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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> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 CH |
46 | #include "ext4.h" |
47 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
48 | #include "xattr.h" |
49 | #include "acl.h" | |
3661d286 | 50 | #include "mballoc.h" |
ac27a0ec | 51 | |
9bffad1e TT |
52 | #define CREATE_TRACE_POINTS |
53 | #include <trace/events/ext4.h> | |
54 | ||
1f109d5a | 55 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 56 | static struct kset *ext4_kset; |
0b75a840 LC |
57 | static struct ext4_lazy_init *ext4_li_info; |
58 | static struct mutex ext4_li_mtx; | |
59 | static struct ext4_features *ext4_feat; | |
9f6200bb | 60 | |
617ba13b | 61 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 62 | unsigned long journal_devnum); |
e2d67052 | 63 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
64 | static void ext4_mark_recovery_complete(struct super_block *sb, |
65 | struct ext4_super_block *es); | |
66 | static void ext4_clear_journal_err(struct super_block *sb, | |
67 | struct ext4_super_block *es); | |
617ba13b | 68 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 69 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 70 | char nbuf[16]); |
2b2d6d01 TT |
71 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
72 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 73 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 74 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 75 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
76 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
77 | const char *dev_name, void *data); | |
2035e776 TT |
78 | static inline int ext2_feature_set_ok(struct super_block *sb); |
79 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 80 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
81 | static void ext4_destroy_lazyinit_thread(void); |
82 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 83 | static void ext4_clear_request_list(void); |
ac27a0ec | 84 | |
2035e776 TT |
85 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
86 | static struct file_system_type ext2_fs_type = { | |
87 | .owner = THIS_MODULE, | |
88 | .name = "ext2", | |
89 | .mount = ext4_mount, | |
90 | .kill_sb = kill_block_super, | |
91 | .fs_flags = FS_REQUIRES_DEV, | |
92 | }; | |
93 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) | |
94 | #else | |
95 | #define IS_EXT2_SB(sb) (0) | |
96 | #endif | |
97 | ||
98 | ||
ba69f9ab JK |
99 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
100 | static struct file_system_type ext3_fs_type = { | |
101 | .owner = THIS_MODULE, | |
102 | .name = "ext3", | |
152a0836 | 103 | .mount = ext4_mount, |
ba69f9ab JK |
104 | .kill_sb = kill_block_super, |
105 | .fs_flags = FS_REQUIRES_DEV, | |
106 | }; | |
107 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
108 | #else | |
109 | #define IS_EXT3_SB(sb) (0) | |
110 | #endif | |
bd81d8ee | 111 | |
8fadc143 AR |
112 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
113 | struct ext4_group_desc *bg) | |
bd81d8ee | 114 | { |
3a14589c | 115 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 116 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 117 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
118 | } |
119 | ||
8fadc143 AR |
120 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
121 | struct ext4_group_desc *bg) | |
bd81d8ee | 122 | { |
5272f837 | 123 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 124 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 125 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
126 | } |
127 | ||
8fadc143 AR |
128 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
129 | struct ext4_group_desc *bg) | |
bd81d8ee | 130 | { |
5272f837 | 131 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 132 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 133 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
134 | } |
135 | ||
560671a0 AK |
136 | __u32 ext4_free_blks_count(struct super_block *sb, |
137 | struct ext4_group_desc *bg) | |
138 | { | |
139 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
140 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 141 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
142 | } |
143 | ||
144 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
145 | struct ext4_group_desc *bg) | |
146 | { | |
147 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
148 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 149 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
150 | } |
151 | ||
152 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
153 | struct ext4_group_desc *bg) | |
154 | { | |
155 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
156 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 157 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
158 | } |
159 | ||
160 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
161 | struct ext4_group_desc *bg) | |
162 | { | |
163 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
164 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 165 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
166 | } |
167 | ||
8fadc143 AR |
168 | void ext4_block_bitmap_set(struct super_block *sb, |
169 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 170 | { |
3a14589c | 171 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
172 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
173 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
174 | } |
175 | ||
8fadc143 AR |
176 | void ext4_inode_bitmap_set(struct super_block *sb, |
177 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 178 | { |
5272f837 | 179 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
180 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
181 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
182 | } |
183 | ||
8fadc143 AR |
184 | void ext4_inode_table_set(struct super_block *sb, |
185 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 186 | { |
5272f837 | 187 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
188 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
189 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
190 | } |
191 | ||
560671a0 AK |
192 | void ext4_free_blks_set(struct super_block *sb, |
193 | struct ext4_group_desc *bg, __u32 count) | |
194 | { | |
195 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
196 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
197 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
198 | } | |
199 | ||
200 | void ext4_free_inodes_set(struct super_block *sb, | |
201 | struct ext4_group_desc *bg, __u32 count) | |
202 | { | |
203 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
204 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
205 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
206 | } | |
207 | ||
208 | void ext4_used_dirs_set(struct super_block *sb, | |
209 | struct ext4_group_desc *bg, __u32 count) | |
210 | { | |
211 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
212 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
213 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
214 | } | |
215 | ||
216 | void ext4_itable_unused_set(struct super_block *sb, | |
217 | struct ext4_group_desc *bg, __u32 count) | |
218 | { | |
219 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
220 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
221 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
222 | } | |
223 | ||
d3d1faf6 CW |
224 | |
225 | /* Just increment the non-pointer handle value */ | |
226 | static handle_t *ext4_get_nojournal(void) | |
227 | { | |
228 | handle_t *handle = current->journal_info; | |
229 | unsigned long ref_cnt = (unsigned long)handle; | |
230 | ||
231 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
232 | ||
233 | ref_cnt++; | |
234 | handle = (handle_t *)ref_cnt; | |
235 | ||
236 | current->journal_info = handle; | |
237 | return handle; | |
238 | } | |
239 | ||
240 | ||
241 | /* Decrement the non-pointer handle value */ | |
242 | static void ext4_put_nojournal(handle_t *handle) | |
243 | { | |
244 | unsigned long ref_cnt = (unsigned long)handle; | |
245 | ||
246 | BUG_ON(ref_cnt == 0); | |
247 | ||
248 | ref_cnt--; | |
249 | handle = (handle_t *)ref_cnt; | |
250 | ||
251 | current->journal_info = handle; | |
252 | } | |
253 | ||
ac27a0ec | 254 | /* |
dab291af | 255 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
256 | * |
257 | * The only special thing we need to do here is to make sure that all | |
258 | * journal_end calls result in the superblock being marked dirty, so | |
259 | * that sync() will call the filesystem's write_super callback if | |
260 | * appropriate. | |
be4f27d3 YY |
261 | * |
262 | * To avoid j_barrier hold in userspace when a user calls freeze(), | |
263 | * ext4 prevents a new handle from being started by s_frozen, which | |
264 | * is in an upper layer. | |
ac27a0ec | 265 | */ |
617ba13b | 266 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
267 | { |
268 | journal_t *journal; | |
be4f27d3 | 269 | handle_t *handle; |
ac27a0ec DK |
270 | |
271 | if (sb->s_flags & MS_RDONLY) | |
272 | return ERR_PTR(-EROFS); | |
273 | ||
617ba13b | 274 | journal = EXT4_SB(sb)->s_journal; |
be4f27d3 YY |
275 | handle = ext4_journal_current_handle(); |
276 | ||
277 | /* | |
278 | * If a handle has been started, it should be allowed to | |
279 | * finish, otherwise deadlock could happen between freeze | |
280 | * and others(e.g. truncate) due to the restart of the | |
281 | * journal handle if the filesystem is forzen and active | |
282 | * handles are not stopped. | |
283 | */ | |
284 | if (!handle) | |
285 | vfs_check_frozen(sb, SB_FREEZE_TRANS); | |
286 | ||
287 | if (!journal) | |
288 | return ext4_get_nojournal(); | |
289 | /* | |
290 | * Special case here: if the journal has aborted behind our | |
291 | * backs (eg. EIO in the commit thread), then we still need to | |
292 | * take the FS itself readonly cleanly. | |
293 | */ | |
294 | if (is_journal_aborted(journal)) { | |
295 | ext4_abort(sb, "Detected aborted journal"); | |
296 | return ERR_PTR(-EROFS); | |
ac27a0ec | 297 | } |
be4f27d3 | 298 | return jbd2_journal_start(journal, nblocks); |
ac27a0ec DK |
299 | } |
300 | ||
301 | /* | |
302 | * The only special thing we need to do here is to make sure that all | |
dab291af | 303 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
304 | * that sync() will call the filesystem's write_super callback if |
305 | * appropriate. | |
306 | */ | |
c398eda0 | 307 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
308 | { |
309 | struct super_block *sb; | |
310 | int err; | |
311 | int rc; | |
312 | ||
0390131b | 313 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 314 | ext4_put_nojournal(handle); |
0390131b FM |
315 | return 0; |
316 | } | |
ac27a0ec DK |
317 | sb = handle->h_transaction->t_journal->j_private; |
318 | err = handle->h_err; | |
dab291af | 319 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
320 | |
321 | if (!err) | |
322 | err = rc; | |
323 | if (err) | |
c398eda0 | 324 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
325 | return err; |
326 | } | |
327 | ||
90c7201b TT |
328 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
329 | const char *err_fn, struct buffer_head *bh, | |
330 | handle_t *handle, int err) | |
ac27a0ec DK |
331 | { |
332 | char nbuf[16]; | |
617ba13b | 333 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 334 | |
0390131b FM |
335 | BUG_ON(!ext4_handle_valid(handle)); |
336 | ||
ac27a0ec DK |
337 | if (bh) |
338 | BUFFER_TRACE(bh, "abort"); | |
339 | ||
340 | if (!handle->h_err) | |
341 | handle->h_err = err; | |
342 | ||
343 | if (is_handle_aborted(handle)) | |
344 | return; | |
345 | ||
90c7201b TT |
346 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
347 | caller, line, errstr, err_fn); | |
ac27a0ec | 348 | |
dab291af | 349 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
350 | } |
351 | ||
1c13d5c0 TT |
352 | static void __save_error_info(struct super_block *sb, const char *func, |
353 | unsigned int line) | |
354 | { | |
355 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
356 | ||
357 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
358 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
359 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
360 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
361 | es->s_last_error_line = cpu_to_le32(line); | |
362 | if (!es->s_first_error_time) { | |
363 | es->s_first_error_time = es->s_last_error_time; | |
364 | strncpy(es->s_first_error_func, func, | |
365 | sizeof(es->s_first_error_func)); | |
366 | es->s_first_error_line = cpu_to_le32(line); | |
367 | es->s_first_error_ino = es->s_last_error_ino; | |
368 | es->s_first_error_block = es->s_last_error_block; | |
369 | } | |
66e61a9e TT |
370 | /* |
371 | * Start the daily error reporting function if it hasn't been | |
372 | * started already | |
373 | */ | |
374 | if (!es->s_error_count) | |
375 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
376 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
377 | } | |
378 | ||
379 | static void save_error_info(struct super_block *sb, const char *func, | |
380 | unsigned int line) | |
381 | { | |
382 | __save_error_info(sb, func, line); | |
383 | ext4_commit_super(sb, 1); | |
384 | } | |
385 | ||
386 | ||
ac27a0ec DK |
387 | /* Deal with the reporting of failure conditions on a filesystem such as |
388 | * inconsistencies detected or read IO failures. | |
389 | * | |
390 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 391 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
392 | * write ordering constraints on the superblock which prevent us from |
393 | * writing it out straight away; and given that the journal is about to | |
394 | * be aborted, we can't rely on the current, or future, transactions to | |
395 | * write out the superblock safely. | |
396 | * | |
dab291af | 397 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 398 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
399 | * that error until we've noted it down and cleared it. |
400 | */ | |
401 | ||
617ba13b | 402 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 403 | { |
ac27a0ec DK |
404 | if (sb->s_flags & MS_RDONLY) |
405 | return; | |
406 | ||
2b2d6d01 | 407 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 408 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 409 | |
4ab2f15b | 410 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 411 | if (journal) |
dab291af | 412 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 413 | } |
2b2d6d01 | 414 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 415 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
416 | sb->s_flags |= MS_RDONLY; |
417 | } | |
ac27a0ec | 418 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 419 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
420 | sb->s_id); |
421 | } | |
422 | ||
12062ddd | 423 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 424 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 425 | { |
0ff2ea7d | 426 | struct va_format vaf; |
ac27a0ec DK |
427 | va_list args; |
428 | ||
429 | va_start(args, fmt); | |
0ff2ea7d JP |
430 | vaf.fmt = fmt; |
431 | vaf.va = &args; | |
432 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
433 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
434 | va_end(args); |
435 | ||
617ba13b | 436 | ext4_handle_error(sb); |
ac27a0ec DK |
437 | } |
438 | ||
c398eda0 TT |
439 | void ext4_error_inode(struct inode *inode, const char *function, |
440 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
441 | const char *fmt, ...) |
442 | { | |
443 | va_list args; | |
f7c21177 | 444 | struct va_format vaf; |
1c13d5c0 | 445 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 446 | |
1c13d5c0 TT |
447 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
448 | es->s_last_error_block = cpu_to_le64(block); | |
449 | save_error_info(inode->i_sb, function, line); | |
273df556 | 450 | va_start(args, fmt); |
f7c21177 TT |
451 | vaf.fmt = fmt; |
452 | vaf.va = &args; | |
c398eda0 TT |
453 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
454 | inode->i_sb->s_id, function, line, inode->i_ino); | |
455 | if (block) | |
f7c21177 TT |
456 | printk(KERN_CONT "block %llu: ", block); |
457 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
458 | va_end(args); |
459 | ||
460 | ext4_handle_error(inode->i_sb); | |
461 | } | |
462 | ||
c398eda0 | 463 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
464 | unsigned int line, ext4_fsblk_t block, |
465 | const char *fmt, ...) | |
273df556 FM |
466 | { |
467 | va_list args; | |
f7c21177 | 468 | struct va_format vaf; |
1c13d5c0 | 469 | struct ext4_super_block *es; |
273df556 FM |
470 | struct inode *inode = file->f_dentry->d_inode; |
471 | char pathname[80], *path; | |
472 | ||
1c13d5c0 TT |
473 | es = EXT4_SB(inode->i_sb)->s_es; |
474 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
475 | save_error_info(inode->i_sb, function, line); | |
273df556 | 476 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 477 | if (IS_ERR(path)) |
273df556 FM |
478 | path = "(unknown)"; |
479 | printk(KERN_CRIT | |
f7c21177 TT |
480 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
481 | inode->i_sb->s_id, function, line, inode->i_ino); | |
482 | if (block) | |
483 | printk(KERN_CONT "block %llu: ", block); | |
484 | va_start(args, fmt); | |
485 | vaf.fmt = fmt; | |
486 | vaf.va = &args; | |
487 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
488 | va_end(args); |
489 | ||
490 | ext4_handle_error(inode->i_sb); | |
491 | } | |
492 | ||
2b2d6d01 | 493 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
494 | char nbuf[16]) |
495 | { | |
496 | char *errstr = NULL; | |
497 | ||
498 | switch (errno) { | |
499 | case -EIO: | |
500 | errstr = "IO failure"; | |
501 | break; | |
502 | case -ENOMEM: | |
503 | errstr = "Out of memory"; | |
504 | break; | |
505 | case -EROFS: | |
78f1ddbb TT |
506 | if (!sb || (EXT4_SB(sb)->s_journal && |
507 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
508 | errstr = "Journal has aborted"; |
509 | else | |
510 | errstr = "Readonly filesystem"; | |
511 | break; | |
512 | default: | |
513 | /* If the caller passed in an extra buffer for unknown | |
514 | * errors, textualise them now. Else we just return | |
515 | * NULL. */ | |
516 | if (nbuf) { | |
517 | /* Check for truncated error codes... */ | |
518 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
519 | errstr = nbuf; | |
520 | } | |
521 | break; | |
522 | } | |
523 | ||
524 | return errstr; | |
525 | } | |
526 | ||
617ba13b | 527 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
528 | * automatically and invokes the appropriate error response. */ |
529 | ||
c398eda0 TT |
530 | void __ext4_std_error(struct super_block *sb, const char *function, |
531 | unsigned int line, int errno) | |
ac27a0ec DK |
532 | { |
533 | char nbuf[16]; | |
534 | const char *errstr; | |
535 | ||
536 | /* Special case: if the error is EROFS, and we're not already | |
537 | * inside a transaction, then there's really no point in logging | |
538 | * an error. */ | |
539 | if (errno == -EROFS && journal_current_handle() == NULL && | |
540 | (sb->s_flags & MS_RDONLY)) | |
541 | return; | |
542 | ||
617ba13b | 543 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
544 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
545 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 546 | save_error_info(sb, function, line); |
ac27a0ec | 547 | |
617ba13b | 548 | ext4_handle_error(sb); |
ac27a0ec DK |
549 | } |
550 | ||
551 | /* | |
617ba13b | 552 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
553 | * abort function may be used to deal with unrecoverable failures such |
554 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
555 | * | |
556 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
557 | * unless the error response on the fs has been set to panic in which | |
558 | * case we take the easy way out and panic immediately. | |
559 | */ | |
560 | ||
c67d859e | 561 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 562 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
563 | { |
564 | va_list args; | |
565 | ||
1c13d5c0 | 566 | save_error_info(sb, function, line); |
ac27a0ec | 567 | va_start(args, fmt); |
c398eda0 TT |
568 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
569 | function, line); | |
ac27a0ec DK |
570 | vprintk(fmt, args); |
571 | printk("\n"); | |
572 | va_end(args); | |
573 | ||
1c13d5c0 TT |
574 | if ((sb->s_flags & MS_RDONLY) == 0) { |
575 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
576 | sb->s_flags |= MS_RDONLY; | |
577 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
578 | if (EXT4_SB(sb)->s_journal) | |
579 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
580 | save_error_info(sb, function, line); | |
581 | } | |
ac27a0ec | 582 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 583 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
584 | } |
585 | ||
0ff2ea7d | 586 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 587 | { |
0ff2ea7d | 588 | struct va_format vaf; |
b31e1552 ES |
589 | va_list args; |
590 | ||
591 | va_start(args, fmt); | |
0ff2ea7d JP |
592 | vaf.fmt = fmt; |
593 | vaf.va = &args; | |
594 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
595 | va_end(args); |
596 | } | |
597 | ||
12062ddd | 598 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 599 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 600 | { |
0ff2ea7d | 601 | struct va_format vaf; |
ac27a0ec DK |
602 | va_list args; |
603 | ||
604 | va_start(args, fmt); | |
0ff2ea7d JP |
605 | vaf.fmt = fmt; |
606 | vaf.va = &args; | |
607 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
608 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
609 | va_end(args); |
610 | } | |
611 | ||
e29136f8 TT |
612 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
613 | struct super_block *sb, ext4_group_t grp, | |
614 | unsigned long ino, ext4_fsblk_t block, | |
615 | const char *fmt, ...) | |
5d1b1b3f AK |
616 | __releases(bitlock) |
617 | __acquires(bitlock) | |
618 | { | |
0ff2ea7d | 619 | struct va_format vaf; |
5d1b1b3f AK |
620 | va_list args; |
621 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
622 | ||
1c13d5c0 TT |
623 | es->s_last_error_ino = cpu_to_le32(ino); |
624 | es->s_last_error_block = cpu_to_le64(block); | |
625 | __save_error_info(sb, function, line); | |
0ff2ea7d | 626 | |
5d1b1b3f | 627 | va_start(args, fmt); |
0ff2ea7d JP |
628 | |
629 | vaf.fmt = fmt; | |
630 | vaf.va = &args; | |
21149d61 | 631 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
632 | sb->s_id, function, line, grp); |
633 | if (ino) | |
0ff2ea7d | 634 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 635 | if (block) |
0ff2ea7d JP |
636 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
637 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
638 | va_end(args); |
639 | ||
640 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 641 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
642 | return; |
643 | } | |
1c13d5c0 | 644 | |
5d1b1b3f AK |
645 | ext4_unlock_group(sb, grp); |
646 | ext4_handle_error(sb); | |
647 | /* | |
648 | * We only get here in the ERRORS_RO case; relocking the group | |
649 | * may be dangerous, but nothing bad will happen since the | |
650 | * filesystem will have already been marked read/only and the | |
651 | * journal has been aborted. We return 1 as a hint to callers | |
652 | * who might what to use the return value from | |
25985edc | 653 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
654 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
655 | * aggressively from the ext4 function in question, with a | |
656 | * more appropriate error code. | |
657 | */ | |
658 | ext4_lock_group(sb, grp); | |
659 | return; | |
660 | } | |
661 | ||
