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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> | |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
7abc52c2 | 41 | #include <linux/cleancache.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
bfff6873 LC |
44 | #include <linux/kthread.h> |
45 | #include <linux/freezer.h> | |
46 | ||
3dcf5451 | 47 | #include "ext4.h" |
6f91bc5f | 48 | #include "ext4_extents.h" |
3dcf5451 | 49 | #include "ext4_jbd2.h" |
ac27a0ec DK |
50 | #include "xattr.h" |
51 | #include "acl.h" | |
3661d286 | 52 | #include "mballoc.h" |
ac27a0ec | 53 | |
9bffad1e TT |
54 | #define CREATE_TRACE_POINTS |
55 | #include <trace/events/ext4.h> | |
56 | ||
1f109d5a | 57 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 58 | static struct kset *ext4_kset; |
0b75a840 LC |
59 | static struct ext4_lazy_init *ext4_li_info; |
60 | static struct mutex ext4_li_mtx; | |
61 | static struct ext4_features *ext4_feat; | |
9f6200bb | 62 | |
617ba13b | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 64 | unsigned long journal_devnum); |
e2d67052 | 65 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
66 | static void ext4_mark_recovery_complete(struct super_block *sb, |
67 | struct ext4_super_block *es); | |
68 | static void ext4_clear_journal_err(struct super_block *sb, | |
69 | struct ext4_super_block *es); | |
617ba13b | 70 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 71 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 72 | char nbuf[16]); |
2b2d6d01 TT |
73 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
74 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 75 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 76 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 77 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
78 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
79 | const char *dev_name, void *data); | |
2035e776 TT |
80 | static inline int ext2_feature_set_ok(struct super_block *sb); |
81 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 82 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
83 | static void ext4_destroy_lazyinit_thread(void); |
84 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 85 | static void ext4_clear_request_list(void); |
ac27a0ec | 86 | |
2035e776 TT |
87 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
88 | static struct file_system_type ext2_fs_type = { | |
89 | .owner = THIS_MODULE, | |
90 | .name = "ext2", | |
91 | .mount = ext4_mount, | |
92 | .kill_sb = kill_block_super, | |
93 | .fs_flags = FS_REQUIRES_DEV, | |
94 | }; | |
95 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) | |
96 | #else | |
97 | #define IS_EXT2_SB(sb) (0) | |
98 | #endif | |
99 | ||
100 | ||
ba69f9ab JK |
101 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
102 | static struct file_system_type ext3_fs_type = { | |
103 | .owner = THIS_MODULE, | |
104 | .name = "ext3", | |
152a0836 | 105 | .mount = ext4_mount, |
ba69f9ab JK |
106 | .kill_sb = kill_block_super, |
107 | .fs_flags = FS_REQUIRES_DEV, | |
108 | }; | |
109 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
110 | #else | |
111 | #define IS_EXT3_SB(sb) (0) | |
112 | #endif | |
bd81d8ee | 113 | |
9933fc0a TT |
114 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
115 | { | |
116 | void *ret; | |
117 | ||
118 | ret = kmalloc(size, flags); | |
119 | if (!ret) | |
120 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
121 | return ret; | |
122 | } | |
123 | ||
124 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
125 | { | |
126 | void *ret; | |
127 | ||
db9481c0 | 128 | ret = kzalloc(size, flags); |
9933fc0a TT |
129 | if (!ret) |
130 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
131 | return ret; | |
132 | } | |
133 | ||
134 | void ext4_kvfree(void *ptr) | |
135 | { | |
136 | if (is_vmalloc_addr(ptr)) | |
137 | vfree(ptr); | |
138 | else | |
139 | kfree(ptr); | |
140 | ||
141 | } | |
142 | ||
8fadc143 AR |
143 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
144 | struct ext4_group_desc *bg) | |
bd81d8ee | 145 | { |
3a14589c | 146 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 147 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 148 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
149 | } |
150 | ||
8fadc143 AR |
151 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
152 | struct ext4_group_desc *bg) | |
bd81d8ee | 153 | { |
5272f837 | 154 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 155 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 156 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
157 | } |
158 | ||
8fadc143 AR |
159 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
160 | struct ext4_group_desc *bg) | |
bd81d8ee | 161 | { |
5272f837 | 162 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 163 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 164 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
165 | } |
166 | ||
021b65bb TT |
167 | __u32 ext4_free_group_clusters(struct super_block *sb, |
168 | struct ext4_group_desc *bg) | |
560671a0 AK |
169 | { |
170 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
171 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 172 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
173 | } |
174 | ||
175 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
176 | struct ext4_group_desc *bg) | |
177 | { | |
178 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
179 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 180 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
181 | } |
182 | ||
183 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
184 | struct ext4_group_desc *bg) | |
185 | { | |
186 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
187 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 188 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
189 | } |
190 | ||
191 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
192 | struct ext4_group_desc *bg) | |
193 | { | |
194 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
195 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 196 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
197 | } |
198 | ||
8fadc143 AR |
199 | void ext4_block_bitmap_set(struct super_block *sb, |
200 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 201 | { |
3a14589c | 202 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
203 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
204 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
205 | } |
206 | ||
8fadc143 AR |
207 | void ext4_inode_bitmap_set(struct super_block *sb, |
208 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 209 | { |
5272f837 | 210 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
211 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
212 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
213 | } |
214 | ||
8fadc143 AR |
215 | void ext4_inode_table_set(struct super_block *sb, |
216 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 217 | { |
5272f837 | 218 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
219 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
220 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
221 | } |
222 | ||
021b65bb TT |
223 | void ext4_free_group_clusters_set(struct super_block *sb, |
224 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
225 | { |
226 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
227 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
228 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
229 | } | |
230 | ||
231 | void ext4_free_inodes_set(struct super_block *sb, | |
232 | struct ext4_group_desc *bg, __u32 count) | |
233 | { | |
234 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
235 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
236 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
237 | } | |
238 | ||
239 | void ext4_used_dirs_set(struct super_block *sb, | |
240 | struct ext4_group_desc *bg, __u32 count) | |
241 | { | |
242 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
243 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
244 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
245 | } | |
246 | ||
247 | void ext4_itable_unused_set(struct super_block *sb, | |
248 | struct ext4_group_desc *bg, __u32 count) | |
249 | { | |
250 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
251 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
252 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
253 | } | |
254 | ||
d3d1faf6 CW |
255 | |
256 | /* Just increment the non-pointer handle value */ | |
257 | static handle_t *ext4_get_nojournal(void) | |
258 | { | |
259 | handle_t *handle = current->journal_info; | |
260 | unsigned long ref_cnt = (unsigned long)handle; | |
261 | ||
262 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
263 | ||
264 | ref_cnt++; | |
265 | handle = (handle_t *)ref_cnt; | |
266 | ||
267 | current->journal_info = handle; | |
268 | return handle; | |
269 | } | |
270 | ||
271 | ||
272 | /* Decrement the non-pointer handle value */ | |
273 | static void ext4_put_nojournal(handle_t *handle) | |
274 | { | |
275 | unsigned long ref_cnt = (unsigned long)handle; | |
276 | ||
277 | BUG_ON(ref_cnt == 0); | |
278 | ||
279 | ref_cnt--; | |
280 | handle = (handle_t *)ref_cnt; | |
281 | ||
282 | current->journal_info = handle; | |
283 | } | |
284 | ||
ac27a0ec | 285 | /* |
dab291af | 286 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
287 | * |
288 | * The only special thing we need to do here is to make sure that all | |
289 | * journal_end calls result in the superblock being marked dirty, so | |
290 | * that sync() will call the filesystem's write_super callback if | |
291 | * appropriate. | |
be4f27d3 YY |
292 | * |
293 | * To avoid j_barrier hold in userspace when a user calls freeze(), | |
294 | * ext4 prevents a new handle from being started by s_frozen, which | |
295 | * is in an upper layer. | |
ac27a0ec | 296 | */ |
617ba13b | 297 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
298 | { |
299 | journal_t *journal; | |
be4f27d3 | 300 | handle_t *handle; |
ac27a0ec | 301 | |
12706394 | 302 | trace_ext4_journal_start(sb, nblocks, _RET_IP_); |
ac27a0ec DK |
303 | if (sb->s_flags & MS_RDONLY) |
304 | return ERR_PTR(-EROFS); | |
305 | ||
617ba13b | 306 | journal = EXT4_SB(sb)->s_journal; |
be4f27d3 YY |
307 | handle = ext4_journal_current_handle(); |
308 | ||
309 | /* | |
310 | * If a handle has been started, it should be allowed to | |
311 | * finish, otherwise deadlock could happen between freeze | |
312 | * and others(e.g. truncate) due to the restart of the | |
313 | * journal handle if the filesystem is forzen and active | |
314 | * handles are not stopped. | |
315 | */ | |
316 | if (!handle) | |
317 | vfs_check_frozen(sb, SB_FREEZE_TRANS); | |
318 | ||
319 | if (!journal) | |
320 | return ext4_get_nojournal(); | |
321 | /* | |
322 | * Special case here: if the journal has aborted behind our | |
323 | * backs (eg. EIO in the commit thread), then we still need to | |
324 | * take the FS itself readonly cleanly. | |
325 | */ | |
326 | if (is_journal_aborted(journal)) { | |
327 | ext4_abort(sb, "Detected aborted journal"); | |
328 | return ERR_PTR(-EROFS); | |
ac27a0ec | 329 | } |
be4f27d3 | 330 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
331 | } |
332 | ||
333 | /* | |
334 | * The only special thing we need to do here is to make sure that all | |
dab291af | 335 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
336 | * that sync() will call the filesystem's write_super callback if |
337 | * appropriate. | |
338 | */ | |
c398eda0 | 339 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
340 | { |
341 | struct super_block *sb; | |
342 | int err; | |
343 | int rc; | |
344 | ||
0390131b | 345 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 346 | ext4_put_nojournal(handle); |
0390131b FM |
347 | return 0; |
348 | } | |
ac27a0ec DK |
349 | sb = handle->h_transaction->t_journal->j_private; |
350 | err = handle->h_err; | |
dab291af | 351 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
352 | |
353 | if (!err) | |
354 | err = rc; | |
355 | if (err) | |
c398eda0 | 356 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
357 | return err; |
358 | } | |
359 | ||
90c7201b TT |
360 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
361 | const char *err_fn, struct buffer_head *bh, | |
362 | handle_t *handle, int err) | |
ac27a0ec DK |
363 | { |
364 | char nbuf[16]; | |
617ba13b | 365 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 366 | |
0390131b FM |
367 | BUG_ON(!ext4_handle_valid(handle)); |
368 | ||
ac27a0ec DK |
369 | if (bh) |
370 | BUFFER_TRACE(bh, "abort"); | |
371 | ||
372 | if (!handle->h_err) | |
373 | handle->h_err = err; | |
374 | ||
375 | if (is_handle_aborted(handle)) | |
376 | return; | |
377 | ||
90c7201b TT |
378 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
379 | caller, line, errstr, err_fn); | |
ac27a0ec | 380 | |
dab291af | 381 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
382 | } |
383 | ||
1c13d5c0 TT |
384 | static void __save_error_info(struct super_block *sb, const char *func, |
385 | unsigned int line) | |
386 | { | |
387 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
388 | ||
389 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
390 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
391 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
392 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
393 | es->s_last_error_line = cpu_to_le32(line); | |
394 | if (!es->s_first_error_time) { | |
395 | es->s_first_error_time = es->s_last_error_time; | |
396 | strncpy(es->s_first_error_func, func, | |
397 | sizeof(es->s_first_error_func)); | |
398 | es->s_first_error_line = cpu_to_le32(line); | |
399 | es->s_first_error_ino = es->s_last_error_ino; | |
400 | es->s_first_error_block = es->s_last_error_block; | |
401 | } | |
66e61a9e TT |
402 | /* |
403 | * Start the daily error reporting function if it hasn't been | |
404 | * started already | |
405 | */ | |
406 | if (!es->s_error_count) | |
407 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
408 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
409 | } | |
410 | ||
411 | static void save_error_info(struct super_block *sb, const char *func, | |
412 | unsigned int line) | |
413 | { | |
414 | __save_error_info(sb, func, line); | |
415 | ext4_commit_super(sb, 1); | |
416 | } | |
417 | ||
7c2e7087 TT |
418 | /* |
419 | * The del_gendisk() function uninitializes the disk-specific data | |
420 | * structures, including the bdi structure, without telling anyone | |
421 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
422 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
423 | * This is a kludge to prevent these oops until we can put in a proper | |
424 | * hook in del_gendisk() to inform the VFS and file system layers. | |
425 | */ | |
426 | static int block_device_ejected(struct super_block *sb) | |
427 | { | |
428 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
429 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; | |
430 | ||
431 | return bdi->dev == NULL; | |
432 | } | |
433 | ||
18aadd47 BJ |
434 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
435 | { | |
436 | struct super_block *sb = journal->j_private; | |
437 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
438 | int error = is_journal_aborted(journal); | |
439 | struct ext4_journal_cb_entry *jce, *tmp; | |
440 | ||
441 | spin_lock(&sbi->s_md_lock); | |
442 | list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { | |
443 | list_del_init(&jce->jce_list); | |
444 | spin_unlock(&sbi->s_md_lock); | |
445 | jce->jce_func(sb, jce, error); | |
446 | spin_lock(&sbi->s_md_lock); | |
447 | } | |
448 | spin_unlock(&sbi->s_md_lock); | |
449 | } | |
1c13d5c0 | 450 | |
ac27a0ec DK |
451 | /* Deal with the reporting of failure conditions on a filesystem such as |
452 | * inconsistencies detected or read IO failures. | |
453 | * | |
454 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 455 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
456 | * write ordering constraints on the superblock which prevent us from |
457 | * writing it out straight away; and given that the journal is about to | |
458 | * be aborted, we can't rely on the current, or future, transactions to | |
459 | * write out the superblock safely. | |
460 | * | |
dab291af | 461 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 462 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
463 | * that error until we've noted it down and cleared it. |
464 | */ | |
465 | ||
617ba13b | 466 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 467 | { |
ac27a0ec DK |
468 | if (sb->s_flags & MS_RDONLY) |
469 | return; | |
470 | ||
2b2d6d01 | 471 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 472 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 473 | |
4ab2f15b | 474 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 475 | if (journal) |
dab291af | 476 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 477 | } |
2b2d6d01 | 478 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 479 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
480 | sb->s_flags |= MS_RDONLY; |
481 | } | |
ac27a0ec | 482 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 483 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
484 | sb->s_id); |
485 | } | |
486 | ||
12062ddd | 487 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 488 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 489 | { |
0ff2ea7d | 490 | struct va_format vaf; |
ac27a0ec DK |
491 | va_list args; |
492 | ||
493 | va_start(args, fmt); | |
0ff2ea7d JP |
494 | vaf.fmt = fmt; |
495 | vaf.va = &args; | |
496 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
497 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
498 | va_end(args); |
499 | ||
617ba13b | 500 | ext4_handle_error(sb); |
ac27a0ec DK |
501 | } |
502 | ||
c398eda0 TT |
503 | void ext4_error_inode(struct inode *inode, const char *function, |
504 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
505 | const char *fmt, ...) |
506 | { | |
507 | va_list args; | |
f7c21177 | 508 | struct va_format vaf; |
1c13d5c0 | 509 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 510 | |
1c13d5c0 TT |
511 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
512 | es->s_last_error_block = cpu_to_le64(block); | |
513 | save_error_info(inode->i_sb, function, line); | |
273df556 | 514 | va_start(args, fmt); |
f7c21177 TT |
515 | vaf.fmt = fmt; |
516 | vaf.va = &args; | |
c398eda0 TT |
517 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
518 | inode->i_sb->s_id, function, line, inode->i_ino); | |
519 | if (block) | |
f7c21177 TT |
520 | printk(KERN_CONT "block %llu: ", block); |
521 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
522 | va_end(args); |
523 | ||
524 | ext4_handle_error(inode->i_sb); | |
525 | } | |
526 | ||
c398eda0 | 527 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
528 | unsigned int line, ext4_fsblk_t block, |
529 | const char *fmt, ...) | |
273df556 FM |
530 | { |
531 | va_list args; | |
f7c21177 | 532 | struct va_format vaf; |
1c13d5c0 | 533 | struct ext4_super_block *es; |
273df556 FM |
534 | struct inode *inode = file->f_dentry->d_inode; |
535 | char pathname[80], *path; | |
536 | ||
1c13d5c0 TT |
537 | es = EXT4_SB(inode->i_sb)->s_es; |
538 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
539 | save_error_info(inode->i_sb, function, line); | |
273df556 | 540 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 541 | if (IS_ERR(path)) |
273df556 FM |
542 | path = "(unknown)"; |
543 | printk(KERN_CRIT | |
f7c21177 TT |
544 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
545 | inode->i_sb->s_id, function, line, inode->i_ino); | |
546 | if (block) | |
547 | printk(KERN_CONT "block %llu: ", block); | |
548 | va_start(args, fmt); | |
549 | vaf.fmt = fmt; | |
550 | vaf.va = &args; | |
551 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
552 | va_end(args); |
553 | ||
554 | ext4_handle_error(inode->i_sb); | |
555 | } | |
556 | ||
2b2d6d01 | 557 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
558 | char nbuf[16]) |
559 | { | |
560 | char *errstr = NULL; | |
561 | ||
562 | switch (errno) { | |
563 | case -EIO: | |
564 | errstr = "IO failure"; | |
565 | break; | |
566 | case -ENOMEM: | |
567 | errstr = "Out of memory"; | |
568 | break; | |
569 | case -EROFS: | |
78f1ddbb TT |
570 | if (!sb || (EXT4_SB(sb)->s_journal && |
571 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
572 | errstr = "Journal has aborted"; |
573 | else | |
574 | errstr = "Readonly filesystem"; | |
575 | break; | |
576 | default: | |
577 | /* If the caller passed in an extra buffer for unknown | |
578 | * errors, textualise them now. Else we just return | |
579 | * NULL. */ | |
580 | if (nbuf) { | |
581 | /* Check for truncated error codes... */ | |
582 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
583 | errstr = nbuf; | |
584 | } | |
585 | break; | |
586 | } | |
587 | ||
588 | return errstr; | |
589 | } | |
590 | ||
617ba13b | 591 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
592 | * automatically and invokes the appropriate error response. */ |
593 | ||
c398eda0 TT |
594 | void __ext4_std_error(struct super_block *sb, const char *function, |
595 | unsigned int line, int errno) | |
ac27a0ec DK |
596 | { |
597 | char nbuf[16]; | |
598 | const char *errstr; | |
599 | ||
600 | /* Special case: if the error is EROFS, and we're not already | |
601 | * inside a transaction, then there's really no point in logging | |
602 | * an error. */ | |
603 | if (errno == -EROFS && journal_current_handle() == NULL && | |
604 | (sb->s_flags & MS_RDONLY)) | |
605 | return; | |
606 | ||
617ba13b | 607 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
608 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
609 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 610 | save_error_info(sb, function, line); |
ac27a0ec | 611 | |
617ba13b | 612 | ext4_handle_error(sb); |
ac27a0ec DK |
613 | } |
614 | ||
615 | /* | |
617ba13b | 616 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
617 | * abort function may be used to deal with unrecoverable failures such |
618 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
619 | * | |
620 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
621 | * unless the error response on the fs has been set to panic in which | |
622 | * case we take the easy way out and panic immediately. | |
623 | */ | |
624 | ||
c67d859e | 625 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 626 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
627 | { |
628 | va_list args; | |
629 | ||
1c13d5c0 | 630 | save_error_info(sb, function, line); |
ac27a0ec | 631 | va_start(args, fmt); |
c398eda0 TT |
632 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
633 | function, line); | |
ac27a0ec DK |
634 | vprintk(fmt, args); |
635 | printk("\n"); | |
636 | va_end(args); | |
637 | ||
1c13d5c0 TT |
638 | if ((sb->s_flags & MS_RDONLY) == 0) { |
639 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
640 | sb->s_flags |= MS_RDONLY; | |
641 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
642 | if (EXT4_SB(sb)->s_journal) | |
643 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
644 | save_error_info(sb, function, line); | |
645 | } | |
ac27a0ec | 646 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 647 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
648 | } |
649 | ||
0ff2ea7d | 650 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 651 | { |
0ff2ea7d | 652 | struct va_format vaf; |
b31e1552 ES |
653 | va_list args; |
654 | ||
655 | va_start(args, fmt); | |
0ff2ea7d JP |
656 | vaf.fmt = fmt; |
657 | vaf.va = &args; | |
658 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
659 | va_end(args); |
660 | } | |
661 | ||
12062ddd | 662 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 663 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 664 | { |
0ff2ea7d | 665 | struct va_format vaf; |
ac27a0ec DK |
666 | va_list args; |
667 | ||
668 | va_start(args, fmt); | |
0ff2ea7d JP |
669 | vaf.fmt = fmt; |
670 | vaf.va = &args; | |
671 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
672 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
673 | va_end(args); |
674 | } | |
675 | ||
e29136f8 TT |
676 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
677 | struct super_block *sb, ext4_group_t grp, | |
678 | unsigned long ino, ext4_fsblk_t block, | |
679 | const char *fmt, ...) | |
5d1b1b3f AK |
680 | __releases(bitlock) |
681 | __acquires(bitlock) | |
682 | { | |
0ff2ea7d | 683 | struct va_format vaf; |
5d1b1b3f AK |
684 | va_list args; |
685 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
686 | ||
1c13d5c0 TT |
687 | es->s_last_error_ino = cpu_to_le32(ino); |
