Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
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 | ||
1c13d5c0 | 434 | |
ac27a0ec DK |
435 | /* Deal with the reporting of failure conditions on a filesystem such as |
436 | * inconsistencies detected or read IO failures. | |
437 | * | |
438 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 439 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
440 | * write ordering constraints on the superblock which prevent us from |
441 | * writing it out straight away; and given that the journal is about to | |
442 | * be aborted, we can't rely on the current, or future, transactions to | |
443 | * write out the superblock safely. | |
444 | * | |
dab291af | 445 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 446 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
447 | * that error until we've noted it down and cleared it. |
448 | */ | |
449 | ||
617ba13b | 450 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 451 | { |
ac27a0ec DK |
452 | if (sb->s_flags & MS_RDONLY) |
453 | return; | |
454 | ||
2b2d6d01 | 455 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 456 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 457 | |
4ab2f15b | 458 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 459 | if (journal) |
dab291af | 460 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 461 | } |
2b2d6d01 | 462 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 463 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
464 | sb->s_flags |= MS_RDONLY; |
465 | } | |
ac27a0ec | 466 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 467 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
468 | sb->s_id); |
469 | } | |
470 | ||
12062ddd | 471 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 472 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 473 | { |
0ff2ea7d | 474 | struct va_format vaf; |
ac27a0ec DK |
475 | va_list args; |
476 | ||
477 | va_start(args, fmt); | |
0ff2ea7d JP |
478 | vaf.fmt = fmt; |
479 | vaf.va = &args; | |
480 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
481 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
482 | va_end(args); |
483 | ||
617ba13b | 484 | ext4_handle_error(sb); |
ac27a0ec DK |
485 | } |
486 | ||
c398eda0 TT |
487 | void ext4_error_inode(struct inode *inode, const char *function, |
488 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
489 | const char *fmt, ...) |
490 | { | |
491 | va_list args; | |
f7c21177 | 492 | struct va_format vaf; |
1c13d5c0 | 493 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 494 | |
1c13d5c0 TT |
495 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
496 | es->s_last_error_block = cpu_to_le64(block); | |
497 | save_error_info(inode->i_sb, function, line); | |
273df556 | 498 | va_start(args, fmt); |
f7c21177 TT |
499 | vaf.fmt = fmt; |
500 | vaf.va = &args; | |
c398eda0 TT |
501 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
502 | inode->i_sb->s_id, function, line, inode->i_ino); | |
503 | if (block) | |
f7c21177 TT |
504 | printk(KERN_CONT "block %llu: ", block); |
505 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
506 | va_end(args); |
507 | ||
508 | ext4_handle_error(inode->i_sb); | |
509 | } | |
510 | ||
c398eda0 | 511 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
512 | unsigned int line, ext4_fsblk_t block, |
513 | const char *fmt, ...) | |
273df556 FM |
514 | { |
515 | va_list args; | |
f7c21177 | 516 | struct va_format vaf; |
1c13d5c0 | 517 | struct ext4_super_block *es; |
273df556 FM |
518 | struct inode *inode = file->f_dentry->d_inode; |
519 | char pathname[80], *path; | |
520 | ||
1c13d5c0 TT |
521 | es = EXT4_SB(inode->i_sb)->s_es; |
522 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
523 | save_error_info(inode->i_sb, function, line); | |
273df556 | 524 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 525 | if (IS_ERR(path)) |
273df556 FM |
526 | path = "(unknown)"; |
527 | printk(KERN_CRIT | |
f7c21177 TT |
528 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
529 | inode->i_sb->s_id, function, line, inode->i_ino); | |
530 | if (block) | |
531 | printk(KERN_CONT "block %llu: ", block); | |
532 | va_start(args, fmt); | |
533 | vaf.fmt = fmt; | |
534 | vaf.va = &args; | |
535 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
536 | va_end(args); |
537 | ||
538 | ext4_handle_error(inode->i_sb); | |
539 | } | |
540 | ||
2b2d6d01 | 541 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
542 | char nbuf[16]) |
543 | { | |
544 | char *errstr = NULL; | |
545 | ||
546 | switch (errno) { | |
547 | case -EIO: | |
548 | errstr = "IO failure"; | |
549 | break; | |
550 | case -ENOMEM: | |
551 | errstr = "Out of memory"; | |
552 | break; | |
553 | case -EROFS: | |
78f1ddbb TT |
554 | if (!sb || (EXT4_SB(sb)->s_journal && |
555 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
556 | errstr = "Journal has aborted"; |
557 | else | |
558 | errstr = "Readonly filesystem"; | |
559 | break; | |
560 | default: | |
561 | /* If the caller passed in an extra buffer for unknown | |
562 | * errors, textualise them now. Else we just return | |
563 | * NULL. */ | |
564 | if (nbuf) { | |
565 | /* Check for truncated error codes... */ | |
566 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
567 | errstr = nbuf; | |
568 | } | |
569 | break; | |
570 | } | |
571 | ||
572 | return errstr; | |
573 | } | |
574 | ||
617ba13b | 575 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
576 | * automatically and invokes the appropriate error response. */ |
577 | ||
c398eda0 TT |
578 | void __ext4_std_error(struct super_block *sb, const char *function, |
579 | unsigned int line, int errno) | |
ac27a0ec DK |
580 | { |
581 | char nbuf[16]; | |
582 | const char *errstr; | |
583 | ||
584 | /* Special case: if the error is EROFS, and we're not already | |
585 | * inside a transaction, then there's really no point in logging | |
586 | * an error. */ | |
587 | if (errno == -EROFS && journal_current_handle() == NULL && | |
588 | (sb->s_flags & MS_RDONLY)) | |
589 | return; | |
590 | ||
617ba13b | 591 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
592 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
593 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 594 | save_error_info(sb, function, line); |
ac27a0ec | 595 | |
617ba13b | 596 | ext4_handle_error(sb); |
ac27a0ec DK |
597 | } |
598 | ||
599 | /* | |
617ba13b | 600 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
601 | * abort function may be used to deal with unrecoverable failures such |
602 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
603 | * | |
604 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
605 | * unless the error response on the fs has been set to panic in which | |
606 | * case we take the easy way out and panic immediately. | |
607 | */ | |
608 | ||
c67d859e | 609 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 610 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
611 | { |
612 | va_list args; | |
613 | ||
1c13d5c0 | 614 | save_error_info(sb, function, line); |
ac27a0ec | 615 | va_start(args, fmt); |
c398eda0 TT |
616 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
617 | function, line); | |
ac27a0ec DK |
618 | vprintk(fmt, args); |
619 | printk("\n"); | |
620 | va_end(args); | |
621 | ||
1c13d5c0 TT |
622 | if ((sb->s_flags & MS_RDONLY) == 0) { |
623 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
624 | sb->s_flags |= MS_RDONLY; | |
625 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
626 | if (EXT4_SB(sb)->s_journal) | |
627 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
628 | save_error_info(sb, function, line); | |
629 | } | |
ac27a0ec | 630 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 631 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
632 | } |
633 | ||
0ff2ea7d | 634 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 635 | { |
0ff2ea7d | 636 | struct va_format vaf; |
b31e1552 ES |
637 | va_list args; |
638 | ||
639 | va_start(args, fmt); | |
0ff2ea7d JP |
640 | vaf.fmt = fmt; |
641 | vaf.va = &args; | |
642 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
643 | va_end(args); |
644 | } | |
645 | ||
12062ddd | 646 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 647 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 648 | { |
0ff2ea7d | 649 | struct va_format vaf; |
ac27a0ec DK |
650 | va_list args; |
651 | ||
652 | va_start(args, fmt); | |
0ff2ea7d JP |
653 | vaf.fmt = fmt; |
654 | vaf.va = &args; | |
655 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
656 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
657 | va_end(args); |
658 | } | |
659 | ||
e29136f8 TT |
660 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
661 | struct super_block *sb, ext4_group_t grp, | |
662 | unsigned long ino, ext4_fsblk_t block, | |
663 | const char *fmt, ...) | |
5d1b1b3f AK |
664 | __releases(bitlock) |
665 | __acquires(bitlock) | |
666 | { | |
0ff2ea7d | 667 | struct va_format vaf; |
5d1b1b3f AK |
668 | va_list args; |
669 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
670 | ||
1c13d5c0 TT |
671 | es->s_last_error_ino = cpu_to_le32(ino); |
672 | es->s_last_error_block = cpu_to_le64(block); | |
673 | __save_error_info(sb, function, line); | |
0ff2ea7d | 674 | |
5d1b1b3f | 675 | va_start(args, fmt); |
0ff2ea7d JP |
676 | |
677 | vaf.fmt = fmt; | |
678 | vaf.va = &args; | |
21149d61 | 679 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
680 | sb->s_id, function, line, grp); |
681 | if (ino) | |
0ff2ea7d | 682 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 683 | if (block) |
0ff2ea7d JP |
684 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
685 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
686 | va_end(args); |
687 | ||
688 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 689 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
690 | return; |
691 | } | |
1c13d5c0 | 692 | |
5d1b1b3f AK |
693 | ext4_unlock_group(sb, grp); |
694 | ext4_handle_error(sb); | |
695 | /* | |
696 | * We only get here in the ERRORS_RO case; relocking the group | |
697 | * may be dangerous, but nothing bad will happen since the | |
698 | * filesystem will have already been marked read/only and the | |
699 | * journal has been aborted. We return 1 as a hint to callers | |
700 | * who might what to use the return value from | |
25985edc | 701 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
702 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
703 | * aggressively from the ext4 function in question, with a | |
704 | * more appropriate error code. | |
705 | */ | |
706 | ext4_lock_group(sb, grp); | |
707 | return; | |
708 | } | |
709 | ||
617ba13b | 710 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 711 | { |
617ba13b | 712 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 713 | |
617ba13b | 714 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
715 | return; |
716 | ||
12062ddd | 717 | ext4_warning(sb, |
ac27a0ec DK |
718 | "updating to rev %d because of new feature flag, " |
719 | "running e2fsck is recommended", | |
617ba13b | 720 | EXT4_DYNAMIC_REV); |
ac27a0ec | 721 | |
617ba13b MC |
722 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
723 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
724 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
725 | /* leave es->s_feature_*compat flags alone */ |
726 | /* es->s_uuid will be set by e2fsck if empty */ | |
727 | ||
728 | /* | |
729 | * The rest of the superblock fields should be zero, and if not it | |
730 | * means they are likely already in use, so leave them alone. We | |
731 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
732 | */ | |
733 | } | |
734 | ||
735 | /* | |
736 | * Open the external journal device | |
737 | */ | |
b31e1552 | 738 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
739 | { |
740 | struct block_device *bdev; | |
741 | char b[BDEVNAME_SIZE]; | |
742 | ||
d4d77629 | 743 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
744 | if (IS_ERR(bdev)) |
745 | goto fail; | |
746 | return bdev; | |
747 | ||
748 | fail: | |
b31e1552 | 749 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
750 | __bdevname(dev, b), PTR_ERR(bdev)); |
751 | return NULL; | |
752 | } | |
753 | ||
754 | /* | |
755 | * Release the journal device | |
756 | */ | |
617ba13b | 757 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 758 | { |
e525fd89 | 759 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
760 | } |
761 | ||
617ba13b | 762 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
763 | { |
764 | struct block_device *bdev; | |
765 | int ret = -ENODEV; | |
766 | ||
767 | bdev = sbi->journal_bdev; | |
768 | if (bdev) { | |
617ba13b | 769 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
770 | sbi->journal_bdev = NULL; |
771 | } | |
772 | return ret; | |
773 | } | |
774 | ||
775 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
776 | { | |
617ba13b | 777 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
778 | } |
779 | ||
617ba13b | 780 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
781 | { |
782 | struct list_head *l; | |
783 | ||
b31e1552 ES |
784 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
785 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
786 | |
787 | printk(KERN_ERR "sb_info orphan list:\n"); | |
788 | list_for_each(l, &sbi->s_orphan) { | |
789 | struct inode *inode = orphan_list_entry(l); | |
790 | printk(KERN_ERR " " | |
791 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
792 | inode->i_sb->s_id, inode->i_ino, inode, | |
793 | inode->i_mode, inode->i_nlink, | |
794 | NEXT_ORPHAN(inode)); | |
795 | } | |
796 | } | |
797 | ||
2b2d6d01 | 798 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 799 | { |
617ba13b MC |
800 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
801 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 802 | int i, err; |
ac27a0ec | 803 | |
857ac889 | 804 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
805 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
806 | ||
4c0425ff MC |
807 | flush_workqueue(sbi->dio_unwritten_wq); |
808 | destroy_workqueue(sbi->dio_unwritten_wq); | |
809 | ||
a9e220f8 | 810 | lock_super(sb); |
8c85e125 | 811 | if (sb->s_dirt) |
ebc1ac16 | 812 | ext4_commit_super(sb, 1); |
8c85e125 | 813 | |
0390131b FM |
814 | if (sbi->s_journal) { |
815 | err = jbd2_journal_destroy(sbi->s_journal); | |
816 | sbi->s_journal = NULL; | |
817 | if (err < 0) | |
c67d859e | 818 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 819 | } |
d4edac31 | 820 | |
a1c6c569 | 821 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
822 | ext4_release_system_zone(sb); |
823 | ext4_mb_release(sb); | |
824 | ext4_ext_release(sb); | |
825 | ext4_xattr_put_super(sb); | |
826 | ||
ac27a0ec | 827 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 828 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 829 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 830 | ext4_commit_super(sb, 1); |
ac27a0ec | 831 | } |
240799cd | 832 | if (sbi->s_proc) { |
9f6200bb | 833 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 834 | } |
3197ebdb | 835 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
836 | |
837 | for (i = 0; i < sbi->s_gdb_count; i++) | |
838 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 839 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 840 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 841 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
842 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
843 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 844 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
845 | brelse(sbi->s_sbh); |
846 | #ifdef CONFIG_QUOTA | |
847 | for (i = 0; i < MAXQUOTAS; i++) | |
848 | kfree(sbi->s_qf_names[i]); | |
849 | #endif | |
850 | ||
851 | /* Debugging code just in case the in-memory inode orphan list | |
852 | * isn't empty. The on-disk one can be non-empty if we've | |
853 | * detected an error and taken the fs readonly, but the | |
854 | * in-memory list had better be clean by this point. */ | |
855 | if (!list_empty(&sbi->s_orphan)) | |
856 | dump_orphan_list(sb, sbi); | |
857 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
858 | ||
f98393a6 | 859 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
860 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
861 | /* | |
862 | * Invalidate the journal device's buffers. We don't want them | |
863 | * floating about in memory - the physical journal device may | |
864 | * hotswapped, and it breaks the `ro-after' testing code. | |
865 | */ | |
866 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 867 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 868 | ext4_blkdev_remove(sbi); |
ac27a0ec | 869 | } |
c5e06d10 JL |
870 | if (sbi->s_mmp_tsk) |
871 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 872 | sb->s_fs_info = NULL; |
3197ebdb TT |
873 | /* |
874 | * Now that we are completely done shutting down the | |
875 | * superblock, we need to actually destroy the kobject. | |
876 | */ | |
3197ebdb TT |
877 | unlock_super(sb); |
878 | kobject_put(&sbi->s_kobj); | |
879 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 880 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 881 | kfree(sbi); |
ac27a0ec DK |
882 | } |
883 | ||
e18b890b | 884 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
885 | |
886 | /* | |
887 | * Called inside transaction, so use GFP_NOFS | |
888 | */ | |
617ba13b | 889 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 890 | { |
617ba13b | 891 | struct ext4_inode_info *ei; |
ac27a0ec | 892 | |
e6b4f8da | 893 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
894 | if (!ei) |
895 | return NULL; | |
0b8e58a1 | 896 | |
ac27a0ec | 897 | ei->vfs_inode.i_version = 1; |
91246c00 | 898 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 899 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
900 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
901 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
902 | ei->i_reserved_data_blocks = 0; |
903 | ei->i_reserved_meta_blocks = 0; | |
904 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 905 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 906 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
907 | #ifdef CONFIG_QUOTA |
908 | ei->i_reserved_quota = 0; | |
909 | #endif | |
8aefcd55 | 910 | ei->jinode = NULL; |
c7064ef1 | 911 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 912 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 913 | ei->cur_aio_dio = NULL; |
b436b9be JK |
914 | ei->i_sync_tid = 0; |
915 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 916 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 917 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 918 | |
ac27a0ec DK |
919 | return &ei->vfs_inode; |
920 | } | |
921 | ||
7ff9c073 TT |
922 | static int ext4_drop_inode(struct inode *inode) |
923 | { | |
924 | int drop = generic_drop_inode(inode); | |
925 | ||
926 | trace_ext4_drop_inode(inode, drop); | |
927 | return drop; | |
928 | } | |
929 | ||
fa0d7e3d NP |
930 | static void ext4_i_callback(struct rcu_head *head) |
931 | { | |
932 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
933 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
934 | } | |
935 | ||
617ba13b | 936 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 937 | { |
9f7dd93d | 938 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
939 | ext4_msg(inode->i_sb, KERN_ERR, |
940 | "Inode %lu (%p): orphan list check failed!", | |
941 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
942 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
943 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
944 | true); | |
945 | dump_stack(); | |
946 | } | |
fa0d7e3d | 947 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
948 | } |
949 | ||
51cc5068 | 950 | static void init_once(void *foo) |
ac27a0ec | 951 | { |
617ba13b | 952 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 953 | |
a35afb83 | 954 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 955 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 956 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 957 | #endif |
0e855ac8 | 958 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 959 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
960 | } |
961 | ||
962 | static int init_inodecache(void) | |
963 | { | |
617ba13b MC |
964 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
965 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
966 | 0, (SLAB_RECLAIM_ACCOUNT| |
967 | SLAB_MEM_SPREAD), | |
20c2df83 | 968 | init_once); |
617ba13b | 969 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
970 | return -ENOMEM; |
971 | return 0; | |
972 | } | |
973 | ||
974 | static void destroy_inodecache(void) | |
975 | { | |
617ba13b | 976 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
977 | } |
978 | ||
0930fcc1 | 979 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 980 | { |
0930fcc1 AV |
981 | invalidate_inode_buffers(inode); |
982 | end_writeback(inode); | |
9f754758 | 983 | dquot_drop(inode); |
c2ea3fde | 984 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
985 | if (EXT4_I(inode)->jinode) { |
986 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
987 | EXT4_I(inode)->jinode); | |
988 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
989 | EXT4_I(inode)->jinode = NULL; | |
990 | } | |
ac27a0ec DK |
991 | } |
992 | ||
2b2d6d01 TT |
993 | static inline void ext4_show_quota_options(struct seq_file *seq, |
994 | struct super_block *sb) | |
ac27a0ec DK |
995 | { |
996 | #if defined(CONFIG_QUOTA) | |
617ba13b | 997 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 998 | |
5a20bdfc JK |
999 | if (sbi->s_jquota_fmt) { |
1000 | char *fmtname = ""; | |
1001 | ||
1002 | switch (sbi->s_jquota_fmt) { | |
1003 | case QFMT_VFS_OLD: | |
1004 | fmtname = "vfsold"; | |
1005 | break; | |
1006 | case QFMT_VFS_V0: | |
1007 | fmtname = "vfsv0"; | |
1008 | break; | |
1009 | case QFMT_VFS_V1: | |
1010 | fmtname = "vfsv1"; | |
1011 | break; | |
1012 | } | |
1013 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1014 | } | |
ac27a0ec DK |
1015 | |
1016 | if (sbi->s_qf_names[USRQUOTA]) | |
1017 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1018 | ||
