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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 CH |
47 | #include "ext4.h" |
48 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
49 | #include "xattr.h" |
50 | #include "acl.h" | |
3661d286 | 51 | #include "mballoc.h" |
ac27a0ec | 52 | |
9bffad1e TT |
53 | #define CREATE_TRACE_POINTS |
54 | #include <trace/events/ext4.h> | |
55 | ||
1f109d5a | 56 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 57 | static struct kset *ext4_kset; |
0b75a840 LC |
58 | static struct ext4_lazy_init *ext4_li_info; |
59 | static struct mutex ext4_li_mtx; | |
60 | static struct ext4_features *ext4_feat; | |
9f6200bb | 61 | |
617ba13b | 62 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 63 | unsigned long journal_devnum); |
e2d67052 | 64 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
65 | static void ext4_mark_recovery_complete(struct super_block *sb, |
66 | struct ext4_super_block *es); | |
67 | static void ext4_clear_journal_err(struct super_block *sb, | |
68 | struct ext4_super_block *es); | |
617ba13b | 69 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 70 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 71 | char nbuf[16]); |
2b2d6d01 TT |
72 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
73 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 74 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 75 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 76 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
77 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
78 | const char *dev_name, void *data); | |
2035e776 TT |
79 | static inline int ext2_feature_set_ok(struct super_block *sb); |
80 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 81 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
82 | static void ext4_destroy_lazyinit_thread(void); |
83 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 84 | static void ext4_clear_request_list(void); |
ac27a0ec | 85 | |
2035e776 TT |
86 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
87 | static struct file_system_type ext2_fs_type = { | |
88 | .owner = THIS_MODULE, | |
89 | .name = "ext2", | |
90 | .mount = ext4_mount, | |
91 | .kill_sb = kill_block_super, | |
92 | .fs_flags = FS_REQUIRES_DEV, | |
93 | }; | |
94 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) | |
95 | #else | |
96 | #define IS_EXT2_SB(sb) (0) | |
97 | #endif | |
98 | ||
99 | ||
ba69f9ab JK |
100 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
101 | static struct file_system_type ext3_fs_type = { | |
102 | .owner = THIS_MODULE, | |
103 | .name = "ext3", | |
152a0836 | 104 | .mount = ext4_mount, |
ba69f9ab JK |
105 | .kill_sb = kill_block_super, |
106 | .fs_flags = FS_REQUIRES_DEV, | |
107 | }; | |
108 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
109 | #else | |
110 | #define IS_EXT3_SB(sb) (0) | |
111 | #endif | |
bd81d8ee | 112 | |
9933fc0a TT |
113 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
114 | { | |
115 | void *ret; | |
116 | ||
117 | ret = kmalloc(size, flags); | |
118 | if (!ret) | |
119 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
124 | { | |
125 | void *ret; | |
126 | ||
db9481c0 | 127 | ret = kzalloc(size, flags); |
9933fc0a TT |
128 | if (!ret) |
129 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
130 | return ret; | |
131 | } | |
132 | ||
133 | void ext4_kvfree(void *ptr) | |
134 | { | |
135 | if (is_vmalloc_addr(ptr)) | |
136 | vfree(ptr); | |
137 | else | |
138 | kfree(ptr); | |
139 | ||
140 | } | |
141 | ||
8fadc143 AR |
142 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
143 | struct ext4_group_desc *bg) | |
bd81d8ee | 144 | { |
3a14589c | 145 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 146 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 147 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
148 | } |
149 | ||
8fadc143 AR |
150 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
151 | struct ext4_group_desc *bg) | |
bd81d8ee | 152 | { |
5272f837 | 153 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 154 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 155 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
156 | } |
157 | ||
8fadc143 AR |
158 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
159 | struct ext4_group_desc *bg) | |
bd81d8ee | 160 | { |
5272f837 | 161 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 162 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 163 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
164 | } |
165 | ||
560671a0 AK |
166 | __u32 ext4_free_blks_count(struct super_block *sb, |
167 | struct ext4_group_desc *bg) | |
168 | { | |
169 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
170 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 171 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
172 | } |
173 | ||
174 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
175 | struct ext4_group_desc *bg) | |
176 | { | |
177 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
178 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 179 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
180 | } |
181 | ||
182 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
183 | struct ext4_group_desc *bg) | |
184 | { | |
185 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
186 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 187 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
188 | } |
189 | ||
190 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
191 | struct ext4_group_desc *bg) | |
192 | { | |
193 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
194 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 195 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
196 | } |
197 | ||
8fadc143 AR |
198 | void ext4_block_bitmap_set(struct super_block *sb, |
199 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 200 | { |
3a14589c | 201 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
202 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
203 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
204 | } |
205 | ||
8fadc143 AR |
206 | void ext4_inode_bitmap_set(struct super_block *sb, |
207 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 208 | { |
5272f837 | 209 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
210 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
211 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
212 | } |
213 | ||
8fadc143 AR |
214 | void ext4_inode_table_set(struct super_block *sb, |
215 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 216 | { |
5272f837 | 217 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
218 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
219 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
220 | } |
221 | ||
560671a0 AK |
222 | void ext4_free_blks_set(struct super_block *sb, |
223 | struct ext4_group_desc *bg, __u32 count) | |
224 | { | |
225 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
226 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
227 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
228 | } | |
229 | ||
230 | void ext4_free_inodes_set(struct super_block *sb, | |
231 | struct ext4_group_desc *bg, __u32 count) | |
232 | { | |
233 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
234 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
235 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
236 | } | |
237 | ||
238 | void ext4_used_dirs_set(struct super_block *sb, | |
239 | struct ext4_group_desc *bg, __u32 count) | |
240 | { | |
241 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
242 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
243 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
244 | } | |
245 | ||
246 | void ext4_itable_unused_set(struct super_block *sb, | |
247 | struct ext4_group_desc *bg, __u32 count) | |
248 | { | |
249 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
250 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
251 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
252 | } | |
253 | ||
d3d1faf6 CW |
254 | |
255 | /* Just increment the non-pointer handle value */ | |
256 | static handle_t *ext4_get_nojournal(void) | |
257 | { | |
258 | handle_t *handle = current->journal_info; | |
259 | unsigned long ref_cnt = (unsigned long)handle; | |
260 | ||
261 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
262 | ||
263 | ref_cnt++; | |
264 | handle = (handle_t *)ref_cnt; | |
265 | ||
266 | current->journal_info = handle; | |
267 | return handle; | |
268 | } | |
269 | ||
270 | ||
271 | /* Decrement the non-pointer handle value */ | |
272 | static void ext4_put_nojournal(handle_t *handle) | |
273 | { | |
274 | unsigned long ref_cnt = (unsigned long)handle; | |
275 | ||
276 | BUG_ON(ref_cnt == 0); | |
277 | ||
278 | ref_cnt--; | |
279 | handle = (handle_t *)ref_cnt; | |
280 | ||
281 | current->journal_info = handle; | |
282 | } | |
283 | ||
ac27a0ec | 284 | /* |
dab291af | 285 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
286 | * |
287 | * The only special thing we need to do here is to make sure that all | |
288 | * journal_end calls result in the superblock being marked dirty, so | |
289 | * that sync() will call the filesystem's write_super callback if | |
290 | * appropriate. | |
be4f27d3 YY |
291 | * |
292 | * To avoid j_barrier hold in userspace when a user calls freeze(), | |
293 | * ext4 prevents a new handle from being started by s_frozen, which | |
294 | * is in an upper layer. | |
ac27a0ec | 295 | */ |
617ba13b | 296 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
297 | { |
298 | journal_t *journal; | |
be4f27d3 | 299 | handle_t *handle; |
ac27a0ec | 300 | |
12706394 | 301 | trace_ext4_journal_start(sb, nblocks, _RET_IP_); |
ac27a0ec DK |
302 | if (sb->s_flags & MS_RDONLY) |
303 | return ERR_PTR(-EROFS); | |
304 | ||
617ba13b | 305 | journal = EXT4_SB(sb)->s_journal; |
be4f27d3 YY |
306 | handle = ext4_journal_current_handle(); |
307 | ||
308 | /* | |
309 | * If a handle has been started, it should be allowed to | |
310 | * finish, otherwise deadlock could happen between freeze | |
311 | * and others(e.g. truncate) due to the restart of the | |
312 | * journal handle if the filesystem is forzen and active | |
313 | * handles are not stopped. | |
314 | */ | |
315 | if (!handle) | |
316 | vfs_check_frozen(sb, SB_FREEZE_TRANS); | |
317 | ||
318 | if (!journal) | |
319 | return ext4_get_nojournal(); | |
320 | /* | |
321 | * Special case here: if the journal has aborted behind our | |
322 | * backs (eg. EIO in the commit thread), then we still need to | |
323 | * take the FS itself readonly cleanly. | |
324 | */ | |
325 | if (is_journal_aborted(journal)) { | |
326 | ext4_abort(sb, "Detected aborted journal"); | |
327 | return ERR_PTR(-EROFS); | |
ac27a0ec | 328 | } |
be4f27d3 | 329 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
330 | } |
331 | ||
332 | /* | |
333 | * The only special thing we need to do here is to make sure that all | |
dab291af | 334 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
335 | * that sync() will call the filesystem's write_super callback if |
336 | * appropriate. | |
337 | */ | |
c398eda0 | 338 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
339 | { |
340 | struct super_block *sb; | |
341 | int err; | |
342 | int rc; | |
343 | ||
0390131b | 344 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 345 | ext4_put_nojournal(handle); |
0390131b FM |
346 | return 0; |
347 | } | |
ac27a0ec DK |
348 | sb = handle->h_transaction->t_journal->j_private; |
349 | err = handle->h_err; | |
dab291af | 350 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
351 | |
352 | if (!err) | |
353 | err = rc; | |
354 | if (err) | |
c398eda0 | 355 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
356 | return err; |
357 | } | |
358 | ||
90c7201b TT |
359 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
360 | const char *err_fn, struct buffer_head *bh, | |
361 | handle_t *handle, int err) | |
ac27a0ec DK |
362 | { |
363 | char nbuf[16]; | |
617ba13b | 364 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 365 | |
0390131b FM |
366 | BUG_ON(!ext4_handle_valid(handle)); |
367 | ||
ac27a0ec DK |
368 | if (bh) |
369 | BUFFER_TRACE(bh, "abort"); | |
370 | ||
371 | if (!handle->h_err) | |
372 | handle->h_err = err; | |
373 | ||
374 | if (is_handle_aborted(handle)) | |
375 | return; | |
376 | ||
90c7201b TT |
377 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
378 | caller, line, errstr, err_fn); | |
ac27a0ec | 379 | |
dab291af | 380 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
381 | } |
382 | ||
1c13d5c0 TT |
383 | static void __save_error_info(struct super_block *sb, const char *func, |
384 | unsigned int line) | |
385 | { | |
386 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
387 | ||
388 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
389 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
390 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
391 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
392 | es->s_last_error_line = cpu_to_le32(line); | |
393 | if (!es->s_first_error_time) { | |
394 | es->s_first_error_time = es->s_last_error_time; | |
395 | strncpy(es->s_first_error_func, func, | |
396 | sizeof(es->s_first_error_func)); | |
397 | es->s_first_error_line = cpu_to_le32(line); | |
398 | es->s_first_error_ino = es->s_last_error_ino; | |
399 | es->s_first_error_block = es->s_last_error_block; | |
400 | } | |
66e61a9e TT |
401 | /* |
402 | * Start the daily error reporting function if it hasn't been | |
403 | * started already | |
404 | */ | |
405 | if (!es->s_error_count) | |
406 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
407 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
408 | } | |
409 | ||
410 | static void save_error_info(struct super_block *sb, const char *func, | |
411 | unsigned int line) | |
412 | { | |
413 | __save_error_info(sb, func, line); | |
414 | ext4_commit_super(sb, 1); | |
415 | } | |
416 | ||
417 | ||
ac27a0ec DK |
418 | /* Deal with the reporting of failure conditions on a filesystem such as |
419 | * inconsistencies detected or read IO failures. | |
420 | * | |
421 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 422 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
423 | * write ordering constraints on the superblock which prevent us from |
424 | * writing it out straight away; and given that the journal is about to | |
425 | * be aborted, we can't rely on the current, or future, transactions to | |
426 | * write out the superblock safely. | |
427 | * | |
dab291af | 428 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 429 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
430 | * that error until we've noted it down and cleared it. |
431 | */ | |
432 | ||
617ba13b | 433 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 434 | { |
ac27a0ec DK |
435 | if (sb->s_flags & MS_RDONLY) |
436 | return; | |
437 | ||
2b2d6d01 | 438 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 439 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 440 | |
4ab2f15b | 441 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 442 | if (journal) |
dab291af | 443 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 444 | } |
2b2d6d01 | 445 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 446 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
447 | sb->s_flags |= MS_RDONLY; |
448 | } | |
ac27a0ec | 449 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 450 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
451 | sb->s_id); |
452 | } | |
453 | ||
12062ddd | 454 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 455 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 456 | { |
0ff2ea7d | 457 | struct va_format vaf; |
ac27a0ec DK |
458 | va_list args; |
459 | ||
460 | va_start(args, fmt); | |
0ff2ea7d JP |
461 | vaf.fmt = fmt; |
462 | vaf.va = &args; | |
463 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
464 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
465 | va_end(args); |
466 | ||
617ba13b | 467 | ext4_handle_error(sb); |
ac27a0ec DK |
468 | } |
469 | ||
c398eda0 TT |
470 | void ext4_error_inode(struct inode *inode, const char *function, |
471 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
472 | const char *fmt, ...) |
473 | { | |
474 | va_list args; | |
f7c21177 | 475 | struct va_format vaf; |
1c13d5c0 | 476 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 477 | |
1c13d5c0 TT |
478 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
479 | es->s_last_error_block = cpu_to_le64(block); | |
480 | save_error_info(inode->i_sb, function, line); | |
273df556 | 481 | va_start(args, fmt); |
f7c21177 TT |
482 | vaf.fmt = fmt; |
483 | vaf.va = &args; | |
c398eda0 TT |
484 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
485 | inode->i_sb->s_id, function, line, inode->i_ino); | |
486 | if (block) | |
f7c21177 TT |
487 | printk(KERN_CONT "block %llu: ", block); |
488 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
489 | va_end(args); |
490 | ||
491 | ext4_handle_error(inode->i_sb); | |
492 | } | |
493 | ||
c398eda0 | 494 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
495 | unsigned int line, ext4_fsblk_t block, |
496 | const char *fmt, ...) | |
273df556 FM |
497 | { |
498 | va_list args; | |
f7c21177 | 499 | struct va_format vaf; |
1c13d5c0 | 500 | struct ext4_super_block *es; |
273df556 FM |
501 | struct inode *inode = file->f_dentry->d_inode; |
502 | char pathname[80], *path; | |
503 | ||
1c13d5c0 TT |
504 | es = EXT4_SB(inode->i_sb)->s_es; |
505 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
506 | save_error_info(inode->i_sb, function, line); | |
273df556 | 507 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 508 | if (IS_ERR(path)) |
273df556 FM |
509 | path = "(unknown)"; |
510 | printk(KERN_CRIT | |
f7c21177 TT |
511 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
512 | inode->i_sb->s_id, function, line, inode->i_ino); | |
513 | if (block) | |
514 | printk(KERN_CONT "block %llu: ", block); | |
515 | va_start(args, fmt); | |
516 | vaf.fmt = fmt; | |
517 | vaf.va = &args; | |
518 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
519 | va_end(args); |
520 | ||
521 | ext4_handle_error(inode->i_sb); | |
522 | } | |
523 | ||
2b2d6d01 | 524 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
525 | char nbuf[16]) |
526 | { | |
527 | char *errstr = NULL; | |
528 | ||
529 | switch (errno) { | |
530 | case -EIO: | |
531 | errstr = "IO failure"; | |
532 | break; | |
533 | case -ENOMEM: | |
534 | errstr = "Out of memory"; | |
535 | break; | |
536 | case -EROFS: | |
78f1ddbb TT |
537 | if (!sb || (EXT4_SB(sb)->s_journal && |
538 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
539 | errstr = "Journal has aborted"; |
540 | else | |
541 | errstr = "Readonly filesystem"; | |
542 | break; | |
543 | default: | |
544 | /* If the caller passed in an extra buffer for unknown | |
545 | * errors, textualise them now. Else we just return | |
546 | * NULL. */ | |
547 | if (nbuf) { | |
548 | /* Check for truncated error codes... */ | |
549 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
550 | errstr = nbuf; | |
551 | } | |
552 | break; | |
553 | } | |
554 | ||
555 | return errstr; | |
556 | } | |
557 | ||
617ba13b | 558 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
559 | * automatically and invokes the appropriate error response. */ |
560 | ||
c398eda0 TT |
561 | void __ext4_std_error(struct super_block *sb, const char *function, |
562 | unsigned int line, int errno) | |
ac27a0ec DK |
563 | { |
564 | char nbuf[16]; | |
565 | const char *errstr; | |
566 | ||
567 | /* Special case: if the error is EROFS, and we're not already | |
568 | * inside a transaction, then there's really no point in logging | |
569 | * an error. */ | |
570 | if (errno == -EROFS && journal_current_handle() == NULL && | |
571 | (sb->s_flags & MS_RDONLY)) | |
572 | return; | |
573 | ||
617ba13b | 574 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
575 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
576 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 577 | save_error_info(sb, function, line); |
ac27a0ec | 578 | |
617ba13b | 579 | ext4_handle_error(sb); |
ac27a0ec DK |
580 | } |
581 | ||
582 | /* | |
617ba13b | 583 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
584 | * abort function may be used to deal with unrecoverable failures such |
585 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
586 | * | |
587 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
588 | * unless the error response on the fs has been set to panic in which | |
589 | * case we take the easy way out and panic immediately. | |
590 | */ | |
591 | ||
c67d859e | 592 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 593 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
594 | { |
595 | va_list args; | |
596 | ||
1c13d5c0 | 597 | save_error_info(sb, function, line); |
ac27a0ec | 598 | va_start(args, fmt); |
c398eda0 TT |
599 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
600 | function, line); | |
ac27a0ec DK |
601 | vprintk(fmt, args); |
602 | printk("\n"); | |
603 | va_end(args); | |
604 | ||
1c13d5c0 TT |
605 | if ((sb->s_flags & MS_RDONLY) == 0) { |
606 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
607 | sb->s_flags |= MS_RDONLY; | |
608 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
609 | if (EXT4_SB(sb)->s_journal) | |
610 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
611 | save_error_info(sb, function, line); | |
612 | } | |
ac27a0ec | 613 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 614 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
615 | } |
616 | ||
0ff2ea7d | 617 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 618 | { |
0ff2ea7d | 619 | struct va_format vaf; |
b31e1552 ES |
620 | va_list args; |
621 | ||
622 | va_start(args, fmt); | |
0ff2ea7d JP |
623 | vaf.fmt = fmt; |
624 | vaf.va = &args; | |
625 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
626 | va_end(args); |
627 | } | |
628 | ||
12062ddd | 629 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 630 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 631 | { |
0ff2ea7d | 632 | struct va_format vaf; |
ac27a0ec DK |
633 | va_list args; |
634 | ||
635 | va_start(args, fmt); | |
0ff2ea7d JP |
636 | vaf.fmt = fmt; |
637 | vaf.va = &args; | |
638 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
639 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
640 | va_end(args); |
641 | } | |
642 | ||
e29136f8 TT |
643 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
644 | struct super_block *sb, ext4_group_t grp, | |
645 | unsigned long ino, ext4_fsblk_t block, | |
646 | const char *fmt, ...) | |
5d1b1b3f AK |
647 | __releases(bitlock) |
648 | __acquires(bitlock) | |
649 | { | |
0ff2ea7d | 650 | struct va_format vaf; |
5d1b1b3f AK |
651 | va_list args; |
652 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
653 | ||
1c13d5c0 TT |
654 | es->s_last_error_ino = cpu_to_le32(ino); |
655 | es->s_last_error_block = cpu_to_le64(block); | |
656 | __save_error_info(sb, function, line); | |
0ff2ea7d | 657 | |
5d1b1b3f | 658 | va_start(args, fmt); |
0ff2ea7d JP |
659 | |
660 | vaf.fmt = fmt; | |
661 | vaf.va = &args; | |
21149d61 | 662 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
663 | sb->s_id, function, line, grp); |
664 | if (ino) | |
0ff2ea7d | 665 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 666 | if (block) |
0ff2ea7d JP |
667 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
668 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
669 | va_end(args); |
670 | ||
671 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 672 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
673 | return; |
674 | } | |
1c13d5c0 | 675 | |
5d1b1b3f AK |
676 | ext4_unlock_group(sb, grp); |
677 | ext4_handle_error(sb); | |
678 | /* | |
679 | * We only get here in the ERRORS_RO case; relocking the group | |
680 | * may be dangerous, but nothing bad will happen since the | |
681 | * filesystem will have already been marked read/only and the | |
682 | * journal has been aborted. We return 1 as a hint to callers | |
683 | * who might what to use the return value from | |
