
2415 | return 1; | |
2416 | ||
2417 | /* Check that feature set is OK for a read-write mount */ | |
2418 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2419 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2420 | "unsupported optional features (%x)", | |
2421 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2422 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2423 | return 0; | |
2424 | } | |
2425 | /* | |
2426 | * Large file size enabled file system can only be mounted | |
2427 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2428 | */ | |
2429 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2430 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2431 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2432 | "cannot be mounted RDWR without " | |
2433 | "CONFIG_LBDAF"); | |
2434 | return 0; | |
2435 | } | |
2436 | } | |
2437 | return 1; | |
2438 | } | |
2439 | ||
2b2d6d01 | 2440 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2441 | __releases(kernel_lock) |
2442 | __acquires(kernel_lock) | |
ac27a0ec | 2443 | { |
d4c402d9 | 2444 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 2445 | struct buffer_head *bh; |
617ba13b MC |
2446 | struct ext4_super_block *es = NULL; |
2447 | struct ext4_sb_info *sbi; | |
2448 | ext4_fsblk_t block; | |
2449 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2450 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2451 | unsigned long offset = 0; |
ac27a0ec DK |
2452 | unsigned long journal_devnum = 0; |
2453 | unsigned long def_mount_opts; | |
2454 | struct inode *root; | |
9f6200bb | 2455 | char *cp; |
0390131b | 2456 | const char *descr; |
1d1fe1ee | 2457 | int ret = -EINVAL; |
ac27a0ec | 2458 | int blocksize; |
4ec11028 TT |
2459 | unsigned int db_count; |
2460 | unsigned int i; | |
f287a1a5 | 2461 | int needs_recovery, has_huge_files; |
bd81d8ee | 2462 | __u64 blocks_count; |
833f4077 | 2463 | int err; |
b3881f74 | 2464 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
2465 | |
2466 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
2467 | if (!sbi) | |
2468 | return -ENOMEM; | |
705895b6 PE |
2469 | |
2470 | sbi->s_blockgroup_lock = | |
2471 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
2472 | if (!sbi->s_blockgroup_lock) { | |
2473 | kfree(sbi); | |
2474 | return -ENOMEM; | |
2475 | } | |
ac27a0ec DK |
2476 | sb->s_fs_info = sbi; |
2477 | sbi->s_mount_opt = 0; | |
617ba13b MC |
2478 | sbi->s_resuid = EXT4_DEF_RESUID; |
2479 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 2480 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 2481 | sbi->s_sb_block = sb_block; |
afc32f7e TT |
2482 | sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, |
2483 | sectors[1]); | |
ac27a0ec DK |
2484 | |
2485 | unlock_kernel(); | |
2486 | ||
9f6200bb TT |
2487 | /* Cleanup superblock name */ |
2488 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
2489 | *cp = '!'; | |
2490 | ||
617ba13b | 2491 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 2492 | if (!blocksize) { |
b31e1552 | 2493 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
2494 | goto out_fail; |
2495 | } | |
2496 | ||
2497 | /* | |
617ba13b | 2498 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
2499 | * block sizes. We need to calculate the offset from buffer start. |
2500 | */ | |
617ba13b | 2501 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
2502 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2503 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 2504 | } else { |
70bbb3e0 | 2505 | logical_sb_block = sb_block; |
ac27a0ec DK |
2506 | } |
2507 | ||
70bbb3e0 | 2508 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 2509 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
2510 | goto out_fail; |
2511 | } | |
2512 | /* | |
2513 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 2514 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 2515 | */ |
617ba13b | 2516 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
2517 | sbi->s_es = es; |
2518 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
2519 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
2520 | goto cantfind_ext4; | |
afc32f7e | 2521 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
2522 | |
2523 | /* Set defaults before we parse the mount options */ | |
2524 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
617ba13b | 2525 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 2526 | set_opt(sbi->s_mount_opt, DEBUG); |
437ca0fd DM |
2527 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
2528 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
2529 | "2.6.38"); | |
ac27a0ec | 2530 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 2531 | } |
617ba13b | 2532 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 2533 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 2534 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 2535 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 2536 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 2537 | #endif |
03010a33 | 2538 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 2539 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 2540 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 2541 | #endif |
617ba13b | 2542 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
482a7425 | 2543 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
617ba13b | 2544 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
482a7425 | 2545 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
617ba13b | 2546 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
482a7425 | 2547 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
617ba13b MC |
2548 | |
2549 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 2550 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 2551 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 2552 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
2553 | else |
2554 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
2555 | |
2556 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
2557 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
2558 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
2559 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
2560 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 2561 | |
571640ca | 2562 | set_opt(sbi->s_mount_opt, BARRIER); |
ac27a0ec | 2563 | |
dd919b98 AK |
2564 | /* |
2565 | * enable delayed allocation by default | |
2566 | * Use -o nodelalloc to turn it off | |
2567 | */ | |
ba69f9ab JK |
2568 | if (!IS_EXT3_SB(sb)) |
2569 | set_opt(sbi->s_mount_opt, DELALLOC); | |
dd919b98 | 2570 | |
b3881f74 TT |
2571 | if (!parse_options((char *) data, sb, &journal_devnum, |
2572 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
2573 | goto failed_mount; |
2574 | ||
2575 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 2576 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 2577 | |
617ba13b MC |
2578 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
2579 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
2580 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
2581 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
2582 | ext4_msg(sb, KERN_WARNING, |
2583 | "feature flags set on rev 0 fs, " | |
2584 | "running e2fsck is recommended"); | |
469108ff | 2585 | |
ac27a0ec DK |
2586 | /* |
2587 | * Check feature flags regardless of the revision level, since we | |
2588 | * previously didn't change the revision level when setting the flags, | |
2589 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
2590 | */ | |
a13fb1a4 | 2591 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 2592 | goto failed_mount; |
a13fb1a4 | 2593 | |
ac27a0ec DK |
2594 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
2595 | ||
617ba13b MC |
2596 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
2597 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
2598 | ext4_msg(sb, KERN_ERR, |
2599 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
2600 | goto failed_mount; |
2601 | } | |
2602 | ||
ac27a0ec | 2603 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
2604 | /* Validate the filesystem blocksize */ |
2605 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 2606 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 2607 | blocksize); |
ac27a0ec DK |
2608 | goto failed_mount; |
2609 | } | |
2610 | ||
2b2d6d01 | 2611 | brelse(bh); |
70bbb3e0 AM |
2612 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
2613 | offset = do_div(logical_sb_block, blocksize); | |
2614 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 2615 | if (!bh) { |
b31e1552 ES |
2616 | ext4_msg(sb, KERN_ERR, |
2617 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
2618 | goto failed_mount; |
2619 | } | |
617ba13b | 2620 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 2621 | sbi->s_es = es; |
617ba13b | 2622 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
2623 | ext4_msg(sb, KERN_ERR, |