1019 | if (sbi->s_qf_names[GRPQUOTA]) | |
1020 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1021 | ||
482a7425 | 1022 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
1023 | seq_puts(seq, ",usrquota"); |
1024 | ||
482a7425 | 1025 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
1026 | seq_puts(seq, ",grpquota"); |
1027 | #endif | |
1028 | } | |
1029 | ||
d9c9bef1 MS |
1030 | /* |
1031 | * Show an option if | |
1032 | * - it's set to a non-default value OR | |
1033 | * - if the per-sb default is different from the global default | |
1034 | */ | |
617ba13b | 1035 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 1036 | { |
aa22df2c AK |
1037 | int def_errors; |
1038 | unsigned long def_mount_opts; | |
ac27a0ec | 1039 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
1040 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1041 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
1042 | |
1043 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 1044 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
1045 | |
1046 | if (sbi->s_sb_block != 1) | |
1047 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
1048 | if (test_opt(sb, MINIX_DF)) | |
1049 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 1050 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
1051 | seq_puts(seq, ",grpid"); |
1052 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
1053 | seq_puts(seq, ",nogrpid"); | |
1054 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
1055 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
1056 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
1057 | } | |
1058 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
1059 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
1060 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
1061 | } | |
bb4f397a | 1062 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 1063 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
1064 | def_errors == EXT4_ERRORS_CONTINUE) { |
1065 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
1066 | } |
1067 | } | |
aa22df2c | 1068 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 1069 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 1070 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 1071 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 1072 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 1073 | seq_puts(seq, ",nouid32"); |
aa22df2c | 1074 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 | 1075 | seq_puts(seq, ",debug"); |
03010a33 | 1076 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 1077 | if (test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1078 | seq_puts(seq, ",user_xattr"); |
ea663336 | 1079 | if (!test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1080 | seq_puts(seq, ",nouser_xattr"); |
d9c9bef1 | 1081 | #endif |
03010a33 | 1082 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1083 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1084 | seq_puts(seq, ",acl"); |
1085 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1086 | seq_puts(seq, ",noacl"); | |
1087 | #endif | |
30773840 | 1088 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1089 | seq_printf(seq, ",commit=%u", |
1090 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1091 | } | |
30773840 TT |
1092 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1093 | seq_printf(seq, ",min_batch_time=%u", | |
1094 | (unsigned) sbi->s_min_batch_time); | |
1095 | } | |
1096 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1097 | seq_printf(seq, ",max_batch_time=%u", | |
1098 | (unsigned) sbi->s_min_batch_time); | |
1099 | } | |
1100 | ||
571640ca ES |
1101 | /* |
1102 | * We're changing the default of barrier mount option, so | |
1103 | * let's always display its mount state so it's clear what its | |
1104 | * status is. | |
1105 | */ | |
1106 | seq_puts(seq, ",barrier="); | |
1107 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1108 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1109 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1110 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1111 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1112 | if (test_opt(sb, I_VERSION)) |
1113 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1114 | if (!test_opt(sb, DELALLOC) && |
1115 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1116 | seq_puts(seq, ",nodelalloc"); |
1117 | ||
6fd7a467 TT |
1118 | if (!test_opt(sb, MBLK_IO_SUBMIT)) |
1119 | seq_puts(seq, ",nomblk_io_submit"); | |
cb45bbe4 MS |
1120 | if (sbi->s_stripe) |
1121 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1122 | /* |
1123 | * journal mode get enabled in different ways | |
1124 | * So just print the value even if we didn't specify it | |
1125 | */ | |
617ba13b | 1126 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1127 | seq_puts(seq, ",data=journal"); |
617ba13b | 1128 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1129 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1130 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1131 | seq_puts(seq, ",data=writeback"); |
1132 | ||
240799cd TT |
1133 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1134 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1135 | sbi->s_inode_readahead_blks); | |
1136 | ||
5bf5683a HK |
1137 | if (test_opt(sb, DATA_ERR_ABORT)) |
1138 | seq_puts(seq, ",data_err=abort"); | |
1139 | ||
afd4672d | 1140 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1141 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1142 | |
8b67f04a | 1143 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1144 | seq_puts(seq, ",discard"); |
1145 | ||
e3bb52ae ES |
1146 | if (test_opt(sb, NOLOAD)) |
1147 | seq_puts(seq, ",norecovery"); | |
1148 | ||
744692dc JZ |
1149 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1150 | seq_puts(seq, ",dioread_nolock"); | |
1151 | ||
8b67f04a TT |
1152 | if (test_opt(sb, BLOCK_VALIDITY) && |
1153 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1154 | seq_puts(seq, ",block_validity"); | |
1155 | ||
bfff6873 | 1156 | if (!test_opt(sb, INIT_INODE_TABLE)) |
fc6cb1cd | 1157 | seq_puts(seq, ",noinit_itable"); |
51ce6511 | 1158 | else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) |
fc6cb1cd | 1159 | seq_printf(seq, ",init_itable=%u", |
bfff6873 LC |
1160 | (unsigned) sbi->s_li_wait_mult); |
1161 | ||
617ba13b | 1162 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1163 | |
ac27a0ec DK |
1164 | return 0; |
1165 | } | |
1166 | ||
1b961ac0 | 1167 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1168 | u64 ino, u32 generation) |
ac27a0ec | 1169 | { |
ac27a0ec | 1170 | struct inode *inode; |
ac27a0ec | 1171 | |
617ba13b | 1172 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1173 | return ERR_PTR(-ESTALE); |
617ba13b | 1174 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1175 | return ERR_PTR(-ESTALE); |
1176 | ||
1177 | /* iget isn't really right if the inode is currently unallocated!! | |
1178 | * | |
617ba13b | 1179 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1180 | * deleted, so we should be safe. |
1181 | * | |
1182 | * Currently we don't know the generation for parent directory, so | |
1183 | * a generation of 0 means "accept any" | |
1184 | */ | |
1d1fe1ee DH |
1185 | inode = ext4_iget(sb, ino); |
1186 | if (IS_ERR(inode)) | |
1187 | return ERR_CAST(inode); | |
1188 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1189 | iput(inode); |
1190 | return ERR_PTR(-ESTALE); | |
1191 | } | |
1b961ac0 CH |
1192 | |
1193 | return inode; | |
1194 | } | |
1195 | ||
1196 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1197 | int fh_len, int fh_type) |
1b961ac0 CH |
1198 | { |
1199 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1200 | ext4_nfs_get_inode); | |
1201 | } | |
1202 | ||
1203 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1204 | int fh_len, int fh_type) |
1b961ac0 CH |
1205 | { |
1206 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1207 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1208 | } |
1209 | ||
c39a7f84 TO |
1210 | /* |
1211 | * Try to release metadata pages (indirect blocks, directories) which are | |
1212 | * mapped via the block device. Since these pages could have journal heads | |
1213 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1214 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1215 | */ | |
0b8e58a1 AD |
1216 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1217 | gfp_t wait) | |
c39a7f84 TO |
1218 | { |
1219 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1220 | ||
1221 | WARN_ON(PageChecked(page)); | |
1222 | if (!page_has_buffers(page)) | |
1223 | return 0; | |
1224 | if (journal) | |
1225 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1226 | wait & ~__GFP_WAIT); | |
1227 | return try_to_free_buffers(page); | |
1228 | } | |
1229 | ||
ac27a0ec | 1230 | #ifdef CONFIG_QUOTA |
af5bc92d | 1231 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1232 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1233 | |
617ba13b MC |
1234 | static int ext4_write_dquot(struct dquot *dquot); |
1235 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1236 | static int ext4_release_dquot(struct dquot *dquot); | |
1237 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1238 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1239 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1240 | struct path *path); |
ca0e05e4 | 1241 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1242 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1243 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1244 | size_t len, loff_t off); |
617ba13b | 1245 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1246 | const char *data, size_t len, loff_t off); |
1247 | ||
61e225dc | 1248 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1249 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1250 | .write_dquot = ext4_write_dquot, |
1251 | .acquire_dquot = ext4_acquire_dquot, | |
1252 | .release_dquot = ext4_release_dquot, | |
1253 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1254 | .write_info = ext4_write_info, |
1255 | .alloc_dquot = dquot_alloc, | |
1256 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1257 | }; |
1258 | ||
0d54b217 | 1259 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1260 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1261 | .quota_off = ext4_quota_off, |
287a8095 CH |
1262 | .quota_sync = dquot_quota_sync, |
1263 | .get_info = dquot_get_dqinfo, | |
1264 | .set_info = dquot_set_dqinfo, | |
1265 | .get_dqblk = dquot_get_dqblk, | |
1266 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1267 | }; |
1268 | #endif | |
1269 | ||
ee9b6d61 | 1270 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1271 | .alloc_inode = ext4_alloc_inode, |
1272 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1273 | .write_inode = ext4_write_inode, |
1274 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1275 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1276 | .evict_inode = ext4_evict_inode, |
617ba13b | 1277 | .put_super = ext4_put_super, |
617ba13b | 1278 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1279 | .freeze_fs = ext4_freeze, |
1280 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1281 | .statfs = ext4_statfs, |
1282 | .remount_fs = ext4_remount, | |
617ba13b | 1283 | .show_options = ext4_show_options, |
ac27a0ec | 1284 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1285 | .quota_read = ext4_quota_read, |
1286 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1287 | #endif |
c39a7f84 | 1288 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1289 | }; |
1290 | ||
9ca92389 TT |
1291 | static const struct super_operations ext4_nojournal_sops = { |
1292 | .alloc_inode = ext4_alloc_inode, | |
1293 | .destroy_inode = ext4_destroy_inode, | |
1294 | .write_inode = ext4_write_inode, | |
1295 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1296 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1297 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1298 | .write_super = ext4_write_super, |
1299 | .put_super = ext4_put_super, | |
1300 | .statfs = ext4_statfs, | |
1301 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1302 | .show_options = ext4_show_options, |
1303 | #ifdef CONFIG_QUOTA | |
1304 | .quota_read = ext4_quota_read, | |
1305 | .quota_write = ext4_quota_write, | |
1306 | #endif | |
1307 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1308 | }; | |
1309 | ||
39655164 | 1310 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1311 | .fh_to_dentry = ext4_fh_to_dentry, |
1312 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1313 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1314 | }; |
1315 | ||
1316 | enum { | |
1317 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1318 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1319 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1320 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1321 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1322 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1323 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1324 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1325 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1326 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1327 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1328 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1329 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1330 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
1449032b TT |
1331 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1332 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1333 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1334 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1335 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
ac27a0ec DK |
1336 | }; |
1337 | ||
a447c093 | 1338 | static const match_table_t tokens = { |
ac27a0ec DK |
1339 | {Opt_bsd_df, "bsddf"}, |
1340 | {Opt_minix_df, "minixdf"}, | |
1341 | {Opt_grpid, "grpid"}, | |
1342 | {Opt_grpid, "bsdgroups"}, | |
1343 | {Opt_nogrpid, "nogrpid"}, | |
1344 | {Opt_nogrpid, "sysvgroups"}, | |
1345 | {Opt_resgid, "resgid=%u"}, | |
1346 | {Opt_resuid, "resuid=%u"}, | |
1347 | {Opt_sb, "sb=%u"}, | |
1348 | {Opt_err_cont, "errors=continue"}, | |
1349 | {Opt_err_panic, "errors=panic"}, | |
1350 | {Opt_err_ro, "errors=remount-ro"}, | |
1351 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1352 | {Opt_debug, "debug"}, |
1353 | {Opt_oldalloc, "oldalloc"}, | |
1354 | {Opt_orlov, "orlov"}, | |
1355 | {Opt_user_xattr, "user_xattr"}, | |
1356 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1357 | {Opt_acl, "acl"}, | |
1358 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1359 | {Opt_noload, "noload"}, |
e3bb52ae | 1360 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1361 | {Opt_nobh, "nobh"}, |
1362 | {Opt_bh, "bh"}, | |
1363 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1364 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1365 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1366 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1367 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1368 | {Opt_journal_checksum, "journal_checksum"}, |
1369 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1370 | {Opt_abort, "abort"}, |
1371 | {Opt_data_journal, "data=journal"}, | |
1372 | {Opt_data_ordered, "data=ordered"}, | |
1373 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1374 | {Opt_data_err_abort, "data_err=abort"}, |
1375 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1376 | {Opt_offusrjquota, "usrjquota="}, |
1377 | {Opt_usrjquota, "usrjquota=%s"}, | |
1378 | {Opt_offgrpjquota, "grpjquota="}, | |
1379 | {Opt_grpjquota, "grpjquota=%s"}, | |
1380 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1381 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1382 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1383 | {Opt_grpquota, "grpquota"}, |
1384 | {Opt_noquota, "noquota"}, | |
1385 | {Opt_quota, "quota"}, | |
1386 | {Opt_usrquota, "usrquota"}, | |
1387 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1388 | {Opt_barrier, "barrier"}, |
1389 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1390 | {Opt_i_version, "i_version"}, |
c9de560d | 1391 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1392 | {Opt_resize, "resize"}, |
64769240 | 1393 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1394 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1395 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1396 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1397 | {Opt_block_validity, "block_validity"}, |
1398 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1399 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1400 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1401 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1402 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1403 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1404 | {Opt_dioread_nolock, "dioread_nolock"}, |
1405 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1406 | {Opt_discard, "discard"}, |
1407 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1408 | {Opt_init_itable, "init_itable=%u"}, |
1409 | {Opt_init_itable, "init_itable"}, | |
1410 | {Opt_noinit_itable, "noinit_itable"}, | |
f3f12faa | 1411 | {Opt_err, NULL}, |
ac27a0ec DK |
1412 | }; |
1413 | ||
617ba13b | 1414 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1415 | { |
617ba13b | 1416 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1417 | char *options = (char *) *data; |
1418 | ||
1419 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1420 | return 1; /* Default location */ | |
0b8e58a1 | 1421 | |
ac27a0ec | 1422 | options += 3; |
0b8e58a1 | 1423 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1424 | sb_block = simple_strtoul(options, &options, 0); |
1425 | if (*options && *options != ',') { | |
4776004f | 1426 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1427 | (char *) *data); |
1428 | return 1; | |
1429 | } | |
1430 | if (*options == ',') | |
1431 | options++; | |
1432 | *data = (void *) options; | |
0b8e58a1 | 1433 | |
ac27a0ec DK |
1434 | return sb_block; |
1435 | } | |
1436 | ||
b3881f74 | 1437 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1438 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1439 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1440 | |
56c50f11 DM |
1441 | #ifdef CONFIG_QUOTA |
1442 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1443 | { | |
1444 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1445 | char *qname; | |
1446 | ||
1447 | if (sb_any_quota_loaded(sb) && | |
1448 | !sbi->s_qf_names[qtype]) { | |
1449 | ext4_msg(sb, KERN_ERR, | |
1450 | "Cannot change journaled " | |
1451 | "quota options when quota turned on"); | |
1452 | return 0; | |
1453 | } | |
1454 | qname = match_strdup(args); | |
1455 | if (!qname) { | |
1456 | ext4_msg(sb, KERN_ERR, | |
1457 | "Not enough memory for storing quotafile name"); | |
1458 | return 0; | |
1459 | } | |
1460 | if (sbi->s_qf_names[qtype] && | |
1461 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1462 | ext4_msg(sb, KERN_ERR, | |
1463 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1464 | kfree(qname); | |
1465 | return 0; | |
1466 | } | |
1467 | sbi->s_qf_names[qtype] = qname; | |
1468 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1469 | ext4_msg(sb, KERN_ERR, | |
1470 | "quotafile must be on filesystem root"); | |
1471 | kfree(sbi->s_qf_names[qtype]); | |
1472 | sbi->s_qf_names[qtype] = NULL; | |
1473 | return 0; | |
1474 | } | |
fd8c37ec | 1475 | set_opt(sb, QUOTA); |
56c50f11 DM |
1476 | return 1; |
1477 | } | |
1478 | ||
1479 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1480 | { | |
1481 | ||
1482 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1483 | ||
1484 | if (sb_any_quota_loaded(sb) && | |
1485 | sbi->s_qf_names[qtype]) { | |
1486 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1487 | " when quota turned on"); | |
1488 | return 0; | |
1489 | } | |
1490 | /* | |
1491 | * The space will be released later when all options are confirmed | |
1492 | * to be correct | |
1493 | */ | |
1494 | sbi->s_qf_names[qtype] = NULL; | |
1495 | return 1; | |
1496 | } | |
1497 | #endif | |
1498 | ||
2b2d6d01 | 1499 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1500 | unsigned long *journal_devnum, |
b3881f74 | 1501 | unsigned int *journal_ioprio, |
2b2d6d01 | 1502 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1503 | { |
617ba13b | 1504 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1505 | char *p; |
ac27a0ec DK |
1506 | substring_t args[MAX_OPT_ARGS]; |
1507 | int data_opt = 0; | |
1508 | int option; | |
1509 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1510 | int qfmt; |
ac27a0ec DK |
1511 | #endif |
1512 | ||
1513 | if (!options) | |
1514 | return 1; | |
1515 | ||
2b2d6d01 | 1516 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1517 | int token; |
1518 | if (!*p) | |
1519 | continue; | |
1520 | ||
15121c18 ES |
1521 | /* |
1522 | * Initialize args struct so we know whether arg was | |
1523 | * found; some options take optional arguments. | |
1524 | */ | |
7dc57615 | 1525 | args[0].to = args[0].from = NULL; |
ac27a0ec DK |
1526 | token = match_token(p, tokens, args); |
1527 | switch (token) { | |
1528 | case Opt_bsd_df: | |
437ca0fd | 1529 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1530 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1531 | break; |
1532 | case Opt_minix_df: | |
437ca0fd | 1533 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1534 | set_opt(sb, MINIX_DF); |
437ca0fd | 1535 | |
ac27a0ec DK |
1536 | break; |
1537 | case Opt_grpid: | |
437ca0fd | 1538 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1539 | set_opt(sb, GRPID); |
437ca0fd | 1540 | |
ac27a0ec DK |
1541 | break; |
1542 | case Opt_nogrpid: | |
437ca0fd | 1543 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1544 | clear_opt(sb, GRPID); |
437ca0fd | 1545 | |
ac27a0ec DK |
1546 | break; |
1547 | case Opt_resuid: | |
1548 | if (match_int(&args[0], &option)) | |
1549 | return 0; | |