25985edc | 684 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
685 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
686 | * aggressively from the ext4 function in question, with a | |
687 | * more appropriate error code. | |
688 | */ | |
689 | ext4_lock_group(sb, grp); | |
690 | return; | |
691 | } | |
692 | ||
617ba13b | 693 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 694 | { |
617ba13b | 695 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 696 | |
617ba13b | 697 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
698 | return; |
699 | ||
12062ddd | 700 | ext4_warning(sb, |
ac27a0ec DK |
701 | "updating to rev %d because of new feature flag, " |
702 | "running e2fsck is recommended", | |
617ba13b | 703 | EXT4_DYNAMIC_REV); |
ac27a0ec | 704 | |
617ba13b MC |
705 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
706 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
707 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
708 | /* leave es->s_feature_*compat flags alone */ |
709 | /* es->s_uuid will be set by e2fsck if empty */ | |
710 | ||
711 | /* | |
712 | * The rest of the superblock fields should be zero, and if not it | |
713 | * means they are likely already in use, so leave them alone. We | |
714 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
715 | */ | |
716 | } | |
717 | ||
718 | /* | |
719 | * Open the external journal device | |
720 | */ | |
b31e1552 | 721 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
722 | { |
723 | struct block_device *bdev; | |
724 | char b[BDEVNAME_SIZE]; | |
725 | ||
d4d77629 | 726 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
727 | if (IS_ERR(bdev)) |
728 | goto fail; | |
729 | return bdev; | |
730 | ||
731 | fail: | |
b31e1552 | 732 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
733 | __bdevname(dev, b), PTR_ERR(bdev)); |
734 | return NULL; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Release the journal device | |
739 | */ | |
617ba13b | 740 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 741 | { |
e525fd89 | 742 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
743 | } |
744 | ||
617ba13b | 745 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
746 | { |
747 | struct block_device *bdev; | |
748 | int ret = -ENODEV; | |
749 | ||
750 | bdev = sbi->journal_bdev; | |
751 | if (bdev) { | |
617ba13b | 752 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
753 | sbi->journal_bdev = NULL; |
754 | } | |
755 | return ret; | |
756 | } | |
757 | ||
758 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
759 | { | |
617ba13b | 760 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
761 | } |
762 | ||
617ba13b | 763 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
764 | { |
765 | struct list_head *l; | |
766 | ||
b31e1552 ES |
767 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
768 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
769 | |
770 | printk(KERN_ERR "sb_info orphan list:\n"); | |
771 | list_for_each(l, &sbi->s_orphan) { | |
772 | struct inode *inode = orphan_list_entry(l); | |
773 | printk(KERN_ERR " " | |
774 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
775 | inode->i_sb->s_id, inode->i_ino, inode, | |
776 | inode->i_mode, inode->i_nlink, | |
777 | NEXT_ORPHAN(inode)); | |
778 | } | |
779 | } | |
780 | ||
2b2d6d01 | 781 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 782 | { |
617ba13b MC |
783 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
784 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 785 | int i, err; |
ac27a0ec | 786 | |
857ac889 | 787 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
788 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
789 | ||
4c0425ff MC |
790 | flush_workqueue(sbi->dio_unwritten_wq); |
791 | destroy_workqueue(sbi->dio_unwritten_wq); | |
792 | ||
a9e220f8 | 793 | lock_super(sb); |
8c85e125 | 794 | if (sb->s_dirt) |
ebc1ac16 | 795 | ext4_commit_super(sb, 1); |
8c85e125 | 796 | |
0390131b FM |
797 | if (sbi->s_journal) { |
798 | err = jbd2_journal_destroy(sbi->s_journal); | |
799 | sbi->s_journal = NULL; | |
800 | if (err < 0) | |
c67d859e | 801 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 802 | } |
d4edac31 | 803 | |
a1c6c569 | 804 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
805 | ext4_release_system_zone(sb); |
806 | ext4_mb_release(sb); | |
807 | ext4_ext_release(sb); | |
808 | ext4_xattr_put_super(sb); | |
809 | ||
ac27a0ec | 810 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 811 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 812 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 813 | ext4_commit_super(sb, 1); |
ac27a0ec | 814 | } |
240799cd | 815 | if (sbi->s_proc) { |
9f6200bb | 816 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 817 | } |
3197ebdb | 818 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
819 | |
820 | for (i = 0; i < sbi->s_gdb_count; i++) | |
821 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 822 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 823 | ext4_kvfree(sbi->s_flex_groups); |
ac27a0ec DK |
824 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
825 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
826 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 827 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
828 | brelse(sbi->s_sbh); |
829 | #ifdef CONFIG_QUOTA | |
830 | for (i = 0; i < MAXQUOTAS; i++) | |
831 | kfree(sbi->s_qf_names[i]); | |
832 | #endif | |
833 | ||
834 | /* Debugging code just in case the in-memory inode orphan list | |
835 | * isn't empty. The on-disk one can be non-empty if we've | |
836 | * detected an error and taken the fs readonly, but the | |
837 | * in-memory list had better be clean by this point. */ | |
838 | if (!list_empty(&sbi->s_orphan)) | |
839 | dump_orphan_list(sb, sbi); | |
840 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
841 | ||
f98393a6 | 842 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
843 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
844 | /* | |
845 | * Invalidate the journal device's buffers. We don't want them | |
846 | * floating about in memory - the physical journal device may | |
847 | * hotswapped, and it breaks the `ro-after' testing code. | |
848 | */ | |
849 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 850 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 851 | ext4_blkdev_remove(sbi); |
ac27a0ec | 852 | } |
c5e06d10 JL |
853 | if (sbi->s_mmp_tsk) |
854 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 855 | sb->s_fs_info = NULL; |
3197ebdb TT |
856 | /* |
857 | * Now that we are completely done shutting down the | |
858 | * superblock, we need to actually destroy the kobject. | |
859 | */ | |
3197ebdb TT |
860 | unlock_super(sb); |
861 | kobject_put(&sbi->s_kobj); | |
862 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 863 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 864 | kfree(sbi); |
ac27a0ec DK |
865 | } |
866 | ||
e18b890b | 867 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
868 | |
869 | /* | |
870 | * Called inside transaction, so use GFP_NOFS | |
871 | */ | |
617ba13b | 872 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 873 | { |
617ba13b | 874 | struct ext4_inode_info *ei; |
ac27a0ec | 875 | |
e6b4f8da | 876 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
877 | if (!ei) |
878 | return NULL; | |
0b8e58a1 | 879 | |
ac27a0ec | 880 | ei->vfs_inode.i_version = 1; |
91246c00 | 881 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 882 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
883 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
884 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
885 | ei->i_reserved_data_blocks = 0; |
886 | ei->i_reserved_meta_blocks = 0; | |
887 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 888 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 889 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
890 | #ifdef CONFIG_QUOTA |
891 | ei->i_reserved_quota = 0; | |
892 | #endif | |
8aefcd55 | 893 | ei->jinode = NULL; |
c7064ef1 | 894 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 895 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 896 | ei->cur_aio_dio = NULL; |
b436b9be JK |
897 | ei->i_sync_tid = 0; |
898 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 899 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 900 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 901 | |
ac27a0ec DK |
902 | return &ei->vfs_inode; |
903 | } | |
904 | ||
7ff9c073 TT |
905 | static int ext4_drop_inode(struct inode *inode) |
906 | { | |
907 | int drop = generic_drop_inode(inode); | |
908 | ||
909 | trace_ext4_drop_inode(inode, drop); | |
910 | return drop; | |
911 | } | |
912 | ||
fa0d7e3d NP |
913 | static void ext4_i_callback(struct rcu_head *head) |
914 | { | |
915 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
916 | INIT_LIST_HEAD(&inode->i_dentry); | |
917 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); | |
918 | } | |
919 | ||
617ba13b | 920 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 921 | { |
9f7dd93d | 922 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
923 | ext4_msg(inode->i_sb, KERN_ERR, |
924 | "Inode %lu (%p): orphan list check failed!", | |
925 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
926 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
927 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
928 | true); | |
929 | dump_stack(); | |
930 | } | |
fa0d7e3d | 931 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
932 | } |
933 | ||
51cc5068 | 934 | static void init_once(void *foo) |
ac27a0ec | 935 | { |
617ba13b | 936 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 937 | |
a35afb83 | 938 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 939 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 940 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 941 | #endif |
0e855ac8 | 942 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 943 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
944 | } |
945 | ||
946 | static int init_inodecache(void) | |
947 | { | |
617ba13b MC |
948 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
949 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
950 | 0, (SLAB_RECLAIM_ACCOUNT| |
951 | SLAB_MEM_SPREAD), | |
20c2df83 | 952 | init_once); |
617ba13b | 953 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
954 | return -ENOMEM; |
955 | return 0; | |
956 | } | |
957 | ||
958 | static void destroy_inodecache(void) | |
959 | { | |
617ba13b | 960 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
961 | } |
962 | ||
0930fcc1 | 963 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 964 | { |
0930fcc1 AV |
965 | invalidate_inode_buffers(inode); |
966 | end_writeback(inode); | |
9f754758 | 967 | dquot_drop(inode); |
c2ea3fde | 968 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
969 | if (EXT4_I(inode)->jinode) { |
970 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
971 | EXT4_I(inode)->jinode); | |
972 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
973 | EXT4_I(inode)->jinode = NULL; | |
974 | } | |
ac27a0ec DK |
975 | } |
976 | ||
2b2d6d01 TT |
977 | static inline void ext4_show_quota_options(struct seq_file *seq, |
978 | struct super_block *sb) | |
ac27a0ec DK |
979 | { |
980 | #if defined(CONFIG_QUOTA) | |
617ba13b | 981 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 982 | |
5a20bdfc JK |
983 | if (sbi->s_jquota_fmt) { |
984 | char *fmtname = ""; | |
985 | ||
986 | switch (sbi->s_jquota_fmt) { | |
987 | case QFMT_VFS_OLD: | |
988 | fmtname = "vfsold"; | |
989 | break; | |
990 | case QFMT_VFS_V0: | |
991 | fmtname = "vfsv0"; | |
992 | break; | |
993 | case QFMT_VFS_V1: | |
994 | fmtname = "vfsv1"; | |
995 | break; | |
996 | } | |
997 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
998 | } | |
ac27a0ec DK |
999 | |
1000 | if (sbi->s_qf_names[USRQUOTA]) | |
1001 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1002 | ||
1003 | if (sbi->s_qf_names[GRPQUOTA]) | |
1004 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1005 | ||
482a7425 | 1006 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
1007 | seq_puts(seq, ",usrquota"); |
1008 | ||
482a7425 | 1009 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
1010 | seq_puts(seq, ",grpquota"); |
1011 | #endif | |
1012 | } | |
1013 | ||
d9c9bef1 MS |
1014 | /* |
1015 | * Show an option if | |
1016 | * - it's set to a non-default value OR | |
1017 | * - if the per-sb default is different from the global default | |
1018 | */ | |
617ba13b | 1019 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 1020 | { |
aa22df2c AK |
1021 | int def_errors; |
1022 | unsigned long def_mount_opts; | |
ac27a0ec | 1023 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
1024 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1025 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
1026 | |
1027 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 1028 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
1029 | |
1030 | if (sbi->s_sb_block != 1) | |
1031 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
1032 | if (test_opt(sb, MINIX_DF)) | |
1033 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 1034 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
1035 | seq_puts(seq, ",grpid"); |
1036 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
1037 | seq_puts(seq, ",nogrpid"); | |
1038 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
1039 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
1040 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
1041 | } | |
1042 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
1043 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
1044 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
1045 | } | |
bb4f397a | 1046 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 1047 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
1048 | def_errors == EXT4_ERRORS_CONTINUE) { |
1049 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
1050 | } |
1051 | } | |
aa22df2c | 1052 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 1053 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 1054 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 1055 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 1056 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 1057 | seq_puts(seq, ",nouid32"); |
aa22df2c | 1058 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
1059 | seq_puts(seq, ",debug"); |
1060 | if (test_opt(sb, OLDALLOC)) | |
1061 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 1062 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 1063 | if (test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1064 | seq_puts(seq, ",user_xattr"); |
ea663336 | 1065 | if (!test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1066 | seq_puts(seq, ",nouser_xattr"); |
d9c9bef1 | 1067 | #endif |
03010a33 | 1068 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1069 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1070 | seq_puts(seq, ",acl"); |
1071 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1072 | seq_puts(seq, ",noacl"); | |
1073 | #endif | |
30773840 | 1074 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1075 | seq_printf(seq, ",commit=%u", |
1076 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1077 | } | |
30773840 TT |
1078 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1079 | seq_printf(seq, ",min_batch_time=%u", | |
1080 | (unsigned) sbi->s_min_batch_time); | |
1081 | } | |
1082 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1083 | seq_printf(seq, ",max_batch_time=%u", | |
1084 | (unsigned) sbi->s_min_batch_time); | |
1085 | } | |
1086 | ||
571640ca ES |
1087 | /* |
1088 | * We're changing the default of barrier mount option, so | |
1089 | * let's always display its mount state so it's clear what its | |
1090 | * status is. | |
1091 | */ | |
1092 | seq_puts(seq, ",barrier="); | |
1093 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1094 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1095 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1096 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1097 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1098 | if (test_opt(sb, I_VERSION)) |
1099 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1100 | if (!test_opt(sb, DELALLOC) && |
1101 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1102 | seq_puts(seq, ",nodelalloc"); |
1103 | ||
6fd7a467 TT |
1104 | if (!test_opt(sb, MBLK_IO_SUBMIT)) |
1105 | seq_puts(seq, ",nomblk_io_submit"); | |
cb45bbe4 MS |
1106 | if (sbi->s_stripe) |
1107 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1108 | /* |
1109 | * journal mode get enabled in different ways | |
1110 | * So just print the value even if we didn't specify it | |
1111 | */ | |
617ba13b | 1112 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1113 | seq_puts(seq, ",data=journal"); |
617ba13b | 1114 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1115 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1116 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1117 | seq_puts(seq, ",data=writeback"); |
1118 | ||
240799cd TT |
1119 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1120 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1121 | sbi->s_inode_readahead_blks); | |
1122 | ||
5bf5683a HK |
1123 | if (test_opt(sb, DATA_ERR_ABORT)) |
1124 | seq_puts(seq, ",data_err=abort"); | |
1125 | ||
afd4672d | 1126 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1127 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1128 | |
8b67f04a | 1129 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1130 | seq_puts(seq, ",discard"); |
1131 | ||
e3bb52ae ES |
1132 | if (test_opt(sb, NOLOAD)) |
1133 | seq_puts(seq, ",norecovery"); | |
1134 | ||
744692dc JZ |
1135 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1136 | seq_puts(seq, ",dioread_nolock"); | |
1137 | ||
8b67f04a TT |
1138 | if (test_opt(sb, BLOCK_VALIDITY) && |
1139 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1140 | seq_puts(seq, ",block_validity"); | |
1141 | ||
bfff6873 LC |
1142 | if (!test_opt(sb, INIT_INODE_TABLE)) |
1143 | seq_puts(seq, ",noinit_inode_table"); | |
51ce6511 | 1144 | else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) |
bfff6873 LC |
1145 | seq_printf(seq, ",init_inode_table=%u", |
1146 | (unsigned) sbi->s_li_wait_mult); | |
1147 | ||
617ba13b | 1148 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1149 | |
ac27a0ec DK |
1150 | return 0; |
1151 | } | |
1152 | ||
1b961ac0 | 1153 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1154 | u64 ino, u32 generation) |
ac27a0ec | 1155 | { |
ac27a0ec | 1156 | struct inode *inode; |
ac27a0ec | 1157 | |
617ba13b | 1158 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1159 | return ERR_PTR(-ESTALE); |
617ba13b | 1160 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1161 | return ERR_PTR(-ESTALE); |
1162 | ||
1163 | /* iget isn't really right if the inode is currently unallocated!! | |
1164 | * | |
617ba13b | 1165 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1166 | * deleted, so we should be safe. |
1167 | * | |
1168 | * Currently we don't know the generation for parent directory, so | |
1169 | * a generation of 0 means "accept any" | |
1170 | */ | |
1d1fe1ee DH |
1171 | inode = ext4_iget(sb, ino); |
1172 | if (IS_ERR(inode)) | |
1173 | return ERR_CAST(inode); | |
1174 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1175 | iput(inode); |
1176 | return ERR_PTR(-ESTALE); | |
1177 | } | |
1b961ac0 CH |
1178 | |
1179 | return inode; | |
1180 | } | |
1181 | ||
1182 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1183 | int fh_len, int fh_type) |
1b961ac0 CH |
1184 | { |
1185 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1186 | ext4_nfs_get_inode); | |
1187 | } | |
1188 | ||
1189 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1190 | int fh_len, int fh_type) |
1b961ac0 CH |
1191 | { |
1192 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1193 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1194 | } |
1195 | ||
c39a7f84 TO |
1196 | /* |
1197 | * Try to release metadata pages (indirect blocks, directories) which are | |
1198 | * mapped via the block device. Since these pages could have journal heads | |
1199 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1200 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1201 | */ | |
0b8e58a1 AD |
1202 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1203 | gfp_t wait) | |
c39a7f84 TO |
1204 | { |
1205 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1206 | ||
1207 | WARN_ON(PageChecked(page)); | |
1208 | if (!page_has_buffers(page)) | |
1209 | return 0; | |
1210 | if (journal) | |
1211 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1212 | wait & ~__GFP_WAIT); | |
1213 | return try_to_free_buffers(page); | |
1214 | } | |
1215 | ||
ac27a0ec | 1216 | #ifdef CONFIG_QUOTA |
af5bc92d | 1217 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1218 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1219 | |
617ba13b MC |
1220 | static int ext4_write_dquot(struct dquot *dquot); |
1221 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1222 | static int ext4_release_dquot(struct dquot *dquot); | |
1223 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1224 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1225 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1226 | struct path *path); |
ca0e05e4 | 1227 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1228 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1229 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1230 | size_t len, loff_t off); |
617ba13b | 1231 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1232 | const char *data, size_t len, loff_t off); |
1233 | ||
61e225dc | 1234 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1235 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1236 | .write_dquot = ext4_write_dquot, |
1237 | .acquire_dquot = ext4_acquire_dquot, | |
1238 | .release_dquot = ext4_release_dquot, | |
1239 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1240 | .write_info = ext4_write_info, |
1241 | .alloc_dquot = dquot_alloc, | |
1242 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1243 | }; |
1244 | ||
0d54b217 | 1245 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1246 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1247 | .quota_off = ext4_quota_off, |
287a8095 CH |
1248 | .quota_sync = dquot_quota_sync, |
1249 | .get_info = dquot_get_dqinfo, | |
1250 | .set_info = dquot_set_dqinfo, | |
1251 | .get_dqblk = dquot_get_dqblk, | |
1252 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1253 | }; |
1254 | #endif | |
1255 | ||
ee9b6d61 | 1256 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1257 | .alloc_inode = ext4_alloc_inode, |
1258 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1259 | .write_inode = ext4_write_inode, |
1260 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1261 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1262 | .evict_inode = ext4_evict_inode, |
617ba13b | 1263 | .put_super = ext4_put_super, |
617ba13b | 1264 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1265 | .freeze_fs = ext4_freeze, |
1266 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1267 | .statfs = ext4_statfs, |
1268 | .remount_fs = ext4_remount, | |
617ba13b | 1269 | .show_options = ext4_show_options, |
ac27a0ec | 1270 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1271 | .quota_read = ext4_quota_read, |
1272 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1273 | #endif |
c39a7f84 | 1274 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1275 | }; |
1276 | ||
9ca92389 TT |
1277 | static const struct super_operations ext4_nojournal_sops = { |
1278 | .alloc_inode = ext4_alloc_inode, | |
1279 | .destroy_inode = ext4_destroy_inode, | |
1280 | .write_inode = ext4_write_inode, | |
1281 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1282 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1283 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1284 | .write_super = ext4_write_super, |
1285 | .put_super = ext4_put_super, | |
