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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> | |
66114cad | 27 | #include <linux/backing-dev.h> |
ac27a0ec | 28 | #include <linux/parser.h> |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
3197ebdb | 37 | #include <linux/ctype.h> |
1330593e | 38 | #include <linux/log2.h> |
717d50e4 | 39 | #include <linux/crc16.h> |
7abc52c2 | 40 | #include <linux/cleancache.h> |
7c0f6ba6 | 41 | #include <linux/uaccess.h> |
ac27a0ec | 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 | ||
0b75a840 LC |
56 | static struct ext4_lazy_init *ext4_li_info; |
57 | static struct mutex ext4_li_mtx; | |
e294a537 | 58 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
9f6200bb | 59 | |
617ba13b | 60 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 61 | unsigned long journal_devnum); |
2adf6da8 | 62 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 63 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
64 | static void ext4_mark_recovery_complete(struct super_block *sb, |
65 | struct ext4_super_block *es); | |
66 | static void ext4_clear_journal_err(struct super_block *sb, | |
67 | struct ext4_super_block *es); | |
617ba13b | 68 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 TT |
69 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
70 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 71 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 72 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
73 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
74 | const char *dev_name, void *data); | |
2035e776 TT |
75 | static inline int ext2_feature_set_ok(struct super_block *sb); |
76 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 77 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
78 | static void ext4_destroy_lazyinit_thread(void); |
79 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 80 | static void ext4_clear_request_list(void); |
c6cb7e77 EW |
81 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
82 | unsigned int journal_inum); | |
ac27a0ec | 83 | |
e74031fd JK |
84 | /* |
85 | * Lock ordering | |
86 | * | |
87 | * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and | |
88 | * i_mmap_rwsem (inode->i_mmap_rwsem)! | |
89 | * | |
90 | * page fault path: | |
91 | * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> | |
92 | * page lock -> i_data_sem (rw) | |
93 | * | |
94 | * buffered write path: | |
95 | * sb_start_write -> i_mutex -> mmap_sem | |
96 | * sb_start_write -> i_mutex -> transaction start -> page lock -> | |
97 | * i_data_sem (rw) | |
98 | * | |
99 | * truncate: | |
100 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
101 | * i_mmap_rwsem (w) -> page lock | |
102 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
103 | * transaction start -> i_data_sem (rw) | |
104 | * | |
105 | * direct IO: | |
106 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem | |
107 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> | |
108 | * transaction start -> i_data_sem (rw) | |
109 | * | |
110 | * writepages: | |
111 | * transaction start -> page lock(s) -> i_data_sem (rw) | |
112 | */ | |
113 | ||
c290ea01 | 114 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
2035e776 TT |
115 | static struct file_system_type ext2_fs_type = { |
116 | .owner = THIS_MODULE, | |
117 | .name = "ext2", | |
118 | .mount = ext4_mount, | |
119 | .kill_sb = kill_block_super, | |
120 | .fs_flags = FS_REQUIRES_DEV, | |
121 | }; | |
7f78e035 | 122 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 123 | MODULE_ALIAS("ext2"); |
2035e776 TT |
124 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
125 | #else | |
126 | #define IS_EXT2_SB(sb) (0) | |
127 | #endif | |
128 | ||
129 | ||
ba69f9ab JK |
130 | static struct file_system_type ext3_fs_type = { |
131 | .owner = THIS_MODULE, | |
132 | .name = "ext3", | |
152a0836 | 133 | .mount = ext4_mount, |
ba69f9ab JK |
134 | .kill_sb = kill_block_super, |
135 | .fs_flags = FS_REQUIRES_DEV, | |
136 | }; | |
7f78e035 | 137 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 138 | MODULE_ALIAS("ext3"); |
ba69f9ab | 139 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
bd81d8ee | 140 | |
d25425f8 DW |
141 | static int ext4_verify_csum_type(struct super_block *sb, |
142 | struct ext4_super_block *es) | |
143 | { | |
e2b911c5 | 144 | if (!ext4_has_feature_metadata_csum(sb)) |
d25425f8 DW |
145 | return 1; |
146 | ||
147 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
148 | } | |
149 | ||
a9c47317 DW |
150 | static __le32 ext4_superblock_csum(struct super_block *sb, |
151 | struct ext4_super_block *es) | |
152 | { | |
153 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
154 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
155 | __u32 csum; | |
156 | ||
157 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
158 | ||
159 | return cpu_to_le32(csum); | |
160 | } | |
161 | ||
c197855e SH |
162 | static int ext4_superblock_csum_verify(struct super_block *sb, |
163 | struct ext4_super_block *es) | |
a9c47317 | 164 | { |
9aa5d32b | 165 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
166 | return 1; |
167 | ||
168 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
169 | } | |
170 | ||
06db49e6 | 171 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 172 | { |
06db49e6 TT |
173 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
174 | ||
9aa5d32b | 175 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
176 | return; |
177 | ||
178 | es->s_checksum = ext4_superblock_csum(sb, es); | |
179 | } | |
180 | ||
9933fc0a TT |
181 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
182 | { | |
183 | void *ret; | |
184 | ||
8be04b93 | 185 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
186 | if (!ret) |
187 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
188 | return ret; | |
189 | } | |
190 | ||
191 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
192 | { | |
193 | void *ret; | |
194 | ||
8be04b93 | 195 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
196 | if (!ret) |
197 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
198 | return ret; | |
199 | } | |
200 | ||
8fadc143 AR |
201 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
202 | struct ext4_group_desc *bg) | |
bd81d8ee | 203 | { |
3a14589c | 204 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 205 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 206 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
207 | } |
208 | ||
8fadc143 AR |
209 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
210 | struct ext4_group_desc *bg) | |
bd81d8ee | 211 | { |
5272f837 | 212 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 213 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 214 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
215 | } |
216 | ||
8fadc143 AR |
217 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
218 | struct ext4_group_desc *bg) | |
bd81d8ee | 219 | { |
5272f837 | 220 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 221 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 222 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
223 | } |
224 | ||
021b65bb TT |
225 | __u32 ext4_free_group_clusters(struct super_block *sb, |
226 | struct ext4_group_desc *bg) | |
560671a0 AK |
227 | { |
228 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
229 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 230 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
231 | } |
232 | ||
233 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
234 | struct ext4_group_desc *bg) | |
235 | { | |
236 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
237 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 238 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
239 | } |
240 | ||
241 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
242 | struct ext4_group_desc *bg) | |
243 | { | |
244 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
245 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 246 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
247 | } |
248 | ||
249 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
250 | struct ext4_group_desc *bg) | |
251 | { | |
252 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
253 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 254 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
255 | } |
256 | ||
8fadc143 AR |
257 | void ext4_block_bitmap_set(struct super_block *sb, |
258 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 259 | { |
3a14589c | 260 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
261 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
262 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
263 | } |
264 | ||
8fadc143 AR |
265 | void ext4_inode_bitmap_set(struct super_block *sb, |
266 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 267 | { |
5272f837 | 268 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
269 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
270 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
271 | } |
272 | ||
8fadc143 AR |
273 | void ext4_inode_table_set(struct super_block *sb, |
274 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 275 | { |
5272f837 | 276 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
277 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
278 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
279 | } |
280 | ||
021b65bb TT |
281 | void ext4_free_group_clusters_set(struct super_block *sb, |
282 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
283 | { |
284 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
285 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
286 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
287 | } | |
288 | ||
289 | void ext4_free_inodes_set(struct super_block *sb, | |
290 | struct ext4_group_desc *bg, __u32 count) | |
291 | { | |
292 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
293 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
294 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
295 | } | |
296 | ||
297 | void ext4_used_dirs_set(struct super_block *sb, | |
298 | struct ext4_group_desc *bg, __u32 count) | |
299 | { | |
300 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
301 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
302 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
303 | } | |
304 | ||
305 | void ext4_itable_unused_set(struct super_block *sb, | |
306 | struct ext4_group_desc *bg, __u32 count) | |
307 | { | |
308 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
309 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
310 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
311 | } | |
312 | ||
d3d1faf6 | 313 | |
1c13d5c0 TT |
314 | static void __save_error_info(struct super_block *sb, const char *func, |
315 | unsigned int line) | |
316 | { | |
317 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
318 | ||
319 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
1b46617b TT |
320 | if (bdev_read_only(sb->s_bdev)) |
321 | return; | |
1c13d5c0 TT |
322 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
323 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
324 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
325 | es->s_last_error_line = cpu_to_le32(line); | |
326 | if (!es->s_first_error_time) { | |
327 | es->s_first_error_time = es->s_last_error_time; | |
328 | strncpy(es->s_first_error_func, func, | |
329 | sizeof(es->s_first_error_func)); | |
330 | es->s_first_error_line = cpu_to_le32(line); | |
331 | es->s_first_error_ino = es->s_last_error_ino; | |
332 | es->s_first_error_block = es->s_last_error_block; | |
333 | } | |
66e61a9e TT |
334 | /* |
335 | * Start the daily error reporting function if it hasn't been | |
336 | * started already | |
337 | */ | |
338 | if (!es->s_error_count) | |
339 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 340 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
341 | } |
342 | ||
343 | static void save_error_info(struct super_block *sb, const char *func, | |
344 | unsigned int line) | |
345 | { | |
346 | __save_error_info(sb, func, line); | |
347 | ext4_commit_super(sb, 1); | |
348 | } | |
349 | ||
bdfe0cbd TT |
350 | /* |
351 | * The del_gendisk() function uninitializes the disk-specific data | |
352 | * structures, including the bdi structure, without telling anyone | |
353 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
354 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
355 | * This is a kludge to prevent these oops until we can put in a proper | |
356 | * hook in del_gendisk() to inform the VFS and file system layers. | |
357 | */ | |
358 | static int block_device_ejected(struct super_block *sb) | |
359 | { | |
360 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
361 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); | |
362 | ||
363 | return bdi->dev == NULL; | |
364 | } | |
365 | ||
18aadd47 BJ |
366 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
367 | { | |
368 | struct super_block *sb = journal->j_private; | |
369 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
370 | int error = is_journal_aborted(journal); | |
5d3ee208 | 371 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 372 | |
5d3ee208 | 373 | BUG_ON(txn->t_state == T_FINISHED); |
18aadd47 | 374 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
375 | while (!list_empty(&txn->t_private_list)) { |
376 | jce = list_entry(txn->t_private_list.next, | |
377 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
378 | list_del_init(&jce->jce_list); |
379 | spin_unlock(&sbi->s_md_lock); | |
380 | jce->jce_func(sb, jce, error); | |
381 | spin_lock(&sbi->s_md_lock); | |
382 | } | |
383 | spin_unlock(&sbi->s_md_lock); | |
384 | } | |
1c13d5c0 | 385 | |
ac27a0ec DK |
386 | /* Deal with the reporting of failure conditions on a filesystem such as |
387 | * inconsistencies detected or read IO failures. | |
388 | * | |
389 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 390 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
391 | * write ordering constraints on the superblock which prevent us from |
392 | * writing it out straight away; and given that the journal is about to | |
393 | * be aborted, we can't rely on the current, or future, transactions to | |
394 | * write out the superblock safely. | |
395 | * | |
dab291af | 396 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 397 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
398 | * that error until we've noted it down and cleared it. |
399 | */ | |
400 | ||
617ba13b | 401 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 402 | { |
ac27a0ec DK |
403 | if (sb->s_flags & MS_RDONLY) |
404 | return; | |
405 | ||
2b2d6d01 | 406 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 407 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 408 | |
4ab2f15b | 409 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 410 | if (journal) |
dab291af | 411 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 412 | } |
2b2d6d01 | 413 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 414 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
415 | /* |
416 | * Make sure updated value of ->s_mount_flags will be visible | |
417 | * before ->s_flags update | |
418 | */ | |
419 | smp_wmb(); | |
ac27a0ec DK |
420 | sb->s_flags |= MS_RDONLY; |
421 | } | |
4327ba52 DJ |
422 | if (test_opt(sb, ERRORS_PANIC)) { |
423 | if (EXT4_SB(sb)->s_journal && | |
424 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
425 | return; | |
617ba13b | 426 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec | 427 | sb->s_id); |
4327ba52 | 428 | } |
ac27a0ec DK |
429 | } |
430 | ||
efbed4dc TT |
431 | #define ext4_error_ratelimit(sb) \ |
432 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
433 | "EXT4-fs error") | |
434 | ||
12062ddd | 435 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 436 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 437 | { |
0ff2ea7d | 438 | struct va_format vaf; |
ac27a0ec DK |
439 | va_list args; |
440 | ||
efbed4dc TT |
441 | if (ext4_error_ratelimit(sb)) { |
442 | va_start(args, fmt); | |
443 | vaf.fmt = fmt; | |
444 | vaf.va = &args; | |
445 | printk(KERN_CRIT | |
446 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
447 | sb->s_id, function, line, current->comm, &vaf); | |
448 | va_end(args); | |
449 | } | |
f3fc0210 | 450 | save_error_info(sb, function, line); |
617ba13b | 451 | ext4_handle_error(sb); |
ac27a0ec DK |
452 | } |
453 | ||
e7c96e8e JP |
454 | void __ext4_error_inode(struct inode *inode, const char *function, |
455 | unsigned int line, ext4_fsblk_t block, | |
456 | const char *fmt, ...) | |
273df556 FM |
457 | { |
458 | va_list args; | |
f7c21177 | 459 | struct va_format vaf; |
1c13d5c0 | 460 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 461 | |
1c13d5c0 TT |
462 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
463 | es->s_last_error_block = cpu_to_le64(block); | |
efbed4dc TT |
464 | if (ext4_error_ratelimit(inode->i_sb)) { |
465 | va_start(args, fmt); | |
466 | vaf.fmt = fmt; | |
467 | vaf.va = &args; | |
468 | if (block) | |
469 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
470 | "inode #%lu: block %llu: comm %s: %pV\n", | |
471 | inode->i_sb->s_id, function, line, inode->i_ino, | |
472 | block, current->comm, &vaf); | |
473 | else | |
474 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
475 | "inode #%lu: comm %s: %pV\n", | |
476 | inode->i_sb->s_id, function, line, inode->i_ino, | |
477 | current->comm, &vaf); | |
478 | va_end(args); | |
479 | } | |
1c13d5c0 | 480 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
481 | ext4_handle_error(inode->i_sb); |
482 | } | |
483 | ||
e7c96e8e JP |
484 | void __ext4_error_file(struct file *file, const char *function, |
485 | unsigned int line, ext4_fsblk_t block, | |
486 | const char *fmt, ...) | |
273df556 FM |
487 | { |
488 | va_list args; | |
f7c21177 | 489 | struct va_format vaf; |
1c13d5c0 | 490 | struct ext4_super_block *es; |
496ad9aa | 491 | struct inode *inode = file_inode(file); |
273df556 FM |
492 | char pathname[80], *path; |
493 | ||
1c13d5c0 TT |
494 | es = EXT4_SB(inode->i_sb)->s_es; |
495 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
efbed4dc | 496 | if (ext4_error_ratelimit(inode->i_sb)) { |
9bf39ab2 | 497 | path = file_path(file, pathname, sizeof(pathname)); |
efbed4dc TT |
498 | if (IS_ERR(path)) |
499 | path = "(unknown)"; | |
500 | va_start(args, fmt); | |
501 | vaf.fmt = fmt; | |
502 | vaf.va = &args; | |
503 | if (block) | |
504 | printk(KERN_CRIT | |
505 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
506 | "block %llu: comm %s: path %s: %pV\n", | |
507 | inode->i_sb->s_id, function, line, inode->i_ino, | |
508 | block, current->comm, path, &vaf); | |
509 | else | |
510 | printk(KERN_CRIT | |
511 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
512 | "comm %s: path %s: %pV\n", | |
513 | inode->i_sb->s_id, function, line, inode->i_ino, | |
514 | current->comm, path, &vaf); | |
515 | va_end(args); | |
516 | } | |
1c13d5c0 | 517 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
518 | ext4_handle_error(inode->i_sb); |
519 | } | |
520 | ||
722887dd TT |
521 | const char *ext4_decode_error(struct super_block *sb, int errno, |
522 | char nbuf[16]) | |
ac27a0ec DK |
523 | { |
524 | char *errstr = NULL; | |
525 | ||
526 | switch (errno) { | |
6a797d27 DW |
527 | case -EFSCORRUPTED: |
528 | errstr = "Corrupt filesystem"; | |
529 | break; | |
530 | case -EFSBADCRC: | |
531 | errstr = "Filesystem failed CRC"; | |
532 | break; | |
ac27a0ec DK |
533 | case -EIO: |
534 | errstr = "IO failure"; | |
535 | break; | |
536 | case -ENOMEM: | |
537 | errstr = "Out of memory"; | |
538 | break; | |
539 | case -EROFS: | |
78f1ddbb TT |
540 | if (!sb || (EXT4_SB(sb)->s_journal && |
541 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
542 | errstr = "Journal has aborted"; |
543 | else | |
544 | errstr = "Readonly filesystem"; | |
545 | break; | |
546 | default: | |
547 | /* If the caller passed in an extra buffer for unknown | |
548 | * errors, textualise them now. Else we just return | |
549 | * NULL. */ | |
550 | if (nbuf) { | |
551 | /* Check for truncated error codes... */ | |
552 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
553 | errstr = nbuf; | |
554 | } | |
555 | break; | |
556 | } | |
557 | ||
558 | return errstr; | |
559 | } | |
560 | ||
617ba13b | 561 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
562 | * automatically and invokes the appropriate error response. */ |
563 | ||
c398eda0 TT |
564 | void __ext4_std_error(struct super_block *sb, const char *function, |
565 | unsigned int line, int errno) | |
ac27a0ec DK |
566 | { |
567 | char nbuf[16]; | |
568 | const char *errstr; | |
569 | ||
570 | /* Special case: if the error is EROFS, and we're not already | |
571 | * inside a transaction, then there's really no point in logging | |
572 | * an error. */ | |
573 | if (errno == -EROFS && journal_current_handle() == NULL && | |
574 | (sb->s_flags & MS_RDONLY)) | |
575 | return; | |
576 | ||
efbed4dc TT |
577 | if (ext4_error_ratelimit(sb)) { |
578 | errstr = ext4_decode_error(sb, errno, nbuf); | |
579 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
580 | sb->s_id, function, line, errstr); | |
581 | } | |
ac27a0ec | 582 | |
efbed4dc | 583 | save_error_info(sb, function, line); |
617ba13b | 584 | ext4_handle_error(sb); |
ac27a0ec DK |
585 | } |
586 | ||
587 | /* | |
617ba13b | 588 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
589 | * abort function may be used to deal with unrecoverable failures such |
590 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
591 | * | |
592 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
593 | * unless the error response on the fs has been set to panic in which | |
594 | * case we take the easy way out and panic immediately. | |
595 | */ | |
596 | ||
c67d859e | 597 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 598 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 599 | { |
651e1c3b | 600 | struct va_format vaf; |
ac27a0ec DK |
601 | va_list args; |
602 | ||
1c13d5c0 | 603 | save_error_info(sb, function, line); |
ac27a0ec | 604 | va_start(args, fmt); |
651e1c3b JP |
605 | vaf.fmt = fmt; |
606 | vaf.va = &args; | |
607 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", | |
608 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
609 | va_end(args); |
610 | ||
1c13d5c0 TT |
611 | if ((sb->s_flags & MS_RDONLY) == 0) { |
612 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 613 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
614 | /* |
615 | * Make sure updated value of ->s_mount_flags will be visible | |
616 | * before ->s_flags update | |
617 | */ | |
618 | smp_wmb(); | |
619 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
620 | if (EXT4_SB(sb)->s_journal) |
621 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
622 | save_error_info(sb, function, line); | |
623 | } | |
4327ba52 DJ |
624 | if (test_opt(sb, ERRORS_PANIC)) { |
625 | if (EXT4_SB(sb)->s_journal && | |
626 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
627 | return; | |
617ba13b | 628 | panic("EXT4-fs panic from previous error\n"); |
4327ba52 | 629 | } |
ac27a0ec DK |
630 | } |
631 | ||
e7c96e8e JP |
632 | void __ext4_msg(struct super_block *sb, |
633 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 634 | { |
0ff2ea7d | 635 | struct va_format vaf; |
b31e1552 ES |
636 | va_list args; |
637 | ||
efbed4dc TT |
638 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
639 | return; | |
640 | ||
b31e1552 | 641 | va_start(args, fmt); |
0ff2ea7d JP |
642 | vaf.fmt = fmt; |
643 | vaf.va = &args; | |
644 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
645 | va_end(args); |
646 | } | |
647 | ||
b03a2f7e AD |
648 | #define ext4_warning_ratelimit(sb) \ |
649 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
650 | "EXT4-fs warning") | |
651 | ||
12062ddd | 652 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 653 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 654 | { |
0ff2ea7d | 655 | struct va_format vaf; |
ac27a0ec DK |
656 | va_list args; |
657 | ||
b03a2f7e | 658 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
659 | return; |
660 | ||
ac27a0ec | 661 | va_start(args, fmt); |
0ff2ea7d JP |
662 | vaf.fmt = fmt; |
663 | vaf.va = &args; | |
664 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
665 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
666 | va_end(args); |
667 | } | |
668 | ||
b03a2f7e AD |
669 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
670 | unsigned int line, const char *fmt, ...) | |
671 | { | |
672 | struct va_format vaf; | |
673 | va_list args; | |
674 | ||
675 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
676 | return; | |
677 | ||
678 | va_start(args, fmt); | |
679 | vaf.fmt = fmt; | |
680 | vaf.va = &args; | |
681 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
682 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
683 | function, line, inode->i_ino, current->comm, &vaf); | |
684 | va_end(args); | |
685 | } | |
686 | ||
e29136f8 TT |
687 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
688 | struct super_block *sb, ext4_group_t grp, | |
689 | unsigned long ino, ext4_fsblk_t block, | |
690 | const char *fmt, ...) | |
5d1b1b3f AK |
691 | __releases(bitlock) |
692 | __acquires(bitlock) | |
693 | { | |
0ff2ea7d | 694 | struct va_format vaf; |
5d1b1b3f AK |
695 | va_list args; |
696 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
697 | ||
1c13d5c0 TT |
698 | es->s_last_error_ino = cpu_to_le32(ino); |
699 | es->s_last_error_block = cpu_to_le64(block); | |
700 | __save_error_info(sb, function, line); | |
0ff2ea7d | 701 | |
efbed4dc TT |
702 | if (ext4_error_ratelimit(sb)) { |
703 | va_start(args, fmt); | |
704 | vaf.fmt = fmt; | |
705 | vaf.va = &args; | |
706 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
707 | sb->s_id, function, line, grp); | |
708 | if (ino) | |
709 | printk(KERN_CONT "inode %lu: ", ino); | |
710 | if (block) | |
711 | printk(KERN_CONT "block %llu:", | |
712 | (unsigned long long) block); | |
713 | printk(KERN_CONT "%pV\n", &vaf); | |
714 | va_end(args); | |
715 | } | |
5d1b1b3f AK |
716 | |
717 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 718 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
719 | return; |
720 | } | |
1c13d5c0 | 721 | |
5d1b1b3f AK |
722 | ext4_unlock_group(sb, grp); |
723 | ext4_handle_error(sb); | |
724 | /* | |
725 | * We only get here in the ERRORS_RO case; relocking the group | |
726 | * may be dangerous, but nothing bad will happen since the | |
727 | * filesystem will have already been marked read/only and the | |
728 | * journal has been aborted. We return 1 as a hint to callers | |
729 | * who might what to use the return value from | |
25985edc | 730 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
731 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
732 | * aggressively from the ext4 function in question, with a | |
733 | * more appropriate error code. | |
734 | */ | |
735 | ext4_lock_group(sb, grp); | |
736 | return; | |
737 | } | |
738 | ||
617ba13b | 739 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 740 | { |
617ba13b | 741 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 742 | |
617ba13b | 743 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
744 | return; |
745 | ||
12062ddd | 746 | ext4_warning(sb, |
ac27a0ec DK |
747 | "updating to rev %d because of new feature flag, " |
748 | "running e2fsck is recommended", | |
617ba13b | 749 | EXT4_DYNAMIC_REV); |
ac27a0ec | 750 | |
617ba13b MC |
751 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
752 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
753 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
754 | /* leave es->s_feature_*compat flags alone */ |
755 | /* es->s_uuid will be set by e2fsck if empty */ | |
756 | ||
757 | /* | |
758 | * The rest of the superblock fields should be zero, and if not it | |
759 | * means they are likely already in use, so leave them alone. We | |
760 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
761 | */ | |
762 | } | |
763 | ||
764 | /* | |
765 | * Open the external journal device | |
