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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> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/parser.h> | |
ac27a0ec | 28 | #include <linux/buffer_head.h> |
a5694255 | 29 | #include <linux/exportfs.h> |
ac27a0ec DK |
30 | #include <linux/vfs.h> |
31 | #include <linux/random.h> | |
32 | #include <linux/mount.h> | |
33 | #include <linux/namei.h> | |
34 | #include <linux/quotaops.h> | |
35 | #include <linux/seq_file.h> | |
9f6200bb | 36 | #include <linux/proc_fs.h> |
3197ebdb | 37 | #include <linux/ctype.h> |
1330593e | 38 | #include <linux/log2.h> |
717d50e4 | 39 | #include <linux/crc16.h> |
7abc52c2 | 40 | #include <linux/cleancache.h> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 | 46 | #include "ext4.h" |
4a092d73 | 47 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 48 | #include "ext4_jbd2.h" |
ac27a0ec DK |
49 | #include "xattr.h" |
50 | #include "acl.h" | |
3661d286 | 51 | #include "mballoc.h" |
ac27a0ec | 52 | |
9bffad1e TT |
53 | #define CREATE_TRACE_POINTS |
54 | #include <trace/events/ext4.h> | |
55 | ||
1f109d5a | 56 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 57 | static struct kset *ext4_kset; |
0b75a840 LC |
58 | static struct ext4_lazy_init *ext4_li_info; |
59 | static struct mutex ext4_li_mtx; | |
60 | static struct ext4_features *ext4_feat; | |
9c191f70 | 61 | static int ext4_mballoc_ready; |
9f6200bb | 62 | |
617ba13b | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 64 | unsigned long journal_devnum); |
2adf6da8 | 65 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 66 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
67 | static void ext4_mark_recovery_complete(struct super_block *sb, |
68 | struct ext4_super_block *es); | |
69 | static void ext4_clear_journal_err(struct super_block *sb, | |
70 | struct ext4_super_block *es); | |
617ba13b | 71 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 TT |
72 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
73 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 74 | static int ext4_unfreeze(struct super_block *sb); |
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); |
27dd4385 | 84 | static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); |
ac27a0ec | 85 | |
2035e776 TT |
86 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
87 | static struct file_system_type ext2_fs_type = { | |
88 | .owner = THIS_MODULE, | |
89 | .name = "ext2", | |
90 | .mount = ext4_mount, | |
91 | .kill_sb = kill_block_super, | |
92 | .fs_flags = FS_REQUIRES_DEV, | |
93 | }; | |
7f78e035 | 94 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 95 | MODULE_ALIAS("ext2"); |
2035e776 TT |
96 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
97 | #else | |
98 | #define IS_EXT2_SB(sb) (0) | |
99 | #endif | |
100 | ||
101 | ||
ba69f9ab JK |
102 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
103 | static struct file_system_type ext3_fs_type = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = "ext3", | |
152a0836 | 106 | .mount = ext4_mount, |
ba69f9ab JK |
107 | .kill_sb = kill_block_super, |
108 | .fs_flags = FS_REQUIRES_DEV, | |
109 | }; | |
7f78e035 | 110 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 111 | MODULE_ALIAS("ext3"); |
ba69f9ab JK |
112 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
113 | #else | |
114 | #define IS_EXT3_SB(sb) (0) | |
115 | #endif | |
bd81d8ee | 116 | |
d25425f8 DW |
117 | static int ext4_verify_csum_type(struct super_block *sb, |
118 | struct ext4_super_block *es) | |
119 | { | |
120 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
121 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
122 | return 1; | |
123 | ||
124 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
125 | } | |
126 | ||
a9c47317 DW |
127 | static __le32 ext4_superblock_csum(struct super_block *sb, |
128 | struct ext4_super_block *es) | |
129 | { | |
130 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
131 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
132 | __u32 csum; | |
133 | ||
134 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
135 | ||
136 | return cpu_to_le32(csum); | |
137 | } | |
138 | ||
c197855e SH |
139 | static int ext4_superblock_csum_verify(struct super_block *sb, |
140 | struct ext4_super_block *es) | |
a9c47317 | 141 | { |
9aa5d32b | 142 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
143 | return 1; |
144 | ||
145 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
146 | } | |
147 | ||
06db49e6 | 148 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 149 | { |
06db49e6 TT |
150 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
151 | ||
9aa5d32b | 152 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
153 | return; |
154 | ||
155 | es->s_checksum = ext4_superblock_csum(sb, es); | |
156 | } | |
157 | ||
9933fc0a TT |
158 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
159 | { | |
160 | void *ret; | |
161 | ||
8be04b93 | 162 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
163 | if (!ret) |
164 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
165 | return ret; | |
166 | } | |
167 | ||
168 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
169 | { | |
170 | void *ret; | |
171 | ||
8be04b93 | 172 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
173 | if (!ret) |
174 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
175 | return ret; | |
176 | } | |
177 | ||
8fadc143 AR |
178 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
179 | struct ext4_group_desc *bg) | |
bd81d8ee | 180 | { |
3a14589c | 181 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 182 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 183 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
184 | } |
185 | ||
8fadc143 AR |
186 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
187 | struct ext4_group_desc *bg) | |
bd81d8ee | 188 | { |
5272f837 | 189 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 190 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 191 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
192 | } |
193 | ||
8fadc143 AR |
194 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
195 | struct ext4_group_desc *bg) | |
bd81d8ee | 196 | { |
5272f837 | 197 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 198 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 199 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
200 | } |
201 | ||
021b65bb TT |
202 | __u32 ext4_free_group_clusters(struct super_block *sb, |
203 | struct ext4_group_desc *bg) | |
560671a0 AK |
204 | { |
205 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
206 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 207 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
208 | } |
209 | ||
210 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
211 | struct ext4_group_desc *bg) | |
212 | { | |
213 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
214 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 215 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
216 | } |
217 | ||
218 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
219 | struct ext4_group_desc *bg) | |
220 | { | |
221 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
222 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 223 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
224 | } |
225 | ||
226 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
227 | struct ext4_group_desc *bg) | |
228 | { | |
229 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
230 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 231 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
232 | } |
233 | ||
8fadc143 AR |
234 | void ext4_block_bitmap_set(struct super_block *sb, |
235 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 236 | { |
3a14589c | 237 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
238 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
239 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
240 | } |
241 | ||
8fadc143 AR |
242 | void ext4_inode_bitmap_set(struct super_block *sb, |
243 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 244 | { |
5272f837 | 245 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
246 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
247 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
248 | } |
249 | ||
8fadc143 AR |
250 | void ext4_inode_table_set(struct super_block *sb, |
251 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 252 | { |
5272f837 | 253 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
254 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
255 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
256 | } |
257 | ||
021b65bb TT |
258 | void ext4_free_group_clusters_set(struct super_block *sb, |
259 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
260 | { |
261 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
262 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
263 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
264 | } | |
265 | ||
266 | void ext4_free_inodes_set(struct super_block *sb, | |
267 | struct ext4_group_desc *bg, __u32 count) | |
268 | { | |
269 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
270 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
271 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
272 | } | |
273 | ||
274 | void ext4_used_dirs_set(struct super_block *sb, | |
275 | struct ext4_group_desc *bg, __u32 count) | |
276 | { | |
277 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
278 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
279 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
280 | } | |
281 | ||
282 | void ext4_itable_unused_set(struct super_block *sb, | |
283 | struct ext4_group_desc *bg, __u32 count) | |
284 | { | |
285 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
286 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
287 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
288 | } | |
289 | ||
d3d1faf6 | 290 | |
1c13d5c0 TT |
291 | static void __save_error_info(struct super_block *sb, const char *func, |
292 | unsigned int line) | |
293 | { | |
294 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
295 | ||
296 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
1b46617b TT |
297 | if (bdev_read_only(sb->s_bdev)) |
298 | return; | |
1c13d5c0 TT |
299 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
300 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
301 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
302 | es->s_last_error_line = cpu_to_le32(line); | |
303 | if (!es->s_first_error_time) { | |
304 | es->s_first_error_time = es->s_last_error_time; | |
305 | strncpy(es->s_first_error_func, func, | |
306 | sizeof(es->s_first_error_func)); | |
307 | es->s_first_error_line = cpu_to_le32(line); | |
308 | es->s_first_error_ino = es->s_last_error_ino; | |
309 | es->s_first_error_block = es->s_last_error_block; | |
310 | } | |
66e61a9e TT |
311 | /* |
312 | * Start the daily error reporting function if it hasn't been | |
313 | * started already | |
314 | */ | |
315 | if (!es->s_error_count) | |
316 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 317 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
318 | } |
319 | ||
320 | static void save_error_info(struct super_block *sb, const char *func, | |
321 | unsigned int line) | |
322 | { | |
323 | __save_error_info(sb, func, line); | |
324 | ext4_commit_super(sb, 1); | |
325 | } | |
326 | ||
18aadd47 BJ |
327 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
328 | { | |
329 | struct super_block *sb = journal->j_private; | |
330 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
331 | int error = is_journal_aborted(journal); | |
5d3ee208 | 332 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 333 | |
5d3ee208 | 334 | BUG_ON(txn->t_state == T_FINISHED); |
18aadd47 | 335 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
336 | while (!list_empty(&txn->t_private_list)) { |
337 | jce = list_entry(txn->t_private_list.next, | |
338 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
339 | list_del_init(&jce->jce_list); |
340 | spin_unlock(&sbi->s_md_lock); | |
341 | jce->jce_func(sb, jce, error); | |
342 | spin_lock(&sbi->s_md_lock); | |
343 | } | |
344 | spin_unlock(&sbi->s_md_lock); | |
345 | } | |
1c13d5c0 | 346 | |
ac27a0ec DK |
347 | /* Deal with the reporting of failure conditions on a filesystem such as |
348 | * inconsistencies detected or read IO failures. | |
349 | * | |
350 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 351 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
352 | * write ordering constraints on the superblock which prevent us from |
353 | * writing it out straight away; and given that the journal is about to | |
354 | * be aborted, we can't rely on the current, or future, transactions to | |
355 | * write out the superblock safely. | |
356 | * | |
dab291af | 357 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 358 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
359 | * that error until we've noted it down and cleared it. |
360 | */ | |
361 | ||
617ba13b | 362 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 363 | { |
ac27a0ec DK |
364 | if (sb->s_flags & MS_RDONLY) |
365 | return; | |
366 | ||
2b2d6d01 | 367 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 368 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 369 | |
4ab2f15b | 370 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 371 | if (journal) |
dab291af | 372 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 373 | } |
2b2d6d01 | 374 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 375 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
376 | /* |
377 | * Make sure updated value of ->s_mount_flags will be visible | |
378 | * before ->s_flags update | |
379 | */ | |
380 | smp_wmb(); | |
ac27a0ec DK |
381 | sb->s_flags |= MS_RDONLY; |
382 | } | |
ac27a0ec | 383 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 384 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
385 | sb->s_id); |
386 | } | |
387 | ||
efbed4dc TT |
388 | #define ext4_error_ratelimit(sb) \ |
389 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
390 | "EXT4-fs error") | |
391 | ||
12062ddd | 392 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 393 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 394 | { |
0ff2ea7d | 395 | struct va_format vaf; |
ac27a0ec DK |
396 | va_list args; |
397 | ||
efbed4dc TT |
398 | if (ext4_error_ratelimit(sb)) { |
399 | va_start(args, fmt); | |
400 | vaf.fmt = fmt; | |
401 | vaf.va = &args; | |
402 | printk(KERN_CRIT | |
403 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
404 | sb->s_id, function, line, current->comm, &vaf); | |
405 | va_end(args); | |
406 | } | |
f3fc0210 | 407 | save_error_info(sb, function, line); |
617ba13b | 408 | ext4_handle_error(sb); |
ac27a0ec DK |
409 | } |
410 | ||
e7c96e8e JP |
411 | void __ext4_error_inode(struct inode *inode, const char *function, |
412 | unsigned int line, ext4_fsblk_t block, | |
413 | const char *fmt, ...) | |
273df556 FM |
414 | { |
415 | va_list args; | |
f7c21177 | 416 | struct va_format vaf; |
1c13d5c0 | 417 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 418 | |
1c13d5c0 TT |
419 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
420 | es->s_last_error_block = cpu_to_le64(block); | |
efbed4dc TT |
421 | if (ext4_error_ratelimit(inode->i_sb)) { |
422 | va_start(args, fmt); | |
423 | vaf.fmt = fmt; | |
424 | vaf.va = &args; | |
425 | if (block) | |
426 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
427 | "inode #%lu: block %llu: comm %s: %pV\n", | |
428 | inode->i_sb->s_id, function, line, inode->i_ino, | |
429 | block, current->comm, &vaf); | |
430 | else | |
431 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
432 | "inode #%lu: comm %s: %pV\n", | |
433 | inode->i_sb->s_id, function, line, inode->i_ino, | |
434 | current->comm, &vaf); | |
435 | va_end(args); | |
436 | } | |
1c13d5c0 | 437 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
438 | ext4_handle_error(inode->i_sb); |
439 | } | |
440 | ||
e7c96e8e JP |
441 | void __ext4_error_file(struct file *file, const char *function, |
442 | unsigned int line, ext4_fsblk_t block, | |
443 | const char *fmt, ...) | |
273df556 FM |
444 | { |
445 | va_list args; | |
f7c21177 | 446 | struct va_format vaf; |
1c13d5c0 | 447 | struct ext4_super_block *es; |
496ad9aa | 448 | struct inode *inode = file_inode(file); |
273df556 FM |
449 | char pathname[80], *path; |
450 | ||
1c13d5c0 TT |
451 | es = EXT4_SB(inode->i_sb)->s_es; |
452 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
efbed4dc TT |
453 | if (ext4_error_ratelimit(inode->i_sb)) { |
454 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); | |
455 | if (IS_ERR(path)) | |
456 | path = "(unknown)"; | |
457 | va_start(args, fmt); | |
458 | vaf.fmt = fmt; | |
459 | vaf.va = &args; | |
460 | if (block) | |
461 | printk(KERN_CRIT | |
462 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
463 | "block %llu: comm %s: path %s: %pV\n", | |
464 | inode->i_sb->s_id, function, line, inode->i_ino, | |
465 | block, current->comm, path, &vaf); | |
466 | else | |
467 | printk(KERN_CRIT | |
468 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
469 | "comm %s: path %s: %pV\n", | |
470 | inode->i_sb->s_id, function, line, inode->i_ino, | |
471 | current->comm, path, &vaf); | |
472 | va_end(args); | |
473 | } | |
1c13d5c0 | 474 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
475 | ext4_handle_error(inode->i_sb); |
476 | } | |
477 | ||
722887dd TT |
478 | const char *ext4_decode_error(struct super_block *sb, int errno, |
479 | char nbuf[16]) | |
ac27a0ec DK |
480 | { |
481 | char *errstr = NULL; | |
482 | ||
483 | switch (errno) { | |
484 | case -EIO: | |
485 | errstr = "IO failure"; | |
486 | break; | |
487 | case -ENOMEM: | |
488 | errstr = "Out of memory"; | |
489 | break; | |
490 | case -EROFS: | |
78f1ddbb TT |
491 | if (!sb || (EXT4_SB(sb)->s_journal && |
492 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
493 | errstr = "Journal has aborted"; |
494 | else | |
495 | errstr = "Readonly filesystem"; | |
496 | break; | |
497 | default: | |
498 | /* If the caller passed in an extra buffer for unknown | |
499 | * errors, textualise them now. Else we just return | |
500 | * NULL. */ | |
501 | if (nbuf) { | |
502 | /* Check for truncated error codes... */ | |
503 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
504 | errstr = nbuf; | |
505 | } | |
506 | break; | |
507 | } | |
508 | ||
509 | return errstr; | |
510 | } | |
511 | ||
617ba13b | 512 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
513 | * automatically and invokes the appropriate error response. */ |
514 | ||
c398eda0 TT |
515 | void __ext4_std_error(struct super_block *sb, const char *function, |
516 | unsigned int line, int errno) | |
ac27a0ec DK |
517 | { |
518 | char nbuf[16]; | |
519 | const char *errstr; | |
520 | ||
521 | /* Special case: if the error is EROFS, and we're not already | |
522 | * inside a transaction, then there's really no point in logging | |
523 | * an error. */ | |
524 | if (errno == -EROFS && journal_current_handle() == NULL && | |
525 | (sb->s_flags & MS_RDONLY)) | |
526 | return; | |
527 | ||
efbed4dc TT |
528 | if (ext4_error_ratelimit(sb)) { |
529 | errstr = ext4_decode_error(sb, errno, nbuf); | |
530 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
531 | sb->s_id, function, line, errstr); | |
532 | } | |
ac27a0ec | 533 | |
efbed4dc | 534 | save_error_info(sb, function, line); |
617ba13b | 535 | ext4_handle_error(sb); |
ac27a0ec DK |
536 | } |
537 | ||
538 | /* | |
617ba13b | 539 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
540 | * abort function may be used to deal with unrecoverable failures such |
541 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
542 | * | |
543 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
544 | * unless the error response on the fs has been set to panic in which | |
545 | * case we take the easy way out and panic immediately. | |
546 | */ | |
547 | ||
c67d859e | 548 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 549 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
550 | { |
551 | va_list args; | |
552 | ||
1c13d5c0 | 553 | save_error_info(sb, function, line); |
ac27a0ec | 554 | va_start(args, fmt); |
c398eda0 TT |
555 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
556 | function, line); | |
ac27a0ec DK |
557 | vprintk(fmt, args); |
558 | printk("\n"); | |
559 | va_end(args); | |
560 | ||
1c13d5c0 TT |
561 | if ((sb->s_flags & MS_RDONLY) == 0) { |
562 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 563 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
564 | /* |
565 | * Make sure updated value of ->s_mount_flags will be visible | |
566 | * before ->s_flags update | |
567 | */ | |
568 | smp_wmb(); | |
569 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
570 | if (EXT4_SB(sb)->s_journal) |
571 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
572 | save_error_info(sb, function, line); | |
573 | } | |
ac27a0ec | 574 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 575 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
576 | } |
577 | ||
e7c96e8e JP |
578 | void __ext4_msg(struct super_block *sb, |
579 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 580 | { |
0ff2ea7d | 581 | struct va_format vaf; |
b31e1552 ES |
582 | va_list args; |
583 | ||
efbed4dc TT |
584 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
585 | return; | |
586 | ||
b31e1552 | 587 | va_start(args, fmt); |
0ff2ea7d JP |
588 | vaf.fmt = fmt; |
589 | vaf.va = &args; | |
590 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
591 | va_end(args); |
592 | } | |
593 | ||
b03a2f7e AD |
594 | #define ext4_warning_ratelimit(sb) \ |
595 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
596 | "EXT4-fs warning") | |
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 | ||
b03a2f7e | 604 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
605 | return; |
606 | ||
ac27a0ec | 607 | va_start(args, fmt); |
0ff2ea7d JP |
608 | vaf.fmt = fmt; |
609 | vaf.va = &args; | |
610 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
611 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
612 | va_end(args); |
613 | } | |
614 | ||
b03a2f7e AD |
615 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
616 | unsigned int line, const char *fmt, ...) | |
617 | { | |
618 | struct va_format vaf; | |
619 | va_list args; | |
620 | ||
621 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
622 | return; | |
623 | ||
624 | va_start(args, fmt); | |
625 | vaf.fmt = fmt; | |
626 | vaf.va = &args; | |
627 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
628 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
629 | function, line, inode->i_ino, current->comm, &vaf); | |
630 | va_end(args); | |
631 | } | |
632 | ||
e29136f8 TT |
633 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
634 | struct super_block *sb, ext4_group_t grp, | |
635 | unsigned long ino, ext4_fsblk_t block, | |
636 | const char *fmt, ...) | |
5d1b1b3f AK |
637 | __releases(bitlock) |
638 | __acquires(bitlock) | |
639 | { | |
0ff2ea7d | 640 | struct va_format vaf; |
5d1b1b3f AK |
641 | va_list args; |
642 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
643 | ||
1c13d5c0 TT |
644 | es->s_last_error_ino = cpu_to_le32(ino); |
645 | es->s_last_error_block = cpu_to_le64(block); | |
646 | __save_error_info(sb, function, line); | |
0ff2ea7d | 647 | |
efbed4dc TT |
648 | if (ext4_error_ratelimit(sb)) { |
649 | va_start(args, fmt); | |
650 | vaf.fmt = fmt; | |
651 | vaf.va = &args; | |
652 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
653 | sb->s_id, function, line, grp); | |
654 | if (ino) | |
655 | printk(KERN_CONT "inode %lu: ", ino); | |
656 | if (block) | |
657 | printk(KERN_CONT "block %llu:", | |
658 | (unsigned long long) block); | |
659 | printk(KERN_CONT "%pV\n", &vaf); | |
660 | va_end(args); | |
661 | } | |
5d1b1b3f AK |
662 | |
663 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 664 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
665 | return; |
666 | } | |
1c13d5c0 | 667 | |
5d1b1b3f AK |
668 | ext4_unlock_group(sb, grp); |
669 | ext4_handle_error(sb); | |
670 | /* | |
671 | * We only get here in the ERRORS_RO case; relocking the group | |
672 | * may be dangerous, but nothing bad will happen since the | |
673 | * filesystem will have already been marked read/only and the | |
674 | * journal has been aborted. We return 1 as a hint to callers | |
675 | * who might what to use the return value from | |
25985edc | 676 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
677 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
678 | * aggressively from the ext4 function in question, with a | |
679 | * more appropriate error code. | |
680 | */ | |
681 | ext4_lock_group(sb, grp); | |
682 | return; | |
683 | } | |
684 | ||
617ba13b | 685 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 686 | { |
617ba13b | 687 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 688 | |
617ba13b | 689 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
690 | return; |
691 | ||
12062ddd | 692 | ext4_warning(sb, |
ac27a0ec DK |
693 | "updating to rev %d because of new feature flag, " |
694 | "running e2fsck is recommended", | |
617ba13b | 695 | EXT4_DYNAMIC_REV); |
ac27a0ec | 696 | |
617ba13b MC |
697 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
698 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
699 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
700 | /* leave es->s_feature_*compat flags alone */ |
701 | /* es->s_uuid will be set by e2fsck if empty */ | |
702 | ||
703 | /* | |
704 | * The rest of the superblock fields should be zero, and if not it | |
705 | * means they are likely already in use, so leave them alone. We | |
706 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
707 | */ | |
708 | } | |
709 | ||
710 | /* | |
711 | * Open the external journal device | |
712 | */ | |
b31e1552 | 713 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
714 | { |
715 | struct block_device *bdev; | |
716 | char b[BDEVNAME_SIZE]; | |
717 | ||
d4d77629 | 718 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
719 | if (IS_ERR(bdev)) |
720 | goto fail; | |
721 | return bdev; | |
722 | ||
723 | fail: | |
b31e1552 | 724 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
725 | __bdevname(dev, b), PTR_ERR(bdev)); |
726 | return NULL; | |
727 | } | |
728 | ||
729 | /* | |
730 | * Release the journal device | |
731 | */ | |
4385bab1 | 732 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 733 | { |
4385bab1 | 734 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
735 | } |
736 | ||
4385bab1 | 737 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
738 | { |
739 | struct block_device *bdev; | |
ac27a0ec DK |
740 | bdev = sbi->journal_bdev; |
741 | if (bdev) { | |
4385bab1 | 742 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
743 | sbi->journal_bdev = NULL; |
744 | } | |
ac27a0ec DK |
745 | } |
746 | ||
747 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
748 | { | |
617ba13b | 749 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
750 | } |
751 | ||
617ba13b | 752 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
753 | { |
754 | struct list_head *l; | |
755 | ||
b31e1552 ES |
756 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
757 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
758 | |
759 | printk(KERN_ERR "sb_info orphan list:\n"); | |
760 | list_for_each(l, &sbi->s_orphan) { | |
761 | struct inode *inode = orphan_list_entry(l); | |
762 | printk(KERN_ERR " " | |
763 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
764 | inode->i_sb->s_id, inode->i_ino, inode, | |
765 | inode->i_mode, inode->i_nlink, | |
766 | NEXT_ORPHAN(inode)); | |
767 | } | |
768 | } | |
769 | ||
2b2d6d01 | 770 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 771 | { |
617ba13b MC |
772 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