1286 | .statfs = ext4_statfs, | |
1287 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1288 | .show_options = ext4_show_options, |
1289 | #ifdef CONFIG_QUOTA | |
1290 | .quota_read = ext4_quota_read, | |
1291 | .quota_write = ext4_quota_write, | |
1292 | #endif | |
1293 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1294 | }; | |
1295 | ||
39655164 | 1296 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1297 | .fh_to_dentry = ext4_fh_to_dentry, |
1298 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1299 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1300 | }; |
1301 | ||
1302 | enum { | |
1303 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1304 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1305 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1306 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1307 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1308 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1309 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1310 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1311 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1312 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1313 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1314 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1315 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1316 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
1449032b TT |
1317 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1318 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1319 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1320 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1321 | Opt_discard, Opt_nodiscard, |
bfff6873 | 1322 | Opt_init_inode_table, Opt_noinit_inode_table, |
ac27a0ec DK |
1323 | }; |
1324 | ||
a447c093 | 1325 | static const match_table_t tokens = { |
ac27a0ec DK |
1326 | {Opt_bsd_df, "bsddf"}, |
1327 | {Opt_minix_df, "minixdf"}, | |
1328 | {Opt_grpid, "grpid"}, | |
1329 | {Opt_grpid, "bsdgroups"}, | |
1330 | {Opt_nogrpid, "nogrpid"}, | |
1331 | {Opt_nogrpid, "sysvgroups"}, | |
1332 | {Opt_resgid, "resgid=%u"}, | |
1333 | {Opt_resuid, "resuid=%u"}, | |
1334 | {Opt_sb, "sb=%u"}, | |
1335 | {Opt_err_cont, "errors=continue"}, | |
1336 | {Opt_err_panic, "errors=panic"}, | |
1337 | {Opt_err_ro, "errors=remount-ro"}, | |
1338 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1339 | {Opt_debug, "debug"}, |
1340 | {Opt_oldalloc, "oldalloc"}, | |
1341 | {Opt_orlov, "orlov"}, | |
1342 | {Opt_user_xattr, "user_xattr"}, | |
1343 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1344 | {Opt_acl, "acl"}, | |
1345 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1346 | {Opt_noload, "noload"}, |
e3bb52ae | 1347 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1348 | {Opt_nobh, "nobh"}, |
1349 | {Opt_bh, "bh"}, | |
1350 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1351 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1352 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1353 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1354 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1355 | {Opt_journal_checksum, "journal_checksum"}, |
1356 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1357 | {Opt_abort, "abort"}, |
1358 | {Opt_data_journal, "data=journal"}, | |
1359 | {Opt_data_ordered, "data=ordered"}, | |
1360 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1361 | {Opt_data_err_abort, "data_err=abort"}, |
1362 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1363 | {Opt_offusrjquota, "usrjquota="}, |
1364 | {Opt_usrjquota, "usrjquota=%s"}, | |
1365 | {Opt_offgrpjquota, "grpjquota="}, | |
1366 | {Opt_grpjquota, "grpjquota=%s"}, | |
1367 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1368 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1369 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1370 | {Opt_grpquota, "grpquota"}, |
1371 | {Opt_noquota, "noquota"}, | |
1372 | {Opt_quota, "quota"}, | |
1373 | {Opt_usrquota, "usrquota"}, | |
1374 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1375 | {Opt_barrier, "barrier"}, |
1376 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1377 | {Opt_i_version, "i_version"}, |
c9de560d | 1378 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1379 | {Opt_resize, "resize"}, |
64769240 | 1380 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1381 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1382 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1383 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1384 | {Opt_block_validity, "block_validity"}, |
1385 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1386 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1387 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1388 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1389 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1390 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1391 | {Opt_dioread_nolock, "dioread_nolock"}, |
1392 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1393 | {Opt_discard, "discard"}, |
1394 | {Opt_nodiscard, "nodiscard"}, | |
bfff6873 LC |
1395 | {Opt_init_inode_table, "init_itable=%u"}, |
1396 | {Opt_init_inode_table, "init_itable"}, | |
1397 | {Opt_noinit_inode_table, "noinit_itable"}, | |
f3f12faa | 1398 | {Opt_err, NULL}, |
ac27a0ec DK |
1399 | }; |
1400 | ||
617ba13b | 1401 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1402 | { |
617ba13b | 1403 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1404 | char *options = (char *) *data; |
1405 | ||
1406 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1407 | return 1; /* Default location */ | |
0b8e58a1 | 1408 | |
ac27a0ec | 1409 | options += 3; |
0b8e58a1 | 1410 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1411 | sb_block = simple_strtoul(options, &options, 0); |
1412 | if (*options && *options != ',') { | |
4776004f | 1413 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1414 | (char *) *data); |
1415 | return 1; | |
1416 | } | |
1417 | if (*options == ',') | |
1418 | options++; | |
1419 | *data = (void *) options; | |
0b8e58a1 | 1420 | |
ac27a0ec DK |
1421 | return sb_block; |
1422 | } | |
1423 | ||
b3881f74 | 1424 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1425 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1426 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1427 | |
56c50f11 DM |
1428 | #ifdef CONFIG_QUOTA |
1429 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1430 | { | |
1431 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1432 | char *qname; | |
1433 | ||
1434 | if (sb_any_quota_loaded(sb) && | |
1435 | !sbi->s_qf_names[qtype]) { | |
1436 | ext4_msg(sb, KERN_ERR, | |
1437 | "Cannot change journaled " | |
1438 | "quota options when quota turned on"); | |
1439 | return 0; | |
1440 | } | |
1441 | qname = match_strdup(args); | |
1442 | if (!qname) { | |
1443 | ext4_msg(sb, KERN_ERR, | |
1444 | "Not enough memory for storing quotafile name"); | |
1445 | return 0; | |
1446 | } | |
1447 | if (sbi->s_qf_names[qtype] && | |
1448 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1449 | ext4_msg(sb, KERN_ERR, | |
1450 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1451 | kfree(qname); | |
1452 | return 0; | |
1453 | } | |
1454 | sbi->s_qf_names[qtype] = qname; | |
1455 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1456 | ext4_msg(sb, KERN_ERR, | |
1457 | "quotafile must be on filesystem root"); | |
1458 | kfree(sbi->s_qf_names[qtype]); | |
1459 | sbi->s_qf_names[qtype] = NULL; | |
1460 | return 0; | |
1461 | } | |
fd8c37ec | 1462 | set_opt(sb, QUOTA); |
56c50f11 DM |
1463 | return 1; |
1464 | } | |
1465 | ||
1466 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1467 | { | |
1468 | ||
1469 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1470 | ||
1471 | if (sb_any_quota_loaded(sb) && | |
1472 | sbi->s_qf_names[qtype]) { | |
1473 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1474 | " when quota turned on"); | |
1475 | return 0; | |
1476 | } | |
1477 | /* | |
1478 | * The space will be released later when all options are confirmed | |
1479 | * to be correct | |
1480 | */ | |
1481 | sbi->s_qf_names[qtype] = NULL; | |
1482 | return 1; | |
1483 | } | |
1484 | #endif | |
1485 | ||
2b2d6d01 | 1486 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1487 | unsigned long *journal_devnum, |
b3881f74 | 1488 | unsigned int *journal_ioprio, |
2b2d6d01 | 1489 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1490 | { |
617ba13b | 1491 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1492 | char *p; |
ac27a0ec DK |
1493 | substring_t args[MAX_OPT_ARGS]; |
1494 | int data_opt = 0; | |
1495 | int option; | |
1496 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1497 | int qfmt; |
ac27a0ec DK |
1498 | #endif |
1499 | ||
1500 | if (!options) | |
1501 | return 1; | |
1502 | ||
2b2d6d01 | 1503 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1504 | int token; |
1505 | if (!*p) | |
1506 | continue; | |
1507 | ||
15121c18 ES |
1508 | /* |
1509 | * Initialize args struct so we know whether arg was | |
1510 | * found; some options take optional arguments. | |
1511 | */ | |
7dc57615 | 1512 | args[0].to = args[0].from = NULL; |
ac27a0ec DK |
1513 | token = match_token(p, tokens, args); |
1514 | switch (token) { | |
1515 | case Opt_bsd_df: | |
437ca0fd | 1516 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1517 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1518 | break; |
1519 | case Opt_minix_df: | |
437ca0fd | 1520 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1521 | set_opt(sb, MINIX_DF); |
437ca0fd | 1522 | |
ac27a0ec DK |
1523 | break; |
1524 | case Opt_grpid: | |
437ca0fd | 1525 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1526 | set_opt(sb, GRPID); |
437ca0fd | 1527 | |
ac27a0ec DK |
1528 | break; |
1529 | case Opt_nogrpid: | |
437ca0fd | 1530 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1531 | clear_opt(sb, GRPID); |
437ca0fd | 1532 | |
ac27a0ec DK |
1533 | break; |
1534 | case Opt_resuid: | |
1535 | if (match_int(&args[0], &option)) | |
1536 | return 0; | |
1537 | sbi->s_resuid = option; | |
1538 | break; | |
1539 | case Opt_resgid: | |
1540 | if (match_int(&args[0], &option)) | |
1541 | return 0; | |
1542 | sbi->s_resgid = option; | |
1543 | break; | |
1544 | case Opt_sb: | |
1545 | /* handled by get_sb_block() instead of here */ | |
1546 | /* *sb_block = match_int(&args[0]); */ | |
1547 | break; | |
1548 | case Opt_err_panic: | |
fd8c37ec TT |
1549 | clear_opt(sb, ERRORS_CONT); |
1550 | clear_opt(sb, ERRORS_RO); | |
1551 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1552 | break; |
1553 | case Opt_err_ro: | |
fd8c37ec TT |
1554 | clear_opt(sb, ERRORS_CONT); |
1555 | clear_opt(sb, ERRORS_PANIC); | |
1556 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1557 | break; |
1558 | case Opt_err_cont: | |
fd8c37ec TT |
1559 | clear_opt(sb, ERRORS_RO); |
1560 | clear_opt(sb, ERRORS_PANIC); | |
1561 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1562 | break; |
1563 | case Opt_nouid32: | |
fd8c37ec | 1564 | set_opt(sb, NO_UID32); |
ac27a0ec | 1565 | break; |
ac27a0ec | 1566 | case Opt_debug: |
fd8c37ec | 1567 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1568 | break; |
1569 | case Opt_oldalloc: | |
fd8c37ec | 1570 | set_opt(sb, OLDALLOC); |
ac27a0ec DK |
1571 | break; |
1572 | case Opt_orlov: | |
fd8c37ec | 1573 | clear_opt(sb, OLDALLOC); |
ac27a0ec | 1574 | break; |
03010a33 | 1575 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1576 | case Opt_user_xattr: |
fd8c37ec | 1577 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1578 | break; |
1579 | case Opt_nouser_xattr: | |
fd8c37ec | 1580 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1581 | break; |
1582 | #else | |
1583 | case Opt_user_xattr: | |
1584 | case Opt_nouser_xattr: | |
b31e1552 | 1585 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1586 | break; |
1587 | #endif | |
03010a33 | 1588 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1589 | case Opt_acl: |
fd8c37ec | 1590 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1591 | break; |
1592 | case Opt_noacl: | |
fd8c37ec | 1593 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1594 | break; |
1595 | #else | |
1596 | case Opt_acl: | |
1597 | case Opt_noacl: | |
b31e1552 | 1598 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1599 | break; |
1600 | #endif | |
ac27a0ec DK |
1601 | case Opt_journal_update: |
1602 | /* @@@ FIXME */ | |
1603 | /* Eventually we will want to be able to create | |
1604 | a journal file here. For now, only allow the | |
1605 | user to specify an existing inode to be the | |
1606 | journal file. */ | |
1607 | if (is_remount) { | |
b31e1552 ES |
1608 | ext4_msg(sb, KERN_ERR, |
1609 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1610 | return 0; |
1611 | } | |
fd8c37ec | 1612 | set_opt(sb, UPDATE_JOURNAL); |
ac27a0ec | 1613 | break; |
ac27a0ec DK |
1614 | case Opt_journal_dev: |
1615 | if (is_remount) { | |
b31e1552 ES |
1616 | ext4_msg(sb, KERN_ERR, |
1617 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1618 | return 0; |
1619 | } | |
1620 | if (match_int(&args[0], &option)) | |
1621 | return 0; | |
1622 | *journal_devnum = option; | |
1623 | break; | |
818d276c | 1624 | case Opt_journal_checksum: |
fd8c37ec | 1625 | set_opt(sb, JOURNAL_CHECKSUM); |
d4da6c9c | 1626 | break; |
818d276c | 1627 | case Opt_journal_async_commit: |
fd8c37ec TT |
1628 | set_opt(sb, JOURNAL_ASYNC_COMMIT); |
1629 | set_opt(sb, JOURNAL_CHECKSUM); | |
818d276c | 1630 | break; |
ac27a0ec | 1631 | case Opt_noload: |
fd8c37ec | 1632 | set_opt(sb, NOLOAD); |
ac27a0ec DK |
1633 | break; |
1634 | case Opt_commit: | |
1635 | if (match_int(&args[0], &option)) | |
1636 | return 0; | |
1637 | if (option < 0) | |
1638 | return 0; | |
1639 | if (option == 0) | |
cd02ff0b | 1640 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1641 | sbi->s_commit_interval = HZ * option; |
1642 | break; | |
30773840 TT |
1643 | case Opt_max_batch_time: |
1644 | if (match_int(&args[0], &option)) | |
1645 | return 0; | |
1646 | if (option < 0) | |
1647 | return 0; | |
1648 | if (option == 0) | |
1649 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1650 | sbi->s_max_batch_time = option; | |
1651 | break; | |
1652 | case Opt_min_batch_time: | |
1653 | if (match_int(&args[0], &option)) | |
1654 | return 0; | |
1655 | if (option < 0) | |
1656 | return 0; | |
1657 | sbi->s_min_batch_time = option; | |
1658 | break; | |
ac27a0ec | 1659 | case Opt_data_journal: |
617ba13b | 1660 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1661 | goto datacheck; |
1662 | case Opt_data_ordered: | |
617ba13b | 1663 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1664 | goto datacheck; |
1665 | case Opt_data_writeback: | |
617ba13b | 1666 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1667 | datacheck: |
1668 | if (is_remount) { | |
482a7425 | 1669 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1670 | ext4_msg(sb, KERN_ERR, |
1671 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1672 | return 0; |
1673 | } | |
1674 | } else { | |
fd8c37ec | 1675 | clear_opt(sb, DATA_FLAGS); |
ac27a0ec DK |
1676 | sbi->s_mount_opt |= data_opt; |
1677 | } | |
1678 | break; | |
5bf5683a | 1679 | case Opt_data_err_abort: |
fd8c37ec | 1680 | set_opt(sb, DATA_ERR_ABORT); |
5bf5683a HK |
1681 | break; |
1682 | case Opt_data_err_ignore: | |
fd8c37ec | 1683 | clear_opt(sb, DATA_ERR_ABORT); |
5bf5683a | 1684 | break; |
ac27a0ec DK |
1685 | #ifdef CONFIG_QUOTA |
1686 | case Opt_usrjquota: | |
56c50f11 | 1687 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1688 | return 0; |
56c50f11 DM |
1689 | break; |
1690 | case Opt_grpjquota: | |
1691 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1692 | return 0; |
ac27a0ec DK |
1693 | break; |
1694 | case Opt_offusrjquota: | |
56c50f11 DM |
1695 | if (!clear_qf_name(sb, USRQUOTA)) |
1696 | return 0; | |
1697 | break; | |
ac27a0ec | 1698 | case Opt_offgrpjquota: |
56c50f11 | 1699 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1700 | return 0; |
ac27a0ec | 1701 | break; |
56c50f11 | 1702 | |
ac27a0ec | 1703 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1704 | qfmt = QFMT_VFS_OLD; |
1705 | goto set_qf_format; | |
ac27a0ec | 1706 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1707 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1708 | goto set_qf_format; |
1709 | case Opt_jqfmt_vfsv1: | |
1710 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1711 | set_qf_format: |
17bd13b3 | 1712 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1713 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1714 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1715 | "journaled quota options when " |
b31e1552 | 1716 | "quota turned on"); |
dfc5d03f JK |
1717 | return 0; |
1718 | } | |
1719 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1720 | break; |
1721 | case Opt_quota: | |
1722 | case Opt_usrquota: | |
fd8c37ec TT |
1723 | set_opt(sb, QUOTA); |
1724 | set_opt(sb, USRQUOTA); | |
ac27a0ec DK |
1725 | break; |
1726 | case Opt_grpquota: | |
fd8c37ec TT |
1727 | set_opt(sb, QUOTA); |
1728 | set_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1729 | break; |
1730 | case Opt_noquota: | |
17bd13b3 | 1731 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1732 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1733 | "options when quota turned on"); | |
ac27a0ec DK |
1734 | return 0; |
1735 | } | |
fd8c37ec TT |
1736 | clear_opt(sb, QUOTA); |
1737 | clear_opt(sb, USRQUOTA); | |
1738 | clear_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1739 | break; |
1740 | #else | |
1741 | case Opt_quota: | |
1742 | case Opt_usrquota: | |
1743 | case Opt_grpquota: | |
b31e1552 ES |
1744 | ext4_msg(sb, KERN_ERR, |
1745 | "quota options not supported"); | |
cd59e7b9 | 1746 | break; |
ac27a0ec DK |
1747 | case Opt_usrjquota: |
1748 | case Opt_grpjquota: | |
1749 | case Opt_offusrjquota: | |
1750 | case Opt_offgrpjquota: | |
1751 | case Opt_jqfmt_vfsold: | |
1752 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1753 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1754 | ext4_msg(sb, KERN_ERR, |
1755 | "journaled quota options not supported"); | |
ac27a0ec DK |
1756 | break; |
1757 | case Opt_noquota: | |
1758 | break; | |
1759 | #endif | |
1760 | case Opt_abort: | |
4ab2f15b | 1761 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1762 | break; |
06705bff | 1763 | case Opt_nobarrier: |
fd8c37ec | 1764 | clear_opt(sb, BARRIER); |
06705bff | 1765 | break; |
ac27a0ec | 1766 | case Opt_barrier: |
15121c18 ES |
1767 | if (args[0].from) { |
1768 | if (match_int(&args[0], &option)) | |
1769 | return 0; | |
1770 | } else | |
1771 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec | 1772 | if (option) |
fd8c37ec | 1773 | set_opt(sb, BARRIER); |
ac27a0ec | 1774 | else |
fd8c37ec | 1775 | clear_opt(sb, BARRIER); |
ac27a0ec DK |
1776 | break; |
1777 | case Opt_ignore: | |
1778 | break; | |
1779 | case Opt_resize: | |
1780 | if (!is_remount) { | |
b31e1552 ES |
1781 | ext4_msg(sb, KERN_ERR, |
1782 | "resize option only available " | |
1783 | "for remount"); | |
ac27a0ec DK |
1784 | return 0; |
1785 | } | |
1786 | if (match_int(&args[0], &option) != 0) | |
1787 | return 0; | |
1788 | *n_blocks_count = option; | |
1789 | break; | |
1790 | case Opt_nobh: | |
206f7ab4 CH |
1791 | ext4_msg(sb, KERN_WARNING, |
1792 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1793 | break; |
1794 | case Opt_bh: | |
206f7ab4 CH |
1795 | ext4_msg(sb, KERN_WARNING, |
1796 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1797 | break; |
25ec56b5 | 1798 | case Opt_i_version: |
fd8c37ec | 1799 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1800 | sb->s_flags |= MS_I_VERSION; |
1801 | break; | |
dd919b98 | 1802 | case Opt_nodelalloc: |
fd8c37ec | 1803 | clear_opt(sb, DELALLOC); |
dd919b98 | 1804 | break; |
1449032b | 1805 | case Opt_mblk_io_submit: |
fd8c37ec | 1806 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1807 | break; |
1808 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1809 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1810 | break; |
c9de560d AT |
1811 | case Opt_stripe: |
1812 | if (match_int(&args[0], &option)) | |
1813 | return 0; | |
1814 | if (option < 0) | |
1815 | return 0; | |
1816 | sbi->s_stripe = option; | |
1817 | break; | |
64769240 | 1818 | case Opt_delalloc: |
fd8c37ec | 1819 | set_opt(sb, DELALLOC); |
64769240 | 1820 | break; |
6fd058f7 | 1821 | case Opt_block_validity: |
fd8c37ec | 1822 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1823 | break; |
1824 | case Opt_noblock_validity: | |
fd8c37ec | 1825 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1826 | break; |
240799cd TT |
1827 | case Opt_inode_readahead_blks: |
1828 | if (match_int(&args[0], &option)) | |
1829 | return 0; | |
1830 | if (option < 0 || option > (1 << 30)) | |
1831 | return 0; | |
5dbd571d | 1832 | if (option && !is_power_of_2(option)) { |
b31e1552 ES |
1833 | ext4_msg(sb, KERN_ERR, |
1834 | "EXT4-fs: inode_readahead_blks" | |
1835 | " must be a power of 2"); | |
3197ebdb TT |
1836 | return 0; |
1837 | } | |
240799cd TT |
1838 | sbi->s_inode_readahead_blks = option; |
1839 | break; | |
b3881f74 TT |
1840 | case Opt_journal_ioprio: |
1841 | if (match_int(&args[0], &option)) | |
1842 | return 0; | |
1843 | if (option < 0 || option > 7) | |
1844 | break; | |
1845 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1846 | option); | |
1847 | break; | |
06705bff | 1848 | case Opt_noauto_da_alloc: |
fd8c37ec | 1849 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1850 | break; |
afd4672d | 1851 | case Opt_auto_da_alloc: |
15121c18 ES |
1852 | if (args[0].from) { |
1853 | if (match_int(&args[0], &option)) | |
1854 | return 0; | |
1855 | } else | |
1856 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1857 | if (option) |
fd8c37ec | 1858 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1859 | else |
fd8c37ec | 1860 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1861 | break; |
5328e635 | 1862 | case Opt_discard: |
fd8c37ec | 1863 | set_opt(sb, DISCARD); |
5328e635 ES |
1864 | break; |
1865 | case Opt_nodiscard: | |
fd8c37ec | 1866 | clear_opt(sb, DISCARD); |
5328e635 | 1867 | break; |
744692dc | 1868 | case Opt_dioread_nolock: |
fd8c37ec | 1869 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1870 | break; |
1871 | case Opt_dioread_lock: | |
fd8c37ec | 1872 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1873 | break; |
bfff6873 | 1874 | case Opt_init_inode_table: |
fd8c37ec | 1875 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1876 | if (args[0].from) { |
1877 | if (match_int(&args[0], &option)) | |
1878 | return 0; | |
1879 | } else | |
1880 | option = EXT4_DEF_LI_WAIT_MULT; | |
1881 | if (option < 0) | |
1882 | return 0; | |
1883 | sbi->s_li_wait_mult = option; | |
1884 | break; | |
1885 | case Opt_noinit_inode_table: | |
fd8c37ec | 1886 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1887 | break; |
ac27a0ec | 1888 | default: |
b31e1552 ES |
1889 | ext4_msg(sb, KERN_ERR, |
1890 | "Unrecognized mount option \"%s\" " | |
1891 | "or missing value", p); | |
ac27a0ec DK |
1892 | return 0; |
1893 | } | |
1894 | } | |
1895 | #ifdef CONFIG_QUOTA | |
1896 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1897 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1898 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1899 | |
482a7425 | 1900 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1901 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1902 | |
56c50f11 | 1903 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1904 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1905 | "format mixing"); | |
ac27a0ec DK |
1906 | return 0; |
1907 | } | |
1908 | ||
1909 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1910 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1911 | "not specified"); | |
ac27a0ec DK |
1912 | return 0; |
1913 | } | |
1914 | } else { | |
1915 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1916 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1917 | "specified with no journaling " |
b31e1552 | 1918 | "enabled"); |