688 | es->s_last_error_block = cpu_to_le64(block); | |
689 | __save_error_info(sb, function, line); | |
0ff2ea7d | 690 | |
5d1b1b3f | 691 | va_start(args, fmt); |
0ff2ea7d JP |
692 | |
693 | vaf.fmt = fmt; | |
694 | vaf.va = &args; | |
21149d61 | 695 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
696 | sb->s_id, function, line, grp); |
697 | if (ino) | |
0ff2ea7d | 698 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 699 | if (block) |
0ff2ea7d JP |
700 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
701 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
702 | va_end(args); |
703 | ||
704 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 705 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
706 | return; |
707 | } | |
1c13d5c0 | 708 | |
5d1b1b3f AK |
709 | ext4_unlock_group(sb, grp); |
710 | ext4_handle_error(sb); | |
711 | /* | |
712 | * We only get here in the ERRORS_RO case; relocking the group | |
713 | * may be dangerous, but nothing bad will happen since the | |
714 | * filesystem will have already been marked read/only and the | |
715 | * journal has been aborted. We return 1 as a hint to callers | |
716 | * who might what to use the return value from | |
25985edc | 717 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
718 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
719 | * aggressively from the ext4 function in question, with a | |
720 | * more appropriate error code. | |
721 | */ | |
722 | ext4_lock_group(sb, grp); | |
723 | return; | |
724 | } | |
725 | ||
617ba13b | 726 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 727 | { |
617ba13b | 728 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 729 | |
617ba13b | 730 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
731 | return; |
732 | ||
12062ddd | 733 | ext4_warning(sb, |
ac27a0ec DK |
734 | "updating to rev %d because of new feature flag, " |
735 | "running e2fsck is recommended", | |
617ba13b | 736 | EXT4_DYNAMIC_REV); |
ac27a0ec | 737 | |
617ba13b MC |
738 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
739 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
740 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
741 | /* leave es->s_feature_*compat flags alone */ |
742 | /* es->s_uuid will be set by e2fsck if empty */ | |
743 | ||
744 | /* | |
745 | * The rest of the superblock fields should be zero, and if not it | |
746 | * means they are likely already in use, so leave them alone. We | |
747 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
748 | */ | |
749 | } | |
750 | ||
751 | /* | |
752 | * Open the external journal device | |
753 | */ | |
b31e1552 | 754 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
755 | { |
756 | struct block_device *bdev; | |
757 | char b[BDEVNAME_SIZE]; | |
758 | ||
d4d77629 | 759 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
760 | if (IS_ERR(bdev)) |
761 | goto fail; | |
762 | return bdev; | |
763 | ||
764 | fail: | |
b31e1552 | 765 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
766 | __bdevname(dev, b), PTR_ERR(bdev)); |
767 | return NULL; | |
768 | } | |
769 | ||
770 | /* | |
771 | * Release the journal device | |
772 | */ | |
617ba13b | 773 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 774 | { |
e525fd89 | 775 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
776 | } |
777 | ||
617ba13b | 778 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
779 | { |
780 | struct block_device *bdev; | |
781 | int ret = -ENODEV; | |
782 | ||
783 | bdev = sbi->journal_bdev; | |
784 | if (bdev) { | |
617ba13b | 785 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
786 | sbi->journal_bdev = NULL; |
787 | } | |
788 | return ret; | |
789 | } | |
790 | ||
791 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
792 | { | |
617ba13b | 793 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
794 | } |
795 | ||
617ba13b | 796 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
797 | { |
798 | struct list_head *l; | |
799 | ||
b31e1552 ES |
800 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
801 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
802 | |
803 | printk(KERN_ERR "sb_info orphan list:\n"); | |
804 | list_for_each(l, &sbi->s_orphan) { | |
805 | struct inode *inode = orphan_list_entry(l); | |
806 | printk(KERN_ERR " " | |
807 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
808 | inode->i_sb->s_id, inode->i_ino, inode, | |
809 | inode->i_mode, inode->i_nlink, | |
810 | NEXT_ORPHAN(inode)); | |
811 | } | |
812 | } | |
813 | ||
2b2d6d01 | 814 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 815 | { |
617ba13b MC |
816 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
817 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 818 | int i, err; |
ac27a0ec | 819 | |
857ac889 | 820 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
821 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
822 | ||
4c0425ff MC |
823 | flush_workqueue(sbi->dio_unwritten_wq); |
824 | destroy_workqueue(sbi->dio_unwritten_wq); | |
825 | ||
a9e220f8 | 826 | lock_super(sb); |
8c85e125 | 827 | if (sb->s_dirt) |
ebc1ac16 | 828 | ext4_commit_super(sb, 1); |
8c85e125 | 829 | |
0390131b FM |
830 | if (sbi->s_journal) { |
831 | err = jbd2_journal_destroy(sbi->s_journal); | |
832 | sbi->s_journal = NULL; | |
833 | if (err < 0) | |
c67d859e | 834 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 835 | } |
d4edac31 | 836 | |
a1c6c569 | 837 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
838 | ext4_release_system_zone(sb); |
839 | ext4_mb_release(sb); | |
840 | ext4_ext_release(sb); | |
841 | ext4_xattr_put_super(sb); | |
842 | ||
ac27a0ec | 843 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 844 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 845 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 846 | ext4_commit_super(sb, 1); |
ac27a0ec | 847 | } |
240799cd | 848 | if (sbi->s_proc) { |
9f6200bb | 849 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 850 | } |
3197ebdb | 851 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
852 | |
853 | for (i = 0; i < sbi->s_gdb_count; i++) | |
854 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 855 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 856 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 857 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
858 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
859 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 860 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
861 | brelse(sbi->s_sbh); |
862 | #ifdef CONFIG_QUOTA | |
863 | for (i = 0; i < MAXQUOTAS; i++) | |
864 | kfree(sbi->s_qf_names[i]); | |
865 | #endif | |
866 | ||
867 | /* Debugging code just in case the in-memory inode orphan list | |
868 | * isn't empty. The on-disk one can be non-empty if we've | |
869 | * detected an error and taken the fs readonly, but the | |
870 | * in-memory list had better be clean by this point. */ | |
871 | if (!list_empty(&sbi->s_orphan)) | |
872 | dump_orphan_list(sb, sbi); | |
873 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
874 | ||
f98393a6 | 875 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
876 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
877 | /* | |
878 | * Invalidate the journal device's buffers. We don't want them | |
879 | * floating about in memory - the physical journal device may | |
880 | * hotswapped, and it breaks the `ro-after' testing code. | |
881 | */ | |
882 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 883 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 884 | ext4_blkdev_remove(sbi); |
ac27a0ec | 885 | } |
c5e06d10 JL |
886 | if (sbi->s_mmp_tsk) |
887 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 888 | sb->s_fs_info = NULL; |
3197ebdb TT |
889 | /* |
890 | * Now that we are completely done shutting down the | |
891 | * superblock, we need to actually destroy the kobject. | |
892 | */ | |
3197ebdb TT |
893 | unlock_super(sb); |
894 | kobject_put(&sbi->s_kobj); | |
895 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 896 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 897 | kfree(sbi); |
ac27a0ec DK |
898 | } |
899 | ||
e18b890b | 900 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
901 | |
902 | /* | |
903 | * Called inside transaction, so use GFP_NOFS | |
904 | */ | |
617ba13b | 905 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 906 | { |
617ba13b | 907 | struct ext4_inode_info *ei; |
ac27a0ec | 908 | |
e6b4f8da | 909 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
910 | if (!ei) |
911 | return NULL; | |
0b8e58a1 | 912 | |
ac27a0ec | 913 | ei->vfs_inode.i_version = 1; |
91246c00 | 914 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 915 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
916 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
917 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
918 | ei->i_reserved_data_blocks = 0; |
919 | ei->i_reserved_meta_blocks = 0; | |
920 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 921 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 922 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
923 | #ifdef CONFIG_QUOTA |
924 | ei->i_reserved_quota = 0; | |
925 | #endif | |
8aefcd55 | 926 | ei->jinode = NULL; |
c7064ef1 | 927 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 928 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 929 | ei->cur_aio_dio = NULL; |
b436b9be JK |
930 | ei->i_sync_tid = 0; |
931 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 932 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 933 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 934 | |
ac27a0ec DK |
935 | return &ei->vfs_inode; |
936 | } | |
937 | ||
7ff9c073 TT |
938 | static int ext4_drop_inode(struct inode *inode) |
939 | { | |
940 | int drop = generic_drop_inode(inode); | |
941 | ||
942 | trace_ext4_drop_inode(inode, drop); | |
943 | return drop; | |
944 | } | |
945 | ||
fa0d7e3d NP |
946 | static void ext4_i_callback(struct rcu_head *head) |
947 | { | |
948 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
949 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
950 | } | |
951 | ||
617ba13b | 952 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 953 | { |
9f7dd93d | 954 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
955 | ext4_msg(inode->i_sb, KERN_ERR, |
956 | "Inode %lu (%p): orphan list check failed!", | |
957 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
958 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
959 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
960 | true); | |
961 | dump_stack(); | |
962 | } | |
fa0d7e3d | 963 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
964 | } |
965 | ||
51cc5068 | 966 | static void init_once(void *foo) |
ac27a0ec | 967 | { |
617ba13b | 968 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 969 | |
a35afb83 | 970 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 971 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 972 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 973 | #endif |
0e855ac8 | 974 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 975 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
976 | } |
977 | ||
978 | static int init_inodecache(void) | |
979 | { | |
617ba13b MC |
980 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
981 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
982 | 0, (SLAB_RECLAIM_ACCOUNT| |
983 | SLAB_MEM_SPREAD), | |
20c2df83 | 984 | init_once); |
617ba13b | 985 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
986 | return -ENOMEM; |
987 | return 0; | |
988 | } | |
989 | ||
990 | static void destroy_inodecache(void) | |
991 | { | |
617ba13b | 992 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
993 | } |
994 | ||
0930fcc1 | 995 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 996 | { |
0930fcc1 AV |
997 | invalidate_inode_buffers(inode); |
998 | end_writeback(inode); | |
9f754758 | 999 | dquot_drop(inode); |
c2ea3fde | 1000 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
1001 | if (EXT4_I(inode)->jinode) { |
1002 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1003 | EXT4_I(inode)->jinode); | |
1004 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1005 | EXT4_I(inode)->jinode = NULL; | |
1006 | } | |
ac27a0ec DK |
1007 | } |
1008 | ||
2b2d6d01 TT |
1009 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1010 | struct super_block *sb) | |
ac27a0ec DK |
1011 | { |
1012 | #if defined(CONFIG_QUOTA) | |
617ba13b | 1013 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 1014 | |
5a20bdfc JK |
1015 | if (sbi->s_jquota_fmt) { |
1016 | char *fmtname = ""; | |
1017 | ||
1018 | switch (sbi->s_jquota_fmt) { | |
1019 | case QFMT_VFS_OLD: | |
1020 | fmtname = "vfsold"; | |
1021 | break; | |
1022 | case QFMT_VFS_V0: | |
1023 | fmtname = "vfsv0"; | |
1024 | break; | |
1025 | case QFMT_VFS_V1: | |
1026 | fmtname = "vfsv1"; | |
1027 | break; | |
1028 | } | |
1029 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1030 | } | |
ac27a0ec DK |
1031 | |
1032 | if (sbi->s_qf_names[USRQUOTA]) | |
1033 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1034 | ||
1035 | if (sbi->s_qf_names[GRPQUOTA]) | |
1036 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1037 | ||
482a7425 | 1038 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
1039 | seq_puts(seq, ",usrquota"); |
1040 | ||
482a7425 | 1041 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
1042 | seq_puts(seq, ",grpquota"); |
1043 | #endif | |
1044 | } | |
1045 | ||
d9c9bef1 MS |
1046 | /* |
1047 | * Show an option if | |
1048 | * - it's set to a non-default value OR | |
1049 | * - if the per-sb default is different from the global default | |
1050 | */ | |
34c80b1d | 1051 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
ac27a0ec | 1052 | { |
aa22df2c AK |
1053 | int def_errors; |
1054 | unsigned long def_mount_opts; | |
34c80b1d | 1055 | struct super_block *sb = root->d_sb; |
d9c9bef1 MS |
1056 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1057 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
1058 | |
1059 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 1060 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
1061 | |
1062 | if (sbi->s_sb_block != 1) | |
1063 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
1064 | if (test_opt(sb, MINIX_DF)) | |
1065 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 1066 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
1067 | seq_puts(seq, ",grpid"); |
1068 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
1069 | seq_puts(seq, ",nogrpid"); | |
1070 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
1071 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
1072 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
1073 | } | |
1074 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
1075 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
1076 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
1077 | } | |
bb4f397a | 1078 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 1079 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
1080 | def_errors == EXT4_ERRORS_CONTINUE) { |
1081 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
1082 | } |
1083 | } | |
aa22df2c | 1084 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 1085 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 1086 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 1087 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 1088 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 1089 | seq_puts(seq, ",nouid32"); |
aa22df2c | 1090 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 | 1091 | seq_puts(seq, ",debug"); |
03010a33 | 1092 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 1093 | if (test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1094 | seq_puts(seq, ",user_xattr"); |
ea663336 | 1095 | if (!test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1096 | seq_puts(seq, ",nouser_xattr"); |
d9c9bef1 | 1097 | #endif |
03010a33 | 1098 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1099 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1100 | seq_puts(seq, ",acl"); |
1101 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1102 | seq_puts(seq, ",noacl"); | |
1103 | #endif | |
30773840 | 1104 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1105 | seq_printf(seq, ",commit=%u", |
1106 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1107 | } | |
30773840 TT |
1108 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1109 | seq_printf(seq, ",min_batch_time=%u", | |
1110 | (unsigned) sbi->s_min_batch_time); | |
1111 | } | |
1112 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1113 | seq_printf(seq, ",max_batch_time=%u", | |
1d526fc9 | 1114 | (unsigned) sbi->s_max_batch_time); |
30773840 TT |
1115 | } |
1116 | ||
571640ca ES |
1117 | /* |
1118 | * We're changing the default of barrier mount option, so | |
1119 | * let's always display its mount state so it's clear what its | |
1120 | * status is. | |
1121 | */ | |
1122 | seq_puts(seq, ",barrier="); | |
1123 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1124 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1125 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1126 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1127 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1128 | if (test_opt(sb, I_VERSION)) |
1129 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1130 | if (!test_opt(sb, DELALLOC) && |
1131 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1132 | seq_puts(seq, ",nodelalloc"); |
1133 | ||
6fd7a467 TT |
1134 | if (!test_opt(sb, MBLK_IO_SUBMIT)) |
1135 | seq_puts(seq, ",nomblk_io_submit"); | |
cb45bbe4 MS |
1136 | if (sbi->s_stripe) |
1137 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1138 | /* |
1139 | * journal mode get enabled in different ways | |
1140 | * So just print the value even if we didn't specify it | |
1141 | */ | |
617ba13b | 1142 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1143 | seq_puts(seq, ",data=journal"); |
617ba13b | 1144 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1145 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1146 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1147 | seq_puts(seq, ",data=writeback"); |
1148 | ||
240799cd TT |
1149 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1150 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1151 | sbi->s_inode_readahead_blks); | |
1152 | ||
5bf5683a HK |
1153 | if (test_opt(sb, DATA_ERR_ABORT)) |
1154 | seq_puts(seq, ",data_err=abort"); | |
1155 | ||
afd4672d | 1156 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1157 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1158 | |
8b67f04a | 1159 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1160 | seq_puts(seq, ",discard"); |
1161 | ||
e3bb52ae ES |
1162 | if (test_opt(sb, NOLOAD)) |
1163 | seq_puts(seq, ",norecovery"); | |
1164 | ||
744692dc JZ |
1165 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1166 | seq_puts(seq, ",dioread_nolock"); | |
1167 | ||
8b67f04a TT |
1168 | if (test_opt(sb, BLOCK_VALIDITY) && |
1169 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1170 | seq_puts(seq, ",block_validity"); | |
1171 | ||
bfff6873 | 1172 | if (!test_opt(sb, INIT_INODE_TABLE)) |
fc6cb1cd | 1173 | seq_puts(seq, ",noinit_itable"); |
51ce6511 | 1174 | else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) |
fc6cb1cd | 1175 | seq_printf(seq, ",init_itable=%u", |
bfff6873 LC |
1176 | (unsigned) sbi->s_li_wait_mult); |
1177 | ||
617ba13b | 1178 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1179 | |
ac27a0ec DK |
1180 | return 0; |
1181 | } | |
1182 | ||
1b961ac0 | 1183 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1184 | u64 ino, u32 generation) |
ac27a0ec | 1185 | { |
ac27a0ec | 1186 | struct inode *inode; |
ac27a0ec | 1187 | |
617ba13b | 1188 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1189 | return ERR_PTR(-ESTALE); |
617ba13b | 1190 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1191 | return ERR_PTR(-ESTALE); |
1192 | ||
1193 | /* iget isn't really right if the inode is currently unallocated!! | |
1194 | * | |
617ba13b | 1195 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1196 | * deleted, so we should be safe. |
1197 | * | |
1198 | * Currently we don't know the generation for parent directory, so | |
1199 | * a generation of 0 means "accept any" | |
1200 | */ | |
1d1fe1ee DH |
1201 | inode = ext4_iget(sb, ino); |
1202 | if (IS_ERR(inode)) | |
1203 | return ERR_CAST(inode); | |
1204 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1205 | iput(inode); |
1206 | return ERR_PTR(-ESTALE); | |
1207 | } | |
1b961ac0 CH |
1208 | |
1209 | return inode; | |
1210 | } | |
1211 | ||
1212 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1213 | int fh_len, int fh_type) |
1b961ac0 CH |
1214 | { |
1215 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1216 | ext4_nfs_get_inode); | |
1217 | } | |
1218 | ||
1219 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1220 | int fh_len, int fh_type) |
1b961ac0 CH |
1221 | { |
1222 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1223 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1224 | } |
1225 | ||
c39a7f84 TO |
1226 | /* |
1227 | * Try to release metadata pages (indirect blocks, directories) which are | |
1228 | * mapped via the block device. Since these pages could have journal heads | |
1229 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1230 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1231 | */ | |
0b8e58a1 AD |
1232 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1233 | gfp_t wait) | |
c39a7f84 TO |
1234 | { |
1235 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1236 | ||
1237 | WARN_ON(PageChecked(page)); | |
1238 | if (!page_has_buffers(page)) | |
1239 | return 0; | |
1240 | if (journal) | |
1241 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1242 | wait & ~__GFP_WAIT); | |
1243 | return try_to_free_buffers(page); | |
1244 | } | |
1245 | ||
ac27a0ec | 1246 | #ifdef CONFIG_QUOTA |
af5bc92d | 1247 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1248 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1249 | |
617ba13b MC |
1250 | static int ext4_write_dquot(struct dquot *dquot); |
1251 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1252 | static int ext4_release_dquot(struct dquot *dquot); | |
1253 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1254 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1255 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1256 | struct path *path); |
ca0e05e4 | 1257 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1258 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1259 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1260 | size_t len, loff_t off); |
617ba13b | 1261 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1262 | const char *data, size_t len, loff_t off); |
1263 | ||
61e225dc | 1264 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1265 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1266 | .write_dquot = ext4_write_dquot, |
1267 | .acquire_dquot = ext4_acquire_dquot, | |
1268 | .release_dquot = ext4_release_dquot, | |
1269 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1270 | .write_info = ext4_write_info, |
1271 | .alloc_dquot = dquot_alloc, | |
1272 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1273 | }; |
1274 | ||
0d54b217 | 1275 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1276 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1277 | .quota_off = ext4_quota_off, |
287a8095 CH |
1278 | .quota_sync = dquot_quota_sync, |
1279 | .get_info = dquot_get_dqinfo, | |
1280 | .set_info = dquot_set_dqinfo, | |
1281 | .get_dqblk = dquot_get_dqblk, | |
1282 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1283 | }; |
1284 | #endif | |
1285 | ||
ee9b6d61 | 1286 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1287 | .alloc_inode = ext4_alloc_inode, |
1288 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1289 | .write_inode = ext4_write_inode, |
1290 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1291 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1292 | .evict_inode = ext4_evict_inode, |
617ba13b | 1293 | .put_super = ext4_put_super, |
617ba13b | 1294 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1295 | .freeze_fs = ext4_freeze, |
1296 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1297 | .statfs = ext4_statfs, |
1298 | .remount_fs = ext4_remount, | |
617ba13b | 1299 | .show_options = ext4_show_options, |
ac27a0ec | 1300 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1301 | .quota_read = ext4_quota_read, |
1302 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1303 | #endif |
c39a7f84 | 1304 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1305 | }; |
1306 | ||