2624 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
2625 | goto failed_mount; |
2626 | } | |
2627 | } | |
2628 | ||
a13fb1a4 ES |
2629 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
2630 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
2631 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
2632 | has_huge_files); | |
2633 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 2634 | |
617ba13b MC |
2635 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
2636 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
2637 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
2638 | } else { |
2639 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
2640 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 2641 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 2642 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 2643 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
2644 | ext4_msg(sb, KERN_ERR, |
2645 | "unsupported inode size: %d", | |
2b2d6d01 | 2646 | sbi->s_inode_size); |
ac27a0ec DK |
2647 | goto failed_mount; |
2648 | } | |
ef7f3835 KS |
2649 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
2650 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 2651 | } |
0b8e58a1 | 2652 | |
0d1ee42f AR |
2653 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
2654 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 2655 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 2656 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 2657 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
2658 | ext4_msg(sb, KERN_ERR, |
2659 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
2660 | sbi->s_desc_size); |
2661 | goto failed_mount; | |
2662 | } | |
2663 | } else | |
2664 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 2665 | |
ac27a0ec | 2666 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 2667 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 2668 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 2669 | goto cantfind_ext4; |
0b8e58a1 | 2670 | |
617ba13b | 2671 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 2672 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 2673 | goto cantfind_ext4; |
ac27a0ec DK |
2674 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
2675 | sbi->s_inodes_per_block; | |
0d1ee42f | 2676 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
2677 | sbi->s_sbh = bh; |
2678 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
2679 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
2680 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 2681 | |
2b2d6d01 | 2682 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
2683 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
2684 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
2685 | i = le32_to_cpu(es->s_flags); |
2686 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
2687 | sbi->s_hash_unsigned = 3; | |
2688 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
2689 | #ifdef __CHAR_UNSIGNED__ | |
2690 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
2691 | sbi->s_hash_unsigned = 3; | |
2692 | #else | |
2693 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
2694 | #endif | |
2695 | sb->s_dirt = 1; | |
2696 | } | |
ac27a0ec DK |
2697 | |
2698 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
2699 | ext4_msg(sb, KERN_ERR, |
2700 | "#blocks per group too big: %lu", | |
2b2d6d01 | 2701 | sbi->s_blocks_per_group); |
ac27a0ec DK |
2702 | goto failed_mount; |
2703 | } | |
ac27a0ec | 2704 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
2705 | ext4_msg(sb, KERN_ERR, |
2706 | "#inodes per group too big: %lu", | |
2b2d6d01 | 2707 | sbi->s_inodes_per_group); |
ac27a0ec DK |
2708 | goto failed_mount; |
2709 | } | |
2710 | ||
bf43d84b ES |
2711 | /* |
2712 | * Test whether we have more sectors than will fit in sector_t, | |
2713 | * and whether the max offset is addressable by the page cache. | |
2714 | */ | |
2715 | if ((ext4_blocks_count(es) > | |
2716 | (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || | |
2717 | (ext4_blocks_count(es) > | |
2718 | (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { | |
b31e1552 | 2719 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 2720 | " too large to mount safely on this system"); |
ac27a0ec | 2721 | if (sizeof(sector_t) < 8) |
90c699a9 | 2722 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
bf43d84b | 2723 | ret = -EFBIG; |
ac27a0ec DK |
2724 | goto failed_mount; |
2725 | } | |
2726 | ||
617ba13b MC |
2727 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
2728 | goto cantfind_ext4; | |
e7c95593 | 2729 | |
0f2ddca6 FTN |
2730 | /* check blocks count against device size */ |
2731 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
2732 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
2733 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
2734 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
2735 | ext4_blocks_count(es), blocks_count); |
2736 | goto failed_mount; | |
2737 | } | |
2738 | ||
0b8e58a1 AD |
2739 | /* |
2740 | * It makes no sense for the first data block to be beyond the end | |
2741 | * of the filesystem. | |
2742 | */ | |
2743 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
2744 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
2745 | "block %u is beyond end of filesystem (%llu)", | |
2746 | le32_to_cpu(es->s_first_data_block), | |
2747 | ext4_blocks_count(es)); | |
e7c95593 ES |
2748 | goto failed_mount; |
2749 | } | |
bd81d8ee LV |
2750 | blocks_count = (ext4_blocks_count(es) - |
2751 | le32_to_cpu(es->s_first_data_block) + | |
2752 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
2753 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 2754 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 2755 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 2756 | "(block count %llu, first data block %u, " |
b31e1552 | 2757 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
2758 | ext4_blocks_count(es), |
2759 | le32_to_cpu(es->s_first_data_block), | |
2760 | EXT4_BLOCKS_PER_GROUP(sb)); | |
2761 | goto failed_mount; | |
2762 | } | |
bd81d8ee | 2763 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
2764 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
2765 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
2766 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
2767 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 2768 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
2769 | GFP_KERNEL); |
2770 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 2771 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
2772 | goto failed_mount; |
2773 | } | |
2774 | ||
3244fcb1 | 2775 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
2776 | if (ext4_proc_root) |
2777 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 2778 | #endif |
240799cd | 2779 | |
705895b6 | 2780 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
2781 | |
2782 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 2783 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
2784 | sbi->s_group_desc[i] = sb_bread(sb, block); |
2785 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
2786 | ext4_msg(sb, KERN_ERR, |
2787 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
2788 | db_count = i; |
2789 | goto failed_mount2; | |
2790 | } | |
2791 | } | |
2b2d6d01 | 2792 | if (!ext4_check_descriptors(sb)) { |
b31e1552 | 2793 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
2794 | goto failed_mount2; |
2795 | } | |
772cb7c8 JS |
2796 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2797 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
2798 | ext4_msg(sb, KERN_ERR, |
2799 | "unable to initialize " | |
2800 | "flex_bg meta info!"); | |
772cb7c8 JS |
2801 | goto failed_mount2; |
2802 | } | |
2803 | ||
ac27a0ec DK |
2804 | sbi->s_gdb_count = db_count; |
2805 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
2806 | spin_lock_init(&sbi->s_next_gen_lock); | |
2807 | ||
c9de560d | 2808 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 2809 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 2810 | |
ac27a0ec DK |
2811 | /* |
2812 | * set up enough so that it can read an inode | |
2813 | */ | |
9ca92389 TT |
2814 | if (!test_opt(sb, NOLOAD) && |
2815 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
2816 | sb->s_op = &ext4_sops; | |
2817 | else | |
2818 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
2819 | sb->s_export_op = &ext4_export_ops; |
2820 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 2821 | #ifdef CONFIG_QUOTA |
617ba13b MC |
2822 | sb->s_qcop = &ext4_qctl_operations; |
2823 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
2824 | #endif |
2825 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 2826 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 2827 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
2828 | |
2829 | sb->s_root = NULL; | |
2830 | ||
2831 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