773 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 774 | int i, err; |
ac27a0ec | 775 | |
857ac889 | 776 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
777 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
778 | ||
2e8fa54e | 779 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 780 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 781 | |
0390131b FM |
782 | if (sbi->s_journal) { |
783 | err = jbd2_journal_destroy(sbi->s_journal); | |
784 | sbi->s_journal = NULL; | |
785 | if (err < 0) | |
c67d859e | 786 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 787 | } |
d4edac31 | 788 | |
d3922a77 | 789 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 790 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
791 | ext4_release_system_zone(sb); |
792 | ext4_mb_release(sb); | |
793 | ext4_ext_release(sb); | |
794 | ext4_xattr_put_super(sb); | |
795 | ||
ac27a0ec | 796 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 797 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 798 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 799 | } |
58c5873a | 800 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
801 | ext4_commit_super(sb, 1); |
802 | ||
240799cd | 803 | if (sbi->s_proc) { |
66acdcf4 | 804 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 805 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 806 | } |
3197ebdb | 807 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
808 | |
809 | for (i = 0; i < sbi->s_gdb_count; i++) | |
810 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
811 | kvfree(sbi->s_group_desc); |
812 | kvfree(sbi->s_flex_groups); | |
57042651 | 813 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
814 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
815 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 816 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
ac27a0ec DK |
817 | brelse(sbi->s_sbh); |
818 | #ifdef CONFIG_QUOTA | |
a2d4a646 | 819 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
820 | kfree(sbi->s_qf_names[i]); |
821 | #endif | |
822 | ||
823 | /* Debugging code just in case the in-memory inode orphan list | |
824 | * isn't empty. The on-disk one can be non-empty if we've | |
825 | * detected an error and taken the fs readonly, but the | |
826 | * in-memory list had better be clean by this point. */ | |
827 | if (!list_empty(&sbi->s_orphan)) | |
828 | dump_orphan_list(sb, sbi); | |
829 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
830 | ||
89d96a6f | 831 | sync_blockdev(sb->s_bdev); |
f98393a6 | 832 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
833 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
834 | /* | |
835 | * Invalidate the journal device's buffers. We don't want them | |
836 | * floating about in memory - the physical journal device may | |
837 | * hotswapped, and it breaks the `ro-after' testing code. | |
838 | */ | |
839 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 840 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 841 | ext4_blkdev_remove(sbi); |
ac27a0ec | 842 | } |
9c191f70 M |
843 | if (sbi->s_mb_cache) { |
844 | ext4_xattr_destroy_cache(sbi->s_mb_cache); | |
845 | sbi->s_mb_cache = NULL; | |
846 | } | |
c5e06d10 JL |
847 | if (sbi->s_mmp_tsk) |
848 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 849 | sb->s_fs_info = NULL; |
3197ebdb TT |
850 | /* |
851 | * Now that we are completely done shutting down the | |
852 | * superblock, we need to actually destroy the kobject. | |
853 | */ | |
3197ebdb TT |
854 | kobject_put(&sbi->s_kobj); |
855 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
856 | if (sbi->s_chksum_driver) |
857 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 858 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 859 | kfree(sbi); |
ac27a0ec DK |
860 | } |
861 | ||
e18b890b | 862 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
863 | |
864 | /* | |
865 | * Called inside transaction, so use GFP_NOFS | |
866 | */ | |
617ba13b | 867 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 868 | { |
617ba13b | 869 | struct ext4_inode_info *ei; |
ac27a0ec | 870 | |
e6b4f8da | 871 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
872 | if (!ei) |
873 | return NULL; | |
0b8e58a1 | 874 | |
ac27a0ec | 875 | ei->vfs_inode.i_version = 1; |
202ee5df | 876 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
877 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
878 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
879 | ext4_es_init_tree(&ei->i_es_tree); |
880 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 881 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 882 | ei->i_es_all_nr = 0; |
edaa53ca | 883 | ei->i_es_shk_nr = 0; |
dd475925 | 884 | ei->i_es_shrink_lblk = 0; |
d2a17637 MC |
885 | ei->i_reserved_data_blocks = 0; |
886 | ei->i_reserved_meta_blocks = 0; | |
887 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 888 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 889 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 890 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
891 | #ifdef CONFIG_QUOTA |
892 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 893 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 894 | #endif |
8aefcd55 | 895 | ei->jinode = NULL; |
2e8fa54e | 896 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 897 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
898 | ei->i_sync_tid = 0; |
899 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 900 | atomic_set(&ei->i_ioend_count, 0); |
e27f41e1 | 901 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 902 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
b30ab0e0 | 903 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
b7236e21 | 904 | ei->i_crypt_info = NULL; |
b30ab0e0 | 905 | #endif |
ac27a0ec DK |
906 | return &ei->vfs_inode; |
907 | } | |
908 | ||
7ff9c073 TT |
909 | static int ext4_drop_inode(struct inode *inode) |
910 | { | |
911 | int drop = generic_drop_inode(inode); | |
912 | ||
913 | trace_ext4_drop_inode(inode, drop); | |
914 | return drop; | |
915 | } | |
916 | ||
fa0d7e3d NP |
917 | static void ext4_i_callback(struct rcu_head *head) |
918 | { | |
919 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
920 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
921 | } | |
922 | ||
617ba13b | 923 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 924 | { |
9f7dd93d | 925 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
926 | ext4_msg(inode->i_sb, KERN_ERR, |
927 | "Inode %lu (%p): orphan list check failed!", | |
928 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
929 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
930 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
931 | true); | |
932 | dump_stack(); | |
933 | } | |
fa0d7e3d | 934 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
935 | } |
936 | ||
51cc5068 | 937 | static void init_once(void *foo) |
ac27a0ec | 938 | { |
617ba13b | 939 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 940 | |
a35afb83 | 941 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 942 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 943 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 944 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
945 | } |
946 | ||
e67bc2b3 | 947 | static int __init init_inodecache(void) |
ac27a0ec | 948 | { |
617ba13b MC |
949 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
950 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
951 | 0, (SLAB_RECLAIM_ACCOUNT| |
952 | SLAB_MEM_SPREAD), | |
20c2df83 | 953 | init_once); |
617ba13b | 954 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
955 | return -ENOMEM; |
956 | return 0; | |
957 | } | |
958 | ||
959 | static void destroy_inodecache(void) | |
960 | { | |
8c0a8537 KS |
961 | /* |
962 | * Make sure all delayed rcu free inodes are flushed before we | |
963 | * destroy cache. | |
964 | */ | |
965 | rcu_barrier(); | |
617ba13b | 966 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
967 | } |
968 | ||
0930fcc1 | 969 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 970 | { |
0930fcc1 | 971 | invalidate_inode_buffers(inode); |
dbd5768f | 972 | clear_inode(inode); |
9f754758 | 973 | dquot_drop(inode); |
c2ea3fde | 974 | ext4_discard_preallocations(inode); |
51865fda | 975 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
976 | if (EXT4_I(inode)->jinode) { |
977 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
978 | EXT4_I(inode)->jinode); | |
979 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
980 | EXT4_I(inode)->jinode = NULL; | |
981 | } | |
b7236e21 TT |
982 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
983 | if (EXT4_I(inode)->i_crypt_info) | |
c936e1ec | 984 | ext4_free_encryption_info(inode, EXT4_I(inode)->i_crypt_info); |
b7236e21 | 985 | #endif |
ac27a0ec DK |
986 | } |
987 | ||
1b961ac0 | 988 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 989 | u64 ino, u32 generation) |
ac27a0ec | 990 | { |
ac27a0ec | 991 | struct inode *inode; |
ac27a0ec | 992 | |
617ba13b | 993 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 994 | return ERR_PTR(-ESTALE); |
617ba13b | 995 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
996 | return ERR_PTR(-ESTALE); |
997 | ||
998 | /* iget isn't really right if the inode is currently unallocated!! | |
999 | * | |
617ba13b | 1000 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1001 | * deleted, so we should be safe. |
1002 | * | |
1003 | * Currently we don't know the generation for parent directory, so | |
1004 | * a generation of 0 means "accept any" | |
1005 | */ | |
f4bb2981 | 1006 | inode = ext4_iget_normal(sb, ino); |
1d1fe1ee DH |
1007 | if (IS_ERR(inode)) |
1008 | return ERR_CAST(inode); | |
1009 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1010 | iput(inode); |
1011 | return ERR_PTR(-ESTALE); | |
1012 | } | |
1b961ac0 CH |
1013 | |
1014 | return inode; | |
1015 | } | |
1016 | ||
1017 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1018 | int fh_len, int fh_type) |
1b961ac0 CH |
1019 | { |
1020 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1021 | ext4_nfs_get_inode); | |
1022 | } | |
1023 | ||
1024 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1025 | int fh_len, int fh_type) |
1b961ac0 CH |
1026 | { |
1027 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1028 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1029 | } |
1030 | ||
c39a7f84 TO |
1031 | /* |
1032 | * Try to release metadata pages (indirect blocks, directories) which are | |
1033 | * mapped via the block device. Since these pages could have journal heads | |
1034 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1035 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1036 | */ | |
0b8e58a1 AD |
1037 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1038 | gfp_t wait) | |
c39a7f84 TO |
1039 | { |
1040 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1041 | ||
1042 | WARN_ON(PageChecked(page)); | |
1043 | if (!page_has_buffers(page)) | |
1044 | return 0; | |
1045 | if (journal) | |
1046 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1047 | wait & ~__GFP_WAIT); | |
1048 | return try_to_free_buffers(page); | |
1049 | } | |
1050 | ||
ac27a0ec | 1051 | #ifdef CONFIG_QUOTA |
af5bc92d | 1052 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1053 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1054 | |
617ba13b MC |
1055 | static int ext4_write_dquot(struct dquot *dquot); |
1056 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1057 | static int ext4_release_dquot(struct dquot *dquot); | |
1058 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1059 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1060 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1061 | struct path *path); |
ca0e05e4 | 1062 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1063 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1064 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1065 | size_t len, loff_t off); |
617ba13b | 1066 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1067 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1068 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1069 | unsigned int flags); | |
1070 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1071 | |
96c7e0d9 JK |
1072 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1073 | { | |
1074 | return EXT4_I(inode)->i_dquot; | |
1075 | } | |
1076 | ||
61e225dc | 1077 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1078 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1079 | .write_dquot = ext4_write_dquot, |
1080 | .acquire_dquot = ext4_acquire_dquot, | |
1081 | .release_dquot = ext4_release_dquot, | |
1082 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1083 | .write_info = ext4_write_info, |
1084 | .alloc_dquot = dquot_alloc, | |
1085 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1086 | }; |
1087 | ||
0d54b217 | 1088 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1089 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1090 | .quota_off = ext4_quota_off, |
287a8095 | 1091 | .quota_sync = dquot_quota_sync, |
0a240339 | 1092 | .get_state = dquot_get_state, |
287a8095 CH |
1093 | .set_info = dquot_set_dqinfo, |
1094 | .get_dqblk = dquot_get_dqblk, | |
1095 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1096 | }; |
1097 | #endif | |
1098 | ||
ee9b6d61 | 1099 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1100 | .alloc_inode = ext4_alloc_inode, |
1101 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1102 | .write_inode = ext4_write_inode, |
1103 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1104 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1105 | .evict_inode = ext4_evict_inode, |
617ba13b | 1106 | .put_super = ext4_put_super, |
617ba13b | 1107 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1108 | .freeze_fs = ext4_freeze, |
1109 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1110 | .statfs = ext4_statfs, |
1111 | .remount_fs = ext4_remount, | |
617ba13b | 1112 | .show_options = ext4_show_options, |
ac27a0ec | 1113 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1114 | .quota_read = ext4_quota_read, |
1115 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1116 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1117 | #endif |
c39a7f84 | 1118 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1119 | }; |
1120 | ||
39655164 | 1121 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1122 | .fh_to_dentry = ext4_fh_to_dentry, |
1123 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1124 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1125 | }; |
1126 | ||
1127 | enum { | |
1128 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1129 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1130 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1131 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1132 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1133 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1134 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1135 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1136 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1137 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1138 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1139 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
923ae0ff | 1140 | Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, |
1449032b | 1141 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
a26f4992 | 1142 | Opt_lazytime, Opt_nolazytime, |
1449032b | 1143 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1144 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1145 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1146 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
c6d3d56d | 1147 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
ac27a0ec DK |
1148 | }; |
1149 | ||
a447c093 | 1150 | static const match_table_t tokens = { |
ac27a0ec DK |
1151 | {Opt_bsd_df, "bsddf"}, |
1152 | {Opt_minix_df, "minixdf"}, | |
1153 | {Opt_grpid, "grpid"}, | |
1154 | {Opt_grpid, "bsdgroups"}, | |
1155 | {Opt_nogrpid, "nogrpid"}, | |
1156 | {Opt_nogrpid, "sysvgroups"}, | |
1157 | {Opt_resgid, "resgid=%u"}, | |
1158 | {Opt_resuid, "resuid=%u"}, | |
1159 | {Opt_sb, "sb=%u"}, | |
1160 | {Opt_err_cont, "errors=continue"}, | |
1161 | {Opt_err_panic, "errors=panic"}, | |
1162 | {Opt_err_ro, "errors=remount-ro"}, | |
1163 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1164 | {Opt_debug, "debug"}, |
72578c33 TT |
1165 | {Opt_removed, "oldalloc"}, |
1166 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1167 | {Opt_user_xattr, "user_xattr"}, |
1168 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1169 | {Opt_acl, "acl"}, | |
1170 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1171 | {Opt_noload, "norecovery"}, |
5a916be1 | 1172 | {Opt_noload, "noload"}, |
72578c33 TT |
1173 | {Opt_removed, "nobh"}, |
1174 | {Opt_removed, "bh"}, | |
ac27a0ec | 1175 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1176 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1177 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1178 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1179 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1180 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1181 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1182 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1183 | {Opt_abort, "abort"}, |
1184 | {Opt_data_journal, "data=journal"}, | |
1185 | {Opt_data_ordered, "data=ordered"}, | |
1186 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1187 | {Opt_data_err_abort, "data_err=abort"}, |
1188 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1189 | {Opt_offusrjquota, "usrjquota="}, |
1190 | {Opt_usrjquota, "usrjquota=%s"}, | |
1191 | {Opt_offgrpjquota, "grpjquota="}, | |
1192 | {Opt_grpjquota, "grpjquota=%s"}, | |
1193 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1194 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1195 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1196 | {Opt_grpquota, "grpquota"}, |
1197 | {Opt_noquota, "noquota"}, | |
1198 | {Opt_quota, "quota"}, | |
1199 | {Opt_usrquota, "usrquota"}, | |
1200 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1201 | {Opt_barrier, "barrier"}, |
1202 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1203 | {Opt_i_version, "i_version"}, |
923ae0ff | 1204 | {Opt_dax, "dax"}, |
c9de560d | 1205 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1206 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1207 | {Opt_lazytime, "lazytime"}, |
1208 | {Opt_nolazytime, "nolazytime"}, | |
dd919b98 | 1209 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1210 | {Opt_removed, "mblk_io_submit"}, |
1211 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1212 | {Opt_block_validity, "block_validity"}, |
1213 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1214 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1215 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1216 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1217 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1218 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1219 | {Opt_dioread_nolock, "dioread_nolock"}, |
1220 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1221 | {Opt_discard, "discard"}, |
1222 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1223 | {Opt_init_itable, "init_itable=%u"}, |
1224 | {Opt_init_itable, "init_itable"}, | |
1225 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1226 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1227 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
c7198b9c TT |
1228 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1229 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1230 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1231 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1232 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1233 | {Opt_err, NULL}, |
ac27a0ec DK |
1234 | }; |
1235 | ||
617ba13b | 1236 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1237 | { |
617ba13b | 1238 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1239 | char *options = (char *) *data; |
1240 | ||
1241 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1242 | return 1; /* Default location */ | |
0b8e58a1 | 1243 | |
ac27a0ec | 1244 | options += 3; |
0b8e58a1 | 1245 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1246 | sb_block = simple_strtoul(options, &options, 0); |
1247 | if (*options && *options != ',') { | |
4776004f | 1248 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1249 | (char *) *data); |
1250 | return 1; | |
1251 | } | |
1252 | if (*options == ',') | |
1253 | options++; | |
1254 | *data = (void *) options; | |
0b8e58a1 | 1255 | |
ac27a0ec DK |
1256 | return sb_block; |
1257 | } | |
1258 | ||
b3881f74 | 1259 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1260 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1261 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1262 | |
56c50f11 DM |
1263 | #ifdef CONFIG_QUOTA |
1264 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1265 | { | |
1266 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1267 | char *qname; | |
03dafb5f | 1268 | int ret = -1; |
56c50f11 DM |
1269 | |
1270 | if (sb_any_quota_loaded(sb) && | |
1271 | !sbi->s_qf_names[qtype]) { | |
1272 | ext4_msg(sb, KERN_ERR, | |
1273 | "Cannot change journaled " | |
1274 | "quota options when quota turned on"); | |
57f73c2c | 1275 | return -1; |
56c50f11 | 1276 | } |
262b4662 JK |
1277 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
1278 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " | |
1279 | "when QUOTA feature is enabled"); | |
1280 | return -1; | |
1281 | } | |
56c50f11 DM |
1282 | qname = match_strdup(args); |
1283 | if (!qname) { | |
1284 | ext4_msg(sb, KERN_ERR, | |
1285 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1286 | return -1; |
56c50f11 | 1287 | } |
03dafb5f CG |
1288 | if (sbi->s_qf_names[qtype]) { |
1289 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1290 | ret = 1; | |
1291 | else | |
1292 | ext4_msg(sb, KERN_ERR, | |
1293 | "%s quota file already specified", | |
1294 | QTYPE2NAME(qtype)); | |
1295 | goto errout; | |
56c50f11 | 1296 | } |
03dafb5f | 1297 | if (strchr(qname, '/')) { |
56c50f11 DM |
1298 | ext4_msg(sb, KERN_ERR, |
1299 | "quotafile must be on filesystem root"); | |
03dafb5f | 1300 | goto errout; |
56c50f11 | 1301 | } |
03dafb5f | 1302 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1303 | set_opt(sb, QUOTA); |
56c50f11 | 1304 | return 1; |
03dafb5f CG |
1305 | errout: |
1306 | kfree(qname); | |
1307 | return ret; | |
56c50f11 DM |
1308 | } |
1309 | ||
1310 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1311 | { | |
1312 | ||
1313 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1314 | ||
1315 | if (sb_any_quota_loaded(sb) && | |
1316 | sbi->s_qf_names[qtype]) { | |
1317 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1318 | " when quota turned on"); | |
57f73c2c | 1319 | return -1; |
56c50f11 | 1320 | } |
03dafb5f | 1321 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1322 | sbi->s_qf_names[qtype] = NULL; |
1323 | return 1; | |
1324 | } | |
1325 | #endif | |
1326 | ||
26092bf5 TT |
1327 | #define MOPT_SET 0x0001 |
1328 | #define MOPT_CLEAR 0x0002 | |
1329 | #define MOPT_NOSUPPORT 0x0004 | |
1330 | #define MOPT_EXPLICIT 0x0008 | |
1331 | #define MOPT_CLEAR_ERR 0x0010 | |
1332 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1333 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1334 | #define MOPT_Q 0 |
1335 | #define MOPT_QFMT 0x0040 | |
1336 | #else | |
1337 | #define MOPT_Q MOPT_NOSUPPORT | |
1338 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1339 | #endif |
26092bf5 | 1340 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1341 | #define MOPT_NO_EXT2 0x0100 |
1342 | #define MOPT_NO_EXT3 0x0200 | |
1343 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1344 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1345 | |
1346 | static const struct mount_opts { | |
1347 | int token; | |
1348 | int mount_opt; | |
1349 | int flags; | |
1350 | } ext4_mount_opts[] = { | |
1351 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1352 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1353 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1354 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1355 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1356 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1357 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1358 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1359 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1360 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1361 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1362 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1363 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1364 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1365 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1366 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1367 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1368 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c TT |
1369 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1370 | MOPT_EXT4_ONLY | MOPT_SET}, | |
26092bf5 | 1371 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c TT |
1372 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1373 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1374 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, | |
26092bf5 TT |
1375 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1376 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1377 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c TT |
1378 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
1379 | MOPT_NO_EXT2 | MOPT_SET}, | |
1380 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, | |
1381 | MOPT_NO_EXT2 | MOPT_CLEAR}, | |
26092bf5 TT |
1382 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1383 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1384 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1385 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1386 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1387 | {Opt_commit, 0, MOPT_GTE0}, | |
1388 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1389 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1390 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1391 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1392 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1393 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1394 | {Opt_resuid, 0, MOPT_GTE0}, |
1395 | {Opt_resgid, 0, MOPT_GTE0}, | |
1396 | {Opt_journal_dev, 0, MOPT_GTE0}, | |
ad4eec61 | 1397 | {Opt_journal_path, 0, MOPT_STRING}, |
0efb3b23 | 1398 | {Opt_journal_ioprio, 0, MOPT_GTE0}, |
8dc0aa8c TT |
1399 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1400 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1401 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1402 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1403 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1404 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1405 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1406 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1407 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1408 | #else |
26092bf5 TT |
1409 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1410 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1411 | #endif |
26092bf5 TT |
1412 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1413 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1414 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1415 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1416 | MOPT_SET | MOPT_Q}, | |
1417 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1418 | MOPT_SET | MOPT_Q}, | |
