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); |
2adf6da8 | 65 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 66 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
67 | static void ext4_mark_recovery_complete(struct super_block *sb, |
68 | struct ext4_super_block *es); | |
69 | static void ext4_clear_journal_err(struct super_block *sb, | |
70 | struct ext4_super_block *es); | |
617ba13b | 71 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 72 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 73 | char nbuf[16]); |
2b2d6d01 TT |
74 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
75 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 76 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 77 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 78 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
79 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
80 | const char *dev_name, void *data); | |
2035e776 TT |
81 | static inline int ext2_feature_set_ok(struct super_block *sb); |
82 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 83 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
84 | static void ext4_destroy_lazyinit_thread(void); |
85 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 86 | static void ext4_clear_request_list(void); |
ac27a0ec | 87 | |
2035e776 TT |
88 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
89 | static struct file_system_type ext2_fs_type = { | |
90 | .owner = THIS_MODULE, | |
91 | .name = "ext2", | |
92 | .mount = ext4_mount, | |
93 | .kill_sb = kill_block_super, | |
94 | .fs_flags = FS_REQUIRES_DEV, | |
95 | }; | |
96 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) | |
97 | #else | |
98 | #define IS_EXT2_SB(sb) (0) | |
99 | #endif | |
100 | ||
101 | ||
ba69f9ab JK |
102 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
103 | static struct file_system_type ext3_fs_type = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = "ext3", | |
152a0836 | 106 | .mount = ext4_mount, |
ba69f9ab JK |
107 | .kill_sb = kill_block_super, |
108 | .fs_flags = FS_REQUIRES_DEV, | |
109 | }; | |
110 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
111 | #else | |
112 | #define IS_EXT3_SB(sb) (0) | |
113 | #endif | |
bd81d8ee | 114 | |
d25425f8 DW |
115 | static int ext4_verify_csum_type(struct super_block *sb, |
116 | struct ext4_super_block *es) | |
117 | { | |
118 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
119 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
120 | return 1; | |
121 | ||
122 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
123 | } | |
124 | ||
a9c47317 DW |
125 | static __le32 ext4_superblock_csum(struct super_block *sb, |
126 | struct ext4_super_block *es) | |
127 | { | |
128 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
129 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
130 | __u32 csum; | |
131 | ||
132 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
133 | ||
134 | return cpu_to_le32(csum); | |
135 | } | |
136 | ||
137 | int ext4_superblock_csum_verify(struct super_block *sb, | |
138 | struct ext4_super_block *es) | |
139 | { | |
140 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
141 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
142 | return 1; | |
143 | ||
144 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
145 | } | |
146 | ||
147 | void ext4_superblock_csum_set(struct super_block *sb, | |
148 | struct ext4_super_block *es) | |
149 | { | |
150 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
151 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
152 | return; | |
153 | ||
154 | es->s_checksum = ext4_superblock_csum(sb, es); | |
155 | } | |
156 | ||
9933fc0a TT |
157 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
158 | { | |
159 | void *ret; | |
160 | ||
161 | ret = kmalloc(size, flags); | |
162 | if (!ret) | |
163 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
164 | return ret; | |
165 | } | |
166 | ||
167 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
168 | { | |
169 | void *ret; | |
170 | ||
db9481c0 | 171 | ret = kzalloc(size, flags); |
9933fc0a TT |
172 | if (!ret) |
173 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
174 | return ret; | |
175 | } | |
176 | ||
177 | void ext4_kvfree(void *ptr) | |
178 | { | |
179 | if (is_vmalloc_addr(ptr)) | |
180 | vfree(ptr); | |
181 | else | |
182 | kfree(ptr); | |
183 | ||
184 | } | |
185 | ||
8fadc143 AR |
186 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
187 | struct ext4_group_desc *bg) | |
bd81d8ee | 188 | { |
3a14589c | 189 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 190 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 191 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
192 | } |
193 | ||
8fadc143 AR |
194 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
195 | struct ext4_group_desc *bg) | |
bd81d8ee | 196 | { |
5272f837 | 197 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 198 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 199 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
200 | } |
201 | ||
8fadc143 AR |
202 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
203 | struct ext4_group_desc *bg) | |
bd81d8ee | 204 | { |
5272f837 | 205 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 206 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 207 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
208 | } |
209 | ||
021b65bb TT |
210 | __u32 ext4_free_group_clusters(struct super_block *sb, |
211 | struct ext4_group_desc *bg) | |
560671a0 AK |
212 | { |
213 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
214 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 215 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
216 | } |
217 | ||
218 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
219 | struct ext4_group_desc *bg) | |
220 | { | |
221 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
222 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 223 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
224 | } |
225 | ||
226 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
227 | struct ext4_group_desc *bg) | |
228 | { | |
229 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
230 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 231 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
232 | } |
233 | ||
234 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
235 | struct ext4_group_desc *bg) | |
236 | { | |
237 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
238 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 239 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
240 | } |
241 | ||
8fadc143 AR |
242 | void ext4_block_bitmap_set(struct super_block *sb, |
243 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 244 | { |
3a14589c | 245 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
246 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
247 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
248 | } |
249 | ||
8fadc143 AR |
250 | void ext4_inode_bitmap_set(struct super_block *sb, |
251 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 252 | { |
5272f837 | 253 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
254 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
255 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
256 | } |
257 | ||
8fadc143 AR |
258 | void ext4_inode_table_set(struct super_block *sb, |
259 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 260 | { |
5272f837 | 261 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
262 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
263 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
264 | } |
265 | ||
021b65bb TT |
266 | void ext4_free_group_clusters_set(struct super_block *sb, |
267 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
268 | { |
269 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
270 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
271 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
272 | } | |
273 | ||
274 | void ext4_free_inodes_set(struct super_block *sb, | |
275 | struct ext4_group_desc *bg, __u32 count) | |
276 | { | |
277 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
278 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
279 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
280 | } | |
281 | ||
282 | void ext4_used_dirs_set(struct super_block *sb, | |
283 | struct ext4_group_desc *bg, __u32 count) | |
284 | { | |
285 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
286 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
287 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
288 | } | |
289 | ||
290 | void ext4_itable_unused_set(struct super_block *sb, | |
291 | struct ext4_group_desc *bg, __u32 count) | |
292 | { | |
293 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
294 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
295 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
296 | } | |
297 | ||
d3d1faf6 CW |
298 | |
299 | /* Just increment the non-pointer handle value */ | |
300 | static handle_t *ext4_get_nojournal(void) | |
301 | { | |
302 | handle_t *handle = current->journal_info; | |
303 | unsigned long ref_cnt = (unsigned long)handle; | |
304 | ||
305 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
306 | ||
307 | ref_cnt++; | |
308 | handle = (handle_t *)ref_cnt; | |
309 | ||
310 | current->journal_info = handle; | |
311 | return handle; | |
312 | } | |
313 | ||
314 | ||
315 | /* Decrement the non-pointer handle value */ | |
316 | static void ext4_put_nojournal(handle_t *handle) | |
317 | { | |
318 | unsigned long ref_cnt = (unsigned long)handle; | |
319 | ||
320 | BUG_ON(ref_cnt == 0); | |
321 | ||
322 | ref_cnt--; | |
323 | handle = (handle_t *)ref_cnt; | |
324 | ||
325 | current->journal_info = handle; | |
326 | } | |
327 | ||
ac27a0ec | 328 | /* |
dab291af | 329 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
330 | * |
331 | * The only special thing we need to do here is to make sure that all | |
332 | * journal_end calls result in the superblock being marked dirty, so | |
333 | * that sync() will call the filesystem's write_super callback if | |
334 | * appropriate. | |
be4f27d3 YY |
335 | * |
336 | * To avoid j_barrier hold in userspace when a user calls freeze(), | |
337 | * ext4 prevents a new handle from being started by s_frozen, which | |
338 | * is in an upper layer. | |
ac27a0ec | 339 | */ |
617ba13b | 340 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
341 | { |
342 | journal_t *journal; | |
be4f27d3 | 343 | handle_t *handle; |
ac27a0ec | 344 | |
12706394 | 345 | trace_ext4_journal_start(sb, nblocks, _RET_IP_); |
ac27a0ec DK |
346 | if (sb->s_flags & MS_RDONLY) |
347 | return ERR_PTR(-EROFS); | |
348 | ||
617ba13b | 349 | journal = EXT4_SB(sb)->s_journal; |
be4f27d3 YY |
350 | handle = ext4_journal_current_handle(); |
351 | ||
352 | /* | |
353 | * If a handle has been started, it should be allowed to | |
354 | * finish, otherwise deadlock could happen between freeze | |
355 | * and others(e.g. truncate) due to the restart of the | |
356 | * journal handle if the filesystem is forzen and active | |
357 | * handles are not stopped. | |
358 | */ | |
359 | if (!handle) | |
360 | vfs_check_frozen(sb, SB_FREEZE_TRANS); | |
361 | ||
362 | if (!journal) | |
363 | return ext4_get_nojournal(); | |
364 | /* | |
365 | * Special case here: if the journal has aborted behind our | |
366 | * backs (eg. EIO in the commit thread), then we still need to | |
367 | * take the FS itself readonly cleanly. | |
368 | */ | |
369 | if (is_journal_aborted(journal)) { | |
370 | ext4_abort(sb, "Detected aborted journal"); | |
371 | return ERR_PTR(-EROFS); | |
ac27a0ec | 372 | } |
be4f27d3 | 373 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
374 | } |
375 | ||
376 | /* | |
377 | * The only special thing we need to do here is to make sure that all | |
dab291af | 378 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
379 | * that sync() will call the filesystem's write_super callback if |
380 | * appropriate. | |
381 | */ | |
c398eda0 | 382 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
383 | { |
384 | struct super_block *sb; | |
385 | int err; | |
386 | int rc; | |
387 | ||
0390131b | 388 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 389 | ext4_put_nojournal(handle); |
0390131b FM |
390 | return 0; |
391 | } | |
ac27a0ec DK |
392 | sb = handle->h_transaction->t_journal->j_private; |
393 | err = handle->h_err; | |
dab291af | 394 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
395 | |
396 | if (!err) | |
397 | err = rc; | |
398 | if (err) | |
c398eda0 | 399 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
400 | return err; |
401 | } | |
402 | ||
90c7201b TT |
403 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
404 | const char *err_fn, struct buffer_head *bh, | |
405 | handle_t *handle, int err) | |
ac27a0ec DK |
406 | { |
407 | char nbuf[16]; | |
617ba13b | 408 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 409 | |
0390131b FM |
410 | BUG_ON(!ext4_handle_valid(handle)); |
411 | ||
ac27a0ec DK |
412 | if (bh) |
413 | BUFFER_TRACE(bh, "abort"); | |
414 | ||
415 | if (!handle->h_err) | |
416 | handle->h_err = err; | |
417 | ||
418 | if (is_handle_aborted(handle)) | |
419 | return; | |
420 | ||
92b97816 | 421 | printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", |
90c7201b | 422 | caller, line, errstr, err_fn); |
ac27a0ec | 423 | |
dab291af | 424 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
425 | } |
426 | ||
1c13d5c0 TT |
427 | static void __save_error_info(struct super_block *sb, const char *func, |
428 | unsigned int line) | |
429 | { | |
430 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
431 | ||
432 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
433 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
434 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
435 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
436 | es->s_last_error_line = cpu_to_le32(line); | |
437 | if (!es->s_first_error_time) { | |
438 | es->s_first_error_time = es->s_last_error_time; | |
439 | strncpy(es->s_first_error_func, func, | |
440 | sizeof(es->s_first_error_func)); | |
441 | es->s_first_error_line = cpu_to_le32(line); | |
442 | es->s_first_error_ino = es->s_last_error_ino; | |
443 | es->s_first_error_block = es->s_last_error_block; | |
444 | } | |
66e61a9e TT |
445 | /* |
446 | * Start the daily error reporting function if it hasn't been | |
447 | * started already | |
448 | */ | |
449 | if (!es->s_error_count) | |
450 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
451 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
452 | } | |
453 | ||
454 | static void save_error_info(struct super_block *sb, const char *func, | |
455 | unsigned int line) | |
456 | { | |
457 | __save_error_info(sb, func, line); | |
458 | ext4_commit_super(sb, 1); | |
459 | } | |
460 | ||
7c2e7087 TT |
461 | /* |
462 | * The del_gendisk() function uninitializes the disk-specific data | |
463 | * structures, including the bdi structure, without telling anyone | |
464 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
465 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
466 | * This is a kludge to prevent these oops until we can put in a proper | |
467 | * hook in del_gendisk() to inform the VFS and file system layers. | |
468 | */ | |
469 | static int block_device_ejected(struct super_block *sb) | |
470 | { | |
471 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
472 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; | |
473 | ||
474 | return bdi->dev == NULL; | |
475 | } | |
476 | ||
18aadd47 BJ |
477 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
478 | { | |
479 | struct super_block *sb = journal->j_private; | |
480 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
481 | int error = is_journal_aborted(journal); | |
482 | struct ext4_journal_cb_entry *jce, *tmp; | |
483 | ||
484 | spin_lock(&sbi->s_md_lock); | |
485 | list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { | |
486 | list_del_init(&jce->jce_list); | |
487 | spin_unlock(&sbi->s_md_lock); | |
488 | jce->jce_func(sb, jce, error); | |
489 | spin_lock(&sbi->s_md_lock); | |
490 | } | |
491 | spin_unlock(&sbi->s_md_lock); | |
492 | } | |
1c13d5c0 | 493 | |
ac27a0ec DK |
494 | /* Deal with the reporting of failure conditions on a filesystem such as |
495 | * inconsistencies detected or read IO failures. | |
496 | * | |
497 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 498 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
499 | * write ordering constraints on the superblock which prevent us from |
500 | * writing it out straight away; and given that the journal is about to | |
501 | * be aborted, we can't rely on the current, or future, transactions to | |
502 | * write out the superblock safely. | |
503 | * | |
dab291af | 504 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 505 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
506 | * that error until we've noted it down and cleared it. |
507 | */ | |
508 | ||
617ba13b | 509 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 510 | { |
ac27a0ec DK |
511 | if (sb->s_flags & MS_RDONLY) |
512 | return; | |
513 | ||
2b2d6d01 | 514 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 515 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 516 | |
4ab2f15b | 517 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 518 | if (journal) |
dab291af | 519 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 520 | } |
2b2d6d01 | 521 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 522 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
523 | sb->s_flags |= MS_RDONLY; |
524 | } | |
ac27a0ec | 525 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 526 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
527 | sb->s_id); |
528 | } | |
529 | ||
12062ddd | 530 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 531 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 532 | { |
0ff2ea7d | 533 | struct va_format vaf; |
ac27a0ec DK |
534 | va_list args; |
535 | ||
536 | va_start(args, fmt); | |
0ff2ea7d JP |
537 | vaf.fmt = fmt; |
538 | vaf.va = &args; | |
539 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
540 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec | 541 | va_end(args); |
f3fc0210 | 542 | save_error_info(sb, function, line); |
ac27a0ec | 543 | |
617ba13b | 544 | ext4_handle_error(sb); |
ac27a0ec DK |
545 | } |
546 | ||
c398eda0 TT |
547 | void ext4_error_inode(struct inode *inode, const char *function, |
548 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
549 | const char *fmt, ...) |
550 | { | |
551 | va_list args; | |
f7c21177 | 552 | struct va_format vaf; |
1c13d5c0 | 553 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 554 | |
1c13d5c0 TT |
555 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
556 | es->s_last_error_block = cpu_to_le64(block); | |
557 | save_error_info(inode->i_sb, function, line); | |
273df556 | 558 | va_start(args, fmt); |
f7c21177 TT |
559 | vaf.fmt = fmt; |
560 | vaf.va = &args; | |
c398eda0 | 561 | if (block) |
d9ee81da JP |
562 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
563 | "inode #%lu: block %llu: comm %s: %pV\n", | |
564 | inode->i_sb->s_id, function, line, inode->i_ino, | |
565 | block, current->comm, &vaf); | |
566 | else | |
567 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
568 | "inode #%lu: comm %s: %pV\n", | |
569 | inode->i_sb->s_id, function, line, inode->i_ino, | |
570 | current->comm, &vaf); | |
273df556 FM |
571 | va_end(args); |
572 | ||
573 | ext4_handle_error(inode->i_sb); | |
574 | } | |
575 | ||
c398eda0 | 576 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
577 | unsigned int line, ext4_fsblk_t block, |
578 | const char *fmt, ...) | |
273df556 FM |
579 | { |
580 | va_list args; | |
f7c21177 | 581 | struct va_format vaf; |
1c13d5c0 | 582 | struct ext4_super_block *es; |
273df556 FM |
583 | struct inode *inode = file->f_dentry->d_inode; |
584 | char pathname[80], *path; | |
585 | ||
1c13d5c0 TT |
586 | es = EXT4_SB(inode->i_sb)->s_es; |
587 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
588 | save_error_info(inode->i_sb, function, line); | |
273df556 | 589 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 590 | if (IS_ERR(path)) |
273df556 | 591 | path = "(unknown)"; |
f7c21177 TT |
592 | va_start(args, fmt); |
593 | vaf.fmt = fmt; | |
594 | vaf.va = &args; | |
d9ee81da JP |
595 | if (block) |
596 | printk(KERN_CRIT | |
597 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
598 | "block %llu: comm %s: path %s: %pV\n", | |
599 | inode->i_sb->s_id, function, line, inode->i_ino, | |
600 | block, current->comm, path, &vaf); | |
601 | else | |
602 | printk(KERN_CRIT | |
603 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
604 | "comm %s: path %s: %pV\n", | |
605 | inode->i_sb->s_id, function, line, inode->i_ino, | |
606 | current->comm, path, &vaf); | |
273df556 FM |
607 | va_end(args); |
608 | ||
609 | ext4_handle_error(inode->i_sb); | |
610 | } | |
611 | ||
2b2d6d01 | 612 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
613 | char nbuf[16]) |
614 | { | |
615 | char *errstr = NULL; | |
616 | ||
617 | switch (errno) { | |
618 | case -EIO: | |
619 | errstr = "IO failure"; | |
620 | break; | |
621 | case -ENOMEM: | |
622 | errstr = "Out of memory"; | |
623 | break; | |
624 | case -EROFS: | |
78f1ddbb TT |
625 | if (!sb || (EXT4_SB(sb)->s_journal && |
626 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
627 | errstr = "Journal has aborted"; |
628 | else | |
629 | errstr = "Readonly filesystem"; | |
630 | break; | |
631 | default: | |
632 | /* If the caller passed in an extra buffer for unknown | |
633 | * errors, textualise them now. Else we just return | |
634 | * NULL. */ | |
635 | if (nbuf) { | |
636 | /* Check for truncated error codes... */ | |
637 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
638 | errstr = nbuf; | |
639 | } | |
640 | break; | |
641 | } | |
642 | ||
643 | return errstr; | |
644 | } | |
645 | ||
617ba13b | 646 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
647 | * automatically and invokes the appropriate error response. */ |
648 | ||
c398eda0 TT |
649 | void __ext4_std_error(struct super_block *sb, const char *function, |
650 | unsigned int line, int errno) | |
ac27a0ec DK |
651 | { |
652 | char nbuf[16]; | |
653 | const char *errstr; | |
654 | ||
655 | /* Special case: if the error is EROFS, and we're not already | |
656 | * inside a transaction, then there's really no point in logging | |
657 | * an error. */ | |
658 | if (errno == -EROFS && journal_current_handle() == NULL && | |
659 | (sb->s_flags & MS_RDONLY)) | |
660 | return; | |
661 | ||
617ba13b | 662 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
663 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
664 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 665 | save_error_info(sb, function, line); |
ac27a0ec | 666 | |
617ba13b | 667 | ext4_handle_error(sb); |
ac27a0ec DK |
668 | } |
669 | ||
670 | /* | |
617ba13b | 671 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
672 | * abort function may be used to deal with unrecoverable failures such |
673 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
674 | * | |
675 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
676 | * unless the error response on the fs has been set to panic in which | |
677 | * case we take the easy way out and panic immediately. | |
678 | */ | |
679 | ||
c67d859e | 680 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 681 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
682 | { |
683 | va_list args; | |
684 | ||
1c13d5c0 | 685 | save_error_info(sb, function, line); |
ac27a0ec | 686 | va_start(args, fmt); |
c398eda0 TT |
687 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
688 | function, line); | |
ac27a0ec DK |
689 | vprintk(fmt, args); |
690 | printk("\n"); | |
691 | va_end(args); | |
692 | ||
1c13d5c0 TT |
693 | if ((sb->s_flags & MS_RDONLY) == 0) { |
694 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
695 | sb->s_flags |= MS_RDONLY; | |
696 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
697 | if (EXT4_SB(sb)->s_journal) | |
698 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
699 | save_error_info(sb, function, line); | |
700 | } | |
ac27a0ec | 701 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 702 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
703 | } |
704 | ||
0ff2ea7d | 705 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 706 | { |
0ff2ea7d | 707 | struct va_format vaf; |
b31e1552 ES |
708 | va_list args; |
709 | ||
710 | va_start(args, fmt); | |
0ff2ea7d JP |
711 | vaf.fmt = fmt; |
712 | vaf.va = &args; | |
713 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
714 | va_end(args); |
715 | } | |
716 | ||
12062ddd | 717 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 718 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 719 | { |
0ff2ea7d | 720 | struct va_format vaf; |
ac27a0ec DK |
721 | va_list args; |
722 | ||
723 | va_start(args, fmt); | |
0ff2ea7d JP |
724 | vaf.fmt = fmt; |
725 | vaf.va = &args; | |
726 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
727 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
728 | va_end(args); |
729 | } | |
730 | ||
e29136f8 TT |
731 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
732 | struct super_block *sb, ext4_group_t grp, | |
733 | unsigned long ino, ext4_fsblk_t block, | |
734 | const char *fmt, ...) | |
5d1b1b3f AK |
735 | __releases(bitlock) |
736 | __acquires(bitlock) | |
737 | { | |
0ff2ea7d | 738 | struct va_format vaf; |
5d1b1b3f AK |
739 | va_list args; |
740 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
741 | ||
1c13d5c0 TT |
742 | es->s_last_error_ino = cpu_to_le32(ino); |
743 | es->s_last_error_block = cpu_to_le64(block); | |
744 | __save_error_info(sb, function, line); | |