617ba13b | 662 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 663 | { |
617ba13b | 664 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 665 | |
617ba13b | 666 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
667 | return; |
668 | ||
12062ddd | 669 | ext4_warning(sb, |
ac27a0ec DK |
670 | "updating to rev %d because of new feature flag, " |
671 | "running e2fsck is recommended", | |
617ba13b | 672 | EXT4_DYNAMIC_REV); |
ac27a0ec | 673 | |
617ba13b MC |
674 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
675 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
676 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
677 | /* leave es->s_feature_*compat flags alone */ |
678 | /* es->s_uuid will be set by e2fsck if empty */ | |
679 | ||
680 | /* | |
681 | * The rest of the superblock fields should be zero, and if not it | |
682 | * means they are likely already in use, so leave them alone. We | |
683 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
684 | */ | |
685 | } | |
686 | ||
687 | /* | |
688 | * Open the external journal device | |
689 | */ | |
b31e1552 | 690 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
691 | { |
692 | struct block_device *bdev; | |
693 | char b[BDEVNAME_SIZE]; | |
694 | ||
d4d77629 | 695 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
696 | if (IS_ERR(bdev)) |
697 | goto fail; | |
698 | return bdev; | |
699 | ||
700 | fail: | |
b31e1552 | 701 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
702 | __bdevname(dev, b), PTR_ERR(bdev)); |
703 | return NULL; | |
704 | } | |
705 | ||
706 | /* | |
707 | * Release the journal device | |
708 | */ | |
617ba13b | 709 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 710 | { |
e525fd89 | 711 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
712 | } |
713 | ||
617ba13b | 714 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
715 | { |
716 | struct block_device *bdev; | |
717 | int ret = -ENODEV; | |
718 | ||
719 | bdev = sbi->journal_bdev; | |
720 | if (bdev) { | |
617ba13b | 721 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
722 | sbi->journal_bdev = NULL; |
723 | } | |
724 | return ret; | |
725 | } | |
726 | ||
727 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
728 | { | |
617ba13b | 729 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
730 | } |
731 | ||
617ba13b | 732 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
733 | { |
734 | struct list_head *l; | |
735 | ||
b31e1552 ES |
736 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
737 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
738 | |
739 | printk(KERN_ERR "sb_info orphan list:\n"); | |
740 | list_for_each(l, &sbi->s_orphan) { | |
741 | struct inode *inode = orphan_list_entry(l); | |
742 | printk(KERN_ERR " " | |
743 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
744 | inode->i_sb->s_id, inode->i_ino, inode, | |
745 | inode->i_mode, inode->i_nlink, | |
746 | NEXT_ORPHAN(inode)); | |
747 | } | |
748 | } | |
749 | ||
2b2d6d01 | 750 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 751 | { |
617ba13b MC |
752 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
753 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 754 | int i, err; |
ac27a0ec | 755 | |
857ac889 | 756 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
757 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
758 | ||
4c0425ff MC |
759 | flush_workqueue(sbi->dio_unwritten_wq); |
760 | destroy_workqueue(sbi->dio_unwritten_wq); | |
761 | ||
a9e220f8 | 762 | lock_super(sb); |
8c85e125 | 763 | if (sb->s_dirt) |
ebc1ac16 | 764 | ext4_commit_super(sb, 1); |
8c85e125 | 765 | |
0390131b FM |
766 | if (sbi->s_journal) { |
767 | err = jbd2_journal_destroy(sbi->s_journal); | |
768 | sbi->s_journal = NULL; | |
769 | if (err < 0) | |
c67d859e | 770 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 771 | } |
d4edac31 | 772 | |
a1c6c569 | 773 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
774 | ext4_release_system_zone(sb); |
775 | ext4_mb_release(sb); | |
776 | ext4_ext_release(sb); | |
777 | ext4_xattr_put_super(sb); | |
778 | ||
ac27a0ec | 779 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 780 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 781 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 782 | ext4_commit_super(sb, 1); |
ac27a0ec | 783 | } |
240799cd | 784 | if (sbi->s_proc) { |
9f6200bb | 785 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 786 | } |
3197ebdb | 787 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
788 | |
789 | for (i = 0; i < sbi->s_gdb_count; i++) | |
790 | brelse(sbi->s_group_desc[i]); | |
791 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
792 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
793 | vfree(sbi->s_flex_groups); | |
794 | else | |
795 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
796 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
797 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
798 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 799 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
800 | brelse(sbi->s_sbh); |
801 | #ifdef CONFIG_QUOTA | |
802 | for (i = 0; i < MAXQUOTAS; i++) | |
803 | kfree(sbi->s_qf_names[i]); | |
804 | #endif | |
805 | ||
806 | /* Debugging code just in case the in-memory inode orphan list | |
807 | * isn't empty. The on-disk one can be non-empty if we've | |
808 | * detected an error and taken the fs readonly, but the | |
809 | * in-memory list had better be clean by this point. */ | |
810 | if (!list_empty(&sbi->s_orphan)) | |
811 | dump_orphan_list(sb, sbi); | |
812 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
813 | ||
f98393a6 | 814 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
815 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
816 | /* | |
817 | * Invalidate the journal device's buffers. We don't want them | |
818 | * floating about in memory - the physical journal device may | |
819 | * hotswapped, and it breaks the `ro-after' testing code. | |
820 | */ | |
821 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 822 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 823 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
824 | } |
825 | sb->s_fs_info = NULL; | |
3197ebdb TT |
826 | /* |
827 | * Now that we are completely done shutting down the | |
828 | * superblock, we need to actually destroy the kobject. | |
829 | */ | |
3197ebdb TT |
830 | unlock_super(sb); |
831 | kobject_put(&sbi->s_kobj); | |
832 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 833 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 834 | kfree(sbi); |
ac27a0ec DK |
835 | } |
836 | ||
e18b890b | 837 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
838 | |
839 | /* | |
840 | * Called inside transaction, so use GFP_NOFS | |
841 | */ | |
617ba13b | 842 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 843 | { |
617ba13b | 844 | struct ext4_inode_info *ei; |
ac27a0ec | 845 | |
e6b4f8da | 846 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
847 | if (!ei) |
848 | return NULL; | |
0b8e58a1 | 849 | |
ac27a0ec | 850 | ei->vfs_inode.i_version = 1; |
91246c00 | 851 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 852 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
853 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
854 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
855 | ei->i_reserved_data_blocks = 0; |
856 | ei->i_reserved_meta_blocks = 0; | |
857 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 858 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 859 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
860 | #ifdef CONFIG_QUOTA |
861 | ei->i_reserved_quota = 0; | |
862 | #endif | |
8aefcd55 | 863 | ei->jinode = NULL; |
c7064ef1 | 864 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 865 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 866 | ei->cur_aio_dio = NULL; |
b436b9be JK |
867 | ei->i_sync_tid = 0; |
868 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 869 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 870 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 871 | |
ac27a0ec DK |
872 | return &ei->vfs_inode; |
873 | } | |
874 | ||
7ff9c073 TT |
875 | static int ext4_drop_inode(struct inode *inode) |
876 | { | |
877 | int drop = generic_drop_inode(inode); | |
878 | ||
879 | trace_ext4_drop_inode(inode, drop); | |
880 | return drop; | |
881 | } | |
882 | ||
fa0d7e3d NP |
883 | static void ext4_i_callback(struct rcu_head *head) |
884 | { | |
885 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
886 | INIT_LIST_HEAD(&inode->i_dentry); | |
887 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); | |
888 | } | |
889 | ||
617ba13b | 890 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 891 | { |
f7ad6d2e | 892 | ext4_ioend_wait(inode); |
9f7dd93d | 893 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
894 | ext4_msg(inode->i_sb, KERN_ERR, |
895 | "Inode %lu (%p): orphan list check failed!", | |
896 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
897 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
898 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
899 | true); | |
900 | dump_stack(); | |
901 | } | |
fa0d7e3d | 902 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
903 | } |
904 | ||
51cc5068 | 905 | static void init_once(void *foo) |
ac27a0ec | 906 | { |
617ba13b | 907 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 908 | |
a35afb83 | 909 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 910 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 911 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 912 | #endif |
0e855ac8 | 913 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 914 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
915 | } |
916 | ||
917 | static int init_inodecache(void) | |
918 | { | |
617ba13b MC |
919 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
920 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
921 | 0, (SLAB_RECLAIM_ACCOUNT| |
922 | SLAB_MEM_SPREAD), | |
20c2df83 | 923 | init_once); |
617ba13b | 924 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
925 | return -ENOMEM; |
926 | return 0; | |
927 | } | |
928 | ||
929 | static void destroy_inodecache(void) | |
930 | { | |
617ba13b | 931 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
932 | } |
933 | ||
0930fcc1 | 934 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 935 | { |
0930fcc1 AV |
936 | invalidate_inode_buffers(inode); |
937 | end_writeback(inode); | |
9f754758 | 938 | dquot_drop(inode); |
c2ea3fde | 939 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
940 | if (EXT4_I(inode)->jinode) { |
941 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
942 | EXT4_I(inode)->jinode); | |
943 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
944 | EXT4_I(inode)->jinode = NULL; | |
945 | } | |
ac27a0ec DK |
946 | } |
947 | ||
2b2d6d01 TT |
948 | static inline void ext4_show_quota_options(struct seq_file *seq, |
949 | struct super_block *sb) | |
ac27a0ec DK |
950 | { |
951 | #if defined(CONFIG_QUOTA) | |
617ba13b | 952 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 953 | |
5a20bdfc JK |
954 | if (sbi->s_jquota_fmt) { |
955 | char *fmtname = ""; | |
956 | ||
957 | switch (sbi->s_jquota_fmt) { | |
958 | case QFMT_VFS_OLD: | |
959 | fmtname = "vfsold"; | |
960 | break; | |
961 | case QFMT_VFS_V0: | |
962 | fmtname = "vfsv0"; | |
963 | break; | |
964 | case QFMT_VFS_V1: | |
965 | fmtname = "vfsv1"; | |
966 | break; | |
967 | } | |
968 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
969 | } | |
ac27a0ec DK |
970 | |
971 | if (sbi->s_qf_names[USRQUOTA]) | |
972 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
973 | ||
974 | if (sbi->s_qf_names[GRPQUOTA]) | |
975 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
976 | ||
482a7425 | 977 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
978 | seq_puts(seq, ",usrquota"); |
979 | ||
482a7425 | 980 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
981 | seq_puts(seq, ",grpquota"); |
982 | #endif | |
983 | } | |
984 | ||
d9c9bef1 MS |
985 | /* |
986 | * Show an option if | |
987 | * - it's set to a non-default value OR | |
988 | * - if the per-sb default is different from the global default | |
989 | */ | |
617ba13b | 990 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 991 | { |
aa22df2c AK |
992 | int def_errors; |
993 | unsigned long def_mount_opts; | |
ac27a0ec | 994 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
995 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
996 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
997 | |
998 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 999 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
1000 | |
1001 | if (sbi->s_sb_block != 1) | |
1002 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
1003 | if (test_opt(sb, MINIX_DF)) | |
1004 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 1005 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
1006 | seq_puts(seq, ",grpid"); |
1007 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
1008 | seq_puts(seq, ",nogrpid"); | |
1009 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
1010 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
1011 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
1012 | } | |
1013 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
1014 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
1015 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
1016 | } | |
bb4f397a | 1017 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 1018 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
1019 | def_errors == EXT4_ERRORS_CONTINUE) { |
1020 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
1021 | } |
1022 | } | |
aa22df2c | 1023 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 1024 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 1025 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 1026 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 1027 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 1028 | seq_puts(seq, ",nouid32"); |
aa22df2c | 1029 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
1030 | seq_puts(seq, ",debug"); |
1031 | if (test_opt(sb, OLDALLOC)) | |
1032 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 1033 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 1034 | if (test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1035 | seq_puts(seq, ",user_xattr"); |
ea663336 | 1036 | if (!test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1037 | seq_puts(seq, ",nouser_xattr"); |
d9c9bef1 | 1038 | #endif |
03010a33 | 1039 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1040 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1041 | seq_puts(seq, ",acl"); |
1042 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1043 | seq_puts(seq, ",noacl"); | |
1044 | #endif | |
30773840 | 1045 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1046 | seq_printf(seq, ",commit=%u", |
1047 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1048 | } | |
30773840 TT |
1049 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1050 | seq_printf(seq, ",min_batch_time=%u", | |
1051 | (unsigned) sbi->s_min_batch_time); | |
1052 | } | |
1053 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1054 | seq_printf(seq, ",max_batch_time=%u", | |
1055 | (unsigned) sbi->s_min_batch_time); | |
1056 | } | |
1057 | ||
571640ca ES |
1058 | /* |
1059 | * We're changing the default of barrier mount option, so | |
1060 | * let's always display its mount state so it's clear what its | |
1061 | * status is. | |
1062 | */ | |
1063 | seq_puts(seq, ",barrier="); | |
1064 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1065 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1066 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1067 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1068 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1069 | if (test_opt(sb, I_VERSION)) |
1070 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1071 | if (!test_opt(sb, DELALLOC) && |
1072 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1073 | seq_puts(seq, ",nodelalloc"); |
1074 | ||
6fd7a467 TT |
1075 | if (!test_opt(sb, MBLK_IO_SUBMIT)) |
1076 | seq_puts(seq, ",nomblk_io_submit"); | |
cb45bbe4 MS |
1077 | if (sbi->s_stripe) |
1078 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1079 | /* |
1080 | * journal mode get enabled in different ways | |
1081 | * So just print the value even if we didn't specify it | |
1082 | */ | |
617ba13b | 1083 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1084 | seq_puts(seq, ",data=journal"); |
617ba13b | 1085 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1086 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1087 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1088 | seq_puts(seq, ",data=writeback"); |
1089 | ||
240799cd TT |
1090 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1091 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1092 | sbi->s_inode_readahead_blks); | |
1093 | ||
5bf5683a HK |
1094 | if (test_opt(sb, DATA_ERR_ABORT)) |
1095 | seq_puts(seq, ",data_err=abort"); | |
1096 | ||
afd4672d | 1097 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1098 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1099 | |
8b67f04a | 1100 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1101 | seq_puts(seq, ",discard"); |
1102 | ||
e3bb52ae ES |
1103 | if (test_opt(sb, NOLOAD)) |
1104 | seq_puts(seq, ",norecovery"); | |
1105 | ||
744692dc JZ |
1106 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1107 | seq_puts(seq, ",dioread_nolock"); | |
1108 | ||
8b67f04a TT |
1109 | if (test_opt(sb, BLOCK_VALIDITY) && |
1110 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1111 | seq_puts(seq, ",block_validity"); | |
1112 | ||
bfff6873 LC |
1113 | if (!test_opt(sb, INIT_INODE_TABLE)) |
1114 | seq_puts(seq, ",noinit_inode_table"); | |
1115 | else if (sbi->s_li_wait_mult) | |
1116 | seq_printf(seq, ",init_inode_table=%u", | |
1117 | (unsigned) sbi->s_li_wait_mult); | |
1118 | ||
617ba13b | 1119 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1120 | |
ac27a0ec DK |
1121 | return 0; |
1122 | } | |
1123 | ||
1b961ac0 | 1124 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1125 | u64 ino, u32 generation) |
ac27a0ec | 1126 | { |
ac27a0ec | 1127 | struct inode *inode; |
ac27a0ec | 1128 | |
617ba13b | 1129 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1130 | return ERR_PTR(-ESTALE); |
617ba13b | 1131 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1132 | return ERR_PTR(-ESTALE); |
1133 | ||
1134 | /* iget isn't really right if the inode is currently unallocated!! | |
1135 | * | |
617ba13b | 1136 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1137 | * deleted, so we should be safe. |
1138 | * | |
1139 | * Currently we don't know the generation for parent directory, so | |
1140 | * a generation of 0 means "accept any" | |
1141 | */ | |
1d1fe1ee DH |
1142 | inode = ext4_iget(sb, ino); |
1143 | if (IS_ERR(inode)) | |
1144 | return ERR_CAST(inode); | |
1145 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1146 | iput(inode); |
1147 | return ERR_PTR(-ESTALE); | |
1148 | } | |
1b961ac0 CH |
1149 | |
1150 | return inode; | |
1151 | } | |
1152 | ||
1153 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1154 | int fh_len, int fh_type) |
1b961ac0 CH |
1155 | { |
1156 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1157 | ext4_nfs_get_inode); | |
1158 | } | |
1159 | ||
1160 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1161 | int fh_len, int fh_type) |
1b961ac0 CH |
1162 | { |
1163 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1164 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1165 | } |
1166 | ||
c39a7f84 TO |
1167 | /* |
1168 | * Try to release metadata pages (indirect blocks, directories) which are | |
1169 | * mapped via the block device. Since these pages could have journal heads | |
1170 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1171 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1172 | */ | |
0b8e58a1 AD |
1173 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1174 | gfp_t wait) | |
c39a7f84 TO |
1175 | { |
1176 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1177 | ||
1178 | WARN_ON(PageChecked(page)); | |
1179 | if (!page_has_buffers(page)) | |
1180 | return 0; | |
1181 | if (journal) | |
1182 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1183 | wait & ~__GFP_WAIT); | |
1184 | return try_to_free_buffers(page); | |
1185 | } | |
1186 | ||
ac27a0ec | 1187 | #ifdef CONFIG_QUOTA |
af5bc92d | 1188 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1189 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1190 | |
617ba13b MC |
1191 | static int ext4_write_dquot(struct dquot *dquot); |
1192 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1193 | static int ext4_release_dquot(struct dquot *dquot); | |
1194 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1195 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1196 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1197 | struct path *path); |
ca0e05e4 | 1198 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1199 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1200 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1201 | size_t len, loff_t off); |
617ba13b | 1202 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1203 | const char *data, size_t len, loff_t off); |
1204 | ||
61e225dc | 1205 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1206 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1207 | .write_dquot = ext4_write_dquot, |
1208 | .acquire_dquot = ext4_acquire_dquot, | |
1209 | .release_dquot = ext4_release_dquot, | |
1210 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1211 | .write_info = ext4_write_info, |
1212 | .alloc_dquot = dquot_alloc, | |
1213 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1214 | }; |
1215 | ||
0d54b217 | 1216 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1217 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1218 | .quota_off = ext4_quota_off, |
287a8095 CH |
1219 | .quota_sync = dquot_quota_sync, |
1220 | .get_info = dquot_get_dqinfo, | |
1221 | .set_info = dquot_set_dqinfo, | |
1222 | .get_dqblk = dquot_get_dqblk, | |
1223 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1224 | }; |
1225 | #endif | |
1226 | ||
ee9b6d61 | 1227 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1228 | .alloc_inode = ext4_alloc_inode, |
1229 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1230 | .write_inode = ext4_write_inode, |
1231 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1232 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1233 | .evict_inode = ext4_evict_inode, |
617ba13b | 1234 | .put_super = ext4_put_super, |
617ba13b | 1235 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1236 | .freeze_fs = ext4_freeze, |
1237 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1238 | .statfs = ext4_statfs, |
1239 | .remount_fs = ext4_remount, | |
617ba13b | 1240 | .show_options = ext4_show_options, |
ac27a0ec | 1241 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1242 | .quota_read = ext4_quota_read, |
1243 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1244 | #endif |
c39a7f84 | 1245 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1246 | }; |
1247 | ||
9ca92389 TT |
1248 | static const struct super_operations ext4_nojournal_sops = { |
1249 | .alloc_inode = ext4_alloc_inode, | |
1250 | .destroy_inode = ext4_destroy_inode, | |
1251 | .write_inode = ext4_write_inode, | |
1252 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1253 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1254 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1255 | .write_super = ext4_write_super, |
1256 | .put_super = ext4_put_super, | |
1257 | .statfs = ext4_statfs, | |
1258 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1259 | .show_options = ext4_show_options, |
