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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
7abc52c2 | 41 | #include <linux/cleancache.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
bfff6873 LC |
44 | #include <linux/kthread.h> |
45 | #include <linux/freezer.h> | |
46 | ||
3dcf5451 | 47 | #include "ext4.h" |
6f91bc5f | 48 | #include "ext4_extents.h" |
3dcf5451 | 49 | #include "ext4_jbd2.h" |
ac27a0ec DK |
50 | #include "xattr.h" |
51 | #include "acl.h" | |
3661d286 | 52 | #include "mballoc.h" |
ac27a0ec | 53 | |
9bffad1e TT |
54 | #define CREATE_TRACE_POINTS |
55 | #include <trace/events/ext4.h> | |
56 | ||
1f109d5a | 57 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 58 | static struct kset *ext4_kset; |
0b75a840 LC |
59 | static struct ext4_lazy_init *ext4_li_info; |
60 | static struct mutex ext4_li_mtx; | |
61 | static struct ext4_features *ext4_feat; | |
9f6200bb | 62 | |
617ba13b | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 64 | unsigned long journal_devnum); |
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); |
c4be0c1d | 77 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
78 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
79 | const char *dev_name, void *data); | |
2035e776 TT |
80 | static inline int ext2_feature_set_ok(struct super_block *sb); |
81 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 82 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
83 | static void ext4_destroy_lazyinit_thread(void); |
84 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 85 | static void ext4_clear_request_list(void); |
ac27a0ec | 86 | |
2035e776 TT |
87 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
88 | static struct file_system_type ext2_fs_type = { | |
89 | .owner = THIS_MODULE, | |
90 | .name = "ext2", | |
91 | .mount = ext4_mount, | |
92 | .kill_sb = kill_block_super, | |
93 | .fs_flags = FS_REQUIRES_DEV, | |
94 | }; | |
95 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) | |
96 | #else | |
97 | #define IS_EXT2_SB(sb) (0) | |
98 | #endif | |
99 | ||
100 | ||
ba69f9ab JK |
101 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
102 | static struct file_system_type ext3_fs_type = { | |
103 | .owner = THIS_MODULE, | |
104 | .name = "ext3", | |
152a0836 | 105 | .mount = ext4_mount, |
ba69f9ab JK |
106 | .kill_sb = kill_block_super, |
107 | .fs_flags = FS_REQUIRES_DEV, | |
108 | }; | |
109 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
110 | #else | |
111 | #define IS_EXT3_SB(sb) (0) | |
112 | #endif | |
bd81d8ee | 113 | |
d25425f8 DW |
114 | static int ext4_verify_csum_type(struct super_block *sb, |
115 | struct ext4_super_block *es) | |
116 | { | |
117 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
118 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
119 | return 1; | |
120 | ||
121 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
122 | } | |
123 | ||
a9c47317 DW |
124 | static __le32 ext4_superblock_csum(struct super_block *sb, |
125 | struct ext4_super_block *es) | |
126 | { | |
127 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
128 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
129 | __u32 csum; | |
130 | ||
131 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
132 | ||
133 | return cpu_to_le32(csum); | |
134 | } | |
135 | ||
136 | int ext4_superblock_csum_verify(struct super_block *sb, | |
137 | struct ext4_super_block *es) | |
138 | { | |
139 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
140 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
141 | return 1; | |
142 | ||
143 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
144 | } | |
145 | ||
146 | void ext4_superblock_csum_set(struct super_block *sb, | |
147 | struct ext4_super_block *es) | |
148 | { | |
149 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
150 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
151 | return; | |
152 | ||
153 | es->s_checksum = ext4_superblock_csum(sb, es); | |
154 | } | |
155 | ||
9933fc0a TT |
156 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
157 | { | |
158 | void *ret; | |
159 | ||
160 | ret = kmalloc(size, flags); | |
161 | if (!ret) | |
162 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
163 | return ret; | |
164 | } | |
165 | ||
166 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
167 | { | |
168 | void *ret; | |
169 | ||
db9481c0 | 170 | ret = kzalloc(size, flags); |
9933fc0a TT |
171 | if (!ret) |
172 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | void ext4_kvfree(void *ptr) | |
177 | { | |
178 | if (is_vmalloc_addr(ptr)) | |
179 | vfree(ptr); | |
180 | else | |
181 | kfree(ptr); | |
182 | ||
183 | } | |
184 | ||
8fadc143 AR |
185 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
186 | struct ext4_group_desc *bg) | |
bd81d8ee | 187 | { |
3a14589c | 188 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 189 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 190 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
191 | } |
192 | ||
8fadc143 AR |
193 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
194 | struct ext4_group_desc *bg) | |
bd81d8ee | 195 | { |
5272f837 | 196 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 197 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 198 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
199 | } |
200 | ||
8fadc143 AR |
201 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
202 | struct ext4_group_desc *bg) | |
bd81d8ee | 203 | { |
5272f837 | 204 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 205 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 206 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
207 | } |
208 | ||
021b65bb TT |
209 | __u32 ext4_free_group_clusters(struct super_block *sb, |
210 | struct ext4_group_desc *bg) | |
560671a0 AK |
211 | { |
212 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
213 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 214 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
215 | } |
216 | ||
217 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
218 | struct ext4_group_desc *bg) | |
219 | { | |
220 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
221 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 222 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
223 | } |
224 | ||
225 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
226 | struct ext4_group_desc *bg) | |
227 | { | |
228 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
229 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 230 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
231 | } |
232 | ||
233 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
234 | struct ext4_group_desc *bg) | |
235 | { | |
236 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
237 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 238 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
239 | } |
240 | ||
8fadc143 AR |
241 | void ext4_block_bitmap_set(struct super_block *sb, |
242 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 243 | { |
3a14589c | 244 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
245 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
246 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
247 | } |
248 | ||
8fadc143 AR |
249 | void ext4_inode_bitmap_set(struct super_block *sb, |
250 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 251 | { |
5272f837 | 252 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
253 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
254 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
255 | } |
256 | ||
8fadc143 AR |
257 | void ext4_inode_table_set(struct super_block *sb, |
258 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 259 | { |
5272f837 | 260 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
261 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
262 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
263 | } |
264 | ||
021b65bb TT |
265 | void ext4_free_group_clusters_set(struct super_block *sb, |
266 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
267 | { |
268 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
269 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
270 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
271 | } | |
272 | ||
273 | void ext4_free_inodes_set(struct super_block *sb, | |
274 | struct ext4_group_desc *bg, __u32 count) | |
275 | { | |
276 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
277 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
278 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
279 | } | |
280 | ||
281 | void ext4_used_dirs_set(struct super_block *sb, | |
282 | struct ext4_group_desc *bg, __u32 count) | |
283 | { | |
284 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
285 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
286 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
287 | } | |
288 | ||
289 | void ext4_itable_unused_set(struct super_block *sb, | |
290 | struct ext4_group_desc *bg, __u32 count) | |
291 | { | |
292 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
293 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
294 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
295 | } | |
296 | ||
d3d1faf6 CW |
297 | |
298 | /* Just increment the non-pointer handle value */ | |
299 | static handle_t *ext4_get_nojournal(void) | |
300 | { | |
301 | handle_t *handle = current->journal_info; | |
302 | unsigned long ref_cnt = (unsigned long)handle; | |
303 | ||
304 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
305 | ||
306 | ref_cnt++; | |
307 | handle = (handle_t *)ref_cnt; | |
308 | ||
309 | current->journal_info = handle; | |
310 | return handle; | |
311 | } | |
312 | ||
313 | ||
314 | /* Decrement the non-pointer handle value */ | |
315 | static void ext4_put_nojournal(handle_t *handle) | |
316 | { | |
317 | unsigned long ref_cnt = (unsigned long)handle; | |
318 | ||
319 | BUG_ON(ref_cnt == 0); | |
320 | ||
321 | ref_cnt--; | |
322 | handle = (handle_t *)ref_cnt; | |
323 | ||
324 | current->journal_info = handle; | |
325 | } | |
326 | ||
ac27a0ec | 327 | /* |
dab291af | 328 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
329 | * |
330 | * The only special thing we need to do here is to make sure that all | |
331 | * journal_end calls result in the superblock being marked dirty, so | |
332 | * that sync() will call the filesystem's write_super callback if | |
333 | * appropriate. | |
334 | */ | |
617ba13b | 335 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
336 | { |
337 | journal_t *journal; | |
338 | ||
12706394 | 339 | trace_ext4_journal_start(sb, nblocks, _RET_IP_); |
ac27a0ec DK |
340 | if (sb->s_flags & MS_RDONLY) |
341 | return ERR_PTR(-EROFS); | |
342 | ||
8e8ad8a5 | 343 | WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); |
617ba13b | 344 | journal = EXT4_SB(sb)->s_journal; |
be4f27d3 YY |
345 | if (!journal) |
346 | return ext4_get_nojournal(); | |
347 | /* | |
348 | * Special case here: if the journal has aborted behind our | |
349 | * backs (eg. EIO in the commit thread), then we still need to | |
350 | * take the FS itself readonly cleanly. | |
351 | */ | |
352 | if (is_journal_aborted(journal)) { | |
353 | ext4_abort(sb, "Detected aborted journal"); | |
354 | return ERR_PTR(-EROFS); | |
ac27a0ec | 355 | } |
be4f27d3 | 356 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
357 | } |
358 | ||
359 | /* | |
360 | * The only special thing we need to do here is to make sure that all | |
dab291af | 361 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
362 | * that sync() will call the filesystem's write_super callback if |
363 | * appropriate. | |
364 | */ | |
c398eda0 | 365 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
366 | { |
367 | struct super_block *sb; | |
368 | int err; | |
369 | int rc; | |
370 | ||
0390131b | 371 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 372 | ext4_put_nojournal(handle); |
0390131b FM |
373 | return 0; |
374 | } | |
ac27a0ec DK |
375 | sb = handle->h_transaction->t_journal->j_private; |
376 | err = handle->h_err; | |
dab291af | 377 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
378 | |
379 | if (!err) | |
380 | err = rc; | |
381 | if (err) | |
c398eda0 | 382 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
383 | return err; |
384 | } | |
385 | ||
90c7201b TT |
386 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
387 | const char *err_fn, struct buffer_head *bh, | |
388 | handle_t *handle, int err) | |
ac27a0ec DK |
389 | { |
390 | char nbuf[16]; | |
617ba13b | 391 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 392 | |
0390131b FM |
393 | BUG_ON(!ext4_handle_valid(handle)); |
394 | ||
ac27a0ec DK |
395 | if (bh) |
396 | BUFFER_TRACE(bh, "abort"); | |
397 | ||
398 | if (!handle->h_err) | |
399 | handle->h_err = err; | |
400 | ||
401 | if (is_handle_aborted(handle)) | |
402 | return; | |
403 | ||
92b97816 | 404 | printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", |
90c7201b | 405 | caller, line, errstr, err_fn); |
ac27a0ec | 406 | |
dab291af | 407 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
408 | } |
409 | ||
1c13d5c0 TT |
410 | static void __save_error_info(struct super_block *sb, const char *func, |
411 | unsigned int line) | |
412 | { | |
413 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
414 | ||
415 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
416 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
417 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
418 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
419 | es->s_last_error_line = cpu_to_le32(line); | |
420 | if (!es->s_first_error_time) { | |
421 | es->s_first_error_time = es->s_last_error_time; | |
422 | strncpy(es->s_first_error_func, func, | |
423 | sizeof(es->s_first_error_func)); | |
424 | es->s_first_error_line = cpu_to_le32(line); | |
425 | es->s_first_error_ino = es->s_last_error_ino; | |
426 | es->s_first_error_block = es->s_last_error_block; | |
427 | } | |
66e61a9e TT |
428 | /* |
429 | * Start the daily error reporting function if it hasn't been | |
430 | * started already | |
431 | */ | |
432 | if (!es->s_error_count) | |
433 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
434 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
435 | } | |
436 | ||
437 | static void save_error_info(struct super_block *sb, const char *func, | |
438 | unsigned int line) | |
439 | { | |
440 | __save_error_info(sb, func, line); | |
441 | ext4_commit_super(sb, 1); | |
442 | } | |
443 | ||
7c2e7087 TT |
444 | /* |
445 | * The del_gendisk() function uninitializes the disk-specific data | |
446 | * structures, including the bdi structure, without telling anyone | |
447 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
448 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
449 | * This is a kludge to prevent these oops until we can put in a proper | |
450 | * hook in del_gendisk() to inform the VFS and file system layers. | |
451 | */ | |
452 | static int block_device_ejected(struct super_block *sb) | |
453 | { | |
454 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
455 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; | |
456 | ||
457 | return bdi->dev == NULL; | |
458 | } | |
459 | ||
18aadd47 BJ |
460 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
461 | { | |
462 | struct super_block *sb = journal->j_private; | |
463 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
464 | int error = is_journal_aborted(journal); | |
465 | struct ext4_journal_cb_entry *jce, *tmp; | |
466 | ||
467 | spin_lock(&sbi->s_md_lock); | |
468 | list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { | |
469 | list_del_init(&jce->jce_list); | |
470 | spin_unlock(&sbi->s_md_lock); | |
471 | jce->jce_func(sb, jce, error); | |
472 | spin_lock(&sbi->s_md_lock); | |
473 | } | |
474 | spin_unlock(&sbi->s_md_lock); | |
475 | } | |
1c13d5c0 | 476 | |
ac27a0ec DK |
477 | /* Deal with the reporting of failure conditions on a filesystem such as |
478 | * inconsistencies detected or read IO failures. | |
479 | * | |
480 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 481 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
482 | * write ordering constraints on the superblock which prevent us from |
483 | * writing it out straight away; and given that the journal is about to | |
484 | * be aborted, we can't rely on the current, or future, transactions to | |
485 | * write out the superblock safely. | |
486 | * | |
dab291af | 487 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 488 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
489 | * that error until we've noted it down and cleared it. |
490 | */ | |
491 | ||
617ba13b | 492 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 493 | { |
ac27a0ec DK |
494 | if (sb->s_flags & MS_RDONLY) |
495 | return; | |
496 | ||
2b2d6d01 | 497 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 498 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 499 | |
4ab2f15b | 500 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 501 | if (journal) |
dab291af | 502 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 503 | } |
2b2d6d01 | 504 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 505 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
506 | sb->s_flags |= MS_RDONLY; |
507 | } | |
ac27a0ec | 508 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 509 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
510 | sb->s_id); |
511 | } | |
512 | ||
12062ddd | 513 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 514 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 515 | { |
0ff2ea7d | 516 | struct va_format vaf; |
ac27a0ec DK |
517 | va_list args; |
518 | ||
519 | va_start(args, fmt); | |
0ff2ea7d JP |
520 | vaf.fmt = fmt; |
521 | vaf.va = &args; | |
522 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
523 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec | 524 | va_end(args); |
f3fc0210 | 525 | save_error_info(sb, function, line); |
ac27a0ec | 526 | |
617ba13b | 527 | ext4_handle_error(sb); |
ac27a0ec DK |
528 | } |
529 | ||
c398eda0 TT |
530 | void ext4_error_inode(struct inode *inode, const char *function, |
531 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
532 | const char *fmt, ...) |
533 | { | |
534 | va_list args; | |
f7c21177 | 535 | struct va_format vaf; |
1c13d5c0 | 536 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 537 | |
1c13d5c0 TT |
538 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
539 | es->s_last_error_block = cpu_to_le64(block); | |
540 | save_error_info(inode->i_sb, function, line); | |
273df556 | 541 | va_start(args, fmt); |
f7c21177 TT |
542 | vaf.fmt = fmt; |
543 | vaf.va = &args; | |
c398eda0 | 544 | if (block) |
d9ee81da JP |
545 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
546 | "inode #%lu: block %llu: comm %s: %pV\n", | |
547 | inode->i_sb->s_id, function, line, inode->i_ino, | |
548 | block, current->comm, &vaf); | |
549 | else | |
550 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
551 | "inode #%lu: comm %s: %pV\n", | |
552 | inode->i_sb->s_id, function, line, inode->i_ino, | |
553 | current->comm, &vaf); | |
273df556 FM |
554 | va_end(args); |
555 | ||
556 | ext4_handle_error(inode->i_sb); | |
557 | } | |
558 | ||
c398eda0 | 559 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
560 | unsigned int line, ext4_fsblk_t block, |
561 | const char *fmt, ...) | |
273df556 FM |
562 | { |
563 | va_list args; | |
f7c21177 | 564 | struct va_format vaf; |
1c13d5c0 | 565 | struct ext4_super_block *es; |
273df556 FM |
566 | struct inode *inode = file->f_dentry->d_inode; |
567 | char pathname[80], *path; | |
568 | ||
1c13d5c0 TT |
569 | es = EXT4_SB(inode->i_sb)->s_es; |
570 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
571 | save_error_info(inode->i_sb, function, line); | |
273df556 | 572 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 573 | if (IS_ERR(path)) |
273df556 | 574 | path = "(unknown)"; |
f7c21177 TT |
575 | va_start(args, fmt); |
576 | vaf.fmt = fmt; | |
577 | vaf.va = &args; | |
d9ee81da JP |
578 | if (block) |
579 | printk(KERN_CRIT | |
580 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
581 | "block %llu: comm %s: path %s: %pV\n", | |
582 | inode->i_sb->s_id, function, line, inode->i_ino, | |
583 | block, current->comm, path, &vaf); | |
584 | else | |
585 | printk(KERN_CRIT | |
586 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
587 | "comm %s: path %s: %pV\n", | |
588 | inode->i_sb->s_id, function, line, inode->i_ino, | |
589 | current->comm, path, &vaf); | |
273df556 FM |
590 | va_end(args); |
591 | ||
592 | ext4_handle_error(inode->i_sb); | |
593 | } | |
594 | ||
2b2d6d01 | 595 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
596 | char nbuf[16]) |
597 | { | |
598 | char *errstr = NULL; | |
599 | ||
600 | switch (errno) { | |
601 | case -EIO: | |
602 | errstr = "IO failure"; | |
603 | break; | |
604 | case -ENOMEM: | |
605 | errstr = "Out of memory"; | |
606 | break; | |
607 | case -EROFS: | |
78f1ddbb TT |
608 | if (!sb || (EXT4_SB(sb)->s_journal && |
609 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
610 | errstr = "Journal has aborted"; |
611 | else | |
612 | errstr = "Readonly filesystem"; | |
613 | break; | |
614 | default: | |
615 | /* If the caller passed in an extra buffer for unknown | |
616 | * errors, textualise them now. Else we just return | |
617 | * NULL. */ | |
618 | if (nbuf) { | |
619 | /* Check for truncated error codes... */ | |
620 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
621 | errstr = nbuf; | |
622 | } | |
623 | break; | |
624 | } | |
625 | ||
626 | return errstr; | |
627 | } | |
628 | ||
617ba13b | 629 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
630 | * automatically and invokes the appropriate error response. */ |
631 | ||
c398eda0 TT |
632 | void __ext4_std_error(struct super_block *sb, const char *function, |
633 | unsigned int line, int errno) | |
ac27a0ec DK |
634 | { |
635 | char nbuf[16]; | |
636 | const char *errstr; | |
637 | ||
638 | /* Special case: if the error is EROFS, and we're not already | |
639 | * inside a transaction, then there's really no point in logging | |
640 | * an error. */ | |
641 | if (errno == -EROFS && journal_current_handle() == NULL && | |
642 | (sb->s_flags & MS_RDONLY)) | |
643 | return; | |
644 | ||
617ba13b | 645 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
646 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
647 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 648 | save_error_info(sb, function, line); |
ac27a0ec | 649 | |
617ba13b | 650 | ext4_handle_error(sb); |
ac27a0ec DK |
651 | } |
652 | ||
653 | /* | |
617ba13b | 654 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
655 | * abort function may be used to deal with unrecoverable failures such |
656 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
657 | * | |
658 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
659 | * unless the error response on the fs has been set to panic in which | |
660 | * case we take the easy way out and panic immediately. | |
661 | */ | |
662 | ||
c67d859e | 663 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 664 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
665 | { |
666 | va_list args; | |
667 | ||
1c13d5c0 | 668 | save_error_info(sb, function, line); |
ac27a0ec | 669 | va_start(args, fmt); |
c398eda0 TT |
670 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
671 | function, line); | |
ac27a0ec DK |
672 | vprintk(fmt, args); |
673 | printk("\n"); | |
674 | va_end(args); | |
675 | ||
1c13d5c0 TT |
676 | if ((sb->s_flags & MS_RDONLY) == 0) { |
677 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
678 | sb->s_flags |= MS_RDONLY; | |
679 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
680 | if (EXT4_SB(sb)->s_journal) | |
681 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
682 | save_error_info(sb, function, line); | |
683 | } | |
ac27a0ec | 684 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 685 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
686 | } |
687 | ||
0ff2ea7d | 688 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 689 | { |
0ff2ea7d | 690 | struct va_format vaf; |
b31e1552 ES |
691 | va_list args; |
692 | ||
693 | va_start(args, fmt); | |
0ff2ea7d JP |
694 | vaf.fmt = fmt; |
695 | vaf.va = &args; | |
696 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
697 | va_end(args); |
698 | } | |
699 | ||
12062ddd | 700 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 701 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 702 | { |
0ff2ea7d | 703 | struct va_format vaf; |
ac27a0ec DK |
704 | va_list args; |
705 | ||
706 | va_start(args, fmt); | |
0ff2ea7d JP |
707 | vaf.fmt = fmt; |
708 | vaf.va = &args; | |
709 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
710 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
711 | va_end(args); |
712 | } | |
713 | ||
e29136f8 TT |
714 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
715 | struct super_block *sb, ext4_group_t grp, | |
716 | unsigned long ino, ext4_fsblk_t block, | |
717 | const char *fmt, ...) | |
5d1b1b3f AK |
718 | __releases(bitlock) |
719 | __acquires(bitlock) | |
720 | { | |
0ff2ea7d | 721 | struct va_format vaf; |
5d1b1b3f AK |
722 | va_list args; |
723 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
724 | ||
1c13d5c0 TT |
725 | es->s_last_error_ino = cpu_to_le32(ino); |
726 | es->s_last_error_block = cpu_to_le64(block); | |
727 | __save_error_info(sb, function, line); | |
0ff2ea7d | 728 | |
5d1b1b3f | 729 | va_start(args, fmt); |
0ff2ea7d JP |
730 | |
731 | vaf.fmt = fmt; | |
732 | vaf.va = &args; | |
21149d61 | 733 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
734 | sb->s_id, function, line, grp); |
735 | if (ino) | |
0ff2ea7d | 736 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 737 | if (block) |
0ff2ea7d JP |
738 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
739 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