766 | */ | |
b31e1552 | 767 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
768 | { |
769 | struct block_device *bdev; | |
770 | char b[BDEVNAME_SIZE]; | |
771 | ||
d4d77629 | 772 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
773 | if (IS_ERR(bdev)) |
774 | goto fail; | |
775 | return bdev; | |
776 | ||
777 | fail: | |
b31e1552 | 778 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
779 | __bdevname(dev, b), PTR_ERR(bdev)); |
780 | return NULL; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Release the journal device | |
785 | */ | |
4385bab1 | 786 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 787 | { |
4385bab1 | 788 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
789 | } |
790 | ||
4385bab1 | 791 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
792 | { |
793 | struct block_device *bdev; | |
ac27a0ec DK |
794 | bdev = sbi->journal_bdev; |
795 | if (bdev) { | |
4385bab1 | 796 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
797 | sbi->journal_bdev = NULL; |
798 | } | |
ac27a0ec DK |
799 | } |
800 | ||
801 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
802 | { | |
617ba13b | 803 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
804 | } |
805 | ||
617ba13b | 806 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
807 | { |
808 | struct list_head *l; | |
809 | ||
b31e1552 ES |
810 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
811 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
812 | |
813 | printk(KERN_ERR "sb_info orphan list:\n"); | |
814 | list_for_each(l, &sbi->s_orphan) { | |
815 | struct inode *inode = orphan_list_entry(l); | |
816 | printk(KERN_ERR " " | |
817 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
818 | inode->i_sb->s_id, inode->i_ino, inode, | |
819 | inode->i_mode, inode->i_nlink, | |
820 | NEXT_ORPHAN(inode)); | |
821 | } | |
822 | } | |
823 | ||
2b2d6d01 | 824 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 825 | { |
617ba13b MC |
826 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
827 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 828 | int i, err; |
ac27a0ec | 829 | |
857ac889 | 830 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
831 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
832 | ||
2e8fa54e | 833 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 834 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 835 | |
0390131b FM |
836 | if (sbi->s_journal) { |
837 | err = jbd2_journal_destroy(sbi->s_journal); | |
838 | sbi->s_journal = NULL; | |
839 | if (err < 0) | |
c67d859e | 840 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 841 | } |
d4edac31 | 842 | |
ebd173be | 843 | ext4_unregister_sysfs(sb); |
d3922a77 | 844 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 845 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
846 | ext4_release_system_zone(sb); |
847 | ext4_mb_release(sb); | |
848 | ext4_ext_release(sb); | |
d4edac31 | 849 | |
ac27a0ec | 850 | if (!(sb->s_flags & MS_RDONLY)) { |
e2b911c5 | 851 | ext4_clear_feature_journal_needs_recovery(sb); |
ac27a0ec | 852 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 853 | } |
58c5873a | 854 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
855 | ext4_commit_super(sb, 1); |
856 | ||
ac27a0ec DK |
857 | for (i = 0; i < sbi->s_gdb_count; i++) |
858 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
859 | kvfree(sbi->s_group_desc); |
860 | kvfree(sbi->s_flex_groups); | |
57042651 | 861 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
862 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
863 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 864 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c8585c6f | 865 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
ac27a0ec | 866 | #ifdef CONFIG_QUOTA |
a2d4a646 | 867 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
868 | kfree(sbi->s_qf_names[i]); |
869 | #endif | |
870 | ||
871 | /* Debugging code just in case the in-memory inode orphan list | |
872 | * isn't empty. The on-disk one can be non-empty if we've | |
873 | * detected an error and taken the fs readonly, but the | |
874 | * in-memory list had better be clean by this point. */ | |
875 | if (!list_empty(&sbi->s_orphan)) | |
876 | dump_orphan_list(sb, sbi); | |
877 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
878 | ||
89d96a6f | 879 | sync_blockdev(sb->s_bdev); |
f98393a6 | 880 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
881 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
882 | /* | |
883 | * Invalidate the journal device's buffers. We don't want them | |
884 | * floating about in memory - the physical journal device may | |
885 | * hotswapped, and it breaks the `ro-after' testing code. | |
886 | */ | |
887 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 888 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 889 | ext4_blkdev_remove(sbi); |
ac27a0ec | 890 | } |
9c191f70 M |
891 | if (sbi->s_mb_cache) { |
892 | ext4_xattr_destroy_cache(sbi->s_mb_cache); | |
893 | sbi->s_mb_cache = NULL; | |
894 | } | |
c5e06d10 JL |
895 | if (sbi->s_mmp_tsk) |
896 | kthread_stop(sbi->s_mmp_tsk); | |
9060dd2c | 897 | brelse(sbi->s_sbh); |
ac27a0ec | 898 | sb->s_fs_info = NULL; |
3197ebdb TT |
899 | /* |
900 | * Now that we are completely done shutting down the | |
901 | * superblock, we need to actually destroy the kobject. | |
902 | */ | |
3197ebdb TT |
903 | kobject_put(&sbi->s_kobj); |
904 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
905 | if (sbi->s_chksum_driver) |
906 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 907 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 908 | kfree(sbi); |
ac27a0ec DK |
909 | } |
910 | ||
e18b890b | 911 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
912 | |
913 | /* | |
914 | * Called inside transaction, so use GFP_NOFS | |
915 | */ | |
617ba13b | 916 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 917 | { |
617ba13b | 918 | struct ext4_inode_info *ei; |
ac27a0ec | 919 | |
e6b4f8da | 920 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
921 | if (!ei) |
922 | return NULL; | |
0b8e58a1 | 923 | |
ac27a0ec | 924 | ei->vfs_inode.i_version = 1; |
202ee5df | 925 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
926 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
927 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
928 | ext4_es_init_tree(&ei->i_es_tree); |
929 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 930 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 931 | ei->i_es_all_nr = 0; |
edaa53ca | 932 | ei->i_es_shk_nr = 0; |
dd475925 | 933 | ei->i_es_shrink_lblk = 0; |
d2a17637 MC |
934 | ei->i_reserved_data_blocks = 0; |
935 | ei->i_reserved_meta_blocks = 0; | |
936 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 937 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 938 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 939 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
940 | #ifdef CONFIG_QUOTA |
941 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 942 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 943 | #endif |
8aefcd55 | 944 | ei->jinode = NULL; |
2e8fa54e | 945 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 946 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
947 | ei->i_sync_tid = 0; |
948 | ei->i_datasync_tid = 0; | |
e27f41e1 | 949 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 950 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
ac27a0ec DK |
951 | return &ei->vfs_inode; |
952 | } | |
953 | ||
7ff9c073 TT |
954 | static int ext4_drop_inode(struct inode *inode) |
955 | { | |
956 | int drop = generic_drop_inode(inode); | |
957 | ||
958 | trace_ext4_drop_inode(inode, drop); | |
959 | return drop; | |
960 | } | |
961 | ||
fa0d7e3d NP |
962 | static void ext4_i_callback(struct rcu_head *head) |
963 | { | |
964 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
965 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
966 | } | |
967 | ||
617ba13b | 968 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 969 | { |
9f7dd93d | 970 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
971 | ext4_msg(inode->i_sb, KERN_ERR, |
972 | "Inode %lu (%p): orphan list check failed!", | |
973 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
974 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
975 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
976 | true); | |
977 | dump_stack(); | |
978 | } | |
fa0d7e3d | 979 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
980 | } |
981 | ||
51cc5068 | 982 | static void init_once(void *foo) |
ac27a0ec | 983 | { |
617ba13b | 984 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 985 | |
a35afb83 | 986 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 987 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 988 | init_rwsem(&ei->i_data_sem); |
ea3d7209 | 989 | init_rwsem(&ei->i_mmap_sem); |
a35afb83 | 990 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
991 | } |
992 | ||
e67bc2b3 | 993 | static int __init init_inodecache(void) |
ac27a0ec | 994 | { |
617ba13b MC |
995 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
996 | sizeof(struct ext4_inode_info), | |
ac27a0ec | 997 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 998 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 999 | init_once); |
617ba13b | 1000 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1001 | return -ENOMEM; |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | static void destroy_inodecache(void) | |
1006 | { | |
8c0a8537 KS |
1007 | /* |
1008 | * Make sure all delayed rcu free inodes are flushed before we | |
1009 | * destroy cache. | |
1010 | */ | |
1011 | rcu_barrier(); | |
617ba13b | 1012 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1013 | } |
1014 | ||
0930fcc1 | 1015 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1016 | { |
0930fcc1 | 1017 | invalidate_inode_buffers(inode); |
dbd5768f | 1018 | clear_inode(inode); |
9f754758 | 1019 | dquot_drop(inode); |
c2ea3fde | 1020 | ext4_discard_preallocations(inode); |
51865fda | 1021 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
1022 | if (EXT4_I(inode)->jinode) { |
1023 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1024 | EXT4_I(inode)->jinode); | |
1025 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1026 | EXT4_I(inode)->jinode = NULL; | |
1027 | } | |
b7236e21 | 1028 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
a7550b30 | 1029 | fscrypt_put_encryption_info(inode, NULL); |
b7236e21 | 1030 | #endif |
ac27a0ec DK |
1031 | } |
1032 | ||
1b961ac0 | 1033 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1034 | u64 ino, u32 generation) |
ac27a0ec | 1035 | { |
ac27a0ec | 1036 | struct inode *inode; |
ac27a0ec | 1037 | |
617ba13b | 1038 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1039 | return ERR_PTR(-ESTALE); |
617ba13b | 1040 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1041 | return ERR_PTR(-ESTALE); |
1042 | ||
1043 | /* iget isn't really right if the inode is currently unallocated!! | |
1044 | * | |
617ba13b | 1045 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1046 | * deleted, so we should be safe. |
1047 | * | |
1048 | * Currently we don't know the generation for parent directory, so | |
1049 | * a generation of 0 means "accept any" | |
1050 | */ | |
f4bb2981 | 1051 | inode = ext4_iget_normal(sb, ino); |
1d1fe1ee DH |
1052 | if (IS_ERR(inode)) |
1053 | return ERR_CAST(inode); | |
1054 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1055 | iput(inode); |
1056 | return ERR_PTR(-ESTALE); | |
1057 | } | |
1b961ac0 CH |
1058 | |
1059 | return inode; | |
1060 | } | |
1061 | ||
1062 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1063 | int fh_len, int fh_type) |
1b961ac0 CH |
1064 | { |
1065 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1066 | ext4_nfs_get_inode); | |
1067 | } | |
1068 | ||
1069 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1070 | int fh_len, int fh_type) |
1b961ac0 CH |
1071 | { |
1072 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1073 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1074 | } |
1075 | ||
c39a7f84 TO |
1076 | /* |
1077 | * Try to release metadata pages (indirect blocks, directories) which are | |
1078 | * mapped via the block device. Since these pages could have journal heads | |
1079 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1080 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1081 | */ | |
0b8e58a1 AD |
1082 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1083 | gfp_t wait) | |
c39a7f84 TO |
1084 | { |
1085 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1086 | ||
1087 | WARN_ON(PageChecked(page)); | |
1088 | if (!page_has_buffers(page)) | |
1089 | return 0; | |
1090 | if (journal) | |
1091 | return jbd2_journal_try_to_free_buffers(journal, page, | |
d0164adc | 1092 | wait & ~__GFP_DIRECT_RECLAIM); |
c39a7f84 TO |
1093 | return try_to_free_buffers(page); |
1094 | } | |
1095 | ||
a7550b30 JK |
1096 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
1097 | static int ext4_get_context(struct inode *inode, void *ctx, size_t len) | |
1098 | { | |
1099 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1100 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); | |
1101 | } | |
1102 | ||
1103 | static int ext4_key_prefix(struct inode *inode, u8 **key) | |
1104 | { | |
1105 | *key = EXT4_SB(inode->i_sb)->key_prefix; | |
1106 | return EXT4_SB(inode->i_sb)->key_prefix_size; | |
1107 | } | |
1108 | ||
1109 | static int ext4_prepare_context(struct inode *inode) | |
1110 | { | |
1111 | return ext4_convert_inline_data(inode); | |
1112 | } | |
1113 | ||
1114 | static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, | |
1115 | void *fs_data) | |
1116 | { | |
2f8f5e76 EB |
1117 | handle_t *handle = fs_data; |
1118 | int res, res2, retries = 0; | |
1119 | ||
1120 | /* | |
1121 | * If a journal handle was specified, then the encryption context is | |
1122 | * being set on a new inode via inheritance and is part of a larger | |
1123 | * transaction to create the inode. Otherwise the encryption context is | |
1124 | * being set on an existing inode in its own transaction. Only in the | |
1125 | * latter case should the "retry on ENOSPC" logic be used. | |
1126 | */ | |
a7550b30 | 1127 | |
2f8f5e76 EB |
1128 | if (handle) { |
1129 | res = ext4_xattr_set_handle(handle, inode, | |
1130 | EXT4_XATTR_INDEX_ENCRYPTION, | |
1131 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1132 | ctx, len, 0); | |
a7550b30 JK |
1133 | if (!res) { |
1134 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
1135 | ext4_clear_inode_state(inode, | |
1136 | EXT4_STATE_MAY_INLINE_DATA); | |
a3caa24b JK |
1137 | /* |
1138 | * Update inode->i_flags - e.g. S_DAX may get disabled | |
1139 | */ | |
1140 | ext4_set_inode_flags(inode); | |
a7550b30 JK |
1141 | } |
1142 | return res; | |
1143 | } | |
1144 | ||
2f8f5e76 | 1145 | retry: |
a7550b30 JK |
1146 | handle = ext4_journal_start(inode, EXT4_HT_MISC, |
1147 | ext4_jbd2_credits_xattr(inode)); | |
1148 | if (IS_ERR(handle)) | |
1149 | return PTR_ERR(handle); | |
1150 | ||
2f8f5e76 EB |
1151 | res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, |
1152 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1153 | ctx, len, 0); | |
a7550b30 JK |
1154 | if (!res) { |
1155 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
a3caa24b JK |
1156 | /* Update inode->i_flags - e.g. S_DAX may get disabled */ |
1157 | ext4_set_inode_flags(inode); | |
a7550b30 JK |
1158 | res = ext4_mark_inode_dirty(handle, inode); |
1159 | if (res) | |
1160 | EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); | |
1161 | } | |
1162 | res2 = ext4_journal_stop(handle); | |
2f8f5e76 EB |
1163 | |
1164 | if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) | |
1165 | goto retry; | |
a7550b30 JK |
1166 | if (!res) |
1167 | res = res2; | |
1168 | return res; | |
1169 | } | |
1170 | ||
1171 | static int ext4_dummy_context(struct inode *inode) | |
1172 | { | |
1173 | return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); | |
1174 | } | |
1175 | ||
1176 | static unsigned ext4_max_namelen(struct inode *inode) | |
1177 | { | |
1178 | return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : | |
1179 | EXT4_NAME_LEN; | |
1180 | } | |
1181 | ||
1182 | static struct fscrypt_operations ext4_cryptops = { | |
1183 | .get_context = ext4_get_context, | |
1184 | .key_prefix = ext4_key_prefix, | |
1185 | .prepare_context = ext4_prepare_context, | |
1186 | .set_context = ext4_set_context, | |
1187 | .dummy_context = ext4_dummy_context, | |
1188 | .is_encrypted = ext4_encrypted_inode, | |
1189 | .empty_dir = ext4_empty_dir, | |
1190 | .max_namelen = ext4_max_namelen, | |
1191 | }; | |
1192 | #else | |
1193 | static struct fscrypt_operations ext4_cryptops = { | |
1194 | .is_encrypted = ext4_encrypted_inode, | |
1195 | }; | |
1196 | #endif | |
1197 | ||
ac27a0ec | 1198 | #ifdef CONFIG_QUOTA |
689c958c LX |
1199 | static char *quotatypes[] = INITQFNAMES; |
1200 | #define QTYPE2NAME(t) (quotatypes[t]) | |
ac27a0ec | 1201 | |
617ba13b MC |
1202 | static int ext4_write_dquot(struct dquot *dquot); |
1203 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1204 | static int ext4_release_dquot(struct dquot *dquot); | |
1205 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1206 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1207 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 1208 | const struct path *path); |
ca0e05e4 | 1209 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1210 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1211 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1212 | size_t len, loff_t off); |
617ba13b | 1213 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1214 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1215 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1216 | unsigned int flags); | |
1217 | static int ext4_enable_quotas(struct super_block *sb); | |
8f0e8746 | 1218 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); |
ac27a0ec | 1219 | |
96c7e0d9 JK |
1220 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1221 | { | |
1222 | return EXT4_I(inode)->i_dquot; | |
1223 | } | |
1224 | ||
61e225dc | 1225 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1226 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1227 | .write_dquot = ext4_write_dquot, |
1228 | .acquire_dquot = ext4_acquire_dquot, | |
1229 | .release_dquot = ext4_release_dquot, | |
1230 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1231 | .write_info = ext4_write_info, |
1232 | .alloc_dquot = dquot_alloc, | |
1233 | .destroy_dquot = dquot_destroy, | |
040cb378 | 1234 | .get_projid = ext4_get_projid, |
8f0e8746 | 1235 | .get_next_id = ext4_get_next_id, |
ac27a0ec DK |
1236 | }; |
1237 | ||
0d54b217 | 1238 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1239 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1240 | .quota_off = ext4_quota_off, |
287a8095 | 1241 | .quota_sync = dquot_quota_sync, |
0a240339 | 1242 | .get_state = dquot_get_state, |
287a8095 CH |
1243 | .set_info = dquot_set_dqinfo, |
1244 | .get_dqblk = dquot_get_dqblk, | |
6332b9b5 ES |
1245 | .set_dqblk = dquot_set_dqblk, |
1246 | .get_nextdqblk = dquot_get_next_dqblk, | |
ac27a0ec DK |
1247 | }; |
1248 | #endif | |
1249 | ||
ee9b6d61 | 1250 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1251 | .alloc_inode = ext4_alloc_inode, |
1252 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1253 | .write_inode = ext4_write_inode, |
1254 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1255 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1256 | .evict_inode = ext4_evict_inode, |
617ba13b | 1257 | .put_super = ext4_put_super, |
617ba13b | 1258 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1259 | .freeze_fs = ext4_freeze, |
1260 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1261 | .statfs = ext4_statfs, |
1262 | .remount_fs = ext4_remount, | |
617ba13b | 1263 | .show_options = ext4_show_options, |
ac27a0ec | 1264 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1265 | .quota_read = ext4_quota_read, |
1266 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1267 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1268 | #endif |
c39a7f84 | 1269 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1270 | }; |
1271 | ||
39655164 | 1272 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1273 | .fh_to_dentry = ext4_fh_to_dentry, |
1274 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1275 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1276 | }; |
1277 | ||
1278 | enum { | |
1279 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1280 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1281 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1282 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1283 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1284 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1285 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1286 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1287 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1288 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1289 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1290 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
49da9392 | 1291 | Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, |
1449032b | 1292 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
a26f4992 | 1293 | Opt_lazytime, Opt_nolazytime, |
1449032b | 1294 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1295 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1296 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1297 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
c6d3d56d | 1298 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
ac27a0ec DK |
1299 | }; |
1300 | ||
a447c093 | 1301 | static const match_table_t tokens = { |
ac27a0ec DK |
1302 | {Opt_bsd_df, "bsddf"}, |
1303 | {Opt_minix_df, "minixdf"}, | |
1304 | {Opt_grpid, "grpid"}, | |
1305 | {Opt_grpid, "bsdgroups"}, | |
1306 | {Opt_nogrpid, "nogrpid"}, | |
1307 | {Opt_nogrpid, "sysvgroups"}, | |
1308 | {Opt_resgid, "resgid=%u"}, | |
1309 | {Opt_resuid, "resuid=%u"}, | |
1310 | {Opt_sb, "sb=%u"}, | |
1311 | {Opt_err_cont, "errors=continue"}, | |
1312 | {Opt_err_panic, "errors=panic"}, | |
1313 | {Opt_err_ro, "errors=remount-ro"}, | |
1314 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1315 | {Opt_debug, "debug"}, |
72578c33 TT |
1316 | {Opt_removed, "oldalloc"}, |
1317 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1318 | {Opt_user_xattr, "user_xattr"}, |
1319 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1320 | {Opt_acl, "acl"}, | |
1321 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1322 | {Opt_noload, "norecovery"}, |
5a916be1 | 1323 | {Opt_noload, "noload"}, |
72578c33 TT |
1324 | {Opt_removed, "nobh"}, |
1325 | {Opt_removed, "bh"}, | |
ac27a0ec | 1326 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1327 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1328 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1329 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1330 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1331 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1332 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1333 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1334 | {Opt_abort, "abort"}, |
1335 | {Opt_data_journal, "data=journal"}, | |
1336 | {Opt_data_ordered, "data=ordered"}, | |
1337 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1338 | {Opt_data_err_abort, "data_err=abort"}, |
1339 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1340 | {Opt_offusrjquota, "usrjquota="}, |
1341 | {Opt_usrjquota, "usrjquota=%s"}, | |
1342 | {Opt_offgrpjquota, "grpjquota="}, | |
1343 | {Opt_grpjquota, "grpjquota=%s"}, | |
1344 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1345 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1346 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1347 | {Opt_grpquota, "grpquota"}, |
1348 | {Opt_noquota, "noquota"}, | |
1349 | {Opt_quota, "quota"}, | |
1350 | {Opt_usrquota, "usrquota"}, | |
49da9392 | 1351 | {Opt_prjquota, "prjquota"}, |
ac27a0ec | 1352 | {Opt_barrier, "barrier=%u"}, |
06705bff TT |
1353 | {Opt_barrier, "barrier"}, |
1354 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1355 | {Opt_i_version, "i_version"}, |
923ae0ff | 1356 | {Opt_dax, "dax"}, |
c9de560d | 1357 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1358 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1359 | {Opt_lazytime, "lazytime"}, |
1360 | {Opt_nolazytime, "nolazytime"}, | |
dd919b98 | 1361 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1362 | {Opt_removed, "mblk_io_submit"}, |
1363 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1364 | {Opt_block_validity, "block_validity"}, |
1365 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1366 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1367 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1368 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1369 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1370 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1371 | {Opt_dioread_nolock, "dioread_nolock"}, |
1372 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1373 | {Opt_discard, "discard"}, |
1374 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1375 | {Opt_init_itable, "init_itable=%u"}, |
1376 | {Opt_init_itable, "init_itable"}, | |
1377 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1378 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1379 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
c7198b9c TT |
1380 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1381 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1382 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1383 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1384 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1385 | {Opt_err, NULL}, |
ac27a0ec DK |
1386 | }; |
1387 | ||
617ba13b | 1388 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1389 | { |
617ba13b | 1390 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1391 | char *options = (char *) *data; |
1392 | ||
1393 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1394 | return 1; /* Default location */ | |
0b8e58a1 | 1395 | |
ac27a0ec | 1396 | options += 3; |
0b8e58a1 | 1397 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1398 | sb_block = simple_strtoul(options, &options, 0); |
1399 | if (*options && *options != ',') { | |
4776004f | 1400 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1401 | (char *) *data); |
1402 | return 1; | |
1403 | } | |
1404 | if (*options == ',') | |
1405 | options++; | |
1406 | *data = (void *) options; | |
0b8e58a1 | 1407 | |
ac27a0ec DK |
1408 | return sb_block; |
1409 | } | |
1410 | ||
b3881f74 | 1411 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1412 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1413 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1414 | |
56c50f11 DM |
1415 | #ifdef CONFIG_QUOTA |
1416 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1417 | { | |
1418 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1419 | char *qname; | |
03dafb5f | 1420 | int ret = -1; |
56c50f11 DM |
1421 | |
1422 | if (sb_any_quota_loaded(sb) && | |
1423 | !sbi->s_qf_names[qtype]) { | |
1424 | ext4_msg(sb, KERN_ERR, | |
1425 | "Cannot change journaled " | |
1426 | "quota options when quota turned on"); | |
57f73c2c | 1427 | return -1; |
56c50f11 | 1428 | } |
e2b911c5 | 1429 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1430 | ext4_msg(sb, KERN_INFO, "Journaled quota options " |
1431 | "ignored when QUOTA feature is enabled"); | |
1432 | return 1; | |
262b4662 | 1433 | } |
56c50f11 DM |
1434 | qname = match_strdup(args); |
1435 | if (!qname) { | |
1436 | ext4_msg(sb, KERN_ERR, | |
1437 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1438 | return -1; |
56c50f11 | 1439 | } |
03dafb5f CG |
1440 | if (sbi->s_qf_names[qtype]) { |
1441 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1442 | ret = 1; | |
1443 | else | |
1444 | ext4_msg(sb, KERN_ERR, | |