1260 | #ifdef CONFIG_QUOTA | |
1261 | .quota_read = ext4_quota_read, | |
1262 | .quota_write = ext4_quota_write, | |
1263 | #endif | |
1264 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1265 | }; | |
1266 | ||
39655164 | 1267 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1268 | .fh_to_dentry = ext4_fh_to_dentry, |
1269 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1270 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1271 | }; |
1272 | ||
1273 | enum { | |
1274 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1275 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1276 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1277 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1278 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1279 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1280 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1281 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1282 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1283 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1284 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1285 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1286 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1287 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
1449032b TT |
1288 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1289 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1290 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1291 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1292 | Opt_discard, Opt_nodiscard, |
bfff6873 | 1293 | Opt_init_inode_table, Opt_noinit_inode_table, |
ac27a0ec DK |
1294 | }; |
1295 | ||
a447c093 | 1296 | static const match_table_t tokens = { |
ac27a0ec DK |
1297 | {Opt_bsd_df, "bsddf"}, |
1298 | {Opt_minix_df, "minixdf"}, | |
1299 | {Opt_grpid, "grpid"}, | |
1300 | {Opt_grpid, "bsdgroups"}, | |
1301 | {Opt_nogrpid, "nogrpid"}, | |
1302 | {Opt_nogrpid, "sysvgroups"}, | |
1303 | {Opt_resgid, "resgid=%u"}, | |
1304 | {Opt_resuid, "resuid=%u"}, | |
1305 | {Opt_sb, "sb=%u"}, | |
1306 | {Opt_err_cont, "errors=continue"}, | |
1307 | {Opt_err_panic, "errors=panic"}, | |
1308 | {Opt_err_ro, "errors=remount-ro"}, | |
1309 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1310 | {Opt_debug, "debug"}, |
1311 | {Opt_oldalloc, "oldalloc"}, | |
1312 | {Opt_orlov, "orlov"}, | |
1313 | {Opt_user_xattr, "user_xattr"}, | |
1314 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1315 | {Opt_acl, "acl"}, | |
1316 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1317 | {Opt_noload, "noload"}, |
e3bb52ae | 1318 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1319 | {Opt_nobh, "nobh"}, |
1320 | {Opt_bh, "bh"}, | |
1321 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1322 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1323 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1324 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1325 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1326 | {Opt_journal_checksum, "journal_checksum"}, |
1327 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1328 | {Opt_abort, "abort"}, |
1329 | {Opt_data_journal, "data=journal"}, | |
1330 | {Opt_data_ordered, "data=ordered"}, | |
1331 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1332 | {Opt_data_err_abort, "data_err=abort"}, |
1333 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1334 | {Opt_offusrjquota, "usrjquota="}, |
1335 | {Opt_usrjquota, "usrjquota=%s"}, | |
1336 | {Opt_offgrpjquota, "grpjquota="}, | |
1337 | {Opt_grpjquota, "grpjquota=%s"}, | |
1338 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1339 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1340 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1341 | {Opt_grpquota, "grpquota"}, |
1342 | {Opt_noquota, "noquota"}, | |
1343 | {Opt_quota, "quota"}, | |
1344 | {Opt_usrquota, "usrquota"}, | |
1345 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1346 | {Opt_barrier, "barrier"}, |
1347 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1348 | {Opt_i_version, "i_version"}, |
c9de560d | 1349 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1350 | {Opt_resize, "resize"}, |
64769240 | 1351 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1352 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1353 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1354 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1355 | {Opt_block_validity, "block_validity"}, |
1356 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1357 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1358 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1359 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1360 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1361 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1362 | {Opt_dioread_nolock, "dioread_nolock"}, |
1363 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1364 | {Opt_discard, "discard"}, |
1365 | {Opt_nodiscard, "nodiscard"}, | |
bfff6873 LC |
1366 | {Opt_init_inode_table, "init_itable=%u"}, |
1367 | {Opt_init_inode_table, "init_itable"}, | |
1368 | {Opt_noinit_inode_table, "noinit_itable"}, | |
f3f12faa | 1369 | {Opt_err, NULL}, |
ac27a0ec DK |
1370 | }; |
1371 | ||
617ba13b | 1372 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1373 | { |
617ba13b | 1374 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1375 | char *options = (char *) *data; |
1376 | ||
1377 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1378 | return 1; /* Default location */ | |
0b8e58a1 | 1379 | |
ac27a0ec | 1380 | options += 3; |
0b8e58a1 | 1381 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1382 | sb_block = simple_strtoul(options, &options, 0); |
1383 | if (*options && *options != ',') { | |
4776004f | 1384 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1385 | (char *) *data); |
1386 | return 1; | |
1387 | } | |
1388 | if (*options == ',') | |
1389 | options++; | |
1390 | *data = (void *) options; | |
0b8e58a1 | 1391 | |
ac27a0ec DK |
1392 | return sb_block; |
1393 | } | |
1394 | ||
b3881f74 | 1395 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1396 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1397 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1398 | |
56c50f11 DM |
1399 | #ifdef CONFIG_QUOTA |
1400 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1401 | { | |
1402 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1403 | char *qname; | |
1404 | ||
1405 | if (sb_any_quota_loaded(sb) && | |
1406 | !sbi->s_qf_names[qtype]) { | |
1407 | ext4_msg(sb, KERN_ERR, | |
1408 | "Cannot change journaled " | |
1409 | "quota options when quota turned on"); | |
1410 | return 0; | |
1411 | } | |
1412 | qname = match_strdup(args); | |
1413 | if (!qname) { | |
1414 | ext4_msg(sb, KERN_ERR, | |
1415 | "Not enough memory for storing quotafile name"); | |
1416 | return 0; | |
1417 | } | |
1418 | if (sbi->s_qf_names[qtype] && | |
1419 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1420 | ext4_msg(sb, KERN_ERR, | |
1421 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1422 | kfree(qname); | |
1423 | return 0; | |
1424 | } | |
1425 | sbi->s_qf_names[qtype] = qname; | |
1426 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1427 | ext4_msg(sb, KERN_ERR, | |
1428 | "quotafile must be on filesystem root"); | |
1429 | kfree(sbi->s_qf_names[qtype]); | |
1430 | sbi->s_qf_names[qtype] = NULL; | |
1431 | return 0; | |
1432 | } | |
fd8c37ec | 1433 | set_opt(sb, QUOTA); |
56c50f11 DM |
1434 | return 1; |
1435 | } | |
1436 | ||
1437 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1438 | { | |
1439 | ||
1440 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1441 | ||
1442 | if (sb_any_quota_loaded(sb) && | |
1443 | sbi->s_qf_names[qtype]) { | |
1444 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1445 | " when quota turned on"); | |
1446 | return 0; | |
1447 | } | |
1448 | /* | |
1449 | * The space will be released later when all options are confirmed | |
1450 | * to be correct | |
1451 | */ | |
1452 | sbi->s_qf_names[qtype] = NULL; | |
1453 | return 1; | |
1454 | } | |
1455 | #endif | |
1456 | ||
2b2d6d01 | 1457 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1458 | unsigned long *journal_devnum, |
b3881f74 | 1459 | unsigned int *journal_ioprio, |
2b2d6d01 | 1460 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1461 | { |
617ba13b | 1462 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1463 | char *p; |
ac27a0ec DK |
1464 | substring_t args[MAX_OPT_ARGS]; |
1465 | int data_opt = 0; | |
1466 | int option; | |
1467 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1468 | int qfmt; |
ac27a0ec DK |
1469 | #endif |
1470 | ||
1471 | if (!options) | |
1472 | return 1; | |
1473 | ||
2b2d6d01 | 1474 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1475 | int token; |
1476 | if (!*p) | |
1477 | continue; | |
1478 | ||
15121c18 ES |
1479 | /* |
1480 | * Initialize args struct so we know whether arg was | |
1481 | * found; some options take optional arguments. | |
1482 | */ | |
7dc57615 | 1483 | args[0].to = args[0].from = NULL; |
ac27a0ec DK |
1484 | token = match_token(p, tokens, args); |
1485 | switch (token) { | |
1486 | case Opt_bsd_df: | |
437ca0fd | 1487 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1488 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1489 | break; |
1490 | case Opt_minix_df: | |
437ca0fd | 1491 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1492 | set_opt(sb, MINIX_DF); |
437ca0fd | 1493 | |
ac27a0ec DK |
1494 | break; |
1495 | case Opt_grpid: | |
437ca0fd | 1496 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1497 | set_opt(sb, GRPID); |
437ca0fd | 1498 | |
ac27a0ec DK |
1499 | break; |
1500 | case Opt_nogrpid: | |
437ca0fd | 1501 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1502 | clear_opt(sb, GRPID); |
437ca0fd | 1503 | |
ac27a0ec DK |
1504 | break; |
1505 | case Opt_resuid: | |
1506 | if (match_int(&args[0], &option)) | |
1507 | return 0; | |
1508 | sbi->s_resuid = option; | |
1509 | break; | |
1510 | case Opt_resgid: | |
1511 | if (match_int(&args[0], &option)) | |
1512 | return 0; | |
1513 | sbi->s_resgid = option; | |
1514 | break; | |
1515 | case Opt_sb: | |
1516 | /* handled by get_sb_block() instead of here */ | |
1517 | /* *sb_block = match_int(&args[0]); */ | |
1518 | break; | |
1519 | case Opt_err_panic: | |
fd8c37ec TT |
1520 | clear_opt(sb, ERRORS_CONT); |
1521 | clear_opt(sb, ERRORS_RO); | |
1522 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1523 | break; |
1524 | case Opt_err_ro: | |
fd8c37ec TT |
1525 | clear_opt(sb, ERRORS_CONT); |
1526 | clear_opt(sb, ERRORS_PANIC); | |
1527 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1528 | break; |
1529 | case Opt_err_cont: | |
fd8c37ec TT |
1530 | clear_opt(sb, ERRORS_RO); |
1531 | clear_opt(sb, ERRORS_PANIC); | |
1532 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1533 | break; |
1534 | case Opt_nouid32: | |
fd8c37ec | 1535 | set_opt(sb, NO_UID32); |
ac27a0ec | 1536 | break; |
ac27a0ec | 1537 | case Opt_debug: |
fd8c37ec | 1538 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1539 | break; |
1540 | case Opt_oldalloc: | |
fd8c37ec | 1541 | set_opt(sb, OLDALLOC); |
ac27a0ec DK |
1542 | break; |
1543 | case Opt_orlov: | |
fd8c37ec | 1544 | clear_opt(sb, OLDALLOC); |
ac27a0ec | 1545 | break; |
03010a33 | 1546 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1547 | case Opt_user_xattr: |
fd8c37ec | 1548 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1549 | break; |
1550 | case Opt_nouser_xattr: | |
fd8c37ec | 1551 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1552 | break; |
1553 | #else | |
1554 | case Opt_user_xattr: | |
1555 | case Opt_nouser_xattr: | |
b31e1552 | 1556 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1557 | break; |
1558 | #endif | |
03010a33 | 1559 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1560 | case Opt_acl: |
fd8c37ec | 1561 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1562 | break; |
1563 | case Opt_noacl: | |
fd8c37ec | 1564 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1565 | break; |
1566 | #else | |
1567 | case Opt_acl: | |
1568 | case Opt_noacl: | |
b31e1552 | 1569 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1570 | break; |
1571 | #endif | |
ac27a0ec DK |
1572 | case Opt_journal_update: |
1573 | /* @@@ FIXME */ | |
1574 | /* Eventually we will want to be able to create | |
1575 | a journal file here. For now, only allow the | |
1576 | user to specify an existing inode to be the | |
1577 | journal file. */ | |
1578 | if (is_remount) { | |
b31e1552 ES |
1579 | ext4_msg(sb, KERN_ERR, |
1580 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1581 | return 0; |
1582 | } | |
fd8c37ec | 1583 | set_opt(sb, UPDATE_JOURNAL); |
ac27a0ec | 1584 | break; |
ac27a0ec DK |
1585 | case Opt_journal_dev: |
1586 | if (is_remount) { | |
b31e1552 ES |
1587 | ext4_msg(sb, KERN_ERR, |
1588 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1589 | return 0; |
1590 | } | |
1591 | if (match_int(&args[0], &option)) | |
1592 | return 0; | |
1593 | *journal_devnum = option; | |
1594 | break; | |
818d276c | 1595 | case Opt_journal_checksum: |
fd8c37ec | 1596 | set_opt(sb, JOURNAL_CHECKSUM); |
d4da6c9c | 1597 | break; |
818d276c | 1598 | case Opt_journal_async_commit: |
fd8c37ec TT |
1599 | set_opt(sb, JOURNAL_ASYNC_COMMIT); |
1600 | set_opt(sb, JOURNAL_CHECKSUM); | |
818d276c | 1601 | break; |
ac27a0ec | 1602 | case Opt_noload: |
fd8c37ec | 1603 | set_opt(sb, NOLOAD); |
ac27a0ec DK |
1604 | break; |
1605 | case Opt_commit: | |
1606 | if (match_int(&args[0], &option)) | |
1607 | return 0; | |
1608 | if (option < 0) | |
1609 | return 0; | |
1610 | if (option == 0) | |
cd02ff0b | 1611 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1612 | sbi->s_commit_interval = HZ * option; |
1613 | break; | |
30773840 TT |
1614 | case Opt_max_batch_time: |
1615 | if (match_int(&args[0], &option)) | |
1616 | return 0; | |
1617 | if (option < 0) | |
1618 | return 0; | |
1619 | if (option == 0) | |
1620 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1621 | sbi->s_max_batch_time = option; | |
1622 | break; | |
1623 | case Opt_min_batch_time: | |
1624 | if (match_int(&args[0], &option)) | |
1625 | return 0; | |
1626 | if (option < 0) | |
1627 | return 0; | |
1628 | sbi->s_min_batch_time = option; | |
1629 | break; | |
ac27a0ec | 1630 | case Opt_data_journal: |
617ba13b | 1631 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1632 | goto datacheck; |
1633 | case Opt_data_ordered: | |
617ba13b | 1634 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1635 | goto datacheck; |
1636 | case Opt_data_writeback: | |
617ba13b | 1637 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1638 | datacheck: |
1639 | if (is_remount) { | |
482a7425 | 1640 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1641 | ext4_msg(sb, KERN_ERR, |
1642 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1643 | return 0; |
1644 | } | |
1645 | } else { | |
fd8c37ec | 1646 | clear_opt(sb, DATA_FLAGS); |
ac27a0ec DK |
1647 | sbi->s_mount_opt |= data_opt; |
1648 | } | |
1649 | break; | |
5bf5683a | 1650 | case Opt_data_err_abort: |
fd8c37ec | 1651 | set_opt(sb, DATA_ERR_ABORT); |
5bf5683a HK |
1652 | break; |
1653 | case Opt_data_err_ignore: | |
fd8c37ec | 1654 | clear_opt(sb, DATA_ERR_ABORT); |
5bf5683a | 1655 | break; |
ac27a0ec DK |
1656 | #ifdef CONFIG_QUOTA |
1657 | case Opt_usrjquota: | |
56c50f11 | 1658 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1659 | return 0; |
56c50f11 DM |
1660 | break; |
1661 | case Opt_grpjquota: | |
1662 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1663 | return 0; |
ac27a0ec DK |
1664 | break; |
1665 | case Opt_offusrjquota: | |
56c50f11 DM |
1666 | if (!clear_qf_name(sb, USRQUOTA)) |
1667 | return 0; | |
1668 | break; | |
ac27a0ec | 1669 | case Opt_offgrpjquota: |
56c50f11 | 1670 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1671 | return 0; |
ac27a0ec | 1672 | break; |
56c50f11 | 1673 | |
ac27a0ec | 1674 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1675 | qfmt = QFMT_VFS_OLD; |
1676 | goto set_qf_format; | |
ac27a0ec | 1677 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1678 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1679 | goto set_qf_format; |
1680 | case Opt_jqfmt_vfsv1: | |
1681 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1682 | set_qf_format: |
17bd13b3 | 1683 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1684 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1685 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1686 | "journaled quota options when " |
b31e1552 | 1687 | "quota turned on"); |
dfc5d03f JK |
1688 | return 0; |
1689 | } | |
1690 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1691 | break; |
1692 | case Opt_quota: | |
1693 | case Opt_usrquota: | |
fd8c37ec TT |
1694 | set_opt(sb, QUOTA); |
1695 | set_opt(sb, USRQUOTA); | |
ac27a0ec DK |
1696 | break; |
1697 | case Opt_grpquota: | |
fd8c37ec TT |
1698 | set_opt(sb, QUOTA); |
1699 | set_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1700 | break; |
1701 | case Opt_noquota: | |
17bd13b3 | 1702 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1703 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1704 | "options when quota turned on"); | |
ac27a0ec DK |
1705 | return 0; |
1706 | } | |
fd8c37ec TT |
1707 | clear_opt(sb, QUOTA); |
1708 | clear_opt(sb, USRQUOTA); | |
1709 | clear_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1710 | break; |
1711 | #else | |
1712 | case Opt_quota: | |
1713 | case Opt_usrquota: | |
1714 | case Opt_grpquota: | |
b31e1552 ES |
1715 | ext4_msg(sb, KERN_ERR, |
1716 | "quota options not supported"); | |
cd59e7b9 | 1717 | break; |
ac27a0ec DK |
1718 | case Opt_usrjquota: |
1719 | case Opt_grpjquota: | |
1720 | case Opt_offusrjquota: | |
1721 | case Opt_offgrpjquota: | |
1722 | case Opt_jqfmt_vfsold: | |
1723 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1724 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1725 | ext4_msg(sb, KERN_ERR, |
1726 | "journaled quota options not supported"); | |
ac27a0ec DK |
1727 | break; |
1728 | case Opt_noquota: | |
1729 | break; | |
1730 | #endif | |
1731 | case Opt_abort: | |
4ab2f15b | 1732 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1733 | break; |
06705bff | 1734 | case Opt_nobarrier: |
fd8c37ec | 1735 | clear_opt(sb, BARRIER); |
06705bff | 1736 | break; |
ac27a0ec | 1737 | case Opt_barrier: |
15121c18 ES |
1738 | if (args[0].from) { |
1739 | if (match_int(&args[0], &option)) | |
1740 | return 0; | |
1741 | } else | |
1742 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec | 1743 | if (option) |
fd8c37ec | 1744 | set_opt(sb, BARRIER); |
ac27a0ec | 1745 | else |
fd8c37ec | 1746 | clear_opt(sb, BARRIER); |
ac27a0ec DK |
1747 | break; |
1748 | case Opt_ignore: | |
1749 | break; | |
1750 | case Opt_resize: | |
1751 | if (!is_remount) { | |
b31e1552 ES |
1752 | ext4_msg(sb, KERN_ERR, |
1753 | "resize option only available " | |
1754 | "for remount"); | |
ac27a0ec DK |
1755 | return 0; |
1756 | } | |
1757 | if (match_int(&args[0], &option) != 0) | |
1758 | return 0; | |
1759 | *n_blocks_count = option; | |
1760 | break; | |
1761 | case Opt_nobh: | |
206f7ab4 CH |
1762 | ext4_msg(sb, KERN_WARNING, |
1763 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1764 | break; |
1765 | case Opt_bh: | |
206f7ab4 CH |
1766 | ext4_msg(sb, KERN_WARNING, |
1767 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1768 | break; |
25ec56b5 | 1769 | case Opt_i_version: |
fd8c37ec | 1770 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1771 | sb->s_flags |= MS_I_VERSION; |
1772 | break; | |
dd919b98 | 1773 | case Opt_nodelalloc: |
fd8c37ec | 1774 | clear_opt(sb, DELALLOC); |
dd919b98 | 1775 | break; |
1449032b | 1776 | case Opt_mblk_io_submit: |
fd8c37ec | 1777 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1778 | break; |
1779 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1780 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1781 | break; |
c9de560d AT |
1782 | case Opt_stripe: |
1783 | if (match_int(&args[0], &option)) | |
1784 | return 0; | |
1785 | if (option < 0) | |
1786 | return 0; | |
1787 | sbi->s_stripe = option; | |
1788 | break; | |
64769240 | 1789 | case Opt_delalloc: |
fd8c37ec | 1790 | set_opt(sb, DELALLOC); |
64769240 | 1791 | break; |
6fd058f7 | 1792 | case Opt_block_validity: |
fd8c37ec | 1793 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1794 | break; |
1795 | case Opt_noblock_validity: | |
fd8c37ec | 1796 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1797 | break; |
240799cd TT |
1798 | case Opt_inode_readahead_blks: |
1799 | if (match_int(&args[0], &option)) | |
1800 | return 0; | |
1801 | if (option < 0 || option > (1 << 30)) | |
1802 | return 0; | |
5dbd571d | 1803 | if (option && !is_power_of_2(option)) { |
b31e1552 ES |
1804 | ext4_msg(sb, KERN_ERR, |
1805 | "EXT4-fs: inode_readahead_blks" | |
1806 | " must be a power of 2"); | |
3197ebdb TT |
1807 | return 0; |
1808 | } | |
240799cd TT |
1809 | sbi->s_inode_readahead_blks = option; |
1810 | break; | |
b3881f74 TT |
1811 | case Opt_journal_ioprio: |
1812 | if (match_int(&args[0], &option)) | |
1813 | return 0; | |
1814 | if (option < 0 || option > 7) | |
1815 | break; | |
1816 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1817 | option); | |
1818 | break; | |
06705bff | 1819 | case Opt_noauto_da_alloc: |
fd8c37ec | 1820 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1821 | break; |
afd4672d | 1822 | case Opt_auto_da_alloc: |
15121c18 ES |
1823 | if (args[0].from) { |
1824 | if (match_int(&args[0], &option)) | |
1825 | return 0; | |
1826 | } else | |
1827 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1828 | if (option) |
fd8c37ec | 1829 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1830 | else |
fd8c37ec | 1831 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1832 | break; |
5328e635 | 1833 | case Opt_discard: |
fd8c37ec | 1834 | set_opt(sb, DISCARD); |
5328e635 ES |
1835 | break; |
1836 | case Opt_nodiscard: | |
fd8c37ec | 1837 | clear_opt(sb, DISCARD); |
5328e635 | 1838 | break; |
744692dc | 1839 | case Opt_dioread_nolock: |
fd8c37ec | 1840 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1841 | break; |
1842 | case Opt_dioread_lock: | |
fd8c37ec | 1843 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1844 | break; |
bfff6873 | 1845 | case Opt_init_inode_table: |
fd8c37ec | 1846 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1847 | if (args[0].from) { |
1848 | if (match_int(&args[0], &option)) | |
1849 | return 0; | |
1850 | } else | |
1851 | option = EXT4_DEF_LI_WAIT_MULT; | |
1852 | if (option < 0) | |
1853 | return 0; | |
1854 | sbi->s_li_wait_mult = option; | |
1855 | break; | |
1856 | case Opt_noinit_inode_table: | |
fd8c37ec | 1857 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1858 | break; |
ac27a0ec | 1859 | default: |
b31e1552 ES |
1860 | ext4_msg(sb, KERN_ERR, |
1861 | "Unrecognized mount option \"%s\" " | |
1862 | "or missing value", p); | |
ac27a0ec DK |
1863 | return 0; |
1864 | } | |
1865 | } | |
1866 | #ifdef CONFIG_QUOTA | |
1867 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1868 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1869 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1870 | |
482a7425 | 1871 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1872 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1873 | |
56c50f11 | 1874 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1875 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1876 | "format mixing"); | |
ac27a0ec DK |
1877 | return 0; |
1878 | } | |
1879 | ||
1880 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1881 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1882 | "not specified"); | |
ac27a0ec DK |
1883 | return 0; |
1884 | } | |
1885 | } else { | |