1419 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1420 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1421 | {Opt_usrjquota, 0, MOPT_Q}, | |
1422 | {Opt_grpjquota, 0, MOPT_Q}, | |
1423 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1424 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1425 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1426 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1427 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1428 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1429 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
26092bf5 TT |
1430 | {Opt_err, 0, 0} |
1431 | }; | |
1432 | ||
1433 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1434 | substring_t *args, unsigned long *journal_devnum, | |
1435 | unsigned int *journal_ioprio, int is_remount) | |
1436 | { | |
1437 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1438 | const struct mount_opts *m; | |
08cefc7a EB |
1439 | kuid_t uid; |
1440 | kgid_t gid; | |
26092bf5 TT |
1441 | int arg = 0; |
1442 | ||
57f73c2c TT |
1443 | #ifdef CONFIG_QUOTA |
1444 | if (token == Opt_usrjquota) | |
1445 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1446 | else if (token == Opt_grpjquota) | |
1447 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1448 | else if (token == Opt_offusrjquota) | |
1449 | return clear_qf_name(sb, USRQUOTA); | |
1450 | else if (token == Opt_offgrpjquota) | |
1451 | return clear_qf_name(sb, GRPQUOTA); | |
1452 | #endif | |
26092bf5 | 1453 | switch (token) { |
f7048605 TT |
1454 | case Opt_noacl: |
1455 | case Opt_nouser_xattr: | |
1456 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1457 | break; | |
26092bf5 TT |
1458 | case Opt_sb: |
1459 | return 1; /* handled by get_sb_block() */ | |
1460 | case Opt_removed: | |
5f3633e3 | 1461 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1462 | return 1; |
26092bf5 TT |
1463 | case Opt_abort: |
1464 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1465 | return 1; | |
1466 | case Opt_i_version: | |
1467 | sb->s_flags |= MS_I_VERSION; | |
1468 | return 1; | |
a26f4992 TT |
1469 | case Opt_lazytime: |
1470 | sb->s_flags |= MS_LAZYTIME; | |
1471 | return 1; | |
1472 | case Opt_nolazytime: | |
1473 | sb->s_flags &= ~MS_LAZYTIME; | |
1474 | return 1; | |
26092bf5 TT |
1475 | } |
1476 | ||
5f3633e3 JK |
1477 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1478 | if (token == m->token) | |
1479 | break; | |
1480 | ||
1481 | if (m->token == Opt_err) { | |
1482 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1483 | "or missing value", opt); | |
1484 | return -1; | |
1485 | } | |
1486 | ||
8dc0aa8c TT |
1487 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1488 | ext4_msg(sb, KERN_ERR, | |
1489 | "Mount option \"%s\" incompatible with ext2", opt); | |
1490 | return -1; | |
1491 | } | |
1492 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1493 | ext4_msg(sb, KERN_ERR, | |
1494 | "Mount option \"%s\" incompatible with ext3", opt); | |
1495 | return -1; | |
1496 | } | |
1497 | ||
ad4eec61 | 1498 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1499 | return -1; |
1500 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1501 | return -1; | |
1502 | if (m->flags & MOPT_EXPLICIT) | |
1503 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1504 | if (m->flags & MOPT_CLEAR_ERR) | |
1505 | clear_opt(sb, ERRORS_MASK); | |
1506 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1507 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1508 | "options when quota turned on"); | |
1509 | return -1; | |
1510 | } | |
1511 | ||
1512 | if (m->flags & MOPT_NOSUPPORT) { | |
1513 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1514 | } else if (token == Opt_commit) { | |
1515 | if (arg == 0) | |
1516 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1517 | sbi->s_commit_interval = HZ * arg; | |
1518 | } else if (token == Opt_max_batch_time) { | |
5f3633e3 JK |
1519 | sbi->s_max_batch_time = arg; |
1520 | } else if (token == Opt_min_batch_time) { | |
1521 | sbi->s_min_batch_time = arg; | |
1522 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1523 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1524 | ext4_msg(sb, KERN_ERR, | |
1525 | "EXT4-fs: inode_readahead_blks must be " | |
1526 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1527 | return -1; |
5f3633e3 JK |
1528 | } |
1529 | sbi->s_inode_readahead_blks = arg; | |
1530 | } else if (token == Opt_init_itable) { | |
1531 | set_opt(sb, INIT_INODE_TABLE); | |
1532 | if (!args->from) | |
1533 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1534 | sbi->s_li_wait_mult = arg; | |
1535 | } else if (token == Opt_max_dir_size_kb) { | |
1536 | sbi->s_max_dir_size_kb = arg; | |
1537 | } else if (token == Opt_stripe) { | |
1538 | sbi->s_stripe = arg; | |
1539 | } else if (token == Opt_resuid) { | |
1540 | uid = make_kuid(current_user_ns(), arg); | |
1541 | if (!uid_valid(uid)) { | |
1542 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1543 | return -1; |
1544 | } | |
5f3633e3 JK |
1545 | sbi->s_resuid = uid; |
1546 | } else if (token == Opt_resgid) { | |
1547 | gid = make_kgid(current_user_ns(), arg); | |
1548 | if (!gid_valid(gid)) { | |
1549 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1550 | return -1; | |
1551 | } | |
1552 | sbi->s_resgid = gid; | |
1553 | } else if (token == Opt_journal_dev) { | |
1554 | if (is_remount) { | |
1555 | ext4_msg(sb, KERN_ERR, | |
1556 | "Cannot specify journal on remount"); | |
1557 | return -1; | |
1558 | } | |
1559 | *journal_devnum = arg; | |
ad4eec61 ES |
1560 | } else if (token == Opt_journal_path) { |
1561 | char *journal_path; | |
1562 | struct inode *journal_inode; | |
1563 | struct path path; | |
1564 | int error; | |
1565 | ||
1566 | if (is_remount) { | |
1567 | ext4_msg(sb, KERN_ERR, | |
1568 | "Cannot specify journal on remount"); | |
1569 | return -1; | |
1570 | } | |
1571 | journal_path = match_strdup(&args[0]); | |
1572 | if (!journal_path) { | |
1573 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1574 | "journal device string"); | |
1575 | return -1; | |
1576 | } | |
1577 | ||
1578 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1579 | if (error) { | |
1580 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1581 | "journal device path: error %d", error); | |
1582 | kfree(journal_path); | |
1583 | return -1; | |
1584 | } | |
1585 | ||
2b0143b5 | 1586 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1587 | if (!S_ISBLK(journal_inode->i_mode)) { |
1588 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1589 | "is not a block device", journal_path); | |
1590 | path_put(&path); | |
1591 | kfree(journal_path); | |
1592 | return -1; | |
1593 | } | |
1594 | ||
1595 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1596 | path_put(&path); | |
1597 | kfree(journal_path); | |
5f3633e3 JK |
1598 | } else if (token == Opt_journal_ioprio) { |
1599 | if (arg > 7) { | |
1600 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1601 | " (must be 0-7)"); | |
1602 | return -1; | |
1603 | } | |
1604 | *journal_ioprio = | |
1605 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1606 | } else if (token == Opt_test_dummy_encryption) { |
1607 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1608 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1609 | ext4_msg(sb, KERN_WARNING, | |
1610 | "Test dummy encryption mode enabled"); | |
1611 | #else | |
1612 | ext4_msg(sb, KERN_WARNING, | |
1613 | "Test dummy encryption mount option ignored"); | |
1614 | #endif | |
5f3633e3 JK |
1615 | } else if (m->flags & MOPT_DATAJ) { |
1616 | if (is_remount) { | |
1617 | if (!sbi->s_journal) | |
1618 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1619 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1620 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1621 | "Cannot change data mode on remount"); |
26092bf5 | 1622 | return -1; |
ac27a0ec | 1623 | } |
26092bf5 | 1624 | } else { |
5f3633e3 JK |
1625 | clear_opt(sb, DATA_FLAGS); |
1626 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1627 | } |
5f3633e3 JK |
1628 | #ifdef CONFIG_QUOTA |
1629 | } else if (m->flags & MOPT_QFMT) { | |
1630 | if (sb_any_quota_loaded(sb) && | |
1631 | sbi->s_jquota_fmt != m->mount_opt) { | |
1632 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1633 | "quota options when quota turned on"); | |
1634 | return -1; | |
1635 | } | |
262b4662 JK |
1636 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
1637 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
1638 | ext4_msg(sb, KERN_ERR, | |
1639 | "Cannot set journaled quota options " | |
1640 | "when QUOTA feature is enabled"); | |
1641 | return -1; | |
1642 | } | |
5f3633e3 | 1643 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff RZ |
1644 | #endif |
1645 | #ifndef CONFIG_FS_DAX | |
1646 | } else if (token == Opt_dax) { | |
1647 | ext4_msg(sb, KERN_INFO, "dax option not supported"); | |
1648 | return -1; | |
5f3633e3 JK |
1649 | #endif |
1650 | } else { | |
1651 | if (!args->from) | |
1652 | arg = 1; | |
1653 | if (m->flags & MOPT_CLEAR) | |
1654 | arg = !arg; | |
1655 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1656 | ext4_msg(sb, KERN_WARNING, | |
1657 | "buggy handling of option %s", opt); | |
1658 | WARN_ON(1); | |
1659 | return -1; | |
1660 | } | |
1661 | if (arg != 0) | |
1662 | sbi->s_mount_opt |= m->mount_opt; | |
1663 | else | |
1664 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1665 | } |
5f3633e3 | 1666 | return 1; |
26092bf5 TT |
1667 | } |
1668 | ||
1669 | static int parse_options(char *options, struct super_block *sb, | |
1670 | unsigned long *journal_devnum, | |
1671 | unsigned int *journal_ioprio, | |
1672 | int is_remount) | |
1673 | { | |
1674 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1675 | char *p; | |
1676 | substring_t args[MAX_OPT_ARGS]; | |
1677 | int token; | |
1678 | ||
1679 | if (!options) | |
1680 | return 1; | |
1681 | ||
1682 | while ((p = strsep(&options, ",")) != NULL) { | |
1683 | if (!*p) | |
1684 | continue; | |
1685 | /* | |
1686 | * Initialize args struct so we know whether arg was | |
1687 | * found; some options take optional arguments. | |
1688 | */ | |
caecd0af | 1689 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1690 | token = match_token(p, tokens, args); |
1691 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1692 | journal_ioprio, is_remount) < 0) | |
1693 | return 0; | |
ac27a0ec DK |
1694 | } |
1695 | #ifdef CONFIG_QUOTA | |
262b4662 JK |
1696 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
1697 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { | |
1698 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " | |
1699 | "feature is enabled"); | |
1700 | return 0; | |
1701 | } | |
ac27a0ec | 1702 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
482a7425 | 1703 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1704 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1705 | |
482a7425 | 1706 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1707 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1708 | |
56c50f11 | 1709 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1710 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1711 | "format mixing"); | |
ac27a0ec DK |
1712 | return 0; |
1713 | } | |
1714 | ||
1715 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1716 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1717 | "not specified"); | |
ac27a0ec DK |
1718 | return 0; |
1719 | } | |
ac27a0ec DK |
1720 | } |
1721 | #endif | |
261cb20c JK |
1722 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1723 | int blocksize = | |
1724 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1725 | ||
1726 | if (blocksize < PAGE_CACHE_SIZE) { | |
1727 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
1728 | "dioread_nolock if block size != PAGE_SIZE"); | |
1729 | return 0; | |
1730 | } | |
1731 | } | |
d4f76107 JK |
1732 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
1733 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
1734 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " | |
1735 | "in data=ordered mode"); | |
1736 | return 0; | |
1737 | } | |
ac27a0ec DK |
1738 | return 1; |
1739 | } | |
1740 | ||
2adf6da8 TT |
1741 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1742 | struct super_block *sb) | |
1743 | { | |
1744 | #if defined(CONFIG_QUOTA) | |
1745 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1746 | ||
1747 | if (sbi->s_jquota_fmt) { | |
1748 | char *fmtname = ""; | |
1749 | ||
1750 | switch (sbi->s_jquota_fmt) { | |
1751 | case QFMT_VFS_OLD: | |
1752 | fmtname = "vfsold"; | |
1753 | break; | |
1754 | case QFMT_VFS_V0: | |
1755 | fmtname = "vfsv0"; | |
1756 | break; | |
1757 | case QFMT_VFS_V1: | |
1758 | fmtname = "vfsv1"; | |
1759 | break; | |
1760 | } | |
1761 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1762 | } | |
1763 | ||
1764 | if (sbi->s_qf_names[USRQUOTA]) | |
1765 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1766 | ||
1767 | if (sbi->s_qf_names[GRPQUOTA]) | |
1768 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
2adf6da8 TT |
1769 | #endif |
1770 | } | |
1771 | ||
5a916be1 TT |
1772 | static const char *token2str(int token) |
1773 | { | |
50df9fd5 | 1774 | const struct match_token *t; |
5a916be1 TT |
1775 | |
1776 | for (t = tokens; t->token != Opt_err; t++) | |
1777 | if (t->token == token && !strchr(t->pattern, '=')) | |
1778 | break; | |
1779 | return t->pattern; | |
1780 | } | |
1781 | ||
2adf6da8 TT |
1782 | /* |
1783 | * Show an option if | |
1784 | * - it's set to a non-default value OR | |
1785 | * - if the per-sb default is different from the global default | |
1786 | */ | |
66acdcf4 TT |
1787 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1788 | int nodefs) | |
2adf6da8 | 1789 | { |
2adf6da8 TT |
1790 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1791 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1792 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1793 | const struct mount_opts *m; |
66acdcf4 | 1794 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1795 | |
66acdcf4 TT |
1796 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1797 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1798 | |
1799 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1800 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1801 | ||
1802 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1803 | int want_set = m->flags & MOPT_SET; | |
1804 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1805 | (m->flags & MOPT_CLEAR_ERR)) | |
1806 | continue; | |
66acdcf4 | 1807 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1808 | continue; /* skip if same as the default */ |
1809 | if ((want_set && | |
1810 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1811 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1812 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1813 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1814 | } |
5a916be1 | 1815 | |
08cefc7a | 1816 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1817 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1818 | SEQ_OPTS_PRINT("resuid=%u", |
1819 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1820 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1821 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1822 | SEQ_OPTS_PRINT("resgid=%u", |
1823 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1824 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1825 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1826 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1827 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1828 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1829 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1830 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1831 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1832 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1833 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1834 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1835 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1836 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1837 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1838 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1839 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1840 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1841 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1842 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1843 | SEQ_OPTS_PUTS("data=journal"); | |
1844 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1845 | SEQ_OPTS_PUTS("data=ordered"); | |
1846 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1847 | SEQ_OPTS_PUTS("data=writeback"); | |
1848 | } | |
66acdcf4 TT |
1849 | if (nodefs || |
1850 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1851 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1852 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1853 | |
66acdcf4 TT |
1854 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1855 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1856 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1857 | if (nodefs || sbi->s_max_dir_size_kb) |
1858 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1859 | |
1860 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1861 | return 0; |
1862 | } | |
1863 | ||
66acdcf4 TT |
1864 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1865 | { | |
1866 | return _ext4_show_options(seq, root->d_sb, 0); | |
1867 | } | |
1868 | ||
1869 | static int options_seq_show(struct seq_file *seq, void *offset) | |
1870 | { | |
1871 | struct super_block *sb = seq->private; | |
1872 | int rc; | |
1873 | ||
1874 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1875 | rc = _ext4_show_options(seq, sb, 1); | |
1876 | seq_puts(seq, "\n"); | |
1877 | return rc; | |
1878 | } | |
1879 | ||
1880 | static int options_open_fs(struct inode *inode, struct file *file) | |
1881 | { | |
d9dda78b | 1882 | return single_open(file, options_seq_show, PDE_DATA(inode)); |
66acdcf4 TT |
1883 | } |
1884 | ||
1885 | static const struct file_operations ext4_seq_options_fops = { | |
1886 | .owner = THIS_MODULE, | |
1887 | .open = options_open_fs, | |
1888 | .read = seq_read, | |
1889 | .llseek = seq_lseek, | |
1890 | .release = single_release, | |
1891 | }; | |
1892 | ||
617ba13b | 1893 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1894 | int read_only) |
1895 | { | |
617ba13b | 1896 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1897 | int res = 0; |
1898 | ||
617ba13b | 1899 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1900 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1901 | "forcing read-only mode"); | |
ac27a0ec DK |
1902 | res = MS_RDONLY; |
1903 | } | |
1904 | if (read_only) | |
281b5995 | 1905 | goto done; |
617ba13b | 1906 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1907 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1908 | "running e2fsck is recommended"); | |
c8b459f4 | 1909 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
1910 | ext4_msg(sb, KERN_WARNING, |
1911 | "warning: mounting fs with errors, " | |
1912 | "running e2fsck is recommended"); | |
ed3ce80a | 1913 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1914 | le16_to_cpu(es->s_mnt_count) >= |
1915 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1916 | ext4_msg(sb, KERN_WARNING, |
1917 | "warning: maximal mount count reached, " | |
1918 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1919 | else if (le32_to_cpu(es->s_checkinterval) && |
1920 | (le32_to_cpu(es->s_lastcheck) + | |
1921 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1922 | ext4_msg(sb, KERN_WARNING, |
1923 | "warning: checktime reached, " | |
1924 | "running e2fsck is recommended"); | |
0b8e58a1 | 1925 | if (!sbi->s_journal) |
0390131b | 1926 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1927 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1928 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1929 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1930 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1931 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1932 | if (sbi->s_journal) |
1933 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1934 | |
e2d67052 | 1935 | ext4_commit_super(sb, 1); |
281b5995 | 1936 | done: |
ac27a0ec | 1937 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1938 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1939 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1940 | sb->s_blocksize, |
1941 | sbi->s_groups_count, | |
617ba13b MC |
1942 | EXT4_BLOCKS_PER_GROUP(sb), |
1943 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1944 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1945 | |
7abc52c2 | 1946 | cleancache_init_fs(sb); |
ac27a0ec DK |
1947 | return res; |
1948 | } | |
1949 | ||
117fff10 TT |
1950 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1951 | { | |
1952 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1953 | struct flex_groups *new_groups; | |
1954 | int size; | |
1955 | ||
1956 | if (!sbi->s_log_groups_per_flex) | |
1957 | return 0; | |
1958 | ||
1959 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
1960 | if (size <= sbi->s_flex_groups_allocated) | |
1961 | return 0; | |
1962 | ||
1963 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
1964 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
1965 | if (!new_groups) { | |
1966 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
1967 | size / (int) sizeof(struct flex_groups)); | |
1968 | return -ENOMEM; | |
1969 | } | |
1970 | ||
1971 | if (sbi->s_flex_groups) { | |
1972 | memcpy(new_groups, sbi->s_flex_groups, | |
1973 | (sbi->s_flex_groups_allocated * | |
1974 | sizeof(struct flex_groups))); | |
b93b41d4 | 1975 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
1976 | } |
1977 | sbi->s_flex_groups = new_groups; | |
1978 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
1979 | return 0; | |
1980 | } | |
1981 | ||
772cb7c8 JS |
1982 | static int ext4_fill_flex_info(struct super_block *sb) |
1983 | { | |
1984 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1985 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 1986 | ext4_group_t flex_group; |
117fff10 | 1987 | int i, err; |
772cb7c8 | 1988 | |
503358ae | 1989 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 1990 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
1991 | sbi->s_log_groups_per_flex = 0; |
1992 | return 1; | |
1993 | } | |
1994 | ||
117fff10 TT |
1995 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
1996 | if (err) | |
9933fc0a | 1997 | goto failed; |
772cb7c8 | 1998 | |
772cb7c8 | 1999 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2000 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2001 | |
2002 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2003 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2004 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2005 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2006 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2007 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2008 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2009 | } |
2010 | ||
2011 | return 1; | |
2012 | failed: | |
2013 | return 0; | |
2014 | } | |
2015 | ||
feb0ab32 DW |
2016 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
2017 | struct ext4_group_desc *gdp) | |
717d50e4 | 2018 | { |
feb0ab32 | 2019 | int offset; |
717d50e4 | 2020 | __u16 crc = 0; |
feb0ab32 | 2021 | __le32 le_group = cpu_to_le32(block_group); |
717d50e4 | 2022 | |
9aa5d32b | 2023 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2024 | /* Use new metadata_csum algorithm */ |
d6a77105 | 2025 | __le16 save_csum; |
feb0ab32 DW |
2026 | __u32 csum32; |
2027 | ||
d6a77105 | 2028 | save_csum = gdp->bg_checksum; |
feb0ab32 DW |
2029 | gdp->bg_checksum = 0; |
2030 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2031 | sizeof(le_group)); | |
2032 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2033 | sbi->s_desc_size); | |
d6a77105 | 2034 | gdp->bg_checksum = save_csum; |
feb0ab32 DW |
2035 | |
2036 | crc = csum32 & 0xFFFF; | |
2037 | goto out; | |
717d50e4 AD |
2038 | } |
2039 | ||
feb0ab32 | 2040 | /* old crc16 code */ |
813d32f9 DW |
2041 | if (!(sbi->s_es->s_feature_ro_compat & |
2042 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) | |
2043 | return 0; | |
2044 | ||
feb0ab32 DW |
2045 | offset = offsetof(struct ext4_group_desc, bg_checksum); |
2046 | ||
2047 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2048 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2049 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2050 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2051 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2052 | if ((sbi->s_es->s_feature_incompat & | |
2053 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2054 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2055 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2056 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2057 | offset); | |
2058 | ||
2059 | out: | |
717d50e4 AD |
2060 | return cpu_to_le16(crc); |
2061 | } | |
2062 | ||
feb0ab32 | 2063 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2064 | struct ext4_group_desc *gdp) |
2065 | { | |
feb0ab32 DW |
2066 | if (ext4_has_group_desc_csum(sb) && |
2067 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), | |
2068 | block_group, gdp))) | |
717d50e4 AD |
2069 | return 0; |
2070 | ||
2071 | return 1; | |
2072 | } | |
2073 | ||
feb0ab32 DW |
2074 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2075 | struct ext4_group_desc *gdp) | |
2076 | { | |
2077 | if (!ext4_has_group_desc_csum(sb)) | |
2078 | return; | |
2079 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); | |
2080 | } | |
2081 | ||
ac27a0ec | 2082 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2083 | static int ext4_check_descriptors(struct super_block *sb, |
2084 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2085 | { |
617ba13b MC |
2086 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2087 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2088 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2089 | ext4_fsblk_t block_bitmap; |
2090 | ext4_fsblk_t inode_bitmap; | |
2091 | ext4_fsblk_t inode_table; | |
ce421581 | 2092 | int flexbg_flag = 0; |
bfff6873 | 2093 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2094 | |
ce421581 JS |
2095 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2096 | flexbg_flag = 1; | |
2097 | ||
af5bc92d | 2098 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2099 | |
197cd65a AM |
2100 | for (i = 0; i < sbi->s_groups_count; i++) { |
2101 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2102 | ||
ce421581 | 2103 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2104 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2105 | else |
2106 | last_block = first_block + | |
617ba13b | 2107 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2108 | |
bfff6873 LC |
2109 | if ((grp == sbi->s_groups_count) && |
2110 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2111 | grp = i; | |
2112 | ||
8fadc143 | 2113 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2114 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2115 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2116 | "Block bitmap for group %u not in group " |
b31e1552 | 2117 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2118 | return 0; |
2119 | } | |
8fadc143 | 2120 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2121 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2122 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2123 | "Inode bitmap for group %u not in group " |
b31e1552 | 2124 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2125 | return 0; |
2126 | } | |