1550 | sbi->s_resuid = option; | |
1551 | break; | |
1552 | case Opt_resgid: | |
1553 | if (match_int(&args[0], &option)) | |
1554 | return 0; | |
1555 | sbi->s_resgid = option; | |
1556 | break; | |
1557 | case Opt_sb: | |
1558 | /* handled by get_sb_block() instead of here */ | |
1559 | /* *sb_block = match_int(&args[0]); */ | |
1560 | break; | |
1561 | case Opt_err_panic: | |
fd8c37ec TT |
1562 | clear_opt(sb, ERRORS_CONT); |
1563 | clear_opt(sb, ERRORS_RO); | |
1564 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1565 | break; |
1566 | case Opt_err_ro: | |
fd8c37ec TT |
1567 | clear_opt(sb, ERRORS_CONT); |
1568 | clear_opt(sb, ERRORS_PANIC); | |
1569 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1570 | break; |
1571 | case Opt_err_cont: | |
fd8c37ec TT |
1572 | clear_opt(sb, ERRORS_RO); |
1573 | clear_opt(sb, ERRORS_PANIC); | |
1574 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1575 | break; |
1576 | case Opt_nouid32: | |
fd8c37ec | 1577 | set_opt(sb, NO_UID32); |
ac27a0ec | 1578 | break; |
ac27a0ec | 1579 | case Opt_debug: |
fd8c37ec | 1580 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1581 | break; |
1582 | case Opt_oldalloc: | |
4113c4ca LC |
1583 | ext4_msg(sb, KERN_WARNING, |
1584 | "Ignoring deprecated oldalloc option"); | |
ac27a0ec DK |
1585 | break; |
1586 | case Opt_orlov: | |
4113c4ca LC |
1587 | ext4_msg(sb, KERN_WARNING, |
1588 | "Ignoring deprecated orlov option"); | |
ac27a0ec | 1589 | break; |
03010a33 | 1590 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1591 | case Opt_user_xattr: |
fd8c37ec | 1592 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1593 | break; |
1594 | case Opt_nouser_xattr: | |
fd8c37ec | 1595 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1596 | break; |
1597 | #else | |
1598 | case Opt_user_xattr: | |
1599 | case Opt_nouser_xattr: | |
b31e1552 | 1600 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1601 | break; |
1602 | #endif | |
03010a33 | 1603 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1604 | case Opt_acl: |
fd8c37ec | 1605 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1606 | break; |
1607 | case Opt_noacl: | |
fd8c37ec | 1608 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1609 | break; |
1610 | #else | |
1611 | case Opt_acl: | |
1612 | case Opt_noacl: | |
b31e1552 | 1613 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1614 | break; |
1615 | #endif | |
ac27a0ec DK |
1616 | case Opt_journal_update: |
1617 | /* @@@ FIXME */ | |
1618 | /* Eventually we will want to be able to create | |
1619 | a journal file here. For now, only allow the | |
1620 | user to specify an existing inode to be the | |
1621 | journal file. */ | |
1622 | if (is_remount) { | |
b31e1552 ES |
1623 | ext4_msg(sb, KERN_ERR, |
1624 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1625 | return 0; |
1626 | } | |
fd8c37ec | 1627 | set_opt(sb, UPDATE_JOURNAL); |
ac27a0ec | 1628 | break; |
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; | |
1796 | case Opt_resize: | |
1797 | if (!is_remount) { | |
b31e1552 ES |
1798 | ext4_msg(sb, KERN_ERR, |
1799 | "resize option only available " | |
1800 | "for remount"); | |
ac27a0ec DK |
1801 | return 0; |
1802 | } | |
1803 | if (match_int(&args[0], &option) != 0) | |
1804 | return 0; | |
1805 | *n_blocks_count = option; | |
1806 | break; | |
1807 | case Opt_nobh: | |
206f7ab4 CH |
1808 | ext4_msg(sb, KERN_WARNING, |
1809 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1810 | break; |
1811 | case Opt_bh: | |
206f7ab4 CH |
1812 | ext4_msg(sb, KERN_WARNING, |
1813 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1814 | break; |
25ec56b5 | 1815 | case Opt_i_version: |
fd8c37ec | 1816 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1817 | sb->s_flags |= MS_I_VERSION; |
1818 | break; | |
dd919b98 | 1819 | case Opt_nodelalloc: |
fd8c37ec | 1820 | clear_opt(sb, DELALLOC); |
56889787 | 1821 | clear_opt2(sb, EXPLICIT_DELALLOC); |
dd919b98 | 1822 | break; |
1449032b | 1823 | case Opt_mblk_io_submit: |
fd8c37ec | 1824 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1825 | break; |
1826 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1827 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1828 | break; |
c9de560d AT |
1829 | case Opt_stripe: |
1830 | if (match_int(&args[0], &option)) | |
1831 | return 0; | |
1832 | if (option < 0) | |
1833 | return 0; | |
1834 | sbi->s_stripe = option; | |
1835 | break; | |
64769240 | 1836 | case Opt_delalloc: |
fd8c37ec | 1837 | set_opt(sb, DELALLOC); |
56889787 | 1838 | set_opt2(sb, EXPLICIT_DELALLOC); |
64769240 | 1839 | break; |
6fd058f7 | 1840 | case Opt_block_validity: |
fd8c37ec | 1841 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1842 | break; |
1843 | case Opt_noblock_validity: | |
fd8c37ec | 1844 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1845 | break; |
240799cd TT |
1846 | case Opt_inode_readahead_blks: |
1847 | if (match_int(&args[0], &option)) | |
1848 | return 0; | |
1849 | if (option < 0 || option > (1 << 30)) | |
1850 | return 0; | |
5dbd571d | 1851 | if (option && !is_power_of_2(option)) { |
b31e1552 ES |
1852 | ext4_msg(sb, KERN_ERR, |
1853 | "EXT4-fs: inode_readahead_blks" | |
1854 | " must be a power of 2"); | |
3197ebdb TT |
1855 | return 0; |
1856 | } | |
240799cd TT |
1857 | sbi->s_inode_readahead_blks = option; |
1858 | break; | |
b3881f74 TT |
1859 | case Opt_journal_ioprio: |
1860 | if (match_int(&args[0], &option)) | |
1861 | return 0; | |
1862 | if (option < 0 || option > 7) | |
1863 | break; | |
1864 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1865 | option); | |
1866 | break; | |
06705bff | 1867 | case Opt_noauto_da_alloc: |
fd8c37ec | 1868 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1869 | break; |
afd4672d | 1870 | case Opt_auto_da_alloc: |
15121c18 ES |
1871 | if (args[0].from) { |
1872 | if (match_int(&args[0], &option)) | |
1873 | return 0; | |
1874 | } else | |
1875 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1876 | if (option) |
fd8c37ec | 1877 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1878 | else |
fd8c37ec | 1879 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1880 | break; |
5328e635 | 1881 | case Opt_discard: |
fd8c37ec | 1882 | set_opt(sb, DISCARD); |
5328e635 ES |
1883 | break; |
1884 | case Opt_nodiscard: | |
fd8c37ec | 1885 | clear_opt(sb, DISCARD); |
5328e635 | 1886 | break; |
744692dc | 1887 | case Opt_dioread_nolock: |
fd8c37ec | 1888 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1889 | break; |
1890 | case Opt_dioread_lock: | |
fd8c37ec | 1891 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1892 | break; |
fc6cb1cd | 1893 | case Opt_init_itable: |
fd8c37ec | 1894 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1895 | if (args[0].from) { |
1896 | if (match_int(&args[0], &option)) | |
1897 | return 0; | |
1898 | } else | |
1899 | option = EXT4_DEF_LI_WAIT_MULT; | |
1900 | if (option < 0) | |
1901 | return 0; | |
1902 | sbi->s_li_wait_mult = option; | |
1903 | break; | |
fc6cb1cd | 1904 | case Opt_noinit_itable: |
fd8c37ec | 1905 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1906 | break; |
ac27a0ec | 1907 | default: |
b31e1552 ES |
1908 | ext4_msg(sb, KERN_ERR, |
1909 | "Unrecognized mount option \"%s\" " | |
1910 | "or missing value", p); | |
ac27a0ec DK |
1911 | return 0; |
1912 | } | |
1913 | } | |
1914 | #ifdef CONFIG_QUOTA | |
1915 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1916 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1917 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1918 | |
482a7425 | 1919 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1920 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1921 | |
56c50f11 | 1922 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1923 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1924 | "format mixing"); | |
ac27a0ec DK |
1925 | return 0; |
1926 | } | |
1927 | ||
1928 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1929 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1930 | "not specified"); | |
ac27a0ec DK |
1931 | return 0; |
1932 | } | |
1933 | } else { | |
1934 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1935 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1936 | "specified with no journaling " |
b31e1552 | 1937 | "enabled"); |
ac27a0ec DK |
1938 | return 0; |
1939 | } | |
1940 | } | |
1941 | #endif | |
1942 | return 1; | |
1943 | } | |
1944 | ||
617ba13b | 1945 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1946 | int read_only) |
1947 | { | |
617ba13b | 1948 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1949 | int res = 0; |
1950 | ||
617ba13b | 1951 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1952 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1953 | "forcing read-only mode"); | |
ac27a0ec DK |
1954 | res = MS_RDONLY; |
1955 | } | |
1956 | if (read_only) | |
281b5995 | 1957 | goto done; |
617ba13b | 1958 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1959 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1960 | "running e2fsck is recommended"); | |
617ba13b | 1961 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1962 | ext4_msg(sb, KERN_WARNING, |
1963 | "warning: mounting fs with errors, " | |
1964 | "running e2fsck is recommended"); | |
ed3ce80a | 1965 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1966 | le16_to_cpu(es->s_mnt_count) >= |
1967 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1968 | ext4_msg(sb, KERN_WARNING, |
1969 | "warning: maximal mount count reached, " | |
1970 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1971 | else if (le32_to_cpu(es->s_checkinterval) && |
1972 | (le32_to_cpu(es->s_lastcheck) + | |
1973 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1974 | ext4_msg(sb, KERN_WARNING, |
1975 | "warning: checktime reached, " | |
1976 | "running e2fsck is recommended"); | |
0b8e58a1 | 1977 | if (!sbi->s_journal) |
0390131b | 1978 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1979 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1980 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1981 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1982 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1983 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1984 | if (sbi->s_journal) |
1985 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1986 | |
e2d67052 | 1987 | ext4_commit_super(sb, 1); |
281b5995 | 1988 | done: |
ac27a0ec | 1989 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1990 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1991 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1992 | sb->s_blocksize, |
1993 | sbi->s_groups_count, | |
617ba13b MC |
1994 | EXT4_BLOCKS_PER_GROUP(sb), |
1995 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1996 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1997 | |
7abc52c2 | 1998 | cleancache_init_fs(sb); |
ac27a0ec DK |
1999 | return res; |
2000 | } | |
2001 | ||
772cb7c8 JS |
2002 | static int ext4_fill_flex_info(struct super_block *sb) |
2003 | { | |
2004 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2005 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
2006 | ext4_group_t flex_group_count; |
2007 | ext4_group_t flex_group; | |
2008 | int groups_per_flex = 0; | |
c5ca7c76 | 2009 | size_t size; |
772cb7c8 JS |
2010 | int i; |
2011 | ||
503358ae TT |
2012 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
2013 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
2014 | ||
2015 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
2016 | sbi->s_log_groups_per_flex = 0; |
2017 | return 1; | |
2018 | } | |
2019 | ||
c62a11fd FB |
2020 | /* We allocate both existing and potentially added groups */ |
2021 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
2022 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
2023 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 | 2024 | size = flex_group_count * sizeof(struct flex_groups); |
9933fc0a | 2025 | sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); |
c5ca7c76 | 2026 | if (sbi->s_flex_groups == NULL) { |
9933fc0a TT |
2027 | ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", |
2028 | flex_group_count); | |
2029 | goto failed; | |
772cb7c8 | 2030 | } |
772cb7c8 | 2031 | |
772cb7c8 | 2032 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2033 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2034 | |
2035 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2036 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2037 | &sbi->s_flex_groups[flex_group].free_inodes); | |
021b65bb | 2038 | atomic_add(ext4_free_group_clusters(sb, gdp), |
24aaa8ef | 2039 | &sbi->s_flex_groups[flex_group].free_clusters); |
7ad9bb65 TT |
2040 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2041 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2042 | } |
2043 | ||
2044 | return 1; | |
2045 | failed: | |
2046 | return 0; | |
2047 | } | |
2048 | ||
717d50e4 AD |
2049 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
2050 | struct ext4_group_desc *gdp) | |
2051 | { | |
2052 | __u16 crc = 0; | |
2053 | ||
2054 | if (sbi->s_es->s_feature_ro_compat & | |
2055 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
2056 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2057 | __le32 le_group = cpu_to_le32(block_group); | |
2058 | ||
2059 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2060 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2061 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2062 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2063 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2064 | if ((sbi->s_es->s_feature_incompat & | |
2065 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2066 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2067 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2068 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2069 | offset); | |
2070 | } | |
2071 | ||
2072 | return cpu_to_le16(crc); | |
2073 | } | |
2074 | ||
2075 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
2076 | struct ext4_group_desc *gdp) | |
2077 | { | |
2078 | if ((sbi->s_es->s_feature_ro_compat & | |
2079 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
2080 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2081 | return 0; | |
2082 | ||
2083 | return 1; | |
2084 | } | |
2085 | ||
ac27a0ec | 2086 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2087 | static int ext4_check_descriptors(struct super_block *sb, |
2088 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2089 | { |
617ba13b MC |
2090 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2091 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2092 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2093 | ext4_fsblk_t block_bitmap; |
2094 | ext4_fsblk_t inode_bitmap; | |
2095 | ext4_fsblk_t inode_table; | |
ce421581 | 2096 | int flexbg_flag = 0; |
bfff6873 | 2097 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2098 | |
ce421581 JS |
2099 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2100 | flexbg_flag = 1; | |
2101 | ||
af5bc92d | 2102 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2103 | |
197cd65a AM |
2104 | for (i = 0; i < sbi->s_groups_count; i++) { |
2105 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2106 | ||
ce421581 | 2107 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2108 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2109 | else |
2110 | last_block = first_block + | |
617ba13b | 2111 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2112 | |
bfff6873 LC |
2113 | if ((grp == sbi->s_groups_count) && |
2114 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2115 | grp = i; | |
2116 | ||
8fadc143 | 2117 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2118 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2119 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2120 | "Block bitmap for group %u not in group " |
b31e1552 | 2121 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2122 | return 0; |
2123 | } | |
8fadc143 | 2124 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2125 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2126 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2127 | "Inode bitmap for group %u not in group " |
b31e1552 | 2128 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2129 | return 0; |
2130 | } | |
8fadc143 | 2131 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2132 | if (inode_table < first_block || |
2b2d6d01 | 2133 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2134 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2135 | "Inode table for group %u not in group " |
b31e1552 | 2136 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2137 | return 0; |
2138 | } | |
955ce5f5 | 2139 | ext4_lock_group(sb, i); |
717d50e4 | 2140 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2141 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2142 | "Checksum for group %u failed (%u!=%u)", | |
2143 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2144 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2145 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2146 | ext4_unlock_group(sb, i); |
8a266467 | 2147 | return 0; |
7ee1ec4c | 2148 | } |
717d50e4 | 2149 | } |
955ce5f5 | 2150 | ext4_unlock_group(sb, i); |
ce421581 JS |
2151 | if (!flexbg_flag) |
2152 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2153 | } |
bfff6873 LC |
2154 | if (NULL != first_not_zeroed) |
2155 | *first_not_zeroed = grp; | |
ac27a0ec | 2156 | |
5dee5437 TT |
2157 | ext4_free_blocks_count_set(sbi->s_es, |
2158 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2159 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2160 | return 1; |
2161 | } | |
2162 | ||
617ba13b | 2163 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2164 | * the superblock) which were deleted from all directories, but held open by |
2165 | * a process at the time of a crash. We walk the list and try to delete these | |
2166 | * inodes at recovery time (only with a read-write filesystem). | |
2167 | * | |
2168 | * In order to keep the orphan inode chain consistent during traversal (in | |
2169 | * case of crash during recovery), we link each inode into the superblock | |
2170 | * orphan list_head and handle it the same way as an inode deletion during | |
2171 | * normal operation (which journals the operations for us). | |
2172 | * | |
2173 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2174 | * accidentally point at an in-use or already deleted inode. The worst that | |
2175 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2176 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2177 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2178 | * inode cleanup for us, so we can safely abort without any further action. | |
2179 | */ | |
2b2d6d01 TT |
2180 | static void ext4_orphan_cleanup(struct super_block *sb, |
2181 | struct ext4_super_block *es) | |
ac27a0ec DK |
2182 | { |
2183 | unsigned int s_flags = sb->s_flags; | |
2184 | int nr_orphans = 0, nr_truncates = 0; | |
2185 | #ifdef CONFIG_QUOTA | |
2186 | int i; | |
2187 | #endif | |
2188 | if (!es->s_last_orphan) { | |
2189 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2190 | return; | |
2191 | } | |
2192 | ||
a8f48a95 | 2193 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2194 | ext4_msg(sb, KERN_ERR, "write access " |
2195 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2196 | return; |
2197 | } | |
2198 | ||
d39195c3 AG |
2199 | /* Check if feature set would not allow a r/w mount */ |
2200 | if (!ext4_feature_set_ok(sb, 0)) { | |
2201 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2202 | "unknown ROCOMPAT features"); | |
2203 | return; | |
2204 | } | |
2205 | ||
617ba13b | 2206 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2207 | if (es->s_last_orphan) |
2208 | jbd_debug(1, "Errors on filesystem, " | |
2209 | "clearing orphan list.\n"); | |
2210 | es->s_last_orphan = 0; | |
2211 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2212 | return; | |
2213 | } | |
2214 | ||
2215 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2216 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2217 | sb->s_flags &= ~MS_RDONLY; |
2218 | } | |
2219 | #ifdef CONFIG_QUOTA | |
2220 | /* Needed for iput() to work correctly and not trash data */ | |
2221 | sb->s_flags |= MS_ACTIVE; | |
2222 | /* Turn on quotas so that they are updated correctly */ | |
2223 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2224 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2225 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2226 | if (ret < 0) |
b31e1552 ES |
2227 | ext4_msg(sb, KERN_ERR, |
2228 | "Cannot turn on journaled " | |
2229 | "quota: error %d", ret); | |
ac27a0ec DK |
2230 | } |
2231 | } | |
2232 | #endif | |
2233 | ||
2234 | while (es->s_last_orphan) { | |
2235 | struct inode *inode; | |
2236 | ||
97bd42b9 JB |
2237 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2238 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2239 | es->s_last_orphan = 0; |
2240 | break; | |
2241 | } | |
2242 | ||
617ba13b | 2243 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2244 | dquot_initialize(inode); |
ac27a0ec | 2245 | if (inode->i_nlink) { |
b31e1552 ES |
2246 | ext4_msg(sb, KERN_DEBUG, |
2247 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2248 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2249 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2250 | inode->i_ino, inode->i_size); |
617ba13b | 2251 | ext4_truncate(inode); |
ac27a0ec DK |
2252 | nr_truncates++; |
2253 | } else { | |
b31e1552 ES |
2254 | ext4_msg(sb, KERN_DEBUG, |
2255 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2256 | __func__, inode->i_ino); |
ac27a0ec DK |
2257 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2258 | inode->i_ino); | |
2259 | nr_orphans++; | |
2260 | } | |
2261 | iput(inode); /* The delete magic happens here! */ | |
2262 | } | |
2263 | ||
2b2d6d01 | 2264 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2265 | |
2266 | if (nr_orphans) | |
b31e1552 ES |
2267 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2268 | PLURAL(nr_orphans)); | |
ac27a0ec | 2269 | if (nr_truncates) |
b31e1552 ES |