1886 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1887 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1888 | "specified with no journaling " |
b31e1552 | 1889 | "enabled"); |
ac27a0ec DK |
1890 | return 0; |
1891 | } | |
1892 | } | |
1893 | #endif | |
1894 | return 1; | |
1895 | } | |
1896 | ||
617ba13b | 1897 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1898 | int read_only) |
1899 | { | |
617ba13b | 1900 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1901 | int res = 0; |
1902 | ||
617ba13b | 1903 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1904 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1905 | "forcing read-only mode"); | |
ac27a0ec DK |
1906 | res = MS_RDONLY; |
1907 | } | |
1908 | if (read_only) | |
1909 | return res; | |
617ba13b | 1910 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1911 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1912 | "running e2fsck is recommended"); | |
617ba13b | 1913 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1914 | ext4_msg(sb, KERN_WARNING, |
1915 | "warning: mounting fs with errors, " | |
1916 | "running e2fsck is recommended"); | |
ed3ce80a | 1917 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1918 | le16_to_cpu(es->s_mnt_count) >= |
1919 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1920 | ext4_msg(sb, KERN_WARNING, |
1921 | "warning: maximal mount count reached, " | |
1922 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1923 | else if (le32_to_cpu(es->s_checkinterval) && |
1924 | (le32_to_cpu(es->s_lastcheck) + | |
1925 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1926 | ext4_msg(sb, KERN_WARNING, |
1927 | "warning: checktime reached, " | |
1928 | "running e2fsck is recommended"); | |
0b8e58a1 | 1929 | if (!sbi->s_journal) |
0390131b | 1930 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1931 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1932 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1933 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1934 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1935 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1936 | if (sbi->s_journal) |
1937 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1938 | |
e2d67052 | 1939 | ext4_commit_super(sb, 1); |
ac27a0ec | 1940 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1941 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1942 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1943 | sb->s_blocksize, |
1944 | sbi->s_groups_count, | |
617ba13b MC |
1945 | EXT4_BLOCKS_PER_GROUP(sb), |
1946 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1947 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1948 | |
ac27a0ec DK |
1949 | return res; |
1950 | } | |
1951 | ||
772cb7c8 JS |
1952 | static int ext4_fill_flex_info(struct super_block *sb) |
1953 | { | |
1954 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1955 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1956 | ext4_group_t flex_group_count; |
1957 | ext4_group_t flex_group; | |
1958 | int groups_per_flex = 0; | |
c5ca7c76 | 1959 | size_t size; |
772cb7c8 JS |
1960 | int i; |
1961 | ||
503358ae TT |
1962 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1963 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1964 | ||
1965 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1966 | sbi->s_log_groups_per_flex = 0; |
1967 | return 1; | |
1968 | } | |
1969 | ||
c62a11fd FB |
1970 | /* We allocate both existing and potentially added groups */ |
1971 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1972 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1973 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1974 | size = flex_group_count * sizeof(struct flex_groups); |
1975 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1976 | if (sbi->s_flex_groups == NULL) { | |
94de56ab JP |
1977 | sbi->s_flex_groups = vzalloc(size); |
1978 | if (sbi->s_flex_groups == NULL) { | |
1979 | ext4_msg(sb, KERN_ERR, | |
1980 | "not enough memory for %u flex groups", | |
1981 | flex_group_count); | |
1982 | goto failed; | |
1983 | } | |
772cb7c8 | 1984 | } |
772cb7c8 | 1985 | |
772cb7c8 | 1986 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1987 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1988 | |
1989 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1990 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1991 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1992 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1993 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1994 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1995 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1996 | } |
1997 | ||
1998 | return 1; | |
1999 | failed: | |
2000 | return 0; | |
2001 | } | |
2002 | ||
717d50e4 AD |
2003 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
2004 | struct ext4_group_desc *gdp) | |
2005 | { | |
2006 | __u16 crc = 0; | |
2007 | ||
2008 | if (sbi->s_es->s_feature_ro_compat & | |
2009 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
2010 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2011 | __le32 le_group = cpu_to_le32(block_group); | |
2012 | ||
2013 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2014 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2015 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2016 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2017 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2018 | if ((sbi->s_es->s_feature_incompat & | |
2019 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2020 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2021 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2022 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2023 | offset); | |
2024 | } | |
2025 | ||
2026 | return cpu_to_le16(crc); | |
2027 | } | |
2028 | ||
2029 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
2030 | struct ext4_group_desc *gdp) | |
2031 | { | |
2032 | if ((sbi->s_es->s_feature_ro_compat & | |
2033 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
2034 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2035 | return 0; | |
2036 | ||
2037 | return 1; | |
2038 | } | |
2039 | ||
ac27a0ec | 2040 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2041 | static int ext4_check_descriptors(struct super_block *sb, |
2042 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2043 | { |
617ba13b MC |
2044 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2045 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2046 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2047 | ext4_fsblk_t block_bitmap; |
2048 | ext4_fsblk_t inode_bitmap; | |
2049 | ext4_fsblk_t inode_table; | |
ce421581 | 2050 | int flexbg_flag = 0; |
bfff6873 | 2051 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2052 | |
ce421581 JS |
2053 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2054 | flexbg_flag = 1; | |
2055 | ||
af5bc92d | 2056 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2057 | |
197cd65a AM |
2058 | for (i = 0; i < sbi->s_groups_count; i++) { |
2059 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2060 | ||
ce421581 | 2061 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2062 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2063 | else |
2064 | last_block = first_block + | |
617ba13b | 2065 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2066 | |
bfff6873 LC |
2067 | if ((grp == sbi->s_groups_count) && |
2068 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2069 | grp = i; | |
2070 | ||
8fadc143 | 2071 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2072 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2073 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2074 | "Block bitmap for group %u not in group " |
b31e1552 | 2075 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2076 | return 0; |
2077 | } | |
8fadc143 | 2078 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2079 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2080 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2081 | "Inode bitmap for group %u not in group " |
b31e1552 | 2082 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2083 | return 0; |
2084 | } | |
8fadc143 | 2085 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2086 | if (inode_table < first_block || |
2b2d6d01 | 2087 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2088 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2089 | "Inode table for group %u not in group " |
b31e1552 | 2090 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2091 | return 0; |
2092 | } | |
955ce5f5 | 2093 | ext4_lock_group(sb, i); |
717d50e4 | 2094 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2095 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2096 | "Checksum for group %u failed (%u!=%u)", | |
2097 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2098 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2099 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2100 | ext4_unlock_group(sb, i); |
8a266467 | 2101 | return 0; |
7ee1ec4c | 2102 | } |
717d50e4 | 2103 | } |
955ce5f5 | 2104 | ext4_unlock_group(sb, i); |
ce421581 JS |
2105 | if (!flexbg_flag) |
2106 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2107 | } |
bfff6873 LC |
2108 | if (NULL != first_not_zeroed) |
2109 | *first_not_zeroed = grp; | |
ac27a0ec | 2110 | |
bd81d8ee | 2111 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 2112 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2113 | return 1; |
2114 | } | |
2115 | ||
617ba13b | 2116 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2117 | * the superblock) which were deleted from all directories, but held open by |
2118 | * a process at the time of a crash. We walk the list and try to delete these | |
2119 | * inodes at recovery time (only with a read-write filesystem). | |
2120 | * | |
2121 | * In order to keep the orphan inode chain consistent during traversal (in | |
2122 | * case of crash during recovery), we link each inode into the superblock | |
2123 | * orphan list_head and handle it the same way as an inode deletion during | |
2124 | * normal operation (which journals the operations for us). | |
2125 | * | |
2126 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2127 | * accidentally point at an in-use or already deleted inode. The worst that | |
2128 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2129 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2130 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2131 | * inode cleanup for us, so we can safely abort without any further action. | |
2132 | */ | |
2b2d6d01 TT |
2133 | static void ext4_orphan_cleanup(struct super_block *sb, |
2134 | struct ext4_super_block *es) | |
ac27a0ec DK |
2135 | { |
2136 | unsigned int s_flags = sb->s_flags; | |
2137 | int nr_orphans = 0, nr_truncates = 0; | |
2138 | #ifdef CONFIG_QUOTA | |
2139 | int i; | |
2140 | #endif | |
2141 | if (!es->s_last_orphan) { | |
2142 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2143 | return; | |
2144 | } | |
2145 | ||
a8f48a95 | 2146 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2147 | ext4_msg(sb, KERN_ERR, "write access " |
2148 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2149 | return; |
2150 | } | |
2151 | ||
d39195c3 AG |
2152 | /* Check if feature set would not allow a r/w mount */ |
2153 | if (!ext4_feature_set_ok(sb, 0)) { | |
2154 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2155 | "unknown ROCOMPAT features"); | |
2156 | return; | |
2157 | } | |
2158 | ||
617ba13b | 2159 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2160 | if (es->s_last_orphan) |
2161 | jbd_debug(1, "Errors on filesystem, " | |
2162 | "clearing orphan list.\n"); | |
2163 | es->s_last_orphan = 0; | |
2164 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2165 | return; | |
2166 | } | |
2167 | ||
2168 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2169 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2170 | sb->s_flags &= ~MS_RDONLY; |
2171 | } | |
2172 | #ifdef CONFIG_QUOTA | |
2173 | /* Needed for iput() to work correctly and not trash data */ | |
2174 | sb->s_flags |= MS_ACTIVE; | |
2175 | /* Turn on quotas so that they are updated correctly */ | |
2176 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2177 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2178 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2179 | if (ret < 0) |
b31e1552 ES |
2180 | ext4_msg(sb, KERN_ERR, |
2181 | "Cannot turn on journaled " | |
2182 | "quota: error %d", ret); | |
ac27a0ec DK |
2183 | } |
2184 | } | |
2185 | #endif | |
2186 | ||
2187 | while (es->s_last_orphan) { | |
2188 | struct inode *inode; | |
2189 | ||
97bd42b9 JB |
2190 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2191 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2192 | es->s_last_orphan = 0; |
2193 | break; | |
2194 | } | |
2195 | ||
617ba13b | 2196 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2197 | dquot_initialize(inode); |
ac27a0ec | 2198 | if (inode->i_nlink) { |
b31e1552 ES |
2199 | ext4_msg(sb, KERN_DEBUG, |
2200 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2201 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2202 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2203 | inode->i_ino, inode->i_size); |
617ba13b | 2204 | ext4_truncate(inode); |
ac27a0ec DK |
2205 | nr_truncates++; |
2206 | } else { | |
b31e1552 ES |
2207 | ext4_msg(sb, KERN_DEBUG, |
2208 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2209 | __func__, inode->i_ino); |
ac27a0ec DK |
2210 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2211 | inode->i_ino); | |
2212 | nr_orphans++; | |
2213 | } | |
2214 | iput(inode); /* The delete magic happens here! */ | |
2215 | } | |
2216 | ||
2b2d6d01 | 2217 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2218 | |
2219 | if (nr_orphans) | |
b31e1552 ES |
2220 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2221 | PLURAL(nr_orphans)); | |
ac27a0ec | 2222 | if (nr_truncates) |
b31e1552 ES |
2223 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2224 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2225 | #ifdef CONFIG_QUOTA |
2226 | /* Turn quotas off */ | |
2227 | for (i = 0; i < MAXQUOTAS; i++) { | |
2228 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2229 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2230 | } |
2231 | #endif | |
2232 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2233 | } | |
0b8e58a1 | 2234 | |
cd2291a4 ES |
2235 | /* |
2236 | * Maximal extent format file size. | |
2237 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2238 | * extent format containers, within a sector_t, and within i_blocks | |
2239 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2240 | * so that won't be a limiting factor. | |
2241 | * | |
2242 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2243 | */ | |
f287a1a5 | 2244 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2245 | { |
2246 | loff_t res; | |
2247 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2248 | ||
2249 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2250 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2251 | /* |
90c699a9 | 2252 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2253 | * i_block represent total blocks in 512 bytes |
2254 | * 32 == size of vfs inode i_blocks * 8 | |
2255 | */ | |
2256 | upper_limit = (1LL << 32) - 1; | |
2257 | ||
2258 | /* total blocks in file system block size */ | |
2259 | upper_limit >>= (blkbits - 9); | |
2260 | upper_limit <<= blkbits; | |
2261 | } | |
2262 | ||
2263 | /* 32-bit extent-start container, ee_block */ | |
2264 | res = 1LL << 32; | |
2265 | res <<= blkbits; | |
2266 | res -= 1; | |
2267 | ||
2268 | /* Sanity check against vm- & vfs- imposed limits */ | |
2269 | if (res > upper_limit) | |
2270 | res = upper_limit; | |
2271 | ||
2272 | return res; | |
2273 | } | |
ac27a0ec | 2274 | |
ac27a0ec | 2275 | /* |
cd2291a4 | 2276 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2277 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2278 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2279 | */ |
f287a1a5 | 2280 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2281 | { |
617ba13b | 2282 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2283 | int meta_blocks; |
2284 | loff_t upper_limit; | |
0b8e58a1 AD |
2285 | /* This is calculated to be the largest file size for a dense, block |
2286 | * mapped file such that the file's total number of 512-byte sectors, | |
2287 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2288 | * | |
2289 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2290 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2291 | */ |
2292 | ||
f287a1a5 | 2293 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2294 | /* |
90c699a9 | 2295 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2296 | * the inode i_block field represents total file blocks in |
2297 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2298 | */ |
2299 | upper_limit = (1LL << 32) - 1; | |
2300 | ||
2301 | /* total blocks in file system block size */ | |
2302 | upper_limit >>= (bits - 9); | |
2303 | ||
2304 | } else { | |
8180a562 AK |
2305 | /* |
2306 | * We use 48 bit ext4_inode i_blocks | |
2307 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2308 | * represent total number of blocks in | |
2309 | * file system block size | |
2310 | */ | |
0fc1b451 AK |
2311 | upper_limit = (1LL << 48) - 1; |
2312 | ||
0fc1b451 AK |
2313 | } |
2314 | ||
2315 | /* indirect blocks */ | |
2316 | meta_blocks = 1; | |
2317 | /* double indirect blocks */ | |
2318 | meta_blocks += 1 + (1LL << (bits-2)); | |
2319 | /* tripple indirect blocks */ | |
2320 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2321 | ||
2322 | upper_limit -= meta_blocks; | |
2323 | upper_limit <<= bits; | |
ac27a0ec DK |
2324 | |
2325 | res += 1LL << (bits-2); | |
2326 | res += 1LL << (2*(bits-2)); | |
2327 | res += 1LL << (3*(bits-2)); | |
2328 | res <<= bits; | |
2329 | if (res > upper_limit) | |
2330 | res = upper_limit; | |
0fc1b451 AK |
2331 | |
2332 | if (res > MAX_LFS_FILESIZE) | |
2333 | res = MAX_LFS_FILESIZE; | |
2334 | ||
ac27a0ec DK |
2335 | return res; |
2336 | } | |
2337 | ||
617ba13b | 2338 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2339 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2340 | { |
617ba13b | 2341 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2342 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2343 | int has_super = 0; |
2344 | ||
2345 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2346 | ||
617ba13b | 2347 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2348 | nr < first_meta_bg) |
70bbb3e0 | 2349 | return logical_sb_block + nr + 1; |
ac27a0ec | 2350 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2351 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2352 | has_super = 1; |
0b8e58a1 | 2353 | |
617ba13b | 2354 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2355 | } |
2356 | ||
c9de560d AT |
2357 | /** |
2358 | * ext4_get_stripe_size: Get the stripe size. | |
2359 | * @sbi: In memory super block info | |
2360 | * | |
2361 | * If we have specified it via mount option, then | |
2362 | * use the mount option value. If the value specified at mount time is | |
2363 | * greater than the blocks per group use the super block value. | |
2364 | * If the super block value is greater than blocks per group return 0. | |
2365 | * Allocator needs it be less than blocks per group. | |
2366 | * | |
2367 | */ | |
2368 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2369 | { | |
2370 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2371 | unsigned long stripe_width = | |
2372 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2373 | ||
2374 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2375 | return sbi->s_stripe; | |
2376 | ||
2377 | if (stripe_width <= sbi->s_blocks_per_group) | |
2378 | return stripe_width; | |
2379 | ||
2380 | if (stride <= sbi->s_blocks_per_group) | |
2381 | return stride; | |
2382 | ||
2383 | return 0; | |
2384 | } | |
ac27a0ec | 2385 | |
3197ebdb TT |
2386 | /* sysfs supprt */ |
2387 | ||
2388 | struct ext4_attr { | |
2389 | struct attribute attr; | |
2390 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2391 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2392 | const char *, size_t); |
2393 | int offset; | |
2394 | }; | |
2395 | ||
2396 | static int parse_strtoul(const char *buf, | |
2397 | unsigned long max, unsigned long *value) | |
2398 | { | |
2399 | char *endp; | |
2400 | ||
e7d2860b AGR |
2401 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2402 | endp = skip_spaces(endp); | |
3197ebdb TT |
2403 | if (*endp || *value > max) |
2404 | return -EINVAL; | |
2405 | ||
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2410 | struct ext4_sb_info *sbi, | |
2411 | char *buf) | |
2412 | { | |
2413 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2414 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2415 | } | |
2416 | ||
2417 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2418 | struct ext4_sb_info *sbi, char *buf) | |
2419 | { | |
2420 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2421 | ||
f613dfcb TT |
2422 | if (!sb->s_bdev->bd_part) |
2423 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2424 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2425 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2426 | sbi->s_sectors_written_start) >> 1); | |
2427 | } | |
2428 | ||
2429 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2430 | struct ext4_sb_info *sbi, char *buf) | |
2431 | { | |
2432 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2433 | ||
f613dfcb TT |
2434 | if (!sb->s_bdev->bd_part) |
2435 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2436 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2437 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2438 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2439 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2440 | } |
2441 | ||
2442 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2443 | struct ext4_sb_info *sbi, | |
2444 | const char *buf, size_t count) | |
2445 | { | |
2446 | unsigned long t; | |
2447 | ||
2448 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2449 | return -EINVAL; | |
2450 | ||
5dbd571d | 2451 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2452 | return -EINVAL; |
2453 | ||
2454 | sbi->s_inode_readahead_blks = t; | |
2455 | return count; | |
2456 | } | |
2457 | ||
2458 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2459 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2460 | { |
2461 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2462 | ||
2463 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2464 | } | |
2465 | ||
2466 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2467 | struct ext4_sb_info *sbi, | |
2468 | const char *buf, size_t count) | |
2469 | { | |
2470 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2471 | unsigned long t; | |
2472 | ||
2473 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2474 | return -EINVAL; | |
2475 | *ui = t; | |
2476 | return count; | |
2477 | } | |
2478 | ||
2479 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2480 | static struct ext4_attr ext4_attr_##_name = { \ | |
2481 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2482 | .show = _show, \ | |
2483 | .store = _store, \ | |
2484 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2485 | } | |
2486 | #define EXT4_ATTR(name, mode, show, store) \ | |
2487 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2488 | ||
857ac889 | 2489 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2490 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2491 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2492 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2493 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2494 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2495 | ||