2832 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
2833 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
2834 | |
2835 | /* | |
2836 | * The first inode we look at is the journal inode. Don't try | |
2837 | * root first: it may be modified in the journal! | |
2838 | */ | |
2839 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
2840 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
2841 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 2842 | goto failed_mount3; |
0390131b FM |
2843 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
2844 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
2845 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
2846 | "suppressed and not mounted read-only"); | |
744692dc | 2847 | goto failed_mount_wq; |
ac27a0ec | 2848 | } else { |
0390131b FM |
2849 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
2850 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
2851 | sbi->s_journal = NULL; | |
2852 | needs_recovery = 0; | |
2853 | goto no_journal; | |
ac27a0ec DK |
2854 | } |
2855 | ||
eb40a09c JS |
2856 | if (ext4_blocks_count(es) > 0xffffffffULL && |
2857 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
2858 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 2859 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 2860 | goto failed_mount_wq; |
eb40a09c JS |
2861 | } |
2862 | ||
d4da6c9c LT |
2863 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
2864 | jbd2_journal_set_features(sbi->s_journal, | |
2865 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 2866 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
2867 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
2868 | jbd2_journal_set_features(sbi->s_journal, | |
2869 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
2870 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
2871 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
2872 | } else { |
2873 | jbd2_journal_clear_features(sbi->s_journal, | |
2874 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
2875 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
2876 | } | |
818d276c | 2877 | |
ac27a0ec DK |
2878 | /* We have now updated the journal if required, so we can |
2879 | * validate the data journaling mode. */ | |
2880 | switch (test_opt(sb, DATA_FLAGS)) { | |
2881 | case 0: | |
2882 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
2883 | * capabilities: ORDERED_DATA if the journal can |
2884 | * cope, else JOURNAL_DATA | |
2885 | */ | |
dab291af MC |
2886 | if (jbd2_journal_check_available_features |
2887 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
2888 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
2889 | else | |
2890 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
2891 | break; | |
2892 | ||
617ba13b MC |
2893 | case EXT4_MOUNT_ORDERED_DATA: |
2894 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
2895 | if (!jbd2_journal_check_available_features |
2896 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
2897 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
2898 | "requested data journaling mode"); | |
744692dc | 2899 | goto failed_mount_wq; |
ac27a0ec DK |
2900 | } |
2901 | default: | |
2902 | break; | |
2903 | } | |
b3881f74 | 2904 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 2905 | |
0390131b | 2906 | no_journal: |
84061e07 DM |
2907 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
2908 | ext4_count_free_blocks(sb)); | |
2909 | if (!err) | |
2910 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
2911 | ext4_count_free_inodes(sb)); | |
2912 | if (!err) | |
2913 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
2914 | ext4_count_dirs(sb)); | |
2915 | if (!err) | |
2916 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
2917 | if (err) { | |
2918 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
2919 | goto failed_mount_wq; | |
2920 | } | |
206f7ab4 | 2921 | |
4c0425ff MC |
2922 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
2923 | if (!EXT4_SB(sb)->dio_unwritten_wq) { | |
2924 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
2925 | goto failed_mount_wq; | |
2926 | } | |
2927 | ||
ac27a0ec | 2928 | /* |
dab291af | 2929 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
2930 | * so we can safely mount the rest of the filesystem now. |
2931 | */ | |
2932 | ||
1d1fe1ee DH |
2933 | root = ext4_iget(sb, EXT4_ROOT_INO); |
2934 | if (IS_ERR(root)) { | |
b31e1552 | 2935 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 2936 | ret = PTR_ERR(root); |
ac27a0ec DK |
2937 | goto failed_mount4; |
2938 | } | |
2939 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 2940 | iput(root); |
b31e1552 | 2941 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
2942 | goto failed_mount4; |
2943 | } | |
1d1fe1ee DH |
2944 | sb->s_root = d_alloc_root(root); |
2945 | if (!sb->s_root) { | |
b31e1552 | 2946 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
2947 | iput(root); |
2948 | ret = -ENOMEM; | |
2949 | goto failed_mount4; | |
2950 | } | |
ac27a0ec | 2951 | |
2b2d6d01 | 2952 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
2953 | |
2954 | /* determine the minimum size of new large inodes, if present */ | |
2955 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
2956 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2957 | EXT4_GOOD_OLD_INODE_SIZE; | |
2958 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
2959 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
2960 | if (sbi->s_want_extra_isize < | |
2961 | le16_to_cpu(es->s_want_extra_isize)) | |
2962 | sbi->s_want_extra_isize = | |
2963 | le16_to_cpu(es->s_want_extra_isize); | |
2964 | if (sbi->s_want_extra_isize < | |
2965 | le16_to_cpu(es->s_min_extra_isize)) | |
2966 | sbi->s_want_extra_isize = | |
2967 | le16_to_cpu(es->s_min_extra_isize); | |
2968 | } | |
2969 | } | |
2970 | /* Check if enough inode space is available */ | |
2971 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
2972 | sbi->s_inode_size) { | |
2973 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
2974 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
2975 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
2976 | "available"); | |
ef7f3835 KS |
2977 | } |
2978 | ||
90576c0b TT |
2979 | if (test_opt(sb, DELALLOC) && |
2980 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
2981 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
2982 | "requested data journaling mode"); | |
c2774d84 | 2983 | clear_opt(sbi->s_mount_opt, DELALLOC); |
90576c0b | 2984 | } |
744692dc JZ |
2985 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
2986 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
2987 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
2988 | "option - requested data journaling mode"); | |
2989 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
2990 | } | |
2991 | if (sb->s_blocksize < PAGE_SIZE) { | |
2992 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
2993 | "option - block size is too small"); | |
2994 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
2995 | } | |
2996 | } | |
c2774d84 | 2997 | |
6fd058f7 TT |
2998 | err = ext4_setup_system_zone(sb); |
2999 | if (err) { | |
b31e1552 | 3000 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3001 | "zone (%d)", err); |
6fd058f7 TT |
3002 | goto failed_mount4; |
3003 | } | |
3004 | ||
c2774d84 AK |
3005 | ext4_ext_init(sb); |
3006 | err = ext4_mb_init(sb, needs_recovery); | |
3007 | if (err) { | |
b31e1552 ES |
3008 | ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", |
3009 | err); | |
c2774d84 AK |
3010 | goto failed_mount4; |
3011 | } | |
3012 | ||
3197ebdb TT |
3013 | sbi->s_kobj.kset = ext4_kset; |
3014 | init_completion(&sbi->s_kobj_unregister); | |
3015 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3016 | "%s", sb->s_id); | |
3017 | if (err) { | |
3018 | ext4_mb_release(sb); | |
3019 | ext4_ext_release(sb); | |
3020 | goto failed_mount4; | |
3021 | }; | |
3022 | ||
617ba13b MC |
3023 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3024 | ext4_orphan_cleanup(sb, es); | |
3025 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3026 | if (needs_recovery) { |
b31e1552 | 3027 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3028 | ext4_mark_recovery_complete(sb, es); |
3029 | } | |
3030 | if (EXT4_SB(sb)->s_journal) { | |
3031 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3032 | descr = " journalled data mode"; | |
3033 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3034 | descr = " ordered data mode"; | |
3035 | else | |
3036 | descr = " writeback data mode"; | |
3037 | } else | |
3038 | descr = "out journal"; | |
3039 | ||
d4c402d9 CW |
3040 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
3041 | "Opts: %s", descr, orig_data); | |
ac27a0ec DK |
3042 | |
3043 | lock_kernel(); | |
d4c402d9 | 3044 | kfree(orig_data); |
ac27a0ec DK |
3045 | return 0; |
3046 | ||
617ba13b | 3047 | cantfind_ext4: |
ac27a0ec | 3048 | if (!silent) |