740 | va_end(args); |
741 | ||
742 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 743 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
744 | return; |
745 | } | |
1c13d5c0 | 746 | |
5d1b1b3f AK |
747 | ext4_unlock_group(sb, grp); |
748 | ext4_handle_error(sb); | |
749 | /* | |
750 | * We only get here in the ERRORS_RO case; relocking the group | |
751 | * may be dangerous, but nothing bad will happen since the | |
752 | * filesystem will have already been marked read/only and the | |
753 | * journal has been aborted. We return 1 as a hint to callers | |
754 | * who might what to use the return value from | |
25985edc | 755 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
756 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
757 | * aggressively from the ext4 function in question, with a | |
758 | * more appropriate error code. | |
759 | */ | |
760 | ext4_lock_group(sb, grp); | |
761 | return; | |
762 | } | |
763 | ||
617ba13b | 764 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 765 | { |
617ba13b | 766 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 767 | |
617ba13b | 768 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
769 | return; |
770 | ||
12062ddd | 771 | ext4_warning(sb, |
ac27a0ec DK |
772 | "updating to rev %d because of new feature flag, " |
773 | "running e2fsck is recommended", | |
617ba13b | 774 | EXT4_DYNAMIC_REV); |
ac27a0ec | 775 | |
617ba13b MC |
776 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
777 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
778 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
779 | /* leave es->s_feature_*compat flags alone */ |
780 | /* es->s_uuid will be set by e2fsck if empty */ | |
781 | ||
782 | /* | |
783 | * The rest of the superblock fields should be zero, and if not it | |
784 | * means they are likely already in use, so leave them alone. We | |
785 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
786 | */ | |
787 | } | |
788 | ||
789 | /* | |
790 | * Open the external journal device | |
791 | */ | |
b31e1552 | 792 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
793 | { |
794 | struct block_device *bdev; | |
795 | char b[BDEVNAME_SIZE]; | |
796 | ||
d4d77629 | 797 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
798 | if (IS_ERR(bdev)) |
799 | goto fail; | |
800 | return bdev; | |
801 | ||
802 | fail: | |
b31e1552 | 803 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
804 | __bdevname(dev, b), PTR_ERR(bdev)); |
805 | return NULL; | |
806 | } | |
807 | ||
808 | /* | |
809 | * Release the journal device | |
810 | */ | |
617ba13b | 811 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 812 | { |
e525fd89 | 813 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
814 | } |
815 | ||
617ba13b | 816 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
817 | { |
818 | struct block_device *bdev; | |
819 | int ret = -ENODEV; | |
820 | ||
821 | bdev = sbi->journal_bdev; | |
822 | if (bdev) { | |
617ba13b | 823 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
824 | sbi->journal_bdev = NULL; |
825 | } | |
826 | return ret; | |
827 | } | |
828 | ||
829 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
830 | { | |
617ba13b | 831 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
832 | } |
833 | ||
617ba13b | 834 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
835 | { |
836 | struct list_head *l; | |
837 | ||
b31e1552 ES |
838 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
839 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
840 | |
841 | printk(KERN_ERR "sb_info orphan list:\n"); | |
842 | list_for_each(l, &sbi->s_orphan) { | |
843 | struct inode *inode = orphan_list_entry(l); | |
844 | printk(KERN_ERR " " | |
845 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
846 | inode->i_sb->s_id, inode->i_ino, inode, | |
847 | inode->i_mode, inode->i_nlink, | |
848 | NEXT_ORPHAN(inode)); | |
849 | } | |
850 | } | |
851 | ||
2b2d6d01 | 852 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 853 | { |
617ba13b MC |
854 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
855 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 856 | int i, err; |
ac27a0ec | 857 | |
857ac889 | 858 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
859 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
860 | ||
4c0425ff MC |
861 | flush_workqueue(sbi->dio_unwritten_wq); |
862 | destroy_workqueue(sbi->dio_unwritten_wq); | |
863 | ||
0390131b FM |
864 | if (sbi->s_journal) { |
865 | err = jbd2_journal_destroy(sbi->s_journal); | |
866 | sbi->s_journal = NULL; | |
867 | if (err < 0) | |
c67d859e | 868 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 869 | } |
d4edac31 | 870 | |
a1c6c569 | 871 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
872 | ext4_release_system_zone(sb); |
873 | ext4_mb_release(sb); | |
874 | ext4_ext_release(sb); | |
875 | ext4_xattr_put_super(sb); | |
876 | ||
ac27a0ec | 877 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 878 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 879 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 880 | } |
58c5873a | 881 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
882 | ext4_commit_super(sb, 1); |
883 | ||
240799cd | 884 | if (sbi->s_proc) { |
66acdcf4 | 885 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 886 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 887 | } |
3197ebdb | 888 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
889 | |
890 | for (i = 0; i < sbi->s_gdb_count; i++) | |
891 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 892 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 893 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 894 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
895 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
896 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 897 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
898 | brelse(sbi->s_sbh); |
899 | #ifdef CONFIG_QUOTA | |
900 | for (i = 0; i < MAXQUOTAS; i++) | |
901 | kfree(sbi->s_qf_names[i]); | |
902 | #endif | |
903 | ||
904 | /* Debugging code just in case the in-memory inode orphan list | |
905 | * isn't empty. The on-disk one can be non-empty if we've | |
906 | * detected an error and taken the fs readonly, but the | |
907 | * in-memory list had better be clean by this point. */ | |
908 | if (!list_empty(&sbi->s_orphan)) | |
909 | dump_orphan_list(sb, sbi); | |
910 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
911 | ||
f98393a6 | 912 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
913 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
914 | /* | |
915 | * Invalidate the journal device's buffers. We don't want them | |
916 | * floating about in memory - the physical journal device may | |
917 | * hotswapped, and it breaks the `ro-after' testing code. | |
918 | */ | |
919 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 920 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 921 | ext4_blkdev_remove(sbi); |
ac27a0ec | 922 | } |
c5e06d10 JL |
923 | if (sbi->s_mmp_tsk) |
924 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 925 | sb->s_fs_info = NULL; |
3197ebdb TT |
926 | /* |
927 | * Now that we are completely done shutting down the | |
928 | * superblock, we need to actually destroy the kobject. | |
929 | */ | |
3197ebdb TT |
930 | kobject_put(&sbi->s_kobj); |
931 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
932 | if (sbi->s_chksum_driver) |
933 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 934 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 935 | kfree(sbi); |
ac27a0ec DK |
936 | } |
937 | ||
e18b890b | 938 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
939 | |
940 | /* | |
941 | * Called inside transaction, so use GFP_NOFS | |
942 | */ | |
617ba13b | 943 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 944 | { |
617ba13b | 945 | struct ext4_inode_info *ei; |
ac27a0ec | 946 | |
e6b4f8da | 947 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
948 | if (!ei) |
949 | return NULL; | |
0b8e58a1 | 950 | |
ac27a0ec | 951 | ei->vfs_inode.i_version = 1; |
91246c00 | 952 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 953 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
954 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
955 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
956 | ei->i_reserved_data_blocks = 0; |
957 | ei->i_reserved_meta_blocks = 0; | |
958 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 959 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 960 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 961 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
962 | #ifdef CONFIG_QUOTA |
963 | ei->i_reserved_quota = 0; | |
964 | #endif | |
8aefcd55 | 965 | ei->jinode = NULL; |
c7064ef1 | 966 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 967 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 968 | ei->cur_aio_dio = NULL; |
b436b9be JK |
969 | ei->i_sync_tid = 0; |
970 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 971 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 972 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 973 | |
ac27a0ec DK |
974 | return &ei->vfs_inode; |
975 | } | |
976 | ||
7ff9c073 TT |
977 | static int ext4_drop_inode(struct inode *inode) |
978 | { | |
979 | int drop = generic_drop_inode(inode); | |
980 | ||
981 | trace_ext4_drop_inode(inode, drop); | |
982 | return drop; | |
983 | } | |
984 | ||
fa0d7e3d NP |
985 | static void ext4_i_callback(struct rcu_head *head) |
986 | { | |
987 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
988 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
989 | } | |
990 | ||
617ba13b | 991 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 992 | { |
9f7dd93d | 993 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
994 | ext4_msg(inode->i_sb, KERN_ERR, |
995 | "Inode %lu (%p): orphan list check failed!", | |
996 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
997 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
998 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
999 | true); | |
1000 | dump_stack(); | |
1001 | } | |
fa0d7e3d | 1002 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
1003 | } |
1004 | ||
51cc5068 | 1005 | static void init_once(void *foo) |
ac27a0ec | 1006 | { |
617ba13b | 1007 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 1008 | |
a35afb83 | 1009 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 1010 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 1011 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 1012 | #endif |
0e855ac8 | 1013 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 1014 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
1015 | } |
1016 | ||
1017 | static int init_inodecache(void) | |
1018 | { | |
617ba13b MC |
1019 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
1020 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
1021 | 0, (SLAB_RECLAIM_ACCOUNT| |
1022 | SLAB_MEM_SPREAD), | |
20c2df83 | 1023 | init_once); |
617ba13b | 1024 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1025 | return -ENOMEM; |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static void destroy_inodecache(void) | |
1030 | { | |
617ba13b | 1031 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1032 | } |
1033 | ||
0930fcc1 | 1034 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1035 | { |
0930fcc1 | 1036 | invalidate_inode_buffers(inode); |
dbd5768f | 1037 | clear_inode(inode); |
9f754758 | 1038 | dquot_drop(inode); |
c2ea3fde | 1039 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
1040 | if (EXT4_I(inode)->jinode) { |
1041 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1042 | EXT4_I(inode)->jinode); | |
1043 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1044 | EXT4_I(inode)->jinode = NULL; | |
1045 | } | |
ac27a0ec DK |
1046 | } |
1047 | ||
1b961ac0 | 1048 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1049 | u64 ino, u32 generation) |
ac27a0ec | 1050 | { |
ac27a0ec | 1051 | struct inode *inode; |
ac27a0ec | 1052 | |
617ba13b | 1053 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1054 | return ERR_PTR(-ESTALE); |
617ba13b | 1055 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1056 | return ERR_PTR(-ESTALE); |
1057 | ||
1058 | /* iget isn't really right if the inode is currently unallocated!! | |
1059 | * | |
617ba13b | 1060 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1061 | * deleted, so we should be safe. |
1062 | * | |
1063 | * Currently we don't know the generation for parent directory, so | |
1064 | * a generation of 0 means "accept any" | |
1065 | */ | |
1d1fe1ee DH |
1066 | inode = ext4_iget(sb, ino); |
1067 | if (IS_ERR(inode)) | |
1068 | return ERR_CAST(inode); | |
1069 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1070 | iput(inode); |
1071 | return ERR_PTR(-ESTALE); | |
1072 | } | |
1b961ac0 CH |
1073 | |
1074 | return inode; | |
1075 | } | |
1076 | ||
1077 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1078 | int fh_len, int fh_type) |
1b961ac0 CH |
1079 | { |
1080 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1081 | ext4_nfs_get_inode); | |
1082 | } | |
1083 | ||
1084 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1085 | int fh_len, int fh_type) |
1b961ac0 CH |
1086 | { |
1087 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1088 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1089 | } |
1090 | ||
c39a7f84 TO |
1091 | /* |
1092 | * Try to release metadata pages (indirect blocks, directories) which are | |
1093 | * mapped via the block device. Since these pages could have journal heads | |
1094 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1095 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1096 | */ | |
0b8e58a1 AD |
1097 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1098 | gfp_t wait) | |
c39a7f84 TO |
1099 | { |
1100 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1101 | ||
1102 | WARN_ON(PageChecked(page)); | |
1103 | if (!page_has_buffers(page)) | |
1104 | return 0; | |
1105 | if (journal) | |
1106 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1107 | wait & ~__GFP_WAIT); | |
1108 | return try_to_free_buffers(page); | |
1109 | } | |
1110 | ||
ac27a0ec | 1111 | #ifdef CONFIG_QUOTA |
af5bc92d | 1112 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1113 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1114 | |
617ba13b MC |
1115 | static int ext4_write_dquot(struct dquot *dquot); |
1116 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1117 | static int ext4_release_dquot(struct dquot *dquot); | |
1118 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1119 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1120 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1121 | struct path *path); |
7c319d32 AK |
1122 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, |
1123 | int format_id); | |
ca0e05e4 | 1124 | static int ext4_quota_off(struct super_block *sb, int type); |
7c319d32 | 1125 | static int ext4_quota_off_sysfile(struct super_block *sb, int type); |
617ba13b MC |
1126 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1127 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1128 | size_t len, loff_t off); |
617ba13b | 1129 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1130 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1131 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1132 | unsigned int flags); | |
1133 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1134 | |
61e225dc | 1135 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1136 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1137 | .write_dquot = ext4_write_dquot, |
1138 | .acquire_dquot = ext4_acquire_dquot, | |
1139 | .release_dquot = ext4_release_dquot, | |
1140 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1141 | .write_info = ext4_write_info, |
1142 | .alloc_dquot = dquot_alloc, | |
1143 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1144 | }; |
1145 | ||
0d54b217 | 1146 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1147 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1148 | .quota_off = ext4_quota_off, |
287a8095 CH |
1149 | .quota_sync = dquot_quota_sync, |
1150 | .get_info = dquot_get_dqinfo, | |
1151 | .set_info = dquot_set_dqinfo, | |
1152 | .get_dqblk = dquot_get_dqblk, | |
1153 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec | 1154 | }; |
7c319d32 AK |
1155 | |
1156 | static const struct quotactl_ops ext4_qctl_sysfile_operations = { | |
1157 | .quota_on_meta = ext4_quota_on_sysfile, | |
1158 | .quota_off = ext4_quota_off_sysfile, | |
1159 | .quota_sync = dquot_quota_sync, | |
1160 | .get_info = dquot_get_dqinfo, | |
1161 | .set_info = dquot_set_dqinfo, | |
1162 | .get_dqblk = dquot_get_dqblk, | |
1163 | .set_dqblk = dquot_set_dqblk | |
1164 | }; | |
ac27a0ec DK |
1165 | #endif |
1166 | ||
ee9b6d61 | 1167 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1168 | .alloc_inode = ext4_alloc_inode, |
1169 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1170 | .write_inode = ext4_write_inode, |
1171 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1172 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1173 | .evict_inode = ext4_evict_inode, |
617ba13b | 1174 | .put_super = ext4_put_super, |
617ba13b | 1175 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1176 | .freeze_fs = ext4_freeze, |
1177 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1178 | .statfs = ext4_statfs, |
1179 | .remount_fs = ext4_remount, | |
617ba13b | 1180 | .show_options = ext4_show_options, |
ac27a0ec | 1181 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1182 | .quota_read = ext4_quota_read, |
1183 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1184 | #endif |
c39a7f84 | 1185 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1186 | }; |
1187 | ||
9ca92389 TT |
1188 | static const struct super_operations ext4_nojournal_sops = { |
1189 | .alloc_inode = ext4_alloc_inode, | |
1190 | .destroy_inode = ext4_destroy_inode, | |
1191 | .write_inode = ext4_write_inode, | |
1192 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1193 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1194 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1195 | .put_super = ext4_put_super, |
1196 | .statfs = ext4_statfs, | |
1197 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1198 | .show_options = ext4_show_options, |
1199 | #ifdef CONFIG_QUOTA | |
1200 | .quota_read = ext4_quota_read, | |
1201 | .quota_write = ext4_quota_write, | |
1202 | #endif | |
1203 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1204 | }; | |
1205 | ||
39655164 | 1206 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1207 | .fh_to_dentry = ext4_fh_to_dentry, |
1208 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1209 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1210 | }; |
1211 | ||
1212 | enum { | |
1213 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1214 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1215 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1216 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1217 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
30773840 | 1218 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
43e625d8 | 1219 | Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1220 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1221 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1222 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1223 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1224 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
661aa520 | 1225 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
1449032b TT |
1226 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1227 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1228 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1229 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1230 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
df981d03 | 1231 | Opt_max_dir_size_kb, |
ac27a0ec DK |
1232 | }; |
1233 | ||
a447c093 | 1234 | static const match_table_t tokens = { |
ac27a0ec DK |
1235 | {Opt_bsd_df, "bsddf"}, |
1236 | {Opt_minix_df, "minixdf"}, | |
1237 | {Opt_grpid, "grpid"}, | |
1238 | {Opt_grpid, "bsdgroups"}, | |
1239 | {Opt_nogrpid, "nogrpid"}, | |
1240 | {Opt_nogrpid, "sysvgroups"}, | |
1241 | {Opt_resgid, "resgid=%u"}, | |
1242 | {Opt_resuid, "resuid=%u"}, | |
1243 | {Opt_sb, "sb=%u"}, | |
1244 | {Opt_err_cont, "errors=continue"}, | |
1245 | {Opt_err_panic, "errors=panic"}, | |
1246 | {Opt_err_ro, "errors=remount-ro"}, | |
1247 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1248 | {Opt_debug, "debug"}, |
72578c33 TT |
1249 | {Opt_removed, "oldalloc"}, |
1250 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1251 | {Opt_user_xattr, "user_xattr"}, |
1252 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1253 | {Opt_acl, "acl"}, | |
1254 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1255 | {Opt_noload, "norecovery"}, |
5a916be1 | 1256 | {Opt_noload, "noload"}, |
72578c33 TT |
1257 | {Opt_removed, "nobh"}, |
1258 | {Opt_removed, "bh"}, | |
ac27a0ec | 1259 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1260 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1261 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1262 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1263 | {Opt_journal_checksum, "journal_checksum"}, |
1264 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1265 | {Opt_abort, "abort"}, |
1266 | {Opt_data_journal, "data=journal"}, | |
1267 | {Opt_data_ordered, "data=ordered"}, | |
1268 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1269 | {Opt_data_err_abort, "data_err=abort"}, |
1270 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1271 | {Opt_offusrjquota, "usrjquota="}, |
1272 | {Opt_usrjquota, "usrjquota=%s"}, | |
1273 | {Opt_offgrpjquota, "grpjquota="}, | |
1274 | {Opt_grpjquota, "grpjquota=%s"}, | |
1275 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1276 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1277 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1278 | {Opt_grpquota, "grpquota"}, |
1279 | {Opt_noquota, "noquota"}, | |
1280 | {Opt_quota, "quota"}, | |
1281 | {Opt_usrquota, "usrquota"}, | |
1282 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1283 | {Opt_barrier, "barrier"}, |
1284 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1285 | {Opt_i_version, "i_version"}, |
c9de560d | 1286 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1287 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1288 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1289 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1290 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1291 | {Opt_block_validity, "block_validity"}, |
1292 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1293 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1294 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1295 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1296 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1297 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1298 | {Opt_dioread_nolock, "dioread_nolock"}, |
1299 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1300 | {Opt_discard, "discard"}, |
1301 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1302 | {Opt_init_itable, "init_itable=%u"}, |
1303 | {Opt_init_itable, "init_itable"}, | |
1304 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1305 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
c7198b9c TT |
1306 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1307 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1308 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1309 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1310 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1311 | {Opt_err, NULL}, |
ac27a0ec DK |
1312 | }; |
1313 | ||
617ba13b | 1314 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1315 | { |
617ba13b | 1316 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1317 | char *options = (char *) *data; |
1318 | ||
1319 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1320 | return 1; /* Default location */ | |
0b8e58a1 | 1321 | |
ac27a0ec | 1322 | options += 3; |
0b8e58a1 | 1323 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1324 | sb_block = simple_strtoul(options, &options, 0); |
1325 | if (*options && *options != ',') { | |
4776004f | 1326 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1327 | (char *) *data); |
1328 | return 1; | |
1329 | } | |
1330 | if (*options == ',') | |
1331 | options++; | |
1332 | *data = (void *) options; | |
0b8e58a1 | 1333 | |
ac27a0ec DK |
1334 | return sb_block; |
1335 | } | |
1336 | ||
b3881f74 | 1337 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1338 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1339 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1340 | |
56c50f11 DM |
1341 | #ifdef CONFIG_QUOTA |
1342 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1343 | { | |
1344 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1345 | char *qname; | |
1346 | ||
1347 | if (sb_any_quota_loaded(sb) && | |
1348 | !sbi->s_qf_names[qtype]) { | |
1349 | ext4_msg(sb, KERN_ERR, | |
1350 | "Cannot change journaled " | |
1351 | "quota options when quota turned on"); | |
57f73c2c | 1352 | return -1; |
56c50f11 DM |
1353 | } |
1354 | qname = match_strdup(args); | |
1355 | if (!qname) { | |
1356 | ext4_msg(sb, KERN_ERR, | |
1357 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1358 | return -1; |
56c50f11 DM |
1359 | } |
1360 | if (sbi->s_qf_names[qtype] && | |
1361 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1362 | ext4_msg(sb, KERN_ERR, | |
1363 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1364 | kfree(qname); | |
57f73c2c | 1365 | return -1; |
56c50f11 DM |
1366 | } |
1367 | sbi->s_qf_names[qtype] = qname; | |
1368 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1369 | ext4_msg(sb, KERN_ERR, | |
