Commit | Line | Data |
---|---|---|
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> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 | 46 | #include "ext4.h" |
4a092d73 | 47 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 48 | #include "ext4_jbd2.h" |
ac27a0ec DK |
49 | #include "xattr.h" |
50 | #include "acl.h" | |
3661d286 | 51 | #include "mballoc.h" |
ac27a0ec | 52 | |
9bffad1e TT |
53 | #define CREATE_TRACE_POINTS |
54 | #include <trace/events/ext4.h> | |
55 | ||
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 DK |
599 | { |
600 | va_list args; | |
601 | ||
1c13d5c0 | 602 | save_error_info(sb, function, line); |
ac27a0ec | 603 | va_start(args, fmt); |
c398eda0 TT |
604 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
605 | function, line); | |
ac27a0ec DK |
606 | vprintk(fmt, args); |
607 | printk("\n"); | |
608 | va_end(args); | |
609 | ||
1c13d5c0 TT |
610 | if ((sb->s_flags & MS_RDONLY) == 0) { |
611 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 612 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
613 | /* |
614 | * Make sure updated value of ->s_mount_flags will be visible | |
615 | * before ->s_flags update | |
616 | */ | |
617 | smp_wmb(); | |
618 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
619 | if (EXT4_SB(sb)->s_journal) |
620 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
621 | save_error_info(sb, function, line); | |
622 | } | |
4327ba52 DJ |
623 | if (test_opt(sb, ERRORS_PANIC)) { |
624 | if (EXT4_SB(sb)->s_journal && | |
625 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
626 | return; | |
617ba13b | 627 | panic("EXT4-fs panic from previous error\n"); |
4327ba52 | 628 | } |
ac27a0ec DK |
629 | } |
630 | ||
e7c96e8e JP |
631 | void __ext4_msg(struct super_block *sb, |
632 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 633 | { |
0ff2ea7d | 634 | struct va_format vaf; |
b31e1552 ES |
635 | va_list args; |
636 | ||
efbed4dc TT |
637 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
638 | return; | |
639 | ||
b31e1552 | 640 | va_start(args, fmt); |
0ff2ea7d JP |
641 | vaf.fmt = fmt; |
642 | vaf.va = &args; | |
643 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
644 | va_end(args); |
645 | } | |
646 | ||
b03a2f7e AD |
647 | #define ext4_warning_ratelimit(sb) \ |
648 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
649 | "EXT4-fs warning") | |
650 | ||
12062ddd | 651 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 652 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 653 | { |
0ff2ea7d | 654 | struct va_format vaf; |
ac27a0ec DK |
655 | va_list args; |
656 | ||
b03a2f7e | 657 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
658 | return; |
659 | ||
ac27a0ec | 660 | va_start(args, fmt); |
0ff2ea7d JP |
661 | vaf.fmt = fmt; |
662 | vaf.va = &args; | |
663 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
664 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
665 | va_end(args); |
666 | } | |
667 | ||
b03a2f7e AD |
668 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
669 | unsigned int line, const char *fmt, ...) | |
670 | { | |
671 | struct va_format vaf; | |
672 | va_list args; | |
673 | ||
674 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
675 | return; | |
676 | ||
677 | va_start(args, fmt); | |
678 | vaf.fmt = fmt; | |
679 | vaf.va = &args; | |
680 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
681 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
682 | function, line, inode->i_ino, current->comm, &vaf); | |
683 | va_end(args); | |
684 | } | |
685 | ||
e29136f8 TT |
686 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
687 | struct super_block *sb, ext4_group_t grp, | |
688 | unsigned long ino, ext4_fsblk_t block, | |
689 | const char *fmt, ...) | |
5d1b1b3f AK |
690 | __releases(bitlock) |
691 | __acquires(bitlock) | |
692 | { | |
0ff2ea7d | 693 | struct va_format vaf; |
5d1b1b3f AK |
694 | va_list args; |
695 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
696 | ||
1c13d5c0 TT |
697 | es->s_last_error_ino = cpu_to_le32(ino); |
698 | es->s_last_error_block = cpu_to_le64(block); | |
699 | __save_error_info(sb, function, line); | |
0ff2ea7d | 700 | |
efbed4dc TT |
701 | if (ext4_error_ratelimit(sb)) { |
702 | va_start(args, fmt); | |
703 | vaf.fmt = fmt; | |
704 | vaf.va = &args; | |
705 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
706 | sb->s_id, function, line, grp); | |
707 | if (ino) | |
708 | printk(KERN_CONT "inode %lu: ", ino); | |
709 | if (block) | |
710 | printk(KERN_CONT "block %llu:", | |
711 | (unsigned long long) block); | |
712 | printk(KERN_CONT "%pV\n", &vaf); | |
713 | va_end(args); | |
714 | } | |
5d1b1b3f AK |
715 | |
716 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 717 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
718 | return; |
719 | } | |
1c13d5c0 | 720 | |
5d1b1b3f AK |
721 | ext4_unlock_group(sb, grp); |
722 | ext4_handle_error(sb); | |
723 | /* | |
724 | * We only get here in the ERRORS_RO case; relocking the group | |
725 | * may be dangerous, but nothing bad will happen since the | |
726 | * filesystem will have already been marked read/only and the | |
727 | * journal has been aborted. We return 1 as a hint to callers | |
728 | * who might what to use the return value from | |
25985edc | 729 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
730 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
731 | * aggressively from the ext4 function in question, with a | |
732 | * more appropriate error code. | |
733 | */ | |
734 | ext4_lock_group(sb, grp); | |
735 | return; | |
736 | } | |
737 | ||
617ba13b | 738 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 739 | { |
617ba13b | 740 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 741 | |
617ba13b | 742 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
743 | return; |
744 | ||
12062ddd | 745 | ext4_warning(sb, |
ac27a0ec DK |
746 | "updating to rev %d because of new feature flag, " |
747 | "running e2fsck is recommended", | |
617ba13b | 748 | EXT4_DYNAMIC_REV); |
ac27a0ec | 749 | |
617ba13b MC |
750 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
751 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
752 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
753 | /* leave es->s_feature_*compat flags alone */ |
754 | /* es->s_uuid will be set by e2fsck if empty */ | |
755 | ||
756 | /* | |
757 | * The rest of the superblock fields should be zero, and if not it | |
758 | * means they are likely already in use, so leave them alone. We | |
759 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
760 | */ | |
761 | } | |
762 | ||
763 | /* | |
764 | * Open the external journal device | |
765 | */ | |
b31e1552 | 766 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
767 | { |
768 | struct block_device *bdev; | |
769 | char b[BDEVNAME_SIZE]; | |
770 | ||
d4d77629 | 771 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
772 | if (IS_ERR(bdev)) |
773 | goto fail; | |
774 | return bdev; | |
775 | ||
776 | fail: | |
b31e1552 | 777 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
778 | __bdevname(dev, b), PTR_ERR(bdev)); |
779 | return NULL; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Release the journal device | |
784 | */ | |
4385bab1 | 785 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 786 | { |
4385bab1 | 787 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
788 | } |
789 | ||
4385bab1 | 790 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
791 | { |
792 | struct block_device *bdev; | |
ac27a0ec DK |
793 | bdev = sbi->journal_bdev; |
794 | if (bdev) { | |
4385bab1 | 795 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
796 | sbi->journal_bdev = NULL; |
797 | } | |
ac27a0ec DK |
798 | } |
799 | ||
800 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
801 | { | |
617ba13b | 802 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
803 | } |
804 | ||
617ba13b | 805 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
806 | { |
807 | struct list_head *l; | |
808 | ||
b31e1552 ES |
809 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
810 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
811 | |
812 | printk(KERN_ERR "sb_info orphan list:\n"); | |
813 | list_for_each(l, &sbi->s_orphan) { | |
814 | struct inode *inode = orphan_list_entry(l); | |
815 | printk(KERN_ERR " " | |
816 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
817 | inode->i_sb->s_id, inode->i_ino, inode, | |
818 | inode->i_mode, inode->i_nlink, | |
819 | NEXT_ORPHAN(inode)); | |
820 | } | |
821 | } | |
822 | ||
2b2d6d01 | 823 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 824 | { |
617ba13b MC |
825 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
826 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 827 | int i, err; |
ac27a0ec | 828 | |
857ac889 | 829 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
830 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
831 | ||
2e8fa54e | 832 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 833 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 834 | |
0390131b FM |
835 | if (sbi->s_journal) { |
836 | err = jbd2_journal_destroy(sbi->s_journal); | |
837 | sbi->s_journal = NULL; | |
838 | if (err < 0) | |
c67d859e | 839 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 840 | } |
d4edac31 | 841 | |
ebd173be | 842 | ext4_unregister_sysfs(sb); |
d3922a77 | 843 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 844 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
845 | ext4_release_system_zone(sb); |
846 | ext4_mb_release(sb); | |
847 | ext4_ext_release(sb); | |
d4edac31 | 848 | |
ac27a0ec | 849 | if (!(sb->s_flags & MS_RDONLY)) { |
e2b911c5 | 850 | ext4_clear_feature_journal_needs_recovery(sb); |
ac27a0ec | 851 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 852 | } |
58c5873a | 853 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
854 | ext4_commit_super(sb, 1); |
855 | ||
ac27a0ec DK |
856 | for (i = 0; i < sbi->s_gdb_count; i++) |
857 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
858 | kvfree(sbi->s_group_desc); |
859 | kvfree(sbi->s_flex_groups); | |
57042651 | 860 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
861 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
862 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 863 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c8585c6f | 864 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
ac27a0ec DK |
865 | brelse(sbi->s_sbh); |
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); | |
ac27a0ec | 897 | sb->s_fs_info = NULL; |
3197ebdb TT |
898 | /* |
899 | * Now that we are completely done shutting down the | |
900 | * superblock, we need to actually destroy the kobject. | |
901 | */ | |
3197ebdb TT |
902 | kobject_put(&sbi->s_kobj); |
903 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
904 | if (sbi->s_chksum_driver) |
905 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 906 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 907 | kfree(sbi); |
ac27a0ec DK |
908 | } |
909 | ||
e18b890b | 910 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
911 | |
912 | /* | |
913 | * Called inside transaction, so use GFP_NOFS | |
914 | */ | |
617ba13b | 915 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 916 | { |
617ba13b | 917 | struct ext4_inode_info *ei; |
ac27a0ec | 918 | |
e6b4f8da | 919 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
920 | if (!ei) |
921 | return NULL; | |
0b8e58a1 | 922 | |
ac27a0ec | 923 | ei->vfs_inode.i_version = 1; |
202ee5df | 924 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
925 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
926 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
927 | ext4_es_init_tree(&ei->i_es_tree); |
928 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 929 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 930 | ei->i_es_all_nr = 0; |
edaa53ca | 931 | ei->i_es_shk_nr = 0; |
dd475925 | 932 | ei->i_es_shrink_lblk = 0; |
d2a17637 MC |
933 | ei->i_reserved_data_blocks = 0; |
934 | ei->i_reserved_meta_blocks = 0; | |
935 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 936 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 937 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 938 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
939 | #ifdef CONFIG_QUOTA |
940 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 941 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 942 | #endif |
8aefcd55 | 943 | ei->jinode = NULL; |
2e8fa54e | 944 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 945 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
946 | ei->i_sync_tid = 0; |
947 | ei->i_datasync_tid = 0; | |
e27f41e1 | 948 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 949 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
ac27a0ec DK |
950 | return &ei->vfs_inode; |
951 | } | |
952 | ||
7ff9c073 TT |
953 | static int ext4_drop_inode(struct inode *inode) |
954 | { | |
955 | int drop = generic_drop_inode(inode); | |
956 | ||
957 | trace_ext4_drop_inode(inode, drop); | |
958 | return drop; | |
959 | } | |
960 | ||
fa0d7e3d NP |
961 | static void ext4_i_callback(struct rcu_head *head) |
962 | { | |
963 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
964 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
965 | } | |
966 | ||
617ba13b | 967 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 968 | { |
9f7dd93d | 969 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
970 | ext4_msg(inode->i_sb, KERN_ERR, |
971 | "Inode %lu (%p): orphan list check failed!", | |
972 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
973 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
974 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
975 | true); | |
976 | dump_stack(); | |
977 | } | |
fa0d7e3d | 978 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
979 | } |
980 | ||
51cc5068 | 981 | static void init_once(void *foo) |
ac27a0ec | 982 | { |
617ba13b | 983 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 984 | |
a35afb83 | 985 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 986 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 987 | init_rwsem(&ei->i_data_sem); |
ea3d7209 | 988 | init_rwsem(&ei->i_mmap_sem); |
a35afb83 | 989 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
990 | } |
991 | ||
e67bc2b3 | 992 | static int __init init_inodecache(void) |
ac27a0ec | 993 | { |
617ba13b MC |
994 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
995 | sizeof(struct ext4_inode_info), | |
ac27a0ec | 996 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 997 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 998 | init_once); |
617ba13b | 999 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1000 | return -ENOMEM; |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | static void destroy_inodecache(void) | |
1005 | { | |
8c0a8537 KS |
1006 | /* |
1007 | * Make sure all delayed rcu free inodes are flushed before we | |
1008 | * destroy cache. | |
1009 | */ | |
1010 | rcu_barrier(); | |
617ba13b | 1011 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1012 | } |
1013 | ||
0930fcc1 | 1014 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1015 | { |
0930fcc1 | 1016 | invalidate_inode_buffers(inode); |
dbd5768f | 1017 | clear_inode(inode); |
9f754758 | 1018 | dquot_drop(inode); |
c2ea3fde | 1019 | ext4_discard_preallocations(inode); |
51865fda | 1020 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
1021 | if (EXT4_I(inode)->jinode) { |
1022 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1023 | EXT4_I(inode)->jinode); | |
1024 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1025 | EXT4_I(inode)->jinode = NULL; | |
1026 | } | |
b7236e21 | 1027 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
a7550b30 | 1028 | fscrypt_put_encryption_info(inode, NULL); |
b7236e21 | 1029 | #endif |
ac27a0ec DK |
1030 | } |
1031 | ||
1b961ac0 | 1032 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1033 | u64 ino, u32 generation) |
ac27a0ec | 1034 | { |
ac27a0ec | 1035 | struct inode *inode; |
ac27a0ec | 1036 | |
617ba13b | 1037 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1038 | return ERR_PTR(-ESTALE); |
617ba13b | 1039 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1040 | return ERR_PTR(-ESTALE); |
1041 | ||
1042 | /* iget isn't really right if the inode is currently unallocated!! | |
1043 | * | |
617ba13b | 1044 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1045 | * deleted, so we should be safe. |
1046 | * | |
1047 | * Currently we don't know the generation for parent directory, so | |
1048 | * a generation of 0 means "accept any" | |
1049 | */ | |
f4bb2981 | 1050 | inode = ext4_iget_normal(sb, ino); |
1d1fe1ee DH |
1051 | if (IS_ERR(inode)) |
1052 | return ERR_CAST(inode); | |
1053 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1054 | iput(inode); |
1055 | return ERR_PTR(-ESTALE); | |
1056 | } | |
1b961ac0 CH |
1057 | |
1058 | return inode; | |
1059 | } | |
1060 | ||
1061 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1062 | int fh_len, int fh_type) |
1b961ac0 CH |
1063 | { |
1064 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1065 | ext4_nfs_get_inode); | |
1066 | } | |
1067 | ||
1068 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1069 | int fh_len, int fh_type) |
1b961ac0 CH |
1070 | { |
1071 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1072 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1073 | } |
1074 | ||
c39a7f84 TO |
1075 | /* |
1076 | * Try to release metadata pages (indirect blocks, directories) which are | |
1077 | * mapped via the block device. Since these pages could have journal heads | |
1078 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1079 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1080 | */ | |
0b8e58a1 AD |
1081 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1082 | gfp_t wait) | |
c39a7f84 TO |
1083 | { |
1084 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1085 | ||
1086 | WARN_ON(PageChecked(page)); | |
1087 | if (!page_has_buffers(page)) | |
1088 | return 0; | |
1089 | if (journal) | |
1090 | return jbd2_journal_try_to_free_buffers(journal, page, | |
d0164adc | 1091 | wait & ~__GFP_DIRECT_RECLAIM); |
c39a7f84 TO |
1092 | return try_to_free_buffers(page); |
1093 | } | |
1094 | ||
a7550b30 JK |
1095 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
1096 | static int ext4_get_context(struct inode *inode, void *ctx, size_t len) | |
1097 | { | |
1098 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1099 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); | |
1100 | } | |
1101 | ||
1102 | static int ext4_key_prefix(struct inode *inode, u8 **key) | |
1103 | { | |
1104 | *key = EXT4_SB(inode->i_sb)->key_prefix; | |
1105 | return EXT4_SB(inode->i_sb)->key_prefix_size; | |
1106 | } | |
1107 | ||
1108 | static int ext4_prepare_context(struct inode *inode) | |
1109 | { | |
1110 | return ext4_convert_inline_data(inode); | |
1111 | } | |
1112 | ||
1113 | static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, | |
1114 | void *fs_data) | |
1115 | { | |
1116 | handle_t *handle; | |
1117 | int res, res2; | |
1118 | ||
1119 | /* fs_data is null when internally used. */ | |
1120 | if (fs_data) { | |
1121 | res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1122 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, | |
1123 | len, 0); | |
1124 | if (!res) { | |
1125 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
1126 | ext4_clear_inode_state(inode, | |
1127 | EXT4_STATE_MAY_INLINE_DATA); | |
1128 | } | |
1129 | return res; | |
1130 | } | |
1131 | ||
1132 | handle = ext4_journal_start(inode, EXT4_HT_MISC, | |
1133 | ext4_jbd2_credits_xattr(inode)); | |
1134 | if (IS_ERR(handle)) | |
1135 | return PTR_ERR(handle); | |
1136 | ||
1137 | res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1138 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, | |
1139 | len, 0); | |
1140 | if (!res) { | |
1141 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
1142 | res = ext4_mark_inode_dirty(handle, inode); | |
1143 | if (res) | |
1144 | EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); | |
1145 | } | |