0ff2ea7d | 745 | |
5d1b1b3f | 746 | va_start(args, fmt); |
0ff2ea7d JP |
747 | |
748 | vaf.fmt = fmt; | |
749 | vaf.va = &args; | |
21149d61 | 750 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
751 | sb->s_id, function, line, grp); |
752 | if (ino) | |
0ff2ea7d | 753 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 754 | if (block) |
0ff2ea7d JP |
755 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
756 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
757 | va_end(args); |
758 | ||
759 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 760 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
761 | return; |
762 | } | |
1c13d5c0 | 763 | |
5d1b1b3f AK |
764 | ext4_unlock_group(sb, grp); |
765 | ext4_handle_error(sb); | |
766 | /* | |
767 | * We only get here in the ERRORS_RO case; relocking the group | |
768 | * may be dangerous, but nothing bad will happen since the | |
769 | * filesystem will have already been marked read/only and the | |
770 | * journal has been aborted. We return 1 as a hint to callers | |
771 | * who might what to use the return value from | |
25985edc | 772 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
773 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
774 | * aggressively from the ext4 function in question, with a | |
775 | * more appropriate error code. | |
776 | */ | |
777 | ext4_lock_group(sb, grp); | |
778 | return; | |
779 | } | |
780 | ||
617ba13b | 781 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 782 | { |
617ba13b | 783 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 784 | |
617ba13b | 785 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
786 | return; |
787 | ||
12062ddd | 788 | ext4_warning(sb, |
ac27a0ec DK |
789 | "updating to rev %d because of new feature flag, " |
790 | "running e2fsck is recommended", | |
617ba13b | 791 | EXT4_DYNAMIC_REV); |
ac27a0ec | 792 | |
617ba13b MC |
793 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
794 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
795 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
796 | /* leave es->s_feature_*compat flags alone */ |
797 | /* es->s_uuid will be set by e2fsck if empty */ | |
798 | ||
799 | /* | |
800 | * The rest of the superblock fields should be zero, and if not it | |
801 | * means they are likely already in use, so leave them alone. We | |
802 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
803 | */ | |
804 | } | |
805 | ||
806 | /* | |
807 | * Open the external journal device | |
808 | */ | |
b31e1552 | 809 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
810 | { |
811 | struct block_device *bdev; | |
812 | char b[BDEVNAME_SIZE]; | |
813 | ||
d4d77629 | 814 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
815 | if (IS_ERR(bdev)) |
816 | goto fail; | |
817 | return bdev; | |
818 | ||
819 | fail: | |
b31e1552 | 820 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
821 | __bdevname(dev, b), PTR_ERR(bdev)); |
822 | return NULL; | |
823 | } | |
824 | ||
825 | /* | |
826 | * Release the journal device | |
827 | */ | |
617ba13b | 828 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 829 | { |
e525fd89 | 830 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
831 | } |
832 | ||
617ba13b | 833 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
834 | { |
835 | struct block_device *bdev; | |
836 | int ret = -ENODEV; | |
837 | ||
838 | bdev = sbi->journal_bdev; | |
839 | if (bdev) { | |
617ba13b | 840 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
841 | sbi->journal_bdev = NULL; |
842 | } | |
843 | return ret; | |
844 | } | |
845 | ||
846 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
847 | { | |
617ba13b | 848 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
849 | } |
850 | ||
617ba13b | 851 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
852 | { |
853 | struct list_head *l; | |
854 | ||
b31e1552 ES |
855 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
856 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
857 | |
858 | printk(KERN_ERR "sb_info orphan list:\n"); | |
859 | list_for_each(l, &sbi->s_orphan) { | |
860 | struct inode *inode = orphan_list_entry(l); | |
861 | printk(KERN_ERR " " | |
862 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
863 | inode->i_sb->s_id, inode->i_ino, inode, | |
864 | inode->i_mode, inode->i_nlink, | |
865 | NEXT_ORPHAN(inode)); | |
866 | } | |
867 | } | |
868 | ||
2b2d6d01 | 869 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 870 | { |
617ba13b MC |
871 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
872 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 873 | int i, err; |
ac27a0ec | 874 | |
857ac889 | 875 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
876 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
877 | ||
4c0425ff MC |
878 | flush_workqueue(sbi->dio_unwritten_wq); |
879 | destroy_workqueue(sbi->dio_unwritten_wq); | |
880 | ||
a9e220f8 | 881 | lock_super(sb); |
0390131b FM |
882 | if (sbi->s_journal) { |
883 | err = jbd2_journal_destroy(sbi->s_journal); | |
884 | sbi->s_journal = NULL; | |
885 | if (err < 0) | |
c67d859e | 886 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 887 | } |
d4edac31 | 888 | |
a1c6c569 | 889 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
890 | ext4_release_system_zone(sb); |
891 | ext4_mb_release(sb); | |
892 | ext4_ext_release(sb); | |
893 | ext4_xattr_put_super(sb); | |
894 | ||
ac27a0ec | 895 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 896 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 897 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 898 | } |
a8e25a83 AB |
899 | if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) |
900 | ext4_commit_super(sb, 1); | |
901 | ||
240799cd | 902 | if (sbi->s_proc) { |
66acdcf4 | 903 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 904 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 905 | } |
3197ebdb | 906 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
907 | |
908 | for (i = 0; i < sbi->s_gdb_count; i++) | |
909 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 910 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 911 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 912 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
913 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
914 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 915 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
916 | brelse(sbi->s_sbh); |
917 | #ifdef CONFIG_QUOTA | |
918 | for (i = 0; i < MAXQUOTAS; i++) | |
919 | kfree(sbi->s_qf_names[i]); | |
920 | #endif | |
921 | ||
922 | /* Debugging code just in case the in-memory inode orphan list | |
923 | * isn't empty. The on-disk one can be non-empty if we've | |
924 | * detected an error and taken the fs readonly, but the | |
925 | * in-memory list had better be clean by this point. */ | |
926 | if (!list_empty(&sbi->s_orphan)) | |
927 | dump_orphan_list(sb, sbi); | |
928 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
929 | ||
f98393a6 | 930 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
931 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
932 | /* | |
933 | * Invalidate the journal device's buffers. We don't want them | |
934 | * floating about in memory - the physical journal device may | |
935 | * hotswapped, and it breaks the `ro-after' testing code. | |
936 | */ | |
937 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 938 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 939 | ext4_blkdev_remove(sbi); |
ac27a0ec | 940 | } |
c5e06d10 JL |
941 | if (sbi->s_mmp_tsk) |
942 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 943 | sb->s_fs_info = NULL; |
3197ebdb TT |
944 | /* |
945 | * Now that we are completely done shutting down the | |
946 | * superblock, we need to actually destroy the kobject. | |
947 | */ | |
3197ebdb TT |
948 | unlock_super(sb); |
949 | kobject_put(&sbi->s_kobj); | |
950 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
951 | if (sbi->s_chksum_driver) |
952 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 953 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 954 | kfree(sbi); |
ac27a0ec DK |
955 | } |
956 | ||
e18b890b | 957 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
958 | |
959 | /* | |
960 | * Called inside transaction, so use GFP_NOFS | |
961 | */ | |
617ba13b | 962 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 963 | { |
617ba13b | 964 | struct ext4_inode_info *ei; |
ac27a0ec | 965 | |
e6b4f8da | 966 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
967 | if (!ei) |
968 | return NULL; | |
0b8e58a1 | 969 | |
ac27a0ec | 970 | ei->vfs_inode.i_version = 1; |
91246c00 | 971 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 972 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
973 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
974 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
975 | ei->i_reserved_data_blocks = 0; |
976 | ei->i_reserved_meta_blocks = 0; | |
977 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 978 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 979 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
980 | #ifdef CONFIG_QUOTA |
981 | ei->i_reserved_quota = 0; | |
982 | #endif | |
8aefcd55 | 983 | ei->jinode = NULL; |
c7064ef1 | 984 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 985 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 986 | ei->cur_aio_dio = NULL; |
b436b9be JK |
987 | ei->i_sync_tid = 0; |
988 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 989 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 990 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 991 | |
ac27a0ec DK |
992 | return &ei->vfs_inode; |
993 | } | |
994 | ||
7ff9c073 TT |
995 | static int ext4_drop_inode(struct inode *inode) |
996 | { | |
997 | int drop = generic_drop_inode(inode); | |
998 | ||
999 | trace_ext4_drop_inode(inode, drop); | |
1000 | return drop; | |
1001 | } | |
1002 | ||
fa0d7e3d NP |
1003 | static void ext4_i_callback(struct rcu_head *head) |
1004 | { | |
1005 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
1006 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
1007 | } | |
1008 | ||
617ba13b | 1009 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 1010 | { |
9f7dd93d | 1011 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
1012 | ext4_msg(inode->i_sb, KERN_ERR, |
1013 | "Inode %lu (%p): orphan list check failed!", | |
1014 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
1015 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
1016 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
1017 | true); | |
1018 | dump_stack(); | |
1019 | } | |
fa0d7e3d | 1020 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
1021 | } |
1022 | ||
51cc5068 | 1023 | static void init_once(void *foo) |
ac27a0ec | 1024 | { |
617ba13b | 1025 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 1026 | |
a35afb83 | 1027 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 1028 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 1029 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 1030 | #endif |
0e855ac8 | 1031 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 1032 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
1033 | } |
1034 | ||
1035 | static int init_inodecache(void) | |
1036 | { | |
617ba13b MC |
1037 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
1038 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
1039 | 0, (SLAB_RECLAIM_ACCOUNT| |
1040 | SLAB_MEM_SPREAD), | |
20c2df83 | 1041 | init_once); |
617ba13b | 1042 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1043 | return -ENOMEM; |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static void destroy_inodecache(void) | |
1048 | { | |
617ba13b | 1049 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1050 | } |
1051 | ||
0930fcc1 | 1052 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1053 | { |
0930fcc1 | 1054 | invalidate_inode_buffers(inode); |
dbd5768f | 1055 | clear_inode(inode); |
9f754758 | 1056 | dquot_drop(inode); |
c2ea3fde | 1057 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
1058 | if (EXT4_I(inode)->jinode) { |
1059 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1060 | EXT4_I(inode)->jinode); | |
1061 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1062 | EXT4_I(inode)->jinode = NULL; | |
1063 | } | |
ac27a0ec DK |
1064 | } |
1065 | ||
1b961ac0 | 1066 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1067 | u64 ino, u32 generation) |
ac27a0ec | 1068 | { |
ac27a0ec | 1069 | struct inode *inode; |
ac27a0ec | 1070 | |
617ba13b | 1071 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1072 | return ERR_PTR(-ESTALE); |
617ba13b | 1073 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1074 | return ERR_PTR(-ESTALE); |
1075 | ||
1076 | /* iget isn't really right if the inode is currently unallocated!! | |
1077 | * | |
617ba13b | 1078 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1079 | * deleted, so we should be safe. |
1080 | * | |
1081 | * Currently we don't know the generation for parent directory, so | |
1082 | * a generation of 0 means "accept any" | |
1083 | */ | |
1d1fe1ee DH |
1084 | inode = ext4_iget(sb, ino); |
1085 | if (IS_ERR(inode)) | |
1086 | return ERR_CAST(inode); | |
1087 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1088 | iput(inode); |
1089 | return ERR_PTR(-ESTALE); | |
1090 | } | |
1b961ac0 CH |
1091 | |
1092 | return inode; | |
1093 | } | |
1094 | ||
1095 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1096 | int fh_len, int fh_type) |
1b961ac0 CH |
1097 | { |
1098 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1099 | ext4_nfs_get_inode); | |
1100 | } | |
1101 | ||
1102 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1103 | int fh_len, int fh_type) |
1b961ac0 CH |
1104 | { |
1105 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1106 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1107 | } |
1108 | ||
c39a7f84 TO |
1109 | /* |
1110 | * Try to release metadata pages (indirect blocks, directories) which are | |
1111 | * mapped via the block device. Since these pages could have journal heads | |
1112 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1113 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1114 | */ | |
0b8e58a1 AD |
1115 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1116 | gfp_t wait) | |
c39a7f84 TO |
1117 | { |
1118 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1119 | ||
1120 | WARN_ON(PageChecked(page)); | |
1121 | if (!page_has_buffers(page)) | |
1122 | return 0; | |
1123 | if (journal) | |
1124 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1125 | wait & ~__GFP_WAIT); | |
1126 | return try_to_free_buffers(page); | |
1127 | } | |
1128 | ||
ac27a0ec | 1129 | #ifdef CONFIG_QUOTA |
af5bc92d | 1130 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1131 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1132 | |
617ba13b MC |
1133 | static int ext4_write_dquot(struct dquot *dquot); |
1134 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1135 | static int ext4_release_dquot(struct dquot *dquot); | |
1136 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1137 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1138 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1139 | struct path *path); |
7c319d32 AK |
1140 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, |
1141 | int format_id); | |
ca0e05e4 | 1142 | static int ext4_quota_off(struct super_block *sb, int type); |
7c319d32 | 1143 | static int ext4_quota_off_sysfile(struct super_block *sb, int type); |
617ba13b MC |
1144 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1145 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1146 | size_t len, loff_t off); |
617ba13b | 1147 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1148 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1149 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1150 | unsigned int flags); | |
1151 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1152 | |
61e225dc | 1153 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1154 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1155 | .write_dquot = ext4_write_dquot, |
1156 | .acquire_dquot = ext4_acquire_dquot, | |
1157 | .release_dquot = ext4_release_dquot, | |
1158 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1159 | .write_info = ext4_write_info, |
1160 | .alloc_dquot = dquot_alloc, | |
1161 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1162 | }; |
1163 | ||
0d54b217 | 1164 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1165 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1166 | .quota_off = ext4_quota_off, |
287a8095 CH |
1167 | .quota_sync = dquot_quota_sync, |
1168 | .get_info = dquot_get_dqinfo, | |
1169 | .set_info = dquot_set_dqinfo, | |
1170 | .get_dqblk = dquot_get_dqblk, | |
1171 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec | 1172 | }; |
7c319d32 AK |
1173 | |
1174 | static const struct quotactl_ops ext4_qctl_sysfile_operations = { | |
1175 | .quota_on_meta = ext4_quota_on_sysfile, | |
1176 | .quota_off = ext4_quota_off_sysfile, | |
1177 | .quota_sync = dquot_quota_sync, | |
1178 | .get_info = dquot_get_dqinfo, | |
1179 | .set_info = dquot_set_dqinfo, | |
1180 | .get_dqblk = dquot_get_dqblk, | |
1181 | .set_dqblk = dquot_set_dqblk | |
1182 | }; | |
ac27a0ec DK |
1183 | #endif |
1184 | ||
ee9b6d61 | 1185 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1186 | .alloc_inode = ext4_alloc_inode, |
1187 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1188 | .write_inode = ext4_write_inode, |
1189 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1190 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1191 | .evict_inode = ext4_evict_inode, |
617ba13b | 1192 | .put_super = ext4_put_super, |
617ba13b | 1193 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1194 | .freeze_fs = ext4_freeze, |
1195 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1196 | .statfs = ext4_statfs, |
1197 | .remount_fs = ext4_remount, | |
617ba13b | 1198 | .show_options = ext4_show_options, |
ac27a0ec | 1199 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1200 | .quota_read = ext4_quota_read, |
1201 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1202 | #endif |
c39a7f84 | 1203 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1204 | }; |
1205 | ||
9ca92389 TT |
1206 | static const struct super_operations ext4_nojournal_sops = { |
1207 | .alloc_inode = ext4_alloc_inode, | |
1208 | .destroy_inode = ext4_destroy_inode, | |
1209 | .write_inode = ext4_write_inode, | |
1210 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1211 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1212 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1213 | .write_super = ext4_write_super, |
1214 | .put_super = ext4_put_super, | |
1215 | .statfs = ext4_statfs, | |
1216 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1217 | .show_options = ext4_show_options, |
1218 | #ifdef CONFIG_QUOTA | |
1219 | .quota_read = ext4_quota_read, | |
1220 | .quota_write = ext4_quota_write, | |
1221 | #endif | |
1222 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1223 | }; | |
1224 | ||
39655164 | 1225 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1226 | .fh_to_dentry = ext4_fh_to_dentry, |
1227 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1228 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1229 | }; |
1230 | ||
1231 | enum { | |
1232 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1233 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1234 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1235 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1236 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
30773840 | 1237 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
43e625d8 | 1238 | Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1239 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1240 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1241 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1242 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1243 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
661aa520 | 1244 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
1449032b TT |
1245 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1246 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1247 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1248 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1249 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
ac27a0ec DK |
1250 | }; |
1251 | ||
a447c093 | 1252 | static const match_table_t tokens = { |
ac27a0ec DK |
1253 | {Opt_bsd_df, "bsddf"}, |
1254 | {Opt_minix_df, "minixdf"}, | |
1255 | {Opt_grpid, "grpid"}, | |
1256 | {Opt_grpid, "bsdgroups"}, | |
1257 | {Opt_nogrpid, "nogrpid"}, | |
1258 | {Opt_nogrpid, "sysvgroups"}, | |
1259 | {Opt_resgid, "resgid=%u"}, | |
1260 | {Opt_resuid, "resuid=%u"}, | |
1261 | {Opt_sb, "sb=%u"}, | |
1262 | {Opt_err_cont, "errors=continue"}, | |
1263 | {Opt_err_panic, "errors=panic"}, | |
1264 | {Opt_err_ro, "errors=remount-ro"}, | |
1265 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1266 | {Opt_debug, "debug"}, |
72578c33 TT |
1267 | {Opt_removed, "oldalloc"}, |
1268 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1269 | {Opt_user_xattr, "user_xattr"}, |
1270 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1271 | {Opt_acl, "acl"}, | |
1272 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1273 | {Opt_noload, "norecovery"}, |
5a916be1 | 1274 | {Opt_noload, "noload"}, |
72578c33 TT |
1275 | {Opt_removed, "nobh"}, |
1276 | {Opt_removed, "bh"}, | |
ac27a0ec | 1277 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1278 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1279 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1280 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1281 | {Opt_journal_checksum, "journal_checksum"}, |
1282 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1283 | {Opt_abort, "abort"}, |
1284 | {Opt_data_journal, "data=journal"}, | |
1285 | {Opt_data_ordered, "data=ordered"}, | |
1286 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1287 | {Opt_data_err_abort, "data_err=abort"}, |
1288 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1289 | {Opt_offusrjquota, "usrjquota="}, |
1290 | {Opt_usrjquota, "usrjquota=%s"}, | |
1291 | {Opt_offgrpjquota, "grpjquota="}, | |
1292 | {Opt_grpjquota, "grpjquota=%s"}, | |
1293 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1294 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1295 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1296 | {Opt_grpquota, "grpquota"}, |
1297 | {Opt_noquota, "noquota"}, | |
1298 | {Opt_quota, "quota"}, | |
1299 | {Opt_usrquota, "usrquota"}, | |
1300 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1301 | {Opt_barrier, "barrier"}, |
1302 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1303 | {Opt_i_version, "i_version"}, |
c9de560d | 1304 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1305 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1306 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1307 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1308 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1309 | {Opt_block_validity, "block_validity"}, |
1310 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1311 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1312 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1313 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1314 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1315 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1316 | {Opt_dioread_nolock, "dioread_nolock"}, |
1317 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1318 | {Opt_discard, "discard"}, |
1319 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1320 | {Opt_init_itable, "init_itable=%u"}, |
1321 | {Opt_init_itable, "init_itable"}, | |
1322 | {Opt_noinit_itable, "noinit_itable"}, | |
c7198b9c TT |
1323 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1324 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1325 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1326 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1327 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1328 | {Opt_err, NULL}, |
ac27a0ec DK |
1329 | }; |
1330 | ||
617ba13b | 1331 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1332 | { |
617ba13b | 1333 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1334 | char *options = (char *) *data; |
1335 | ||
1336 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1337 | return 1; /* Default location */ | |
0b8e58a1 | 1338 | |
ac27a0ec | 1339 | options += 3; |
0b8e58a1 | 1340 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1341 | sb_block = simple_strtoul(options, &options, 0); |
1342 | if (*options && *options != ',') { | |
4776004f | 1343 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1344 | (char *) *data); |
1345 | return 1; | |
1346 | } | |
1347 | if (*options == ',') | |
1348 | options++; | |
1349 | *data = (void *) options; | |
0b8e58a1 | 1350 | |
ac27a0ec DK |
1351 | return sb_block; |
1352 | } | |
1353 | ||
b3881f74 | 1354 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1355 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1356 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1357 | |
56c50f11 DM |
1358 | #ifdef CONFIG_QUOTA |
1359 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1360 | { | |
1361 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1362 | char *qname; | |
1363 | ||
1364 | if (sb_any_quota_loaded(sb) && | |
1365 | !sbi->s_qf_names[qtype]) { | |
1366 | ext4_msg(sb, KERN_ERR, | |
1367 | "Cannot change journaled " | |
1368 | "quota options when quota turned on"); | |
57f73c2c | 1369 | return -1; |
56c50f11 DM |
1370 | } |