1370 | "quotafile must be on filesystem root"); | |
1371 | kfree(sbi->s_qf_names[qtype]); | |
1372 | sbi->s_qf_names[qtype] = NULL; | |
57f73c2c | 1373 | return -1; |
56c50f11 | 1374 | } |
fd8c37ec | 1375 | set_opt(sb, QUOTA); |
56c50f11 DM |
1376 | return 1; |
1377 | } | |
1378 | ||
1379 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1380 | { | |
1381 | ||
1382 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1383 | ||
1384 | if (sb_any_quota_loaded(sb) && | |
1385 | sbi->s_qf_names[qtype]) { | |
1386 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1387 | " when quota turned on"); | |
57f73c2c | 1388 | return -1; |
56c50f11 DM |
1389 | } |
1390 | /* | |
1391 | * The space will be released later when all options are confirmed | |
1392 | * to be correct | |
1393 | */ | |
1394 | sbi->s_qf_names[qtype] = NULL; | |
1395 | return 1; | |
1396 | } | |
1397 | #endif | |
1398 | ||
26092bf5 TT |
1399 | #define MOPT_SET 0x0001 |
1400 | #define MOPT_CLEAR 0x0002 | |
1401 | #define MOPT_NOSUPPORT 0x0004 | |
1402 | #define MOPT_EXPLICIT 0x0008 | |
1403 | #define MOPT_CLEAR_ERR 0x0010 | |
1404 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1405 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1406 | #define MOPT_Q 0 |
1407 | #define MOPT_QFMT 0x0040 | |
1408 | #else | |
1409 | #define MOPT_Q MOPT_NOSUPPORT | |
1410 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1411 | #endif |
26092bf5 TT |
1412 | #define MOPT_DATAJ 0x0080 |
1413 | ||
1414 | static const struct mount_opts { | |
1415 | int token; | |
1416 | int mount_opt; | |
1417 | int flags; | |
1418 | } ext4_mount_opts[] = { | |
1419 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1420 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1421 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1422 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
1423 | {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, | |
1424 | {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, | |
1425 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, | |
1426 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
1427 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, | |
1428 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, | |
1429 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, | |
1430 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
1431 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, | |
1432 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, | |
1433 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, | |
1434 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | | |
1435 | EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, | |
1436 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, | |
1437 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, | |
1438 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1439 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
1440 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, | |
1441 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, | |
1442 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, | |
1443 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1444 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1445 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1446 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1447 | {Opt_commit, 0, MOPT_GTE0}, | |
1448 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1449 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1450 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1451 | {Opt_init_itable, 0, MOPT_GTE0}, | |
1452 | {Opt_stripe, 0, MOPT_GTE0}, | |
1453 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, | |
1454 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, | |
1455 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, | |
03010a33 | 1456 | #ifdef CONFIG_EXT4_FS_XATTR |
26092bf5 TT |
1457 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1458 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
ac27a0ec | 1459 | #else |
26092bf5 TT |
1460 | {Opt_user_xattr, 0, MOPT_NOSUPPORT}, |
1461 | {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1462 | #endif |
03010a33 | 1463 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1464 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1465 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1466 | #else |
26092bf5 TT |
1467 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1468 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1469 | #endif |
26092bf5 TT |
1470 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1471 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1472 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1473 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1474 | MOPT_SET | MOPT_Q}, | |
1475 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1476 | MOPT_SET | MOPT_Q}, | |
1477 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1478 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1479 | {Opt_usrjquota, 0, MOPT_Q}, | |
1480 | {Opt_grpjquota, 0, MOPT_Q}, | |
1481 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1482 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1483 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1484 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1485 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1486 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
26092bf5 TT |
1487 | {Opt_err, 0, 0} |
1488 | }; | |
1489 | ||
1490 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1491 | substring_t *args, unsigned long *journal_devnum, | |
1492 | unsigned int *journal_ioprio, int is_remount) | |
1493 | { | |
1494 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1495 | const struct mount_opts *m; | |
08cefc7a EB |
1496 | kuid_t uid; |
1497 | kgid_t gid; | |
26092bf5 TT |
1498 | int arg = 0; |
1499 | ||
57f73c2c TT |
1500 | #ifdef CONFIG_QUOTA |
1501 | if (token == Opt_usrjquota) | |
1502 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1503 | else if (token == Opt_grpjquota) | |
1504 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1505 | else if (token == Opt_offusrjquota) | |
1506 | return clear_qf_name(sb, USRQUOTA); | |
1507 | else if (token == Opt_offgrpjquota) | |
1508 | return clear_qf_name(sb, GRPQUOTA); | |
1509 | #endif | |
26092bf5 TT |
1510 | if (args->from && match_int(args, &arg)) |
1511 | return -1; | |
1512 | switch (token) { | |
f7048605 TT |
1513 | case Opt_noacl: |
1514 | case Opt_nouser_xattr: | |
1515 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1516 | break; | |
26092bf5 TT |
1517 | case Opt_sb: |
1518 | return 1; /* handled by get_sb_block() */ | |
1519 | case Opt_removed: | |
1520 | ext4_msg(sb, KERN_WARNING, | |
1521 | "Ignoring removed %s option", opt); | |
1522 | return 1; | |
1523 | case Opt_resuid: | |
08cefc7a EB |
1524 | uid = make_kuid(current_user_ns(), arg); |
1525 | if (!uid_valid(uid)) { | |
1526 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
1527 | return -1; | |
1528 | } | |
1529 | sbi->s_resuid = uid; | |
26092bf5 TT |
1530 | return 1; |
1531 | case Opt_resgid: | |
08cefc7a EB |
1532 | gid = make_kgid(current_user_ns(), arg); |
1533 | if (!gid_valid(gid)) { | |
1534 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1535 | return -1; | |
1536 | } | |
1537 | sbi->s_resgid = gid; | |
26092bf5 TT |
1538 | return 1; |
1539 | case Opt_abort: | |
1540 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1541 | return 1; | |
1542 | case Opt_i_version: | |
1543 | sb->s_flags |= MS_I_VERSION; | |
1544 | return 1; | |
1545 | case Opt_journal_dev: | |
1546 | if (is_remount) { | |
1547 | ext4_msg(sb, KERN_ERR, | |
1548 | "Cannot specify journal on remount"); | |
1549 | return -1; | |
1550 | } | |
1551 | *journal_devnum = arg; | |
1552 | return 1; | |
1553 | case Opt_journal_ioprio: | |
1554 | if (arg < 0 || arg > 7) | |
1555 | return -1; | |
1556 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
1557 | return 1; | |
1558 | } | |
1559 | ||
1560 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1561 | if (token != m->token) | |
1562 | continue; | |
1563 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1564 | return -1; | |
1565 | if (m->flags & MOPT_EXPLICIT) | |
1566 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1567 | if (m->flags & MOPT_CLEAR_ERR) | |
1568 | clear_opt(sb, ERRORS_MASK); | |
1569 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1570 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1571 | "options when quota turned on"); | |
1572 | return -1; | |
1573 | } | |
1574 | ||
1575 | if (m->flags & MOPT_NOSUPPORT) { | |
1576 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1577 | } else if (token == Opt_commit) { | |
1578 | if (arg == 0) | |
1579 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1580 | sbi->s_commit_interval = HZ * arg; | |
1581 | } else if (token == Opt_max_batch_time) { | |
1582 | if (arg == 0) | |
1583 | arg = EXT4_DEF_MAX_BATCH_TIME; | |
1584 | sbi->s_max_batch_time = arg; | |
1585 | } else if (token == Opt_min_batch_time) { | |
1586 | sbi->s_min_batch_time = arg; | |
1587 | } else if (token == Opt_inode_readahead_blks) { | |
1588 | if (arg > (1 << 30)) | |
1589 | return -1; | |
1590 | if (arg && !is_power_of_2(arg)) { | |
b31e1552 | 1591 | ext4_msg(sb, KERN_ERR, |
26092bf5 TT |
1592 | "EXT4-fs: inode_readahead_blks" |
1593 | " must be a power of 2"); | |
1594 | return -1; | |
ac27a0ec | 1595 | } |
26092bf5 TT |
1596 | sbi->s_inode_readahead_blks = arg; |
1597 | } else if (token == Opt_init_itable) { | |
1598 | set_opt(sb, INIT_INODE_TABLE); | |
1599 | if (!args->from) | |
1600 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1601 | sbi->s_li_wait_mult = arg; | |
df981d03 TT |
1602 | } else if (token == Opt_max_dir_size_kb) { |
1603 | sbi->s_max_dir_size_kb = arg; | |
26092bf5 TT |
1604 | } else if (token == Opt_stripe) { |
1605 | sbi->s_stripe = arg; | |
1606 | } else if (m->flags & MOPT_DATAJ) { | |
ac27a0ec | 1607 | if (is_remount) { |
eb513689 TT |
1608 | if (!sbi->s_journal) |
1609 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
26092bf5 TT |
1610 | else if (test_opt(sb, DATA_FLAGS) != |
1611 | m->mount_opt) { | |
b31e1552 | 1612 | ext4_msg(sb, KERN_ERR, |
26092bf5 TT |
1613 | "Cannot change data mode on remount"); |
1614 | return -1; | |
ac27a0ec DK |
1615 | } |
1616 | } else { | |
fd8c37ec | 1617 | clear_opt(sb, DATA_FLAGS); |
26092bf5 | 1618 | sbi->s_mount_opt |= m->mount_opt; |
ac27a0ec | 1619 | } |
ac27a0ec | 1620 | #ifdef CONFIG_QUOTA |
26092bf5 | 1621 | } else if (m->flags & MOPT_QFMT) { |
17bd13b3 | 1622 | if (sb_any_quota_loaded(sb) && |
26092bf5 TT |
1623 | sbi->s_jquota_fmt != m->mount_opt) { |
1624 | ext4_msg(sb, KERN_ERR, "Cannot " | |
1625 | "change journaled quota options " | |
1626 | "when quota turned on"); | |
1627 | return -1; | |
ac27a0ec | 1628 | } |
26092bf5 | 1629 | sbi->s_jquota_fmt = m->mount_opt; |
ac27a0ec | 1630 | #endif |
26092bf5 TT |
1631 | } else { |
1632 | if (!args->from) | |
1633 | arg = 1; | |
1634 | if (m->flags & MOPT_CLEAR) | |
1635 | arg = !arg; | |
1636 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1637 | ext4_msg(sb, KERN_WARNING, | |
1638 | "buggy handling of option %s", opt); | |
1639 | WARN_ON(1); | |
1640 | return -1; | |
3197ebdb | 1641 | } |
26092bf5 TT |
1642 | if (arg != 0) |
1643 | sbi->s_mount_opt |= m->mount_opt; | |
afd4672d | 1644 | else |
26092bf5 | 1645 | sbi->s_mount_opt &= ~m->mount_opt; |
ac27a0ec | 1646 | } |
26092bf5 TT |
1647 | return 1; |
1648 | } | |
1649 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1650 | "or missing value", opt); | |
1651 | return -1; | |
1652 | } | |
1653 | ||
1654 | static int parse_options(char *options, struct super_block *sb, | |
1655 | unsigned long *journal_devnum, | |
1656 | unsigned int *journal_ioprio, | |
1657 | int is_remount) | |
1658 | { | |
db7e5c66 | 1659 | #ifdef CONFIG_QUOTA |
26092bf5 | 1660 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
db7e5c66 | 1661 | #endif |
26092bf5 TT |
1662 | char *p; |
1663 | substring_t args[MAX_OPT_ARGS]; | |
1664 | int token; | |
1665 | ||
1666 | if (!options) | |
1667 | return 1; | |
1668 | ||
1669 | while ((p = strsep(&options, ",")) != NULL) { | |
1670 | if (!*p) | |
1671 | continue; | |
1672 | /* | |
1673 | * Initialize args struct so we know whether arg was | |
1674 | * found; some options take optional arguments. | |
1675 | */ | |
caecd0af | 1676 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1677 | token = match_token(p, tokens, args); |
1678 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1679 | journal_ioprio, is_remount) < 0) | |
1680 | return 0; | |
ac27a0ec DK |
1681 | } |
1682 | #ifdef CONFIG_QUOTA | |
1683 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1684 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1685 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1686 | |
482a7425 | 1687 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1688 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1689 | |
56c50f11 | 1690 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1691 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1692 | "format mixing"); | |
ac27a0ec DK |
1693 | return 0; |
1694 | } | |
1695 | ||
1696 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1697 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1698 | "not specified"); | |
ac27a0ec DK |
1699 | return 0; |
1700 | } | |
1701 | } else { | |
1702 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1703 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1704 | "specified with no journaling " |
b31e1552 | 1705 | "enabled"); |
ac27a0ec DK |
1706 | return 0; |
1707 | } | |
1708 | } | |
1709 | #endif | |
1710 | return 1; | |
1711 | } | |
1712 | ||
2adf6da8 TT |
1713 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1714 | struct super_block *sb) | |
1715 | { | |
1716 | #if defined(CONFIG_QUOTA) | |
1717 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1718 | ||
1719 | if (sbi->s_jquota_fmt) { | |
1720 | char *fmtname = ""; | |
1721 | ||
1722 | switch (sbi->s_jquota_fmt) { | |
1723 | case QFMT_VFS_OLD: | |
1724 | fmtname = "vfsold"; | |
1725 | break; | |
1726 | case QFMT_VFS_V0: | |
1727 | fmtname = "vfsv0"; | |
1728 | break; | |
1729 | case QFMT_VFS_V1: | |
1730 | fmtname = "vfsv1"; | |
1731 | break; | |
1732 | } | |
1733 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1734 | } | |
1735 | ||
1736 | if (sbi->s_qf_names[USRQUOTA]) | |
1737 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1738 | ||
1739 | if (sbi->s_qf_names[GRPQUOTA]) | |
1740 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1741 | ||
1742 | if (test_opt(sb, USRQUOTA)) | |
1743 | seq_puts(seq, ",usrquota"); | |
1744 | ||
1745 | if (test_opt(sb, GRPQUOTA)) | |
1746 | seq_puts(seq, ",grpquota"); | |
1747 | #endif | |
1748 | } | |
1749 | ||
5a916be1 TT |
1750 | static const char *token2str(int token) |
1751 | { | |
50df9fd5 | 1752 | const struct match_token *t; |
5a916be1 TT |
1753 | |
1754 | for (t = tokens; t->token != Opt_err; t++) | |
1755 | if (t->token == token && !strchr(t->pattern, '=')) | |
1756 | break; | |
1757 | return t->pattern; | |
1758 | } | |
1759 | ||
2adf6da8 TT |
1760 | /* |
1761 | * Show an option if | |
1762 | * - it's set to a non-default value OR | |
1763 | * - if the per-sb default is different from the global default | |
1764 | */ | |
66acdcf4 TT |
1765 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1766 | int nodefs) | |
2adf6da8 | 1767 | { |
2adf6da8 TT |
1768 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1769 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1770 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1771 | const struct mount_opts *m; |
66acdcf4 | 1772 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1773 | |
66acdcf4 TT |
1774 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1775 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1776 | |
1777 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1778 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1779 | ||
1780 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1781 | int want_set = m->flags & MOPT_SET; | |
1782 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1783 | (m->flags & MOPT_CLEAR_ERR)) | |
1784 | continue; | |
66acdcf4 | 1785 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1786 | continue; /* skip if same as the default */ |
1787 | if ((want_set && | |
1788 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1789 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1790 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1791 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1792 | } |
5a916be1 | 1793 | |
08cefc7a | 1794 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1795 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1796 | SEQ_OPTS_PRINT("resuid=%u", |
1797 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1798 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1799 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1800 | SEQ_OPTS_PRINT("resgid=%u", |
1801 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1802 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1803 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1804 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1805 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1806 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1807 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1808 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1809 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1810 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1811 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1812 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1813 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1814 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1815 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1816 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1817 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1818 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1819 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1820 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1821 | SEQ_OPTS_PUTS("data=journal"); | |
1822 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1823 | SEQ_OPTS_PUTS("data=ordered"); | |
1824 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1825 | SEQ_OPTS_PUTS("data=writeback"); | |
1826 | } | |
66acdcf4 TT |
1827 | if (nodefs || |
1828 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1829 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1830 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1831 | |
66acdcf4 TT |
1832 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1833 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1834 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1835 | if (nodefs || sbi->s_max_dir_size_kb) |
1836 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1837 | |
1838 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1839 | return 0; |
1840 | } | |
1841 | ||
66acdcf4 TT |
1842 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1843 | { | |
1844 | return _ext4_show_options(seq, root->d_sb, 0); | |
1845 | } | |
1846 | ||
1847 | static int options_seq_show(struct seq_file *seq, void *offset) | |
1848 | { | |
1849 | struct super_block *sb = seq->private; | |
1850 | int rc; | |
1851 | ||
1852 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1853 | rc = _ext4_show_options(seq, sb, 1); | |
1854 | seq_puts(seq, "\n"); | |
1855 | return rc; | |
1856 | } | |
1857 | ||
1858 | static int options_open_fs(struct inode *inode, struct file *file) | |
1859 | { | |
1860 | return single_open(file, options_seq_show, PDE(inode)->data); | |
1861 | } | |
1862 | ||
1863 | static const struct file_operations ext4_seq_options_fops = { | |
1864 | .owner = THIS_MODULE, | |
1865 | .open = options_open_fs, | |
1866 | .read = seq_read, | |
1867 | .llseek = seq_lseek, | |
1868 | .release = single_release, | |
1869 | }; | |
1870 | ||
617ba13b | 1871 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1872 | int read_only) |
1873 | { | |
617ba13b | 1874 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1875 | int res = 0; |
1876 | ||
617ba13b | 1877 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1878 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1879 | "forcing read-only mode"); | |
ac27a0ec DK |
1880 | res = MS_RDONLY; |
1881 | } | |
1882 | if (read_only) | |
281b5995 | 1883 | goto done; |
617ba13b | 1884 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1885 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1886 | "running e2fsck is recommended"); | |
617ba13b | 1887 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1888 | ext4_msg(sb, KERN_WARNING, |
1889 | "warning: mounting fs with errors, " | |
1890 | "running e2fsck is recommended"); | |
ed3ce80a | 1891 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1892 | le16_to_cpu(es->s_mnt_count) >= |
1893 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1894 | ext4_msg(sb, KERN_WARNING, |
1895 | "warning: maximal mount count reached, " | |
1896 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1897 | else if (le32_to_cpu(es->s_checkinterval) && |
1898 | (le32_to_cpu(es->s_lastcheck) + | |
1899 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1900 | ext4_msg(sb, KERN_WARNING, |
1901 | "warning: checktime reached, " | |
1902 | "running e2fsck is recommended"); | |
0b8e58a1 | 1903 | if (!sbi->s_journal) |
0390131b | 1904 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1905 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1906 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1907 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1908 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1909 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1910 | if (sbi->s_journal) |
1911 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1912 | |
e2d67052 | 1913 | ext4_commit_super(sb, 1); |
281b5995 | 1914 | done: |
ac27a0ec | 1915 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1916 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1917 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1918 | sb->s_blocksize, |
1919 | sbi->s_groups_count, | |
617ba13b MC |
1920 | EXT4_BLOCKS_PER_GROUP(sb), |
1921 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1922 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1923 | |
7abc52c2 | 1924 | cleancache_init_fs(sb); |
ac27a0ec DK |
1925 | return res; |
1926 | } | |
1927 | ||
117fff10 TT |
1928 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1929 | { | |
1930 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1931 | struct flex_groups *new_groups; | |
1932 | int size; | |
1933 | ||
1934 | if (!sbi->s_log_groups_per_flex) | |
1935 | return 0; | |
1936 | ||
1937 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
1938 | if (size <= sbi->s_flex_groups_allocated) | |
1939 | return 0; | |
1940 | ||
1941 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
1942 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
1943 | if (!new_groups) { | |
1944 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
1945 | size / (int) sizeof(struct flex_groups)); | |
1946 | return -ENOMEM; | |
1947 | } | |
1948 | ||
1949 | if (sbi->s_flex_groups) { | |
1950 | memcpy(new_groups, sbi->s_flex_groups, | |
1951 | (sbi->s_flex_groups_allocated * | |
1952 | sizeof(struct flex_groups))); | |
1953 | ext4_kvfree(sbi->s_flex_groups); | |
1954 | } | |
1955 | sbi->s_flex_groups = new_groups; | |
1956 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
1957 | return 0; | |
1958 | } | |
1959 | ||
772cb7c8 JS |
1960 | static int ext4_fill_flex_info(struct super_block *sb) |
1961 | { | |
1962 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1963 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 1964 | ext4_group_t flex_group; |
d50f2ab6 | 1965 | unsigned int groups_per_flex = 0; |
117fff10 | 1966 | int i, err; |
772cb7c8 | 1967 | |
503358ae | 1968 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 1969 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
1970 | sbi->s_log_groups_per_flex = 0; |
1971 | return 1; | |
1972 | } | |
d50f2ab6 | 1973 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; |
772cb7c8 | 1974 | |
117fff10 TT |
1975 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
1976 | if (err) | |
9933fc0a | 1977 | goto failed; |
772cb7c8 | 1978 | |
772cb7c8 | 1979 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1980 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1981 | |
1982 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1983 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1984 | &sbi->s_flex_groups[flex_group].free_inodes); | |
021b65bb | 1985 | atomic_add(ext4_free_group_clusters(sb, gdp), |
24aaa8ef | 1986 | &sbi->s_flex_groups[flex_group].free_clusters); |
7ad9bb65 TT |
1987 | atomic_add(ext4_used_dirs_count(sb, gdp), |
1988 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1989 | } |
1990 | ||
1991 | return 1; | |
1992 | failed: | |
1993 | return 0; | |
1994 | } | |
1995 | ||
feb0ab32 DW |
1996 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1997 | struct ext4_group_desc *gdp) | |
717d50e4 | 1998 | { |
feb0ab32 | 1999 | int offset; |
717d50e4 | 2000 | __u16 crc = 0; |
feb0ab32 | 2001 | __le32 le_group = cpu_to_le32(block_group); |
717d50e4 | 2002 | |
feb0ab32 DW |
2003 | if ((sbi->s_es->s_feature_ro_compat & |
2004 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { | |
2005 | /* Use new metadata_csum algorithm */ | |
2006 | __u16 old_csum; | |
2007 | __u32 csum32; | |
2008 | ||
2009 | old_csum = gdp->bg_checksum; | |
2010 | gdp->bg_checksum = 0; | |
2011 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2012 | sizeof(le_group)); | |
2013 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2014 | sbi->s_desc_size); | |
2015 | gdp->bg_checksum = old_csum; | |