1146 | res2 = ext4_journal_stop(handle); | |
1147 | if (!res) | |
1148 | res = res2; | |
1149 | return res; | |
1150 | } | |
1151 | ||
1152 | static int ext4_dummy_context(struct inode *inode) | |
1153 | { | |
1154 | return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); | |
1155 | } | |
1156 | ||
1157 | static unsigned ext4_max_namelen(struct inode *inode) | |
1158 | { | |
1159 | return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : | |
1160 | EXT4_NAME_LEN; | |
1161 | } | |
1162 | ||
1163 | static struct fscrypt_operations ext4_cryptops = { | |
1164 | .get_context = ext4_get_context, | |
1165 | .key_prefix = ext4_key_prefix, | |
1166 | .prepare_context = ext4_prepare_context, | |
1167 | .set_context = ext4_set_context, | |
1168 | .dummy_context = ext4_dummy_context, | |
1169 | .is_encrypted = ext4_encrypted_inode, | |
1170 | .empty_dir = ext4_empty_dir, | |
1171 | .max_namelen = ext4_max_namelen, | |
1172 | }; | |
1173 | #else | |
1174 | static struct fscrypt_operations ext4_cryptops = { | |
1175 | .is_encrypted = ext4_encrypted_inode, | |
1176 | }; | |
1177 | #endif | |
1178 | ||
ac27a0ec | 1179 | #ifdef CONFIG_QUOTA |
689c958c LX |
1180 | static char *quotatypes[] = INITQFNAMES; |
1181 | #define QTYPE2NAME(t) (quotatypes[t]) | |
ac27a0ec | 1182 | |
617ba13b MC |
1183 | static int ext4_write_dquot(struct dquot *dquot); |
1184 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1185 | static int ext4_release_dquot(struct dquot *dquot); | |
1186 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1187 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1188 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1189 | struct path *path); |
ca0e05e4 | 1190 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1191 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1192 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1193 | size_t len, loff_t off); |
617ba13b | 1194 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1195 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1196 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1197 | unsigned int flags); | |
1198 | static int ext4_enable_quotas(struct super_block *sb); | |
8f0e8746 | 1199 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); |
ac27a0ec | 1200 | |
96c7e0d9 JK |
1201 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1202 | { | |
1203 | return EXT4_I(inode)->i_dquot; | |
1204 | } | |
1205 | ||
61e225dc | 1206 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1207 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1208 | .write_dquot = ext4_write_dquot, |
1209 | .acquire_dquot = ext4_acquire_dquot, | |
1210 | .release_dquot = ext4_release_dquot, | |
1211 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1212 | .write_info = ext4_write_info, |
1213 | .alloc_dquot = dquot_alloc, | |
1214 | .destroy_dquot = dquot_destroy, | |
040cb378 | 1215 | .get_projid = ext4_get_projid, |
8f0e8746 | 1216 | .get_next_id = ext4_get_next_id, |
ac27a0ec DK |
1217 | }; |
1218 | ||
0d54b217 | 1219 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1220 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1221 | .quota_off = ext4_quota_off, |
287a8095 | 1222 | .quota_sync = dquot_quota_sync, |
0a240339 | 1223 | .get_state = dquot_get_state, |
287a8095 CH |
1224 | .set_info = dquot_set_dqinfo, |
1225 | .get_dqblk = dquot_get_dqblk, | |
6332b9b5 ES |
1226 | .set_dqblk = dquot_set_dqblk, |
1227 | .get_nextdqblk = dquot_get_next_dqblk, | |
ac27a0ec DK |
1228 | }; |
1229 | #endif | |
1230 | ||
ee9b6d61 | 1231 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1232 | .alloc_inode = ext4_alloc_inode, |
1233 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1234 | .write_inode = ext4_write_inode, |
1235 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1236 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1237 | .evict_inode = ext4_evict_inode, |
617ba13b | 1238 | .put_super = ext4_put_super, |
617ba13b | 1239 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1240 | .freeze_fs = ext4_freeze, |
1241 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1242 | .statfs = ext4_statfs, |
1243 | .remount_fs = ext4_remount, | |
617ba13b | 1244 | .show_options = ext4_show_options, |
ac27a0ec | 1245 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1246 | .quota_read = ext4_quota_read, |
1247 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1248 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1249 | #endif |
c39a7f84 | 1250 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1251 | }; |
1252 | ||
39655164 | 1253 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1254 | .fh_to_dentry = ext4_fh_to_dentry, |
1255 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1256 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1257 | }; |
1258 | ||
1259 | enum { | |
1260 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1261 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1262 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1263 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1264 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1265 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1266 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1267 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1268 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1269 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1270 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1271 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
49da9392 | 1272 | Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, |
1449032b | 1273 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
a26f4992 | 1274 | Opt_lazytime, Opt_nolazytime, |
1449032b | 1275 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1276 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1277 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1278 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
c6d3d56d | 1279 | Opt_max_dir_size_kb, Opt_nojournal_checksum, |
ac27a0ec DK |
1280 | }; |
1281 | ||
a447c093 | 1282 | static const match_table_t tokens = { |
ac27a0ec DK |
1283 | {Opt_bsd_df, "bsddf"}, |
1284 | {Opt_minix_df, "minixdf"}, | |
1285 | {Opt_grpid, "grpid"}, | |
1286 | {Opt_grpid, "bsdgroups"}, | |
1287 | {Opt_nogrpid, "nogrpid"}, | |
1288 | {Opt_nogrpid, "sysvgroups"}, | |
1289 | {Opt_resgid, "resgid=%u"}, | |
1290 | {Opt_resuid, "resuid=%u"}, | |
1291 | {Opt_sb, "sb=%u"}, | |
1292 | {Opt_err_cont, "errors=continue"}, | |
1293 | {Opt_err_panic, "errors=panic"}, | |
1294 | {Opt_err_ro, "errors=remount-ro"}, | |
1295 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1296 | {Opt_debug, "debug"}, |
72578c33 TT |
1297 | {Opt_removed, "oldalloc"}, |
1298 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1299 | {Opt_user_xattr, "user_xattr"}, |
1300 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1301 | {Opt_acl, "acl"}, | |
1302 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1303 | {Opt_noload, "norecovery"}, |
5a916be1 | 1304 | {Opt_noload, "noload"}, |
72578c33 TT |
1305 | {Opt_removed, "nobh"}, |
1306 | {Opt_removed, "bh"}, | |
ac27a0ec | 1307 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1308 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1309 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1310 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1311 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1312 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1313 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1314 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1315 | {Opt_abort, "abort"}, |
1316 | {Opt_data_journal, "data=journal"}, | |
1317 | {Opt_data_ordered, "data=ordered"}, | |
1318 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1319 | {Opt_data_err_abort, "data_err=abort"}, |
1320 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1321 | {Opt_offusrjquota, "usrjquota="}, |
1322 | {Opt_usrjquota, "usrjquota=%s"}, | |
1323 | {Opt_offgrpjquota, "grpjquota="}, | |
1324 | {Opt_grpjquota, "grpjquota=%s"}, | |
1325 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1326 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1327 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1328 | {Opt_grpquota, "grpquota"}, |
1329 | {Opt_noquota, "noquota"}, | |
1330 | {Opt_quota, "quota"}, | |
1331 | {Opt_usrquota, "usrquota"}, | |
49da9392 | 1332 | {Opt_prjquota, "prjquota"}, |
ac27a0ec | 1333 | {Opt_barrier, "barrier=%u"}, |
06705bff TT |
1334 | {Opt_barrier, "barrier"}, |
1335 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1336 | {Opt_i_version, "i_version"}, |
923ae0ff | 1337 | {Opt_dax, "dax"}, |
c9de560d | 1338 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1339 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1340 | {Opt_lazytime, "lazytime"}, |
1341 | {Opt_nolazytime, "nolazytime"}, | |
dd919b98 | 1342 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1343 | {Opt_removed, "mblk_io_submit"}, |
1344 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1345 | {Opt_block_validity, "block_validity"}, |
1346 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1347 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1348 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1349 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1350 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1351 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1352 | {Opt_dioread_nolock, "dioread_nolock"}, |
1353 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1354 | {Opt_discard, "discard"}, |
1355 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1356 | {Opt_init_itable, "init_itable=%u"}, |
1357 | {Opt_init_itable, "init_itable"}, | |
1358 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1359 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1360 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
c7198b9c TT |
1361 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1362 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1363 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1364 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1365 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1366 | {Opt_err, NULL}, |
ac27a0ec DK |
1367 | }; |
1368 | ||
617ba13b | 1369 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1370 | { |
617ba13b | 1371 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1372 | char *options = (char *) *data; |
1373 | ||
1374 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1375 | return 1; /* Default location */ | |
0b8e58a1 | 1376 | |
ac27a0ec | 1377 | options += 3; |
0b8e58a1 | 1378 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1379 | sb_block = simple_strtoul(options, &options, 0); |
1380 | if (*options && *options != ',') { | |
4776004f | 1381 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1382 | (char *) *data); |
1383 | return 1; | |
1384 | } | |
1385 | if (*options == ',') | |
1386 | options++; | |
1387 | *data = (void *) options; | |
0b8e58a1 | 1388 | |
ac27a0ec DK |
1389 | return sb_block; |
1390 | } | |
1391 | ||
b3881f74 | 1392 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1393 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1394 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1395 | |
56c50f11 DM |
1396 | #ifdef CONFIG_QUOTA |
1397 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1398 | { | |
1399 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1400 | char *qname; | |
03dafb5f | 1401 | int ret = -1; |
56c50f11 DM |
1402 | |
1403 | if (sb_any_quota_loaded(sb) && | |
1404 | !sbi->s_qf_names[qtype]) { | |
1405 | ext4_msg(sb, KERN_ERR, | |
1406 | "Cannot change journaled " | |
1407 | "quota options when quota turned on"); | |
57f73c2c | 1408 | return -1; |
56c50f11 | 1409 | } |
e2b911c5 | 1410 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1411 | ext4_msg(sb, KERN_INFO, "Journaled quota options " |
1412 | "ignored when QUOTA feature is enabled"); | |
1413 | return 1; | |
262b4662 | 1414 | } |
56c50f11 DM |
1415 | qname = match_strdup(args); |
1416 | if (!qname) { | |
1417 | ext4_msg(sb, KERN_ERR, | |
1418 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1419 | return -1; |
56c50f11 | 1420 | } |
03dafb5f CG |
1421 | if (sbi->s_qf_names[qtype]) { |
1422 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1423 | ret = 1; | |
1424 | else | |
1425 | ext4_msg(sb, KERN_ERR, | |
1426 | "%s quota file already specified", | |
1427 | QTYPE2NAME(qtype)); | |
1428 | goto errout; | |
56c50f11 | 1429 | } |
03dafb5f | 1430 | if (strchr(qname, '/')) { |
56c50f11 DM |
1431 | ext4_msg(sb, KERN_ERR, |
1432 | "quotafile must be on filesystem root"); | |
03dafb5f | 1433 | goto errout; |
56c50f11 | 1434 | } |
03dafb5f | 1435 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1436 | set_opt(sb, QUOTA); |
56c50f11 | 1437 | return 1; |
03dafb5f CG |
1438 | errout: |
1439 | kfree(qname); | |
1440 | return ret; | |
56c50f11 DM |
1441 | } |
1442 | ||
1443 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1444 | { | |
1445 | ||
1446 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1447 | ||
1448 | if (sb_any_quota_loaded(sb) && | |
1449 | sbi->s_qf_names[qtype]) { | |
1450 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1451 | " when quota turned on"); | |
57f73c2c | 1452 | return -1; |
56c50f11 | 1453 | } |
03dafb5f | 1454 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1455 | sbi->s_qf_names[qtype] = NULL; |
1456 | return 1; | |
1457 | } | |
1458 | #endif | |
1459 | ||
26092bf5 TT |
1460 | #define MOPT_SET 0x0001 |
1461 | #define MOPT_CLEAR 0x0002 | |
1462 | #define MOPT_NOSUPPORT 0x0004 | |
1463 | #define MOPT_EXPLICIT 0x0008 | |
1464 | #define MOPT_CLEAR_ERR 0x0010 | |
1465 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1466 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1467 | #define MOPT_Q 0 |
1468 | #define MOPT_QFMT 0x0040 | |
1469 | #else | |
1470 | #define MOPT_Q MOPT_NOSUPPORT | |
1471 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1472 | #endif |
26092bf5 | 1473 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1474 | #define MOPT_NO_EXT2 0x0100 |
1475 | #define MOPT_NO_EXT3 0x0200 | |
1476 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1477 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1478 | |
1479 | static const struct mount_opts { | |
1480 | int token; | |
1481 | int mount_opt; | |
1482 | int flags; | |
1483 | } ext4_mount_opts[] = { | |
1484 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1485 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1486 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1487 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1488 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1489 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1490 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1491 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1492 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1493 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1494 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1495 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1496 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1497 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1498 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1499 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1500 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1501 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1502 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1503 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1504 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1505 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1506 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1507 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1508 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1509 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1510 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c | 1511 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1512 | MOPT_NO_EXT2}, |
8dc0aa8c | 1513 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1514 | MOPT_NO_EXT2}, |
26092bf5 TT |
1515 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1516 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1517 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1518 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1519 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1520 | {Opt_commit, 0, MOPT_GTE0}, | |
1521 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1522 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1523 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1524 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1525 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1526 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1527 | {Opt_resuid, 0, MOPT_GTE0}, |
1528 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1529 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1530 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1531 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1532 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1533 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1534 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1535 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1536 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1537 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1538 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1539 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1540 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1541 | #else |
26092bf5 TT |
1542 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1543 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1544 | #endif |
26092bf5 TT |
1545 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1546 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1547 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1548 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1549 | MOPT_SET | MOPT_Q}, | |
1550 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1551 | MOPT_SET | MOPT_Q}, | |
49da9392 JK |
1552 | {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, |
1553 | MOPT_SET | MOPT_Q}, | |
26092bf5 | 1554 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
49da9392 JK |
1555 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), |
1556 | MOPT_CLEAR | MOPT_Q}, | |
26092bf5 TT |
1557 | {Opt_usrjquota, 0, MOPT_Q}, |
1558 | {Opt_grpjquota, 0, MOPT_Q}, | |
1559 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1560 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1561 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1562 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1563 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1564 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1565 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
26092bf5 TT |
1566 | {Opt_err, 0, 0} |
1567 | }; | |
1568 | ||
1569 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1570 | substring_t *args, unsigned long *journal_devnum, | |
1571 | unsigned int *journal_ioprio, int is_remount) | |
1572 | { | |
1573 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1574 | const struct mount_opts *m; | |
08cefc7a EB |
1575 | kuid_t uid; |
1576 | kgid_t gid; | |
26092bf5 TT |
1577 | int arg = 0; |
1578 | ||
57f73c2c TT |
1579 | #ifdef CONFIG_QUOTA |
1580 | if (token == Opt_usrjquota) | |
1581 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1582 | else if (token == Opt_grpjquota) | |
1583 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1584 | else if (token == Opt_offusrjquota) | |
1585 | return clear_qf_name(sb, USRQUOTA); | |
1586 | else if (token == Opt_offgrpjquota) | |
1587 | return clear_qf_name(sb, GRPQUOTA); | |
1588 | #endif | |
26092bf5 | 1589 | switch (token) { |
f7048605 TT |
1590 | case Opt_noacl: |
1591 | case Opt_nouser_xattr: | |
1592 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1593 | break; | |
26092bf5 TT |
1594 | case Opt_sb: |
1595 | return 1; /* handled by get_sb_block() */ | |
1596 | case Opt_removed: | |