2270 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2271 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2272 | #ifdef CONFIG_QUOTA |
2273 | /* Turn quotas off */ | |
2274 | for (i = 0; i < MAXQUOTAS; i++) { | |
2275 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2276 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2277 | } |
2278 | #endif | |
2279 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2280 | } | |
0b8e58a1 | 2281 | |
cd2291a4 ES |
2282 | /* |
2283 | * Maximal extent format file size. | |
2284 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2285 | * extent format containers, within a sector_t, and within i_blocks | |
2286 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2287 | * so that won't be a limiting factor. | |
2288 | * | |
f17722f9 LC |
2289 | * However there is other limiting factor. We do store extents in the form |
2290 | * of starting block and length, hence the resulting length of the extent | |
2291 | * covering maximum file size must fit into on-disk format containers as | |
2292 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2293 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2294 | * | |
cd2291a4 ES |
2295 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2296 | */ | |
f287a1a5 | 2297 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2298 | { |
2299 | loff_t res; | |
2300 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2301 | ||
2302 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2303 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2304 | /* |
90c699a9 | 2305 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2306 | * i_block represent total blocks in 512 bytes |
2307 | * 32 == size of vfs inode i_blocks * 8 | |
2308 | */ | |
2309 | upper_limit = (1LL << 32) - 1; | |
2310 | ||
2311 | /* total blocks in file system block size */ | |
2312 | upper_limit >>= (blkbits - 9); | |
2313 | upper_limit <<= blkbits; | |
2314 | } | |
2315 | ||
f17722f9 LC |
2316 | /* |
2317 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2318 | * by one fs block, so ee_len can cover the extent of maximum file | |
2319 | * size | |
2320 | */ | |
2321 | res = (1LL << 32) - 1; | |
cd2291a4 | 2322 | res <<= blkbits; |
cd2291a4 ES |
2323 | |
2324 | /* Sanity check against vm- & vfs- imposed limits */ | |
2325 | if (res > upper_limit) | |
2326 | res = upper_limit; | |
2327 | ||
2328 | return res; | |
2329 | } | |
ac27a0ec | 2330 | |
ac27a0ec | 2331 | /* |
cd2291a4 | 2332 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2333 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2334 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2335 | */ |
f287a1a5 | 2336 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2337 | { |
617ba13b | 2338 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2339 | int meta_blocks; |
2340 | loff_t upper_limit; | |
0b8e58a1 AD |
2341 | /* This is calculated to be the largest file size for a dense, block |
2342 | * mapped file such that the file's total number of 512-byte sectors, | |
2343 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2344 | * | |
2345 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2346 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2347 | */ |
2348 | ||
f287a1a5 | 2349 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2350 | /* |
90c699a9 | 2351 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2352 | * the inode i_block field represents total file blocks in |
2353 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2354 | */ |
2355 | upper_limit = (1LL << 32) - 1; | |
2356 | ||
2357 | /* total blocks in file system block size */ | |
2358 | upper_limit >>= (bits - 9); | |
2359 | ||
2360 | } else { | |
8180a562 AK |
2361 | /* |
2362 | * We use 48 bit ext4_inode i_blocks | |
2363 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2364 | * represent total number of blocks in | |
2365 | * file system block size | |
2366 | */ | |
0fc1b451 AK |
2367 | upper_limit = (1LL << 48) - 1; |
2368 | ||
0fc1b451 AK |
2369 | } |
2370 | ||
2371 | /* indirect blocks */ | |
2372 | meta_blocks = 1; | |
2373 | /* double indirect blocks */ | |
2374 | meta_blocks += 1 + (1LL << (bits-2)); | |
2375 | /* tripple indirect blocks */ | |
2376 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2377 | ||
2378 | upper_limit -= meta_blocks; | |
2379 | upper_limit <<= bits; | |
ac27a0ec DK |
2380 | |
2381 | res += 1LL << (bits-2); | |
2382 | res += 1LL << (2*(bits-2)); | |
2383 | res += 1LL << (3*(bits-2)); | |
2384 | res <<= bits; | |
2385 | if (res > upper_limit) | |
2386 | res = upper_limit; | |
0fc1b451 AK |
2387 | |
2388 | if (res > MAX_LFS_FILESIZE) | |
2389 | res = MAX_LFS_FILESIZE; | |
2390 | ||
ac27a0ec DK |
2391 | return res; |
2392 | } | |
2393 | ||
617ba13b | 2394 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2395 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2396 | { |
617ba13b | 2397 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2398 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2399 | int has_super = 0; |
2400 | ||
2401 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2402 | ||
617ba13b | 2403 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2404 | nr < first_meta_bg) |
70bbb3e0 | 2405 | return logical_sb_block + nr + 1; |
ac27a0ec | 2406 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2407 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2408 | has_super = 1; |
0b8e58a1 | 2409 | |
617ba13b | 2410 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2411 | } |
2412 | ||
c9de560d AT |
2413 | /** |
2414 | * ext4_get_stripe_size: Get the stripe size. | |
2415 | * @sbi: In memory super block info | |
2416 | * | |
2417 | * If we have specified it via mount option, then | |
2418 | * use the mount option value. If the value specified at mount time is | |
2419 | * greater than the blocks per group use the super block value. | |
2420 | * If the super block value is greater than blocks per group return 0. | |
2421 | * Allocator needs it be less than blocks per group. | |
2422 | * | |
2423 | */ | |
2424 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2425 | { | |
2426 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2427 | unsigned long stripe_width = | |
2428 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2429 | int ret; |
c9de560d AT |
2430 | |
2431 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2432 | ret = sbi->s_stripe; |
2433 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2434 | ret = stripe_width; | |
2435 | else if (stride <= sbi->s_blocks_per_group) | |
2436 | ret = stride; | |
2437 | else | |
2438 | ret = 0; | |
c9de560d | 2439 | |
3eb08658 DE |
2440 | /* |
2441 | * If the stripe width is 1, this makes no sense and | |
2442 | * we set it to 0 to turn off stripe handling code. | |
2443 | */ | |
2444 | if (ret <= 1) | |
2445 | ret = 0; | |
c9de560d | 2446 | |
3eb08658 | 2447 | return ret; |
c9de560d | 2448 | } |
ac27a0ec | 2449 | |
3197ebdb TT |
2450 | /* sysfs supprt */ |
2451 | ||
2452 | struct ext4_attr { | |
2453 | struct attribute attr; | |
2454 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2455 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2456 | const char *, size_t); |
2457 | int offset; | |
2458 | }; | |
2459 | ||
2460 | static int parse_strtoul(const char *buf, | |
2461 | unsigned long max, unsigned long *value) | |
2462 | { | |
2463 | char *endp; | |
2464 | ||
e7d2860b AGR |
2465 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2466 | endp = skip_spaces(endp); | |
3197ebdb TT |
2467 | if (*endp || *value > max) |
2468 | return -EINVAL; | |
2469 | ||
2470 | return 0; | |
2471 | } | |
2472 | ||
2473 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2474 | struct ext4_sb_info *sbi, | |
2475 | char *buf) | |
2476 | { | |
2477 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2478 | (s64) EXT4_C2B(sbi, |
2479 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2480 | } |
2481 | ||
2482 | static ssize_t session_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 TT |
2489 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2490 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2491 | sbi->s_sectors_written_start) >> 1); | |
2492 | } | |
2493 | ||
2494 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2495 | struct ext4_sb_info *sbi, char *buf) | |
2496 | { | |
2497 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2498 | ||
f613dfcb TT |
2499 | if (!sb->s_bdev->bd_part) |
2500 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2501 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2502 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2503 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2504 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2505 | } |
2506 | ||
77f4135f VH |
2507 | static ssize_t extent_cache_hits_show(struct ext4_attr *a, |
2508 | struct ext4_sb_info *sbi, char *buf) | |
2509 | { | |
2510 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); | |
2511 | } | |
2512 | ||
2513 | static ssize_t extent_cache_misses_show(struct ext4_attr *a, | |
2514 | struct ext4_sb_info *sbi, char *buf) | |
2515 | { | |
2516 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); | |
2517 | } | |
2518 | ||
3197ebdb TT |
2519 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
2520 | struct ext4_sb_info *sbi, | |
2521 | const char *buf, size_t count) | |
2522 | { | |
2523 | unsigned long t; | |
2524 | ||
2525 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2526 | return -EINVAL; | |
2527 | ||
5dbd571d | 2528 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2529 | return -EINVAL; |
2530 | ||
2531 | sbi->s_inode_readahead_blks = t; | |
2532 | return count; | |
2533 | } | |
2534 | ||
2535 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2536 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2537 | { |
2538 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2539 | ||
2540 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2541 | } | |
2542 | ||
2543 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2544 | struct ext4_sb_info *sbi, | |
2545 | const char *buf, size_t count) | |
2546 | { | |
2547 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2548 | unsigned long t; | |
2549 | ||
2550 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2551 | return -EINVAL; | |
2552 | *ui = t; | |
2553 | return count; | |
2554 | } | |
2555 | ||
2556 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2557 | static struct ext4_attr ext4_attr_##_name = { \ | |
2558 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2559 | .show = _show, \ | |
2560 | .store = _store, \ | |
2561 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2562 | } | |
2563 | #define EXT4_ATTR(name, mode, show, store) \ | |
2564 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2565 | ||
857ac889 | 2566 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2567 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2568 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2569 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2570 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2571 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2572 | ||
2573 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2574 | EXT4_RO_ATTR(session_write_kbytes); | |
2575 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
77f4135f VH |
2576 | EXT4_RO_ATTR(extent_cache_hits); |
2577 | EXT4_RO_ATTR(extent_cache_misses); | |
3197ebdb TT |
2578 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2579 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2580 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2581 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2582 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2583 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2584 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2585 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2586 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2587 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2588 | |
2589 | static struct attribute *ext4_attrs[] = { | |
2590 | ATTR_LIST(delayed_allocation_blocks), | |
2591 | ATTR_LIST(session_write_kbytes), | |
2592 | ATTR_LIST(lifetime_write_kbytes), | |
77f4135f VH |
2593 | ATTR_LIST(extent_cache_hits), |
2594 | ATTR_LIST(extent_cache_misses), | |
3197ebdb | 2595 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2596 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2597 | ATTR_LIST(mb_stats), |
2598 | ATTR_LIST(mb_max_to_scan), | |
2599 | ATTR_LIST(mb_min_to_scan), | |
2600 | ATTR_LIST(mb_order2_req), | |
2601 | ATTR_LIST(mb_stream_req), | |
2602 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2603 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2604 | NULL, |
2605 | }; | |
2606 | ||
857ac889 LC |
2607 | /* Features this copy of ext4 supports */ |
2608 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2609 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2610 | |
2611 | static struct attribute *ext4_feat_attrs[] = { | |
2612 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2613 | ATTR_LIST(batched_discard), |
857ac889 LC |
2614 | NULL, |
2615 | }; | |
2616 | ||
3197ebdb TT |
2617 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2618 | struct attribute *attr, char *buf) | |
2619 | { | |
2620 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2621 | s_kobj); | |
2622 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2623 | ||
2624 | return a->show ? a->show(a, sbi, buf) : 0; | |
2625 | } | |
2626 | ||
2627 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2628 | struct attribute *attr, | |
2629 | const char *buf, size_t len) | |
2630 | { | |
2631 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2632 | s_kobj); | |
2633 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2634 | ||
2635 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2636 | } | |
2637 | ||
2638 | static void ext4_sb_release(struct kobject *kobj) | |
2639 | { | |
2640 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2641 | s_kobj); | |
2642 | complete(&sbi->s_kobj_unregister); | |
2643 | } | |
2644 | ||
52cf25d0 | 2645 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2646 | .show = ext4_attr_show, |
2647 | .store = ext4_attr_store, | |
2648 | }; | |
2649 | ||
2650 | static struct kobj_type ext4_ktype = { | |
2651 | .default_attrs = ext4_attrs, | |
2652 | .sysfs_ops = &ext4_attr_ops, | |
2653 | .release = ext4_sb_release, | |
2654 | }; | |
2655 | ||
857ac889 LC |
2656 | static void ext4_feat_release(struct kobject *kobj) |
2657 | { | |
2658 | complete(&ext4_feat->f_kobj_unregister); | |
2659 | } | |
2660 | ||
2661 | static struct kobj_type ext4_feat_ktype = { | |
2662 | .default_attrs = ext4_feat_attrs, | |
2663 | .sysfs_ops = &ext4_attr_ops, | |
2664 | .release = ext4_feat_release, | |
2665 | }; | |
2666 | ||
a13fb1a4 ES |
2667 | /* |
2668 | * Check whether this filesystem can be mounted based on | |
2669 | * the features present and the RDONLY/RDWR mount requested. | |
2670 | * Returns 1 if this filesystem can be mounted as requested, | |
2671 | * 0 if it cannot be. | |
2672 | */ | |
2673 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2674 | { | |
2675 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2676 | ext4_msg(sb, KERN_ERR, | |
2677 | "Couldn't mount because of " | |
2678 | "unsupported optional features (%x)", | |
2679 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2680 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2681 | return 0; | |
2682 | } | |
2683 | ||
2684 | if (readonly) | |
2685 | return 1; | |
2686 | ||
2687 | /* Check that feature set is OK for a read-write mount */ | |
2688 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2689 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2690 | "unsupported optional features (%x)", | |
2691 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2692 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2693 | return 0; | |
2694 | } | |
2695 | /* | |
2696 | * Large file size enabled file system can only be mounted | |
2697 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2698 | */ | |
2699 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2700 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2701 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2702 | "cannot be mounted RDWR without " | |
2703 | "CONFIG_LBDAF"); | |
2704 | return 0; | |
2705 | } | |
2706 | } | |
bab08ab9 TT |
2707 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2708 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2709 | ext4_msg(sb, KERN_ERR, | |
2710 | "Can't support bigalloc feature without " | |
2711 | "extents feature\n"); | |
2712 | return 0; | |
2713 | } | |
a13fb1a4 ES |
2714 | return 1; |
2715 | } | |
2716 | ||
66e61a9e TT |
2717 | /* |
2718 | * This function is called once a day if we have errors logged | |
2719 | * on the file system | |
2720 | */ | |
2721 | static void print_daily_error_info(unsigned long arg) | |
2722 | { | |
2723 | struct super_block *sb = (struct super_block *) arg; | |
2724 | struct ext4_sb_info *sbi; | |
2725 | struct ext4_super_block *es; | |
2726 | ||
2727 | sbi = EXT4_SB(sb); | |
2728 | es = sbi->s_es; | |
2729 | ||
2730 | if (es->s_error_count) | |
2731 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2732 | le32_to_cpu(es->s_error_count)); | |
2733 | if (es->s_first_error_time) { | |
2734 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2735 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2736 | (int) sizeof(es->s_first_error_func), | |
2737 | es->s_first_error_func, | |
2738 | le32_to_cpu(es->s_first_error_line)); | |
2739 | if (es->s_first_error_ino) | |
2740 | printk(": inode %u", | |
2741 | le32_to_cpu(es->s_first_error_ino)); | |
2742 | if (es->s_first_error_block) | |
2743 | printk(": block %llu", (unsigned long long) | |
2744 | le64_to_cpu(es->s_first_error_block)); | |
2745 | printk("\n"); | |
2746 | } | |
2747 | if (es->s_last_error_time) { | |
2748 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2749 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2750 | (int) sizeof(es->s_last_error_func), | |
2751 | es->s_last_error_func, | |
2752 | le32_to_cpu(es->s_last_error_line)); | |
2753 | if (es->s_last_error_ino) | |
2754 | printk(": inode %u", | |
2755 | le32_to_cpu(es->s_last_error_ino)); | |
2756 | if (es->s_last_error_block) | |
2757 | printk(": block %llu", (unsigned long long) | |
2758 | le64_to_cpu(es->s_last_error_block)); | |
2759 | printk("\n"); | |
2760 | } | |
2761 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2762 | } | |
2763 | ||
bfff6873 LC |
2764 | /* Find next suitable group and run ext4_init_inode_table */ |
2765 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2766 | { | |
2767 | struct ext4_group_desc *gdp = NULL; | |
2768 | ext4_group_t group, ngroups; | |
2769 | struct super_block *sb; | |
2770 | unsigned long timeout = 0; | |
2771 | int ret = 0; | |
2772 | ||
2773 | sb = elr->lr_super; | |
2774 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2775 | ||
2776 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2777 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2778 | if (!gdp) { | |
2779 | ret = 1; | |
2780 | break; | |
2781 | } | |
2782 | ||
2783 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2784 | break; | |
2785 | } | |
2786 | ||
2787 | if (group == ngroups) | |
2788 | ret = 1; | |
2789 | ||
2790 | if (!ret) { | |
2791 | timeout = jiffies; | |
2792 | ret = ext4_init_inode_table(sb, group, | |
2793 | elr->lr_timeout ? 0 : 1); | |
2794 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2795 | timeout = (jiffies - timeout) * |
2796 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2797 | elr->lr_timeout = timeout; |
2798 | } | |
2799 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2800 | elr->lr_next_group = group + 1; | |
2801 | } | |
2802 | ||
2803 | return ret; | |
2804 | } | |
2805 | ||
2806 | /* | |
2807 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2808 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2809 | */ |
2810 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2811 | { | |
2812 | struct ext4_sb_info *sbi; | |
2813 | ||
2814 | if (!elr) | |
2815 | return; | |
2816 | ||
2817 | sbi = elr->lr_sbi; | |
2818 | ||
2819 | list_del(&elr->lr_request); | |
2820 | sbi->s_li_request = NULL; | |
2821 | kfree(elr); | |
2822 | } | |
2823 | ||
2824 | static void ext4_unregister_li_request(struct super_block *sb) | |
2825 | { | |
1bb933fb LC |
2826 | mutex_lock(&ext4_li_mtx); |
2827 | if (!ext4_li_info) { | |
2828 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2829 | return; |
1bb933fb | 2830 | } |
bfff6873 LC |
2831 | |
2832 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2833 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2834 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2835 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2836 | } |
2837 | ||
8f1f7453 ES |
2838 | static struct task_struct *ext4_lazyinit_task; |
2839 | ||
bfff6873 LC |
2840 | /* |
2841 | * This is the function where ext4lazyinit thread lives. It walks | |
2842 | * through the request list searching for next scheduled filesystem. | |
2843 | * When such a fs is found, run the lazy initialization request | |
2844 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2845 | * function. Based on that time we compute next schedule time of | |
2846 | * the request. When walking through the list is complete, compute | |
2847 | * next waking time and put itself into sleep. | |
2848 | */ | |
2849 | static int ext4_lazyinit_thread(void *arg) | |
2850 | { | |
2851 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2852 | struct list_head *pos, *n; | |
2853 | struct ext4_li_request *elr; | |
4ed5c033 | 2854 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2855 | |
2856 | BUG_ON(NULL == eli); | |
2857 | ||
bfff6873 LC |
2858 | cont_thread: |
2859 | while (true) { | |
2860 | next_wakeup = MAX_JIFFY_OFFSET; | |
2861 | ||
2862 | mutex_lock(&eli->li_list_mtx); | |
2863 | if (list_empty(&eli->li_request_list)) { | |
2864 | mutex_unlock(&eli->li_list_mtx); | |
2865 | goto exit_thread; | |
2866 | } | |
2867 | ||
2868 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2869 | elr = list_entry(pos, struct ext4_li_request, | |