8fadc143 | 2127 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2128 | if (inode_table < first_block || |
2b2d6d01 | 2129 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2130 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2131 | "Inode table for group %u not in group " |
b31e1552 | 2132 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2133 | return 0; |
2134 | } | |
955ce5f5 | 2135 | ext4_lock_group(sb, i); |
feb0ab32 | 2136 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2137 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2138 | "Checksum for group %u failed (%u!=%u)", | |
2139 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2140 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2141 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2142 | ext4_unlock_group(sb, i); |
8a266467 | 2143 | return 0; |
7ee1ec4c | 2144 | } |
717d50e4 | 2145 | } |
955ce5f5 | 2146 | ext4_unlock_group(sb, i); |
ce421581 JS |
2147 | if (!flexbg_flag) |
2148 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2149 | } |
bfff6873 LC |
2150 | if (NULL != first_not_zeroed) |
2151 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2152 | return 1; |
2153 | } | |
2154 | ||
617ba13b | 2155 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2156 | * the superblock) which were deleted from all directories, but held open by |
2157 | * a process at the time of a crash. We walk the list and try to delete these | |
2158 | * inodes at recovery time (only with a read-write filesystem). | |
2159 | * | |
2160 | * In order to keep the orphan inode chain consistent during traversal (in | |
2161 | * case of crash during recovery), we link each inode into the superblock | |
2162 | * orphan list_head and handle it the same way as an inode deletion during | |
2163 | * normal operation (which journals the operations for us). | |
2164 | * | |
2165 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2166 | * accidentally point at an in-use or already deleted inode. The worst that | |
2167 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2168 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2169 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2170 | * inode cleanup for us, so we can safely abort without any further action. | |
2171 | */ | |
2b2d6d01 TT |
2172 | static void ext4_orphan_cleanup(struct super_block *sb, |
2173 | struct ext4_super_block *es) | |
ac27a0ec DK |
2174 | { |
2175 | unsigned int s_flags = sb->s_flags; | |
2176 | int nr_orphans = 0, nr_truncates = 0; | |
2177 | #ifdef CONFIG_QUOTA | |
2178 | int i; | |
2179 | #endif | |
2180 | if (!es->s_last_orphan) { | |
2181 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2182 | return; | |
2183 | } | |
2184 | ||
a8f48a95 | 2185 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2186 | ext4_msg(sb, KERN_ERR, "write access " |
2187 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2188 | return; |
2189 | } | |
2190 | ||
d39195c3 AG |
2191 | /* Check if feature set would not allow a r/w mount */ |
2192 | if (!ext4_feature_set_ok(sb, 0)) { | |
2193 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2194 | "unknown ROCOMPAT features"); | |
2195 | return; | |
2196 | } | |
2197 | ||
617ba13b | 2198 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2199 | /* don't clear list on RO mount w/ errors */ |
2200 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2201 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2202 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2203 | es->s_last_orphan = 0; |
2204 | } | |
ac27a0ec DK |
2205 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2206 | return; | |
2207 | } | |
2208 | ||
2209 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2210 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2211 | sb->s_flags &= ~MS_RDONLY; |
2212 | } | |
2213 | #ifdef CONFIG_QUOTA | |
2214 | /* Needed for iput() to work correctly and not trash data */ | |
2215 | sb->s_flags |= MS_ACTIVE; | |
2216 | /* Turn on quotas so that they are updated correctly */ | |
a2d4a646 | 2217 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2218 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2219 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2220 | if (ret < 0) |
b31e1552 ES |
2221 | ext4_msg(sb, KERN_ERR, |
2222 | "Cannot turn on journaled " | |
2223 | "quota: error %d", ret); | |
ac27a0ec DK |
2224 | } |
2225 | } | |
2226 | #endif | |
2227 | ||
2228 | while (es->s_last_orphan) { | |
2229 | struct inode *inode; | |
2230 | ||
97bd42b9 JB |
2231 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2232 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2233 | es->s_last_orphan = 0; |
2234 | break; | |
2235 | } | |
2236 | ||
617ba13b | 2237 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2238 | dquot_initialize(inode); |
ac27a0ec | 2239 | if (inode->i_nlink) { |
566370a2 PT |
2240 | if (test_opt(sb, DEBUG)) |
2241 | ext4_msg(sb, KERN_DEBUG, | |
2242 | "%s: truncating inode %lu to %lld bytes", | |
2243 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2244 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2245 | inode->i_ino, inode->i_size); |
721e3eba | 2246 | mutex_lock(&inode->i_mutex); |
55f252c9 | 2247 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
617ba13b | 2248 | ext4_truncate(inode); |
721e3eba | 2249 | mutex_unlock(&inode->i_mutex); |
ac27a0ec DK |
2250 | nr_truncates++; |
2251 | } else { | |
566370a2 PT |
2252 | if (test_opt(sb, DEBUG)) |
2253 | ext4_msg(sb, KERN_DEBUG, | |
2254 | "%s: deleting unreferenced inode %lu", | |
2255 | __func__, inode->i_ino); | |
ac27a0ec DK |
2256 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2257 | inode->i_ino); | |
2258 | nr_orphans++; | |
2259 | } | |
2260 | iput(inode); /* The delete magic happens here! */ | |
2261 | } | |
2262 | ||
2b2d6d01 | 2263 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2264 | |
2265 | if (nr_orphans) | |
b31e1552 ES |
2266 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2267 | PLURAL(nr_orphans)); | |
ac27a0ec | 2268 | if (nr_truncates) |
b31e1552 ES |
2269 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2270 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2271 | #ifdef CONFIG_QUOTA |
2272 | /* Turn quotas off */ | |
a2d4a646 | 2273 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
ac27a0ec | 2274 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 2275 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2276 | } |
2277 | #endif | |
2278 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2279 | } | |
0b8e58a1 | 2280 | |
cd2291a4 ES |
2281 | /* |
2282 | * Maximal extent format file size. | |
2283 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2284 | * extent format containers, within a sector_t, and within i_blocks | |
2285 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2286 | * so that won't be a limiting factor. | |
2287 | * | |
f17722f9 LC |
2288 | * However there is other limiting factor. We do store extents in the form |
2289 | * of starting block and length, hence the resulting length of the extent | |
2290 | * covering maximum file size must fit into on-disk format containers as | |
2291 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2292 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2293 | * | |
cd2291a4 ES |
2294 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2295 | */ | |
f287a1a5 | 2296 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2297 | { |
2298 | loff_t res; | |
2299 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2300 | ||
2301 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2302 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2303 | /* |
90c699a9 | 2304 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2305 | * i_block represent total blocks in 512 bytes |
2306 | * 32 == size of vfs inode i_blocks * 8 | |
2307 | */ | |
2308 | upper_limit = (1LL << 32) - 1; | |
2309 | ||
2310 | /* total blocks in file system block size */ | |
2311 | upper_limit >>= (blkbits - 9); | |
2312 | upper_limit <<= blkbits; | |
2313 | } | |
2314 | ||
f17722f9 LC |
2315 | /* |
2316 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2317 | * by one fs block, so ee_len can cover the extent of maximum file | |
2318 | * size | |
2319 | */ | |
2320 | res = (1LL << 32) - 1; | |
cd2291a4 | 2321 | res <<= blkbits; |
cd2291a4 ES |
2322 | |
2323 | /* Sanity check against vm- & vfs- imposed limits */ | |
2324 | if (res > upper_limit) | |
2325 | res = upper_limit; | |
2326 | ||
2327 | return res; | |
2328 | } | |
ac27a0ec | 2329 | |
ac27a0ec | 2330 | /* |
cd2291a4 | 2331 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2332 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2333 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2334 | */ |
f287a1a5 | 2335 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2336 | { |
617ba13b | 2337 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2338 | int meta_blocks; |
2339 | loff_t upper_limit; | |
0b8e58a1 AD |
2340 | /* This is calculated to be the largest file size for a dense, block |
2341 | * mapped file such that the file's total number of 512-byte sectors, | |
2342 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2343 | * | |
2344 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2345 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2346 | */ |
2347 | ||
f287a1a5 | 2348 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2349 | /* |
90c699a9 | 2350 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2351 | * the inode i_block field represents total file blocks in |
2352 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2353 | */ |
2354 | upper_limit = (1LL << 32) - 1; | |
2355 | ||
2356 | /* total blocks in file system block size */ | |
2357 | upper_limit >>= (bits - 9); | |
2358 | ||
2359 | } else { | |
8180a562 AK |
2360 | /* |
2361 | * We use 48 bit ext4_inode i_blocks | |
2362 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2363 | * represent total number of blocks in | |
2364 | * file system block size | |
2365 | */ | |
0fc1b451 AK |
2366 | upper_limit = (1LL << 48) - 1; |
2367 | ||
0fc1b451 AK |
2368 | } |
2369 | ||
2370 | /* indirect blocks */ | |
2371 | meta_blocks = 1; | |
2372 | /* double indirect blocks */ | |
2373 | meta_blocks += 1 + (1LL << (bits-2)); | |
2374 | /* tripple indirect blocks */ | |
2375 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2376 | ||
2377 | upper_limit -= meta_blocks; | |
2378 | upper_limit <<= bits; | |
ac27a0ec DK |
2379 | |
2380 | res += 1LL << (bits-2); | |
2381 | res += 1LL << (2*(bits-2)); | |
2382 | res += 1LL << (3*(bits-2)); | |
2383 | res <<= bits; | |
2384 | if (res > upper_limit) | |
2385 | res = upper_limit; | |
0fc1b451 AK |
2386 | |
2387 | if (res > MAX_LFS_FILESIZE) | |
2388 | res = MAX_LFS_FILESIZE; | |
2389 | ||
ac27a0ec DK |
2390 | return res; |
2391 | } | |
2392 | ||
617ba13b | 2393 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2394 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2395 | { |
617ba13b | 2396 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2397 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2398 | int has_super = 0; |
2399 | ||
2400 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2401 | ||
617ba13b | 2402 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2403 | nr < first_meta_bg) |
70bbb3e0 | 2404 | return logical_sb_block + nr + 1; |
ac27a0ec | 2405 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2406 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2407 | has_super = 1; |
0b8e58a1 | 2408 | |
bd63f6b0 DW |
2409 | /* |
2410 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2411 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2412 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2413 | * compensate. | |
2414 | */ | |
2415 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2416 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2417 | has_super++; | |
2418 | ||
617ba13b | 2419 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2420 | } |
2421 | ||
c9de560d AT |
2422 | /** |
2423 | * ext4_get_stripe_size: Get the stripe size. | |
2424 | * @sbi: In memory super block info | |
2425 | * | |
2426 | * If we have specified it via mount option, then | |
2427 | * use the mount option value. If the value specified at mount time is | |
2428 | * greater than the blocks per group use the super block value. | |
2429 | * If the super block value is greater than blocks per group return 0. | |
2430 | * Allocator needs it be less than blocks per group. | |
2431 | * | |
2432 | */ | |
2433 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2434 | { | |
2435 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2436 | unsigned long stripe_width = | |
2437 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2438 | int ret; |
c9de560d AT |
2439 | |
2440 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2441 | ret = sbi->s_stripe; |
2442 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2443 | ret = stripe_width; | |
2444 | else if (stride <= sbi->s_blocks_per_group) | |
2445 | ret = stride; | |
2446 | else | |
2447 | ret = 0; | |
c9de560d | 2448 | |
3eb08658 DE |
2449 | /* |
2450 | * If the stripe width is 1, this makes no sense and | |
2451 | * we set it to 0 to turn off stripe handling code. | |
2452 | */ | |
2453 | if (ret <= 1) | |
2454 | ret = 0; | |
c9de560d | 2455 | |
3eb08658 | 2456 | return ret; |
c9de560d | 2457 | } |
ac27a0ec | 2458 | |
3197ebdb TT |
2459 | /* sysfs supprt */ |
2460 | ||
2461 | struct ext4_attr { | |
2462 | struct attribute attr; | |
2463 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2464 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb | 2465 | const char *, size_t); |
f2d50a65 JK |
2466 | union { |
2467 | int offset; | |
2468 | int deprecated_val; | |
2469 | } u; | |
3197ebdb TT |
2470 | }; |
2471 | ||
27dd4385 LC |
2472 | static int parse_strtoull(const char *buf, |
2473 | unsigned long long max, unsigned long long *value) | |
2474 | { | |
2475 | int ret; | |
2476 | ||
2477 | ret = kstrtoull(skip_spaces(buf), 0, value); | |
2478 | if (!ret && *value > max) | |
2479 | ret = -EINVAL; | |
2480 | return ret; | |
2481 | } | |
2482 | ||
3197ebdb TT |
2483 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
2484 | struct ext4_sb_info *sbi, | |
2485 | char *buf) | |
2486 | { | |
2487 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2488 | (s64) EXT4_C2B(sbi, |
2489 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2490 | } |
2491 | ||
2492 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2493 | struct ext4_sb_info *sbi, char *buf) | |
2494 | { | |
2495 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2496 | ||
f613dfcb TT |
2497 | if (!sb->s_bdev->bd_part) |
2498 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2499 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2500 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2501 | sbi->s_sectors_written_start) >> 1); | |
2502 | } | |
2503 | ||
2504 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2505 | struct ext4_sb_info *sbi, char *buf) | |
2506 | { | |
2507 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2508 | ||
f613dfcb TT |
2509 | if (!sb->s_bdev->bd_part) |
2510 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2511 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2512 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2513 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2514 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2515 | } |
2516 | ||
2517 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2518 | struct ext4_sb_info *sbi, | |
2519 | const char *buf, size_t count) | |
2520 | { | |
2521 | unsigned long t; | |
e1091b15 | 2522 | int ret; |
3197ebdb | 2523 | |
e1091b15 LC |
2524 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2525 | if (ret) | |
2526 | return ret; | |
3197ebdb | 2527 | |
e1091b15 | 2528 | if (t && (!is_power_of_2(t) || t > 0x40000000)) |
3197ebdb TT |
2529 | return -EINVAL; |
2530 | ||
2531 | sbi->s_inode_readahead_blks = t; | |
2532 | return count; | |
2533 | } | |
2534 | ||
2535 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2536 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb | 2537 | { |
f2d50a65 | 2538 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
3197ebdb TT |
2539 | |
2540 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2541 | } | |
2542 | ||
2543 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2544 | struct ext4_sb_info *sbi, | |
2545 | const char *buf, size_t count) | |
2546 | { | |
f2d50a65 | 2547 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
3197ebdb | 2548 | unsigned long t; |
e1091b15 | 2549 | int ret; |
3197ebdb | 2550 | |
e1091b15 LC |
2551 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2552 | if (ret) | |
2553 | return ret; | |
3197ebdb TT |
2554 | *ui = t; |
2555 | return count; | |
2556 | } | |
2557 | ||
52c198c6 LC |
2558 | static ssize_t es_ui_show(struct ext4_attr *a, |
2559 | struct ext4_sb_info *sbi, char *buf) | |
2560 | { | |
2561 | ||
2562 | unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + | |
2563 | a->u.offset); | |
2564 | ||
2565 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2566 | } | |
2567 | ||
27dd4385 LC |
2568 | static ssize_t reserved_clusters_show(struct ext4_attr *a, |
2569 | struct ext4_sb_info *sbi, char *buf) | |
2570 | { | |
2571 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2572 | (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); | |
2573 | } | |
2574 | ||
2575 | static ssize_t reserved_clusters_store(struct ext4_attr *a, | |
2576 | struct ext4_sb_info *sbi, | |
2577 | const char *buf, size_t count) | |
2578 | { | |
2579 | unsigned long long val; | |
2580 | int ret; | |
2581 | ||
2582 | if (parse_strtoull(buf, -1ULL, &val)) | |
2583 | return -EINVAL; | |
2584 | ret = ext4_reserve_clusters(sbi, val); | |
2585 | ||
2586 | return ret ? ret : count; | |
2587 | } | |
2588 | ||
2c0544b2 TT |
2589 | static ssize_t trigger_test_error(struct ext4_attr *a, |
2590 | struct ext4_sb_info *sbi, | |
2591 | const char *buf, size_t count) | |
2592 | { | |
2593 | int len = count; | |
2594 | ||
2595 | if (!capable(CAP_SYS_ADMIN)) | |
2596 | return -EPERM; | |
2597 | ||
2598 | if (len && buf[len-1] == '\n') | |
2599 | len--; | |
2600 | ||
2601 | if (len) | |
2602 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
2603 | return count; | |
2604 | } | |
2605 | ||
f2d50a65 JK |
2606 | static ssize_t sbi_deprecated_show(struct ext4_attr *a, |
2607 | struct ext4_sb_info *sbi, char *buf) | |
2608 | { | |
2609 | return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); | |
2610 | } | |
2611 | ||
3197ebdb TT |
2612 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
2613 | static struct ext4_attr ext4_attr_##_name = { \ | |
2614 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2615 | .show = _show, \ | |
2616 | .store = _store, \ | |
f2d50a65 JK |
2617 | .u = { \ |
2618 | .offset = offsetof(struct ext4_sb_info, _elname),\ | |
2619 | }, \ | |
3197ebdb | 2620 | } |
52c198c6 LC |
2621 | |
2622 | #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ | |
2623 | static struct ext4_attr ext4_attr_##_name = { \ | |
2624 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2625 | .show = _show, \ | |
2626 | .store = _store, \ | |
2627 | .u = { \ | |
2628 | .offset = offsetof(struct ext4_super_block, _elname), \ | |
2629 | }, \ | |
2630 | } | |
2631 | ||
3197ebdb TT |
2632 | #define EXT4_ATTR(name, mode, show, store) \ |
2633 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2634 | ||
857ac889 | 2635 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2636 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2637 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
52c198c6 LC |
2638 | |
2639 | #define EXT4_RO_ATTR_ES_UI(name, elname) \ | |
2640 | EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) | |
3197ebdb TT |
2641 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ |
2642 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
52c198c6 | 2643 | |
3197ebdb | 2644 | #define ATTR_LIST(name) &ext4_attr_##name.attr |
f2d50a65 JK |
2645 | #define EXT4_DEPRECATED_ATTR(_name, _val) \ |
2646 | static struct ext4_attr ext4_attr_##_name = { \ | |
2647 | .attr = {.name = __stringify(_name), .mode = 0444 }, \ | |
2648 | .show = sbi_deprecated_show, \ | |
2649 | .u = { \ | |
2650 | .deprecated_val = _val, \ | |
2651 | }, \ | |
2652 | } | |
3197ebdb TT |
2653 | |
2654 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2655 | EXT4_RO_ATTR(session_write_kbytes); | |
2656 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
27dd4385 | 2657 | EXT4_RW_ATTR(reserved_clusters); |
3197ebdb TT |
2658 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2659 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2660 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2661 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2662 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2663 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2664 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2665 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2666 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
f2d50a65 | 2667 | EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); |
67a5da56 | 2668 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
2c0544b2 | 2669 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
efbed4dc TT |
2670 | EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); |
2671 | EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); | |
2672 | EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); | |
2673 | EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); | |
2674 | EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); | |
2675 | EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); | |
52c198c6 LC |
2676 | EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); |
2677 | EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); | |
2678 | EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); | |
3197ebdb TT |
2679 | |
2680 | static struct attribute *ext4_attrs[] = { | |
2681 | ATTR_LIST(delayed_allocation_blocks), | |
2682 | ATTR_LIST(session_write_kbytes), | |
2683 | ATTR_LIST(lifetime_write_kbytes), | |
27dd4385 | 2684 | ATTR_LIST(reserved_clusters), |
3197ebdb | 2685 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2686 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2687 | ATTR_LIST(mb_stats), |
2688 | ATTR_LIST(mb_max_to_scan), | |
2689 | ATTR_LIST(mb_min_to_scan), | |
2690 | ATTR_LIST(mb_order2_req), | |
2691 | ATTR_LIST(mb_stream_req), | |
2692 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2693 | ATTR_LIST(max_writeback_mb_bump), |
67a5da56 | 2694 | ATTR_LIST(extent_max_zeroout_kb), |
2c0544b2 | 2695 | ATTR_LIST(trigger_fs_error), |
efbed4dc TT |
2696 | ATTR_LIST(err_ratelimit_interval_ms), |
2697 | ATTR_LIST(err_ratelimit_burst), | |
2698 | ATTR_LIST(warning_ratelimit_interval_ms), | |
2699 | ATTR_LIST(warning_ratelimit_burst), | |
2700 | ATTR_LIST(msg_ratelimit_interval_ms), | |
2701 | ATTR_LIST(msg_ratelimit_burst), | |
52c198c6 LC |
2702 | ATTR_LIST(errors_count), |
2703 | ATTR_LIST(first_error_time), | |
2704 | ATTR_LIST(last_error_time), | |
3197ebdb TT |
2705 | NULL, |
2706 | }; | |
2707 | ||
857ac889 LC |
2708 | /* Features this copy of ext4 supports */ |
2709 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2710 | EXT4_INFO_ATTR(batched_discard); |
5e7bbef1 | 2711 | EXT4_INFO_ATTR(meta_bg_resize); |
6ddb2447 | 2712 | EXT4_INFO_ATTR(encryption); |
857ac889 LC |
2713 | |
2714 | static struct attribute *ext4_feat_attrs[] = { | |
2715 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2716 | ATTR_LIST(batched_discard), |
5e7bbef1 | 2717 | ATTR_LIST(meta_bg_resize), |
6ddb2447 | 2718 | ATTR_LIST(encryption), |
857ac889 LC |
2719 | NULL, |
2720 | }; | |
2721 | ||
3197ebdb TT |
2722 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2723 | struct attribute *attr, char *buf) | |
2724 | { | |
2725 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2726 | s_kobj); | |
2727 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2728 | ||
2729 | return a->show ? a->show(a, sbi, buf) : 0; | |
2730 | } | |
2731 | ||
2732 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2733 | struct attribute *attr, | |
2734 | const char *buf, size_t len) | |
2735 | { | |
2736 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2737 | s_kobj); | |
2738 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2739 | ||
2740 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2741 | } | |
2742 | ||
2743 | static void ext4_sb_release(struct kobject *kobj) | |
2744 | { | |
2745 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2746 | s_kobj); | |
2747 | complete(&sbi->s_kobj_unregister); | |
2748 | } | |
2749 | ||
52cf25d0 | 2750 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2751 | .show = ext4_attr_show, |
2752 | .store = ext4_attr_store, | |
2753 | }; | |
2754 | ||
2755 | static struct kobj_type ext4_ktype = { | |
2756 | .default_attrs = ext4_attrs, | |
2757 | .sysfs_ops = &ext4_attr_ops, | |
2758 | .release = ext4_sb_release, | |
2759 | }; | |
2760 | ||
857ac889 LC |
2761 | static void ext4_feat_release(struct kobject *kobj) |
2762 | { | |
2763 | complete(&ext4_feat->f_kobj_unregister); | |
2764 | } | |
2765 | ||
c7f72543 LC |
2766 | static ssize_t ext4_feat_show(struct kobject *kobj, |
2767 | struct attribute *attr, char *buf) | |
2768 | { | |
2769 | return snprintf(buf, PAGE_SIZE, "supported\n"); | |
2770 | } | |
2771 | ||
2772 | /* | |
2773 | * We can not use ext4_attr_show/store because it relies on the kobject | |
2774 | * being embedded in the ext4_sb_info structure which is definitely not | |
2775 | * true in this case. | |
2776 | */ | |
2777 | static const struct sysfs_ops ext4_feat_ops = { | |
2778 | .show = ext4_feat_show, | |
2779 | .store = NULL, | |
2780 | }; | |
2781 | ||
857ac889 LC |
2782 | static struct kobj_type ext4_feat_ktype = { |
2783 | .default_attrs = ext4_feat_attrs, | |
c7f72543 | 2784 | .sysfs_ops = &ext4_feat_ops, |
857ac889 LC |
2785 | .release = ext4_feat_release, |
2786 | }; | |
2787 | ||
a13fb1a4 ES |
2788 | /* |
2789 | * Check whether this filesystem can be mounted based on | |
2790 | * the features present and the RDONLY/RDWR mount requested. | |
2791 | * Returns 1 if this filesystem can be mounted as requested, | |
2792 | * 0 if it cannot be. | |
2793 | */ | |
2794 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2795 | { | |
2796 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2797 | ext4_msg(sb, KERN_ERR, | |
2798 | "Couldn't mount because of " | |
2799 | "unsupported optional features (%x)", | |
2800 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2801 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2802 | return 0; | |
2803 | } | |
2804 | ||
2805 | if (readonly) | |
2806 | return 1; | |
2807 | ||
2cb5cc8b DW |
2808 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_READONLY)) { |
2809 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); | |
2810 | sb->s_flags |= MS_RDONLY; | |
2811 | return 1; | |
2812 | } | |
2813 | ||
a13fb1a4 ES |
2814 | /* Check that feature set is OK for a read-write mount */ |
2815 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2816 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2817 | "unsupported optional features (%x)", | |
2818 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2819 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2820 | return 0; | |
2821 | } | |
2822 | /* | |
2823 | * Large file size enabled file system can only be mounted | |
2824 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2825 | */ | |
2826 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2827 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2828 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2829 | "cannot be mounted RDWR without " | |
2830 | "CONFIG_LBDAF"); | |
2831 | return 0; | |
2832 | } | |
2833 | } | |
bab08ab9 TT |