b31e1552 | 3049 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3050 | goto failed_mount; |
3051 | ||
3052 | failed_mount4: | |
b31e1552 | 3053 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3054 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3055 | failed_mount_wq: | |
6fd058f7 | 3056 | ext4_release_system_zone(sb); |
0390131b FM |
3057 | if (sbi->s_journal) { |
3058 | jbd2_journal_destroy(sbi->s_journal); | |
3059 | sbi->s_journal = NULL; | |
3060 | } | |
84061e07 DM |
3061 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3062 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3063 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3064 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
ac27a0ec | 3065 | failed_mount3: |
c5ca7c76 TT |
3066 | if (sbi->s_flex_groups) { |
3067 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3068 | vfree(sbi->s_flex_groups); | |
3069 | else | |
3070 | kfree(sbi->s_flex_groups); | |
3071 | } | |
ac27a0ec DK |
3072 | failed_mount2: |
3073 | for (i = 0; i < db_count; i++) | |
3074 | brelse(sbi->s_group_desc[i]); | |
3075 | kfree(sbi->s_group_desc); | |
3076 | failed_mount: | |
240799cd | 3077 | if (sbi->s_proc) { |
9f6200bb | 3078 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3079 | } |
ac27a0ec DK |
3080 | #ifdef CONFIG_QUOTA |
3081 | for (i = 0; i < MAXQUOTAS; i++) | |
3082 | kfree(sbi->s_qf_names[i]); | |
3083 | #endif | |
617ba13b | 3084 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3085 | brelse(bh); |
3086 | out_fail: | |
3087 | sb->s_fs_info = NULL; | |
f6830165 | 3088 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3089 | kfree(sbi); |
3090 | lock_kernel(); | |
d4c402d9 | 3091 | kfree(orig_data); |
1d1fe1ee | 3092 | return ret; |
ac27a0ec DK |
3093 | } |
3094 | ||
3095 | /* | |
3096 | * Setup any per-fs journal parameters now. We'll do this both on | |
3097 | * initial mount, once the journal has been initialised but before we've | |
3098 | * done any recovery; and again on any subsequent remount. | |
3099 | */ | |
617ba13b | 3100 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3101 | { |
617ba13b | 3102 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3103 | |
30773840 TT |
3104 | journal->j_commit_interval = sbi->s_commit_interval; |
3105 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3106 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3107 | |
3108 | spin_lock(&journal->j_state_lock); | |
3109 | if (test_opt(sb, BARRIER)) | |
dab291af | 3110 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3111 | else |
dab291af | 3112 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3113 | if (test_opt(sb, DATA_ERR_ABORT)) |
3114 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3115 | else | |
3116 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
ac27a0ec DK |
3117 | spin_unlock(&journal->j_state_lock); |
3118 | } | |
3119 | ||
617ba13b | 3120 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3121 | unsigned int journal_inum) |
3122 | { | |
3123 | struct inode *journal_inode; | |
3124 | journal_t *journal; | |
3125 | ||
0390131b FM |
3126 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3127 | ||
ac27a0ec DK |
3128 | /* First, test for the existence of a valid inode on disk. Bad |
3129 | * things happen if we iget() an unused inode, as the subsequent | |
3130 | * iput() will try to delete it. */ | |
3131 | ||
1d1fe1ee DH |
3132 | journal_inode = ext4_iget(sb, journal_inum); |
3133 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3134 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3135 | return NULL; |
3136 | } | |
3137 | if (!journal_inode->i_nlink) { | |
3138 | make_bad_inode(journal_inode); | |
3139 | iput(journal_inode); | |
b31e1552 | 3140 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3141 | return NULL; |
3142 | } | |
3143 | ||
e5f8eab8 | 3144 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3145 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3146 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3147 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3148 | iput(journal_inode); |
3149 | return NULL; | |
3150 | } | |
3151 | ||
dab291af | 3152 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3153 | if (!journal) { |
b31e1552 | 3154 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3155 | iput(journal_inode); |
3156 | return NULL; | |
3157 | } | |
3158 | journal->j_private = sb; | |
617ba13b | 3159 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3160 | return journal; |
3161 | } | |
3162 | ||
617ba13b | 3163 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3164 | dev_t j_dev) |
3165 | { | |
2b2d6d01 | 3166 | struct buffer_head *bh; |
ac27a0ec | 3167 | journal_t *journal; |
617ba13b MC |
3168 | ext4_fsblk_t start; |
3169 | ext4_fsblk_t len; | |
ac27a0ec | 3170 | int hblock, blocksize; |
617ba13b | 3171 | ext4_fsblk_t sb_block; |
ac27a0ec | 3172 | unsigned long offset; |
2b2d6d01 | 3173 | struct ext4_super_block *es; |
ac27a0ec DK |
3174 | struct block_device *bdev; |
3175 | ||
0390131b FM |
3176 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3177 | ||
b31e1552 | 3178 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3179 | if (bdev == NULL) |
3180 | return NULL; | |
3181 | ||
3182 | if (bd_claim(bdev, sb)) { | |
b31e1552 ES |
3183 | ext4_msg(sb, KERN_ERR, |
3184 | "failed to claim external journal device"); | |
9a1c3542 | 3185 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3186 | return NULL; |
3187 | } | |
3188 | ||
3189 | blocksize = sb->s_blocksize; | |
e1defc4f | 3190 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3191 | if (blocksize < hblock) { |
b31e1552 ES |
3192 | ext4_msg(sb, KERN_ERR, |
3193 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3194 | goto out_bdev; |
3195 | } | |
3196 | ||
617ba13b MC |
3197 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3198 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3199 | set_blocksize(bdev, blocksize); |
3200 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3201 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3202 | "external journal"); | |
ac27a0ec DK |
3203 | goto out_bdev; |
3204 | } | |
3205 | ||
617ba13b MC |
3206 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3207 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3208 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3209 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3210 | ext4_msg(sb, KERN_ERR, "external journal has " |
3211 | "bad superblock"); | |
ac27a0ec DK |
3212 | brelse(bh); |
3213 | goto out_bdev; | |
3214 | } | |
3215 | ||
617ba13b | 3216 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3217 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3218 | brelse(bh); |
3219 | goto out_bdev; | |
3220 | } | |
3221 | ||
bd81d8ee | 3222 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3223 | start = sb_block + 1; |
3224 | brelse(bh); /* we're done with the superblock */ | |
3225 | ||
dab291af | 3226 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3227 | start, len, blocksize); |
3228 | if (!journal) { | |
b31e1552 | 3229 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3230 | goto out_bdev; |
3231 | } | |
3232 | journal->j_private = sb; | |
3233 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3234 | wait_on_buffer(journal->j_sb_buffer); | |
3235 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3236 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3237 | goto out_journal; |
3238 | } | |
3239 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3240 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3241 | "user (unsupported) - %d", | |
ac27a0ec DK |
3242 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3243 | goto out_journal; | |
3244 | } | |
617ba13b MC |
3245 | EXT4_SB(sb)->journal_bdev = bdev; |
3246 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3247 | return journal; |
0b8e58a1 | 3248 | |
ac27a0ec | 3249 | out_journal: |
dab291af | 3250 | jbd2_journal_destroy(journal); |
ac27a0ec | 3251 | out_bdev: |
617ba13b | 3252 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3253 | return NULL; |
3254 | } | |
3255 | ||
617ba13b MC |
3256 | static int ext4_load_journal(struct super_block *sb, |
3257 | struct ext4_super_block *es, | |
ac27a0ec DK |
3258 | unsigned long journal_devnum) |
3259 | { | |
3260 | journal_t *journal; | |
3261 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3262 | dev_t journal_dev; | |
3263 | int err = 0; | |
3264 | int really_read_only; | |
3265 | ||
0390131b FM |
3266 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3267 | ||
ac27a0ec DK |
3268 | if (journal_devnum && |
3269 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3270 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3271 | "numbers have changed"); | |
ac27a0ec DK |
3272 | journal_dev = new_decode_dev(journal_devnum); |
3273 | } else | |
3274 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3275 | ||
3276 | really_read_only = bdev_read_only(sb->s_bdev); | |
3277 | ||
3278 | /* | |