9ca92389 TT |
1307 | static const struct super_operations ext4_nojournal_sops = { |
1308 | .alloc_inode = ext4_alloc_inode, | |
1309 | .destroy_inode = ext4_destroy_inode, | |
1310 | .write_inode = ext4_write_inode, | |
1311 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1312 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1313 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1314 | .write_super = ext4_write_super, |
1315 | .put_super = ext4_put_super, | |
1316 | .statfs = ext4_statfs, | |
1317 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1318 | .show_options = ext4_show_options, |
1319 | #ifdef CONFIG_QUOTA | |
1320 | .quota_read = ext4_quota_read, | |
1321 | .quota_write = ext4_quota_write, | |
1322 | #endif | |
1323 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1324 | }; | |
1325 | ||
39655164 | 1326 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1327 | .fh_to_dentry = ext4_fh_to_dentry, |
1328 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1329 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1330 | }; |
1331 | ||
1332 | enum { | |
1333 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1334 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1335 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1336 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1337 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1338 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
43e625d8 | 1339 | Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1340 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1341 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1342 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1343 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1344 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
661aa520 | 1345 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
1449032b TT |
1346 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1347 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1348 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1349 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1350 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
ac27a0ec DK |
1351 | }; |
1352 | ||
a447c093 | 1353 | static const match_table_t tokens = { |
ac27a0ec DK |
1354 | {Opt_bsd_df, "bsddf"}, |
1355 | {Opt_minix_df, "minixdf"}, | |
1356 | {Opt_grpid, "grpid"}, | |
1357 | {Opt_grpid, "bsdgroups"}, | |
1358 | {Opt_nogrpid, "nogrpid"}, | |
1359 | {Opt_nogrpid, "sysvgroups"}, | |
1360 | {Opt_resgid, "resgid=%u"}, | |
1361 | {Opt_resuid, "resuid=%u"}, | |
1362 | {Opt_sb, "sb=%u"}, | |
1363 | {Opt_err_cont, "errors=continue"}, | |
1364 | {Opt_err_panic, "errors=panic"}, | |
1365 | {Opt_err_ro, "errors=remount-ro"}, | |
1366 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1367 | {Opt_debug, "debug"}, |
1368 | {Opt_oldalloc, "oldalloc"}, | |
1369 | {Opt_orlov, "orlov"}, | |
1370 | {Opt_user_xattr, "user_xattr"}, | |
1371 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1372 | {Opt_acl, "acl"}, | |
1373 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1374 | {Opt_noload, "noload"}, |
e3bb52ae | 1375 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1376 | {Opt_nobh, "nobh"}, |
1377 | {Opt_bh, "bh"}, | |
1378 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1379 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1380 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1381 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1382 | {Opt_journal_checksum, "journal_checksum"}, |
1383 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1384 | {Opt_abort, "abort"}, |
1385 | {Opt_data_journal, "data=journal"}, | |
1386 | {Opt_data_ordered, "data=ordered"}, | |
1387 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1388 | {Opt_data_err_abort, "data_err=abort"}, |
1389 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1390 | {Opt_offusrjquota, "usrjquota="}, |
1391 | {Opt_usrjquota, "usrjquota=%s"}, | |
1392 | {Opt_offgrpjquota, "grpjquota="}, | |
1393 | {Opt_grpjquota, "grpjquota=%s"}, | |
1394 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1395 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1396 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1397 | {Opt_grpquota, "grpquota"}, |
1398 | {Opt_noquota, "noquota"}, | |
1399 | {Opt_quota, "quota"}, | |
1400 | {Opt_usrquota, "usrquota"}, | |
1401 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1402 | {Opt_barrier, "barrier"}, |
1403 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1404 | {Opt_i_version, "i_version"}, |
c9de560d | 1405 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1406 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1407 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1408 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1409 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1410 | {Opt_block_validity, "block_validity"}, |
1411 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1412 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1413 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1414 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1415 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1416 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1417 | {Opt_dioread_nolock, "dioread_nolock"}, |
1418 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1419 | {Opt_discard, "discard"}, |
1420 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1421 | {Opt_init_itable, "init_itable=%u"}, |
1422 | {Opt_init_itable, "init_itable"}, | |
1423 | {Opt_noinit_itable, "noinit_itable"}, | |
f3f12faa | 1424 | {Opt_err, NULL}, |
ac27a0ec DK |
1425 | }; |
1426 | ||
617ba13b | 1427 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1428 | { |
617ba13b | 1429 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1430 | char *options = (char *) *data; |
1431 | ||
1432 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1433 | return 1; /* Default location */ | |
0b8e58a1 | 1434 | |
ac27a0ec | 1435 | options += 3; |
0b8e58a1 | 1436 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1437 | sb_block = simple_strtoul(options, &options, 0); |
1438 | if (*options && *options != ',') { | |
4776004f | 1439 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1440 | (char *) *data); |
1441 | return 1; | |
1442 | } | |
1443 | if (*options == ',') | |
1444 | options++; | |
1445 | *data = (void *) options; | |
0b8e58a1 | 1446 | |
ac27a0ec DK |
1447 | return sb_block; |
1448 | } | |
1449 | ||
b3881f74 | 1450 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1451 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1452 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1453 | |
56c50f11 DM |
1454 | #ifdef CONFIG_QUOTA |
1455 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1456 | { | |
1457 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1458 | char *qname; | |
1459 | ||
1460 | if (sb_any_quota_loaded(sb) && | |
1461 | !sbi->s_qf_names[qtype]) { | |
1462 | ext4_msg(sb, KERN_ERR, | |
1463 | "Cannot change journaled " | |
1464 | "quota options when quota turned on"); | |
1465 | return 0; | |
1466 | } | |
1467 | qname = match_strdup(args); | |
1468 | if (!qname) { | |
1469 | ext4_msg(sb, KERN_ERR, | |
1470 | "Not enough memory for storing quotafile name"); | |
1471 | return 0; | |
1472 | } | |
1473 | if (sbi->s_qf_names[qtype] && | |
1474 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1475 | ext4_msg(sb, KERN_ERR, | |
1476 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1477 | kfree(qname); | |
1478 | return 0; | |
1479 | } | |
1480 | sbi->s_qf_names[qtype] = qname; | |
1481 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1482 | ext4_msg(sb, KERN_ERR, | |
1483 | "quotafile must be on filesystem root"); | |
1484 | kfree(sbi->s_qf_names[qtype]); | |
1485 | sbi->s_qf_names[qtype] = NULL; | |
1486 | return 0; | |
1487 | } | |
fd8c37ec | 1488 | set_opt(sb, QUOTA); |
56c50f11 DM |
1489 | return 1; |
1490 | } | |
1491 | ||
1492 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1493 | { | |
1494 | ||
1495 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1496 | ||
1497 | if (sb_any_quota_loaded(sb) && | |
1498 | sbi->s_qf_names[qtype]) { | |
1499 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1500 | " when quota turned on"); | |
1501 | return 0; | |
1502 | } | |
1503 | /* | |
1504 | * The space will be released later when all options are confirmed | |
1505 | * to be correct | |
1506 | */ | |
1507 | sbi->s_qf_names[qtype] = NULL; | |
1508 | return 1; | |
1509 | } | |
1510 | #endif | |
1511 | ||
2b2d6d01 | 1512 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1513 | unsigned long *journal_devnum, |
b3881f74 | 1514 | unsigned int *journal_ioprio, |
661aa520 | 1515 | int is_remount) |
ac27a0ec | 1516 | { |
617ba13b | 1517 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1518 | char *p; |
ac27a0ec DK |
1519 | substring_t args[MAX_OPT_ARGS]; |
1520 | int data_opt = 0; | |
1521 | int option; | |
1522 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1523 | int qfmt; |
ac27a0ec DK |
1524 | #endif |
1525 | ||
1526 | if (!options) | |
1527 | return 1; | |
1528 | ||
2b2d6d01 | 1529 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1530 | int token; |
1531 | if (!*p) | |
1532 | continue; | |
1533 | ||
15121c18 ES |
1534 | /* |
1535 | * Initialize args struct so we know whether arg was | |
1536 | * found; some options take optional arguments. | |
1537 | */ | |
7dc57615 | 1538 | args[0].to = args[0].from = NULL; |
ac27a0ec DK |
1539 | token = match_token(p, tokens, args); |
1540 | switch (token) { | |
1541 | case Opt_bsd_df: | |
437ca0fd | 1542 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1543 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1544 | break; |
1545 | case Opt_minix_df: | |
437ca0fd | 1546 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1547 | set_opt(sb, MINIX_DF); |
437ca0fd | 1548 | |
ac27a0ec DK |
1549 | break; |
1550 | case Opt_grpid: | |
437ca0fd | 1551 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1552 | set_opt(sb, GRPID); |
437ca0fd | 1553 | |
ac27a0ec DK |
1554 | break; |
1555 | case Opt_nogrpid: | |
437ca0fd | 1556 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1557 | clear_opt(sb, GRPID); |
437ca0fd | 1558 | |
ac27a0ec DK |
1559 | break; |
1560 | case Opt_resuid: | |
1561 | if (match_int(&args[0], &option)) | |
1562 | return 0; | |
1563 | sbi->s_resuid = option; | |
1564 | break; | |
1565 | case Opt_resgid: | |
1566 | if (match_int(&args[0], &option)) | |
1567 | return 0; | |
1568 | sbi->s_resgid = option; | |
1569 | break; | |
1570 | case Opt_sb: | |
1571 | /* handled by get_sb_block() instead of here */ | |
1572 | /* *sb_block = match_int(&args[0]); */ | |
1573 | break; | |
1574 | case Opt_err_panic: | |
fd8c37ec TT |
1575 | clear_opt(sb, ERRORS_CONT); |
1576 | clear_opt(sb, ERRORS_RO); | |
1577 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1578 | break; |
1579 | case Opt_err_ro: | |
fd8c37ec TT |
1580 | clear_opt(sb, ERRORS_CONT); |
1581 | clear_opt(sb, ERRORS_PANIC); | |
1582 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1583 | break; |
1584 | case Opt_err_cont: | |
fd8c37ec TT |
1585 | clear_opt(sb, ERRORS_RO); |
1586 | clear_opt(sb, ERRORS_PANIC); | |
1587 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1588 | break; |
1589 | case Opt_nouid32: | |
fd8c37ec | 1590 | set_opt(sb, NO_UID32); |
ac27a0ec | 1591 | break; |
ac27a0ec | 1592 | case Opt_debug: |
fd8c37ec | 1593 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1594 | break; |
1595 | case Opt_oldalloc: | |
4113c4ca LC |
1596 | ext4_msg(sb, KERN_WARNING, |
1597 | "Ignoring deprecated oldalloc option"); | |
ac27a0ec DK |
1598 | break; |
1599 | case Opt_orlov: | |
4113c4ca LC |
1600 | ext4_msg(sb, KERN_WARNING, |
1601 | "Ignoring deprecated orlov option"); | |
ac27a0ec | 1602 | break; |
03010a33 | 1603 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1604 | case Opt_user_xattr: |
fd8c37ec | 1605 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1606 | break; |
1607 | case Opt_nouser_xattr: | |
fd8c37ec | 1608 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1609 | break; |
1610 | #else | |
1611 | case Opt_user_xattr: | |
1612 | case Opt_nouser_xattr: | |
b31e1552 | 1613 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1614 | break; |
1615 | #endif | |
03010a33 | 1616 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1617 | case Opt_acl: |
fd8c37ec | 1618 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1619 | break; |
1620 | case Opt_noacl: | |
fd8c37ec | 1621 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1622 | break; |
1623 | #else | |
1624 | case Opt_acl: | |
1625 | case Opt_noacl: | |
b31e1552 | 1626 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1627 | break; |
1628 | #endif | |
ac27a0ec DK |
1629 | case Opt_journal_dev: |
1630 | if (is_remount) { | |
b31e1552 ES |
1631 | ext4_msg(sb, KERN_ERR, |
1632 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1633 | return 0; |
1634 | } | |
1635 | if (match_int(&args[0], &option)) | |
1636 | return 0; | |
1637 | *journal_devnum = option; | |
1638 | break; | |
818d276c | 1639 | case Opt_journal_checksum: |
fd8c37ec | 1640 | set_opt(sb, JOURNAL_CHECKSUM); |
d4da6c9c | 1641 | break; |
818d276c | 1642 | case Opt_journal_async_commit: |
fd8c37ec TT |
1643 | set_opt(sb, JOURNAL_ASYNC_COMMIT); |
1644 | set_opt(sb, JOURNAL_CHECKSUM); | |
818d276c | 1645 | break; |
ac27a0ec | 1646 | case Opt_noload: |
fd8c37ec | 1647 | set_opt(sb, NOLOAD); |
ac27a0ec DK |
1648 | break; |
1649 | case Opt_commit: | |
1650 | if (match_int(&args[0], &option)) | |
1651 | return 0; | |
1652 | if (option < 0) | |
1653 | return 0; | |
1654 | if (option == 0) | |
cd02ff0b | 1655 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1656 | sbi->s_commit_interval = HZ * option; |
1657 | break; | |
30773840 TT |
1658 | case Opt_max_batch_time: |
1659 | if (match_int(&args[0], &option)) | |
1660 | return 0; | |
1661 | if (option < 0) | |
1662 | return 0; | |
1663 | if (option == 0) | |
1664 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1665 | sbi->s_max_batch_time = option; | |
1666 | break; | |
1667 | case Opt_min_batch_time: | |
1668 | if (match_int(&args[0], &option)) | |
1669 | return 0; | |
1670 | if (option < 0) | |
1671 | return 0; | |
1672 | sbi->s_min_batch_time = option; | |
1673 | break; | |
ac27a0ec | 1674 | case Opt_data_journal: |
617ba13b | 1675 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1676 | goto datacheck; |
1677 | case Opt_data_ordered: | |
617ba13b | 1678 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1679 | goto datacheck; |
1680 | case Opt_data_writeback: | |
617ba13b | 1681 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1682 | datacheck: |
1683 | if (is_remount) { | |
eb513689 TT |
1684 | if (!sbi->s_journal) |
1685 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1686 | else if (test_opt(sb, DATA_FLAGS) != data_opt) { | |
b31e1552 ES |
1687 | ext4_msg(sb, KERN_ERR, |
1688 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1689 | return 0; |
1690 | } | |
1691 | } else { | |
fd8c37ec | 1692 | clear_opt(sb, DATA_FLAGS); |
ac27a0ec DK |
1693 | sbi->s_mount_opt |= data_opt; |
1694 | } | |
1695 | break; | |
5bf5683a | 1696 | case Opt_data_err_abort: |
fd8c37ec | 1697 | set_opt(sb, DATA_ERR_ABORT); |
5bf5683a HK |
1698 | break; |
1699 | case Opt_data_err_ignore: | |
fd8c37ec | 1700 | clear_opt(sb, DATA_ERR_ABORT); |
5bf5683a | 1701 | break; |
ac27a0ec DK |
1702 | #ifdef CONFIG_QUOTA |
1703 | case Opt_usrjquota: | |
56c50f11 | 1704 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1705 | return 0; |
56c50f11 DM |
1706 | break; |
1707 | case Opt_grpjquota: | |
1708 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1709 | return 0; |
ac27a0ec DK |
1710 | break; |
1711 | case Opt_offusrjquota: | |
56c50f11 DM |
1712 | if (!clear_qf_name(sb, USRQUOTA)) |
1713 | return 0; | |
1714 | break; | |
ac27a0ec | 1715 | case Opt_offgrpjquota: |
56c50f11 | 1716 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1717 | return 0; |
ac27a0ec | 1718 | break; |
56c50f11 | 1719 | |
ac27a0ec | 1720 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1721 | qfmt = QFMT_VFS_OLD; |
1722 | goto set_qf_format; | |
ac27a0ec | 1723 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1724 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1725 | goto set_qf_format; |
1726 | case Opt_jqfmt_vfsv1: | |
1727 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1728 | set_qf_format: |
17bd13b3 | 1729 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1730 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1731 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1732 | "journaled quota options when " |
b31e1552 | 1733 | "quota turned on"); |
dfc5d03f JK |
1734 | return 0; |
1735 | } | |
1736 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1737 | break; |
1738 | case Opt_quota: | |
1739 | case Opt_usrquota: | |
fd8c37ec TT |
1740 | set_opt(sb, QUOTA); |
1741 | set_opt(sb, USRQUOTA); | |
ac27a0ec DK |
1742 | break; |
1743 | case Opt_grpquota: | |
fd8c37ec TT |
1744 | set_opt(sb, QUOTA); |
1745 | set_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1746 | break; |
1747 | case Opt_noquota: | |
17bd13b3 | 1748 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1749 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1750 | "options when quota turned on"); | |
ac27a0ec DK |
1751 | return 0; |
1752 | } | |
fd8c37ec TT |
1753 | clear_opt(sb, QUOTA); |
1754 | clear_opt(sb, USRQUOTA); | |
1755 | clear_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1756 | break; |
1757 | #else | |
1758 | case Opt_quota: | |
1759 | case Opt_usrquota: | |
1760 | case Opt_grpquota: | |
b31e1552 ES |
1761 | ext4_msg(sb, KERN_ERR, |
1762 | "quota options not supported"); | |
cd59e7b9 | 1763 | break; |
ac27a0ec DK |
1764 | case Opt_usrjquota: |
1765 | case Opt_grpjquota: | |
1766 | case Opt_offusrjquota: | |
1767 | case Opt_offgrpjquota: | |
1768 | case Opt_jqfmt_vfsold: | |
1769 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1770 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1771 | ext4_msg(sb, KERN_ERR, |
1772 | "journaled quota options not supported"); | |
ac27a0ec DK |
1773 | break; |
1774 | case Opt_noquota: | |
1775 | break; | |
1776 | #endif | |
1777 | case Opt_abort: | |
4ab2f15b | 1778 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1779 | break; |
06705bff | 1780 | case Opt_nobarrier: |
fd8c37ec | 1781 | clear_opt(sb, BARRIER); |
06705bff | 1782 | break; |
ac27a0ec | 1783 | case Opt_barrier: |
15121c18 ES |
1784 | if (args[0].from) { |
1785 | if (match_int(&args[0], &option)) | |
1786 | return 0; | |
1787 | } else | |
1788 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec | 1789 | if (option) |
fd8c37ec | 1790 | set_opt(sb, BARRIER); |
ac27a0ec | 1791 | else |
fd8c37ec | 1792 | clear_opt(sb, BARRIER); |
ac27a0ec DK |
1793 | break; |
1794 | case Opt_ignore: | |
1795 | break; | |
ac27a0ec | 1796 | case Opt_nobh: |
206f7ab4 CH |
1797 | ext4_msg(sb, KERN_WARNING, |
1798 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1799 | break; |
1800 | case Opt_bh: | |
206f7ab4 CH |
1801 | ext4_msg(sb, KERN_WARNING, |
1802 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1803 | break; |
25ec56b5 | 1804 | case Opt_i_version: |
fd8c37ec | 1805 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1806 | sb->s_flags |= MS_I_VERSION; |
1807 | break; | |
dd919b98 | 1808 | case Opt_nodelalloc: |
fd8c37ec | 1809 | clear_opt(sb, DELALLOC); |
56889787 | 1810 | clear_opt2(sb, EXPLICIT_DELALLOC); |
dd919b98 | 1811 | break; |
1449032b | 1812 | case Opt_mblk_io_submit: |
fd8c37ec | 1813 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1814 | break; |
1815 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1816 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1817 | break; |
c9de560d AT |
1818 | case Opt_stripe: |
1819 | if (match_int(&args[0], &option)) | |
1820 | return 0; | |
1821 | if (option < 0) | |
1822 | return 0; | |
1823 | sbi->s_stripe = option; | |
1824 | break; | |
64769240 | 1825 | case Opt_delalloc: |
fd8c37ec | 1826 | set_opt(sb, DELALLOC); |
56889787 | 1827 | set_opt2(sb, EXPLICIT_DELALLOC); |
64769240 | 1828 | break; |
6fd058f7 | 1829 | case Opt_block_validity: |
fd8c37ec | 1830 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1831 | break; |
1832 | case Opt_noblock_validity: | |
fd8c37ec | 1833 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1834 | break; |
240799cd TT |
1835 | case Opt_inode_readahead_blks: |
1836 | if (match_int(&args[0], &option)) | |
1837 | return 0; | |
1838 | if (option < 0 || option > (1 << 30)) | |
1839 | return 0; | |
5dbd571d | 1840 | if (option && !is_power_of_2(option)) { |
b31e1552 ES |
1841 | ext4_msg(sb, KERN_ERR, |
1842 | "EXT4-fs: inode_readahead_blks" | |
1843 | " must be a power of 2"); | |
3197ebdb TT |
1844 | return 0; |
1845 | } | |
240799cd TT |
1846 | sbi->s_inode_readahead_blks = option; |
1847 | break; | |
b3881f74 TT |
1848 | case Opt_journal_ioprio: |
1849 | if (match_int(&args[0], &option)) | |
1850 | return 0; | |
1851 | if (option < 0 || option > 7) | |
1852 | break; | |
1853 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1854 | option); | |
1855 | break; | |
06705bff | 1856 | case Opt_noauto_da_alloc: |
fd8c37ec | 1857 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1858 | break; |
afd4672d | 1859 | case Opt_auto_da_alloc: |
15121c18 ES |
1860 | if (args[0].from) { |
1861 | if (match_int(&args[0], &option)) | |
1862 | return 0; | |
1863 | } else | |
1864 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1865 | if (option) |
fd8c37ec | 1866 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1867 | else |
fd8c37ec | 1868 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1869 | break; |
5328e635 | 1870 | case Opt_discard: |
fd8c37ec | 1871 | set_opt(sb, DISCARD); |
5328e635 ES |
1872 | break; |
1873 | case Opt_nodiscard: | |
fd8c37ec | 1874 | clear_opt(sb, DISCARD); |
5328e635 | 1875 | break; |
744692dc | 1876 | case Opt_dioread_nolock: |
fd8c37ec | 1877 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1878 | break; |
1879 | case Opt_dioread_lock: | |
fd8c37ec | 1880 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1881 | break; |
fc6cb1cd | 1882 | case Opt_init_itable: |
fd8c37ec | 1883 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1884 | if (args[0].from) { |
1885 | if (match_int(&args[0], &option)) | |
1886 | return 0; | |
1887 | } else | |
1888 | option = EXT4_DEF_LI_WAIT_MULT; | |
1889 | if (option < 0) | |
1890 | return 0; | |
1891 | sbi->s_li_wait_mult = option; | |
1892 | break; | |
fc6cb1cd | 1893 | case Opt_noinit_itable: |
fd8c37ec | 1894 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1895 | break; |
ac27a0ec | 1896 | default: |
b31e1552 ES |
1897 | ext4_msg(sb, KERN_ERR, |
1898 | "Unrecognized mount option \"%s\" " | |
1899 | "or missing value", p); | |
ac27a0ec DK |
1900 | return 0; |
1901 | } | |
1902 | } | |
1903 | #ifdef CONFIG_QUOTA | |
1904 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1905 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1906 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1907 | |
482a7425 | 1908 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1909 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1910 | |
56c50f11 | 1911 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1912 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1913 | "format mixing"); | |
ac27a0ec DK |
1914 | return 0; |
1915 | } | |
1916 | ||
1917 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1918 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1919 | "not specified"); | |
ac27a0ec DK |
1920 | return 0; |
1921 | } | |
1922 | } else { | |
1923 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1924 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1925 | "specified with no journaling " |
b31e1552 | 1926 | "enabled"); |
ac27a0ec DK |
1927 | return 0; |
1928 | } | |
1929 | } | |
1930 | #endif | |
1931 | return 1; | |
1932 | } | |
1933 | ||
617ba13b | 1934 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1935 | int read_only) |
1936 | { | |
617ba13b | 1937 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1938 | int res = 0; |
1939 | ||
617ba13b | 1940 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1941 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1942 | "forcing read-only mode"); | |
ac27a0ec DK |
1943 | res = MS_RDONLY; |
1944 | } | |
1945 | if (read_only) | |
281b5995 | 1946 | goto done; |
617ba13b | 1947 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1948 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1949 | "running e2fsck is recommended"); | |
617ba13b | 1950 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1951 | ext4_msg(sb, KERN_WARNING, |