1445 | "%s quota file already specified", | |
1446 | QTYPE2NAME(qtype)); | |
1447 | goto errout; | |
56c50f11 | 1448 | } |
03dafb5f | 1449 | if (strchr(qname, '/')) { |
56c50f11 DM |
1450 | ext4_msg(sb, KERN_ERR, |
1451 | "quotafile must be on filesystem root"); | |
03dafb5f | 1452 | goto errout; |
56c50f11 | 1453 | } |
03dafb5f | 1454 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1455 | set_opt(sb, QUOTA); |
56c50f11 | 1456 | return 1; |
03dafb5f CG |
1457 | errout: |
1458 | kfree(qname); | |
1459 | return ret; | |
56c50f11 DM |
1460 | } |
1461 | ||
1462 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1463 | { | |
1464 | ||
1465 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1466 | ||
1467 | if (sb_any_quota_loaded(sb) && | |
1468 | sbi->s_qf_names[qtype]) { | |
1469 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1470 | " when quota turned on"); | |
57f73c2c | 1471 | return -1; |
56c50f11 | 1472 | } |
03dafb5f | 1473 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1474 | sbi->s_qf_names[qtype] = NULL; |
1475 | return 1; | |
1476 | } | |
1477 | #endif | |
1478 | ||
26092bf5 TT |
1479 | #define MOPT_SET 0x0001 |
1480 | #define MOPT_CLEAR 0x0002 | |
1481 | #define MOPT_NOSUPPORT 0x0004 | |
1482 | #define MOPT_EXPLICIT 0x0008 | |
1483 | #define MOPT_CLEAR_ERR 0x0010 | |
1484 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1485 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1486 | #define MOPT_Q 0 |
1487 | #define MOPT_QFMT 0x0040 | |
1488 | #else | |
1489 | #define MOPT_Q MOPT_NOSUPPORT | |
1490 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1491 | #endif |
26092bf5 | 1492 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1493 | #define MOPT_NO_EXT2 0x0100 |
1494 | #define MOPT_NO_EXT3 0x0200 | |
1495 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1496 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1497 | |
1498 | static const struct mount_opts { | |
1499 | int token; | |
1500 | int mount_opt; | |
1501 | int flags; | |
1502 | } ext4_mount_opts[] = { | |
1503 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1504 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1505 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1506 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1507 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1508 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1509 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1510 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1511 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1512 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1513 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1514 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1515 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1516 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1517 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1518 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1519 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1520 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1521 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1522 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1523 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1524 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1525 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1526 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1527 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1528 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1529 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c | 1530 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1531 | MOPT_NO_EXT2}, |
8dc0aa8c | 1532 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1533 | MOPT_NO_EXT2}, |
26092bf5 TT |
1534 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1535 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1536 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1537 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1538 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1539 | {Opt_commit, 0, MOPT_GTE0}, | |
1540 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1541 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1542 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1543 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1544 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1545 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1546 | {Opt_resuid, 0, MOPT_GTE0}, |
1547 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1548 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1549 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1550 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1551 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1552 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1553 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1554 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1555 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1556 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1557 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1558 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1559 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1560 | #else |
26092bf5 TT |
1561 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1562 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1563 | #endif |
26092bf5 TT |
1564 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1565 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1566 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1567 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1568 | MOPT_SET | MOPT_Q}, | |
1569 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1570 | MOPT_SET | MOPT_Q}, | |
49da9392 JK |
1571 | {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, |
1572 | MOPT_SET | MOPT_Q}, | |
26092bf5 | 1573 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
49da9392 JK |
1574 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), |
1575 | MOPT_CLEAR | MOPT_Q}, | |
26092bf5 TT |
1576 | {Opt_usrjquota, 0, MOPT_Q}, |
1577 | {Opt_grpjquota, 0, MOPT_Q}, | |
1578 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1579 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1580 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1581 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1582 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1583 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1584 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
26092bf5 TT |
1585 | {Opt_err, 0, 0} |
1586 | }; | |
1587 | ||
1588 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1589 | substring_t *args, unsigned long *journal_devnum, | |
1590 | unsigned int *journal_ioprio, int is_remount) | |
1591 | { | |
1592 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1593 | const struct mount_opts *m; | |
08cefc7a EB |
1594 | kuid_t uid; |
1595 | kgid_t gid; | |
26092bf5 TT |
1596 | int arg = 0; |
1597 | ||
57f73c2c TT |
1598 | #ifdef CONFIG_QUOTA |
1599 | if (token == Opt_usrjquota) | |
1600 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1601 | else if (token == Opt_grpjquota) | |
1602 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1603 | else if (token == Opt_offusrjquota) | |
1604 | return clear_qf_name(sb, USRQUOTA); | |
1605 | else if (token == Opt_offgrpjquota) | |
1606 | return clear_qf_name(sb, GRPQUOTA); | |
1607 | #endif | |
26092bf5 | 1608 | switch (token) { |
f7048605 TT |
1609 | case Opt_noacl: |
1610 | case Opt_nouser_xattr: | |
1611 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1612 | break; | |
26092bf5 TT |
1613 | case Opt_sb: |
1614 | return 1; /* handled by get_sb_block() */ | |
1615 | case Opt_removed: | |
5f3633e3 | 1616 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1617 | return 1; |
26092bf5 TT |
1618 | case Opt_abort: |
1619 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1620 | return 1; | |
1621 | case Opt_i_version: | |
1622 | sb->s_flags |= MS_I_VERSION; | |
1623 | return 1; | |
a26f4992 TT |
1624 | case Opt_lazytime: |
1625 | sb->s_flags |= MS_LAZYTIME; | |
1626 | return 1; | |
1627 | case Opt_nolazytime: | |
1628 | sb->s_flags &= ~MS_LAZYTIME; | |
1629 | return 1; | |
26092bf5 TT |
1630 | } |
1631 | ||
5f3633e3 JK |
1632 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1633 | if (token == m->token) | |
1634 | break; | |
1635 | ||
1636 | if (m->token == Opt_err) { | |
1637 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1638 | "or missing value", opt); | |
1639 | return -1; | |
1640 | } | |
1641 | ||
8dc0aa8c TT |
1642 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1643 | ext4_msg(sb, KERN_ERR, | |
1644 | "Mount option \"%s\" incompatible with ext2", opt); | |
1645 | return -1; | |
1646 | } | |
1647 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1648 | ext4_msg(sb, KERN_ERR, | |
1649 | "Mount option \"%s\" incompatible with ext3", opt); | |
1650 | return -1; | |
1651 | } | |
1652 | ||
ad4eec61 | 1653 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1654 | return -1; |
1655 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1656 | return -1; | |
c93cf2d7 DM |
1657 | if (m->flags & MOPT_EXPLICIT) { |
1658 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1659 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1660 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1661 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1662 | } else |
1663 | return -1; | |
1664 | } | |
5f3633e3 JK |
1665 | if (m->flags & MOPT_CLEAR_ERR) |
1666 | clear_opt(sb, ERRORS_MASK); | |
1667 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1668 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1669 | "options when quota turned on"); | |
1670 | return -1; | |
1671 | } | |
1672 | ||
1673 | if (m->flags & MOPT_NOSUPPORT) { | |
1674 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1675 | } else if (token == Opt_commit) { | |
1676 | if (arg == 0) | |
1677 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1678 | sbi->s_commit_interval = HZ * arg; | |
1679 | } else if (token == Opt_max_batch_time) { | |
5f3633e3 JK |
1680 | sbi->s_max_batch_time = arg; |
1681 | } else if (token == Opt_min_batch_time) { | |
1682 | sbi->s_min_batch_time = arg; | |
1683 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1684 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1685 | ext4_msg(sb, KERN_ERR, | |
1686 | "EXT4-fs: inode_readahead_blks must be " | |
1687 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1688 | return -1; |
5f3633e3 JK |
1689 | } |
1690 | sbi->s_inode_readahead_blks = arg; | |
1691 | } else if (token == Opt_init_itable) { | |
1692 | set_opt(sb, INIT_INODE_TABLE); | |
1693 | if (!args->from) | |
1694 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1695 | sbi->s_li_wait_mult = arg; | |
1696 | } else if (token == Opt_max_dir_size_kb) { | |
1697 | sbi->s_max_dir_size_kb = arg; | |
1698 | } else if (token == Opt_stripe) { | |
1699 | sbi->s_stripe = arg; | |
1700 | } else if (token == Opt_resuid) { | |
1701 | uid = make_kuid(current_user_ns(), arg); | |
1702 | if (!uid_valid(uid)) { | |
1703 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1704 | return -1; |
1705 | } | |
5f3633e3 JK |
1706 | sbi->s_resuid = uid; |
1707 | } else if (token == Opt_resgid) { | |
1708 | gid = make_kgid(current_user_ns(), arg); | |
1709 | if (!gid_valid(gid)) { | |
1710 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1711 | return -1; | |
1712 | } | |
1713 | sbi->s_resgid = gid; | |
1714 | } else if (token == Opt_journal_dev) { | |
1715 | if (is_remount) { | |
1716 | ext4_msg(sb, KERN_ERR, | |
1717 | "Cannot specify journal on remount"); | |
1718 | return -1; | |
1719 | } | |
1720 | *journal_devnum = arg; | |
ad4eec61 ES |
1721 | } else if (token == Opt_journal_path) { |
1722 | char *journal_path; | |
1723 | struct inode *journal_inode; | |
1724 | struct path path; | |
1725 | int error; | |
1726 | ||
1727 | if (is_remount) { | |
1728 | ext4_msg(sb, KERN_ERR, | |
1729 | "Cannot specify journal on remount"); | |
1730 | return -1; | |
1731 | } | |
1732 | journal_path = match_strdup(&args[0]); | |
1733 | if (!journal_path) { | |
1734 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1735 | "journal device string"); | |
1736 | return -1; | |
1737 | } | |
1738 | ||
1739 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1740 | if (error) { | |
1741 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1742 | "journal device path: error %d", error); | |
1743 | kfree(journal_path); | |
1744 | return -1; | |
1745 | } | |
1746 | ||
2b0143b5 | 1747 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1748 | if (!S_ISBLK(journal_inode->i_mode)) { |
1749 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1750 | "is not a block device", journal_path); | |
1751 | path_put(&path); | |
1752 | kfree(journal_path); | |
1753 | return -1; | |
1754 | } | |
1755 | ||
1756 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1757 | path_put(&path); | |
1758 | kfree(journal_path); | |
5f3633e3 JK |
1759 | } else if (token == Opt_journal_ioprio) { |
1760 | if (arg > 7) { | |
1761 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1762 | " (must be 0-7)"); | |
1763 | return -1; | |
1764 | } | |
1765 | *journal_ioprio = | |
1766 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1767 | } else if (token == Opt_test_dummy_encryption) { |
1768 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1769 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1770 | ext4_msg(sb, KERN_WARNING, | |
1771 | "Test dummy encryption mode enabled"); | |
1772 | #else | |
1773 | ext4_msg(sb, KERN_WARNING, | |
1774 | "Test dummy encryption mount option ignored"); | |
1775 | #endif | |
5f3633e3 JK |
1776 | } else if (m->flags & MOPT_DATAJ) { |
1777 | if (is_remount) { | |
1778 | if (!sbi->s_journal) | |
1779 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1780 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1781 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1782 | "Cannot change data mode on remount"); |
26092bf5 | 1783 | return -1; |
ac27a0ec | 1784 | } |
26092bf5 | 1785 | } else { |
5f3633e3 JK |
1786 | clear_opt(sb, DATA_FLAGS); |
1787 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1788 | } |
5f3633e3 JK |
1789 | #ifdef CONFIG_QUOTA |
1790 | } else if (m->flags & MOPT_QFMT) { | |
1791 | if (sb_any_quota_loaded(sb) && | |
1792 | sbi->s_jquota_fmt != m->mount_opt) { | |
1793 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1794 | "quota options when quota turned on"); | |
1795 | return -1; | |
1796 | } | |
e2b911c5 | 1797 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1798 | ext4_msg(sb, KERN_INFO, |
1799 | "Quota format mount options ignored " | |
262b4662 | 1800 | "when QUOTA feature is enabled"); |
c325a67c | 1801 | return 1; |
262b4662 | 1802 | } |
5f3633e3 | 1803 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 1804 | #endif |
923ae0ff | 1805 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
1806 | #ifdef CONFIG_FS_DAX |
1807 | ext4_msg(sb, KERN_WARNING, | |
1808 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
1809 | sbi->s_mount_opt |= m->mount_opt; | |
1810 | #else | |
923ae0ff RZ |
1811 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
1812 | return -1; | |
5f3633e3 | 1813 | #endif |
7915a861 AN |
1814 | } else if (token == Opt_data_err_abort) { |
1815 | sbi->s_mount_opt |= m->mount_opt; | |
1816 | } else if (token == Opt_data_err_ignore) { | |
1817 | sbi->s_mount_opt &= ~m->mount_opt; | |
5f3633e3 JK |
1818 | } else { |
1819 | if (!args->from) | |
1820 | arg = 1; | |
1821 | if (m->flags & MOPT_CLEAR) | |
1822 | arg = !arg; | |
1823 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1824 | ext4_msg(sb, KERN_WARNING, | |
1825 | "buggy handling of option %s", opt); | |
1826 | WARN_ON(1); | |
1827 | return -1; | |
1828 | } | |
1829 | if (arg != 0) | |
1830 | sbi->s_mount_opt |= m->mount_opt; | |
1831 | else | |
1832 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1833 | } |
5f3633e3 | 1834 | return 1; |
26092bf5 TT |
1835 | } |
1836 | ||
1837 | static int parse_options(char *options, struct super_block *sb, | |
1838 | unsigned long *journal_devnum, | |
1839 | unsigned int *journal_ioprio, | |
1840 | int is_remount) | |
1841 | { | |
1842 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1843 | char *p; | |
1844 | substring_t args[MAX_OPT_ARGS]; | |
1845 | int token; | |
1846 | ||
1847 | if (!options) | |
1848 | return 1; | |
1849 | ||
1850 | while ((p = strsep(&options, ",")) != NULL) { | |
1851 | if (!*p) | |
1852 | continue; | |
1853 | /* | |
1854 | * Initialize args struct so we know whether arg was | |
1855 | * found; some options take optional arguments. | |
1856 | */ | |
caecd0af | 1857 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1858 | token = match_token(p, tokens, args); |
1859 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1860 | journal_ioprio, is_remount) < 0) | |
1861 | return 0; | |
ac27a0ec DK |
1862 | } |
1863 | #ifdef CONFIG_QUOTA | |
49da9392 JK |
1864 | /* |
1865 | * We do the test below only for project quotas. 'usrquota' and | |
1866 | * 'grpquota' mount options are allowed even without quota feature | |
1867 | * to support legacy quotas in quota files. | |
1868 | */ | |
1869 | if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { | |
1870 | ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " | |
1871 | "Cannot enable project quota enforcement."); | |
1872 | return 0; | |
1873 | } | |
1874 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1875 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1876 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1877 | |
482a7425 | 1878 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1879 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1880 | |
56c50f11 | 1881 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1882 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1883 | "format mixing"); | |
ac27a0ec DK |
1884 | return 0; |
1885 | } | |
1886 | ||
1887 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1888 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1889 | "not specified"); | |
ac27a0ec DK |
1890 | return 0; |
1891 | } | |
ac27a0ec DK |
1892 | } |
1893 | #endif | |
261cb20c JK |
1894 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1895 | int blocksize = | |
1896 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1897 | ||
09cbfeaf | 1898 | if (blocksize < PAGE_SIZE) { |
261cb20c JK |
1899 | ext4_msg(sb, KERN_ERR, "can't mount with " |
1900 | "dioread_nolock if block size != PAGE_SIZE"); | |
1901 | return 0; | |
1902 | } | |
1903 | } | |
ac27a0ec DK |
1904 | return 1; |
1905 | } | |
1906 | ||
2adf6da8 TT |
1907 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1908 | struct super_block *sb) | |
1909 | { | |
1910 | #if defined(CONFIG_QUOTA) | |
1911 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1912 | ||
1913 | if (sbi->s_jquota_fmt) { | |
1914 | char *fmtname = ""; | |
1915 | ||
1916 | switch (sbi->s_jquota_fmt) { | |
1917 | case QFMT_VFS_OLD: | |
1918 | fmtname = "vfsold"; | |
1919 | break; | |
1920 | case QFMT_VFS_V0: | |
1921 | fmtname = "vfsv0"; | |
1922 | break; | |
1923 | case QFMT_VFS_V1: | |
1924 | fmtname = "vfsv1"; | |
1925 | break; | |
1926 | } | |
1927 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1928 | } | |
1929 | ||
1930 | if (sbi->s_qf_names[USRQUOTA]) | |
a068acf2 | 1931 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
2adf6da8 TT |
1932 | |
1933 | if (sbi->s_qf_names[GRPQUOTA]) | |
a068acf2 | 1934 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
2adf6da8 TT |
1935 | #endif |
1936 | } | |
1937 | ||
5a916be1 TT |
1938 | static const char *token2str(int token) |
1939 | { | |
50df9fd5 | 1940 | const struct match_token *t; |
5a916be1 TT |
1941 | |
1942 | for (t = tokens; t->token != Opt_err; t++) | |
1943 | if (t->token == token && !strchr(t->pattern, '=')) | |
1944 | break; | |
1945 | return t->pattern; | |
1946 | } | |
1947 | ||
2adf6da8 TT |
1948 | /* |
1949 | * Show an option if | |
1950 | * - it's set to a non-default value OR | |
1951 | * - if the per-sb default is different from the global default | |
1952 | */ | |
66acdcf4 TT |
1953 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1954 | int nodefs) | |
2adf6da8 | 1955 | { |
2adf6da8 TT |
1956 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1957 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1958 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1959 | const struct mount_opts *m; |
66acdcf4 | 1960 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1961 | |
66acdcf4 TT |
1962 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1963 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1964 | |
1965 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1966 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1967 | ||
1968 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1969 | int want_set = m->flags & MOPT_SET; | |
1970 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1971 | (m->flags & MOPT_CLEAR_ERR)) | |
1972 | continue; | |
66acdcf4 | 1973 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1974 | continue; /* skip if same as the default */ |
1975 | if ((want_set && | |
1976 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1977 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1978 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1979 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1980 | } |
5a916be1 | 1981 | |
08cefc7a | 1982 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1983 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1984 | SEQ_OPTS_PRINT("resuid=%u", |
1985 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1986 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1987 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1988 | SEQ_OPTS_PRINT("resgid=%u", |
1989 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1990 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1991 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1992 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1993 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1994 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1995 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1996 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1997 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1998 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1999 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 2000 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 2001 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 2002 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 2003 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 2004 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 2005 | if (nodefs || sbi->s_stripe) |
5a916be1 | 2006 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 2007 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
2008 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
2009 | SEQ_OPTS_PUTS("data=journal"); | |
2010 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2011 | SEQ_OPTS_PUTS("data=ordered"); | |
2012 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
2013 | SEQ_OPTS_PUTS("data=writeback"); | |
2014 | } | |
66acdcf4 TT |
2015 | if (nodefs || |
2016 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
2017 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
2018 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 2019 | |
66acdcf4 TT |
2020 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
2021 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 2022 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
2023 | if (nodefs || sbi->s_max_dir_size_kb) |
2024 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
7915a861 AN |
2025 | if (test_opt(sb, DATA_ERR_ABORT)) |
2026 | SEQ_OPTS_PUTS("data_err=abort"); | |
2adf6da8 TT |
2027 | |
2028 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
2029 | return 0; |
2030 | } | |
2031 | ||
66acdcf4 TT |
2032 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
2033 | { | |
2034 | return _ext4_show_options(seq, root->d_sb, 0); | |
2035 | } | |
2036 | ||
ebd173be | 2037 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
2038 | { |
2039 | struct super_block *sb = seq->private; | |
2040 | int rc; | |
2041 | ||
2042 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
2043 | rc = _ext4_show_options(seq, sb, 1); | |
2044 | seq_puts(seq, "\n"); | |
2045 | return rc; | |
2046 | } | |
2047 | ||
617ba13b | 2048 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
2049 | int read_only) |
2050 | { | |
617ba13b | 2051 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
2052 | int res = 0; |
2053 | ||
617ba13b | 2054 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
2055 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
2056 | "forcing read-only mode"); | |
ac27a0ec DK |
2057 | res = MS_RDONLY; |
2058 | } | |
2059 | if (read_only) | |
281b5995 | 2060 | goto done; |
617ba13b | 2061 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
2062 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
2063 | "running e2fsck is recommended"); | |
c8b459f4 | 2064 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
2065 | ext4_msg(sb, KERN_WARNING, |
2066 | "warning: mounting fs with errors, " | |
2067 | "running e2fsck is recommended"); | |
ed3ce80a | 2068 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
2069 | le16_to_cpu(es->s_mnt_count) >= |
2070 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
2071 | ext4_msg(sb, KERN_WARNING, |
2072 | "warning: maximal mount count reached, " | |
2073 | "running e2fsck is recommended"); | |
ac27a0ec DK |
2074 | else if (le32_to_cpu(es->s_checkinterval) && |
2075 | (le32_to_cpu(es->s_lastcheck) + | |
2076 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
2077 | ext4_msg(sb, KERN_WARNING, |
2078 | "warning: checktime reached, " | |
2079 | "running e2fsck is recommended"); | |
0b8e58a1 | 2080 | if (!sbi->s_journal) |
0390131b | 2081 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 2082 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 2083 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 2084 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 2085 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 2086 | ext4_update_dynamic_rev(sb); |
0390131b | 2087 | if (sbi->s_journal) |
e2b911c5 | 2088 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 2089 | |
e2d67052 | 2090 | ext4_commit_super(sb, 1); |
281b5995 | 2091 | done: |
ac27a0ec | 2092 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 2093 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 2094 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
2095 | sb->s_blocksize, |
2096 | sbi->s_groups_count, | |
617ba13b MC |
2097 | EXT4_BLOCKS_PER_GROUP(sb), |
2098 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 2099 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 2100 | |
7abc52c2 | 2101 | cleancache_init_fs(sb); |
ac27a0ec DK |
2102 | return res; |
2103 | } | |
2104 | ||
117fff10 TT |
2105 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
2106 | { | |
2107 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2108 | struct flex_groups *new_groups; | |
2109 | int size; | |
2110 | ||
2111 | if (!sbi->s_log_groups_per_flex) | |
2112 | return 0; | |
2113 | ||
2114 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2115 | if (size <= sbi->s_flex_groups_allocated) | |
2116 | return 0; | |
2117 | ||
2118 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
2119 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
2120 | if (!new_groups) { | |
2121 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2122 | size / (int) sizeof(struct flex_groups)); | |
2123 | return -ENOMEM; | |
2124 | } | |
2125 | ||
2126 | if (sbi->s_flex_groups) { | |
2127 | memcpy(new_groups, sbi->s_flex_groups, | |
2128 | (sbi->s_flex_groups_allocated * | |
2129 | sizeof(struct flex_groups))); | |
b93b41d4 | 2130 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2131 | } |
2132 | sbi->s_flex_groups = new_groups; | |