2870 | lr_request); | |
2871 | ||
b2c78cd0 TT |
2872 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2873 | if (ext4_run_li_request(elr) != 0) { | |
2874 | /* error, remove the lazy_init job */ | |
2875 | ext4_remove_li_request(elr); | |
2876 | continue; | |
2877 | } | |
bfff6873 LC |
2878 | } |
2879 | ||
2880 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2881 | next_wakeup = elr->lr_next_sched; | |
2882 | } | |
2883 | mutex_unlock(&eli->li_list_mtx); | |
2884 | ||
2885 | if (freezing(current)) | |
2886 | refrigerator(); | |
2887 | ||
4ed5c033 LC |
2888 | cur = jiffies; |
2889 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2890 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2891 | cond_resched(); |
2892 | continue; | |
2893 | } | |
2894 | ||
4ed5c033 LC |
2895 | schedule_timeout_interruptible(next_wakeup - cur); |
2896 | ||
8f1f7453 ES |
2897 | if (kthread_should_stop()) { |
2898 | ext4_clear_request_list(); | |
2899 | goto exit_thread; | |
2900 | } | |
bfff6873 LC |
2901 | } |
2902 | ||
2903 | exit_thread: | |
2904 | /* | |
2905 | * It looks like the request list is empty, but we need | |
2906 | * to check it under the li_list_mtx lock, to prevent any | |
2907 | * additions into it, and of course we should lock ext4_li_mtx | |
2908 | * to atomically free the list and ext4_li_info, because at | |
2909 | * this point another ext4 filesystem could be registering | |
2910 | * new one. | |
2911 | */ | |
2912 | mutex_lock(&ext4_li_mtx); | |
2913 | mutex_lock(&eli->li_list_mtx); | |
2914 | if (!list_empty(&eli->li_request_list)) { | |
2915 | mutex_unlock(&eli->li_list_mtx); | |
2916 | mutex_unlock(&ext4_li_mtx); | |
2917 | goto cont_thread; | |
2918 | } | |
2919 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2920 | kfree(ext4_li_info); |
2921 | ext4_li_info = NULL; | |
2922 | mutex_unlock(&ext4_li_mtx); | |
2923 | ||
2924 | return 0; | |
2925 | } | |
2926 | ||
2927 | static void ext4_clear_request_list(void) | |
2928 | { | |
2929 | struct list_head *pos, *n; | |
2930 | struct ext4_li_request *elr; | |
2931 | ||
2932 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2933 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2934 | elr = list_entry(pos, struct ext4_li_request, | |
2935 | lr_request); | |
2936 | ext4_remove_li_request(elr); | |
2937 | } | |
2938 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2939 | } | |
2940 | ||
2941 | static int ext4_run_lazyinit_thread(void) | |
2942 | { | |
8f1f7453 ES |
2943 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2944 | ext4_li_info, "ext4lazyinit"); | |
2945 | if (IS_ERR(ext4_lazyinit_task)) { | |
2946 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2947 | ext4_clear_request_list(); |
bfff6873 LC |
2948 | kfree(ext4_li_info); |
2949 | ext4_li_info = NULL; | |
2950 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2951 | "initialization thread\n", | |
2952 | err); | |
2953 | return err; | |
2954 | } | |
2955 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2956 | return 0; |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * Check whether it make sense to run itable init. thread or not. | |
2961 | * If there is at least one uninitialized inode table, return | |
2962 | * corresponding group number, else the loop goes through all | |
2963 | * groups and return total number of groups. | |
2964 | */ | |
2965 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2966 | { | |
2967 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2968 | struct ext4_group_desc *gdp = NULL; | |
2969 | ||
2970 | for (group = 0; group < ngroups; group++) { | |
2971 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2972 | if (!gdp) | |
2973 | continue; | |
2974 | ||
2975 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2976 | break; | |
2977 | } | |
2978 | ||
2979 | return group; | |
2980 | } | |
2981 | ||
2982 | static int ext4_li_info_new(void) | |
2983 | { | |
2984 | struct ext4_lazy_init *eli = NULL; | |
2985 | ||
2986 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2987 | if (!eli) | |
2988 | return -ENOMEM; | |
2989 | ||
bfff6873 LC |
2990 | INIT_LIST_HEAD(&eli->li_request_list); |
2991 | mutex_init(&eli->li_list_mtx); | |
2992 | ||
bfff6873 LC |
2993 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2994 | ||
2995 | ext4_li_info = eli; | |
2996 | ||
2997 | return 0; | |
2998 | } | |
2999 | ||
3000 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3001 | ext4_group_t start) | |
3002 | { | |
3003 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3004 | struct ext4_li_request *elr; | |
3005 | unsigned long rnd; | |
3006 | ||
3007 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3008 | if (!elr) | |
3009 | return NULL; | |
3010 | ||
3011 | elr->lr_super = sb; | |
3012 | elr->lr_sbi = sbi; | |
3013 | elr->lr_next_group = start; | |
3014 | ||
3015 | /* | |
3016 | * Randomize first schedule time of the request to | |
3017 | * spread the inode table initialization requests | |
3018 | * better. | |
3019 | */ | |
3020 | get_random_bytes(&rnd, sizeof(rnd)); | |
3021 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
3022 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
3023 | ||
3024 | return elr; | |
3025 | } | |
3026 | ||
3027 | static int ext4_register_li_request(struct super_block *sb, | |
3028 | ext4_group_t first_not_zeroed) | |
3029 | { | |
3030 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3031 | struct ext4_li_request *elr; | |
3032 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 3033 | int ret = 0; |
bfff6873 | 3034 | |
51ce6511 LC |
3035 | if (sbi->s_li_request != NULL) { |
3036 | /* | |
3037 | * Reset timeout so it can be computed again, because | |
3038 | * s_li_wait_mult might have changed. | |
3039 | */ | |
3040 | sbi->s_li_request->lr_timeout = 0; | |
beed5ecb | 3041 | return 0; |
51ce6511 | 3042 | } |
bfff6873 LC |
3043 | |
3044 | if (first_not_zeroed == ngroups || | |
3045 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3046 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 3047 | return 0; |
bfff6873 LC |
3048 | |
3049 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
3050 | if (!elr) |
3051 | return -ENOMEM; | |
bfff6873 LC |
3052 | |
3053 | mutex_lock(&ext4_li_mtx); | |
3054 | ||
3055 | if (NULL == ext4_li_info) { | |
3056 | ret = ext4_li_info_new(); | |
3057 | if (ret) | |
3058 | goto out; | |
3059 | } | |
3060 | ||
3061 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3062 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3063 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3064 | ||
3065 | sbi->s_li_request = elr; | |
46e4690b TM |
3066 | /* |
3067 | * set elr to NULL here since it has been inserted to | |
3068 | * the request_list and the removal and free of it is | |
3069 | * handled by ext4_clear_request_list from now on. | |
3070 | */ | |
3071 | elr = NULL; | |
bfff6873 LC |
3072 | |
3073 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3074 | ret = ext4_run_lazyinit_thread(); | |
3075 | if (ret) | |
3076 | goto out; | |
3077 | } | |
bfff6873 | 3078 | out: |
beed5ecb NK |
3079 | mutex_unlock(&ext4_li_mtx); |
3080 | if (ret) | |
bfff6873 | 3081 | kfree(elr); |
bfff6873 LC |
3082 | return ret; |
3083 | } | |
3084 | ||
3085 | /* | |
3086 | * We do not need to lock anything since this is called on | |
3087 | * module unload. | |
3088 | */ | |
3089 | static void ext4_destroy_lazyinit_thread(void) | |
3090 | { | |
3091 | /* | |
3092 | * If thread exited earlier | |
3093 | * there's nothing to be done. | |
3094 | */ | |
8f1f7453 | 3095 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3096 | return; |
3097 | ||
8f1f7453 | 3098 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3099 | } |
3100 | ||
2b2d6d01 | 3101 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3102 | { |
d4c402d9 | 3103 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3104 | struct buffer_head *bh; |
617ba13b MC |
3105 | struct ext4_super_block *es = NULL; |
3106 | struct ext4_sb_info *sbi; | |
3107 | ext4_fsblk_t block; | |
3108 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3109 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3110 | unsigned long offset = 0; |
ac27a0ec DK |
3111 | unsigned long journal_devnum = 0; |
3112 | unsigned long def_mount_opts; | |
3113 | struct inode *root; | |
9f6200bb | 3114 | char *cp; |
0390131b | 3115 | const char *descr; |
dcc7dae3 | 3116 | int ret = -ENOMEM; |
281b5995 | 3117 | int blocksize, clustersize; |
4ec11028 TT |
3118 | unsigned int db_count; |
3119 | unsigned int i; | |
281b5995 | 3120 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3121 | __u64 blocks_count; |
833f4077 | 3122 | int err; |
b3881f74 | 3123 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3124 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3125 | |
3126 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3127 | if (!sbi) | |
dcc7dae3 | 3128 | goto out_free_orig; |
705895b6 PE |
3129 | |
3130 | sbi->s_blockgroup_lock = | |
3131 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3132 | if (!sbi->s_blockgroup_lock) { | |
3133 | kfree(sbi); | |
dcc7dae3 | 3134 | goto out_free_orig; |
705895b6 | 3135 | } |
ac27a0ec DK |
3136 | sb->s_fs_info = sbi; |
3137 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3138 | sbi->s_resuid = EXT4_DEF_RESUID; |
3139 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3140 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3141 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3142 | if (sb->s_bdev->bd_part) |
3143 | sbi->s_sectors_written_start = | |
3144 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3145 | |
9f6200bb TT |
3146 | /* Cleanup superblock name */ |
3147 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3148 | *cp = '!'; | |
3149 | ||
dcc7dae3 | 3150 | ret = -EINVAL; |
617ba13b | 3151 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3152 | if (!blocksize) { |
b31e1552 | 3153 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3154 | goto out_fail; |
3155 | } | |
3156 | ||
3157 | /* | |
617ba13b | 3158 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3159 | * block sizes. We need to calculate the offset from buffer start. |
3160 | */ | |
617ba13b | 3161 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3162 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3163 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3164 | } else { |
70bbb3e0 | 3165 | logical_sb_block = sb_block; |
ac27a0ec DK |
3166 | } |
3167 | ||
70bbb3e0 | 3168 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3169 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3170 | goto out_fail; |
3171 | } | |
3172 | /* | |
3173 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3174 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3175 | */ |
617ba13b | 3176 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3177 | sbi->s_es = es; |
3178 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3179 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3180 | goto cantfind_ext4; | |
afc32f7e | 3181 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3182 | |
3183 | /* Set defaults before we parse the mount options */ | |
3184 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3185 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3186 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3187 | set_opt(sb, DEBUG); |
437ca0fd DM |
3188 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3189 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3190 | "2.6.38"); | |
fd8c37ec | 3191 | set_opt(sb, GRPID); |
437ca0fd | 3192 | } |
617ba13b | 3193 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3194 | set_opt(sb, NO_UID32); |
ea663336 | 3195 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3196 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3197 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3198 | #endif |
03010a33 | 3199 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3200 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3201 | #endif |
6fd7a467 | 3202 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3203 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3204 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3205 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3206 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3207 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3208 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3209 | |
3210 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3211 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3212 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3213 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3214 | else |
fd8c37ec | 3215 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3216 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3217 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3218 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3219 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3220 | |
3221 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3222 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3223 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3224 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3225 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3226 | |
8b67f04a | 3227 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3228 | set_opt(sb, BARRIER); |
ac27a0ec | 3229 | |
dd919b98 AK |
3230 | /* |
3231 | * enable delayed allocation by default | |
3232 | * Use -o nodelalloc to turn it off | |
3233 | */ | |
8b67f04a TT |
3234 | if (!IS_EXT3_SB(sb) && |
3235 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3236 | set_opt(sb, DELALLOC); |
dd919b98 | 3237 | |
51ce6511 LC |
3238 | /* |
3239 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3240 | * no mount option specified. | |
3241 | */ | |
3242 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3243 | ||
8b67f04a TT |
3244 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3245 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3246 | ext4_msg(sb, KERN_WARNING, | |
3247 | "failed to parse options in superblock: %s", | |
3248 | sbi->s_es->s_mount_opts); | |
3249 | } | |
b3881f74 TT |
3250 | if (!parse_options((char *) data, sb, &journal_devnum, |
3251 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3252 | goto failed_mount; |
3253 | ||
56889787 TT |
3254 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3255 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3256 | "with data=journal disables delayed " | |
3257 | "allocation and O_DIRECT support!\n"); | |
3258 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3259 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3260 | "both data=journal and delalloc"); | |
3261 | goto failed_mount; | |
3262 | } | |
3263 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3264 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3265 | "both data=journal and delalloc"); | |
3266 | goto failed_mount; | |
3267 | } | |
3268 | if (test_opt(sb, DELALLOC)) | |
3269 | clear_opt(sb, DELALLOC); | |
3270 | } | |
3271 | ||
3272 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
3273 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3274 | if (blocksize < PAGE_SIZE) { | |
3275 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3276 | "dioread_nolock if block size != PAGE_SIZE"); | |
3277 | goto failed_mount; | |
3278 | } | |
3279 | } | |
3280 | ||
ac27a0ec | 3281 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3282 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3283 | |
617ba13b MC |
3284 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3285 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3286 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3287 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3288 | ext4_msg(sb, KERN_WARNING, |
3289 | "feature flags set on rev 0 fs, " | |
3290 | "running e2fsck is recommended"); | |
469108ff | 3291 | |
2035e776 TT |
3292 | if (IS_EXT2_SB(sb)) { |
3293 | if (ext2_feature_set_ok(sb)) | |
3294 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3295 | "using the ext4 subsystem"); | |
3296 | else { | |
3297 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3298 | "to feature incompatibilities"); | |
3299 | goto failed_mount; | |
3300 | } | |
3301 | } | |
3302 | ||
3303 | if (IS_EXT3_SB(sb)) { | |
3304 | if (ext3_feature_set_ok(sb)) | |
3305 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3306 | "using the ext4 subsystem"); | |
3307 | else { | |
3308 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3309 | "to feature incompatibilities"); | |
3310 | goto failed_mount; | |
3311 | } | |
3312 | } | |
3313 | ||
ac27a0ec DK |
3314 | /* |
3315 | * Check feature flags regardless of the revision level, since we | |
3316 | * previously didn't change the revision level when setting the flags, | |
3317 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3318 | */ | |
a13fb1a4 | 3319 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3320 | goto failed_mount; |
a13fb1a4 | 3321 | |
617ba13b MC |
3322 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3323 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3324 | ext4_msg(sb, KERN_ERR, |
3325 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3326 | goto failed_mount; |
3327 | } | |
3328 | ||
ac27a0ec | 3329 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3330 | /* Validate the filesystem blocksize */ |
3331 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3332 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3333 | blocksize); |
ac27a0ec DK |
3334 | goto failed_mount; |
3335 | } | |
3336 | ||
2b2d6d01 | 3337 | brelse(bh); |
70bbb3e0 AM |
3338 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3339 | offset = do_div(logical_sb_block, blocksize); | |
3340 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3341 | if (!bh) { |
b31e1552 ES |
3342 | ext4_msg(sb, KERN_ERR, |
3343 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3344 | goto failed_mount; |
3345 | } | |
617ba13b | 3346 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3347 | sbi->s_es = es; |
617ba13b | 3348 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3349 | ext4_msg(sb, KERN_ERR, |
3350 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3351 | goto failed_mount; |
3352 | } | |
3353 | } | |
3354 | ||
a13fb1a4 ES |
3355 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3356 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3357 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3358 | has_huge_files); | |
3359 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3360 | |
617ba13b MC |
3361 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3362 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3363 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3364 | } else { |
3365 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3366 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3367 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3368 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3369 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3370 | ext4_msg(sb, KERN_ERR, |
3371 | "unsupported inode size: %d", | |
2b2d6d01 | 3372 | sbi->s_inode_size); |
ac27a0ec DK |
3373 | goto failed_mount; |
3374 | } | |
ef7f3835 KS |
3375 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3376 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3377 | } |
0b8e58a1 | 3378 | |
0d1ee42f AR |
3379 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3380 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3381 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3382 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3383 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3384 | ext4_msg(sb, KERN_ERR, |
3385 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3386 | sbi->s_desc_size); |
3387 | goto failed_mount; | |
3388 | } | |
3389 | } else | |
3390 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3391 | |
ac27a0ec | 3392 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3393 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3394 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3395 | goto cantfind_ext4; |
0b8e58a1 | 3396 | |
617ba13b | 3397 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3398 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3399 | goto cantfind_ext4; |
ac27a0ec DK |
3400 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3401 | sbi->s_inodes_per_block; | |
0d1ee42f | 3402 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3403 | sbi->s_sbh = bh; |
3404 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3405 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3406 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3407 | |
2b2d6d01 | 3408 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3409 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3410 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3411 | i = le32_to_cpu(es->s_flags); |
3412 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3413 | sbi->s_hash_unsigned = 3; | |
3414 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3415 | #ifdef __CHAR_UNSIGNED__ | |
3416 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3417 | sbi->s_hash_unsigned = 3; | |
3418 | #else | |
3419 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3420 | #endif | |
3421 | sb->s_dirt = 1; | |
3422 | } | |
ac27a0ec | 3423 | |
281b5995 TT |
3424 | /* Handle clustersize */ |
3425 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3426 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3427 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3428 | if (has_bigalloc) { | |
3429 | if (clustersize < blocksize) { | |
3430 | ext4_msg(sb, KERN_ERR, | |
3431 | "cluster size (%d) smaller than " | |
3432 | "block size (%d)", clustersize, blocksize); | |
3433 | goto failed_mount; | |
3434 | } | |
3435 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3436 | le32_to_cpu(es->s_log_block_size); | |
3437 | sbi->s_clusters_per_group = | |
3438 | le32_to_cpu(es->s_clusters_per_group); | |
3439 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3440 | ext4_msg(sb, KERN_ERR, | |
3441 | "#clusters per group too big: %lu", | |
3442 | sbi->s_clusters_per_group); | |
3443 | goto failed_mount; | |