2016 | ||
2017 | crc = csum32 & 0xFFFF; | |
2018 | goto out; | |
717d50e4 AD |
2019 | } |
2020 | ||
feb0ab32 DW |
2021 | /* old crc16 code */ |
2022 | offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2023 | ||
2024 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2025 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2026 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2027 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2028 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2029 | if ((sbi->s_es->s_feature_incompat & | |
2030 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2031 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2032 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2033 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2034 | offset); | |
2035 | ||
2036 | out: | |
717d50e4 AD |
2037 | return cpu_to_le16(crc); |
2038 | } | |
2039 | ||
feb0ab32 | 2040 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2041 | struct ext4_group_desc *gdp) |
2042 | { | |
feb0ab32 DW |
2043 | if (ext4_has_group_desc_csum(sb) && |
2044 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), | |
2045 | block_group, gdp))) | |
717d50e4 AD |
2046 | return 0; |
2047 | ||
2048 | return 1; | |
2049 | } | |
2050 | ||
feb0ab32 DW |
2051 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2052 | struct ext4_group_desc *gdp) | |
2053 | { | |
2054 | if (!ext4_has_group_desc_csum(sb)) | |
2055 | return; | |
2056 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); | |
2057 | } | |
2058 | ||
ac27a0ec | 2059 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2060 | static int ext4_check_descriptors(struct super_block *sb, |
2061 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2062 | { |
617ba13b MC |
2063 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2064 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2065 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2066 | ext4_fsblk_t block_bitmap; |
2067 | ext4_fsblk_t inode_bitmap; | |
2068 | ext4_fsblk_t inode_table; | |
ce421581 | 2069 | int flexbg_flag = 0; |
bfff6873 | 2070 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2071 | |
ce421581 JS |
2072 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2073 | flexbg_flag = 1; | |
2074 | ||
af5bc92d | 2075 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2076 | |
197cd65a AM |
2077 | for (i = 0; i < sbi->s_groups_count; i++) { |
2078 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2079 | ||
ce421581 | 2080 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2081 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2082 | else |
2083 | last_block = first_block + | |
617ba13b | 2084 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2085 | |
bfff6873 LC |
2086 | if ((grp == sbi->s_groups_count) && |
2087 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2088 | grp = i; | |
2089 | ||
8fadc143 | 2090 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2091 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2092 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2093 | "Block bitmap for group %u not in group " |
b31e1552 | 2094 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2095 | return 0; |
2096 | } | |
8fadc143 | 2097 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2098 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2099 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2100 | "Inode bitmap for group %u not in group " |
b31e1552 | 2101 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2102 | return 0; |
2103 | } | |
8fadc143 | 2104 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2105 | if (inode_table < first_block || |
2b2d6d01 | 2106 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2107 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2108 | "Inode table for group %u not in group " |
b31e1552 | 2109 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2110 | return 0; |
2111 | } | |
955ce5f5 | 2112 | ext4_lock_group(sb, i); |
feb0ab32 | 2113 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2114 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2115 | "Checksum for group %u failed (%u!=%u)", | |
2116 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2117 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2118 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2119 | ext4_unlock_group(sb, i); |
8a266467 | 2120 | return 0; |
7ee1ec4c | 2121 | } |
717d50e4 | 2122 | } |
955ce5f5 | 2123 | ext4_unlock_group(sb, i); |
ce421581 JS |
2124 | if (!flexbg_flag) |
2125 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2126 | } |
bfff6873 LC |
2127 | if (NULL != first_not_zeroed) |
2128 | *first_not_zeroed = grp; | |
ac27a0ec | 2129 | |
5dee5437 TT |
2130 | ext4_free_blocks_count_set(sbi->s_es, |
2131 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2132 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2133 | return 1; |
2134 | } | |
2135 | ||
617ba13b | 2136 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2137 | * the superblock) which were deleted from all directories, but held open by |
2138 | * a process at the time of a crash. We walk the list and try to delete these | |
2139 | * inodes at recovery time (only with a read-write filesystem). | |
2140 | * | |
2141 | * In order to keep the orphan inode chain consistent during traversal (in | |
2142 | * case of crash during recovery), we link each inode into the superblock | |
2143 | * orphan list_head and handle it the same way as an inode deletion during | |
2144 | * normal operation (which journals the operations for us). | |
2145 | * | |
2146 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2147 | * accidentally point at an in-use or already deleted inode. The worst that | |
2148 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2149 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2150 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2151 | * inode cleanup for us, so we can safely abort without any further action. | |
2152 | */ | |
2b2d6d01 TT |
2153 | static void ext4_orphan_cleanup(struct super_block *sb, |
2154 | struct ext4_super_block *es) | |
ac27a0ec DK |
2155 | { |
2156 | unsigned int s_flags = sb->s_flags; | |
2157 | int nr_orphans = 0, nr_truncates = 0; | |
2158 | #ifdef CONFIG_QUOTA | |
2159 | int i; | |
2160 | #endif | |
2161 | if (!es->s_last_orphan) { | |
2162 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2163 | return; | |
2164 | } | |
2165 | ||
a8f48a95 | 2166 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2167 | ext4_msg(sb, KERN_ERR, "write access " |
2168 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2169 | return; |
2170 | } | |
2171 | ||
d39195c3 AG |
2172 | /* Check if feature set would not allow a r/w mount */ |
2173 | if (!ext4_feature_set_ok(sb, 0)) { | |
2174 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2175 | "unknown ROCOMPAT features"); | |
2176 | return; | |
2177 | } | |
2178 | ||
617ba13b | 2179 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2180 | if (es->s_last_orphan) |
2181 | jbd_debug(1, "Errors on filesystem, " | |
2182 | "clearing orphan list.\n"); | |
2183 | es->s_last_orphan = 0; | |
2184 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2185 | return; | |
2186 | } | |
2187 | ||
2188 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2189 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2190 | sb->s_flags &= ~MS_RDONLY; |
2191 | } | |
2192 | #ifdef CONFIG_QUOTA | |
2193 | /* Needed for iput() to work correctly and not trash data */ | |
2194 | sb->s_flags |= MS_ACTIVE; | |
2195 | /* Turn on quotas so that they are updated correctly */ | |
2196 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2197 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2198 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2199 | if (ret < 0) |
b31e1552 ES |
2200 | ext4_msg(sb, KERN_ERR, |
2201 | "Cannot turn on journaled " | |
2202 | "quota: error %d", ret); | |
ac27a0ec DK |
2203 | } |
2204 | } | |
2205 | #endif | |
2206 | ||
2207 | while (es->s_last_orphan) { | |
2208 | struct inode *inode; | |
2209 | ||
97bd42b9 JB |
2210 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2211 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2212 | es->s_last_orphan = 0; |
2213 | break; | |
2214 | } | |
2215 | ||
617ba13b | 2216 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2217 | dquot_initialize(inode); |
ac27a0ec | 2218 | if (inode->i_nlink) { |
b31e1552 ES |
2219 | ext4_msg(sb, KERN_DEBUG, |
2220 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2221 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2222 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2223 | inode->i_ino, inode->i_size); |
617ba13b | 2224 | ext4_truncate(inode); |
ac27a0ec DK |
2225 | nr_truncates++; |
2226 | } else { | |
b31e1552 ES |
2227 | ext4_msg(sb, KERN_DEBUG, |
2228 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2229 | __func__, inode->i_ino); |
ac27a0ec DK |
2230 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2231 | inode->i_ino); | |
2232 | nr_orphans++; | |
2233 | } | |
2234 | iput(inode); /* The delete magic happens here! */ | |
2235 | } | |
2236 | ||
2b2d6d01 | 2237 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2238 | |
2239 | if (nr_orphans) | |
b31e1552 ES |
2240 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2241 | PLURAL(nr_orphans)); | |
ac27a0ec | 2242 | if (nr_truncates) |
b31e1552 ES |
2243 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2244 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2245 | #ifdef CONFIG_QUOTA |
2246 | /* Turn quotas off */ | |
2247 | for (i = 0; i < MAXQUOTAS; i++) { | |
2248 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2249 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2250 | } |
2251 | #endif | |
2252 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2253 | } | |
0b8e58a1 | 2254 | |
cd2291a4 ES |
2255 | /* |
2256 | * Maximal extent format file size. | |
2257 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2258 | * extent format containers, within a sector_t, and within i_blocks | |
2259 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2260 | * so that won't be a limiting factor. | |
2261 | * | |
f17722f9 LC |
2262 | * However there is other limiting factor. We do store extents in the form |
2263 | * of starting block and length, hence the resulting length of the extent | |
2264 | * covering maximum file size must fit into on-disk format containers as | |
2265 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2266 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2267 | * | |
cd2291a4 ES |
2268 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2269 | */ | |
f287a1a5 | 2270 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2271 | { |
2272 | loff_t res; | |
2273 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2274 | ||
2275 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2276 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2277 | /* |
90c699a9 | 2278 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2279 | * i_block represent total blocks in 512 bytes |
2280 | * 32 == size of vfs inode i_blocks * 8 | |
2281 | */ | |
2282 | upper_limit = (1LL << 32) - 1; | |
2283 | ||
2284 | /* total blocks in file system block size */ | |
2285 | upper_limit >>= (blkbits - 9); | |
2286 | upper_limit <<= blkbits; | |
2287 | } | |
2288 | ||
f17722f9 LC |
2289 | /* |
2290 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2291 | * by one fs block, so ee_len can cover the extent of maximum file | |
2292 | * size | |
2293 | */ | |
2294 | res = (1LL << 32) - 1; | |
cd2291a4 | 2295 | res <<= blkbits; |
cd2291a4 ES |
2296 | |
2297 | /* Sanity check against vm- & vfs- imposed limits */ | |
2298 | if (res > upper_limit) | |
2299 | res = upper_limit; | |
2300 | ||
2301 | return res; | |
2302 | } | |
ac27a0ec | 2303 | |
ac27a0ec | 2304 | /* |
cd2291a4 | 2305 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2306 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2307 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2308 | */ |
f287a1a5 | 2309 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2310 | { |
617ba13b | 2311 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2312 | int meta_blocks; |
2313 | loff_t upper_limit; | |
0b8e58a1 AD |
2314 | /* This is calculated to be the largest file size for a dense, block |
2315 | * mapped file such that the file's total number of 512-byte sectors, | |
2316 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2317 | * | |
2318 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2319 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2320 | */ |
2321 | ||
f287a1a5 | 2322 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2323 | /* |
90c699a9 | 2324 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2325 | * the inode i_block field represents total file blocks in |
2326 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2327 | */ |
2328 | upper_limit = (1LL << 32) - 1; | |
2329 | ||
2330 | /* total blocks in file system block size */ | |
2331 | upper_limit >>= (bits - 9); | |
2332 | ||
2333 | } else { | |
8180a562 AK |
2334 | /* |
2335 | * We use 48 bit ext4_inode i_blocks | |
2336 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2337 | * represent total number of blocks in | |
2338 | * file system block size | |
2339 | */ | |
0fc1b451 AK |
2340 | upper_limit = (1LL << 48) - 1; |
2341 | ||
0fc1b451 AK |
2342 | } |
2343 | ||
2344 | /* indirect blocks */ | |
2345 | meta_blocks = 1; | |
2346 | /* double indirect blocks */ | |
2347 | meta_blocks += 1 + (1LL << (bits-2)); | |
2348 | /* tripple indirect blocks */ | |
2349 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2350 | ||
2351 | upper_limit -= meta_blocks; | |
2352 | upper_limit <<= bits; | |
ac27a0ec DK |
2353 | |
2354 | res += 1LL << (bits-2); | |
2355 | res += 1LL << (2*(bits-2)); | |
2356 | res += 1LL << (3*(bits-2)); | |
2357 | res <<= bits; | |
2358 | if (res > upper_limit) | |
2359 | res = upper_limit; | |
0fc1b451 AK |
2360 | |
2361 | if (res > MAX_LFS_FILESIZE) | |
2362 | res = MAX_LFS_FILESIZE; | |
2363 | ||
ac27a0ec DK |
2364 | return res; |
2365 | } | |
2366 | ||
617ba13b | 2367 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2368 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2369 | { |
617ba13b | 2370 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2371 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2372 | int has_super = 0; |
2373 | ||
2374 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2375 | ||
617ba13b | 2376 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2377 | nr < first_meta_bg) |
70bbb3e0 | 2378 | return logical_sb_block + nr + 1; |
ac27a0ec | 2379 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2380 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2381 | has_super = 1; |
0b8e58a1 | 2382 | |
617ba13b | 2383 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2384 | } |
2385 | ||
c9de560d AT |
2386 | /** |
2387 | * ext4_get_stripe_size: Get the stripe size. | |
2388 | * @sbi: In memory super block info | |
2389 | * | |
2390 | * If we have specified it via mount option, then | |
2391 | * use the mount option value. If the value specified at mount time is | |
2392 | * greater than the blocks per group use the super block value. | |
2393 | * If the super block value is greater than blocks per group return 0. | |
2394 | * Allocator needs it be less than blocks per group. | |
2395 | * | |
2396 | */ | |
2397 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2398 | { | |
2399 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2400 | unsigned long stripe_width = | |
2401 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2402 | int ret; |
c9de560d AT |
2403 | |
2404 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2405 | ret = sbi->s_stripe; |
2406 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2407 | ret = stripe_width; | |
2408 | else if (stride <= sbi->s_blocks_per_group) | |
2409 | ret = stride; | |
2410 | else | |
2411 | ret = 0; | |
c9de560d | 2412 | |
3eb08658 DE |
2413 | /* |
2414 | * If the stripe width is 1, this makes no sense and | |
2415 | * we set it to 0 to turn off stripe handling code. | |
2416 | */ | |
2417 | if (ret <= 1) | |
2418 | ret = 0; | |
c9de560d | 2419 | |
3eb08658 | 2420 | return ret; |
c9de560d | 2421 | } |
ac27a0ec | 2422 | |
3197ebdb TT |
2423 | /* sysfs supprt */ |
2424 | ||
2425 | struct ext4_attr { | |
2426 | struct attribute attr; | |
2427 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2428 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2429 | const char *, size_t); |
2430 | int offset; | |
2431 | }; | |
2432 | ||
2433 | static int parse_strtoul(const char *buf, | |
2434 | unsigned long max, unsigned long *value) | |
2435 | { | |
2436 | char *endp; | |
2437 | ||
e7d2860b AGR |
2438 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2439 | endp = skip_spaces(endp); | |
3197ebdb TT |
2440 | if (*endp || *value > max) |
2441 | return -EINVAL; | |
2442 | ||
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2447 | struct ext4_sb_info *sbi, | |
2448 | char *buf) | |
2449 | { | |
2450 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2451 | (s64) EXT4_C2B(sbi, |
2452 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2453 | } |
2454 | ||
2455 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2456 | struct ext4_sb_info *sbi, char *buf) | |
2457 | { | |
2458 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2459 | ||
f613dfcb TT |
2460 | if (!sb->s_bdev->bd_part) |
2461 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2462 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2463 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2464 | sbi->s_sectors_written_start) >> 1); | |
2465 | } | |
2466 | ||
2467 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2468 | struct ext4_sb_info *sbi, char *buf) | |
2469 | { | |
2470 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2471 | ||
f613dfcb TT |
2472 | if (!sb->s_bdev->bd_part) |
2473 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2474 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2475 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2476 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2477 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2478 | } |
2479 | ||
2480 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2481 | struct ext4_sb_info *sbi, | |
2482 | const char *buf, size_t count) | |
2483 | { | |
2484 | unsigned long t; | |
2485 | ||
2486 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2487 | return -EINVAL; | |
2488 | ||
5dbd571d | 2489 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2490 | return -EINVAL; |
2491 | ||
2492 | sbi->s_inode_readahead_blks = t; | |
2493 | return count; | |
2494 | } | |
2495 | ||
2496 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2497 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2498 | { |
2499 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2500 | ||
2501 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2502 | } | |
2503 | ||
2504 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2505 | struct ext4_sb_info *sbi, | |
2506 | const char *buf, size_t count) | |
2507 | { | |
2508 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2509 | unsigned long t; | |
2510 | ||
2511 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2512 | return -EINVAL; | |
2513 | *ui = t; | |
2514 | return count; | |
2515 | } | |
2516 | ||
2c0544b2 TT |
2517 | static ssize_t trigger_test_error(struct ext4_attr *a, |
2518 | struct ext4_sb_info *sbi, | |
2519 | const char *buf, size_t count) | |
2520 | { | |
2521 | int len = count; | |
2522 | ||
2523 | if (!capable(CAP_SYS_ADMIN)) | |
2524 | return -EPERM; | |
2525 | ||
2526 | if (len && buf[len-1] == '\n') | |
2527 | len--; | |
2528 | ||
2529 | if (len) | |
2530 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
2531 | return count; | |
2532 | } | |
2533 | ||
3197ebdb TT |
2534 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
2535 | static struct ext4_attr ext4_attr_##_name = { \ | |
2536 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2537 | .show = _show, \ | |
2538 | .store = _store, \ | |
2539 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2540 | } | |
2541 | #define EXT4_ATTR(name, mode, show, store) \ | |
2542 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2543 | ||
857ac889 | 2544 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2545 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2546 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2547 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2548 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2549 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2550 | ||
2551 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2552 | EXT4_RO_ATTR(session_write_kbytes); | |
2553 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2554 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2555 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2556 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2557 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2558 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2559 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2560 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2561 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2562 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2563 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
67a5da56 | 2564 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
2c0544b2 | 2565 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
3197ebdb TT |
2566 | |
2567 | static struct attribute *ext4_attrs[] = { | |
2568 | ATTR_LIST(delayed_allocation_blocks), | |
2569 | ATTR_LIST(session_write_kbytes), | |
2570 | ATTR_LIST(lifetime_write_kbytes), | |
2571 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2572 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2573 | ATTR_LIST(mb_stats), |
2574 | ATTR_LIST(mb_max_to_scan), | |
2575 | ATTR_LIST(mb_min_to_scan), | |
2576 | ATTR_LIST(mb_order2_req), | |
2577 | ATTR_LIST(mb_stream_req), | |
2578 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2579 | ATTR_LIST(max_writeback_mb_bump), |
67a5da56 | 2580 | ATTR_LIST(extent_max_zeroout_kb), |
2c0544b2 | 2581 | ATTR_LIST(trigger_fs_error), |
3197ebdb TT |
2582 | NULL, |
2583 | }; | |
2584 | ||
857ac889 LC |
2585 | /* Features this copy of ext4 supports */ |
2586 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2587 | EXT4_INFO_ATTR(batched_discard); |
5e7bbef1 | 2588 | EXT4_INFO_ATTR(meta_bg_resize); |
857ac889 LC |
2589 | |
2590 | static struct attribute *ext4_feat_attrs[] = { | |
2591 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2592 | ATTR_LIST(batched_discard), |
5e7bbef1 | 2593 | ATTR_LIST(meta_bg_resize), |
857ac889 LC |
2594 | NULL, |
2595 | }; | |
2596 | ||
3197ebdb TT |
2597 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2598 | struct attribute *attr, char *buf) | |
2599 | { | |
2600 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2601 | s_kobj); | |
2602 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2603 | ||
2604 | return a->show ? a->show(a, sbi, buf) : 0; | |
2605 | } | |
2606 | ||
2607 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2608 | struct attribute *attr, | |
2609 | const char *buf, size_t len) | |
2610 | { | |
2611 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2612 | s_kobj); | |
2613 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2614 | ||
2615 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2616 | } | |
2617 | ||
2618 | static void ext4_sb_release(struct kobject *kobj) | |
2619 | { | |
2620 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2621 | s_kobj); | |
2622 | complete(&sbi->s_kobj_unregister); | |
2623 | } | |
2624 | ||
52cf25d0 | 2625 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2626 | .show = ext4_attr_show, |
2627 | .store = ext4_attr_store, | |
2628 | }; | |
2629 | ||
2630 | static struct kobj_type ext4_ktype = { | |
2631 | .default_attrs = ext4_attrs, | |
2632 | .sysfs_ops = &ext4_attr_ops, | |
2633 | .release = ext4_sb_release, | |
2634 | }; | |
2635 | ||
857ac889 LC |
2636 | static void ext4_feat_release(struct kobject *kobj) |
2637 | { | |
2638 | complete(&ext4_feat->f_kobj_unregister); | |
2639 | } | |
2640 | ||
2641 | static struct kobj_type ext4_feat_ktype = { | |
2642 | .default_attrs = ext4_feat_attrs, | |
2643 | .sysfs_ops = &ext4_attr_ops, | |
2644 | .release = ext4_feat_release, | |
2645 | }; | |
2646 | ||
a13fb1a4 ES |
2647 | /* |
2648 | * Check whether this filesystem can be mounted based on | |
2649 | * the features present and the RDONLY/RDWR mount requested. | |
2650 | * Returns 1 if this filesystem can be mounted as requested, | |
2651 | * 0 if it cannot be. | |
2652 | */ | |
2653 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2654 | { | |
2655 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2656 | ext4_msg(sb, KERN_ERR, | |
2657 | "Couldn't mount because of " | |
2658 | "unsupported optional features (%x)", | |
2659 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2660 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2661 | return 0; | |
2662 | } | |
2663 | ||
2664 | if (readonly) | |
2665 | return 1; | |
2666 | ||
2667 | /* Check that feature set is OK for a read-write mount */ | |
2668 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2669 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2670 | "unsupported optional features (%x)", | |
2671 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2672 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2673 | return 0; | |
2674 | } | |
2675 | /* | |
2676 | * Large file size enabled file system can only be mounted | |
2677 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2678 | */ | |