2133 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2134 | return 0; | |
2135 | } | |
2136 | ||
772cb7c8 JS |
2137 | static int ext4_fill_flex_info(struct super_block *sb) |
2138 | { | |
2139 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2140 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2141 | ext4_group_t flex_group; |
117fff10 | 2142 | int i, err; |
772cb7c8 | 2143 | |
503358ae | 2144 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2145 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2146 | sbi->s_log_groups_per_flex = 0; |
2147 | return 1; | |
2148 | } | |
2149 | ||
117fff10 TT |
2150 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2151 | if (err) | |
9933fc0a | 2152 | goto failed; |
772cb7c8 | 2153 | |
772cb7c8 | 2154 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2155 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2156 | |
2157 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2158 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2159 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2160 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2161 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2162 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2163 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2164 | } |
2165 | ||
2166 | return 1; | |
2167 | failed: | |
2168 | return 0; | |
2169 | } | |
2170 | ||
e2b911c5 | 2171 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2172 | struct ext4_group_desc *gdp) |
717d50e4 | 2173 | { |
b47820ed | 2174 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
717d50e4 | 2175 | __u16 crc = 0; |
feb0ab32 | 2176 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2177 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2178 | |
9aa5d32b | 2179 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2180 | /* Use new metadata_csum algorithm */ |
feb0ab32 | 2181 | __u32 csum32; |
b47820ed | 2182 | __u16 dummy_csum = 0; |
feb0ab32 | 2183 | |
feb0ab32 DW |
2184 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
2185 | sizeof(le_group)); | |
b47820ed DJ |
2186 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
2187 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, | |
2188 | sizeof(dummy_csum)); | |
2189 | offset += sizeof(dummy_csum); | |
2190 | if (offset < sbi->s_desc_size) | |
2191 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, | |
2192 | sbi->s_desc_size - offset); | |
feb0ab32 DW |
2193 | |
2194 | crc = csum32 & 0xFFFF; | |
2195 | goto out; | |
717d50e4 AD |
2196 | } |
2197 | ||
feb0ab32 | 2198 | /* old crc16 code */ |
e2b911c5 | 2199 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2200 | return 0; |
2201 | ||
feb0ab32 DW |
2202 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
2203 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2204 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2205 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2206 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2207 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2208 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2209 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2210 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2211 | offset); | |
2212 | ||
2213 | out: | |
717d50e4 AD |
2214 | return cpu_to_le16(crc); |
2215 | } | |
2216 | ||
feb0ab32 | 2217 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2218 | struct ext4_group_desc *gdp) |
2219 | { | |
feb0ab32 | 2220 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2221 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2222 | return 0; |
2223 | ||
2224 | return 1; | |
2225 | } | |
2226 | ||
feb0ab32 DW |
2227 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2228 | struct ext4_group_desc *gdp) | |
2229 | { | |
2230 | if (!ext4_has_group_desc_csum(sb)) | |
2231 | return; | |
e2b911c5 | 2232 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2233 | } |
2234 | ||
ac27a0ec | 2235 | /* Called at mount-time, super-block is locked */ |
bfff6873 | 2236 | static int ext4_check_descriptors(struct super_block *sb, |
829fa70d | 2237 | ext4_fsblk_t sb_block, |
bfff6873 | 2238 | ext4_group_t *first_not_zeroed) |
ac27a0ec | 2239 | { |
617ba13b MC |
2240 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2241 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2242 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2243 | ext4_fsblk_t block_bitmap; |
2244 | ext4_fsblk_t inode_bitmap; | |
2245 | ext4_fsblk_t inode_table; | |
ce421581 | 2246 | int flexbg_flag = 0; |
bfff6873 | 2247 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2248 | |
e2b911c5 | 2249 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2250 | flexbg_flag = 1; |
2251 | ||
af5bc92d | 2252 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2253 | |
197cd65a AM |
2254 | for (i = 0; i < sbi->s_groups_count; i++) { |
2255 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2256 | ||
ce421581 | 2257 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2258 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2259 | else |
2260 | last_block = first_block + | |
617ba13b | 2261 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2262 | |
bfff6873 LC |
2263 | if ((grp == sbi->s_groups_count) && |
2264 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2265 | grp = i; | |
2266 | ||
8fadc143 | 2267 | block_bitmap = ext4_block_bitmap(sb, gdp); |
829fa70d TT |
2268 | if (block_bitmap == sb_block) { |
2269 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2270 | "Block bitmap for group %u overlaps " | |
2271 | "superblock", i); | |
2272 | } | |
2b2d6d01 | 2273 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2274 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2275 | "Block bitmap for group %u not in group " |
b31e1552 | 2276 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2277 | return 0; |
2278 | } | |
8fadc143 | 2279 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
829fa70d TT |
2280 | if (inode_bitmap == sb_block) { |
2281 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2282 | "Inode bitmap for group %u overlaps " | |
2283 | "superblock", i); | |
2284 | } | |
2b2d6d01 | 2285 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2286 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2287 | "Inode bitmap for group %u not in group " |
b31e1552 | 2288 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2289 | return 0; |
2290 | } | |
8fadc143 | 2291 | inode_table = ext4_inode_table(sb, gdp); |
829fa70d TT |
2292 | if (inode_table == sb_block) { |
2293 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2294 | "Inode table for group %u overlaps " | |
2295 | "superblock", i); | |
2296 | } | |
bd81d8ee | 2297 | if (inode_table < first_block || |
2b2d6d01 | 2298 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2299 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2300 | "Inode table for group %u not in group " |
b31e1552 | 2301 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2302 | return 0; |
2303 | } | |
955ce5f5 | 2304 | ext4_lock_group(sb, i); |
feb0ab32 | 2305 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2306 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2307 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2308 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2309 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
7ee1ec4c | 2310 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2311 | ext4_unlock_group(sb, i); |
8a266467 | 2312 | return 0; |
7ee1ec4c | 2313 | } |
717d50e4 | 2314 | } |
955ce5f5 | 2315 | ext4_unlock_group(sb, i); |
ce421581 JS |
2316 | if (!flexbg_flag) |
2317 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2318 | } |
bfff6873 LC |
2319 | if (NULL != first_not_zeroed) |
2320 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2321 | return 1; |
2322 | } | |
2323 | ||
617ba13b | 2324 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2325 | * the superblock) which were deleted from all directories, but held open by |
2326 | * a process at the time of a crash. We walk the list and try to delete these | |
2327 | * inodes at recovery time (only with a read-write filesystem). | |
2328 | * | |
2329 | * In order to keep the orphan inode chain consistent during traversal (in | |
2330 | * case of crash during recovery), we link each inode into the superblock | |
2331 | * orphan list_head and handle it the same way as an inode deletion during | |
2332 | * normal operation (which journals the operations for us). | |
2333 | * | |
2334 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2335 | * accidentally point at an in-use or already deleted inode. The worst that | |
2336 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2337 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2338 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2339 | * inode cleanup for us, so we can safely abort without any further action. | |
2340 | */ | |
2b2d6d01 TT |
2341 | static void ext4_orphan_cleanup(struct super_block *sb, |
2342 | struct ext4_super_block *es) | |
ac27a0ec DK |
2343 | { |
2344 | unsigned int s_flags = sb->s_flags; | |
2c98eb5e | 2345 | int ret, nr_orphans = 0, nr_truncates = 0; |
ac27a0ec DK |
2346 | #ifdef CONFIG_QUOTA |
2347 | int i; | |
2348 | #endif | |
2349 | if (!es->s_last_orphan) { | |
2350 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2351 | return; | |
2352 | } | |
2353 | ||
a8f48a95 | 2354 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2355 | ext4_msg(sb, KERN_ERR, "write access " |
2356 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2357 | return; |
2358 | } | |
2359 | ||
d39195c3 AG |
2360 | /* Check if feature set would not allow a r/w mount */ |
2361 | if (!ext4_feature_set_ok(sb, 0)) { | |
2362 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2363 | "unknown ROCOMPAT features"); | |
2364 | return; | |
2365 | } | |
2366 | ||
617ba13b | 2367 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2368 | /* don't clear list on RO mount w/ errors */ |
2369 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2370 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2371 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2372 | es->s_last_orphan = 0; |
2373 | } | |
ac27a0ec DK |
2374 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2375 | return; | |
2376 | } | |
2377 | ||
2378 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2379 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2380 | sb->s_flags &= ~MS_RDONLY; |
2381 | } | |
2382 | #ifdef CONFIG_QUOTA | |
2383 | /* Needed for iput() to work correctly and not trash data */ | |
2384 | sb->s_flags |= MS_ACTIVE; | |
2385 | /* Turn on quotas so that they are updated correctly */ | |
a2d4a646 | 2386 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2387 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2388 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2389 | if (ret < 0) |
b31e1552 ES |
2390 | ext4_msg(sb, KERN_ERR, |
2391 | "Cannot turn on journaled " | |
2392 | "quota: error %d", ret); | |
ac27a0ec DK |
2393 | } |
2394 | } | |
2395 | #endif | |
2396 | ||
2397 | while (es->s_last_orphan) { | |
2398 | struct inode *inode; | |
2399 | ||
c65d5c6c VN |
2400 | /* |
2401 | * We may have encountered an error during cleanup; if | |
2402 | * so, skip the rest. | |
2403 | */ | |
2404 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { | |
2405 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2406 | es->s_last_orphan = 0; | |
2407 | break; | |
2408 | } | |
2409 | ||
97bd42b9 JB |
2410 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2411 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2412 | es->s_last_orphan = 0; |
2413 | break; | |
2414 | } | |
2415 | ||
617ba13b | 2416 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2417 | dquot_initialize(inode); |
ac27a0ec | 2418 | if (inode->i_nlink) { |
566370a2 PT |
2419 | if (test_opt(sb, DEBUG)) |
2420 | ext4_msg(sb, KERN_DEBUG, | |
2421 | "%s: truncating inode %lu to %lld bytes", | |
2422 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2423 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2424 | inode->i_ino, inode->i_size); |
5955102c | 2425 | inode_lock(inode); |
55f252c9 | 2426 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
2c98eb5e TT |
2427 | ret = ext4_truncate(inode); |
2428 | if (ret) | |
2429 | ext4_std_error(inode->i_sb, ret); | |
5955102c | 2430 | inode_unlock(inode); |
ac27a0ec DK |
2431 | nr_truncates++; |
2432 | } else { | |
566370a2 PT |
2433 | if (test_opt(sb, DEBUG)) |
2434 | ext4_msg(sb, KERN_DEBUG, | |
2435 | "%s: deleting unreferenced inode %lu", | |
2436 | __func__, inode->i_ino); | |
ac27a0ec DK |
2437 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2438 | inode->i_ino); | |
2439 | nr_orphans++; | |
2440 | } | |
2441 | iput(inode); /* The delete magic happens here! */ | |
2442 | } | |
2443 | ||
2b2d6d01 | 2444 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2445 | |
2446 | if (nr_orphans) | |
b31e1552 ES |
2447 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2448 | PLURAL(nr_orphans)); | |
ac27a0ec | 2449 | if (nr_truncates) |
b31e1552 ES |
2450 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2451 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2452 | #ifdef CONFIG_QUOTA |
2453 | /* Turn quotas off */ | |
a2d4a646 | 2454 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
ac27a0ec | 2455 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 2456 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2457 | } |
2458 | #endif | |
2459 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2460 | } | |
0b8e58a1 | 2461 | |
cd2291a4 ES |
2462 | /* |
2463 | * Maximal extent format file size. | |
2464 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2465 | * extent format containers, within a sector_t, and within i_blocks | |
2466 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2467 | * so that won't be a limiting factor. | |
2468 | * | |
f17722f9 LC |
2469 | * However there is other limiting factor. We do store extents in the form |
2470 | * of starting block and length, hence the resulting length of the extent | |
2471 | * covering maximum file size must fit into on-disk format containers as | |
2472 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2473 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2474 | * | |
cd2291a4 ES |
2475 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2476 | */ | |
f287a1a5 | 2477 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2478 | { |
2479 | loff_t res; | |
2480 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2481 | ||
2482 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2483 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2484 | /* |
90c699a9 | 2485 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2486 | * i_block represent total blocks in 512 bytes |
2487 | * 32 == size of vfs inode i_blocks * 8 | |
2488 | */ | |
2489 | upper_limit = (1LL << 32) - 1; | |
2490 | ||
2491 | /* total blocks in file system block size */ | |
2492 | upper_limit >>= (blkbits - 9); | |
2493 | upper_limit <<= blkbits; | |
2494 | } | |
2495 | ||
f17722f9 LC |
2496 | /* |
2497 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2498 | * by one fs block, so ee_len can cover the extent of maximum file | |
2499 | * size | |
2500 | */ | |
2501 | res = (1LL << 32) - 1; | |
cd2291a4 | 2502 | res <<= blkbits; |
cd2291a4 ES |
2503 | |
2504 | /* Sanity check against vm- & vfs- imposed limits */ | |
2505 | if (res > upper_limit) | |
2506 | res = upper_limit; | |
2507 | ||
2508 | return res; | |
2509 | } | |
ac27a0ec | 2510 | |
ac27a0ec | 2511 | /* |
cd2291a4 | 2512 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2513 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2514 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2515 | */ |
f287a1a5 | 2516 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2517 | { |
617ba13b | 2518 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2519 | int meta_blocks; |
2520 | loff_t upper_limit; | |
0b8e58a1 AD |
2521 | /* This is calculated to be the largest file size for a dense, block |
2522 | * mapped file such that the file's total number of 512-byte sectors, | |
2523 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2524 | * | |
2525 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2526 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2527 | */ |
2528 | ||
f287a1a5 | 2529 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2530 | /* |
90c699a9 | 2531 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2532 | * the inode i_block field represents total file blocks in |
2533 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2534 | */ |
2535 | upper_limit = (1LL << 32) - 1; | |
2536 | ||
2537 | /* total blocks in file system block size */ | |
2538 | upper_limit >>= (bits - 9); | |
2539 | ||
2540 | } else { | |
8180a562 AK |
2541 | /* |
2542 | * We use 48 bit ext4_inode i_blocks | |
2543 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2544 | * represent total number of blocks in | |
2545 | * file system block size | |
2546 | */ | |
0fc1b451 AK |
2547 | upper_limit = (1LL << 48) - 1; |
2548 | ||
0fc1b451 AK |
2549 | } |
2550 | ||
2551 | /* indirect blocks */ | |
2552 | meta_blocks = 1; | |
2553 | /* double indirect blocks */ | |
2554 | meta_blocks += 1 + (1LL << (bits-2)); | |
2555 | /* tripple indirect blocks */ | |
2556 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2557 | ||
2558 | upper_limit -= meta_blocks; | |
2559 | upper_limit <<= bits; | |
ac27a0ec DK |
2560 | |
2561 | res += 1LL << (bits-2); | |
2562 | res += 1LL << (2*(bits-2)); | |
2563 | res += 1LL << (3*(bits-2)); | |
2564 | res <<= bits; | |
2565 | if (res > upper_limit) | |
2566 | res = upper_limit; | |
0fc1b451 AK |
2567 | |
2568 | if (res > MAX_LFS_FILESIZE) | |
2569 | res = MAX_LFS_FILESIZE; | |
2570 | ||
ac27a0ec DK |
2571 | return res; |
2572 | } | |
2573 | ||
617ba13b | 2574 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2575 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2576 | { |
617ba13b | 2577 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2578 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2579 | int has_super = 0; |
2580 | ||
2581 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2582 | ||
e2b911c5 | 2583 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2584 | return logical_sb_block + nr + 1; |
ac27a0ec | 2585 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2586 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2587 | has_super = 1; |
0b8e58a1 | 2588 | |
bd63f6b0 DW |
2589 | /* |
2590 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2591 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2592 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2593 | * compensate. | |
2594 | */ | |
2595 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2596 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2597 | has_super++; | |
2598 | ||
617ba13b | 2599 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2600 | } |
2601 | ||
c9de560d AT |
2602 | /** |
2603 | * ext4_get_stripe_size: Get the stripe size. | |
2604 | * @sbi: In memory super block info | |
2605 | * | |
2606 | * If we have specified it via mount option, then | |
2607 | * use the mount option value. If the value specified at mount time is | |
2608 | * greater than the blocks per group use the super block value. | |
2609 | * If the super block value is greater than blocks per group return 0. | |
2610 | * Allocator needs it be less than blocks per group. | |
2611 | * | |
2612 | */ | |
2613 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2614 | { | |
2615 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2616 | unsigned long stripe_width = | |
2617 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2618 | int ret; |
c9de560d AT |
2619 | |
2620 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2621 | ret = sbi->s_stripe; |
2622 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2623 | ret = stripe_width; | |
2624 | else if (stride <= sbi->s_blocks_per_group) | |
2625 | ret = stride; | |
2626 | else | |
2627 | ret = 0; | |
c9de560d | 2628 | |
3eb08658 DE |
2629 | /* |
2630 | * If the stripe width is 1, this makes no sense and | |
2631 | * we set it to 0 to turn off stripe handling code. | |
2632 | */ | |
2633 | if (ret <= 1) | |
2634 | ret = 0; | |
c9de560d | 2635 | |
3eb08658 | 2636 | return ret; |
c9de560d | 2637 | } |
ac27a0ec | 2638 | |
a13fb1a4 ES |
2639 | /* |
2640 | * Check whether this filesystem can be mounted based on | |
2641 | * the features present and the RDONLY/RDWR mount requested. | |
2642 | * Returns 1 if this filesystem can be mounted as requested, | |
2643 | * 0 if it cannot be. | |
2644 | */ | |
2645 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2646 | { | |
e2b911c5 | 2647 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2648 | ext4_msg(sb, KERN_ERR, |
2649 | "Couldn't mount because of " | |
2650 | "unsupported optional features (%x)", | |
2651 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2652 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | if (readonly) | |
2657 | return 1; | |
2658 | ||
e2b911c5 | 2659 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b DW |
2660 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
2661 | sb->s_flags |= MS_RDONLY; | |
2662 | return 1; | |
2663 | } | |
2664 | ||
a13fb1a4 | 2665 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2666 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2667 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2668 | "unsupported optional features (%x)", | |
2669 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2670 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2671 | return 0; | |
2672 | } | |
2673 | /* | |
2674 | * Large file size enabled file system can only be mounted | |
2675 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2676 | */ | |
e2b911c5 | 2677 | if (ext4_has_feature_huge_file(sb)) { |
a13fb1a4 ES |
2678 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
2679 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2680 | "cannot be mounted RDWR without " | |
2681 | "CONFIG_LBDAF"); | |
2682 | return 0; | |
2683 | } | |
2684 | } | |
e2b911c5 | 2685 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2686 | ext4_msg(sb, KERN_ERR, |
2687 | "Can't support bigalloc feature without " | |
2688 | "extents feature\n"); | |
2689 | return 0; | |
2690 | } | |
7c319d32 AK |
2691 | |
2692 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2693 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2694 | ext4_msg(sb, KERN_ERR, |
2695 | "Filesystem with quota feature cannot be mounted RDWR " | |
2696 | "without CONFIG_QUOTA"); | |
2697 | return 0; | |
2698 | } | |
689c958c LX |
2699 | if (ext4_has_feature_project(sb) && !readonly) { |
2700 | ext4_msg(sb, KERN_ERR, | |
2701 | "Filesystem with project quota feature cannot be mounted RDWR " | |
2702 | "without CONFIG_QUOTA"); | |
2703 | return 0; | |
2704 | } | |
7c319d32 | 2705 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
2706 | return 1; |
2707 | } | |
2708 | ||
66e61a9e TT |
2709 | /* |
2710 | * This function is called once a day if we have errors logged | |
2711 | * on the file system | |
2712 | */ | |
2713 | static void print_daily_error_info(unsigned long arg) | |
2714 | { | |
2715 | struct super_block *sb = (struct super_block *) arg; | |
2716 | struct ext4_sb_info *sbi; | |
2717 | struct ext4_super_block *es; | |
2718 | ||
2719 | sbi = EXT4_SB(sb); | |
2720 | es = sbi->s_es; | |
2721 | ||
2722 | if (es->s_error_count) | |
ae0f78de TT |
2723 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2724 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2725 | le32_to_cpu(es->s_error_count)); |
2726 | if (es->s_first_error_time) { | |
ae0f78de | 2727 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2728 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2729 | (int) sizeof(es->s_first_error_func), | |
2730 | es->s_first_error_func, | |
2731 | le32_to_cpu(es->s_first_error_line)); | |
2732 | if (es->s_first_error_ino) | |
651e1c3b | 2733 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
2734 | le32_to_cpu(es->s_first_error_ino)); |
2735 | if (es->s_first_error_block) | |
651e1c3b | 2736 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 2737 | le64_to_cpu(es->s_first_error_block)); |
651e1c3b | 2738 | printk(KERN_CONT "\n"); |
66e61a9e TT |
2739 | } |
2740 | if (es->s_last_error_time) { | |
ae0f78de | 2741 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2742 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2743 | (int) sizeof(es->s_last_error_func), | |
2744 | es->s_last_error_func, | |
2745 | le32_to_cpu(es->s_last_error_line)); | |
2746 | if (es->s_last_error_ino) | |
651e1c3b | 2747 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
2748 | le32_to_cpu(es->s_last_error_ino)); |
2749 | if (es->s_last_error_block) | |
651e1c3b | 2750 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 2751 | le64_to_cpu(es->s_last_error_block)); |
651e1c3b | 2752 | printk(KERN_CONT "\n"); |
66e61a9e TT |
2753 | } |
2754 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2755 | } | |
2756 | ||
bfff6873 LC |
2757 | /* Find next suitable group and run ext4_init_inode_table */ |
2758 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2759 | { | |
2760 | struct ext4_group_desc *gdp = NULL; | |
2761 | ext4_group_t group, ngroups; | |
2762 | struct super_block *sb; | |
2763 | unsigned long timeout = 0; | |
2764 | int ret = 0; | |
2765 | ||
2766 | sb = elr->lr_super; | |
2767 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2768 | ||
2769 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2770 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2771 | if (!gdp) { | |
2772 | ret = 1; | |
2773 | break; | |
2774 | } | |
2775 | ||
2776 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2777 | break; | |
2778 | } | |
2779 | ||
7f511862 | 2780 | if (group >= ngroups) |
bfff6873 LC |
2781 | ret = 1; |
2782 | ||
2783 | if (!ret) { | |
2784 | timeout = jiffies; | |
2785 | ret = ext4_init_inode_table(sb, group, | |
2786 | elr->lr_timeout ? 0 : 1); | |
2787 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2788 | timeout = (jiffies - timeout) * |
2789 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2790 | elr->lr_timeout = timeout; |
2791 | } | |
2792 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2793 | elr->lr_next_group = group + 1; | |
2794 | } | |
bfff6873 LC |
2795 | return ret; |
2796 | } | |
2797 | ||
2798 | /* | |
2799 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2800 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2801 | */ |
2802 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2803 | { | |
2804 | struct ext4_sb_info *sbi; | |
2805 | ||
2806 | if (!elr) | |
2807 | return; | |
2808 | ||
2809 | sbi = elr->lr_sbi; | |
2810 | ||
2811 | list_del(&elr->lr_request); | |
2812 | sbi->s_li_request = NULL; | |
2813 | kfree(elr); | |
2814 | } | |
2815 | ||
2816 | static void ext4_unregister_li_request(struct super_block *sb) | |
2817 | { | |
1bb933fb LC |
2818 | mutex_lock(&ext4_li_mtx); |
2819 | if (!ext4_li_info) { | |
2820 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2821 | return; |
1bb933fb | 2822 | } |
bfff6873 LC |
2823 | |
2824 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2825 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2826 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2827 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2828 | } |
2829 | ||
8f1f7453 ES |
2830 | static struct task_struct *ext4_lazyinit_task; |
2831 | ||
bfff6873 LC |
2832 | /* |
2833 | * This is the function where ext4lazyinit thread lives. It walks | |
2834 | * through the request list searching for next scheduled filesystem. | |
2835 | * When such a fs is found, run the lazy initialization request | |
2836 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2837 | * function. Based on that time we compute next schedule time of | |
2838 | * the request. When walking through the list is complete, compute | |
2839 | * next waking time and put itself into sleep. | |
2840 | */ | |
2841 | static int ext4_lazyinit_thread(void *arg) | |