3444 | } | |
3445 | if (sbi->s_blocks_per_group != | |
3446 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3447 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3448 | "clusters per group (%lu) inconsistent", | |
3449 | sbi->s_blocks_per_group, | |
3450 | sbi->s_clusters_per_group); | |
3451 | goto failed_mount; | |
3452 | } | |
3453 | } else { | |
3454 | if (clustersize != blocksize) { | |
3455 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3456 | "block size (%d)", clustersize, | |
3457 | blocksize); | |
3458 | clustersize = blocksize; | |
3459 | } | |
3460 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3461 | ext4_msg(sb, KERN_ERR, | |
3462 | "#blocks per group too big: %lu", | |
3463 | sbi->s_blocks_per_group); | |
3464 | goto failed_mount; | |
3465 | } | |
3466 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3467 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3468 | } |
281b5995 TT |
3469 | sbi->s_cluster_ratio = clustersize / blocksize; |
3470 | ||
ac27a0ec | 3471 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3472 | ext4_msg(sb, KERN_ERR, |
3473 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3474 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3475 | goto failed_mount; |
3476 | } | |
3477 | ||
bf43d84b ES |
3478 | /* |
3479 | * Test whether we have more sectors than will fit in sector_t, | |
3480 | * and whether the max offset is addressable by the page cache. | |
3481 | */ | |
5a9ae68a | 3482 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3483 | ext4_blocks_count(es)); |
5a9ae68a | 3484 | if (err) { |
b31e1552 | 3485 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3486 | " too large to mount safely on this system"); |
ac27a0ec | 3487 | if (sizeof(sector_t) < 8) |
90c699a9 | 3488 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3489 | ret = err; |
ac27a0ec DK |
3490 | goto failed_mount; |
3491 | } | |
3492 | ||
617ba13b MC |
3493 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3494 | goto cantfind_ext4; | |
e7c95593 | 3495 | |
0f2ddca6 FTN |
3496 | /* check blocks count against device size */ |
3497 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3498 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3499 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3500 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3501 | ext4_blocks_count(es), blocks_count); |
3502 | goto failed_mount; | |
3503 | } | |
3504 | ||
0b8e58a1 AD |
3505 | /* |
3506 | * It makes no sense for the first data block to be beyond the end | |
3507 | * of the filesystem. | |
3508 | */ | |
3509 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3510 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3511 | "block %u is beyond end of filesystem (%llu)", | |
3512 | le32_to_cpu(es->s_first_data_block), | |
3513 | ext4_blocks_count(es)); | |
e7c95593 ES |
3514 | goto failed_mount; |
3515 | } | |
bd81d8ee LV |
3516 | blocks_count = (ext4_blocks_count(es) - |
3517 | le32_to_cpu(es->s_first_data_block) + | |
3518 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3519 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3520 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3521 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3522 | "(block count %llu, first data block %u, " |
b31e1552 | 3523 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3524 | ext4_blocks_count(es), |
3525 | le32_to_cpu(es->s_first_data_block), | |
3526 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3527 | goto failed_mount; | |
3528 | } | |
bd81d8ee | 3529 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3530 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3531 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3532 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3533 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3534 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3535 | sizeof(struct buffer_head *), | |
3536 | GFP_KERNEL); | |
ac27a0ec | 3537 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3538 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3539 | goto failed_mount; |
3540 | } | |
3541 | ||
9f6200bb TT |
3542 | if (ext4_proc_root) |
3543 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3544 | |
705895b6 | 3545 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3546 | |
3547 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3548 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3549 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3550 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3551 | ext4_msg(sb, KERN_ERR, |
3552 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3553 | db_count = i; |
3554 | goto failed_mount2; | |
3555 | } | |
3556 | } | |
bfff6873 | 3557 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3558 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3559 | goto failed_mount2; |
3560 | } | |
772cb7c8 JS |
3561 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3562 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3563 | ext4_msg(sb, KERN_ERR, |
3564 | "unable to initialize " | |
3565 | "flex_bg meta info!"); | |
772cb7c8 JS |
3566 | goto failed_mount2; |
3567 | } | |
3568 | ||
ac27a0ec DK |
3569 | sbi->s_gdb_count = db_count; |
3570 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3571 | spin_lock_init(&sbi->s_next_gen_lock); | |
3572 | ||
04496411 TM |
3573 | init_timer(&sbi->s_err_report); |
3574 | sbi->s_err_report.function = print_daily_error_info; | |
3575 | sbi->s_err_report.data = (unsigned long) sb; | |
3576 | ||
57042651 | 3577 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3578 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3579 | if (!err) { |
3580 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3581 | ext4_count_free_inodes(sb)); | |
3582 | } | |
3583 | if (!err) { | |
3584 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3585 | ext4_count_dirs(sb)); | |
3586 | } | |
3587 | if (!err) { | |
57042651 | 3588 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a TT |
3589 | } |
3590 | if (err) { | |
3591 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3592 | goto failed_mount3; | |
3593 | } | |
3594 | ||
c9de560d | 3595 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3596 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3597 | |
ac27a0ec DK |
3598 | /* |
3599 | * set up enough so that it can read an inode | |
3600 | */ | |
9ca92389 TT |
3601 | if (!test_opt(sb, NOLOAD) && |
3602 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3603 | sb->s_op = &ext4_sops; | |
3604 | else | |
3605 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3606 | sb->s_export_op = &ext4_export_ops; |
3607 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3608 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3609 | sb->s_qcop = &ext4_qctl_operations; |
3610 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec | 3611 | #endif |
f2fa2ffc AK |
3612 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3613 | ||
ac27a0ec | 3614 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3615 | mutex_init(&sbi->s_orphan_lock); |
8f82f840 | 3616 | sbi->s_resize_flags = 0; |
ac27a0ec DK |
3617 | |
3618 | sb->s_root = NULL; | |
3619 | ||
3620 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3621 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3622 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3623 | |
c5e06d10 JL |
3624 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3625 | !(sb->s_flags & MS_RDONLY)) | |
3626 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3627 | goto failed_mount3; | |
3628 | ||
ac27a0ec DK |
3629 | /* |
3630 | * The first inode we look at is the journal inode. Don't try | |
3631 | * root first: it may be modified in the journal! | |
3632 | */ | |
3633 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3634 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3635 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3636 | goto failed_mount3; |
0390131b FM |
3637 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3638 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3639 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3640 | "suppressed and not mounted read-only"); | |
744692dc | 3641 | goto failed_mount_wq; |
ac27a0ec | 3642 | } else { |
fd8c37ec | 3643 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3644 | sbi->s_journal = NULL; |
3645 | needs_recovery = 0; | |
3646 | goto no_journal; | |
ac27a0ec DK |
3647 | } |
3648 | ||
eb40a09c JS |
3649 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3650 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3651 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3652 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3653 | goto failed_mount_wq; |
eb40a09c JS |
3654 | } |
3655 | ||
d4da6c9c LT |
3656 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3657 | jbd2_journal_set_features(sbi->s_journal, | |
3658 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3659 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3660 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3661 | jbd2_journal_set_features(sbi->s_journal, | |
3662 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3663 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3664 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3665 | } else { |
3666 | jbd2_journal_clear_features(sbi->s_journal, | |
3667 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3668 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3669 | } | |
818d276c | 3670 | |
ac27a0ec DK |
3671 | /* We have now updated the journal if required, so we can |
3672 | * validate the data journaling mode. */ | |
3673 | switch (test_opt(sb, DATA_FLAGS)) { | |
3674 | case 0: | |
3675 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3676 | * capabilities: ORDERED_DATA if the journal can |
3677 | * cope, else JOURNAL_DATA | |
3678 | */ | |
dab291af MC |
3679 | if (jbd2_journal_check_available_features |
3680 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3681 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3682 | else |
fd8c37ec | 3683 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3684 | break; |
3685 | ||
617ba13b MC |
3686 | case EXT4_MOUNT_ORDERED_DATA: |
3687 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3688 | if (!jbd2_journal_check_available_features |
3689 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3690 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3691 | "requested data journaling mode"); | |
744692dc | 3692 | goto failed_mount_wq; |
ac27a0ec DK |
3693 | } |
3694 | default: | |
3695 | break; | |
3696 | } | |
b3881f74 | 3697 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3698 | |
ce7e010a TT |
3699 | /* |
3700 | * The journal may have updated the bg summary counts, so we | |
3701 | * need to update the global counters. | |
3702 | */ | |
57042651 | 3703 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3704 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3705 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3706 | ext4_count_free_inodes(sb)); | |
3707 | percpu_counter_set(&sbi->s_dirs_counter, | |
3708 | ext4_count_dirs(sb)); | |
57042651 | 3709 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3710 | |
ce7e010a | 3711 | no_journal: |
fd89d5f2 TH |
3712 | /* |
3713 | * The maximum number of concurrent works can be high and | |
3714 | * concurrency isn't really necessary. Limit it to 1. | |
3715 | */ | |
3716 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3717 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3718 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3719 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3720 | goto failed_mount_wq; | |
3721 | } | |
3722 | ||
ac27a0ec | 3723 | /* |
dab291af | 3724 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3725 | * so we can safely mount the rest of the filesystem now. |
3726 | */ | |
3727 | ||
1d1fe1ee DH |
3728 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3729 | if (IS_ERR(root)) { | |
b31e1552 | 3730 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3731 | ret = PTR_ERR(root); |
32a9bb57 | 3732 | root = NULL; |
ac27a0ec DK |
3733 | goto failed_mount4; |
3734 | } | |
3735 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3736 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3737 | goto failed_mount4; |
3738 | } | |
1d1fe1ee DH |
3739 | sb->s_root = d_alloc_root(root); |
3740 | if (!sb->s_root) { | |
b31e1552 | 3741 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3742 | ret = -ENOMEM; |
3743 | goto failed_mount4; | |
3744 | } | |
ac27a0ec | 3745 | |
2b2d6d01 | 3746 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3747 | |
3748 | /* determine the minimum size of new large inodes, if present */ | |
3749 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3750 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3751 | EXT4_GOOD_OLD_INODE_SIZE; | |
3752 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3753 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3754 | if (sbi->s_want_extra_isize < | |
3755 | le16_to_cpu(es->s_want_extra_isize)) | |
3756 | sbi->s_want_extra_isize = | |
3757 | le16_to_cpu(es->s_want_extra_isize); | |
3758 | if (sbi->s_want_extra_isize < | |
3759 | le16_to_cpu(es->s_min_extra_isize)) | |
3760 | sbi->s_want_extra_isize = | |
3761 | le16_to_cpu(es->s_min_extra_isize); | |
3762 | } | |
3763 | } | |
3764 | /* Check if enough inode space is available */ | |
3765 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3766 | sbi->s_inode_size) { | |
3767 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3768 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3769 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3770 | "available"); | |
ef7f3835 KS |
3771 | } |
3772 | ||
6fd058f7 TT |
3773 | err = ext4_setup_system_zone(sb); |
3774 | if (err) { | |
b31e1552 | 3775 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3776 | "zone (%d)", err); |
6fd058f7 TT |
3777 | goto failed_mount4; |
3778 | } | |
3779 | ||
c2774d84 AK |
3780 | ext4_ext_init(sb); |
3781 | err = ext4_mb_init(sb, needs_recovery); | |
3782 | if (err) { | |
421f91d2 | 3783 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3784 | err); |
dcf2d804 | 3785 | goto failed_mount5; |
c2774d84 AK |
3786 | } |
3787 | ||
bfff6873 LC |
3788 | err = ext4_register_li_request(sb, first_not_zeroed); |
3789 | if (err) | |
dcf2d804 | 3790 | goto failed_mount6; |
bfff6873 | 3791 | |
3197ebdb TT |
3792 | sbi->s_kobj.kset = ext4_kset; |
3793 | init_completion(&sbi->s_kobj_unregister); | |
3794 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3795 | "%s", sb->s_id); | |
dcf2d804 TM |
3796 | if (err) |
3797 | goto failed_mount7; | |
3197ebdb | 3798 | |
617ba13b MC |
3799 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3800 | ext4_orphan_cleanup(sb, es); | |
3801 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3802 | if (needs_recovery) { |
b31e1552 | 3803 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3804 | ext4_mark_recovery_complete(sb, es); |
3805 | } | |
3806 | if (EXT4_SB(sb)->s_journal) { | |
3807 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3808 | descr = " journalled data mode"; | |
3809 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3810 | descr = " ordered data mode"; | |
3811 | else | |
3812 | descr = " writeback data mode"; | |
3813 | } else | |
3814 | descr = "out journal"; | |
3815 | ||
d4c402d9 | 3816 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3817 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3818 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3819 | |
66e61a9e TT |
3820 | if (es->s_error_count) |
3821 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3822 | |
d4c402d9 | 3823 | kfree(orig_data); |
ac27a0ec DK |
3824 | return 0; |
3825 | ||
617ba13b | 3826 | cantfind_ext4: |
ac27a0ec | 3827 | if (!silent) |
b31e1552 | 3828 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3829 | goto failed_mount; |
3830 | ||
dcf2d804 TM |
3831 | failed_mount7: |
3832 | ext4_unregister_li_request(sb); | |
3833 | failed_mount6: | |
3834 | ext4_ext_release(sb); | |
3835 | failed_mount5: | |
3836 | ext4_mb_release(sb); | |
3837 | ext4_release_system_zone(sb); | |
ac27a0ec | 3838 | failed_mount4: |
32a9bb57 MK |
3839 | iput(root); |
3840 | sb->s_root = NULL; | |
b31e1552 | 3841 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3842 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3843 | failed_mount_wq: | |
0390131b FM |
3844 | if (sbi->s_journal) { |
3845 | jbd2_journal_destroy(sbi->s_journal); | |
3846 | sbi->s_journal = NULL; | |
3847 | } | |
ac27a0ec | 3848 | failed_mount3: |
04496411 | 3849 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
3850 | if (sbi->s_flex_groups) |
3851 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 3852 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
3853 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
3854 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 3855 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c5e06d10 JL |
3856 | if (sbi->s_mmp_tsk) |
3857 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
3858 | failed_mount2: |
3859 | for (i = 0; i < db_count; i++) | |
3860 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 3861 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 3862 | failed_mount: |
240799cd | 3863 | if (sbi->s_proc) { |
9f6200bb | 3864 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3865 | } |
ac27a0ec DK |
3866 | #ifdef CONFIG_QUOTA |
3867 | for (i = 0; i < MAXQUOTAS; i++) | |
3868 | kfree(sbi->s_qf_names[i]); | |
3869 | #endif | |
617ba13b | 3870 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3871 | brelse(bh); |
3872 | out_fail: | |
3873 | sb->s_fs_info = NULL; | |
f6830165 | 3874 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3875 | kfree(sbi); |
dcc7dae3 | 3876 | out_free_orig: |
d4c402d9 | 3877 | kfree(orig_data); |
1d1fe1ee | 3878 | return ret; |
ac27a0ec DK |
3879 | } |
3880 | ||
3881 | /* | |
3882 | * Setup any per-fs journal parameters now. We'll do this both on | |
3883 | * initial mount, once the journal has been initialised but before we've | |
3884 | * done any recovery; and again on any subsequent remount. | |
3885 | */ | |
617ba13b | 3886 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3887 | { |
617ba13b | 3888 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3889 | |
30773840 TT |
3890 | journal->j_commit_interval = sbi->s_commit_interval; |
3891 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3892 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3893 | |
a931da6a | 3894 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3895 | if (test_opt(sb, BARRIER)) |
dab291af | 3896 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3897 | else |
dab291af | 3898 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3899 | if (test_opt(sb, DATA_ERR_ABORT)) |
3900 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3901 | else | |
3902 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3903 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3904 | } |
3905 | ||
617ba13b | 3906 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3907 | unsigned int journal_inum) |
3908 | { | |
3909 | struct inode *journal_inode; | |
3910 | journal_t *journal; | |
3911 | ||
0390131b FM |
3912 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3913 | ||
ac27a0ec DK |
3914 | /* First, test for the existence of a valid inode on disk. Bad |
3915 | * things happen if we iget() an unused inode, as the subsequent | |
3916 | * iput() will try to delete it. */ | |
3917 | ||
1d1fe1ee DH |
3918 | journal_inode = ext4_iget(sb, journal_inum); |
3919 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3920 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3921 | return NULL; |
3922 | } | |
3923 | if (!journal_inode->i_nlink) { | |
3924 | make_bad_inode(journal_inode); | |
3925 | iput(journal_inode); | |
b31e1552 | 3926 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3927 | return NULL; |
3928 | } | |
3929 | ||
e5f8eab8 | 3930 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3931 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3932 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3933 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3934 | iput(journal_inode); |
3935 | return NULL; | |
3936 | } | |
3937 | ||
dab291af | 3938 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3939 | if (!journal) { |
b31e1552 | 3940 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3941 | iput(journal_inode); |
3942 | return NULL; | |
3943 | } | |
3944 | journal->j_private = sb; | |
617ba13b | 3945 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3946 | return journal; |
3947 | } | |
3948 | ||
617ba13b | 3949 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3950 | dev_t j_dev) |
3951 | { | |
2b2d6d01 | 3952 | struct buffer_head *bh; |
ac27a0ec | 3953 | journal_t *journal; |
617ba13b MC |
3954 | ext4_fsblk_t start; |
3955 | ext4_fsblk_t len; | |
ac27a0ec | 3956 | int hblock, blocksize; |
617ba13b | 3957 | ext4_fsblk_t sb_block; |
ac27a0ec | 3958 | unsigned long offset; |
2b2d6d01 | 3959 | struct ext4_super_block *es; |
ac27a0ec DK |
3960 | struct block_device *bdev; |
3961 | ||
0390131b FM |
3962 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3963 | ||
b31e1552 | 3964 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3965 | if (bdev == NULL) |
3966 | return NULL; | |
3967 | ||
ac27a0ec | 3968 | blocksize = sb->s_blocksize; |
e1defc4f | 3969 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3970 | if (blocksize < hblock) { |
b31e1552 ES |
3971 | ext4_msg(sb, KERN_ERR, |
3972 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3973 | goto out_bdev; |
3974 | } | |
3975 | ||
617ba13b MC |
3976 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3977 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3978 | set_blocksize(bdev, blocksize); |
3979 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3980 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3981 | "external journal"); | |
ac27a0ec DK |
3982 | goto out_bdev; |
3983 | } | |
3984 | ||
617ba13b MC |