2496 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2497 | EXT4_RO_ATTR(session_write_kbytes); | |
2498 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2499 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2500 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2501 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2502 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2503 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2504 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2505 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2506 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2507 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2508 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2509 | |
2510 | static struct attribute *ext4_attrs[] = { | |
2511 | ATTR_LIST(delayed_allocation_blocks), | |
2512 | ATTR_LIST(session_write_kbytes), | |
2513 | ATTR_LIST(lifetime_write_kbytes), | |
2514 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2515 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2516 | ATTR_LIST(mb_stats), |
2517 | ATTR_LIST(mb_max_to_scan), | |
2518 | ATTR_LIST(mb_min_to_scan), | |
2519 | ATTR_LIST(mb_order2_req), | |
2520 | ATTR_LIST(mb_stream_req), | |
2521 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2522 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2523 | NULL, |
2524 | }; | |
2525 | ||
857ac889 LC |
2526 | /* Features this copy of ext4 supports */ |
2527 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2528 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2529 | |
2530 | static struct attribute *ext4_feat_attrs[] = { | |
2531 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2532 | ATTR_LIST(batched_discard), |
857ac889 LC |
2533 | NULL, |
2534 | }; | |
2535 | ||
3197ebdb TT |
2536 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2537 | struct attribute *attr, char *buf) | |
2538 | { | |
2539 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2540 | s_kobj); | |
2541 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2542 | ||
2543 | return a->show ? a->show(a, sbi, buf) : 0; | |
2544 | } | |
2545 | ||
2546 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2547 | struct attribute *attr, | |
2548 | const char *buf, size_t len) | |
2549 | { | |
2550 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2551 | s_kobj); | |
2552 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2553 | ||
2554 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2555 | } | |
2556 | ||
2557 | static void ext4_sb_release(struct kobject *kobj) | |
2558 | { | |
2559 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2560 | s_kobj); | |
2561 | complete(&sbi->s_kobj_unregister); | |
2562 | } | |
2563 | ||
52cf25d0 | 2564 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2565 | .show = ext4_attr_show, |
2566 | .store = ext4_attr_store, | |
2567 | }; | |
2568 | ||
2569 | static struct kobj_type ext4_ktype = { | |
2570 | .default_attrs = ext4_attrs, | |
2571 | .sysfs_ops = &ext4_attr_ops, | |
2572 | .release = ext4_sb_release, | |
2573 | }; | |
2574 | ||
857ac889 LC |
2575 | static void ext4_feat_release(struct kobject *kobj) |
2576 | { | |
2577 | complete(&ext4_feat->f_kobj_unregister); | |
2578 | } | |
2579 | ||
2580 | static struct kobj_type ext4_feat_ktype = { | |
2581 | .default_attrs = ext4_feat_attrs, | |
2582 | .sysfs_ops = &ext4_attr_ops, | |
2583 | .release = ext4_feat_release, | |
2584 | }; | |
2585 | ||
a13fb1a4 ES |
2586 | /* |
2587 | * Check whether this filesystem can be mounted based on | |
2588 | * the features present and the RDONLY/RDWR mount requested. | |
2589 | * Returns 1 if this filesystem can be mounted as requested, | |
2590 | * 0 if it cannot be. | |
2591 | */ | |
2592 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2593 | { | |
2594 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2595 | ext4_msg(sb, KERN_ERR, | |
2596 | "Couldn't mount because of " | |
2597 | "unsupported optional features (%x)", | |
2598 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2599 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2600 | return 0; | |
2601 | } | |
2602 | ||
2603 | if (readonly) | |
2604 | return 1; | |
2605 | ||
2606 | /* Check that feature set is OK for a read-write mount */ | |
2607 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2608 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2609 | "unsupported optional features (%x)", | |
2610 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2611 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2612 | return 0; | |
2613 | } | |
2614 | /* | |
2615 | * Large file size enabled file system can only be mounted | |
2616 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2617 | */ | |
2618 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2619 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2620 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2621 | "cannot be mounted RDWR without " | |
2622 | "CONFIG_LBDAF"); | |
2623 | return 0; | |
2624 | } | |
2625 | } | |
2626 | return 1; | |
2627 | } | |
2628 | ||
66e61a9e TT |
2629 | /* |
2630 | * This function is called once a day if we have errors logged | |
2631 | * on the file system | |
2632 | */ | |
2633 | static void print_daily_error_info(unsigned long arg) | |
2634 | { | |
2635 | struct super_block *sb = (struct super_block *) arg; | |
2636 | struct ext4_sb_info *sbi; | |
2637 | struct ext4_super_block *es; | |
2638 | ||
2639 | sbi = EXT4_SB(sb); | |
2640 | es = sbi->s_es; | |
2641 | ||
2642 | if (es->s_error_count) | |
2643 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2644 | le32_to_cpu(es->s_error_count)); | |
2645 | if (es->s_first_error_time) { | |
2646 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2647 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2648 | (int) sizeof(es->s_first_error_func), | |
2649 | es->s_first_error_func, | |
2650 | le32_to_cpu(es->s_first_error_line)); | |
2651 | if (es->s_first_error_ino) | |
2652 | printk(": inode %u", | |
2653 | le32_to_cpu(es->s_first_error_ino)); | |
2654 | if (es->s_first_error_block) | |
2655 | printk(": block %llu", (unsigned long long) | |
2656 | le64_to_cpu(es->s_first_error_block)); | |
2657 | printk("\n"); | |
2658 | } | |
2659 | if (es->s_last_error_time) { | |
2660 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2661 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2662 | (int) sizeof(es->s_last_error_func), | |
2663 | es->s_last_error_func, | |
2664 | le32_to_cpu(es->s_last_error_line)); | |
2665 | if (es->s_last_error_ino) | |
2666 | printk(": inode %u", | |
2667 | le32_to_cpu(es->s_last_error_ino)); | |
2668 | if (es->s_last_error_block) | |
2669 | printk(": block %llu", (unsigned long long) | |
2670 | le64_to_cpu(es->s_last_error_block)); | |
2671 | printk("\n"); | |
2672 | } | |
2673 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2674 | } | |
2675 | ||
bfff6873 LC |
2676 | /* Find next suitable group and run ext4_init_inode_table */ |
2677 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2678 | { | |
2679 | struct ext4_group_desc *gdp = NULL; | |
2680 | ext4_group_t group, ngroups; | |
2681 | struct super_block *sb; | |
2682 | unsigned long timeout = 0; | |
2683 | int ret = 0; | |
2684 | ||
2685 | sb = elr->lr_super; | |
2686 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2687 | ||
2688 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2689 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2690 | if (!gdp) { | |
2691 | ret = 1; | |
2692 | break; | |
2693 | } | |
2694 | ||
2695 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2696 | break; | |
2697 | } | |
2698 | ||
2699 | if (group == ngroups) | |
2700 | ret = 1; | |
2701 | ||
2702 | if (!ret) { | |
2703 | timeout = jiffies; | |
2704 | ret = ext4_init_inode_table(sb, group, | |
2705 | elr->lr_timeout ? 0 : 1); | |
2706 | if (elr->lr_timeout == 0) { | |
2707 | timeout = jiffies - timeout; | |
2708 | if (elr->lr_sbi->s_li_wait_mult) | |
2709 | timeout *= elr->lr_sbi->s_li_wait_mult; | |
2710 | else | |
2711 | timeout *= 20; | |
2712 | elr->lr_timeout = timeout; | |
2713 | } | |
2714 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2715 | elr->lr_next_group = group + 1; | |
2716 | } | |
2717 | ||
2718 | return ret; | |
2719 | } | |
2720 | ||
2721 | /* | |
2722 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2723 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2724 | */ |
2725 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2726 | { | |
2727 | struct ext4_sb_info *sbi; | |
2728 | ||
2729 | if (!elr) | |
2730 | return; | |
2731 | ||
2732 | sbi = elr->lr_sbi; | |
2733 | ||
2734 | list_del(&elr->lr_request); | |
2735 | sbi->s_li_request = NULL; | |
2736 | kfree(elr); | |
2737 | } | |
2738 | ||
2739 | static void ext4_unregister_li_request(struct super_block *sb) | |
2740 | { | |
2741 | struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; | |
2742 | ||
2743 | if (!ext4_li_info) | |
2744 | return; | |
2745 | ||
2746 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2747 | ext4_remove_li_request(elr); | |
2748 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2749 | } | |
2750 | ||
8f1f7453 ES |
2751 | static struct task_struct *ext4_lazyinit_task; |
2752 | ||
bfff6873 LC |
2753 | /* |
2754 | * This is the function where ext4lazyinit thread lives. It walks | |
2755 | * through the request list searching for next scheduled filesystem. | |
2756 | * When such a fs is found, run the lazy initialization request | |
2757 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2758 | * function. Based on that time we compute next schedule time of | |
2759 | * the request. When walking through the list is complete, compute | |
2760 | * next waking time and put itself into sleep. | |
2761 | */ | |
2762 | static int ext4_lazyinit_thread(void *arg) | |
2763 | { | |
2764 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2765 | struct list_head *pos, *n; | |
2766 | struct ext4_li_request *elr; | |
4ed5c033 | 2767 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2768 | |
2769 | BUG_ON(NULL == eli); | |
2770 | ||
bfff6873 LC |
2771 | cont_thread: |
2772 | while (true) { | |
2773 | next_wakeup = MAX_JIFFY_OFFSET; | |
2774 | ||
2775 | mutex_lock(&eli->li_list_mtx); | |
2776 | if (list_empty(&eli->li_request_list)) { | |
2777 | mutex_unlock(&eli->li_list_mtx); | |
2778 | goto exit_thread; | |
2779 | } | |
2780 | ||
2781 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2782 | elr = list_entry(pos, struct ext4_li_request, | |
2783 | lr_request); | |
2784 | ||
b2c78cd0 TT |
2785 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2786 | if (ext4_run_li_request(elr) != 0) { | |
2787 | /* error, remove the lazy_init job */ | |
2788 | ext4_remove_li_request(elr); | |
2789 | continue; | |
2790 | } | |
bfff6873 LC |
2791 | } |
2792 | ||
2793 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2794 | next_wakeup = elr->lr_next_sched; | |
2795 | } | |
2796 | mutex_unlock(&eli->li_list_mtx); | |
2797 | ||
2798 | if (freezing(current)) | |
2799 | refrigerator(); | |
2800 | ||
4ed5c033 LC |
2801 | cur = jiffies; |
2802 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2803 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2804 | cond_resched(); |
2805 | continue; | |
2806 | } | |
2807 | ||
4ed5c033 LC |
2808 | schedule_timeout_interruptible(next_wakeup - cur); |
2809 | ||
8f1f7453 ES |
2810 | if (kthread_should_stop()) { |
2811 | ext4_clear_request_list(); | |
2812 | goto exit_thread; | |
2813 | } | |
bfff6873 LC |
2814 | } |
2815 | ||
2816 | exit_thread: | |
2817 | /* | |
2818 | * It looks like the request list is empty, but we need | |
2819 | * to check it under the li_list_mtx lock, to prevent any | |
2820 | * additions into it, and of course we should lock ext4_li_mtx | |
2821 | * to atomically free the list and ext4_li_info, because at | |
2822 | * this point another ext4 filesystem could be registering | |
2823 | * new one. | |
2824 | */ | |
2825 | mutex_lock(&ext4_li_mtx); | |
2826 | mutex_lock(&eli->li_list_mtx); | |
2827 | if (!list_empty(&eli->li_request_list)) { | |
2828 | mutex_unlock(&eli->li_list_mtx); | |
2829 | mutex_unlock(&ext4_li_mtx); | |
2830 | goto cont_thread; | |
2831 | } | |
2832 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2833 | kfree(ext4_li_info); |
2834 | ext4_li_info = NULL; | |
2835 | mutex_unlock(&ext4_li_mtx); | |
2836 | ||
2837 | return 0; | |
2838 | } | |
2839 | ||
2840 | static void ext4_clear_request_list(void) | |
2841 | { | |
2842 | struct list_head *pos, *n; | |
2843 | struct ext4_li_request *elr; | |
2844 | ||
2845 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2846 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2847 | elr = list_entry(pos, struct ext4_li_request, | |
2848 | lr_request); | |
2849 | ext4_remove_li_request(elr); | |
2850 | } | |
2851 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2852 | } | |
2853 | ||
2854 | static int ext4_run_lazyinit_thread(void) | |
2855 | { | |
8f1f7453 ES |
2856 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2857 | ext4_li_info, "ext4lazyinit"); | |
2858 | if (IS_ERR(ext4_lazyinit_task)) { | |
2859 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2860 | ext4_clear_request_list(); |
bfff6873 LC |
2861 | kfree(ext4_li_info); |
2862 | ext4_li_info = NULL; | |
2863 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2864 | "initialization thread\n", | |
2865 | err); | |
2866 | return err; | |
2867 | } | |
2868 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2869 | return 0; |
2870 | } | |
2871 | ||
2872 | /* | |
2873 | * Check whether it make sense to run itable init. thread or not. | |
2874 | * If there is at least one uninitialized inode table, return | |
2875 | * corresponding group number, else the loop goes through all | |
2876 | * groups and return total number of groups. | |
2877 | */ | |
2878 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2879 | { | |
2880 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2881 | struct ext4_group_desc *gdp = NULL; | |
2882 | ||
2883 | for (group = 0; group < ngroups; group++) { | |
2884 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2885 | if (!gdp) | |
2886 | continue; | |
2887 | ||
2888 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2889 | break; | |
2890 | } | |
2891 | ||
2892 | return group; | |
2893 | } | |
2894 | ||
2895 | static int ext4_li_info_new(void) | |
2896 | { | |
2897 | struct ext4_lazy_init *eli = NULL; | |
2898 | ||
2899 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2900 | if (!eli) | |
2901 | return -ENOMEM; | |
2902 | ||
bfff6873 LC |
2903 | INIT_LIST_HEAD(&eli->li_request_list); |
2904 | mutex_init(&eli->li_list_mtx); | |
2905 | ||
bfff6873 LC |
2906 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2907 | ||
2908 | ext4_li_info = eli; | |
2909 | ||
2910 | return 0; | |
2911 | } | |
2912 | ||
2913 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2914 | ext4_group_t start) | |
2915 | { | |
2916 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2917 | struct ext4_li_request *elr; | |
2918 | unsigned long rnd; | |
2919 | ||
2920 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2921 | if (!elr) | |
2922 | return NULL; | |
2923 | ||
2924 | elr->lr_super = sb; | |
2925 | elr->lr_sbi = sbi; | |
2926 | elr->lr_next_group = start; | |
2927 | ||
2928 | /* | |
2929 | * Randomize first schedule time of the request to | |
2930 | * spread the inode table initialization requests | |
2931 | * better. | |
2932 | */ | |
2933 | get_random_bytes(&rnd, sizeof(rnd)); | |
2934 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2935 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2936 | ||
2937 | return elr; | |
2938 | } | |
2939 | ||
2940 | static int ext4_register_li_request(struct super_block *sb, | |
2941 | ext4_group_t first_not_zeroed) | |
2942 | { | |
2943 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2944 | struct ext4_li_request *elr; | |
2945 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 2946 | int ret = 0; |
bfff6873 LC |
2947 | |
2948 | if (sbi->s_li_request != NULL) | |
beed5ecb | 2949 | return 0; |
bfff6873 LC |
2950 | |
2951 | if (first_not_zeroed == ngroups || | |
2952 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 2953 | !test_opt(sb, INIT_INODE_TABLE)) |
beed5ecb | 2954 | return 0; |
bfff6873 LC |
2955 | |
2956 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
2957 | if (!elr) |
2958 | return -ENOMEM; | |
bfff6873 LC |
2959 | |
2960 | mutex_lock(&ext4_li_mtx); | |
2961 | ||
2962 | if (NULL == ext4_li_info) { | |
2963 | ret = ext4_li_info_new(); | |
2964 | if (ret) | |
2965 | goto out; | |
2966 | } | |
2967 | ||
2968 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2969 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2970 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2971 | ||
2972 | sbi->s_li_request = elr; | |
46e4690b TM |
2973 | /* |
2974 | * set elr to NULL here since it has been inserted to | |
2975 | * the request_list and the removal and free of it is | |
2976 | * handled by ext4_clear_request_list from now on. | |
2977 | */ | |
2978 | elr = NULL; | |
bfff6873 LC |
2979 | |
2980 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2981 | ret = ext4_run_lazyinit_thread(); | |
2982 | if (ret) | |
2983 | goto out; | |
2984 | } | |
bfff6873 | 2985 | out: |
beed5ecb NK |
2986 | mutex_unlock(&ext4_li_mtx); |
2987 | if (ret) | |
bfff6873 | 2988 | kfree(elr); |
bfff6873 LC |
2989 | return ret; |
2990 | } | |
2991 | ||
2992 | /* | |
2993 | * We do not need to lock anything since this is called on | |
2994 | * module unload. | |
2995 | */ | |
2996 | static void ext4_destroy_lazyinit_thread(void) | |
2997 | { | |
2998 | /* | |
2999 | * If thread exited earlier | |
3000 | * there's nothing to be done. | |
3001 | */ | |
8f1f7453 | 3002 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3003 | return; |
3004 | ||
8f1f7453 | 3005 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3006 | } |
3007 | ||
2b2d6d01 | 3008 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
3009 | __releases(kernel_lock) |
3010 | __acquires(kernel_lock) | |
ac27a0ec | 3011 | { |
d4c402d9 | 3012 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3013 | struct buffer_head *bh; |
617ba13b MC |
3014 | struct ext4_super_block *es = NULL; |
3015 | struct ext4_sb_info *sbi; | |
3016 | ext4_fsblk_t block; | |
3017 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3018 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3019 | unsigned long offset = 0; |
ac27a0ec DK |
3020 | unsigned long journal_devnum = 0; |
3021 | unsigned long def_mount_opts; | |
3022 | struct inode *root; | |
9f6200bb | 3023 | char *cp; |
0390131b | 3024 | const char *descr; |
dcc7dae3 | 3025 | int ret = -ENOMEM; |
ac27a0ec | 3026 | int blocksize; |
4ec11028 TT |
3027 | unsigned int db_count; |
3028 | unsigned int i; | |
f287a1a5 | 3029 | int needs_recovery, has_huge_files; |
bd81d8ee | 3030 | __u64 blocks_count; |
833f4077 | 3031 | int err; |
b3881f74 | 3032 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3033 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3034 | |
3035 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3036 | if (!sbi) | |
dcc7dae3 | 3037 | goto out_free_orig; |
705895b6 PE |
3038 | |
3039 | sbi->s_blockgroup_lock = | |
3040 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3041 | if (!sbi->s_blockgroup_lock) { | |
3042 | kfree(sbi); | |
dcc7dae3 | 3043 | goto out_free_orig; |
705895b6 | 3044 | } |
ac27a0ec DK |
3045 | sb->s_fs_info = sbi; |
3046 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3047 | sbi->s_resuid = EXT4_DEF_RESUID; |
3048 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3049 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3050 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3051 | if (sb->s_bdev->bd_part) |
3052 | sbi->s_sectors_written_start = | |
3053 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3054 | |
9f6200bb TT |
3055 | /* Cleanup superblock name */ |
3056 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3057 | *cp = '!'; | |
3058 | ||
dcc7dae3 | 3059 | ret = -EINVAL; |
617ba13b | 3060 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3061 | if (!blocksize) { |
b31e1552 | 3062 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3063 | goto out_fail; |
3064 | } | |
3065 | ||
3066 | /* | |
617ba13b | 3067 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3068 | * block sizes. We need to calculate the offset from buffer start. |
3069 | */ | |
617ba13b | 3070 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3071 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3072 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3073 | } else { |
70bbb3e0 | 3074 | logical_sb_block = sb_block; |
ac27a0ec DK |
3075 | } |
3076 | ||
70bbb3e0 | 3077 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3078 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3079 | goto out_fail; |
3080 | } | |
3081 | /* | |
3082 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3083 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3084 | */ |
617ba13b | 3085 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3086 | sbi->s_es = es; |
3087 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3088 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3089 | goto cantfind_ext4; | |
afc32f7e | 3090 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3091 | |
3092 | /* Set defaults before we parse the mount options */ | |
3093 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3094 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3095 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3096 | set_opt(sb, DEBUG); |
437ca0fd DM |
3097 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3098 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3099 | "2.6.38"); | |
fd8c37ec | 3100 | set_opt(sb, GRPID); |
437ca0fd | 3101 | } |
617ba13b | 3102 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3103 | set_opt(sb, NO_UID32); |
ea663336 | 3104 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3105 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3106 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3107 | #endif |
03010a33 | 3108 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3109 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3110 | #endif |
6fd7a467 | 3111 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3112 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3113 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3114 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3115 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3116 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3117 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3118 | |
3119 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3120 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3121 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3122 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3123 | else |
fd8c37ec | 3124 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3125 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3126 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3127 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3128 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3129 | |
3130 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3131 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3132 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3133 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3134 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3135 | |
8b67f04a | 3136 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3137 | set_opt(sb, BARRIER); |
ac27a0ec | 3138 | |
dd919b98 AK |
3139 | /* |
3140 | * enable delayed allocation by default | |