2842 | { | |
2843 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2844 | struct list_head *pos, *n; | |
2845 | struct ext4_li_request *elr; | |
4ed5c033 | 2846 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2847 | |
2848 | BUG_ON(NULL == eli); | |
2849 | ||
bfff6873 LC |
2850 | cont_thread: |
2851 | while (true) { | |
2852 | next_wakeup = MAX_JIFFY_OFFSET; | |
2853 | ||
2854 | mutex_lock(&eli->li_list_mtx); | |
2855 | if (list_empty(&eli->li_request_list)) { | |
2856 | mutex_unlock(&eli->li_list_mtx); | |
2857 | goto exit_thread; | |
2858 | } | |
bfff6873 | 2859 | list_for_each_safe(pos, n, &eli->li_request_list) { |
e22834f0 DM |
2860 | int err = 0; |
2861 | int progress = 0; | |
bfff6873 LC |
2862 | elr = list_entry(pos, struct ext4_li_request, |
2863 | lr_request); | |
2864 | ||
e22834f0 DM |
2865 | if (time_before(jiffies, elr->lr_next_sched)) { |
2866 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2867 | next_wakeup = elr->lr_next_sched; | |
2868 | continue; | |
2869 | } | |
2870 | if (down_read_trylock(&elr->lr_super->s_umount)) { | |
2871 | if (sb_start_write_trylock(elr->lr_super)) { | |
2872 | progress = 1; | |
2873 | /* | |
2874 | * We hold sb->s_umount, sb can not | |
2875 | * be removed from the list, it is | |
2876 | * now safe to drop li_list_mtx | |
2877 | */ | |
2878 | mutex_unlock(&eli->li_list_mtx); | |
2879 | err = ext4_run_li_request(elr); | |
2880 | sb_end_write(elr->lr_super); | |
2881 | mutex_lock(&eli->li_list_mtx); | |
2882 | n = pos->next; | |
b2c78cd0 | 2883 | } |
e22834f0 DM |
2884 | up_read((&elr->lr_super->s_umount)); |
2885 | } | |
2886 | /* error, remove the lazy_init job */ | |
2887 | if (err) { | |
2888 | ext4_remove_li_request(elr); | |
2889 | continue; | |
2890 | } | |
2891 | if (!progress) { | |
2892 | elr->lr_next_sched = jiffies + | |
2893 | (prandom_u32() | |
2894 | % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 | 2895 | } |
bfff6873 LC |
2896 | if (time_before(elr->lr_next_sched, next_wakeup)) |
2897 | next_wakeup = elr->lr_next_sched; | |
2898 | } | |
2899 | mutex_unlock(&eli->li_list_mtx); | |
2900 | ||
a0acae0e | 2901 | try_to_freeze(); |
bfff6873 | 2902 | |
4ed5c033 LC |
2903 | cur = jiffies; |
2904 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2905 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2906 | cond_resched(); |
2907 | continue; | |
2908 | } | |
2909 | ||
4ed5c033 LC |
2910 | schedule_timeout_interruptible(next_wakeup - cur); |
2911 | ||
8f1f7453 ES |
2912 | if (kthread_should_stop()) { |
2913 | ext4_clear_request_list(); | |
2914 | goto exit_thread; | |
2915 | } | |
bfff6873 LC |
2916 | } |
2917 | ||
2918 | exit_thread: | |
2919 | /* | |
2920 | * It looks like the request list is empty, but we need | |
2921 | * to check it under the li_list_mtx lock, to prevent any | |
2922 | * additions into it, and of course we should lock ext4_li_mtx | |
2923 | * to atomically free the list and ext4_li_info, because at | |
2924 | * this point another ext4 filesystem could be registering | |
2925 | * new one. | |
2926 | */ | |
2927 | mutex_lock(&ext4_li_mtx); | |
2928 | mutex_lock(&eli->li_list_mtx); | |
2929 | if (!list_empty(&eli->li_request_list)) { | |
2930 | mutex_unlock(&eli->li_list_mtx); | |
2931 | mutex_unlock(&ext4_li_mtx); | |
2932 | goto cont_thread; | |
2933 | } | |
2934 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2935 | kfree(ext4_li_info); |
2936 | ext4_li_info = NULL; | |
2937 | mutex_unlock(&ext4_li_mtx); | |
2938 | ||
2939 | return 0; | |
2940 | } | |
2941 | ||
2942 | static void ext4_clear_request_list(void) | |
2943 | { | |
2944 | struct list_head *pos, *n; | |
2945 | struct ext4_li_request *elr; | |
2946 | ||
2947 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2948 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2949 | elr = list_entry(pos, struct ext4_li_request, | |
2950 | lr_request); | |
2951 | ext4_remove_li_request(elr); | |
2952 | } | |
2953 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2954 | } | |
2955 | ||
2956 | static int ext4_run_lazyinit_thread(void) | |
2957 | { | |
8f1f7453 ES |
2958 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2959 | ext4_li_info, "ext4lazyinit"); | |
2960 | if (IS_ERR(ext4_lazyinit_task)) { | |
2961 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2962 | ext4_clear_request_list(); |
bfff6873 LC |
2963 | kfree(ext4_li_info); |
2964 | ext4_li_info = NULL; | |
92b97816 | 2965 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2966 | "initialization thread\n", |
2967 | err); | |
2968 | return err; | |
2969 | } | |
2970 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2971 | return 0; |
2972 | } | |
2973 | ||
2974 | /* | |
2975 | * Check whether it make sense to run itable init. thread or not. | |
2976 | * If there is at least one uninitialized inode table, return | |
2977 | * corresponding group number, else the loop goes through all | |
2978 | * groups and return total number of groups. | |
2979 | */ | |
2980 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2981 | { | |
2982 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2983 | struct ext4_group_desc *gdp = NULL; | |
2984 | ||
2985 | for (group = 0; group < ngroups; group++) { | |
2986 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2987 | if (!gdp) | |
2988 | continue; | |
2989 | ||
2990 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2991 | break; | |
2992 | } | |
2993 | ||
2994 | return group; | |
2995 | } | |
2996 | ||
2997 | static int ext4_li_info_new(void) | |
2998 | { | |
2999 | struct ext4_lazy_init *eli = NULL; | |
3000 | ||
3001 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3002 | if (!eli) | |
3003 | return -ENOMEM; | |
3004 | ||
bfff6873 LC |
3005 | INIT_LIST_HEAD(&eli->li_request_list); |
3006 | mutex_init(&eli->li_list_mtx); | |
3007 | ||
bfff6873 LC |
3008 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3009 | ||
3010 | ext4_li_info = eli; | |
3011 | ||
3012 | return 0; | |
3013 | } | |
3014 | ||
3015 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3016 | ext4_group_t start) | |
3017 | { | |
3018 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3019 | struct ext4_li_request *elr; | |
bfff6873 LC |
3020 | |
3021 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3022 | if (!elr) | |
3023 | return NULL; | |
3024 | ||
3025 | elr->lr_super = sb; | |
3026 | elr->lr_sbi = sbi; | |
3027 | elr->lr_next_group = start; | |
3028 | ||
3029 | /* | |
3030 | * Randomize first schedule time of the request to | |
3031 | * spread the inode table initialization requests | |
3032 | * better. | |
3033 | */ | |
dd1f723b TT |
3034 | elr->lr_next_sched = jiffies + (prandom_u32() % |
3035 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
3036 | return elr; |
3037 | } | |
3038 | ||
7f511862 TT |
3039 | int ext4_register_li_request(struct super_block *sb, |
3040 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3041 | { |
3042 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3043 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3044 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3045 | int ret = 0; |
bfff6873 | 3046 | |
7f511862 | 3047 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3048 | if (sbi->s_li_request != NULL) { |
3049 | /* | |
3050 | * Reset timeout so it can be computed again, because | |
3051 | * s_li_wait_mult might have changed. | |
3052 | */ | |
3053 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3054 | goto out; |
51ce6511 | 3055 | } |
bfff6873 LC |
3056 | |
3057 | if (first_not_zeroed == ngroups || | |
3058 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3059 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3060 | goto out; |
bfff6873 LC |
3061 | |
3062 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3063 | if (!elr) { |
3064 | ret = -ENOMEM; | |
3065 | goto out; | |
3066 | } | |
bfff6873 LC |
3067 | |
3068 | if (NULL == ext4_li_info) { | |
3069 | ret = ext4_li_info_new(); | |
3070 | if (ret) | |
3071 | goto out; | |
3072 | } | |
3073 | ||
3074 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3075 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3076 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3077 | ||
3078 | sbi->s_li_request = elr; | |
46e4690b TM |
3079 | /* |
3080 | * set elr to NULL here since it has been inserted to | |
3081 | * the request_list and the removal and free of it is | |
3082 | * handled by ext4_clear_request_list from now on. | |
3083 | */ | |
3084 | elr = NULL; | |
bfff6873 LC |
3085 | |
3086 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3087 | ret = ext4_run_lazyinit_thread(); | |
3088 | if (ret) | |
3089 | goto out; | |
3090 | } | |
bfff6873 | 3091 | out: |
beed5ecb NK |
3092 | mutex_unlock(&ext4_li_mtx); |
3093 | if (ret) | |
bfff6873 | 3094 | kfree(elr); |
bfff6873 LC |
3095 | return ret; |
3096 | } | |
3097 | ||
3098 | /* | |
3099 | * We do not need to lock anything since this is called on | |
3100 | * module unload. | |
3101 | */ | |
3102 | static void ext4_destroy_lazyinit_thread(void) | |
3103 | { | |
3104 | /* | |
3105 | * If thread exited earlier | |
3106 | * there's nothing to be done. | |
3107 | */ | |
8f1f7453 | 3108 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3109 | return; |
3110 | ||
8f1f7453 | 3111 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3112 | } |
3113 | ||
25ed6e8a DW |
3114 | static int set_journal_csum_feature_set(struct super_block *sb) |
3115 | { | |
3116 | int ret = 1; | |
3117 | int compat, incompat; | |
3118 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3119 | ||
9aa5d32b | 3120 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 3121 | /* journal checksum v3 */ |
25ed6e8a | 3122 | compat = 0; |
db9ee220 | 3123 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
3124 | } else { |
3125 | /* journal checksum v1 */ | |
3126 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3127 | incompat = 0; | |
3128 | } | |
3129 | ||
feb8c6d3 DW |
3130 | jbd2_journal_clear_features(sbi->s_journal, |
3131 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3132 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
3133 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
3134 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3135 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3136 | compat, 0, | |
3137 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3138 | incompat); | |
3139 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3140 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3141 | compat, 0, | |
3142 | incompat); | |
3143 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3144 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3145 | } else { | |
feb8c6d3 DW |
3146 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3147 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
3148 | } |
3149 | ||
3150 | return ret; | |
3151 | } | |
3152 | ||
952fc18e TT |
3153 | /* |
3154 | * Note: calculating the overhead so we can be compatible with | |
3155 | * historical BSD practice is quite difficult in the face of | |
3156 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3157 | * different block group can end up in the same allocation cluster. | |
3158 | * Calculating the exact overhead in the face of clustered allocation | |
3159 | * requires either O(all block bitmaps) in memory or O(number of block | |
3160 | * groups**2) in time. We will still calculate the superblock for | |
3161 | * older file systems --- and if we come across with a bigalloc file | |
3162 | * system with zero in s_overhead_clusters the estimate will be close to | |
3163 | * correct especially for very large cluster sizes --- but for newer | |
3164 | * file systems, it's better to calculate this figure once at mkfs | |
3165 | * time, and store it in the superblock. If the superblock value is | |
3166 | * present (even for non-bigalloc file systems), we will use it. | |
3167 | */ | |
3168 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3169 | char *buf) | |
3170 | { | |
3171 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3172 | struct ext4_group_desc *gdp; | |
3173 | ext4_fsblk_t first_block, last_block, b; | |
3174 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3175 | int s, j, count = 0; | |
3176 | ||
e2b911c5 | 3177 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3178 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3179 | sbi->s_itb_per_group + 2); | |
3180 | ||
952fc18e TT |
3181 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3182 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3183 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3184 | for (i = 0; i < ngroups; i++) { | |
3185 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3186 | b = ext4_block_bitmap(sb, gdp); | |
3187 | if (b >= first_block && b <= last_block) { | |
3188 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3189 | count++; | |
3190 | } | |
3191 | b = ext4_inode_bitmap(sb, gdp); | |
3192 | if (b >= first_block && b <= last_block) { | |
3193 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3194 | count++; | |
3195 | } | |
3196 | b = ext4_inode_table(sb, gdp); | |
3197 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3198 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3199 | int c = EXT4_B2C(sbi, b - first_block); | |
3200 | ext4_set_bit(c, buf); | |
3201 | count++; | |
3202 | } | |
3203 | if (i != grp) | |
3204 | continue; | |
3205 | s = 0; | |
3206 | if (ext4_bg_has_super(sb, grp)) { | |
3207 | ext4_set_bit(s++, buf); | |
3208 | count++; | |
3209 | } | |
c48ae41b TT |
3210 | j = ext4_bg_num_gdb(sb, grp); |
3211 | if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { | |
3212 | ext4_error(sb, "Invalid number of block group " | |
3213 | "descriptor blocks: %d", j); | |
3214 | j = EXT4_BLOCKS_PER_GROUP(sb) - s; | |
952fc18e | 3215 | } |
c48ae41b TT |
3216 | count += j; |
3217 | for (; j > 0; j--) | |
3218 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
952fc18e TT |
3219 | } |
3220 | if (!count) | |
3221 | return 0; | |
3222 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3223 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3224 | } | |
3225 | ||
3226 | /* | |
3227 | * Compute the overhead and stash it in sbi->s_overhead | |
3228 | */ | |
3229 | int ext4_calculate_overhead(struct super_block *sb) | |
3230 | { | |
3231 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3232 | struct ext4_super_block *es = sbi->s_es; | |
3c816ded EW |
3233 | struct inode *j_inode; |
3234 | unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); | |
952fc18e TT |
3235 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
3236 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3237 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3238 | |
952fc18e TT |
3239 | if (!buf) |
3240 | return -ENOMEM; | |
3241 | ||
3242 | /* | |
3243 | * Compute the overhead (FS structures). This is constant | |
3244 | * for a given filesystem unless the number of block groups | |
3245 | * changes so we cache the previous value until it does. | |
3246 | */ | |
3247 | ||
3248 | /* | |
3249 | * All of the blocks before first_data_block are overhead | |
3250 | */ | |
3251 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3252 | ||
3253 | /* | |
3254 | * Add the overhead found in each block group | |
3255 | */ | |
3256 | for (i = 0; i < ngroups; i++) { | |
3257 | int blks; | |
3258 | ||
3259 | blks = count_overhead(sb, i, buf); | |
3260 | overhead += blks; | |
3261 | if (blks) | |
3262 | memset(buf, 0, PAGE_SIZE); | |
3263 | cond_resched(); | |
3264 | } | |
3c816ded EW |
3265 | |
3266 | /* | |
3267 | * Add the internal journal blocks whether the journal has been | |
3268 | * loaded or not | |
3269 | */ | |
b003b524 | 3270 | if (sbi->s_journal && !sbi->journal_bdev) |
810da240 | 3271 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
3c816ded EW |
3272 | else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { |
3273 | j_inode = ext4_get_journal_inode(sb, j_inum); | |
3274 | if (j_inode) { | |
3275 | j_blocks = j_inode->i_size >> sb->s_blocksize_bits; | |
3276 | overhead += EXT4_NUM_B2C(sbi, j_blocks); | |
3277 | iput(j_inode); | |
3278 | } else { | |
3279 | ext4_msg(sb, KERN_ERR, "can't get journal size"); | |
3280 | } | |
3281 | } | |
952fc18e TT |
3282 | sbi->s_overhead = overhead; |
3283 | smp_wmb(); | |
3284 | free_page((unsigned long) buf); | |
3285 | return 0; | |
3286 | } | |
3287 | ||
b5799018 | 3288 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3289 | { |
3290 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3291 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3292 | |
30fac0f7 JK |
3293 | /* |
3294 | * There's no need to reserve anything when we aren't using extents. | |
3295 | * The space estimates are exact, there are no unwritten extents, | |
3296 | * hole punching doesn't need new metadata... This is needed especially | |
3297 | * to keep ext2/3 backward compatibility. | |
3298 | */ | |
e2b911c5 | 3299 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3300 | return; |
27dd4385 LC |
3301 | /* |
3302 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3303 | * This should cover the situations where we can not afford to run | |
3304 | * out of space like for example punch hole, or converting | |
556615dc | 3305 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3306 | * allocation would require 1, or 2 blocks, higher numbers are |
3307 | * very rare. | |
3308 | */ | |
b5799018 TT |
3309 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3310 | sbi->s_cluster_bits); | |
27dd4385 LC |
3311 | |
3312 | do_div(resv_clusters, 50); | |
3313 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3314 | ||
b5799018 | 3315 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3316 | } |
3317 | ||
2b2d6d01 | 3318 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3319 | { |
d4c402d9 | 3320 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3321 | struct buffer_head *bh; |
617ba13b | 3322 | struct ext4_super_block *es = NULL; |
5aee0f8a | 3323 | struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
617ba13b MC |
3324 | ext4_fsblk_t block; |
3325 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3326 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3327 | unsigned long offset = 0; |
ac27a0ec DK |
3328 | unsigned long journal_devnum = 0; |
3329 | unsigned long def_mount_opts; | |
3330 | struct inode *root; | |
0390131b | 3331 | const char *descr; |
dcc7dae3 | 3332 | int ret = -ENOMEM; |
281b5995 | 3333 | int blocksize, clustersize; |
4ec11028 TT |
3334 | unsigned int db_count; |
3335 | unsigned int i; | |
281b5995 | 3336 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3337 | __u64 blocks_count; |
07aa2ea1 | 3338 | int err = 0; |
b3881f74 | 3339 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3340 | ext4_group_t first_not_zeroed; |
ac27a0ec | 3341 | |
5aee0f8a TT |
3342 | if ((data && !orig_data) || !sbi) |
3343 | goto out_free_base; | |
705895b6 PE |
3344 | |
3345 | sbi->s_blockgroup_lock = | |
3346 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
5aee0f8a TT |
3347 | if (!sbi->s_blockgroup_lock) |
3348 | goto out_free_base; | |
3349 | ||
ac27a0ec | 3350 | sb->s_fs_info = sbi; |
2c0544b2 | 3351 | sbi->s_sb = sb; |
240799cd | 3352 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3353 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3354 | if (sb->s_bdev->bd_part) |
3355 | sbi->s_sectors_written_start = | |
3356 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3357 | |
9f6200bb | 3358 | /* Cleanup superblock name */ |
ec3904dc | 3359 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3360 | |
07aa2ea1 | 3361 | /* -EINVAL is default */ |
dcc7dae3 | 3362 | ret = -EINVAL; |
617ba13b | 3363 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3364 | if (!blocksize) { |
b31e1552 | 3365 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3366 | goto out_fail; |
3367 | } | |
3368 | ||
3369 | /* | |
617ba13b | 3370 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3371 | * block sizes. We need to calculate the offset from buffer start. |
3372 | */ | |
617ba13b | 3373 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3374 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3375 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3376 | } else { |
70bbb3e0 | 3377 | logical_sb_block = sb_block; |
ac27a0ec DK |
3378 | } |
3379 | ||
a8ac900b | 3380 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3381 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3382 | goto out_fail; |
3383 | } | |
3384 | /* | |
3385 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3386 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3387 | */ |
2716b802 | 3388 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3389 | sbi->s_es = es; |
3390 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3391 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3392 | goto cantfind_ext4; | |
afc32f7e | 3393 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3394 | |
feb0ab32 | 3395 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3396 | if (ext4_has_feature_metadata_csum(sb) && |
3397 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3398 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3399 | "redundant flags; please run fsck."); |
3400 | ||
d25425f8 DW |
3401 | /* Check for a known checksum algorithm */ |
3402 | if (!ext4_verify_csum_type(sb, es)) { | |
3403 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3404 | "unknown checksum algorithm."); | |
3405 | silent = 1; | |
3406 | goto cantfind_ext4; | |
3407 | } | |
3408 | ||
0441984a | 3409 | /* Load the checksum driver */ |
e2b911c5 | 3410 | if (ext4_has_feature_metadata_csum(sb)) { |
0441984a DW |
3411 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3412 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3413 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3414 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3415 | sbi->s_chksum_driver = NULL; | |
3416 | goto failed_mount; | |
3417 | } | |
3418 | } | |
3419 | ||
a9c47317 DW |
3420 | /* Check superblock checksum */ |
3421 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3422 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3423 | "invalid superblock checksum. Run e2fsck?"); | |
3424 | silent = 1; | |
6a797d27 | 3425 | ret = -EFSBADCRC; |
a9c47317 DW |
3426 | goto cantfind_ext4; |
3427 | } | |
3428 | ||
3429 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3430 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f DW |
3431 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
3432 | else if (ext4_has_metadata_csum(sb)) | |
a9c47317 DW |
3433 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3434 | sizeof(es->s_uuid)); | |
3435 | ||
ac27a0ec DK |
3436 | /* Set defaults before we parse the mount options */ |
3437 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3438 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3439 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3440 | set_opt(sb, DEBUG); |
87f26807 | 3441 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3442 | set_opt(sb, GRPID); |
617ba13b | 3443 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3444 | set_opt(sb, NO_UID32); |
ea663336 | 3445 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3446 | set_opt(sb, XATTR_USER); |
03010a33 | 3447 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3448 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3449 | #endif |
98c1a759 DW |
3450 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3451 | if (ext4_has_metadata_csum(sb)) | |
3452 | set_opt(sb, JOURNAL_CHECKSUM); | |
3453 | ||
617ba13b | 3454 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3455 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3456 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3457 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3458 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3459 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3460 | |
3461 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3462 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3463 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3464 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3465 | else |
fd8c37ec | 3466 | set_opt(sb, ERRORS_RO); |
45f1a9c3 DW |
3467 | /* block_validity enabled by default; disable with noblock_validity */ |
3468 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3469 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3470 | set_opt(sb, DISCARD); |
ac27a0ec | 3471 | |
08cefc7a EB |
3472 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3473 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3474 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3475 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3476 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3477 | |
8b67f04a | 3478 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3479 | set_opt(sb, BARRIER); |
ac27a0ec | 3480 | |
dd919b98 AK |
3481 | /* |
3482 | * enable delayed allocation by default | |
3483 | * Use -o nodelalloc to turn it off | |
3484 | */ | |
bc0b75f7 | 3485 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3486 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3487 | set_opt(sb, DELALLOC); |
dd919b98 | 3488 | |
51ce6511 LC |
3489 | /* |
3490 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3491 | * no mount option specified. | |
3492 | */ | |
3493 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3494 | ||
5aee0f8a TT |
3495 | if (sbi->s_es->s_mount_opts[0]) { |
3496 | char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, | |
3497 | sizeof(sbi->s_es->s_mount_opts), | |
3498 | GFP_KERNEL); | |
3499 | if (!s_mount_opts) | |
3500 | goto failed_mount; | |
3501 | if (!parse_options(s_mount_opts, sb, &journal_devnum, | |
3502 | &journal_ioprio, 0)) { | |
3503 | ext4_msg(sb, KERN_WARNING, | |
3504 | "failed to parse options in superblock: %s", | |
3505 | s_mount_opts); | |
3506 | } | |
3507 | kfree(s_mount_opts); | |
8b67f04a | 3508 | } |
5a916be1 | 3509 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3510 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3511 | &journal_ioprio, 0)) |
ac27a0ec DK |
3512 | goto failed_mount; |
3513 | ||
56889787 TT |
3514 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3515 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3516 | "with data=journal disables delayed " | |
3517 | "allocation and O_DIRECT support!\n"); | |
3518 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3519 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3520 | "both data=journal and delalloc"); | |
3521 | goto failed_mount; | |
3522 | } | |
3523 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3524 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3525 | "both data=journal and dioread_nolock"); |
56889787 TT |
3526 | goto failed_mount; |
3527 | } | |
923ae0ff RZ |
3528 | if (test_opt(sb, DAX)) { |
3529 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3530 | "both data=journal and dax"); | |
3531 | goto failed_mount; | |
3532 | } | |
73b92a2a SK |
3533 | if (ext4_has_feature_encrypt(sb)) { |
3534 | ext4_msg(sb, KERN_WARNING, | |
3535 | "encrypted files will use data=ordered " | |
3536 | "instead of data journaling mode"); | |
3537 | } | |
56889787 TT |
3538 | if (test_opt(sb, DELALLOC)) |
3539 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3540 | } else { |
3541 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3542 | } |
3543 | ||
ac27a0ec | 3544 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3545 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3546 | |
617ba13b | 3547 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3548 | (ext4_has_compat_features(sb) || |
3549 | ext4_has_ro_compat_features(sb) || | |
3550 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3551 | ext4_msg(sb, KERN_WARNING, |
3552 | "feature flags set on rev 0 fs, " | |
3553 | "running e2fsck is recommended"); | |
469108ff | 3554 | |
ed3654eb TT |
3555 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3556 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3557 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3558 | ext4_msg(sb, KERN_ERR, |