5f3633e3 | 1597 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1598 | return 1; |
26092bf5 TT |
1599 | case Opt_abort: |
1600 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1601 | return 1; | |
1602 | case Opt_i_version: | |
1603 | sb->s_flags |= MS_I_VERSION; | |
1604 | return 1; | |
a26f4992 TT |
1605 | case Opt_lazytime: |
1606 | sb->s_flags |= MS_LAZYTIME; | |
1607 | return 1; | |
1608 | case Opt_nolazytime: | |
1609 | sb->s_flags &= ~MS_LAZYTIME; | |
1610 | return 1; | |
26092bf5 TT |
1611 | } |
1612 | ||
5f3633e3 JK |
1613 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1614 | if (token == m->token) | |
1615 | break; | |
1616 | ||
1617 | if (m->token == Opt_err) { | |
1618 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1619 | "or missing value", opt); | |
1620 | return -1; | |
1621 | } | |
1622 | ||
8dc0aa8c TT |
1623 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1624 | ext4_msg(sb, KERN_ERR, | |
1625 | "Mount option \"%s\" incompatible with ext2", opt); | |
1626 | return -1; | |
1627 | } | |
1628 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1629 | ext4_msg(sb, KERN_ERR, | |
1630 | "Mount option \"%s\" incompatible with ext3", opt); | |
1631 | return -1; | |
1632 | } | |
1633 | ||
ad4eec61 | 1634 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1635 | return -1; |
1636 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1637 | return -1; | |
c93cf2d7 DM |
1638 | if (m->flags & MOPT_EXPLICIT) { |
1639 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1640 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1641 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1642 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1643 | } else |
1644 | return -1; | |
1645 | } | |
5f3633e3 JK |
1646 | if (m->flags & MOPT_CLEAR_ERR) |
1647 | clear_opt(sb, ERRORS_MASK); | |
1648 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1649 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1650 | "options when quota turned on"); | |
1651 | return -1; | |
1652 | } | |
1653 | ||
1654 | if (m->flags & MOPT_NOSUPPORT) { | |
1655 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1656 | } else if (token == Opt_commit) { | |
1657 | if (arg == 0) | |
1658 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1659 | sbi->s_commit_interval = HZ * arg; | |
1660 | } else if (token == Opt_max_batch_time) { | |
5f3633e3 JK |
1661 | sbi->s_max_batch_time = arg; |
1662 | } else if (token == Opt_min_batch_time) { | |
1663 | sbi->s_min_batch_time = arg; | |
1664 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1665 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1666 | ext4_msg(sb, KERN_ERR, | |
1667 | "EXT4-fs: inode_readahead_blks must be " | |
1668 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1669 | return -1; |
5f3633e3 JK |
1670 | } |
1671 | sbi->s_inode_readahead_blks = arg; | |
1672 | } else if (token == Opt_init_itable) { | |
1673 | set_opt(sb, INIT_INODE_TABLE); | |
1674 | if (!args->from) | |
1675 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1676 | sbi->s_li_wait_mult = arg; | |
1677 | } else if (token == Opt_max_dir_size_kb) { | |
1678 | sbi->s_max_dir_size_kb = arg; | |
1679 | } else if (token == Opt_stripe) { | |
1680 | sbi->s_stripe = arg; | |
1681 | } else if (token == Opt_resuid) { | |
1682 | uid = make_kuid(current_user_ns(), arg); | |
1683 | if (!uid_valid(uid)) { | |
1684 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1685 | return -1; |
1686 | } | |
5f3633e3 JK |
1687 | sbi->s_resuid = uid; |
1688 | } else if (token == Opt_resgid) { | |
1689 | gid = make_kgid(current_user_ns(), arg); | |
1690 | if (!gid_valid(gid)) { | |
1691 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1692 | return -1; | |
1693 | } | |
1694 | sbi->s_resgid = gid; | |
1695 | } else if (token == Opt_journal_dev) { | |
1696 | if (is_remount) { | |
1697 | ext4_msg(sb, KERN_ERR, | |
1698 | "Cannot specify journal on remount"); | |
1699 | return -1; | |
1700 | } | |
1701 | *journal_devnum = arg; | |
ad4eec61 ES |
1702 | } else if (token == Opt_journal_path) { |
1703 | char *journal_path; | |
1704 | struct inode *journal_inode; | |
1705 | struct path path; | |
1706 | int error; | |
1707 | ||
1708 | if (is_remount) { | |
1709 | ext4_msg(sb, KERN_ERR, | |
1710 | "Cannot specify journal on remount"); | |
1711 | return -1; | |
1712 | } | |
1713 | journal_path = match_strdup(&args[0]); | |
1714 | if (!journal_path) { | |
1715 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1716 | "journal device string"); | |
1717 | return -1; | |
1718 | } | |
1719 | ||
1720 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1721 | if (error) { | |
1722 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1723 | "journal device path: error %d", error); | |
1724 | kfree(journal_path); | |
1725 | return -1; | |
1726 | } | |
1727 | ||
2b0143b5 | 1728 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1729 | if (!S_ISBLK(journal_inode->i_mode)) { |
1730 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1731 | "is not a block device", journal_path); | |
1732 | path_put(&path); | |
1733 | kfree(journal_path); | |
1734 | return -1; | |
1735 | } | |
1736 | ||
1737 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1738 | path_put(&path); | |
1739 | kfree(journal_path); | |
5f3633e3 JK |
1740 | } else if (token == Opt_journal_ioprio) { |
1741 | if (arg > 7) { | |
1742 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1743 | " (must be 0-7)"); | |
1744 | return -1; | |
1745 | } | |
1746 | *journal_ioprio = | |
1747 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1748 | } else if (token == Opt_test_dummy_encryption) { |
1749 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1750 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1751 | ext4_msg(sb, KERN_WARNING, | |
1752 | "Test dummy encryption mode enabled"); | |
1753 | #else | |
1754 | ext4_msg(sb, KERN_WARNING, | |
1755 | "Test dummy encryption mount option ignored"); | |
1756 | #endif | |
5f3633e3 JK |
1757 | } else if (m->flags & MOPT_DATAJ) { |
1758 | if (is_remount) { | |
1759 | if (!sbi->s_journal) | |
1760 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1761 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1762 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1763 | "Cannot change data mode on remount"); |
26092bf5 | 1764 | return -1; |
ac27a0ec | 1765 | } |
26092bf5 | 1766 | } else { |
5f3633e3 JK |
1767 | clear_opt(sb, DATA_FLAGS); |
1768 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1769 | } |
5f3633e3 JK |
1770 | #ifdef CONFIG_QUOTA |
1771 | } else if (m->flags & MOPT_QFMT) { | |
1772 | if (sb_any_quota_loaded(sb) && | |
1773 | sbi->s_jquota_fmt != m->mount_opt) { | |
1774 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1775 | "quota options when quota turned on"); | |
1776 | return -1; | |
1777 | } | |
e2b911c5 | 1778 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1779 | ext4_msg(sb, KERN_INFO, |
1780 | "Quota format mount options ignored " | |
262b4662 | 1781 | "when QUOTA feature is enabled"); |
c325a67c | 1782 | return 1; |
262b4662 | 1783 | } |
5f3633e3 | 1784 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 1785 | #endif |
923ae0ff | 1786 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
1787 | #ifdef CONFIG_FS_DAX |
1788 | ext4_msg(sb, KERN_WARNING, | |
1789 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
1790 | sbi->s_mount_opt |= m->mount_opt; | |
1791 | #else | |
923ae0ff RZ |
1792 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
1793 | return -1; | |
5f3633e3 | 1794 | #endif |
7915a861 AN |
1795 | } else if (token == Opt_data_err_abort) { |
1796 | sbi->s_mount_opt |= m->mount_opt; | |
1797 | } else if (token == Opt_data_err_ignore) { | |
1798 | sbi->s_mount_opt &= ~m->mount_opt; | |
5f3633e3 JK |
1799 | } else { |
1800 | if (!args->from) | |
1801 | arg = 1; | |
1802 | if (m->flags & MOPT_CLEAR) | |
1803 | arg = !arg; | |
1804 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1805 | ext4_msg(sb, KERN_WARNING, | |
1806 | "buggy handling of option %s", opt); | |
1807 | WARN_ON(1); | |
1808 | return -1; | |
1809 | } | |
1810 | if (arg != 0) | |
1811 | sbi->s_mount_opt |= m->mount_opt; | |
1812 | else | |
1813 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1814 | } |
5f3633e3 | 1815 | return 1; |
26092bf5 TT |
1816 | } |
1817 | ||
1818 | static int parse_options(char *options, struct super_block *sb, | |
1819 | unsigned long *journal_devnum, | |
1820 | unsigned int *journal_ioprio, | |
1821 | int is_remount) | |
1822 | { | |
1823 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1824 | char *p; | |
1825 | substring_t args[MAX_OPT_ARGS]; | |
1826 | int token; | |
1827 | ||
1828 | if (!options) | |
1829 | return 1; | |
1830 | ||
1831 | while ((p = strsep(&options, ",")) != NULL) { | |
1832 | if (!*p) | |
1833 | continue; | |
1834 | /* | |
1835 | * Initialize args struct so we know whether arg was | |
1836 | * found; some options take optional arguments. | |
1837 | */ | |
caecd0af | 1838 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1839 | token = match_token(p, tokens, args); |
1840 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1841 | journal_ioprio, is_remount) < 0) | |
1842 | return 0; | |
ac27a0ec DK |
1843 | } |
1844 | #ifdef CONFIG_QUOTA | |
49da9392 JK |
1845 | /* |
1846 | * We do the test below only for project quotas. 'usrquota' and | |
1847 | * 'grpquota' mount options are allowed even without quota feature | |
1848 | * to support legacy quotas in quota files. | |
1849 | */ | |
1850 | if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { | |
1851 | ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " | |
1852 | "Cannot enable project quota enforcement."); | |
1853 | return 0; | |
1854 | } | |
1855 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1856 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1857 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1858 | |
482a7425 | 1859 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1860 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1861 | |
56c50f11 | 1862 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1863 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1864 | "format mixing"); | |
ac27a0ec DK |
1865 | return 0; |
1866 | } | |
1867 | ||
1868 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1869 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1870 | "not specified"); | |
ac27a0ec DK |
1871 | return 0; |
1872 | } | |
ac27a0ec DK |
1873 | } |
1874 | #endif | |
261cb20c JK |
1875 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1876 | int blocksize = | |
1877 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1878 | ||
09cbfeaf | 1879 | if (blocksize < PAGE_SIZE) { |
261cb20c JK |
1880 | ext4_msg(sb, KERN_ERR, "can't mount with " |
1881 | "dioread_nolock if block size != PAGE_SIZE"); | |
1882 | return 0; | |
1883 | } | |
1884 | } | |
d4f76107 JK |
1885 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && |
1886 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
1887 | ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " | |
1888 | "in data=ordered mode"); | |
1889 | return 0; | |
1890 | } | |
ac27a0ec DK |
1891 | return 1; |
1892 | } | |
1893 | ||
2adf6da8 TT |
1894 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1895 | struct super_block *sb) | |
1896 | { | |
1897 | #if defined(CONFIG_QUOTA) | |
1898 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1899 | ||
1900 | if (sbi->s_jquota_fmt) { | |
1901 | char *fmtname = ""; | |
1902 | ||
1903 | switch (sbi->s_jquota_fmt) { | |
1904 | case QFMT_VFS_OLD: | |
1905 | fmtname = "vfsold"; | |
1906 | break; | |
1907 | case QFMT_VFS_V0: | |
1908 | fmtname = "vfsv0"; | |
1909 | break; | |
1910 | case QFMT_VFS_V1: | |
1911 | fmtname = "vfsv1"; | |
1912 | break; | |
1913 | } | |
1914 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1915 | } | |
1916 | ||
1917 | if (sbi->s_qf_names[USRQUOTA]) | |
a068acf2 | 1918 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
2adf6da8 TT |
1919 | |
1920 | if (sbi->s_qf_names[GRPQUOTA]) | |
a068acf2 | 1921 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
2adf6da8 TT |
1922 | #endif |
1923 | } | |
1924 | ||
5a916be1 TT |
1925 | static const char *token2str(int token) |
1926 | { | |
50df9fd5 | 1927 | const struct match_token *t; |
5a916be1 TT |
1928 | |
1929 | for (t = tokens; t->token != Opt_err; t++) | |
1930 | if (t->token == token && !strchr(t->pattern, '=')) | |
1931 | break; | |
1932 | return t->pattern; | |
1933 | } | |
1934 | ||
2adf6da8 TT |
1935 | /* |
1936 | * Show an option if | |
1937 | * - it's set to a non-default value OR | |
1938 | * - if the per-sb default is different from the global default | |
1939 | */ | |
66acdcf4 TT |
1940 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1941 | int nodefs) | |
2adf6da8 | 1942 | { |
2adf6da8 TT |
1943 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1944 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1945 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1946 | const struct mount_opts *m; |
66acdcf4 | 1947 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1948 | |
66acdcf4 TT |
1949 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1950 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1951 | |
1952 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1953 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1954 | ||
1955 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1956 | int want_set = m->flags & MOPT_SET; | |
1957 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1958 | (m->flags & MOPT_CLEAR_ERR)) | |
1959 | continue; | |
66acdcf4 | 1960 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1961 | continue; /* skip if same as the default */ |
1962 | if ((want_set && | |
1963 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1964 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1965 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1966 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1967 | } |
5a916be1 | 1968 | |
08cefc7a | 1969 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1970 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1971 | SEQ_OPTS_PRINT("resuid=%u", |
1972 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1973 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1974 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1975 | SEQ_OPTS_PRINT("resgid=%u", |
1976 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1977 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1978 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1979 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1980 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1981 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1982 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1983 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1984 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1985 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1986 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1987 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1988 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1989 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1990 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1991 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1992 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1993 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1994 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1995 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1996 | SEQ_OPTS_PUTS("data=journal"); | |
1997 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1998 | SEQ_OPTS_PUTS("data=ordered"); | |
1999 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
2000 | SEQ_OPTS_PUTS("data=writeback"); | |
2001 | } | |
66acdcf4 TT |
2002 | if (nodefs || |
2003 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
2004 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
2005 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 2006 | |
66acdcf4 TT |
2007 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
2008 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 2009 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
2010 | if (nodefs || sbi->s_max_dir_size_kb) |
2011 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
7915a861 AN |
2012 | if (test_opt(sb, DATA_ERR_ABORT)) |
2013 | SEQ_OPTS_PUTS("data_err=abort"); | |
2adf6da8 TT |
2014 | |
2015 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
2016 | return 0; |
2017 | } | |
2018 | ||
66acdcf4 TT |
2019 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
2020 | { | |
2021 | return _ext4_show_options(seq, root->d_sb, 0); | |
2022 | } | |
2023 | ||
ebd173be | 2024 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
2025 | { |
2026 | struct super_block *sb = seq->private; | |
2027 | int rc; | |
2028 | ||
2029 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
2030 | rc = _ext4_show_options(seq, sb, 1); | |
2031 | seq_puts(seq, "\n"); | |
2032 | return rc; | |
2033 | } | |
2034 | ||
617ba13b | 2035 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
2036 | int read_only) |
2037 | { | |
617ba13b | 2038 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
2039 | int res = 0; |
2040 | ||
617ba13b | 2041 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
2042 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
2043 | "forcing read-only mode"); | |
ac27a0ec DK |
2044 | res = MS_RDONLY; |
2045 | } | |
2046 | if (read_only) | |
281b5995 | 2047 | goto done; |
617ba13b | 2048 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
2049 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
2050 | "running e2fsck is recommended"); | |
c8b459f4 | 2051 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
2052 | ext4_msg(sb, KERN_WARNING, |
2053 | "warning: mounting fs with errors, " | |
2054 | "running e2fsck is recommended"); | |
ed3ce80a | 2055 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
2056 | le16_to_cpu(es->s_mnt_count) >= |
2057 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
2058 | ext4_msg(sb, KERN_WARNING, |
2059 | "warning: maximal mount count reached, " | |
2060 | "running e2fsck is recommended"); | |
ac27a0ec DK |
2061 | else if (le32_to_cpu(es->s_checkinterval) && |
2062 | (le32_to_cpu(es->s_lastcheck) + | |
2063 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
2064 | ext4_msg(sb, KERN_WARNING, |
2065 | "warning: checktime reached, " | |
2066 | "running e2fsck is recommended"); | |
0b8e58a1 | 2067 | if (!sbi->s_journal) |
0390131b | 2068 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 2069 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 2070 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 2071 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 2072 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 2073 | ext4_update_dynamic_rev(sb); |
0390131b | 2074 | if (sbi->s_journal) |
e2b911c5 | 2075 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 2076 | |
e2d67052 | 2077 | ext4_commit_super(sb, 1); |
281b5995 | 2078 | done: |
ac27a0ec | 2079 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 2080 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 2081 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
2082 | sb->s_blocksize, |
2083 | sbi->s_groups_count, | |
617ba13b MC |
2084 | EXT4_BLOCKS_PER_GROUP(sb), |
2085 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 2086 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 2087 | |
7abc52c2 | 2088 | cleancache_init_fs(sb); |
ac27a0ec DK |
2089 | return res; |
2090 | } | |
2091 | ||
117fff10 TT |
2092 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
2093 | { | |
2094 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2095 | struct flex_groups *new_groups; | |
2096 | int size; | |
2097 | ||
2098 | if (!sbi->s_log_groups_per_flex) | |
2099 | return 0; | |
2100 | ||
2101 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2102 | if (size <= sbi->s_flex_groups_allocated) | |
2103 | return 0; | |
2104 | ||
2105 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
2106 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