ac27a0ec DK |
1919 | return 0; |
1920 | } | |
1921 | } | |
1922 | #endif | |
1923 | return 1; | |
1924 | } | |
1925 | ||
617ba13b | 1926 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1927 | int read_only) |
1928 | { | |
617ba13b | 1929 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1930 | int res = 0; |
1931 | ||
617ba13b | 1932 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1933 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1934 | "forcing read-only mode"); | |
ac27a0ec DK |
1935 | res = MS_RDONLY; |
1936 | } | |
1937 | if (read_only) | |
1938 | return res; | |
617ba13b | 1939 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1940 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1941 | "running e2fsck is recommended"); | |
617ba13b | 1942 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1943 | ext4_msg(sb, KERN_WARNING, |
1944 | "warning: mounting fs with errors, " | |
1945 | "running e2fsck is recommended"); | |
ed3ce80a | 1946 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1947 | le16_to_cpu(es->s_mnt_count) >= |
1948 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1949 | ext4_msg(sb, KERN_WARNING, |
1950 | "warning: maximal mount count reached, " | |
1951 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1952 | else if (le32_to_cpu(es->s_checkinterval) && |
1953 | (le32_to_cpu(es->s_lastcheck) + | |
1954 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1955 | ext4_msg(sb, KERN_WARNING, |
1956 | "warning: checktime reached, " | |
1957 | "running e2fsck is recommended"); | |
0b8e58a1 | 1958 | if (!sbi->s_journal) |
0390131b | 1959 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1960 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1961 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1962 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1963 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1964 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1965 | if (sbi->s_journal) |
1966 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1967 | |
e2d67052 | 1968 | ext4_commit_super(sb, 1); |
ac27a0ec | 1969 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1970 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1971 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1972 | sb->s_blocksize, |
1973 | sbi->s_groups_count, | |
617ba13b MC |
1974 | EXT4_BLOCKS_PER_GROUP(sb), |
1975 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1976 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1977 | |
7abc52c2 | 1978 | cleancache_init_fs(sb); |
ac27a0ec DK |
1979 | return res; |
1980 | } | |
1981 | ||
772cb7c8 JS |
1982 | static int ext4_fill_flex_info(struct super_block *sb) |
1983 | { | |
1984 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1985 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1986 | ext4_group_t flex_group_count; |
1987 | ext4_group_t flex_group; | |
1988 | int groups_per_flex = 0; | |
c5ca7c76 | 1989 | size_t size; |
772cb7c8 JS |
1990 | int i; |
1991 | ||
503358ae TT |
1992 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1993 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1994 | ||
1995 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1996 | sbi->s_log_groups_per_flex = 0; |
1997 | return 1; | |
1998 | } | |
1999 | ||
c62a11fd FB |
2000 | /* We allocate both existing and potentially added groups */ |
2001 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
2002 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
2003 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 | 2004 | size = flex_group_count * sizeof(struct flex_groups); |
9933fc0a | 2005 | sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); |
c5ca7c76 | 2006 | if (sbi->s_flex_groups == NULL) { |
9933fc0a TT |
2007 | ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", |
2008 | flex_group_count); | |
2009 | goto failed; | |
772cb7c8 | 2010 | } |
772cb7c8 | 2011 | |
772cb7c8 | 2012 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2013 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2014 | |
2015 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2016 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2017 | &sbi->s_flex_groups[flex_group].free_inodes); | |
2018 | atomic_add(ext4_free_blks_count(sb, gdp), | |
2019 | &sbi->s_flex_groups[flex_group].free_blocks); | |
2020 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
2021 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2022 | } |
2023 | ||
2024 | return 1; | |
2025 | failed: | |
2026 | return 0; | |
2027 | } | |
2028 | ||
717d50e4 AD |
2029 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
2030 | struct ext4_group_desc *gdp) | |
2031 | { | |
2032 | __u16 crc = 0; | |
2033 | ||
2034 | if (sbi->s_es->s_feature_ro_compat & | |
2035 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
2036 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2037 | __le32 le_group = cpu_to_le32(block_group); | |
2038 | ||
2039 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2040 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2041 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2042 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2043 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2044 | if ((sbi->s_es->s_feature_incompat & | |
2045 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2046 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2047 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2048 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2049 | offset); | |
2050 | } | |
2051 | ||
2052 | return cpu_to_le16(crc); | |
2053 | } | |
2054 | ||
2055 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
2056 | struct ext4_group_desc *gdp) | |
2057 | { | |
2058 | if ((sbi->s_es->s_feature_ro_compat & | |
2059 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
2060 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2061 | return 0; | |
2062 | ||
2063 | return 1; | |
2064 | } | |
2065 | ||
ac27a0ec | 2066 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2067 | static int ext4_check_descriptors(struct super_block *sb, |
2068 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2069 | { |
617ba13b MC |
2070 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2071 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2072 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2073 | ext4_fsblk_t block_bitmap; |
2074 | ext4_fsblk_t inode_bitmap; | |
2075 | ext4_fsblk_t inode_table; | |
ce421581 | 2076 | int flexbg_flag = 0; |
bfff6873 | 2077 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2078 | |
ce421581 JS |
2079 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2080 | flexbg_flag = 1; | |
2081 | ||
af5bc92d | 2082 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2083 | |
197cd65a AM |
2084 | for (i = 0; i < sbi->s_groups_count; i++) { |
2085 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2086 | ||
ce421581 | 2087 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2088 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2089 | else |
2090 | last_block = first_block + | |
617ba13b | 2091 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2092 | |
bfff6873 LC |
2093 | if ((grp == sbi->s_groups_count) && |
2094 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2095 | grp = i; | |
2096 | ||
8fadc143 | 2097 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2098 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2099 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2100 | "Block bitmap for group %u not in group " |
b31e1552 | 2101 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2102 | return 0; |
2103 | } | |
8fadc143 | 2104 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2105 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2106 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2107 | "Inode bitmap for group %u not in group " |
b31e1552 | 2108 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2109 | return 0; |
2110 | } | |
8fadc143 | 2111 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2112 | if (inode_table < first_block || |
2b2d6d01 | 2113 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2114 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2115 | "Inode table for group %u not in group " |
b31e1552 | 2116 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2117 | return 0; |
2118 | } | |
955ce5f5 | 2119 | ext4_lock_group(sb, i); |
717d50e4 | 2120 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2121 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2122 | "Checksum for group %u failed (%u!=%u)", | |
2123 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2124 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2125 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2126 | ext4_unlock_group(sb, i); |
8a266467 | 2127 | return 0; |
7ee1ec4c | 2128 | } |
717d50e4 | 2129 | } |
955ce5f5 | 2130 | ext4_unlock_group(sb, i); |
ce421581 JS |
2131 | if (!flexbg_flag) |
2132 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2133 | } |
bfff6873 LC |
2134 | if (NULL != first_not_zeroed) |
2135 | *first_not_zeroed = grp; | |
ac27a0ec | 2136 | |
bd81d8ee | 2137 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 2138 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2139 | return 1; |
2140 | } | |
2141 | ||
617ba13b | 2142 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2143 | * the superblock) which were deleted from all directories, but held open by |
2144 | * a process at the time of a crash. We walk the list and try to delete these | |
2145 | * inodes at recovery time (only with a read-write filesystem). | |
2146 | * | |
2147 | * In order to keep the orphan inode chain consistent during traversal (in | |
2148 | * case of crash during recovery), we link each inode into the superblock | |
2149 | * orphan list_head and handle it the same way as an inode deletion during | |
2150 | * normal operation (which journals the operations for us). | |
2151 | * | |
2152 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2153 | * accidentally point at an in-use or already deleted inode. The worst that | |
2154 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2155 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2156 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2157 | * inode cleanup for us, so we can safely abort without any further action. | |
2158 | */ | |
2b2d6d01 TT |
2159 | static void ext4_orphan_cleanup(struct super_block *sb, |
2160 | struct ext4_super_block *es) | |
ac27a0ec DK |
2161 | { |
2162 | unsigned int s_flags = sb->s_flags; | |
2163 | int nr_orphans = 0, nr_truncates = 0; | |
2164 | #ifdef CONFIG_QUOTA | |
2165 | int i; | |
2166 | #endif | |
2167 | if (!es->s_last_orphan) { | |
2168 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2169 | return; | |
2170 | } | |
2171 | ||
a8f48a95 | 2172 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2173 | ext4_msg(sb, KERN_ERR, "write access " |
2174 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2175 | return; |
2176 | } | |
2177 | ||
d39195c3 AG |
2178 | /* Check if feature set would not allow a r/w mount */ |
2179 | if (!ext4_feature_set_ok(sb, 0)) { | |
2180 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2181 | "unknown ROCOMPAT features"); | |
2182 | return; | |
2183 | } | |
2184 | ||
617ba13b | 2185 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2186 | if (es->s_last_orphan) |
2187 | jbd_debug(1, "Errors on filesystem, " | |
2188 | "clearing orphan list.\n"); | |
2189 | es->s_last_orphan = 0; | |
2190 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2191 | return; | |
2192 | } | |
2193 | ||
2194 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2195 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2196 | sb->s_flags &= ~MS_RDONLY; |
2197 | } | |
2198 | #ifdef CONFIG_QUOTA | |
2199 | /* Needed for iput() to work correctly and not trash data */ | |
2200 | sb->s_flags |= MS_ACTIVE; | |
2201 | /* Turn on quotas so that they are updated correctly */ | |
2202 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2203 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2204 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2205 | if (ret < 0) |
b31e1552 ES |
2206 | ext4_msg(sb, KERN_ERR, |
2207 | "Cannot turn on journaled " | |
2208 | "quota: error %d", ret); | |
ac27a0ec DK |
2209 | } |
2210 | } | |
2211 | #endif | |
2212 | ||
2213 | while (es->s_last_orphan) { | |
2214 | struct inode *inode; | |
2215 | ||
97bd42b9 JB |
2216 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2217 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2218 | es->s_last_orphan = 0; |
2219 | break; | |
2220 | } | |
2221 | ||
617ba13b | 2222 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2223 | dquot_initialize(inode); |
ac27a0ec | 2224 | if (inode->i_nlink) { |
b31e1552 ES |
2225 | ext4_msg(sb, KERN_DEBUG, |
2226 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2227 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2228 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2229 | inode->i_ino, inode->i_size); |
617ba13b | 2230 | ext4_truncate(inode); |
ac27a0ec DK |
2231 | nr_truncates++; |
2232 | } else { | |
b31e1552 ES |
2233 | ext4_msg(sb, KERN_DEBUG, |
2234 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2235 | __func__, inode->i_ino); |
ac27a0ec DK |
2236 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2237 | inode->i_ino); | |
2238 | nr_orphans++; | |
2239 | } | |
2240 | iput(inode); /* The delete magic happens here! */ | |
2241 | } | |
2242 | ||
2b2d6d01 | 2243 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2244 | |
2245 | if (nr_orphans) | |
b31e1552 ES |
2246 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2247 | PLURAL(nr_orphans)); | |
ac27a0ec | 2248 | if (nr_truncates) |
b31e1552 ES |
2249 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2250 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2251 | #ifdef CONFIG_QUOTA |
2252 | /* Turn quotas off */ | |
2253 | for (i = 0; i < MAXQUOTAS; i++) { | |
2254 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2255 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2256 | } |
2257 | #endif | |
2258 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2259 | } | |
0b8e58a1 | 2260 | |
cd2291a4 ES |
2261 | /* |
2262 | * Maximal extent format file size. | |
2263 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2264 | * extent format containers, within a sector_t, and within i_blocks | |
2265 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2266 | * so that won't be a limiting factor. | |
2267 | * | |
f17722f9 LC |
2268 | * However there is other limiting factor. We do store extents in the form |
2269 | * of starting block and length, hence the resulting length of the extent | |
2270 | * covering maximum file size must fit into on-disk format containers as | |
2271 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2272 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2273 | * | |
cd2291a4 ES |
2274 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2275 | */ | |
f287a1a5 | 2276 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2277 | { |
2278 | loff_t res; | |
2279 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2280 | ||
2281 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2282 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2283 | /* |
90c699a9 | 2284 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2285 | * i_block represent total blocks in 512 bytes |
2286 | * 32 == size of vfs inode i_blocks * 8 | |
2287 | */ | |
2288 | upper_limit = (1LL << 32) - 1; | |
2289 | ||
2290 | /* total blocks in file system block size */ | |
2291 | upper_limit >>= (blkbits - 9); | |
2292 | upper_limit <<= blkbits; | |
2293 | } | |
2294 | ||
f17722f9 LC |
2295 | /* |
2296 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2297 | * by one fs block, so ee_len can cover the extent of maximum file | |
2298 | * size | |
2299 | */ | |
2300 | res = (1LL << 32) - 1; | |
cd2291a4 | 2301 | res <<= blkbits; |
cd2291a4 ES |
2302 | |
2303 | /* Sanity check against vm- & vfs- imposed limits */ | |
2304 | if (res > upper_limit) | |
2305 | res = upper_limit; | |
2306 | ||
2307 | return res; | |
2308 | } | |
ac27a0ec | 2309 | |
ac27a0ec | 2310 | /* |
cd2291a4 | 2311 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2312 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2313 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2314 | */ |
f287a1a5 | 2315 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2316 | { |
617ba13b | 2317 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2318 | int meta_blocks; |
2319 | loff_t upper_limit; | |
0b8e58a1 AD |
2320 | /* This is calculated to be the largest file size for a dense, block |
2321 | * mapped file such that the file's total number of 512-byte sectors, | |
2322 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2323 | * | |
2324 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2325 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2326 | */ |
2327 | ||
f287a1a5 | 2328 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2329 | /* |
90c699a9 | 2330 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2331 | * the inode i_block field represents total file blocks in |
2332 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2333 | */ |
2334 | upper_limit = (1LL << 32) - 1; | |
2335 | ||
2336 | /* total blocks in file system block size */ | |
2337 | upper_limit >>= (bits - 9); | |
2338 | ||
2339 | } else { | |
8180a562 AK |
2340 | /* |
2341 | * We use 48 bit ext4_inode i_blocks | |
2342 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2343 | * represent total number of blocks in | |
2344 | * file system block size | |
2345 | */ | |
0fc1b451 AK |
2346 | upper_limit = (1LL << 48) - 1; |
2347 | ||
0fc1b451 AK |
2348 | } |
2349 | ||
2350 | /* indirect blocks */ | |
2351 | meta_blocks = 1; | |
2352 | /* double indirect blocks */ | |
2353 | meta_blocks += 1 + (1LL << (bits-2)); | |
2354 | /* tripple indirect blocks */ | |
2355 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2356 | ||
2357 | upper_limit -= meta_blocks; | |
2358 | upper_limit <<= bits; | |
ac27a0ec DK |
2359 | |
2360 | res += 1LL << (bits-2); | |
2361 | res += 1LL << (2*(bits-2)); | |
2362 | res += 1LL << (3*(bits-2)); | |
2363 | res <<= bits; | |
2364 | if (res > upper_limit) | |
2365 | res = upper_limit; | |
0fc1b451 AK |
2366 | |
2367 | if (res > MAX_LFS_FILESIZE) | |
2368 | res = MAX_LFS_FILESIZE; | |
2369 | ||
ac27a0ec DK |
2370 | return res; |
2371 | } | |
2372 | ||
617ba13b | 2373 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2374 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2375 | { |
617ba13b | 2376 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2377 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2378 | int has_super = 0; |
2379 | ||
2380 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2381 | ||
617ba13b | 2382 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2383 | nr < first_meta_bg) |
70bbb3e0 | 2384 | return logical_sb_block + nr + 1; |
ac27a0ec | 2385 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2386 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2387 | has_super = 1; |
0b8e58a1 | 2388 | |
617ba13b | 2389 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2390 | } |
2391 | ||
c9de560d AT |
2392 | /** |
2393 | * ext4_get_stripe_size: Get the stripe size. | |
2394 | * @sbi: In memory super block info | |
2395 | * | |
2396 | * If we have specified it via mount option, then | |
2397 | * use the mount option value. If the value specified at mount time is | |
2398 | * greater than the blocks per group use the super block value. | |
2399 | * If the super block value is greater than blocks per group return 0. | |
2400 | * Allocator needs it be less than blocks per group. | |
2401 | * | |
2402 | */ | |
2403 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2404 | { | |
2405 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2406 | unsigned long stripe_width = | |
2407 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2408 | int ret; |
c9de560d AT |
2409 | |
2410 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2411 | ret = sbi->s_stripe; |
2412 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2413 | ret = stripe_width; | |
2414 | else if (stride <= sbi->s_blocks_per_group) | |
2415 | ret = stride; | |
2416 | else | |
2417 | ret = 0; | |
c9de560d | 2418 | |
3eb08658 DE |
2419 | /* |
2420 | * If the stripe width is 1, this makes no sense and | |
2421 | * we set it to 0 to turn off stripe handling code. | |
2422 | */ | |
2423 | if (ret <= 1) | |
2424 | ret = 0; | |
c9de560d | 2425 | |
3eb08658 | 2426 | return ret; |
c9de560d | 2427 | } |
ac27a0ec | 2428 | |
3197ebdb TT |
2429 | /* sysfs supprt */ |
2430 | ||
2431 | struct ext4_attr { | |
2432 | struct attribute attr; | |
2433 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2434 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2435 | const char *, size_t); |
2436 | int offset; | |
2437 | }; | |
2438 | ||
2439 | static int parse_strtoul(const char *buf, | |
2440 | unsigned long max, unsigned long *value) | |
2441 | { | |
2442 | char *endp; | |
2443 | ||
e7d2860b AGR |
2444 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2445 | endp = skip_spaces(endp); | |
3197ebdb TT |
2446 | if (*endp || *value > max) |
2447 | return -EINVAL; | |
2448 | ||
2449 | return 0; | |
2450 | } | |
2451 | ||
2452 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2453 | struct ext4_sb_info *sbi, | |
2454 | char *buf) | |
2455 | { | |
2456 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2457 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2458 | } | |
2459 | ||
2460 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2461 | struct ext4_sb_info *sbi, char *buf) | |
2462 | { | |
2463 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2464 | ||
f613dfcb TT |
2465 | if (!sb->s_bdev->bd_part) |
2466 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2467 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2468 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2469 | sbi->s_sectors_written_start) >> 1); | |
2470 | } | |
2471 | ||
2472 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2473 | struct ext4_sb_info *sbi, char *buf) | |
2474 | { | |
2475 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2476 | ||
f613dfcb TT |
2477 | if (!sb->s_bdev->bd_part) |
2478 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2479 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2480 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2481 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2482 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2483 | } |
2484 | ||
77f4135f VH |
2485 | static ssize_t extent_cache_hits_show(struct ext4_attr *a, |
2486 | struct ext4_sb_info *sbi, char *buf) | |
2487 | { | |
2488 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); | |
2489 | } | |
2490 | ||
2491 | static ssize_t extent_cache_misses_show(struct ext4_attr *a, | |
2492 | struct ext4_sb_info *sbi, char *buf) | |
2493 | { | |
2494 | return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); | |
2495 | } | |
2496 | ||
3197ebdb TT |
2497 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, |
2498 | struct ext4_sb_info *sbi, | |
2499 | const char *buf, size_t count) | |
2500 | { | |
2501 | unsigned long t; | |
2502 | ||
2503 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2504 | return -EINVAL; | |
2505 | ||
5dbd571d | 2506 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2507 | return -EINVAL; |
2508 | ||
2509 | sbi->s_inode_readahead_blks = t; | |
2510 | return count; | |
2511 | } | |
2512 | ||
2513 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2514 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2515 | { |
2516 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2517 | ||
2518 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2519 | } | |
2520 | ||
2521 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2522 | struct ext4_sb_info *sbi, | |
2523 | const char *buf, size_t count) | |
2524 | { | |
2525 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2526 | unsigned long t; | |