2834 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2835 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2836 | ext4_msg(sb, KERN_ERR, | |
2837 | "Can't support bigalloc feature without " | |
2838 | "extents feature\n"); | |
2839 | return 0; | |
2840 | } | |
7c319d32 AK |
2841 | |
2842 | #ifndef CONFIG_QUOTA | |
2843 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
2844 | !readonly) { | |
2845 | ext4_msg(sb, KERN_ERR, | |
2846 | "Filesystem with quota feature cannot be mounted RDWR " | |
2847 | "without CONFIG_QUOTA"); | |
2848 | return 0; | |
2849 | } | |
2850 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2851 | return 1; |
2852 | } | |
2853 | ||
66e61a9e TT |
2854 | /* |
2855 | * This function is called once a day if we have errors logged | |
2856 | * on the file system | |
2857 | */ | |
2858 | static void print_daily_error_info(unsigned long arg) | |
2859 | { | |
2860 | struct super_block *sb = (struct super_block *) arg; | |
2861 | struct ext4_sb_info *sbi; | |
2862 | struct ext4_super_block *es; | |
2863 | ||
2864 | sbi = EXT4_SB(sb); | |
2865 | es = sbi->s_es; | |
2866 | ||
2867 | if (es->s_error_count) | |
ae0f78de TT |
2868 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2869 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2870 | le32_to_cpu(es->s_error_count)); |
2871 | if (es->s_first_error_time) { | |
ae0f78de | 2872 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2873 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2874 | (int) sizeof(es->s_first_error_func), | |
2875 | es->s_first_error_func, | |
2876 | le32_to_cpu(es->s_first_error_line)); | |
2877 | if (es->s_first_error_ino) | |
2878 | printk(": inode %u", | |
2879 | le32_to_cpu(es->s_first_error_ino)); | |
2880 | if (es->s_first_error_block) | |
2881 | printk(": block %llu", (unsigned long long) | |
2882 | le64_to_cpu(es->s_first_error_block)); | |
2883 | printk("\n"); | |
2884 | } | |
2885 | if (es->s_last_error_time) { | |
ae0f78de | 2886 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2887 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2888 | (int) sizeof(es->s_last_error_func), | |
2889 | es->s_last_error_func, | |
2890 | le32_to_cpu(es->s_last_error_line)); | |
2891 | if (es->s_last_error_ino) | |
2892 | printk(": inode %u", | |
2893 | le32_to_cpu(es->s_last_error_ino)); | |
2894 | if (es->s_last_error_block) | |
2895 | printk(": block %llu", (unsigned long long) | |
2896 | le64_to_cpu(es->s_last_error_block)); | |
2897 | printk("\n"); | |
2898 | } | |
2899 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2900 | } | |
2901 | ||
bfff6873 LC |
2902 | /* Find next suitable group and run ext4_init_inode_table */ |
2903 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2904 | { | |
2905 | struct ext4_group_desc *gdp = NULL; | |
2906 | ext4_group_t group, ngroups; | |
2907 | struct super_block *sb; | |
2908 | unsigned long timeout = 0; | |
2909 | int ret = 0; | |
2910 | ||
2911 | sb = elr->lr_super; | |
2912 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2913 | ||
8e8ad8a5 | 2914 | sb_start_write(sb); |
bfff6873 LC |
2915 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2916 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2917 | if (!gdp) { | |
2918 | ret = 1; | |
2919 | break; | |
2920 | } | |
2921 | ||
2922 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2923 | break; | |
2924 | } | |
2925 | ||
7f511862 | 2926 | if (group >= ngroups) |
bfff6873 LC |
2927 | ret = 1; |
2928 | ||
2929 | if (!ret) { | |
2930 | timeout = jiffies; | |
2931 | ret = ext4_init_inode_table(sb, group, | |
2932 | elr->lr_timeout ? 0 : 1); | |
2933 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2934 | timeout = (jiffies - timeout) * |
2935 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2936 | elr->lr_timeout = timeout; |
2937 | } | |
2938 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2939 | elr->lr_next_group = group + 1; | |
2940 | } | |
8e8ad8a5 | 2941 | sb_end_write(sb); |
bfff6873 LC |
2942 | |
2943 | return ret; | |
2944 | } | |
2945 | ||
2946 | /* | |
2947 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2948 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2949 | */ |
2950 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2951 | { | |
2952 | struct ext4_sb_info *sbi; | |
2953 | ||
2954 | if (!elr) | |
2955 | return; | |
2956 | ||
2957 | sbi = elr->lr_sbi; | |
2958 | ||
2959 | list_del(&elr->lr_request); | |
2960 | sbi->s_li_request = NULL; | |
2961 | kfree(elr); | |
2962 | } | |
2963 | ||
2964 | static void ext4_unregister_li_request(struct super_block *sb) | |
2965 | { | |
1bb933fb LC |
2966 | mutex_lock(&ext4_li_mtx); |
2967 | if (!ext4_li_info) { | |
2968 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2969 | return; |
1bb933fb | 2970 | } |
bfff6873 LC |
2971 | |
2972 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2973 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2974 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2975 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2976 | } |
2977 | ||
8f1f7453 ES |
2978 | static struct task_struct *ext4_lazyinit_task; |
2979 | ||
bfff6873 LC |
2980 | /* |
2981 | * This is the function where ext4lazyinit thread lives. It walks | |
2982 | * through the request list searching for next scheduled filesystem. | |
2983 | * When such a fs is found, run the lazy initialization request | |
2984 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2985 | * function. Based on that time we compute next schedule time of | |
2986 | * the request. When walking through the list is complete, compute | |
2987 | * next waking time and put itself into sleep. | |
2988 | */ | |
2989 | static int ext4_lazyinit_thread(void *arg) | |
2990 | { | |
2991 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2992 | struct list_head *pos, *n; | |
2993 | struct ext4_li_request *elr; | |
4ed5c033 | 2994 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2995 | |
2996 | BUG_ON(NULL == eli); | |
2997 | ||
bfff6873 LC |
2998 | cont_thread: |
2999 | while (true) { | |
3000 | next_wakeup = MAX_JIFFY_OFFSET; | |
3001 | ||
3002 | mutex_lock(&eli->li_list_mtx); | |
3003 | if (list_empty(&eli->li_request_list)) { | |
3004 | mutex_unlock(&eli->li_list_mtx); | |
3005 | goto exit_thread; | |
3006 | } | |
3007 | ||
3008 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
3009 | elr = list_entry(pos, struct ext4_li_request, | |
3010 | lr_request); | |
3011 | ||
b2c78cd0 TT |
3012 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
3013 | if (ext4_run_li_request(elr) != 0) { | |
3014 | /* error, remove the lazy_init job */ | |
3015 | ext4_remove_li_request(elr); | |
3016 | continue; | |
3017 | } | |
bfff6873 LC |
3018 | } |
3019 | ||
3020 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
3021 | next_wakeup = elr->lr_next_sched; | |
3022 | } | |
3023 | mutex_unlock(&eli->li_list_mtx); | |
3024 | ||
a0acae0e | 3025 | try_to_freeze(); |
bfff6873 | 3026 | |
4ed5c033 LC |
3027 | cur = jiffies; |
3028 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 3029 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
3030 | cond_resched(); |
3031 | continue; | |
3032 | } | |
3033 | ||
4ed5c033 LC |
3034 | schedule_timeout_interruptible(next_wakeup - cur); |
3035 | ||
8f1f7453 ES |
3036 | if (kthread_should_stop()) { |
3037 | ext4_clear_request_list(); | |
3038 | goto exit_thread; | |
3039 | } | |
bfff6873 LC |
3040 | } |
3041 | ||
3042 | exit_thread: | |
3043 | /* | |
3044 | * It looks like the request list is empty, but we need | |
3045 | * to check it under the li_list_mtx lock, to prevent any | |
3046 | * additions into it, and of course we should lock ext4_li_mtx | |
3047 | * to atomically free the list and ext4_li_info, because at | |
3048 | * this point another ext4 filesystem could be registering | |
3049 | * new one. | |
3050 | */ | |
3051 | mutex_lock(&ext4_li_mtx); | |
3052 | mutex_lock(&eli->li_list_mtx); | |
3053 | if (!list_empty(&eli->li_request_list)) { | |
3054 | mutex_unlock(&eli->li_list_mtx); | |
3055 | mutex_unlock(&ext4_li_mtx); | |
3056 | goto cont_thread; | |
3057 | } | |
3058 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
3059 | kfree(ext4_li_info); |
3060 | ext4_li_info = NULL; | |
3061 | mutex_unlock(&ext4_li_mtx); | |
3062 | ||
3063 | return 0; | |
3064 | } | |
3065 | ||
3066 | static void ext4_clear_request_list(void) | |
3067 | { | |
3068 | struct list_head *pos, *n; | |
3069 | struct ext4_li_request *elr; | |
3070 | ||
3071 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
3072 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
3073 | elr = list_entry(pos, struct ext4_li_request, | |
3074 | lr_request); | |
3075 | ext4_remove_li_request(elr); | |
3076 | } | |
3077 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3078 | } | |
3079 | ||
3080 | static int ext4_run_lazyinit_thread(void) | |
3081 | { | |
8f1f7453 ES |
3082 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
3083 | ext4_li_info, "ext4lazyinit"); | |
3084 | if (IS_ERR(ext4_lazyinit_task)) { | |
3085 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 3086 | ext4_clear_request_list(); |
bfff6873 LC |
3087 | kfree(ext4_li_info); |
3088 | ext4_li_info = NULL; | |
92b97816 | 3089 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
3090 | "initialization thread\n", |
3091 | err); | |
3092 | return err; | |
3093 | } | |
3094 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
3095 | return 0; |
3096 | } | |
3097 | ||
3098 | /* | |
3099 | * Check whether it make sense to run itable init. thread or not. | |
3100 | * If there is at least one uninitialized inode table, return | |
3101 | * corresponding group number, else the loop goes through all | |
3102 | * groups and return total number of groups. | |
3103 | */ | |
3104 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
3105 | { | |
3106 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
3107 | struct ext4_group_desc *gdp = NULL; | |
3108 | ||
3109 | for (group = 0; group < ngroups; group++) { | |
3110 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3111 | if (!gdp) | |
3112 | continue; | |
3113 | ||
3114 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3115 | break; | |
3116 | } | |
3117 | ||
3118 | return group; | |
3119 | } | |
3120 | ||
3121 | static int ext4_li_info_new(void) | |
3122 | { | |
3123 | struct ext4_lazy_init *eli = NULL; | |
3124 | ||
3125 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3126 | if (!eli) | |
3127 | return -ENOMEM; | |
3128 | ||
bfff6873 LC |
3129 | INIT_LIST_HEAD(&eli->li_request_list); |
3130 | mutex_init(&eli->li_list_mtx); | |
3131 | ||
bfff6873 LC |
3132 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3133 | ||
3134 | ext4_li_info = eli; | |
3135 | ||
3136 | return 0; | |
3137 | } | |
3138 | ||
3139 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3140 | ext4_group_t start) | |
3141 | { | |
3142 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3143 | struct ext4_li_request *elr; | |
bfff6873 LC |
3144 | |
3145 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3146 | if (!elr) | |
3147 | return NULL; | |
3148 | ||
3149 | elr->lr_super = sb; | |
3150 | elr->lr_sbi = sbi; | |
3151 | elr->lr_next_group = start; | |
3152 | ||
3153 | /* | |
3154 | * Randomize first schedule time of the request to | |
3155 | * spread the inode table initialization requests | |
3156 | * better. | |
3157 | */ | |
dd1f723b TT |
3158 | elr->lr_next_sched = jiffies + (prandom_u32() % |
3159 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
3160 | return elr; |
3161 | } | |
3162 | ||
7f511862 TT |
3163 | int ext4_register_li_request(struct super_block *sb, |
3164 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3165 | { |
3166 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3167 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3168 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3169 | int ret = 0; |
bfff6873 | 3170 | |
7f511862 | 3171 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3172 | if (sbi->s_li_request != NULL) { |
3173 | /* | |
3174 | * Reset timeout so it can be computed again, because | |
3175 | * s_li_wait_mult might have changed. | |
3176 | */ | |
3177 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3178 | goto out; |
51ce6511 | 3179 | } |
bfff6873 LC |
3180 | |
3181 | if (first_not_zeroed == ngroups || | |
3182 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3183 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3184 | goto out; |
bfff6873 LC |
3185 | |
3186 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3187 | if (!elr) { |
3188 | ret = -ENOMEM; | |
3189 | goto out; | |
3190 | } | |
bfff6873 LC |
3191 | |
3192 | if (NULL == ext4_li_info) { | |
3193 | ret = ext4_li_info_new(); | |
3194 | if (ret) | |
3195 | goto out; | |
3196 | } | |
3197 | ||
3198 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3199 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3200 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3201 | ||
3202 | sbi->s_li_request = elr; | |
46e4690b TM |
3203 | /* |
3204 | * set elr to NULL here since it has been inserted to | |
3205 | * the request_list and the removal and free of it is | |
3206 | * handled by ext4_clear_request_list from now on. | |
3207 | */ | |
3208 | elr = NULL; | |
bfff6873 LC |
3209 | |
3210 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3211 | ret = ext4_run_lazyinit_thread(); | |
3212 | if (ret) | |
3213 | goto out; | |
3214 | } | |
bfff6873 | 3215 | out: |
beed5ecb NK |
3216 | mutex_unlock(&ext4_li_mtx); |
3217 | if (ret) | |
bfff6873 | 3218 | kfree(elr); |
bfff6873 LC |
3219 | return ret; |
3220 | } | |
3221 | ||
3222 | /* | |
3223 | * We do not need to lock anything since this is called on | |
3224 | * module unload. | |
3225 | */ | |
3226 | static void ext4_destroy_lazyinit_thread(void) | |
3227 | { | |
3228 | /* | |
3229 | * If thread exited earlier | |
3230 | * there's nothing to be done. | |
3231 | */ | |
8f1f7453 | 3232 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3233 | return; |
3234 | ||
8f1f7453 | 3235 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3236 | } |
3237 | ||
25ed6e8a DW |
3238 | static int set_journal_csum_feature_set(struct super_block *sb) |
3239 | { | |
3240 | int ret = 1; | |
3241 | int compat, incompat; | |
3242 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3243 | ||
9aa5d32b | 3244 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 3245 | /* journal checksum v3 */ |
25ed6e8a | 3246 | compat = 0; |
db9ee220 | 3247 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
3248 | } else { |
3249 | /* journal checksum v1 */ | |
3250 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3251 | incompat = 0; | |
3252 | } | |
3253 | ||
feb8c6d3 DW |
3254 | jbd2_journal_clear_features(sbi->s_journal, |
3255 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3256 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
3257 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
3258 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3259 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3260 | compat, 0, | |
3261 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3262 | incompat); | |
3263 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3264 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3265 | compat, 0, | |
3266 | incompat); | |
3267 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3268 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3269 | } else { | |
feb8c6d3 DW |
3270 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3271 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
3272 | } |
3273 | ||
3274 | return ret; | |
3275 | } | |
3276 | ||
952fc18e TT |
3277 | /* |
3278 | * Note: calculating the overhead so we can be compatible with | |
3279 | * historical BSD practice is quite difficult in the face of | |
3280 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3281 | * different block group can end up in the same allocation cluster. | |
3282 | * Calculating the exact overhead in the face of clustered allocation | |
3283 | * requires either O(all block bitmaps) in memory or O(number of block | |
3284 | * groups**2) in time. We will still calculate the superblock for | |
3285 | * older file systems --- and if we come across with a bigalloc file | |
3286 | * system with zero in s_overhead_clusters the estimate will be close to | |
3287 | * correct especially for very large cluster sizes --- but for newer | |
3288 | * file systems, it's better to calculate this figure once at mkfs | |
3289 | * time, and store it in the superblock. If the superblock value is | |
3290 | * present (even for non-bigalloc file systems), we will use it. | |
3291 | */ | |
3292 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3293 | char *buf) | |
3294 | { | |
3295 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3296 | struct ext4_group_desc *gdp; | |
3297 | ext4_fsblk_t first_block, last_block, b; | |
3298 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3299 | int s, j, count = 0; | |
3300 | ||
0548bbb8 TT |
3301 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) |
3302 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + | |
3303 | sbi->s_itb_per_group + 2); | |
3304 | ||
952fc18e TT |
3305 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3306 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3307 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3308 | for (i = 0; i < ngroups; i++) { | |
3309 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3310 | b = ext4_block_bitmap(sb, gdp); | |
3311 | if (b >= first_block && b <= last_block) { | |
3312 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3313 | count++; | |
3314 | } | |
3315 | b = ext4_inode_bitmap(sb, gdp); | |
3316 | if (b >= first_block && b <= last_block) { | |
3317 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3318 | count++; | |
3319 | } | |
3320 | b = ext4_inode_table(sb, gdp); | |
3321 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3322 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3323 | int c = EXT4_B2C(sbi, b - first_block); | |
3324 | ext4_set_bit(c, buf); | |
3325 | count++; | |
3326 | } | |
3327 | if (i != grp) | |
3328 | continue; | |
3329 | s = 0; | |
3330 | if (ext4_bg_has_super(sb, grp)) { | |
3331 | ext4_set_bit(s++, buf); | |
3332 | count++; | |
3333 | } | |
3334 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3335 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3336 | count++; | |
3337 | } | |
3338 | } | |
3339 | if (!count) | |
3340 | return 0; | |
3341 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3342 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3343 | } | |
3344 | ||
3345 | /* | |
3346 | * Compute the overhead and stash it in sbi->s_overhead | |
3347 | */ | |
3348 | int ext4_calculate_overhead(struct super_block *sb) | |
3349 | { | |
3350 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3351 | struct ext4_super_block *es = sbi->s_es; | |
3352 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3353 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3354 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3355 | |
952fc18e TT |
3356 | if (!buf) |
3357 | return -ENOMEM; | |
3358 | ||
3359 | /* | |
3360 | * Compute the overhead (FS structures). This is constant | |
3361 | * for a given filesystem unless the number of block groups | |
3362 | * changes so we cache the previous value until it does. | |
3363 | */ | |
3364 | ||
3365 | /* | |
3366 | * All of the blocks before first_data_block are overhead | |
3367 | */ | |
3368 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3369 | ||
3370 | /* | |
3371 | * Add the overhead found in each block group | |
3372 | */ | |
3373 | for (i = 0; i < ngroups; i++) { | |
3374 | int blks; | |
3375 | ||
3376 | blks = count_overhead(sb, i, buf); | |
3377 | overhead += blks; | |
3378 | if (blks) | |
3379 | memset(buf, 0, PAGE_SIZE); | |
3380 | cond_resched(); | |
3381 | } | |
b003b524 ES |
3382 | /* Add the internal journal blocks as well */ |
3383 | if (sbi->s_journal && !sbi->journal_bdev) | |
810da240 | 3384 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3385 | |
952fc18e TT |
3386 | sbi->s_overhead = overhead; |
3387 | smp_wmb(); | |
3388 | free_page((unsigned long) buf); | |
3389 | return 0; | |
3390 | } | |
3391 | ||
27dd4385 | 3392 | |
30fac0f7 | 3393 | static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3394 | { |
3395 | ext4_fsblk_t resv_clusters; | |
3396 | ||
30fac0f7 JK |
3397 | /* |
3398 | * There's no need to reserve anything when we aren't using extents. | |
3399 | * The space estimates are exact, there are no unwritten extents, | |
3400 | * hole punching doesn't need new metadata... This is needed especially | |
3401 | * to keep ext2/3 backward compatibility. | |
3402 | */ | |
3403 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) | |
3404 | return 0; | |
27dd4385 LC |
3405 | /* |
3406 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3407 | * This should cover the situations where we can not afford to run | |
3408 | * out of space like for example punch hole, or converting | |
556615dc | 3409 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3410 | * allocation would require 1, or 2 blocks, higher numbers are |
3411 | * very rare. | |
3412 | */ | |
30fac0f7 JK |
3413 | resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> |
3414 | EXT4_SB(sb)->s_cluster_bits; | |
27dd4385 LC |
3415 | |
3416 | do_div(resv_clusters, 50); | |
3417 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3418 | ||
3419 | return resv_clusters; | |
3420 | } | |
3421 | ||
3422 | ||
3423 | static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) | |
3424 | { | |
3425 | ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> | |
3426 | sbi->s_cluster_bits; | |
3427 | ||
3428 | if (count >= clusters) | |
3429 | return -EINVAL; | |
3430 | ||
3431 | atomic64_set(&sbi->s_resv_clusters, count); | |
3432 | return 0; | |
3433 | } | |
3434 | ||
2b2d6d01 | 3435 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3436 | { |
d4c402d9 | 3437 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3438 | struct buffer_head *bh; |
617ba13b MC |
3439 | struct ext4_super_block *es = NULL; |
3440 | struct ext4_sb_info *sbi; | |
3441 | ext4_fsblk_t block; | |
3442 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3443 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3444 | unsigned long offset = 0; |
ac27a0ec DK |
3445 | unsigned long journal_devnum = 0; |
3446 | unsigned long def_mount_opts; | |
3447 | struct inode *root; | |
9f6200bb | 3448 | char *cp; |
0390131b | 3449 | const char *descr; |
dcc7dae3 | 3450 | int ret = -ENOMEM; |
281b5995 | 3451 | int blocksize, clustersize; |
4ec11028 TT |
3452 | unsigned int db_count; |
3453 | unsigned int i; | |
281b5995 | 3454 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3455 | __u64 blocks_count; |
07aa2ea1 | 3456 | int err = 0; |
b3881f74 | 3457 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3458 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3459 | |
3460 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3461 | if (!sbi) | |
dcc7dae3 | 3462 | goto out_free_orig; |
705895b6 PE |
3463 | |
3464 | sbi->s_blockgroup_lock = | |
3465 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3466 | if (!sbi->s_blockgroup_lock) { | |
3467 | kfree(sbi); | |
dcc7dae3 | 3468 | goto out_free_orig; |
705895b6 | 3469 | } |
ac27a0ec | 3470 | sb->s_fs_info = sbi; |
2c0544b2 | 3471 | sbi->s_sb = sb; |
240799cd | 3472 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3473 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3474 | if (sb->s_bdev->bd_part) |
3475 | sbi->s_sectors_written_start = | |
3476 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3477 | |
9f6200bb TT |
3478 | /* Cleanup superblock name */ |
3479 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3480 | *cp = '!'; | |
3481 | ||
07aa2ea1 | 3482 | /* -EINVAL is default */ |
dcc7dae3 | 3483 | ret = -EINVAL; |
617ba13b | 3484 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3485 | if (!blocksize) { |
b31e1552 | 3486 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3487 | goto out_fail; |
3488 | } | |
3489 | ||
3490 | /* | |
617ba13b | 3491 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3492 | * block sizes. We need to calculate the offset from buffer start. |
3493 | */ | |
617ba13b | 3494 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3495 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3496 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3497 | } else { |
70bbb3e0 | 3498 | logical_sb_block = sb_block; |
ac27a0ec DK |
3499 | } |
3500 | ||
a8ac900b | 3501 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3502 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3503 | goto out_fail; |
3504 | } | |
3505 | /* | |
3506 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3507 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3508 | */ |
2716b802 | 3509 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3510 | sbi->s_es = es; |
3511 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3512 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3513 | goto cantfind_ext4; | |
afc32f7e | 3514 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3515 | |
feb0ab32 DW |
3516 | /* Warn if metadata_csum and gdt_csum are both set. */ |
3517 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3518 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
3519 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) | |
363307e6 | 3520 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3521 | "redundant flags; please run fsck."); |
3522 | ||
d25425f8 DW |
3523 | /* Check for a known checksum algorithm */ |
3524 | if (!ext4_verify_csum_type(sb, es)) { | |
3525 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3526 | "unknown checksum algorithm."); | |
3527 | silent = 1; | |
3528 | goto cantfind_ext4; | |
3529 | } | |
3530 | ||
0441984a DW |
3531 | /* Load the checksum driver */ |
3532 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3533 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3534 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
3535 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3536 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3537 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3538 | sbi->s_chksum_driver = NULL; | |
3539 | goto failed_mount; | |
3540 | } | |
3541 | } | |
3542 | ||
a9c47317 DW |
3543 | /* Check superblock checksum */ |
3544 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3545 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3546 | "invalid superblock checksum. Run e2fsck?"); | |
3547 | silent = 1; | |
3548 | goto cantfind_ext4; | |
3549 | } | |
3550 | ||
3551 | /* Precompute checksum seed for all metadata */ | |
9aa5d32b | 3552 | if (ext4_has_metadata_csum(sb)) |
a9c47317 DW |
3553 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3554 | sizeof(es->s_uuid)); | |
3555 | ||
ac27a0ec DK |
3556 | /* Set defaults before we parse the mount options */ |
3557 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3558 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3559 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3560 | set_opt(sb, DEBUG); |
87f26807 | 3561 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3562 | set_opt(sb, GRPID); |
617ba13b | 3563 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3564 | set_opt(sb, NO_UID32); |
ea663336 | 3565 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3566 | set_opt(sb, XATTR_USER); |
03010a33 | 3567 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3568 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3569 | #endif |
98c1a759 DW |
3570 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3571 | if (ext4_has_metadata_csum(sb)) | |
3572 | set_opt(sb, JOURNAL_CHECKSUM); | |
3573 | ||
617ba13b | 3574 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3575 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3576 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3577 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3578 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3579 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3580 | |