1952 | "warning: mounting fs with errors, " | |
1953 | "running e2fsck is recommended"); | |
ed3ce80a | 1954 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1955 | le16_to_cpu(es->s_mnt_count) >= |
1956 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1957 | ext4_msg(sb, KERN_WARNING, |
1958 | "warning: maximal mount count reached, " | |
1959 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1960 | else if (le32_to_cpu(es->s_checkinterval) && |
1961 | (le32_to_cpu(es->s_lastcheck) + | |
1962 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1963 | ext4_msg(sb, KERN_WARNING, |
1964 | "warning: checktime reached, " | |
1965 | "running e2fsck is recommended"); | |
0b8e58a1 | 1966 | if (!sbi->s_journal) |
0390131b | 1967 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1968 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1969 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1970 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1971 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1972 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1973 | if (sbi->s_journal) |
1974 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1975 | |
e2d67052 | 1976 | ext4_commit_super(sb, 1); |
281b5995 | 1977 | done: |
ac27a0ec | 1978 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1979 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1980 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1981 | sb->s_blocksize, |
1982 | sbi->s_groups_count, | |
617ba13b MC |
1983 | EXT4_BLOCKS_PER_GROUP(sb), |
1984 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1985 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1986 | |
7abc52c2 | 1987 | cleancache_init_fs(sb); |
ac27a0ec DK |
1988 | return res; |
1989 | } | |
1990 | ||
772cb7c8 JS |
1991 | static int ext4_fill_flex_info(struct super_block *sb) |
1992 | { | |
1993 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1994 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1995 | ext4_group_t flex_group_count; |
1996 | ext4_group_t flex_group; | |
d50f2ab6 | 1997 | unsigned int groups_per_flex = 0; |
c5ca7c76 | 1998 | size_t size; |
772cb7c8 JS |
1999 | int i; |
2000 | ||
503358ae | 2001 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2002 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2003 | sbi->s_log_groups_per_flex = 0; |
2004 | return 1; | |
2005 | } | |
d50f2ab6 | 2006 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
772cb7c8 | 2007 | |
c62a11fd FB |
2008 | /* We allocate both existing and potentially added groups */ |
2009 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
2010 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
2011 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 | 2012 | size = flex_group_count * sizeof(struct flex_groups); |
9933fc0a | 2013 | sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); |
c5ca7c76 | 2014 | if (sbi->s_flex_groups == NULL) { |
9933fc0a TT |
2015 | ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", |
2016 | flex_group_count); | |
2017 | goto failed; | |
772cb7c8 | 2018 | } |
772cb7c8 | 2019 | |
772cb7c8 | 2020 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2021 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2022 | |
2023 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2024 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2025 | &sbi->s_flex_groups[flex_group].free_inodes); | |
021b65bb | 2026 | atomic_add(ext4_free_group_clusters(sb, gdp), |
24aaa8ef | 2027 | &sbi->s_flex_groups[flex_group].free_clusters); |
7ad9bb65 TT |
2028 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2029 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2030 | } |
2031 | ||
2032 | return 1; | |
2033 | failed: | |
2034 | return 0; | |
2035 | } | |
2036 | ||
717d50e4 AD |
2037 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
2038 | struct ext4_group_desc *gdp) | |
2039 | { | |
2040 | __u16 crc = 0; | |
2041 | ||
2042 | if (sbi->s_es->s_feature_ro_compat & | |
2043 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
2044 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2045 | __le32 le_group = cpu_to_le32(block_group); | |
2046 | ||
2047 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2048 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2049 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2050 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2051 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2052 | if ((sbi->s_es->s_feature_incompat & | |
2053 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2054 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2055 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2056 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2057 | offset); | |
2058 | } | |
2059 | ||
2060 | return cpu_to_le16(crc); | |
2061 | } | |
2062 | ||
2063 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
2064 | struct ext4_group_desc *gdp) | |
2065 | { | |
2066 | if ((sbi->s_es->s_feature_ro_compat & | |
2067 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
2068 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2069 | return 0; | |
2070 | ||
2071 | return 1; | |
2072 | } | |
2073 | ||
ac27a0ec | 2074 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2075 | static int ext4_check_descriptors(struct super_block *sb, |
2076 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2077 | { |
617ba13b MC |
2078 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2079 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2080 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2081 | ext4_fsblk_t block_bitmap; |
2082 | ext4_fsblk_t inode_bitmap; | |
2083 | ext4_fsblk_t inode_table; | |
ce421581 | 2084 | int flexbg_flag = 0; |
bfff6873 | 2085 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2086 | |
ce421581 JS |
2087 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2088 | flexbg_flag = 1; | |
2089 | ||
af5bc92d | 2090 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2091 | |
197cd65a AM |
2092 | for (i = 0; i < sbi->s_groups_count; i++) { |
2093 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2094 | ||
ce421581 | 2095 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2096 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2097 | else |
2098 | last_block = first_block + | |
617ba13b | 2099 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2100 | |
bfff6873 LC |
2101 | if ((grp == sbi->s_groups_count) && |
2102 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2103 | grp = i; | |
2104 | ||
8fadc143 | 2105 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2106 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2107 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2108 | "Block bitmap for group %u not in group " |
b31e1552 | 2109 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2110 | return 0; |
2111 | } | |
8fadc143 | 2112 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2113 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2114 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2115 | "Inode bitmap for group %u not in group " |
b31e1552 | 2116 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2117 | return 0; |
2118 | } | |
8fadc143 | 2119 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2120 | if (inode_table < first_block || |
2b2d6d01 | 2121 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2122 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2123 | "Inode table for group %u not in group " |
b31e1552 | 2124 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2125 | return 0; |
2126 | } | |
955ce5f5 | 2127 | ext4_lock_group(sb, i); |
717d50e4 | 2128 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2129 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2130 | "Checksum for group %u failed (%u!=%u)", | |
2131 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2132 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2133 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2134 | ext4_unlock_group(sb, i); |
8a266467 | 2135 | return 0; |
7ee1ec4c | 2136 | } |
717d50e4 | 2137 | } |
955ce5f5 | 2138 | ext4_unlock_group(sb, i); |
ce421581 JS |
2139 | if (!flexbg_flag) |
2140 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2141 | } |
bfff6873 LC |
2142 | if (NULL != first_not_zeroed) |
2143 | *first_not_zeroed = grp; | |
ac27a0ec | 2144 | |
5dee5437 TT |
2145 | ext4_free_blocks_count_set(sbi->s_es, |
2146 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2147 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2148 | return 1; |
2149 | } | |
2150 | ||
617ba13b | 2151 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2152 | * the superblock) which were deleted from all directories, but held open by |
2153 | * a process at the time of a crash. We walk the list and try to delete these | |
2154 | * inodes at recovery time (only with a read-write filesystem). | |
2155 | * | |
2156 | * In order to keep the orphan inode chain consistent during traversal (in | |
2157 | * case of crash during recovery), we link each inode into the superblock | |
2158 | * orphan list_head and handle it the same way as an inode deletion during | |
2159 | * normal operation (which journals the operations for us). | |
2160 | * | |
2161 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2162 | * accidentally point at an in-use or already deleted inode. The worst that | |
2163 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2164 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2165 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2166 | * inode cleanup for us, so we can safely abort without any further action. | |
2167 | */ | |
2b2d6d01 TT |
2168 | static void ext4_orphan_cleanup(struct super_block *sb, |
2169 | struct ext4_super_block *es) | |
ac27a0ec DK |
2170 | { |
2171 | unsigned int s_flags = sb->s_flags; | |
2172 | int nr_orphans = 0, nr_truncates = 0; | |
2173 | #ifdef CONFIG_QUOTA | |
2174 | int i; | |
2175 | #endif | |
2176 | if (!es->s_last_orphan) { | |
2177 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2178 | return; | |
2179 | } | |
2180 | ||
a8f48a95 | 2181 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2182 | ext4_msg(sb, KERN_ERR, "write access " |
2183 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2184 | return; |
2185 | } | |
2186 | ||
d39195c3 AG |
2187 | /* Check if feature set would not allow a r/w mount */ |
2188 | if (!ext4_feature_set_ok(sb, 0)) { | |
2189 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2190 | "unknown ROCOMPAT features"); | |
2191 | return; | |
2192 | } | |
2193 | ||
617ba13b | 2194 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2195 | if (es->s_last_orphan) |
2196 | jbd_debug(1, "Errors on filesystem, " | |
2197 | "clearing orphan list.\n"); | |
2198 | es->s_last_orphan = 0; | |
2199 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2200 | return; | |
2201 | } | |
2202 | ||
2203 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2204 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2205 | sb->s_flags &= ~MS_RDONLY; |
2206 | } | |
2207 | #ifdef CONFIG_QUOTA | |
2208 | /* Needed for iput() to work correctly and not trash data */ | |
2209 | sb->s_flags |= MS_ACTIVE; | |
2210 | /* Turn on quotas so that they are updated correctly */ | |
2211 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2212 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2213 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2214 | if (ret < 0) |
b31e1552 ES |
2215 | ext4_msg(sb, KERN_ERR, |
2216 | "Cannot turn on journaled " | |
2217 | "quota: error %d", ret); | |
ac27a0ec DK |
2218 | } |
2219 | } | |
2220 | #endif | |
2221 | ||
2222 | while (es->s_last_orphan) { | |
2223 | struct inode *inode; | |
2224 | ||
97bd42b9 JB |
2225 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2226 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2227 | es->s_last_orphan = 0; |
2228 | break; | |
2229 | } | |
2230 | ||
617ba13b | 2231 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2232 | dquot_initialize(inode); |
ac27a0ec | 2233 | if (inode->i_nlink) { |
b31e1552 ES |
2234 | ext4_msg(sb, KERN_DEBUG, |
2235 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2236 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2237 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2238 | inode->i_ino, inode->i_size); |
617ba13b | 2239 | ext4_truncate(inode); |
ac27a0ec DK |
2240 | nr_truncates++; |
2241 | } else { | |
b31e1552 ES |
2242 | ext4_msg(sb, KERN_DEBUG, |
2243 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2244 | __func__, inode->i_ino); |
ac27a0ec DK |
2245 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2246 | inode->i_ino); | |
2247 | nr_orphans++; | |
2248 | } | |
2249 | iput(inode); /* The delete magic happens here! */ | |
2250 | } | |
2251 | ||
2b2d6d01 | 2252 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2253 | |
2254 | if (nr_orphans) | |
b31e1552 ES |
2255 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2256 | PLURAL(nr_orphans)); | |
ac27a0ec | 2257 | if (nr_truncates) |
b31e1552 ES |
2258 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2259 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2260 | #ifdef CONFIG_QUOTA |
2261 | /* Turn quotas off */ | |
2262 | for (i = 0; i < MAXQUOTAS; i++) { | |
2263 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2264 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2265 | } |
2266 | #endif | |
2267 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2268 | } | |
0b8e58a1 | 2269 | |
cd2291a4 ES |
2270 | /* |
2271 | * Maximal extent format file size. | |
2272 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2273 | * extent format containers, within a sector_t, and within i_blocks | |
2274 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2275 | * so that won't be a limiting factor. | |
2276 | * | |
f17722f9 LC |
2277 | * However there is other limiting factor. We do store extents in the form |
2278 | * of starting block and length, hence the resulting length of the extent | |
2279 | * covering maximum file size must fit into on-disk format containers as | |
2280 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2281 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2282 | * | |
cd2291a4 ES |
2283 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2284 | */ | |
f287a1a5 | 2285 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2286 | { |
2287 | loff_t res; | |
2288 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2289 | ||
2290 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2291 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2292 | /* |
90c699a9 | 2293 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2294 | * i_block represent total blocks in 512 bytes |
2295 | * 32 == size of vfs inode i_blocks * 8 | |
2296 | */ | |
2297 | upper_limit = (1LL << 32) - 1; | |
2298 | ||
2299 | /* total blocks in file system block size */ | |
2300 | upper_limit >>= (blkbits - 9); | |
2301 | upper_limit <<= blkbits; | |
2302 | } | |
2303 | ||
f17722f9 LC |
2304 | /* |
2305 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2306 | * by one fs block, so ee_len can cover the extent of maximum file | |
2307 | * size | |
2308 | */ | |
2309 | res = (1LL << 32) - 1; | |
cd2291a4 | 2310 | res <<= blkbits; |
cd2291a4 ES |
2311 | |
2312 | /* Sanity check against vm- & vfs- imposed limits */ | |
2313 | if (res > upper_limit) | |
2314 | res = upper_limit; | |
2315 | ||
2316 | return res; | |
2317 | } | |
ac27a0ec | 2318 | |
ac27a0ec | 2319 | /* |
cd2291a4 | 2320 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2321 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2322 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2323 | */ |
f287a1a5 | 2324 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2325 | { |
617ba13b | 2326 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2327 | int meta_blocks; |
2328 | loff_t upper_limit; | |
0b8e58a1 AD |
2329 | /* This is calculated to be the largest file size for a dense, block |
2330 | * mapped file such that the file's total number of 512-byte sectors, | |
2331 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2332 | * | |
2333 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2334 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2335 | */ |
2336 | ||
f287a1a5 | 2337 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2338 | /* |
90c699a9 | 2339 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2340 | * the inode i_block field represents total file blocks in |
2341 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2342 | */ |
2343 | upper_limit = (1LL << 32) - 1; | |
2344 | ||
2345 | /* total blocks in file system block size */ | |
2346 | upper_limit >>= (bits - 9); | |
2347 | ||
2348 | } else { | |
8180a562 AK |
2349 | /* |
2350 | * We use 48 bit ext4_inode i_blocks | |
2351 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2352 | * represent total number of blocks in | |
2353 | * file system block size | |
2354 | */ | |
0fc1b451 AK |
2355 | upper_limit = (1LL << 48) - 1; |
2356 | ||
0fc1b451 AK |
2357 | } |
2358 | ||
2359 | /* indirect blocks */ | |
2360 | meta_blocks = 1; | |
2361 | /* double indirect blocks */ | |
2362 | meta_blocks += 1 + (1LL << (bits-2)); | |
2363 | /* tripple indirect blocks */ | |
2364 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2365 | ||
2366 | upper_limit -= meta_blocks; | |
2367 | upper_limit <<= bits; | |
ac27a0ec DK |
2368 | |
2369 | res += 1LL << (bits-2); | |
2370 | res += 1LL << (2*(bits-2)); | |
2371 | res += 1LL << (3*(bits-2)); | |
2372 | res <<= bits; | |
2373 | if (res > upper_limit) | |
2374 | res = upper_limit; | |
0fc1b451 AK |
2375 | |
2376 | if (res > MAX_LFS_FILESIZE) | |
2377 | res = MAX_LFS_FILESIZE; | |
2378 | ||
ac27a0ec DK |
2379 | return res; |
2380 | } | |
2381 | ||
617ba13b | 2382 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2383 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2384 | { |
617ba13b | 2385 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2386 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2387 | int has_super = 0; |
2388 | ||
2389 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2390 | ||
617ba13b | 2391 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2392 | nr < first_meta_bg) |
70bbb3e0 | 2393 | return logical_sb_block + nr + 1; |
ac27a0ec | 2394 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2395 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2396 | has_super = 1; |
0b8e58a1 | 2397 | |
617ba13b | 2398 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2399 | } |
2400 | ||
c9de560d AT |
2401 | /** |
2402 | * ext4_get_stripe_size: Get the stripe size. | |
2403 | * @sbi: In memory super block info | |
2404 | * | |
2405 | * If we have specified it via mount option, then | |
2406 | * use the mount option value. If the value specified at mount time is | |
2407 | * greater than the blocks per group use the super block value. | |
2408 | * If the super block value is greater than blocks per group return 0. | |
2409 | * Allocator needs it be less than blocks per group. | |
2410 | * | |
2411 | */ | |
2412 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2413 | { | |
2414 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2415 | unsigned long stripe_width = | |
2416 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2417 | int ret; |
c9de560d AT |
2418 | |
2419 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2420 | ret = sbi->s_stripe; |
2421 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2422 | ret = stripe_width; | |
2423 | else if (stride <= sbi->s_blocks_per_group) | |
2424 | ret = stride; | |
2425 | else | |
2426 | ret = 0; | |
c9de560d | 2427 | |
3eb08658 DE |
2428 | /* |
2429 | * If the stripe width is 1, this makes no sense and | |
2430 | * we set it to 0 to turn off stripe handling code. | |
2431 | */ | |
2432 | if (ret <= 1) | |
2433 | ret = 0; | |
c9de560d | 2434 | |
3eb08658 | 2435 | return ret; |
c9de560d | 2436 | } |
ac27a0ec | 2437 | |
3197ebdb TT |
2438 | /* sysfs supprt */ |
2439 | ||
2440 | struct ext4_attr { | |
2441 | struct attribute attr; | |
2442 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2443 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2444 | const char *, size_t); |
2445 | int offset; | |
2446 | }; | |
2447 | ||
2448 | static int parse_strtoul(const char *buf, | |
2449 | unsigned long max, unsigned long *value) | |
2450 | { | |
2451 | char *endp; | |
2452 | ||
e7d2860b AGR |
2453 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2454 | endp = skip_spaces(endp); | |
3197ebdb TT |
2455 | if (*endp || *value > max) |
2456 | return -EINVAL; | |
2457 | ||
2458 | return 0; | |
2459 | } | |
2460 | ||
2461 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2462 | struct ext4_sb_info *sbi, | |
2463 | char *buf) | |
2464 | { | |
2465 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2466 | (s64) EXT4_C2B(sbi, |
2467 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2468 | } |
2469 | ||
2470 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2471 | struct ext4_sb_info *sbi, char *buf) | |
2472 | { | |
2473 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2474 | ||
f613dfcb TT |
2475 | if (!sb->s_bdev->bd_part) |
2476 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2477 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2478 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2479 | sbi->s_sectors_written_start) >> 1); | |
2480 | } | |
2481 | ||
2482 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2483 | struct ext4_sb_info *sbi, char *buf) | |
2484 | { | |
2485 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2486 | ||
f613dfcb TT |
2487 | if (!sb->s_bdev->bd_part) |
2488 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2489 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2490 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2491 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2492 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2493 | } |
2494 | ||
77f4135f VH |
2495 | static ssize_t extent_cache_hits_show(struct ext4_attr *a, |
2496 | struct ext4_sb_info *sbi, char *buf) | |
2497 | { | |
2498 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); | |
2499 | } | |
2500 | ||
2501 | static ssize_t extent_cache_misses_show(struct ext4_attr *a, | |
2502 | struct ext4_sb_info *sbi, char *buf) | |
2503 | { | |
2504 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); | |
2505 | } | |
2506 | ||
3197ebdb TT |
2507 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
2508 | struct ext4_sb_info *sbi, | |
2509 | const char *buf, size_t count) | |
2510 | { | |
2511 | unsigned long t; | |
2512 | ||
2513 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2514 | return -EINVAL; | |
2515 | ||
5dbd571d | 2516 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2517 | return -EINVAL; |
2518 | ||
2519 | sbi->s_inode_readahead_blks = t; | |
2520 | return count; | |
2521 | } | |
2522 | ||
2523 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2524 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2525 | { |
2526 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2527 | ||
2528 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2529 | } | |
2530 | ||
2531 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2532 | struct ext4_sb_info *sbi, | |
2533 | const char *buf, size_t count) | |
2534 | { | |
2535 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2536 | unsigned long t; | |
2537 | ||
2538 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2539 | return -EINVAL; | |
2540 | *ui = t; | |
2541 | return count; | |
2542 | } | |
2543 | ||
2544 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2545 | static struct ext4_attr ext4_attr_##_name = { \ | |
2546 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2547 | .show = _show, \ | |
2548 | .store = _store, \ | |
2549 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2550 | } | |
2551 | #define EXT4_ATTR(name, mode, show, store) \ | |
2552 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2553 | ||
857ac889 | 2554 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2555 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2556 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2557 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2558 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2559 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2560 | ||
2561 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2562 | EXT4_RO_ATTR(session_write_kbytes); | |
2563 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
77f4135f VH |
2564 | EXT4_RO_ATTR(extent_cache_hits); |
2565 | EXT4_RO_ATTR(extent_cache_misses); | |
3197ebdb TT |