3141 | * Use -o nodelalloc to turn it off | |
3142 | */ | |
8b67f04a TT |
3143 | if (!IS_EXT3_SB(sb) && |
3144 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3145 | set_opt(sb, DELALLOC); |
dd919b98 | 3146 | |
8b67f04a TT |
3147 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3148 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3149 | ext4_msg(sb, KERN_WARNING, | |
3150 | "failed to parse options in superblock: %s", | |
3151 | sbi->s_es->s_mount_opts); | |
3152 | } | |
b3881f74 TT |
3153 | if (!parse_options((char *) data, sb, &journal_devnum, |
3154 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3155 | goto failed_mount; |
3156 | ||
3157 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3158 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3159 | |
617ba13b MC |
3160 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3161 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3162 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3163 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3164 | ext4_msg(sb, KERN_WARNING, |
3165 | "feature flags set on rev 0 fs, " | |
3166 | "running e2fsck is recommended"); | |
469108ff | 3167 | |
2035e776 TT |
3168 | if (IS_EXT2_SB(sb)) { |
3169 | if (ext2_feature_set_ok(sb)) | |
3170 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3171 | "using the ext4 subsystem"); | |
3172 | else { | |
3173 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3174 | "to feature incompatibilities"); | |
3175 | goto failed_mount; | |
3176 | } | |
3177 | } | |
3178 | ||
3179 | if (IS_EXT3_SB(sb)) { | |
3180 | if (ext3_feature_set_ok(sb)) | |
3181 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3182 | "using the ext4 subsystem"); | |
3183 | else { | |
3184 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3185 | "to feature incompatibilities"); | |
3186 | goto failed_mount; | |
3187 | } | |
3188 | } | |
3189 | ||
ac27a0ec DK |
3190 | /* |
3191 | * Check feature flags regardless of the revision level, since we | |
3192 | * previously didn't change the revision level when setting the flags, | |
3193 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3194 | */ | |
a13fb1a4 | 3195 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3196 | goto failed_mount; |
a13fb1a4 | 3197 | |
ac27a0ec DK |
3198 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
3199 | ||
617ba13b MC |
3200 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3201 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3202 | ext4_msg(sb, KERN_ERR, |
3203 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3204 | goto failed_mount; |
3205 | } | |
3206 | ||
ac27a0ec | 3207 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3208 | /* Validate the filesystem blocksize */ |
3209 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3210 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3211 | blocksize); |
ac27a0ec DK |
3212 | goto failed_mount; |
3213 | } | |
3214 | ||
2b2d6d01 | 3215 | brelse(bh); |
70bbb3e0 AM |
3216 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3217 | offset = do_div(logical_sb_block, blocksize); | |
3218 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3219 | if (!bh) { |
b31e1552 ES |
3220 | ext4_msg(sb, KERN_ERR, |
3221 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3222 | goto failed_mount; |
3223 | } | |
617ba13b | 3224 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3225 | sbi->s_es = es; |
617ba13b | 3226 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3227 | ext4_msg(sb, KERN_ERR, |
3228 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3229 | goto failed_mount; |
3230 | } | |
3231 | } | |
3232 | ||
a13fb1a4 ES |
3233 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3234 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3235 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3236 | has_huge_files); | |
3237 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3238 | |
617ba13b MC |
3239 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3240 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3241 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3242 | } else { |
3243 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3244 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3245 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3246 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3247 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3248 | ext4_msg(sb, KERN_ERR, |
3249 | "unsupported inode size: %d", | |
2b2d6d01 | 3250 | sbi->s_inode_size); |
ac27a0ec DK |
3251 | goto failed_mount; |
3252 | } | |
ef7f3835 KS |
3253 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3254 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3255 | } |
0b8e58a1 | 3256 | |
0d1ee42f AR |
3257 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3258 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3259 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3260 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3261 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3262 | ext4_msg(sb, KERN_ERR, |
3263 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3264 | sbi->s_desc_size); |
3265 | goto failed_mount; | |
3266 | } | |
3267 | } else | |
3268 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3269 | |
ac27a0ec | 3270 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3271 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3272 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3273 | goto cantfind_ext4; |
0b8e58a1 | 3274 | |
617ba13b | 3275 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3276 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3277 | goto cantfind_ext4; |
ac27a0ec DK |
3278 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3279 | sbi->s_inodes_per_block; | |
0d1ee42f | 3280 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3281 | sbi->s_sbh = bh; |
3282 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3283 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3284 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3285 | |
2b2d6d01 | 3286 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3287 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3288 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3289 | i = le32_to_cpu(es->s_flags); |
3290 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3291 | sbi->s_hash_unsigned = 3; | |
3292 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3293 | #ifdef __CHAR_UNSIGNED__ | |
3294 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3295 | sbi->s_hash_unsigned = 3; | |
3296 | #else | |
3297 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3298 | #endif | |
3299 | sb->s_dirt = 1; | |
3300 | } | |
ac27a0ec DK |
3301 | |
3302 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
3303 | ext4_msg(sb, KERN_ERR, |
3304 | "#blocks per group too big: %lu", | |
2b2d6d01 | 3305 | sbi->s_blocks_per_group); |
ac27a0ec DK |
3306 | goto failed_mount; |
3307 | } | |
ac27a0ec | 3308 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3309 | ext4_msg(sb, KERN_ERR, |
3310 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3311 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3312 | goto failed_mount; |
3313 | } | |
3314 | ||
bf43d84b ES |
3315 | /* |
3316 | * Test whether we have more sectors than will fit in sector_t, | |
3317 | * and whether the max offset is addressable by the page cache. | |
3318 | */ | |
5a9ae68a | 3319 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3320 | ext4_blocks_count(es)); |
5a9ae68a | 3321 | if (err) { |
b31e1552 | 3322 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3323 | " too large to mount safely on this system"); |
ac27a0ec | 3324 | if (sizeof(sector_t) < 8) |
90c699a9 | 3325 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3326 | ret = err; |
ac27a0ec DK |
3327 | goto failed_mount; |
3328 | } | |
3329 | ||
617ba13b MC |
3330 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3331 | goto cantfind_ext4; | |
e7c95593 | 3332 | |
0f2ddca6 FTN |
3333 | /* check blocks count against device size */ |
3334 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3335 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3336 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3337 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3338 | ext4_blocks_count(es), blocks_count); |
3339 | goto failed_mount; | |
3340 | } | |
3341 | ||
0b8e58a1 AD |
3342 | /* |
3343 | * It makes no sense for the first data block to be beyond the end | |
3344 | * of the filesystem. | |
3345 | */ | |
3346 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3347 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3348 | "block %u is beyond end of filesystem (%llu)", | |
3349 | le32_to_cpu(es->s_first_data_block), | |
3350 | ext4_blocks_count(es)); | |
e7c95593 ES |
3351 | goto failed_mount; |
3352 | } | |
bd81d8ee LV |
3353 | blocks_count = (ext4_blocks_count(es) - |
3354 | le32_to_cpu(es->s_first_data_block) + | |
3355 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3356 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3357 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3358 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3359 | "(block count %llu, first data block %u, " |
b31e1552 | 3360 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3361 | ext4_blocks_count(es), |
3362 | le32_to_cpu(es->s_first_data_block), | |
3363 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3364 | goto failed_mount; | |
3365 | } | |
bd81d8ee | 3366 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3367 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3368 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3369 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3370 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 3371 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
3372 | GFP_KERNEL); |
3373 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 3374 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3375 | goto failed_mount; |
3376 | } | |
3377 | ||
3244fcb1 | 3378 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
3379 | if (ext4_proc_root) |
3380 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 3381 | #endif |
240799cd | 3382 | |
705895b6 | 3383 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3384 | |
3385 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3386 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3387 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3388 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3389 | ext4_msg(sb, KERN_ERR, |
3390 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3391 | db_count = i; |
3392 | goto failed_mount2; | |
3393 | } | |
3394 | } | |
bfff6873 | 3395 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3396 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3397 | goto failed_mount2; |
3398 | } | |
772cb7c8 JS |
3399 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3400 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3401 | ext4_msg(sb, KERN_ERR, |
3402 | "unable to initialize " | |
3403 | "flex_bg meta info!"); | |
772cb7c8 JS |
3404 | goto failed_mount2; |
3405 | } | |
3406 | ||
ac27a0ec DK |
3407 | sbi->s_gdb_count = db_count; |
3408 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3409 | spin_lock_init(&sbi->s_next_gen_lock); | |
3410 | ||
04496411 TM |
3411 | init_timer(&sbi->s_err_report); |
3412 | sbi->s_err_report.function = print_daily_error_info; | |
3413 | sbi->s_err_report.data = (unsigned long) sb; | |
3414 | ||
ce7e010a TT |
3415 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
3416 | ext4_count_free_blocks(sb)); | |
3417 | if (!err) { | |
3418 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3419 | ext4_count_free_inodes(sb)); | |
3420 | } | |
3421 | if (!err) { | |
3422 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3423 | ext4_count_dirs(sb)); | |
3424 | } | |
3425 | if (!err) { | |
3426 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
3427 | } | |
3428 | if (err) { | |
3429 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3430 | goto failed_mount3; | |
3431 | } | |
3432 | ||
c9de560d | 3433 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3434 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3435 | |
ac27a0ec DK |
3436 | /* |
3437 | * set up enough so that it can read an inode | |
3438 | */ | |
9ca92389 TT |
3439 | if (!test_opt(sb, NOLOAD) && |
3440 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3441 | sb->s_op = &ext4_sops; | |
3442 | else | |
3443 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3444 | sb->s_export_op = &ext4_export_ops; |
3445 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3446 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3447 | sb->s_qcop = &ext4_qctl_operations; |
3448 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec | 3449 | #endif |
f2fa2ffc AK |
3450 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3451 | ||
ac27a0ec | 3452 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3453 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 3454 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
3455 | |
3456 | sb->s_root = NULL; | |
3457 | ||
3458 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3459 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3460 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
3461 | |
3462 | /* | |
3463 | * The first inode we look at is the journal inode. Don't try | |
3464 | * root first: it may be modified in the journal! | |
3465 | */ | |
3466 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3467 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3468 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3469 | goto failed_mount3; |
0390131b FM |
3470 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3471 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3472 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3473 | "suppressed and not mounted read-only"); | |
744692dc | 3474 | goto failed_mount_wq; |
ac27a0ec | 3475 | } else { |
fd8c37ec TT |
3476 | clear_opt(sb, DATA_FLAGS); |
3477 | set_opt(sb, WRITEBACK_DATA); | |
0390131b FM |
3478 | sbi->s_journal = NULL; |
3479 | needs_recovery = 0; | |
3480 | goto no_journal; | |
ac27a0ec DK |
3481 | } |
3482 | ||
eb40a09c JS |
3483 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3484 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3485 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3486 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3487 | goto failed_mount_wq; |
eb40a09c JS |
3488 | } |
3489 | ||
d4da6c9c LT |
3490 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3491 | jbd2_journal_set_features(sbi->s_journal, | |
3492 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3493 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3494 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3495 | jbd2_journal_set_features(sbi->s_journal, | |
3496 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3497 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3498 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3499 | } else { |
3500 | jbd2_journal_clear_features(sbi->s_journal, | |
3501 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3502 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3503 | } | |
818d276c | 3504 | |
ac27a0ec DK |
3505 | /* We have now updated the journal if required, so we can |
3506 | * validate the data journaling mode. */ | |
3507 | switch (test_opt(sb, DATA_FLAGS)) { | |
3508 | case 0: | |
3509 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3510 | * capabilities: ORDERED_DATA if the journal can |
3511 | * cope, else JOURNAL_DATA | |
3512 | */ | |
dab291af MC |
3513 | if (jbd2_journal_check_available_features |
3514 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3515 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3516 | else |
fd8c37ec | 3517 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3518 | break; |
3519 | ||
617ba13b MC |
3520 | case EXT4_MOUNT_ORDERED_DATA: |
3521 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3522 | if (!jbd2_journal_check_available_features |
3523 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3524 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3525 | "requested data journaling mode"); | |
744692dc | 3526 | goto failed_mount_wq; |
ac27a0ec DK |
3527 | } |
3528 | default: | |
3529 | break; | |
3530 | } | |
b3881f74 | 3531 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3532 | |
ce7e010a TT |
3533 | /* |
3534 | * The journal may have updated the bg summary counts, so we | |
3535 | * need to update the global counters. | |
3536 | */ | |
3537 | percpu_counter_set(&sbi->s_freeblocks_counter, | |
3538 | ext4_count_free_blocks(sb)); | |
3539 | percpu_counter_set(&sbi->s_freeinodes_counter, | |
3540 | ext4_count_free_inodes(sb)); | |
3541 | percpu_counter_set(&sbi->s_dirs_counter, | |
3542 | ext4_count_dirs(sb)); | |
3543 | percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); | |
206f7ab4 | 3544 | |
ce7e010a | 3545 | no_journal: |
fd89d5f2 TH |
3546 | /* |
3547 | * The maximum number of concurrent works can be high and | |
3548 | * concurrency isn't really necessary. Limit it to 1. | |
3549 | */ | |
3550 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3551 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3552 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3553 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3554 | goto failed_mount_wq; | |
3555 | } | |
3556 | ||
ac27a0ec | 3557 | /* |
dab291af | 3558 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3559 | * so we can safely mount the rest of the filesystem now. |
3560 | */ | |
3561 | ||
1d1fe1ee DH |
3562 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3563 | if (IS_ERR(root)) { | |
b31e1552 | 3564 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3565 | ret = PTR_ERR(root); |
32a9bb57 | 3566 | root = NULL; |
ac27a0ec DK |
3567 | goto failed_mount4; |
3568 | } | |
3569 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3570 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3571 | goto failed_mount4; |
3572 | } | |
1d1fe1ee DH |
3573 | sb->s_root = d_alloc_root(root); |
3574 | if (!sb->s_root) { | |
b31e1552 | 3575 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3576 | ret = -ENOMEM; |
3577 | goto failed_mount4; | |
3578 | } | |
ac27a0ec | 3579 | |
2b2d6d01 | 3580 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3581 | |
3582 | /* determine the minimum size of new large inodes, if present */ | |
3583 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3584 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3585 | EXT4_GOOD_OLD_INODE_SIZE; | |
3586 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3587 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3588 | if (sbi->s_want_extra_isize < | |
3589 | le16_to_cpu(es->s_want_extra_isize)) | |
3590 | sbi->s_want_extra_isize = | |
3591 | le16_to_cpu(es->s_want_extra_isize); | |
3592 | if (sbi->s_want_extra_isize < | |
3593 | le16_to_cpu(es->s_min_extra_isize)) | |
3594 | sbi->s_want_extra_isize = | |
3595 | le16_to_cpu(es->s_min_extra_isize); | |
3596 | } | |
3597 | } | |
3598 | /* Check if enough inode space is available */ | |
3599 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3600 | sbi->s_inode_size) { | |
3601 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3602 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3603 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3604 | "available"); | |
ef7f3835 KS |
3605 | } |
3606 | ||
90576c0b TT |
3607 | if (test_opt(sb, DELALLOC) && |
3608 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
3609 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
3610 | "requested data journaling mode"); | |
fd8c37ec | 3611 | clear_opt(sb, DELALLOC); |
90576c0b | 3612 | } |
744692dc JZ |
3613 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
3614 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
3615 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3616 | "option - requested data journaling mode"); | |
fd8c37ec | 3617 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3618 | } |
3619 | if (sb->s_blocksize < PAGE_SIZE) { | |
3620 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3621 | "option - block size is too small"); | |
fd8c37ec | 3622 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3623 | } |
3624 | } | |
c2774d84 | 3625 | |
6fd058f7 TT |
3626 | err = ext4_setup_system_zone(sb); |
3627 | if (err) { | |
b31e1552 | 3628 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3629 | "zone (%d)", err); |
6fd058f7 TT |
3630 | goto failed_mount4; |
3631 | } | |
3632 | ||
c2774d84 AK |
3633 | ext4_ext_init(sb); |
3634 | err = ext4_mb_init(sb, needs_recovery); | |
3635 | if (err) { | |
421f91d2 | 3636 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3637 | err); |
c2774d84 AK |
3638 | goto failed_mount4; |
3639 | } | |
3640 | ||
bfff6873 LC |
3641 | err = ext4_register_li_request(sb, first_not_zeroed); |
3642 | if (err) | |
3643 | goto failed_mount4; | |
3644 | ||
3197ebdb TT |
3645 | sbi->s_kobj.kset = ext4_kset; |
3646 | init_completion(&sbi->s_kobj_unregister); | |
3647 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3648 | "%s", sb->s_id); | |
3649 | if (err) { | |
3650 | ext4_mb_release(sb); | |
3651 | ext4_ext_release(sb); | |
3652 | goto failed_mount4; | |
3653 | }; | |
3654 | ||
617ba13b MC |
3655 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3656 | ext4_orphan_cleanup(sb, es); | |
3657 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3658 | if (needs_recovery) { |
b31e1552 | 3659 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3660 | ext4_mark_recovery_complete(sb, es); |
3661 | } | |
3662 | if (EXT4_SB(sb)->s_journal) { | |
3663 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3664 | descr = " journalled data mode"; | |
3665 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3666 | descr = " ordered data mode"; | |
3667 | else | |
3668 | descr = " writeback data mode"; | |
3669 | } else | |
3670 | descr = "out journal"; | |
3671 | ||
d4c402d9 | 3672 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3673 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3674 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3675 | |
66e61a9e TT |
3676 | if (es->s_error_count) |
3677 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3678 | |
d4c402d9 | 3679 | kfree(orig_data); |
ac27a0ec DK |
3680 | return 0; |
3681 | ||
617ba13b | 3682 | cantfind_ext4: |
ac27a0ec | 3683 | if (!silent) |
b31e1552 | 3684 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3685 | goto failed_mount; |
3686 | ||
3687 | failed_mount4: | |
32a9bb57 MK |
3688 | iput(root); |
3689 | sb->s_root = NULL; | |
b31e1552 | 3690 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3691 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3692 | failed_mount_wq: | |
6fd058f7 | 3693 | ext4_release_system_zone(sb); |
0390131b FM |
3694 | if (sbi->s_journal) { |
3695 | jbd2_journal_destroy(sbi->s_journal); | |
3696 | sbi->s_journal = NULL; | |
3697 | } | |
ac27a0ec | 3698 | failed_mount3: |
04496411 | 3699 | del_timer(&sbi->s_err_report); |
c5ca7c76 TT |
3700 | if (sbi->s_flex_groups) { |
3701 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3702 | vfree(sbi->s_flex_groups); | |
3703 | else | |
3704 | kfree(sbi->s_flex_groups); | |
3705 | } | |
ce7e010a TT |
3706 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3707 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3708 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3709 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
ac27a0ec DK |
3710 | failed_mount2: |
3711 | for (i = 0; i < db_count; i++) | |
3712 | brelse(sbi->s_group_desc[i]); | |
3713 | kfree(sbi->s_group_desc); | |
3714 | failed_mount: | |
240799cd | 3715 | if (sbi->s_proc) { |
9f6200bb | 3716 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3717 | } |