1371 | qname = match_strdup(args); | |
1372 | if (!qname) { | |
1373 | ext4_msg(sb, KERN_ERR, | |
1374 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1375 | return -1; |
56c50f11 DM |
1376 | } |
1377 | if (sbi->s_qf_names[qtype] && | |
1378 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1379 | ext4_msg(sb, KERN_ERR, | |
1380 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1381 | kfree(qname); | |
57f73c2c | 1382 | return -1; |
56c50f11 DM |
1383 | } |
1384 | sbi->s_qf_names[qtype] = qname; | |
1385 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1386 | ext4_msg(sb, KERN_ERR, | |
1387 | "quotafile must be on filesystem root"); | |
1388 | kfree(sbi->s_qf_names[qtype]); | |
1389 | sbi->s_qf_names[qtype] = NULL; | |
57f73c2c | 1390 | return -1; |
56c50f11 | 1391 | } |
fd8c37ec | 1392 | set_opt(sb, QUOTA); |
56c50f11 DM |
1393 | return 1; |
1394 | } | |
1395 | ||
1396 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1397 | { | |
1398 | ||
1399 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1400 | ||
1401 | if (sb_any_quota_loaded(sb) && | |
1402 | sbi->s_qf_names[qtype]) { | |
1403 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1404 | " when quota turned on"); | |
57f73c2c | 1405 | return -1; |
56c50f11 DM |
1406 | } |
1407 | /* | |
1408 | * The space will be released later when all options are confirmed | |
1409 | * to be correct | |
1410 | */ | |
1411 | sbi->s_qf_names[qtype] = NULL; | |
1412 | return 1; | |
1413 | } | |
1414 | #endif | |
1415 | ||
26092bf5 TT |
1416 | #define MOPT_SET 0x0001 |
1417 | #define MOPT_CLEAR 0x0002 | |
1418 | #define MOPT_NOSUPPORT 0x0004 | |
1419 | #define MOPT_EXPLICIT 0x0008 | |
1420 | #define MOPT_CLEAR_ERR 0x0010 | |
1421 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1422 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1423 | #define MOPT_Q 0 |
1424 | #define MOPT_QFMT 0x0040 | |
1425 | #else | |
1426 | #define MOPT_Q MOPT_NOSUPPORT | |
1427 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1428 | #endif |
26092bf5 TT |
1429 | #define MOPT_DATAJ 0x0080 |
1430 | ||
1431 | static const struct mount_opts { | |
1432 | int token; | |
1433 | int mount_opt; | |
1434 | int flags; | |
1435 | } ext4_mount_opts[] = { | |
1436 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1437 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1438 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1439 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
1440 | {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, | |
1441 | {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, | |
1442 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, | |
1443 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
1444 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, | |
1445 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, | |
1446 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, | |
1447 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
1448 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, | |
1449 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, | |
1450 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, | |
1451 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | | |
1452 | EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, | |
1453 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, | |
1454 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, | |
1455 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1456 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
1457 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, | |
1458 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, | |
1459 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, | |
1460 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1461 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1462 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1463 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1464 | {Opt_commit, 0, MOPT_GTE0}, | |
1465 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1466 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1467 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1468 | {Opt_init_itable, 0, MOPT_GTE0}, | |
1469 | {Opt_stripe, 0, MOPT_GTE0}, | |
1470 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, | |
1471 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, | |
1472 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, | |
03010a33 | 1473 | #ifdef CONFIG_EXT4_FS_XATTR |
26092bf5 TT |
1474 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1475 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
ac27a0ec | 1476 | #else |
26092bf5 TT |
1477 | {Opt_user_xattr, 0, MOPT_NOSUPPORT}, |
1478 | {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1479 | #endif |
03010a33 | 1480 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1481 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1482 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1483 | #else |
26092bf5 TT |
1484 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1485 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1486 | #endif |
26092bf5 TT |
1487 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1488 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1489 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1490 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1491 | MOPT_SET | MOPT_Q}, | |
1492 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1493 | MOPT_SET | MOPT_Q}, | |
1494 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1495 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1496 | {Opt_usrjquota, 0, MOPT_Q}, | |
1497 | {Opt_grpjquota, 0, MOPT_Q}, | |
1498 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1499 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1500 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1501 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1502 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
1503 | {Opt_err, 0, 0} | |
1504 | }; | |
1505 | ||
1506 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1507 | substring_t *args, unsigned long *journal_devnum, | |
1508 | unsigned int *journal_ioprio, int is_remount) | |
1509 | { | |
1510 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1511 | const struct mount_opts *m; | |
08cefc7a EB |
1512 | kuid_t uid; |
1513 | kgid_t gid; | |
26092bf5 TT |
1514 | int arg = 0; |
1515 | ||
57f73c2c TT |
1516 | #ifdef CONFIG_QUOTA |
1517 | if (token == Opt_usrjquota) | |
1518 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1519 | else if (token == Opt_grpjquota) | |
1520 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1521 | else if (token == Opt_offusrjquota) | |
1522 | return clear_qf_name(sb, USRQUOTA); | |
1523 | else if (token == Opt_offgrpjquota) | |
1524 | return clear_qf_name(sb, GRPQUOTA); | |
1525 | #endif | |
26092bf5 TT |
1526 | if (args->from && match_int(args, &arg)) |
1527 | return -1; | |
1528 | switch (token) { | |
f7048605 TT |
1529 | case Opt_noacl: |
1530 | case Opt_nouser_xattr: | |
1531 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1532 | break; | |
26092bf5 TT |
1533 | case Opt_sb: |
1534 | return 1; /* handled by get_sb_block() */ | |
1535 | case Opt_removed: | |
1536 | ext4_msg(sb, KERN_WARNING, | |
1537 | "Ignoring removed %s option", opt); | |
1538 | return 1; | |
1539 | case Opt_resuid: | |
08cefc7a EB |
1540 | uid = make_kuid(current_user_ns(), arg); |
1541 | if (!uid_valid(uid)) { | |
1542 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
1543 | return -1; | |
1544 | } | |
1545 | sbi->s_resuid = uid; | |
26092bf5 TT |
1546 | return 1; |
1547 | case Opt_resgid: | |
08cefc7a EB |
1548 | gid = make_kgid(current_user_ns(), arg); |
1549 | if (!gid_valid(gid)) { | |
1550 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1551 | return -1; | |
1552 | } | |
1553 | sbi->s_resgid = gid; | |
26092bf5 TT |
1554 | return 1; |
1555 | case Opt_abort: | |
1556 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1557 | return 1; | |
1558 | case Opt_i_version: | |
1559 | sb->s_flags |= MS_I_VERSION; | |
1560 | return 1; | |
1561 | case Opt_journal_dev: | |
1562 | if (is_remount) { | |
1563 | ext4_msg(sb, KERN_ERR, | |
1564 | "Cannot specify journal on remount"); | |
1565 | return -1; | |
1566 | } | |
1567 | *journal_devnum = arg; | |
1568 | return 1; | |
1569 | case Opt_journal_ioprio: | |
1570 | if (arg < 0 || arg > 7) | |
1571 | return -1; | |
1572 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
1573 | return 1; | |
1574 | } | |
1575 | ||
1576 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1577 | if (token != m->token) | |
1578 | continue; | |
1579 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1580 | return -1; | |
1581 | if (m->flags & MOPT_EXPLICIT) | |
1582 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1583 | if (m->flags & MOPT_CLEAR_ERR) | |
1584 | clear_opt(sb, ERRORS_MASK); | |
1585 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1586 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1587 | "options when quota turned on"); | |
1588 | return -1; | |
1589 | } | |
1590 | ||
1591 | if (m->flags & MOPT_NOSUPPORT) { | |
1592 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1593 | } else if (token == Opt_commit) { | |
1594 | if (arg == 0) | |
1595 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1596 | sbi->s_commit_interval = HZ * arg; | |
1597 | } else if (token == Opt_max_batch_time) { | |
1598 | if (arg == 0) | |
1599 | arg = EXT4_DEF_MAX_BATCH_TIME; | |
1600 | sbi->s_max_batch_time = arg; | |
1601 | } else if (token == Opt_min_batch_time) { | |
1602 | sbi->s_min_batch_time = arg; | |
1603 | } else if (token == Opt_inode_readahead_blks) { | |
1604 | if (arg > (1 << 30)) | |
1605 | return -1; | |
1606 | if (arg && !is_power_of_2(arg)) { | |
b31e1552 | 1607 | ext4_msg(sb, KERN_ERR, |
26092bf5 TT |
1608 | "EXT4-fs: inode_readahead_blks" |
1609 | " must be a power of 2"); | |
1610 | return -1; | |
ac27a0ec | 1611 | } |
26092bf5 TT |
1612 | sbi->s_inode_readahead_blks = arg; |
1613 | } else if (token == Opt_init_itable) { | |
1614 | set_opt(sb, INIT_INODE_TABLE); | |
1615 | if (!args->from) | |
1616 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1617 | sbi->s_li_wait_mult = arg; | |
1618 | } else if (token == Opt_stripe) { | |
1619 | sbi->s_stripe = arg; | |
1620 | } else if (m->flags & MOPT_DATAJ) { | |
ac27a0ec | 1621 | if (is_remount) { |
eb513689 TT |
1622 | if (!sbi->s_journal) |
1623 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
26092bf5 TT |
1624 | else if (test_opt(sb, DATA_FLAGS) != |
1625 | m->mount_opt) { | |
b31e1552 | 1626 | ext4_msg(sb, KERN_ERR, |
26092bf5 TT |
1627 | "Cannot change data mode on remount"); |
1628 | return -1; | |
ac27a0ec DK |
1629 | } |
1630 | } else { | |
fd8c37ec | 1631 | clear_opt(sb, DATA_FLAGS); |
26092bf5 | 1632 | sbi->s_mount_opt |= m->mount_opt; |
ac27a0ec | 1633 | } |
ac27a0ec | 1634 | #ifdef CONFIG_QUOTA |
26092bf5 | 1635 | } else if (m->flags & MOPT_QFMT) { |
17bd13b3 | 1636 | if (sb_any_quota_loaded(sb) && |
26092bf5 TT |
1637 | sbi->s_jquota_fmt != m->mount_opt) { |
1638 | ext4_msg(sb, KERN_ERR, "Cannot " | |
1639 | "change journaled quota options " | |
1640 | "when quota turned on"); | |
1641 | return -1; | |
ac27a0ec | 1642 | } |
26092bf5 | 1643 | sbi->s_jquota_fmt = m->mount_opt; |
ac27a0ec | 1644 | #endif |
26092bf5 TT |
1645 | } else { |
1646 | if (!args->from) | |
1647 | arg = 1; | |
1648 | if (m->flags & MOPT_CLEAR) | |
1649 | arg = !arg; | |
1650 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1651 | ext4_msg(sb, KERN_WARNING, | |
1652 | "buggy handling of option %s", opt); | |
1653 | WARN_ON(1); | |
1654 | return -1; | |
3197ebdb | 1655 | } |
26092bf5 TT |
1656 | if (arg != 0) |
1657 | sbi->s_mount_opt |= m->mount_opt; | |
afd4672d | 1658 | else |
26092bf5 | 1659 | sbi->s_mount_opt &= ~m->mount_opt; |
ac27a0ec | 1660 | } |
26092bf5 TT |
1661 | return 1; |
1662 | } | |
1663 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1664 | "or missing value", opt); | |
1665 | return -1; | |
1666 | } | |
1667 | ||
1668 | static int parse_options(char *options, struct super_block *sb, | |
1669 | unsigned long *journal_devnum, | |
1670 | unsigned int *journal_ioprio, | |
1671 | int is_remount) | |
1672 | { | |
db7e5c66 | 1673 | #ifdef CONFIG_QUOTA |
26092bf5 | 1674 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
db7e5c66 | 1675 | #endif |
26092bf5 TT |
1676 | char *p; |
1677 | substring_t args[MAX_OPT_ARGS]; | |
1678 | int token; | |
1679 | ||
1680 | if (!options) | |
1681 | return 1; | |
1682 | ||
1683 | while ((p = strsep(&options, ",")) != NULL) { | |
1684 | if (!*p) | |
1685 | continue; | |
1686 | /* | |
1687 | * Initialize args struct so we know whether arg was | |
1688 | * found; some options take optional arguments. | |
1689 | */ | |
1690 | args[0].to = args[0].from = 0; | |
1691 | token = match_token(p, tokens, args); | |
1692 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1693 | journal_ioprio, is_remount) < 0) | |
1694 | return 0; | |
ac27a0ec DK |
1695 | } |
1696 | #ifdef CONFIG_QUOTA | |
1697 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1698 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1699 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1700 | |
482a7425 | 1701 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1702 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1703 | |
56c50f11 | 1704 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1705 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1706 | "format mixing"); | |
ac27a0ec DK |
1707 | return 0; |
1708 | } | |
1709 | ||
1710 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1711 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1712 | "not specified"); | |
ac27a0ec DK |
1713 | return 0; |
1714 | } | |
1715 | } else { | |
1716 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1717 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1718 | "specified with no journaling " |
b31e1552 | 1719 | "enabled"); |
ac27a0ec DK |
1720 | return 0; |
1721 | } | |
1722 | } | |
1723 | #endif | |
1724 | return 1; | |
1725 | } | |
1726 | ||
2adf6da8 TT |
1727 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1728 | struct super_block *sb) | |
1729 | { | |
1730 | #if defined(CONFIG_QUOTA) | |
1731 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1732 | ||
1733 | if (sbi->s_jquota_fmt) { | |
1734 | char *fmtname = ""; | |
1735 | ||
1736 | switch (sbi->s_jquota_fmt) { | |
1737 | case QFMT_VFS_OLD: | |
1738 | fmtname = "vfsold"; | |
1739 | break; | |
1740 | case QFMT_VFS_V0: | |
1741 | fmtname = "vfsv0"; | |
1742 | break; | |
1743 | case QFMT_VFS_V1: | |
1744 | fmtname = "vfsv1"; | |
1745 | break; | |
1746 | } | |
1747 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1748 | } | |
1749 | ||
1750 | if (sbi->s_qf_names[USRQUOTA]) | |
1751 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1752 | ||
1753 | if (sbi->s_qf_names[GRPQUOTA]) | |
1754 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1755 | ||
1756 | if (test_opt(sb, USRQUOTA)) | |
1757 | seq_puts(seq, ",usrquota"); | |
1758 | ||
1759 | if (test_opt(sb, GRPQUOTA)) | |
1760 | seq_puts(seq, ",grpquota"); | |
1761 | #endif | |
1762 | } | |
1763 | ||
5a916be1 TT |
1764 | static const char *token2str(int token) |
1765 | { | |
1766 | static const struct match_token *t; | |
1767 | ||
1768 | for (t = tokens; t->token != Opt_err; t++) | |
1769 | if (t->token == token && !strchr(t->pattern, '=')) | |
1770 | break; | |
1771 | return t->pattern; | |
1772 | } | |
1773 | ||
2adf6da8 TT |
1774 | /* |
1775 | * Show an option if | |
1776 | * - it's set to a non-default value OR | |
1777 | * - if the per-sb default is different from the global default | |
1778 | */ | |
66acdcf4 TT |
1779 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1780 | int nodefs) | |
2adf6da8 | 1781 | { |
2adf6da8 TT |
1782 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1783 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1784 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1785 | const struct mount_opts *m; |
66acdcf4 | 1786 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1787 | |
66acdcf4 TT |
1788 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1789 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1790 | |
1791 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1792 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1793 | ||
1794 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1795 | int want_set = m->flags & MOPT_SET; | |
1796 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1797 | (m->flags & MOPT_CLEAR_ERR)) | |
1798 | continue; | |
66acdcf4 | 1799 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1800 | continue; /* skip if same as the default */ |
1801 | if ((want_set && | |
1802 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1803 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1804 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1805 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1806 | } |
5a916be1 | 1807 | |
08cefc7a | 1808 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1809 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1810 | SEQ_OPTS_PRINT("resuid=%u", |
1811 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1812 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1813 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1814 | SEQ_OPTS_PRINT("resgid=%u", |
1815 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1816 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1817 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1818 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1819 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1820 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1821 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1822 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1823 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1824 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1825 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1826 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1827 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1828 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1829 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1830 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1831 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1832 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1833 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1834 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1835 | SEQ_OPTS_PUTS("data=journal"); | |
1836 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1837 | SEQ_OPTS_PUTS("data=ordered"); | |
1838 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1839 | SEQ_OPTS_PUTS("data=writeback"); | |
1840 | } | |
66acdcf4 TT |
1841 | if (nodefs || |
1842 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1843 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1844 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1845 | |
66acdcf4 TT |
1846 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1847 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1848 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
2adf6da8 TT |
1849 | |
1850 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1851 | return 0; |
1852 | } | |
1853 | ||
66acdcf4 TT |
1854 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1855 | { | |
1856 | return _ext4_show_options(seq, root->d_sb, 0); | |
1857 | } | |
1858 | ||
1859 | static int options_seq_show(struct seq_file *seq, void *offset) | |
1860 | { | |
1861 | struct super_block *sb = seq->private; | |
1862 | int rc; | |
1863 | ||
1864 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1865 | rc = _ext4_show_options(seq, sb, 1); | |
1866 | seq_puts(seq, "\n"); | |
1867 | return rc; | |
1868 | } | |
1869 | ||
1870 | static int options_open_fs(struct inode *inode, struct file *file) | |
1871 | { | |
1872 | return single_open(file, options_seq_show, PDE(inode)->data); | |
1873 | } | |
1874 | ||
1875 | static const struct file_operations ext4_seq_options_fops = { | |
1876 | .owner = THIS_MODULE, | |
1877 | .open = options_open_fs, | |
1878 | .read = seq_read, | |
1879 | .llseek = seq_lseek, | |
1880 | .release = single_release, | |
1881 | }; | |
1882 | ||
617ba13b | 1883 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1884 | int read_only) |
1885 | { | |
617ba13b | 1886 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1887 | int res = 0; |
1888 | ||
617ba13b | 1889 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1890 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1891 | "forcing read-only mode"); | |
ac27a0ec DK |
1892 | res = MS_RDONLY; |
1893 | } | |
1894 | if (read_only) | |
281b5995 | 1895 | goto done; |
617ba13b | 1896 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1897 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1898 | "running e2fsck is recommended"); | |
617ba13b | 1899 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1900 | ext4_msg(sb, KERN_WARNING, |
1901 | "warning: mounting fs with errors, " | |
1902 | "running e2fsck is recommended"); | |
ed3ce80a | 1903 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1904 | le16_to_cpu(es->s_mnt_count) >= |
1905 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1906 | ext4_msg(sb, KERN_WARNING, |
1907 | "warning: maximal mount count reached, " | |
1908 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1909 | else if (le32_to_cpu(es->s_checkinterval) && |
1910 | (le32_to_cpu(es->s_lastcheck) + | |
1911 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1912 | ext4_msg(sb, KERN_WARNING, |
1913 | "warning: checktime reached, " | |
1914 | "running e2fsck is recommended"); | |
0b8e58a1 | 1915 | if (!sbi->s_journal) |
0390131b | 1916 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1917 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1918 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1919 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1920 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1921 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1922 | if (sbi->s_journal) |
1923 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1924 | |
e2d67052 | 1925 | ext4_commit_super(sb, 1); |
281b5995 | 1926 | done: |
ac27a0ec | 1927 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1928 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1929 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1930 | sb->s_blocksize, |
1931 | sbi->s_groups_count, | |
617ba13b MC |
1932 | EXT4_BLOCKS_PER_GROUP(sb), |
1933 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1934 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1935 | |
7abc52c2 | 1936 | cleancache_init_fs(sb); |
ac27a0ec DK |
1937 | return res; |
1938 | } | |
1939 | ||
772cb7c8 JS |
1940 | static int ext4_fill_flex_info(struct super_block *sb) |
1941 | { | |
1942 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1943 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1944 | ext4_group_t flex_group_count; |
1945 | ext4_group_t flex_group; | |
d50f2ab6 | 1946 | unsigned int groups_per_flex = 0; |
c5ca7c76 | 1947 | size_t size; |
772cb7c8 JS |
1948 | int i; |
1949 | ||
503358ae | 1950 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 1951 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
1952 | sbi->s_log_groups_per_flex = 0; |
1953 | return 1; | |
1954 | } | |
d50f2ab6 | 1955 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
772cb7c8 | 1956 | |
c62a11fd FB |
1957 | /* We allocate both existing and potentially added groups */ |
1958 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1959 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1960 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 | 1961 | size = flex_group_count * sizeof(struct flex_groups); |
9933fc0a | 1962 | sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); |
c5ca7c76 | 1963 | if (sbi->s_flex_groups == NULL) { |
9933fc0a TT |
1964 | ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", |
1965 | flex_group_count); | |
1966 | goto failed; | |
772cb7c8 | 1967 | } |
772cb7c8 | 1968 | |
772cb7c8 | 1969 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1970 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1971 | |
1972 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1973 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1974 | &sbi->s_flex_groups[flex_group].free_inodes); | |
021b65bb | 1975 | atomic_add(ext4_free_group_clusters(sb, gdp), |
24aaa8ef | 1976 | &sbi->s_flex_groups[flex_group].free_clusters); |
7ad9bb65 TT |
1977 | atomic_add(ext4_used_dirs_count(sb, gdp), |
1978 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1979 | } |
1980 | ||
1981 | return 1; | |
1982 | failed: | |
1983 | return 0; | |
1984 | } | |
1985 | ||
feb0ab32 DW |
1986 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1987 | struct ext4_group_desc *gdp) | |
717d50e4 | 1988 | { |
feb0ab32 | 1989 | int offset; |
717d50e4 | 1990 | __u16 crc = 0; |
feb0ab32 | 1991 | __le32 le_group = cpu_to_le32(block_group); |
717d50e4 | 1992 | |
feb0ab32 DW |
1993 | if ((sbi->s_es->s_feature_ro_compat & |
1994 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { | |
1995 | /* Use new metadata_csum algorithm */ | |
1996 | __u16 old_csum; | |
1997 | __u32 csum32; | |
1998 | ||
1999 | old_csum = gdp->bg_checksum; | |
2000 | gdp->bg_checksum = 0; | |
2001 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2002 | sizeof(le_group)); | |
2003 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2004 | sbi->s_desc_size); | |
2005 | gdp->bg_checksum = old_csum; | |
2006 | ||
2007 | crc = csum32 & 0xFFFF; | |
2008 | goto out; | |
717d50e4 AD |
2009 | } |
2010 | ||
feb0ab32 DW |
2011 | /* old crc16 code */ |
2012 | offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2013 | ||