2566 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2567 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2568 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2569 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2570 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2571 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2572 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2573 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2574 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2575 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2576 | |
2577 | static struct attribute *ext4_attrs[] = { | |
2578 | ATTR_LIST(delayed_allocation_blocks), | |
2579 | ATTR_LIST(session_write_kbytes), | |
2580 | ATTR_LIST(lifetime_write_kbytes), | |
77f4135f VH |
2581 | ATTR_LIST(extent_cache_hits), |
2582 | ATTR_LIST(extent_cache_misses), | |
3197ebdb | 2583 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2584 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2585 | ATTR_LIST(mb_stats), |
2586 | ATTR_LIST(mb_max_to_scan), | |
2587 | ATTR_LIST(mb_min_to_scan), | |
2588 | ATTR_LIST(mb_order2_req), | |
2589 | ATTR_LIST(mb_stream_req), | |
2590 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2591 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2592 | NULL, |
2593 | }; | |
2594 | ||
857ac889 LC |
2595 | /* Features this copy of ext4 supports */ |
2596 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2597 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2598 | |
2599 | static struct attribute *ext4_feat_attrs[] = { | |
2600 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2601 | ATTR_LIST(batched_discard), |
857ac889 LC |
2602 | NULL, |
2603 | }; | |
2604 | ||
3197ebdb TT |
2605 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2606 | struct attribute *attr, char *buf) | |
2607 | { | |
2608 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2609 | s_kobj); | |
2610 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2611 | ||
2612 | return a->show ? a->show(a, sbi, buf) : 0; | |
2613 | } | |
2614 | ||
2615 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2616 | struct attribute *attr, | |
2617 | const char *buf, size_t len) | |
2618 | { | |
2619 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2620 | s_kobj); | |
2621 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2622 | ||
2623 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2624 | } | |
2625 | ||
2626 | static void ext4_sb_release(struct kobject *kobj) | |
2627 | { | |
2628 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2629 | s_kobj); | |
2630 | complete(&sbi->s_kobj_unregister); | |
2631 | } | |
2632 | ||
52cf25d0 | 2633 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2634 | .show = ext4_attr_show, |
2635 | .store = ext4_attr_store, | |
2636 | }; | |
2637 | ||
2638 | static struct kobj_type ext4_ktype = { | |
2639 | .default_attrs = ext4_attrs, | |
2640 | .sysfs_ops = &ext4_attr_ops, | |
2641 | .release = ext4_sb_release, | |
2642 | }; | |
2643 | ||
857ac889 LC |
2644 | static void ext4_feat_release(struct kobject *kobj) |
2645 | { | |
2646 | complete(&ext4_feat->f_kobj_unregister); | |
2647 | } | |
2648 | ||
2649 | static struct kobj_type ext4_feat_ktype = { | |
2650 | .default_attrs = ext4_feat_attrs, | |
2651 | .sysfs_ops = &ext4_attr_ops, | |
2652 | .release = ext4_feat_release, | |
2653 | }; | |
2654 | ||
a13fb1a4 ES |
2655 | /* |
2656 | * Check whether this filesystem can be mounted based on | |
2657 | * the features present and the RDONLY/RDWR mount requested. | |
2658 | * Returns 1 if this filesystem can be mounted as requested, | |
2659 | * 0 if it cannot be. | |
2660 | */ | |
2661 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2662 | { | |
2663 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2664 | ext4_msg(sb, KERN_ERR, | |
2665 | "Couldn't mount because of " | |
2666 | "unsupported optional features (%x)", | |
2667 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2668 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2669 | return 0; | |
2670 | } | |
2671 | ||
2672 | if (readonly) | |
2673 | return 1; | |
2674 | ||
2675 | /* Check that feature set is OK for a read-write mount */ | |
2676 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2677 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2678 | "unsupported optional features (%x)", | |
2679 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2680 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2681 | return 0; | |
2682 | } | |
2683 | /* | |
2684 | * Large file size enabled file system can only be mounted | |
2685 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2686 | */ | |
2687 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2688 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2689 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2690 | "cannot be mounted RDWR without " | |
2691 | "CONFIG_LBDAF"); | |
2692 | return 0; | |
2693 | } | |
2694 | } | |
bab08ab9 TT |
2695 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2696 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2697 | ext4_msg(sb, KERN_ERR, | |
2698 | "Can't support bigalloc feature without " | |
2699 | "extents feature\n"); | |
2700 | return 0; | |
2701 | } | |
a13fb1a4 ES |
2702 | return 1; |
2703 | } | |
2704 | ||
66e61a9e TT |
2705 | /* |
2706 | * This function is called once a day if we have errors logged | |
2707 | * on the file system | |
2708 | */ | |
2709 | static void print_daily_error_info(unsigned long arg) | |
2710 | { | |
2711 | struct super_block *sb = (struct super_block *) arg; | |
2712 | struct ext4_sb_info *sbi; | |
2713 | struct ext4_super_block *es; | |
2714 | ||
2715 | sbi = EXT4_SB(sb); | |
2716 | es = sbi->s_es; | |
2717 | ||
2718 | if (es->s_error_count) | |
2719 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2720 | le32_to_cpu(es->s_error_count)); | |
2721 | if (es->s_first_error_time) { | |
2722 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2723 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2724 | (int) sizeof(es->s_first_error_func), | |
2725 | es->s_first_error_func, | |
2726 | le32_to_cpu(es->s_first_error_line)); | |
2727 | if (es->s_first_error_ino) | |
2728 | printk(": inode %u", | |
2729 | le32_to_cpu(es->s_first_error_ino)); | |
2730 | if (es->s_first_error_block) | |
2731 | printk(": block %llu", (unsigned long long) | |
2732 | le64_to_cpu(es->s_first_error_block)); | |
2733 | printk("\n"); | |
2734 | } | |
2735 | if (es->s_last_error_time) { | |
2736 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2737 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2738 | (int) sizeof(es->s_last_error_func), | |
2739 | es->s_last_error_func, | |
2740 | le32_to_cpu(es->s_last_error_line)); | |
2741 | if (es->s_last_error_ino) | |
2742 | printk(": inode %u", | |
2743 | le32_to_cpu(es->s_last_error_ino)); | |
2744 | if (es->s_last_error_block) | |
2745 | printk(": block %llu", (unsigned long long) | |
2746 | le64_to_cpu(es->s_last_error_block)); | |
2747 | printk("\n"); | |
2748 | } | |
2749 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2750 | } | |
2751 | ||
bfff6873 LC |
2752 | /* Find next suitable group and run ext4_init_inode_table */ |
2753 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2754 | { | |
2755 | struct ext4_group_desc *gdp = NULL; | |
2756 | ext4_group_t group, ngroups; | |
2757 | struct super_block *sb; | |
2758 | unsigned long timeout = 0; | |
2759 | int ret = 0; | |
2760 | ||
2761 | sb = elr->lr_super; | |
2762 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2763 | ||
2764 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2765 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2766 | if (!gdp) { | |
2767 | ret = 1; | |
2768 | break; | |
2769 | } | |
2770 | ||
2771 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2772 | break; | |
2773 | } | |
2774 | ||
2775 | if (group == ngroups) | |
2776 | ret = 1; | |
2777 | ||
2778 | if (!ret) { | |
2779 | timeout = jiffies; | |
2780 | ret = ext4_init_inode_table(sb, group, | |
2781 | elr->lr_timeout ? 0 : 1); | |
2782 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2783 | timeout = (jiffies - timeout) * |
2784 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2785 | elr->lr_timeout = timeout; |
2786 | } | |
2787 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2788 | elr->lr_next_group = group + 1; | |
2789 | } | |
2790 | ||
2791 | return ret; | |
2792 | } | |
2793 | ||
2794 | /* | |
2795 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2796 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2797 | */ |
2798 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2799 | { | |
2800 | struct ext4_sb_info *sbi; | |
2801 | ||
2802 | if (!elr) | |
2803 | return; | |
2804 | ||
2805 | sbi = elr->lr_sbi; | |
2806 | ||
2807 | list_del(&elr->lr_request); | |
2808 | sbi->s_li_request = NULL; | |
2809 | kfree(elr); | |
2810 | } | |
2811 | ||
2812 | static void ext4_unregister_li_request(struct super_block *sb) | |
2813 | { | |
1bb933fb LC |
2814 | mutex_lock(&ext4_li_mtx); |
2815 | if (!ext4_li_info) { | |
2816 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2817 | return; |
1bb933fb | 2818 | } |
bfff6873 LC |
2819 | |
2820 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2821 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2822 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2823 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2824 | } |
2825 | ||
8f1f7453 ES |
2826 | static struct task_struct *ext4_lazyinit_task; |
2827 | ||
bfff6873 LC |
2828 | /* |
2829 | * This is the function where ext4lazyinit thread lives. It walks | |
2830 | * through the request list searching for next scheduled filesystem. | |
2831 | * When such a fs is found, run the lazy initialization request | |
2832 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2833 | * function. Based on that time we compute next schedule time of | |
2834 | * the request. When walking through the list is complete, compute | |
2835 | * next waking time and put itself into sleep. | |
2836 | */ | |
2837 | static int ext4_lazyinit_thread(void *arg) | |
2838 | { | |
2839 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2840 | struct list_head *pos, *n; | |
2841 | struct ext4_li_request *elr; | |
4ed5c033 | 2842 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2843 | |
2844 | BUG_ON(NULL == eli); | |
2845 | ||
bfff6873 LC |
2846 | cont_thread: |
2847 | while (true) { | |
2848 | next_wakeup = MAX_JIFFY_OFFSET; | |
2849 | ||
2850 | mutex_lock(&eli->li_list_mtx); | |
2851 | if (list_empty(&eli->li_request_list)) { | |
2852 | mutex_unlock(&eli->li_list_mtx); | |
2853 | goto exit_thread; | |
2854 | } | |
2855 | ||
2856 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2857 | elr = list_entry(pos, struct ext4_li_request, | |
2858 | lr_request); | |
2859 | ||
b2c78cd0 TT |
2860 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2861 | if (ext4_run_li_request(elr) != 0) { | |
2862 | /* error, remove the lazy_init job */ | |
2863 | ext4_remove_li_request(elr); | |
2864 | continue; | |
2865 | } | |
bfff6873 LC |
2866 | } |
2867 | ||
2868 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2869 | next_wakeup = elr->lr_next_sched; | |
2870 | } | |
2871 | mutex_unlock(&eli->li_list_mtx); | |
2872 | ||
a0acae0e | 2873 | try_to_freeze(); |
bfff6873 | 2874 | |
4ed5c033 LC |
2875 | cur = jiffies; |
2876 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2877 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2878 | cond_resched(); |
2879 | continue; | |
2880 | } | |
2881 | ||
4ed5c033 LC |
2882 | schedule_timeout_interruptible(next_wakeup - cur); |
2883 | ||
8f1f7453 ES |
2884 | if (kthread_should_stop()) { |
2885 | ext4_clear_request_list(); | |
2886 | goto exit_thread; | |
2887 | } | |
bfff6873 LC |
2888 | } |
2889 | ||
2890 | exit_thread: | |
2891 | /* | |
2892 | * It looks like the request list is empty, but we need | |
2893 | * to check it under the li_list_mtx lock, to prevent any | |
2894 | * additions into it, and of course we should lock ext4_li_mtx | |
2895 | * to atomically free the list and ext4_li_info, because at | |
2896 | * this point another ext4 filesystem could be registering | |
2897 | * new one. | |
2898 | */ | |
2899 | mutex_lock(&ext4_li_mtx); | |
2900 | mutex_lock(&eli->li_list_mtx); | |
2901 | if (!list_empty(&eli->li_request_list)) { | |
2902 | mutex_unlock(&eli->li_list_mtx); | |
2903 | mutex_unlock(&ext4_li_mtx); | |
2904 | goto cont_thread; | |
2905 | } | |
2906 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2907 | kfree(ext4_li_info); |
2908 | ext4_li_info = NULL; | |
2909 | mutex_unlock(&ext4_li_mtx); | |
2910 | ||
2911 | return 0; | |
2912 | } | |
2913 | ||
2914 | static void ext4_clear_request_list(void) | |
2915 | { | |
2916 | struct list_head *pos, *n; | |
2917 | struct ext4_li_request *elr; | |
2918 | ||
2919 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2920 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2921 | elr = list_entry(pos, struct ext4_li_request, | |
2922 | lr_request); | |
2923 | ext4_remove_li_request(elr); | |
2924 | } | |
2925 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2926 | } | |
2927 | ||
2928 | static int ext4_run_lazyinit_thread(void) | |
2929 | { | |
8f1f7453 ES |
2930 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2931 | ext4_li_info, "ext4lazyinit"); | |
2932 | if (IS_ERR(ext4_lazyinit_task)) { | |
2933 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2934 | ext4_clear_request_list(); |
bfff6873 LC |
2935 | kfree(ext4_li_info); |
2936 | ext4_li_info = NULL; | |
2937 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2938 | "initialization thread\n", | |
2939 | err); | |
2940 | return err; | |
2941 | } | |
2942 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2943 | return 0; |
2944 | } | |
2945 | ||
2946 | /* | |
2947 | * Check whether it make sense to run itable init. thread or not. | |
2948 | * If there is at least one uninitialized inode table, return | |
2949 | * corresponding group number, else the loop goes through all | |
2950 | * groups and return total number of groups. | |
2951 | */ | |
2952 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2953 | { | |
2954 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2955 | struct ext4_group_desc *gdp = NULL; | |
2956 | ||
2957 | for (group = 0; group < ngroups; group++) { | |
2958 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2959 | if (!gdp) | |
2960 | continue; | |
2961 | ||
2962 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2963 | break; | |
2964 | } | |
2965 | ||
2966 | return group; | |
2967 | } | |
2968 | ||
2969 | static int ext4_li_info_new(void) | |
2970 | { | |
2971 | struct ext4_lazy_init *eli = NULL; | |
2972 | ||
2973 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2974 | if (!eli) | |
2975 | return -ENOMEM; | |
2976 | ||
bfff6873 LC |
2977 | INIT_LIST_HEAD(&eli->li_request_list); |
2978 | mutex_init(&eli->li_list_mtx); | |
2979 | ||
bfff6873 LC |
2980 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2981 | ||
2982 | ext4_li_info = eli; | |
2983 | ||
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2988 | ext4_group_t start) | |
2989 | { | |
2990 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2991 | struct ext4_li_request *elr; | |
2992 | unsigned long rnd; | |
2993 | ||
2994 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2995 | if (!elr) | |
2996 | return NULL; | |
2997 | ||
2998 | elr->lr_super = sb; | |
2999 | elr->lr_sbi = sbi; | |
3000 | elr->lr_next_group = start; | |
3001 | ||
3002 | /* | |
3003 | * Randomize first schedule time of the request to | |
3004 | * spread the inode table initialization requests | |
3005 | * better. | |
3006 | */ | |
3007 | get_random_bytes(&rnd, sizeof(rnd)); | |
3008 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
3009 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
3010 | ||
3011 | return elr; | |
3012 | } | |
3013 | ||
3014 | static int ext4_register_li_request(struct super_block *sb, | |
3015 | ext4_group_t first_not_zeroed) | |
3016 | { | |
3017 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3018 | struct ext4_li_request *elr; | |
3019 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 3020 | int ret = 0; |
bfff6873 | 3021 | |
51ce6511 LC |
3022 | if (sbi->s_li_request != NULL) { |
3023 | /* | |
3024 | * Reset timeout so it can be computed again, because | |
3025 | * s_li_wait_mult might have changed. | |
3026 | */ | |
3027 | sbi->s_li_request->lr_timeout = 0; | |
beed5ecb | 3028 | return 0; |
51ce6511 | 3029 | } |
bfff6873 LC |
3030 | |
3031 | if (first_not_zeroed == ngroups || | |
3032 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3033 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 3034 | return 0; |
bfff6873 LC |
3035 | |
3036 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
3037 | if (!elr) |
3038 | return -ENOMEM; | |
bfff6873 LC |
3039 | |
3040 | mutex_lock(&ext4_li_mtx); | |
3041 | ||
3042 | if (NULL == ext4_li_info) { | |
3043 | ret = ext4_li_info_new(); | |
3044 | if (ret) | |
3045 | goto out; | |
3046 | } | |
3047 | ||
3048 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3049 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3050 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3051 | ||
3052 | sbi->s_li_request = elr; | |
46e4690b TM |
3053 | /* |
3054 | * set elr to NULL here since it has been inserted to | |
3055 | * the request_list and the removal and free of it is | |
3056 | * handled by ext4_clear_request_list from now on. | |
3057 | */ | |
3058 | elr = NULL; | |
bfff6873 LC |
3059 | |
3060 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3061 | ret = ext4_run_lazyinit_thread(); | |
3062 | if (ret) | |
3063 | goto out; | |
3064 | } | |
bfff6873 | 3065 | out: |
beed5ecb NK |
3066 | mutex_unlock(&ext4_li_mtx); |
3067 | if (ret) | |
bfff6873 | 3068 | kfree(elr); |
bfff6873 LC |
3069 | return ret; |
3070 | } | |
3071 | ||
3072 | /* | |
3073 | * We do not need to lock anything since this is called on | |
3074 | * module unload. | |
3075 | */ | |
3076 | static void ext4_destroy_lazyinit_thread(void) | |
3077 | { | |
3078 | /* | |
3079 | * If thread exited earlier | |
3080 | * there's nothing to be done. | |
3081 | */ | |
8f1f7453 | 3082 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3083 | return; |
3084 | ||
8f1f7453 | 3085 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3086 | } |
3087 | ||
2b2d6d01 | 3088 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3089 | { |
d4c402d9 | 3090 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3091 | struct buffer_head *bh; |
617ba13b MC |
3092 | struct ext4_super_block *es = NULL; |
3093 | struct ext4_sb_info *sbi; | |
3094 | ext4_fsblk_t block; | |
3095 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3096 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3097 | unsigned long offset = 0; |
ac27a0ec DK |
3098 | unsigned long journal_devnum = 0; |
3099 | unsigned long def_mount_opts; | |
3100 | struct inode *root; | |
9f6200bb | 3101 | char *cp; |
0390131b | 3102 | const char *descr; |
dcc7dae3 | 3103 | int ret = -ENOMEM; |
281b5995 | 3104 | int blocksize, clustersize; |
4ec11028 TT |
3105 | unsigned int db_count; |
3106 | unsigned int i; | |
281b5995 | 3107 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3108 | __u64 blocks_count; |
833f4077 | 3109 | int err; |
b3881f74 | 3110 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3111 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3112 | |
3113 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3114 | if (!sbi) | |
dcc7dae3 | 3115 | goto out_free_orig; |
705895b6 PE |
3116 | |
3117 | sbi->s_blockgroup_lock = | |
3118 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3119 | if (!sbi->s_blockgroup_lock) { | |
3120 | kfree(sbi); | |
dcc7dae3 | 3121 | goto out_free_orig; |
705895b6 | 3122 | } |
ac27a0ec DK |
3123 | sb->s_fs_info = sbi; |
3124 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3125 | sbi->s_resuid = EXT4_DEF_RESUID; |
3126 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3127 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3128 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3129 | if (sb->s_bdev->bd_part) |
3130 | sbi->s_sectors_written_start = | |
3131 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3132 | |
9f6200bb TT |
3133 | /* Cleanup superblock name */ |
3134 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3135 | *cp = '!'; | |
3136 | ||
dcc7dae3 | 3137 | ret = -EINVAL; |
617ba13b | 3138 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3139 | if (!blocksize) { |
b31e1552 | 3140 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3141 | goto out_fail; |
3142 | } | |
3143 | ||
3144 | /* | |
617ba13b | 3145 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3146 | * block sizes. We need to calculate the offset from buffer start. |
3147 | */ | |
617ba13b | 3148 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3149 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3150 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3151 | } else { |
70bbb3e0 | 3152 | logical_sb_block = sb_block; |
ac27a0ec DK |
3153 | } |
3154 | ||
70bbb3e0 | 3155 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3156 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3157 | goto out_fail; |
3158 | } | |
3159 | /* | |
3160 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3161 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3162 | */ |
617ba13b | 3163 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3164 | sbi->s_es = es; |
3165 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3166 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3167 | goto cantfind_ext4; | |
afc32f7e | 3168 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3169 | |
3170 | /* Set defaults before we parse the mount options */ | |
3171 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3172 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3173 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3174 | set_opt(sb, DEBUG); |
437ca0fd DM |
3175 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3176 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3177 | "2.6.38"); | |
fd8c37ec | 3178 | set_opt(sb, GRPID); |
437ca0fd | 3179 | } |
617ba13b | 3180 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3181 | set_opt(sb, NO_UID32); |
ea663336 | 3182 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3183 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3184 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3185 | #endif |
03010a33 | 3186 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3187 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3188 | #endif |
6fd7a467 | 3189 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3190 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3191 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3192 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3193 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3194 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3195 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3196 | |
3197 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3198 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3199 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3200 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3201 | else |
fd8c37ec | 3202 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3203 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3204 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3205 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3206 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3207 | |
3208 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3209 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3210 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3211 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3212 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3213 | |
8b67f04a | 3214 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3215 | set_opt(sb, BARRIER); |
ac27a0ec | 3216 | |
dd919b98 AK |
3217 | /* |
3218 | * enable delayed allocation by default | |
3219 | * Use -o nodelalloc to turn it off | |
3220 | */ | |
8b67f04a TT |
3221 | if (!IS_EXT3_SB(sb) && |
3222 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3223 | set_opt(sb, DELALLOC); |
dd919b98 | 3224 | |
51ce6511 LC |
3225 | /* |
3226 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3227 | * no mount option specified. | |
3228 | */ | |
3229 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3230 | ||
8b67f04a | 3231 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3232 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3233 | ext4_msg(sb, KERN_WARNING, |
3234 | "failed to parse options in superblock: %s", | |
3235 | sbi->s_es->s_mount_opts); | |
3236 | } | |