ac27a0ec DK |
3718 | #ifdef CONFIG_QUOTA |
3719 | for (i = 0; i < MAXQUOTAS; i++) | |
3720 | kfree(sbi->s_qf_names[i]); | |
3721 | #endif | |
617ba13b | 3722 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3723 | brelse(bh); |
3724 | out_fail: | |
3725 | sb->s_fs_info = NULL; | |
f6830165 | 3726 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3727 | kfree(sbi); |
dcc7dae3 | 3728 | out_free_orig: |
d4c402d9 | 3729 | kfree(orig_data); |
1d1fe1ee | 3730 | return ret; |
ac27a0ec DK |
3731 | } |
3732 | ||
3733 | /* | |
3734 | * Setup any per-fs journal parameters now. We'll do this both on | |
3735 | * initial mount, once the journal has been initialised but before we've | |
3736 | * done any recovery; and again on any subsequent remount. | |
3737 | */ | |
617ba13b | 3738 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3739 | { |
617ba13b | 3740 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3741 | |
30773840 TT |
3742 | journal->j_commit_interval = sbi->s_commit_interval; |
3743 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3744 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3745 | |
a931da6a | 3746 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3747 | if (test_opt(sb, BARRIER)) |
dab291af | 3748 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3749 | else |
dab291af | 3750 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3751 | if (test_opt(sb, DATA_ERR_ABORT)) |
3752 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3753 | else | |
3754 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3755 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3756 | } |
3757 | ||
617ba13b | 3758 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3759 | unsigned int journal_inum) |
3760 | { | |
3761 | struct inode *journal_inode; | |
3762 | journal_t *journal; | |
3763 | ||
0390131b FM |
3764 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3765 | ||
ac27a0ec DK |
3766 | /* First, test for the existence of a valid inode on disk. Bad |
3767 | * things happen if we iget() an unused inode, as the subsequent | |
3768 | * iput() will try to delete it. */ | |
3769 | ||
1d1fe1ee DH |
3770 | journal_inode = ext4_iget(sb, journal_inum); |
3771 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3772 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3773 | return NULL; |
3774 | } | |
3775 | if (!journal_inode->i_nlink) { | |
3776 | make_bad_inode(journal_inode); | |
3777 | iput(journal_inode); | |
b31e1552 | 3778 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3779 | return NULL; |
3780 | } | |
3781 | ||
e5f8eab8 | 3782 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3783 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3784 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3785 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3786 | iput(journal_inode); |
3787 | return NULL; | |
3788 | } | |
3789 | ||
dab291af | 3790 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3791 | if (!journal) { |
b31e1552 | 3792 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3793 | iput(journal_inode); |
3794 | return NULL; | |
3795 | } | |
3796 | journal->j_private = sb; | |
617ba13b | 3797 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3798 | return journal; |
3799 | } | |
3800 | ||
617ba13b | 3801 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3802 | dev_t j_dev) |
3803 | { | |
2b2d6d01 | 3804 | struct buffer_head *bh; |
ac27a0ec | 3805 | journal_t *journal; |
617ba13b MC |
3806 | ext4_fsblk_t start; |
3807 | ext4_fsblk_t len; | |
ac27a0ec | 3808 | int hblock, blocksize; |
617ba13b | 3809 | ext4_fsblk_t sb_block; |
ac27a0ec | 3810 | unsigned long offset; |
2b2d6d01 | 3811 | struct ext4_super_block *es; |
ac27a0ec DK |
3812 | struct block_device *bdev; |
3813 | ||
0390131b FM |
3814 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3815 | ||
b31e1552 | 3816 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3817 | if (bdev == NULL) |
3818 | return NULL; | |
3819 | ||
ac27a0ec | 3820 | blocksize = sb->s_blocksize; |
e1defc4f | 3821 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3822 | if (blocksize < hblock) { |
b31e1552 ES |
3823 | ext4_msg(sb, KERN_ERR, |
3824 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3825 | goto out_bdev; |
3826 | } | |
3827 | ||
617ba13b MC |
3828 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3829 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3830 | set_blocksize(bdev, blocksize); |
3831 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3832 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3833 | "external journal"); | |
ac27a0ec DK |
3834 | goto out_bdev; |
3835 | } | |
3836 | ||
617ba13b MC |
3837 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3838 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3839 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3840 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3841 | ext4_msg(sb, KERN_ERR, "external journal has " |
3842 | "bad superblock"); | |
ac27a0ec DK |
3843 | brelse(bh); |
3844 | goto out_bdev; | |
3845 | } | |
3846 | ||
617ba13b | 3847 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3848 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3849 | brelse(bh); |
3850 | goto out_bdev; | |
3851 | } | |
3852 | ||
bd81d8ee | 3853 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3854 | start = sb_block + 1; |
3855 | brelse(bh); /* we're done with the superblock */ | |
3856 | ||
dab291af | 3857 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3858 | start, len, blocksize); |
3859 | if (!journal) { | |
b31e1552 | 3860 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3861 | goto out_bdev; |
3862 | } | |
3863 | journal->j_private = sb; | |
3864 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3865 | wait_on_buffer(journal->j_sb_buffer); | |
3866 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3867 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3868 | goto out_journal; |
3869 | } | |
3870 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3871 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3872 | "user (unsupported) - %d", | |
ac27a0ec DK |
3873 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3874 | goto out_journal; | |
3875 | } | |
617ba13b MC |
3876 | EXT4_SB(sb)->journal_bdev = bdev; |
3877 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3878 | return journal; |
0b8e58a1 | 3879 | |
ac27a0ec | 3880 | out_journal: |
dab291af | 3881 | jbd2_journal_destroy(journal); |
ac27a0ec | 3882 | out_bdev: |
617ba13b | 3883 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3884 | return NULL; |
3885 | } | |
3886 | ||
617ba13b MC |
3887 | static int ext4_load_journal(struct super_block *sb, |
3888 | struct ext4_super_block *es, | |
ac27a0ec DK |
3889 | unsigned long journal_devnum) |
3890 | { | |
3891 | journal_t *journal; | |
3892 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3893 | dev_t journal_dev; | |
3894 | int err = 0; | |
3895 | int really_read_only; | |
3896 | ||
0390131b FM |
3897 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3898 | ||
ac27a0ec DK |
3899 | if (journal_devnum && |
3900 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3901 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3902 | "numbers have changed"); | |
ac27a0ec DK |
3903 | journal_dev = new_decode_dev(journal_devnum); |
3904 | } else | |
3905 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3906 | ||
3907 | really_read_only = bdev_read_only(sb->s_bdev); | |
3908 | ||
3909 | /* | |
3910 | * Are we loading a blank journal or performing recovery after a | |
3911 | * crash? For recovery, we need to check in advance whether we | |
3912 | * can get read-write access to the device. | |
3913 | */ | |
617ba13b | 3914 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3915 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3916 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3917 | "required on readonly filesystem"); | |
ac27a0ec | 3918 | if (really_read_only) { |
b31e1552 ES |
3919 | ext4_msg(sb, KERN_ERR, "write access " |
3920 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3921 | return -EROFS; |
3922 | } | |
b31e1552 ES |
3923 | ext4_msg(sb, KERN_INFO, "write access will " |
3924 | "be enabled during recovery"); | |
ac27a0ec DK |
3925 | } |
3926 | } | |
3927 | ||
3928 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3929 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3930 | "and inode journals!"); | |
ac27a0ec DK |
3931 | return -EINVAL; |
3932 | } | |
3933 | ||
3934 | if (journal_inum) { | |
617ba13b | 3935 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3936 | return -EINVAL; |
3937 | } else { | |
617ba13b | 3938 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3939 | return -EINVAL; |
3940 | } | |
3941 | ||
90576c0b | 3942 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3943 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3944 | |
ac27a0ec | 3945 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3946 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3947 | if (err) { |
b31e1552 | 3948 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3949 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3950 | return err; |
3951 | } | |
3952 | } | |
3953 | ||
617ba13b | 3954 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3955 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
3956 | if (!err) { |
3957 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
3958 | if (save) | |
3959 | memcpy(save, ((char *) es) + | |
3960 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 3961 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
3962 | if (save) |
3963 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
3964 | save, EXT4_S_ERR_LEN); | |
3965 | kfree(save); | |
3966 | } | |
ac27a0ec DK |
3967 | |
3968 | if (err) { | |
b31e1552 | 3969 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3970 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3971 | return err; |
3972 | } | |
3973 | ||
617ba13b MC |
3974 | EXT4_SB(sb)->s_journal = journal; |
3975 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3976 | |
c41303ce | 3977 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
3978 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
3979 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3980 | |
3981 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3982 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3983 | } |
3984 | ||
3985 | return 0; | |
3986 | } | |
3987 | ||
e2d67052 | 3988 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3989 | { |
e2d67052 | 3990 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3991 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3992 | int error = 0; |
ac27a0ec DK |
3993 | |
3994 | if (!sbh) | |
c4be0c1d | 3995 | return error; |
914258bf TT |
3996 | if (buffer_write_io_error(sbh)) { |
3997 | /* | |
3998 | * Oh, dear. A previous attempt to write the | |
3999 | * superblock failed. This could happen because the | |
4000 | * USB device was yanked out. Or it could happen to | |
4001 | * be a transient write error and maybe the block will | |
4002 | * be remapped. Nothing we can do but to retry the | |
4003 | * write and hope for the best. | |
4004 | */ | |
b31e1552 ES |
4005 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4006 | "superblock detected"); | |
914258bf TT |
4007 | clear_buffer_write_io_error(sbh); |
4008 | set_buffer_uptodate(sbh); | |
4009 | } | |
71290b36 TT |
4010 | /* |
4011 | * If the file system is mounted read-only, don't update the | |
4012 | * superblock write time. This avoids updating the superblock | |
4013 | * write time when we are mounting the root file system | |
4014 | * read/only but we need to replay the journal; at that point, | |
4015 | * for people who are east of GMT and who make their clock | |
4016 | * tick in localtime for Windows bug-for-bug compatibility, | |
4017 | * the clock is set in the future, and this will cause e2fsck | |
4018 | * to complain and force a full file system check. | |
4019 | */ | |
4020 | if (!(sb->s_flags & MS_RDONLY)) | |
4021 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4022 | if (sb->s_bdev->bd_part) |
4023 | es->s_kbytes_written = | |
4024 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4025 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4026 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4027 | else |
4028 | es->s_kbytes_written = | |
4029 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
ce7e010a TT |
4030 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
4031 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
4032 | es->s_free_inodes_count = | |
4033 | cpu_to_le32(percpu_counter_sum_positive( | |
4034 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4035 | sb->s_dirt = 0; |
ac27a0ec DK |
4036 | BUFFER_TRACE(sbh, "marking dirty"); |
4037 | mark_buffer_dirty(sbh); | |
914258bf | 4038 | if (sync) { |
c4be0c1d TS |
4039 | error = sync_dirty_buffer(sbh); |
4040 | if (error) | |
4041 | return error; | |
4042 | ||
4043 | error = buffer_write_io_error(sbh); | |
4044 | if (error) { | |
b31e1552 ES |
4045 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4046 | "superblock"); | |
914258bf TT |
4047 | clear_buffer_write_io_error(sbh); |
4048 | set_buffer_uptodate(sbh); | |
4049 | } | |
4050 | } | |
c4be0c1d | 4051 | return error; |
ac27a0ec DK |
4052 | } |
4053 | ||
ac27a0ec DK |
4054 | /* |
4055 | * Have we just finished recovery? If so, and if we are mounting (or | |
4056 | * remounting) the filesystem readonly, then we will end up with a | |
4057 | * consistent fs on disk. Record that fact. | |
4058 | */ | |
2b2d6d01 TT |
4059 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4060 | struct ext4_super_block *es) | |
ac27a0ec | 4061 | { |
617ba13b | 4062 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4063 | |
0390131b FM |
4064 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4065 | BUG_ON(journal != NULL); | |
4066 | return; | |
4067 | } | |
dab291af | 4068 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4069 | if (jbd2_journal_flush(journal) < 0) |
4070 | goto out; | |
4071 | ||
617ba13b | 4072 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4073 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4074 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4075 | ext4_commit_super(sb, 1); |
ac27a0ec | 4076 | } |
7ffe1ea8 HK |
4077 | |
4078 | out: | |
dab291af | 4079 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4080 | } |
4081 | ||
4082 | /* | |
4083 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4084 | * has recorded an error from a previous lifetime, move that error to the | |
4085 | * main filesystem now. | |
4086 | */ | |
2b2d6d01 TT |
4087 | static void ext4_clear_journal_err(struct super_block *sb, |
4088 | struct ext4_super_block *es) | |
ac27a0ec DK |
4089 | { |
4090 | journal_t *journal; | |
4091 | int j_errno; | |
4092 | const char *errstr; | |
4093 | ||
0390131b FM |
4094 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4095 | ||
617ba13b | 4096 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4097 | |
4098 | /* | |
4099 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4100 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4101 | */ |
4102 | ||
dab291af | 4103 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4104 | if (j_errno) { |
4105 | char nbuf[16]; | |
4106 | ||
617ba13b | 4107 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4108 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4109 | "from previous mount: %s", errstr); |
12062ddd | 4110 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4111 | |
617ba13b MC |
4112 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4113 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4114 | ext4_commit_super(sb, 1); |
ac27a0ec | 4115 | |
dab291af | 4116 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4117 | } |
4118 | } | |
4119 | ||
4120 | /* | |
4121 | * Force the running and committing transactions to commit, | |
4122 | * and wait on the commit. | |
4123 | */ | |
617ba13b | 4124 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4125 | { |
4126 | journal_t *journal; | |
0390131b | 4127 | int ret = 0; |
ac27a0ec DK |
4128 | |
4129 | if (sb->s_flags & MS_RDONLY) | |
4130 | return 0; | |
4131 | ||
617ba13b | 4132 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4133 | if (journal) { |
437f88cc | 4134 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4135 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4136 | } |
0390131b | 4137 | |
ac27a0ec DK |
4138 | return ret; |
4139 | } | |
4140 | ||
2b2d6d01 | 4141 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4142 | { |
ebc1ac16 | 4143 | lock_super(sb); |
9ca92389 | 4144 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4145 | unlock_super(sb); |
ac27a0ec DK |
4146 | } |
4147 | ||
617ba13b | 4148 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4149 | { |
14ce0cb4 | 4150 | int ret = 0; |
9eddacf9 | 4151 | tid_t target; |
8d5d02e6 | 4152 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4153 | |
9bffad1e | 4154 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4155 | flush_workqueue(sbi->dio_unwritten_wq); |
4156 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4157 | if (wait) |
8d5d02e6 | 4158 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4159 | } |
14ce0cb4 | 4160 | return ret; |
ac27a0ec DK |
4161 | } |
4162 | ||
4163 | /* | |
4164 | * LVM calls this function before a (read-only) snapshot is created. This | |
4165 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4166 | * |
4167 | * Note that only this function cannot bring a filesystem to be in a clean | |
4168 | * state independently, because ext4 prevents a new handle from being started | |
4169 | * by @sb->s_frozen, which stays in an upper layer. It thus needs help from | |
4170 | * the upper layer. | |
ac27a0ec | 4171 | */ |
c4be0c1d | 4172 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4173 | { |
c4be0c1d TS |
4174 | int error = 0; |
4175 | journal_t *journal; | |
ac27a0ec | 4176 | |
9ca92389 TT |
4177 | if (sb->s_flags & MS_RDONLY) |
4178 | return 0; | |
ac27a0ec | 4179 | |
9ca92389 | 4180 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4181 | |
9ca92389 TT |
4182 | /* Now we set up the journal barrier. */ |
4183 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4184 | |
9ca92389 TT |
4185 | /* |
4186 | * Don't clear the needs_recovery flag if we failed to flush | |
4187 | * the journal. | |
4188 | */ | |
4189 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4190 | if (error < 0) |
4191 | goto out; | |
9ca92389 TT |
4192 | |
4193 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4194 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4195 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4196 | out: |
4197 | /* we rely on s_frozen to stop further updates */ | |
4198 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4199 | return error; | |
ac27a0ec DK |
4200 | } |
4201 | ||
4202 | /* | |
4203 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4204 | * flag here, even though the filesystem is not technically dirty yet. | |
4205 | */ | |
c4be0c1d | 4206 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4207 | { |
9ca92389 TT |
4208 | if (sb->s_flags & MS_RDONLY) |
4209 | return 0; | |
4210 | ||
4211 | lock_super(sb); | |
4212 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4213 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4214 | ext4_commit_super(sb, 1); | |
4215 | unlock_super(sb); | |
c4be0c1d | 4216 | return 0; |
ac27a0ec DK |
4217 | } |
4218 | ||
673c6100 TT |
4219 | /* |
4220 | * Structure to save mount options for ext4_remount's benefit | |
4221 | */ | |
4222 | struct ext4_mount_options { | |
4223 | unsigned long s_mount_opt; | |
a2595b8a | 4224 | unsigned long s_mount_opt2; |
673c6100 TT |
4225 | uid_t s_resuid; |
4226 | gid_t s_resgid; | |
4227 | unsigned long s_commit_interval; | |
4228 | u32 s_min_batch_time, s_max_batch_time; | |
4229 | #ifdef CONFIG_QUOTA | |
4230 | int s_jquota_fmt; | |
4231 | char *s_qf_names[MAXQUOTAS]; | |
4232 | #endif | |
4233 | }; | |
4234 | ||
2b2d6d01 | 4235 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4236 | { |
2b2d6d01 | 4237 | struct ext4_super_block *es; |
617ba13b MC |
4238 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4239 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4240 | unsigned long old_sb_flags; |
617ba13b | 4241 | struct ext4_mount_options old_opts; |
c79d967d | 4242 | int enable_quota = 0; |
8a266467 | 4243 | ext4_group_t g; |
b3881f74 | 4244 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
4245 | int err; |
4246 | #ifdef CONFIG_QUOTA | |
4247 | int i; | |
4248 | #endif | |
d4c402d9 | 4249 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4250 | |
4251 | /* Store the original options */ | |
bbd6851a | 4252 | lock_super(sb); |
ac27a0ec DK |
4253 | old_sb_flags = sb->s_flags; |
4254 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4255 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4256 | old_opts.s_resuid = sbi->s_resuid; |
4257 | old_opts.s_resgid = sbi->s_resgid; | |
4258 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4259 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4260 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4261 | #ifdef CONFIG_QUOTA |
4262 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4263 | for (i = 0; i < MAXQUOTAS; i++) | |
4264 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4265 | #endif | |
b3881f74 TT |
4266 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4267 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4268 | |
4269 | /* | |
4270 | * Allow the "check" option to be passed as a remount option. | |
4271 | */ | |
b3881f74 TT |
4272 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4273 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4274 | err = -EINVAL; |
4275 | goto restore_opts; | |
4276 | } | |
4277 | ||
4ab2f15b | 4278 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4279 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4280 | |
4281 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4282 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4283 | |
4284 | es = sbi->s_es; | |
4285 | ||
b3881f74 | 4286 | if (sbi->s_journal) { |
0390131b | 4287 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4288 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4289 | } | |
ac27a0ec DK |
4290 | |
4291 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4292 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4293 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4294 | err = -EROFS; |
4295 | goto restore_opts; | |
4296 | } | |
4297 | ||
4298 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4299 | err = dquot_suspend(sb, -1); |
4300 | if (err < 0) | |
c79d967d | 4301 | goto restore_opts; |
c79d967d | 4302 | |
ac27a0ec DK |
4303 | /* |
4304 | * First of all, the unconditional stuff we have to do | |
4305 | * to disable replay of the journal when we next remount | |
4306 | */ | |
4307 | sb->s_flags |= MS_RDONLY; | |
4308 | ||
4309 | /* | |
4310 | * OK, test if we are remounting a valid rw partition | |
4311 | * readonly, and if so set the rdonly flag and then | |
4312 | * mark the partition as valid again. | |
4313 | */ | |
617ba13b MC |
4314 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4315 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4316 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4317 | ||
a63c9eb2 | 4318 | if (sbi->s_journal) |
0390131b | 4319 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4320 | } else { |
a13fb1a4 ES |
4321 | /* Make sure we can mount this feature set readwrite */ |
4322 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4323 | err = -EROFS; |
4324 | goto restore_opts; | |
4325 | } | |
8a266467 TT |
4326 | /* |