3581 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3582 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3583 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3584 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3585 | else |
fd8c37ec | 3586 | set_opt(sb, ERRORS_RO); |
45f1a9c3 DW |
3587 | /* block_validity enabled by default; disable with noblock_validity */ |
3588 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3589 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3590 | set_opt(sb, DISCARD); |
ac27a0ec | 3591 | |
08cefc7a EB |
3592 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3593 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3594 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3595 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3596 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3597 | |
8b67f04a | 3598 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3599 | set_opt(sb, BARRIER); |
ac27a0ec | 3600 | |
dd919b98 AK |
3601 | /* |
3602 | * enable delayed allocation by default | |
3603 | * Use -o nodelalloc to turn it off | |
3604 | */ | |
bc0b75f7 | 3605 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3606 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3607 | set_opt(sb, DELALLOC); |
dd919b98 | 3608 | |
51ce6511 LC |
3609 | /* |
3610 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3611 | * no mount option specified. | |
3612 | */ | |
3613 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3614 | ||
8b67f04a | 3615 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3616 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3617 | ext4_msg(sb, KERN_WARNING, |
3618 | "failed to parse options in superblock: %s", | |
3619 | sbi->s_es->s_mount_opts); | |
3620 | } | |
5a916be1 | 3621 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3622 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3623 | &journal_ioprio, 0)) |
ac27a0ec DK |
3624 | goto failed_mount; |
3625 | ||
56889787 TT |
3626 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3627 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3628 | "with data=journal disables delayed " | |
3629 | "allocation and O_DIRECT support!\n"); | |
3630 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3631 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3632 | "both data=journal and delalloc"); | |
3633 | goto failed_mount; | |
3634 | } | |
3635 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3636 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3637 | "both data=journal and dioread_nolock"); |
56889787 TT |
3638 | goto failed_mount; |
3639 | } | |
923ae0ff RZ |
3640 | if (test_opt(sb, DAX)) { |
3641 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3642 | "both data=journal and dax"); | |
3643 | goto failed_mount; | |
3644 | } | |
56889787 TT |
3645 | if (test_opt(sb, DELALLOC)) |
3646 | clear_opt(sb, DELALLOC); | |
3647 | } | |
3648 | ||
ac27a0ec | 3649 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3650 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3651 | |
617ba13b MC |
3652 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3653 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3654 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3655 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3656 | ext4_msg(sb, KERN_WARNING, |
3657 | "feature flags set on rev 0 fs, " | |
3658 | "running e2fsck is recommended"); | |
469108ff | 3659 | |
ed3654eb TT |
3660 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3661 | set_opt2(sb, HURD_COMPAT); | |
3662 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, | |
3663 | EXT4_FEATURE_INCOMPAT_64BIT)) { | |
3664 | ext4_msg(sb, KERN_ERR, | |
3665 | "The Hurd can't support 64-bit file systems"); | |
3666 | goto failed_mount; | |
3667 | } | |
3668 | } | |
3669 | ||
2035e776 TT |
3670 | if (IS_EXT2_SB(sb)) { |
3671 | if (ext2_feature_set_ok(sb)) | |
3672 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3673 | "using the ext4 subsystem"); | |
3674 | else { | |
3675 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3676 | "to feature incompatibilities"); | |
3677 | goto failed_mount; | |
3678 | } | |
3679 | } | |
3680 | ||
3681 | if (IS_EXT3_SB(sb)) { | |
3682 | if (ext3_feature_set_ok(sb)) | |
3683 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3684 | "using the ext4 subsystem"); | |
3685 | else { | |
3686 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3687 | "to feature incompatibilities"); | |
3688 | goto failed_mount; | |
3689 | } | |
3690 | } | |
3691 | ||
ac27a0ec DK |
3692 | /* |
3693 | * Check feature flags regardless of the revision level, since we | |
3694 | * previously didn't change the revision level when setting the flags, | |
3695 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3696 | */ | |
a13fb1a4 | 3697 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3698 | goto failed_mount; |
a13fb1a4 | 3699 | |
261cb20c | 3700 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3701 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3702 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3703 | ext4_msg(sb, KERN_ERR, |
3704 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3705 | goto failed_mount; |
3706 | } | |
3707 | ||
923ae0ff RZ |
3708 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
3709 | if (blocksize != PAGE_SIZE) { | |
3710 | ext4_msg(sb, KERN_ERR, | |
3711 | "error: unsupported blocksize for dax"); | |
3712 | goto failed_mount; | |
3713 | } | |
3714 | if (!sb->s_bdev->bd_disk->fops->direct_access) { | |
3715 | ext4_msg(sb, KERN_ERR, | |
3716 | "error: device does not support dax"); | |
3717 | goto failed_mount; | |
3718 | } | |
3719 | } | |
3720 | ||
6ddb2447 TT |
3721 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT) && |
3722 | es->s_encryption_level) { | |
3723 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", | |
3724 | es->s_encryption_level); | |
3725 | goto failed_mount; | |
3726 | } | |
3727 | ||
ac27a0ec | 3728 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3729 | /* Validate the filesystem blocksize */ |
3730 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3731 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3732 | blocksize); |
ac27a0ec DK |
3733 | goto failed_mount; |
3734 | } | |
3735 | ||
2b2d6d01 | 3736 | brelse(bh); |
70bbb3e0 AM |
3737 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3738 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3739 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3740 | if (!bh) { |
b31e1552 ES |
3741 | ext4_msg(sb, KERN_ERR, |
3742 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3743 | goto failed_mount; |
3744 | } | |
2716b802 | 3745 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3746 | sbi->s_es = es; |
617ba13b | 3747 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3748 | ext4_msg(sb, KERN_ERR, |
3749 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3750 | goto failed_mount; |
3751 | } | |
3752 | } | |
3753 | ||
a13fb1a4 ES |
3754 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3755 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3756 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3757 | has_huge_files); | |
3758 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3759 | |
617ba13b MC |
3760 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3761 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3762 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3763 | } else { |
3764 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3765 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3766 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3767 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3768 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3769 | ext4_msg(sb, KERN_ERR, |
3770 | "unsupported inode size: %d", | |
2b2d6d01 | 3771 | sbi->s_inode_size); |
ac27a0ec DK |
3772 | goto failed_mount; |
3773 | } | |
ef7f3835 KS |
3774 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3775 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3776 | } |
0b8e58a1 | 3777 | |
0d1ee42f AR |
3778 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3779 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3780 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3781 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3782 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3783 | ext4_msg(sb, KERN_ERR, |
3784 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3785 | sbi->s_desc_size); |
3786 | goto failed_mount; | |
3787 | } | |
3788 | } else | |
3789 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3790 | |
ac27a0ec | 3791 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3792 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3793 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3794 | goto cantfind_ext4; |
0b8e58a1 | 3795 | |
617ba13b | 3796 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3797 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3798 | goto cantfind_ext4; |
ac27a0ec DK |
3799 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3800 | sbi->s_inodes_per_block; | |
0d1ee42f | 3801 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3802 | sbi->s_sbh = bh; |
3803 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3804 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3805 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3806 | |
2b2d6d01 | 3807 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3808 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3809 | sbi->s_def_hash_version = es->s_def_hash_version; | |
23301410 TT |
3810 | if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { |
3811 | i = le32_to_cpu(es->s_flags); | |
3812 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3813 | sbi->s_hash_unsigned = 3; | |
3814 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3815 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3816 | if (!(sb->s_flags & MS_RDONLY)) |
3817 | es->s_flags |= | |
3818 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3819 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3820 | #else |
23301410 TT |
3821 | if (!(sb->s_flags & MS_RDONLY)) |
3822 | es->s_flags |= | |
3823 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3824 | #endif |
23301410 | 3825 | } |
f99b2589 | 3826 | } |
ac27a0ec | 3827 | |
281b5995 TT |
3828 | /* Handle clustersize */ |
3829 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3830 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3831 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3832 | if (has_bigalloc) { | |
3833 | if (clustersize < blocksize) { | |
3834 | ext4_msg(sb, KERN_ERR, | |
3835 | "cluster size (%d) smaller than " | |
3836 | "block size (%d)", clustersize, blocksize); | |
3837 | goto failed_mount; | |
3838 | } | |
3839 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3840 | le32_to_cpu(es->s_log_block_size); | |
3841 | sbi->s_clusters_per_group = | |
3842 | le32_to_cpu(es->s_clusters_per_group); | |
3843 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3844 | ext4_msg(sb, KERN_ERR, | |
3845 | "#clusters per group too big: %lu", | |
3846 | sbi->s_clusters_per_group); | |
3847 | goto failed_mount; | |
3848 | } | |
3849 | if (sbi->s_blocks_per_group != | |
3850 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3851 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3852 | "clusters per group (%lu) inconsistent", | |
3853 | sbi->s_blocks_per_group, | |
3854 | sbi->s_clusters_per_group); | |
3855 | goto failed_mount; | |
3856 | } | |
3857 | } else { | |
3858 | if (clustersize != blocksize) { | |
3859 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3860 | "block size (%d)", clustersize, | |
3861 | blocksize); | |
3862 | clustersize = blocksize; | |
3863 | } | |
3864 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3865 | ext4_msg(sb, KERN_ERR, | |
3866 | "#blocks per group too big: %lu", | |
3867 | sbi->s_blocks_per_group); | |
3868 | goto failed_mount; | |
3869 | } | |
3870 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3871 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3872 | } |
281b5995 TT |
3873 | sbi->s_cluster_ratio = clustersize / blocksize; |
3874 | ||
ac27a0ec | 3875 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3876 | ext4_msg(sb, KERN_ERR, |
3877 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3878 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3879 | goto failed_mount; |
3880 | } | |
3881 | ||
960fd856 TT |
3882 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3883 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3884 | set_opt2(sb, STD_GROUP_SIZE); | |
3885 | ||
bf43d84b ES |
3886 | /* |
3887 | * Test whether we have more sectors than will fit in sector_t, | |
3888 | * and whether the max offset is addressable by the page cache. | |
3889 | */ | |
5a9ae68a | 3890 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3891 | ext4_blocks_count(es)); |
5a9ae68a | 3892 | if (err) { |
b31e1552 | 3893 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3894 | " too large to mount safely on this system"); |
ac27a0ec | 3895 | if (sizeof(sector_t) < 8) |
90c699a9 | 3896 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3897 | goto failed_mount; |
3898 | } | |
3899 | ||
617ba13b MC |
3900 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3901 | goto cantfind_ext4; | |
e7c95593 | 3902 | |
0f2ddca6 FTN |
3903 | /* check blocks count against device size */ |
3904 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3905 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3906 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3907 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3908 | ext4_blocks_count(es), blocks_count); |
3909 | goto failed_mount; | |
3910 | } | |
3911 | ||
0b8e58a1 AD |
3912 | /* |
3913 | * It makes no sense for the first data block to be beyond the end | |
3914 | * of the filesystem. | |
3915 | */ | |
3916 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3917 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3918 | "block %u is beyond end of filesystem (%llu)", |
3919 | le32_to_cpu(es->s_first_data_block), | |
3920 | ext4_blocks_count(es)); | |
e7c95593 ES |
3921 | goto failed_mount; |
3922 | } | |
bd81d8ee LV |
3923 | blocks_count = (ext4_blocks_count(es) - |
3924 | le32_to_cpu(es->s_first_data_block) + | |
3925 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3926 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3927 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3928 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3929 | "(block count %llu, first data block %u, " |
b31e1552 | 3930 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3931 | ext4_blocks_count(es), |
3932 | le32_to_cpu(es->s_first_data_block), | |
3933 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3934 | goto failed_mount; | |
3935 | } | |
bd81d8ee | 3936 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3937 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3938 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3939 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3940 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3941 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3942 | sizeof(struct buffer_head *), | |
3943 | GFP_KERNEL); | |
ac27a0ec | 3944 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3945 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3946 | ret = -ENOMEM; |
ac27a0ec DK |
3947 | goto failed_mount; |
3948 | } | |
3949 | ||
9f6200bb TT |
3950 | if (ext4_proc_root) |
3951 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3952 | |
66acdcf4 TT |
3953 | if (sbi->s_proc) |
3954 | proc_create_data("options", S_IRUGO, sbi->s_proc, | |
3955 | &ext4_seq_options_fops, sb); | |
3956 | ||
705895b6 | 3957 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3958 | |
3959 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3960 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 3961 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 3962 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
3963 | ext4_msg(sb, KERN_ERR, |
3964 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3965 | db_count = i; |
3966 | goto failed_mount2; | |
3967 | } | |
3968 | } | |
bfff6873 | 3969 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3970 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
f9ae9cf5 | 3971 | goto failed_mount2; |
ac27a0ec | 3972 | } |
772cb7c8 | 3973 | |
f9ae9cf5 | 3974 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
3975 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
3976 | spin_lock_init(&sbi->s_next_gen_lock); | |
3977 | ||
04ecddb7 JM |
3978 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
3979 | (unsigned long) sb); | |
04496411 | 3980 | |
a75ae78f | 3981 | /* Register extent status tree shrinker */ |
eb68d0e2 | 3982 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 3983 | goto failed_mount3; |
ce7e010a | 3984 | |
c9de560d | 3985 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3986 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3987 | |
f9ae9cf5 TT |
3988 | /* |
3989 | * set up enough so that it can read an inode | |
3990 | */ | |
f6e63f90 | 3991 | sb->s_op = &ext4_sops; |
617ba13b MC |
3992 | sb->s_export_op = &ext4_export_ops; |
3993 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3994 | #ifdef CONFIG_QUOTA |
617ba13b | 3995 | sb->dq_op = &ext4_quota_operations; |
262b4662 | 3996 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) |
1fa5efe3 | 3997 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
3998 | else |
3999 | sb->s_qcop = &ext4_qctl_operations; | |
96c7e0d9 | 4000 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
ac27a0ec | 4001 | #endif |
f2fa2ffc AK |
4002 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
4003 | ||
ac27a0ec | 4004 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 4005 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
4006 | |
4007 | sb->s_root = NULL; | |
4008 | ||
4009 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
4010 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
4011 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 4012 | |
c5e06d10 JL |
4013 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
4014 | !(sb->s_flags & MS_RDONLY)) | |
4015 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
50460fe8 | 4016 | goto failed_mount3a; |
c5e06d10 | 4017 | |
ac27a0ec DK |
4018 | /* |
4019 | * The first inode we look at is the journal inode. Don't try | |
4020 | * root first: it may be modified in the journal! | |
4021 | */ | |
4022 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
4023 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4024 | if (ext4_load_journal(sb, es, journal_devnum)) | |
50460fe8 | 4025 | goto failed_mount3a; |
0390131b FM |
4026 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
4027 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
4028 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
4029 | "suppressed and not mounted read-only"); | |
744692dc | 4030 | goto failed_mount_wq; |
ac27a0ec | 4031 | } else { |
fd8c37ec | 4032 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
4033 | sbi->s_journal = NULL; |
4034 | needs_recovery = 0; | |
4035 | goto no_journal; | |
ac27a0ec DK |
4036 | } |
4037 | ||
f32aaf2d | 4038 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
eb40a09c JS |
4039 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
4040 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 4041 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 4042 | goto failed_mount_wq; |
eb40a09c JS |
4043 | } |
4044 | ||
25ed6e8a DW |
4045 | if (!set_journal_csum_feature_set(sb)) { |
4046 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
4047 | "feature set"); | |
4048 | goto failed_mount_wq; | |
d4da6c9c | 4049 | } |
818d276c | 4050 | |
ac27a0ec DK |
4051 | /* We have now updated the journal if required, so we can |
4052 | * validate the data journaling mode. */ | |
4053 | switch (test_opt(sb, DATA_FLAGS)) { | |
4054 | case 0: | |
4055 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
4056 | * capabilities: ORDERED_DATA if the journal can |
4057 | * cope, else JOURNAL_DATA | |
4058 | */ | |
dab291af MC |
4059 | if (jbd2_journal_check_available_features |
4060 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 4061 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 4062 | else |
fd8c37ec | 4063 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
4064 | break; |
4065 | ||
617ba13b MC |
4066 | case EXT4_MOUNT_ORDERED_DATA: |
4067 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
4068 | if (!jbd2_journal_check_available_features |
4069 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
4070 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
4071 | "requested data journaling mode"); | |
744692dc | 4072 | goto failed_mount_wq; |
ac27a0ec DK |
4073 | } |
4074 | default: | |
4075 | break; | |
4076 | } | |
b3881f74 | 4077 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 4078 | |
18aadd47 BJ |
4079 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
4080 | ||
ce7e010a | 4081 | no_journal: |
9c191f70 M |
4082 | if (ext4_mballoc_ready) { |
4083 | sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); | |
4084 | if (!sbi->s_mb_cache) { | |
4085 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); | |
4086 | goto failed_mount_wq; | |
4087 | } | |
4088 | } | |
4089 | ||
1cb767cd TT |
4090 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || |
4091 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) && | |
4092 | (blocksize != PAGE_CACHE_SIZE)) { | |
4093 | ext4_msg(sb, KERN_ERR, | |
4094 | "Unsupported blocksize for fs encryption"); | |
4095 | goto failed_mount_wq; | |
4096 | } | |
4097 | ||
4098 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && | |
6ddb2447 TT |
4099 | !(sb->s_flags & MS_RDONLY) && |
4100 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) { | |
4101 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT); | |
4102 | ext4_commit_super(sb, 1); | |
4103 | } | |
4104 | ||
952fc18e TT |
4105 | /* |
4106 | * Get the # of file system overhead blocks from the | |
4107 | * superblock if present. | |
4108 | */ | |
4109 | if (es->s_overhead_clusters) | |
4110 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
4111 | else { | |
07aa2ea1 LC |
4112 | err = ext4_calculate_overhead(sb); |
4113 | if (err) | |
952fc18e TT |
4114 | goto failed_mount_wq; |
4115 | } | |
4116 | ||
fd89d5f2 TH |
4117 | /* |
4118 | * The maximum number of concurrent works can be high and | |
4119 | * concurrency isn't really necessary. Limit it to 1. | |
4120 | */ | |
2e8fa54e JK |
4121 | EXT4_SB(sb)->rsv_conversion_wq = |
4122 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
4123 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
4124 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 4125 | ret = -ENOMEM; |
2e8fa54e JK |
4126 | goto failed_mount4; |
4127 | } | |
4128 | ||
ac27a0ec | 4129 | /* |
dab291af | 4130 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
4131 | * so we can safely mount the rest of the filesystem now. |
4132 | */ | |
4133 | ||
1d1fe1ee DH |
4134 | root = ext4_iget(sb, EXT4_ROOT_INO); |
4135 | if (IS_ERR(root)) { | |
b31e1552 | 4136 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 4137 | ret = PTR_ERR(root); |
32a9bb57 | 4138 | root = NULL; |
ac27a0ec DK |
4139 | goto failed_mount4; |
4140 | } | |
4141 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4142 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4143 | iput(root); |
ac27a0ec DK |
4144 | goto failed_mount4; |
4145 | } | |
48fde701 | 4146 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4147 | if (!sb->s_root) { |
b31e1552 | 4148 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4149 | ret = -ENOMEM; |
4150 | goto failed_mount4; | |
4151 | } | |
ac27a0ec | 4152 | |
7e84b621 ES |
4153 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
4154 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
4155 | |
4156 | /* determine the minimum size of new large inodes, if present */ | |
4157 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
4158 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4159 | EXT4_GOOD_OLD_INODE_SIZE; | |
4160 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4161 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
4162 | if (sbi->s_want_extra_isize < | |
4163 | le16_to_cpu(es->s_want_extra_isize)) | |
4164 | sbi->s_want_extra_isize = | |
4165 | le16_to_cpu(es->s_want_extra_isize); | |
4166 | if (sbi->s_want_extra_isize < | |
4167 | le16_to_cpu(es->s_min_extra_isize)) | |
4168 | sbi->s_want_extra_isize = | |
4169 | le16_to_cpu(es->s_min_extra_isize); | |
4170 | } | |
4171 | } | |
4172 | /* Check if enough inode space is available */ | |
4173 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
4174 | sbi->s_inode_size) { | |
4175 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4176 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
4177 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
4178 | "available"); | |
ef7f3835 KS |
4179 | } |
4180 | ||
30fac0f7 | 4181 | err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); |
27dd4385 LC |
4182 | if (err) { |
4183 | ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " | |
30fac0f7 | 4184 | "reserved pool", ext4_calculate_resv_clusters(sb)); |
f9ae9cf5 | 4185 | goto failed_mount4a; |
27dd4385 LC |
4186 | } |
4187 | ||
6fd058f7 TT |
4188 | err = ext4_setup_system_zone(sb); |
4189 | if (err) { | |
b31e1552 | 4190 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4191 | "zone (%d)", err); |
f9ae9cf5 TT |
4192 | goto failed_mount4a; |
4193 | } | |
4194 | ||
4195 | ext4_ext_init(sb); | |
4196 | err = ext4_mb_init(sb); | |
4197 | if (err) { | |
4198 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
4199 | err); | |
dcf2d804 | 4200 | goto failed_mount5; |
c2774d84 AK |
4201 | } |
4202 | ||
d5e03cbb TT |
4203 | block = ext4_count_free_clusters(sb); |
4204 | ext4_free_blocks_count_set(sbi->s_es, | |
4205 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
4206 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
4207 | GFP_KERNEL); | |
d5e03cbb TT |
4208 | if (!err) { |
4209 | unsigned long freei = ext4_count_free_inodes(sb); | |
4210 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
4211 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
4212 | GFP_KERNEL); | |
d5e03cbb TT |
4213 | } |
4214 | if (!err) | |
4215 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 4216 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 4217 | if (!err) |
908c7f19 TH |
4218 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
4219 | GFP_KERNEL); | |
d5e03cbb TT |
4220 | if (err) { |
4221 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
4222 | goto failed_mount6; | |
4223 | } | |
4224 | ||
4225 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) | |
4226 | if (!ext4_fill_flex_info(sb)) { | |
4227 | ext4_msg(sb, KERN_ERR, | |
4228 | "unable to initialize " | |
4229 | "flex_bg meta info!"); | |
4230 | goto failed_mount6; | |
4231 | } | |
4232 | ||
bfff6873 LC |
4233 | err = ext4_register_li_request(sb, first_not_zeroed); |
4234 | if (err) | |
dcf2d804 | 4235 | goto failed_mount6; |
bfff6873 | 4236 | |
3197ebdb TT |
4237 | sbi->s_kobj.kset = ext4_kset; |
4238 | init_completion(&sbi->s_kobj_unregister); | |
4239 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
4240 | "%s", sb->s_id); | |
dcf2d804 TM |
4241 | if (err) |
4242 | goto failed_mount7; | |
3197ebdb | 4243 | |
9b2ff357 JK |
4244 | #ifdef CONFIG_QUOTA |
4245 | /* Enable quota usage during mount. */ | |
4246 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
4247 | !(sb->s_flags & MS_RDONLY)) { | |
4248 | err = ext4_enable_quotas(sb); | |