b3881f74 | 3237 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3238 | &journal_ioprio, 0)) |
ac27a0ec DK |
3239 | goto failed_mount; |
3240 | ||
56889787 TT |
3241 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3242 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3243 | "with data=journal disables delayed " | |
3244 | "allocation and O_DIRECT support!\n"); | |
3245 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3246 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3247 | "both data=journal and delalloc"); | |
3248 | goto failed_mount; | |
3249 | } | |
3250 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3251 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3252 | "both data=journal and delalloc"); | |
3253 | goto failed_mount; | |
3254 | } | |
3255 | if (test_opt(sb, DELALLOC)) | |
3256 | clear_opt(sb, DELALLOC); | |
3257 | } | |
3258 | ||
3259 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
3260 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3261 | if (blocksize < PAGE_SIZE) { | |
3262 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3263 | "dioread_nolock if block size != PAGE_SIZE"); | |
3264 | goto failed_mount; | |
3265 | } | |
3266 | } | |
3267 | ||
ac27a0ec | 3268 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3269 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3270 | |
617ba13b MC |
3271 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3272 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3273 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3274 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3275 | ext4_msg(sb, KERN_WARNING, |
3276 | "feature flags set on rev 0 fs, " | |
3277 | "running e2fsck is recommended"); | |
469108ff | 3278 | |
2035e776 TT |
3279 | if (IS_EXT2_SB(sb)) { |
3280 | if (ext2_feature_set_ok(sb)) | |
3281 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3282 | "using the ext4 subsystem"); | |
3283 | else { | |
3284 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3285 | "to feature incompatibilities"); | |
3286 | goto failed_mount; | |
3287 | } | |
3288 | } | |
3289 | ||
3290 | if (IS_EXT3_SB(sb)) { | |
3291 | if (ext3_feature_set_ok(sb)) | |
3292 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3293 | "using the ext4 subsystem"); | |
3294 | else { | |
3295 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3296 | "to feature incompatibilities"); | |
3297 | goto failed_mount; | |
3298 | } | |
3299 | } | |
3300 | ||
ac27a0ec DK |
3301 | /* |
3302 | * Check feature flags regardless of the revision level, since we | |
3303 | * previously didn't change the revision level when setting the flags, | |
3304 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3305 | */ | |
a13fb1a4 | 3306 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3307 | goto failed_mount; |
a13fb1a4 | 3308 | |
617ba13b MC |
3309 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3310 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3311 | ext4_msg(sb, KERN_ERR, |
3312 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3313 | goto failed_mount; |
3314 | } | |
3315 | ||
ac27a0ec | 3316 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3317 | /* Validate the filesystem blocksize */ |
3318 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3319 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3320 | blocksize); |
ac27a0ec DK |
3321 | goto failed_mount; |
3322 | } | |
3323 | ||
2b2d6d01 | 3324 | brelse(bh); |
70bbb3e0 AM |
3325 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3326 | offset = do_div(logical_sb_block, blocksize); | |
3327 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3328 | if (!bh) { |
b31e1552 ES |
3329 | ext4_msg(sb, KERN_ERR, |
3330 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3331 | goto failed_mount; |
3332 | } | |
617ba13b | 3333 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3334 | sbi->s_es = es; |
617ba13b | 3335 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3336 | ext4_msg(sb, KERN_ERR, |
3337 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3338 | goto failed_mount; |
3339 | } | |
3340 | } | |
3341 | ||
a13fb1a4 ES |
3342 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3343 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3344 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3345 | has_huge_files); | |
3346 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3347 | |
617ba13b MC |
3348 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3349 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3350 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3351 | } else { |
3352 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3353 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3354 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3355 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3356 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3357 | ext4_msg(sb, KERN_ERR, |
3358 | "unsupported inode size: %d", | |
2b2d6d01 | 3359 | sbi->s_inode_size); |
ac27a0ec DK |
3360 | goto failed_mount; |
3361 | } | |
ef7f3835 KS |
3362 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3363 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3364 | } |
0b8e58a1 | 3365 | |
0d1ee42f AR |
3366 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3367 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3368 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3369 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3370 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3371 | ext4_msg(sb, KERN_ERR, |
3372 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3373 | sbi->s_desc_size); |
3374 | goto failed_mount; | |
3375 | } | |
3376 | } else | |
3377 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3378 | |
ac27a0ec | 3379 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3380 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3381 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3382 | goto cantfind_ext4; |
0b8e58a1 | 3383 | |
617ba13b | 3384 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3385 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3386 | goto cantfind_ext4; |
ac27a0ec DK |
3387 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3388 | sbi->s_inodes_per_block; | |
0d1ee42f | 3389 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3390 | sbi->s_sbh = bh; |
3391 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3392 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3393 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3394 | |
2b2d6d01 | 3395 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3396 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3397 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3398 | i = le32_to_cpu(es->s_flags); |
3399 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3400 | sbi->s_hash_unsigned = 3; | |
3401 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3402 | #ifdef __CHAR_UNSIGNED__ | |
3403 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3404 | sbi->s_hash_unsigned = 3; | |
3405 | #else | |
3406 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3407 | #endif | |
3408 | sb->s_dirt = 1; | |
3409 | } | |
ac27a0ec | 3410 | |
281b5995 TT |
3411 | /* Handle clustersize */ |
3412 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3413 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3414 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3415 | if (has_bigalloc) { | |
3416 | if (clustersize < blocksize) { | |
3417 | ext4_msg(sb, KERN_ERR, | |
3418 | "cluster size (%d) smaller than " | |
3419 | "block size (%d)", clustersize, blocksize); | |
3420 | goto failed_mount; | |
3421 | } | |
3422 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3423 | le32_to_cpu(es->s_log_block_size); | |
3424 | sbi->s_clusters_per_group = | |
3425 | le32_to_cpu(es->s_clusters_per_group); | |
3426 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3427 | ext4_msg(sb, KERN_ERR, | |
3428 | "#clusters per group too big: %lu", | |
3429 | sbi->s_clusters_per_group); | |
3430 | goto failed_mount; | |
3431 | } | |
3432 | if (sbi->s_blocks_per_group != | |
3433 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3434 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3435 | "clusters per group (%lu) inconsistent", | |
3436 | sbi->s_blocks_per_group, | |
3437 | sbi->s_clusters_per_group); | |
3438 | goto failed_mount; | |
3439 | } | |
3440 | } else { | |
3441 | if (clustersize != blocksize) { | |
3442 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3443 | "block size (%d)", clustersize, | |
3444 | blocksize); | |
3445 | clustersize = blocksize; | |
3446 | } | |
3447 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3448 | ext4_msg(sb, KERN_ERR, | |
3449 | "#blocks per group too big: %lu", | |
3450 | sbi->s_blocks_per_group); | |
3451 | goto failed_mount; | |
3452 | } | |
3453 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3454 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3455 | } |
281b5995 TT |
3456 | sbi->s_cluster_ratio = clustersize / blocksize; |
3457 | ||
ac27a0ec | 3458 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3459 | ext4_msg(sb, KERN_ERR, |
3460 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3461 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3462 | goto failed_mount; |
3463 | } | |
3464 | ||
bf43d84b ES |
3465 | /* |
3466 | * Test whether we have more sectors than will fit in sector_t, | |
3467 | * and whether the max offset is addressable by the page cache. | |
3468 | */ | |
5a9ae68a | 3469 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3470 | ext4_blocks_count(es)); |
5a9ae68a | 3471 | if (err) { |
b31e1552 | 3472 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3473 | " too large to mount safely on this system"); |
ac27a0ec | 3474 | if (sizeof(sector_t) < 8) |
90c699a9 | 3475 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3476 | ret = err; |
ac27a0ec DK |
3477 | goto failed_mount; |
3478 | } | |
3479 | ||
617ba13b MC |
3480 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3481 | goto cantfind_ext4; | |
e7c95593 | 3482 | |
0f2ddca6 FTN |
3483 | /* check blocks count against device size */ |
3484 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3485 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3486 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3487 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3488 | ext4_blocks_count(es), blocks_count); |
3489 | goto failed_mount; | |
3490 | } | |
3491 | ||
0b8e58a1 AD |
3492 | /* |
3493 | * It makes no sense for the first data block to be beyond the end | |
3494 | * of the filesystem. | |
3495 | */ | |
3496 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3497 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3498 | "block %u is beyond end of filesystem (%llu)", |
3499 | le32_to_cpu(es->s_first_data_block), | |
3500 | ext4_blocks_count(es)); | |
e7c95593 ES |
3501 | goto failed_mount; |
3502 | } | |
bd81d8ee LV |
3503 | blocks_count = (ext4_blocks_count(es) - |
3504 | le32_to_cpu(es->s_first_data_block) + | |
3505 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3506 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3507 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3508 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3509 | "(block count %llu, first data block %u, " |
b31e1552 | 3510 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3511 | ext4_blocks_count(es), |
3512 | le32_to_cpu(es->s_first_data_block), | |
3513 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3514 | goto failed_mount; | |
3515 | } | |
bd81d8ee | 3516 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3517 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3518 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3519 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3520 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3521 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3522 | sizeof(struct buffer_head *), | |
3523 | GFP_KERNEL); | |
ac27a0ec | 3524 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3525 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3526 | goto failed_mount; |
3527 | } | |
3528 | ||
9f6200bb TT |
3529 | if (ext4_proc_root) |
3530 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3531 | |
705895b6 | 3532 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3533 | |
3534 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3535 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3536 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3537 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3538 | ext4_msg(sb, KERN_ERR, |
3539 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3540 | db_count = i; |
3541 | goto failed_mount2; | |
3542 | } | |
3543 | } | |
bfff6873 | 3544 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3545 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3546 | goto failed_mount2; |
3547 | } | |
772cb7c8 JS |
3548 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3549 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3550 | ext4_msg(sb, KERN_ERR, |
3551 | "unable to initialize " | |
3552 | "flex_bg meta info!"); | |
772cb7c8 JS |
3553 | goto failed_mount2; |
3554 | } | |
3555 | ||
ac27a0ec DK |
3556 | sbi->s_gdb_count = db_count; |
3557 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3558 | spin_lock_init(&sbi->s_next_gen_lock); | |
3559 | ||
04496411 TM |
3560 | init_timer(&sbi->s_err_report); |
3561 | sbi->s_err_report.function = print_daily_error_info; | |
3562 | sbi->s_err_report.data = (unsigned long) sb; | |
3563 | ||
57042651 | 3564 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3565 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3566 | if (!err) { |
3567 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3568 | ext4_count_free_inodes(sb)); | |
3569 | } | |
3570 | if (!err) { | |
3571 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3572 | ext4_count_dirs(sb)); | |
3573 | } | |
3574 | if (!err) { | |
57042651 | 3575 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a TT |
3576 | } |
3577 | if (err) { | |
3578 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3579 | goto failed_mount3; | |
3580 | } | |
3581 | ||
c9de560d | 3582 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3583 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3584 | |
ac27a0ec DK |
3585 | /* |
3586 | * set up enough so that it can read an inode | |
3587 | */ | |
9ca92389 TT |
3588 | if (!test_opt(sb, NOLOAD) && |
3589 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3590 | sb->s_op = &ext4_sops; | |
3591 | else | |
3592 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3593 | sb->s_export_op = &ext4_export_ops; |
3594 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3595 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3596 | sb->s_qcop = &ext4_qctl_operations; |
3597 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec | 3598 | #endif |
f2fa2ffc AK |
3599 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3600 | ||
ac27a0ec | 3601 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3602 | mutex_init(&sbi->s_orphan_lock); |
8f82f840 | 3603 | sbi->s_resize_flags = 0; |
ac27a0ec DK |
3604 | |
3605 | sb->s_root = NULL; | |
3606 | ||
3607 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3608 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3609 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3610 | |
c5e06d10 JL |
3611 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3612 | !(sb->s_flags & MS_RDONLY)) | |
3613 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3614 | goto failed_mount3; | |
3615 | ||
ac27a0ec DK |
3616 | /* |
3617 | * The first inode we look at is the journal inode. Don't try | |
3618 | * root first: it may be modified in the journal! | |
3619 | */ | |
3620 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3621 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3622 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3623 | goto failed_mount3; |
0390131b FM |
3624 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3625 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3626 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3627 | "suppressed and not mounted read-only"); | |
744692dc | 3628 | goto failed_mount_wq; |
ac27a0ec | 3629 | } else { |
fd8c37ec | 3630 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3631 | sbi->s_journal = NULL; |
3632 | needs_recovery = 0; | |
3633 | goto no_journal; | |
ac27a0ec DK |
3634 | } |
3635 | ||
eb40a09c JS |
3636 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3637 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3638 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3639 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3640 | goto failed_mount_wq; |
eb40a09c JS |
3641 | } |
3642 | ||
d4da6c9c LT |
3643 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3644 | jbd2_journal_set_features(sbi->s_journal, | |
3645 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3646 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3647 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3648 | jbd2_journal_set_features(sbi->s_journal, | |
3649 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3650 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3651 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3652 | } else { |
3653 | jbd2_journal_clear_features(sbi->s_journal, | |
3654 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3655 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3656 | } | |
818d276c | 3657 | |
ac27a0ec DK |
3658 | /* We have now updated the journal if required, so we can |
3659 | * validate the data journaling mode. */ | |
3660 | switch (test_opt(sb, DATA_FLAGS)) { | |
3661 | case 0: | |
3662 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3663 | * capabilities: ORDERED_DATA if the journal can |
3664 | * cope, else JOURNAL_DATA | |
3665 | */ | |
dab291af MC |
3666 | if (jbd2_journal_check_available_features |
3667 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3668 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3669 | else |
fd8c37ec | 3670 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3671 | break; |
3672 | ||
617ba13b MC |
3673 | case EXT4_MOUNT_ORDERED_DATA: |
3674 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3675 | if (!jbd2_journal_check_available_features |
3676 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3677 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3678 | "requested data journaling mode"); | |
744692dc | 3679 | goto failed_mount_wq; |
ac27a0ec DK |
3680 | } |
3681 | default: | |
3682 | break; | |
3683 | } | |
b3881f74 | 3684 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3685 | |
18aadd47 BJ |
3686 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3687 | ||
ce7e010a TT |
3688 | /* |
3689 | * The journal may have updated the bg summary counts, so we | |
3690 | * need to update the global counters. | |
3691 | */ | |
57042651 | 3692 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3693 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3694 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3695 | ext4_count_free_inodes(sb)); | |
3696 | percpu_counter_set(&sbi->s_dirs_counter, | |
3697 | ext4_count_dirs(sb)); | |
57042651 | 3698 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3699 | |
ce7e010a | 3700 | no_journal: |
fd89d5f2 TH |
3701 | /* |
3702 | * The maximum number of concurrent works can be high and | |
3703 | * concurrency isn't really necessary. Limit it to 1. | |
3704 | */ | |
3705 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3706 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3707 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3708 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3709 | goto failed_mount_wq; | |
3710 | } | |
3711 | ||
ac27a0ec | 3712 | /* |
dab291af | 3713 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3714 | * so we can safely mount the rest of the filesystem now. |
3715 | */ | |
3716 | ||
1d1fe1ee DH |
3717 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3718 | if (IS_ERR(root)) { | |
b31e1552 | 3719 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3720 | ret = PTR_ERR(root); |
32a9bb57 | 3721 | root = NULL; |
ac27a0ec DK |
3722 | goto failed_mount4; |
3723 | } | |
3724 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3725 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3726 | iput(root); |
ac27a0ec DK |
3727 | goto failed_mount4; |
3728 | } | |
1d1fe1ee DH |
3729 | sb->s_root = d_alloc_root(root); |
3730 | if (!sb->s_root) { | |
94bf608a | 3731 | iput(root); |
b31e1552 | 3732 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3733 | ret = -ENOMEM; |
3734 | goto failed_mount4; | |
3735 | } | |
ac27a0ec | 3736 | |
2b2d6d01 | 3737 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3738 | |
3739 | /* determine the minimum size of new large inodes, if present */ | |
3740 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3741 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3742 | EXT4_GOOD_OLD_INODE_SIZE; | |
3743 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3744 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3745 | if (sbi->s_want_extra_isize < | |
3746 | le16_to_cpu(es->s_want_extra_isize)) | |
3747 | sbi->s_want_extra_isize = | |
3748 | le16_to_cpu(es->s_want_extra_isize); | |
3749 | if (sbi->s_want_extra_isize < | |
3750 | le16_to_cpu(es->s_min_extra_isize)) | |
3751 | sbi->s_want_extra_isize = | |
3752 | le16_to_cpu(es->s_min_extra_isize); | |
3753 | } | |
3754 | } | |
3755 | /* Check if enough inode space is available */ | |
3756 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3757 | sbi->s_inode_size) { | |
3758 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3759 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3760 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3761 | "available"); | |
ef7f3835 KS |
3762 | } |
3763 | ||
6fd058f7 TT |
3764 | err = ext4_setup_system_zone(sb); |
3765 | if (err) { | |
b31e1552 | 3766 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3767 | "zone (%d)", err); |
94bf608a | 3768 | goto failed_mount4a; |
6fd058f7 TT |
3769 | } |
3770 | ||
c2774d84 AK |
3771 | ext4_ext_init(sb); |
3772 | err = ext4_mb_init(sb, needs_recovery); | |
3773 | if (err) { | |
421f91d2 | 3774 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3775 | err); |
dcf2d804 | 3776 | goto failed_mount5; |
c2774d84 AK |
3777 | } |
3778 | ||
bfff6873 LC |
3779 | err = ext4_register_li_request(sb, first_not_zeroed); |
3780 | if (err) | |
dcf2d804 | 3781 | goto failed_mount6; |
bfff6873 | 3782 | |
3197ebdb TT |
3783 | sbi->s_kobj.kset = ext4_kset; |
3784 | init_completion(&sbi->s_kobj_unregister); | |
3785 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3786 | "%s", sb->s_id); | |
dcf2d804 TM |
3787 | if (err) |
3788 | goto failed_mount7; | |
3197ebdb | 3789 | |
617ba13b MC |
3790 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3791 | ext4_orphan_cleanup(sb, es); | |
3792 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3793 | if (needs_recovery) { |
b31e1552 | 3794 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3795 | ext4_mark_recovery_complete(sb, es); |
3796 | } | |
3797 | if (EXT4_SB(sb)->s_journal) { | |
3798 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3799 | descr = " journalled data mode"; | |
3800 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3801 | descr = " ordered data mode"; | |
3802 | else | |
3803 | descr = " writeback data mode"; | |
3804 | } else | |
3805 | descr = "out journal"; | |
3806 | ||
d4c402d9 | 3807 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3808 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3809 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3810 | |
66e61a9e TT |
3811 | if (es->s_error_count) |
3812 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3813 | |
d4c402d9 | 3814 | kfree(orig_data); |
ac27a0ec DK |
3815 | return 0; |
3816 | ||
617ba13b | 3817 | cantfind_ext4: |
ac27a0ec | 3818 | if (!silent) |
b31e1552 | 3819 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3820 | goto failed_mount; |
3821 | ||
dcf2d804 TM |
3822 | failed_mount7: |
3823 | ext4_unregister_li_request(sb); | |
3824 | failed_mount6: | |
dcf2d804 | 3825 | ext4_mb_release(sb); |
94bf608a AV |
3826 | failed_mount5: |
3827 | ext4_ext_release(sb); | |
dcf2d804 | 3828 | ext4_release_system_zone(sb); |
94bf608a AV |
3829 | failed_mount4a: |
3830 | dput(sb->s_root); | |
32a9bb57 | 3831 | sb->s_root = NULL; |
94bf608a | 3832 | failed_mount4: |
b31e1552 | 3833 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3834 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3835 | failed_mount_wq: | |
0390131b FM |