3279 | * Are we loading a blank journal or performing recovery after a | |
3280 | * crash? For recovery, we need to check in advance whether we | |
3281 | * can get read-write access to the device. | |
3282 | */ | |
617ba13b | 3283 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3284 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3285 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3286 | "required on readonly filesystem"); | |
ac27a0ec | 3287 | if (really_read_only) { |
b31e1552 ES |
3288 | ext4_msg(sb, KERN_ERR, "write access " |
3289 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3290 | return -EROFS; |
3291 | } | |
b31e1552 ES |
3292 | ext4_msg(sb, KERN_INFO, "write access will " |
3293 | "be enabled during recovery"); | |
ac27a0ec DK |
3294 | } |
3295 | } | |
3296 | ||
3297 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3298 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3299 | "and inode journals!"); | |
ac27a0ec DK |
3300 | return -EINVAL; |
3301 | } | |
3302 | ||
3303 | if (journal_inum) { | |
617ba13b | 3304 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3305 | return -EINVAL; |
3306 | } else { | |
617ba13b | 3307 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3308 | return -EINVAL; |
3309 | } | |
3310 | ||
90576c0b | 3311 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3312 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3313 | |
ac27a0ec | 3314 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3315 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3316 | if (err) { |
b31e1552 | 3317 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3318 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3319 | return err; |
3320 | } | |
3321 | } | |
3322 | ||
617ba13b | 3323 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3324 | err = jbd2_journal_wipe(journal, !really_read_only); |
ac27a0ec | 3325 | if (!err) |
dab291af | 3326 | err = jbd2_journal_load(journal); |
ac27a0ec DK |
3327 | |
3328 | if (err) { | |
b31e1552 | 3329 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3330 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3331 | return err; |
3332 | } | |
3333 | ||
617ba13b MC |
3334 | EXT4_SB(sb)->s_journal = journal; |
3335 | ext4_clear_journal_err(sb, es); | |
ac27a0ec DK |
3336 | |
3337 | if (journal_devnum && | |
3338 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
3339 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3340 | |
3341 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3342 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3343 | } |
3344 | ||
3345 | return 0; | |
3346 | } | |
3347 | ||
e2d67052 | 3348 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3349 | { |
e2d67052 | 3350 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3351 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3352 | int error = 0; |
ac27a0ec DK |
3353 | |
3354 | if (!sbh) | |
c4be0c1d | 3355 | return error; |
914258bf TT |
3356 | if (buffer_write_io_error(sbh)) { |
3357 | /* | |
3358 | * Oh, dear. A previous attempt to write the | |
3359 | * superblock failed. This could happen because the | |
3360 | * USB device was yanked out. Or it could happen to | |
3361 | * be a transient write error and maybe the block will | |
3362 | * be remapped. Nothing we can do but to retry the | |
3363 | * write and hope for the best. | |
3364 | */ | |
b31e1552 ES |
3365 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3366 | "superblock detected"); | |
914258bf TT |
3367 | clear_buffer_write_io_error(sbh); |
3368 | set_buffer_uptodate(sbh); | |
3369 | } | |
71290b36 TT |
3370 | /* |
3371 | * If the file system is mounted read-only, don't update the | |
3372 | * superblock write time. This avoids updating the superblock | |
3373 | * write time when we are mounting the root file system | |
3374 | * read/only but we need to replay the journal; at that point, | |
3375 | * for people who are east of GMT and who make their clock | |
3376 | * tick in localtime for Windows bug-for-bug compatibility, | |
3377 | * the clock is set in the future, and this will cause e2fsck | |
3378 | * to complain and force a full file system check. | |
3379 | */ | |
3380 | if (!(sb->s_flags & MS_RDONLY)) | |
3381 | es->s_wtime = cpu_to_le32(get_seconds()); | |
afc32f7e | 3382 | es->s_kbytes_written = |
60e6679e | 3383 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + |
afc32f7e TT |
3384 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
3385 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
5d1b1b3f AK |
3386 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3387 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3388 | es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( | |
3389 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3390 | sb->s_dirt = 0; |
ac27a0ec DK |
3391 | BUFFER_TRACE(sbh, "marking dirty"); |
3392 | mark_buffer_dirty(sbh); | |
914258bf | 3393 | if (sync) { |
c4be0c1d TS |
3394 | error = sync_dirty_buffer(sbh); |
3395 | if (error) | |
3396 | return error; | |
3397 | ||
3398 | error = buffer_write_io_error(sbh); | |
3399 | if (error) { | |
b31e1552 ES |
3400 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
3401 | "superblock"); | |
914258bf TT |
3402 | clear_buffer_write_io_error(sbh); |
3403 | set_buffer_uptodate(sbh); | |
3404 | } | |
3405 | } | |
c4be0c1d | 3406 | return error; |
ac27a0ec DK |
3407 | } |
3408 | ||
ac27a0ec DK |
3409 | /* |
3410 | * Have we just finished recovery? If so, and if we are mounting (or | |
3411 | * remounting) the filesystem readonly, then we will end up with a | |
3412 | * consistent fs on disk. Record that fact. | |
3413 | */ | |
2b2d6d01 TT |
3414 | static void ext4_mark_recovery_complete(struct super_block *sb, |
3415 | struct ext4_super_block *es) | |
ac27a0ec | 3416 | { |
617ba13b | 3417 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 3418 | |
0390131b FM |
3419 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3420 | BUG_ON(journal != NULL); | |
3421 | return; | |
3422 | } | |
dab291af | 3423 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
3424 | if (jbd2_journal_flush(journal) < 0) |
3425 | goto out; | |
3426 | ||
617ba13b | 3427 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 3428 | sb->s_flags & MS_RDONLY) { |
617ba13b | 3429 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 3430 | ext4_commit_super(sb, 1); |
ac27a0ec | 3431 | } |
7ffe1ea8 HK |
3432 | |
3433 | out: | |
dab291af | 3434 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
3435 | } |
3436 | ||
3437 | /* | |
3438 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
3439 | * has recorded an error from a previous lifetime, move that error to the | |
3440 | * main filesystem now. | |
3441 | */ | |
2b2d6d01 TT |
3442 | static void ext4_clear_journal_err(struct super_block *sb, |
3443 | struct ext4_super_block *es) | |
ac27a0ec DK |
3444 | { |
3445 | journal_t *journal; | |
3446 | int j_errno; | |
3447 | const char *errstr; | |
3448 | ||
0390131b FM |
3449 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3450 | ||
617ba13b | 3451 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
3452 | |
3453 | /* | |
3454 | * Now check for any error status which may have been recorded in the | |
617ba13b | 3455 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
3456 | */ |
3457 | ||
dab291af | 3458 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
3459 | if (j_errno) { |
3460 | char nbuf[16]; | |
3461 | ||
617ba13b | 3462 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 3463 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 3464 | "from previous mount: %s", errstr); |
12062ddd | 3465 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 3466 | |
617ba13b MC |
3467 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
3468 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 3469 | ext4_commit_super(sb, 1); |
ac27a0ec | 3470 | |
dab291af | 3471 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
3472 | } |
3473 | } | |
3474 | ||
3475 | /* | |
3476 | * Force the running and committing transactions to commit, | |
3477 | * and wait on the commit. | |
3478 | */ | |
617ba13b | 3479 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
3480 | { |
3481 | journal_t *journal; | |
0390131b | 3482 | int ret = 0; |
ac27a0ec DK |
3483 | |
3484 | if (sb->s_flags & MS_RDONLY) | |
3485 | return 0; | |
3486 | ||
617ba13b | 3487 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb ES |
3488 | if (journal) { |
3489 | vfs_check_frozen(sb, SB_FREEZE_WRITE); | |
0390131b | 3490 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 3491 | } |
0390131b | 3492 | |
ac27a0ec DK |
3493 | return ret; |
3494 | } | |
3495 | ||
2b2d6d01 | 3496 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 3497 | { |
ebc1ac16 | 3498 | lock_super(sb); |
9ca92389 | 3499 | ext4_commit_super(sb, 1); |
ebc1ac16 | 3500 | unlock_super(sb); |
ac27a0ec DK |
3501 | } |
3502 | ||
617ba13b | 3503 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 3504 | { |