4249 | if (err) | |
4250 | goto failed_mount8; | |
4251 | } | |
4252 | #endif /* CONFIG_QUOTA */ | |
4253 | ||
617ba13b MC |
4254 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4255 | ext4_orphan_cleanup(sb, es); | |
4256 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4257 | if (needs_recovery) { |
b31e1552 | 4258 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4259 | ext4_mark_recovery_complete(sb, es); |
4260 | } | |
4261 | if (EXT4_SB(sb)->s_journal) { | |
4262 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4263 | descr = " journalled data mode"; | |
4264 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4265 | descr = " ordered data mode"; | |
4266 | else | |
4267 | descr = " writeback data mode"; | |
4268 | } else | |
4269 | descr = "out journal"; | |
4270 | ||
79add3a3 LC |
4271 | if (test_opt(sb, DISCARD)) { |
4272 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4273 | if (!blk_queue_discard(q)) | |
4274 | ext4_msg(sb, KERN_WARNING, | |
4275 | "mounting with \"discard\" option, but " | |
4276 | "the device does not support discard"); | |
4277 | } | |
4278 | ||
d4c402d9 | 4279 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
4280 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
4281 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4282 | |
66e61a9e TT |
4283 | if (es->s_error_count) |
4284 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4285 | |
efbed4dc TT |
4286 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
4287 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
4288 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
4289 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
4290 | ||
d4c402d9 | 4291 | kfree(orig_data); |
ac27a0ec DK |
4292 | return 0; |
4293 | ||
617ba13b | 4294 | cantfind_ext4: |
ac27a0ec | 4295 | if (!silent) |
b31e1552 | 4296 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4297 | goto failed_mount; |
4298 | ||
72ba7450 TT |
4299 | #ifdef CONFIG_QUOTA |
4300 | failed_mount8: | |
4301 | kobject_del(&sbi->s_kobj); | |
4302 | #endif | |
dcf2d804 TM |
4303 | failed_mount7: |
4304 | ext4_unregister_li_request(sb); | |
4305 | failed_mount6: | |
f9ae9cf5 | 4306 | ext4_mb_release(sb); |
d5e03cbb | 4307 | if (sbi->s_flex_groups) |
b93b41d4 | 4308 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4309 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4310 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4311 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4312 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4313 | failed_mount5: |
f9ae9cf5 TT |
4314 | ext4_ext_release(sb); |
4315 | ext4_release_system_zone(sb); | |
4316 | failed_mount4a: | |
94bf608a | 4317 | dput(sb->s_root); |
32a9bb57 | 4318 | sb->s_root = NULL; |
94bf608a | 4319 | failed_mount4: |
b31e1552 | 4320 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4321 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4322 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4323 | failed_mount_wq: |
0390131b FM |
4324 | if (sbi->s_journal) { |
4325 | jbd2_journal_destroy(sbi->s_journal); | |
4326 | sbi->s_journal = NULL; | |
4327 | } | |
50460fe8 | 4328 | failed_mount3a: |
d3922a77 | 4329 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4330 | failed_mount3: |
9105bb14 | 4331 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4332 | if (sbi->s_mmp_tsk) |
4333 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4334 | failed_mount2: |
4335 | for (i = 0; i < db_count; i++) | |
4336 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4337 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4338 | failed_mount: |
0441984a DW |
4339 | if (sbi->s_chksum_driver) |
4340 | crypto_free_shash(sbi->s_chksum_driver); | |
240799cd | 4341 | if (sbi->s_proc) { |
66acdcf4 | 4342 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 4343 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 4344 | } |
ac27a0ec | 4345 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4346 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4347 | kfree(sbi->s_qf_names[i]); |
4348 | #endif | |
617ba13b | 4349 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4350 | brelse(bh); |
4351 | out_fail: | |
4352 | sb->s_fs_info = NULL; | |
f6830165 | 4353 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4354 | kfree(sbi); |
dcc7dae3 | 4355 | out_free_orig: |
d4c402d9 | 4356 | kfree(orig_data); |
07aa2ea1 | 4357 | return err ? err : ret; |
ac27a0ec DK |
4358 | } |
4359 | ||
4360 | /* | |
4361 | * Setup any per-fs journal parameters now. We'll do this both on | |
4362 | * initial mount, once the journal has been initialised but before we've | |
4363 | * done any recovery; and again on any subsequent remount. | |
4364 | */ | |
617ba13b | 4365 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4366 | { |
617ba13b | 4367 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4368 | |
30773840 TT |
4369 | journal->j_commit_interval = sbi->s_commit_interval; |
4370 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4371 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4372 | |
a931da6a | 4373 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4374 | if (test_opt(sb, BARRIER)) |
dab291af | 4375 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4376 | else |
dab291af | 4377 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4378 | if (test_opt(sb, DATA_ERR_ABORT)) |
4379 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4380 | else | |
4381 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4382 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4383 | } |
4384 | ||
617ba13b | 4385 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4386 | unsigned int journal_inum) |
4387 | { | |
4388 | struct inode *journal_inode; | |
4389 | journal_t *journal; | |
4390 | ||
0390131b FM |
4391 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4392 | ||
ac27a0ec DK |
4393 | /* First, test for the existence of a valid inode on disk. Bad |
4394 | * things happen if we iget() an unused inode, as the subsequent | |
4395 | * iput() will try to delete it. */ | |
4396 | ||
1d1fe1ee DH |
4397 | journal_inode = ext4_iget(sb, journal_inum); |
4398 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4399 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4400 | return NULL; |
4401 | } | |
4402 | if (!journal_inode->i_nlink) { | |
4403 | make_bad_inode(journal_inode); | |
4404 | iput(journal_inode); | |
b31e1552 | 4405 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4406 | return NULL; |
4407 | } | |
4408 | ||
e5f8eab8 | 4409 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4410 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4411 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4412 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4413 | iput(journal_inode); |
4414 | return NULL; | |
4415 | } | |
4416 | ||
dab291af | 4417 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4418 | if (!journal) { |
b31e1552 | 4419 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4420 | iput(journal_inode); |
4421 | return NULL; | |
4422 | } | |
4423 | journal->j_private = sb; | |
617ba13b | 4424 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4425 | return journal; |
4426 | } | |
4427 | ||
617ba13b | 4428 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4429 | dev_t j_dev) |
4430 | { | |
2b2d6d01 | 4431 | struct buffer_head *bh; |
ac27a0ec | 4432 | journal_t *journal; |
617ba13b MC |
4433 | ext4_fsblk_t start; |
4434 | ext4_fsblk_t len; | |
ac27a0ec | 4435 | int hblock, blocksize; |
617ba13b | 4436 | ext4_fsblk_t sb_block; |
ac27a0ec | 4437 | unsigned long offset; |
2b2d6d01 | 4438 | struct ext4_super_block *es; |
ac27a0ec DK |
4439 | struct block_device *bdev; |
4440 | ||
0390131b FM |
4441 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4442 | ||
b31e1552 | 4443 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4444 | if (bdev == NULL) |
4445 | return NULL; | |
4446 | ||
ac27a0ec | 4447 | blocksize = sb->s_blocksize; |
e1defc4f | 4448 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4449 | if (blocksize < hblock) { |
b31e1552 ES |
4450 | ext4_msg(sb, KERN_ERR, |
4451 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4452 | goto out_bdev; |
4453 | } | |
4454 | ||
617ba13b MC |
4455 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4456 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4457 | set_blocksize(bdev, blocksize); |
4458 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4459 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4460 | "external journal"); | |
ac27a0ec DK |
4461 | goto out_bdev; |
4462 | } | |
4463 | ||
2716b802 | 4464 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4465 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4466 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4467 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4468 | ext4_msg(sb, KERN_ERR, "external journal has " |
4469 | "bad superblock"); | |
ac27a0ec DK |
4470 | brelse(bh); |
4471 | goto out_bdev; | |
4472 | } | |
4473 | ||
df4763be DW |
4474 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4475 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4476 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4477 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4478 | "corrupt superblock"); | |
4479 | brelse(bh); | |
4480 | goto out_bdev; | |
4481 | } | |
4482 | ||
617ba13b | 4483 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4484 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4485 | brelse(bh); |
4486 | goto out_bdev; | |
4487 | } | |
4488 | ||
bd81d8ee | 4489 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4490 | start = sb_block + 1; |
4491 | brelse(bh); /* we're done with the superblock */ | |
4492 | ||
dab291af | 4493 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4494 | start, len, blocksize); |
4495 | if (!journal) { | |
b31e1552 | 4496 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4497 | goto out_bdev; |
4498 | } | |
4499 | journal->j_private = sb; | |
9f203507 | 4500 | ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4501 | wait_on_buffer(journal->j_sb_buffer); |
4502 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4503 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4504 | goto out_journal; |
4505 | } | |
4506 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4507 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4508 | "user (unsupported) - %d", | |
ac27a0ec DK |
4509 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4510 | goto out_journal; | |
4511 | } | |
617ba13b MC |
4512 | EXT4_SB(sb)->journal_bdev = bdev; |
4513 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4514 | return journal; |
0b8e58a1 | 4515 | |
ac27a0ec | 4516 | out_journal: |
dab291af | 4517 | jbd2_journal_destroy(journal); |
ac27a0ec | 4518 | out_bdev: |
617ba13b | 4519 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4520 | return NULL; |
4521 | } | |
4522 | ||
617ba13b MC |
4523 | static int ext4_load_journal(struct super_block *sb, |
4524 | struct ext4_super_block *es, | |
ac27a0ec DK |
4525 | unsigned long journal_devnum) |
4526 | { | |
4527 | journal_t *journal; | |
4528 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4529 | dev_t journal_dev; | |
4530 | int err = 0; | |
4531 | int really_read_only; | |
4532 | ||
0390131b FM |
4533 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4534 | ||
ac27a0ec DK |
4535 | if (journal_devnum && |
4536 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4537 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4538 | "numbers have changed"); | |
ac27a0ec DK |
4539 | journal_dev = new_decode_dev(journal_devnum); |
4540 | } else | |
4541 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4542 | ||
4543 | really_read_only = bdev_read_only(sb->s_bdev); | |
4544 | ||
4545 | /* | |
4546 | * Are we loading a blank journal or performing recovery after a | |
4547 | * crash? For recovery, we need to check in advance whether we | |
4548 | * can get read-write access to the device. | |
4549 | */ | |
617ba13b | 4550 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4551 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4552 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4553 | "required on readonly filesystem"); | |
ac27a0ec | 4554 | if (really_read_only) { |
b31e1552 ES |
4555 | ext4_msg(sb, KERN_ERR, "write access " |
4556 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4557 | return -EROFS; |
4558 | } | |
b31e1552 ES |
4559 | ext4_msg(sb, KERN_INFO, "write access will " |
4560 | "be enabled during recovery"); | |
ac27a0ec DK |
4561 | } |
4562 | } | |
4563 | ||
4564 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4565 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4566 | "and inode journals!"); | |
ac27a0ec DK |
4567 | return -EINVAL; |
4568 | } | |
4569 | ||
4570 | if (journal_inum) { | |
617ba13b | 4571 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4572 | return -EINVAL; |
4573 | } else { | |
617ba13b | 4574 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4575 | return -EINVAL; |
4576 | } | |
4577 | ||
90576c0b | 4578 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4579 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4580 | |
617ba13b | 4581 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4582 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4583 | if (!err) { |
4584 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4585 | if (save) | |
4586 | memcpy(save, ((char *) es) + | |
4587 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4588 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4589 | if (save) |
4590 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4591 | save, EXT4_S_ERR_LEN); | |
4592 | kfree(save); | |
4593 | } | |
ac27a0ec DK |
4594 | |
4595 | if (err) { | |
b31e1552 | 4596 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4597 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4598 | return err; |
4599 | } | |
4600 | ||
617ba13b MC |
4601 | EXT4_SB(sb)->s_journal = journal; |
4602 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4603 | |
c41303ce | 4604 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4605 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4606 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4607 | |
4608 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4609 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4610 | } |
4611 | ||
4612 | return 0; | |
4613 | } | |
4614 | ||
e2d67052 | 4615 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4616 | { |
e2d67052 | 4617 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4618 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4619 | int error = 0; |
ac27a0ec | 4620 | |
08439fec | 4621 | if (!sbh) |
c4be0c1d | 4622 | return error; |
914258bf TT |
4623 | if (buffer_write_io_error(sbh)) { |
4624 | /* | |
4625 | * Oh, dear. A previous attempt to write the | |
4626 | * superblock failed. This could happen because the | |
4627 | * USB device was yanked out. Or it could happen to | |
4628 | * be a transient write error and maybe the block will | |
4629 | * be remapped. Nothing we can do but to retry the | |
4630 | * write and hope for the best. | |
4631 | */ | |
b31e1552 ES |
4632 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4633 | "superblock detected"); | |
914258bf TT |
4634 | clear_buffer_write_io_error(sbh); |
4635 | set_buffer_uptodate(sbh); | |
4636 | } | |
71290b36 TT |
4637 | /* |
4638 | * If the file system is mounted read-only, don't update the | |
4639 | * superblock write time. This avoids updating the superblock | |
4640 | * write time when we are mounting the root file system | |
4641 | * read/only but we need to replay the journal; at that point, | |
4642 | * for people who are east of GMT and who make their clock | |
4643 | * tick in localtime for Windows bug-for-bug compatibility, | |
4644 | * the clock is set in the future, and this will cause e2fsck | |
4645 | * to complain and force a full file system check. | |
4646 | */ | |
4647 | if (!(sb->s_flags & MS_RDONLY)) | |
4648 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4649 | if (sb->s_bdev->bd_part) |
4650 | es->s_kbytes_written = | |
4651 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4652 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4653 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4654 | else |
4655 | es->s_kbytes_written = | |
4656 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4657 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4658 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4659 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4660 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4661 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4662 | es->s_free_inodes_count = | |
4663 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4664 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4665 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4666 | ext4_superblock_csum_set(sb); |
ac27a0ec | 4667 | mark_buffer_dirty(sbh); |
914258bf | 4668 | if (sync) { |
c4be0c1d TS |
4669 | error = sync_dirty_buffer(sbh); |
4670 | if (error) | |
4671 | return error; | |
4672 | ||
4673 | error = buffer_write_io_error(sbh); | |
4674 | if (error) { | |
b31e1552 ES |
4675 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4676 | "superblock"); | |
914258bf TT |
4677 | clear_buffer_write_io_error(sbh); |
4678 | set_buffer_uptodate(sbh); | |
4679 | } | |
4680 | } | |
c4be0c1d | 4681 | return error; |
ac27a0ec DK |
4682 | } |
4683 | ||
ac27a0ec DK |
4684 | /* |
4685 | * Have we just finished recovery? If so, and if we are mounting (or | |
4686 | * remounting) the filesystem readonly, then we will end up with a | |
4687 | * consistent fs on disk. Record that fact. | |
4688 | */ | |
2b2d6d01 TT |
4689 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4690 | struct ext4_super_block *es) | |
ac27a0ec | 4691 | { |
617ba13b | 4692 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4693 | |
0390131b FM |
4694 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4695 | BUG_ON(journal != NULL); | |
4696 | return; | |
4697 | } | |
dab291af | 4698 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4699 | if (jbd2_journal_flush(journal) < 0) |
4700 | goto out; | |
4701 | ||
617ba13b | 4702 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4703 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4704 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4705 | ext4_commit_super(sb, 1); |
ac27a0ec | 4706 | } |
7ffe1ea8 HK |
4707 | |
4708 | out: | |
dab291af | 4709 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4710 | } |
4711 | ||
4712 | /* | |
4713 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4714 | * has recorded an error from a previous lifetime, move that error to the | |
4715 | * main filesystem now. | |
4716 | */ | |
2b2d6d01 TT |
4717 | static void ext4_clear_journal_err(struct super_block *sb, |
4718 | struct ext4_super_block *es) | |
ac27a0ec DK |
4719 | { |
4720 | journal_t *journal; | |
4721 | int j_errno; | |
4722 | const char *errstr; | |
4723 | ||
0390131b FM |
4724 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4725 | ||
617ba13b | 4726 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4727 | |
4728 | /* | |
4729 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4730 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4731 | */ |
4732 | ||
dab291af | 4733 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4734 | if (j_errno) { |
4735 | char nbuf[16]; | |
4736 | ||
617ba13b | 4737 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4738 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4739 | "from previous mount: %s", errstr); |
12062ddd | 4740 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4741 | |
617ba13b MC |
4742 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4743 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4744 | ext4_commit_super(sb, 1); |
ac27a0ec | 4745 | |
dab291af | 4746 | jbd2_journal_clear_err(journal); |
d796c52e | 4747 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4748 | } |
4749 | } | |
4750 | ||
4751 | /* | |
4752 | * Force the running and committing transactions to commit, | |
4753 | * and wait on the commit. | |
4754 | */ | |
617ba13b | 4755 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4756 | { |
4757 | journal_t *journal; | |
ac27a0ec DK |
4758 | |
4759 | if (sb->s_flags & MS_RDONLY) | |
4760 | return 0; | |
4761 | ||
617ba13b | 4762 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4763 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4764 | } |
4765 | ||
617ba13b | 4766 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4767 | { |
14ce0cb4 | 4768 | int ret = 0; |
9eddacf9 | 4769 | tid_t target; |
06a407f1 | 4770 | bool needs_barrier = false; |
8d5d02e6 | 4771 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4772 | |
9bffad1e | 4773 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4774 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4775 | /* |
4776 | * Writeback quota in non-journalled quota case - journalled quota has | |
4777 | * no dirty dquots | |
4778 | */ | |
4779 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4780 | /* |
4781 | * Data writeback is possible w/o journal transaction, so barrier must | |
4782 | * being sent at the end of the function. But we can skip it if | |
4783 | * transaction_commit will do it for us. | |
4784 | */ | |
bda32530 TT |
4785 | if (sbi->s_journal) { |
4786 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4787 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4788 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4789 | needs_barrier = true; | |
4790 | ||
4791 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4792 | if (wait) | |
4793 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4794 | target); | |
4795 | } | |
4796 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4797 | needs_barrier = true; |
06a407f1 DM |
4798 | if (needs_barrier) { |
4799 | int err; | |
4800 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4801 | if (!ret) | |
4802 | ret = err; | |
0390131b | 4803 | } |
06a407f1 DM |
4804 | |
4805 | return ret; | |
4806 | } | |
4807 | ||
ac27a0ec DK |
4808 | /* |
4809 | * LVM calls this function before a (read-only) snapshot is created. This | |
4810 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4811 | * |
4812 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4813 | * state independently. It relies on upper layer to stop all data & metadata |
4814 | * modifications. | |
ac27a0ec | 4815 | */ |
c4be0c1d | 4816 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4817 | { |
c4be0c1d TS |
4818 | int error = 0; |
4819 | journal_t *journal; | |
ac27a0ec | 4820 | |
9ca92389 TT |
4821 | if (sb->s_flags & MS_RDONLY) |
4822 | return 0; | |
ac27a0ec | 4823 | |
9ca92389 | 4824 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4825 | |
bb044576 TT |
4826 | if (journal) { |
4827 | /* Now we set up the journal barrier. */ | |
4828 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4829 | |
bb044576 TT |
4830 | /* |
4831 | * Don't clear the needs_recovery flag if we failed to | |
4832 | * flush the journal. | |
4833 | */ | |
4834 | error = jbd2_journal_flush(journal); | |
4835 | if (error < 0) | |
4836 | goto out; | |
4837 | } | |
9ca92389 TT |
4838 | |
4839 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4840 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4841 | error = ext4_commit_super(sb, 1); | |
6b0310fb | 4842 | out: |
bb044576 TT |
4843 | if (journal) |
4844 | /* we rely on upper layer to stop further updates */ | |
4845 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4846 | return error; |
ac27a0ec DK |
4847 | } |
4848 | ||
4849 | /* | |
4850 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4851 | * flag here, even though the filesystem is not technically dirty yet. | |
4852 | */ | |
c4be0c1d | 4853 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4854 | { |
9ca92389 TT |
4855 | if (sb->s_flags & MS_RDONLY) |
4856 | return 0; | |
4857 | ||
9ca92389 TT |
4858 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
4859 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4860 | ext4_commit_super(sb, 1); | |
c4be0c1d | 4861 | return 0; |
ac27a0ec DK |
4862 | } |
4863 | ||
673c6100 TT |
4864 | /* |
4865 | * Structure to save mount options for ext4_remount's benefit | |
4866 | */ | |
4867 | struct ext4_mount_options { | |
4868 | unsigned long s_mount_opt; | |
a2595b8a | 4869 | unsigned long s_mount_opt2; |
08cefc7a EB |
4870 | kuid_t s_resuid; |
4871 | kgid_t s_resgid; | |
673c6100 TT |
4872 | unsigned long s_commit_interval; |
4873 | u32 s_min_batch_time, s_max_batch_time; | |
4874 | #ifdef CONFIG_QUOTA | |
4875 | int s_jquota_fmt; | |
a2d4a646 | 4876 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4877 | #endif |
4878 | }; | |
4879 | ||
2b2d6d01 | 4880 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4881 | { |
2b2d6d01 | 4882 | struct ext4_super_block *es; |
617ba13b | 4883 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4884 | unsigned long old_sb_flags; |
617ba13b | 4885 | struct ext4_mount_options old_opts; |
c79d967d | 4886 | int enable_quota = 0; |
8a266467 | 4887 | ext4_group_t g; |
b3881f74 | 4888 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4889 | int err = 0; |
ac27a0ec | 4890 | #ifdef CONFIG_QUOTA |
03dafb5f | 4891 | int i, j; |
ac27a0ec | 4892 | #endif |
d4c402d9 | 4893 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4894 | |
4895 | /* Store the original options */ | |
4896 | old_sb_flags = sb->s_flags; | |
4897 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4898 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4899 | old_opts.s_resuid = sbi->s_resuid; |
4900 | old_opts.s_resgid = sbi->s_resgid; | |
4901 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4902 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4903 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4904 | #ifdef CONFIG_QUOTA |
4905 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 4906 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
4907 | if (sbi->s_qf_names[i]) { |
4908 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4909 | GFP_KERNEL); | |
4910 | if (!old_opts.s_qf_names[i]) { | |
4911 | for (j = 0; j < i; j++) | |
4912 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4913 | kfree(orig_data); |
03dafb5f CG |
4914 | return -ENOMEM; |
4915 | } | |
4916 | } else | |
4917 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4918 | #endif |
b3881f74 TT |
4919 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4920 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 4921 | |
661aa520 | 4922 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4923 | err = -EINVAL; |
4924 | goto restore_opts; | |
4925 | } | |
4926 | ||
6b992ff2 | 4927 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
4928 | test_opt(sb, JOURNAL_CHECKSUM)) { |
4929 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
4930 | "during remount not supported; ignoring"); |
4931 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
4932 | } |
4933 | ||
6ae6514b PS |
4934 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4935 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4936 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4937 | "both data=journal and delalloc"); | |
4938 | err = -EINVAL; | |
4939 | goto restore_opts; | |
4940 | } | |
4941 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4942 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4943 | "both data=journal and dioread_nolock"); | |
4944 | err = -EINVAL; | |
4945 | goto restore_opts; | |
4946 | } | |
923ae0ff RZ |
4947 | if (test_opt(sb, DAX)) { |
4948 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4949 | "both data=journal and dax"); | |
4950 | err = -EINVAL; | |
4951 | goto restore_opts; | |
4952 | } | |
4953 | } | |
4954 | ||