3836 | if (sbi->s_journal) { |
3837 | jbd2_journal_destroy(sbi->s_journal); | |
3838 | sbi->s_journal = NULL; | |
3839 | } | |
ac27a0ec | 3840 | failed_mount3: |
04496411 | 3841 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
3842 | if (sbi->s_flex_groups) |
3843 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 3844 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
3845 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
3846 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 3847 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c5e06d10 JL |
3848 | if (sbi->s_mmp_tsk) |
3849 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
3850 | failed_mount2: |
3851 | for (i = 0; i < db_count; i++) | |
3852 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 3853 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 3854 | failed_mount: |
240799cd | 3855 | if (sbi->s_proc) { |
9f6200bb | 3856 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3857 | } |
ac27a0ec DK |
3858 | #ifdef CONFIG_QUOTA |
3859 | for (i = 0; i < MAXQUOTAS; i++) | |
3860 | kfree(sbi->s_qf_names[i]); | |
3861 | #endif | |
617ba13b | 3862 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3863 | brelse(bh); |
3864 | out_fail: | |
3865 | sb->s_fs_info = NULL; | |
f6830165 | 3866 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3867 | kfree(sbi); |
dcc7dae3 | 3868 | out_free_orig: |
d4c402d9 | 3869 | kfree(orig_data); |
1d1fe1ee | 3870 | return ret; |
ac27a0ec DK |
3871 | } |
3872 | ||
3873 | /* | |
3874 | * Setup any per-fs journal parameters now. We'll do this both on | |
3875 | * initial mount, once the journal has been initialised but before we've | |
3876 | * done any recovery; and again on any subsequent remount. | |
3877 | */ | |
617ba13b | 3878 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3879 | { |
617ba13b | 3880 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3881 | |
30773840 TT |
3882 | journal->j_commit_interval = sbi->s_commit_interval; |
3883 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3884 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3885 | |
a931da6a | 3886 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3887 | if (test_opt(sb, BARRIER)) |
dab291af | 3888 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3889 | else |
dab291af | 3890 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3891 | if (test_opt(sb, DATA_ERR_ABORT)) |
3892 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3893 | else | |
3894 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3895 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3896 | } |
3897 | ||
617ba13b | 3898 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3899 | unsigned int journal_inum) |
3900 | { | |
3901 | struct inode *journal_inode; | |
3902 | journal_t *journal; | |
3903 | ||
0390131b FM |
3904 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3905 | ||
ac27a0ec DK |
3906 | /* First, test for the existence of a valid inode on disk. Bad |
3907 | * things happen if we iget() an unused inode, as the subsequent | |
3908 | * iput() will try to delete it. */ | |
3909 | ||
1d1fe1ee DH |
3910 | journal_inode = ext4_iget(sb, journal_inum); |
3911 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3912 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3913 | return NULL; |
3914 | } | |
3915 | if (!journal_inode->i_nlink) { | |
3916 | make_bad_inode(journal_inode); | |
3917 | iput(journal_inode); | |
b31e1552 | 3918 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3919 | return NULL; |
3920 | } | |
3921 | ||
e5f8eab8 | 3922 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3923 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3924 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3925 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3926 | iput(journal_inode); |
3927 | return NULL; | |
3928 | } | |
3929 | ||
dab291af | 3930 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3931 | if (!journal) { |
b31e1552 | 3932 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3933 | iput(journal_inode); |
3934 | return NULL; | |
3935 | } | |
3936 | journal->j_private = sb; | |
617ba13b | 3937 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3938 | return journal; |
3939 | } | |
3940 | ||
617ba13b | 3941 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3942 | dev_t j_dev) |
3943 | { | |
2b2d6d01 | 3944 | struct buffer_head *bh; |
ac27a0ec | 3945 | journal_t *journal; |
617ba13b MC |
3946 | ext4_fsblk_t start; |
3947 | ext4_fsblk_t len; | |
ac27a0ec | 3948 | int hblock, blocksize; |
617ba13b | 3949 | ext4_fsblk_t sb_block; |
ac27a0ec | 3950 | unsigned long offset; |
2b2d6d01 | 3951 | struct ext4_super_block *es; |
ac27a0ec DK |
3952 | struct block_device *bdev; |
3953 | ||
0390131b FM |
3954 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3955 | ||
b31e1552 | 3956 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3957 | if (bdev == NULL) |
3958 | return NULL; | |
3959 | ||
ac27a0ec | 3960 | blocksize = sb->s_blocksize; |
e1defc4f | 3961 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3962 | if (blocksize < hblock) { |
b31e1552 ES |
3963 | ext4_msg(sb, KERN_ERR, |
3964 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3965 | goto out_bdev; |
3966 | } | |
3967 | ||
617ba13b MC |
3968 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3969 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3970 | set_blocksize(bdev, blocksize); |
3971 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3972 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3973 | "external journal"); | |
ac27a0ec DK |
3974 | goto out_bdev; |
3975 | } | |
3976 | ||
617ba13b MC |
3977 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3978 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3979 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3980 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3981 | ext4_msg(sb, KERN_ERR, "external journal has " |
3982 | "bad superblock"); | |
ac27a0ec DK |
3983 | brelse(bh); |
3984 | goto out_bdev; | |
3985 | } | |
3986 | ||
617ba13b | 3987 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3988 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3989 | brelse(bh); |
3990 | goto out_bdev; | |
3991 | } | |
3992 | ||
bd81d8ee | 3993 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3994 | start = sb_block + 1; |
3995 | brelse(bh); /* we're done with the superblock */ | |
3996 | ||
dab291af | 3997 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3998 | start, len, blocksize); |
3999 | if (!journal) { | |
b31e1552 | 4000 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4001 | goto out_bdev; |
4002 | } | |
4003 | journal->j_private = sb; | |
4004 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
4005 | wait_on_buffer(journal->j_sb_buffer); | |
4006 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4007 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4008 | goto out_journal; |
4009 | } | |
4010 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4011 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4012 | "user (unsupported) - %d", | |
ac27a0ec DK |
4013 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4014 | goto out_journal; | |
4015 | } | |
617ba13b MC |
4016 | EXT4_SB(sb)->journal_bdev = bdev; |
4017 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4018 | return journal; |
0b8e58a1 | 4019 | |
ac27a0ec | 4020 | out_journal: |
dab291af | 4021 | jbd2_journal_destroy(journal); |
ac27a0ec | 4022 | out_bdev: |
617ba13b | 4023 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4024 | return NULL; |
4025 | } | |
4026 | ||
617ba13b MC |
4027 | static int ext4_load_journal(struct super_block *sb, |
4028 | struct ext4_super_block *es, | |
ac27a0ec DK |
4029 | unsigned long journal_devnum) |
4030 | { | |
4031 | journal_t *journal; | |
4032 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4033 | dev_t journal_dev; | |
4034 | int err = 0; | |
4035 | int really_read_only; | |
4036 | ||
0390131b FM |
4037 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4038 | ||
ac27a0ec DK |
4039 | if (journal_devnum && |
4040 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4041 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4042 | "numbers have changed"); | |
ac27a0ec DK |
4043 | journal_dev = new_decode_dev(journal_devnum); |
4044 | } else | |
4045 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4046 | ||
4047 | really_read_only = bdev_read_only(sb->s_bdev); | |
4048 | ||
4049 | /* | |
4050 | * Are we loading a blank journal or performing recovery after a | |
4051 | * crash? For recovery, we need to check in advance whether we | |
4052 | * can get read-write access to the device. | |
4053 | */ | |
617ba13b | 4054 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4055 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4056 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4057 | "required on readonly filesystem"); | |
ac27a0ec | 4058 | if (really_read_only) { |
b31e1552 ES |
4059 | ext4_msg(sb, KERN_ERR, "write access " |
4060 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4061 | return -EROFS; |
4062 | } | |
b31e1552 ES |
4063 | ext4_msg(sb, KERN_INFO, "write access will " |
4064 | "be enabled during recovery"); | |
ac27a0ec DK |
4065 | } |
4066 | } | |
4067 | ||
4068 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4069 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4070 | "and inode journals!"); | |
ac27a0ec DK |
4071 | return -EINVAL; |
4072 | } | |
4073 | ||
4074 | if (journal_inum) { | |
617ba13b | 4075 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4076 | return -EINVAL; |
4077 | } else { | |
617ba13b | 4078 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4079 | return -EINVAL; |
4080 | } | |
4081 | ||
90576c0b | 4082 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4083 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4084 | |
617ba13b | 4085 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4086 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4087 | if (!err) { |
4088 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4089 | if (save) | |
4090 | memcpy(save, ((char *) es) + | |
4091 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4092 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4093 | if (save) |
4094 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4095 | save, EXT4_S_ERR_LEN); | |
4096 | kfree(save); | |
4097 | } | |
ac27a0ec DK |
4098 | |
4099 | if (err) { | |
b31e1552 | 4100 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4101 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4102 | return err; |
4103 | } | |
4104 | ||
617ba13b MC |
4105 | EXT4_SB(sb)->s_journal = journal; |
4106 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4107 | |
c41303ce | 4108 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4109 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4110 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4111 | |
4112 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4113 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4114 | } |
4115 | ||
4116 | return 0; | |
4117 | } | |
4118 | ||
e2d67052 | 4119 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4120 | { |
e2d67052 | 4121 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4122 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4123 | int error = 0; |
ac27a0ec | 4124 | |
7c2e7087 | 4125 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4126 | return error; |
914258bf TT |
4127 | if (buffer_write_io_error(sbh)) { |
4128 | /* | |
4129 | * Oh, dear. A previous attempt to write the | |
4130 | * superblock failed. This could happen because the | |
4131 | * USB device was yanked out. Or it could happen to | |
4132 | * be a transient write error and maybe the block will | |
4133 | * be remapped. Nothing we can do but to retry the | |
4134 | * write and hope for the best. | |
4135 | */ | |
b31e1552 ES |
4136 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4137 | "superblock detected"); | |
914258bf TT |
4138 | clear_buffer_write_io_error(sbh); |
4139 | set_buffer_uptodate(sbh); | |
4140 | } | |
71290b36 TT |
4141 | /* |
4142 | * If the file system is mounted read-only, don't update the | |
4143 | * superblock write time. This avoids updating the superblock | |
4144 | * write time when we are mounting the root file system | |
4145 | * read/only but we need to replay the journal; at that point, | |
4146 | * for people who are east of GMT and who make their clock | |
4147 | * tick in localtime for Windows bug-for-bug compatibility, | |
4148 | * the clock is set in the future, and this will cause e2fsck | |
4149 | * to complain and force a full file system check. | |
4150 | */ | |
4151 | if (!(sb->s_flags & MS_RDONLY)) | |
4152 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4153 | if (sb->s_bdev->bd_part) |
4154 | es->s_kbytes_written = | |
4155 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4156 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4157 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4158 | else |
4159 | es->s_kbytes_written = | |
4160 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4161 | ext4_free_blocks_count_set(es, |
4162 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4163 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4164 | es->s_free_inodes_count = |
4165 | cpu_to_le32(percpu_counter_sum_positive( | |
4166 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4167 | sb->s_dirt = 0; |
ac27a0ec DK |
4168 | BUFFER_TRACE(sbh, "marking dirty"); |
4169 | mark_buffer_dirty(sbh); | |
914258bf | 4170 | if (sync) { |
c4be0c1d TS |
4171 | error = sync_dirty_buffer(sbh); |
4172 | if (error) | |
4173 | return error; | |
4174 | ||
4175 | error = buffer_write_io_error(sbh); | |
4176 | if (error) { | |
b31e1552 ES |
4177 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4178 | "superblock"); | |
914258bf TT |
4179 | clear_buffer_write_io_error(sbh); |
4180 | set_buffer_uptodate(sbh); | |
4181 | } | |
4182 | } | |
c4be0c1d | 4183 | return error; |
ac27a0ec DK |
4184 | } |
4185 | ||
ac27a0ec DK |
4186 | /* |
4187 | * Have we just finished recovery? If so, and if we are mounting (or | |
4188 | * remounting) the filesystem readonly, then we will end up with a | |
4189 | * consistent fs on disk. Record that fact. | |
4190 | */ | |
2b2d6d01 TT |
4191 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4192 | struct ext4_super_block *es) | |
ac27a0ec | 4193 | { |
617ba13b | 4194 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4195 | |
0390131b FM |
4196 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4197 | BUG_ON(journal != NULL); | |
4198 | return; | |
4199 | } | |
dab291af | 4200 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4201 | if (jbd2_journal_flush(journal) < 0) |
4202 | goto out; | |
4203 | ||
617ba13b | 4204 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4205 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4206 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4207 | ext4_commit_super(sb, 1); |
ac27a0ec | 4208 | } |
7ffe1ea8 HK |
4209 | |
4210 | out: | |
dab291af | 4211 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4212 | } |
4213 | ||
4214 | /* | |
4215 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4216 | * has recorded an error from a previous lifetime, move that error to the | |
4217 | * main filesystem now. | |
4218 | */ | |
2b2d6d01 TT |
4219 | static void ext4_clear_journal_err(struct super_block *sb, |
4220 | struct ext4_super_block *es) | |
ac27a0ec DK |
4221 | { |
4222 | journal_t *journal; | |
4223 | int j_errno; | |
4224 | const char *errstr; | |
4225 | ||
0390131b FM |
4226 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4227 | ||
617ba13b | 4228 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4229 | |
4230 | /* | |
4231 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4232 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4233 | */ |
4234 | ||
dab291af | 4235 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4236 | if (j_errno) { |
4237 | char nbuf[16]; | |
4238 | ||
617ba13b | 4239 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4240 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4241 | "from previous mount: %s", errstr); |
12062ddd | 4242 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4243 | |
617ba13b MC |
4244 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4245 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4246 | ext4_commit_super(sb, 1); |
ac27a0ec | 4247 | |
dab291af | 4248 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4249 | } |
4250 | } | |
4251 | ||
4252 | /* | |
4253 | * Force the running and committing transactions to commit, | |
4254 | * and wait on the commit. | |
4255 | */ | |
617ba13b | 4256 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4257 | { |
4258 | journal_t *journal; | |
0390131b | 4259 | int ret = 0; |
ac27a0ec DK |
4260 | |
4261 | if (sb->s_flags & MS_RDONLY) | |
4262 | return 0; | |
4263 | ||
617ba13b | 4264 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4265 | if (journal) { |
437f88cc | 4266 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4267 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4268 | } |
0390131b | 4269 | |
ac27a0ec DK |
4270 | return ret; |
4271 | } | |
4272 | ||
2b2d6d01 | 4273 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4274 | { |
ebc1ac16 | 4275 | lock_super(sb); |
9ca92389 | 4276 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4277 | unlock_super(sb); |
ac27a0ec DK |
4278 | } |
4279 | ||
617ba13b | 4280 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4281 | { |
14ce0cb4 | 4282 | int ret = 0; |
9eddacf9 | 4283 | tid_t target; |
8d5d02e6 | 4284 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4285 | |
9bffad1e | 4286 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4287 | flush_workqueue(sbi->dio_unwritten_wq); |
4288 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4289 | if (wait) |
8d5d02e6 | 4290 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4291 | } |
14ce0cb4 | 4292 | return ret; |
ac27a0ec DK |
4293 | } |
4294 | ||
4295 | /* | |
4296 | * LVM calls this function before a (read-only) snapshot is created. This | |
4297 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4298 | * |
4299 | * Note that only this function cannot bring a filesystem to be in a clean | |
4300 | * state independently, because ext4 prevents a new handle from being started | |
4301 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from | |
4302 | * the upper layer. | |
ac27a0ec | 4303 | */ |
c4be0c1d | 4304 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4305 | { |
c4be0c1d TS |
4306 | int error = 0; |
4307 | journal_t *journal; | |
ac27a0ec | 4308 | |
9ca92389 TT |
4309 | if (sb->s_flags & MS_RDONLY) |
4310 | return 0; | |
ac27a0ec | 4311 | |
9ca92389 | 4312 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4313 | |
9ca92389 TT |
4314 | /* Now we set up the journal barrier. */ |
4315 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4316 | |
9ca92389 TT |
4317 | /* |
4318 | * Don't clear the needs_recovery flag if we failed to flush | |
4319 | * the journal. | |
4320 | */ | |
4321 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4322 | if (error < 0) |
4323 | goto out; | |
9ca92389 TT |
4324 | |
4325 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4326 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4327 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4328 | out: |
4329 | /* we rely on s_frozen to stop further updates */ | |
4330 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4331 | return error; | |
ac27a0ec DK |
4332 | } |
4333 | ||
4334 | /* | |
4335 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4336 | * flag here, even though the filesystem is not technically dirty yet. | |
4337 | */ | |
c4be0c1d | 4338 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4339 | { |
9ca92389 TT |
4340 | if (sb->s_flags & MS_RDONLY) |
4341 | return 0; | |
4342 | ||
4343 | lock_super(sb); | |
4344 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4345 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4346 | ext4_commit_super(sb, 1); | |
4347 | unlock_super(sb); | |
c4be0c1d | 4348 | return 0; |
ac27a0ec DK |
4349 | } |
4350 | ||
673c6100 TT |
4351 | /* |
4352 | * Structure to save mount options for ext4_remount's benefit | |
4353 | */ | |
4354 | struct ext4_mount_options { | |
4355 | unsigned long s_mount_opt; | |
a2595b8a | 4356 | unsigned long s_mount_opt2; |
673c6100 TT |
4357 | uid_t s_resuid; |
4358 | gid_t s_resgid; | |
4359 | unsigned long s_commit_interval; | |
4360 | u32 s_min_batch_time, s_max_batch_time; | |
4361 | #ifdef CONFIG_QUOTA | |
4362 | int s_jquota_fmt; | |
4363 | char *s_qf_names[MAXQUOTAS]; | |
4364 | #endif | |
4365 | }; | |
4366 | ||
2b2d6d01 | 4367 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4368 | { |
2b2d6d01 | 4369 | struct ext4_super_block *es; |
617ba13b | 4370 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4371 | unsigned long old_sb_flags; |
617ba13b | 4372 | struct ext4_mount_options old_opts; |
c79d967d | 4373 | int enable_quota = 0; |
8a266467 | 4374 | ext4_group_t g; |
b3881f74 | 4375 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4376 | int err = 0; |
ac27a0ec DK |
4377 | #ifdef CONFIG_QUOTA |
4378 | int i; | |
4379 | #endif | |
d4c402d9 | 4380 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4381 | |
4382 | /* Store the original options */ | |
bbd6851a | 4383 | lock_super(sb); |
ac27a0ec DK |
4384 | old_sb_flags = sb->s_flags; |
4385 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4386 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4387 | old_opts.s_resuid = sbi->s_resuid; |
4388 | old_opts.s_resgid = sbi->s_resgid; | |
4389 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4390 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4391 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4392 | #ifdef CONFIG_QUOTA |
4393 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4394 | for (i = 0; i < MAXQUOTAS; i++) | |
4395 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4396 | #endif | |
b3881f74 TT |
4397 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4398 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4399 | |
4400 | /* | |
4401 | * Allow the "check" option to be passed as a remount option. | |
4402 | */ | |
661aa520 | 4403 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4404 | err = -EINVAL; |
4405 | goto restore_opts; | |
4406 | } | |
4407 | ||
4ab2f15b | 4408 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4409 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4410 | |
4411 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4412 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4413 | |
4414 | es = sbi->s_es; | |
4415 | ||
b3881f74 | 4416 | if (sbi->s_journal) { |
0390131b | 4417 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4418 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4419 | } | |
ac27a0ec | 4420 | |
661aa520 | 4421 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4422 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4423 | err = -EROFS; |
4424 | goto restore_opts; | |
4425 | } | |
4426 | ||
4427 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4428 | err = dquot_suspend(sb, -1); |
4429 | if (err < 0) | |
c79d967d | 4430 | goto restore_opts; |
c79d967d | 4431 | |
ac27a0ec DK |
4432 | /* |
4433 | * First of all, the unconditional stuff we have to do | |
4434 | * to disable replay of the journal when we next remount | |
4435 | */ | |
4436 | sb->s_flags |= MS_RDONLY; | |
4437 | ||
4438 | /* | |
4439 | * OK, test if we are remounting a valid rw partition | |
4440 | * readonly, and if so set the rdonly flag and then | |
4441 | * mark the partition as valid again. | |
4442 | */ | |
617ba13b MC |
4443 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4444 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4445 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4446 | ||
a63c9eb2 | 4447 | if (sbi->s_journal) |
0390131b | 4448 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4449 | } else { |
a13fb1a4 ES |
4450 | /* Make sure we can mount this feature set readwrite */ |
4451 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4452 | err = -EROFS; |
4453 | goto restore_opts; | |
4454 | } | |
8a266467 TT |
4455 | /* |
4456 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4457 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4458 | */ |
4459 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4460 | struct ext4_group_desc *gdp = | |
4461 | ext4_get_group_desc(sb, g, NULL); | |
4462 | ||
4463 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4464 | ext4_msg(sb, KERN_ERR, |