2014 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2015 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2016 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2017 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2018 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2019 | if ((sbi->s_es->s_feature_incompat & | |
2020 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2021 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2022 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2023 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2024 | offset); | |
2025 | ||
2026 | out: | |
717d50e4 AD |
2027 | return cpu_to_le16(crc); |
2028 | } | |
2029 | ||
feb0ab32 | 2030 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2031 | struct ext4_group_desc *gdp) |
2032 | { | |
feb0ab32 DW |
2033 | if (ext4_has_group_desc_csum(sb) && |
2034 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), | |
2035 | block_group, gdp))) | |
717d50e4 AD |
2036 | return 0; |
2037 | ||
2038 | return 1; | |
2039 | } | |
2040 | ||
feb0ab32 DW |
2041 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2042 | struct ext4_group_desc *gdp) | |
2043 | { | |
2044 | if (!ext4_has_group_desc_csum(sb)) | |
2045 | return; | |
2046 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); | |
2047 | } | |
2048 | ||
ac27a0ec | 2049 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2050 | static int ext4_check_descriptors(struct super_block *sb, |
2051 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2052 | { |
617ba13b MC |
2053 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2054 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2055 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2056 | ext4_fsblk_t block_bitmap; |
2057 | ext4_fsblk_t inode_bitmap; | |
2058 | ext4_fsblk_t inode_table; | |
ce421581 | 2059 | int flexbg_flag = 0; |
bfff6873 | 2060 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2061 | |
ce421581 JS |
2062 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2063 | flexbg_flag = 1; | |
2064 | ||
af5bc92d | 2065 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2066 | |
197cd65a AM |
2067 | for (i = 0; i < sbi->s_groups_count; i++) { |
2068 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2069 | ||
ce421581 | 2070 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2071 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2072 | else |
2073 | last_block = first_block + | |
617ba13b | 2074 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2075 | |
bfff6873 LC |
2076 | if ((grp == sbi->s_groups_count) && |
2077 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2078 | grp = i; | |
2079 | ||
8fadc143 | 2080 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2081 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2082 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2083 | "Block bitmap for group %u not in group " |
b31e1552 | 2084 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2085 | return 0; |
2086 | } | |
8fadc143 | 2087 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2088 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2089 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2090 | "Inode bitmap for group %u not in group " |
b31e1552 | 2091 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2092 | return 0; |
2093 | } | |
8fadc143 | 2094 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2095 | if (inode_table < first_block || |
2b2d6d01 | 2096 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2097 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2098 | "Inode table for group %u not in group " |
b31e1552 | 2099 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2100 | return 0; |
2101 | } | |
955ce5f5 | 2102 | ext4_lock_group(sb, i); |
feb0ab32 | 2103 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2104 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2105 | "Checksum for group %u failed (%u!=%u)", | |
2106 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2107 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2108 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2109 | ext4_unlock_group(sb, i); |
8a266467 | 2110 | return 0; |
7ee1ec4c | 2111 | } |
717d50e4 | 2112 | } |
955ce5f5 | 2113 | ext4_unlock_group(sb, i); |
ce421581 JS |
2114 | if (!flexbg_flag) |
2115 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2116 | } |
bfff6873 LC |
2117 | if (NULL != first_not_zeroed) |
2118 | *first_not_zeroed = grp; | |
ac27a0ec | 2119 | |
5dee5437 TT |
2120 | ext4_free_blocks_count_set(sbi->s_es, |
2121 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2122 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2123 | return 1; |
2124 | } | |
2125 | ||
617ba13b | 2126 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2127 | * the superblock) which were deleted from all directories, but held open by |
2128 | * a process at the time of a crash. We walk the list and try to delete these | |
2129 | * inodes at recovery time (only with a read-write filesystem). | |
2130 | * | |
2131 | * In order to keep the orphan inode chain consistent during traversal (in | |
2132 | * case of crash during recovery), we link each inode into the superblock | |
2133 | * orphan list_head and handle it the same way as an inode deletion during | |
2134 | * normal operation (which journals the operations for us). | |
2135 | * | |
2136 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2137 | * accidentally point at an in-use or already deleted inode. The worst that | |
2138 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2139 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2140 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2141 | * inode cleanup for us, so we can safely abort without any further action. | |
2142 | */ | |
2b2d6d01 TT |
2143 | static void ext4_orphan_cleanup(struct super_block *sb, |
2144 | struct ext4_super_block *es) | |
ac27a0ec DK |
2145 | { |
2146 | unsigned int s_flags = sb->s_flags; | |
2147 | int nr_orphans = 0, nr_truncates = 0; | |
2148 | #ifdef CONFIG_QUOTA | |
2149 | int i; | |
2150 | #endif | |
2151 | if (!es->s_last_orphan) { | |
2152 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2153 | return; | |
2154 | } | |
2155 | ||
a8f48a95 | 2156 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2157 | ext4_msg(sb, KERN_ERR, "write access " |
2158 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2159 | return; |
2160 | } | |
2161 | ||
d39195c3 AG |
2162 | /* Check if feature set would not allow a r/w mount */ |
2163 | if (!ext4_feature_set_ok(sb, 0)) { | |
2164 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2165 | "unknown ROCOMPAT features"); | |
2166 | return; | |
2167 | } | |
2168 | ||
617ba13b | 2169 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2170 | if (es->s_last_orphan) |
2171 | jbd_debug(1, "Errors on filesystem, " | |
2172 | "clearing orphan list.\n"); | |
2173 | es->s_last_orphan = 0; | |
2174 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2175 | return; | |
2176 | } | |
2177 | ||
2178 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2179 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2180 | sb->s_flags &= ~MS_RDONLY; |
2181 | } | |
2182 | #ifdef CONFIG_QUOTA | |
2183 | /* Needed for iput() to work correctly and not trash data */ | |
2184 | sb->s_flags |= MS_ACTIVE; | |
2185 | /* Turn on quotas so that they are updated correctly */ | |
2186 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2187 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2188 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2189 | if (ret < 0) |
b31e1552 ES |
2190 | ext4_msg(sb, KERN_ERR, |
2191 | "Cannot turn on journaled " | |
2192 | "quota: error %d", ret); | |
ac27a0ec DK |
2193 | } |
2194 | } | |
2195 | #endif | |
2196 | ||
2197 | while (es->s_last_orphan) { | |
2198 | struct inode *inode; | |
2199 | ||
97bd42b9 JB |
2200 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2201 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2202 | es->s_last_orphan = 0; |
2203 | break; | |
2204 | } | |
2205 | ||
617ba13b | 2206 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2207 | dquot_initialize(inode); |
ac27a0ec | 2208 | if (inode->i_nlink) { |
b31e1552 ES |
2209 | ext4_msg(sb, KERN_DEBUG, |
2210 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2211 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2212 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2213 | inode->i_ino, inode->i_size); |
617ba13b | 2214 | ext4_truncate(inode); |
ac27a0ec DK |
2215 | nr_truncates++; |
2216 | } else { | |
b31e1552 ES |
2217 | ext4_msg(sb, KERN_DEBUG, |
2218 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2219 | __func__, inode->i_ino); |
ac27a0ec DK |
2220 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2221 | inode->i_ino); | |
2222 | nr_orphans++; | |
2223 | } | |
2224 | iput(inode); /* The delete magic happens here! */ | |
2225 | } | |
2226 | ||
2b2d6d01 | 2227 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2228 | |
2229 | if (nr_orphans) | |
b31e1552 ES |
2230 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2231 | PLURAL(nr_orphans)); | |
ac27a0ec | 2232 | if (nr_truncates) |
b31e1552 ES |
2233 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2234 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2235 | #ifdef CONFIG_QUOTA |
2236 | /* Turn quotas off */ | |
2237 | for (i = 0; i < MAXQUOTAS; i++) { | |
2238 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2239 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2240 | } |
2241 | #endif | |
2242 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2243 | } | |
0b8e58a1 | 2244 | |
cd2291a4 ES |
2245 | /* |
2246 | * Maximal extent format file size. | |
2247 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2248 | * extent format containers, within a sector_t, and within i_blocks | |
2249 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2250 | * so that won't be a limiting factor. | |
2251 | * | |
f17722f9 LC |
2252 | * However there is other limiting factor. We do store extents in the form |
2253 | * of starting block and length, hence the resulting length of the extent | |
2254 | * covering maximum file size must fit into on-disk format containers as | |
2255 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2256 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2257 | * | |
cd2291a4 ES |
2258 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2259 | */ | |
f287a1a5 | 2260 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2261 | { |
2262 | loff_t res; | |
2263 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2264 | ||
2265 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2266 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2267 | /* |
90c699a9 | 2268 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2269 | * i_block represent total blocks in 512 bytes |
2270 | * 32 == size of vfs inode i_blocks * 8 | |
2271 | */ | |
2272 | upper_limit = (1LL << 32) - 1; | |
2273 | ||
2274 | /* total blocks in file system block size */ | |
2275 | upper_limit >>= (blkbits - 9); | |
2276 | upper_limit <<= blkbits; | |
2277 | } | |
2278 | ||
f17722f9 LC |
2279 | /* |
2280 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2281 | * by one fs block, so ee_len can cover the extent of maximum file | |
2282 | * size | |
2283 | */ | |
2284 | res = (1LL << 32) - 1; | |
cd2291a4 | 2285 | res <<= blkbits; |
cd2291a4 ES |
2286 | |
2287 | /* Sanity check against vm- & vfs- imposed limits */ | |
2288 | if (res > upper_limit) | |
2289 | res = upper_limit; | |
2290 | ||
2291 | return res; | |
2292 | } | |
ac27a0ec | 2293 | |
ac27a0ec | 2294 | /* |
cd2291a4 | 2295 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2296 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2297 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2298 | */ |
f287a1a5 | 2299 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2300 | { |
617ba13b | 2301 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2302 | int meta_blocks; |
2303 | loff_t upper_limit; | |
0b8e58a1 AD |
2304 | /* This is calculated to be the largest file size for a dense, block |
2305 | * mapped file such that the file's total number of 512-byte sectors, | |
2306 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2307 | * | |
2308 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2309 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2310 | */ |
2311 | ||
f287a1a5 | 2312 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2313 | /* |
90c699a9 | 2314 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2315 | * the inode i_block field represents total file blocks in |
2316 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2317 | */ |
2318 | upper_limit = (1LL << 32) - 1; | |
2319 | ||
2320 | /* total blocks in file system block size */ | |
2321 | upper_limit >>= (bits - 9); | |
2322 | ||
2323 | } else { | |
8180a562 AK |
2324 | /* |
2325 | * We use 48 bit ext4_inode i_blocks | |
2326 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2327 | * represent total number of blocks in | |
2328 | * file system block size | |
2329 | */ | |
0fc1b451 AK |
2330 | upper_limit = (1LL << 48) - 1; |
2331 | ||
0fc1b451 AK |
2332 | } |
2333 | ||
2334 | /* indirect blocks */ | |
2335 | meta_blocks = 1; | |
2336 | /* double indirect blocks */ | |
2337 | meta_blocks += 1 + (1LL << (bits-2)); | |
2338 | /* tripple indirect blocks */ | |
2339 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2340 | ||
2341 | upper_limit -= meta_blocks; | |
2342 | upper_limit <<= bits; | |
ac27a0ec DK |
2343 | |
2344 | res += 1LL << (bits-2); | |
2345 | res += 1LL << (2*(bits-2)); | |
2346 | res += 1LL << (3*(bits-2)); | |
2347 | res <<= bits; | |
2348 | if (res > upper_limit) | |
2349 | res = upper_limit; | |
0fc1b451 AK |
2350 | |
2351 | if (res > MAX_LFS_FILESIZE) | |
2352 | res = MAX_LFS_FILESIZE; | |
2353 | ||
ac27a0ec DK |
2354 | return res; |
2355 | } | |
2356 | ||
617ba13b | 2357 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2358 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2359 | { |
617ba13b | 2360 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2361 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2362 | int has_super = 0; |
2363 | ||
2364 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2365 | ||
617ba13b | 2366 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2367 | nr < first_meta_bg) |
70bbb3e0 | 2368 | return logical_sb_block + nr + 1; |
ac27a0ec | 2369 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2370 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2371 | has_super = 1; |
0b8e58a1 | 2372 | |
617ba13b | 2373 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2374 | } |
2375 | ||
c9de560d AT |
2376 | /** |
2377 | * ext4_get_stripe_size: Get the stripe size. | |
2378 | * @sbi: In memory super block info | |
2379 | * | |
2380 | * If we have specified it via mount option, then | |
2381 | * use the mount option value. If the value specified at mount time is | |
2382 | * greater than the blocks per group use the super block value. | |
2383 | * If the super block value is greater than blocks per group return 0. | |
2384 | * Allocator needs it be less than blocks per group. | |
2385 | * | |
2386 | */ | |
2387 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2388 | { | |
2389 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2390 | unsigned long stripe_width = | |
2391 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2392 | int ret; |
c9de560d AT |
2393 | |
2394 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2395 | ret = sbi->s_stripe; |
2396 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2397 | ret = stripe_width; | |
2398 | else if (stride <= sbi->s_blocks_per_group) | |
2399 | ret = stride; | |
2400 | else | |
2401 | ret = 0; | |
c9de560d | 2402 | |
3eb08658 DE |
2403 | /* |
2404 | * If the stripe width is 1, this makes no sense and | |
2405 | * we set it to 0 to turn off stripe handling code. | |
2406 | */ | |
2407 | if (ret <= 1) | |
2408 | ret = 0; | |
c9de560d | 2409 | |
3eb08658 | 2410 | return ret; |
c9de560d | 2411 | } |
ac27a0ec | 2412 | |
3197ebdb TT |
2413 | /* sysfs supprt */ |
2414 | ||
2415 | struct ext4_attr { | |
2416 | struct attribute attr; | |
2417 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2418 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2419 | const char *, size_t); |
2420 | int offset; | |
2421 | }; | |
2422 | ||
2423 | static int parse_strtoul(const char *buf, | |
2424 | unsigned long max, unsigned long *value) | |
2425 | { | |
2426 | char *endp; | |
2427 | ||
e7d2860b AGR |
2428 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2429 | endp = skip_spaces(endp); | |
3197ebdb TT |
2430 | if (*endp || *value > max) |
2431 | return -EINVAL; | |
2432 | ||
2433 | return 0; | |
2434 | } | |
2435 | ||
2436 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2437 | struct ext4_sb_info *sbi, | |
2438 | char *buf) | |
2439 | { | |
2440 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2441 | (s64) EXT4_C2B(sbi, |
2442 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2443 | } |
2444 | ||
2445 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2446 | struct ext4_sb_info *sbi, char *buf) | |
2447 | { | |
2448 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2449 | ||
f613dfcb TT |
2450 | if (!sb->s_bdev->bd_part) |
2451 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2452 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2453 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2454 | sbi->s_sectors_written_start) >> 1); | |
2455 | } | |
2456 | ||
2457 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2458 | struct ext4_sb_info *sbi, char *buf) | |
2459 | { | |
2460 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2461 | ||
f613dfcb TT |
2462 | if (!sb->s_bdev->bd_part) |
2463 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2464 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2465 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2466 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2467 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2468 | } |
2469 | ||
2470 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2471 | struct ext4_sb_info *sbi, | |
2472 | const char *buf, size_t count) | |
2473 | { | |
2474 | unsigned long t; | |
2475 | ||
2476 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2477 | return -EINVAL; | |
2478 | ||
5dbd571d | 2479 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2480 | return -EINVAL; |
2481 | ||
2482 | sbi->s_inode_readahead_blks = t; | |
2483 | return count; | |
2484 | } | |
2485 | ||
2486 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2487 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2488 | { |
2489 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2490 | ||
2491 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2492 | } | |
2493 | ||
2494 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2495 | struct ext4_sb_info *sbi, | |
2496 | const char *buf, size_t count) | |
2497 | { | |
2498 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2499 | unsigned long t; | |
2500 | ||
2501 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2502 | return -EINVAL; | |
2503 | *ui = t; | |
2504 | return count; | |
2505 | } | |
2506 | ||
2c0544b2 TT |
2507 | static ssize_t trigger_test_error(struct ext4_attr *a, |
2508 | struct ext4_sb_info *sbi, | |
2509 | const char *buf, size_t count) | |
2510 | { | |
2511 | int len = count; | |
2512 | ||
2513 | if (!capable(CAP_SYS_ADMIN)) | |
2514 | return -EPERM; | |
2515 | ||
2516 | if (len && buf[len-1] == '\n') | |
2517 | len--; | |
2518 | ||
2519 | if (len) | |
2520 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
2521 | return count; | |
2522 | } | |
2523 | ||
3197ebdb TT |
2524 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
2525 | static struct ext4_attr ext4_attr_##_name = { \ | |
2526 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2527 | .show = _show, \ | |
2528 | .store = _store, \ | |
2529 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2530 | } | |
2531 | #define EXT4_ATTR(name, mode, show, store) \ | |
2532 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2533 | ||
857ac889 | 2534 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2535 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2536 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2537 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2538 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2539 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2540 | ||
2541 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2542 | EXT4_RO_ATTR(session_write_kbytes); | |
2543 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2544 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2545 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2546 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2547 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2548 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2549 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2550 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2551 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2552 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2553 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
2c0544b2 | 2554 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
3197ebdb TT |
2555 | |
2556 | static struct attribute *ext4_attrs[] = { | |
2557 | ATTR_LIST(delayed_allocation_blocks), | |
2558 | ATTR_LIST(session_write_kbytes), | |
2559 | ATTR_LIST(lifetime_write_kbytes), | |
2560 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2561 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2562 | ATTR_LIST(mb_stats), |
2563 | ATTR_LIST(mb_max_to_scan), | |
2564 | ATTR_LIST(mb_min_to_scan), | |
2565 | ATTR_LIST(mb_order2_req), | |
2566 | ATTR_LIST(mb_stream_req), | |
2567 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2568 | ATTR_LIST(max_writeback_mb_bump), |
2c0544b2 | 2569 | ATTR_LIST(trigger_fs_error), |
3197ebdb TT |
2570 | NULL, |
2571 | }; | |
2572 | ||
857ac889 LC |
2573 | /* Features this copy of ext4 supports */ |
2574 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2575 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2576 | |
2577 | static struct attribute *ext4_feat_attrs[] = { | |
2578 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2579 | ATTR_LIST(batched_discard), |
857ac889 LC |
2580 | NULL, |
2581 | }; | |
2582 | ||
3197ebdb TT |
2583 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2584 | struct attribute *attr, char *buf) | |
2585 | { | |
2586 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2587 | s_kobj); | |
2588 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2589 | ||
2590 | return a->show ? a->show(a, sbi, buf) : 0; | |
2591 | } | |
2592 | ||
2593 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2594 | struct attribute *attr, | |
2595 | const char *buf, size_t len) | |
2596 | { | |
2597 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2598 | s_kobj); | |
2599 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2600 | ||
2601 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2602 | } | |
2603 | ||
2604 | static void ext4_sb_release(struct kobject *kobj) | |
2605 | { | |
2606 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2607 | s_kobj); | |
2608 | complete(&sbi->s_kobj_unregister); | |
2609 | } | |
2610 | ||
52cf25d0 | 2611 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2612 | .show = ext4_attr_show, |
2613 | .store = ext4_attr_store, | |
2614 | }; | |
2615 | ||
2616 | static struct kobj_type ext4_ktype = { | |
2617 | .default_attrs = ext4_attrs, | |
2618 | .sysfs_ops = &ext4_attr_ops, | |
2619 | .release = ext4_sb_release, | |
2620 | }; | |
2621 | ||
857ac889 LC |
2622 | static void ext4_feat_release(struct kobject *kobj) |
2623 | { | |
2624 | complete(&ext4_feat->f_kobj_unregister); | |
2625 | } | |
2626 | ||
2627 | static struct kobj_type ext4_feat_ktype = { | |
2628 | .default_attrs = ext4_feat_attrs, | |
2629 | .sysfs_ops = &ext4_attr_ops, | |
2630 | .release = ext4_feat_release, | |
2631 | }; | |
2632 | ||
a13fb1a4 ES |
2633 | /* |
2634 | * Check whether this filesystem can be mounted based on | |
2635 | * the features present and the RDONLY/RDWR mount requested. | |
2636 | * Returns 1 if this filesystem can be mounted as requested, | |
2637 | * 0 if it cannot be. | |
2638 | */ | |
2639 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2640 | { | |
2641 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2642 | ext4_msg(sb, KERN_ERR, | |
2643 | "Couldn't mount because of " | |
2644 | "unsupported optional features (%x)", | |
2645 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2646 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2647 | return 0; | |
2648 | } | |
2649 | ||
2650 | if (readonly) | |
2651 | return 1; | |
2652 | ||
2653 | /* Check that feature set is OK for a read-write mount */ | |
2654 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2655 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2656 | "unsupported optional features (%x)", | |
2657 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2658 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2659 | return 0; | |
2660 | } | |
2661 | /* | |
2662 | * Large file size enabled file system can only be mounted | |
2663 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2664 | */ | |
2665 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2666 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2667 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2668 | "cannot be mounted RDWR without " | |
2669 | "CONFIG_LBDAF"); | |
2670 | return 0; | |
2671 | } | |
2672 | } | |
bab08ab9 TT |
2673 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2674 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2675 | ext4_msg(sb, KERN_ERR, | |