14ce0cb4 | 3505 | int ret = 0; |
9eddacf9 | 3506 | tid_t target; |
8d5d02e6 | 3507 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3508 | |
9bffad1e | 3509 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
3510 | flush_workqueue(sbi->dio_unwritten_wq); |
3511 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 3512 | if (wait) |
8d5d02e6 | 3513 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 3514 | } |
14ce0cb4 | 3515 | return ret; |
ac27a0ec DK |
3516 | } |
3517 | ||
3518 | /* | |
3519 | * LVM calls this function before a (read-only) snapshot is created. This | |
3520 | * gives us a chance to flush the journal completely and mark the fs clean. | |
3521 | */ | |
c4be0c1d | 3522 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 3523 | { |
c4be0c1d TS |
3524 | int error = 0; |
3525 | journal_t *journal; | |
ac27a0ec | 3526 | |
9ca92389 TT |
3527 | if (sb->s_flags & MS_RDONLY) |
3528 | return 0; | |
ac27a0ec | 3529 | |
9ca92389 | 3530 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 3531 | |
9ca92389 TT |
3532 | /* Now we set up the journal barrier. */ |
3533 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 3534 | |
9ca92389 TT |
3535 | /* |
3536 | * Don't clear the needs_recovery flag if we failed to flush | |
3537 | * the journal. | |
3538 | */ | |
3539 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
3540 | if (error < 0) |
3541 | goto out; | |
9ca92389 TT |
3542 | |
3543 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
3544 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3545 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
3546 | out: |
3547 | /* we rely on s_frozen to stop further updates */ | |
3548 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
3549 | return error; | |
ac27a0ec DK |
3550 | } |
3551 | ||
3552 | /* | |
3553 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
3554 | * flag here, even though the filesystem is not technically dirty yet. | |
3555 | */ | |
c4be0c1d | 3556 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 3557 | { |
9ca92389 TT |
3558 | if (sb->s_flags & MS_RDONLY) |
3559 | return 0; | |
3560 | ||
3561 | lock_super(sb); | |
3562 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
3563 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
3564 | ext4_commit_super(sb, 1); | |
3565 | unlock_super(sb); | |
c4be0c1d | 3566 | return 0; |
ac27a0ec DK |
3567 | } |
3568 | ||
2b2d6d01 | 3569 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 3570 | { |
2b2d6d01 | 3571 | struct ext4_super_block *es; |
617ba13b MC |
3572 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3573 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 3574 | unsigned long old_sb_flags; |
617ba13b | 3575 | struct ext4_mount_options old_opts; |
c79d967d | 3576 | int enable_quota = 0; |
8a266467 | 3577 | ext4_group_t g; |
b3881f74 | 3578 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
3579 | int err; |
3580 | #ifdef CONFIG_QUOTA | |
3581 | int i; | |
3582 | #endif | |
d4c402d9 | 3583 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec | 3584 | |
337eb00a AIB |
3585 | lock_kernel(); |
3586 | ||
ac27a0ec | 3587 | /* Store the original options */ |
bbd6851a | 3588 | lock_super(sb); |
ac27a0ec DK |
3589 | old_sb_flags = sb->s_flags; |
3590 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
3591 | old_opts.s_resuid = sbi->s_resuid; | |
3592 | old_opts.s_resgid = sbi->s_resgid; | |
3593 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
3594 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
3595 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
3596 | #ifdef CONFIG_QUOTA |
3597 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
3598 | for (i = 0; i < MAXQUOTAS; i++) | |
3599 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
3600 | #endif | |
b3881f74 TT |
3601 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
3602 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
3603 | |
3604 | /* | |
3605 | * Allow the "check" option to be passed as a remount option. | |
3606 | */ | |
b3881f74 TT |
3607 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
3608 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
3609 | err = -EINVAL; |
3610 | goto restore_opts; | |
3611 | } | |
3612 | ||
4ab2f15b | 3613 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 3614 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
3615 | |
3616 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3617 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
3618 | |
3619 | es = sbi->s_es; | |
3620 | ||
b3881f74 | 3621 | if (sbi->s_journal) { |
0390131b | 3622 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
3623 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
3624 | } | |
ac27a0ec DK |
3625 | |
3626 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 3627 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 3628 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
3629 | err = -EROFS; |
3630 | goto restore_opts; | |
3631 | } | |
3632 | ||
3633 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
3634 | err = dquot_suspend(sb, -1); |
3635 | if (err < 0) | |
c79d967d | 3636 | goto restore_opts; |
c79d967d | 3637 | |
ac27a0ec DK |
3638 | /* |
3639 | * First of all, the unconditional stuff we have to do | |
3640 | * to disable replay of the journal when we next remount | |
3641 | */ | |
3642 | sb->s_flags |= MS_RDONLY; | |
3643 | ||
3644 | /* | |
3645 | * OK, test if we are remounting a valid rw partition | |
3646 | * readonly, and if so set the rdonly flag and then | |
3647 | * mark the partition as valid again. | |
3648 | */ | |
617ba13b MC |
3649 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
3650 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
3651 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
3652 | ||
a63c9eb2 | 3653 | if (sbi->s_journal) |
0390131b | 3654 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 3655 | } else { |
a13fb1a4 ES |
3656 | /* Make sure we can mount this feature set readwrite */ |
3657 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
3658 | err = -EROFS; |
3659 | goto restore_opts; | |
3660 | } | |
8a266467 TT |
3661 | /* |
3662 | * Make sure the group descriptor checksums | |
0b8e58a1 | 3663 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
3664 | */ |
3665 | for (g = 0; g < sbi->s_groups_count; g++) { | |
3666 | struct ext4_group_desc *gdp = | |
3667 | ext4_get_group_desc(sb, g, NULL); | |
3668 | ||
3669 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
3670 | ext4_msg(sb, KERN_ERR, |
3671 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
3672 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
3673 | le16_to_cpu(gdp->bg_checksum)); | |
3674 | err = -EINVAL; | |
3675 | goto restore_opts; | |
3676 | } | |
3677 | } | |
3678 | ||
ead6596b ES |
3679 | /* |
3680 | * If we have an unprocessed orphan list hanging | |
3681 | * around from a previously readonly bdev mount, | |
3682 | * require a full umount/remount for now. | |
3683 | */ | |
3684 | if (es->s_last_orphan) { | |
b31e1552 | 3685 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
3686 | "remount RDWR because of unprocessed " |
3687 | "orphan inode list. Please " | |
b31e1552 | 3688 | "umount/remount instead"); |
ead6596b ES |
3689 | err = -EINVAL; |
3690 | goto restore_opts; | |
3691 | } | |
3692 | ||
ac27a0ec DK |
3693 | /* |
3694 | * Mounting a RDONLY partition read-write, so reread | |
3695 | * and store the current valid flag. (It may have | |
3696 | * been changed by e2fsck since we originally mounted | |
3697 | * the partition.) | |
3698 | */ | |
0390131b FM |
3699 | if (sbi->s_journal) |
3700 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3701 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 3702 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 3703 | goto restore_opts; |
2b2d6d01 | 3704 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 3705 | sb->s_flags &= ~MS_RDONLY; |
c79d967d | 3706 | enable_quota = 1; |
ac27a0ec DK |
3707 | } |
3708 | } | |
6fd058f7 | 3709 | ext4_setup_system_zone(sb); |
0390131b | 3710 | if (sbi->s_journal == NULL) |
e2d67052 | 3711 | ext4_commit_super(sb, 1); |
0390131b | 3712 | |
ac27a0ec DK |
3713 | #ifdef CONFIG_QUOTA |
3714 | /* Release old quota file names */ | |
3715 | for (i = 0; i < MAXQUOTAS; i++) | |
3716 | if (old_opts.s_qf_names[i] && | |
3717 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3718 | kfree(old_opts.s_qf_names[i]); | |
3719 | #endif | |
bbd6851a | 3720 | unlock_super(sb); |
337eb00a | 3721 | unlock_kernel(); |
c79d967d | 3722 | if (enable_quota) |
0f0dd62f | 3723 | dquot_resume(sb, -1); |
d4c402d9 CW |
3724 | |
3725 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
3726 | kfree(orig_data); | |
ac27a0ec | 3727 | return 0; |
0b8e58a1 | 3728 | |
ac27a0ec DK |
3729 | restore_opts: |
3730 | sb->s_flags = old_sb_flags; | |
3731 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