2107 | if (!new_groups) { | |
2108 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2109 | size / (int) sizeof(struct flex_groups)); | |
2110 | return -ENOMEM; | |
2111 | } | |
2112 | ||
2113 | if (sbi->s_flex_groups) { | |
2114 | memcpy(new_groups, sbi->s_flex_groups, | |
2115 | (sbi->s_flex_groups_allocated * | |
2116 | sizeof(struct flex_groups))); | |
b93b41d4 | 2117 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2118 | } |
2119 | sbi->s_flex_groups = new_groups; | |
2120 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2121 | return 0; | |
2122 | } | |
2123 | ||
772cb7c8 JS |
2124 | static int ext4_fill_flex_info(struct super_block *sb) |
2125 | { | |
2126 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2127 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2128 | ext4_group_t flex_group; |
117fff10 | 2129 | int i, err; |
772cb7c8 | 2130 | |
503358ae | 2131 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2132 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2133 | sbi->s_log_groups_per_flex = 0; |
2134 | return 1; | |
2135 | } | |
2136 | ||
117fff10 TT |
2137 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2138 | if (err) | |
9933fc0a | 2139 | goto failed; |
772cb7c8 | 2140 | |
772cb7c8 | 2141 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2142 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2143 | |
2144 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2145 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2146 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2147 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2148 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2149 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2150 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2151 | } |
2152 | ||
2153 | return 1; | |
2154 | failed: | |
2155 | return 0; | |
2156 | } | |
2157 | ||
e2b911c5 | 2158 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2159 | struct ext4_group_desc *gdp) |
717d50e4 | 2160 | { |
b47820ed | 2161 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
717d50e4 | 2162 | __u16 crc = 0; |
feb0ab32 | 2163 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2164 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2165 | |
9aa5d32b | 2166 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2167 | /* Use new metadata_csum algorithm */ |
feb0ab32 | 2168 | __u32 csum32; |
b47820ed | 2169 | __u16 dummy_csum = 0; |
feb0ab32 | 2170 | |
feb0ab32 DW |
2171 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
2172 | sizeof(le_group)); | |
b47820ed DJ |
2173 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
2174 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, | |
2175 | sizeof(dummy_csum)); | |
2176 | offset += sizeof(dummy_csum); | |
2177 | if (offset < sbi->s_desc_size) | |
2178 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, | |
2179 | sbi->s_desc_size - offset); | |
feb0ab32 DW |
2180 | |
2181 | crc = csum32 & 0xFFFF; | |
2182 | goto out; | |
717d50e4 AD |
2183 | } |
2184 | ||
feb0ab32 | 2185 | /* old crc16 code */ |
e2b911c5 | 2186 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2187 | return 0; |
2188 | ||
feb0ab32 DW |
2189 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
2190 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2191 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2192 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2193 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2194 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2195 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2196 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2197 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2198 | offset); | |
2199 | ||
2200 | out: | |
717d50e4 AD |
2201 | return cpu_to_le16(crc); |
2202 | } | |
2203 | ||
feb0ab32 | 2204 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2205 | struct ext4_group_desc *gdp) |
2206 | { | |
feb0ab32 | 2207 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2208 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2209 | return 0; |
2210 | ||
2211 | return 1; | |
2212 | } | |
2213 | ||
feb0ab32 DW |
2214 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2215 | struct ext4_group_desc *gdp) | |
2216 | { | |
2217 | if (!ext4_has_group_desc_csum(sb)) | |
2218 | return; | |
e2b911c5 | 2219 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2220 | } |
2221 | ||
ac27a0ec | 2222 | /* Called at mount-time, super-block is locked */ |
bfff6873 | 2223 | static int ext4_check_descriptors(struct super_block *sb, |
829fa70d | 2224 | ext4_fsblk_t sb_block, |
bfff6873 | 2225 | ext4_group_t *first_not_zeroed) |
ac27a0ec | 2226 | { |
617ba13b MC |
2227 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2228 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2229 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2230 | ext4_fsblk_t block_bitmap; |
2231 | ext4_fsblk_t inode_bitmap; | |
2232 | ext4_fsblk_t inode_table; | |
ce421581 | 2233 | int flexbg_flag = 0; |
bfff6873 | 2234 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2235 | |
e2b911c5 | 2236 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2237 | flexbg_flag = 1; |
2238 | ||
af5bc92d | 2239 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2240 | |
197cd65a AM |
2241 | for (i = 0; i < sbi->s_groups_count; i++) { |
2242 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2243 | ||
ce421581 | 2244 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2245 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2246 | else |
2247 | last_block = first_block + | |
617ba13b | 2248 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2249 | |
bfff6873 LC |
2250 | if ((grp == sbi->s_groups_count) && |
2251 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2252 | grp = i; | |
2253 | ||
8fadc143 | 2254 | block_bitmap = ext4_block_bitmap(sb, gdp); |
829fa70d TT |
2255 | if (block_bitmap == sb_block) { |
2256 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2257 | "Block bitmap for group %u overlaps " | |
2258 | "superblock", i); | |
2259 | } | |
2b2d6d01 | 2260 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2261 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2262 | "Block bitmap for group %u not in group " |
b31e1552 | 2263 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2264 | return 0; |
2265 | } | |
8fadc143 | 2266 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
829fa70d TT |
2267 | if (inode_bitmap == sb_block) { |
2268 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2269 | "Inode bitmap for group %u overlaps " | |
2270 | "superblock", i); | |
2271 | } | |
2b2d6d01 | 2272 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2273 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2274 | "Inode bitmap for group %u not in group " |
b31e1552 | 2275 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2276 | return 0; |
2277 | } | |
8fadc143 | 2278 | inode_table = ext4_inode_table(sb, gdp); |
829fa70d TT |
2279 | if (inode_table == sb_block) { |
2280 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2281 | "Inode table for group %u overlaps " | |
2282 | "superblock", i); | |
2283 | } | |
bd81d8ee | 2284 | if (inode_table < first_block || |
2b2d6d01 | 2285 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2286 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2287 | "Inode table for group %u not in group " |
b31e1552 | 2288 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2289 | return 0; |
2290 | } | |
955ce5f5 | 2291 | ext4_lock_group(sb, i); |
feb0ab32 | 2292 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2293 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2294 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2295 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2296 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
7ee1ec4c | 2297 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2298 | ext4_unlock_group(sb, i); |
8a266467 | 2299 | return 0; |
7ee1ec4c | 2300 | } |
717d50e4 | 2301 | } |
955ce5f5 | 2302 | ext4_unlock_group(sb, i); |
ce421581 JS |
2303 | if (!flexbg_flag) |
2304 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2305 | } |
bfff6873 LC |
2306 | if (NULL != first_not_zeroed) |
2307 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2308 | return 1; |
2309 | } | |
2310 | ||
617ba13b | 2311 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2312 | * the superblock) which were deleted from all directories, but held open by |
2313 | * a process at the time of a crash. We walk the list and try to delete these | |
2314 | * inodes at recovery time (only with a read-write filesystem). | |
2315 | * | |
2316 | * In order to keep the orphan inode chain consistent during traversal (in | |
2317 | * case of crash during recovery), we link each inode into the superblock | |
2318 | * orphan list_head and handle it the same way as an inode deletion during | |
2319 | * normal operation (which journals the operations for us). | |
2320 | * | |
2321 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2322 | * accidentally point at an in-use or already deleted inode. The worst that | |
2323 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2324 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2325 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2326 | * inode cleanup for us, so we can safely abort without any further action. | |
2327 | */ | |
2b2d6d01 TT |
2328 | static void ext4_orphan_cleanup(struct super_block *sb, |
2329 | struct ext4_super_block *es) | |
ac27a0ec DK |
2330 | { |
2331 | unsigned int s_flags = sb->s_flags; | |
2332 | int nr_orphans = 0, nr_truncates = 0; | |
2333 | #ifdef CONFIG_QUOTA | |
2334 | int i; | |
2335 | #endif | |
2336 | if (!es->s_last_orphan) { | |
2337 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2338 | return; | |
2339 | } | |
2340 | ||
a8f48a95 | 2341 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2342 | ext4_msg(sb, KERN_ERR, "write access " |
2343 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2344 | return; |
2345 | } | |
2346 | ||
d39195c3 AG |
2347 | /* Check if feature set would not allow a r/w mount */ |
2348 | if (!ext4_feature_set_ok(sb, 0)) { | |
2349 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2350 | "unknown ROCOMPAT features"); | |
2351 | return; | |
2352 | } | |
2353 | ||
617ba13b | 2354 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2355 | /* don't clear list on RO mount w/ errors */ |
2356 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2357 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2358 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2359 | es->s_last_orphan = 0; |
2360 | } | |
ac27a0ec DK |
2361 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2362 | return; | |
2363 | } | |
2364 | ||
2365 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2366 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2367 | sb->s_flags &= ~MS_RDONLY; |
2368 | } | |
2369 | #ifdef CONFIG_QUOTA | |
2370 | /* Needed for iput() to work correctly and not trash data */ | |
2371 | sb->s_flags |= MS_ACTIVE; | |
2372 | /* Turn on quotas so that they are updated correctly */ | |
a2d4a646 | 2373 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2374 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2375 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2376 | if (ret < 0) |
b31e1552 ES |
2377 | ext4_msg(sb, KERN_ERR, |
2378 | "Cannot turn on journaled " | |
2379 | "quota: error %d", ret); | |
ac27a0ec DK |
2380 | } |
2381 | } | |
2382 | #endif | |
2383 | ||
2384 | while (es->s_last_orphan) { | |
2385 | struct inode *inode; | |
2386 | ||
c65d5c6c VN |
2387 | /* |
2388 | * We may have encountered an error during cleanup; if | |
2389 | * so, skip the rest. | |
2390 | */ | |
2391 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { | |
2392 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2393 | es->s_last_orphan = 0; | |
2394 | break; | |
2395 | } | |
2396 | ||
97bd42b9 JB |
2397 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2398 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2399 | es->s_last_orphan = 0; |
2400 | break; | |
2401 | } | |
2402 | ||
617ba13b | 2403 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2404 | dquot_initialize(inode); |
ac27a0ec | 2405 | if (inode->i_nlink) { |
566370a2 PT |
2406 | if (test_opt(sb, DEBUG)) |
2407 | ext4_msg(sb, KERN_DEBUG, | |
2408 | "%s: truncating inode %lu to %lld bytes", | |
2409 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2410 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2411 | inode->i_ino, inode->i_size); |
5955102c | 2412 | inode_lock(inode); |
55f252c9 | 2413 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
617ba13b | 2414 | ext4_truncate(inode); |
5955102c | 2415 | inode_unlock(inode); |
ac27a0ec DK |
2416 | nr_truncates++; |
2417 | } else { | |
566370a2 PT |
2418 | if (test_opt(sb, DEBUG)) |
2419 | ext4_msg(sb, KERN_DEBUG, | |
2420 | "%s: deleting unreferenced inode %lu", | |
2421 | __func__, inode->i_ino); | |
ac27a0ec DK |
2422 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2423 | inode->i_ino); | |
2424 | nr_orphans++; | |
2425 | } | |
2426 | iput(inode); /* The delete magic happens here! */ | |
2427 | } | |
2428 | ||
2b2d6d01 | 2429 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2430 | |
2431 | if (nr_orphans) | |
b31e1552 ES |
2432 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2433 | PLURAL(nr_orphans)); | |
ac27a0ec | 2434 | if (nr_truncates) |
b31e1552 ES |
2435 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2436 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2437 | #ifdef CONFIG_QUOTA |
2438 | /* Turn quotas off */ | |
a2d4a646 | 2439 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
ac27a0ec | 2440 | if (sb_dqopt(sb)->files[i]) |
287a8095 | 2441 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2442 | } |
2443 | #endif | |
2444 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2445 | } | |
0b8e58a1 | 2446 | |
cd2291a4 ES |
2447 | /* |
2448 | * Maximal extent format file size. | |
2449 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2450 | * extent format containers, within a sector_t, and within i_blocks | |
2451 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2452 | * so that won't be a limiting factor. | |
2453 | * | |
f17722f9 LC |
2454 | * However there is other limiting factor. We do store extents in the form |
2455 | * of starting block and length, hence the resulting length of the extent | |
2456 | * covering maximum file size must fit into on-disk format containers as | |
2457 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2458 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2459 | * | |
cd2291a4 ES |
2460 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2461 | */ | |
f287a1a5 | 2462 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2463 | { |
2464 | loff_t res; | |
2465 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2466 | ||
2467 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2468 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2469 | /* |
90c699a9 | 2470 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2471 | * i_block represent total blocks in 512 bytes |
2472 | * 32 == size of vfs inode i_blocks * 8 | |
2473 | */ | |
2474 | upper_limit = (1LL << 32) - 1; | |
2475 | ||
2476 | /* total blocks in file system block size */ | |
2477 | upper_limit >>= (blkbits - 9); | |
2478 | upper_limit <<= blkbits; | |
2479 | } | |
2480 | ||
f17722f9 LC |
2481 | /* |
2482 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2483 | * by one fs block, so ee_len can cover the extent of maximum file | |
2484 | * size | |
2485 | */ | |
2486 | res = (1LL << 32) - 1; | |
cd2291a4 | 2487 | res <<= blkbits; |
cd2291a4 ES |
2488 | |
2489 | /* Sanity check against vm- & vfs- imposed limits */ | |
2490 | if (res > upper_limit) | |
2491 | res = upper_limit; | |
2492 | ||
2493 | return res; | |
2494 | } | |
ac27a0ec | 2495 | |
ac27a0ec | 2496 | /* |
cd2291a4 | 2497 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2498 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2499 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2500 | */ |
f287a1a5 | 2501 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2502 | { |
617ba13b | 2503 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2504 | int meta_blocks; |
2505 | loff_t upper_limit; | |
0b8e58a1 AD |
2506 | /* This is calculated to be the largest file size for a dense, block |
2507 | * mapped file such that the file's total number of 512-byte sectors, | |
2508 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2509 | * | |
2510 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2511 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2512 | */ |
2513 | ||
f287a1a5 | 2514 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2515 | /* |
90c699a9 | 2516 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2517 | * the inode i_block field represents total file blocks in |
2518 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2519 | */ |
2520 | upper_limit = (1LL << 32) - 1; | |
2521 | ||
2522 | /* total blocks in file system block size */ | |
2523 | upper_limit >>= (bits - 9); | |
2524 | ||
2525 | } else { | |
8180a562 AK |
2526 | /* |
2527 | * We use 48 bit ext4_inode i_blocks | |
2528 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2529 | * represent total number of blocks in | |
2530 | * file system block size | |
2531 | */ | |
0fc1b451 AK |
2532 | upper_limit = (1LL << 48) - 1; |
2533 | ||
0fc1b451 AK |
2534 | } |
2535 | ||
2536 | /* indirect blocks */ | |
2537 | meta_blocks = 1; | |
2538 | /* double indirect blocks */ | |
2539 | meta_blocks += 1 + (1LL << (bits-2)); | |
2540 | /* tripple indirect blocks */ | |
2541 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2542 | ||
2543 | upper_limit -= meta_blocks; | |
2544 | upper_limit <<= bits; | |
ac27a0ec DK |
2545 | |
2546 | res += 1LL << (bits-2); | |
2547 | res += 1LL << (2*(bits-2)); | |
2548 | res += 1LL << (3*(bits-2)); | |
2549 | res <<= bits; | |
2550 | if (res > upper_limit) | |
2551 | res = upper_limit; | |
0fc1b451 AK |
2552 | |
2553 | if (res > MAX_LFS_FILESIZE) | |
2554 | res = MAX_LFS_FILESIZE; | |
2555 | ||
ac27a0ec DK |
2556 | return res; |
2557 | } | |
2558 | ||
617ba13b | 2559 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2560 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2561 | { |
617ba13b | 2562 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2563 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2564 | int has_super = 0; |
2565 | ||
2566 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2567 | ||
e2b911c5 | 2568 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2569 | return logical_sb_block + nr + 1; |
ac27a0ec | 2570 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2571 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2572 | has_super = 1; |
0b8e58a1 | 2573 | |
bd63f6b0 DW |
2574 | /* |
2575 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2576 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2577 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2578 | * compensate. | |
2579 | */ | |
2580 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2581 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2582 | has_super++; | |
2583 | ||
617ba13b | 2584 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2585 | } |
2586 | ||
c9de560d AT |
2587 | /** |
2588 | * ext4_get_stripe_size: Get the stripe size. | |
2589 | * @sbi: In memory super block info | |
2590 | * | |
2591 | * If we have specified it via mount option, then | |
2592 | * use the mount option value. If the value specified at mount time is | |
2593 | * greater than the blocks per group use the super block value. | |
2594 | * If the super block value is greater than blocks per group return 0. | |
2595 | * Allocator needs it be less than blocks per group. | |
2596 | * | |
2597 | */ | |
2598 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2599 | { | |
2600 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2601 | unsigned long stripe_width = | |
2602 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2603 | int ret; |