2679 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2680 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2681 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2682 | "cannot be mounted RDWR without " | |
2683 | "CONFIG_LBDAF"); | |
2684 | return 0; | |
2685 | } | |
2686 | } | |
bab08ab9 TT |
2687 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2688 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2689 | ext4_msg(sb, KERN_ERR, | |
2690 | "Can't support bigalloc feature without " | |
2691 | "extents feature\n"); | |
2692 | return 0; | |
2693 | } | |
7c319d32 AK |
2694 | |
2695 | #ifndef CONFIG_QUOTA | |
2696 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
2697 | !readonly) { | |
2698 | ext4_msg(sb, KERN_ERR, | |
2699 | "Filesystem with quota feature cannot be mounted RDWR " | |
2700 | "without CONFIG_QUOTA"); | |
2701 | return 0; | |
2702 | } | |
2703 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2704 | return 1; |
2705 | } | |
2706 | ||
66e61a9e TT |
2707 | /* |
2708 | * This function is called once a day if we have errors logged | |
2709 | * on the file system | |
2710 | */ | |
2711 | static void print_daily_error_info(unsigned long arg) | |
2712 | { | |
2713 | struct super_block *sb = (struct super_block *) arg; | |
2714 | struct ext4_sb_info *sbi; | |
2715 | struct ext4_super_block *es; | |
2716 | ||
2717 | sbi = EXT4_SB(sb); | |
2718 | es = sbi->s_es; | |
2719 | ||
2720 | if (es->s_error_count) | |
2721 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2722 | le32_to_cpu(es->s_error_count)); | |
2723 | if (es->s_first_error_time) { | |
2724 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2725 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2726 | (int) sizeof(es->s_first_error_func), | |
2727 | es->s_first_error_func, | |
2728 | le32_to_cpu(es->s_first_error_line)); | |
2729 | if (es->s_first_error_ino) | |
2730 | printk(": inode %u", | |
2731 | le32_to_cpu(es->s_first_error_ino)); | |
2732 | if (es->s_first_error_block) | |
2733 | printk(": block %llu", (unsigned long long) | |
2734 | le64_to_cpu(es->s_first_error_block)); | |
2735 | printk("\n"); | |
2736 | } | |
2737 | if (es->s_last_error_time) { | |
2738 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2739 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2740 | (int) sizeof(es->s_last_error_func), | |
2741 | es->s_last_error_func, | |
2742 | le32_to_cpu(es->s_last_error_line)); | |
2743 | if (es->s_last_error_ino) | |
2744 | printk(": inode %u", | |
2745 | le32_to_cpu(es->s_last_error_ino)); | |
2746 | if (es->s_last_error_block) | |
2747 | printk(": block %llu", (unsigned long long) | |
2748 | le64_to_cpu(es->s_last_error_block)); | |
2749 | printk("\n"); | |
2750 | } | |
2751 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2752 | } | |
2753 | ||
bfff6873 LC |
2754 | /* Find next suitable group and run ext4_init_inode_table */ |
2755 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2756 | { | |
2757 | struct ext4_group_desc *gdp = NULL; | |
2758 | ext4_group_t group, ngroups; | |
2759 | struct super_block *sb; | |
2760 | unsigned long timeout = 0; | |
2761 | int ret = 0; | |
2762 | ||
2763 | sb = elr->lr_super; | |
2764 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2765 | ||
8e8ad8a5 | 2766 | sb_start_write(sb); |
bfff6873 LC |
2767 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2768 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2769 | if (!gdp) { | |
2770 | ret = 1; | |
2771 | break; | |
2772 | } | |
2773 | ||
2774 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2775 | break; | |
2776 | } | |
2777 | ||
2778 | if (group == ngroups) | |
2779 | ret = 1; | |
2780 | ||
2781 | if (!ret) { | |
2782 | timeout = jiffies; | |
2783 | ret = ext4_init_inode_table(sb, group, | |
2784 | elr->lr_timeout ? 0 : 1); | |
2785 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2786 | timeout = (jiffies - timeout) * |
2787 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2788 | elr->lr_timeout = timeout; |
2789 | } | |
2790 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2791 | elr->lr_next_group = group + 1; | |
2792 | } | |
8e8ad8a5 | 2793 | sb_end_write(sb); |
bfff6873 LC |
2794 | |
2795 | return ret; | |
2796 | } | |
2797 | ||
2798 | /* | |
2799 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2800 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2801 | */ |
2802 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2803 | { | |
2804 | struct ext4_sb_info *sbi; | |
2805 | ||
2806 | if (!elr) | |
2807 | return; | |
2808 | ||
2809 | sbi = elr->lr_sbi; | |
2810 | ||
2811 | list_del(&elr->lr_request); | |
2812 | sbi->s_li_request = NULL; | |
2813 | kfree(elr); | |
2814 | } | |
2815 | ||
2816 | static void ext4_unregister_li_request(struct super_block *sb) | |
2817 | { | |
1bb933fb LC |
2818 | mutex_lock(&ext4_li_mtx); |
2819 | if (!ext4_li_info) { | |
2820 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2821 | return; |
1bb933fb | 2822 | } |
bfff6873 LC |
2823 | |
2824 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2825 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2826 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2827 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2828 | } |
2829 | ||
8f1f7453 ES |
2830 | static struct task_struct *ext4_lazyinit_task; |
2831 | ||
bfff6873 LC |
2832 | /* |
2833 | * This is the function where ext4lazyinit thread lives. It walks | |
2834 | * through the request list searching for next scheduled filesystem. | |
2835 | * When such a fs is found, run the lazy initialization request | |
2836 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2837 | * function. Based on that time we compute next schedule time of | |
2838 | * the request. When walking through the list is complete, compute | |
2839 | * next waking time and put itself into sleep. | |
2840 | */ | |
2841 | static int ext4_lazyinit_thread(void *arg) | |
2842 | { | |
2843 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2844 | struct list_head *pos, *n; | |
2845 | struct ext4_li_request *elr; | |
4ed5c033 | 2846 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2847 | |
2848 | BUG_ON(NULL == eli); | |
2849 | ||
bfff6873 LC |
2850 | cont_thread: |
2851 | while (true) { | |
2852 | next_wakeup = MAX_JIFFY_OFFSET; | |
2853 | ||
2854 | mutex_lock(&eli->li_list_mtx); | |
2855 | if (list_empty(&eli->li_request_list)) { | |
2856 | mutex_unlock(&eli->li_list_mtx); | |
2857 | goto exit_thread; | |
2858 | } | |
2859 | ||
2860 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2861 | elr = list_entry(pos, struct ext4_li_request, | |
2862 | lr_request); | |
2863 | ||
b2c78cd0 TT |
2864 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2865 | if (ext4_run_li_request(elr) != 0) { | |
2866 | /* error, remove the lazy_init job */ | |
2867 | ext4_remove_li_request(elr); | |
2868 | continue; | |
2869 | } | |
bfff6873 LC |
2870 | } |
2871 | ||
2872 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2873 | next_wakeup = elr->lr_next_sched; | |
2874 | } | |
2875 | mutex_unlock(&eli->li_list_mtx); | |
2876 | ||
a0acae0e | 2877 | try_to_freeze(); |
bfff6873 | 2878 | |
4ed5c033 LC |
2879 | cur = jiffies; |
2880 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2881 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2882 | cond_resched(); |
2883 | continue; | |
2884 | } | |
2885 | ||
4ed5c033 LC |
2886 | schedule_timeout_interruptible(next_wakeup - cur); |
2887 | ||
8f1f7453 ES |
2888 | if (kthread_should_stop()) { |
2889 | ext4_clear_request_list(); | |
2890 | goto exit_thread; | |
2891 | } | |
bfff6873 LC |
2892 | } |
2893 | ||
2894 | exit_thread: | |
2895 | /* | |
2896 | * It looks like the request list is empty, but we need | |
2897 | * to check it under the li_list_mtx lock, to prevent any | |
2898 | * additions into it, and of course we should lock ext4_li_mtx | |
2899 | * to atomically free the list and ext4_li_info, because at | |
2900 | * this point another ext4 filesystem could be registering | |
2901 | * new one. | |
2902 | */ | |
2903 | mutex_lock(&ext4_li_mtx); | |
2904 | mutex_lock(&eli->li_list_mtx); | |
2905 | if (!list_empty(&eli->li_request_list)) { | |
2906 | mutex_unlock(&eli->li_list_mtx); | |
2907 | mutex_unlock(&ext4_li_mtx); | |
2908 | goto cont_thread; | |
2909 | } | |
2910 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2911 | kfree(ext4_li_info); |
2912 | ext4_li_info = NULL; | |
2913 | mutex_unlock(&ext4_li_mtx); | |
2914 | ||
2915 | return 0; | |
2916 | } | |
2917 | ||
2918 | static void ext4_clear_request_list(void) | |
2919 | { | |
2920 | struct list_head *pos, *n; | |
2921 | struct ext4_li_request *elr; | |
2922 | ||
2923 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2924 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2925 | elr = list_entry(pos, struct ext4_li_request, | |
2926 | lr_request); | |
2927 | ext4_remove_li_request(elr); | |
2928 | } | |
2929 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2930 | } | |
2931 | ||
2932 | static int ext4_run_lazyinit_thread(void) | |
2933 | { | |
8f1f7453 ES |
2934 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2935 | ext4_li_info, "ext4lazyinit"); | |
2936 | if (IS_ERR(ext4_lazyinit_task)) { | |
2937 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2938 | ext4_clear_request_list(); |
bfff6873 LC |
2939 | kfree(ext4_li_info); |
2940 | ext4_li_info = NULL; | |
92b97816 | 2941 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2942 | "initialization thread\n", |
2943 | err); | |
2944 | return err; | |
2945 | } | |
2946 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2947 | return 0; |
2948 | } | |
2949 | ||
2950 | /* | |
2951 | * Check whether it make sense to run itable init. thread or not. | |
2952 | * If there is at least one uninitialized inode table, return | |
2953 | * corresponding group number, else the loop goes through all | |
2954 | * groups and return total number of groups. | |
2955 | */ | |
2956 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2957 | { | |
2958 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2959 | struct ext4_group_desc *gdp = NULL; | |
2960 | ||
2961 | for (group = 0; group < ngroups; group++) { | |
2962 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2963 | if (!gdp) | |
2964 | continue; | |
2965 | ||
2966 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2967 | break; | |
2968 | } | |
2969 | ||
2970 | return group; | |
2971 | } | |
2972 | ||
2973 | static int ext4_li_info_new(void) | |
2974 | { | |
2975 | struct ext4_lazy_init *eli = NULL; | |
2976 | ||
2977 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2978 | if (!eli) | |
2979 | return -ENOMEM; | |
2980 | ||
bfff6873 LC |
2981 | INIT_LIST_HEAD(&eli->li_request_list); |
2982 | mutex_init(&eli->li_list_mtx); | |
2983 | ||
bfff6873 LC |
2984 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2985 | ||
2986 | ext4_li_info = eli; | |
2987 | ||
2988 | return 0; | |
2989 | } | |
2990 | ||
2991 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2992 | ext4_group_t start) | |
2993 | { | |
2994 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2995 | struct ext4_li_request *elr; | |
2996 | unsigned long rnd; | |
2997 | ||
2998 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2999 | if (!elr) | |
3000 | return NULL; | |
3001 | ||
3002 | elr->lr_super = sb; | |
3003 | elr->lr_sbi = sbi; | |
3004 | elr->lr_next_group = start; | |
3005 | ||
3006 | /* | |
3007 | * Randomize first schedule time of the request to | |
3008 | * spread the inode table initialization requests | |
3009 | * better. | |
3010 | */ | |
3011 | get_random_bytes(&rnd, sizeof(rnd)); | |
3012 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
3013 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
3014 | ||
3015 | return elr; | |
3016 | } | |
3017 | ||
3018 | static int ext4_register_li_request(struct super_block *sb, | |
3019 | ext4_group_t first_not_zeroed) | |
3020 | { | |
3021 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3022 | struct ext4_li_request *elr; | |
3023 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 3024 | int ret = 0; |
bfff6873 | 3025 | |
51ce6511 LC |
3026 | if (sbi->s_li_request != NULL) { |
3027 | /* | |
3028 | * Reset timeout so it can be computed again, because | |
3029 | * s_li_wait_mult might have changed. | |
3030 | */ | |
3031 | sbi->s_li_request->lr_timeout = 0; | |
beed5ecb | 3032 | return 0; |
51ce6511 | 3033 | } |
bfff6873 LC |
3034 | |
3035 | if (first_not_zeroed == ngroups || | |
3036 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3037 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 3038 | return 0; |
bfff6873 LC |
3039 | |
3040 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
3041 | if (!elr) |
3042 | return -ENOMEM; | |
bfff6873 LC |
3043 | |
3044 | mutex_lock(&ext4_li_mtx); | |
3045 | ||
3046 | if (NULL == ext4_li_info) { | |
3047 | ret = ext4_li_info_new(); | |
3048 | if (ret) | |
3049 | goto out; | |
3050 | } | |
3051 | ||
3052 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3053 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3054 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3055 | ||
3056 | sbi->s_li_request = elr; | |
46e4690b TM |
3057 | /* |
3058 | * set elr to NULL here since it has been inserted to | |
3059 | * the request_list and the removal and free of it is | |
3060 | * handled by ext4_clear_request_list from now on. | |
3061 | */ | |
3062 | elr = NULL; | |
bfff6873 LC |
3063 | |
3064 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3065 | ret = ext4_run_lazyinit_thread(); | |
3066 | if (ret) | |
3067 | goto out; | |
3068 | } | |
bfff6873 | 3069 | out: |
beed5ecb NK |
3070 | mutex_unlock(&ext4_li_mtx); |
3071 | if (ret) | |
bfff6873 | 3072 | kfree(elr); |
bfff6873 LC |
3073 | return ret; |
3074 | } | |
3075 | ||
3076 | /* | |
3077 | * We do not need to lock anything since this is called on | |
3078 | * module unload. | |
3079 | */ | |
3080 | static void ext4_destroy_lazyinit_thread(void) | |
3081 | { | |
3082 | /* | |
3083 | * If thread exited earlier | |
3084 | * there's nothing to be done. | |
3085 | */ | |
8f1f7453 | 3086 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3087 | return; |
3088 | ||
8f1f7453 | 3089 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3090 | } |
3091 | ||
25ed6e8a DW |
3092 | static int set_journal_csum_feature_set(struct super_block *sb) |
3093 | { | |
3094 | int ret = 1; | |
3095 | int compat, incompat; | |
3096 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3097 | ||
3098 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3099 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3100 | /* journal checksum v2 */ | |
3101 | compat = 0; | |
3102 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; | |
3103 | } else { | |
3104 | /* journal checksum v1 */ | |
3105 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3106 | incompat = 0; | |
3107 | } | |
3108 | ||
3109 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3110 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3111 | compat, 0, | |
3112 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3113 | incompat); | |
3114 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3115 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3116 | compat, 0, | |
3117 | incompat); | |
3118 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3119 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3120 | } else { | |
3121 | jbd2_journal_clear_features(sbi->s_journal, | |
3122 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3123 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3124 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
3125 | } | |
3126 | ||
3127 | return ret; | |
3128 | } | |
3129 | ||
952fc18e TT |
3130 | /* |
3131 | * Note: calculating the overhead so we can be compatible with | |
3132 | * historical BSD practice is quite difficult in the face of | |
3133 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3134 | * different block group can end up in the same allocation cluster. | |
3135 | * Calculating the exact overhead in the face of clustered allocation | |
3136 | * requires either O(all block bitmaps) in memory or O(number of block | |
3137 | * groups**2) in time. We will still calculate the superblock for | |
3138 | * older file systems --- and if we come across with a bigalloc file | |
3139 | * system with zero in s_overhead_clusters the estimate will be close to | |
3140 | * correct especially for very large cluster sizes --- but for newer | |
3141 | * file systems, it's better to calculate this figure once at mkfs | |
3142 | * time, and store it in the superblock. If the superblock value is | |
3143 | * present (even for non-bigalloc file systems), we will use it. | |
3144 | */ | |
3145 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3146 | char *buf) | |
3147 | { | |
3148 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3149 | struct ext4_group_desc *gdp; | |
3150 | ext4_fsblk_t first_block, last_block, b; | |
3151 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3152 | int s, j, count = 0; | |
3153 | ||
0548bbb8 TT |
3154 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) |
3155 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + | |
3156 | sbi->s_itb_per_group + 2); | |
3157 | ||
952fc18e TT |
3158 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3159 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3160 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3161 | for (i = 0; i < ngroups; i++) { | |
3162 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3163 | b = ext4_block_bitmap(sb, gdp); | |
3164 | if (b >= first_block && b <= last_block) { | |
3165 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3166 | count++; | |
3167 | } | |
3168 | b = ext4_inode_bitmap(sb, gdp); | |
3169 | if (b >= first_block && b <= last_block) { | |
3170 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3171 | count++; | |
3172 | } | |
3173 | b = ext4_inode_table(sb, gdp); | |
3174 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3175 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3176 | int c = EXT4_B2C(sbi, b - first_block); | |
3177 | ext4_set_bit(c, buf); | |
3178 | count++; | |
3179 | } | |
3180 | if (i != grp) | |
3181 | continue; | |
3182 | s = 0; | |
3183 | if (ext4_bg_has_super(sb, grp)) { | |
3184 | ext4_set_bit(s++, buf); | |
3185 | count++; | |
3186 | } | |
3187 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3188 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3189 | count++; | |
3190 | } | |
3191 | } | |
3192 | if (!count) | |
3193 | return 0; | |
3194 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3195 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3196 | } | |
3197 | ||
3198 | /* | |
3199 | * Compute the overhead and stash it in sbi->s_overhead | |
3200 | */ | |
3201 | int ext4_calculate_overhead(struct super_block *sb) | |
3202 | { | |
3203 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3204 | struct ext4_super_block *es = sbi->s_es; | |
3205 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3206 | ext4_fsblk_t overhead = 0; | |
3207 | char *buf = (char *) get_zeroed_page(GFP_KERNEL); | |
3208 | ||
3209 | memset(buf, 0, PAGE_SIZE); | |
3210 | if (!buf) | |
3211 | return -ENOMEM; | |
3212 | ||
3213 | /* | |
3214 | * Compute the overhead (FS structures). This is constant | |
3215 | * for a given filesystem unless the number of block groups | |
3216 | * changes so we cache the previous value until it does. | |
3217 | */ | |
3218 | ||
3219 | /* | |
3220 | * All of the blocks before first_data_block are overhead | |
3221 | */ | |
3222 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3223 | ||
3224 | /* | |
3225 | * Add the overhead found in each block group | |
3226 | */ | |
3227 | for (i = 0; i < ngroups; i++) { | |
3228 | int blks; | |
3229 | ||
3230 | blks = count_overhead(sb, i, buf); | |
3231 | overhead += blks; | |
3232 | if (blks) | |
3233 | memset(buf, 0, PAGE_SIZE); | |
3234 | cond_resched(); | |
3235 | } | |
3236 | sbi->s_overhead = overhead; | |
3237 | smp_wmb(); | |
3238 | free_page((unsigned long) buf); | |
3239 | return 0; | |
3240 | } | |
3241 | ||
2b2d6d01 | 3242 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3243 | { |
d4c402d9 | 3244 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3245 | struct buffer_head *bh; |
617ba13b MC |
3246 | struct ext4_super_block *es = NULL; |
3247 | struct ext4_sb_info *sbi; | |
3248 | ext4_fsblk_t block; | |
3249 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3250 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3251 | unsigned long offset = 0; |
ac27a0ec DK |
3252 | unsigned long journal_devnum = 0; |
3253 | unsigned long def_mount_opts; | |
3254 | struct inode *root; | |
9f6200bb | 3255 | char *cp; |
0390131b | 3256 | const char *descr; |
dcc7dae3 | 3257 | int ret = -ENOMEM; |
281b5995 | 3258 | int blocksize, clustersize; |
4ec11028 TT |
3259 | unsigned int db_count; |
3260 | unsigned int i; | |
281b5995 | 3261 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3262 | __u64 blocks_count; |
833f4077 | 3263 | int err; |
b3881f74 | 3264 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3265 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3266 | |
3267 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3268 | if (!sbi) | |
dcc7dae3 | 3269 | goto out_free_orig; |
705895b6 PE |
3270 | |
3271 | sbi->s_blockgroup_lock = | |
3272 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3273 | if (!sbi->s_blockgroup_lock) { | |
3274 | kfree(sbi); | |
dcc7dae3 | 3275 | goto out_free_orig; |
705895b6 | 3276 | } |
ac27a0ec | 3277 | sb->s_fs_info = sbi; |
2c0544b2 | 3278 | sbi->s_sb = sb; |
ac27a0ec | 3279 | sbi->s_mount_opt = 0; |
08cefc7a EB |
3280 | sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); |
3281 | sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); | |
240799cd | 3282 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3283 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3284 | if (sb->s_bdev->bd_part) |
3285 | sbi->s_sectors_written_start = | |
3286 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3287 | |
9f6200bb TT |
3288 | /* Cleanup superblock name */ |
3289 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3290 | *cp = '!'; | |
3291 | ||
dcc7dae3 | 3292 | ret = -EINVAL; |
617ba13b | 3293 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3294 | if (!blocksize) { |
b31e1552 | 3295 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3296 | goto out_fail; |
3297 | } | |
3298 | ||
3299 | /* | |
617ba13b | 3300 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3301 | * block sizes. We need to calculate the offset from buffer start. |
3302 | */ | |
617ba13b | 3303 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3304 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3305 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3306 | } else { |
70bbb3e0 | 3307 | logical_sb_block = sb_block; |
ac27a0ec DK |
3308 | } |
3309 | ||
70bbb3e0 | 3310 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3311 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3312 | goto out_fail; |
3313 | } | |
3314 | /* | |
3315 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3316 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3317 | */ |
2716b802 | 3318 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3319 | sbi->s_es = es; |
3320 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3321 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3322 | goto cantfind_ext4; | |
afc32f7e | 3323 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3324 | |
feb0ab32 DW |
3325 | /* Warn if metadata_csum and gdt_csum are both set. */ |
3326 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3327 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
3328 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) | |
3329 | ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " | |
3330 | "redundant flags; please run fsck."); | |
3331 | ||
d25425f8 DW |
3332 | /* Check for a known checksum algorithm */ |
3333 | if (!ext4_verify_csum_type(sb, es)) { | |
3334 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3335 | "unknown checksum algorithm."); | |
3336 | silent = 1; | |
3337 | goto cantfind_ext4; | |
3338 | } | |
3339 | ||
0441984a DW |
3340 | /* Load the checksum driver */ |
3341 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3342 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3343 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
3344 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3345 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3346 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3347 | sbi->s_chksum_driver = NULL; | |
3348 | goto failed_mount; | |
3349 | } | |
3350 | } | |
3351 | ||
a9c47317 DW |
3352 | /* Check superblock checksum */ |
3353 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3354 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3355 | "invalid superblock checksum. Run e2fsck?"); | |
3356 | silent = 1; | |
3357 | goto cantfind_ext4; | |
3358 | } | |
3359 | ||
3360 | /* Precompute checksum seed for all metadata */ | |
3361 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3362 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
3363 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, | |
3364 | sizeof(es->s_uuid)); | |
3365 | ||
ac27a0ec DK |
3366 | /* Set defaults before we parse the mount options */ |
3367 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3368 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3369 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3370 | set_opt(sb, DEBUG); |
87f26807 | 3371 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3372 | set_opt(sb, GRPID); |
617ba13b | 3373 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3374 | set_opt(sb, NO_UID32); |
ea663336 | 3375 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3376 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3377 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3378 | #endif |