2676 | "Can't support bigalloc feature without " | |
2677 | "extents feature\n"); | |
2678 | return 0; | |
2679 | } | |
7c319d32 AK |
2680 | |
2681 | #ifndef CONFIG_QUOTA | |
2682 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
2683 | !readonly) { | |
2684 | ext4_msg(sb, KERN_ERR, | |
2685 | "Filesystem with quota feature cannot be mounted RDWR " | |
2686 | "without CONFIG_QUOTA"); | |
2687 | return 0; | |
2688 | } | |
2689 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2690 | return 1; |
2691 | } | |
2692 | ||
66e61a9e TT |
2693 | /* |
2694 | * This function is called once a day if we have errors logged | |
2695 | * on the file system | |
2696 | */ | |
2697 | static void print_daily_error_info(unsigned long arg) | |
2698 | { | |
2699 | struct super_block *sb = (struct super_block *) arg; | |
2700 | struct ext4_sb_info *sbi; | |
2701 | struct ext4_super_block *es; | |
2702 | ||
2703 | sbi = EXT4_SB(sb); | |
2704 | es = sbi->s_es; | |
2705 | ||
2706 | if (es->s_error_count) | |
2707 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2708 | le32_to_cpu(es->s_error_count)); | |
2709 | if (es->s_first_error_time) { | |
2710 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2711 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2712 | (int) sizeof(es->s_first_error_func), | |
2713 | es->s_first_error_func, | |
2714 | le32_to_cpu(es->s_first_error_line)); | |
2715 | if (es->s_first_error_ino) | |
2716 | printk(": inode %u", | |
2717 | le32_to_cpu(es->s_first_error_ino)); | |
2718 | if (es->s_first_error_block) | |
2719 | printk(": block %llu", (unsigned long long) | |
2720 | le64_to_cpu(es->s_first_error_block)); | |
2721 | printk("\n"); | |
2722 | } | |
2723 | if (es->s_last_error_time) { | |
2724 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2725 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2726 | (int) sizeof(es->s_last_error_func), | |
2727 | es->s_last_error_func, | |
2728 | le32_to_cpu(es->s_last_error_line)); | |
2729 | if (es->s_last_error_ino) | |
2730 | printk(": inode %u", | |
2731 | le32_to_cpu(es->s_last_error_ino)); | |
2732 | if (es->s_last_error_block) | |
2733 | printk(": block %llu", (unsigned long long) | |
2734 | le64_to_cpu(es->s_last_error_block)); | |
2735 | printk("\n"); | |
2736 | } | |
2737 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2738 | } | |
2739 | ||
bfff6873 LC |
2740 | /* Find next suitable group and run ext4_init_inode_table */ |
2741 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2742 | { | |
2743 | struct ext4_group_desc *gdp = NULL; | |
2744 | ext4_group_t group, ngroups; | |
2745 | struct super_block *sb; | |
2746 | unsigned long timeout = 0; | |
2747 | int ret = 0; | |
2748 | ||
2749 | sb = elr->lr_super; | |
2750 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2751 | ||
2752 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2753 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2754 | if (!gdp) { | |
2755 | ret = 1; | |
2756 | break; | |
2757 | } | |
2758 | ||
2759 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2760 | break; | |
2761 | } | |
2762 | ||
2763 | if (group == ngroups) | |
2764 | ret = 1; | |
2765 | ||
2766 | if (!ret) { | |
2767 | timeout = jiffies; | |
2768 | ret = ext4_init_inode_table(sb, group, | |
2769 | elr->lr_timeout ? 0 : 1); | |
2770 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2771 | timeout = (jiffies - timeout) * |
2772 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2773 | elr->lr_timeout = timeout; |
2774 | } | |
2775 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2776 | elr->lr_next_group = group + 1; | |
2777 | } | |
2778 | ||
2779 | return ret; | |
2780 | } | |
2781 | ||
2782 | /* | |
2783 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2784 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2785 | */ |
2786 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2787 | { | |
2788 | struct ext4_sb_info *sbi; | |
2789 | ||
2790 | if (!elr) | |
2791 | return; | |
2792 | ||
2793 | sbi = elr->lr_sbi; | |
2794 | ||
2795 | list_del(&elr->lr_request); | |
2796 | sbi->s_li_request = NULL; | |
2797 | kfree(elr); | |
2798 | } | |
2799 | ||
2800 | static void ext4_unregister_li_request(struct super_block *sb) | |
2801 | { | |
1bb933fb LC |
2802 | mutex_lock(&ext4_li_mtx); |
2803 | if (!ext4_li_info) { | |
2804 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2805 | return; |
1bb933fb | 2806 | } |
bfff6873 LC |
2807 | |
2808 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2809 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2810 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2811 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2812 | } |
2813 | ||
8f1f7453 ES |
2814 | static struct task_struct *ext4_lazyinit_task; |
2815 | ||
bfff6873 LC |
2816 | /* |
2817 | * This is the function where ext4lazyinit thread lives. It walks | |
2818 | * through the request list searching for next scheduled filesystem. | |
2819 | * When such a fs is found, run the lazy initialization request | |
2820 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2821 | * function. Based on that time we compute next schedule time of | |
2822 | * the request. When walking through the list is complete, compute | |
2823 | * next waking time and put itself into sleep. | |
2824 | */ | |
2825 | static int ext4_lazyinit_thread(void *arg) | |
2826 | { | |
2827 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2828 | struct list_head *pos, *n; | |
2829 | struct ext4_li_request *elr; | |
4ed5c033 | 2830 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2831 | |
2832 | BUG_ON(NULL == eli); | |
2833 | ||
bfff6873 LC |
2834 | cont_thread: |
2835 | while (true) { | |
2836 | next_wakeup = MAX_JIFFY_OFFSET; | |
2837 | ||
2838 | mutex_lock(&eli->li_list_mtx); | |
2839 | if (list_empty(&eli->li_request_list)) { | |
2840 | mutex_unlock(&eli->li_list_mtx); | |
2841 | goto exit_thread; | |
2842 | } | |
2843 | ||
2844 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2845 | elr = list_entry(pos, struct ext4_li_request, | |
2846 | lr_request); | |
2847 | ||
b2c78cd0 TT |
2848 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2849 | if (ext4_run_li_request(elr) != 0) { | |
2850 | /* error, remove the lazy_init job */ | |
2851 | ext4_remove_li_request(elr); | |
2852 | continue; | |
2853 | } | |
bfff6873 LC |
2854 | } |
2855 | ||
2856 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2857 | next_wakeup = elr->lr_next_sched; | |
2858 | } | |
2859 | mutex_unlock(&eli->li_list_mtx); | |
2860 | ||
a0acae0e | 2861 | try_to_freeze(); |
bfff6873 | 2862 | |
4ed5c033 LC |
2863 | cur = jiffies; |
2864 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2865 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2866 | cond_resched(); |
2867 | continue; | |
2868 | } | |
2869 | ||
4ed5c033 LC |
2870 | schedule_timeout_interruptible(next_wakeup - cur); |
2871 | ||
8f1f7453 ES |
2872 | if (kthread_should_stop()) { |
2873 | ext4_clear_request_list(); | |
2874 | goto exit_thread; | |
2875 | } | |
bfff6873 LC |
2876 | } |
2877 | ||
2878 | exit_thread: | |
2879 | /* | |
2880 | * It looks like the request list is empty, but we need | |
2881 | * to check it under the li_list_mtx lock, to prevent any | |
2882 | * additions into it, and of course we should lock ext4_li_mtx | |
2883 | * to atomically free the list and ext4_li_info, because at | |
2884 | * this point another ext4 filesystem could be registering | |
2885 | * new one. | |
2886 | */ | |
2887 | mutex_lock(&ext4_li_mtx); | |
2888 | mutex_lock(&eli->li_list_mtx); | |
2889 | if (!list_empty(&eli->li_request_list)) { | |
2890 | mutex_unlock(&eli->li_list_mtx); | |
2891 | mutex_unlock(&ext4_li_mtx); | |
2892 | goto cont_thread; | |
2893 | } | |
2894 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2895 | kfree(ext4_li_info); |
2896 | ext4_li_info = NULL; | |
2897 | mutex_unlock(&ext4_li_mtx); | |
2898 | ||
2899 | return 0; | |
2900 | } | |
2901 | ||
2902 | static void ext4_clear_request_list(void) | |
2903 | { | |
2904 | struct list_head *pos, *n; | |
2905 | struct ext4_li_request *elr; | |
2906 | ||
2907 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2908 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2909 | elr = list_entry(pos, struct ext4_li_request, | |
2910 | lr_request); | |
2911 | ext4_remove_li_request(elr); | |
2912 | } | |
2913 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2914 | } | |
2915 | ||
2916 | static int ext4_run_lazyinit_thread(void) | |
2917 | { | |
8f1f7453 ES |
2918 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2919 | ext4_li_info, "ext4lazyinit"); | |
2920 | if (IS_ERR(ext4_lazyinit_task)) { | |
2921 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2922 | ext4_clear_request_list(); |
bfff6873 LC |
2923 | kfree(ext4_li_info); |
2924 | ext4_li_info = NULL; | |
92b97816 | 2925 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2926 | "initialization thread\n", |
2927 | err); | |
2928 | return err; | |
2929 | } | |
2930 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2931 | return 0; |
2932 | } | |
2933 | ||
2934 | /* | |
2935 | * Check whether it make sense to run itable init. thread or not. | |
2936 | * If there is at least one uninitialized inode table, return | |
2937 | * corresponding group number, else the loop goes through all | |
2938 | * groups and return total number of groups. | |
2939 | */ | |
2940 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2941 | { | |
2942 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2943 | struct ext4_group_desc *gdp = NULL; | |
2944 | ||
2945 | for (group = 0; group < ngroups; group++) { | |
2946 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2947 | if (!gdp) | |
2948 | continue; | |
2949 | ||
2950 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2951 | break; | |
2952 | } | |
2953 | ||
2954 | return group; | |
2955 | } | |
2956 | ||
2957 | static int ext4_li_info_new(void) | |
2958 | { | |
2959 | struct ext4_lazy_init *eli = NULL; | |
2960 | ||
2961 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2962 | if (!eli) | |
2963 | return -ENOMEM; | |
2964 | ||
bfff6873 LC |
2965 | INIT_LIST_HEAD(&eli->li_request_list); |
2966 | mutex_init(&eli->li_list_mtx); | |
2967 | ||
bfff6873 LC |
2968 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2969 | ||
2970 | ext4_li_info = eli; | |
2971 | ||
2972 | return 0; | |
2973 | } | |
2974 | ||
2975 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2976 | ext4_group_t start) | |
2977 | { | |
2978 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2979 | struct ext4_li_request *elr; | |
2980 | unsigned long rnd; | |
2981 | ||
2982 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2983 | if (!elr) | |
2984 | return NULL; | |
2985 | ||
2986 | elr->lr_super = sb; | |
2987 | elr->lr_sbi = sbi; | |
2988 | elr->lr_next_group = start; | |
2989 | ||
2990 | /* | |
2991 | * Randomize first schedule time of the request to | |
2992 | * spread the inode table initialization requests | |
2993 | * better. | |
2994 | */ | |
2995 | get_random_bytes(&rnd, sizeof(rnd)); | |
2996 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2997 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2998 | ||
2999 | return elr; | |
3000 | } | |
3001 | ||
3002 | static int ext4_register_li_request(struct super_block *sb, | |
3003 | ext4_group_t first_not_zeroed) | |
3004 | { | |
3005 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3006 | struct ext4_li_request *elr; | |
3007 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 3008 | int ret = 0; |
bfff6873 | 3009 | |
51ce6511 LC |
3010 | if (sbi->s_li_request != NULL) { |
3011 | /* | |
3012 | * Reset timeout so it can be computed again, because | |
3013 | * s_li_wait_mult might have changed. | |
3014 | */ | |
3015 | sbi->s_li_request->lr_timeout = 0; | |
beed5ecb | 3016 | return 0; |
51ce6511 | 3017 | } |
bfff6873 LC |
3018 | |
3019 | if (first_not_zeroed == ngroups || | |
3020 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3021 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 3022 | return 0; |
bfff6873 LC |
3023 | |
3024 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
3025 | if (!elr) |
3026 | return -ENOMEM; | |
bfff6873 LC |
3027 | |
3028 | mutex_lock(&ext4_li_mtx); | |
3029 | ||
3030 | if (NULL == ext4_li_info) { | |
3031 | ret = ext4_li_info_new(); | |
3032 | if (ret) | |
3033 | goto out; | |
3034 | } | |
3035 | ||
3036 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3037 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3038 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3039 | ||
3040 | sbi->s_li_request = elr; | |
46e4690b TM |
3041 | /* |
3042 | * set elr to NULL here since it has been inserted to | |
3043 | * the request_list and the removal and free of it is | |
3044 | * handled by ext4_clear_request_list from now on. | |
3045 | */ | |
3046 | elr = NULL; | |
bfff6873 LC |
3047 | |
3048 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3049 | ret = ext4_run_lazyinit_thread(); | |
3050 | if (ret) | |
3051 | goto out; | |
3052 | } | |
bfff6873 | 3053 | out: |
beed5ecb NK |
3054 | mutex_unlock(&ext4_li_mtx); |
3055 | if (ret) | |
bfff6873 | 3056 | kfree(elr); |
bfff6873 LC |
3057 | return ret; |
3058 | } | |
3059 | ||
3060 | /* | |
3061 | * We do not need to lock anything since this is called on | |
3062 | * module unload. | |
3063 | */ | |
3064 | static void ext4_destroy_lazyinit_thread(void) | |
3065 | { | |
3066 | /* | |
3067 | * If thread exited earlier | |
3068 | * there's nothing to be done. | |
3069 | */ | |
8f1f7453 | 3070 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3071 | return; |
3072 | ||
8f1f7453 | 3073 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3074 | } |
3075 | ||
25ed6e8a DW |
3076 | static int set_journal_csum_feature_set(struct super_block *sb) |
3077 | { | |
3078 | int ret = 1; | |
3079 | int compat, incompat; | |
3080 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3081 | ||
3082 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3083 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3084 | /* journal checksum v2 */ | |
3085 | compat = 0; | |
3086 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; | |
3087 | } else { | |
3088 | /* journal checksum v1 */ | |
3089 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3090 | incompat = 0; | |
3091 | } | |
3092 | ||
3093 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3094 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3095 | compat, 0, | |
3096 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3097 | incompat); | |
3098 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3099 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3100 | compat, 0, | |
3101 | incompat); | |
3102 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3103 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3104 | } else { | |
3105 | jbd2_journal_clear_features(sbi->s_journal, | |
3106 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3107 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3108 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
3109 | } | |
3110 | ||
3111 | return ret; | |
3112 | } | |
3113 | ||
952fc18e TT |
3114 | /* |
3115 | * Note: calculating the overhead so we can be compatible with | |
3116 | * historical BSD practice is quite difficult in the face of | |
3117 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3118 | * different block group can end up in the same allocation cluster. | |
3119 | * Calculating the exact overhead in the face of clustered allocation | |
3120 | * requires either O(all block bitmaps) in memory or O(number of block | |
3121 | * groups**2) in time. We will still calculate the superblock for | |
3122 | * older file systems --- and if we come across with a bigalloc file | |
3123 | * system with zero in s_overhead_clusters the estimate will be close to | |
3124 | * correct especially for very large cluster sizes --- but for newer | |
3125 | * file systems, it's better to calculate this figure once at mkfs | |
3126 | * time, and store it in the superblock. If the superblock value is | |
3127 | * present (even for non-bigalloc file systems), we will use it. | |
3128 | */ | |
3129 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3130 | char *buf) | |
3131 | { | |
3132 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3133 | struct ext4_group_desc *gdp; | |
3134 | ext4_fsblk_t first_block, last_block, b; | |
3135 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3136 | int s, j, count = 0; | |
3137 | ||
3138 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + | |
3139 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3140 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3141 | for (i = 0; i < ngroups; i++) { | |
3142 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3143 | b = ext4_block_bitmap(sb, gdp); | |
3144 | if (b >= first_block && b <= last_block) { | |
3145 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3146 | count++; | |
3147 | } | |
3148 | b = ext4_inode_bitmap(sb, gdp); | |
3149 | if (b >= first_block && b <= last_block) { | |
3150 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3151 | count++; | |
3152 | } | |
3153 | b = ext4_inode_table(sb, gdp); | |
3154 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3155 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3156 | int c = EXT4_B2C(sbi, b - first_block); | |
3157 | ext4_set_bit(c, buf); | |
3158 | count++; | |
3159 | } | |
3160 | if (i != grp) | |
3161 | continue; | |
3162 | s = 0; | |
3163 | if (ext4_bg_has_super(sb, grp)) { | |
3164 | ext4_set_bit(s++, buf); | |
3165 | count++; | |
3166 | } | |
3167 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3168 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3169 | count++; | |
3170 | } | |
3171 | } | |
3172 | if (!count) | |
3173 | return 0; | |
3174 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3175 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3176 | } | |
3177 | ||
3178 | /* | |
3179 | * Compute the overhead and stash it in sbi->s_overhead | |
3180 | */ | |
3181 | int ext4_calculate_overhead(struct super_block *sb) | |
3182 | { | |
3183 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3184 | struct ext4_super_block *es = sbi->s_es; | |
3185 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3186 | ext4_fsblk_t overhead = 0; | |
3187 | char *buf = (char *) get_zeroed_page(GFP_KERNEL); | |
3188 | ||
3189 | memset(buf, 0, PAGE_SIZE); | |
3190 | if (!buf) | |
3191 | return -ENOMEM; | |
3192 | ||
3193 | /* | |
3194 | * Compute the overhead (FS structures). This is constant | |
3195 | * for a given filesystem unless the number of block groups | |
3196 | * changes so we cache the previous value until it does. | |
3197 | */ | |
3198 | ||
3199 | /* | |
3200 | * All of the blocks before first_data_block are overhead | |
3201 | */ | |
3202 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3203 | ||
3204 | /* | |
3205 | * Add the overhead found in each block group | |
3206 | */ | |
3207 | for (i = 0; i < ngroups; i++) { | |
3208 | int blks; | |
3209 | ||
3210 | blks = count_overhead(sb, i, buf); | |
3211 | overhead += blks; | |
3212 | if (blks) | |
3213 | memset(buf, 0, PAGE_SIZE); | |
3214 | cond_resched(); | |
3215 | } | |
3216 | sbi->s_overhead = overhead; | |
3217 | smp_wmb(); | |
3218 | free_page((unsigned long) buf); | |
3219 | return 0; | |
3220 | } | |
3221 | ||
2b2d6d01 | 3222 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3223 | { |
d4c402d9 | 3224 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3225 | struct buffer_head *bh; |
617ba13b MC |
3226 | struct ext4_super_block *es = NULL; |
3227 | struct ext4_sb_info *sbi; | |
3228 | ext4_fsblk_t block; | |
3229 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3230 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3231 | unsigned long offset = 0; |
ac27a0ec DK |
3232 | unsigned long journal_devnum = 0; |
3233 | unsigned long def_mount_opts; | |
3234 | struct inode *root; | |
9f6200bb | 3235 | char *cp; |
0390131b | 3236 | const char *descr; |
dcc7dae3 | 3237 | int ret = -ENOMEM; |
281b5995 | 3238 | int blocksize, clustersize; |
4ec11028 TT |
3239 | unsigned int db_count; |
3240 | unsigned int i; | |
281b5995 | 3241 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3242 | __u64 blocks_count; |
833f4077 | 3243 | int err; |
b3881f74 | 3244 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3245 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3246 | |
3247 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3248 | if (!sbi) | |
dcc7dae3 | 3249 | goto out_free_orig; |
705895b6 PE |
3250 | |
3251 | sbi->s_blockgroup_lock = | |
3252 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3253 | if (!sbi->s_blockgroup_lock) { | |
3254 | kfree(sbi); | |
dcc7dae3 | 3255 | goto out_free_orig; |
705895b6 | 3256 | } |
ac27a0ec | 3257 | sb->s_fs_info = sbi; |
2c0544b2 | 3258 | sbi->s_sb = sb; |
ac27a0ec | 3259 | sbi->s_mount_opt = 0; |
08cefc7a EB |
3260 | sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); |
3261 | sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); | |
240799cd | 3262 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3263 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3264 | if (sb->s_bdev->bd_part) |
3265 | sbi->s_sectors_written_start = | |
3266 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3267 | |
9f6200bb TT |
3268 | /* Cleanup superblock name */ |
3269 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3270 | *cp = '!'; | |
3271 | ||
dcc7dae3 | 3272 | ret = -EINVAL; |
617ba13b | 3273 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3274 | if (!blocksize) { |
b31e1552 | 3275 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3276 | goto out_fail; |
3277 | } | |
3278 | ||
3279 | /* | |
617ba13b | 3280 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3281 | * block sizes. We need to calculate the offset from buffer start. |
3282 | */ | |
617ba13b | 3283 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3284 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3285 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3286 | } else { |
70bbb3e0 | 3287 | logical_sb_block = sb_block; |
ac27a0ec DK |
3288 | } |
3289 | ||
70bbb3e0 | 3290 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3291 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3292 | goto out_fail; |
3293 | } | |
3294 | /* | |
3295 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3296 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3297 | */ |
2716b802 | 3298 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3299 | sbi->s_es = es; |
3300 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3301 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3302 | goto cantfind_ext4; | |
afc32f7e | 3303 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3304 | |
feb0ab32 DW |
3305 | /* Warn if metadata_csum and gdt_csum are both set. */ |
3306 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3307 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
3308 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) | |
3309 | ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " | |
3310 | "redundant flags; please run fsck."); | |
3311 | ||
d25425f8 DW |
3312 | /* Check for a known checksum algorithm */ |
3313 | if (!ext4_verify_csum_type(sb, es)) { | |
3314 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3315 | "unknown checksum algorithm."); | |
3316 | silent = 1; | |
3317 | goto cantfind_ext4; | |
3318 | } | |
3319 | ||
0441984a DW |
3320 | /* Load the checksum driver */ |
3321 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3322 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3323 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
3324 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3325 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3326 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3327 | sbi->s_chksum_driver = NULL; | |
3328 | goto failed_mount; | |
3329 | } | |
3330 | } | |
3331 | ||
a9c47317 DW |
3332 | /* Check superblock checksum */ |
3333 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3334 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3335 | "invalid superblock checksum. Run e2fsck?"); | |
3336 | silent = 1; | |
3337 | goto cantfind_ext4; | |
3338 | } | |
3339 | ||
3340 | /* Precompute checksum seed for all metadata */ | |
3341 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3342 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
3343 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, | |
3344 | sizeof(es->s_uuid)); | |
3345 | ||
ac27a0ec DK |
3346 | /* Set defaults before we parse the mount options */ |
3347 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3348 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3349 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3350 | set_opt(sb, DEBUG); |
87f26807 | 3351 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3352 | set_opt(sb, GRPID); |
617ba13b | 3353 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3354 | set_opt(sb, NO_UID32); |
ea663336 | 3355 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3356 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3357 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3358 | #endif |
03010a33 | 3359 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3360 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3361 | #endif |
6fd7a467 | 3362 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3363 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3364 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3365 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3366 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3367 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3368 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3369 | |