c9de560d AT |
2604 | |
2605 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2606 | ret = sbi->s_stripe; |
2607 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2608 | ret = stripe_width; | |
2609 | else if (stride <= sbi->s_blocks_per_group) | |
2610 | ret = stride; | |
2611 | else | |
2612 | ret = 0; | |
c9de560d | 2613 | |
3eb08658 DE |
2614 | /* |
2615 | * If the stripe width is 1, this makes no sense and | |
2616 | * we set it to 0 to turn off stripe handling code. | |
2617 | */ | |
2618 | if (ret <= 1) | |
2619 | ret = 0; | |
c9de560d | 2620 | |
3eb08658 | 2621 | return ret; |
c9de560d | 2622 | } |
ac27a0ec | 2623 | |
a13fb1a4 ES |
2624 | /* |
2625 | * Check whether this filesystem can be mounted based on | |
2626 | * the features present and the RDONLY/RDWR mount requested. | |
2627 | * Returns 1 if this filesystem can be mounted as requested, | |
2628 | * 0 if it cannot be. | |
2629 | */ | |
2630 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2631 | { | |
e2b911c5 | 2632 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2633 | ext4_msg(sb, KERN_ERR, |
2634 | "Couldn't mount because of " | |
2635 | "unsupported optional features (%x)", | |
2636 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2637 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2641 | if (readonly) | |
2642 | return 1; | |
2643 | ||
e2b911c5 | 2644 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b DW |
2645 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
2646 | sb->s_flags |= MS_RDONLY; | |
2647 | return 1; | |
2648 | } | |
2649 | ||
a13fb1a4 | 2650 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2651 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2652 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2653 | "unsupported optional features (%x)", | |
2654 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2655 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2656 | return 0; | |
2657 | } | |
2658 | /* | |
2659 | * Large file size enabled file system can only be mounted | |
2660 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2661 | */ | |
e2b911c5 | 2662 | if (ext4_has_feature_huge_file(sb)) { |
a13fb1a4 ES |
2663 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
2664 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2665 | "cannot be mounted RDWR without " | |
2666 | "CONFIG_LBDAF"); | |
2667 | return 0; | |
2668 | } | |
2669 | } | |
e2b911c5 | 2670 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2671 | ext4_msg(sb, KERN_ERR, |
2672 | "Can't support bigalloc feature without " | |
2673 | "extents feature\n"); | |
2674 | return 0; | |
2675 | } | |
7c319d32 AK |
2676 | |
2677 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2678 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2679 | ext4_msg(sb, KERN_ERR, |
2680 | "Filesystem with quota feature cannot be mounted RDWR " | |
2681 | "without CONFIG_QUOTA"); | |
2682 | return 0; | |
2683 | } | |
689c958c LX |
2684 | if (ext4_has_feature_project(sb) && !readonly) { |
2685 | ext4_msg(sb, KERN_ERR, | |
2686 | "Filesystem with project quota feature cannot be mounted RDWR " | |
2687 | "without CONFIG_QUOTA"); | |
2688 | return 0; | |
2689 | } | |
7c319d32 | 2690 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
2691 | return 1; |
2692 | } | |
2693 | ||
66e61a9e TT |
2694 | /* |
2695 | * This function is called once a day if we have errors logged | |
2696 | * on the file system | |
2697 | */ | |
2698 | static void print_daily_error_info(unsigned long arg) | |
2699 | { | |
2700 | struct super_block *sb = (struct super_block *) arg; | |
2701 | struct ext4_sb_info *sbi; | |
2702 | struct ext4_super_block *es; | |
2703 | ||
2704 | sbi = EXT4_SB(sb); | |
2705 | es = sbi->s_es; | |
2706 | ||
2707 | if (es->s_error_count) | |
ae0f78de TT |
2708 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2709 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2710 | le32_to_cpu(es->s_error_count)); |
2711 | if (es->s_first_error_time) { | |
ae0f78de | 2712 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2713 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2714 | (int) sizeof(es->s_first_error_func), | |
2715 | es->s_first_error_func, | |
2716 | le32_to_cpu(es->s_first_error_line)); | |
2717 | if (es->s_first_error_ino) | |
2718 | printk(": inode %u", | |
2719 | le32_to_cpu(es->s_first_error_ino)); | |
2720 | if (es->s_first_error_block) | |
2721 | printk(": block %llu", (unsigned long long) | |
2722 | le64_to_cpu(es->s_first_error_block)); | |
2723 | printk("\n"); | |
2724 | } | |
2725 | if (es->s_last_error_time) { | |
ae0f78de | 2726 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2727 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2728 | (int) sizeof(es->s_last_error_func), | |
2729 | es->s_last_error_func, | |
2730 | le32_to_cpu(es->s_last_error_line)); | |
2731 | if (es->s_last_error_ino) | |
2732 | printk(": inode %u", | |
2733 | le32_to_cpu(es->s_last_error_ino)); | |
2734 | if (es->s_last_error_block) | |
2735 | printk(": block %llu", (unsigned long long) | |
2736 | le64_to_cpu(es->s_last_error_block)); | |
2737 | printk("\n"); | |
2738 | } | |
2739 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2740 | } | |
2741 | ||
bfff6873 LC |
2742 | /* Find next suitable group and run ext4_init_inode_table */ |
2743 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2744 | { | |
2745 | struct ext4_group_desc *gdp = NULL; | |
2746 | ext4_group_t group, ngroups; | |
2747 | struct super_block *sb; | |
2748 | unsigned long timeout = 0; | |
2749 | int ret = 0; | |
2750 | ||
2751 | sb = elr->lr_super; | |
2752 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2753 | ||
2754 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2755 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2756 | if (!gdp) { | |
2757 | ret = 1; | |
2758 | break; | |
2759 | } | |
2760 | ||
2761 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2762 | break; | |
2763 | } | |
2764 | ||
7f511862 | 2765 | if (group >= ngroups) |
bfff6873 LC |
2766 | ret = 1; |
2767 | ||
2768 | if (!ret) { | |
2769 | timeout = jiffies; | |
2770 | ret = ext4_init_inode_table(sb, group, | |
2771 | elr->lr_timeout ? 0 : 1); | |
2772 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2773 | timeout = (jiffies - timeout) * |
2774 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2775 | elr->lr_timeout = timeout; |
2776 | } | |
2777 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2778 | elr->lr_next_group = group + 1; | |
2779 | } | |
bfff6873 LC |
2780 | return ret; |
2781 | } | |
2782 | ||
2783 | /* | |
2784 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2785 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2786 | */ |
2787 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2788 | { | |
2789 | struct ext4_sb_info *sbi; | |
2790 | ||
2791 | if (!elr) | |
2792 | return; | |
2793 | ||
2794 | sbi = elr->lr_sbi; | |
2795 | ||
2796 | list_del(&elr->lr_request); | |
2797 | sbi->s_li_request = NULL; | |
2798 | kfree(elr); | |
2799 | } | |
2800 | ||
2801 | static void ext4_unregister_li_request(struct super_block *sb) | |
2802 | { | |
1bb933fb LC |
2803 | mutex_lock(&ext4_li_mtx); |
2804 | if (!ext4_li_info) { | |
2805 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2806 | return; |
1bb933fb | 2807 | } |
bfff6873 LC |
2808 | |
2809 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2810 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2811 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2812 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2813 | } |
2814 | ||
8f1f7453 ES |
2815 | static struct task_struct *ext4_lazyinit_task; |
2816 | ||
bfff6873 LC |
2817 | /* |
2818 | * This is the function where ext4lazyinit thread lives. It walks | |
2819 | * through the request list searching for next scheduled filesystem. | |
2820 | * When such a fs is found, run the lazy initialization request | |
2821 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2822 | * function. Based on that time we compute next schedule time of | |
2823 | * the request. When walking through the list is complete, compute | |
2824 | * next waking time and put itself into sleep. | |
2825 | */ | |
2826 | static int ext4_lazyinit_thread(void *arg) | |
2827 | { | |
2828 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2829 | struct list_head *pos, *n; | |
2830 | struct ext4_li_request *elr; | |
4ed5c033 | 2831 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2832 | |
2833 | BUG_ON(NULL == eli); | |
2834 | ||
bfff6873 LC |
2835 | cont_thread: |
2836 | while (true) { | |
2837 | next_wakeup = MAX_JIFFY_OFFSET; | |
2838 | ||
2839 | mutex_lock(&eli->li_list_mtx); | |
2840 | if (list_empty(&eli->li_request_list)) { | |
2841 | mutex_unlock(&eli->li_list_mtx); | |
2842 | goto exit_thread; | |
2843 | } | |
bfff6873 | 2844 | list_for_each_safe(pos, n, &eli->li_request_list) { |
e22834f0 DM |
2845 | int err = 0; |
2846 | int progress = 0; | |
bfff6873 LC |
2847 | elr = list_entry(pos, struct ext4_li_request, |
2848 | lr_request); | |
2849 | ||
e22834f0 DM |
2850 | if (time_before(jiffies, elr->lr_next_sched)) { |
2851 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2852 | next_wakeup = elr->lr_next_sched; | |
2853 | continue; | |
2854 | } | |
2855 | if (down_read_trylock(&elr->lr_super->s_umount)) { | |
2856 | if (sb_start_write_trylock(elr->lr_super)) { | |
2857 | progress = 1; | |
2858 | /* | |
2859 | * We hold sb->s_umount, sb can not | |
2860 | * be removed from the list, it is | |
2861 | * now safe to drop li_list_mtx | |
2862 | */ | |
2863 | mutex_unlock(&eli->li_list_mtx); | |
2864 | err = ext4_run_li_request(elr); | |
2865 | sb_end_write(elr->lr_super); | |
2866 | mutex_lock(&eli->li_list_mtx); | |
2867 | n = pos->next; | |
b2c78cd0 | 2868 | } |
e22834f0 DM |
2869 | up_read((&elr->lr_super->s_umount)); |
2870 | } | |
2871 | /* error, remove the lazy_init job */ | |
2872 | if (err) { | |
2873 | ext4_remove_li_request(elr); | |
2874 | continue; | |
2875 | } | |
2876 | if (!progress) { | |
2877 | elr->lr_next_sched = jiffies + | |
2878 | (prandom_u32() | |
2879 | % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 | 2880 | } |
bfff6873 LC |
2881 | if (time_before(elr->lr_next_sched, next_wakeup)) |
2882 | next_wakeup = elr->lr_next_sched; | |
2883 | } | |
2884 | mutex_unlock(&eli->li_list_mtx); | |
2885 | ||
a0acae0e | 2886 | try_to_freeze(); |
bfff6873 | 2887 | |
4ed5c033 LC |
2888 | cur = jiffies; |
2889 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2890 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2891 | cond_resched(); |
2892 | continue; | |
2893 | } | |
2894 | ||
4ed5c033 LC |
2895 | schedule_timeout_interruptible(next_wakeup - cur); |
2896 | ||
8f1f7453 ES |
2897 | if (kthread_should_stop()) { |
2898 | ext4_clear_request_list(); | |
2899 | goto exit_thread; | |
2900 | } | |
bfff6873 LC |
2901 | } |
2902 | ||
2903 | exit_thread: | |
2904 | /* | |
2905 | * It looks like the request list is empty, but we need | |
2906 | * to check it under the li_list_mtx lock, to prevent any | |
2907 | * additions into it, and of course we should lock ext4_li_mtx | |
2908 | * to atomically free the list and ext4_li_info, because at | |
2909 | * this point another ext4 filesystem could be registering | |
2910 | * new one. | |
2911 | */ | |
2912 | mutex_lock(&ext4_li_mtx); | |
2913 | mutex_lock(&eli->li_list_mtx); | |
2914 | if (!list_empty(&eli->li_request_list)) { | |
2915 | mutex_unlock(&eli->li_list_mtx); | |
2916 | mutex_unlock(&ext4_li_mtx); | |
2917 | goto cont_thread; | |
2918 | } | |
2919 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2920 | kfree(ext4_li_info); |
2921 | ext4_li_info = NULL; | |
2922 | mutex_unlock(&ext4_li_mtx); | |
2923 | ||
2924 | return 0; | |
2925 | } | |
2926 | ||
2927 | static void ext4_clear_request_list(void) | |
2928 | { | |
2929 | struct list_head *pos, *n; | |
2930 | struct ext4_li_request *elr; | |
2931 | ||
2932 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2933 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2934 | elr = list_entry(pos, struct ext4_li_request, | |
2935 | lr_request); | |
2936 | ext4_remove_li_request(elr); | |
2937 | } | |
2938 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2939 | } | |
2940 | ||
2941 | static int ext4_run_lazyinit_thread(void) | |
2942 | { | |
8f1f7453 ES |
2943 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2944 | ext4_li_info, "ext4lazyinit"); | |
2945 | if (IS_ERR(ext4_lazyinit_task)) { | |
2946 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2947 | ext4_clear_request_list(); |
bfff6873 LC |
2948 | kfree(ext4_li_info); |
2949 | ext4_li_info = NULL; | |
92b97816 | 2950 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2951 | "initialization thread\n", |
2952 | err); | |
2953 | return err; | |
2954 | } | |
2955 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2956 | return 0; |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * Check whether it make sense to run itable init. thread or not. | |
2961 | * If there is at least one uninitialized inode table, return | |
2962 | * corresponding group number, else the loop goes through all | |
2963 | * groups and return total number of groups. | |
2964 | */ | |
2965 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2966 | { | |
2967 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2968 | struct ext4_group_desc *gdp = NULL; | |
2969 | ||
2970 | for (group = 0; group < ngroups; group++) { | |
2971 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2972 | if (!gdp) | |
2973 | continue; | |
2974 | ||
2975 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2976 | break; | |
2977 | } | |
2978 | ||
2979 | return group; | |
2980 | } | |
2981 | ||
2982 | static int ext4_li_info_new(void) | |
2983 | { | |
2984 | struct ext4_lazy_init *eli = NULL; | |
2985 | ||
2986 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2987 | if (!eli) | |
2988 | return -ENOMEM; | |
2989 | ||
bfff6873 LC |
2990 | INIT_LIST_HEAD(&eli->li_request_list); |
2991 | mutex_init(&eli->li_list_mtx); | |
2992 | ||
bfff6873 LC |
2993 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2994 | ||
2995 | ext4_li_info = eli; | |
2996 | ||
2997 | return 0; | |
2998 | } | |
2999 | ||
3000 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3001 | ext4_group_t start) | |
3002 | { | |
3003 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3004 | struct ext4_li_request *elr; | |
bfff6873 LC |
3005 | |
3006 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3007 | if (!elr) | |
3008 | return NULL; | |
3009 | ||
3010 | elr->lr_super = sb; | |
3011 | elr->lr_sbi = sbi; | |
3012 | elr->lr_next_group = start; | |
3013 | ||
3014 | /* | |
3015 | * Randomize first schedule time of the request to | |
3016 | * spread the inode table initialization requests | |
3017 | * better. | |
3018 | */ | |
dd1f723b TT |
3019 | elr->lr_next_sched = jiffies + (prandom_u32() % |
3020 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
3021 | return elr; |
3022 | } | |
3023 | ||
7f511862 TT |
3024 | int ext4_register_li_request(struct super_block *sb, |
3025 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3026 | { |
3027 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3028 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3029 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3030 | int ret = 0; |
bfff6873 | 3031 | |
7f511862 | 3032 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3033 | if (sbi->s_li_request != NULL) { |
3034 | /* | |
3035 | * Reset timeout so it can be computed again, because | |
3036 | * s_li_wait_mult might have changed. | |
3037 | */ | |
3038 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3039 | goto out; |
51ce6511 | 3040 | } |
bfff6873 LC |
3041 | |
3042 | if (first_not_zeroed == ngroups || | |
3043 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3044 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3045 | goto out; |
bfff6873 LC |
3046 | |
3047 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3048 | if (!elr) { |
3049 | ret = -ENOMEM; | |
3050 | goto out; | |
3051 | } | |
bfff6873 LC |
3052 | |
3053 | if (NULL == ext4_li_info) { | |
3054 | ret = ext4_li_info_new(); | |
3055 | if (ret) | |
3056 | goto out; | |
3057 | } | |
3058 | ||
3059 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3060 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3061 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3062 | ||
3063 | sbi->s_li_request = elr; | |
46e4690b TM |
3064 | /* |
3065 | * set elr to NULL here since it has been inserted to | |
3066 | * the request_list and the removal and free of it is | |
3067 | * handled by ext4_clear_request_list from now on. | |
3068 | */ | |
3069 | elr = NULL; | |
bfff6873 LC |
3070 | |
3071 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3072 | ret = ext4_run_lazyinit_thread(); | |
3073 | if (ret) | |
3074 | goto out; | |
3075 | } | |
bfff6873 | 3076 | out: |
beed5ecb NK |
3077 | mutex_unlock(&ext4_li_mtx); |
3078 | if (ret) | |
bfff6873 | 3079 | kfree(elr); |
bfff6873 LC |
3080 | return ret; |
3081 | } | |
3082 | ||
3083 | /* | |
3084 | * We do not need to lock anything since this is called on | |
3085 | * module unload. | |
3086 | */ | |
3087 | static void ext4_destroy_lazyinit_thread(void) | |
3088 | { | |
3089 | /* | |
3090 | * If thread exited earlier | |
3091 | * there's nothing to be done. | |
3092 | */ | |
8f1f7453 | 3093 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3094 | return; |
3095 | ||
8f1f7453 | 3096 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3097 | } |
3098 | ||
25ed6e8a DW |
3099 | static int set_journal_csum_feature_set(struct super_block *sb) |
3100 | { | |
3101 | int ret = 1; | |
3102 | int compat, incompat; | |
3103 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3104 | ||
9aa5d32b | 3105 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 3106 | /* journal checksum v3 */ |
25ed6e8a | 3107 | compat = 0; |
db9ee220 | 3108 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
3109 | } else { |
3110 | /* journal checksum v1 */ | |
3111 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3112 | incompat = 0; | |
3113 | } | |
3114 | ||
feb8c6d3 DW |
3115 | jbd2_journal_clear_features(sbi->s_journal, |
3116 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3117 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
3118 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
3119 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3120 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3121 | compat, 0, | |
3122 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3123 | incompat); | |
3124 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3125 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3126 | compat, 0, | |
3127 | incompat); | |
3128 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3129 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3130 | } else { | |
feb8c6d3 DW |
3131 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3132 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
3133 | } |
3134 | ||
3135 | return ret; | |
3136 | } | |
3137 | ||
952fc18e TT |
3138 | /* |
3139 | * Note: calculating the overhead so we can be compatible with | |
3140 | * historical BSD practice is quite difficult in the face of | |
3141 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3142 | * different block group can end up in the same allocation cluster. | |
3143 | * Calculating the exact overhead in the face of clustered allocation | |
3144 | * requires either O(all block bitmaps) in memory or O(number of block | |
3145 | * groups**2) in time. We will still calculate the superblock for | |
3146 | * older file systems --- and if we come across with a bigalloc file | |
3147 | * system with zero in s_overhead_clusters the estimate will be close to | |
3148 | * correct especially for very large cluster sizes --- but for newer | |
3149 | * file systems, it's better to calculate this figure once at mkfs | |
3150 | * time, and store it in the superblock. If the superblock value is | |
3151 | * present (even for non-bigalloc file systems), we will use it. | |
3152 | */ | |