03010a33 | 3379 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3380 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3381 | #endif |
6fd7a467 | 3382 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3383 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3384 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3385 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3386 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3387 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3388 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3389 | |
3390 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3391 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3392 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3393 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3394 | else |
fd8c37ec | 3395 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3396 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3397 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3398 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3399 | set_opt(sb, DISCARD); |
ac27a0ec | 3400 | |
08cefc7a EB |
3401 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3402 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3403 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3404 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3405 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3406 | |
8b67f04a | 3407 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3408 | set_opt(sb, BARRIER); |
ac27a0ec | 3409 | |
dd919b98 AK |
3410 | /* |
3411 | * enable delayed allocation by default | |
3412 | * Use -o nodelalloc to turn it off | |
3413 | */ | |
bc0b75f7 | 3414 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3415 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3416 | set_opt(sb, DELALLOC); |
dd919b98 | 3417 | |
51ce6511 LC |
3418 | /* |
3419 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3420 | * no mount option specified. | |
3421 | */ | |
3422 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3423 | ||
8b67f04a | 3424 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3425 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3426 | ext4_msg(sb, KERN_WARNING, |
3427 | "failed to parse options in superblock: %s", | |
3428 | sbi->s_es->s_mount_opts); | |
3429 | } | |
5a916be1 | 3430 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3431 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3432 | &journal_ioprio, 0)) |
ac27a0ec DK |
3433 | goto failed_mount; |
3434 | ||
56889787 TT |
3435 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3436 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3437 | "with data=journal disables delayed " | |
3438 | "allocation and O_DIRECT support!\n"); | |
3439 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3440 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3441 | "both data=journal and delalloc"); | |
3442 | goto failed_mount; | |
3443 | } | |
3444 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3445 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3446 | "both data=journal and delalloc"); | |
3447 | goto failed_mount; | |
3448 | } | |
3449 | if (test_opt(sb, DELALLOC)) | |
3450 | clear_opt(sb, DELALLOC); | |
3451 | } | |
3452 | ||
3453 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
3454 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3455 | if (blocksize < PAGE_SIZE) { | |
3456 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3457 | "dioread_nolock if block size != PAGE_SIZE"); | |
3458 | goto failed_mount; | |
3459 | } | |
3460 | } | |
3461 | ||
ac27a0ec | 3462 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3463 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3464 | |
617ba13b MC |
3465 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3466 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3467 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3468 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3469 | ext4_msg(sb, KERN_WARNING, |
3470 | "feature flags set on rev 0 fs, " | |
3471 | "running e2fsck is recommended"); | |
469108ff | 3472 | |
2035e776 TT |
3473 | if (IS_EXT2_SB(sb)) { |
3474 | if (ext2_feature_set_ok(sb)) | |
3475 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3476 | "using the ext4 subsystem"); | |
3477 | else { | |
3478 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3479 | "to feature incompatibilities"); | |
3480 | goto failed_mount; | |
3481 | } | |
3482 | } | |
3483 | ||
3484 | if (IS_EXT3_SB(sb)) { | |
3485 | if (ext3_feature_set_ok(sb)) | |
3486 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3487 | "using the ext4 subsystem"); | |
3488 | else { | |
3489 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3490 | "to feature incompatibilities"); | |
3491 | goto failed_mount; | |
3492 | } | |
3493 | } | |
3494 | ||
ac27a0ec DK |
3495 | /* |
3496 | * Check feature flags regardless of the revision level, since we | |
3497 | * previously didn't change the revision level when setting the flags, | |
3498 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3499 | */ | |
a13fb1a4 | 3500 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3501 | goto failed_mount; |
a13fb1a4 | 3502 | |
617ba13b MC |
3503 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3504 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3505 | ext4_msg(sb, KERN_ERR, |
3506 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3507 | goto failed_mount; |
3508 | } | |
3509 | ||
ac27a0ec | 3510 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3511 | /* Validate the filesystem blocksize */ |
3512 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3513 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3514 | blocksize); |
ac27a0ec DK |
3515 | goto failed_mount; |
3516 | } | |
3517 | ||
2b2d6d01 | 3518 | brelse(bh); |
70bbb3e0 AM |
3519 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3520 | offset = do_div(logical_sb_block, blocksize); | |
3521 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3522 | if (!bh) { |
b31e1552 ES |
3523 | ext4_msg(sb, KERN_ERR, |
3524 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3525 | goto failed_mount; |
3526 | } | |
2716b802 | 3527 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3528 | sbi->s_es = es; |
617ba13b | 3529 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3530 | ext4_msg(sb, KERN_ERR, |
3531 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3532 | goto failed_mount; |
3533 | } | |
3534 | } | |
3535 | ||
a13fb1a4 ES |
3536 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3537 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3538 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3539 | has_huge_files); | |
3540 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3541 | |
617ba13b MC |
3542 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3543 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3544 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3545 | } else { |
3546 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3547 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3548 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3549 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3550 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3551 | ext4_msg(sb, KERN_ERR, |
3552 | "unsupported inode size: %d", | |
2b2d6d01 | 3553 | sbi->s_inode_size); |
ac27a0ec DK |
3554 | goto failed_mount; |
3555 | } | |
ef7f3835 KS |
3556 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3557 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3558 | } |
0b8e58a1 | 3559 | |
0d1ee42f AR |
3560 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3561 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3562 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3563 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3564 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3565 | ext4_msg(sb, KERN_ERR, |
3566 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3567 | sbi->s_desc_size); |
3568 | goto failed_mount; | |
3569 | } | |
3570 | } else | |
3571 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3572 | |
ac27a0ec | 3573 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3574 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3575 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3576 | goto cantfind_ext4; |
0b8e58a1 | 3577 | |
617ba13b | 3578 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3579 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3580 | goto cantfind_ext4; |
ac27a0ec DK |
3581 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3582 | sbi->s_inodes_per_block; | |
0d1ee42f | 3583 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3584 | sbi->s_sbh = bh; |
3585 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3586 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3587 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3588 | |
2b2d6d01 | 3589 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3590 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3591 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3592 | i = le32_to_cpu(es->s_flags); |
3593 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3594 | sbi->s_hash_unsigned = 3; | |
3595 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3596 | #ifdef __CHAR_UNSIGNED__ | |
3597 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3598 | sbi->s_hash_unsigned = 3; | |
3599 | #else | |
3600 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3601 | #endif | |
f99b2589 | 3602 | } |
ac27a0ec | 3603 | |
281b5995 TT |
3604 | /* Handle clustersize */ |
3605 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3606 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3607 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3608 | if (has_bigalloc) { | |
3609 | if (clustersize < blocksize) { | |
3610 | ext4_msg(sb, KERN_ERR, | |
3611 | "cluster size (%d) smaller than " | |
3612 | "block size (%d)", clustersize, blocksize); | |
3613 | goto failed_mount; | |
3614 | } | |
3615 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3616 | le32_to_cpu(es->s_log_block_size); | |
3617 | sbi->s_clusters_per_group = | |
3618 | le32_to_cpu(es->s_clusters_per_group); | |
3619 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3620 | ext4_msg(sb, KERN_ERR, | |
3621 | "#clusters per group too big: %lu", | |
3622 | sbi->s_clusters_per_group); | |
3623 | goto failed_mount; | |
3624 | } | |
3625 | if (sbi->s_blocks_per_group != | |
3626 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3627 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3628 | "clusters per group (%lu) inconsistent", | |
3629 | sbi->s_blocks_per_group, | |
3630 | sbi->s_clusters_per_group); | |
3631 | goto failed_mount; | |
3632 | } | |
3633 | } else { | |
3634 | if (clustersize != blocksize) { | |
3635 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3636 | "block size (%d)", clustersize, | |
3637 | blocksize); | |
3638 | clustersize = blocksize; | |
3639 | } | |
3640 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3641 | ext4_msg(sb, KERN_ERR, | |
3642 | "#blocks per group too big: %lu", | |
3643 | sbi->s_blocks_per_group); | |
3644 | goto failed_mount; | |
3645 | } | |
3646 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3647 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3648 | } |
281b5995 TT |
3649 | sbi->s_cluster_ratio = clustersize / blocksize; |
3650 | ||
ac27a0ec | 3651 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3652 | ext4_msg(sb, KERN_ERR, |
3653 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3654 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3655 | goto failed_mount; |
3656 | } | |
3657 | ||
bf43d84b ES |
3658 | /* |
3659 | * Test whether we have more sectors than will fit in sector_t, | |
3660 | * and whether the max offset is addressable by the page cache. | |
3661 | */ | |
5a9ae68a | 3662 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3663 | ext4_blocks_count(es)); |
5a9ae68a | 3664 | if (err) { |
b31e1552 | 3665 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3666 | " too large to mount safely on this system"); |
ac27a0ec | 3667 | if (sizeof(sector_t) < 8) |
90c699a9 | 3668 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3669 | ret = err; |
ac27a0ec DK |
3670 | goto failed_mount; |
3671 | } | |
3672 | ||
617ba13b MC |
3673 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3674 | goto cantfind_ext4; | |
e7c95593 | 3675 | |
0f2ddca6 FTN |
3676 | /* check blocks count against device size */ |
3677 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3678 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3679 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3680 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3681 | ext4_blocks_count(es), blocks_count); |
3682 | goto failed_mount; | |
3683 | } | |
3684 | ||
0b8e58a1 AD |
3685 | /* |
3686 | * It makes no sense for the first data block to be beyond the end | |
3687 | * of the filesystem. | |
3688 | */ | |
3689 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3690 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3691 | "block %u is beyond end of filesystem (%llu)", |
3692 | le32_to_cpu(es->s_first_data_block), | |
3693 | ext4_blocks_count(es)); | |
e7c95593 ES |
3694 | goto failed_mount; |
3695 | } | |
bd81d8ee LV |
3696 | blocks_count = (ext4_blocks_count(es) - |
3697 | le32_to_cpu(es->s_first_data_block) + | |
3698 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3699 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3700 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3701 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3702 | "(block count %llu, first data block %u, " |
b31e1552 | 3703 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3704 | ext4_blocks_count(es), |
3705 | le32_to_cpu(es->s_first_data_block), | |
3706 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3707 | goto failed_mount; | |
3708 | } | |
bd81d8ee | 3709 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3710 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3711 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3712 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3713 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3714 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3715 | sizeof(struct buffer_head *), | |
3716 | GFP_KERNEL); | |
ac27a0ec | 3717 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3718 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3719 | ret = -ENOMEM; |
ac27a0ec DK |
3720 | goto failed_mount; |
3721 | } | |
3722 | ||
9f6200bb TT |
3723 | if (ext4_proc_root) |
3724 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3725 | |
66acdcf4 TT |
3726 | if (sbi->s_proc) |
3727 | proc_create_data("options", S_IRUGO, sbi->s_proc, | |
3728 | &ext4_seq_options_fops, sb); | |
3729 | ||
705895b6 | 3730 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3731 | |
3732 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3733 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3734 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3735 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3736 | ext4_msg(sb, KERN_ERR, |
3737 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3738 | db_count = i; |
3739 | goto failed_mount2; | |
3740 | } | |
3741 | } | |
bfff6873 | 3742 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3743 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3744 | goto failed_mount2; |
3745 | } | |
772cb7c8 JS |
3746 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3747 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3748 | ext4_msg(sb, KERN_ERR, |
3749 | "unable to initialize " | |
3750 | "flex_bg meta info!"); | |
772cb7c8 JS |
3751 | goto failed_mount2; |
3752 | } | |
3753 | ||
ac27a0ec DK |
3754 | sbi->s_gdb_count = db_count; |
3755 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3756 | spin_lock_init(&sbi->s_next_gen_lock); | |
3757 | ||
04496411 TM |
3758 | init_timer(&sbi->s_err_report); |
3759 | sbi->s_err_report.function = print_daily_error_info; | |
3760 | sbi->s_err_report.data = (unsigned long) sb; | |
3761 | ||
57042651 | 3762 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3763 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3764 | if (!err) { |
3765 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3766 | ext4_count_free_inodes(sb)); | |
3767 | } | |
3768 | if (!err) { | |
3769 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3770 | ext4_count_dirs(sb)); | |
3771 | } | |
3772 | if (!err) { | |
57042651 | 3773 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a TT |
3774 | } |
3775 | if (err) { | |
3776 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
2cde417d | 3777 | ret = err; |
ce7e010a TT |
3778 | goto failed_mount3; |
3779 | } | |
3780 | ||
c9de560d | 3781 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3782 | sbi->s_max_writeback_mb_bump = 128; |
67a5da56 | 3783 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3784 | |
ac27a0ec DK |
3785 | /* |
3786 | * set up enough so that it can read an inode | |
3787 | */ | |
9ca92389 TT |
3788 | if (!test_opt(sb, NOLOAD) && |
3789 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3790 | sb->s_op = &ext4_sops; | |
3791 | else | |
3792 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3793 | sb->s_export_op = &ext4_export_ops; |
3794 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3795 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3796 | sb->s_qcop = &ext4_qctl_operations; |
3797 | sb->dq_op = &ext4_quota_operations; | |
7c319d32 AK |
3798 | |
3799 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
3800 | /* Use qctl operations for hidden quota files. */ | |
3801 | sb->s_qcop = &ext4_qctl_sysfile_operations; | |
3802 | } | |
ac27a0ec | 3803 | #endif |
f2fa2ffc AK |
3804 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3805 | ||
ac27a0ec | 3806 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3807 | mutex_init(&sbi->s_orphan_lock); |
8f82f840 | 3808 | sbi->s_resize_flags = 0; |
ac27a0ec DK |
3809 | |
3810 | sb->s_root = NULL; | |
3811 | ||
3812 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3813 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3814 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3815 | |
c5e06d10 JL |
3816 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3817 | !(sb->s_flags & MS_RDONLY)) | |
3818 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3819 | goto failed_mount3; | |
3820 | ||
ac27a0ec DK |
3821 | /* |
3822 | * The first inode we look at is the journal inode. Don't try | |
3823 | * root first: it may be modified in the journal! | |
3824 | */ | |
3825 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3826 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3827 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3828 | goto failed_mount3; |
0390131b FM |
3829 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3830 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3831 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3832 | "suppressed and not mounted read-only"); | |
744692dc | 3833 | goto failed_mount_wq; |
ac27a0ec | 3834 | } else { |
fd8c37ec | 3835 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3836 | sbi->s_journal = NULL; |
3837 | needs_recovery = 0; | |
3838 | goto no_journal; | |
ac27a0ec DK |
3839 | } |
3840 | ||
f32aaf2d | 3841 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
eb40a09c JS |
3842 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3843 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3844 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3845 | goto failed_mount_wq; |
eb40a09c JS |
3846 | } |
3847 | ||
25ed6e8a DW |
3848 | if (!set_journal_csum_feature_set(sb)) { |
3849 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3850 | "feature set"); | |
3851 | goto failed_mount_wq; | |
d4da6c9c | 3852 | } |
818d276c | 3853 | |
ac27a0ec DK |
3854 | /* We have now updated the journal if required, so we can |
3855 | * validate the data journaling mode. */ | |
3856 | switch (test_opt(sb, DATA_FLAGS)) { | |
3857 | case 0: | |
3858 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3859 | * capabilities: ORDERED_DATA if the journal can |
3860 | * cope, else JOURNAL_DATA | |
3861 | */ | |
dab291af MC |
3862 | if (jbd2_journal_check_available_features |
3863 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3864 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3865 | else |
fd8c37ec | 3866 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3867 | break; |
3868 | ||
617ba13b MC |
3869 | case EXT4_MOUNT_ORDERED_DATA: |
3870 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3871 | if (!jbd2_journal_check_available_features |
3872 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3873 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3874 | "requested data journaling mode"); | |
744692dc | 3875 | goto failed_mount_wq; |
ac27a0ec DK |
3876 | } |
3877 | default: | |
3878 | break; | |
3879 | } | |
b3881f74 | 3880 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3881 | |
18aadd47 BJ |
3882 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3883 | ||
ce7e010a TT |
3884 | /* |
3885 | * The journal may have updated the bg summary counts, so we | |
3886 | * need to update the global counters. | |
3887 | */ | |
57042651 | 3888 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3889 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3890 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3891 | ext4_count_free_inodes(sb)); | |
3892 | percpu_counter_set(&sbi->s_dirs_counter, | |
3893 | ext4_count_dirs(sb)); | |
57042651 | 3894 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3895 | |
ce7e010a | 3896 | no_journal: |
952fc18e TT |
3897 | /* |
3898 | * Get the # of file system overhead blocks from the | |
3899 | * superblock if present. | |
3900 | */ | |
3901 | if (es->s_overhead_clusters) | |
3902 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3903 | else { | |
3904 | ret = ext4_calculate_overhead(sb); | |
3905 | if (ret) | |
3906 | goto failed_mount_wq; | |
3907 | } | |
3908 | ||
fd89d5f2 TH |
3909 | /* |
3910 | * The maximum number of concurrent works can be high and | |
3911 | * concurrency isn't really necessary. Limit it to 1. | |
3912 | */ | |
3913 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3914 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3915 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3916 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3917 | goto failed_mount_wq; | |
3918 | } | |
3919 | ||
ac27a0ec | 3920 | /* |
dab291af | 3921 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3922 | * so we can safely mount the rest of the filesystem now. |
3923 | */ | |
3924 | ||
1d1fe1ee DH |
3925 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3926 | if (IS_ERR(root)) { | |
b31e1552 | 3927 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3928 | ret = PTR_ERR(root); |
32a9bb57 | 3929 | root = NULL; |
ac27a0ec DK |
3930 | goto failed_mount4; |
3931 | } | |
3932 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3933 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3934 | iput(root); |
ac27a0ec DK |
3935 | goto failed_mount4; |
3936 | } | |
48fde701 | 3937 | sb->s_root = d_make_root(root); |
1d1fe1ee | 3938 | if (!sb->s_root) { |
b31e1552 | 3939 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3940 | ret = -ENOMEM; |
3941 | goto failed_mount4; | |
3942 | } | |
ac27a0ec | 3943 | |
7e84b621 ES |
3944 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
3945 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
3946 | |
3947 | /* determine the minimum size of new large inodes, if present */ | |
3948 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3949 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3950 | EXT4_GOOD_OLD_INODE_SIZE; | |
3951 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3952 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3953 | if (sbi->s_want_extra_isize < | |
3954 | le16_to_cpu(es->s_want_extra_isize)) | |
3955 | sbi->s_want_extra_isize = | |
3956 | le16_to_cpu(es->s_want_extra_isize); | |
3957 | if (sbi->s_want_extra_isize < | |
3958 | le16_to_cpu(es->s_min_extra_isize)) | |
3959 | sbi->s_want_extra_isize = | |
3960 | le16_to_cpu(es->s_min_extra_isize); | |
3961 | } | |
3962 | } | |
3963 | /* Check if enough inode space is available */ | |
3964 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3965 | sbi->s_inode_size) { | |
3966 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3967 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3968 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3969 | "available"); | |
ef7f3835 KS |
3970 | } |
3971 | ||
6fd058f7 TT |
3972 | err = ext4_setup_system_zone(sb); |
3973 | if (err) { | |
b31e1552 | 3974 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3975 | "zone (%d)", err); |
94bf608a | 3976 | goto failed_mount4a; |
6fd058f7 TT |
3977 | } |
3978 | ||
c2774d84 | 3979 | ext4_ext_init(sb); |
9d99012f | 3980 | err = ext4_mb_init(sb); |
c2774d84 | 3981 | if (err) { |
421f91d2 | 3982 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3983 | err); |
dcf2d804 | 3984 | goto failed_mount5; |
c2774d84 AK |
3985 | } |
3986 | ||
bfff6873 LC |
3987 | err = ext4_register_li_request(sb, first_not_zeroed); |
3988 | if (err) | |
dcf2d804 | 3989 | goto failed_mount6; |
bfff6873 | 3990 | |
3197ebdb TT |
3991 | sbi->s_kobj.kset = ext4_kset; |
3992 | init_completion(&sbi->s_kobj_unregister); | |
3993 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3994 | "%s", sb->s_id); | |
dcf2d804 TM |
3995 | if (err) |
3996 | goto failed_mount7; | |
3197ebdb | 3997 | |
617ba13b MC |
3998 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3999 | ext4_orphan_cleanup(sb, es); | |
4000 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4001 | if (needs_recovery) { |
b31e1552 | 4002 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4003 | ext4_mark_recovery_complete(sb, es); |