2527 | ||
2528 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2529 | return -EINVAL; | |
2530 | *ui = t; | |
2531 | return count; | |
2532 | } | |
2533 | ||
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); | |
77f4135f VH |
2554 | EXT4_RO_ATTR(extent_cache_hits); |
2555 | EXT4_RO_ATTR(extent_cache_misses); | |
3197ebdb TT |
2556 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2557 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2558 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2559 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2560 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2561 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2562 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2563 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2564 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2565 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
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), | |
77f4135f VH |
2571 | ATTR_LIST(extent_cache_hits), |
2572 | ATTR_LIST(extent_cache_misses), | |
3197ebdb | 2573 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2574 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2575 | ATTR_LIST(mb_stats), |
2576 | ATTR_LIST(mb_max_to_scan), | |
2577 | ATTR_LIST(mb_min_to_scan), | |
2578 | ATTR_LIST(mb_order2_req), | |
2579 | ATTR_LIST(mb_stream_req), | |
2580 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2581 | ATTR_LIST(max_writeback_mb_bump), |
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); |
857ac889 LC |
2588 | |
2589 | static struct attribute *ext4_feat_attrs[] = { | |
2590 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2591 | ATTR_LIST(batched_discard), |
857ac889 LC |
2592 | NULL, |
2593 | }; | |
2594 | ||
3197ebdb TT |
2595 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2596 | struct attribute *attr, char *buf) | |
2597 | { | |
2598 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2599 | s_kobj); | |
2600 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2601 | ||
2602 | return a->show ? a->show(a, sbi, buf) : 0; | |
2603 | } | |
2604 | ||
2605 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2606 | struct attribute *attr, | |
2607 | const char *buf, size_t len) | |
2608 | { | |
2609 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2610 | s_kobj); | |
2611 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2612 | ||
2613 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2614 | } | |
2615 | ||
2616 | static void ext4_sb_release(struct kobject *kobj) | |
2617 | { | |
2618 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2619 | s_kobj); | |
2620 | complete(&sbi->s_kobj_unregister); | |
2621 | } | |
2622 | ||
52cf25d0 | 2623 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2624 | .show = ext4_attr_show, |
2625 | .store = ext4_attr_store, | |
2626 | }; | |
2627 | ||
2628 | static struct kobj_type ext4_ktype = { | |
2629 | .default_attrs = ext4_attrs, | |
2630 | .sysfs_ops = &ext4_attr_ops, | |
2631 | .release = ext4_sb_release, | |
2632 | }; | |
2633 | ||
857ac889 LC |
2634 | static void ext4_feat_release(struct kobject *kobj) |
2635 | { | |
2636 | complete(&ext4_feat->f_kobj_unregister); | |
2637 | } | |
2638 | ||
2639 | static struct kobj_type ext4_feat_ktype = { | |
2640 | .default_attrs = ext4_feat_attrs, | |
2641 | .sysfs_ops = &ext4_attr_ops, | |
2642 | .release = ext4_feat_release, | |
2643 | }; | |
2644 | ||
a13fb1a4 ES |
2645 | /* |
2646 | * Check whether this filesystem can be mounted based on | |
2647 | * the features present and the RDONLY/RDWR mount requested. | |
2648 | * Returns 1 if this filesystem can be mounted as requested, | |
2649 | * 0 if it cannot be. | |
2650 | */ | |
2651 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2652 | { | |
2653 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2654 | ext4_msg(sb, KERN_ERR, | |
2655 | "Couldn't mount because of " | |
2656 | "unsupported optional features (%x)", | |
2657 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2658 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2659 | return 0; | |
2660 | } | |
2661 | ||
2662 | if (readonly) | |
2663 | return 1; | |
2664 | ||
2665 | /* Check that feature set is OK for a read-write mount */ | |
2666 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2667 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2668 | "unsupported optional features (%x)", | |
2669 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2670 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2671 | return 0; | |
2672 | } | |
2673 | /* | |
2674 | * Large file size enabled file system can only be mounted | |
2675 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2676 | */ | |
2677 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2678 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2679 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2680 | "cannot be mounted RDWR without " | |
2681 | "CONFIG_LBDAF"); | |
2682 | return 0; | |
2683 | } | |
2684 | } | |
2685 | return 1; | |
2686 | } | |
2687 | ||
66e61a9e TT |
2688 | /* |
2689 | * This function is called once a day if we have errors logged | |
2690 | * on the file system | |
2691 | */ | |
2692 | static void print_daily_error_info(unsigned long arg) | |
2693 | { | |
2694 | struct super_block *sb = (struct super_block *) arg; | |
2695 | struct ext4_sb_info *sbi; | |
2696 | struct ext4_super_block *es; | |
2697 | ||
2698 | sbi = EXT4_SB(sb); | |
2699 | es = sbi->s_es; | |
2700 | ||
2701 | if (es->s_error_count) | |
2702 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2703 | le32_to_cpu(es->s_error_count)); | |
2704 | if (es->s_first_error_time) { | |
2705 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2706 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2707 | (int) sizeof(es->s_first_error_func), | |
2708 | es->s_first_error_func, | |
2709 | le32_to_cpu(es->s_first_error_line)); | |
2710 | if (es->s_first_error_ino) | |
2711 | printk(": inode %u", | |
2712 | le32_to_cpu(es->s_first_error_ino)); | |
2713 | if (es->s_first_error_block) | |
2714 | printk(": block %llu", (unsigned long long) | |
2715 | le64_to_cpu(es->s_first_error_block)); | |
2716 | printk("\n"); | |
2717 | } | |
2718 | if (es->s_last_error_time) { | |
2719 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2720 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2721 | (int) sizeof(es->s_last_error_func), | |
2722 | es->s_last_error_func, | |
2723 | le32_to_cpu(es->s_last_error_line)); | |
2724 | if (es->s_last_error_ino) | |
2725 | printk(": inode %u", | |
2726 | le32_to_cpu(es->s_last_error_ino)); | |
2727 | if (es->s_last_error_block) | |
2728 | printk(": block %llu", (unsigned long long) | |
2729 | le64_to_cpu(es->s_last_error_block)); | |
2730 | printk("\n"); | |
2731 | } | |
2732 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2733 | } | |
2734 | ||
bfff6873 LC |
2735 | /* Find next suitable group and run ext4_init_inode_table */ |
2736 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2737 | { | |
2738 | struct ext4_group_desc *gdp = NULL; | |
2739 | ext4_group_t group, ngroups; | |
2740 | struct super_block *sb; | |
2741 | unsigned long timeout = 0; | |
2742 | int ret = 0; | |
2743 | ||
2744 | sb = elr->lr_super; | |
2745 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2746 | ||
2747 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2748 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2749 | if (!gdp) { | |
2750 | ret = 1; | |
2751 | break; | |
2752 | } | |
2753 | ||
2754 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2755 | break; | |
2756 | } | |
2757 | ||
2758 | if (group == ngroups) | |
2759 | ret = 1; | |
2760 | ||
2761 | if (!ret) { | |
2762 | timeout = jiffies; | |
2763 | ret = ext4_init_inode_table(sb, group, | |
2764 | elr->lr_timeout ? 0 : 1); | |
2765 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2766 | timeout = (jiffies - timeout) * |
2767 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2768 | elr->lr_timeout = timeout; |
2769 | } | |
2770 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2771 | elr->lr_next_group = group + 1; | |
2772 | } | |
2773 | ||
2774 | return ret; | |
2775 | } | |
2776 | ||
2777 | /* | |
2778 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2779 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2780 | */ |
2781 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2782 | { | |
2783 | struct ext4_sb_info *sbi; | |
2784 | ||
2785 | if (!elr) | |
2786 | return; | |
2787 | ||
2788 | sbi = elr->lr_sbi; | |
2789 | ||
2790 | list_del(&elr->lr_request); | |
2791 | sbi->s_li_request = NULL; | |
2792 | kfree(elr); | |
2793 | } | |
2794 | ||
2795 | static void ext4_unregister_li_request(struct super_block *sb) | |
2796 | { | |
1bb933fb LC |
2797 | mutex_lock(&ext4_li_mtx); |
2798 | if (!ext4_li_info) { | |
2799 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2800 | return; |
1bb933fb | 2801 | } |
bfff6873 LC |
2802 | |
2803 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2804 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2805 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2806 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2807 | } |
2808 | ||
8f1f7453 ES |
2809 | static struct task_struct *ext4_lazyinit_task; |
2810 | ||
bfff6873 LC |
2811 | /* |
2812 | * This is the function where ext4lazyinit thread lives. It walks | |
2813 | * through the request list searching for next scheduled filesystem. | |
2814 | * When such a fs is found, run the lazy initialization request | |
2815 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2816 | * function. Based on that time we compute next schedule time of | |
2817 | * the request. When walking through the list is complete, compute | |
2818 | * next waking time and put itself into sleep. | |
2819 | */ | |
2820 | static int ext4_lazyinit_thread(void *arg) | |
2821 | { | |
2822 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2823 | struct list_head *pos, *n; | |
2824 | struct ext4_li_request *elr; | |
4ed5c033 | 2825 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2826 | |
2827 | BUG_ON(NULL == eli); | |
2828 | ||
bfff6873 LC |
2829 | cont_thread: |
2830 | while (true) { | |
2831 | next_wakeup = MAX_JIFFY_OFFSET; | |
2832 | ||
2833 | mutex_lock(&eli->li_list_mtx); | |
2834 | if (list_empty(&eli->li_request_list)) { | |
2835 | mutex_unlock(&eli->li_list_mtx); | |
2836 | goto exit_thread; | |
2837 | } | |
2838 | ||
2839 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2840 | elr = list_entry(pos, struct ext4_li_request, | |
2841 | lr_request); | |
2842 | ||
b2c78cd0 TT |
2843 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2844 | if (ext4_run_li_request(elr) != 0) { | |
2845 | /* error, remove the lazy_init job */ | |
2846 | ext4_remove_li_request(elr); | |
2847 | continue; | |
2848 | } | |
bfff6873 LC |
2849 | } |
2850 | ||
2851 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2852 | next_wakeup = elr->lr_next_sched; | |
2853 | } | |
2854 | mutex_unlock(&eli->li_list_mtx); | |
2855 | ||
2856 | if (freezing(current)) | |
2857 | refrigerator(); | |
2858 | ||
4ed5c033 LC |
2859 | cur = jiffies; |
2860 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2861 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2862 | cond_resched(); |
2863 | continue; | |
2864 | } | |
2865 | ||
4ed5c033 LC |
2866 | schedule_timeout_interruptible(next_wakeup - cur); |
2867 | ||
8f1f7453 ES |
2868 | if (kthread_should_stop()) { |
2869 | ext4_clear_request_list(); | |
2870 | goto exit_thread; | |
2871 | } | |
bfff6873 LC |
2872 | } |
2873 | ||
2874 | exit_thread: | |
2875 | /* | |
2876 | * It looks like the request list is empty, but we need | |
2877 | * to check it under the li_list_mtx lock, to prevent any | |
2878 | * additions into it, and of course we should lock ext4_li_mtx | |
2879 | * to atomically free the list and ext4_li_info, because at | |
2880 | * this point another ext4 filesystem could be registering | |
2881 | * new one. | |
2882 | */ | |
2883 | mutex_lock(&ext4_li_mtx); | |
2884 | mutex_lock(&eli->li_list_mtx); | |
2885 | if (!list_empty(&eli->li_request_list)) { | |
2886 | mutex_unlock(&eli->li_list_mtx); | |
2887 | mutex_unlock(&ext4_li_mtx); | |
2888 | goto cont_thread; | |
2889 | } | |
2890 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2891 | kfree(ext4_li_info); |
2892 | ext4_li_info = NULL; | |
2893 | mutex_unlock(&ext4_li_mtx); | |
2894 | ||
2895 | return 0; | |
2896 | } | |
2897 | ||
2898 | static void ext4_clear_request_list(void) | |
2899 | { | |
2900 | struct list_head *pos, *n; | |
2901 | struct ext4_li_request *elr; | |
2902 | ||
2903 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2904 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2905 | elr = list_entry(pos, struct ext4_li_request, | |
2906 | lr_request); | |
2907 | ext4_remove_li_request(elr); | |
2908 | } | |
2909 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2910 | } | |
2911 | ||
2912 | static int ext4_run_lazyinit_thread(void) | |
2913 | { | |
8f1f7453 ES |
2914 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2915 | ext4_li_info, "ext4lazyinit"); | |
2916 | if (IS_ERR(ext4_lazyinit_task)) { | |
2917 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2918 | ext4_clear_request_list(); |
bfff6873 LC |
2919 | kfree(ext4_li_info); |
2920 | ext4_li_info = NULL; | |
2921 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2922 | "initialization thread\n", | |
2923 | err); | |
2924 | return err; | |
2925 | } | |
2926 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2927 | return 0; |
2928 | } | |
2929 | ||
2930 | /* | |
2931 | * Check whether it make sense to run itable init. thread or not. | |
2932 | * If there is at least one uninitialized inode table, return | |
2933 | * corresponding group number, else the loop goes through all | |
2934 | * groups and return total number of groups. | |
2935 | */ | |
2936 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2937 | { | |
2938 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2939 | struct ext4_group_desc *gdp = NULL; | |
2940 | ||
2941 | for (group = 0; group < ngroups; group++) { | |
2942 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2943 | if (!gdp) | |
2944 | continue; | |
2945 | ||
2946 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2947 | break; | |
2948 | } | |
2949 | ||
2950 | return group; | |
2951 | } | |
2952 | ||
2953 | static int ext4_li_info_new(void) | |
2954 | { | |
2955 | struct ext4_lazy_init *eli = NULL; | |
2956 | ||
2957 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2958 | if (!eli) | |
2959 | return -ENOMEM; | |
2960 | ||
bfff6873 LC |
2961 | INIT_LIST_HEAD(&eli->li_request_list); |
2962 | mutex_init(&eli->li_list_mtx); | |
2963 | ||
bfff6873 LC |
2964 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2965 | ||
2966 | ext4_li_info = eli; | |
2967 | ||
2968 | return 0; | |
2969 | } | |
2970 | ||
2971 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2972 | ext4_group_t start) | |
2973 | { | |
2974 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2975 | struct ext4_li_request *elr; | |
2976 | unsigned long rnd; | |
2977 | ||
2978 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2979 | if (!elr) | |
2980 | return NULL; | |
2981 | ||
2982 | elr->lr_super = sb; | |
2983 | elr->lr_sbi = sbi; | |
2984 | elr->lr_next_group = start; | |
2985 | ||
2986 | /* | |
2987 | * Randomize first schedule time of the request to | |
2988 | * spread the inode table initialization requests | |
2989 | * better. | |
2990 | */ | |
2991 | get_random_bytes(&rnd, sizeof(rnd)); | |
2992 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2993 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2994 | ||
2995 | return elr; | |
2996 | } | |
2997 | ||
2998 | static int ext4_register_li_request(struct super_block *sb, | |
2999 | ext4_group_t first_not_zeroed) | |
3000 | { | |
3001 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3002 | struct ext4_li_request *elr; | |
3003 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 3004 | int ret = 0; |
bfff6873 | 3005 | |
51ce6511 LC |
3006 | if (sbi->s_li_request != NULL) { |
3007 | /* | |
3008 | * Reset timeout so it can be computed again, because | |
3009 | * s_li_wait_mult might have changed. | |
3010 | */ | |
3011 | sbi->s_li_request->lr_timeout = 0; | |
beed5ecb | 3012 | return 0; |
51ce6511 | 3013 | } |
bfff6873 LC |
3014 | |
3015 | if (first_not_zeroed == ngroups || | |
3016 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3017 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 3018 | return 0; |
bfff6873 LC |
3019 | |
3020 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
3021 | if (!elr) |
3022 | return -ENOMEM; | |
bfff6873 LC |
3023 | |
3024 | mutex_lock(&ext4_li_mtx); | |
3025 | ||
3026 | if (NULL == ext4_li_info) { | |
3027 | ret = ext4_li_info_new(); | |
3028 | if (ret) | |
3029 | goto out; | |
3030 | } | |
3031 | ||
3032 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3033 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3034 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3035 | ||
3036 | sbi->s_li_request = elr; | |
46e4690b TM |
3037 | /* |
3038 | * set elr to NULL here since it has been inserted to | |
3039 | * the request_list and the removal and free of it is | |
3040 | * handled by ext4_clear_request_list from now on. | |
3041 | */ | |
3042 | elr = NULL; | |
bfff6873 LC |
3043 | |
3044 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3045 | ret = ext4_run_lazyinit_thread(); | |
3046 | if (ret) | |
3047 | goto out; | |
3048 | } | |
bfff6873 | 3049 | out: |
beed5ecb NK |
3050 | mutex_unlock(&ext4_li_mtx); |
3051 | if (ret) | |
bfff6873 | 3052 | kfree(elr); |
bfff6873 LC |
3053 | return ret; |
3054 | } | |
3055 | ||
3056 | /* | |
3057 | * We do not need to lock anything since this is called on | |
3058 | * module unload. | |
3059 | */ | |
3060 | static void ext4_destroy_lazyinit_thread(void) | |
3061 | { | |
3062 | /* | |
3063 | * If thread exited earlier | |
3064 | * there's nothing to be done. | |
3065 | */ | |
8f1f7453 | 3066 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3067 | return; |
3068 | ||
8f1f7453 | 3069 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3070 | } |
3071 | ||
2b2d6d01 | 3072 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
3073 | __releases(kernel_lock) |
3074 | __acquires(kernel_lock) | |
ac27a0ec | 3075 | { |
d4c402d9 | 3076 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3077 | struct buffer_head *bh; |
617ba13b MC |
3078 | struct ext4_super_block *es = NULL; |
3079 | struct ext4_sb_info *sbi; | |
3080 | ext4_fsblk_t block; | |
3081 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3082 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3083 | unsigned long offset = 0; |
ac27a0ec DK |
3084 | unsigned long journal_devnum = 0; |
3085 | unsigned long def_mount_opts; | |
3086 | struct inode *root; | |
9f6200bb | 3087 | char *cp; |
0390131b | 3088 | const char *descr; |
dcc7dae3 | 3089 | int ret = -ENOMEM; |
ac27a0ec | 3090 | int blocksize; |
4ec11028 TT |
3091 | unsigned int db_count; |
3092 | unsigned int i; | |
f287a1a5 | 3093 | int needs_recovery, has_huge_files; |
bd81d8ee | 3094 | __u64 blocks_count; |
833f4077 | 3095 | int err; |
b3881f74 | 3096 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3097 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3098 | |
3099 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3100 | if (!sbi) | |
dcc7dae3 | 3101 | goto out_free_orig; |
705895b6 PE |
3102 | |
3103 | sbi->s_blockgroup_lock = | |
3104 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3105 | if (!sbi->s_blockgroup_lock) { | |
3106 | kfree(sbi); | |
dcc7dae3 | 3107 | goto out_free_orig; |
705895b6 | 3108 | } |
ac27a0ec DK |
3109 | sb->s_fs_info = sbi; |
3110 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3111 | sbi->s_resuid = EXT4_DEF_RESUID; |
3112 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3113 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3114 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3115 | if (sb->s_bdev->bd_part) |
3116 | sbi->s_sectors_written_start = | |
3117 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3118 | |
9f6200bb TT |
3119 | /* Cleanup superblock name */ |
3120 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3121 | *cp = '!'; | |
3122 | ||
dcc7dae3 | 3123 | ret = -EINVAL; |
617ba13b | 3124 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3125 | if (!blocksize) { |
b31e1552 | 3126 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3127 | goto out_fail; |
3128 | } | |
3129 | ||
3130 | /* | |
617ba13b | 3131 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3132 | * block sizes. We need to calculate the offset from buffer start. |
3133 | */ | |
617ba13b | 3134 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3135 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3136 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3137 | } else { |
70bbb3e0 | 3138 | logical_sb_block = sb_block; |
ac27a0ec DK |
3139 | } |
3140 | ||
70bbb3e0 | 3141 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3142 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3143 | goto out_fail; |
3144 | } | |
3145 | /* | |
3146 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3147 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3148 | */ |
617ba13b | 3149 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3150 | sbi->s_es = es; |
3151 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3152 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3153 | goto cantfind_ext4; | |
afc32f7e | 3154 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3155 | |
3156 | /* Set defaults before we parse the mount options */ | |
3157 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3158 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3159 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3160 | set_opt(sb, DEBUG); |
437ca0fd DM |
3161 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3162 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3163 | "2.6.38"); | |
fd8c37ec | 3164 | set_opt(sb, GRPID); |
437ca0fd | 3165 | } |
617ba13b | 3166 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3167 | set_opt(sb, NO_UID32); |
ea663336 | 3168 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3169 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3170 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3171 | #endif |
03010a33 | 3172 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3173 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3174 | #endif |
6fd7a467 | 3175 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3176 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3177 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3178 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3179 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3180 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3181 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3182 | |
3183 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3184 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3185 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3186 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3187 | else |
fd8c37ec | 3188 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3189 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3190 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3191 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3192 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3193 | |
3194 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3195 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3196 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3197 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3198 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3199 | |
8b67f04a | 3200 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3201 | set_opt(sb, BARRIER); |
ac27a0ec | 3202 | |
dd919b98 AK |
3203 | /* |
3204 | * enable delayed allocation by default | |
3205 | * Use -o nodelalloc to turn it off | |
3206 | */ | |
8b67f04a TT |
3207 | if (!IS_EXT3_SB(sb) && |