4327 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4328 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4329 | */ |
4330 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4331 | struct ext4_group_desc *gdp = | |
4332 | ext4_get_group_desc(sb, g, NULL); | |
4333 | ||
4334 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4335 | ext4_msg(sb, KERN_ERR, |
4336 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4337 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4338 | le16_to_cpu(gdp->bg_checksum)); | |
4339 | err = -EINVAL; | |
4340 | goto restore_opts; | |
4341 | } | |
4342 | } | |
4343 | ||
ead6596b ES |
4344 | /* |
4345 | * If we have an unprocessed orphan list hanging | |
4346 | * around from a previously readonly bdev mount, | |
4347 | * require a full umount/remount for now. | |
4348 | */ | |
4349 | if (es->s_last_orphan) { | |
b31e1552 | 4350 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4351 | "remount RDWR because of unprocessed " |
4352 | "orphan inode list. Please " | |
b31e1552 | 4353 | "umount/remount instead"); |
ead6596b ES |
4354 | err = -EINVAL; |
4355 | goto restore_opts; | |
4356 | } | |
4357 | ||
ac27a0ec DK |
4358 | /* |
4359 | * Mounting a RDONLY partition read-write, so reread | |
4360 | * and store the current valid flag. (It may have | |
4361 | * been changed by e2fsck since we originally mounted | |
4362 | * the partition.) | |
4363 | */ | |
0390131b FM |
4364 | if (sbi->s_journal) |
4365 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4366 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4367 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4368 | goto restore_opts; |
2b2d6d01 | 4369 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4370 | sb->s_flags &= ~MS_RDONLY; |
c79d967d | 4371 | enable_quota = 1; |
ac27a0ec DK |
4372 | } |
4373 | } | |
bfff6873 LC |
4374 | |
4375 | /* | |
4376 | * Reinitialize lazy itable initialization thread based on | |
4377 | * current settings | |
4378 | */ | |
4379 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4380 | ext4_unregister_li_request(sb); | |
4381 | else { | |
4382 | ext4_group_t first_not_zeroed; | |
4383 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4384 | ext4_register_li_request(sb, first_not_zeroed); | |
4385 | } | |
4386 | ||
6fd058f7 | 4387 | ext4_setup_system_zone(sb); |
0390131b | 4388 | if (sbi->s_journal == NULL) |
e2d67052 | 4389 | ext4_commit_super(sb, 1); |
0390131b | 4390 | |
ac27a0ec DK |
4391 | #ifdef CONFIG_QUOTA |
4392 | /* Release old quota file names */ | |
4393 | for (i = 0; i < MAXQUOTAS; i++) | |
4394 | if (old_opts.s_qf_names[i] && | |
4395 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4396 | kfree(old_opts.s_qf_names[i]); | |
4397 | #endif | |
bbd6851a | 4398 | unlock_super(sb); |
c79d967d | 4399 | if (enable_quota) |
0f0dd62f | 4400 | dquot_resume(sb, -1); |
d4c402d9 CW |
4401 | |
4402 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4403 | kfree(orig_data); | |
ac27a0ec | 4404 | return 0; |
0b8e58a1 | 4405 | |
ac27a0ec DK |
4406 | restore_opts: |
4407 | sb->s_flags = old_sb_flags; | |
4408 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4409 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4410 | sbi->s_resuid = old_opts.s_resuid; |
4411 | sbi->s_resgid = old_opts.s_resgid; | |
4412 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4413 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4414 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4415 | #ifdef CONFIG_QUOTA |
4416 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4417 | for (i = 0; i < MAXQUOTAS; i++) { | |
4418 | if (sbi->s_qf_names[i] && | |
4419 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4420 | kfree(sbi->s_qf_names[i]); | |
4421 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4422 | } | |
4423 | #endif | |
bbd6851a | 4424 | unlock_super(sb); |
d4c402d9 | 4425 | kfree(orig_data); |
ac27a0ec DK |
4426 | return err; |
4427 | } | |
4428 | ||
2b2d6d01 | 4429 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4430 | { |
4431 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4432 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4433 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 4434 | u64 fsid; |
ac27a0ec | 4435 | |
5e70030d BP |
4436 | if (test_opt(sb, MINIX_DF)) { |
4437 | sbi->s_overhead_last = 0; | |
6bc9feff | 4438 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4439 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4440 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4441 | |
4442 | /* | |
5e70030d BP |
4443 | * Compute the overhead (FS structures). This is constant |
4444 | * for a given filesystem unless the number of block groups | |
4445 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4446 | */ |
4447 | ||
4448 | /* | |
4449 | * All of the blocks before first_data_block are | |
4450 | * overhead | |
4451 | */ | |
4452 | overhead = le32_to_cpu(es->s_first_data_block); | |
4453 | ||
4454 | /* | |
4455 | * Add the overhead attributed to the superblock and | |
4456 | * block group descriptors. If the sparse superblocks | |
4457 | * feature is turned on, then not all groups have this. | |
4458 | */ | |
4459 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
4460 | overhead += ext4_bg_has_super(sb, i) + |
4461 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
4462 | cond_resched(); |
4463 | } | |
4464 | ||
4465 | /* | |
4466 | * Every block group has an inode bitmap, a block | |
4467 | * bitmap, and an inode table. | |
4468 | */ | |
5e70030d BP |
4469 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
4470 | sbi->s_overhead_last = overhead; | |
4471 | smp_wmb(); | |
6bc9feff | 4472 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4473 | } |
4474 | ||
617ba13b | 4475 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4476 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 4477 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
4478 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
4479 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
4480 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4481 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4482 | buf->f_bavail = 0; |
4483 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4484 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4485 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4486 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4487 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4488 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4489 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4490 | |
ac27a0ec DK |
4491 | return 0; |
4492 | } | |
4493 | ||
0b8e58a1 AD |
4494 | /* Helper function for writing quotas on sync - we need to start transaction |
4495 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4496 | * Process 1 Process 2 |
617ba13b | 4497 | * ext4_create() quota_sync() |
a269eb18 | 4498 | * jbd2_journal_start() write_dquot() |
871a2931 | 4499 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4500 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4501 | * |
4502 | */ | |
4503 | ||
4504 | #ifdef CONFIG_QUOTA | |
4505 | ||
4506 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4507 | { | |
4508 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4509 | } | |
4510 | ||
617ba13b | 4511 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4512 | { |
4513 | int ret, err; | |
4514 | handle_t *handle; | |
4515 | struct inode *inode; | |
4516 | ||
4517 | inode = dquot_to_inode(dquot); | |
617ba13b | 4518 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4519 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4520 | if (IS_ERR(handle)) |
4521 | return PTR_ERR(handle); | |
4522 | ret = dquot_commit(dquot); | |
617ba13b | 4523 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4524 | if (!ret) |
4525 | ret = err; | |
4526 | return ret; | |
4527 | } | |
4528 | ||
617ba13b | 4529 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4530 | { |
4531 | int ret, err; | |
4532 | handle_t *handle; | |
4533 | ||
617ba13b | 4534 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4535 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4536 | if (IS_ERR(handle)) |
4537 | return PTR_ERR(handle); | |
4538 | ret = dquot_acquire(dquot); | |
617ba13b | 4539 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4540 | if (!ret) |
4541 | ret = err; | |
4542 | return ret; | |
4543 | } | |
4544 | ||
617ba13b | 4545 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4546 | { |
4547 | int ret, err; | |
4548 | handle_t *handle; | |
4549 | ||
617ba13b | 4550 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4551 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4552 | if (IS_ERR(handle)) { |
4553 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4554 | dquot_release(dquot); | |
ac27a0ec | 4555 | return PTR_ERR(handle); |
9c3013e9 | 4556 | } |
ac27a0ec | 4557 | ret = dquot_release(dquot); |
617ba13b | 4558 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4559 | if (!ret) |
4560 | ret = err; | |
4561 | return ret; | |
4562 | } | |
4563 | ||
617ba13b | 4564 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4565 | { |
2c8be6b2 | 4566 | /* Are we journaling quotas? */ |
617ba13b MC |
4567 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4568 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4569 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4570 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4571 | } else { |
4572 | return dquot_mark_dquot_dirty(dquot); | |
4573 | } | |
4574 | } | |
4575 | ||
617ba13b | 4576 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4577 | { |
4578 | int ret, err; | |
4579 | handle_t *handle; | |
4580 | ||
4581 | /* Data block + inode block */ | |
617ba13b | 4582 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4583 | if (IS_ERR(handle)) |
4584 | return PTR_ERR(handle); | |
4585 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4586 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4587 | if (!ret) |
4588 | ret = err; | |
4589 | return ret; | |
4590 | } | |
4591 | ||
4592 | /* | |
4593 | * Turn on quotas during mount time - we need to find | |
4594 | * the quota file and such... | |
4595 | */ | |
617ba13b | 4596 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4597 | { |
287a8095 CH |
4598 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4599 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4600 | } |
4601 | ||
4602 | /* | |
4603 | * Standard function to be called on quota_on | |
4604 | */ | |
617ba13b | 4605 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4606 | struct path *path) |
ac27a0ec DK |
4607 | { |
4608 | int err; | |
ac27a0ec DK |
4609 | |
4610 | if (!test_opt(sb, QUOTA)) | |
4611 | return -EINVAL; | |
0623543b | 4612 | |
ac27a0ec | 4613 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 4614 | if (path->mnt->mnt_sb != sb) |
ac27a0ec | 4615 | return -EXDEV; |
0623543b JK |
4616 | /* Journaling quota? */ |
4617 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4618 | /* Quotafile not in fs root? */ |
f00c9e44 | 4619 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4620 | ext4_msg(sb, KERN_WARNING, |
4621 | "Quota file not on filesystem root. " | |
4622 | "Journaled quota will not work"); | |
2b2d6d01 | 4623 | } |
0623543b JK |
4624 | |
4625 | /* | |
4626 | * When we journal data on quota file, we have to flush journal to see | |
4627 | * all updates to the file when we bypass pagecache... | |
4628 | */ | |
0390131b | 4629 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4630 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4631 | /* |
4632 | * We don't need to lock updates but journal_flush() could | |
4633 | * otherwise be livelocked... | |
4634 | */ | |
4635 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4636 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4637 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4638 | if (err) |
7ffe1ea8 | 4639 | return err; |
0623543b JK |
4640 | } |
4641 | ||
f00c9e44 | 4642 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4643 | } |
4644 | ||
ca0e05e4 DM |
4645 | static int ext4_quota_off(struct super_block *sb, int type) |
4646 | { | |
21f97697 JK |
4647 | struct inode *inode = sb_dqopt(sb)->files[type]; |
4648 | handle_t *handle; | |
4649 | ||
87009d86 DM |
4650 | /* Force all delayed allocation blocks to be allocated. |
4651 | * Caller already holds s_umount sem */ | |
4652 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4653 | sync_filesystem(sb); |
ca0e05e4 | 4654 | |
0b268590 AG |
4655 | if (!inode) |
4656 | goto out; | |
4657 | ||
21f97697 JK |
4658 | /* Update modification times of quota files when userspace can |
4659 | * start looking at them */ | |
4660 | handle = ext4_journal_start(inode, 1); | |
4661 | if (IS_ERR(handle)) | |
4662 | goto out; | |
4663 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
4664 | ext4_mark_inode_dirty(handle, inode); | |
4665 | ext4_journal_stop(handle); | |
4666 | ||
4667 | out: | |
ca0e05e4 DM |
4668 | return dquot_quota_off(sb, type); |
4669 | } | |
4670 | ||
ac27a0ec DK |
4671 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4672 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 4673 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 4674 | * we don't have to be afraid of races */ |
617ba13b | 4675 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4676 | size_t len, loff_t off) |
4677 | { | |
4678 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4679 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4680 | int err = 0; |
4681 | int offset = off & (sb->s_blocksize - 1); | |
4682 | int tocopy; | |
4683 | size_t toread; | |
4684 | struct buffer_head *bh; | |
4685 | loff_t i_size = i_size_read(inode); | |
4686 | ||
4687 | if (off > i_size) | |
4688 | return 0; | |
4689 | if (off+len > i_size) | |
4690 | len = i_size-off; | |
4691 | toread = len; | |
4692 | while (toread > 0) { | |
4693 | tocopy = sb->s_blocksize - offset < toread ? | |
4694 | sb->s_blocksize - offset : toread; | |
617ba13b | 4695 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4696 | if (err) |
4697 | return err; | |
4698 | if (!bh) /* A hole? */ | |
4699 | memset(data, 0, tocopy); | |
4700 | else | |
4701 | memcpy(data, bh->b_data+offset, tocopy); | |
4702 | brelse(bh); | |
4703 | offset = 0; | |
4704 | toread -= tocopy; | |
4705 | data += tocopy; | |
4706 | blk++; | |
4707 | } | |
4708 | return len; | |
4709 | } | |
4710 | ||
4711 | /* Write to quotafile (we know the transaction is already started and has | |
4712 | * enough credits) */ | |
617ba13b | 4713 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4714 | const char *data, size_t len, loff_t off) |
4715 | { | |
4716 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4717 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4718 | int err = 0; |
4719 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4720 | struct buffer_head *bh; |
4721 | handle_t *handle = journal_current_handle(); | |
4722 | ||
0390131b | 4723 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4724 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4725 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4726 | (unsigned long long)off, (unsigned long long)len); |
4727 | return -EIO; | |
4728 | } | |
67eeb568 DM |
4729 | /* |
4730 | * Since we account only one data block in transaction credits, | |
4731 | * then it is impossible to cross a block boundary. | |
4732 | */ | |
4733 | if (sb->s_blocksize - offset < len) { | |
4734 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4735 | " cancelled because not block aligned", | |
4736 | (unsigned long long)off, (unsigned long long)len); | |
4737 | return -EIO; | |
4738 | } | |
4739 | ||
ac27a0ec | 4740 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4741 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4742 | if (!bh) | |
4743 | goto out; | |
62d2b5f2 JK |
4744 | err = ext4_journal_get_write_access(handle, bh); |
4745 | if (err) { | |
4746 | brelse(bh); | |
4747 | goto out; | |
ac27a0ec | 4748 | } |
67eeb568 DM |
4749 | lock_buffer(bh); |
4750 | memcpy(bh->b_data+offset, data, len); | |
4751 | flush_dcache_page(bh->b_page); | |
4752 | unlock_buffer(bh); | |
62d2b5f2 | 4753 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4754 | brelse(bh); |
ac27a0ec | 4755 | out: |
67eeb568 | 4756 | if (err) { |
4d04e4fb | 4757 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4758 | return err; |
4d04e4fb | 4759 | } |
67eeb568 DM |
4760 | if (inode->i_size < off + len) { |
4761 | i_size_write(inode, off + len); | |
617ba13b | 4762 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 4763 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4764 | } |
ac27a0ec | 4765 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4766 | return len; |
ac27a0ec DK |
4767 | } |
4768 | ||
4769 | #endif | |
4770 | ||
152a0836 AV |
4771 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4772 | const char *dev_name, void *data) | |
ac27a0ec | 4773 | { |
152a0836 | 4774 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4775 | } |
4776 | ||
37f328eb | 4777 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4778 | static inline void register_as_ext2(void) |
4779 | { | |
4780 | int err = register_filesystem(&ext2_fs_type); | |
4781 | if (err) | |
4782 | printk(KERN_WARNING | |
4783 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4784 | } | |
4785 | ||
4786 | static inline void unregister_as_ext2(void) | |
4787 | { | |
4788 | unregister_filesystem(&ext2_fs_type); | |
4789 | } | |
2035e776 TT |
4790 | |
4791 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
4792 | { | |
4793 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
4794 | return 0; | |
4795 | if (sb->s_flags & MS_RDONLY) | |
4796 | return 1; | |
4797 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
4798 | return 0; | |
4799 | return 1; | |
4800 | } | |
51b7e3c9 | 4801 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4802 | #else |
4803 | static inline void register_as_ext2(void) { } | |
4804 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 4805 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4806 | #endif |
4807 | ||
37f328eb | 4808 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4809 | static inline void register_as_ext3(void) |
4810 | { | |
4811 | int err = register_filesystem(&ext3_fs_type); | |
4812 | if (err) | |
4813 | printk(KERN_WARNING | |
4814 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4815 | } | |
4816 | ||
4817 | static inline void unregister_as_ext3(void) | |
4818 | { | |
4819 | unregister_filesystem(&ext3_fs_type); | |
4820 | } | |
2035e776 TT |
4821 | |
4822 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
4823 | { | |
4824 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
4825 | return 0; | |
4826 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
4827 | return 0; | |
4828 | if (sb->s_flags & MS_RDONLY) | |
4829 | return 1; | |
4830 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
4831 | return 0; | |
4832 | return 1; | |
4833 | } | |
51b7e3c9 | 4834 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4835 | #else |
4836 | static inline void register_as_ext3(void) { } | |
4837 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 4838 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
4839 | #endif |
4840 | ||
03010a33 TT |
4841 | static struct file_system_type ext4_fs_type = { |
4842 | .owner = THIS_MODULE, | |
4843 | .name = "ext4", | |
152a0836 | 4844 | .mount = ext4_mount, |
03010a33 TT |
4845 | .kill_sb = kill_block_super, |
4846 | .fs_flags = FS_REQUIRES_DEV, | |
4847 | }; | |
4848 | ||
8f021222 | 4849 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
4850 | { |
4851 | struct ext4_features *ef; | |
4852 | int ret = -ENOMEM; | |
4853 | ||
4854 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
4855 | if (!ef) | |
4856 | goto out; | |
4857 | ||
4858 | ef->f_kobj.kset = ext4_kset; | |
4859 | init_completion(&ef->f_kobj_unregister); | |
4860 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
4861 | "features"); | |
4862 | if (ret) { | |
4863 | kfree(ef); | |
4864 | goto out; | |
4865 | } | |
4866 | ||
4867 | ext4_feat = ef; | |
4868 | ret = 0; | |
4869 | out: | |
4870 | return ret; | |
4871 | } | |
4872 | ||
8f021222 LC |
4873 | static void ext4_exit_feat_adverts(void) |
4874 | { | |
4875 | kobject_put(&ext4_feat->f_kobj); | |
4876 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
4877 | kfree(ext4_feat); | |
4878 | } | |
4879 | ||
e9e3bcec ES |
4880 | /* Shared across all ext4 file systems */ |
4881 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
4882 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
4883 | ||
5dabfc78 | 4884 | static int __init ext4_init_fs(void) |
ac27a0ec | 4885 | { |
e9e3bcec | 4886 | int i, err; |
c9de560d | 4887 | |
12e9b892 | 4888 | ext4_check_flag_values(); |
e9e3bcec ES |
4889 | |
4890 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
4891 | mutex_init(&ext4__aio_mutex[i]); | |
4892 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
4893 | } | |
4894 | ||
5dabfc78 | 4895 | err = ext4_init_pageio(); |
6fd058f7 TT |
4896 | if (err) |
4897 | return err; | |
5dabfc78 | 4898 | err = ext4_init_system_zone(); |
bd2d0210 | 4899 | if (err) |
dd68314c | 4900 | goto out7; |
3197ebdb TT |
4901 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4902 | if (!ext4_kset) | |
dd68314c | 4903 | goto out6; |
9f6200bb | 4904 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
dd68314c TT |
4905 | if (!ext4_proc_root) |
4906 | goto out5; | |
857ac889 LC |
4907 | |
4908 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
4909 | if (err) |
4910 | goto out4; | |
857ac889 | 4911 | |
5dabfc78 | 4912 | err = ext4_init_mballoc(); |
ac27a0ec | 4913 | if (err) |
6fd058f7 | 4914 | goto out3; |
c9de560d | 4915 | |
5dabfc78 | 4916 | err = ext4_init_xattr(); |
c9de560d AT |
4917 | if (err) |
4918 | goto out2; | |
ac27a0ec DK |
4919 | err = init_inodecache(); |
4920 | if (err) | |
4921 | goto out1; | |
24b58424 | 4922 | register_as_ext3(); |
2035e776 | 4923 | register_as_ext2(); |
03010a33 | 4924 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4925 | if (err) |
4926 | goto out; | |
bfff6873 LC |
4927 | |
4928 | ext4_li_info = NULL; | |
4929 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
4930 | return 0; |
4931 | out: | |
24b58424 TT |
4932 | unregister_as_ext2(); |
4933 | unregister_as_ext3(); | |
ac27a0ec DK |
4934 | destroy_inodecache(); |
4935 | out1: | |
5dabfc78 | 4936 | ext4_exit_xattr(); |
c9de560d | 4937 | out2: |
5dabfc78 | 4938 | ext4_exit_mballoc(); |
6fd058f7 | 4939 | out3: |
8f021222 | 4940 | ext4_exit_feat_adverts(); |
dd68314c | 4941 | out4: |
6fd058f7 | 4942 | remove_proc_entry("fs/ext4", NULL); |
dd68314c | 4943 | out5: |
6fd058f7 | 4944 | kset_unregister(ext4_kset); |
dd68314c | 4945 | out6: |
5dabfc78 | 4946 | ext4_exit_system_zone(); |
dd68314c | 4947 | out7: |
5dabfc78 | 4948 | ext4_exit_pageio(); |
ac27a0ec DK |
4949 | return err; |
4950 | } | |
4951 | ||
5dabfc78 | 4952 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 4953 | { |
bfff6873 | 4954 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
4955 | unregister_as_ext2(); |
4956 | unregister_as_ext3(); | |
03010a33 | 4957 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4958 | destroy_inodecache(); |
5dabfc78 TT |
4959 | ext4_exit_xattr(); |
4960 | ext4_exit_mballoc(); | |
8f021222 | 4961 | ext4_exit_feat_adverts(); |
9f6200bb | 4962 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4963 | kset_unregister(ext4_kset); |
5dabfc78 TT |
4964 | ext4_exit_system_zone(); |
4965 | ext4_exit_pageio(); | |
ac27a0ec DK |
4966 | } |
4967 | ||
4968 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4969 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4970 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
4971 | module_init(ext4_init_fs) |
4972 | module_exit(ext4_exit_fs) |