4004 | } | |
4005 | if (EXT4_SB(sb)->s_journal) { | |
4006 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4007 | descr = " journalled data mode"; | |
4008 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4009 | descr = " ordered data mode"; | |
4010 | else | |
4011 | descr = " writeback data mode"; | |
4012 | } else | |
4013 | descr = "out journal"; | |
4014 | ||
7c319d32 AK |
4015 | #ifdef CONFIG_QUOTA |
4016 | /* Enable quota usage during mount. */ | |
4017 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
4018 | !(sb->s_flags & MS_RDONLY)) { | |
4019 | ret = ext4_enable_quotas(sb); | |
4020 | if (ret) | |
4021 | goto failed_mount7; | |
4022 | } | |
4023 | #endif /* CONFIG_QUOTA */ | |
4024 | ||
d4c402d9 | 4025 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
4026 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
4027 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4028 | |
66e61a9e TT |
4029 | if (es->s_error_count) |
4030 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4031 | |
d4c402d9 | 4032 | kfree(orig_data); |
ac27a0ec DK |
4033 | return 0; |
4034 | ||
617ba13b | 4035 | cantfind_ext4: |
ac27a0ec | 4036 | if (!silent) |
b31e1552 | 4037 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4038 | goto failed_mount; |
4039 | ||
dcf2d804 TM |
4040 | failed_mount7: |
4041 | ext4_unregister_li_request(sb); | |
4042 | failed_mount6: | |
dcf2d804 | 4043 | ext4_mb_release(sb); |
94bf608a AV |
4044 | failed_mount5: |
4045 | ext4_ext_release(sb); | |
dcf2d804 | 4046 | ext4_release_system_zone(sb); |
94bf608a AV |
4047 | failed_mount4a: |
4048 | dput(sb->s_root); | |
32a9bb57 | 4049 | sb->s_root = NULL; |
94bf608a | 4050 | failed_mount4: |
b31e1552 | 4051 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
4052 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
4053 | failed_mount_wq: | |
0390131b FM |
4054 | if (sbi->s_journal) { |
4055 | jbd2_journal_destroy(sbi->s_journal); | |
4056 | sbi->s_journal = NULL; | |
4057 | } | |
ac27a0ec | 4058 | failed_mount3: |
04496411 | 4059 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
4060 | if (sbi->s_flex_groups) |
4061 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 4062 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
4063 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
4064 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 4065 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c5e06d10 JL |
4066 | if (sbi->s_mmp_tsk) |
4067 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4068 | failed_mount2: |
4069 | for (i = 0; i < db_count; i++) | |
4070 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 4071 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 4072 | failed_mount: |
0441984a DW |
4073 | if (sbi->s_chksum_driver) |
4074 | crypto_free_shash(sbi->s_chksum_driver); | |
240799cd | 4075 | if (sbi->s_proc) { |
66acdcf4 | 4076 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 4077 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 4078 | } |
ac27a0ec DK |
4079 | #ifdef CONFIG_QUOTA |
4080 | for (i = 0; i < MAXQUOTAS; i++) | |
4081 | kfree(sbi->s_qf_names[i]); | |
4082 | #endif | |
617ba13b | 4083 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4084 | brelse(bh); |
4085 | out_fail: | |
4086 | sb->s_fs_info = NULL; | |
f6830165 | 4087 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4088 | kfree(sbi); |
dcc7dae3 | 4089 | out_free_orig: |
d4c402d9 | 4090 | kfree(orig_data); |
1d1fe1ee | 4091 | return ret; |
ac27a0ec DK |
4092 | } |
4093 | ||
4094 | /* | |
4095 | * Setup any per-fs journal parameters now. We'll do this both on | |
4096 | * initial mount, once the journal has been initialised but before we've | |
4097 | * done any recovery; and again on any subsequent remount. | |
4098 | */ | |
617ba13b | 4099 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4100 | { |
617ba13b | 4101 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4102 | |
30773840 TT |
4103 | journal->j_commit_interval = sbi->s_commit_interval; |
4104 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4105 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4106 | |
a931da6a | 4107 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4108 | if (test_opt(sb, BARRIER)) |
dab291af | 4109 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4110 | else |
dab291af | 4111 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4112 | if (test_opt(sb, DATA_ERR_ABORT)) |
4113 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4114 | else | |
4115 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4116 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4117 | } |
4118 | ||
617ba13b | 4119 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4120 | unsigned int journal_inum) |
4121 | { | |
4122 | struct inode *journal_inode; | |
4123 | journal_t *journal; | |
4124 | ||
0390131b FM |
4125 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4126 | ||
ac27a0ec DK |
4127 | /* First, test for the existence of a valid inode on disk. Bad |
4128 | * things happen if we iget() an unused inode, as the subsequent | |
4129 | * iput() will try to delete it. */ | |
4130 | ||
1d1fe1ee DH |
4131 | journal_inode = ext4_iget(sb, journal_inum); |
4132 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4133 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4134 | return NULL; |
4135 | } | |
4136 | if (!journal_inode->i_nlink) { | |
4137 | make_bad_inode(journal_inode); | |
4138 | iput(journal_inode); | |
b31e1552 | 4139 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4140 | return NULL; |
4141 | } | |
4142 | ||
e5f8eab8 | 4143 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4144 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4145 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4146 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4147 | iput(journal_inode); |
4148 | return NULL; | |
4149 | } | |
4150 | ||
dab291af | 4151 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4152 | if (!journal) { |
b31e1552 | 4153 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4154 | iput(journal_inode); |
4155 | return NULL; | |
4156 | } | |
4157 | journal->j_private = sb; | |
617ba13b | 4158 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4159 | return journal; |
4160 | } | |
4161 | ||
617ba13b | 4162 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4163 | dev_t j_dev) |
4164 | { | |
2b2d6d01 | 4165 | struct buffer_head *bh; |
ac27a0ec | 4166 | journal_t *journal; |
617ba13b MC |
4167 | ext4_fsblk_t start; |
4168 | ext4_fsblk_t len; | |
ac27a0ec | 4169 | int hblock, blocksize; |
617ba13b | 4170 | ext4_fsblk_t sb_block; |
ac27a0ec | 4171 | unsigned long offset; |
2b2d6d01 | 4172 | struct ext4_super_block *es; |
ac27a0ec DK |
4173 | struct block_device *bdev; |
4174 | ||
0390131b FM |
4175 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4176 | ||
b31e1552 | 4177 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4178 | if (bdev == NULL) |
4179 | return NULL; | |
4180 | ||
ac27a0ec | 4181 | blocksize = sb->s_blocksize; |
e1defc4f | 4182 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4183 | if (blocksize < hblock) { |
b31e1552 ES |
4184 | ext4_msg(sb, KERN_ERR, |
4185 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4186 | goto out_bdev; |
4187 | } | |
4188 | ||
617ba13b MC |
4189 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4190 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4191 | set_blocksize(bdev, blocksize); |
4192 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4193 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4194 | "external journal"); | |
ac27a0ec DK |
4195 | goto out_bdev; |
4196 | } | |
4197 | ||
2716b802 | 4198 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4199 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4200 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4201 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4202 | ext4_msg(sb, KERN_ERR, "external journal has " |
4203 | "bad superblock"); | |
ac27a0ec DK |
4204 | brelse(bh); |
4205 | goto out_bdev; | |
4206 | } | |
4207 | ||
617ba13b | 4208 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4209 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4210 | brelse(bh); |
4211 | goto out_bdev; | |
4212 | } | |
4213 | ||
bd81d8ee | 4214 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4215 | start = sb_block + 1; |
4216 | brelse(bh); /* we're done with the superblock */ | |
4217 | ||
dab291af | 4218 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4219 | start, len, blocksize); |
4220 | if (!journal) { | |
b31e1552 | 4221 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4222 | goto out_bdev; |
4223 | } | |
4224 | journal->j_private = sb; | |
4225 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
4226 | wait_on_buffer(journal->j_sb_buffer); | |
4227 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4228 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4229 | goto out_journal; |
4230 | } | |
4231 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4232 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4233 | "user (unsupported) - %d", | |
ac27a0ec DK |
4234 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4235 | goto out_journal; | |
4236 | } | |
617ba13b MC |
4237 | EXT4_SB(sb)->journal_bdev = bdev; |
4238 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4239 | return journal; |
0b8e58a1 | 4240 | |
ac27a0ec | 4241 | out_journal: |
dab291af | 4242 | jbd2_journal_destroy(journal); |
ac27a0ec | 4243 | out_bdev: |
617ba13b | 4244 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4245 | return NULL; |
4246 | } | |
4247 | ||
617ba13b MC |
4248 | static int ext4_load_journal(struct super_block *sb, |
4249 | struct ext4_super_block *es, | |
ac27a0ec DK |
4250 | unsigned long journal_devnum) |
4251 | { | |
4252 | journal_t *journal; | |
4253 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4254 | dev_t journal_dev; | |
4255 | int err = 0; | |
4256 | int really_read_only; | |
4257 | ||
0390131b FM |
4258 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4259 | ||
ac27a0ec DK |
4260 | if (journal_devnum && |
4261 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4262 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4263 | "numbers have changed"); | |
ac27a0ec DK |
4264 | journal_dev = new_decode_dev(journal_devnum); |
4265 | } else | |
4266 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4267 | ||
4268 | really_read_only = bdev_read_only(sb->s_bdev); | |
4269 | ||
4270 | /* | |
4271 | * Are we loading a blank journal or performing recovery after a | |
4272 | * crash? For recovery, we need to check in advance whether we | |
4273 | * can get read-write access to the device. | |
4274 | */ | |
617ba13b | 4275 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4276 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4277 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4278 | "required on readonly filesystem"); | |
ac27a0ec | 4279 | if (really_read_only) { |
b31e1552 ES |
4280 | ext4_msg(sb, KERN_ERR, "write access " |
4281 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4282 | return -EROFS; |
4283 | } | |
b31e1552 ES |
4284 | ext4_msg(sb, KERN_INFO, "write access will " |
4285 | "be enabled during recovery"); | |
ac27a0ec DK |
4286 | } |
4287 | } | |
4288 | ||
4289 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4290 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4291 | "and inode journals!"); | |
ac27a0ec DK |
4292 | return -EINVAL; |
4293 | } | |
4294 | ||
4295 | if (journal_inum) { | |
617ba13b | 4296 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4297 | return -EINVAL; |
4298 | } else { | |
617ba13b | 4299 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4300 | return -EINVAL; |
4301 | } | |
4302 | ||
90576c0b | 4303 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4304 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4305 | |
617ba13b | 4306 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4307 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4308 | if (!err) { |
4309 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4310 | if (save) | |
4311 | memcpy(save, ((char *) es) + | |
4312 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4313 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4314 | if (save) |
4315 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4316 | save, EXT4_S_ERR_LEN); | |
4317 | kfree(save); | |
4318 | } | |
ac27a0ec DK |
4319 | |
4320 | if (err) { | |
b31e1552 | 4321 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4322 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4323 | return err; |
4324 | } | |
4325 | ||
617ba13b MC |
4326 | EXT4_SB(sb)->s_journal = journal; |
4327 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4328 | |
c41303ce | 4329 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4330 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4331 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4332 | |
4333 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4334 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4335 | } |
4336 | ||
4337 | return 0; | |
4338 | } | |
4339 | ||
e2d67052 | 4340 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4341 | { |
e2d67052 | 4342 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4343 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4344 | int error = 0; |
ac27a0ec | 4345 | |
7c2e7087 | 4346 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4347 | return error; |
914258bf TT |
4348 | if (buffer_write_io_error(sbh)) { |
4349 | /* | |
4350 | * Oh, dear. A previous attempt to write the | |
4351 | * superblock failed. This could happen because the | |
4352 | * USB device was yanked out. Or it could happen to | |
4353 | * be a transient write error and maybe the block will | |
4354 | * be remapped. Nothing we can do but to retry the | |
4355 | * write and hope for the best. | |
4356 | */ | |
b31e1552 ES |
4357 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4358 | "superblock detected"); | |
914258bf TT |
4359 | clear_buffer_write_io_error(sbh); |
4360 | set_buffer_uptodate(sbh); | |
4361 | } | |
71290b36 TT |
4362 | /* |
4363 | * If the file system is mounted read-only, don't update the | |
4364 | * superblock write time. This avoids updating the superblock | |
4365 | * write time when we are mounting the root file system | |
4366 | * read/only but we need to replay the journal; at that point, | |
4367 | * for people who are east of GMT and who make their clock | |
4368 | * tick in localtime for Windows bug-for-bug compatibility, | |
4369 | * the clock is set in the future, and this will cause e2fsck | |
4370 | * to complain and force a full file system check. | |
4371 | */ | |
4372 | if (!(sb->s_flags & MS_RDONLY)) | |
4373 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4374 | if (sb->s_bdev->bd_part) |
4375 | es->s_kbytes_written = | |
4376 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4377 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4378 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4379 | else |
4380 | es->s_kbytes_written = | |
4381 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4382 | ext4_free_blocks_count_set(es, |
4383 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4384 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4385 | es->s_free_inodes_count = |
4386 | cpu_to_le32(percpu_counter_sum_positive( | |
4387 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
ac27a0ec | 4388 | BUFFER_TRACE(sbh, "marking dirty"); |
a9c47317 | 4389 | ext4_superblock_csum_set(sb, es); |
ac27a0ec | 4390 | mark_buffer_dirty(sbh); |
914258bf | 4391 | if (sync) { |
c4be0c1d TS |
4392 | error = sync_dirty_buffer(sbh); |
4393 | if (error) | |
4394 | return error; | |
4395 | ||
4396 | error = buffer_write_io_error(sbh); | |
4397 | if (error) { | |
b31e1552 ES |
4398 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4399 | "superblock"); | |
914258bf TT |
4400 | clear_buffer_write_io_error(sbh); |
4401 | set_buffer_uptodate(sbh); | |
4402 | } | |
4403 | } | |
c4be0c1d | 4404 | return error; |
ac27a0ec DK |
4405 | } |
4406 | ||
ac27a0ec DK |
4407 | /* |
4408 | * Have we just finished recovery? If so, and if we are mounting (or | |
4409 | * remounting) the filesystem readonly, then we will end up with a | |
4410 | * consistent fs on disk. Record that fact. | |
4411 | */ | |
2b2d6d01 TT |
4412 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4413 | struct ext4_super_block *es) | |
ac27a0ec | 4414 | { |
617ba13b | 4415 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4416 | |
0390131b FM |
4417 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4418 | BUG_ON(journal != NULL); | |
4419 | return; | |
4420 | } | |
dab291af | 4421 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4422 | if (jbd2_journal_flush(journal) < 0) |
4423 | goto out; | |
4424 | ||
617ba13b | 4425 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4426 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4427 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4428 | ext4_commit_super(sb, 1); |
ac27a0ec | 4429 | } |
7ffe1ea8 HK |
4430 | |
4431 | out: | |
dab291af | 4432 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4433 | } |
4434 | ||
4435 | /* | |
4436 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4437 | * has recorded an error from a previous lifetime, move that error to the | |
4438 | * main filesystem now. | |
4439 | */ | |
2b2d6d01 TT |
4440 | static void ext4_clear_journal_err(struct super_block *sb, |
4441 | struct ext4_super_block *es) | |
ac27a0ec DK |
4442 | { |
4443 | journal_t *journal; | |
4444 | int j_errno; | |
4445 | const char *errstr; | |
4446 | ||
0390131b FM |
4447 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4448 | ||
617ba13b | 4449 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4450 | |
4451 | /* | |
4452 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4453 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4454 | */ |
4455 | ||
dab291af | 4456 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4457 | if (j_errno) { |
4458 | char nbuf[16]; | |
4459 | ||
617ba13b | 4460 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4461 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4462 | "from previous mount: %s", errstr); |
12062ddd | 4463 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4464 | |
617ba13b MC |
4465 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4466 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4467 | ext4_commit_super(sb, 1); |
ac27a0ec | 4468 | |
dab291af | 4469 | jbd2_journal_clear_err(journal); |
d796c52e | 4470 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4471 | } |
4472 | } | |
4473 | ||
4474 | /* | |
4475 | * Force the running and committing transactions to commit, | |
4476 | * and wait on the commit. | |
4477 | */ | |
617ba13b | 4478 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4479 | { |
4480 | journal_t *journal; | |
0390131b | 4481 | int ret = 0; |
ac27a0ec DK |
4482 | |
4483 | if (sb->s_flags & MS_RDONLY) | |
4484 | return 0; | |
4485 | ||
617ba13b | 4486 | journal = EXT4_SB(sb)->s_journal; |
8e8ad8a5 | 4487 | if (journal) |
0390131b | 4488 | ret = ext4_journal_force_commit(journal); |
0390131b | 4489 | |
ac27a0ec DK |
4490 | return ret; |
4491 | } | |
4492 | ||
617ba13b | 4493 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4494 | { |
14ce0cb4 | 4495 | int ret = 0; |
9eddacf9 | 4496 | tid_t target; |
8d5d02e6 | 4497 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4498 | |
9bffad1e | 4499 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 | 4500 | flush_workqueue(sbi->dio_unwritten_wq); |
a1177825 JK |
4501 | /* |
4502 | * Writeback quota in non-journalled quota case - journalled quota has | |
4503 | * no dirty dquots | |
4504 | */ | |
4505 | dquot_writeback_dquots(sb, -1); | |
8d5d02e6 | 4506 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
9ca92389 | 4507 | if (wait) |
8d5d02e6 | 4508 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4509 | } |
14ce0cb4 | 4510 | return ret; |
ac27a0ec DK |
4511 | } |
4512 | ||
4513 | /* | |
4514 | * LVM calls this function before a (read-only) snapshot is created. This | |
4515 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4516 | * |
4517 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4518 | * state independently. It relies on upper layer to stop all data & metadata |
4519 | * modifications. | |
ac27a0ec | 4520 | */ |
c4be0c1d | 4521 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4522 | { |
c4be0c1d TS |
4523 | int error = 0; |
4524 | journal_t *journal; | |
ac27a0ec | 4525 | |
9ca92389 TT |
4526 | if (sb->s_flags & MS_RDONLY) |
4527 | return 0; | |
ac27a0ec | 4528 | |
9ca92389 | 4529 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4530 | |
9ca92389 TT |
4531 | /* Now we set up the journal barrier. */ |
4532 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4533 | |
9ca92389 TT |
4534 | /* |
4535 | * Don't clear the needs_recovery flag if we failed to flush | |
4536 | * the journal. | |
4537 | */ | |
4538 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4539 | if (error < 0) |
4540 | goto out; | |
9ca92389 TT |
4541 | |
4542 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4543 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4544 | error = ext4_commit_super(sb, 1); | |
6b0310fb | 4545 | out: |
8e8ad8a5 | 4546 | /* we rely on upper layer to stop further updates */ |
6b0310fb ES |
4547 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
4548 | return error; | |
ac27a0ec DK |
4549 | } |
4550 | ||
4551 | /* | |
4552 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4553 | * flag here, even though the filesystem is not technically dirty yet. | |
4554 | */ | |
c4be0c1d | 4555 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4556 | { |
9ca92389 TT |
4557 | if (sb->s_flags & MS_RDONLY) |
4558 | return 0; | |
4559 | ||
9ca92389 TT |
4560 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
4561 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4562 | ext4_commit_super(sb, 1); | |
c4be0c1d | 4563 | return 0; |
ac27a0ec DK |
4564 | } |
4565 | ||
673c6100 TT |
4566 | /* |
4567 | * Structure to save mount options for ext4_remount's benefit | |
4568 | */ | |
4569 | struct ext4_mount_options { | |
4570 | unsigned long s_mount_opt; | |
a2595b8a | 4571 | unsigned long s_mount_opt2; |
08cefc7a EB |
4572 | kuid_t s_resuid; |
4573 | kgid_t s_resgid; | |
673c6100 TT |
4574 | unsigned long s_commit_interval; |
4575 | u32 s_min_batch_time, s_max_batch_time; | |
4576 | #ifdef CONFIG_QUOTA | |
4577 | int s_jquota_fmt; | |
4578 | char *s_qf_names[MAXQUOTAS]; | |
4579 | #endif | |
4580 | }; | |
4581 | ||
2b2d6d01 | 4582 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4583 | { |
2b2d6d01 | 4584 | struct ext4_super_block *es; |
617ba13b | 4585 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4586 | unsigned long old_sb_flags; |
617ba13b | 4587 | struct ext4_mount_options old_opts; |
c79d967d | 4588 | int enable_quota = 0; |
8a266467 | 4589 | ext4_group_t g; |
b3881f74 | 4590 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4591 | int err = 0; |
ac27a0ec DK |
4592 | #ifdef CONFIG_QUOTA |
4593 | int i; | |
4594 | #endif | |
d4c402d9 | 4595 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4596 | |
4597 | /* Store the original options */ | |
4598 | old_sb_flags = sb->s_flags; | |
4599 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4600 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4601 | old_opts.s_resuid = sbi->s_resuid; |
4602 | old_opts.s_resgid = sbi->s_resgid; | |
4603 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4604 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4605 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4606 | #ifdef CONFIG_QUOTA |
4607 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4608 | for (i = 0; i < MAXQUOTAS; i++) | |
4609 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4610 | #endif | |
b3881f74 TT |
4611 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4612 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4613 | |
4614 | /* | |
4615 | * Allow the "check" option to be passed as a remount option. | |
4616 | */ | |
661aa520 | 4617 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4618 | err = -EINVAL; |
4619 | goto restore_opts; | |
4620 | } | |
4621 | ||
4ab2f15b | 4622 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4623 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4624 | |
4625 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4626 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4627 | |
4628 | es = sbi->s_es; | |
4629 | ||
b3881f74 | 4630 | if (sbi->s_journal) { |
0390131b | 4631 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4632 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4633 | } | |
ac27a0ec | 4634 | |
661aa520 | 4635 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4636 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4637 | err = -EROFS; |
4638 | goto restore_opts; | |
4639 | } | |
4640 | ||
4641 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4642 | err = dquot_suspend(sb, -1); |
4643 | if (err < 0) | |
c79d967d | 4644 | goto restore_opts; |
c79d967d | 4645 | |
ac27a0ec DK |
4646 | /* |
4647 | * First of all, the unconditional stuff we have to do | |
4648 | * to disable replay of the journal when we next remount | |
4649 | */ | |
4650 | sb->s_flags |= MS_RDONLY; | |
4651 | ||
4652 | /* | |
4653 | * OK, test if we are remounting a valid rw partition | |
4654 | * readonly, and if so set the rdonly flag and then | |
4655 | * mark the partition as valid again. | |
4656 | */ | |
617ba13b MC |
4657 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4658 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4659 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4660 | ||
a63c9eb2 | 4661 | if (sbi->s_journal) |