3208 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3209 | set_opt(sb, DELALLOC); |
dd919b98 | 3210 | |
51ce6511 LC |
3211 | /* |
3212 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3213 | * no mount option specified. | |
3214 | */ | |
3215 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3216 | ||
8b67f04a TT |
3217 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3218 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3219 | ext4_msg(sb, KERN_WARNING, | |
3220 | "failed to parse options in superblock: %s", | |
3221 | sbi->s_es->s_mount_opts); | |
3222 | } | |
b3881f74 TT |
3223 | if (!parse_options((char *) data, sb, &journal_devnum, |
3224 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3225 | goto failed_mount; |
3226 | ||
3227 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3228 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3229 | |
617ba13b MC |
3230 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3231 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3232 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3233 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3234 | ext4_msg(sb, KERN_WARNING, |
3235 | "feature flags set on rev 0 fs, " | |
3236 | "running e2fsck is recommended"); | |
469108ff | 3237 | |
2035e776 TT |
3238 | if (IS_EXT2_SB(sb)) { |
3239 | if (ext2_feature_set_ok(sb)) | |
3240 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3241 | "using the ext4 subsystem"); | |
3242 | else { | |
3243 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3244 | "to feature incompatibilities"); | |
3245 | goto failed_mount; | |
3246 | } | |
3247 | } | |
3248 | ||
3249 | if (IS_EXT3_SB(sb)) { | |
3250 | if (ext3_feature_set_ok(sb)) | |
3251 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3252 | "using the ext4 subsystem"); | |
3253 | else { | |
3254 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3255 | "to feature incompatibilities"); | |
3256 | goto failed_mount; | |
3257 | } | |
3258 | } | |
3259 | ||
ac27a0ec DK |
3260 | /* |
3261 | * Check feature flags regardless of the revision level, since we | |
3262 | * previously didn't change the revision level when setting the flags, | |
3263 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3264 | */ | |
a13fb1a4 | 3265 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3266 | goto failed_mount; |
a13fb1a4 | 3267 | |
ac27a0ec DK |
3268 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
3269 | ||
617ba13b MC |
3270 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3271 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3272 | ext4_msg(sb, KERN_ERR, |
3273 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3274 | goto failed_mount; |
3275 | } | |
3276 | ||
ac27a0ec | 3277 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3278 | /* Validate the filesystem blocksize */ |
3279 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3280 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3281 | blocksize); |
ac27a0ec DK |
3282 | goto failed_mount; |
3283 | } | |
3284 | ||
2b2d6d01 | 3285 | brelse(bh); |
70bbb3e0 AM |
3286 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3287 | offset = do_div(logical_sb_block, blocksize); | |
3288 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3289 | if (!bh) { |
b31e1552 ES |
3290 | ext4_msg(sb, KERN_ERR, |
3291 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3292 | goto failed_mount; |
3293 | } | |
617ba13b | 3294 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3295 | sbi->s_es = es; |
617ba13b | 3296 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3297 | ext4_msg(sb, KERN_ERR, |
3298 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3299 | goto failed_mount; |
3300 | } | |
3301 | } | |
3302 | ||
a13fb1a4 ES |
3303 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3304 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3305 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3306 | has_huge_files); | |
3307 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3308 | |
617ba13b MC |
3309 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3310 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3311 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3312 | } else { |
3313 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3314 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3315 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3316 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3317 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3318 | ext4_msg(sb, KERN_ERR, |
3319 | "unsupported inode size: %d", | |
2b2d6d01 | 3320 | sbi->s_inode_size); |
ac27a0ec DK |
3321 | goto failed_mount; |
3322 | } | |
ef7f3835 KS |
3323 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3324 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3325 | } |
0b8e58a1 | 3326 | |
0d1ee42f AR |
3327 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3328 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3329 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3330 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3331 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3332 | ext4_msg(sb, KERN_ERR, |
3333 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3334 | sbi->s_desc_size); |
3335 | goto failed_mount; | |
3336 | } | |
3337 | } else | |
3338 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3339 | |
ac27a0ec | 3340 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3341 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3342 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3343 | goto cantfind_ext4; |
0b8e58a1 | 3344 | |
617ba13b | 3345 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3346 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3347 | goto cantfind_ext4; |
ac27a0ec DK |
3348 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3349 | sbi->s_inodes_per_block; | |
0d1ee42f | 3350 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3351 | sbi->s_sbh = bh; |
3352 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3353 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3354 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3355 | |
2b2d6d01 | 3356 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3357 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3358 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3359 | i = le32_to_cpu(es->s_flags); |
3360 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3361 | sbi->s_hash_unsigned = 3; | |
3362 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3363 | #ifdef __CHAR_UNSIGNED__ | |
3364 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3365 | sbi->s_hash_unsigned = 3; | |
3366 | #else | |
3367 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3368 | #endif | |
3369 | sb->s_dirt = 1; | |
3370 | } | |
ac27a0ec DK |
3371 | |
3372 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
3373 | ext4_msg(sb, KERN_ERR, |
3374 | "#blocks per group too big: %lu", | |
2b2d6d01 | 3375 | sbi->s_blocks_per_group); |
ac27a0ec DK |
3376 | goto failed_mount; |
3377 | } | |
ac27a0ec | 3378 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3379 | ext4_msg(sb, KERN_ERR, |
3380 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3381 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3382 | goto failed_mount; |
3383 | } | |
3384 | ||
bf43d84b ES |
3385 | /* |
3386 | * Test whether we have more sectors than will fit in sector_t, | |
3387 | * and whether the max offset is addressable by the page cache. | |
3388 | */ | |
5a9ae68a | 3389 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3390 | ext4_blocks_count(es)); |
5a9ae68a | 3391 | if (err) { |
b31e1552 | 3392 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3393 | " too large to mount safely on this system"); |
ac27a0ec | 3394 | if (sizeof(sector_t) < 8) |
90c699a9 | 3395 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3396 | ret = err; |
ac27a0ec DK |
3397 | goto failed_mount; |
3398 | } | |
3399 | ||
617ba13b MC |
3400 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3401 | goto cantfind_ext4; | |
e7c95593 | 3402 | |
0f2ddca6 FTN |
3403 | /* check blocks count against device size */ |
3404 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3405 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3406 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3407 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3408 | ext4_blocks_count(es), blocks_count); |
3409 | goto failed_mount; | |
3410 | } | |
3411 | ||
0b8e58a1 AD |
3412 | /* |
3413 | * It makes no sense for the first data block to be beyond the end | |
3414 | * of the filesystem. | |
3415 | */ | |
3416 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3417 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3418 | "block %u is beyond end of filesystem (%llu)", | |
3419 | le32_to_cpu(es->s_first_data_block), | |
3420 | ext4_blocks_count(es)); | |
e7c95593 ES |
3421 | goto failed_mount; |
3422 | } | |
bd81d8ee LV |
3423 | blocks_count = (ext4_blocks_count(es) - |
3424 | le32_to_cpu(es->s_first_data_block) + | |
3425 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3426 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3427 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3428 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3429 | "(block count %llu, first data block %u, " |
b31e1552 | 3430 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3431 | ext4_blocks_count(es), |
3432 | le32_to_cpu(es->s_first_data_block), | |
3433 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3434 | goto failed_mount; | |
3435 | } | |
bd81d8ee | 3436 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3437 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3438 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3439 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3440 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3441 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3442 | sizeof(struct buffer_head *), | |
3443 | GFP_KERNEL); | |
ac27a0ec | 3444 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3445 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3446 | goto failed_mount; |
3447 | } | |
3448 | ||
3244fcb1 | 3449 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
3450 | if (ext4_proc_root) |
3451 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 3452 | #endif |
240799cd | 3453 | |
705895b6 | 3454 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3455 | |
3456 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3457 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3458 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3459 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3460 | ext4_msg(sb, KERN_ERR, |
3461 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3462 | db_count = i; |
3463 | goto failed_mount2; | |
3464 | } | |
3465 | } | |
bfff6873 | 3466 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3467 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3468 | goto failed_mount2; |
3469 | } | |
772cb7c8 JS |
3470 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3471 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3472 | ext4_msg(sb, KERN_ERR, |
3473 | "unable to initialize " | |
3474 | "flex_bg meta info!"); | |
772cb7c8 JS |
3475 | goto failed_mount2; |
3476 | } | |
3477 | ||
ac27a0ec DK |
3478 | sbi->s_gdb_count = db_count; |
3479 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3480 | spin_lock_init(&sbi->s_next_gen_lock); | |
3481 | ||
04496411 TM |
3482 | init_timer(&sbi->s_err_report); |
3483 | sbi->s_err_report.function = print_daily_error_info; | |
3484 | sbi->s_err_report.data = (unsigned long) sb; | |
3485 | ||
ce7e010a TT |
3486 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
3487 | ext4_count_free_blocks(sb)); | |
3488 | if (!err) { | |
3489 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3490 | ext4_count_free_inodes(sb)); | |
3491 | } | |
3492 | if (!err) { | |
3493 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3494 | ext4_count_dirs(sb)); | |
3495 | } | |
3496 | if (!err) { | |
3497 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
3498 | } | |
3499 | if (err) { | |
3500 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3501 | goto failed_mount3; | |
3502 | } | |
3503 | ||
c9de560d | 3504 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3505 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3506 | |
ac27a0ec DK |
3507 | /* |
3508 | * set up enough so that it can read an inode | |
3509 | */ | |
9ca92389 TT |
3510 | if (!test_opt(sb, NOLOAD) && |
3511 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3512 | sb->s_op = &ext4_sops; | |
3513 | else | |
3514 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3515 | sb->s_export_op = &ext4_export_ops; |
3516 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3517 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3518 | sb->s_qcop = &ext4_qctl_operations; |
3519 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec | 3520 | #endif |
f2fa2ffc AK |
3521 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3522 | ||
ac27a0ec | 3523 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3524 | mutex_init(&sbi->s_orphan_lock); |
8f82f840 | 3525 | sbi->s_resize_flags = 0; |
ac27a0ec DK |
3526 | |
3527 | sb->s_root = NULL; | |
3528 | ||
3529 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3530 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3531 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3532 | |
c5e06d10 JL |
3533 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3534 | !(sb->s_flags & MS_RDONLY)) | |
3535 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3536 | goto failed_mount3; | |
3537 | ||
ac27a0ec DK |
3538 | /* |
3539 | * The first inode we look at is the journal inode. Don't try | |
3540 | * root first: it may be modified in the journal! | |
3541 | */ | |
3542 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3543 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3544 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3545 | goto failed_mount3; |
0390131b FM |
3546 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3547 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3548 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3549 | "suppressed and not mounted read-only"); | |
744692dc | 3550 | goto failed_mount_wq; |
ac27a0ec | 3551 | } else { |
fd8c37ec | 3552 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3553 | sbi->s_journal = NULL; |
3554 | needs_recovery = 0; | |
3555 | goto no_journal; | |
ac27a0ec DK |
3556 | } |
3557 | ||
eb40a09c JS |
3558 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3559 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3560 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3561 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3562 | goto failed_mount_wq; |
eb40a09c JS |
3563 | } |
3564 | ||
d4da6c9c LT |
3565 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3566 | jbd2_journal_set_features(sbi->s_journal, | |
3567 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3568 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3569 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3570 | jbd2_journal_set_features(sbi->s_journal, | |
3571 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3572 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3573 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3574 | } else { |
3575 | jbd2_journal_clear_features(sbi->s_journal, | |
3576 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3577 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3578 | } | |
818d276c | 3579 | |
ac27a0ec DK |
3580 | /* We have now updated the journal if required, so we can |
3581 | * validate the data journaling mode. */ | |
3582 | switch (test_opt(sb, DATA_FLAGS)) { | |
3583 | case 0: | |
3584 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3585 | * capabilities: ORDERED_DATA if the journal can |
3586 | * cope, else JOURNAL_DATA | |
3587 | */ | |
dab291af MC |
3588 | if (jbd2_journal_check_available_features |
3589 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3590 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3591 | else |
fd8c37ec | 3592 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3593 | break; |
3594 | ||
617ba13b MC |
3595 | case EXT4_MOUNT_ORDERED_DATA: |
3596 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3597 | if (!jbd2_journal_check_available_features |
3598 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3599 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3600 | "requested data journaling mode"); | |
744692dc | 3601 | goto failed_mount_wq; |
ac27a0ec DK |
3602 | } |
3603 | default: | |
3604 | break; | |
3605 | } | |
b3881f74 | 3606 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3607 | |
ce7e010a TT |
3608 | /* |
3609 | * The journal may have updated the bg summary counts, so we | |
3610 | * need to update the global counters. | |
3611 | */ | |
3612 | percpu_counter_set(&sbi->s_freeblocks_counter, | |
3613 | ext4_count_free_blocks(sb)); | |
3614 | percpu_counter_set(&sbi->s_freeinodes_counter, | |
3615 | ext4_count_free_inodes(sb)); | |
3616 | percpu_counter_set(&sbi->s_dirs_counter, | |
3617 | ext4_count_dirs(sb)); | |
3618 | percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); | |
206f7ab4 | 3619 | |
ce7e010a | 3620 | no_journal: |
fd89d5f2 TH |
3621 | /* |
3622 | * The maximum number of concurrent works can be high and | |
3623 | * concurrency isn't really necessary. Limit it to 1. | |
3624 | */ | |
3625 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3626 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3627 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3628 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3629 | goto failed_mount_wq; | |
3630 | } | |
3631 | ||
ac27a0ec | 3632 | /* |
dab291af | 3633 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3634 | * so we can safely mount the rest of the filesystem now. |
3635 | */ | |
3636 | ||
1d1fe1ee DH |
3637 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3638 | if (IS_ERR(root)) { | |
b31e1552 | 3639 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3640 | ret = PTR_ERR(root); |
32a9bb57 | 3641 | root = NULL; |
ac27a0ec DK |
3642 | goto failed_mount4; |
3643 | } | |
3644 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3645 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3646 | goto failed_mount4; |
3647 | } | |
1d1fe1ee DH |
3648 | sb->s_root = d_alloc_root(root); |
3649 | if (!sb->s_root) { | |
b31e1552 | 3650 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3651 | ret = -ENOMEM; |
3652 | goto failed_mount4; | |
3653 | } | |
ac27a0ec | 3654 | |
2b2d6d01 | 3655 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3656 | |
3657 | /* determine the minimum size of new large inodes, if present */ | |
3658 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3659 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3660 | EXT4_GOOD_OLD_INODE_SIZE; | |
3661 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3662 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3663 | if (sbi->s_want_extra_isize < | |
3664 | le16_to_cpu(es->s_want_extra_isize)) | |
3665 | sbi->s_want_extra_isize = | |
3666 | le16_to_cpu(es->s_want_extra_isize); | |
3667 | if (sbi->s_want_extra_isize < | |
3668 | le16_to_cpu(es->s_min_extra_isize)) | |
3669 | sbi->s_want_extra_isize = | |
3670 | le16_to_cpu(es->s_min_extra_isize); | |
3671 | } | |
3672 | } | |
3673 | /* Check if enough inode space is available */ | |
3674 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3675 | sbi->s_inode_size) { | |
3676 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3677 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3678 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3679 | "available"); | |
ef7f3835 KS |
3680 | } |
3681 | ||
90576c0b TT |
3682 | if (test_opt(sb, DELALLOC) && |
3683 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
3684 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
3685 | "requested data journaling mode"); | |
fd8c37ec | 3686 | clear_opt(sb, DELALLOC); |
90576c0b | 3687 | } |
744692dc JZ |
3688 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
3689 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
3690 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3691 | "option - requested data journaling mode"); | |
fd8c37ec | 3692 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3693 | } |
3694 | if (sb->s_blocksize < PAGE_SIZE) { | |
3695 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3696 | "option - block size is too small"); | |
fd8c37ec | 3697 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3698 | } |
3699 | } | |
c2774d84 | 3700 | |
6fd058f7 TT |
3701 | err = ext4_setup_system_zone(sb); |
3702 | if (err) { | |
b31e1552 | 3703 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3704 | "zone (%d)", err); |
6fd058f7 TT |
3705 | goto failed_mount4; |
3706 | } | |
3707 | ||
c2774d84 AK |
3708 | ext4_ext_init(sb); |
3709 | err = ext4_mb_init(sb, needs_recovery); | |
3710 | if (err) { | |
421f91d2 | 3711 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3712 | err); |
c2774d84 AK |
3713 | goto failed_mount4; |
3714 | } | |
3715 | ||
bfff6873 LC |
3716 | err = ext4_register_li_request(sb, first_not_zeroed); |
3717 | if (err) | |
3718 | goto failed_mount4; | |
3719 | ||
3197ebdb TT |
3720 | sbi->s_kobj.kset = ext4_kset; |
3721 | init_completion(&sbi->s_kobj_unregister); | |
3722 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3723 | "%s", sb->s_id); | |
3724 | if (err) { | |
3725 | ext4_mb_release(sb); | |
3726 | ext4_ext_release(sb); | |
3727 | goto failed_mount4; | |
3728 | }; | |
3729 | ||
617ba13b MC |
3730 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3731 | ext4_orphan_cleanup(sb, es); | |
3732 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3733 | if (needs_recovery) { |
b31e1552 | 3734 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3735 | ext4_mark_recovery_complete(sb, es); |
3736 | } | |
3737 | if (EXT4_SB(sb)->s_journal) { | |
3738 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3739 | descr = " journalled data mode"; | |
3740 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3741 | descr = " ordered data mode"; | |
3742 | else | |
3743 | descr = " writeback data mode"; | |
3744 | } else | |
3745 | descr = "out journal"; | |
3746 | ||
d4c402d9 | 3747 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3748 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3749 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3750 | |
66e61a9e TT |
3751 | if (es->s_error_count) |
3752 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3753 | |
d4c402d9 | 3754 | kfree(orig_data); |
ac27a0ec DK |
3755 | return 0; |
3756 | ||
617ba13b | 3757 | cantfind_ext4: |
ac27a0ec | 3758 | if (!silent) |
b31e1552 | 3759 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3760 | goto failed_mount; |
3761 | ||
3762 | failed_mount4: | |
32a9bb57 MK |
3763 | iput(root); |
3764 | sb->s_root = NULL; | |
b31e1552 | 3765 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3766 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3767 | failed_mount_wq: | |
6fd058f7 | 3768 | ext4_release_system_zone(sb); |
0390131b FM |
3769 | if (sbi->s_journal) { |
3770 | jbd2_journal_destroy(sbi->s_journal); | |
3771 | sbi->s_journal = NULL; | |
3772 | } | |
ac27a0ec | 3773 | failed_mount3: |
04496411 | 3774 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
3775 | if (sbi->s_flex_groups) |
3776 | ext4_kvfree(sbi->s_flex_groups); | |
ce7e010a TT |
3777 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3778 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3779 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3780 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
c5e06d10 JL |
3781 | if (sbi->s_mmp_tsk) |
3782 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
3783 | failed_mount2: |
3784 | for (i = 0; i < db_count; i++) | |
3785 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 3786 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 3787 | failed_mount: |
240799cd | 3788 | if (sbi->s_proc) { |