3370 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3371 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3372 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3373 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3374 | else |
fd8c37ec | 3375 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3376 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3377 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3378 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3379 | set_opt(sb, DISCARD); |
ac27a0ec | 3380 | |
08cefc7a EB |
3381 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3382 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3383 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3384 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3385 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3386 | |
8b67f04a | 3387 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3388 | set_opt(sb, BARRIER); |
ac27a0ec | 3389 | |
dd919b98 AK |
3390 | /* |
3391 | * enable delayed allocation by default | |
3392 | * Use -o nodelalloc to turn it off | |
3393 | */ | |
8b67f04a TT |
3394 | if (!IS_EXT3_SB(sb) && |
3395 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3396 | set_opt(sb, DELALLOC); |
dd919b98 | 3397 | |
51ce6511 LC |
3398 | /* |
3399 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3400 | * no mount option specified. | |
3401 | */ | |
3402 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3403 | ||
8b67f04a | 3404 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3405 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3406 | ext4_msg(sb, KERN_WARNING, |
3407 | "failed to parse options in superblock: %s", | |
3408 | sbi->s_es->s_mount_opts); | |
3409 | } | |
5a916be1 | 3410 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3411 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3412 | &journal_ioprio, 0)) |
ac27a0ec DK |
3413 | goto failed_mount; |
3414 | ||
56889787 TT |
3415 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3416 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3417 | "with data=journal disables delayed " | |
3418 | "allocation and O_DIRECT support!\n"); | |
3419 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3420 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3421 | "both data=journal and delalloc"); | |
3422 | goto failed_mount; | |
3423 | } | |
3424 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3425 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3426 | "both data=journal and delalloc"); | |
3427 | goto failed_mount; | |
3428 | } | |
3429 | if (test_opt(sb, DELALLOC)) | |
3430 | clear_opt(sb, DELALLOC); | |
3431 | } | |
3432 | ||
3433 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
3434 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3435 | if (blocksize < PAGE_SIZE) { | |
3436 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3437 | "dioread_nolock if block size != PAGE_SIZE"); | |
3438 | goto failed_mount; | |
3439 | } | |
3440 | } | |
3441 | ||
ac27a0ec | 3442 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3443 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3444 | |
617ba13b MC |
3445 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3446 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3447 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3448 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3449 | ext4_msg(sb, KERN_WARNING, |
3450 | "feature flags set on rev 0 fs, " | |
3451 | "running e2fsck is recommended"); | |
469108ff | 3452 | |
2035e776 TT |
3453 | if (IS_EXT2_SB(sb)) { |
3454 | if (ext2_feature_set_ok(sb)) | |
3455 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3456 | "using the ext4 subsystem"); | |
3457 | else { | |
3458 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3459 | "to feature incompatibilities"); | |
3460 | goto failed_mount; | |
3461 | } | |
3462 | } | |
3463 | ||
3464 | if (IS_EXT3_SB(sb)) { | |
3465 | if (ext3_feature_set_ok(sb)) | |
3466 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3467 | "using the ext4 subsystem"); | |
3468 | else { | |
3469 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3470 | "to feature incompatibilities"); | |
3471 | goto failed_mount; | |
3472 | } | |
3473 | } | |
3474 | ||
ac27a0ec DK |
3475 | /* |
3476 | * Check feature flags regardless of the revision level, since we | |
3477 | * previously didn't change the revision level when setting the flags, | |
3478 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3479 | */ | |
a13fb1a4 | 3480 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3481 | goto failed_mount; |
a13fb1a4 | 3482 | |
617ba13b MC |
3483 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3484 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3485 | ext4_msg(sb, KERN_ERR, |
3486 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3487 | goto failed_mount; |
3488 | } | |
3489 | ||
ac27a0ec | 3490 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3491 | /* Validate the filesystem blocksize */ |
3492 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3493 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3494 | blocksize); |
ac27a0ec DK |
3495 | goto failed_mount; |
3496 | } | |
3497 | ||
2b2d6d01 | 3498 | brelse(bh); |
70bbb3e0 AM |
3499 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3500 | offset = do_div(logical_sb_block, blocksize); | |
3501 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3502 | if (!bh) { |
b31e1552 ES |
3503 | ext4_msg(sb, KERN_ERR, |
3504 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3505 | goto failed_mount; |
3506 | } | |
2716b802 | 3507 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3508 | sbi->s_es = es; |
617ba13b | 3509 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3510 | ext4_msg(sb, KERN_ERR, |
3511 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3512 | goto failed_mount; |
3513 | } | |
3514 | } | |
3515 | ||
a13fb1a4 ES |
3516 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3517 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3518 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3519 | has_huge_files); | |
3520 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3521 | |
617ba13b MC |
3522 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3523 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3524 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3525 | } else { |
3526 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3527 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3528 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3529 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3530 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3531 | ext4_msg(sb, KERN_ERR, |
3532 | "unsupported inode size: %d", | |
2b2d6d01 | 3533 | sbi->s_inode_size); |
ac27a0ec DK |
3534 | goto failed_mount; |
3535 | } | |
ef7f3835 KS |
3536 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3537 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3538 | } |
0b8e58a1 | 3539 | |
0d1ee42f AR |
3540 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3541 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3542 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3543 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3544 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3545 | ext4_msg(sb, KERN_ERR, |
3546 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3547 | sbi->s_desc_size); |
3548 | goto failed_mount; | |
3549 | } | |
3550 | } else | |
3551 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3552 | |
ac27a0ec | 3553 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3554 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3555 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3556 | goto cantfind_ext4; |
0b8e58a1 | 3557 | |
617ba13b | 3558 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3559 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3560 | goto cantfind_ext4; |
ac27a0ec DK |
3561 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3562 | sbi->s_inodes_per_block; | |
0d1ee42f | 3563 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3564 | sbi->s_sbh = bh; |
3565 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3566 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3567 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3568 | |
2b2d6d01 | 3569 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3570 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3571 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3572 | i = le32_to_cpu(es->s_flags); |
3573 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3574 | sbi->s_hash_unsigned = 3; | |
3575 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3576 | #ifdef __CHAR_UNSIGNED__ | |
3577 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3578 | sbi->s_hash_unsigned = 3; | |
3579 | #else | |
3580 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3581 | #endif | |
f99b2589 | 3582 | } |
ac27a0ec | 3583 | |
281b5995 TT |
3584 | /* Handle clustersize */ |
3585 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3586 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3587 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3588 | if (has_bigalloc) { | |
3589 | if (clustersize < blocksize) { | |
3590 | ext4_msg(sb, KERN_ERR, | |
3591 | "cluster size (%d) smaller than " | |
3592 | "block size (%d)", clustersize, blocksize); | |
3593 | goto failed_mount; | |
3594 | } | |
3595 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3596 | le32_to_cpu(es->s_log_block_size); | |
3597 | sbi->s_clusters_per_group = | |
3598 | le32_to_cpu(es->s_clusters_per_group); | |
3599 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3600 | ext4_msg(sb, KERN_ERR, | |
3601 | "#clusters per group too big: %lu", | |
3602 | sbi->s_clusters_per_group); | |
3603 | goto failed_mount; | |
3604 | } | |
3605 | if (sbi->s_blocks_per_group != | |
3606 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3607 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3608 | "clusters per group (%lu) inconsistent", | |
3609 | sbi->s_blocks_per_group, | |
3610 | sbi->s_clusters_per_group); | |
3611 | goto failed_mount; | |
3612 | } | |
3613 | } else { | |
3614 | if (clustersize != blocksize) { | |
3615 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3616 | "block size (%d)", clustersize, | |
3617 | blocksize); | |
3618 | clustersize = blocksize; | |
3619 | } | |
3620 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3621 | ext4_msg(sb, KERN_ERR, | |
3622 | "#blocks per group too big: %lu", | |
3623 | sbi->s_blocks_per_group); | |
3624 | goto failed_mount; | |
3625 | } | |
3626 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3627 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3628 | } |
281b5995 TT |
3629 | sbi->s_cluster_ratio = clustersize / blocksize; |
3630 | ||
ac27a0ec | 3631 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3632 | ext4_msg(sb, KERN_ERR, |
3633 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3634 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3635 | goto failed_mount; |
3636 | } | |
3637 | ||
bf43d84b ES |
3638 | /* |
3639 | * Test whether we have more sectors than will fit in sector_t, | |
3640 | * and whether the max offset is addressable by the page cache. | |
3641 | */ | |
5a9ae68a | 3642 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3643 | ext4_blocks_count(es)); |
5a9ae68a | 3644 | if (err) { |
b31e1552 | 3645 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3646 | " too large to mount safely on this system"); |
ac27a0ec | 3647 | if (sizeof(sector_t) < 8) |
90c699a9 | 3648 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3649 | ret = err; |
ac27a0ec DK |
3650 | goto failed_mount; |
3651 | } | |
3652 | ||
617ba13b MC |
3653 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3654 | goto cantfind_ext4; | |
e7c95593 | 3655 | |
0f2ddca6 FTN |
3656 | /* check blocks count against device size */ |
3657 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3658 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3659 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3660 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3661 | ext4_blocks_count(es), blocks_count); |
3662 | goto failed_mount; | |
3663 | } | |
3664 | ||
0b8e58a1 AD |
3665 | /* |
3666 | * It makes no sense for the first data block to be beyond the end | |
3667 | * of the filesystem. | |
3668 | */ | |
3669 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3670 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3671 | "block %u is beyond end of filesystem (%llu)", |
3672 | le32_to_cpu(es->s_first_data_block), | |
3673 | ext4_blocks_count(es)); | |
e7c95593 ES |
3674 | goto failed_mount; |
3675 | } | |
bd81d8ee LV |
3676 | blocks_count = (ext4_blocks_count(es) - |
3677 | le32_to_cpu(es->s_first_data_block) + | |
3678 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3679 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3680 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3681 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3682 | "(block count %llu, first data block %u, " |
b31e1552 | 3683 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3684 | ext4_blocks_count(es), |
3685 | le32_to_cpu(es->s_first_data_block), | |
3686 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3687 | goto failed_mount; | |
3688 | } | |
bd81d8ee | 3689 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3690 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3691 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3692 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3693 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3694 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3695 | sizeof(struct buffer_head *), | |
3696 | GFP_KERNEL); | |
ac27a0ec | 3697 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3698 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3699 | ret = -ENOMEM; |
ac27a0ec DK |
3700 | goto failed_mount; |
3701 | } | |
3702 | ||
9f6200bb TT |
3703 | if (ext4_proc_root) |
3704 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3705 | |
66acdcf4 TT |
3706 | if (sbi->s_proc) |
3707 | proc_create_data("options", S_IRUGO, sbi->s_proc, | |
3708 | &ext4_seq_options_fops, sb); | |
3709 | ||
705895b6 | 3710 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3711 | |
3712 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3713 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3714 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3715 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3716 | ext4_msg(sb, KERN_ERR, |
3717 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3718 | db_count = i; |
3719 | goto failed_mount2; | |
3720 | } | |
3721 | } | |
bfff6873 | 3722 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3723 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3724 | goto failed_mount2; |
3725 | } | |
772cb7c8 JS |
3726 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3727 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3728 | ext4_msg(sb, KERN_ERR, |
3729 | "unable to initialize " | |
3730 | "flex_bg meta info!"); | |
772cb7c8 JS |
3731 | goto failed_mount2; |
3732 | } | |
3733 | ||
ac27a0ec DK |
3734 | sbi->s_gdb_count = db_count; |
3735 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3736 | spin_lock_init(&sbi->s_next_gen_lock); | |
3737 | ||
04496411 TM |
3738 | init_timer(&sbi->s_err_report); |
3739 | sbi->s_err_report.function = print_daily_error_info; | |
3740 | sbi->s_err_report.data = (unsigned long) sb; | |
3741 | ||
57042651 | 3742 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3743 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3744 | if (!err) { |
3745 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3746 | ext4_count_free_inodes(sb)); | |
3747 | } | |
3748 | if (!err) { | |
3749 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3750 | ext4_count_dirs(sb)); | |
3751 | } | |
3752 | if (!err) { | |
57042651 | 3753 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a TT |
3754 | } |
3755 | if (err) { | |
3756 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
2cde417d | 3757 | ret = err; |
ce7e010a TT |
3758 | goto failed_mount3; |
3759 | } | |
3760 | ||
c9de560d | 3761 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3762 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3763 | |
ac27a0ec DK |
3764 | /* |
3765 | * set up enough so that it can read an inode | |
3766 | */ | |
9ca92389 TT |
3767 | if (!test_opt(sb, NOLOAD) && |
3768 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3769 | sb->s_op = &ext4_sops; | |
3770 | else | |
3771 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3772 | sb->s_export_op = &ext4_export_ops; |
3773 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3774 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3775 | sb->s_qcop = &ext4_qctl_operations; |
3776 | sb->dq_op = &ext4_quota_operations; | |
7c319d32 AK |
3777 | |
3778 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
3779 | /* Use qctl operations for hidden quota files. */ | |
3780 | sb->s_qcop = &ext4_qctl_sysfile_operations; | |
3781 | } | |
ac27a0ec | 3782 | #endif |
f2fa2ffc AK |
3783 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3784 | ||
ac27a0ec | 3785 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3786 | mutex_init(&sbi->s_orphan_lock); |
8f82f840 | 3787 | sbi->s_resize_flags = 0; |
ac27a0ec DK |
3788 | |
3789 | sb->s_root = NULL; | |
3790 | ||
3791 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3792 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3793 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3794 | |
c5e06d10 JL |
3795 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3796 | !(sb->s_flags & MS_RDONLY)) | |
3797 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3798 | goto failed_mount3; | |
3799 | ||
ac27a0ec DK |
3800 | /* |
3801 | * The first inode we look at is the journal inode. Don't try | |
3802 | * root first: it may be modified in the journal! | |
3803 | */ | |
3804 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3805 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3806 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3807 | goto failed_mount3; |
0390131b FM |
3808 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3809 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3810 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3811 | "suppressed and not mounted read-only"); | |
744692dc | 3812 | goto failed_mount_wq; |
ac27a0ec | 3813 | } else { |
fd8c37ec | 3814 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3815 | sbi->s_journal = NULL; |
3816 | needs_recovery = 0; | |
3817 | goto no_journal; | |
ac27a0ec DK |
3818 | } |
3819 | ||
f32aaf2d | 3820 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
eb40a09c JS |
3821 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3822 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3823 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3824 | goto failed_mount_wq; |
eb40a09c JS |
3825 | } |
3826 | ||
25ed6e8a DW |
3827 | if (!set_journal_csum_feature_set(sb)) { |
3828 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3829 | "feature set"); | |
3830 | goto failed_mount_wq; | |
d4da6c9c | 3831 | } |
818d276c | 3832 | |
ac27a0ec DK |
3833 | /* We have now updated the journal if required, so we can |
3834 | * validate the data journaling mode. */ | |
3835 | switch (test_opt(sb, DATA_FLAGS)) { | |
3836 | case 0: | |
3837 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3838 | * capabilities: ORDERED_DATA if the journal can |
3839 | * cope, else JOURNAL_DATA | |
3840 | */ | |
dab291af MC |
3841 | if (jbd2_journal_check_available_features |
3842 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3843 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3844 | else |
fd8c37ec | 3845 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3846 | break; |
3847 | ||
617ba13b MC |
3848 | case EXT4_MOUNT_ORDERED_DATA: |
3849 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3850 | if (!jbd2_journal_check_available_features |
3851 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3852 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3853 | "requested data journaling mode"); | |
744692dc | 3854 | goto failed_mount_wq; |
ac27a0ec DK |
3855 | } |
3856 | default: | |
3857 | break; | |
3858 | } | |
b3881f74 | 3859 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3860 | |
18aadd47 BJ |
3861 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3862 | ||
ce7e010a TT |
3863 | /* |
3864 | * The journal may have updated the bg summary counts, so we | |
3865 | * need to update the global counters. | |
3866 | */ | |
57042651 | 3867 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3868 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3869 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3870 | ext4_count_free_inodes(sb)); | |
3871 | percpu_counter_set(&sbi->s_dirs_counter, | |
3872 | ext4_count_dirs(sb)); | |
57042651 | 3873 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3874 | |
ce7e010a | 3875 | no_journal: |
952fc18e TT |
3876 | /* |
3877 | * Get the # of file system overhead blocks from the | |
3878 | * superblock if present. | |
3879 | */ | |
3880 | if (es->s_overhead_clusters) | |
3881 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3882 | else { | |
3883 | ret = ext4_calculate_overhead(sb); | |
3884 | if (ret) | |
3885 | goto failed_mount_wq; | |
3886 | } | |
3887 | ||
fd89d5f2 TH |
3888 | /* |
3889 | * The maximum number of concurrent works can be high and | |
3890 | * concurrency isn't really necessary. Limit it to 1. | |
3891 | */ | |
3892 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3893 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3894 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3895 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3896 | goto failed_mount_wq; | |
3897 | } | |
3898 | ||
ac27a0ec | 3899 | /* |
dab291af | 3900 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3901 | * so we can safely mount the rest of the filesystem now. |
3902 | */ | |
3903 | ||
1d1fe1ee DH |
3904 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3905 | if (IS_ERR(root)) { | |
b31e1552 | 3906 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3907 | ret = PTR_ERR(root); |
32a9bb57 | 3908 | root = NULL; |
ac27a0ec DK |
3909 | goto failed_mount4; |
3910 | } | |
3911 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3912 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3913 | iput(root); |
ac27a0ec DK |
3914 | goto failed_mount4; |
3915 | } | |
48fde701 | 3916 | sb->s_root = d_make_root(root); |
1d1fe1ee | 3917 | if (!sb->s_root) { |
b31e1552 | 3918 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3919 | ret = -ENOMEM; |
3920 | goto failed_mount4; | |
3921 | } | |
ac27a0ec | 3922 | |
7e84b621 ES |
3923 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
3924 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
3925 | |
3926 | /* determine the minimum size of new large inodes, if present */ | |
3927 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3928 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3929 | EXT4_GOOD_OLD_INODE_SIZE; | |
3930 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3931 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3932 | if (sbi->s_want_extra_isize < | |
3933 | le16_to_cpu(es->s_want_extra_isize)) | |
3934 | sbi->s_want_extra_isize = | |
3935 | le16_to_cpu(es->s_want_extra_isize); | |
3936 | if (sbi->s_want_extra_isize < | |
3937 | le16_to_cpu(es->s_min_extra_isize)) | |
3938 | sbi->s_want_extra_isize = | |
3939 | le16_to_cpu(es->s_min_extra_isize); | |
3940 | } | |
3941 | } | |
3942 | /* Check if enough inode space is available */ | |
3943 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3944 | sbi->s_inode_size) { | |
3945 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3946 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3947 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3948 | "available"); | |
ef7f3835 KS |
3949 | } |
3950 | ||
6fd058f7 TT |
3951 | err = ext4_setup_system_zone(sb); |
3952 | if (err) { | |
b31e1552 | 3953 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3954 | "zone (%d)", err); |
94bf608a | 3955 | goto failed_mount4a; |
6fd058f7 TT |
3956 | } |
3957 | ||
c2774d84 | 3958 | ext4_ext_init(sb); |
9d99012f | 3959 | err = ext4_mb_init(sb); |
c2774d84 | 3960 | if (err) { |
421f91d2 | 3961 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3962 | err); |
dcf2d804 | 3963 | goto failed_mount5; |
c2774d84 AK |
3964 | } |
3965 | ||
bfff6873 LC |
3966 | err = ext4_register_li_request(sb, first_not_zeroed); |
3967 | if (err) | |
dcf2d804 | 3968 | goto failed_mount6; |
bfff6873 | 3969 | |
3197ebdb TT |
3970 | sbi->s_kobj.kset = ext4_kset; |
3971 | init_completion(&sbi->s_kobj_unregister); | |
3972 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3973 | "%s", sb->s_id); | |
dcf2d804 TM |
3974 | if (err) |
3975 | goto failed_mount7; | |
3197ebdb | 3976 | |
617ba13b MC |
3977 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3978 | ext4_orphan_cleanup(sb, es); | |
3979 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3980 | if (needs_recovery) { |
b31e1552 | 3981 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3982 | ext4_mark_recovery_complete(sb, es); |
3983 | } | |
3984 | if (EXT4_SB(sb)->s_journal) { | |
3985 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3986 | descr = " journalled data mode"; | |
3987 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3988 | descr = " ordered data mode"; | |
3989 | else | |
3990 | descr = " writeback data mode"; | |
3991 | } else | |
3992 | descr = "out journal"; | |
3993 | ||
7c319d32 AK |
3994 | #ifdef CONFIG_QUOTA |