3985 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3986 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3987 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3988 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3989 | ext4_msg(sb, KERN_ERR, "external journal has " |
3990 | "bad superblock"); | |
ac27a0ec DK |
3991 | brelse(bh); |
3992 | goto out_bdev; | |
3993 | } | |
3994 | ||
617ba13b | 3995 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3996 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3997 | brelse(bh); |
3998 | goto out_bdev; | |
3999 | } | |
4000 | ||
bd81d8ee | 4001 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4002 | start = sb_block + 1; |
4003 | brelse(bh); /* we're done with the superblock */ | |
4004 | ||
dab291af | 4005 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4006 | start, len, blocksize); |
4007 | if (!journal) { | |
b31e1552 | 4008 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4009 | goto out_bdev; |
4010 | } | |
4011 | journal->j_private = sb; | |
4012 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
4013 | wait_on_buffer(journal->j_sb_buffer); | |
4014 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4015 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4016 | goto out_journal; |
4017 | } | |
4018 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4019 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4020 | "user (unsupported) - %d", | |
ac27a0ec DK |
4021 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4022 | goto out_journal; | |
4023 | } | |
617ba13b MC |
4024 | EXT4_SB(sb)->journal_bdev = bdev; |
4025 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4026 | return journal; |
0b8e58a1 | 4027 | |
ac27a0ec | 4028 | out_journal: |
dab291af | 4029 | jbd2_journal_destroy(journal); |
ac27a0ec | 4030 | out_bdev: |
617ba13b | 4031 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4032 | return NULL; |
4033 | } | |
4034 | ||
617ba13b MC |
4035 | static int ext4_load_journal(struct super_block *sb, |
4036 | struct ext4_super_block *es, | |
ac27a0ec DK |
4037 | unsigned long journal_devnum) |
4038 | { | |
4039 | journal_t *journal; | |
4040 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4041 | dev_t journal_dev; | |
4042 | int err = 0; | |
4043 | int really_read_only; | |
4044 | ||
0390131b FM |
4045 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4046 | ||
ac27a0ec DK |
4047 | if (journal_devnum && |
4048 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4049 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4050 | "numbers have changed"); | |
ac27a0ec DK |
4051 | journal_dev = new_decode_dev(journal_devnum); |
4052 | } else | |
4053 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4054 | ||
4055 | really_read_only = bdev_read_only(sb->s_bdev); | |
4056 | ||
4057 | /* | |
4058 | * Are we loading a blank journal or performing recovery after a | |
4059 | * crash? For recovery, we need to check in advance whether we | |
4060 | * can get read-write access to the device. | |
4061 | */ | |
617ba13b | 4062 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4063 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4064 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4065 | "required on readonly filesystem"); | |
ac27a0ec | 4066 | if (really_read_only) { |
b31e1552 ES |
4067 | ext4_msg(sb, KERN_ERR, "write access " |
4068 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4069 | return -EROFS; |
4070 | } | |
b31e1552 ES |
4071 | ext4_msg(sb, KERN_INFO, "write access will " |
4072 | "be enabled during recovery"); | |
ac27a0ec DK |
4073 | } |
4074 | } | |
4075 | ||
4076 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4077 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4078 | "and inode journals!"); | |
ac27a0ec DK |
4079 | return -EINVAL; |
4080 | } | |
4081 | ||
4082 | if (journal_inum) { | |
617ba13b | 4083 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4084 | return -EINVAL; |
4085 | } else { | |
617ba13b | 4086 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4087 | return -EINVAL; |
4088 | } | |
4089 | ||
90576c0b | 4090 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4091 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4092 | |
ac27a0ec | 4093 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 4094 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 4095 | if (err) { |
b31e1552 | 4096 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 4097 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4098 | return err; |
4099 | } | |
4100 | } | |
4101 | ||
617ba13b | 4102 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4103 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4104 | if (!err) { |
4105 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4106 | if (save) | |
4107 | memcpy(save, ((char *) es) + | |
4108 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4109 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4110 | if (save) |
4111 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4112 | save, EXT4_S_ERR_LEN); | |
4113 | kfree(save); | |
4114 | } | |
ac27a0ec DK |
4115 | |
4116 | if (err) { | |
b31e1552 | 4117 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4118 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4119 | return err; |
4120 | } | |
4121 | ||
617ba13b MC |
4122 | EXT4_SB(sb)->s_journal = journal; |
4123 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4124 | |
c41303ce | 4125 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4126 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4127 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4128 | |
4129 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4130 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4131 | } |
4132 | ||
4133 | return 0; | |
4134 | } | |
4135 | ||
e2d67052 | 4136 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4137 | { |
e2d67052 | 4138 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4139 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4140 | int error = 0; |
ac27a0ec | 4141 | |
7c2e7087 | 4142 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4143 | return error; |
914258bf TT |
4144 | if (buffer_write_io_error(sbh)) { |
4145 | /* | |
4146 | * Oh, dear. A previous attempt to write the | |
4147 | * superblock failed. This could happen because the | |
4148 | * USB device was yanked out. Or it could happen to | |
4149 | * be a transient write error and maybe the block will | |
4150 | * be remapped. Nothing we can do but to retry the | |
4151 | * write and hope for the best. | |
4152 | */ | |
b31e1552 ES |
4153 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4154 | "superblock detected"); | |
914258bf TT |
4155 | clear_buffer_write_io_error(sbh); |
4156 | set_buffer_uptodate(sbh); | |
4157 | } | |
71290b36 TT |
4158 | /* |
4159 | * If the file system is mounted read-only, don't update the | |
4160 | * superblock write time. This avoids updating the superblock | |
4161 | * write time when we are mounting the root file system | |
4162 | * read/only but we need to replay the journal; at that point, | |
4163 | * for people who are east of GMT and who make their clock | |
4164 | * tick in localtime for Windows bug-for-bug compatibility, | |
4165 | * the clock is set in the future, and this will cause e2fsck | |
4166 | * to complain and force a full file system check. | |
4167 | */ | |
4168 | if (!(sb->s_flags & MS_RDONLY)) | |
4169 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4170 | if (sb->s_bdev->bd_part) |
4171 | es->s_kbytes_written = | |
4172 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4173 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4174 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4175 | else |
4176 | es->s_kbytes_written = | |
4177 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4178 | ext4_free_blocks_count_set(es, |
4179 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4180 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4181 | es->s_free_inodes_count = |
4182 | cpu_to_le32(percpu_counter_sum_positive( | |
4183 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4184 | sb->s_dirt = 0; |
ac27a0ec DK |
4185 | BUFFER_TRACE(sbh, "marking dirty"); |
4186 | mark_buffer_dirty(sbh); | |
914258bf | 4187 | if (sync) { |
c4be0c1d TS |
4188 | error = sync_dirty_buffer(sbh); |
4189 | if (error) | |
4190 | return error; | |
4191 | ||
4192 | error = buffer_write_io_error(sbh); | |
4193 | if (error) { | |
b31e1552 ES |
4194 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4195 | "superblock"); | |
914258bf TT |
4196 | clear_buffer_write_io_error(sbh); |
4197 | set_buffer_uptodate(sbh); | |
4198 | } | |
4199 | } | |
c4be0c1d | 4200 | return error; |
ac27a0ec DK |
4201 | } |
4202 | ||
ac27a0ec DK |
4203 | /* |
4204 | * Have we just finished recovery? If so, and if we are mounting (or | |
4205 | * remounting) the filesystem readonly, then we will end up with a | |
4206 | * consistent fs on disk. Record that fact. | |
4207 | */ | |
2b2d6d01 TT |
4208 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4209 | struct ext4_super_block *es) | |
ac27a0ec | 4210 | { |
617ba13b | 4211 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4212 | |
0390131b FM |
4213 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4214 | BUG_ON(journal != NULL); | |
4215 | return; | |
4216 | } | |
dab291af | 4217 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4218 | if (jbd2_journal_flush(journal) < 0) |
4219 | goto out; | |
4220 | ||
617ba13b | 4221 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4222 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4223 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4224 | ext4_commit_super(sb, 1); |
ac27a0ec | 4225 | } |
7ffe1ea8 HK |
4226 | |
4227 | out: | |
dab291af | 4228 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4229 | } |
4230 | ||
4231 | /* | |
4232 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4233 | * has recorded an error from a previous lifetime, move that error to the | |
4234 | * main filesystem now. | |
4235 | */ | |
2b2d6d01 TT |
4236 | static void ext4_clear_journal_err(struct super_block *sb, |
4237 | struct ext4_super_block *es) | |
ac27a0ec DK |
4238 | { |
4239 | journal_t *journal; | |
4240 | int j_errno; | |
4241 | const char *errstr; | |
4242 | ||
0390131b FM |
4243 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4244 | ||
617ba13b | 4245 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4246 | |
4247 | /* | |
4248 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4249 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4250 | */ |
4251 | ||
dab291af | 4252 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4253 | if (j_errno) { |
4254 | char nbuf[16]; | |
4255 | ||
617ba13b | 4256 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4257 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4258 | "from previous mount: %s", errstr); |
12062ddd | 4259 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4260 | |
617ba13b MC |
4261 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4262 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4263 | ext4_commit_super(sb, 1); |
ac27a0ec | 4264 | |
dab291af | 4265 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4266 | } |
4267 | } | |
4268 | ||
4269 | /* | |
4270 | * Force the running and committing transactions to commit, | |
4271 | * and wait on the commit. | |
4272 | */ | |
617ba13b | 4273 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4274 | { |
4275 | journal_t *journal; | |
0390131b | 4276 | int ret = 0; |
ac27a0ec DK |
4277 | |
4278 | if (sb->s_flags & MS_RDONLY) | |
4279 | return 0; | |
4280 | ||
617ba13b | 4281 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4282 | if (journal) { |
437f88cc | 4283 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4284 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4285 | } |
0390131b | 4286 | |
ac27a0ec DK |
4287 | return ret; |
4288 | } | |
4289 | ||
2b2d6d01 | 4290 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4291 | { |
ebc1ac16 | 4292 | lock_super(sb); |
9ca92389 | 4293 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4294 | unlock_super(sb); |
ac27a0ec DK |
4295 | } |
4296 | ||
617ba13b | 4297 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4298 | { |
14ce0cb4 | 4299 | int ret = 0; |
9eddacf9 | 4300 | tid_t target; |
8d5d02e6 | 4301 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4302 | |
9bffad1e | 4303 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4304 | flush_workqueue(sbi->dio_unwritten_wq); |
4305 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4306 | if (wait) |
8d5d02e6 | 4307 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4308 | } |
14ce0cb4 | 4309 | return ret; |
ac27a0ec DK |
4310 | } |
4311 | ||
4312 | /* | |
4313 | * LVM calls this function before a (read-only) snapshot is created. This | |
4314 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4315 | * |
4316 | * Note that only this function cannot bring a filesystem to be in a clean | |
4317 | * state independently, because ext4 prevents a new handle from being started | |
4318 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from | |
4319 | * the upper layer. | |
ac27a0ec | 4320 | */ |
c4be0c1d | 4321 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4322 | { |
c4be0c1d TS |
4323 | int error = 0; |
4324 | journal_t *journal; | |
ac27a0ec | 4325 | |
9ca92389 TT |
4326 | if (sb->s_flags & MS_RDONLY) |
4327 | return 0; | |
ac27a0ec | 4328 | |
9ca92389 | 4329 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4330 | |
9ca92389 TT |
4331 | /* Now we set up the journal barrier. */ |
4332 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4333 | |
9ca92389 TT |
4334 | /* |
4335 | * Don't clear the needs_recovery flag if we failed to flush | |
4336 | * the journal. | |
4337 | */ | |
4338 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4339 | if (error < 0) |
4340 | goto out; | |
9ca92389 TT |
4341 | |
4342 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4343 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4344 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4345 | out: |
4346 | /* we rely on s_frozen to stop further updates */ | |
4347 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4348 | return error; | |
ac27a0ec DK |
4349 | } |
4350 | ||
4351 | /* | |
4352 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4353 | * flag here, even though the filesystem is not technically dirty yet. | |
4354 | */ | |
c4be0c1d | 4355 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4356 | { |
9ca92389 TT |
4357 | if (sb->s_flags & MS_RDONLY) |
4358 | return 0; | |
4359 | ||
4360 | lock_super(sb); | |
4361 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4362 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4363 | ext4_commit_super(sb, 1); | |
4364 | unlock_super(sb); | |
c4be0c1d | 4365 | return 0; |
ac27a0ec DK |
4366 | } |
4367 | ||
673c6100 TT |
4368 | /* |
4369 | * Structure to save mount options for ext4_remount's benefit | |
4370 | */ | |
4371 | struct ext4_mount_options { | |
4372 | unsigned long s_mount_opt; | |
a2595b8a | 4373 | unsigned long s_mount_opt2; |
673c6100 TT |
4374 | uid_t s_resuid; |
4375 | gid_t s_resgid; | |
4376 | unsigned long s_commit_interval; | |
4377 | u32 s_min_batch_time, s_max_batch_time; | |
4378 | #ifdef CONFIG_QUOTA | |
4379 | int s_jquota_fmt; | |
4380 | char *s_qf_names[MAXQUOTAS]; | |
4381 | #endif | |
4382 | }; | |
4383 | ||
2b2d6d01 | 4384 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4385 | { |
2b2d6d01 | 4386 | struct ext4_super_block *es; |
617ba13b MC |
4387 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4388 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4389 | unsigned long old_sb_flags; |
617ba13b | 4390 | struct ext4_mount_options old_opts; |
c79d967d | 4391 | int enable_quota = 0; |
8a266467 | 4392 | ext4_group_t g; |
b3881f74 | 4393 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4394 | int err = 0; |
ac27a0ec DK |
4395 | #ifdef CONFIG_QUOTA |
4396 | int i; | |
4397 | #endif | |
d4c402d9 | 4398 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4399 | |
4400 | /* Store the original options */ | |
bbd6851a | 4401 | lock_super(sb); |
ac27a0ec DK |
4402 | old_sb_flags = sb->s_flags; |
4403 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4404 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4405 | old_opts.s_resuid = sbi->s_resuid; |
4406 | old_opts.s_resgid = sbi->s_resgid; | |
4407 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4408 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4409 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4410 | #ifdef CONFIG_QUOTA |
4411 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4412 | for (i = 0; i < MAXQUOTAS; i++) | |
4413 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4414 | #endif | |
b3881f74 TT |
4415 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4416 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4417 | |
4418 | /* | |
4419 | * Allow the "check" option to be passed as a remount option. | |
4420 | */ | |
b3881f74 TT |
4421 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4422 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4423 | err = -EINVAL; |
4424 | goto restore_opts; | |
4425 | } | |
4426 | ||
4ab2f15b | 4427 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4428 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4429 | |
4430 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4431 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4432 | |
4433 | es = sbi->s_es; | |
4434 | ||
b3881f74 | 4435 | if (sbi->s_journal) { |
0390131b | 4436 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4437 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4438 | } | |
ac27a0ec DK |
4439 | |
4440 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4441 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4442 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4443 | err = -EROFS; |
4444 | goto restore_opts; | |
4445 | } | |
4446 | ||
4447 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4448 | err = dquot_suspend(sb, -1); |
4449 | if (err < 0) | |
c79d967d | 4450 | goto restore_opts; |
c79d967d | 4451 | |
ac27a0ec DK |
4452 | /* |
4453 | * First of all, the unconditional stuff we have to do | |
4454 | * to disable replay of the journal when we next remount | |
4455 | */ | |
4456 | sb->s_flags |= MS_RDONLY; | |
4457 | ||
4458 | /* | |
4459 | * OK, test if we are remounting a valid rw partition | |
4460 | * readonly, and if so set the rdonly flag and then | |
4461 | * mark the partition as valid again. | |
4462 | */ | |
617ba13b MC |
4463 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4464 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4465 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4466 | ||
a63c9eb2 | 4467 | if (sbi->s_journal) |
0390131b | 4468 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4469 | } else { |
a13fb1a4 ES |
4470 | /* Make sure we can mount this feature set readwrite */ |
4471 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4472 | err = -EROFS; |
4473 | goto restore_opts; | |
4474 | } | |
8a266467 TT |
4475 | /* |
4476 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4477 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4478 | */ |
4479 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4480 | struct ext4_group_desc *gdp = | |
4481 | ext4_get_group_desc(sb, g, NULL); | |
4482 | ||
4483 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4484 | ext4_msg(sb, KERN_ERR, |
4485 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4486 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4487 | le16_to_cpu(gdp->bg_checksum)); | |
4488 | err = -EINVAL; | |
4489 | goto restore_opts; | |
4490 | } | |
4491 | } | |
4492 | ||
ead6596b ES |
4493 | /* |
4494 | * If we have an unprocessed orphan list hanging | |
4495 | * around from a previously readonly bdev mount, | |
4496 | * require a full umount/remount for now. | |
4497 | */ | |
4498 | if (es->s_last_orphan) { | |
b31e1552 | 4499 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4500 | "remount RDWR because of unprocessed " |
4501 | "orphan inode list. Please " | |
b31e1552 | 4502 | "umount/remount instead"); |
ead6596b ES |
4503 | err = -EINVAL; |
4504 | goto restore_opts; | |
4505 | } | |
4506 | ||
ac27a0ec DK |
4507 | /* |
4508 | * Mounting a RDONLY partition read-write, so reread | |
4509 | * and store the current valid flag. (It may have | |
4510 | * been changed by e2fsck since we originally mounted | |
4511 | * the partition.) | |
4512 | */ | |
0390131b FM |
4513 | if (sbi->s_journal) |
4514 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4515 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4516 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4517 | goto restore_opts; |
2b2d6d01 | 4518 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4519 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4520 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4521 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4522 | if (ext4_multi_mount_protect(sb, | |
4523 | le64_to_cpu(es->s_mmp_block))) { | |
4524 | err = -EROFS; | |
4525 | goto restore_opts; | |
4526 | } | |
c79d967d | 4527 | enable_quota = 1; |
ac27a0ec DK |
4528 | } |
4529 | } | |
bfff6873 LC |
4530 | |
4531 | /* | |
4532 | * Reinitialize lazy itable initialization thread based on | |
4533 | * current settings | |
4534 | */ | |
4535 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4536 | ext4_unregister_li_request(sb); | |
4537 | else { | |
4538 | ext4_group_t first_not_zeroed; | |
4539 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4540 | ext4_register_li_request(sb, first_not_zeroed); | |
4541 | } | |
4542 | ||
6fd058f7 | 4543 | ext4_setup_system_zone(sb); |
0390131b | 4544 | if (sbi->s_journal == NULL) |
e2d67052 | 4545 | ext4_commit_super(sb, 1); |
0390131b | 4546 | |
ac27a0ec DK |
4547 | #ifdef CONFIG_QUOTA |
4548 | /* Release old quota file names */ | |
4549 | for (i = 0; i < MAXQUOTAS; i++) | |
4550 | if (old_opts.s_qf_names[i] && | |
4551 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4552 | kfree(old_opts.s_qf_names[i]); | |
4553 | #endif | |
bbd6851a | 4554 | unlock_super(sb); |