4955 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { | |
4956 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
4957 | "dax flag with busy inodes while remounting"); | |
4958 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
4959 | } |
4960 | ||
4ab2f15b | 4961 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4962 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4963 | |
4964 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4965 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4966 | |
4967 | es = sbi->s_es; | |
4968 | ||
b3881f74 | 4969 | if (sbi->s_journal) { |
0390131b | 4970 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4971 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4972 | } | |
ac27a0ec | 4973 | |
661aa520 | 4974 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4975 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4976 | err = -EROFS; |
4977 | goto restore_opts; | |
4978 | } | |
4979 | ||
4980 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
4981 | err = sync_filesystem(sb); |
4982 | if (err < 0) | |
4983 | goto restore_opts; | |
0f0dd62f CH |
4984 | err = dquot_suspend(sb, -1); |
4985 | if (err < 0) | |
c79d967d | 4986 | goto restore_opts; |
c79d967d | 4987 | |
ac27a0ec DK |
4988 | /* |
4989 | * First of all, the unconditional stuff we have to do | |
4990 | * to disable replay of the journal when we next remount | |
4991 | */ | |
4992 | sb->s_flags |= MS_RDONLY; | |
4993 | ||
4994 | /* | |
4995 | * OK, test if we are remounting a valid rw partition | |
4996 | * readonly, and if so set the rdonly flag and then | |
4997 | * mark the partition as valid again. | |
4998 | */ | |
617ba13b MC |
4999 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
5000 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
5001 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
5002 | ||
a63c9eb2 | 5003 | if (sbi->s_journal) |
0390131b | 5004 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 5005 | } else { |
a13fb1a4 | 5006 | /* Make sure we can mount this feature set readwrite */ |
2cb5cc8b DW |
5007 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
5008 | EXT4_FEATURE_RO_COMPAT_READONLY) || | |
5009 | !ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
5010 | err = -EROFS; |
5011 | goto restore_opts; | |
5012 | } | |
8a266467 TT |
5013 | /* |
5014 | * Make sure the group descriptor checksums | |
0b8e58a1 | 5015 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
5016 | */ |
5017 | for (g = 0; g < sbi->s_groups_count; g++) { | |
5018 | struct ext4_group_desc *gdp = | |
5019 | ext4_get_group_desc(sb, g, NULL); | |
5020 | ||
feb0ab32 | 5021 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
5022 | ext4_msg(sb, KERN_ERR, |
5023 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
5024 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
5025 | le16_to_cpu(gdp->bg_checksum)); | |
5026 | err = -EINVAL; | |
5027 | goto restore_opts; | |
5028 | } | |
5029 | } | |
5030 | ||
ead6596b ES |
5031 | /* |
5032 | * If we have an unprocessed orphan list hanging | |
5033 | * around from a previously readonly bdev mount, | |
5034 | * require a full umount/remount for now. | |
5035 | */ | |
5036 | if (es->s_last_orphan) { | |
b31e1552 | 5037 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
5038 | "remount RDWR because of unprocessed " |
5039 | "orphan inode list. Please " | |
b31e1552 | 5040 | "umount/remount instead"); |
ead6596b ES |
5041 | err = -EINVAL; |
5042 | goto restore_opts; | |
5043 | } | |
5044 | ||
ac27a0ec DK |
5045 | /* |
5046 | * Mounting a RDONLY partition read-write, so reread | |
5047 | * and store the current valid flag. (It may have | |
5048 | * been changed by e2fsck since we originally mounted | |
5049 | * the partition.) | |
5050 | */ | |
0390131b FM |
5051 | if (sbi->s_journal) |
5052 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 5053 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 5054 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 5055 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
5056 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
5057 | EXT4_FEATURE_INCOMPAT_MMP)) | |
5058 | if (ext4_multi_mount_protect(sb, | |
5059 | le64_to_cpu(es->s_mmp_block))) { | |
5060 | err = -EROFS; | |
5061 | goto restore_opts; | |
5062 | } | |
c79d967d | 5063 | enable_quota = 1; |
ac27a0ec DK |
5064 | } |
5065 | } | |
bfff6873 LC |
5066 | |
5067 | /* | |
5068 | * Reinitialize lazy itable initialization thread based on | |
5069 | * current settings | |
5070 | */ | |
5071 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
5072 | ext4_unregister_li_request(sb); | |
5073 | else { | |
5074 | ext4_group_t first_not_zeroed; | |
5075 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
5076 | ext4_register_li_request(sb, first_not_zeroed); | |
5077 | } | |
5078 | ||
6fd058f7 | 5079 | ext4_setup_system_zone(sb); |
d096ad0f | 5080 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 5081 | ext4_commit_super(sb, 1); |
0390131b | 5082 | |
ac27a0ec DK |
5083 | #ifdef CONFIG_QUOTA |
5084 | /* Release old quota file names */ | |
a2d4a646 | 5085 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 5086 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
5087 | if (enable_quota) { |
5088 | if (sb_any_quota_suspended(sb)) | |
5089 | dquot_resume(sb, -1); | |
5090 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
5091 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
5092 | err = ext4_enable_quotas(sb); | |
07724f98 | 5093 | if (err) |
7c319d32 | 5094 | goto restore_opts; |
7c319d32 AK |
5095 | } |
5096 | } | |
ac27a0ec | 5097 | #endif |
d4c402d9 | 5098 | |
a26f4992 | 5099 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
5100 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
5101 | kfree(orig_data); | |
ac27a0ec | 5102 | return 0; |
0b8e58a1 | 5103 | |
ac27a0ec DK |
5104 | restore_opts: |
5105 | sb->s_flags = old_sb_flags; | |
5106 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 5107 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
5108 | sbi->s_resuid = old_opts.s_resuid; |
5109 | sbi->s_resgid = old_opts.s_resgid; | |
5110 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
5111 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
5112 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
5113 | #ifdef CONFIG_QUOTA |
5114 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 5115 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 5116 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
5117 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
5118 | } | |
5119 | #endif | |
d4c402d9 | 5120 | kfree(orig_data); |
ac27a0ec DK |
5121 | return err; |
5122 | } | |
5123 | ||
2b2d6d01 | 5124 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
5125 | { |
5126 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
5127 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
5128 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 5129 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 5130 | u64 fsid; |
d02a9391 | 5131 | s64 bfree; |
27dd4385 | 5132 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 5133 | |
952fc18e TT |
5134 | if (!test_opt(sb, MINIX_DF)) |
5135 | overhead = sbi->s_overhead; | |
ac27a0ec | 5136 | |
617ba13b | 5137 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 5138 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 5139 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
5140 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
5141 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 5142 | /* prevent underflow in case that few free space is available */ |
57042651 | 5143 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
5144 | buf->f_bavail = buf->f_bfree - |
5145 | (ext4_r_blocks_count(es) + resv_blocks); | |
5146 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
5147 | buf->f_bavail = 0; |
5148 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 5149 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 5150 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
5151 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
5152 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
5153 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
5154 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 5155 | |
ac27a0ec DK |
5156 | return 0; |
5157 | } | |
5158 | ||
0b8e58a1 AD |
5159 | /* Helper function for writing quotas on sync - we need to start transaction |
5160 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 5161 | * Process 1 Process 2 |
617ba13b | 5162 | * ext4_create() quota_sync() |
a269eb18 | 5163 | * jbd2_journal_start() write_dquot() |
871a2931 | 5164 | * dquot_initialize() down(dqio_mutex) |
dab291af | 5165 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
5166 | * |
5167 | */ | |
5168 | ||
5169 | #ifdef CONFIG_QUOTA | |
5170 | ||
5171 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
5172 | { | |
4c376dca | 5173 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
5174 | } |
5175 | ||
617ba13b | 5176 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
5177 | { |
5178 | int ret, err; | |
5179 | handle_t *handle; | |
5180 | struct inode *inode; | |
5181 | ||
5182 | inode = dquot_to_inode(dquot); | |
9924a92a | 5183 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 5184 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5185 | if (IS_ERR(handle)) |
5186 | return PTR_ERR(handle); | |
5187 | ret = dquot_commit(dquot); | |
617ba13b | 5188 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5189 | if (!ret) |
5190 | ret = err; | |
5191 | return ret; | |
5192 | } | |
5193 | ||
617ba13b | 5194 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
5195 | { |
5196 | int ret, err; | |
5197 | handle_t *handle; | |
5198 | ||
9924a92a | 5199 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5200 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5201 | if (IS_ERR(handle)) |
5202 | return PTR_ERR(handle); | |
5203 | ret = dquot_acquire(dquot); | |
617ba13b | 5204 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5205 | if (!ret) |
5206 | ret = err; | |
5207 | return ret; | |
5208 | } | |
5209 | ||
617ba13b | 5210 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5211 | { |
5212 | int ret, err; | |
5213 | handle_t *handle; | |
5214 | ||
9924a92a | 5215 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5216 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5217 | if (IS_ERR(handle)) { |
5218 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5219 | dquot_release(dquot); | |
ac27a0ec | 5220 | return PTR_ERR(handle); |
9c3013e9 | 5221 | } |
ac27a0ec | 5222 | ret = dquot_release(dquot); |
617ba13b | 5223 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5224 | if (!ret) |
5225 | ret = err; | |
5226 | return ret; | |
5227 | } | |
5228 | ||
617ba13b | 5229 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5230 | { |
262b4662 JK |
5231 | struct super_block *sb = dquot->dq_sb; |
5232 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5233 | ||
2c8be6b2 | 5234 | /* Are we journaling quotas? */ |
262b4662 JK |
5235 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || |
5236 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 5237 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5238 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5239 | } else { |
5240 | return dquot_mark_dquot_dirty(dquot); | |
5241 | } | |
5242 | } | |
5243 | ||
617ba13b | 5244 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5245 | { |
5246 | int ret, err; | |
5247 | handle_t *handle; | |
5248 | ||
5249 | /* Data block + inode block */ | |
2b0143b5 | 5250 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5251 | if (IS_ERR(handle)) |
5252 | return PTR_ERR(handle); | |
5253 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5254 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5255 | if (!ret) |
5256 | ret = err; | |
5257 | return ret; | |
5258 | } | |
5259 | ||
5260 | /* | |
5261 | * Turn on quotas during mount time - we need to find | |
5262 | * the quota file and such... | |
5263 | */ | |
617ba13b | 5264 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5265 | { |
287a8095 CH |
5266 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5267 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5268 | } |
5269 | ||
5270 | /* | |
5271 | * Standard function to be called on quota_on | |
5272 | */ | |
617ba13b | 5273 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 5274 | struct path *path) |
ac27a0ec DK |
5275 | { |
5276 | int err; | |
ac27a0ec DK |
5277 | |
5278 | if (!test_opt(sb, QUOTA)) | |
5279 | return -EINVAL; | |
0623543b | 5280 | |
ac27a0ec | 5281 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5282 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5283 | return -EXDEV; |
0623543b JK |
5284 | /* Journaling quota? */ |
5285 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5286 | /* Quotafile not in fs root? */ |
f00c9e44 | 5287 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5288 | ext4_msg(sb, KERN_WARNING, |
5289 | "Quota file not on filesystem root. " | |
5290 | "Journaled quota will not work"); | |
2b2d6d01 | 5291 | } |
0623543b JK |
5292 | |
5293 | /* | |
5294 | * When we journal data on quota file, we have to flush journal to see | |
5295 | * all updates to the file when we bypass pagecache... | |
5296 | */ | |
0390131b | 5297 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5298 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5299 | /* |
5300 | * We don't need to lock updates but journal_flush() could | |
5301 | * otherwise be livelocked... | |
5302 | */ | |
5303 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5304 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5305 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5306 | if (err) |
7ffe1ea8 | 5307 | return err; |
0623543b JK |
5308 | } |
5309 | ||
f00c9e44 | 5310 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
5311 | } |
5312 | ||
7c319d32 AK |
5313 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5314 | unsigned int flags) | |
5315 | { | |
5316 | int err; | |
5317 | struct inode *qf_inode; | |
a2d4a646 | 5318 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 AK |
5319 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
5320 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5321 | }; | |
5322 | ||
5323 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); | |
5324 | ||
5325 | if (!qf_inums[type]) | |
5326 | return -EPERM; | |
5327 | ||
5328 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5329 | if (IS_ERR(qf_inode)) { | |
5330 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5331 | return PTR_ERR(qf_inode); | |
5332 | } | |
5333 | ||
bcb13850 JK |
5334 | /* Don't account quota for quota files to avoid recursion */ |
5335 | qf_inode->i_flags |= S_NOQUOTA; | |
7c319d32 AK |
5336 | err = dquot_enable(qf_inode, type, format_id, flags); |
5337 | iput(qf_inode); | |
5338 | ||
5339 | return err; | |
5340 | } | |
5341 | ||
5342 | /* Enable usage tracking for all quota types. */ | |
5343 | static int ext4_enable_quotas(struct super_block *sb) | |
5344 | { | |
5345 | int type, err = 0; | |
a2d4a646 | 5346 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 AK |
5347 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
5348 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5349 | }; | |
5350 | ||
5351 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5352 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5353 | if (qf_inums[type]) { |
5354 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5355 | DQUOT_USAGE_ENABLED); | |
5356 | if (err) { | |
5357 | ext4_warning(sb, | |
72ba7450 TT |
5358 | "Failed to enable quota tracking " |
5359 | "(type=%d, err=%d). Please run " | |
5360 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5361 | return err; |
5362 | } | |
5363 | } | |
5364 | } | |
5365 | return 0; | |
5366 | } | |
5367 | ||
ca0e05e4 DM |
5368 | static int ext4_quota_off(struct super_block *sb, int type) |
5369 | { | |
21f97697 JK |
5370 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5371 | handle_t *handle; | |
5372 | ||
87009d86 DM |
5373 | /* Force all delayed allocation blocks to be allocated. |
5374 | * Caller already holds s_umount sem */ | |
5375 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5376 | sync_filesystem(sb); |
ca0e05e4 | 5377 | |
0b268590 AG |
5378 | if (!inode) |
5379 | goto out; | |
5380 | ||
21f97697 JK |
5381 | /* Update modification times of quota files when userspace can |
5382 | * start looking at them */ | |
9924a92a | 5383 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5384 | if (IS_ERR(handle)) |
5385 | goto out; | |
5386 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5387 | ext4_mark_inode_dirty(handle, inode); | |
5388 | ext4_journal_stop(handle); | |
5389 | ||
5390 | out: | |
ca0e05e4 DM |
5391 | return dquot_quota_off(sb, type); |
5392 | } | |
5393 | ||
ac27a0ec DK |
5394 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5395 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5396 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5397 | * we don't have to be afraid of races */ |
617ba13b | 5398 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5399 | size_t len, loff_t off) |
5400 | { | |
5401 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5402 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5403 | int offset = off & (sb->s_blocksize - 1); |
5404 | int tocopy; | |
5405 | size_t toread; | |
5406 | struct buffer_head *bh; | |
5407 | loff_t i_size = i_size_read(inode); | |
5408 | ||
5409 | if (off > i_size) | |
5410 | return 0; | |
5411 | if (off+len > i_size) | |
5412 | len = i_size-off; | |
5413 | toread = len; | |
5414 | while (toread > 0) { | |
5415 | tocopy = sb->s_blocksize - offset < toread ? | |
5416 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5417 | bh = ext4_bread(NULL, inode, blk, 0); |
5418 | if (IS_ERR(bh)) | |
5419 | return PTR_ERR(bh); | |
ac27a0ec DK |
5420 | if (!bh) /* A hole? */ |
5421 | memset(data, 0, tocopy); | |
5422 | else | |
5423 | memcpy(data, bh->b_data+offset, tocopy); | |
5424 | brelse(bh); | |
5425 | offset = 0; | |
5426 | toread -= tocopy; | |
5427 | data += tocopy; | |
5428 | blk++; | |
5429 | } | |
5430 | return len; | |
5431 | } | |
5432 | ||
5433 | /* Write to quotafile (we know the transaction is already started and has | |
5434 | * enough credits) */ | |
617ba13b | 5435 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5436 | const char *data, size_t len, loff_t off) |
5437 | { | |
5438 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5439 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5440 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5441 | int retries = 0; |
ac27a0ec DK |
5442 | struct buffer_head *bh; |
5443 | handle_t *handle = journal_current_handle(); | |
5444 | ||
0390131b | 5445 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5446 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5447 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5448 | (unsigned long long)off, (unsigned long long)len); |
5449 | return -EIO; | |
5450 | } | |
67eeb568 DM |
5451 | /* |
5452 | * Since we account only one data block in transaction credits, | |
5453 | * then it is impossible to cross a block boundary. | |
5454 | */ | |
5455 | if (sb->s_blocksize - offset < len) { | |
5456 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5457 | " cancelled because not block aligned", | |
5458 | (unsigned long long)off, (unsigned long long)len); | |
5459 | return -EIO; | |
5460 | } | |
5461 | ||
c5e298ae TT |
5462 | do { |
5463 | bh = ext4_bread(handle, inode, blk, | |
5464 | EXT4_GET_BLOCKS_CREATE | | |
5465 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5466 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5467 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5468 | if (IS_ERR(bh)) |
5469 | return PTR_ERR(bh); | |
67eeb568 DM |
5470 | if (!bh) |
5471 | goto out; | |
5d601255 | 5472 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5473 | err = ext4_journal_get_write_access(handle, bh); |
5474 | if (err) { | |
5475 | brelse(bh); | |
1c215028 | 5476 | return err; |
ac27a0ec | 5477 | } |
67eeb568 DM |
5478 | lock_buffer(bh); |
5479 | memcpy(bh->b_data+offset, data, len); | |
5480 | flush_dcache_page(bh->b_page); | |
5481 | unlock_buffer(bh); | |
62d2b5f2 | 5482 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5483 | brelse(bh); |
ac27a0ec | 5484 | out: |
67eeb568 DM |
5485 | if (inode->i_size < off + len) { |
5486 | i_size_write(inode, off + len); | |
617ba13b | 5487 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5488 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5489 | } |
67eeb568 | 5490 | return len; |
ac27a0ec DK |
5491 | } |
5492 | ||
5493 | #endif | |
5494 | ||
152a0836 AV |
5495 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5496 | const char *dev_name, void *data) | |
ac27a0ec | 5497 | { |
152a0836 | 5498 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5499 | } |
5500 | ||
37f328eb | 5501 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5502 | static inline void register_as_ext2(void) |
5503 | { | |
5504 | int err = register_filesystem(&ext2_fs_type); | |
5505 | if (err) | |
5506 | printk(KERN_WARNING | |
5507 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5508 | } | |
5509 | ||
5510 | static inline void unregister_as_ext2(void) | |
5511 | { | |
5512 | unregister_filesystem(&ext2_fs_type); | |
5513 | } | |
2035e776 TT |
5514 | |
5515 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5516 | { | |
5517 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
5518 | return 0; | |
5519 | if (sb->s_flags & MS_RDONLY) | |
5520 | return 1; | |
5521 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
5522 | return 0; | |
5523 | return 1; | |
5524 | } | |
24b58424 TT |
5525 | #else |
5526 | static inline void register_as_ext2(void) { } | |
5527 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5528 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5529 | #endif |
5530 | ||
37f328eb | 5531 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5532 | static inline void register_as_ext3(void) |
5533 | { | |
5534 | int err = register_filesystem(&ext3_fs_type); | |
5535 | if (err) | |
5536 | printk(KERN_WARNING | |
5537 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5538 | } | |
5539 | ||
5540 | static inline void unregister_as_ext3(void) | |
5541 | { | |
5542 | unregister_filesystem(&ext3_fs_type); | |
5543 | } | |
2035e776 TT |
5544 | |
5545 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5546 | { | |
5547 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
5548 | return 0; | |
5549 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
5550 | return 0; | |
5551 | if (sb->s_flags & MS_RDONLY) | |
5552 | return 1; | |
5553 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5554 | return 0; | |
5555 | return 1; | |
5556 | } | |
24b58424 TT |
5557 | #else |
5558 | static inline void register_as_ext3(void) { } | |
5559 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5560 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5561 | #endif |
5562 | ||
03010a33 TT |
5563 | static struct file_system_type ext4_fs_type = { |
5564 | .owner = THIS_MODULE, | |
5565 | .name = "ext4", | |
152a0836 | 5566 | .mount = ext4_mount, |
03010a33 TT |
5567 | .kill_sb = kill_block_super, |
5568 | .fs_flags = FS_REQUIRES_DEV, | |
5569 | }; | |
7f78e035 | 5570 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5571 | |
8f021222 | 5572 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5573 | { |
5574 | struct ext4_features *ef; | |
5575 | int ret = -ENOMEM; | |
5576 | ||
5577 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5578 | if (!ef) | |
5579 | goto out; | |
5580 | ||
5581 | ef->f_kobj.kset = ext4_kset; | |
5582 | init_completion(&ef->f_kobj_unregister); | |
5583 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5584 | "features"); | |
5585 | if (ret) { | |
5586 | kfree(ef); | |
5587 | goto out; | |
5588 | } | |
5589 | ||
5590 | ext4_feat = ef; | |
5591 | ret = 0; | |
5592 | out: | |
5593 | return ret; | |
5594 | } | |
5595 | ||
8f021222 LC |
5596 | static void ext4_exit_feat_adverts(void) |
5597 | { | |
5598 | kobject_put(&ext4_feat->f_kobj); | |
5599 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5600 | kfree(ext4_feat); | |
5601 | } | |
5602 | ||
e9e3bcec ES |
5603 | /* Shared across all ext4 file systems */ |
5604 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5605 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5606 | ||
5dabfc78 | 5607 | static int __init ext4_init_fs(void) |
ac27a0ec | 5608 | { |
e9e3bcec | 5609 | int i, err; |
c9de560d | 5610 | |
07c0c5d8 AV |
5611 | ext4_li_info = NULL; |
5612 | mutex_init(&ext4_li_mtx); | |
5613 | ||
9a4c8019 | 5614 | /* Build-time check for flags consistency */ |
12e9b892 | 5615 | ext4_check_flag_values(); |
e9e3bcec ES |
5616 | |
5617 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5618 | mutex_init(&ext4__aio_mutex[i]); | |
5619 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5620 | } | |
5621 | ||
51865fda | 5622 | err = ext4_init_es(); |
6fd058f7 TT |
5623 | if (err) |
5624 | return err; | |
51865fda ZL |
5625 | |
5626 | err = ext4_init_pageio(); | |
5627 | if (err) | |
5628 | goto out7; | |
5629 | ||
5dabfc78 | 5630 | err = ext4_init_system_zone(); |
bd2d0210 | 5631 | if (err) |
d44651d0 | 5632 | goto out6; |
3197ebdb | 5633 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
0e376b1e TT |
5634 | if (!ext4_kset) { |
5635 | err = -ENOMEM; | |
dd68314c | 5636 | goto out5; |
0e376b1e | 5637 | } |
d44651d0 | 5638 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5639 | |
5640 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5641 | if (err) |
5642 | goto out4; | |
857ac889 | 5643 | |
5dabfc78 | 5644 | err = ext4_init_mballoc(); |
c9de560d AT |
5645 | if (err) |
5646 | goto out2; | |
9c191f70 M |
5647 | else |
5648 | ext4_mballoc_ready = 1; | |
ac27a0ec DK |
5649 | err = init_inodecache(); |
5650 | if (err) | |
5651 | goto out1; | |
24b58424 | 5652 | register_as_ext3(); |
2035e776 | 5653 | register_as_ext2(); |
03010a33 | 5654 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5655 | if (err) |
5656 | goto out; | |
bfff6873 | 5657 | |
ac27a0ec DK |
5658 | return 0; |
5659 | out: | |
24b58424 TT |
5660 | unregister_as_ext2(); |
5661 | unregister_as_ext3(); | |
ac27a0ec DK |
5662 | destroy_inodecache(); |
5663 | out1: | |
9c191f70 | 5664 | ext4_mballoc_ready = 0; |
5dabfc78 | 5665 | ext4_exit_mballoc(); |
9c191f70 | 5666 | out2: |
8f021222 | 5667 | ext4_exit_feat_adverts(); |
dd68314c | 5668 | out4: |
d44651d0 FJ |
5669 | if (ext4_proc_root) |
5670 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5671 | kset_unregister(ext4_kset); |
d44651d0 | 5672 | out5: |
5dabfc78 | 5673 | ext4_exit_system_zone(); |
d44651d0 | 5674 | out6: |
5dabfc78 | 5675 | ext4_exit_pageio(); |
51865fda ZL |
5676 | out7: |
5677 | ext4_exit_es(); | |
5678 | ||
ac27a0ec DK |
5679 | return err; |
5680 | } | |
5681 | ||
5dabfc78 | 5682 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5683 | { |
e298e73b | 5684 | ext4_exit_crypto(); |
bfff6873 | 5685 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5686 | unregister_as_ext2(); |
5687 | unregister_as_ext3(); | |
03010a33 | 5688 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5689 | destroy_inodecache(); |
5dabfc78 | 5690 | ext4_exit_mballoc(); |
8f021222 | 5691 | ext4_exit_feat_adverts(); |
9f6200bb | 5692 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5693 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5694 | ext4_exit_system_zone(); |
5695 | ext4_exit_pageio(); | |
dd12ed14 | 5696 | ext4_exit_es(); |
ac27a0ec DK |
5697 | } |
5698 | ||
5699 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5700 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5701 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5702 | module_init(ext4_init_fs) |
5703 | module_exit(ext4_exit_fs) |