3995 | /* Enable quota usage during mount. */ | |
3996 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
3997 | !(sb->s_flags & MS_RDONLY)) { | |
3998 | ret = ext4_enable_quotas(sb); | |
3999 | if (ret) | |
4000 | goto failed_mount7; | |
4001 | } | |
4002 | #endif /* CONFIG_QUOTA */ | |
4003 | ||
d4c402d9 | 4004 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
4005 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
4006 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4007 | |
66e61a9e TT |
4008 | if (es->s_error_count) |
4009 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4010 | |
d4c402d9 | 4011 | kfree(orig_data); |
ac27a0ec DK |
4012 | return 0; |
4013 | ||
617ba13b | 4014 | cantfind_ext4: |
ac27a0ec | 4015 | if (!silent) |
b31e1552 | 4016 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4017 | goto failed_mount; |
4018 | ||
dcf2d804 TM |
4019 | failed_mount7: |
4020 | ext4_unregister_li_request(sb); | |
4021 | failed_mount6: | |
dcf2d804 | 4022 | ext4_mb_release(sb); |
94bf608a AV |
4023 | failed_mount5: |
4024 | ext4_ext_release(sb); | |
dcf2d804 | 4025 | ext4_release_system_zone(sb); |
94bf608a AV |
4026 | failed_mount4a: |
4027 | dput(sb->s_root); | |
32a9bb57 | 4028 | sb->s_root = NULL; |
94bf608a | 4029 | failed_mount4: |
b31e1552 | 4030 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
4031 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
4032 | failed_mount_wq: | |
0390131b FM |
4033 | if (sbi->s_journal) { |
4034 | jbd2_journal_destroy(sbi->s_journal); | |
4035 | sbi->s_journal = NULL; | |
4036 | } | |
ac27a0ec | 4037 | failed_mount3: |
04496411 | 4038 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
4039 | if (sbi->s_flex_groups) |
4040 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 4041 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
4042 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
4043 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 4044 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c5e06d10 JL |
4045 | if (sbi->s_mmp_tsk) |
4046 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4047 | failed_mount2: |
4048 | for (i = 0; i < db_count; i++) | |
4049 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 4050 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 4051 | failed_mount: |
0441984a DW |
4052 | if (sbi->s_chksum_driver) |
4053 | crypto_free_shash(sbi->s_chksum_driver); | |
240799cd | 4054 | if (sbi->s_proc) { |
66acdcf4 | 4055 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 4056 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 4057 | } |
ac27a0ec DK |
4058 | #ifdef CONFIG_QUOTA |
4059 | for (i = 0; i < MAXQUOTAS; i++) | |
4060 | kfree(sbi->s_qf_names[i]); | |
4061 | #endif | |
617ba13b | 4062 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4063 | brelse(bh); |
4064 | out_fail: | |
4065 | sb->s_fs_info = NULL; | |
f6830165 | 4066 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4067 | kfree(sbi); |
dcc7dae3 | 4068 | out_free_orig: |
d4c402d9 | 4069 | kfree(orig_data); |
1d1fe1ee | 4070 | return ret; |
ac27a0ec DK |
4071 | } |
4072 | ||
4073 | /* | |
4074 | * Setup any per-fs journal parameters now. We'll do this both on | |
4075 | * initial mount, once the journal has been initialised but before we've | |
4076 | * done any recovery; and again on any subsequent remount. | |
4077 | */ | |
617ba13b | 4078 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4079 | { |
617ba13b | 4080 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4081 | |
30773840 TT |
4082 | journal->j_commit_interval = sbi->s_commit_interval; |
4083 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4084 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4085 | |
a931da6a | 4086 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4087 | if (test_opt(sb, BARRIER)) |
dab291af | 4088 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4089 | else |
dab291af | 4090 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4091 | if (test_opt(sb, DATA_ERR_ABORT)) |
4092 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4093 | else | |
4094 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4095 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4096 | } |
4097 | ||
617ba13b | 4098 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4099 | unsigned int journal_inum) |
4100 | { | |
4101 | struct inode *journal_inode; | |
4102 | journal_t *journal; | |
4103 | ||
0390131b FM |
4104 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4105 | ||
ac27a0ec DK |
4106 | /* First, test for the existence of a valid inode on disk. Bad |
4107 | * things happen if we iget() an unused inode, as the subsequent | |
4108 | * iput() will try to delete it. */ | |
4109 | ||
1d1fe1ee DH |
4110 | journal_inode = ext4_iget(sb, journal_inum); |
4111 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4112 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4113 | return NULL; |
4114 | } | |
4115 | if (!journal_inode->i_nlink) { | |
4116 | make_bad_inode(journal_inode); | |
4117 | iput(journal_inode); | |
b31e1552 | 4118 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4119 | return NULL; |
4120 | } | |
4121 | ||
e5f8eab8 | 4122 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4123 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4124 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4125 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4126 | iput(journal_inode); |
4127 | return NULL; | |
4128 | } | |
4129 | ||
dab291af | 4130 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4131 | if (!journal) { |
b31e1552 | 4132 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4133 | iput(journal_inode); |
4134 | return NULL; | |
4135 | } | |
4136 | journal->j_private = sb; | |
617ba13b | 4137 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4138 | return journal; |
4139 | } | |
4140 | ||
617ba13b | 4141 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4142 | dev_t j_dev) |
4143 | { | |
2b2d6d01 | 4144 | struct buffer_head *bh; |
ac27a0ec | 4145 | journal_t *journal; |
617ba13b MC |
4146 | ext4_fsblk_t start; |
4147 | ext4_fsblk_t len; | |
ac27a0ec | 4148 | int hblock, blocksize; |
617ba13b | 4149 | ext4_fsblk_t sb_block; |
ac27a0ec | 4150 | unsigned long offset; |
2b2d6d01 | 4151 | struct ext4_super_block *es; |
ac27a0ec DK |
4152 | struct block_device *bdev; |
4153 | ||
0390131b FM |
4154 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4155 | ||
b31e1552 | 4156 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4157 | if (bdev == NULL) |
4158 | return NULL; | |
4159 | ||
ac27a0ec | 4160 | blocksize = sb->s_blocksize; |
e1defc4f | 4161 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4162 | if (blocksize < hblock) { |
b31e1552 ES |
4163 | ext4_msg(sb, KERN_ERR, |
4164 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4165 | goto out_bdev; |
4166 | } | |
4167 | ||
617ba13b MC |
4168 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4169 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4170 | set_blocksize(bdev, blocksize); |
4171 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4172 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4173 | "external journal"); | |
ac27a0ec DK |
4174 | goto out_bdev; |
4175 | } | |
4176 | ||
2716b802 | 4177 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4178 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4179 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4180 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4181 | ext4_msg(sb, KERN_ERR, "external journal has " |
4182 | "bad superblock"); | |
ac27a0ec DK |
4183 | brelse(bh); |
4184 | goto out_bdev; | |
4185 | } | |
4186 | ||
617ba13b | 4187 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4188 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4189 | brelse(bh); |
4190 | goto out_bdev; | |
4191 | } | |
4192 | ||
bd81d8ee | 4193 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4194 | start = sb_block + 1; |
4195 | brelse(bh); /* we're done with the superblock */ | |
4196 | ||
dab291af | 4197 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4198 | start, len, blocksize); |
4199 | if (!journal) { | |
b31e1552 | 4200 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4201 | goto out_bdev; |
4202 | } | |
4203 | journal->j_private = sb; | |
4204 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
4205 | wait_on_buffer(journal->j_sb_buffer); | |
4206 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4207 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4208 | goto out_journal; |
4209 | } | |
4210 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4211 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4212 | "user (unsupported) - %d", | |
ac27a0ec DK |
4213 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4214 | goto out_journal; | |
4215 | } | |
617ba13b MC |
4216 | EXT4_SB(sb)->journal_bdev = bdev; |
4217 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4218 | return journal; |
0b8e58a1 | 4219 | |
ac27a0ec | 4220 | out_journal: |
dab291af | 4221 | jbd2_journal_destroy(journal); |
ac27a0ec | 4222 | out_bdev: |
617ba13b | 4223 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4224 | return NULL; |
4225 | } | |
4226 | ||
617ba13b MC |
4227 | static int ext4_load_journal(struct super_block *sb, |
4228 | struct ext4_super_block *es, | |
ac27a0ec DK |
4229 | unsigned long journal_devnum) |
4230 | { | |
4231 | journal_t *journal; | |
4232 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4233 | dev_t journal_dev; | |
4234 | int err = 0; | |
4235 | int really_read_only; | |
4236 | ||
0390131b FM |
4237 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4238 | ||
ac27a0ec DK |
4239 | if (journal_devnum && |
4240 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4241 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4242 | "numbers have changed"); | |
ac27a0ec DK |
4243 | journal_dev = new_decode_dev(journal_devnum); |
4244 | } else | |
4245 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4246 | ||
4247 | really_read_only = bdev_read_only(sb->s_bdev); | |
4248 | ||
4249 | /* | |
4250 | * Are we loading a blank journal or performing recovery after a | |
4251 | * crash? For recovery, we need to check in advance whether we | |
4252 | * can get read-write access to the device. | |
4253 | */ | |
617ba13b | 4254 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4255 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4256 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4257 | "required on readonly filesystem"); | |
ac27a0ec | 4258 | if (really_read_only) { |
b31e1552 ES |
4259 | ext4_msg(sb, KERN_ERR, "write access " |
4260 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4261 | return -EROFS; |
4262 | } | |
b31e1552 ES |
4263 | ext4_msg(sb, KERN_INFO, "write access will " |
4264 | "be enabled during recovery"); | |
ac27a0ec DK |
4265 | } |
4266 | } | |
4267 | ||
4268 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4269 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4270 | "and inode journals!"); | |
ac27a0ec DK |
4271 | return -EINVAL; |
4272 | } | |
4273 | ||
4274 | if (journal_inum) { | |
617ba13b | 4275 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4276 | return -EINVAL; |
4277 | } else { | |
617ba13b | 4278 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4279 | return -EINVAL; |
4280 | } | |
4281 | ||
90576c0b | 4282 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4283 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4284 | |
617ba13b | 4285 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4286 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4287 | if (!err) { |
4288 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4289 | if (save) | |
4290 | memcpy(save, ((char *) es) + | |
4291 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4292 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4293 | if (save) |
4294 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4295 | save, EXT4_S_ERR_LEN); | |
4296 | kfree(save); | |
4297 | } | |
ac27a0ec DK |
4298 | |
4299 | if (err) { | |
b31e1552 | 4300 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4301 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4302 | return err; |
4303 | } | |
4304 | ||
617ba13b MC |
4305 | EXT4_SB(sb)->s_journal = journal; |
4306 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4307 | |
c41303ce | 4308 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4309 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4310 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4311 | |
4312 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4313 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4314 | } |
4315 | ||
4316 | return 0; | |
4317 | } | |
4318 | ||
e2d67052 | 4319 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4320 | { |
e2d67052 | 4321 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4322 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4323 | int error = 0; |
ac27a0ec | 4324 | |
7c2e7087 | 4325 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4326 | return error; |
914258bf TT |
4327 | if (buffer_write_io_error(sbh)) { |
4328 | /* | |
4329 | * Oh, dear. A previous attempt to write the | |
4330 | * superblock failed. This could happen because the | |
4331 | * USB device was yanked out. Or it could happen to | |
4332 | * be a transient write error and maybe the block will | |
4333 | * be remapped. Nothing we can do but to retry the | |
4334 | * write and hope for the best. | |
4335 | */ | |
b31e1552 ES |
4336 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4337 | "superblock detected"); | |
914258bf TT |
4338 | clear_buffer_write_io_error(sbh); |
4339 | set_buffer_uptodate(sbh); | |
4340 | } | |
71290b36 TT |
4341 | /* |
4342 | * If the file system is mounted read-only, don't update the | |
4343 | * superblock write time. This avoids updating the superblock | |
4344 | * write time when we are mounting the root file system | |
4345 | * read/only but we need to replay the journal; at that point, | |
4346 | * for people who are east of GMT and who make their clock | |
4347 | * tick in localtime for Windows bug-for-bug compatibility, | |
4348 | * the clock is set in the future, and this will cause e2fsck | |
4349 | * to complain and force a full file system check. | |
4350 | */ | |
4351 | if (!(sb->s_flags & MS_RDONLY)) | |
4352 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4353 | if (sb->s_bdev->bd_part) |
4354 | es->s_kbytes_written = | |
4355 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4356 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4357 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4358 | else |
4359 | es->s_kbytes_written = | |
4360 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4361 | ext4_free_blocks_count_set(es, |
4362 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4363 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4364 | es->s_free_inodes_count = |
4365 | cpu_to_le32(percpu_counter_sum_positive( | |
4366 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4367 | sb->s_dirt = 0; |
ac27a0ec | 4368 | BUFFER_TRACE(sbh, "marking dirty"); |
a9c47317 | 4369 | ext4_superblock_csum_set(sb, es); |
ac27a0ec | 4370 | mark_buffer_dirty(sbh); |
914258bf | 4371 | if (sync) { |
c4be0c1d TS |
4372 | error = sync_dirty_buffer(sbh); |
4373 | if (error) | |
4374 | return error; | |
4375 | ||
4376 | error = buffer_write_io_error(sbh); | |
4377 | if (error) { | |
b31e1552 ES |
4378 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4379 | "superblock"); | |
914258bf TT |
4380 | clear_buffer_write_io_error(sbh); |
4381 | set_buffer_uptodate(sbh); | |
4382 | } | |
4383 | } | |
c4be0c1d | 4384 | return error; |
ac27a0ec DK |
4385 | } |
4386 | ||
ac27a0ec DK |
4387 | /* |
4388 | * Have we just finished recovery? If so, and if we are mounting (or | |
4389 | * remounting) the filesystem readonly, then we will end up with a | |
4390 | * consistent fs on disk. Record that fact. | |
4391 | */ | |
2b2d6d01 TT |
4392 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4393 | struct ext4_super_block *es) | |
ac27a0ec | 4394 | { |
617ba13b | 4395 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4396 | |
0390131b FM |
4397 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4398 | BUG_ON(journal != NULL); | |
4399 | return; | |
4400 | } | |
dab291af | 4401 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4402 | if (jbd2_journal_flush(journal) < 0) |
4403 | goto out; | |
4404 | ||
617ba13b | 4405 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4406 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4407 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4408 | ext4_commit_super(sb, 1); |
ac27a0ec | 4409 | } |
7ffe1ea8 HK |
4410 | |
4411 | out: | |
dab291af | 4412 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4413 | } |
4414 | ||
4415 | /* | |
4416 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4417 | * has recorded an error from a previous lifetime, move that error to the | |
4418 | * main filesystem now. | |
4419 | */ | |
2b2d6d01 TT |
4420 | static void ext4_clear_journal_err(struct super_block *sb, |
4421 | struct ext4_super_block *es) | |
ac27a0ec DK |
4422 | { |
4423 | journal_t *journal; | |
4424 | int j_errno; | |
4425 | const char *errstr; | |
4426 | ||
0390131b FM |
4427 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4428 | ||
617ba13b | 4429 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4430 | |
4431 | /* | |
4432 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4433 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4434 | */ |
4435 | ||
dab291af | 4436 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4437 | if (j_errno) { |
4438 | char nbuf[16]; | |
4439 | ||
617ba13b | 4440 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4441 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4442 | "from previous mount: %s", errstr); |
12062ddd | 4443 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4444 | |
617ba13b MC |
4445 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4446 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4447 | ext4_commit_super(sb, 1); |
ac27a0ec | 4448 | |
dab291af | 4449 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4450 | } |
4451 | } | |
4452 | ||
4453 | /* | |
4454 | * Force the running and committing transactions to commit, | |
4455 | * and wait on the commit. | |
4456 | */ | |
617ba13b | 4457 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4458 | { |
4459 | journal_t *journal; | |
0390131b | 4460 | int ret = 0; |
ac27a0ec DK |
4461 | |
4462 | if (sb->s_flags & MS_RDONLY) | |
4463 | return 0; | |
4464 | ||
617ba13b | 4465 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4466 | if (journal) { |
437f88cc | 4467 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4468 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4469 | } |
0390131b | 4470 | |
ac27a0ec DK |
4471 | return ret; |
4472 | } | |
4473 | ||
2b2d6d01 | 4474 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4475 | { |
ebc1ac16 | 4476 | lock_super(sb); |
9ca92389 | 4477 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4478 | unlock_super(sb); |
ac27a0ec DK |
4479 | } |
4480 | ||
617ba13b | 4481 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4482 | { |
14ce0cb4 | 4483 | int ret = 0; |
9eddacf9 | 4484 | tid_t target; |
8d5d02e6 | 4485 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4486 | |
9bffad1e | 4487 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4488 | flush_workqueue(sbi->dio_unwritten_wq); |
4489 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4490 | if (wait) |
8d5d02e6 | 4491 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4492 | } |
14ce0cb4 | 4493 | return ret; |
ac27a0ec DK |
4494 | } |
4495 | ||
4496 | /* | |
4497 | * LVM calls this function before a (read-only) snapshot is created. This | |
4498 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4499 | * |
4500 | * Note that only this function cannot bring a filesystem to be in a clean | |
4501 | * state independently, because ext4 prevents a new handle from being started | |
4502 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from | |
4503 | * the upper layer. | |
ac27a0ec | 4504 | */ |
c4be0c1d | 4505 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4506 | { |
c4be0c1d TS |
4507 | int error = 0; |
4508 | journal_t *journal; | |
ac27a0ec | 4509 | |
9ca92389 TT |
4510 | if (sb->s_flags & MS_RDONLY) |
4511 | return 0; | |
ac27a0ec | 4512 | |
9ca92389 | 4513 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4514 | |
9ca92389 TT |
4515 | /* Now we set up the journal barrier. */ |
4516 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4517 | |
9ca92389 TT |
4518 | /* |
4519 | * Don't clear the needs_recovery flag if we failed to flush | |
4520 | * the journal. | |
4521 | */ | |
4522 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4523 | if (error < 0) |
4524 | goto out; | |
9ca92389 TT |
4525 | |
4526 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4527 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4528 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4529 | out: |
4530 | /* we rely on s_frozen to stop further updates */ | |
4531 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4532 | return error; | |
ac27a0ec DK |
4533 | } |
4534 | ||
4535 | /* | |
4536 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4537 | * flag here, even though the filesystem is not technically dirty yet. | |
4538 | */ | |
c4be0c1d | 4539 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4540 | { |
9ca92389 TT |
4541 | if (sb->s_flags & MS_RDONLY) |
4542 | return 0; | |
4543 | ||
4544 | lock_super(sb); | |
4545 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4546 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4547 | ext4_commit_super(sb, 1); | |
4548 | unlock_super(sb); | |
c4be0c1d | 4549 | return 0; |
ac27a0ec DK |
4550 | } |
4551 | ||
673c6100 TT |
4552 | /* |
4553 | * Structure to save mount options for ext4_remount's benefit | |
4554 | */ | |
4555 | struct ext4_mount_options { | |
4556 | unsigned long s_mount_opt; | |
a2595b8a | 4557 | unsigned long s_mount_opt2; |
08cefc7a EB |
4558 | kuid_t s_resuid; |
4559 | kgid_t s_resgid; | |
673c6100 TT |
4560 | unsigned long s_commit_interval; |
4561 | u32 s_min_batch_time, s_max_batch_time; | |
4562 | #ifdef CONFIG_QUOTA | |
4563 | int s_jquota_fmt; | |
4564 | char *s_qf_names[MAXQUOTAS]; | |
4565 | #endif | |
4566 | }; | |
4567 | ||
2b2d6d01 | 4568 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4569 | { |
2b2d6d01 | 4570 | struct ext4_super_block *es; |
617ba13b | 4571 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4572 | unsigned long old_sb_flags; |
617ba13b | 4573 | struct ext4_mount_options old_opts; |
c79d967d | 4574 | int enable_quota = 0; |
8a266467 | 4575 | ext4_group_t g; |
b3881f74 | 4576 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4577 | int err = 0; |
ac27a0ec DK |
4578 | #ifdef CONFIG_QUOTA |
4579 | int i; | |
4580 | #endif | |
d4c402d9 | 4581 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4582 | |
4583 | /* Store the original options */ | |
bbd6851a | 4584 | lock_super(sb); |
ac27a0ec DK |
4585 | old_sb_flags = sb->s_flags; |
4586 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4587 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4588 | old_opts.s_resuid = sbi->s_resuid; |
4589 | old_opts.s_resgid = sbi->s_resgid; | |
4590 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4591 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4592 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4593 | #ifdef CONFIG_QUOTA |
4594 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4595 | for (i = 0; i < MAXQUOTAS; i++) | |
4596 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4597 | #endif | |
b3881f74 TT |
4598 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4599 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4600 | |
4601 | /* | |
4602 | * Allow the "check" option to be passed as a remount option. | |
4603 | */ | |
661aa520 | 4604 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4605 | err = -EINVAL; |
4606 | goto restore_opts; | |
4607 | } | |
4608 | ||
4ab2f15b | 4609 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4610 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4611 | |
4612 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4613 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4614 | |
4615 | es = sbi->s_es; | |
4616 | ||
b3881f74 | 4617 | if (sbi->s_journal) { |
0390131b | 4618 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4619 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4620 | } | |
ac27a0ec | 4621 | |
661aa520 | 4622 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4623 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4624 | err = -EROFS; |
4625 | goto restore_opts; | |
4626 | } | |
4627 | ||
4628 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4629 | err = dquot_suspend(sb, -1); |
4630 | if (err < 0) | |
c79d967d | 4631 | goto restore_opts; |
c79d967d | 4632 | |
ac27a0ec DK |
4633 | /* |
4634 | * First of all, the unconditional stuff we have to do | |
4635 | * to disable replay of the journal when we next remount | |
4636 | */ | |
4637 | sb->s_flags |= MS_RDONLY; | |
4638 | ||
4639 | /* | |
4640 | * OK, test if we are remounting a valid rw partition | |
4641 | * readonly, and if so set the rdonly flag and then | |
4642 | * mark the partition as valid again. | |
4643 | */ | |
617ba13b MC |
4644 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4645 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4646 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4647 | ||
a63c9eb2 | 4648 | if (sbi->s_journal) |
0390131b | 4649 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4650 | } else { |
a13fb1a4 ES |