3559 | "The Hurd can't support 64-bit file systems"); | |
3560 | goto failed_mount; | |
3561 | } | |
3562 | } | |
3563 | ||
2035e776 TT |
3564 | if (IS_EXT2_SB(sb)) { |
3565 | if (ext2_feature_set_ok(sb)) | |
3566 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3567 | "using the ext4 subsystem"); | |
3568 | else { | |
3569 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3570 | "to feature incompatibilities"); | |
3571 | goto failed_mount; | |
3572 | } | |
3573 | } | |
3574 | ||
3575 | if (IS_EXT3_SB(sb)) { | |
3576 | if (ext3_feature_set_ok(sb)) | |
3577 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3578 | "using the ext4 subsystem"); | |
3579 | else { | |
3580 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3581 | "to feature incompatibilities"); | |
3582 | goto failed_mount; | |
3583 | } | |
3584 | } | |
3585 | ||
ac27a0ec DK |
3586 | /* |
3587 | * Check feature flags regardless of the revision level, since we | |
3588 | * previously didn't change the revision level when setting the flags, | |
3589 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3590 | */ | |
a13fb1a4 | 3591 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3592 | goto failed_mount; |
a13fb1a4 | 3593 | |
261cb20c | 3594 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3595 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3596 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 | 3597 | ext4_msg(sb, KERN_ERR, |
8cdf3372 TT |
3598 | "Unsupported filesystem blocksize %d (%d log_block_size)", |
3599 | blocksize, le32_to_cpu(es->s_log_block_size)); | |
3600 | goto failed_mount; | |
3601 | } | |
3602 | if (le32_to_cpu(es->s_log_block_size) > | |
3603 | (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3604 | ext4_msg(sb, KERN_ERR, | |
3605 | "Invalid log block size: %u", | |
3606 | le32_to_cpu(es->s_log_block_size)); | |
ac27a0ec DK |
3607 | goto failed_mount; |
3608 | } | |
3609 | ||
5b9554dc TT |
3610 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { |
3611 | ext4_msg(sb, KERN_ERR, | |
3612 | "Number of reserved GDT blocks insanely large: %d", | |
3613 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); | |
3614 | goto failed_mount; | |
3615 | } | |
3616 | ||
923ae0ff | 3617 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
87eefeb4 TK |
3618 | err = bdev_dax_supported(sb, blocksize); |
3619 | if (err) | |
923ae0ff | 3620 | goto failed_mount; |
923ae0ff RZ |
3621 | } |
3622 | ||
e2b911c5 | 3623 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
3624 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
3625 | es->s_encryption_level); | |
3626 | goto failed_mount; | |
3627 | } | |
3628 | ||
ac27a0ec | 3629 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3630 | /* Validate the filesystem blocksize */ |
3631 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3632 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3633 | blocksize); |
ac27a0ec DK |
3634 | goto failed_mount; |
3635 | } | |
3636 | ||
2b2d6d01 | 3637 | brelse(bh); |
70bbb3e0 AM |
3638 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3639 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3640 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3641 | if (!bh) { |
b31e1552 ES |
3642 | ext4_msg(sb, KERN_ERR, |
3643 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3644 | goto failed_mount; |
3645 | } | |
2716b802 | 3646 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3647 | sbi->s_es = es; |
617ba13b | 3648 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3649 | ext4_msg(sb, KERN_ERR, |
3650 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3651 | goto failed_mount; |
3652 | } | |
3653 | } | |
3654 | ||
e2b911c5 | 3655 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
3656 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3657 | has_huge_files); | |
3658 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3659 | |
617ba13b MC |
3660 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3661 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3662 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3663 | } else { |
3664 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3665 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3666 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3667 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3668 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3669 | ext4_msg(sb, KERN_ERR, |
3670 | "unsupported inode size: %d", | |
2b2d6d01 | 3671 | sbi->s_inode_size); |
ac27a0ec DK |
3672 | goto failed_mount; |
3673 | } | |
ef7f3835 KS |
3674 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3675 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3676 | } |
0b8e58a1 | 3677 | |
0d1ee42f | 3678 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 3679 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 3680 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3681 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3682 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3683 | ext4_msg(sb, KERN_ERR, |
3684 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3685 | sbi->s_desc_size); |
3686 | goto failed_mount; | |
3687 | } | |
3688 | } else | |
3689 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3690 | |
ac27a0ec | 3691 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3692 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
0b8e58a1 | 3693 | |
617ba13b | 3694 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3695 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3696 | goto cantfind_ext4; |
cd6bb35b TT |
3697 | if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || |
3698 | sbi->s_inodes_per_group > blocksize * 8) { | |
3699 | ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", | |
3700 | sbi->s_blocks_per_group); | |
3701 | goto failed_mount; | |
3702 | } | |
ac27a0ec DK |
3703 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3704 | sbi->s_inodes_per_block; | |
0d1ee42f | 3705 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3706 | sbi->s_sbh = bh; |
3707 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3708 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3709 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3710 | |
2b2d6d01 | 3711 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3712 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3713 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 3714 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
3715 | i = le32_to_cpu(es->s_flags); |
3716 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3717 | sbi->s_hash_unsigned = 3; | |
3718 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3719 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3720 | if (!(sb->s_flags & MS_RDONLY)) |
3721 | es->s_flags |= | |
3722 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3723 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3724 | #else |
23301410 TT |
3725 | if (!(sb->s_flags & MS_RDONLY)) |
3726 | es->s_flags |= | |
3727 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3728 | #endif |
23301410 | 3729 | } |
f99b2589 | 3730 | } |
ac27a0ec | 3731 | |
281b5995 TT |
3732 | /* Handle clustersize */ |
3733 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 3734 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
3735 | if (has_bigalloc) { |
3736 | if (clustersize < blocksize) { | |
3737 | ext4_msg(sb, KERN_ERR, | |
3738 | "cluster size (%d) smaller than " | |
3739 | "block size (%d)", clustersize, blocksize); | |
3740 | goto failed_mount; | |
3741 | } | |
8cdf3372 TT |
3742 | if (le32_to_cpu(es->s_log_cluster_size) > |
3743 | (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3744 | ext4_msg(sb, KERN_ERR, | |
3745 | "Invalid log cluster size: %u", | |
3746 | le32_to_cpu(es->s_log_cluster_size)); | |
3747 | goto failed_mount; | |
3748 | } | |
281b5995 TT |
3749 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - |
3750 | le32_to_cpu(es->s_log_block_size); | |
3751 | sbi->s_clusters_per_group = | |
3752 | le32_to_cpu(es->s_clusters_per_group); | |
3753 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3754 | ext4_msg(sb, KERN_ERR, | |
3755 | "#clusters per group too big: %lu", | |
3756 | sbi->s_clusters_per_group); | |
3757 | goto failed_mount; | |
3758 | } | |
3759 | if (sbi->s_blocks_per_group != | |
3760 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3761 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3762 | "clusters per group (%lu) inconsistent", | |
3763 | sbi->s_blocks_per_group, | |
3764 | sbi->s_clusters_per_group); | |
3765 | goto failed_mount; | |
3766 | } | |
3767 | } else { | |
3768 | if (clustersize != blocksize) { | |
3769 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3770 | "block size (%d)", clustersize, | |
3771 | blocksize); | |
3772 | clustersize = blocksize; | |
3773 | } | |
3774 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3775 | ext4_msg(sb, KERN_ERR, | |
3776 | "#blocks per group too big: %lu", | |
3777 | sbi->s_blocks_per_group); | |
3778 | goto failed_mount; | |
3779 | } | |
3780 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3781 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3782 | } |
281b5995 TT |
3783 | sbi->s_cluster_ratio = clustersize / blocksize; |
3784 | ||
960fd856 TT |
3785 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3786 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3787 | set_opt2(sb, STD_GROUP_SIZE); | |
3788 | ||
bf43d84b ES |
3789 | /* |
3790 | * Test whether we have more sectors than will fit in sector_t, | |
3791 | * and whether the max offset is addressable by the page cache. | |
3792 | */ | |
5a9ae68a | 3793 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3794 | ext4_blocks_count(es)); |
5a9ae68a | 3795 | if (err) { |
b31e1552 | 3796 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3797 | " too large to mount safely on this system"); |
ac27a0ec | 3798 | if (sizeof(sector_t) < 8) |
90c699a9 | 3799 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3800 | goto failed_mount; |
3801 | } | |
3802 | ||
617ba13b MC |
3803 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3804 | goto cantfind_ext4; | |
e7c95593 | 3805 | |
0f2ddca6 FTN |
3806 | /* check blocks count against device size */ |
3807 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3808 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3809 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3810 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3811 | ext4_blocks_count(es), blocks_count); |
3812 | goto failed_mount; | |
3813 | } | |
3814 | ||
0b8e58a1 AD |
3815 | /* |
3816 | * It makes no sense for the first data block to be beyond the end | |
3817 | * of the filesystem. | |
3818 | */ | |
3819 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3820 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3821 | "block %u is beyond end of filesystem (%llu)", |
3822 | le32_to_cpu(es->s_first_data_block), | |
3823 | ext4_blocks_count(es)); | |
e7c95593 ES |
3824 | goto failed_mount; |
3825 | } | |
bd81d8ee LV |
3826 | blocks_count = (ext4_blocks_count(es) - |
3827 | le32_to_cpu(es->s_first_data_block) + | |
3828 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3829 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3830 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3831 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3832 | "(block count %llu, first data block %u, " |
b31e1552 | 3833 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3834 | ext4_blocks_count(es), |
3835 | le32_to_cpu(es->s_first_data_block), | |
3836 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3837 | goto failed_mount; | |
3838 | } | |
bd81d8ee | 3839 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3840 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3841 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3842 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3843 | EXT4_DESC_PER_BLOCK(sb); | |
3a4b77cd EG |
3844 | if (ext4_has_feature_meta_bg(sb)) { |
3845 | if (le32_to_cpu(es->s_first_meta_bg) >= db_count) { | |
3846 | ext4_msg(sb, KERN_WARNING, | |
3847 | "first meta block group too large: %u " | |
3848 | "(group descriptor block count %u)", | |
3849 | le32_to_cpu(es->s_first_meta_bg), db_count); | |
3850 | goto failed_mount; | |
3851 | } | |
3852 | } | |
f18a5f21 TT |
3853 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3854 | sizeof(struct buffer_head *), | |
3855 | GFP_KERNEL); | |
ac27a0ec | 3856 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3857 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3858 | ret = -ENOMEM; |
ac27a0ec DK |
3859 | goto failed_mount; |
3860 | } | |
3861 | ||
705895b6 | 3862 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3863 | |
3864 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3865 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 3866 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 3867 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
3868 | ext4_msg(sb, KERN_ERR, |
3869 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3870 | db_count = i; |
3871 | goto failed_mount2; | |
3872 | } | |
3873 | } | |
829fa70d | 3874 | if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { |
b31e1552 | 3875 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 3876 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 3877 | goto failed_mount2; |
ac27a0ec | 3878 | } |
772cb7c8 | 3879 | |
f9ae9cf5 | 3880 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
3881 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
3882 | spin_lock_init(&sbi->s_next_gen_lock); | |
3883 | ||
04ecddb7 JM |
3884 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
3885 | (unsigned long) sb); | |
04496411 | 3886 | |
a75ae78f | 3887 | /* Register extent status tree shrinker */ |
eb68d0e2 | 3888 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 3889 | goto failed_mount3; |
ce7e010a | 3890 | |
c9de560d | 3891 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3892 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3893 | |
f9ae9cf5 TT |
3894 | /* |
3895 | * set up enough so that it can read an inode | |
3896 | */ | |
f6e63f90 | 3897 | sb->s_op = &ext4_sops; |
617ba13b MC |
3898 | sb->s_export_op = &ext4_export_ops; |
3899 | sb->s_xattr = ext4_xattr_handlers; | |
a7550b30 | 3900 | sb->s_cop = &ext4_cryptops; |
ac27a0ec | 3901 | #ifdef CONFIG_QUOTA |
617ba13b | 3902 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 3903 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 3904 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
3905 | else |
3906 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 3907 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 3908 | #endif |
f2fa2ffc AK |
3909 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3910 | ||
ac27a0ec | 3911 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3912 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3913 | |
3914 | sb->s_root = NULL; | |
3915 | ||
3916 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 3917 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 3918 | |
e2b911c5 | 3919 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
c5e06d10 | 3920 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 3921 | goto failed_mount3a; |
c5e06d10 | 3922 | |
ac27a0ec DK |
3923 | /* |
3924 | * The first inode we look at is the journal inode. Don't try | |
3925 | * root first: it may be modified in the journal! | |
3926 | */ | |
e2b911c5 | 3927 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
617ba13b | 3928 | if (ext4_load_journal(sb, es, journal_devnum)) |
50460fe8 | 3929 | goto failed_mount3a; |
0390131b | 3930 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
e2b911c5 | 3931 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
3932 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3933 | "suppressed and not mounted read-only"); | |
744692dc | 3934 | goto failed_mount_wq; |
ac27a0ec | 3935 | } else { |
1e381f60 DM |
3936 | /* Nojournal mode, all journal mount options are illegal */ |
3937 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
3938 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3939 | "journal_checksum, fs mounted w/o journal"); | |
3940 | goto failed_mount_wq; | |
3941 | } | |
3942 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3943 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3944 | "journal_async_commit, fs mounted w/o journal"); | |
3945 | goto failed_mount_wq; | |
3946 | } | |
3947 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
3948 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3949 | "commit=%lu, fs mounted w/o journal", | |
3950 | sbi->s_commit_interval / HZ); | |
3951 | goto failed_mount_wq; | |
3952 | } | |
3953 | if (EXT4_MOUNT_DATA_FLAGS & | |
3954 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
3955 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3956 | "data=, fs mounted w/o journal"); | |
3957 | goto failed_mount_wq; | |
3958 | } | |
3959 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
3960 | clear_opt(sb, JOURNAL_CHECKSUM); | |
fd8c37ec | 3961 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3962 | sbi->s_journal = NULL; |
3963 | needs_recovery = 0; | |
3964 | goto no_journal; | |
ac27a0ec DK |
3965 | } |
3966 | ||
e2b911c5 | 3967 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
3968 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3969 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3970 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3971 | goto failed_mount_wq; |
eb40a09c JS |
3972 | } |
3973 | ||
25ed6e8a DW |
3974 | if (!set_journal_csum_feature_set(sb)) { |
3975 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3976 | "feature set"); | |
3977 | goto failed_mount_wq; | |
d4da6c9c | 3978 | } |
818d276c | 3979 | |
ac27a0ec DK |
3980 | /* We have now updated the journal if required, so we can |
3981 | * validate the data journaling mode. */ | |
3982 | switch (test_opt(sb, DATA_FLAGS)) { | |
3983 | case 0: | |
3984 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3985 | * capabilities: ORDERED_DATA if the journal can |
3986 | * cope, else JOURNAL_DATA | |
3987 | */ | |
dab291af MC |
3988 | if (jbd2_journal_check_available_features |
3989 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3990 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3991 | else |
fd8c37ec | 3992 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3993 | break; |
3994 | ||
617ba13b MC |
3995 | case EXT4_MOUNT_ORDERED_DATA: |
3996 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3997 | if (!jbd2_journal_check_available_features |
3998 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3999 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
4000 | "requested data journaling mode"); | |
744692dc | 4001 | goto failed_mount_wq; |
ac27a0ec DK |
4002 | } |
4003 | default: | |
4004 | break; | |
4005 | } | |
ab04df78 JK |
4006 | |
4007 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && | |
4008 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4009 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4010 | "journal_async_commit in data=ordered mode"); | |
4011 | goto failed_mount_wq; | |
4012 | } | |
4013 | ||
b3881f74 | 4014 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 4015 | |
18aadd47 BJ |
4016 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
4017 | ||
ce7e010a | 4018 | no_journal: |
2335d05f AG |
4019 | sbi->s_mb_cache = ext4_xattr_create_cache(); |
4020 | if (!sbi->s_mb_cache) { | |
4021 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); | |
4022 | goto failed_mount_wq; | |
9c191f70 M |
4023 | } |
4024 | ||
e2b911c5 | 4025 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
09cbfeaf | 4026 | (blocksize != PAGE_SIZE)) { |
1cb767cd TT |
4027 | ext4_msg(sb, KERN_ERR, |
4028 | "Unsupported blocksize for fs encryption"); | |
4029 | goto failed_mount_wq; | |
4030 | } | |
4031 | ||
e2b911c5 DW |
4032 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
4033 | !ext4_has_feature_encrypt(sb)) { | |
4034 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
4035 | ext4_commit_super(sb, 1); |
4036 | } | |
4037 | ||
952fc18e TT |
4038 | /* |
4039 | * Get the # of file system overhead blocks from the | |
4040 | * superblock if present. | |
4041 | */ | |
4042 | if (es->s_overhead_clusters) | |
4043 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
4044 | else { | |
07aa2ea1 LC |
4045 | err = ext4_calculate_overhead(sb); |
4046 | if (err) | |
952fc18e TT |
4047 | goto failed_mount_wq; |
4048 | } | |
4049 | ||
fd89d5f2 TH |
4050 | /* |
4051 | * The maximum number of concurrent works can be high and | |
4052 | * concurrency isn't really necessary. Limit it to 1. | |
4053 | */ | |
2e8fa54e JK |
4054 | EXT4_SB(sb)->rsv_conversion_wq = |
4055 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
4056 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
4057 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 4058 | ret = -ENOMEM; |
2e8fa54e JK |
4059 | goto failed_mount4; |
4060 | } | |
4061 | ||
ac27a0ec | 4062 | /* |
dab291af | 4063 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
4064 | * so we can safely mount the rest of the filesystem now. |
4065 | */ | |
4066 | ||
1d1fe1ee DH |
4067 | root = ext4_iget(sb, EXT4_ROOT_INO); |
4068 | if (IS_ERR(root)) { | |
b31e1552 | 4069 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 4070 | ret = PTR_ERR(root); |
32a9bb57 | 4071 | root = NULL; |
ac27a0ec DK |
4072 | goto failed_mount4; |
4073 | } | |
4074 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4075 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4076 | iput(root); |
ac27a0ec DK |
4077 | goto failed_mount4; |
4078 | } | |
48fde701 | 4079 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4080 | if (!sb->s_root) { |
b31e1552 | 4081 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4082 | ret = -ENOMEM; |
4083 | goto failed_mount4; | |
4084 | } | |
ac27a0ec | 4085 | |
7e84b621 ES |
4086 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
4087 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
4088 | |
4089 | /* determine the minimum size of new large inodes, if present */ | |
4090 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
4091 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4092 | EXT4_GOOD_OLD_INODE_SIZE; | |
e2b911c5 | 4093 | if (ext4_has_feature_extra_isize(sb)) { |
ef7f3835 KS |
4094 | if (sbi->s_want_extra_isize < |
4095 | le16_to_cpu(es->s_want_extra_isize)) | |
4096 | sbi->s_want_extra_isize = | |
4097 | le16_to_cpu(es->s_want_extra_isize); | |
4098 | if (sbi->s_want_extra_isize < | |
4099 | le16_to_cpu(es->s_min_extra_isize)) | |
4100 | sbi->s_want_extra_isize = | |
4101 | le16_to_cpu(es->s_min_extra_isize); | |
4102 | } | |
4103 | } | |
4104 | /* Check if enough inode space is available */ | |
4105 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
4106 | sbi->s_inode_size) { | |
4107 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4108 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
4109 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
4110 | "available"); | |
ef7f3835 KS |
4111 | } |
4112 | ||
b5799018 | 4113 | ext4_set_resv_clusters(sb); |
27dd4385 | 4114 | |
6fd058f7 TT |
4115 | err = ext4_setup_system_zone(sb); |
4116 | if (err) { | |
b31e1552 | 4117 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4118 | "zone (%d)", err); |
f9ae9cf5 TT |
4119 | goto failed_mount4a; |
4120 | } | |
4121 | ||
4122 | ext4_ext_init(sb); | |
4123 | err = ext4_mb_init(sb); | |
4124 | if (err) { | |
4125 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
4126 | err); | |
dcf2d804 | 4127 | goto failed_mount5; |
c2774d84 AK |
4128 | } |
4129 | ||
d5e03cbb TT |
4130 | block = ext4_count_free_clusters(sb); |
4131 | ext4_free_blocks_count_set(sbi->s_es, | |
4132 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
4133 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
4134 | GFP_KERNEL); | |
d5e03cbb TT |
4135 | if (!err) { |
4136 | unsigned long freei = ext4_count_free_inodes(sb); | |
4137 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
4138 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
4139 | GFP_KERNEL); | |
d5e03cbb TT |
4140 | } |
4141 | if (!err) | |
4142 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 4143 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 4144 | if (!err) |
908c7f19 TH |
4145 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
4146 | GFP_KERNEL); | |
c8585c6f DJ |
4147 | if (!err) |
4148 | err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); | |
4149 | ||
d5e03cbb TT |
4150 | if (err) { |
4151 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
4152 | goto failed_mount6; | |
4153 | } | |
4154 | ||
e2b911c5 | 4155 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
4156 | if (!ext4_fill_flex_info(sb)) { |
4157 | ext4_msg(sb, KERN_ERR, | |
4158 | "unable to initialize " | |
4159 | "flex_bg meta info!"); | |
4160 | goto failed_mount6; | |
4161 | } | |
4162 | ||
bfff6873 LC |
4163 | err = ext4_register_li_request(sb, first_not_zeroed); |
4164 | if (err) | |
dcf2d804 | 4165 | goto failed_mount6; |
bfff6873 | 4166 | |
b5799018 | 4167 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
4168 | if (err) |
4169 | goto failed_mount7; | |
3197ebdb | 4170 | |
9b2ff357 JK |
4171 | #ifdef CONFIG_QUOTA |
4172 | /* Enable quota usage during mount. */ | |
e2b911c5 | 4173 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
9b2ff357 JK |
4174 | err = ext4_enable_quotas(sb); |
4175 | if (err) | |
4176 | goto failed_mount8; | |
4177 | } | |
4178 | #endif /* CONFIG_QUOTA */ | |
4179 | ||
617ba13b MC |
4180 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4181 | ext4_orphan_cleanup(sb, es); | |
4182 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4183 | if (needs_recovery) { |
b31e1552 | 4184 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4185 | ext4_mark_recovery_complete(sb, es); |
4186 | } | |
4187 | if (EXT4_SB(sb)->s_journal) { | |
4188 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4189 | descr = " journalled data mode"; | |
4190 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4191 | descr = " ordered data mode"; | |
4192 | else | |
4193 | descr = " writeback data mode"; | |
4194 | } else | |
4195 | descr = "out journal"; | |
4196 | ||
79add3a3 LC |
4197 | if (test_opt(sb, DISCARD)) { |
4198 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4199 | if (!blk_queue_discard(q)) | |
4200 | ext4_msg(sb, KERN_WARNING, | |
4201 | "mounting with \"discard\" option, but " | |
4202 | "the device does not support discard"); | |
4203 | } | |
4204 | ||
e294a537 TT |
4205 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
4206 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
5aee0f8a TT |
4207 | "Opts: %.*s%s%s", descr, |
4208 | (int) sizeof(sbi->s_es->s_mount_opts), | |
4209 | sbi->s_es->s_mount_opts, | |
e294a537 | 4210 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
ac27a0ec | 4211 | |
66e61a9e TT |
4212 | if (es->s_error_count) |
4213 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4214 | |
efbed4dc TT |
4215 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
4216 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
4217 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
4218 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
4219 | ||
d4c402d9 | 4220 | kfree(orig_data); |
a7550b30 JK |
4221 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
4222 | memcpy(sbi->key_prefix, EXT4_KEY_DESC_PREFIX, | |
4223 | EXT4_KEY_DESC_PREFIX_SIZE); | |
4224 | sbi->key_prefix_size = EXT4_KEY_DESC_PREFIX_SIZE; | |
4225 | #endif | |
ac27a0ec DK |
4226 | return 0; |
4227 | ||
617ba13b | 4228 | cantfind_ext4: |
ac27a0ec | 4229 | if (!silent) |
b31e1552 | 4230 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4231 | goto failed_mount; |
4232 | ||
72ba7450 TT |
4233 | #ifdef CONFIG_QUOTA |
4234 | failed_mount8: | |
ebd173be | 4235 | ext4_unregister_sysfs(sb); |
72ba7450 | 4236 | #endif |
dcf2d804 TM |
4237 | failed_mount7: |
4238 | ext4_unregister_li_request(sb); | |
4239 | failed_mount6: | |
f9ae9cf5 | 4240 | ext4_mb_release(sb); |