0390131b | 4662 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4663 | } else { |
a13fb1a4 ES |
4664 | /* Make sure we can mount this feature set readwrite */ |
4665 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4666 | err = -EROFS; |
4667 | goto restore_opts; | |
4668 | } | |
8a266467 TT |
4669 | /* |
4670 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4671 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4672 | */ |
4673 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4674 | struct ext4_group_desc *gdp = | |
4675 | ext4_get_group_desc(sb, g, NULL); | |
4676 | ||
feb0ab32 | 4677 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4678 | ext4_msg(sb, KERN_ERR, |
4679 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4680 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4681 | le16_to_cpu(gdp->bg_checksum)); | |
4682 | err = -EINVAL; | |
4683 | goto restore_opts; | |
4684 | } | |
4685 | } | |
4686 | ||
ead6596b ES |
4687 | /* |
4688 | * If we have an unprocessed orphan list hanging | |
4689 | * around from a previously readonly bdev mount, | |
4690 | * require a full umount/remount for now. | |
4691 | */ | |
4692 | if (es->s_last_orphan) { | |
b31e1552 | 4693 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4694 | "remount RDWR because of unprocessed " |
4695 | "orphan inode list. Please " | |
b31e1552 | 4696 | "umount/remount instead"); |
ead6596b ES |
4697 | err = -EINVAL; |
4698 | goto restore_opts; | |
4699 | } | |
4700 | ||
ac27a0ec DK |
4701 | /* |
4702 | * Mounting a RDONLY partition read-write, so reread | |
4703 | * and store the current valid flag. (It may have | |
4704 | * been changed by e2fsck since we originally mounted | |
4705 | * the partition.) | |
4706 | */ | |
0390131b FM |
4707 | if (sbi->s_journal) |
4708 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4709 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4710 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4711 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4712 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4713 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4714 | if (ext4_multi_mount_protect(sb, | |
4715 | le64_to_cpu(es->s_mmp_block))) { | |
4716 | err = -EROFS; | |
4717 | goto restore_opts; | |
4718 | } | |
c79d967d | 4719 | enable_quota = 1; |
ac27a0ec DK |
4720 | } |
4721 | } | |
bfff6873 LC |
4722 | |
4723 | /* | |
4724 | * Reinitialize lazy itable initialization thread based on | |
4725 | * current settings | |
4726 | */ | |
4727 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4728 | ext4_unregister_li_request(sb); | |
4729 | else { | |
4730 | ext4_group_t first_not_zeroed; | |
4731 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4732 | ext4_register_li_request(sb, first_not_zeroed); | |
4733 | } | |
4734 | ||
6fd058f7 | 4735 | ext4_setup_system_zone(sb); |
0390131b | 4736 | if (sbi->s_journal == NULL) |
e2d67052 | 4737 | ext4_commit_super(sb, 1); |
0390131b | 4738 | |
ac27a0ec DK |
4739 | #ifdef CONFIG_QUOTA |
4740 | /* Release old quota file names */ | |
4741 | for (i = 0; i < MAXQUOTAS; i++) | |
4742 | if (old_opts.s_qf_names[i] && | |
4743 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4744 | kfree(old_opts.s_qf_names[i]); | |
7c319d32 AK |
4745 | if (enable_quota) { |
4746 | if (sb_any_quota_suspended(sb)) | |
4747 | dquot_resume(sb, -1); | |
4748 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4749 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
4750 | err = ext4_enable_quotas(sb); | |
07724f98 | 4751 | if (err) |
7c319d32 | 4752 | goto restore_opts; |
7c319d32 AK |
4753 | } |
4754 | } | |
ac27a0ec | 4755 | #endif |
d4c402d9 CW |
4756 | |
4757 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4758 | kfree(orig_data); | |
ac27a0ec | 4759 | return 0; |
0b8e58a1 | 4760 | |
ac27a0ec DK |
4761 | restore_opts: |
4762 | sb->s_flags = old_sb_flags; | |
4763 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4764 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4765 | sbi->s_resuid = old_opts.s_resuid; |
4766 | sbi->s_resgid = old_opts.s_resgid; | |
4767 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4768 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4769 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4770 | #ifdef CONFIG_QUOTA |
4771 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4772 | for (i = 0; i < MAXQUOTAS; i++) { | |
4773 | if (sbi->s_qf_names[i] && | |
4774 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4775 | kfree(sbi->s_qf_names[i]); | |
4776 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4777 | } | |
4778 | #endif | |
d4c402d9 | 4779 | kfree(orig_data); |
ac27a0ec DK |
4780 | return err; |
4781 | } | |
4782 | ||
2b2d6d01 | 4783 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4784 | { |
4785 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4786 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4787 | struct ext4_super_block *es = sbi->s_es; | |
952fc18e | 4788 | ext4_fsblk_t overhead = 0; |
960cc398 | 4789 | u64 fsid; |
d02a9391 | 4790 | s64 bfree; |
ac27a0ec | 4791 | |
952fc18e TT |
4792 | if (!test_opt(sb, MINIX_DF)) |
4793 | overhead = sbi->s_overhead; | |
ac27a0ec | 4794 | |
617ba13b | 4795 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4796 | buf->f_bsize = sb->s_blocksize; |
952fc18e | 4797 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); |
57042651 TT |
4798 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4799 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4800 | /* prevent underflow in case that few free space is available */ |
57042651 | 4801 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
bd81d8ee LV |
4802 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4803 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4804 | buf->f_bavail = 0; |
4805 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4806 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4807 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4808 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4809 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4810 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4811 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4812 | |
ac27a0ec DK |
4813 | return 0; |
4814 | } | |
4815 | ||
0b8e58a1 AD |
4816 | /* Helper function for writing quotas on sync - we need to start transaction |
4817 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4818 | * Process 1 Process 2 |
617ba13b | 4819 | * ext4_create() quota_sync() |
a269eb18 | 4820 | * jbd2_journal_start() write_dquot() |
871a2931 | 4821 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4822 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4823 | * |
4824 | */ | |
4825 | ||
4826 | #ifdef CONFIG_QUOTA | |
4827 | ||
4828 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4829 | { | |
4830 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4831 | } | |
4832 | ||
617ba13b | 4833 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4834 | { |
4835 | int ret, err; | |
4836 | handle_t *handle; | |
4837 | struct inode *inode; | |
4838 | ||
4839 | inode = dquot_to_inode(dquot); | |
617ba13b | 4840 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4841 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4842 | if (IS_ERR(handle)) |
4843 | return PTR_ERR(handle); | |
4844 | ret = dquot_commit(dquot); | |
617ba13b | 4845 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4846 | if (!ret) |
4847 | ret = err; | |
4848 | return ret; | |
4849 | } | |
4850 | ||
617ba13b | 4851 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4852 | { |
4853 | int ret, err; | |
4854 | handle_t *handle; | |
4855 | ||
617ba13b | 4856 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4857 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4858 | if (IS_ERR(handle)) |
4859 | return PTR_ERR(handle); | |
4860 | ret = dquot_acquire(dquot); | |
617ba13b | 4861 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4862 | if (!ret) |
4863 | ret = err; | |
4864 | return ret; | |
4865 | } | |
4866 | ||
617ba13b | 4867 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4868 | { |
4869 | int ret, err; | |
4870 | handle_t *handle; | |
4871 | ||
617ba13b | 4872 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4873 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4874 | if (IS_ERR(handle)) { |
4875 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4876 | dquot_release(dquot); | |
ac27a0ec | 4877 | return PTR_ERR(handle); |
9c3013e9 | 4878 | } |
ac27a0ec | 4879 | ret = dquot_release(dquot); |
617ba13b | 4880 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4881 | if (!ret) |
4882 | ret = err; | |
4883 | return ret; | |
4884 | } | |
4885 | ||
617ba13b | 4886 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4887 | { |
2c8be6b2 | 4888 | /* Are we journaling quotas? */ |
617ba13b MC |
4889 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4890 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4891 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4892 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4893 | } else { |
4894 | return dquot_mark_dquot_dirty(dquot); | |
4895 | } | |
4896 | } | |
4897 | ||
617ba13b | 4898 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4899 | { |
4900 | int ret, err; | |
4901 | handle_t *handle; | |
4902 | ||
4903 | /* Data block + inode block */ | |
617ba13b | 4904 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4905 | if (IS_ERR(handle)) |
4906 | return PTR_ERR(handle); | |
4907 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4908 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4909 | if (!ret) |
4910 | ret = err; | |
4911 | return ret; | |
4912 | } | |
4913 | ||
4914 | /* | |
4915 | * Turn on quotas during mount time - we need to find | |
4916 | * the quota file and such... | |
4917 | */ | |
617ba13b | 4918 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4919 | { |
287a8095 CH |
4920 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4921 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4922 | } |
4923 | ||
4924 | /* | |
4925 | * Standard function to be called on quota_on | |
4926 | */ | |
617ba13b | 4927 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4928 | struct path *path) |
ac27a0ec DK |
4929 | { |
4930 | int err; | |
ac27a0ec DK |
4931 | |
4932 | if (!test_opt(sb, QUOTA)) | |
4933 | return -EINVAL; | |
0623543b | 4934 | |
ac27a0ec | 4935 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 4936 | if (path->dentry->d_sb != sb) |
ac27a0ec | 4937 | return -EXDEV; |
0623543b JK |
4938 | /* Journaling quota? */ |
4939 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4940 | /* Quotafile not in fs root? */ |
f00c9e44 | 4941 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4942 | ext4_msg(sb, KERN_WARNING, |
4943 | "Quota file not on filesystem root. " | |
4944 | "Journaled quota will not work"); | |
2b2d6d01 | 4945 | } |
0623543b JK |
4946 | |
4947 | /* | |
4948 | * When we journal data on quota file, we have to flush journal to see | |
4949 | * all updates to the file when we bypass pagecache... | |
4950 | */ | |
0390131b | 4951 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4952 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4953 | /* |
4954 | * We don't need to lock updates but journal_flush() could | |
4955 | * otherwise be livelocked... | |
4956 | */ | |
4957 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4958 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4959 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4960 | if (err) |
7ffe1ea8 | 4961 | return err; |
0623543b JK |
4962 | } |
4963 | ||
f00c9e44 | 4964 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4965 | } |
4966 | ||
7c319d32 AK |
4967 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
4968 | unsigned int flags) | |
4969 | { | |
4970 | int err; | |
4971 | struct inode *qf_inode; | |
4972 | unsigned long qf_inums[MAXQUOTAS] = { | |
4973 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
4974 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
4975 | }; | |
4976 | ||
4977 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); | |
4978 | ||
4979 | if (!qf_inums[type]) | |
4980 | return -EPERM; | |
4981 | ||
4982 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
4983 | if (IS_ERR(qf_inode)) { | |
4984 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
4985 | return PTR_ERR(qf_inode); | |
4986 | } | |
4987 | ||
4988 | err = dquot_enable(qf_inode, type, format_id, flags); | |
4989 | iput(qf_inode); | |
4990 | ||
4991 | return err; | |
4992 | } | |
4993 | ||
4994 | /* Enable usage tracking for all quota types. */ | |
4995 | static int ext4_enable_quotas(struct super_block *sb) | |
4996 | { | |
4997 | int type, err = 0; | |
4998 | unsigned long qf_inums[MAXQUOTAS] = { | |
4999 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
5000 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5001 | }; | |
5002 | ||
5003 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
5004 | for (type = 0; type < MAXQUOTAS; type++) { | |
5005 | if (qf_inums[type]) { | |
5006 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5007 | DQUOT_USAGE_ENABLED); | |
5008 | if (err) { | |
5009 | ext4_warning(sb, | |
5010 | "Failed to enable quota (type=%d) " | |
5011 | "tracking. Please run e2fsck to fix.", | |
5012 | type); | |
5013 | return err; | |
5014 | } | |
5015 | } | |
5016 | } | |
5017 | return 0; | |
5018 | } | |
5019 | ||
5020 | /* | |
5021 | * quota_on function that is used when QUOTA feature is set. | |
5022 | */ | |
5023 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, | |
5024 | int format_id) | |
5025 | { | |
5026 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5027 | return -EINVAL; | |
5028 | ||
5029 | /* | |
5030 | * USAGE was enabled at mount time. Only need to enable LIMITS now. | |
5031 | */ | |
5032 | return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); | |
5033 | } | |
5034 | ||
ca0e05e4 DM |
5035 | static int ext4_quota_off(struct super_block *sb, int type) |
5036 | { | |
21f97697 JK |
5037 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5038 | handle_t *handle; | |
5039 | ||
87009d86 DM |
5040 | /* Force all delayed allocation blocks to be allocated. |
5041 | * Caller already holds s_umount sem */ | |
5042 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5043 | sync_filesystem(sb); |
ca0e05e4 | 5044 | |
0b268590 AG |
5045 | if (!inode) |
5046 | goto out; | |
5047 | ||
21f97697 JK |
5048 | /* Update modification times of quota files when userspace can |
5049 | * start looking at them */ | |
5050 | handle = ext4_journal_start(inode, 1); | |
5051 | if (IS_ERR(handle)) | |
5052 | goto out; | |
5053 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5054 | ext4_mark_inode_dirty(handle, inode); | |
5055 | ext4_journal_stop(handle); | |
5056 | ||
5057 | out: | |
ca0e05e4 DM |
5058 | return dquot_quota_off(sb, type); |
5059 | } | |
5060 | ||
7c319d32 AK |
5061 | /* |
5062 | * quota_off function that is used when QUOTA feature is set. | |
5063 | */ | |
5064 | static int ext4_quota_off_sysfile(struct super_block *sb, int type) | |
5065 | { | |
5066 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5067 | return -EINVAL; | |
5068 | ||
5069 | /* Disable only the limits. */ | |
5070 | return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); | |
5071 | } | |
5072 | ||
ac27a0ec DK |
5073 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5074 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5075 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5076 | * we don't have to be afraid of races */ |
617ba13b | 5077 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5078 | size_t len, loff_t off) |
5079 | { | |
5080 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5081 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5082 | int err = 0; |
5083 | int offset = off & (sb->s_blocksize - 1); | |
5084 | int tocopy; | |
5085 | size_t toread; | |
5086 | struct buffer_head *bh; | |
5087 | loff_t i_size = i_size_read(inode); | |
5088 | ||
5089 | if (off > i_size) | |
5090 | return 0; | |
5091 | if (off+len > i_size) | |
5092 | len = i_size-off; | |
5093 | toread = len; | |
5094 | while (toread > 0) { | |
5095 | tocopy = sb->s_blocksize - offset < toread ? | |
5096 | sb->s_blocksize - offset : toread; | |
617ba13b | 5097 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
5098 | if (err) |
5099 | return err; | |
5100 | if (!bh) /* A hole? */ | |
5101 | memset(data, 0, tocopy); | |
5102 | else | |
5103 | memcpy(data, bh->b_data+offset, tocopy); | |
5104 | brelse(bh); | |
5105 | offset = 0; | |
5106 | toread -= tocopy; | |
5107 | data += tocopy; | |
5108 | blk++; | |
5109 | } | |
5110 | return len; | |
5111 | } | |
5112 | ||
5113 | /* Write to quotafile (we know the transaction is already started and has | |
5114 | * enough credits) */ | |
617ba13b | 5115 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5116 | const char *data, size_t len, loff_t off) |
5117 | { | |
5118 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5119 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5120 | int err = 0; |
5121 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
5122 | struct buffer_head *bh; |
5123 | handle_t *handle = journal_current_handle(); | |
5124 | ||
0390131b | 5125 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5126 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5127 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5128 | (unsigned long long)off, (unsigned long long)len); |
5129 | return -EIO; | |
5130 | } | |
67eeb568 DM |
5131 | /* |
5132 | * Since we account only one data block in transaction credits, | |
5133 | * then it is impossible to cross a block boundary. | |
5134 | */ | |
5135 | if (sb->s_blocksize - offset < len) { | |
5136 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5137 | " cancelled because not block aligned", | |
5138 | (unsigned long long)off, (unsigned long long)len); | |
5139 | return -EIO; | |
5140 | } | |
5141 | ||
67eeb568 DM |
5142 | bh = ext4_bread(handle, inode, blk, 1, &err); |
5143 | if (!bh) | |
5144 | goto out; | |
62d2b5f2 JK |
5145 | err = ext4_journal_get_write_access(handle, bh); |
5146 | if (err) { | |
5147 | brelse(bh); | |
5148 | goto out; | |
ac27a0ec | 5149 | } |
67eeb568 DM |
5150 | lock_buffer(bh); |
5151 | memcpy(bh->b_data+offset, data, len); | |
5152 | flush_dcache_page(bh->b_page); | |
5153 | unlock_buffer(bh); | |
62d2b5f2 | 5154 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5155 | brelse(bh); |
ac27a0ec | 5156 | out: |
0b7f7cef | 5157 | if (err) |
ac27a0ec | 5158 | return err; |
67eeb568 DM |
5159 | if (inode->i_size < off + len) { |
5160 | i_size_write(inode, off + len); | |
617ba13b | 5161 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5162 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5163 | } |
67eeb568 | 5164 | return len; |
ac27a0ec DK |
5165 | } |
5166 | ||
5167 | #endif | |
5168 | ||
152a0836 AV |
5169 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5170 | const char *dev_name, void *data) | |
ac27a0ec | 5171 | { |
152a0836 | 5172 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5173 | } |
5174 | ||
37f328eb | 5175 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5176 | static inline void register_as_ext2(void) |
5177 | { | |
5178 | int err = register_filesystem(&ext2_fs_type); | |
5179 | if (err) | |
5180 | printk(KERN_WARNING | |
5181 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5182 | } | |
5183 | ||
5184 | static inline void unregister_as_ext2(void) | |
5185 | { | |
5186 | unregister_filesystem(&ext2_fs_type); | |
5187 | } | |
2035e776 TT |
5188 | |
5189 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5190 | { | |
5191 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
5192 | return 0; | |
5193 | if (sb->s_flags & MS_RDONLY) | |
5194 | return 1; | |
5195 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
5196 | return 0; | |
5197 | return 1; | |
5198 | } | |
51b7e3c9 | 5199 | MODULE_ALIAS("ext2"); |
24b58424 TT |
5200 | #else |
5201 | static inline void register_as_ext2(void) { } | |
5202 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5203 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5204 | #endif |
5205 | ||
37f328eb | 5206 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5207 | static inline void register_as_ext3(void) |
5208 | { | |
5209 | int err = register_filesystem(&ext3_fs_type); | |
5210 | if (err) | |
5211 | printk(KERN_WARNING | |
5212 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5213 | } | |
5214 | ||
5215 | static inline void unregister_as_ext3(void) | |
5216 | { | |
5217 | unregister_filesystem(&ext3_fs_type); | |
5218 | } | |
2035e776 TT |
5219 | |
5220 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5221 | { | |
5222 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
5223 | return 0; | |
5224 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
5225 | return 0; | |
5226 | if (sb->s_flags & MS_RDONLY) | |
5227 | return 1; | |
5228 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5229 | return 0; | |
5230 | return 1; | |
5231 | } | |
51b7e3c9 | 5232 | MODULE_ALIAS("ext3"); |
24b58424 TT |
5233 | #else |
5234 | static inline void register_as_ext3(void) { } | |
5235 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5236 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5237 | #endif |
5238 | ||
03010a33 TT |
5239 | static struct file_system_type ext4_fs_type = { |
5240 | .owner = THIS_MODULE, | |
5241 | .name = "ext4", | |
152a0836 | 5242 | .mount = ext4_mount, |
03010a33 TT |
5243 | .kill_sb = kill_block_super, |
5244 | .fs_flags = FS_REQUIRES_DEV, | |
5245 | }; | |
5246 | ||
8f021222 | 5247 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5248 | { |
5249 | struct ext4_features *ef; | |
5250 | int ret = -ENOMEM; | |
5251 | ||
5252 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5253 | if (!ef) | |
5254 | goto out; | |
5255 | ||
5256 | ef->f_kobj.kset = ext4_kset; | |
5257 | init_completion(&ef->f_kobj_unregister); | |
5258 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5259 | "features"); | |
5260 | if (ret) { | |
5261 | kfree(ef); | |
5262 | goto out; | |
5263 | } | |
5264 | ||
5265 | ext4_feat = ef; | |
5266 | ret = 0; | |
5267 | out: | |
5268 | return ret; | |
5269 | } | |
5270 | ||
8f021222 LC |
5271 | static void ext4_exit_feat_adverts(void) |
5272 | { | |
5273 | kobject_put(&ext4_feat->f_kobj); | |
5274 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5275 | kfree(ext4_feat); | |
5276 | } | |
5277 | ||
e9e3bcec ES |
5278 | /* Shared across all ext4 file systems */ |
5279 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5280 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5281 | ||
5dabfc78 | 5282 | static int __init ext4_init_fs(void) |
ac27a0ec | 5283 | { |
e9e3bcec | 5284 | int i, err; |
c9de560d | 5285 | |
07c0c5d8 AV |
5286 | ext4_li_info = NULL; |
5287 | mutex_init(&ext4_li_mtx); | |
5288 | ||
12e9b892 | 5289 | ext4_check_flag_values(); |
e9e3bcec ES |
5290 | |
5291 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5292 | mutex_init(&ext4__aio_mutex[i]); | |
5293 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5294 | } | |
5295 | ||
5dabfc78 | 5296 | err = ext4_init_pageio(); |
6fd058f7 TT |
5297 | if (err) |
5298 | return err; | |
5dabfc78 | 5299 | err = ext4_init_system_zone(); |
bd2d0210 | 5300 | if (err) |
d44651d0 | 5301 | goto out6; |
3197ebdb | 5302 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
0e376b1e TT |
5303 | if (!ext4_kset) { |
5304 | err = -ENOMEM; | |
dd68314c | 5305 | goto out5; |
0e376b1e | 5306 | } |
d44651d0 | 5307 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5308 | |
5309 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5310 | if (err) |
5311 | goto out4; | |
857ac889 | 5312 | |
5dabfc78 | 5313 | err = ext4_init_mballoc(); |
ac27a0ec | 5314 | if (err) |
6fd058f7 | 5315 | goto out3; |
c9de560d | 5316 | |
5dabfc78 | 5317 | err = ext4_init_xattr(); |
c9de560d AT |
5318 | if (err) |
5319 | goto out2; | |
ac27a0ec DK |
5320 | err = init_inodecache(); |
5321 | if (err) | |
5322 | goto out1; | |
24b58424 | 5323 | register_as_ext3(); |
2035e776 | 5324 | register_as_ext2(); |
03010a33 | 5325 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5326 | if (err) |
5327 | goto out; | |
bfff6873 | 5328 | |
ac27a0ec DK |
5329 | return 0; |
5330 | out: | |
24b58424 TT |
5331 | unregister_as_ext2(); |
5332 | unregister_as_ext3(); | |
ac27a0ec DK |
5333 | destroy_inodecache(); |
5334 | out1: | |
5dabfc78 | 5335 | ext4_exit_xattr(); |
c9de560d | 5336 | out2: |
5dabfc78 | 5337 | ext4_exit_mballoc(); |
6fd058f7 | 5338 | out3: |
8f021222 | 5339 | ext4_exit_feat_adverts(); |
dd68314c | 5340 | out4: |
d44651d0 FJ |
5341 | if (ext4_proc_root) |
5342 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5343 | kset_unregister(ext4_kset); |
d44651d0 | 5344 | out5: |
5dabfc78 | 5345 | ext4_exit_system_zone(); |
d44651d0 | 5346 | out6: |
5dabfc78 | 5347 | ext4_exit_pageio(); |
ac27a0ec DK |
5348 | return err; |
5349 | } | |
5350 | ||
5dabfc78 | 5351 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5352 | { |
bfff6873 | 5353 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5354 | unregister_as_ext2(); |
5355 | unregister_as_ext3(); | |
03010a33 | 5356 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5357 | destroy_inodecache(); |
5dabfc78 TT |
5358 | ext4_exit_xattr(); |
5359 | ext4_exit_mballoc(); | |
8f021222 | 5360 | ext4_exit_feat_adverts(); |
9f6200bb | 5361 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5362 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5363 | ext4_exit_system_zone(); |
5364 | ext4_exit_pageio(); | |
ac27a0ec DK |
5365 | } |
5366 | ||
5367 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5368 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5369 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5370 | module_init(ext4_init_fs) |
5371 | module_exit(ext4_exit_fs) |