4465 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4466 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4467 | le16_to_cpu(gdp->bg_checksum)); | |
4468 | err = -EINVAL; | |
4469 | goto restore_opts; | |
4470 | } | |
4471 | } | |
4472 | ||
ead6596b ES |
4473 | /* |
4474 | * If we have an unprocessed orphan list hanging | |
4475 | * around from a previously readonly bdev mount, | |
4476 | * require a full umount/remount for now. | |
4477 | */ | |
4478 | if (es->s_last_orphan) { | |
b31e1552 | 4479 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4480 | "remount RDWR because of unprocessed " |
4481 | "orphan inode list. Please " | |
b31e1552 | 4482 | "umount/remount instead"); |
ead6596b ES |
4483 | err = -EINVAL; |
4484 | goto restore_opts; | |
4485 | } | |
4486 | ||
ac27a0ec DK |
4487 | /* |
4488 | * Mounting a RDONLY partition read-write, so reread | |
4489 | * and store the current valid flag. (It may have | |
4490 | * been changed by e2fsck since we originally mounted | |
4491 | * the partition.) | |
4492 | */ | |
0390131b FM |
4493 | if (sbi->s_journal) |
4494 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4495 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4496 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4497 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4498 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4499 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4500 | if (ext4_multi_mount_protect(sb, | |
4501 | le64_to_cpu(es->s_mmp_block))) { | |
4502 | err = -EROFS; | |
4503 | goto restore_opts; | |
4504 | } | |
c79d967d | 4505 | enable_quota = 1; |
ac27a0ec DK |
4506 | } |
4507 | } | |
bfff6873 LC |
4508 | |
4509 | /* | |
4510 | * Reinitialize lazy itable initialization thread based on | |
4511 | * current settings | |
4512 | */ | |
4513 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4514 | ext4_unregister_li_request(sb); | |
4515 | else { | |
4516 | ext4_group_t first_not_zeroed; | |
4517 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4518 | ext4_register_li_request(sb, first_not_zeroed); | |
4519 | } | |
4520 | ||
6fd058f7 | 4521 | ext4_setup_system_zone(sb); |
0390131b | 4522 | if (sbi->s_journal == NULL) |
e2d67052 | 4523 | ext4_commit_super(sb, 1); |
0390131b | 4524 | |
ac27a0ec DK |
4525 | #ifdef CONFIG_QUOTA |
4526 | /* Release old quota file names */ | |
4527 | for (i = 0; i < MAXQUOTAS; i++) | |
4528 | if (old_opts.s_qf_names[i] && | |
4529 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4530 | kfree(old_opts.s_qf_names[i]); | |
4531 | #endif | |
bbd6851a | 4532 | unlock_super(sb); |
c79d967d | 4533 | if (enable_quota) |
0f0dd62f | 4534 | dquot_resume(sb, -1); |
d4c402d9 CW |
4535 | |
4536 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4537 | kfree(orig_data); | |
ac27a0ec | 4538 | return 0; |
0b8e58a1 | 4539 | |
ac27a0ec DK |
4540 | restore_opts: |
4541 | sb->s_flags = old_sb_flags; | |
4542 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4543 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4544 | sbi->s_resuid = old_opts.s_resuid; |
4545 | sbi->s_resgid = old_opts.s_resgid; | |
4546 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4547 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4548 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4549 | #ifdef CONFIG_QUOTA |
4550 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4551 | for (i = 0; i < MAXQUOTAS; i++) { | |
4552 | if (sbi->s_qf_names[i] && | |
4553 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4554 | kfree(sbi->s_qf_names[i]); | |
4555 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4556 | } | |
4557 | #endif | |
bbd6851a | 4558 | unlock_super(sb); |
d4c402d9 | 4559 | kfree(orig_data); |
ac27a0ec DK |
4560 | return err; |
4561 | } | |
4562 | ||
f975d6bc TT |
4563 | /* |
4564 | * Note: calculating the overhead so we can be compatible with | |
4565 | * historical BSD practice is quite difficult in the face of | |
4566 | * clusters/bigalloc. This is because multiple metadata blocks from | |
4567 | * different block group can end up in the same allocation cluster. | |
4568 | * Calculating the exact overhead in the face of clustered allocation | |
4569 | * requires either O(all block bitmaps) in memory or O(number of block | |
4570 | * groups**2) in time. We will still calculate the superblock for | |
4571 | * older file systems --- and if we come across with a bigalloc file | |
4572 | * system with zero in s_overhead_clusters the estimate will be close to | |
4573 | * correct especially for very large cluster sizes --- but for newer | |
4574 | * file systems, it's better to calculate this figure once at mkfs | |
4575 | * time, and store it in the superblock. If the superblock value is | |
4576 | * present (even for non-bigalloc file systems), we will use it. | |
4577 | */ | |
2b2d6d01 | 4578 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4579 | { |
4580 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4581 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4582 | struct ext4_super_block *es = sbi->s_es; | |
f975d6bc | 4583 | struct ext4_group_desc *gdp; |
960cc398 | 4584 | u64 fsid; |
d02a9391 | 4585 | s64 bfree; |
ac27a0ec | 4586 | |
5e70030d BP |
4587 | if (test_opt(sb, MINIX_DF)) { |
4588 | sbi->s_overhead_last = 0; | |
f975d6bc TT |
4589 | } else if (es->s_overhead_clusters) { |
4590 | sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); | |
6bc9feff | 4591 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4592 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4593 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4594 | |
4595 | /* | |
5e70030d BP |
4596 | * Compute the overhead (FS structures). This is constant |
4597 | * for a given filesystem unless the number of block groups | |
4598 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4599 | */ |
4600 | ||
4601 | /* | |
4602 | * All of the blocks before first_data_block are | |
4603 | * overhead | |
4604 | */ | |
f975d6bc | 4605 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); |
ac27a0ec DK |
4606 | |
4607 | /* | |
f975d6bc | 4608 | * Add the overhead found in each block group |
ac27a0ec DK |
4609 | */ |
4610 | for (i = 0; i < ngroups; i++) { | |
f975d6bc TT |
4611 | gdp = ext4_get_group_desc(sb, i, NULL); |
4612 | overhead += ext4_num_overhead_clusters(sb, i, gdp); | |
ac27a0ec DK |
4613 | cond_resched(); |
4614 | } | |
5e70030d BP |
4615 | sbi->s_overhead_last = overhead; |
4616 | smp_wmb(); | |
6bc9feff | 4617 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4618 | } |
4619 | ||
617ba13b | 4620 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4621 | buf->f_bsize = sb->s_blocksize; |
f975d6bc TT |
4622 | buf->f_blocks = (ext4_blocks_count(es) - |
4623 | EXT4_C2B(sbi, sbi->s_overhead_last)); | |
57042651 TT |
4624 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4625 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4626 | /* prevent underflow in case that few free space is available */ |
57042651 | 4627 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
bd81d8ee LV |
4628 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4629 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4630 | buf->f_bavail = 0; |
4631 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4632 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4633 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4634 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4635 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4636 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4637 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4638 | |
ac27a0ec DK |
4639 | return 0; |
4640 | } | |
4641 | ||
0b8e58a1 AD |
4642 | /* Helper function for writing quotas on sync - we need to start transaction |
4643 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4644 | * Process 1 Process 2 |
617ba13b | 4645 | * ext4_create() quota_sync() |
a269eb18 | 4646 | * jbd2_journal_start() write_dquot() |
871a2931 | 4647 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4648 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4649 | * |
4650 | */ | |
4651 | ||
4652 | #ifdef CONFIG_QUOTA | |
4653 | ||
4654 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4655 | { | |
4656 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4657 | } | |
4658 | ||
617ba13b | 4659 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4660 | { |
4661 | int ret, err; | |
4662 | handle_t *handle; | |
4663 | struct inode *inode; | |
4664 | ||
4665 | inode = dquot_to_inode(dquot); | |
617ba13b | 4666 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4667 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4668 | if (IS_ERR(handle)) |
4669 | return PTR_ERR(handle); | |
4670 | ret = dquot_commit(dquot); | |
617ba13b | 4671 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4672 | if (!ret) |
4673 | ret = err; | |
4674 | return ret; | |
4675 | } | |
4676 | ||
617ba13b | 4677 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4678 | { |
4679 | int ret, err; | |
4680 | handle_t *handle; | |
4681 | ||
617ba13b | 4682 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4683 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4684 | if (IS_ERR(handle)) |
4685 | return PTR_ERR(handle); | |
4686 | ret = dquot_acquire(dquot); | |
617ba13b | 4687 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4688 | if (!ret) |
4689 | ret = err; | |
4690 | return ret; | |
4691 | } | |
4692 | ||
617ba13b | 4693 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4694 | { |
4695 | int ret, err; | |
4696 | handle_t *handle; | |
4697 | ||
617ba13b | 4698 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4699 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4700 | if (IS_ERR(handle)) { |
4701 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4702 | dquot_release(dquot); | |
ac27a0ec | 4703 | return PTR_ERR(handle); |
9c3013e9 | 4704 | } |
ac27a0ec | 4705 | ret = dquot_release(dquot); |
617ba13b | 4706 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4707 | if (!ret) |
4708 | ret = err; | |
4709 | return ret; | |
4710 | } | |
4711 | ||
617ba13b | 4712 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4713 | { |
2c8be6b2 | 4714 | /* Are we journaling quotas? */ |
617ba13b MC |
4715 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4716 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4717 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4718 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4719 | } else { |
4720 | return dquot_mark_dquot_dirty(dquot); | |
4721 | } | |
4722 | } | |
4723 | ||
617ba13b | 4724 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4725 | { |
4726 | int ret, err; | |
4727 | handle_t *handle; | |
4728 | ||
4729 | /* Data block + inode block */ | |
617ba13b | 4730 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4731 | if (IS_ERR(handle)) |
4732 | return PTR_ERR(handle); | |
4733 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4734 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4735 | if (!ret) |
4736 | ret = err; | |
4737 | return ret; | |
4738 | } | |
4739 | ||
4740 | /* | |
4741 | * Turn on quotas during mount time - we need to find | |
4742 | * the quota file and such... | |
4743 | */ | |
617ba13b | 4744 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4745 | { |
287a8095 CH |
4746 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4747 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4748 | } |
4749 | ||
4750 | /* | |
4751 | * Standard function to be called on quota_on | |
4752 | */ | |
617ba13b | 4753 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4754 | struct path *path) |
ac27a0ec DK |
4755 | { |
4756 | int err; | |
ac27a0ec DK |
4757 | |
4758 | if (!test_opt(sb, QUOTA)) | |
4759 | return -EINVAL; | |
0623543b | 4760 | |
ac27a0ec | 4761 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 4762 | if (path->dentry->d_sb != sb) |
ac27a0ec | 4763 | return -EXDEV; |
0623543b JK |
4764 | /* Journaling quota? */ |
4765 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4766 | /* Quotafile not in fs root? */ |
f00c9e44 | 4767 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4768 | ext4_msg(sb, KERN_WARNING, |
4769 | "Quota file not on filesystem root. " | |
4770 | "Journaled quota will not work"); | |
2b2d6d01 | 4771 | } |
0623543b JK |
4772 | |
4773 | /* | |
4774 | * When we journal data on quota file, we have to flush journal to see | |
4775 | * all updates to the file when we bypass pagecache... | |
4776 | */ | |
0390131b | 4777 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4778 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4779 | /* |
4780 | * We don't need to lock updates but journal_flush() could | |
4781 | * otherwise be livelocked... | |
4782 | */ | |
4783 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4784 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4785 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4786 | if (err) |
7ffe1ea8 | 4787 | return err; |
0623543b JK |
4788 | } |
4789 | ||
f00c9e44 | 4790 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4791 | } |
4792 | ||
ca0e05e4 DM |
4793 | static int ext4_quota_off(struct super_block *sb, int type) |
4794 | { | |
21f97697 JK |
4795 | struct inode *inode = sb_dqopt(sb)->files[type]; |
4796 | handle_t *handle; | |
4797 | ||
87009d86 DM |
4798 | /* Force all delayed allocation blocks to be allocated. |
4799 | * Caller already holds s_umount sem */ | |
4800 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4801 | sync_filesystem(sb); |
ca0e05e4 | 4802 | |
0b268590 AG |
4803 | if (!inode) |
4804 | goto out; | |
4805 | ||
21f97697 JK |
4806 | /* Update modification times of quota files when userspace can |
4807 | * start looking at them */ | |
4808 | handle = ext4_journal_start(inode, 1); | |
4809 | if (IS_ERR(handle)) | |
4810 | goto out; | |
4811 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
4812 | ext4_mark_inode_dirty(handle, inode); | |
4813 | ext4_journal_stop(handle); | |
4814 | ||
4815 | out: | |
ca0e05e4 DM |
4816 | return dquot_quota_off(sb, type); |
4817 | } | |
4818 | ||
ac27a0ec DK |
4819 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4820 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 4821 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 4822 | * we don't have to be afraid of races */ |
617ba13b | 4823 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4824 | size_t len, loff_t off) |
4825 | { | |
4826 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4827 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4828 | int err = 0; |
4829 | int offset = off & (sb->s_blocksize - 1); | |
4830 | int tocopy; | |
4831 | size_t toread; | |
4832 | struct buffer_head *bh; | |
4833 | loff_t i_size = i_size_read(inode); | |
4834 | ||
4835 | if (off > i_size) | |
4836 | return 0; | |
4837 | if (off+len > i_size) | |
4838 | len = i_size-off; | |
4839 | toread = len; | |
4840 | while (toread > 0) { | |
4841 | tocopy = sb->s_blocksize - offset < toread ? | |
4842 | sb->s_blocksize - offset : toread; | |
617ba13b | 4843 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4844 | if (err) |
4845 | return err; | |
4846 | if (!bh) /* A hole? */ | |
4847 | memset(data, 0, tocopy); | |
4848 | else | |
4849 | memcpy(data, bh->b_data+offset, tocopy); | |
4850 | brelse(bh); | |
4851 | offset = 0; | |
4852 | toread -= tocopy; | |
4853 | data += tocopy; | |
4854 | blk++; | |
4855 | } | |
4856 | return len; | |
4857 | } | |
4858 | ||
4859 | /* Write to quotafile (we know the transaction is already started and has | |
4860 | * enough credits) */ | |
617ba13b | 4861 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4862 | const char *data, size_t len, loff_t off) |
4863 | { | |
4864 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4865 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4866 | int err = 0; |
4867 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4868 | struct buffer_head *bh; |
4869 | handle_t *handle = journal_current_handle(); | |
4870 | ||
0390131b | 4871 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4872 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4873 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4874 | (unsigned long long)off, (unsigned long long)len); |
4875 | return -EIO; | |
4876 | } | |
67eeb568 DM |
4877 | /* |
4878 | * Since we account only one data block in transaction credits, | |
4879 | * then it is impossible to cross a block boundary. | |
4880 | */ | |
4881 | if (sb->s_blocksize - offset < len) { | |
4882 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4883 | " cancelled because not block aligned", | |
4884 | (unsigned long long)off, (unsigned long long)len); | |
4885 | return -EIO; | |
4886 | } | |
4887 | ||
ac27a0ec | 4888 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4889 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4890 | if (!bh) | |
4891 | goto out; | |
62d2b5f2 JK |
4892 | err = ext4_journal_get_write_access(handle, bh); |
4893 | if (err) { | |
4894 | brelse(bh); | |
4895 | goto out; | |
ac27a0ec | 4896 | } |
67eeb568 DM |
4897 | lock_buffer(bh); |
4898 | memcpy(bh->b_data+offset, data, len); | |
4899 | flush_dcache_page(bh->b_page); | |
4900 | unlock_buffer(bh); | |
62d2b5f2 | 4901 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4902 | brelse(bh); |
ac27a0ec | 4903 | out: |
67eeb568 | 4904 | if (err) { |
4d04e4fb | 4905 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4906 | return err; |
4d04e4fb | 4907 | } |
67eeb568 DM |
4908 | if (inode->i_size < off + len) { |
4909 | i_size_write(inode, off + len); | |
617ba13b | 4910 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 4911 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4912 | } |
ac27a0ec | 4913 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4914 | return len; |
ac27a0ec DK |
4915 | } |
4916 | ||
4917 | #endif | |
4918 | ||
152a0836 AV |
4919 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4920 | const char *dev_name, void *data) | |
ac27a0ec | 4921 | { |
152a0836 | 4922 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4923 | } |
4924 | ||
37f328eb | 4925 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4926 | static inline void register_as_ext2(void) |
4927 | { | |
4928 | int err = register_filesystem(&ext2_fs_type); | |
4929 | if (err) | |
4930 | printk(KERN_WARNING | |
4931 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4932 | } | |
4933 | ||
4934 | static inline void unregister_as_ext2(void) | |
4935 | { | |
4936 | unregister_filesystem(&ext2_fs_type); | |
4937 | } | |
2035e776 TT |
4938 | |
4939 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
4940 | { | |
4941 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
4942 | return 0; | |
4943 | if (sb->s_flags & MS_RDONLY) | |
4944 | return 1; | |
4945 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
4946 | return 0; | |
4947 | return 1; | |
4948 | } | |
51b7e3c9 | 4949 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4950 | #else |
4951 | static inline void register_as_ext2(void) { } | |
4952 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 4953 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4954 | #endif |
4955 | ||
37f328eb | 4956 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4957 | static inline void register_as_ext3(void) |
4958 | { | |
4959 | int err = register_filesystem(&ext3_fs_type); | |
4960 | if (err) | |
4961 | printk(KERN_WARNING | |
4962 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4963 | } | |
4964 | ||
4965 | static inline void unregister_as_ext3(void) | |
4966 | { | |
4967 | unregister_filesystem(&ext3_fs_type); | |
4968 | } | |
2035e776 TT |
4969 | |
4970 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
4971 | { | |
4972 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
4973 | return 0; | |
4974 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
4975 | return 0; | |
4976 | if (sb->s_flags & MS_RDONLY) | |
4977 | return 1; | |
4978 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
4979 | return 0; | |
4980 | return 1; | |
4981 | } | |
51b7e3c9 | 4982 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4983 | #else |
4984 | static inline void register_as_ext3(void) { } | |
4985 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 4986 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4987 | #endif |
4988 | ||
03010a33 TT |
4989 | static struct file_system_type ext4_fs_type = { |
4990 | .owner = THIS_MODULE, | |
4991 | .name = "ext4", | |
152a0836 | 4992 | .mount = ext4_mount, |
03010a33 TT |
4993 | .kill_sb = kill_block_super, |
4994 | .fs_flags = FS_REQUIRES_DEV, | |
4995 | }; | |
4996 | ||
8f021222 | 4997 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
4998 | { |
4999 | struct ext4_features *ef; | |
5000 | int ret = -ENOMEM; | |
5001 | ||
5002 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5003 | if (!ef) | |
5004 | goto out; | |
5005 | ||
5006 | ef->f_kobj.kset = ext4_kset; | |
5007 | init_completion(&ef->f_kobj_unregister); | |
5008 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5009 | "features"); | |
5010 | if (ret) { | |
5011 | kfree(ef); | |
5012 | goto out; | |
5013 | } | |
5014 | ||
5015 | ext4_feat = ef; | |
5016 | ret = 0; | |
5017 | out: | |
5018 | return ret; | |
5019 | } | |
5020 | ||
8f021222 LC |
5021 | static void ext4_exit_feat_adverts(void) |
5022 | { | |
5023 | kobject_put(&ext4_feat->f_kobj); | |
5024 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5025 | kfree(ext4_feat); | |
5026 | } | |
5027 | ||
e9e3bcec ES |
5028 | /* Shared across all ext4 file systems */ |
5029 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5030 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5031 | ||
5dabfc78 | 5032 | static int __init ext4_init_fs(void) |
ac27a0ec | 5033 | { |
e9e3bcec | 5034 | int i, err; |
c9de560d | 5035 | |
12e9b892 | 5036 | ext4_check_flag_values(); |
e9e3bcec ES |
5037 | |
5038 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5039 | mutex_init(&ext4__aio_mutex[i]); | |
5040 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5041 | } | |
5042 | ||
5dabfc78 | 5043 | err = ext4_init_pageio(); |
6fd058f7 TT |
5044 | if (err) |
5045 | return err; | |
5dabfc78 | 5046 | err = ext4_init_system_zone(); |
bd2d0210 | 5047 | if (err) |
d44651d0 | 5048 | goto out6; |
3197ebdb TT |
5049 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
5050 | if (!ext4_kset) | |
dd68314c | 5051 | goto out5; |
d44651d0 | 5052 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5053 | |
5054 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5055 | if (err) |
5056 | goto out4; | |
857ac889 | 5057 | |
5dabfc78 | 5058 | err = ext4_init_mballoc(); |
ac27a0ec | 5059 | if (err) |
6fd058f7 | 5060 | goto out3; |
c9de560d | 5061 | |
5dabfc78 | 5062 | err = ext4_init_xattr(); |
c9de560d AT |
5063 | if (err) |
5064 | goto out2; | |
ac27a0ec DK |
5065 | err = init_inodecache(); |
5066 | if (err) | |
5067 | goto out1; | |
24b58424 | 5068 | register_as_ext3(); |
2035e776 | 5069 | register_as_ext2(); |
03010a33 | 5070 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5071 | if (err) |
5072 | goto out; | |
bfff6873 LC |
5073 | |
5074 | ext4_li_info = NULL; | |
5075 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
5076 | return 0; |
5077 | out: | |
24b58424 TT |
5078 | unregister_as_ext2(); |
5079 | unregister_as_ext3(); | |
ac27a0ec DK |
5080 | destroy_inodecache(); |
5081 | out1: | |
5dabfc78 | 5082 | ext4_exit_xattr(); |
c9de560d | 5083 | out2: |
5dabfc78 | 5084 | ext4_exit_mballoc(); |
6fd058f7 | 5085 | out3: |
8f021222 | 5086 | ext4_exit_feat_adverts(); |
dd68314c | 5087 | out4: |
d44651d0 FJ |
5088 | if (ext4_proc_root) |
5089 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5090 | kset_unregister(ext4_kset); |
d44651d0 | 5091 | out5: |
5dabfc78 | 5092 | ext4_exit_system_zone(); |
d44651d0 | 5093 | out6: |
5dabfc78 | 5094 | ext4_exit_pageio(); |
ac27a0ec DK |
5095 | return err; |
5096 | } | |
5097 | ||
5dabfc78 | 5098 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5099 | { |
bfff6873 | 5100 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5101 | unregister_as_ext2(); |
5102 | unregister_as_ext3(); | |
03010a33 | 5103 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5104 | destroy_inodecache(); |
5dabfc78 TT |
5105 | ext4_exit_xattr(); |
5106 | ext4_exit_mballoc(); | |
8f021222 | 5107 | ext4_exit_feat_adverts(); |
9f6200bb | 5108 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5109 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5110 | ext4_exit_system_zone(); |
5111 | ext4_exit_pageio(); | |
ac27a0ec DK |
5112 | } |
5113 | ||
5114 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5115 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5116 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5117 | module_init(ext4_init_fs) |
5118 | module_exit(ext4_exit_fs) |