d5e03cbb | 4241 | if (sbi->s_flex_groups) |
b93b41d4 | 4242 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4243 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4244 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4245 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4246 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4247 | failed_mount5: |
f9ae9cf5 TT |
4248 | ext4_ext_release(sb); |
4249 | ext4_release_system_zone(sb); | |
4250 | failed_mount4a: | |
94bf608a | 4251 | dput(sb->s_root); |
32a9bb57 | 4252 | sb->s_root = NULL; |
94bf608a | 4253 | failed_mount4: |
b31e1552 | 4254 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4255 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4256 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4257 | failed_mount_wq: |
82939d79 JK |
4258 | if (sbi->s_mb_cache) { |
4259 | ext4_xattr_destroy_cache(sbi->s_mb_cache); | |
4260 | sbi->s_mb_cache = NULL; | |
4261 | } | |
0390131b FM |
4262 | if (sbi->s_journal) { |
4263 | jbd2_journal_destroy(sbi->s_journal); | |
4264 | sbi->s_journal = NULL; | |
4265 | } | |
50460fe8 | 4266 | failed_mount3a: |
d3922a77 | 4267 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4268 | failed_mount3: |
9105bb14 | 4269 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4270 | if (sbi->s_mmp_tsk) |
4271 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4272 | failed_mount2: |
4273 | for (i = 0; i < db_count; i++) | |
4274 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4275 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4276 | failed_mount: |
0441984a DW |
4277 | if (sbi->s_chksum_driver) |
4278 | crypto_free_shash(sbi->s_chksum_driver); | |
ac27a0ec | 4279 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4280 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4281 | kfree(sbi->s_qf_names[i]); |
4282 | #endif | |
617ba13b | 4283 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4284 | brelse(bh); |
4285 | out_fail: | |
4286 | sb->s_fs_info = NULL; | |
f6830165 | 4287 | kfree(sbi->s_blockgroup_lock); |
5aee0f8a | 4288 | out_free_base: |
ac27a0ec | 4289 | kfree(sbi); |
d4c402d9 | 4290 | kfree(orig_data); |
07aa2ea1 | 4291 | return err ? err : ret; |
ac27a0ec DK |
4292 | } |
4293 | ||
4294 | /* | |
4295 | * Setup any per-fs journal parameters now. We'll do this both on | |
4296 | * initial mount, once the journal has been initialised but before we've | |
4297 | * done any recovery; and again on any subsequent remount. | |
4298 | */ | |
617ba13b | 4299 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4300 | { |
617ba13b | 4301 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4302 | |
30773840 TT |
4303 | journal->j_commit_interval = sbi->s_commit_interval; |
4304 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4305 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4306 | |
a931da6a | 4307 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4308 | if (test_opt(sb, BARRIER)) |
dab291af | 4309 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4310 | else |
dab291af | 4311 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4312 | if (test_opt(sb, DATA_ERR_ABORT)) |
4313 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4314 | else | |
4315 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4316 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4317 | } |
4318 | ||
c6cb7e77 EW |
4319 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
4320 | unsigned int journal_inum) | |
ac27a0ec DK |
4321 | { |
4322 | struct inode *journal_inode; | |
ac27a0ec | 4323 | |
c6cb7e77 EW |
4324 | /* |
4325 | * Test for the existence of a valid inode on disk. Bad things | |
4326 | * happen if we iget() an unused inode, as the subsequent iput() | |
4327 | * will try to delete it. | |
4328 | */ | |
1d1fe1ee DH |
4329 | journal_inode = ext4_iget(sb, journal_inum); |
4330 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4331 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4332 | return NULL; |
4333 | } | |
4334 | if (!journal_inode->i_nlink) { | |
4335 | make_bad_inode(journal_inode); | |
4336 | iput(journal_inode); | |
b31e1552 | 4337 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4338 | return NULL; |
4339 | } | |
4340 | ||
e5f8eab8 | 4341 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4342 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4343 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4344 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4345 | iput(journal_inode); |
4346 | return NULL; | |
4347 | } | |
c6cb7e77 EW |
4348 | return journal_inode; |
4349 | } | |
4350 | ||
4351 | static journal_t *ext4_get_journal(struct super_block *sb, | |
4352 | unsigned int journal_inum) | |
4353 | { | |
4354 | struct inode *journal_inode; | |
4355 | journal_t *journal; | |
4356 | ||
4357 | BUG_ON(!ext4_has_feature_journal(sb)); | |
4358 | ||
4359 | journal_inode = ext4_get_journal_inode(sb, journal_inum); | |
4360 | if (!journal_inode) | |
4361 | return NULL; | |
ac27a0ec | 4362 | |
dab291af | 4363 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4364 | if (!journal) { |
b31e1552 | 4365 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4366 | iput(journal_inode); |
4367 | return NULL; | |
4368 | } | |
4369 | journal->j_private = sb; | |
617ba13b | 4370 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4371 | return journal; |
4372 | } | |
4373 | ||
617ba13b | 4374 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4375 | dev_t j_dev) |
4376 | { | |
2b2d6d01 | 4377 | struct buffer_head *bh; |
ac27a0ec | 4378 | journal_t *journal; |
617ba13b MC |
4379 | ext4_fsblk_t start; |
4380 | ext4_fsblk_t len; | |
ac27a0ec | 4381 | int hblock, blocksize; |
617ba13b | 4382 | ext4_fsblk_t sb_block; |
ac27a0ec | 4383 | unsigned long offset; |
2b2d6d01 | 4384 | struct ext4_super_block *es; |
ac27a0ec DK |
4385 | struct block_device *bdev; |
4386 | ||
e2b911c5 | 4387 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4388 | |
b31e1552 | 4389 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4390 | if (bdev == NULL) |
4391 | return NULL; | |
4392 | ||
ac27a0ec | 4393 | blocksize = sb->s_blocksize; |
e1defc4f | 4394 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4395 | if (blocksize < hblock) { |
b31e1552 ES |
4396 | ext4_msg(sb, KERN_ERR, |
4397 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4398 | goto out_bdev; |
4399 | } | |
4400 | ||
617ba13b MC |
4401 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4402 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4403 | set_blocksize(bdev, blocksize); |
4404 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4405 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4406 | "external journal"); | |
ac27a0ec DK |
4407 | goto out_bdev; |
4408 | } | |
4409 | ||
2716b802 | 4410 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4411 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4412 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4413 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4414 | ext4_msg(sb, KERN_ERR, "external journal has " |
4415 | "bad superblock"); | |
ac27a0ec DK |
4416 | brelse(bh); |
4417 | goto out_bdev; | |
4418 | } | |
4419 | ||
df4763be DW |
4420 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4421 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4422 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4423 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4424 | "corrupt superblock"); | |
4425 | brelse(bh); | |
4426 | goto out_bdev; | |
4427 | } | |
4428 | ||
617ba13b | 4429 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4430 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4431 | brelse(bh); |
4432 | goto out_bdev; | |
4433 | } | |
4434 | ||
bd81d8ee | 4435 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4436 | start = sb_block + 1; |
4437 | brelse(bh); /* we're done with the superblock */ | |
4438 | ||
dab291af | 4439 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4440 | start, len, blocksize); |
4441 | if (!journal) { | |
b31e1552 | 4442 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4443 | goto out_bdev; |
4444 | } | |
4445 | journal->j_private = sb; | |
dfec8a14 | 4446 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4447 | wait_on_buffer(journal->j_sb_buffer); |
4448 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4449 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4450 | goto out_journal; |
4451 | } | |
4452 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4453 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4454 | "user (unsupported) - %d", | |
ac27a0ec DK |
4455 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4456 | goto out_journal; | |
4457 | } | |
617ba13b MC |
4458 | EXT4_SB(sb)->journal_bdev = bdev; |
4459 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4460 | return journal; |
0b8e58a1 | 4461 | |
ac27a0ec | 4462 | out_journal: |
dab291af | 4463 | jbd2_journal_destroy(journal); |
ac27a0ec | 4464 | out_bdev: |
617ba13b | 4465 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4466 | return NULL; |
4467 | } | |
4468 | ||
617ba13b MC |
4469 | static int ext4_load_journal(struct super_block *sb, |
4470 | struct ext4_super_block *es, | |
ac27a0ec DK |
4471 | unsigned long journal_devnum) |
4472 | { | |
4473 | journal_t *journal; | |
4474 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4475 | dev_t journal_dev; | |
4476 | int err = 0; | |
4477 | int really_read_only; | |
4478 | ||
e2b911c5 | 4479 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4480 | |
ac27a0ec DK |
4481 | if (journal_devnum && |
4482 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4483 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4484 | "numbers have changed"); | |
ac27a0ec DK |
4485 | journal_dev = new_decode_dev(journal_devnum); |
4486 | } else | |
4487 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4488 | ||
4489 | really_read_only = bdev_read_only(sb->s_bdev); | |
4490 | ||
4491 | /* | |
4492 | * Are we loading a blank journal or performing recovery after a | |
4493 | * crash? For recovery, we need to check in advance whether we | |
4494 | * can get read-write access to the device. | |
4495 | */ | |
e2b911c5 | 4496 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
ac27a0ec | 4497 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4498 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4499 | "required on readonly filesystem"); | |
ac27a0ec | 4500 | if (really_read_only) { |
b31e1552 ES |
4501 | ext4_msg(sb, KERN_ERR, "write access " |
4502 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4503 | return -EROFS; |
4504 | } | |
b31e1552 ES |
4505 | ext4_msg(sb, KERN_INFO, "write access will " |
4506 | "be enabled during recovery"); | |
ac27a0ec DK |
4507 | } |
4508 | } | |
4509 | ||
4510 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4511 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4512 | "and inode journals!"); | |
ac27a0ec DK |
4513 | return -EINVAL; |
4514 | } | |
4515 | ||
4516 | if (journal_inum) { | |
617ba13b | 4517 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4518 | return -EINVAL; |
4519 | } else { | |
617ba13b | 4520 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4521 | return -EINVAL; |
4522 | } | |
4523 | ||
90576c0b | 4524 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4525 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4526 | |
e2b911c5 | 4527 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4528 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4529 | if (!err) { |
4530 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4531 | if (save) | |
4532 | memcpy(save, ((char *) es) + | |
4533 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4534 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4535 | if (save) |
4536 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4537 | save, EXT4_S_ERR_LEN); | |
4538 | kfree(save); | |
4539 | } | |
ac27a0ec DK |
4540 | |
4541 | if (err) { | |
b31e1552 | 4542 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4543 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4544 | return err; |
4545 | } | |
4546 | ||
617ba13b MC |
4547 | EXT4_SB(sb)->s_journal = journal; |
4548 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4549 | |
c41303ce | 4550 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4551 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4552 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4553 | |
4554 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4555 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4556 | } |
4557 | ||
4558 | return 0; | |
4559 | } | |
4560 | ||
e2d67052 | 4561 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4562 | { |
e2d67052 | 4563 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4564 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4565 | int error = 0; |
ac27a0ec | 4566 | |
bdfe0cbd | 4567 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4568 | return error; |
71290b36 TT |
4569 | /* |
4570 | * If the file system is mounted read-only, don't update the | |
4571 | * superblock write time. This avoids updating the superblock | |
4572 | * write time when we are mounting the root file system | |
4573 | * read/only but we need to replay the journal; at that point, | |
4574 | * for people who are east of GMT and who make their clock | |
4575 | * tick in localtime for Windows bug-for-bug compatibility, | |
4576 | * the clock is set in the future, and this will cause e2fsck | |
4577 | * to complain and force a full file system check. | |
4578 | */ | |
4579 | if (!(sb->s_flags & MS_RDONLY)) | |
4580 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4581 | if (sb->s_bdev->bd_part) |
4582 | es->s_kbytes_written = | |
4583 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4584 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4585 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4586 | else |
4587 | es->s_kbytes_written = | |
4588 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4589 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4590 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4591 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4592 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4593 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4594 | es->s_free_inodes_count = | |
4595 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4596 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4597 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4598 | ext4_superblock_csum_set(sb); |
1566a48a TT |
4599 | if (sync) |
4600 | lock_buffer(sbh); | |
4743f839 PKS |
4601 | if (buffer_write_io_error(sbh)) { |
4602 | /* | |
4603 | * Oh, dear. A previous attempt to write the | |
4604 | * superblock failed. This could happen because the | |
4605 | * USB device was yanked out. Or it could happen to | |
4606 | * be a transient write error and maybe the block will | |
4607 | * be remapped. Nothing we can do but to retry the | |
4608 | * write and hope for the best. | |
4609 | */ | |
4610 | ext4_msg(sb, KERN_ERR, "previous I/O error to " | |
4611 | "superblock detected"); | |
4612 | clear_buffer_write_io_error(sbh); | |
4613 | set_buffer_uptodate(sbh); | |
4614 | } | |
ac27a0ec | 4615 | mark_buffer_dirty(sbh); |
914258bf | 4616 | if (sync) { |
1566a48a | 4617 | unlock_buffer(sbh); |
564bc402 | 4618 | error = __sync_dirty_buffer(sbh, |
70fd7614 | 4619 | test_opt(sb, BARRIER) ? REQ_FUA : REQ_SYNC); |
c4be0c1d TS |
4620 | if (error) |
4621 | return error; | |
4622 | ||
4623 | error = buffer_write_io_error(sbh); | |
4624 | if (error) { | |
b31e1552 ES |
4625 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4626 | "superblock"); | |
914258bf TT |
4627 | clear_buffer_write_io_error(sbh); |
4628 | set_buffer_uptodate(sbh); | |
4629 | } | |
4630 | } | |
c4be0c1d | 4631 | return error; |
ac27a0ec DK |
4632 | } |
4633 | ||
ac27a0ec DK |
4634 | /* |
4635 | * Have we just finished recovery? If so, and if we are mounting (or | |
4636 | * remounting) the filesystem readonly, then we will end up with a | |
4637 | * consistent fs on disk. Record that fact. | |
4638 | */ | |
2b2d6d01 TT |
4639 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4640 | struct ext4_super_block *es) | |
ac27a0ec | 4641 | { |
617ba13b | 4642 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4643 | |
e2b911c5 | 4644 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
4645 | BUG_ON(journal != NULL); |
4646 | return; | |
4647 | } | |
dab291af | 4648 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4649 | if (jbd2_journal_flush(journal) < 0) |
4650 | goto out; | |
4651 | ||
e2b911c5 | 4652 | if (ext4_has_feature_journal_needs_recovery(sb) && |
ac27a0ec | 4653 | sb->s_flags & MS_RDONLY) { |
e2b911c5 | 4654 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 4655 | ext4_commit_super(sb, 1); |
ac27a0ec | 4656 | } |
7ffe1ea8 HK |
4657 | |
4658 | out: | |
dab291af | 4659 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4660 | } |
4661 | ||
4662 | /* | |
4663 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4664 | * has recorded an error from a previous lifetime, move that error to the | |
4665 | * main filesystem now. | |
4666 | */ | |
2b2d6d01 TT |
4667 | static void ext4_clear_journal_err(struct super_block *sb, |
4668 | struct ext4_super_block *es) | |
ac27a0ec DK |
4669 | { |
4670 | journal_t *journal; | |
4671 | int j_errno; | |
4672 | const char *errstr; | |
4673 | ||
e2b911c5 | 4674 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4675 | |
617ba13b | 4676 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4677 | |
4678 | /* | |
4679 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4680 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4681 | */ |
4682 | ||
dab291af | 4683 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4684 | if (j_errno) { |
4685 | char nbuf[16]; | |
4686 | ||
617ba13b | 4687 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4688 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4689 | "from previous mount: %s", errstr); |
12062ddd | 4690 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4691 | |
617ba13b MC |
4692 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4693 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4694 | ext4_commit_super(sb, 1); |
ac27a0ec | 4695 | |
dab291af | 4696 | jbd2_journal_clear_err(journal); |
d796c52e | 4697 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4698 | } |
4699 | } | |
4700 | ||
4701 | /* | |
4702 | * Force the running and committing transactions to commit, | |
4703 | * and wait on the commit. | |
4704 | */ | |
617ba13b | 4705 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4706 | { |
4707 | journal_t *journal; | |
ac27a0ec DK |
4708 | |
4709 | if (sb->s_flags & MS_RDONLY) | |
4710 | return 0; | |
4711 | ||
617ba13b | 4712 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4713 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4714 | } |
4715 | ||
617ba13b | 4716 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4717 | { |
14ce0cb4 | 4718 | int ret = 0; |
9eddacf9 | 4719 | tid_t target; |
06a407f1 | 4720 | bool needs_barrier = false; |
8d5d02e6 | 4721 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4722 | |
9bffad1e | 4723 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4724 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4725 | /* |
4726 | * Writeback quota in non-journalled quota case - journalled quota has | |
4727 | * no dirty dquots | |
4728 | */ | |
4729 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4730 | /* |
4731 | * Data writeback is possible w/o journal transaction, so barrier must | |
4732 | * being sent at the end of the function. But we can skip it if | |
4733 | * transaction_commit will do it for us. | |
4734 | */ | |
bda32530 TT |
4735 | if (sbi->s_journal) { |
4736 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4737 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4738 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4739 | needs_barrier = true; | |
4740 | ||
4741 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4742 | if (wait) | |
4743 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4744 | target); | |
4745 | } | |
4746 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4747 | needs_barrier = true; |
06a407f1 DM |
4748 | if (needs_barrier) { |
4749 | int err; | |
4750 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4751 | if (!ret) | |
4752 | ret = err; | |
0390131b | 4753 | } |
06a407f1 DM |
4754 | |
4755 | return ret; | |
4756 | } | |
4757 | ||
ac27a0ec DK |
4758 | /* |
4759 | * LVM calls this function before a (read-only) snapshot is created. This | |
4760 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4761 | * |
4762 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4763 | * state independently. It relies on upper layer to stop all data & metadata |
4764 | * modifications. | |
ac27a0ec | 4765 | */ |
c4be0c1d | 4766 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4767 | { |
c4be0c1d TS |
4768 | int error = 0; |
4769 | journal_t *journal; | |
ac27a0ec | 4770 | |
9ca92389 TT |
4771 | if (sb->s_flags & MS_RDONLY) |
4772 | return 0; | |
ac27a0ec | 4773 | |
9ca92389 | 4774 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4775 | |
bb044576 TT |
4776 | if (journal) { |
4777 | /* Now we set up the journal barrier. */ | |
4778 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4779 | |
bb044576 TT |
4780 | /* |
4781 | * Don't clear the needs_recovery flag if we failed to | |
4782 | * flush the journal. | |
4783 | */ | |
4784 | error = jbd2_journal_flush(journal); | |
4785 | if (error < 0) | |
4786 | goto out; | |
c642dc9e ES |
4787 | |
4788 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 4789 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 4790 | } |
9ca92389 | 4791 | |
9ca92389 | 4792 | error = ext4_commit_super(sb, 1); |
6b0310fb | 4793 | out: |
bb044576 TT |
4794 | if (journal) |
4795 | /* we rely on upper layer to stop further updates */ | |
4796 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4797 | return error; |
ac27a0ec DK |
4798 | } |
4799 | ||
4800 | /* | |
4801 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4802 | * flag here, even though the filesystem is not technically dirty yet. | |
4803 | */ | |
c4be0c1d | 4804 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4805 | { |
9ca92389 TT |
4806 | if (sb->s_flags & MS_RDONLY) |
4807 | return 0; | |
4808 | ||
c642dc9e ES |
4809 | if (EXT4_SB(sb)->s_journal) { |
4810 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 4811 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
4812 | } |
4813 | ||
9ca92389 | 4814 | ext4_commit_super(sb, 1); |
c4be0c1d | 4815 | return 0; |
ac27a0ec DK |
4816 | } |
4817 | ||
673c6100 TT |
4818 | /* |
4819 | * Structure to save mount options for ext4_remount's benefit | |
4820 | */ | |
4821 | struct ext4_mount_options { | |
4822 | unsigned long s_mount_opt; | |
a2595b8a | 4823 | unsigned long s_mount_opt2; |
08cefc7a EB |
4824 | kuid_t s_resuid; |
4825 | kgid_t s_resgid; | |
673c6100 TT |
4826 | unsigned long s_commit_interval; |
4827 | u32 s_min_batch_time, s_max_batch_time; | |
4828 | #ifdef CONFIG_QUOTA | |
4829 | int s_jquota_fmt; | |
a2d4a646 | 4830 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4831 | #endif |
4832 | }; | |
4833 | ||
2b2d6d01 | 4834 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4835 | { |
2b2d6d01 | 4836 | struct ext4_super_block *es; |
617ba13b | 4837 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4838 | unsigned long old_sb_flags; |
617ba13b | 4839 | struct ext4_mount_options old_opts; |
c79d967d | 4840 | int enable_quota = 0; |
8a266467 | 4841 | ext4_group_t g; |
b3881f74 | 4842 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4843 | int err = 0; |
ac27a0ec | 4844 | #ifdef CONFIG_QUOTA |
03dafb5f | 4845 | int i, j; |
ac27a0ec | 4846 | #endif |
d4c402d9 | 4847 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4848 | |
4849 | /* Store the original options */ | |
4850 | old_sb_flags = sb->s_flags; | |
4851 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4852 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4853 | old_opts.s_resuid = sbi->s_resuid; |
4854 | old_opts.s_resgid = sbi->s_resgid; | |
4855 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4856 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4857 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4858 | #ifdef CONFIG_QUOTA |
4859 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 4860 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
4861 | if (sbi->s_qf_names[i]) { |
4862 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4863 | GFP_KERNEL); | |
4864 | if (!old_opts.s_qf_names[i]) { | |
4865 | for (j = 0; j < i; j++) | |
4866 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4867 | kfree(orig_data); |
03dafb5f CG |
4868 | return -ENOMEM; |
4869 | } | |
4870 | } else | |
4871 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4872 | #endif |
b3881f74 TT |
4873 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4874 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 4875 | |
661aa520 | 4876 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4877 | err = -EINVAL; |
4878 | goto restore_opts; | |
4879 | } | |
4880 | ||
6b992ff2 | 4881 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
4882 | test_opt(sb, JOURNAL_CHECKSUM)) { |
4883 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
4884 | "during remount not supported; ignoring"); |
4885 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
4886 | } |
4887 | ||
6ae6514b PS |
4888 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4889 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4890 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4891 | "both data=journal and delalloc"); | |
4892 | err = -EINVAL; | |
4893 | goto restore_opts; | |
4894 | } | |
4895 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4896 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4897 | "both data=journal and dioread_nolock"); | |
4898 | err = -EINVAL; | |
4899 | goto restore_opts; | |
4900 | } | |
923ae0ff RZ |
4901 | if (test_opt(sb, DAX)) { |
4902 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4903 | "both data=journal and dax"); | |
4904 | err = -EINVAL; | |
4905 | goto restore_opts; | |
4906 | } | |
ab04df78 JK |
4907 | } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { |
4908 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4909 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4910 | "journal_async_commit in data=ordered mode"); | |
4911 | err = -EINVAL; | |
4912 | goto restore_opts; | |
4913 | } | |
923ae0ff RZ |
4914 | } |
4915 | ||
4916 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { | |
4917 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
4918 | "dax flag with busy inodes while remounting"); | |
4919 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
4920 | } |
4921 | ||
4ab2f15b | 4922 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4923 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4924 | |
4925 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4926 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4927 | |
4928 | es = sbi->s_es; | |
4929 | ||
b3881f74 | 4930 | if (sbi->s_journal) { |
0390131b | 4931 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4932 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4933 | } | |
ac27a0ec | 4934 | |
a2fd66d0 TT |
4935 | if (*flags & MS_LAZYTIME) |
4936 | sb->s_flags |= MS_LAZYTIME; | |
4937 | ||
661aa520 | 4938 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4939 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4940 | err = -EROFS; |
4941 | goto restore_opts; | |
4942 | } | |
4943 | ||
4944 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
4945 | err = sync_filesystem(sb); |
4946 | if (err < 0) | |
4947 | goto restore_opts; | |
0f0dd62f CH |
4948 | err = dquot_suspend(sb, -1); |
4949 | if (err < 0) | |
c79d967d | 4950 | goto restore_opts; |
c79d967d | 4951 | |
ac27a0ec DK |
4952 | /* |
4953 | * First of all, the unconditional stuff we have to do | |