3153 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3154 | char *buf) | |
3155 | { | |
3156 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3157 | struct ext4_group_desc *gdp; | |
3158 | ext4_fsblk_t first_block, last_block, b; | |
3159 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3160 | int s, j, count = 0; | |
3161 | ||
e2b911c5 | 3162 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3163 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3164 | sbi->s_itb_per_group + 2); | |
3165 | ||
952fc18e TT |
3166 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3167 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3168 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3169 | for (i = 0; i < ngroups; i++) { | |
3170 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3171 | b = ext4_block_bitmap(sb, gdp); | |
3172 | if (b >= first_block && b <= last_block) { | |
3173 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3174 | count++; | |
3175 | } | |
3176 | b = ext4_inode_bitmap(sb, gdp); | |
3177 | if (b >= first_block && b <= last_block) { | |
3178 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3179 | count++; | |
3180 | } | |
3181 | b = ext4_inode_table(sb, gdp); | |
3182 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3183 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3184 | int c = EXT4_B2C(sbi, b - first_block); | |
3185 | ext4_set_bit(c, buf); | |
3186 | count++; | |
3187 | } | |
3188 | if (i != grp) | |
3189 | continue; | |
3190 | s = 0; | |
3191 | if (ext4_bg_has_super(sb, grp)) { | |
3192 | ext4_set_bit(s++, buf); | |
3193 | count++; | |
3194 | } | |
3195 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3196 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3197 | count++; | |
3198 | } | |
3199 | } | |
3200 | if (!count) | |
3201 | return 0; | |
3202 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3203 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3204 | } | |
3205 | ||
3206 | /* | |
3207 | * Compute the overhead and stash it in sbi->s_overhead | |
3208 | */ | |
3209 | int ext4_calculate_overhead(struct super_block *sb) | |
3210 | { | |
3211 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3212 | struct ext4_super_block *es = sbi->s_es; | |
3213 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3214 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3215 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3216 | |
952fc18e TT |
3217 | if (!buf) |
3218 | return -ENOMEM; | |
3219 | ||
3220 | /* | |
3221 | * Compute the overhead (FS structures). This is constant | |
3222 | * for a given filesystem unless the number of block groups | |
3223 | * changes so we cache the previous value until it does. | |
3224 | */ | |
3225 | ||
3226 | /* | |
3227 | * All of the blocks before first_data_block are overhead | |
3228 | */ | |
3229 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3230 | ||
3231 | /* | |
3232 | * Add the overhead found in each block group | |
3233 | */ | |
3234 | for (i = 0; i < ngroups; i++) { | |
3235 | int blks; | |
3236 | ||
3237 | blks = count_overhead(sb, i, buf); | |
3238 | overhead += blks; | |
3239 | if (blks) | |
3240 | memset(buf, 0, PAGE_SIZE); | |
3241 | cond_resched(); | |
3242 | } | |
b003b524 ES |
3243 | /* Add the internal journal blocks as well */ |
3244 | if (sbi->s_journal && !sbi->journal_bdev) | |
810da240 | 3245 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3246 | |
952fc18e TT |
3247 | sbi->s_overhead = overhead; |
3248 | smp_wmb(); | |
3249 | free_page((unsigned long) buf); | |
3250 | return 0; | |
3251 | } | |
3252 | ||
b5799018 | 3253 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3254 | { |
3255 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3256 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3257 | |
30fac0f7 JK |
3258 | /* |
3259 | * There's no need to reserve anything when we aren't using extents. | |
3260 | * The space estimates are exact, there are no unwritten extents, | |
3261 | * hole punching doesn't need new metadata... This is needed especially | |
3262 | * to keep ext2/3 backward compatibility. | |
3263 | */ | |
e2b911c5 | 3264 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3265 | return; |
27dd4385 LC |
3266 | /* |
3267 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3268 | * This should cover the situations where we can not afford to run | |
3269 | * out of space like for example punch hole, or converting | |
556615dc | 3270 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3271 | * allocation would require 1, or 2 blocks, higher numbers are |
3272 | * very rare. | |
3273 | */ | |
b5799018 TT |
3274 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3275 | sbi->s_cluster_bits); | |
27dd4385 LC |
3276 | |
3277 | do_div(resv_clusters, 50); | |
3278 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3279 | ||
b5799018 | 3280 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3281 | } |
3282 | ||
2b2d6d01 | 3283 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3284 | { |
d4c402d9 | 3285 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3286 | struct buffer_head *bh; |
617ba13b MC |
3287 | struct ext4_super_block *es = NULL; |
3288 | struct ext4_sb_info *sbi; | |
3289 | ext4_fsblk_t block; | |
3290 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3291 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3292 | unsigned long offset = 0; |
ac27a0ec DK |
3293 | unsigned long journal_devnum = 0; |
3294 | unsigned long def_mount_opts; | |
3295 | struct inode *root; | |
0390131b | 3296 | const char *descr; |
dcc7dae3 | 3297 | int ret = -ENOMEM; |
281b5995 | 3298 | int blocksize, clustersize; |
4ec11028 TT |
3299 | unsigned int db_count; |
3300 | unsigned int i; | |
281b5995 | 3301 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3302 | __u64 blocks_count; |
07aa2ea1 | 3303 | int err = 0; |
b3881f74 | 3304 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3305 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3306 | |
3307 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3308 | if (!sbi) | |
dcc7dae3 | 3309 | goto out_free_orig; |
705895b6 PE |
3310 | |
3311 | sbi->s_blockgroup_lock = | |
3312 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3313 | if (!sbi->s_blockgroup_lock) { | |
3314 | kfree(sbi); | |
dcc7dae3 | 3315 | goto out_free_orig; |
705895b6 | 3316 | } |
ac27a0ec | 3317 | sb->s_fs_info = sbi; |
2c0544b2 | 3318 | sbi->s_sb = sb; |
240799cd | 3319 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3320 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3321 | if (sb->s_bdev->bd_part) |
3322 | sbi->s_sectors_written_start = | |
3323 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3324 | |
9f6200bb | 3325 | /* Cleanup superblock name */ |
ec3904dc | 3326 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3327 | |
07aa2ea1 | 3328 | /* -EINVAL is default */ |
dcc7dae3 | 3329 | ret = -EINVAL; |
617ba13b | 3330 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3331 | if (!blocksize) { |
b31e1552 | 3332 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3333 | goto out_fail; |
3334 | } | |
3335 | ||
3336 | /* | |
617ba13b | 3337 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3338 | * block sizes. We need to calculate the offset from buffer start. |
3339 | */ | |
617ba13b | 3340 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3341 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3342 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3343 | } else { |
70bbb3e0 | 3344 | logical_sb_block = sb_block; |
ac27a0ec DK |
3345 | } |
3346 | ||
a8ac900b | 3347 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3348 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3349 | goto out_fail; |
3350 | } | |
3351 | /* | |
3352 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3353 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3354 | */ |
2716b802 | 3355 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3356 | sbi->s_es = es; |
3357 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3358 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3359 | goto cantfind_ext4; | |
afc32f7e | 3360 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3361 | |
feb0ab32 | 3362 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3363 | if (ext4_has_feature_metadata_csum(sb) && |
3364 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3365 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3366 | "redundant flags; please run fsck."); |
3367 | ||
d25425f8 DW |
3368 | /* Check for a known checksum algorithm */ |
3369 | if (!ext4_verify_csum_type(sb, es)) { | |
3370 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3371 | "unknown checksum algorithm."); | |
3372 | silent = 1; | |
3373 | goto cantfind_ext4; | |
3374 | } | |
3375 | ||
0441984a | 3376 | /* Load the checksum driver */ |
e2b911c5 | 3377 | if (ext4_has_feature_metadata_csum(sb)) { |
0441984a DW |
3378 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3379 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3380 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3381 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3382 | sbi->s_chksum_driver = NULL; | |
3383 | goto failed_mount; | |
3384 | } | |
3385 | } | |
3386 | ||
a9c47317 DW |
3387 | /* Check superblock checksum */ |
3388 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3389 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3390 | "invalid superblock checksum. Run e2fsck?"); | |
3391 | silent = 1; | |
6a797d27 | 3392 | ret = -EFSBADCRC; |
a9c47317 DW |
3393 | goto cantfind_ext4; |
3394 | } | |
3395 | ||
3396 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3397 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f DW |
3398 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
3399 | else if (ext4_has_metadata_csum(sb)) | |
a9c47317 DW |
3400 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3401 | sizeof(es->s_uuid)); | |
3402 | ||
ac27a0ec DK |
3403 | /* Set defaults before we parse the mount options */ |
3404 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3405 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3406 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3407 | set_opt(sb, DEBUG); |
87f26807 | 3408 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3409 | set_opt(sb, GRPID); |
617ba13b | 3410 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3411 | set_opt(sb, NO_UID32); |
ea663336 | 3412 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3413 | set_opt(sb, XATTR_USER); |
03010a33 | 3414 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3415 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3416 | #endif |
98c1a759 DW |
3417 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3418 | if (ext4_has_metadata_csum(sb)) | |
3419 | set_opt(sb, JOURNAL_CHECKSUM); | |
3420 | ||
617ba13b | 3421 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3422 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3423 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3424 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3425 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3426 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3427 | |
3428 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3429 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3430 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3431 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3432 | else |
fd8c37ec | 3433 | set_opt(sb, ERRORS_RO); |
45f1a9c3 DW |
3434 | /* block_validity enabled by default; disable with noblock_validity */ |
3435 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3436 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3437 | set_opt(sb, DISCARD); |
ac27a0ec | 3438 | |
08cefc7a EB |
3439 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3440 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3441 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3442 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3443 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3444 | |
8b67f04a | 3445 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3446 | set_opt(sb, BARRIER); |
ac27a0ec | 3447 | |
dd919b98 AK |
3448 | /* |
3449 | * enable delayed allocation by default | |
3450 | * Use -o nodelalloc to turn it off | |
3451 | */ | |
bc0b75f7 | 3452 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3453 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3454 | set_opt(sb, DELALLOC); |
dd919b98 | 3455 | |
51ce6511 LC |
3456 | /* |
3457 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3458 | * no mount option specified. | |
3459 | */ | |
3460 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3461 | ||
8b67f04a | 3462 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3463 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3464 | ext4_msg(sb, KERN_WARNING, |
3465 | "failed to parse options in superblock: %s", | |
3466 | sbi->s_es->s_mount_opts); | |
3467 | } | |
5a916be1 | 3468 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3469 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3470 | &journal_ioprio, 0)) |
ac27a0ec DK |
3471 | goto failed_mount; |
3472 | ||
56889787 TT |
3473 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3474 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3475 | "with data=journal disables delayed " | |
3476 | "allocation and O_DIRECT support!\n"); | |
3477 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3478 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3479 | "both data=journal and delalloc"); | |
3480 | goto failed_mount; | |
3481 | } | |
3482 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3483 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3484 | "both data=journal and dioread_nolock"); |
56889787 TT |
3485 | goto failed_mount; |
3486 | } | |
923ae0ff RZ |
3487 | if (test_opt(sb, DAX)) { |
3488 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3489 | "both data=journal and dax"); | |
3490 | goto failed_mount; | |
3491 | } | |
56889787 TT |
3492 | if (test_opt(sb, DELALLOC)) |
3493 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3494 | } else { |
3495 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3496 | } |
3497 | ||
ac27a0ec | 3498 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3499 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3500 | |
617ba13b | 3501 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3502 | (ext4_has_compat_features(sb) || |
3503 | ext4_has_ro_compat_features(sb) || | |
3504 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3505 | ext4_msg(sb, KERN_WARNING, |
3506 | "feature flags set on rev 0 fs, " | |
3507 | "running e2fsck is recommended"); | |
469108ff | 3508 | |
ed3654eb TT |
3509 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3510 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3511 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3512 | ext4_msg(sb, KERN_ERR, |
3513 | "The Hurd can't support 64-bit file systems"); | |
3514 | goto failed_mount; | |
3515 | } | |
3516 | } | |
3517 | ||
2035e776 TT |
3518 | if (IS_EXT2_SB(sb)) { |
3519 | if (ext2_feature_set_ok(sb)) | |
3520 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3521 | "using the ext4 subsystem"); | |
3522 | else { | |
3523 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3524 | "to feature incompatibilities"); | |
3525 | goto failed_mount; | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | if (IS_EXT3_SB(sb)) { | |
3530 | if (ext3_feature_set_ok(sb)) | |
3531 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3532 | "using the ext4 subsystem"); | |
3533 | else { | |
3534 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3535 | "to feature incompatibilities"); | |
3536 | goto failed_mount; | |
3537 | } | |
3538 | } | |
3539 | ||
ac27a0ec DK |
3540 | /* |
3541 | * Check feature flags regardless of the revision level, since we | |
3542 | * previously didn't change the revision level when setting the flags, | |
3543 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3544 | */ | |
a13fb1a4 | 3545 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3546 | goto failed_mount; |
a13fb1a4 | 3547 | |
261cb20c | 3548 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3549 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3550 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3551 | ext4_msg(sb, KERN_ERR, |
3552 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3553 | goto failed_mount; |
3554 | } | |
3555 | ||
5b9554dc TT |
3556 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { |
3557 | ext4_msg(sb, KERN_ERR, | |
3558 | "Number of reserved GDT blocks insanely large: %d", | |
3559 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); | |
3560 | goto failed_mount; | |
3561 | } | |
3562 | ||
923ae0ff | 3563 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
87eefeb4 TK |
3564 | err = bdev_dax_supported(sb, blocksize); |
3565 | if (err) | |
923ae0ff | 3566 | goto failed_mount; |
923ae0ff RZ |
3567 | } |
3568 | ||
e2b911c5 | 3569 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
3570 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
3571 | es->s_encryption_level); | |
3572 | goto failed_mount; | |
3573 | } | |
3574 | ||
ac27a0ec | 3575 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3576 | /* Validate the filesystem blocksize */ |
3577 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3578 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3579 | blocksize); |
ac27a0ec DK |
3580 | goto failed_mount; |
3581 | } | |
3582 | ||
2b2d6d01 | 3583 | brelse(bh); |
70bbb3e0 AM |
3584 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3585 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3586 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3587 | if (!bh) { |
b31e1552 ES |
3588 | ext4_msg(sb, KERN_ERR, |
3589 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3590 | goto failed_mount; |
3591 | } | |
2716b802 | 3592 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3593 | sbi->s_es = es; |
617ba13b | 3594 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3595 | ext4_msg(sb, KERN_ERR, |
3596 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3597 | goto failed_mount; |
3598 | } | |
3599 | } | |
3600 | ||
e2b911c5 | 3601 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
3602 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3603 | has_huge_files); | |
3604 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3605 | |
617ba13b MC |
3606 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3607 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3608 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3609 | } else { |
3610 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3611 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3612 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3613 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3614 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3615 | ext4_msg(sb, KERN_ERR, |
3616 | "unsupported inode size: %d", | |
2b2d6d01 | 3617 | sbi->s_inode_size); |
ac27a0ec DK |
3618 | goto failed_mount; |
3619 | } | |
ef7f3835 KS |
3620 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3621 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3622 | } |
0b8e58a1 | 3623 | |
0d1ee42f | 3624 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 3625 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 3626 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3627 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3628 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3629 | ext4_msg(sb, KERN_ERR, |
3630 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3631 | sbi->s_desc_size); |
3632 | goto failed_mount; | |
3633 | } | |
3634 | } else | |
3635 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3636 | |
ac27a0ec | 3637 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3638 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3639 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3640 | goto cantfind_ext4; |
0b8e58a1 | 3641 | |
617ba13b | 3642 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3643 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3644 | goto cantfind_ext4; |