c79d967d | 4555 | if (enable_quota) |
0f0dd62f | 4556 | dquot_resume(sb, -1); |
d4c402d9 CW |
4557 | |
4558 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4559 | kfree(orig_data); | |
ac27a0ec | 4560 | return 0; |
0b8e58a1 | 4561 | |
ac27a0ec DK |
4562 | restore_opts: |
4563 | sb->s_flags = old_sb_flags; | |
4564 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4565 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4566 | sbi->s_resuid = old_opts.s_resuid; |
4567 | sbi->s_resgid = old_opts.s_resgid; | |
4568 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4569 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4570 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4571 | #ifdef CONFIG_QUOTA |
4572 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4573 | for (i = 0; i < MAXQUOTAS; i++) { | |
4574 | if (sbi->s_qf_names[i] && | |
4575 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4576 | kfree(sbi->s_qf_names[i]); | |
4577 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4578 | } | |
4579 | #endif | |
bbd6851a | 4580 | unlock_super(sb); |
d4c402d9 | 4581 | kfree(orig_data); |
ac27a0ec DK |
4582 | return err; |
4583 | } | |
4584 | ||
f975d6bc TT |
4585 | /* |
4586 | * Note: calculating the overhead so we can be compatible with | |
4587 | * historical BSD practice is quite difficult in the face of | |
4588 | * clusters/bigalloc. This is because multiple metadata blocks from | |
4589 | * different block group can end up in the same allocation cluster. | |
4590 | * Calculating the exact overhead in the face of clustered allocation | |
4591 | * requires either O(all block bitmaps) in memory or O(number of block | |
4592 | * groups**2) in time. We will still calculate the superblock for | |
4593 | * older file systems --- and if we come across with a bigalloc file | |
4594 | * system with zero in s_overhead_clusters the estimate will be close to | |
4595 | * correct especially for very large cluster sizes --- but for newer | |
4596 | * file systems, it's better to calculate this figure once at mkfs | |
4597 | * time, and store it in the superblock. If the superblock value is | |
4598 | * present (even for non-bigalloc file systems), we will use it. | |
4599 | */ | |
2b2d6d01 | 4600 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4601 | { |
4602 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4603 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4604 | struct ext4_super_block *es = sbi->s_es; | |
f975d6bc | 4605 | struct ext4_group_desc *gdp; |
960cc398 | 4606 | u64 fsid; |
d02a9391 | 4607 | s64 bfree; |
ac27a0ec | 4608 | |
5e70030d BP |
4609 | if (test_opt(sb, MINIX_DF)) { |
4610 | sbi->s_overhead_last = 0; | |
f975d6bc TT |
4611 | } else if (es->s_overhead_clusters) { |
4612 | sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); | |
6bc9feff | 4613 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4614 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4615 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4616 | |
4617 | /* | |
5e70030d BP |
4618 | * Compute the overhead (FS structures). This is constant |
4619 | * for a given filesystem unless the number of block groups | |
4620 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4621 | */ |
4622 | ||
4623 | /* | |
4624 | * All of the blocks before first_data_block are | |
4625 | * overhead | |
4626 | */ | |
f975d6bc | 4627 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); |
ac27a0ec DK |
4628 | |
4629 | /* | |
f975d6bc | 4630 | * Add the overhead found in each block group |
ac27a0ec DK |
4631 | */ |
4632 | for (i = 0; i < ngroups; i++) { | |
f975d6bc TT |
4633 | gdp = ext4_get_group_desc(sb, i, NULL); |
4634 | overhead += ext4_num_overhead_clusters(sb, i, gdp); | |
ac27a0ec DK |
4635 | cond_resched(); |
4636 | } | |
5e70030d BP |
4637 | sbi->s_overhead_last = overhead; |
4638 | smp_wmb(); | |
6bc9feff | 4639 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4640 | } |
4641 | ||
617ba13b | 4642 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4643 | buf->f_bsize = sb->s_blocksize; |
f975d6bc TT |
4644 | buf->f_blocks = (ext4_blocks_count(es) - |
4645 | EXT4_C2B(sbi, sbi->s_overhead_last)); | |
57042651 TT |
4646 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4647 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4648 | /* prevent underflow in case that few free space is available */ |
57042651 | 4649 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
bd81d8ee LV |
4650 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4651 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4652 | buf->f_bavail = 0; |
4653 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4654 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4655 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4656 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4657 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4658 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4659 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4660 | |
ac27a0ec DK |
4661 | return 0; |
4662 | } | |
4663 | ||
0b8e58a1 AD |
4664 | /* Helper function for writing quotas on sync - we need to start transaction |
4665 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4666 | * Process 1 Process 2 |
617ba13b | 4667 | * ext4_create() quota_sync() |
a269eb18 | 4668 | * jbd2_journal_start() write_dquot() |
871a2931 | 4669 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4670 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4671 | * |
4672 | */ | |
4673 | ||
4674 | #ifdef CONFIG_QUOTA | |
4675 | ||
4676 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4677 | { | |
4678 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4679 | } | |
4680 | ||
617ba13b | 4681 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4682 | { |
4683 | int ret, err; | |
4684 | handle_t *handle; | |
4685 | struct inode *inode; | |
4686 | ||
4687 | inode = dquot_to_inode(dquot); | |
617ba13b | 4688 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4689 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4690 | if (IS_ERR(handle)) |
4691 | return PTR_ERR(handle); | |
4692 | ret = dquot_commit(dquot); | |
617ba13b | 4693 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4694 | if (!ret) |
4695 | ret = err; | |
4696 | return ret; | |
4697 | } | |
4698 | ||
617ba13b | 4699 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4700 | { |
4701 | int ret, err; | |
4702 | handle_t *handle; | |
4703 | ||
617ba13b | 4704 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4705 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4706 | if (IS_ERR(handle)) |
4707 | return PTR_ERR(handle); | |
4708 | ret = dquot_acquire(dquot); | |
617ba13b | 4709 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4710 | if (!ret) |
4711 | ret = err; | |
4712 | return ret; | |
4713 | } | |
4714 | ||
617ba13b | 4715 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4716 | { |
4717 | int ret, err; | |
4718 | handle_t *handle; | |
4719 | ||
617ba13b | 4720 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4721 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4722 | if (IS_ERR(handle)) { |
4723 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4724 | dquot_release(dquot); | |
ac27a0ec | 4725 | return PTR_ERR(handle); |
9c3013e9 | 4726 | } |
ac27a0ec | 4727 | ret = dquot_release(dquot); |
617ba13b | 4728 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4729 | if (!ret) |
4730 | ret = err; | |
4731 | return ret; | |
4732 | } | |
4733 | ||
617ba13b | 4734 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4735 | { |
2c8be6b2 | 4736 | /* Are we journaling quotas? */ |
617ba13b MC |
4737 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4738 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4739 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4740 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4741 | } else { |
4742 | return dquot_mark_dquot_dirty(dquot); | |
4743 | } | |
4744 | } | |
4745 | ||
617ba13b | 4746 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4747 | { |
4748 | int ret, err; | |
4749 | handle_t *handle; | |
4750 | ||
4751 | /* Data block + inode block */ | |
617ba13b | 4752 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4753 | if (IS_ERR(handle)) |
4754 | return PTR_ERR(handle); | |
4755 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4756 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4757 | if (!ret) |
4758 | ret = err; | |
4759 | return ret; | |
4760 | } | |
4761 | ||
4762 | /* | |
4763 | * Turn on quotas during mount time - we need to find | |
4764 | * the quota file and such... | |
4765 | */ | |
617ba13b | 4766 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4767 | { |
287a8095 CH |
4768 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4769 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4770 | } |
4771 | ||
4772 | /* | |
4773 | * Standard function to be called on quota_on | |
4774 | */ | |
617ba13b | 4775 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4776 | struct path *path) |
ac27a0ec DK |
4777 | { |
4778 | int err; | |
ac27a0ec DK |
4779 | |
4780 | if (!test_opt(sb, QUOTA)) | |
4781 | return -EINVAL; | |
0623543b | 4782 | |
ac27a0ec | 4783 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 4784 | if (path->mnt->mnt_sb != sb) |
ac27a0ec | 4785 | return -EXDEV; |
0623543b JK |
4786 | /* Journaling quota? */ |
4787 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4788 | /* Quotafile not in fs root? */ |
f00c9e44 | 4789 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4790 | ext4_msg(sb, KERN_WARNING, |
4791 | "Quota file not on filesystem root. " | |
4792 | "Journaled quota will not work"); | |
2b2d6d01 | 4793 | } |
0623543b JK |
4794 | |
4795 | /* | |
4796 | * When we journal data on quota file, we have to flush journal to see | |
4797 | * all updates to the file when we bypass pagecache... | |
4798 | */ | |
0390131b | 4799 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4800 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4801 | /* |
4802 | * We don't need to lock updates but journal_flush() could | |
4803 | * otherwise be livelocked... | |
4804 | */ | |
4805 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4806 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4807 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4808 | if (err) |
7ffe1ea8 | 4809 | return err; |
0623543b JK |
4810 | } |
4811 | ||
f00c9e44 | 4812 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4813 | } |
4814 | ||
ca0e05e4 DM |
4815 | static int ext4_quota_off(struct super_block *sb, int type) |
4816 | { | |
21f97697 JK |
4817 | struct inode *inode = sb_dqopt(sb)->files[type]; |
4818 | handle_t *handle; | |
4819 | ||
87009d86 DM |
4820 | /* Force all delayed allocation blocks to be allocated. |
4821 | * Caller already holds s_umount sem */ | |
4822 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4823 | sync_filesystem(sb); |
ca0e05e4 | 4824 | |
0b268590 AG |
4825 | if (!inode) |
4826 | goto out; | |
4827 | ||
21f97697 JK |
4828 | /* Update modification times of quota files when userspace can |
4829 | * start looking at them */ | |
4830 | handle = ext4_journal_start(inode, 1); | |
4831 | if (IS_ERR(handle)) | |
4832 | goto out; | |
4833 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
4834 | ext4_mark_inode_dirty(handle, inode); | |
4835 | ext4_journal_stop(handle); | |
4836 | ||
4837 | out: | |
ca0e05e4 DM |
4838 | return dquot_quota_off(sb, type); |
4839 | } | |
4840 | ||
ac27a0ec DK |
4841 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4842 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 4843 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 4844 | * we don't have to be afraid of races */ |
617ba13b | 4845 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4846 | size_t len, loff_t off) |
4847 | { | |
4848 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4849 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4850 | int err = 0; |
4851 | int offset = off & (sb->s_blocksize - 1); | |
4852 | int tocopy; | |
4853 | size_t toread; | |
4854 | struct buffer_head *bh; | |
4855 | loff_t i_size = i_size_read(inode); | |
4856 | ||
4857 | if (off > i_size) | |
4858 | return 0; | |
4859 | if (off+len > i_size) | |
4860 | len = i_size-off; | |
4861 | toread = len; | |
4862 | while (toread > 0) { | |
4863 | tocopy = sb->s_blocksize - offset < toread ? | |
4864 | sb->s_blocksize - offset : toread; | |
617ba13b | 4865 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4866 | if (err) |
4867 | return err; | |
4868 | if (!bh) /* A hole? */ | |
4869 | memset(data, 0, tocopy); | |
4870 | else | |
4871 | memcpy(data, bh->b_data+offset, tocopy); | |
4872 | brelse(bh); | |
4873 | offset = 0; | |
4874 | toread -= tocopy; | |
4875 | data += tocopy; | |
4876 | blk++; | |
4877 | } | |
4878 | return len; | |
4879 | } | |
4880 | ||
4881 | /* Write to quotafile (we know the transaction is already started and has | |
4882 | * enough credits) */ | |
617ba13b | 4883 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4884 | const char *data, size_t len, loff_t off) |
4885 | { | |
4886 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4887 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4888 | int err = 0; |
4889 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4890 | struct buffer_head *bh; |
4891 | handle_t *handle = journal_current_handle(); | |
4892 | ||
0390131b | 4893 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4894 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4895 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4896 | (unsigned long long)off, (unsigned long long)len); |
4897 | return -EIO; | |
4898 | } | |
67eeb568 DM |
4899 | /* |
4900 | * Since we account only one data block in transaction credits, | |
4901 | * then it is impossible to cross a block boundary. | |
4902 | */ | |
4903 | if (sb->s_blocksize - offset < len) { | |
4904 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4905 | " cancelled because not block aligned", | |
4906 | (unsigned long long)off, (unsigned long long)len); | |
4907 | return -EIO; | |
4908 | } | |
4909 | ||
ac27a0ec | 4910 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4911 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4912 | if (!bh) | |
4913 | goto out; | |
62d2b5f2 JK |
4914 | err = ext4_journal_get_write_access(handle, bh); |
4915 | if (err) { | |
4916 | brelse(bh); | |
4917 | goto out; | |
ac27a0ec | 4918 | } |
67eeb568 DM |
4919 | lock_buffer(bh); |
4920 | memcpy(bh->b_data+offset, data, len); | |
4921 | flush_dcache_page(bh->b_page); | |
4922 | unlock_buffer(bh); | |
62d2b5f2 | 4923 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4924 | brelse(bh); |
ac27a0ec | 4925 | out: |
67eeb568 | 4926 | if (err) { |
4d04e4fb | 4927 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4928 | return err; |
4d04e4fb | 4929 | } |
67eeb568 DM |
4930 | if (inode->i_size < off + len) { |
4931 | i_size_write(inode, off + len); | |
617ba13b | 4932 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 4933 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4934 | } |
ac27a0ec | 4935 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4936 | return len; |
ac27a0ec DK |
4937 | } |
4938 | ||
4939 | #endif | |
4940 | ||
152a0836 AV |
4941 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4942 | const char *dev_name, void *data) | |
ac27a0ec | 4943 | { |
152a0836 | 4944 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4945 | } |
4946 | ||
37f328eb | 4947 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4948 | static inline void register_as_ext2(void) |
4949 | { | |
4950 | int err = register_filesystem(&ext2_fs_type); | |
4951 | if (err) | |
4952 | printk(KERN_WARNING | |
4953 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4954 | } | |
4955 | ||
4956 | static inline void unregister_as_ext2(void) | |
4957 | { | |
4958 | unregister_filesystem(&ext2_fs_type); | |
4959 | } | |
2035e776 TT |
4960 | |
4961 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
4962 | { | |
4963 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
4964 | return 0; | |
4965 | if (sb->s_flags & MS_RDONLY) | |
4966 | return 1; | |
4967 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
4968 | return 0; | |
4969 | return 1; | |
4970 | } | |
51b7e3c9 | 4971 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4972 | #else |
4973 | static inline void register_as_ext2(void) { } | |
4974 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 4975 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4976 | #endif |
4977 | ||
37f328eb | 4978 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4979 | static inline void register_as_ext3(void) |
4980 | { | |
4981 | int err = register_filesystem(&ext3_fs_type); | |
4982 | if (err) | |
4983 | printk(KERN_WARNING | |
4984 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4985 | } | |
4986 | ||
4987 | static inline void unregister_as_ext3(void) | |
4988 | { | |
4989 | unregister_filesystem(&ext3_fs_type); | |
4990 | } | |
2035e776 TT |
4991 | |
4992 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
4993 | { | |
4994 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
4995 | return 0; | |
4996 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
4997 | return 0; | |
4998 | if (sb->s_flags & MS_RDONLY) | |
4999 | return 1; | |
5000 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5001 | return 0; | |
5002 | return 1; | |
5003 | } | |
51b7e3c9 | 5004 | MODULE_ALIAS("ext3"); |
24b58424 TT |
5005 | #else |
5006 | static inline void register_as_ext3(void) { } | |
5007 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5008 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5009 | #endif |
5010 | ||
03010a33 TT |
5011 | static struct file_system_type ext4_fs_type = { |
5012 | .owner = THIS_MODULE, | |
5013 | .name = "ext4", | |
152a0836 | 5014 | .mount = ext4_mount, |
03010a33 TT |
5015 | .kill_sb = kill_block_super, |
5016 | .fs_flags = FS_REQUIRES_DEV, | |
5017 | }; | |
5018 | ||
8f021222 | 5019 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5020 | { |
5021 | struct ext4_features *ef; | |
5022 | int ret = -ENOMEM; | |
5023 | ||
5024 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5025 | if (!ef) | |
5026 | goto out; | |
5027 | ||
5028 | ef->f_kobj.kset = ext4_kset; | |
5029 | init_completion(&ef->f_kobj_unregister); | |
5030 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5031 | "features"); | |
5032 | if (ret) { | |
5033 | kfree(ef); | |
5034 | goto out; | |
5035 | } | |
5036 | ||
5037 | ext4_feat = ef; | |
5038 | ret = 0; | |
5039 | out: | |
5040 | return ret; | |
5041 | } | |
5042 | ||
8f021222 LC |
5043 | static void ext4_exit_feat_adverts(void) |
5044 | { | |
5045 | kobject_put(&ext4_feat->f_kobj); | |
5046 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5047 | kfree(ext4_feat); | |
5048 | } | |
5049 | ||
e9e3bcec ES |
5050 | /* Shared across all ext4 file systems */ |
5051 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5052 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5053 | ||
5dabfc78 | 5054 | static int __init ext4_init_fs(void) |
ac27a0ec | 5055 | { |
e9e3bcec | 5056 | int i, err; |
c9de560d | 5057 | |
12e9b892 | 5058 | ext4_check_flag_values(); |
e9e3bcec ES |
5059 | |
5060 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5061 | mutex_init(&ext4__aio_mutex[i]); | |
5062 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5063 | } | |
5064 | ||
5dabfc78 | 5065 | err = ext4_init_pageio(); |
6fd058f7 TT |
5066 | if (err) |
5067 | return err; | |
5dabfc78 | 5068 | err = ext4_init_system_zone(); |
bd2d0210 | 5069 | if (err) |
d44651d0 | 5070 | goto out6; |
3197ebdb TT |
5071 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
5072 | if (!ext4_kset) | |
dd68314c | 5073 | goto out5; |
d44651d0 | 5074 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5075 | |
5076 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5077 | if (err) |
5078 | goto out4; | |
857ac889 | 5079 | |
5dabfc78 | 5080 | err = ext4_init_mballoc(); |
ac27a0ec | 5081 | if (err) |
6fd058f7 | 5082 | goto out3; |
c9de560d | 5083 | |
5dabfc78 | 5084 | err = ext4_init_xattr(); |
c9de560d AT |
5085 | if (err) |
5086 | goto out2; | |
ac27a0ec DK |
5087 | err = init_inodecache(); |
5088 | if (err) | |
5089 | goto out1; | |
24b58424 | 5090 | register_as_ext3(); |
2035e776 | 5091 | register_as_ext2(); |
03010a33 | 5092 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5093 | if (err) |
5094 | goto out; | |
bfff6873 LC |
5095 | |
5096 | ext4_li_info = NULL; | |
5097 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
5098 | return 0; |
5099 | out: | |
24b58424 TT |
5100 | unregister_as_ext2(); |
5101 | unregister_as_ext3(); | |
ac27a0ec DK |
5102 | destroy_inodecache(); |
5103 | out1: | |
5dabfc78 | 5104 | ext4_exit_xattr(); |
c9de560d | 5105 | out2: |
5dabfc78 | 5106 | ext4_exit_mballoc(); |
6fd058f7 | 5107 | out3: |
8f021222 | 5108 | ext4_exit_feat_adverts(); |
dd68314c | 5109 | out4: |
d44651d0 FJ |
5110 | if (ext4_proc_root) |
5111 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5112 | kset_unregister(ext4_kset); |
d44651d0 | 5113 | out5: |
5dabfc78 | 5114 | ext4_exit_system_zone(); |
d44651d0 | 5115 | out6: |
5dabfc78 | 5116 | ext4_exit_pageio(); |
ac27a0ec DK |
5117 | return err; |
5118 | } | |
5119 | ||
5dabfc78 | 5120 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5121 | { |
bfff6873 | 5122 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5123 | unregister_as_ext2(); |
5124 | unregister_as_ext3(); | |
03010a33 | 5125 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5126 | destroy_inodecache(); |
5dabfc78 TT |
5127 | ext4_exit_xattr(); |
5128 | ext4_exit_mballoc(); | |
8f021222 | 5129 | ext4_exit_feat_adverts(); |
9f6200bb | 5130 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5131 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5132 | ext4_exit_system_zone(); |
5133 | ext4_exit_pageio(); | |
ac27a0ec DK |
5134 | } |
5135 | ||
5136 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5137 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5138 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5139 | module_init(ext4_init_fs) |
5140 | module_exit(ext4_exit_fs) |