4651 | /* Make sure we can mount this feature set readwrite */ |
4652 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4653 | err = -EROFS; |
4654 | goto restore_opts; | |
4655 | } | |
8a266467 TT |
4656 | /* |
4657 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4658 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4659 | */ |
4660 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4661 | struct ext4_group_desc *gdp = | |
4662 | ext4_get_group_desc(sb, g, NULL); | |
4663 | ||
feb0ab32 | 4664 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4665 | ext4_msg(sb, KERN_ERR, |
4666 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4667 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4668 | le16_to_cpu(gdp->bg_checksum)); | |
4669 | err = -EINVAL; | |
4670 | goto restore_opts; | |
4671 | } | |
4672 | } | |
4673 | ||
ead6596b ES |
4674 | /* |
4675 | * If we have an unprocessed orphan list hanging | |
4676 | * around from a previously readonly bdev mount, | |
4677 | * require a full umount/remount for now. | |
4678 | */ | |
4679 | if (es->s_last_orphan) { | |
b31e1552 | 4680 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4681 | "remount RDWR because of unprocessed " |
4682 | "orphan inode list. Please " | |
b31e1552 | 4683 | "umount/remount instead"); |
ead6596b ES |
4684 | err = -EINVAL; |
4685 | goto restore_opts; | |
4686 | } | |
4687 | ||
ac27a0ec DK |
4688 | /* |
4689 | * Mounting a RDONLY partition read-write, so reread | |
4690 | * and store the current valid flag. (It may have | |
4691 | * been changed by e2fsck since we originally mounted | |
4692 | * the partition.) | |
4693 | */ | |
0390131b FM |
4694 | if (sbi->s_journal) |
4695 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4696 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4697 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4698 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4699 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4700 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4701 | if (ext4_multi_mount_protect(sb, | |
4702 | le64_to_cpu(es->s_mmp_block))) { | |
4703 | err = -EROFS; | |
4704 | goto restore_opts; | |
4705 | } | |
c79d967d | 4706 | enable_quota = 1; |
ac27a0ec DK |
4707 | } |
4708 | } | |
bfff6873 LC |
4709 | |
4710 | /* | |
4711 | * Reinitialize lazy itable initialization thread based on | |
4712 | * current settings | |
4713 | */ | |
4714 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4715 | ext4_unregister_li_request(sb); | |
4716 | else { | |
4717 | ext4_group_t first_not_zeroed; | |
4718 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4719 | ext4_register_li_request(sb, first_not_zeroed); | |
4720 | } | |
4721 | ||
6fd058f7 | 4722 | ext4_setup_system_zone(sb); |
0390131b | 4723 | if (sbi->s_journal == NULL) |
e2d67052 | 4724 | ext4_commit_super(sb, 1); |
0390131b | 4725 | |
7c319d32 | 4726 | unlock_super(sb); |
ac27a0ec DK |
4727 | #ifdef CONFIG_QUOTA |
4728 | /* Release old quota file names */ | |
4729 | for (i = 0; i < MAXQUOTAS; i++) | |
4730 | if (old_opts.s_qf_names[i] && | |
4731 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4732 | kfree(old_opts.s_qf_names[i]); | |
7c319d32 AK |
4733 | if (enable_quota) { |
4734 | if (sb_any_quota_suspended(sb)) | |
4735 | dquot_resume(sb, -1); | |
4736 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4737 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
4738 | err = ext4_enable_quotas(sb); | |
4739 | if (err) { | |
4740 | lock_super(sb); | |
4741 | goto restore_opts; | |
4742 | } | |
4743 | } | |
4744 | } | |
ac27a0ec | 4745 | #endif |
d4c402d9 CW |
4746 | |
4747 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4748 | kfree(orig_data); | |
ac27a0ec | 4749 | return 0; |
0b8e58a1 | 4750 | |
ac27a0ec DK |
4751 | restore_opts: |
4752 | sb->s_flags = old_sb_flags; | |
4753 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4754 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4755 | sbi->s_resuid = old_opts.s_resuid; |
4756 | sbi->s_resgid = old_opts.s_resgid; | |
4757 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4758 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4759 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4760 | #ifdef CONFIG_QUOTA |
4761 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4762 | for (i = 0; i < MAXQUOTAS; i++) { | |
4763 | if (sbi->s_qf_names[i] && | |
4764 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4765 | kfree(sbi->s_qf_names[i]); | |
4766 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4767 | } | |
4768 | #endif | |
bbd6851a | 4769 | unlock_super(sb); |
d4c402d9 | 4770 | kfree(orig_data); |
ac27a0ec DK |
4771 | return err; |
4772 | } | |
4773 | ||
2b2d6d01 | 4774 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4775 | { |
4776 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4777 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4778 | struct ext4_super_block *es = sbi->s_es; | |
952fc18e | 4779 | ext4_fsblk_t overhead = 0; |
960cc398 | 4780 | u64 fsid; |
d02a9391 | 4781 | s64 bfree; |
ac27a0ec | 4782 | |
952fc18e TT |
4783 | if (!test_opt(sb, MINIX_DF)) |
4784 | overhead = sbi->s_overhead; | |
ac27a0ec | 4785 | |
617ba13b | 4786 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4787 | buf->f_bsize = sb->s_blocksize; |
952fc18e | 4788 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); |
57042651 TT |
4789 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4790 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4791 | /* prevent underflow in case that few free space is available */ |
57042651 | 4792 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
bd81d8ee LV |
4793 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4794 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4795 | buf->f_bavail = 0; |
4796 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4797 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4798 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4799 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4800 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4801 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4802 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4803 | |
ac27a0ec DK |
4804 | return 0; |
4805 | } | |
4806 | ||
0b8e58a1 AD |
4807 | /* Helper function for writing quotas on sync - we need to start transaction |
4808 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4809 | * Process 1 Process 2 |
617ba13b | 4810 | * ext4_create() quota_sync() |
a269eb18 | 4811 | * jbd2_journal_start() write_dquot() |
871a2931 | 4812 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4813 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4814 | * |
4815 | */ | |
4816 | ||
4817 | #ifdef CONFIG_QUOTA | |
4818 | ||
4819 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4820 | { | |
4821 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4822 | } | |
4823 | ||
617ba13b | 4824 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4825 | { |
4826 | int ret, err; | |
4827 | handle_t *handle; | |
4828 | struct inode *inode; | |
4829 | ||
4830 | inode = dquot_to_inode(dquot); | |
617ba13b | 4831 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4832 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4833 | if (IS_ERR(handle)) |
4834 | return PTR_ERR(handle); | |
4835 | ret = dquot_commit(dquot); | |
617ba13b | 4836 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4837 | if (!ret) |
4838 | ret = err; | |
4839 | return ret; | |
4840 | } | |
4841 | ||
617ba13b | 4842 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4843 | { |
4844 | int ret, err; | |
4845 | handle_t *handle; | |
4846 | ||
617ba13b | 4847 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4848 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4849 | if (IS_ERR(handle)) |
4850 | return PTR_ERR(handle); | |
4851 | ret = dquot_acquire(dquot); | |
617ba13b | 4852 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4853 | if (!ret) |
4854 | ret = err; | |
4855 | return ret; | |
4856 | } | |
4857 | ||
617ba13b | 4858 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4859 | { |
4860 | int ret, err; | |
4861 | handle_t *handle; | |
4862 | ||
617ba13b | 4863 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4864 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4865 | if (IS_ERR(handle)) { |
4866 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4867 | dquot_release(dquot); | |
ac27a0ec | 4868 | return PTR_ERR(handle); |
9c3013e9 | 4869 | } |
ac27a0ec | 4870 | ret = dquot_release(dquot); |
617ba13b | 4871 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4872 | if (!ret) |
4873 | ret = err; | |
4874 | return ret; | |
4875 | } | |
4876 | ||
617ba13b | 4877 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4878 | { |
2c8be6b2 | 4879 | /* Are we journaling quotas? */ |
617ba13b MC |
4880 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4881 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4882 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4883 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4884 | } else { |
4885 | return dquot_mark_dquot_dirty(dquot); | |
4886 | } | |
4887 | } | |
4888 | ||
617ba13b | 4889 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4890 | { |
4891 | int ret, err; | |
4892 | handle_t *handle; | |
4893 | ||
4894 | /* Data block + inode block */ | |
617ba13b | 4895 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4896 | if (IS_ERR(handle)) |
4897 | return PTR_ERR(handle); | |
4898 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4899 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4900 | if (!ret) |
4901 | ret = err; | |
4902 | return ret; | |
4903 | } | |
4904 | ||
4905 | /* | |
4906 | * Turn on quotas during mount time - we need to find | |
4907 | * the quota file and such... | |
4908 | */ | |
617ba13b | 4909 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4910 | { |
287a8095 CH |
4911 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4912 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4913 | } |
4914 | ||
4915 | /* | |
4916 | * Standard function to be called on quota_on | |
4917 | */ | |
617ba13b | 4918 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4919 | struct path *path) |
ac27a0ec DK |
4920 | { |
4921 | int err; | |
ac27a0ec DK |
4922 | |
4923 | if (!test_opt(sb, QUOTA)) | |
4924 | return -EINVAL; | |
0623543b | 4925 | |
ac27a0ec | 4926 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 4927 | if (path->dentry->d_sb != sb) |
ac27a0ec | 4928 | return -EXDEV; |
0623543b JK |
4929 | /* Journaling quota? */ |
4930 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4931 | /* Quotafile not in fs root? */ |
f00c9e44 | 4932 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4933 | ext4_msg(sb, KERN_WARNING, |
4934 | "Quota file not on filesystem root. " | |
4935 | "Journaled quota will not work"); | |
2b2d6d01 | 4936 | } |
0623543b JK |
4937 | |
4938 | /* | |
4939 | * When we journal data on quota file, we have to flush journal to see | |
4940 | * all updates to the file when we bypass pagecache... | |
4941 | */ | |
0390131b | 4942 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4943 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4944 | /* |
4945 | * We don't need to lock updates but journal_flush() could | |
4946 | * otherwise be livelocked... | |
4947 | */ | |
4948 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4949 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4950 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4951 | if (err) |
7ffe1ea8 | 4952 | return err; |
0623543b JK |
4953 | } |
4954 | ||
f00c9e44 | 4955 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4956 | } |
4957 | ||
7c319d32 AK |
4958 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
4959 | unsigned int flags) | |
4960 | { | |
4961 | int err; | |
4962 | struct inode *qf_inode; | |
4963 | unsigned long qf_inums[MAXQUOTAS] = { | |
4964 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
4965 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
4966 | }; | |
4967 | ||
4968 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); | |
4969 | ||
4970 | if (!qf_inums[type]) | |
4971 | return -EPERM; | |
4972 | ||
4973 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
4974 | if (IS_ERR(qf_inode)) { | |
4975 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
4976 | return PTR_ERR(qf_inode); | |
4977 | } | |
4978 | ||
4979 | err = dquot_enable(qf_inode, type, format_id, flags); | |
4980 | iput(qf_inode); | |
4981 | ||
4982 | return err; | |
4983 | } | |
4984 | ||
4985 | /* Enable usage tracking for all quota types. */ | |
4986 | static int ext4_enable_quotas(struct super_block *sb) | |
4987 | { | |
4988 | int type, err = 0; | |
4989 | unsigned long qf_inums[MAXQUOTAS] = { | |
4990 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
4991 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
4992 | }; | |
4993 | ||
4994 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
4995 | for (type = 0; type < MAXQUOTAS; type++) { | |
4996 | if (qf_inums[type]) { | |
4997 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
4998 | DQUOT_USAGE_ENABLED); | |
4999 | if (err) { | |
5000 | ext4_warning(sb, | |
5001 | "Failed to enable quota (type=%d) " | |
5002 | "tracking. Please run e2fsck to fix.", | |
5003 | type); | |
5004 | return err; | |
5005 | } | |
5006 | } | |
5007 | } | |
5008 | return 0; | |
5009 | } | |
5010 | ||
5011 | /* | |
5012 | * quota_on function that is used when QUOTA feature is set. | |
5013 | */ | |
5014 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, | |
5015 | int format_id) | |
5016 | { | |
5017 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5018 | return -EINVAL; | |
5019 | ||
5020 | /* | |
5021 | * USAGE was enabled at mount time. Only need to enable LIMITS now. | |
5022 | */ | |
5023 | return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); | |
5024 | } | |
5025 | ||
ca0e05e4 DM |
5026 | static int ext4_quota_off(struct super_block *sb, int type) |
5027 | { | |
21f97697 JK |
5028 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5029 | handle_t *handle; | |
5030 | ||
87009d86 DM |
5031 | /* Force all delayed allocation blocks to be allocated. |
5032 | * Caller already holds s_umount sem */ | |
5033 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5034 | sync_filesystem(sb); |
ca0e05e4 | 5035 | |
0b268590 AG |
5036 | if (!inode) |
5037 | goto out; | |
5038 | ||
21f97697 JK |
5039 | /* Update modification times of quota files when userspace can |
5040 | * start looking at them */ | |
5041 | handle = ext4_journal_start(inode, 1); | |
5042 | if (IS_ERR(handle)) | |
5043 | goto out; | |
5044 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5045 | ext4_mark_inode_dirty(handle, inode); | |
5046 | ext4_journal_stop(handle); | |
5047 | ||
5048 | out: | |
ca0e05e4 DM |
5049 | return dquot_quota_off(sb, type); |
5050 | } | |
5051 | ||
7c319d32 AK |
5052 | /* |
5053 | * quota_off function that is used when QUOTA feature is set. | |
5054 | */ | |
5055 | static int ext4_quota_off_sysfile(struct super_block *sb, int type) | |
5056 | { | |
5057 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5058 | return -EINVAL; | |
5059 | ||
5060 | /* Disable only the limits. */ | |
5061 | return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); | |
5062 | } | |
5063 | ||
ac27a0ec DK |
5064 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5065 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5066 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5067 | * we don't have to be afraid of races */ |
617ba13b | 5068 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5069 | size_t len, loff_t off) |
5070 | { | |
5071 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5072 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5073 | int err = 0; |
5074 | int offset = off & (sb->s_blocksize - 1); | |
5075 | int tocopy; | |
5076 | size_t toread; | |
5077 | struct buffer_head *bh; | |
5078 | loff_t i_size = i_size_read(inode); | |
5079 | ||
5080 | if (off > i_size) | |
5081 | return 0; | |
5082 | if (off+len > i_size) | |
5083 | len = i_size-off; | |
5084 | toread = len; | |
5085 | while (toread > 0) { | |
5086 | tocopy = sb->s_blocksize - offset < toread ? | |
5087 | sb->s_blocksize - offset : toread; | |
617ba13b | 5088 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
5089 | if (err) |
5090 | return err; | |
5091 | if (!bh) /* A hole? */ | |
5092 | memset(data, 0, tocopy); | |
5093 | else | |
5094 | memcpy(data, bh->b_data+offset, tocopy); | |
5095 | brelse(bh); | |
5096 | offset = 0; | |
5097 | toread -= tocopy; | |
5098 | data += tocopy; | |
5099 | blk++; | |
5100 | } | |
5101 | return len; | |
5102 | } | |
5103 | ||
5104 | /* Write to quotafile (we know the transaction is already started and has | |
5105 | * enough credits) */ | |
617ba13b | 5106 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5107 | const char *data, size_t len, loff_t off) |
5108 | { | |
5109 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5110 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5111 | int err = 0; |
5112 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
5113 | struct buffer_head *bh; |
5114 | handle_t *handle = journal_current_handle(); | |
5115 | ||
0390131b | 5116 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5117 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5118 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5119 | (unsigned long long)off, (unsigned long long)len); |
5120 | return -EIO; | |
5121 | } | |
67eeb568 DM |
5122 | /* |
5123 | * Since we account only one data block in transaction credits, | |
5124 | * then it is impossible to cross a block boundary. | |
5125 | */ | |
5126 | if (sb->s_blocksize - offset < len) { | |
5127 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5128 | " cancelled because not block aligned", | |
5129 | (unsigned long long)off, (unsigned long long)len); | |
5130 | return -EIO; | |
5131 | } | |
5132 | ||
67eeb568 DM |
5133 | bh = ext4_bread(handle, inode, blk, 1, &err); |
5134 | if (!bh) | |
5135 | goto out; | |
62d2b5f2 JK |
5136 | err = ext4_journal_get_write_access(handle, bh); |
5137 | if (err) { | |
5138 | brelse(bh); | |
5139 | goto out; | |
ac27a0ec | 5140 | } |
67eeb568 DM |
5141 | lock_buffer(bh); |
5142 | memcpy(bh->b_data+offset, data, len); | |
5143 | flush_dcache_page(bh->b_page); | |
5144 | unlock_buffer(bh); | |
62d2b5f2 | 5145 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5146 | brelse(bh); |
ac27a0ec | 5147 | out: |
0b7f7cef | 5148 | if (err) |
ac27a0ec | 5149 | return err; |
67eeb568 DM |
5150 | if (inode->i_size < off + len) { |
5151 | i_size_write(inode, off + len); | |
617ba13b | 5152 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5153 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5154 | } |
67eeb568 | 5155 | return len; |
ac27a0ec DK |
5156 | } |
5157 | ||
5158 | #endif | |
5159 | ||
152a0836 AV |
5160 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5161 | const char *dev_name, void *data) | |
ac27a0ec | 5162 | { |
152a0836 | 5163 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5164 | } |
5165 | ||
37f328eb | 5166 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5167 | static inline void register_as_ext2(void) |
5168 | { | |
5169 | int err = register_filesystem(&ext2_fs_type); | |
5170 | if (err) | |
5171 | printk(KERN_WARNING | |
5172 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5173 | } | |
5174 | ||
5175 | static inline void unregister_as_ext2(void) | |
5176 | { | |
5177 | unregister_filesystem(&ext2_fs_type); | |
5178 | } | |
2035e776 TT |
5179 | |
5180 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5181 | { | |
5182 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
5183 | return 0; | |
5184 | if (sb->s_flags & MS_RDONLY) | |
5185 | return 1; | |
5186 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
5187 | return 0; | |
5188 | return 1; | |
5189 | } | |
51b7e3c9 | 5190 | MODULE_ALIAS("ext2"); |
24b58424 TT |
5191 | #else |
5192 | static inline void register_as_ext2(void) { } | |
5193 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5194 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5195 | #endif |
5196 | ||
37f328eb | 5197 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5198 | static inline void register_as_ext3(void) |
5199 | { | |
5200 | int err = register_filesystem(&ext3_fs_type); | |
5201 | if (err) | |
5202 | printk(KERN_WARNING | |
5203 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5204 | } | |
5205 | ||
5206 | static inline void unregister_as_ext3(void) | |
5207 | { | |
5208 | unregister_filesystem(&ext3_fs_type); | |
5209 | } | |
2035e776 TT |
5210 | |
5211 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5212 | { | |
5213 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
5214 | return 0; | |
5215 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
5216 | return 0; | |
5217 | if (sb->s_flags & MS_RDONLY) | |
5218 | return 1; | |
5219 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5220 | return 0; | |
5221 | return 1; | |
5222 | } | |
51b7e3c9 | 5223 | MODULE_ALIAS("ext3"); |
24b58424 TT |
5224 | #else |
5225 | static inline void register_as_ext3(void) { } | |
5226 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5227 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5228 | #endif |
5229 | ||
03010a33 TT |
5230 | static struct file_system_type ext4_fs_type = { |
5231 | .owner = THIS_MODULE, | |
5232 | .name = "ext4", | |
152a0836 | 5233 | .mount = ext4_mount, |
03010a33 TT |
5234 | .kill_sb = kill_block_super, |
5235 | .fs_flags = FS_REQUIRES_DEV, | |
5236 | }; | |
5237 | ||
8f021222 | 5238 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5239 | { |
5240 | struct ext4_features *ef; | |
5241 | int ret = -ENOMEM; | |
5242 | ||
5243 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5244 | if (!ef) | |
5245 | goto out; | |
5246 | ||
5247 | ef->f_kobj.kset = ext4_kset; | |
5248 | init_completion(&ef->f_kobj_unregister); | |
5249 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5250 | "features"); | |
5251 | if (ret) { | |
5252 | kfree(ef); | |
5253 | goto out; | |
5254 | } | |
5255 | ||
5256 | ext4_feat = ef; | |
5257 | ret = 0; | |
5258 | out: | |
5259 | return ret; | |
5260 | } | |
5261 | ||
8f021222 LC |
5262 | static void ext4_exit_feat_adverts(void) |
5263 | { | |
5264 | kobject_put(&ext4_feat->f_kobj); | |
5265 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5266 | kfree(ext4_feat); | |
5267 | } | |
5268 | ||
e9e3bcec ES |
5269 | /* Shared across all ext4 file systems */ |
5270 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5271 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5272 | ||
5dabfc78 | 5273 | static int __init ext4_init_fs(void) |
ac27a0ec | 5274 | { |
e9e3bcec | 5275 | int i, err; |
c9de560d | 5276 | |
07c0c5d8 AV |
5277 | ext4_li_info = NULL; |
5278 | mutex_init(&ext4_li_mtx); | |
5279 | ||
12e9b892 | 5280 | ext4_check_flag_values(); |
e9e3bcec ES |
5281 | |
5282 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5283 | mutex_init(&ext4__aio_mutex[i]); | |
5284 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5285 | } | |
5286 | ||
5dabfc78 | 5287 | err = ext4_init_pageio(); |
6fd058f7 TT |
5288 | if (err) |
5289 | return err; | |
5dabfc78 | 5290 | err = ext4_init_system_zone(); |
bd2d0210 | 5291 | if (err) |
d44651d0 | 5292 | goto out6; |
3197ebdb TT |
5293 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
5294 | if (!ext4_kset) | |
dd68314c | 5295 | goto out5; |
d44651d0 | 5296 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5297 | |
5298 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5299 | if (err) |
5300 | goto out4; | |
857ac889 | 5301 | |
5dabfc78 | 5302 | err = ext4_init_mballoc(); |
ac27a0ec | 5303 | if (err) |
6fd058f7 | 5304 | goto out3; |
c9de560d | 5305 | |
5dabfc78 | 5306 | err = ext4_init_xattr(); |
c9de560d AT |
5307 | if (err) |
5308 | goto out2; | |
ac27a0ec DK |
5309 | err = init_inodecache(); |
5310 | if (err) | |
5311 | goto out1; | |
24b58424 | 5312 | register_as_ext3(); |
2035e776 | 5313 | register_as_ext2(); |
03010a33 | 5314 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5315 | if (err) |
5316 | goto out; | |
bfff6873 | 5317 | |
ac27a0ec DK |
5318 | return 0; |
5319 | out: | |
24b58424 TT |
5320 | unregister_as_ext2(); |
5321 | unregister_as_ext3(); | |
ac27a0ec DK |
5322 | destroy_inodecache(); |
5323 | out1: | |
5dabfc78 | 5324 | ext4_exit_xattr(); |
c9de560d | 5325 | out2: |
5dabfc78 | 5326 | ext4_exit_mballoc(); |
6fd058f7 | 5327 | out3: |
8f021222 | 5328 | ext4_exit_feat_adverts(); |
dd68314c | 5329 | out4: |
d44651d0 FJ |
5330 | if (ext4_proc_root) |
5331 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5332 | kset_unregister(ext4_kset); |
d44651d0 | 5333 | out5: |
5dabfc78 | 5334 | ext4_exit_system_zone(); |
d44651d0 | 5335 | out6: |
5dabfc78 | 5336 | ext4_exit_pageio(); |
ac27a0ec DK |
5337 | return err; |
5338 | } | |
5339 | ||
5dabfc78 | 5340 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5341 | { |
bfff6873 | 5342 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5343 | unregister_as_ext2(); |
5344 | unregister_as_ext3(); | |
03010a33 | 5345 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5346 | destroy_inodecache(); |
5dabfc78 TT |
5347 | ext4_exit_xattr(); |
5348 | ext4_exit_mballoc(); | |
8f021222 | 5349 | ext4_exit_feat_adverts(); |
9f6200bb | 5350 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5351 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5352 | ext4_exit_system_zone(); |
5353 | ext4_exit_pageio(); | |
ac27a0ec DK |
5354 | } |
5355 | ||
5356 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5357 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5358 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5359 | module_init(ext4_init_fs) |
5360 | module_exit(ext4_exit_fs) |