3732 | sbi->s_resuid = old_opts.s_resuid; | |
3733 | sbi->s_resgid = old_opts.s_resgid; | |
3734 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
3735 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
3736 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
3737 | #ifdef CONFIG_QUOTA |
3738 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
3739 | for (i = 0; i < MAXQUOTAS; i++) { | |
3740 | if (sbi->s_qf_names[i] && | |
3741 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
3742 | kfree(sbi->s_qf_names[i]); | |
3743 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
3744 | } | |
3745 | #endif | |
bbd6851a | 3746 | unlock_super(sb); |
337eb00a | 3747 | unlock_kernel(); |
d4c402d9 | 3748 | kfree(orig_data); |
ac27a0ec DK |
3749 | return err; |
3750 | } | |
3751 | ||
2b2d6d01 | 3752 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
3753 | { |
3754 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
3755 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3756 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 3757 | u64 fsid; |
ac27a0ec | 3758 | |
5e70030d BP |
3759 | if (test_opt(sb, MINIX_DF)) { |
3760 | sbi->s_overhead_last = 0; | |
6bc9feff | 3761 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 3762 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 3763 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
3764 | |
3765 | /* | |
5e70030d BP |
3766 | * Compute the overhead (FS structures). This is constant |
3767 | * for a given filesystem unless the number of block groups | |
3768 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
3769 | */ |
3770 | ||
3771 | /* | |
3772 | * All of the blocks before first_data_block are | |
3773 | * overhead | |
3774 | */ | |
3775 | overhead = le32_to_cpu(es->s_first_data_block); | |
3776 | ||
3777 | /* | |
3778 | * Add the overhead attributed to the superblock and | |
3779 | * block group descriptors. If the sparse superblocks | |
3780 | * feature is turned on, then not all groups have this. | |
3781 | */ | |
3782 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
3783 | overhead += ext4_bg_has_super(sb, i) + |
3784 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
3785 | cond_resched(); |
3786 | } | |
3787 | ||
3788 | /* | |
3789 | * Every block group has an inode bitmap, a block | |
3790 | * bitmap, and an inode table. | |
3791 | */ | |
5e70030d BP |
3792 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
3793 | sbi->s_overhead_last = overhead; | |
3794 | smp_wmb(); | |
6bc9feff | 3795 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
3796 | } |
3797 | ||
617ba13b | 3798 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 3799 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 3800 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
3801 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
3802 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
3803 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
3804 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
3805 | buf->f_bavail = 0; |
3806 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 3807 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 3808 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
3809 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
3810 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
3811 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
3812 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 3813 | |
ac27a0ec DK |
3814 | return 0; |
3815 | } | |
3816 | ||
0b8e58a1 AD |
3817 | /* Helper function for writing quotas on sync - we need to start transaction |
3818 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 3819 | * Process 1 Process 2 |
617ba13b | 3820 | * ext4_create() quota_sync() |
a269eb18 | 3821 | * jbd2_journal_start() write_dquot() |
871a2931 | 3822 | * dquot_initialize() down(dqio_mutex) |
dab291af | 3823 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
3824 | * |
3825 | */ | |
3826 | ||
3827 | #ifdef CONFIG_QUOTA | |
3828 | ||
3829 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
3830 | { | |
3831 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
3832 | } | |
3833 | ||
617ba13b | 3834 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
3835 | { |
3836 | int ret, err; | |
3837 | handle_t *handle; | |
3838 | struct inode *inode; | |
3839 | ||
3840 | inode = dquot_to_inode(dquot); | |
617ba13b | 3841 | handle = ext4_journal_start(inode, |
0b8e58a1 | 3842 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3843 | if (IS_ERR(handle)) |
3844 | return PTR_ERR(handle); | |
3845 | ret = dquot_commit(dquot); | |
617ba13b | 3846 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3847 | if (!ret) |
3848 | ret = err; | |
3849 | return ret; | |
3850 | } | |
3851 | ||
617ba13b | 3852 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
3853 | { |
3854 | int ret, err; | |
3855 | handle_t *handle; | |
3856 | ||
617ba13b | 3857 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3858 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
3859 | if (IS_ERR(handle)) |
3860 | return PTR_ERR(handle); | |
3861 | ret = dquot_acquire(dquot); | |
617ba13b | 3862 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3863 | if (!ret) |
3864 | ret = err; | |
3865 | return ret; | |
3866 | } | |
3867 | ||
617ba13b | 3868 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
3869 | { |
3870 | int ret, err; | |
3871 | handle_t *handle; | |
3872 | ||
617ba13b | 3873 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 3874 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
3875 | if (IS_ERR(handle)) { |
3876 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
3877 | dquot_release(dquot); | |
ac27a0ec | 3878 | return PTR_ERR(handle); |
9c3013e9 | 3879 | } |
ac27a0ec | 3880 | ret = dquot_release(dquot); |
617ba13b | 3881 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3882 | if (!ret) |
3883 | ret = err; | |
3884 | return ret; | |
3885 | } | |
3886 | ||
617ba13b | 3887 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 3888 | { |
2c8be6b2 | 3889 | /* Are we journaling quotas? */ |
617ba13b MC |
3890 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
3891 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 3892 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 3893 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
3894 | } else { |
3895 | return dquot_mark_dquot_dirty(dquot); | |
3896 | } | |
3897 | } | |
3898 | ||
617ba13b | 3899 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
3900 | { |
3901 | int ret, err; | |
3902 | handle_t *handle; | |
3903 | ||
3904 | /* Data block + inode block */ | |
617ba13b | 3905 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
3906 | if (IS_ERR(handle)) |
3907 | return PTR_ERR(handle); | |
3908 | ret = dquot_commit_info(sb, type); | |
617ba13b | 3909 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
3910 | if (!ret) |
3911 | ret = err; | |
3912 | return ret; | |
3913 | } | |
3914 | ||
3915 | /* | |
3916 | * Turn on quotas during mount time - we need to find | |
3917 | * the quota file and such... | |
3918 | */ | |
617ba13b | 3919 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 3920 | { |
287a8095 CH |
3921 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
3922 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
3923 | } |
3924 | ||
3925 | /* | |
3926 | * Standard function to be called on quota_on | |
3927 | */ | |
617ba13b | 3928 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 3929 | char *name) |
ac27a0ec DK |
3930 | { |
3931 | int err; | |
8264613d | 3932 | struct path path; |
ac27a0ec DK |
3933 | |
3934 | if (!test_opt(sb, QUOTA)) | |
3935 | return -EINVAL; | |
0623543b | 3936 | |
8264613d | 3937 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
3938 | if (err) |
3939 | return err; | |
0623543b | 3940 | |
ac27a0ec | 3941 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
3942 | if (path.mnt->mnt_sb != sb) { |
3943 | path_put(&path); | |
ac27a0ec DK |
3944 | return -EXDEV; |
3945 | } | |
0623543b JK |
3946 | /* Journaling quota? */ |
3947 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 3948 | /* Quotafile not in fs root? */ |
8264613d | 3949 | if (path.dentry->d_parent != sb->s_root) |
b31e1552 ES |
3950 | ext4_msg(sb, KERN_WARNING, |
3951 | "Quota file not on filesystem root. " | |
3952 | "Journaled quota will not work"); | |
2b2d6d01 | 3953 | } |
0623543b JK |
3954 | |
3955 | /* | |
3956 | * When we journal data on quota file, we have to flush journal to see | |
3957 | * all updates to the file when we bypass pagecache... | |
3958 | */ | |
0390131b FM |
3959 | if (EXT4_SB(sb)->s_journal && |
3960 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
3961 | /* |
3962 | * We don't need to lock updates but journal_flush() could | |
3963 | * otherwise be livelocked... | |
3964 | */ | |
3965 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 3966 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 3967 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 3968 | if (err) { |