9f6200bb | 3789 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3790 | } |
ac27a0ec DK |
3791 | #ifdef CONFIG_QUOTA |
3792 | for (i = 0; i < MAXQUOTAS; i++) | |
3793 | kfree(sbi->s_qf_names[i]); | |
3794 | #endif | |
617ba13b | 3795 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3796 | brelse(bh); |
3797 | out_fail: | |
3798 | sb->s_fs_info = NULL; | |
f6830165 | 3799 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3800 | kfree(sbi); |
dcc7dae3 | 3801 | out_free_orig: |
d4c402d9 | 3802 | kfree(orig_data); |
1d1fe1ee | 3803 | return ret; |
ac27a0ec DK |
3804 | } |
3805 | ||
3806 | /* | |
3807 | * Setup any per-fs journal parameters now. We'll do this both on | |
3808 | * initial mount, once the journal has been initialised but before we've | |
3809 | * done any recovery; and again on any subsequent remount. | |
3810 | */ | |
617ba13b | 3811 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3812 | { |
617ba13b | 3813 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3814 | |
30773840 TT |
3815 | journal->j_commit_interval = sbi->s_commit_interval; |
3816 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3817 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3818 | |
a931da6a | 3819 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3820 | if (test_opt(sb, BARRIER)) |
dab291af | 3821 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3822 | else |
dab291af | 3823 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3824 | if (test_opt(sb, DATA_ERR_ABORT)) |
3825 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3826 | else | |
3827 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3828 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3829 | } |
3830 | ||
617ba13b | 3831 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3832 | unsigned int journal_inum) |
3833 | { | |
3834 | struct inode *journal_inode; | |
3835 | journal_t *journal; | |
3836 | ||
0390131b FM |
3837 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3838 | ||
ac27a0ec DK |
3839 | /* First, test for the existence of a valid inode on disk. Bad |
3840 | * things happen if we iget() an unused inode, as the subsequent | |
3841 | * iput() will try to delete it. */ | |
3842 | ||
1d1fe1ee DH |
3843 | journal_inode = ext4_iget(sb, journal_inum); |
3844 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3845 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3846 | return NULL; |
3847 | } | |
3848 | if (!journal_inode->i_nlink) { | |
3849 | make_bad_inode(journal_inode); | |
3850 | iput(journal_inode); | |
b31e1552 | 3851 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3852 | return NULL; |
3853 | } | |
3854 | ||
e5f8eab8 | 3855 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3856 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3857 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3858 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3859 | iput(journal_inode); |
3860 | return NULL; | |
3861 | } | |
3862 | ||
dab291af | 3863 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3864 | if (!journal) { |
b31e1552 | 3865 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3866 | iput(journal_inode); |
3867 | return NULL; | |
3868 | } | |
3869 | journal->j_private = sb; | |
617ba13b | 3870 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3871 | return journal; |
3872 | } | |
3873 | ||
617ba13b | 3874 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3875 | dev_t j_dev) |
3876 | { | |
2b2d6d01 | 3877 | struct buffer_head *bh; |
ac27a0ec | 3878 | journal_t *journal; |
617ba13b MC |
3879 | ext4_fsblk_t start; |
3880 | ext4_fsblk_t len; | |
ac27a0ec | 3881 | int hblock, blocksize; |
617ba13b | 3882 | ext4_fsblk_t sb_block; |
ac27a0ec | 3883 | unsigned long offset; |
2b2d6d01 | 3884 | struct ext4_super_block *es; |
ac27a0ec DK |
3885 | struct block_device *bdev; |
3886 | ||
0390131b FM |
3887 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3888 | ||
b31e1552 | 3889 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3890 | if (bdev == NULL) |
3891 | return NULL; | |
3892 | ||
ac27a0ec | 3893 | blocksize = sb->s_blocksize; |
e1defc4f | 3894 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3895 | if (blocksize < hblock) { |
b31e1552 ES |
3896 | ext4_msg(sb, KERN_ERR, |
3897 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3898 | goto out_bdev; |
3899 | } | |
3900 | ||
617ba13b MC |
3901 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3902 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3903 | set_blocksize(bdev, blocksize); |
3904 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3905 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3906 | "external journal"); | |
ac27a0ec DK |
3907 | goto out_bdev; |
3908 | } | |
3909 | ||
617ba13b MC |
3910 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3911 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3912 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3913 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3914 | ext4_msg(sb, KERN_ERR, "external journal has " |
3915 | "bad superblock"); | |
ac27a0ec DK |
3916 | brelse(bh); |
3917 | goto out_bdev; | |
3918 | } | |
3919 | ||
617ba13b | 3920 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3921 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3922 | brelse(bh); |
3923 | goto out_bdev; | |
3924 | } | |
3925 | ||
bd81d8ee | 3926 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3927 | start = sb_block + 1; |
3928 | brelse(bh); /* we're done with the superblock */ | |
3929 | ||
dab291af | 3930 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3931 | start, len, blocksize); |
3932 | if (!journal) { | |
b31e1552 | 3933 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3934 | goto out_bdev; |
3935 | } | |
3936 | journal->j_private = sb; | |
3937 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3938 | wait_on_buffer(journal->j_sb_buffer); | |
3939 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3940 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3941 | goto out_journal; |
3942 | } | |
3943 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3944 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3945 | "user (unsupported) - %d", | |
ac27a0ec DK |
3946 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3947 | goto out_journal; | |
3948 | } | |
617ba13b MC |
3949 | EXT4_SB(sb)->journal_bdev = bdev; |
3950 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3951 | return journal; |
0b8e58a1 | 3952 | |
ac27a0ec | 3953 | out_journal: |
dab291af | 3954 | jbd2_journal_destroy(journal); |
ac27a0ec | 3955 | out_bdev: |
617ba13b | 3956 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3957 | return NULL; |
3958 | } | |
3959 | ||
617ba13b MC |
3960 | static int ext4_load_journal(struct super_block *sb, |
3961 | struct ext4_super_block *es, | |
ac27a0ec DK |
3962 | unsigned long journal_devnum) |
3963 | { | |
3964 | journal_t *journal; | |
3965 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3966 | dev_t journal_dev; | |
3967 | int err = 0; | |
3968 | int really_read_only; | |
3969 | ||
0390131b FM |
3970 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3971 | ||
ac27a0ec DK |
3972 | if (journal_devnum && |
3973 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3974 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3975 | "numbers have changed"); | |
ac27a0ec DK |
3976 | journal_dev = new_decode_dev(journal_devnum); |
3977 | } else | |
3978 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3979 | ||
3980 | really_read_only = bdev_read_only(sb->s_bdev); | |
3981 | ||
3982 | /* | |
3983 | * Are we loading a blank journal or performing recovery after a | |
3984 | * crash? For recovery, we need to check in advance whether we | |
3985 | * can get read-write access to the device. | |
3986 | */ | |
617ba13b | 3987 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3988 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3989 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3990 | "required on readonly filesystem"); | |
ac27a0ec | 3991 | if (really_read_only) { |
b31e1552 ES |
3992 | ext4_msg(sb, KERN_ERR, "write access " |
3993 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3994 | return -EROFS; |
3995 | } | |
b31e1552 ES |
3996 | ext4_msg(sb, KERN_INFO, "write access will " |
3997 | "be enabled during recovery"); | |
ac27a0ec DK |
3998 | } |
3999 | } | |
4000 | ||
4001 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4002 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4003 | "and inode journals!"); | |
ac27a0ec DK |
4004 | return -EINVAL; |
4005 | } | |
4006 | ||
4007 | if (journal_inum) { | |
617ba13b | 4008 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4009 | return -EINVAL; |
4010 | } else { | |
617ba13b | 4011 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4012 | return -EINVAL; |
4013 | } | |
4014 | ||
90576c0b | 4015 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4016 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4017 | |
ac27a0ec | 4018 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 4019 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 4020 | if (err) { |
b31e1552 | 4021 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 4022 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4023 | return err; |
4024 | } | |
4025 | } | |
4026 | ||
617ba13b | 4027 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4028 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4029 | if (!err) { |
4030 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4031 | if (save) | |
4032 | memcpy(save, ((char *) es) + | |
4033 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4034 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4035 | if (save) |
4036 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4037 | save, EXT4_S_ERR_LEN); | |
4038 | kfree(save); | |
4039 | } | |
ac27a0ec DK |
4040 | |
4041 | if (err) { | |
b31e1552 | 4042 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4043 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4044 | return err; |
4045 | } | |
4046 | ||
617ba13b MC |
4047 | EXT4_SB(sb)->s_journal = journal; |
4048 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4049 | |
c41303ce | 4050 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4051 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4052 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4053 | |
4054 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4055 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4056 | } |
4057 | ||
4058 | return 0; | |
4059 | } | |
4060 | ||
e2d67052 | 4061 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4062 | { |
e2d67052 | 4063 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4064 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4065 | int error = 0; |
ac27a0ec DK |
4066 | |
4067 | if (!sbh) | |
c4be0c1d | 4068 | return error; |
914258bf TT |
4069 | if (buffer_write_io_error(sbh)) { |
4070 | /* | |
4071 | * Oh, dear. A previous attempt to write the | |
4072 | * superblock failed. This could happen because the | |
4073 | * USB device was yanked out. Or it could happen to | |
4074 | * be a transient write error and maybe the block will | |
4075 | * be remapped. Nothing we can do but to retry the | |
4076 | * write and hope for the best. | |
4077 | */ | |
b31e1552 ES |
4078 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4079 | "superblock detected"); | |
914258bf TT |
4080 | clear_buffer_write_io_error(sbh); |
4081 | set_buffer_uptodate(sbh); | |
4082 | } | |
71290b36 TT |
4083 | /* |
4084 | * If the file system is mounted read-only, don't update the | |
4085 | * superblock write time. This avoids updating the superblock | |
4086 | * write time when we are mounting the root file system | |
4087 | * read/only but we need to replay the journal; at that point, | |
4088 | * for people who are east of GMT and who make their clock | |
4089 | * tick in localtime for Windows bug-for-bug compatibility, | |
4090 | * the clock is set in the future, and this will cause e2fsck | |
4091 | * to complain and force a full file system check. | |
4092 | */ | |
4093 | if (!(sb->s_flags & MS_RDONLY)) | |
4094 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4095 | if (sb->s_bdev->bd_part) |
4096 | es->s_kbytes_written = | |
4097 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4098 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4099 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4100 | else |
4101 | es->s_kbytes_written = | |
4102 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
ce7e010a TT |
4103 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
4104 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
4105 | es->s_free_inodes_count = | |
4106 | cpu_to_le32(percpu_counter_sum_positive( | |
4107 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4108 | sb->s_dirt = 0; |
ac27a0ec DK |
4109 | BUFFER_TRACE(sbh, "marking dirty"); |
4110 | mark_buffer_dirty(sbh); | |
914258bf | 4111 | if (sync) { |
c4be0c1d TS |
4112 | error = sync_dirty_buffer(sbh); |
4113 | if (error) | |
4114 | return error; | |
4115 | ||
4116 | error = buffer_write_io_error(sbh); | |
4117 | if (error) { | |
b31e1552 ES |
4118 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4119 | "superblock"); | |
914258bf TT |
4120 | clear_buffer_write_io_error(sbh); |
4121 | set_buffer_uptodate(sbh); | |
4122 | } | |
4123 | } | |
c4be0c1d | 4124 | return error; |
ac27a0ec DK |
4125 | } |
4126 | ||
ac27a0ec DK |
4127 | /* |
4128 | * Have we just finished recovery? If so, and if we are mounting (or | |
4129 | * remounting) the filesystem readonly, then we will end up with a | |
4130 | * consistent fs on disk. Record that fact. | |
4131 | */ | |
2b2d6d01 TT |
4132 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4133 | struct ext4_super_block *es) | |
ac27a0ec | 4134 | { |
617ba13b | 4135 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4136 | |
0390131b FM |
4137 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4138 | BUG_ON(journal != NULL); | |
4139 | return; | |
4140 | } | |
dab291af | 4141 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4142 | if (jbd2_journal_flush(journal) < 0) |
4143 | goto out; | |
4144 | ||
617ba13b | 4145 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4146 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4147 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4148 | ext4_commit_super(sb, 1); |
ac27a0ec | 4149 | } |
7ffe1ea8 HK |
4150 | |
4151 | out: | |
dab291af | 4152 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4153 | } |
4154 | ||
4155 | /* | |
4156 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4157 | * has recorded an error from a previous lifetime, move that error to the | |
4158 | * main filesystem now. | |
4159 | */ | |
2b2d6d01 TT |
4160 | static void ext4_clear_journal_err(struct super_block *sb, |
4161 | struct ext4_super_block *es) | |
ac27a0ec DK |
4162 | { |
4163 | journal_t *journal; | |
4164 | int j_errno; | |
4165 | const char *errstr; | |
4166 | ||
0390131b FM |
4167 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4168 | ||
617ba13b | 4169 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4170 | |
4171 | /* | |
4172 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4173 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4174 | */ |
4175 | ||
dab291af | 4176 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4177 | if (j_errno) { |
4178 | char nbuf[16]; | |
4179 | ||
617ba13b | 4180 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4181 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4182 | "from previous mount: %s", errstr); |
12062ddd | 4183 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4184 | |
617ba13b MC |
4185 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4186 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4187 | ext4_commit_super(sb, 1); |
ac27a0ec | 4188 | |
dab291af | 4189 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4190 | } |
4191 | } | |
4192 | ||
4193 | /* | |
4194 | * Force the running and committing transactions to commit, | |
4195 | * and wait on the commit. | |
4196 | */ | |
617ba13b | 4197 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4198 | { |
4199 | journal_t *journal; | |
0390131b | 4200 | int ret = 0; |
ac27a0ec DK |
4201 | |
4202 | if (sb->s_flags & MS_RDONLY) | |
4203 | return 0; | |
4204 | ||
617ba13b | 4205 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4206 | if (journal) { |
437f88cc | 4207 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4208 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4209 | } |
0390131b | 4210 | |
ac27a0ec DK |
4211 | return ret; |
4212 | } | |
4213 | ||
2b2d6d01 | 4214 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4215 | { |
ebc1ac16 | 4216 | lock_super(sb); |
9ca92389 | 4217 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4218 | unlock_super(sb); |
ac27a0ec DK |
4219 | } |
4220 | ||
617ba13b | 4221 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4222 | { |
14ce0cb4 | 4223 | int ret = 0; |
9eddacf9 | 4224 | tid_t target; |
8d5d02e6 | 4225 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4226 | |
9bffad1e | 4227 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4228 | flush_workqueue(sbi->dio_unwritten_wq); |
4229 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4230 | if (wait) |
8d5d02e6 | 4231 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4232 | } |
14ce0cb4 | 4233 | return ret; |
ac27a0ec DK |
4234 | } |
4235 | ||
4236 | /* | |
4237 | * LVM calls this function before a (read-only) snapshot is created. This | |
4238 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4239 | * |
4240 | * Note that only this function cannot bring a filesystem to be in a clean | |
4241 | * state independently, because ext4 prevents a new handle from being started | |
4242 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from | |
4243 | * the upper layer. | |
ac27a0ec | 4244 | */ |
c4be0c1d | 4245 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4246 | { |
c4be0c1d TS |
4247 | int error = 0; |
4248 | journal_t *journal; | |
ac27a0ec | 4249 | |
9ca92389 TT |
4250 | if (sb->s_flags & MS_RDONLY) |
4251 | return 0; | |
ac27a0ec | 4252 | |
9ca92389 | 4253 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4254 | |
9ca92389 TT |
4255 | /* Now we set up the journal barrier. */ |
4256 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4257 | |
9ca92389 TT |
4258 | /* |
4259 | * Don't clear the needs_recovery flag if we failed to flush | |
4260 | * the journal. | |
4261 | */ | |
4262 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4263 | if (error < 0) |
4264 | goto out; | |
9ca92389 TT |
4265 | |
4266 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4267 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4268 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4269 | out: |
4270 | /* we rely on s_frozen to stop further updates */ | |
4271 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4272 | return error; | |
ac27a0ec DK |
4273 | } |
4274 | ||
4275 | /* | |
4276 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4277 | * flag here, even though the filesystem is not technically dirty yet. | |
4278 | */ | |
c4be0c1d | 4279 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4280 | { |
9ca92389 TT |
4281 | if (sb->s_flags & MS_RDONLY) |
4282 | return 0; | |
4283 | ||
4284 | lock_super(sb); | |
4285 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4286 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4287 | ext4_commit_super(sb, 1); | |
4288 | unlock_super(sb); | |
c4be0c1d | 4289 | return 0; |
ac27a0ec DK |
4290 | } |
4291 | ||
673c6100 TT |
4292 | /* |
4293 | * Structure to save mount options for ext4_remount's benefit | |
4294 | */ | |
4295 | struct ext4_mount_options { | |
4296 | unsigned long s_mount_opt; | |
a2595b8a | 4297 | unsigned long s_mount_opt2; |
673c6100 TT |
4298 | uid_t s_resuid; |
4299 | gid_t s_resgid; | |
4300 | unsigned long s_commit_interval; | |
4301 | u32 s_min_batch_time, s_max_batch_time; | |
4302 | #ifdef CONFIG_QUOTA | |
4303 | int s_jquota_fmt; | |
4304 | char *s_qf_names[MAXQUOTAS]; | |
4305 | #endif | |
4306 | }; | |
4307 | ||
2b2d6d01 | 4308 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4309 | { |
2b2d6d01 | 4310 | struct ext4_super_block *es; |
617ba13b MC |
4311 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4312 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4313 | unsigned long old_sb_flags; |
617ba13b | 4314 | struct ext4_mount_options old_opts; |
c79d967d | 4315 | int enable_quota = 0; |
8a266467 | 4316 | ext4_group_t g; |
b3881f74 | 4317 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4318 | int err = 0; |
ac27a0ec DK |
4319 | #ifdef CONFIG_QUOTA |
4320 | int i; | |
4321 | #endif | |
d4c402d9 | 4322 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4323 | |
4324 | /* Store the original options */ | |
bbd6851a | 4325 | lock_super(sb); |
ac27a0ec DK |
4326 | old_sb_flags = sb->s_flags; |
4327 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4328 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4329 | old_opts.s_resuid = sbi->s_resuid; |
4330 | old_opts.s_resgid = sbi->s_resgid; | |
4331 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4332 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4333 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4334 | #ifdef CONFIG_QUOTA |
4335 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4336 | for (i = 0; i < MAXQUOTAS; i++) | |
4337 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4338 | #endif | |
b3881f74 TT |
4339 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4340 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4341 | |
4342 | /* | |
4343 | * Allow the "check" option to be passed as a remount option. | |
4344 | */ | |
b3881f74 TT |
4345 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4346 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4347 | err = -EINVAL; |
4348 | goto restore_opts; | |
4349 | } | |
4350 | ||
4ab2f15b | 4351 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4352 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4353 | |
4354 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4355 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4356 | |
4357 | es = sbi->s_es; | |
4358 | ||
b3881f74 | 4359 | if (sbi->s_journal) { |
0390131b | 4360 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4361 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4362 | } | |
ac27a0ec DK |
4363 | |
4364 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4365 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4366 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4367 | err = -EROFS; |
4368 | goto restore_opts; | |
4369 | } | |
4370 | ||
4371 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4372 | err = dquot_suspend(sb, -1); |
4373 | if (err < 0) | |
c79d967d | 4374 | goto restore_opts; |
c79d967d | 4375 | |
ac27a0ec DK |
4376 | /* |
4377 | * First of all, the unconditional stuff we have to do | |
4378 | * to disable replay of the journal when we next remount | |
4379 | */ | |
4380 | sb->s_flags |= MS_RDONLY; | |
4381 | ||
4382 | /* | |
4383 | * OK, test if we are remounting a valid rw partition | |
4384 | * readonly, and if so set the rdonly flag and then | |
4385 | * mark the partition as valid again. | |
4386 | */ | |
617ba13b MC |
4387 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4388 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4389 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4390 | ||
a63c9eb2 | 4391 | if (sbi->s_journal) |
0390131b | 4392 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4393 | } else { |
a13fb1a4 ES |
4394 | /* Make sure we can mount this feature set readwrite */ |
4395 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4396 | err = -EROFS; |
4397 | goto restore_opts; | |
4398 | } | |
8a266467 TT |
4399 | /* |
4400 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4401 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4402 | */ |
4403 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4404 | struct ext4_group_desc *gdp = | |