ac27a0ec DK |
3645 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3646 | sbi->s_inodes_per_block; | |
0d1ee42f | 3647 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3648 | sbi->s_sbh = bh; |
3649 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3650 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3651 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3652 | |
2b2d6d01 | 3653 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3654 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3655 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 3656 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
3657 | i = le32_to_cpu(es->s_flags); |
3658 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3659 | sbi->s_hash_unsigned = 3; | |
3660 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3661 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3662 | if (!(sb->s_flags & MS_RDONLY)) |
3663 | es->s_flags |= | |
3664 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3665 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3666 | #else |
23301410 TT |
3667 | if (!(sb->s_flags & MS_RDONLY)) |
3668 | es->s_flags |= | |
3669 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3670 | #endif |
23301410 | 3671 | } |
f99b2589 | 3672 | } |
ac27a0ec | 3673 | |
281b5995 TT |
3674 | /* Handle clustersize */ |
3675 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 3676 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
3677 | if (has_bigalloc) { |
3678 | if (clustersize < blocksize) { | |
3679 | ext4_msg(sb, KERN_ERR, | |
3680 | "cluster size (%d) smaller than " | |
3681 | "block size (%d)", clustersize, blocksize); | |
3682 | goto failed_mount; | |
3683 | } | |
3684 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3685 | le32_to_cpu(es->s_log_block_size); | |
3686 | sbi->s_clusters_per_group = | |
3687 | le32_to_cpu(es->s_clusters_per_group); | |
3688 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3689 | ext4_msg(sb, KERN_ERR, | |
3690 | "#clusters per group too big: %lu", | |
3691 | sbi->s_clusters_per_group); | |
3692 | goto failed_mount; | |
3693 | } | |
3694 | if (sbi->s_blocks_per_group != | |
3695 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3696 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3697 | "clusters per group (%lu) inconsistent", | |
3698 | sbi->s_blocks_per_group, | |
3699 | sbi->s_clusters_per_group); | |
3700 | goto failed_mount; | |
3701 | } | |
3702 | } else { | |
3703 | if (clustersize != blocksize) { | |
3704 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3705 | "block size (%d)", clustersize, | |
3706 | blocksize); | |
3707 | clustersize = blocksize; | |
3708 | } | |
3709 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3710 | ext4_msg(sb, KERN_ERR, | |
3711 | "#blocks per group too big: %lu", | |
3712 | sbi->s_blocks_per_group); | |
3713 | goto failed_mount; | |
3714 | } | |
3715 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3716 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3717 | } |
281b5995 TT |
3718 | sbi->s_cluster_ratio = clustersize / blocksize; |
3719 | ||
ac27a0ec | 3720 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3721 | ext4_msg(sb, KERN_ERR, |
3722 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3723 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3724 | goto failed_mount; |
3725 | } | |
3726 | ||
960fd856 TT |
3727 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3728 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3729 | set_opt2(sb, STD_GROUP_SIZE); | |
3730 | ||
bf43d84b ES |
3731 | /* |
3732 | * Test whether we have more sectors than will fit in sector_t, | |
3733 | * and whether the max offset is addressable by the page cache. | |
3734 | */ | |
5a9ae68a | 3735 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3736 | ext4_blocks_count(es)); |
5a9ae68a | 3737 | if (err) { |
b31e1552 | 3738 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3739 | " too large to mount safely on this system"); |
ac27a0ec | 3740 | if (sizeof(sector_t) < 8) |
90c699a9 | 3741 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3742 | goto failed_mount; |
3743 | } | |
3744 | ||
617ba13b MC |
3745 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3746 | goto cantfind_ext4; | |
e7c95593 | 3747 | |
0f2ddca6 FTN |
3748 | /* check blocks count against device size */ |
3749 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3750 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3751 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3752 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3753 | ext4_blocks_count(es), blocks_count); |
3754 | goto failed_mount; | |
3755 | } | |
3756 | ||
0b8e58a1 AD |
3757 | /* |
3758 | * It makes no sense for the first data block to be beyond the end | |
3759 | * of the filesystem. | |
3760 | */ | |
3761 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3762 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3763 | "block %u is beyond end of filesystem (%llu)", |
3764 | le32_to_cpu(es->s_first_data_block), | |
3765 | ext4_blocks_count(es)); | |
e7c95593 ES |
3766 | goto failed_mount; |
3767 | } | |
bd81d8ee LV |
3768 | blocks_count = (ext4_blocks_count(es) - |
3769 | le32_to_cpu(es->s_first_data_block) + | |
3770 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3771 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3772 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3773 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3774 | "(block count %llu, first data block %u, " |
b31e1552 | 3775 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3776 | ext4_blocks_count(es), |
3777 | le32_to_cpu(es->s_first_data_block), | |
3778 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3779 | goto failed_mount; | |
3780 | } | |
bd81d8ee | 3781 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3782 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3783 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3784 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3785 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3786 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3787 | sizeof(struct buffer_head *), | |
3788 | GFP_KERNEL); | |
ac27a0ec | 3789 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3790 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3791 | ret = -ENOMEM; |
ac27a0ec DK |
3792 | goto failed_mount; |
3793 | } | |
3794 | ||
705895b6 | 3795 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3796 | |
3797 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3798 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 3799 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 3800 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
3801 | ext4_msg(sb, KERN_ERR, |
3802 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3803 | db_count = i; |
3804 | goto failed_mount2; | |
3805 | } | |
3806 | } | |
829fa70d | 3807 | if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { |
b31e1552 | 3808 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 3809 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 3810 | goto failed_mount2; |
ac27a0ec | 3811 | } |
772cb7c8 | 3812 | |
f9ae9cf5 | 3813 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
3814 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
3815 | spin_lock_init(&sbi->s_next_gen_lock); | |
3816 | ||
04ecddb7 JM |
3817 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
3818 | (unsigned long) sb); | |
04496411 | 3819 | |
a75ae78f | 3820 | /* Register extent status tree shrinker */ |
eb68d0e2 | 3821 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 3822 | goto failed_mount3; |
ce7e010a | 3823 | |
c9de560d | 3824 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3825 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3826 | |
f9ae9cf5 TT |
3827 | /* |
3828 | * set up enough so that it can read an inode | |
3829 | */ | |
f6e63f90 | 3830 | sb->s_op = &ext4_sops; |
617ba13b MC |
3831 | sb->s_export_op = &ext4_export_ops; |
3832 | sb->s_xattr = ext4_xattr_handlers; | |
a7550b30 | 3833 | sb->s_cop = &ext4_cryptops; |
ac27a0ec | 3834 | #ifdef CONFIG_QUOTA |
617ba13b | 3835 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 3836 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 3837 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
3838 | else |
3839 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 3840 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 3841 | #endif |
f2fa2ffc AK |
3842 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3843 | ||
ac27a0ec | 3844 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3845 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3846 | |
3847 | sb->s_root = NULL; | |
3848 | ||
3849 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 3850 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 3851 | |
e2b911c5 | 3852 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
c5e06d10 | 3853 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 3854 | goto failed_mount3a; |
c5e06d10 | 3855 | |
ac27a0ec DK |
3856 | /* |
3857 | * The first inode we look at is the journal inode. Don't try | |
3858 | * root first: it may be modified in the journal! | |
3859 | */ | |
e2b911c5 | 3860 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
617ba13b | 3861 | if (ext4_load_journal(sb, es, journal_devnum)) |
50460fe8 | 3862 | goto failed_mount3a; |
0390131b | 3863 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
e2b911c5 | 3864 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
3865 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3866 | "suppressed and not mounted read-only"); | |
744692dc | 3867 | goto failed_mount_wq; |
ac27a0ec | 3868 | } else { |
1e381f60 DM |
3869 | /* Nojournal mode, all journal mount options are illegal */ |
3870 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
3871 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3872 | "journal_checksum, fs mounted w/o journal"); | |
3873 | goto failed_mount_wq; | |
3874 | } | |
3875 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3876 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3877 | "journal_async_commit, fs mounted w/o journal"); | |
3878 | goto failed_mount_wq; | |
3879 | } | |
3880 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
3881 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3882 | "commit=%lu, fs mounted w/o journal", | |
3883 | sbi->s_commit_interval / HZ); | |
3884 | goto failed_mount_wq; | |
3885 | } | |
3886 | if (EXT4_MOUNT_DATA_FLAGS & | |
3887 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
3888 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3889 | "data=, fs mounted w/o journal"); | |
3890 | goto failed_mount_wq; | |
3891 | } | |
3892 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
3893 | clear_opt(sb, JOURNAL_CHECKSUM); | |
fd8c37ec | 3894 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3895 | sbi->s_journal = NULL; |
3896 | needs_recovery = 0; | |
3897 | goto no_journal; | |
ac27a0ec DK |
3898 | } |
3899 | ||
e2b911c5 | 3900 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
3901 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3902 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3903 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3904 | goto failed_mount_wq; |
eb40a09c JS |
3905 | } |
3906 | ||
25ed6e8a DW |
3907 | if (!set_journal_csum_feature_set(sb)) { |
3908 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3909 | "feature set"); | |
3910 | goto failed_mount_wq; | |
d4da6c9c | 3911 | } |
818d276c | 3912 | |
ac27a0ec DK |
3913 | /* We have now updated the journal if required, so we can |
3914 | * validate the data journaling mode. */ | |
3915 | switch (test_opt(sb, DATA_FLAGS)) { | |
3916 | case 0: | |
3917 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3918 | * capabilities: ORDERED_DATA if the journal can |
3919 | * cope, else JOURNAL_DATA | |
3920 | */ | |
dab291af MC |
3921 | if (jbd2_journal_check_available_features |
3922 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3923 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3924 | else |
fd8c37ec | 3925 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3926 | break; |
3927 | ||
617ba13b MC |
3928 | case EXT4_MOUNT_ORDERED_DATA: |
3929 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3930 | if (!jbd2_journal_check_available_features |
3931 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3932 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3933 | "requested data journaling mode"); | |
744692dc | 3934 | goto failed_mount_wq; |
ac27a0ec DK |
3935 | } |
3936 | default: | |
3937 | break; | |
3938 | } | |
b3881f74 | 3939 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3940 | |
18aadd47 BJ |
3941 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3942 | ||
ce7e010a | 3943 | no_journal: |
2335d05f AG |
3944 | sbi->s_mb_cache = ext4_xattr_create_cache(); |
3945 | if (!sbi->s_mb_cache) { | |
3946 | ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); | |
3947 | goto failed_mount_wq; | |
9c191f70 M |
3948 | } |
3949 | ||
e2b911c5 | 3950 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
09cbfeaf | 3951 | (blocksize != PAGE_SIZE)) { |
1cb767cd TT |
3952 | ext4_msg(sb, KERN_ERR, |
3953 | "Unsupported blocksize for fs encryption"); | |
3954 | goto failed_mount_wq; | |
3955 | } | |
3956 | ||
e2b911c5 DW |
3957 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
3958 | !ext4_has_feature_encrypt(sb)) { | |
3959 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
3960 | ext4_commit_super(sb, 1); |
3961 | } | |
3962 | ||
952fc18e TT |
3963 | /* |
3964 | * Get the # of file system overhead blocks from the | |
3965 | * superblock if present. | |
3966 | */ | |
3967 | if (es->s_overhead_clusters) | |
3968 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3969 | else { | |
07aa2ea1 LC |
3970 | err = ext4_calculate_overhead(sb); |
3971 | if (err) | |
952fc18e TT |
3972 | goto failed_mount_wq; |
3973 | } | |
3974 | ||
fd89d5f2 TH |
3975 | /* |
3976 | * The maximum number of concurrent works can be high and | |
3977 | * concurrency isn't really necessary. Limit it to 1. | |
3978 | */ | |
2e8fa54e JK |
3979 | EXT4_SB(sb)->rsv_conversion_wq = |
3980 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
3981 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
3982 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 3983 | ret = -ENOMEM; |
2e8fa54e JK |
3984 | goto failed_mount4; |
3985 | } | |
3986 | ||
ac27a0ec | 3987 | /* |
dab291af | 3988 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3989 | * so we can safely mount the rest of the filesystem now. |
3990 | */ | |
3991 | ||
1d1fe1ee DH |
3992 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3993 | if (IS_ERR(root)) { | |
b31e1552 | 3994 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3995 | ret = PTR_ERR(root); |
32a9bb57 | 3996 | root = NULL; |
ac27a0ec DK |
3997 | goto failed_mount4; |
3998 | } | |
3999 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4000 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4001 | iput(root); |
ac27a0ec DK |
4002 | goto failed_mount4; |
4003 | } | |
48fde701 | 4004 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4005 | if (!sb->s_root) { |
b31e1552 | 4006 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4007 | ret = -ENOMEM; |
4008 | goto failed_mount4; | |
4009 | } | |
ac27a0ec | 4010 | |
7e84b621 ES |
4011 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
4012 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
4013 | |
4014 | /* determine the minimum size of new large inodes, if present */ | |
4015 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
4016 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4017 | EXT4_GOOD_OLD_INODE_SIZE; | |
e2b911c5 | 4018 | if (ext4_has_feature_extra_isize(sb)) { |
ef7f3835 KS |
4019 | if (sbi->s_want_extra_isize < |
4020 | le16_to_cpu(es->s_want_extra_isize)) | |
4021 | sbi->s_want_extra_isize = | |
4022 | le16_to_cpu(es->s_want_extra_isize); | |
4023 | if (sbi->s_want_extra_isize < | |
4024 | le16_to_cpu(es->s_min_extra_isize)) | |
4025 | sbi->s_want_extra_isize = | |
4026 | le16_to_cpu(es->s_min_extra_isize); | |
4027 | } | |
4028 | } | |
4029 | /* Check if enough inode space is available */ | |
4030 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
4031 | sbi->s_inode_size) { | |
4032 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4033 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
4034 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
4035 | "available"); | |
ef7f3835 KS |
4036 | } |
4037 | ||
b5799018 | 4038 | ext4_set_resv_clusters(sb); |
27dd4385 | 4039 | |
6fd058f7 TT |
4040 | err = ext4_setup_system_zone(sb); |
4041 | if (err) { | |
b31e1552 | 4042 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4043 | "zone (%d)", err); |
f9ae9cf5 TT |
4044 | goto failed_mount4a; |
4045 | } | |
4046 | ||
4047 | ext4_ext_init(sb); | |
4048 | err = ext4_mb_init(sb); | |
4049 | if (err) { | |
4050 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
4051 | err); | |
dcf2d804 | 4052 | goto failed_mount5; |
c2774d84 AK |
4053 | } |
4054 | ||
d5e03cbb TT |
4055 | block = ext4_count_free_clusters(sb); |
4056 | ext4_free_blocks_count_set(sbi->s_es, | |
4057 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
4058 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
4059 | GFP_KERNEL); | |
d5e03cbb TT |
4060 | if (!err) { |
4061 | unsigned long freei = ext4_count_free_inodes(sb); | |
4062 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
4063 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
4064 | GFP_KERNEL); | |
d5e03cbb TT |
4065 | } |
4066 | if (!err) | |
4067 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 4068 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 4069 | if (!err) |
908c7f19 TH |
4070 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
4071 | GFP_KERNEL); | |
c8585c6f DJ |
4072 | if (!err) |
4073 | err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); | |
4074 | ||
d5e03cbb TT |
4075 | if (err) { |
4076 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
4077 | goto failed_mount6; | |
4078 | } | |
4079 | ||
e2b911c5 | 4080 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
4081 | if (!ext4_fill_flex_info(sb)) { |
4082 | ext4_msg(sb, KERN_ERR, | |
4083 | "unable to initialize " | |
4084 | "flex_bg meta info!"); | |
4085 | goto failed_mount6; | |
4086 | } | |
4087 | ||
bfff6873 LC |
4088 | err = ext4_register_li_request(sb, first_not_zeroed); |
4089 | if (err) | |
dcf2d804 | 4090 | goto failed_mount6; |
bfff6873 | 4091 | |
b5799018 | 4092 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
4093 | if (err) |
4094 | goto failed_mount7; | |
3197ebdb | 4095 | |
9b2ff357 JK |
4096 | #ifdef CONFIG_QUOTA |
4097 | /* Enable quota usage during mount. */ | |
e2b911c5 | 4098 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
9b2ff357 JK |
4099 | err = ext4_enable_quotas(sb); |
4100 | if (err) | |
4101 | goto failed_mount8; | |
4102 | } | |
4103 | #endif /* CONFIG_QUOTA */ | |
4104 | ||
617ba13b MC |
4105 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4106 | ext4_orphan_cleanup(sb, es); | |
4107 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4108 | if (needs_recovery) { |
b31e1552 | 4109 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4110 | ext4_mark_recovery_complete(sb, es); |
4111 | } | |
4112 | if (EXT4_SB(sb)->s_journal) { | |
4113 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4114 | descr = " journalled data mode"; | |
4115 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4116 | descr = " ordered data mode"; | |
4117 | else | |
4118 | descr = " writeback data mode"; | |
4119 | } else | |
4120 | descr = "out journal"; | |
4121 | ||
79add3a3 LC |
4122 | if (test_opt(sb, DISCARD)) { |
4123 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4124 | if (!blk_queue_discard(q)) | |
4125 | ext4_msg(sb, KERN_WARNING, | |
4126 | "mounting with \"discard\" option, but " | |
4127 | "the device does not support discard"); | |
4128 | } | |
4129 | ||
e294a537 TT |
4130 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