8264613d | 3969 | path_put(&path); |
7ffe1ea8 HK |
3970 | return err; |
3971 | } | |
0623543b JK |
3972 | } |
3973 | ||
287a8095 | 3974 | err = dquot_quota_on_path(sb, type, format_id, &path); |
8264613d | 3975 | path_put(&path); |
77e69dac | 3976 | return err; |
ac27a0ec DK |
3977 | } |
3978 | ||
3979 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
3980 | * acquiring the locks... As quota files are never truncated and quota code | |
3981 | * itself serializes the operations (and noone else should touch the files) | |
3982 | * we don't have to be afraid of races */ | |
617ba13b | 3983 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
3984 | size_t len, loff_t off) |
3985 | { | |
3986 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 3987 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
3988 | int err = 0; |
3989 | int offset = off & (sb->s_blocksize - 1); | |
3990 | int tocopy; | |
3991 | size_t toread; | |
3992 | struct buffer_head *bh; | |
3993 | loff_t i_size = i_size_read(inode); | |
3994 | ||
3995 | if (off > i_size) | |
3996 | return 0; | |
3997 | if (off+len > i_size) | |
3998 | len = i_size-off; | |
3999 | toread = len; | |
4000 | while (toread > 0) { | |
4001 | tocopy = sb->s_blocksize - offset < toread ? | |
4002 | sb->s_blocksize - offset : toread; | |
617ba13b | 4003 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4004 | if (err) |
4005 | return err; | |
4006 | if (!bh) /* A hole? */ | |
4007 | memset(data, 0, tocopy); | |
4008 | else | |
4009 | memcpy(data, bh->b_data+offset, tocopy); | |
4010 | brelse(bh); | |
4011 | offset = 0; | |
4012 | toread -= tocopy; | |
4013 | data += tocopy; | |
4014 | blk++; | |
4015 | } | |
4016 | return len; | |
4017 | } | |
4018 | ||
4019 | /* Write to quotafile (we know the transaction is already started and has | |
4020 | * enough credits) */ | |
617ba13b | 4021 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4022 | const char *data, size_t len, loff_t off) |
4023 | { | |
4024 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4025 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4026 | int err = 0; |
4027 | int offset = off & (sb->s_blocksize - 1); | |
617ba13b | 4028 | int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; |
ac27a0ec DK |
4029 | struct buffer_head *bh; |
4030 | handle_t *handle = journal_current_handle(); | |
4031 | ||
0390131b | 4032 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4033 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4034 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4035 | (unsigned long long)off, (unsigned long long)len); |
4036 | return -EIO; | |
4037 | } | |
67eeb568 DM |
4038 | /* |
4039 | * Since we account only one data block in transaction credits, | |
4040 | * then it is impossible to cross a block boundary. | |
4041 | */ | |
4042 | if (sb->s_blocksize - offset < len) { | |
4043 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4044 | " cancelled because not block aligned", | |
4045 | (unsigned long long)off, (unsigned long long)len); | |
4046 | return -EIO; | |
4047 | } | |
4048 | ||
ac27a0ec | 4049 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4050 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4051 | if (!bh) | |
4052 | goto out; | |
4053 | if (journal_quota) { | |
4054 | err = ext4_journal_get_write_access(handle, bh); | |
4055 | if (err) { | |
4056 | brelse(bh); | |
ac27a0ec | 4057 | goto out; |
ac27a0ec | 4058 | } |
ac27a0ec | 4059 | } |
67eeb568 DM |
4060 | lock_buffer(bh); |
4061 | memcpy(bh->b_data+offset, data, len); | |
4062 | flush_dcache_page(bh->b_page); | |
4063 | unlock_buffer(bh); | |
4064 | if (journal_quota) | |
4065 | err = ext4_handle_dirty_metadata(handle, NULL, bh); | |
4066 | else { | |
4067 | /* Always do at least ordered writes for quotas */ | |
4068 | err = ext4_jbd2_file_inode(handle, inode); | |
4069 | mark_buffer_dirty(bh); | |
4070 | } | |
4071 | brelse(bh); | |
ac27a0ec | 4072 | out: |
67eeb568 | 4073 | if (err) { |
4d04e4fb | 4074 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4075 | return err; |
4d04e4fb | 4076 | } |
67eeb568 DM |
4077 | if (inode->i_size < off + len) { |
4078 | i_size_write(inode, off + len); | |
617ba13b | 4079 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 4080 | } |
ac27a0ec | 4081 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 4082 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4083 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4084 | return len; |
ac27a0ec DK |
4085 | } |
4086 | ||
4087 | #endif | |
4088 | ||
0b8e58a1 AD |
4089 | static int ext4_get_sb(struct file_system_type *fs_type, int flags, |
4090 | const char *dev_name, void *data, struct vfsmount *mnt) | |
ac27a0ec | 4091 | { |
0b8e58a1 | 4092 | return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); |
ac27a0ec DK |
4093 | } |
4094 | ||
37f328eb | 4095 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4096 | static struct file_system_type ext2_fs_type = { |
4097 | .owner = THIS_MODULE, | |
4098 | .name = "ext2", | |
4099 | .get_sb = ext4_get_sb, | |
4100 | .kill_sb = kill_block_super, | |
4101 | .fs_flags = FS_REQUIRES_DEV, | |
4102 | }; | |
4103 | ||
4104 | static inline void register_as_ext2(void) | |
4105 | { | |
4106 | int err = register_filesystem(&ext2_fs_type); | |
4107 | if (err) | |
4108 | printk(KERN_WARNING | |
4109 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4110 | } | |
4111 | ||
4112 | static inline void unregister_as_ext2(void) | |
4113 | { | |
4114 | unregister_filesystem(&ext2_fs_type); | |
4115 | } | |
51b7e3c9 | 4116 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4117 | #else |
4118 | static inline void register_as_ext2(void) { } | |
4119 | static inline void unregister_as_ext2(void) { } | |
4120 | #endif | |
4121 | ||
37f328eb | 4122 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4123 | static inline void register_as_ext3(void) |
4124 | { | |
4125 | int err = register_filesystem(&ext3_fs_type); | |
4126 | if (err) | |
4127 | printk(KERN_WARNING | |
4128 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4129 | } | |
4130 | ||
4131 | static inline void unregister_as_ext3(void) | |
4132 | { | |
4133 | unregister_filesystem(&ext3_fs_type); | |
4134 | } | |
51b7e3c9 | 4135 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4136 | #else |
4137 | static inline void register_as_ext3(void) { } | |
4138 | static inline void unregister_as_ext3(void) { } | |
4139 | #endif | |
4140 | ||
03010a33 TT |
4141 | static struct file_system_type ext4_fs_type = { |
4142 | .owner = THIS_MODULE, | |
4143 | .name = "ext4", | |
4144 | .get_sb = ext4_get_sb, | |
4145 | .kill_sb = kill_block_super, | |
4146 | .fs_flags = FS_REQUIRES_DEV, | |
4147 | }; | |
4148 | ||
617ba13b | 4149 | static int __init init_ext4_fs(void) |
ac27a0ec | 4150 | { |
c9de560d AT |
4151 | int err; |
4152 | ||
12e9b892 | 4153 | ext4_check_flag_values(); |
6fd058f7 TT |
4154 | err = init_ext4_system_zone(); |
4155 | if (err) | |
4156 | return err; | |
3197ebdb TT |
4157 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4158 | if (!ext4_kset) | |
6fd058f7 | 4159 | goto out4; |
9f6200bb | 4160 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
c9de560d | 4161 | err = init_ext4_mballoc(); |
ac27a0ec | 4162 | if (err) |
6fd058f7 | 4163 | goto out3; |
c9de560d AT |
4164 | |
4165 | err = init_ext4_xattr(); | |
4166 | if (err) | |
4167 | goto out2; | |
ac27a0ec DK |
4168 | err = init_inodecache(); |
4169 | if (err) | |
4170 | goto out1; | |
24b58424 TT |
4171 | register_as_ext2(); |
4172 | register_as_ext3(); | |
03010a33 | 4173 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4174 | if (err) |
4175 | goto out; | |
4176 | return 0; | |
4177 | out: | |
24b58424 TT |
4178 | unregister_as_ext2(); |
4179 | unregister_as_ext3(); | |
ac27a0ec DK |
4180 | destroy_inodecache(); |
4181 | out1: | |
617ba13b | 4182 | exit_ext4_xattr(); |
c9de560d AT |
4183 | out2: |
4184 | exit_ext4_mballoc(); | |
6fd058f7 TT |
4185 | out3: |
4186 | remove_proc_entry("fs/ext4", NULL); | |
4187 | kset_unregister(ext4_kset); | |
4188 | out4: | |
4189 | exit_ext4_system_zone(); | |
ac27a0ec DK |
4190 | return err; |
4191 | } | |
4192 | ||
617ba13b | 4193 | static void __exit exit_ext4_fs(void) |
ac27a0ec | 4194 | { |
24b58424 TT |
4195 | unregister_as_ext2(); |
4196 | unregister_as_ext3(); | |
03010a33 | 4197 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4198 | destroy_inodecache(); |
617ba13b | 4199 | exit_ext4_xattr(); |
c9de560d | 4200 | exit_ext4_mballoc(); |
9f6200bb | 4201 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4202 | kset_unregister(ext4_kset); |
6fd058f7 | 4203 | exit_ext4_system_zone(); |
ac27a0ec DK |
4204 | } |
4205 | ||
4206 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4207 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4208 | MODULE_LICENSE("GPL"); |
617ba13b MC |
4209 | module_init(init_ext4_fs) |
4210 | module_exit(exit_ext4_fs) |