4405 | ext4_get_group_desc(sb, g, NULL); | |
4406 | ||
4407 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4408 | ext4_msg(sb, KERN_ERR, |
4409 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4410 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4411 | le16_to_cpu(gdp->bg_checksum)); | |
4412 | err = -EINVAL; | |
4413 | goto restore_opts; | |
4414 | } | |
4415 | } | |
4416 | ||
ead6596b ES |
4417 | /* |
4418 | * If we have an unprocessed orphan list hanging | |
4419 | * around from a previously readonly bdev mount, | |
4420 | * require a full umount/remount for now. | |
4421 | */ | |
4422 | if (es->s_last_orphan) { | |
b31e1552 | 4423 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4424 | "remount RDWR because of unprocessed " |
4425 | "orphan inode list. Please " | |
b31e1552 | 4426 | "umount/remount instead"); |
ead6596b ES |
4427 | err = -EINVAL; |
4428 | goto restore_opts; | |
4429 | } | |
4430 | ||
ac27a0ec DK |
4431 | /* |
4432 | * Mounting a RDONLY partition read-write, so reread | |
4433 | * and store the current valid flag. (It may have | |
4434 | * been changed by e2fsck since we originally mounted | |
4435 | * the partition.) | |
4436 | */ | |
0390131b FM |
4437 | if (sbi->s_journal) |
4438 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4439 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4440 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4441 | goto restore_opts; |
2b2d6d01 | 4442 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4443 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4444 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4445 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4446 | if (ext4_multi_mount_protect(sb, | |
4447 | le64_to_cpu(es->s_mmp_block))) { | |
4448 | err = -EROFS; | |
4449 | goto restore_opts; | |
4450 | } | |
c79d967d | 4451 | enable_quota = 1; |
ac27a0ec DK |
4452 | } |
4453 | } | |
bfff6873 LC |
4454 | |
4455 | /* | |
4456 | * Reinitialize lazy itable initialization thread based on | |
4457 | * current settings | |
4458 | */ | |
4459 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4460 | ext4_unregister_li_request(sb); | |
4461 | else { | |
4462 | ext4_group_t first_not_zeroed; | |
4463 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4464 | ext4_register_li_request(sb, first_not_zeroed); | |
4465 | } | |
4466 | ||
6fd058f7 | 4467 | ext4_setup_system_zone(sb); |
0390131b | 4468 | if (sbi->s_journal == NULL) |
e2d67052 | 4469 | ext4_commit_super(sb, 1); |
0390131b | 4470 | |
ac27a0ec DK |
4471 | #ifdef CONFIG_QUOTA |
4472 | /* Release old quota file names */ | |
4473 | for (i = 0; i < MAXQUOTAS; i++) | |
4474 | if (old_opts.s_qf_names[i] && | |
4475 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4476 | kfree(old_opts.s_qf_names[i]); | |
4477 | #endif | |
bbd6851a | 4478 | unlock_super(sb); |
c79d967d | 4479 | if (enable_quota) |
0f0dd62f | 4480 | dquot_resume(sb, -1); |
d4c402d9 CW |
4481 | |
4482 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4483 | kfree(orig_data); | |
ac27a0ec | 4484 | return 0; |
0b8e58a1 | 4485 | |
ac27a0ec DK |
4486 | restore_opts: |
4487 | sb->s_flags = old_sb_flags; | |
4488 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4489 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4490 | sbi->s_resuid = old_opts.s_resuid; |
4491 | sbi->s_resgid = old_opts.s_resgid; | |
4492 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4493 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4494 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4495 | #ifdef CONFIG_QUOTA |
4496 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4497 | for (i = 0; i < MAXQUOTAS; i++) { | |
4498 | if (sbi->s_qf_names[i] && | |
4499 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4500 | kfree(sbi->s_qf_names[i]); | |
4501 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4502 | } | |
4503 | #endif | |
bbd6851a | 4504 | unlock_super(sb); |
d4c402d9 | 4505 | kfree(orig_data); |
ac27a0ec DK |
4506 | return err; |
4507 | } | |
4508 | ||
2b2d6d01 | 4509 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4510 | { |
4511 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4512 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4513 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 4514 | u64 fsid; |
d02a9391 | 4515 | s64 bfree; |
ac27a0ec | 4516 | |
5e70030d BP |
4517 | if (test_opt(sb, MINIX_DF)) { |
4518 | sbi->s_overhead_last = 0; | |
6bc9feff | 4519 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4520 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4521 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4522 | |
4523 | /* | |
5e70030d BP |
4524 | * Compute the overhead (FS structures). This is constant |
4525 | * for a given filesystem unless the number of block groups | |
4526 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4527 | */ |
4528 | ||
4529 | /* | |
4530 | * All of the blocks before first_data_block are | |
4531 | * overhead | |
4532 | */ | |
4533 | overhead = le32_to_cpu(es->s_first_data_block); | |
4534 | ||
4535 | /* | |
4536 | * Add the overhead attributed to the superblock and | |
4537 | * block group descriptors. If the sparse superblocks | |
4538 | * feature is turned on, then not all groups have this. | |
4539 | */ | |
4540 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
4541 | overhead += ext4_bg_has_super(sb, i) + |
4542 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
4543 | cond_resched(); |
4544 | } | |
4545 | ||
4546 | /* | |
4547 | * Every block group has an inode bitmap, a block | |
4548 | * bitmap, and an inode table. | |
4549 | */ | |
5e70030d BP |
4550 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
4551 | sbi->s_overhead_last = overhead; | |
4552 | smp_wmb(); | |
6bc9feff | 4553 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4554 | } |
4555 | ||
617ba13b | 4556 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4557 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 4558 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
d02a9391 | 4559 | bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
6bc6e63f | 4560 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); |
d02a9391 KM |
4561 | /* prevent underflow in case that few free space is available */ |
4562 | buf->f_bfree = max_t(s64, bfree, 0); | |
bd81d8ee LV |
4563 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4564 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4565 | buf->f_bavail = 0; |
4566 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4567 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4568 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4569 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4570 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4571 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4572 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4573 | |
ac27a0ec DK |
4574 | return 0; |
4575 | } | |
4576 | ||
0b8e58a1 AD |
4577 | /* Helper function for writing quotas on sync - we need to start transaction |
4578 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4579 | * Process 1 Process 2 |
617ba13b | 4580 | * ext4_create() quota_sync() |
a269eb18 | 4581 | * jbd2_journal_start() write_dquot() |
871a2931 | 4582 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4583 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4584 | * |
4585 | */ | |
4586 | ||
4587 | #ifdef CONFIG_QUOTA | |
4588 | ||
4589 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4590 | { | |
4591 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4592 | } | |
4593 | ||
617ba13b | 4594 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4595 | { |
4596 | int ret, err; | |
4597 | handle_t *handle; | |
4598 | struct inode *inode; | |
4599 | ||
4600 | inode = dquot_to_inode(dquot); | |
617ba13b | 4601 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4602 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4603 | if (IS_ERR(handle)) |
4604 | return PTR_ERR(handle); | |
4605 | ret = dquot_commit(dquot); | |
617ba13b | 4606 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4607 | if (!ret) |
4608 | ret = err; | |
4609 | return ret; | |
4610 | } | |
4611 | ||
617ba13b | 4612 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4613 | { |
4614 | int ret, err; | |
4615 | handle_t *handle; | |
4616 | ||
617ba13b | 4617 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4618 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4619 | if (IS_ERR(handle)) |
4620 | return PTR_ERR(handle); | |
4621 | ret = dquot_acquire(dquot); | |
617ba13b | 4622 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4623 | if (!ret) |
4624 | ret = err; | |
4625 | return ret; | |
4626 | } | |
4627 | ||
617ba13b | 4628 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4629 | { |
4630 | int ret, err; | |
4631 | handle_t *handle; | |
4632 | ||
617ba13b | 4633 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4634 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4635 | if (IS_ERR(handle)) { |
4636 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4637 | dquot_release(dquot); | |
ac27a0ec | 4638 | return PTR_ERR(handle); |
9c3013e9 | 4639 | } |
ac27a0ec | 4640 | ret = dquot_release(dquot); |
617ba13b | 4641 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4642 | if (!ret) |
4643 | ret = err; | |
4644 | return ret; | |
4645 | } | |
4646 | ||
617ba13b | 4647 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4648 | { |
2c8be6b2 | 4649 | /* Are we journaling quotas? */ |
617ba13b MC |
4650 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4651 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4652 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4653 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4654 | } else { |
4655 | return dquot_mark_dquot_dirty(dquot); | |
4656 | } | |
4657 | } | |
4658 | ||
617ba13b | 4659 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4660 | { |
4661 | int ret, err; | |
4662 | handle_t *handle; | |
4663 | ||
4664 | /* Data block + inode block */ | |
617ba13b | 4665 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4666 | if (IS_ERR(handle)) |
4667 | return PTR_ERR(handle); | |
4668 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4669 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4670 | if (!ret) |
4671 | ret = err; | |
4672 | return ret; | |
4673 | } | |
4674 | ||
4675 | /* | |
4676 | * Turn on quotas during mount time - we need to find | |
4677 | * the quota file and such... | |
4678 | */ | |
617ba13b | 4679 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4680 | { |
287a8095 CH |
4681 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4682 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4683 | } |
4684 | ||
4685 | /* | |
4686 | * Standard function to be called on quota_on | |
4687 | */ | |
617ba13b | 4688 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4689 | struct path *path) |
ac27a0ec DK |
4690 | { |
4691 | int err; | |
ac27a0ec DK |
4692 | |
4693 | if (!test_opt(sb, QUOTA)) | |
4694 | return -EINVAL; | |
0623543b | 4695 | |
ac27a0ec | 4696 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 4697 | if (path->mnt->mnt_sb != sb) |
ac27a0ec | 4698 | return -EXDEV; |
0623543b JK |
4699 | /* Journaling quota? */ |
4700 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4701 | /* Quotafile not in fs root? */ |
f00c9e44 | 4702 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4703 | ext4_msg(sb, KERN_WARNING, |
4704 | "Quota file not on filesystem root. " | |
4705 | "Journaled quota will not work"); | |
2b2d6d01 | 4706 | } |
0623543b JK |
4707 | |
4708 | /* | |
4709 | * When we journal data on quota file, we have to flush journal to see | |
4710 | * all updates to the file when we bypass pagecache... | |
4711 | */ | |
0390131b | 4712 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4713 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4714 | /* |
4715 | * We don't need to lock updates but journal_flush() could | |
4716 | * otherwise be livelocked... | |
4717 | */ | |
4718 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4719 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4720 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4721 | if (err) |
7ffe1ea8 | 4722 | return err; |
0623543b JK |
4723 | } |
4724 | ||
f00c9e44 | 4725 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4726 | } |
4727 | ||
ca0e05e4 DM |
4728 | static int ext4_quota_off(struct super_block *sb, int type) |
4729 | { | |
21f97697 JK |
4730 | struct inode *inode = sb_dqopt(sb)->files[type]; |
4731 | handle_t *handle; | |
4732 | ||
87009d86 DM |
4733 | /* Force all delayed allocation blocks to be allocated. |
4734 | * Caller already holds s_umount sem */ | |
4735 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4736 | sync_filesystem(sb); |
ca0e05e4 | 4737 | |
0b268590 AG |
4738 | if (!inode) |
4739 | goto out; | |
4740 | ||
21f97697 JK |
4741 | /* Update modification times of quota files when userspace can |
4742 | * start looking at them */ | |
4743 | handle = ext4_journal_start(inode, 1); | |
4744 | if (IS_ERR(handle)) | |
4745 | goto out; | |
4746 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
4747 | ext4_mark_inode_dirty(handle, inode); | |
4748 | ext4_journal_stop(handle); | |
4749 | ||
4750 | out: | |
ca0e05e4 DM |
4751 | return dquot_quota_off(sb, type); |
4752 | } | |
4753 | ||
ac27a0ec DK |
4754 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4755 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 4756 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 4757 | * we don't have to be afraid of races */ |
617ba13b | 4758 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4759 | size_t len, loff_t off) |
4760 | { | |
4761 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4762 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4763 | int err = 0; |
4764 | int offset = off & (sb->s_blocksize - 1); | |
4765 | int tocopy; | |
4766 | size_t toread; | |
4767 | struct buffer_head *bh; | |
4768 | loff_t i_size = i_size_read(inode); | |
4769 | ||
4770 | if (off > i_size) | |
4771 | return 0; | |
4772 | if (off+len > i_size) | |
4773 | len = i_size-off; | |
4774 | toread = len; | |
4775 | while (toread > 0) { | |
4776 | tocopy = sb->s_blocksize - offset < toread ? | |
4777 | sb->s_blocksize - offset : toread; | |
617ba13b | 4778 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4779 | if (err) |
4780 | return err; | |
4781 | if (!bh) /* A hole? */ | |
4782 | memset(data, 0, tocopy); | |
4783 | else | |
4784 | memcpy(data, bh->b_data+offset, tocopy); | |
4785 | brelse(bh); | |
4786 | offset = 0; | |
4787 | toread -= tocopy; | |
4788 | data += tocopy; | |
4789 | blk++; | |
4790 | } | |
4791 | return len; | |
4792 | } | |
4793 | ||
4794 | /* Write to quotafile (we know the transaction is already started and has | |
4795 | * enough credits) */ | |
617ba13b | 4796 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4797 | const char *data, size_t len, loff_t off) |
4798 | { | |
4799 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4800 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4801 | int err = 0; |
4802 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4803 | struct buffer_head *bh; |
4804 | handle_t *handle = journal_current_handle(); | |
4805 | ||
0390131b | 4806 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4807 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4808 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4809 | (unsigned long long)off, (unsigned long long)len); |
4810 | return -EIO; | |
4811 | } | |
67eeb568 DM |
4812 | /* |
4813 | * Since we account only one data block in transaction credits, | |
4814 | * then it is impossible to cross a block boundary. | |
4815 | */ | |
4816 | if (sb->s_blocksize - offset < len) { | |
4817 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4818 | " cancelled because not block aligned", | |
4819 | (unsigned long long)off, (unsigned long long)len); | |
4820 | return -EIO; | |
4821 | } | |
4822 | ||
ac27a0ec | 4823 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4824 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4825 | if (!bh) | |
4826 | goto out; | |
62d2b5f2 JK |
4827 | err = ext4_journal_get_write_access(handle, bh); |
4828 | if (err) { | |
4829 | brelse(bh); | |
4830 | goto out; | |
ac27a0ec | 4831 | } |
67eeb568 DM |
4832 | lock_buffer(bh); |
4833 | memcpy(bh->b_data+offset, data, len); | |
4834 | flush_dcache_page(bh->b_page); | |
4835 | unlock_buffer(bh); | |
62d2b5f2 | 4836 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4837 | brelse(bh); |
ac27a0ec | 4838 | out: |
67eeb568 | 4839 | if (err) { |
4d04e4fb | 4840 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4841 | return err; |
4d04e4fb | 4842 | } |
67eeb568 DM |
4843 | if (inode->i_size < off + len) { |
4844 | i_size_write(inode, off + len); | |
617ba13b | 4845 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 4846 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4847 | } |
ac27a0ec | 4848 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4849 | return len; |
ac27a0ec DK |
4850 | } |
4851 | ||
4852 | #endif | |
4853 | ||
152a0836 AV |
4854 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4855 | const char *dev_name, void *data) | |
ac27a0ec | 4856 | { |
152a0836 | 4857 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4858 | } |
4859 | ||
37f328eb | 4860 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4861 | static inline void register_as_ext2(void) |
4862 | { | |
4863 | int err = register_filesystem(&ext2_fs_type); | |
4864 | if (err) | |
4865 | printk(KERN_WARNING | |
4866 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4867 | } | |
4868 | ||
4869 | static inline void unregister_as_ext2(void) | |
4870 | { | |
4871 | unregister_filesystem(&ext2_fs_type); | |
4872 | } | |
2035e776 TT |
4873 | |
4874 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
4875 | { | |
4876 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
4877 | return 0; | |
4878 | if (sb->s_flags & MS_RDONLY) | |
4879 | return 1; | |
4880 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
4881 | return 0; | |
4882 | return 1; | |
4883 | } | |
51b7e3c9 | 4884 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4885 | #else |
4886 | static inline void register_as_ext2(void) { } | |
4887 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 4888 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4889 | #endif |
4890 | ||
37f328eb | 4891 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4892 | static inline void register_as_ext3(void) |
4893 | { | |
4894 | int err = register_filesystem(&ext3_fs_type); | |
4895 | if (err) | |
4896 | printk(KERN_WARNING | |
4897 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4898 | } | |
4899 | ||
4900 | static inline void unregister_as_ext3(void) | |
4901 | { | |
4902 | unregister_filesystem(&ext3_fs_type); | |
4903 | } | |
2035e776 TT |
4904 | |
4905 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
4906 | { | |
4907 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
4908 | return 0; | |
4909 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
4910 | return 0; | |
4911 | if (sb->s_flags & MS_RDONLY) | |
4912 | return 1; | |
4913 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
4914 | return 0; | |
4915 | return 1; | |
4916 | } | |
51b7e3c9 | 4917 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4918 | #else |
4919 | static inline void register_as_ext3(void) { } | |
4920 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 4921 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4922 | #endif |
4923 | ||
03010a33 TT |
4924 | static struct file_system_type ext4_fs_type = { |
4925 | .owner = THIS_MODULE, | |
4926 | .name = "ext4", | |
152a0836 | 4927 | .mount = ext4_mount, |
03010a33 TT |
4928 | .kill_sb = kill_block_super, |
4929 | .fs_flags = FS_REQUIRES_DEV, | |
4930 | }; | |
4931 | ||
8f021222 | 4932 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
4933 | { |
4934 | struct ext4_features *ef; | |
4935 | int ret = -ENOMEM; | |
4936 | ||
4937 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
4938 | if (!ef) | |
4939 | goto out; | |
4940 | ||
4941 | ef->f_kobj.kset = ext4_kset; | |
4942 | init_completion(&ef->f_kobj_unregister); | |
4943 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
4944 | "features"); | |
4945 | if (ret) { | |
4946 | kfree(ef); | |
4947 | goto out; | |
4948 | } | |
4949 | ||
4950 | ext4_feat = ef; | |
4951 | ret = 0; | |
4952 | out: | |
4953 | return ret; | |
4954 | } | |
4955 | ||
8f021222 LC |
4956 | static void ext4_exit_feat_adverts(void) |
4957 | { | |
4958 | kobject_put(&ext4_feat->f_kobj); | |
4959 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
4960 | kfree(ext4_feat); | |
4961 | } | |
4962 | ||
e9e3bcec ES |
4963 | /* Shared across all ext4 file systems */ |
4964 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
4965 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
4966 | ||
5dabfc78 | 4967 | static int __init ext4_init_fs(void) |
ac27a0ec | 4968 | { |
e9e3bcec | 4969 | int i, err; |
c9de560d | 4970 | |
12e9b892 | 4971 | ext4_check_flag_values(); |
e9e3bcec ES |
4972 | |
4973 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
4974 | mutex_init(&ext4__aio_mutex[i]); | |
4975 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
4976 | } | |
4977 | ||
5dabfc78 | 4978 | err = ext4_init_pageio(); |
6fd058f7 TT |
4979 | if (err) |
4980 | return err; | |
5dabfc78 | 4981 | err = ext4_init_system_zone(); |
bd2d0210 | 4982 | if (err) |
dd68314c | 4983 | goto out7; |
3197ebdb TT |
4984 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4985 | if (!ext4_kset) | |
dd68314c | 4986 | goto out6; |
9f6200bb | 4987 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
dd68314c TT |
4988 | if (!ext4_proc_root) |
4989 | goto out5; | |
857ac889 LC |
4990 | |
4991 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
4992 | if (err) |
4993 | goto out4; | |
857ac889 | 4994 | |
5dabfc78 | 4995 | err = ext4_init_mballoc(); |
ac27a0ec | 4996 | if (err) |
6fd058f7 | 4997 | goto out3; |
c9de560d | 4998 | |
5dabfc78 | 4999 | err = ext4_init_xattr(); |
c9de560d AT |
5000 | if (err) |
5001 | goto out2; | |
ac27a0ec DK |
5002 | err = init_inodecache(); |
5003 | if (err) | |
5004 | goto out1; | |
24b58424 | 5005 | register_as_ext3(); |
2035e776 | 5006 | register_as_ext2(); |
03010a33 | 5007 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5008 | if (err) |
5009 | goto out; | |
bfff6873 LC |
5010 | |
5011 | ext4_li_info = NULL; | |
5012 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
5013 | return 0; |
5014 | out: | |
24b58424 TT |
5015 | unregister_as_ext2(); |
5016 | unregister_as_ext3(); | |
ac27a0ec DK |
5017 | destroy_inodecache(); |
5018 | out1: | |
5dabfc78 | 5019 | ext4_exit_xattr(); |
c9de560d | 5020 | out2: |
5dabfc78 | 5021 | ext4_exit_mballoc(); |
6fd058f7 | 5022 | out3: |
8f021222 | 5023 | ext4_exit_feat_adverts(); |
dd68314c | 5024 | out4: |
6fd058f7 | 5025 | remove_proc_entry("fs/ext4", NULL); |
dd68314c | 5026 | out5: |
6fd058f7 | 5027 | kset_unregister(ext4_kset); |
dd68314c | 5028 | out6: |
5dabfc78 | 5029 | ext4_exit_system_zone(); |
dd68314c | 5030 | out7: |
5dabfc78 | 5031 | ext4_exit_pageio(); |
ac27a0ec DK |
5032 | return err; |
5033 | } | |
5034 | ||
5dabfc78 | 5035 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5036 | { |
bfff6873 | 5037 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5038 | unregister_as_ext2(); |
5039 | unregister_as_ext3(); | |
03010a33 | 5040 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5041 | destroy_inodecache(); |
5dabfc78 TT |
5042 | ext4_exit_xattr(); |
5043 | ext4_exit_mballoc(); | |
8f021222 | 5044 | ext4_exit_feat_adverts(); |
9f6200bb | 5045 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5046 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5047 | ext4_exit_system_zone(); |
5048 | ext4_exit_pageio(); | |
ac27a0ec DK |
5049 | } |
5050 | ||
5051 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5052 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5053 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5054 | module_init(ext4_init_fs) |
5055 | module_exit(ext4_exit_fs) |