4954 | * to disable replay of the journal when we next remount | |
4955 | */ | |
4956 | sb->s_flags |= MS_RDONLY; | |
4957 | ||
4958 | /* | |
4959 | * OK, test if we are remounting a valid rw partition | |
4960 | * readonly, and if so set the rdonly flag and then | |
4961 | * mark the partition as valid again. | |
4962 | */ | |
617ba13b MC |
4963 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4964 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4965 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4966 | ||
a63c9eb2 | 4967 | if (sbi->s_journal) |
0390131b | 4968 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4969 | } else { |
a13fb1a4 | 4970 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 4971 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 4972 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
4973 | err = -EROFS; |
4974 | goto restore_opts; | |
4975 | } | |
8a266467 TT |
4976 | /* |
4977 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4978 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4979 | */ |
4980 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4981 | struct ext4_group_desc *gdp = | |
4982 | ext4_get_group_desc(sb, g, NULL); | |
4983 | ||
feb0ab32 | 4984 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4985 | ext4_msg(sb, KERN_ERR, |
4986 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 4987 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 4988 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 4989 | err = -EFSBADCRC; |
8a266467 TT |
4990 | goto restore_opts; |
4991 | } | |
4992 | } | |
4993 | ||
ead6596b ES |
4994 | /* |
4995 | * If we have an unprocessed orphan list hanging | |
4996 | * around from a previously readonly bdev mount, | |
4997 | * require a full umount/remount for now. | |
4998 | */ | |
4999 | if (es->s_last_orphan) { | |
b31e1552 | 5000 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
5001 | "remount RDWR because of unprocessed " |
5002 | "orphan inode list. Please " | |
b31e1552 | 5003 | "umount/remount instead"); |
ead6596b ES |
5004 | err = -EINVAL; |
5005 | goto restore_opts; | |
5006 | } | |
5007 | ||
ac27a0ec DK |
5008 | /* |
5009 | * Mounting a RDONLY partition read-write, so reread | |
5010 | * and store the current valid flag. (It may have | |
5011 | * been changed by e2fsck since we originally mounted | |
5012 | * the partition.) | |
5013 | */ | |
0390131b FM |
5014 | if (sbi->s_journal) |
5015 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 5016 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 5017 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 5018 | sb->s_flags &= ~MS_RDONLY; |
e2b911c5 | 5019 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
5020 | if (ext4_multi_mount_protect(sb, |
5021 | le64_to_cpu(es->s_mmp_block))) { | |
5022 | err = -EROFS; | |
5023 | goto restore_opts; | |
5024 | } | |
c79d967d | 5025 | enable_quota = 1; |
ac27a0ec DK |
5026 | } |
5027 | } | |
bfff6873 LC |
5028 | |
5029 | /* | |
5030 | * Reinitialize lazy itable initialization thread based on | |
5031 | * current settings | |
5032 | */ | |
5033 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
5034 | ext4_unregister_li_request(sb); | |
5035 | else { | |
5036 | ext4_group_t first_not_zeroed; | |
5037 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
5038 | ext4_register_li_request(sb, first_not_zeroed); | |
5039 | } | |
5040 | ||
6fd058f7 | 5041 | ext4_setup_system_zone(sb); |
d096ad0f | 5042 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 5043 | ext4_commit_super(sb, 1); |
0390131b | 5044 | |
ac27a0ec DK |
5045 | #ifdef CONFIG_QUOTA |
5046 | /* Release old quota file names */ | |
a2d4a646 | 5047 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 5048 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
5049 | if (enable_quota) { |
5050 | if (sb_any_quota_suspended(sb)) | |
5051 | dquot_resume(sb, -1); | |
e2b911c5 | 5052 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 5053 | err = ext4_enable_quotas(sb); |
07724f98 | 5054 | if (err) |
7c319d32 | 5055 | goto restore_opts; |
7c319d32 AK |
5056 | } |
5057 | } | |
ac27a0ec | 5058 | #endif |
d4c402d9 | 5059 | |
a26f4992 | 5060 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
5061 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
5062 | kfree(orig_data); | |
ac27a0ec | 5063 | return 0; |
0b8e58a1 | 5064 | |
ac27a0ec DK |
5065 | restore_opts: |
5066 | sb->s_flags = old_sb_flags; | |
5067 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 5068 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
5069 | sbi->s_resuid = old_opts.s_resuid; |
5070 | sbi->s_resgid = old_opts.s_resgid; | |
5071 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
5072 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
5073 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
5074 | #ifdef CONFIG_QUOTA |
5075 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 5076 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 5077 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
5078 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
5079 | } | |
5080 | #endif | |
d4c402d9 | 5081 | kfree(orig_data); |
ac27a0ec DK |
5082 | return err; |
5083 | } | |
5084 | ||
689c958c LX |
5085 | #ifdef CONFIG_QUOTA |
5086 | static int ext4_statfs_project(struct super_block *sb, | |
5087 | kprojid_t projid, struct kstatfs *buf) | |
5088 | { | |
5089 | struct kqid qid; | |
5090 | struct dquot *dquot; | |
5091 | u64 limit; | |
5092 | u64 curblock; | |
5093 | ||
5094 | qid = make_kqid_projid(projid); | |
5095 | dquot = dqget(sb, qid); | |
5096 | if (IS_ERR(dquot)) | |
5097 | return PTR_ERR(dquot); | |
5098 | spin_lock(&dq_data_lock); | |
5099 | ||
5100 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? | |
5101 | dquot->dq_dqb.dqb_bsoftlimit : | |
5102 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; | |
5103 | if (limit && buf->f_blocks > limit) { | |
5104 | curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; | |
5105 | buf->f_blocks = limit; | |
5106 | buf->f_bfree = buf->f_bavail = | |
5107 | (buf->f_blocks > curblock) ? | |
5108 | (buf->f_blocks - curblock) : 0; | |
5109 | } | |
5110 | ||
5111 | limit = dquot->dq_dqb.dqb_isoftlimit ? | |
5112 | dquot->dq_dqb.dqb_isoftlimit : | |
5113 | dquot->dq_dqb.dqb_ihardlimit; | |
5114 | if (limit && buf->f_files > limit) { | |
5115 | buf->f_files = limit; | |
5116 | buf->f_ffree = | |
5117 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
5118 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
5119 | } | |
5120 | ||
5121 | spin_unlock(&dq_data_lock); | |
5122 | dqput(dquot); | |
5123 | return 0; | |
5124 | } | |
5125 | #endif | |
5126 | ||
2b2d6d01 | 5127 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
5128 | { |
5129 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
5130 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
5131 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 5132 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 5133 | u64 fsid; |
d02a9391 | 5134 | s64 bfree; |
27dd4385 | 5135 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 5136 | |
952fc18e TT |
5137 | if (!test_opt(sb, MINIX_DF)) |
5138 | overhead = sbi->s_overhead; | |
ac27a0ec | 5139 | |
617ba13b | 5140 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 5141 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 5142 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
5143 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
5144 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 5145 | /* prevent underflow in case that few free space is available */ |
57042651 | 5146 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
5147 | buf->f_bavail = buf->f_bfree - |
5148 | (ext4_r_blocks_count(es) + resv_blocks); | |
5149 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
5150 | buf->f_bavail = 0; |
5151 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 5152 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 5153 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
5154 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
5155 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
5156 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
5157 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 5158 | |
689c958c LX |
5159 | #ifdef CONFIG_QUOTA |
5160 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
5161 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
5162 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
5163 | #endif | |
ac27a0ec DK |
5164 | return 0; |
5165 | } | |
5166 | ||
0b8e58a1 AD |
5167 | /* Helper function for writing quotas on sync - we need to start transaction |
5168 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 5169 | * Process 1 Process 2 |
617ba13b | 5170 | * ext4_create() quota_sync() |
a269eb18 | 5171 | * jbd2_journal_start() write_dquot() |
871a2931 | 5172 | * dquot_initialize() down(dqio_mutex) |
dab291af | 5173 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
5174 | * |
5175 | */ | |
5176 | ||
5177 | #ifdef CONFIG_QUOTA | |
5178 | ||
5179 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
5180 | { | |
4c376dca | 5181 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
5182 | } |
5183 | ||
617ba13b | 5184 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
5185 | { |
5186 | int ret, err; | |
5187 | handle_t *handle; | |
5188 | struct inode *inode; | |
5189 | ||
5190 | inode = dquot_to_inode(dquot); | |
9924a92a | 5191 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 5192 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5193 | if (IS_ERR(handle)) |
5194 | return PTR_ERR(handle); | |
5195 | ret = dquot_commit(dquot); | |
617ba13b | 5196 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5197 | if (!ret) |
5198 | ret = err; | |
5199 | return ret; | |
5200 | } | |
5201 | ||
617ba13b | 5202 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
5203 | { |
5204 | int ret, err; | |
5205 | handle_t *handle; | |
5206 | ||
9924a92a | 5207 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5208 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5209 | if (IS_ERR(handle)) |
5210 | return PTR_ERR(handle); | |
5211 | ret = dquot_acquire(dquot); | |
617ba13b | 5212 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5213 | if (!ret) |
5214 | ret = err; | |
5215 | return ret; | |
5216 | } | |
5217 | ||
617ba13b | 5218 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5219 | { |
5220 | int ret, err; | |
5221 | handle_t *handle; | |
5222 | ||
9924a92a | 5223 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5224 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5225 | if (IS_ERR(handle)) { |
5226 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5227 | dquot_release(dquot); | |
ac27a0ec | 5228 | return PTR_ERR(handle); |
9c3013e9 | 5229 | } |
ac27a0ec | 5230 | ret = dquot_release(dquot); |
617ba13b | 5231 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5232 | if (!ret) |
5233 | ret = err; | |
5234 | return ret; | |
5235 | } | |
5236 | ||
617ba13b | 5237 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5238 | { |
262b4662 JK |
5239 | struct super_block *sb = dquot->dq_sb; |
5240 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5241 | ||
2c8be6b2 | 5242 | /* Are we journaling quotas? */ |
e2b911c5 | 5243 | if (ext4_has_feature_quota(sb) || |
262b4662 | 5244 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 5245 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5246 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5247 | } else { |
5248 | return dquot_mark_dquot_dirty(dquot); | |
5249 | } | |
5250 | } | |
5251 | ||
617ba13b | 5252 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5253 | { |
5254 | int ret, err; | |
5255 | handle_t *handle; | |
5256 | ||
5257 | /* Data block + inode block */ | |
2b0143b5 | 5258 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5259 | if (IS_ERR(handle)) |
5260 | return PTR_ERR(handle); | |
5261 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5262 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5263 | if (!ret) |
5264 | ret = err; | |
5265 | return ret; | |
5266 | } | |
5267 | ||
5268 | /* | |
5269 | * Turn on quotas during mount time - we need to find | |
5270 | * the quota file and such... | |
5271 | */ | |
617ba13b | 5272 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5273 | { |
287a8095 CH |
5274 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5275 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5276 | } |
5277 | ||
daf647d2 TT |
5278 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
5279 | { | |
5280 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5281 | ||
5282 | /* The first argument of lockdep_set_subclass has to be | |
5283 | * *exactly* the same as the argument to init_rwsem() --- in | |
5284 | * this case, in init_once() --- or lockdep gets unhappy | |
5285 | * because the name of the lock is set using the | |
5286 | * stringification of the argument to init_rwsem(). | |
5287 | */ | |
5288 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ | |
5289 | lockdep_set_subclass(&ei->i_data_sem, subclass); | |
5290 | } | |
5291 | ||
ac27a0ec DK |
5292 | /* |
5293 | * Standard function to be called on quota_on | |
5294 | */ | |
617ba13b | 5295 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 5296 | const struct path *path) |
ac27a0ec DK |
5297 | { |
5298 | int err; | |
ac27a0ec DK |
5299 | |
5300 | if (!test_opt(sb, QUOTA)) | |
5301 | return -EINVAL; | |
0623543b | 5302 | |
ac27a0ec | 5303 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5304 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5305 | return -EXDEV; |
0623543b JK |
5306 | /* Journaling quota? */ |
5307 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5308 | /* Quotafile not in fs root? */ |
f00c9e44 | 5309 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5310 | ext4_msg(sb, KERN_WARNING, |
5311 | "Quota file not on filesystem root. " | |
5312 | "Journaled quota will not work"); | |
2b2d6d01 | 5313 | } |
0623543b JK |
5314 | |
5315 | /* | |
5316 | * When we journal data on quota file, we have to flush journal to see | |
5317 | * all updates to the file when we bypass pagecache... | |
5318 | */ | |
0390131b | 5319 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5320 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5321 | /* |
5322 | * We don't need to lock updates but journal_flush() could | |
5323 | * otherwise be livelocked... | |
5324 | */ | |
5325 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5326 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5327 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5328 | if (err) |
7ffe1ea8 | 5329 | return err; |
0623543b | 5330 | } |
daf647d2 TT |
5331 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
5332 | err = dquot_quota_on(sb, type, format_id, path); | |
5333 | if (err) | |
5334 | lockdep_set_quota_inode(path->dentry->d_inode, | |
5335 | I_DATA_SEM_NORMAL); | |
5336 | return err; | |
ac27a0ec DK |
5337 | } |
5338 | ||
7c319d32 AK |
5339 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5340 | unsigned int flags) | |
5341 | { | |
5342 | int err; | |
5343 | struct inode *qf_inode; | |
a2d4a646 | 5344 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5345 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5346 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5347 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5348 | }; |
5349 | ||
e2b911c5 | 5350 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5351 | |
5352 | if (!qf_inums[type]) | |
5353 | return -EPERM; | |
5354 | ||
5355 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5356 | if (IS_ERR(qf_inode)) { | |
5357 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5358 | return PTR_ERR(qf_inode); | |
5359 | } | |
5360 | ||
bcb13850 JK |
5361 | /* Don't account quota for quota files to avoid recursion */ |
5362 | qf_inode->i_flags |= S_NOQUOTA; | |
daf647d2 | 5363 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
7c319d32 AK |
5364 | err = dquot_enable(qf_inode, type, format_id, flags); |
5365 | iput(qf_inode); | |
daf647d2 TT |
5366 | if (err) |
5367 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); | |
7c319d32 AK |
5368 | |
5369 | return err; | |
5370 | } | |
5371 | ||
5372 | /* Enable usage tracking for all quota types. */ | |
5373 | static int ext4_enable_quotas(struct super_block *sb) | |
5374 | { | |
5375 | int type, err = 0; | |
a2d4a646 | 5376 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5377 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5378 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5379 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 | 5380 | }; |
49da9392 JK |
5381 | bool quota_mopt[EXT4_MAXQUOTAS] = { |
5382 | test_opt(sb, USRQUOTA), | |
5383 | test_opt(sb, GRPQUOTA), | |
5384 | test_opt(sb, PRJQUOTA), | |
5385 | }; | |
7c319d32 AK |
5386 | |
5387 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5388 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5389 | if (qf_inums[type]) { |
5390 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
49da9392 JK |
5391 | DQUOT_USAGE_ENABLED | |
5392 | (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); | |
7c319d32 AK |
5393 | if (err) { |
5394 | ext4_warning(sb, | |
72ba7450 TT |
5395 | "Failed to enable quota tracking " |
5396 | "(type=%d, err=%d). Please run " | |
5397 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5398 | return err; |
5399 | } | |
5400 | } | |
5401 | } | |
5402 | return 0; | |
5403 | } | |
5404 | ||
ca0e05e4 DM |
5405 | static int ext4_quota_off(struct super_block *sb, int type) |
5406 | { | |
21f97697 JK |
5407 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5408 | handle_t *handle; | |
5409 | ||
87009d86 DM |
5410 | /* Force all delayed allocation blocks to be allocated. |
5411 | * Caller already holds s_umount sem */ | |
5412 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5413 | sync_filesystem(sb); |
ca0e05e4 | 5414 | |
0b268590 AG |
5415 | if (!inode) |
5416 | goto out; | |
5417 | ||
21f97697 JK |
5418 | /* Update modification times of quota files when userspace can |
5419 | * start looking at them */ | |
9924a92a | 5420 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5421 | if (IS_ERR(handle)) |
5422 | goto out; | |
eeca7ea1 | 5423 | inode->i_mtime = inode->i_ctime = current_time(inode); |
21f97697 JK |
5424 | ext4_mark_inode_dirty(handle, inode); |
5425 | ext4_journal_stop(handle); | |
5426 | ||
5427 | out: | |
ca0e05e4 DM |
5428 | return dquot_quota_off(sb, type); |
5429 | } | |
5430 | ||
ac27a0ec DK |
5431 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5432 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5433 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5434 | * we don't have to be afraid of races */ |
617ba13b | 5435 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5436 | 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); |
ac27a0ec DK |
5440 | int offset = off & (sb->s_blocksize - 1); |
5441 | int tocopy; | |
5442 | size_t toread; | |
5443 | struct buffer_head *bh; | |
5444 | loff_t i_size = i_size_read(inode); | |
5445 | ||
5446 | if (off > i_size) | |
5447 | return 0; | |
5448 | if (off+len > i_size) | |
5449 | len = i_size-off; | |
5450 | toread = len; | |
5451 | while (toread > 0) { | |
5452 | tocopy = sb->s_blocksize - offset < toread ? | |
5453 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5454 | bh = ext4_bread(NULL, inode, blk, 0); |
5455 | if (IS_ERR(bh)) | |
5456 | return PTR_ERR(bh); | |
ac27a0ec DK |
5457 | if (!bh) /* A hole? */ |
5458 | memset(data, 0, tocopy); | |
5459 | else | |
5460 | memcpy(data, bh->b_data+offset, tocopy); | |
5461 | brelse(bh); | |
5462 | offset = 0; | |
5463 | toread -= tocopy; | |
5464 | data += tocopy; | |
5465 | blk++; | |
5466 | } | |
5467 | return len; | |
5468 | } | |
5469 | ||
5470 | /* Write to quotafile (we know the transaction is already started and has | |
5471 | * enough credits) */ | |
617ba13b | 5472 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5473 | const char *data, size_t len, loff_t off) |
5474 | { | |
5475 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5476 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5477 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5478 | int retries = 0; |
ac27a0ec DK |
5479 | struct buffer_head *bh; |
5480 | handle_t *handle = journal_current_handle(); | |
5481 | ||
0390131b | 5482 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5483 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5484 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5485 | (unsigned long long)off, (unsigned long long)len); |
5486 | return -EIO; | |
5487 | } | |
67eeb568 DM |
5488 | /* |
5489 | * Since we account only one data block in transaction credits, | |
5490 | * then it is impossible to cross a block boundary. | |
5491 | */ | |
5492 | if (sb->s_blocksize - offset < len) { | |
5493 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5494 | " cancelled because not block aligned", | |
5495 | (unsigned long long)off, (unsigned long long)len); | |
5496 | return -EIO; | |
5497 | } | |
5498 | ||
c5e298ae TT |
5499 | do { |
5500 | bh = ext4_bread(handle, inode, blk, | |
5501 | EXT4_GET_BLOCKS_CREATE | | |
5502 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5503 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5504 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5505 | if (IS_ERR(bh)) |
5506 | return PTR_ERR(bh); | |
67eeb568 DM |
5507 | if (!bh) |
5508 | goto out; | |
5d601255 | 5509 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5510 | err = ext4_journal_get_write_access(handle, bh); |
5511 | if (err) { | |
5512 | brelse(bh); | |
1c215028 | 5513 | return err; |
ac27a0ec | 5514 | } |
67eeb568 DM |
5515 | lock_buffer(bh); |
5516 | memcpy(bh->b_data+offset, data, len); | |
5517 | flush_dcache_page(bh->b_page); | |
5518 | unlock_buffer(bh); | |
62d2b5f2 | 5519 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5520 | brelse(bh); |
ac27a0ec | 5521 | out: |
67eeb568 DM |
5522 | if (inode->i_size < off + len) { |
5523 | i_size_write(inode, off + len); | |
617ba13b | 5524 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5525 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5526 | } |
67eeb568 | 5527 | return len; |
ac27a0ec DK |
5528 | } |
5529 | ||
8f0e8746 TT |
5530 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) |
5531 | { | |
5532 | const struct quota_format_ops *ops; | |
5533 | ||
5534 | if (!sb_has_quota_loaded(sb, qid->type)) | |
5535 | return -ESRCH; | |
5536 | ops = sb_dqopt(sb)->ops[qid->type]; | |
5537 | if (!ops || !ops->get_next_id) | |
5538 | return -ENOSYS; | |
5539 | return dquot_get_next_id(sb, qid); | |
5540 | } | |
ac27a0ec DK |
5541 | #endif |
5542 | ||
152a0836 AV |
5543 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5544 | const char *dev_name, void *data) | |
ac27a0ec | 5545 | { |
152a0836 | 5546 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5547 | } |
5548 | ||
c290ea01 | 5549 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
5550 | static inline void register_as_ext2(void) |
5551 | { | |
5552 | int err = register_filesystem(&ext2_fs_type); | |
5553 | if (err) | |
5554 | printk(KERN_WARNING | |
5555 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5556 | } | |
5557 | ||
5558 | static inline void unregister_as_ext2(void) | |
5559 | { | |
5560 | unregister_filesystem(&ext2_fs_type); | |
5561 | } | |
2035e776 TT |
5562 | |
5563 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5564 | { | |
e2b911c5 | 5565 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 TT |
5566 | return 0; |
5567 | if (sb->s_flags & MS_RDONLY) | |
5568 | return 1; | |
e2b911c5 | 5569 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
5570 | return 0; |
5571 | return 1; | |
5572 | } | |
24b58424 TT |
5573 | #else |
5574 | static inline void register_as_ext2(void) { } | |
5575 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5576 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5577 | #endif |
5578 | ||
24b58424 TT |
5579 | static inline void register_as_ext3(void) |
5580 | { | |
5581 | int err = register_filesystem(&ext3_fs_type); | |
5582 | if (err) | |
5583 | printk(KERN_WARNING | |
5584 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5585 | } | |
5586 | ||
5587 | static inline void unregister_as_ext3(void) | |
5588 | { | |
5589 | unregister_filesystem(&ext3_fs_type); | |
5590 | } | |
2035e776 TT |
5591 | |
5592 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5593 | { | |
e2b911c5 | 5594 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 5595 | return 0; |
e2b911c5 | 5596 | if (!ext4_has_feature_journal(sb)) |
2035e776 TT |
5597 | return 0; |
5598 | if (sb->s_flags & MS_RDONLY) | |
5599 | return 1; | |
e2b911c5 | 5600 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
5601 | return 0; |
5602 | return 1; | |
5603 | } | |
24b58424 | 5604 | |
03010a33 TT |
5605 | static struct file_system_type ext4_fs_type = { |
5606 | .owner = THIS_MODULE, | |
5607 | .name = "ext4", | |
152a0836 | 5608 | .mount = ext4_mount, |
03010a33 TT |
5609 | .kill_sb = kill_block_super, |
5610 | .fs_flags = FS_REQUIRES_DEV, | |
5611 | }; | |
7f78e035 | 5612 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5613 | |
e9e3bcec ES |
5614 | /* Shared across all ext4 file systems */ |
5615 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
e9e3bcec | 5616 | |
5dabfc78 | 5617 | static int __init ext4_init_fs(void) |
ac27a0ec | 5618 | { |
e9e3bcec | 5619 | int i, err; |
c9de560d | 5620 | |
e294a537 | 5621 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
5622 | ext4_li_info = NULL; |
5623 | mutex_init(&ext4_li_mtx); | |
5624 | ||
9a4c8019 | 5625 | /* Build-time check for flags consistency */ |
12e9b892 | 5626 | ext4_check_flag_values(); |
e9e3bcec | 5627 | |
e142d052 | 5628 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
e9e3bcec | 5629 | init_waitqueue_head(&ext4__ioend_wq[i]); |
e9e3bcec | 5630 | |
51865fda | 5631 | err = ext4_init_es(); |
6fd058f7 TT |
5632 | if (err) |
5633 | return err; | |
51865fda ZL |
5634 | |
5635 | err = ext4_init_pageio(); | |
5636 | if (err) | |
b5799018 | 5637 | goto out5; |
51865fda | 5638 | |
5dabfc78 | 5639 | err = ext4_init_system_zone(); |
bd2d0210 | 5640 | if (err) |
b5799018 | 5641 | goto out4; |
857ac889 | 5642 | |
b5799018 | 5643 | err = ext4_init_sysfs(); |
dd68314c | 5644 | if (err) |
b5799018 | 5645 | goto out3; |
857ac889 | 5646 | |
5dabfc78 | 5647 | err = ext4_init_mballoc(); |
c9de560d AT |
5648 | if (err) |
5649 | goto out2; | |
ac27a0ec DK |
5650 | err = init_inodecache(); |
5651 | if (err) | |
5652 | goto out1; | |
24b58424 | 5653 | register_as_ext3(); |
2035e776 | 5654 | register_as_ext2(); |
03010a33 | 5655 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5656 | if (err) |
5657 | goto out; | |
bfff6873 | 5658 | |
ac27a0ec DK |
5659 | return 0; |
5660 | out: | |
24b58424 TT |
5661 | unregister_as_ext2(); |
5662 | unregister_as_ext3(); | |
ac27a0ec DK |
5663 | destroy_inodecache(); |
5664 | out1: | |
5dabfc78 | 5665 | ext4_exit_mballoc(); |
9c191f70 | 5666 | out2: |
b5799018 TT |
5667 | ext4_exit_sysfs(); |
5668 | out3: | |
5dabfc78 | 5669 | ext4_exit_system_zone(); |
b5799018 | 5670 | out4: |
5dabfc78 | 5671 | ext4_exit_pageio(); |
b5799018 | 5672 | out5: |
51865fda ZL |
5673 | ext4_exit_es(); |
5674 | ||
ac27a0ec DK |
5675 | return err; |
5676 | } | |
5677 | ||
5dabfc78 | 5678 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5679 | { |
bfff6873 | 5680 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5681 | unregister_as_ext2(); |
5682 | unregister_as_ext3(); | |
03010a33 | 5683 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5684 | destroy_inodecache(); |
5dabfc78 | 5685 | ext4_exit_mballoc(); |
b5799018 | 5686 | ext4_exit_sysfs(); |
5dabfc78 TT |
5687 | ext4_exit_system_zone(); |
5688 | ext4_exit_pageio(); | |
dd12ed14 | 5689 | ext4_exit_es(); |
ac27a0ec DK |
5690 | } |
5691 | ||
5692 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5693 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5694 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5695 | module_init(ext4_init_fs) |
5696 | module_exit(ext4_exit_fs) |