4131 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
4132 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, | |
4133 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4134 | |
66e61a9e TT |
4135 | if (es->s_error_count) |
4136 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4137 | |
efbed4dc TT |
4138 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
4139 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
4140 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
4141 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
4142 | ||
d4c402d9 | 4143 | kfree(orig_data); |
a7550b30 JK |
4144 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
4145 | memcpy(sbi->key_prefix, EXT4_KEY_DESC_PREFIX, | |
4146 | EXT4_KEY_DESC_PREFIX_SIZE); | |
4147 | sbi->key_prefix_size = EXT4_KEY_DESC_PREFIX_SIZE; | |
4148 | #endif | |
ac27a0ec DK |
4149 | return 0; |
4150 | ||
617ba13b | 4151 | cantfind_ext4: |
ac27a0ec | 4152 | if (!silent) |
b31e1552 | 4153 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4154 | goto failed_mount; |
4155 | ||
72ba7450 TT |
4156 | #ifdef CONFIG_QUOTA |
4157 | failed_mount8: | |
ebd173be | 4158 | ext4_unregister_sysfs(sb); |
72ba7450 | 4159 | #endif |
dcf2d804 TM |
4160 | failed_mount7: |
4161 | ext4_unregister_li_request(sb); | |
4162 | failed_mount6: | |
f9ae9cf5 | 4163 | ext4_mb_release(sb); |
d5e03cbb | 4164 | if (sbi->s_flex_groups) |
b93b41d4 | 4165 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4166 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4167 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4168 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4169 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4170 | failed_mount5: |
f9ae9cf5 TT |
4171 | ext4_ext_release(sb); |
4172 | ext4_release_system_zone(sb); | |
4173 | failed_mount4a: | |
94bf608a | 4174 | dput(sb->s_root); |
32a9bb57 | 4175 | sb->s_root = NULL; |
94bf608a | 4176 | failed_mount4: |
b31e1552 | 4177 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4178 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4179 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4180 | failed_mount_wq: |
82939d79 JK |
4181 | if (sbi->s_mb_cache) { |
4182 | ext4_xattr_destroy_cache(sbi->s_mb_cache); | |
4183 | sbi->s_mb_cache = NULL; | |
4184 | } | |
0390131b FM |
4185 | if (sbi->s_journal) { |
4186 | jbd2_journal_destroy(sbi->s_journal); | |
4187 | sbi->s_journal = NULL; | |
4188 | } | |
50460fe8 | 4189 | failed_mount3a: |
d3922a77 | 4190 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4191 | failed_mount3: |
9105bb14 | 4192 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4193 | if (sbi->s_mmp_tsk) |
4194 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4195 | failed_mount2: |
4196 | for (i = 0; i < db_count; i++) | |
4197 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4198 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4199 | failed_mount: |
0441984a DW |
4200 | if (sbi->s_chksum_driver) |
4201 | crypto_free_shash(sbi->s_chksum_driver); | |
ac27a0ec | 4202 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4203 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4204 | kfree(sbi->s_qf_names[i]); |
4205 | #endif | |
617ba13b | 4206 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4207 | brelse(bh); |
4208 | out_fail: | |
4209 | sb->s_fs_info = NULL; | |
f6830165 | 4210 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4211 | kfree(sbi); |
dcc7dae3 | 4212 | out_free_orig: |
d4c402d9 | 4213 | kfree(orig_data); |
07aa2ea1 | 4214 | return err ? err : ret; |
ac27a0ec DK |
4215 | } |
4216 | ||
4217 | /* | |
4218 | * Setup any per-fs journal parameters now. We'll do this both on | |
4219 | * initial mount, once the journal has been initialised but before we've | |
4220 | * done any recovery; and again on any subsequent remount. | |
4221 | */ | |
617ba13b | 4222 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4223 | { |
617ba13b | 4224 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4225 | |
30773840 TT |
4226 | journal->j_commit_interval = sbi->s_commit_interval; |
4227 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4228 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4229 | |
a931da6a | 4230 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4231 | if (test_opt(sb, BARRIER)) |
dab291af | 4232 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4233 | else |
dab291af | 4234 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4235 | if (test_opt(sb, DATA_ERR_ABORT)) |
4236 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4237 | else | |
4238 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4239 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4240 | } |
4241 | ||
c6cb7e77 EW |
4242 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
4243 | unsigned int journal_inum) | |
ac27a0ec DK |
4244 | { |
4245 | struct inode *journal_inode; | |
ac27a0ec | 4246 | |
c6cb7e77 EW |
4247 | /* |
4248 | * Test for the existence of a valid inode on disk. Bad things | |
4249 | * happen if we iget() an unused inode, as the subsequent iput() | |
4250 | * will try to delete it. | |
4251 | */ | |
1d1fe1ee DH |
4252 | journal_inode = ext4_iget(sb, journal_inum); |
4253 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4254 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4255 | return NULL; |
4256 | } | |
4257 | if (!journal_inode->i_nlink) { | |
4258 | make_bad_inode(journal_inode); | |
4259 | iput(journal_inode); | |
b31e1552 | 4260 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4261 | return NULL; |
4262 | } | |
4263 | ||
e5f8eab8 | 4264 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4265 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4266 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4267 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4268 | iput(journal_inode); |
4269 | return NULL; | |
4270 | } | |
c6cb7e77 EW |
4271 | return journal_inode; |
4272 | } | |
4273 | ||
4274 | static journal_t *ext4_get_journal(struct super_block *sb, | |
4275 | unsigned int journal_inum) | |
4276 | { | |
4277 | struct inode *journal_inode; | |
4278 | journal_t *journal; | |
4279 | ||
4280 | BUG_ON(!ext4_has_feature_journal(sb)); | |
4281 | ||
4282 | journal_inode = ext4_get_journal_inode(sb, journal_inum); | |
4283 | if (!journal_inode) | |
4284 | return NULL; | |
ac27a0ec | 4285 | |
dab291af | 4286 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4287 | if (!journal) { |
b31e1552 | 4288 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4289 | iput(journal_inode); |
4290 | return NULL; | |
4291 | } | |
4292 | journal->j_private = sb; | |
617ba13b | 4293 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4294 | return journal; |
4295 | } | |
4296 | ||
617ba13b | 4297 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4298 | dev_t j_dev) |
4299 | { | |
2b2d6d01 | 4300 | struct buffer_head *bh; |
ac27a0ec | 4301 | journal_t *journal; |
617ba13b MC |
4302 | ext4_fsblk_t start; |
4303 | ext4_fsblk_t len; | |
ac27a0ec | 4304 | int hblock, blocksize; |
617ba13b | 4305 | ext4_fsblk_t sb_block; |
ac27a0ec | 4306 | unsigned long offset; |
2b2d6d01 | 4307 | struct ext4_super_block *es; |
ac27a0ec DK |
4308 | struct block_device *bdev; |
4309 | ||
e2b911c5 | 4310 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4311 | |
b31e1552 | 4312 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4313 | if (bdev == NULL) |
4314 | return NULL; | |
4315 | ||
ac27a0ec | 4316 | blocksize = sb->s_blocksize; |
e1defc4f | 4317 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4318 | if (blocksize < hblock) { |
b31e1552 ES |
4319 | ext4_msg(sb, KERN_ERR, |
4320 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4321 | goto out_bdev; |
4322 | } | |
4323 | ||
617ba13b MC |
4324 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4325 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4326 | set_blocksize(bdev, blocksize); |
4327 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4328 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4329 | "external journal"); | |
ac27a0ec DK |
4330 | goto out_bdev; |
4331 | } | |
4332 | ||
2716b802 | 4333 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4334 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4335 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4336 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4337 | ext4_msg(sb, KERN_ERR, "external journal has " |
4338 | "bad superblock"); | |
ac27a0ec DK |
4339 | brelse(bh); |
4340 | goto out_bdev; | |
4341 | } | |
4342 | ||
df4763be DW |
4343 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4344 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4345 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4346 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4347 | "corrupt superblock"); | |
4348 | brelse(bh); | |
4349 | goto out_bdev; | |
4350 | } | |
4351 | ||
617ba13b | 4352 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4353 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4354 | brelse(bh); |
4355 | goto out_bdev; | |
4356 | } | |
4357 | ||
bd81d8ee | 4358 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4359 | start = sb_block + 1; |
4360 | brelse(bh); /* we're done with the superblock */ | |
4361 | ||
dab291af | 4362 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4363 | start, len, blocksize); |
4364 | if (!journal) { | |
b31e1552 | 4365 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4366 | goto out_bdev; |
4367 | } | |
4368 | journal->j_private = sb; | |
dfec8a14 | 4369 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4370 | wait_on_buffer(journal->j_sb_buffer); |
4371 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4372 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4373 | goto out_journal; |
4374 | } | |
4375 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4376 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4377 | "user (unsupported) - %d", | |
ac27a0ec DK |
4378 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4379 | goto out_journal; | |
4380 | } | |
617ba13b MC |
4381 | EXT4_SB(sb)->journal_bdev = bdev; |
4382 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4383 | return journal; |
0b8e58a1 | 4384 | |
ac27a0ec | 4385 | out_journal: |
dab291af | 4386 | jbd2_journal_destroy(journal); |
ac27a0ec | 4387 | out_bdev: |
617ba13b | 4388 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4389 | return NULL; |
4390 | } | |
4391 | ||
617ba13b MC |
4392 | static int ext4_load_journal(struct super_block *sb, |
4393 | struct ext4_super_block *es, | |
ac27a0ec DK |
4394 | unsigned long journal_devnum) |
4395 | { | |
4396 | journal_t *journal; | |
4397 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4398 | dev_t journal_dev; | |
4399 | int err = 0; | |
4400 | int really_read_only; | |
4401 | ||
e2b911c5 | 4402 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4403 | |
ac27a0ec DK |
4404 | if (journal_devnum && |
4405 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4406 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4407 | "numbers have changed"); | |
ac27a0ec DK |
4408 | journal_dev = new_decode_dev(journal_devnum); |
4409 | } else | |
4410 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4411 | ||
4412 | really_read_only = bdev_read_only(sb->s_bdev); | |
4413 | ||
4414 | /* | |
4415 | * Are we loading a blank journal or performing recovery after a | |
4416 | * crash? For recovery, we need to check in advance whether we | |
4417 | * can get read-write access to the device. | |
4418 | */ | |
e2b911c5 | 4419 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
ac27a0ec | 4420 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4421 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4422 | "required on readonly filesystem"); | |
ac27a0ec | 4423 | if (really_read_only) { |
b31e1552 ES |
4424 | ext4_msg(sb, KERN_ERR, "write access " |
4425 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4426 | return -EROFS; |
4427 | } | |
b31e1552 ES |
4428 | ext4_msg(sb, KERN_INFO, "write access will " |
4429 | "be enabled during recovery"); | |
ac27a0ec DK |
4430 | } |
4431 | } | |
4432 | ||
4433 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4434 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4435 | "and inode journals!"); | |
ac27a0ec DK |
4436 | return -EINVAL; |
4437 | } | |
4438 | ||
4439 | if (journal_inum) { | |
617ba13b | 4440 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4441 | return -EINVAL; |
4442 | } else { | |
617ba13b | 4443 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4444 | return -EINVAL; |
4445 | } | |
4446 | ||
90576c0b | 4447 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4448 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4449 | |
e2b911c5 | 4450 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4451 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4452 | if (!err) { |
4453 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4454 | if (save) | |
4455 | memcpy(save, ((char *) es) + | |
4456 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4457 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4458 | if (save) |
4459 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4460 | save, EXT4_S_ERR_LEN); | |
4461 | kfree(save); | |
4462 | } | |
ac27a0ec DK |
4463 | |
4464 | if (err) { | |
b31e1552 | 4465 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4466 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4467 | return err; |
4468 | } | |
4469 | ||
617ba13b MC |
4470 | EXT4_SB(sb)->s_journal = journal; |
4471 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4472 | |
c41303ce | 4473 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4474 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4475 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4476 | |
4477 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4478 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4479 | } |
4480 | ||
4481 | return 0; | |
4482 | } | |
4483 | ||
e2d67052 | 4484 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4485 | { |
e2d67052 | 4486 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4487 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4488 | int error = 0; |
ac27a0ec | 4489 | |
bdfe0cbd | 4490 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4491 | return error; |
71290b36 TT |
4492 | /* |
4493 | * If the file system is mounted read-only, don't update the | |
4494 | * superblock write time. This avoids updating the superblock | |
4495 | * write time when we are mounting the root file system | |
4496 | * read/only but we need to replay the journal; at that point, | |
4497 | * for people who are east of GMT and who make their clock | |
4498 | * tick in localtime for Windows bug-for-bug compatibility, | |
4499 | * the clock is set in the future, and this will cause e2fsck | |
4500 | * to complain and force a full file system check. | |
4501 | */ | |
4502 | if (!(sb->s_flags & MS_RDONLY)) | |
4503 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4504 | if (sb->s_bdev->bd_part) |
4505 | es->s_kbytes_written = | |
4506 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4507 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4508 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4509 | else |
4510 | es->s_kbytes_written = | |
4511 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4512 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4513 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4514 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4515 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4516 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4517 | es->s_free_inodes_count = | |
4518 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4519 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4520 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4521 | ext4_superblock_csum_set(sb); |
4743f839 PKS |
4522 | lock_buffer(sbh); |
4523 | if (buffer_write_io_error(sbh)) { | |
4524 | /* | |
4525 | * Oh, dear. A previous attempt to write the | |
4526 | * superblock failed. This could happen because the | |
4527 | * USB device was yanked out. Or it could happen to | |
4528 | * be a transient write error and maybe the block will | |
4529 | * be remapped. Nothing we can do but to retry the | |
4530 | * write and hope for the best. | |
4531 | */ | |
4532 | ext4_msg(sb, KERN_ERR, "previous I/O error to " | |
4533 | "superblock detected"); | |
4534 | clear_buffer_write_io_error(sbh); | |
4535 | set_buffer_uptodate(sbh); | |
4536 | } | |
ac27a0ec | 4537 | mark_buffer_dirty(sbh); |
4743f839 | 4538 | unlock_buffer(sbh); |
914258bf | 4539 | if (sync) { |
564bc402 DJ |
4540 | error = __sync_dirty_buffer(sbh, |
4541 | test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); | |
c4be0c1d TS |
4542 | if (error) |
4543 | return error; | |
4544 | ||
4545 | error = buffer_write_io_error(sbh); | |
4546 | if (error) { | |
b31e1552 ES |
4547 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4548 | "superblock"); | |
914258bf TT |
4549 | clear_buffer_write_io_error(sbh); |
4550 | set_buffer_uptodate(sbh); | |
4551 | } | |
4552 | } | |
c4be0c1d | 4553 | return error; |
ac27a0ec DK |
4554 | } |
4555 | ||
ac27a0ec DK |
4556 | /* |
4557 | * Have we just finished recovery? If so, and if we are mounting (or | |
4558 | * remounting) the filesystem readonly, then we will end up with a | |
4559 | * consistent fs on disk. Record that fact. | |
4560 | */ | |
2b2d6d01 TT |
4561 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4562 | struct ext4_super_block *es) | |
ac27a0ec | 4563 | { |
617ba13b | 4564 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4565 | |
e2b911c5 | 4566 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
4567 | BUG_ON(journal != NULL); |
4568 | return; | |
4569 | } | |
dab291af | 4570 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4571 | if (jbd2_journal_flush(journal) < 0) |
4572 | goto out; | |
4573 | ||
e2b911c5 | 4574 | if (ext4_has_feature_journal_needs_recovery(sb) && |
ac27a0ec | 4575 | sb->s_flags & MS_RDONLY) { |
e2b911c5 | 4576 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 4577 | ext4_commit_super(sb, 1); |
ac27a0ec | 4578 | } |
7ffe1ea8 HK |
4579 | |
4580 | out: | |
dab291af | 4581 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4582 | } |
4583 | ||
4584 | /* | |
4585 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4586 | * has recorded an error from a previous lifetime, move that error to the | |
4587 | * main filesystem now. | |
4588 | */ | |
2b2d6d01 TT |
4589 | static void ext4_clear_journal_err(struct super_block *sb, |
4590 | struct ext4_super_block *es) | |
ac27a0ec DK |
4591 | { |
4592 | journal_t *journal; | |
4593 | int j_errno; | |
4594 | const char *errstr; | |
4595 | ||
e2b911c5 | 4596 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4597 | |
617ba13b | 4598 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4599 | |
4600 | /* | |
4601 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4602 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4603 | */ |
4604 | ||
dab291af | 4605 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4606 | if (j_errno) { |
4607 | char nbuf[16]; | |
4608 | ||
617ba13b | 4609 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4610 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4611 | "from previous mount: %s", errstr); |
12062ddd | 4612 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4613 | |
617ba13b MC |
4614 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4615 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4616 | ext4_commit_super(sb, 1); |
ac27a0ec | 4617 | |
dab291af | 4618 | jbd2_journal_clear_err(journal); |
d796c52e | 4619 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4620 | } |
4621 | } | |
4622 | ||
4623 | /* | |
4624 | * Force the running and committing transactions to commit, | |
4625 | * and wait on the commit. | |
4626 | */ | |
617ba13b | 4627 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4628 | { |
4629 | journal_t *journal; | |
ac27a0ec DK |
4630 | |
4631 | if (sb->s_flags & MS_RDONLY) | |
4632 | return 0; | |
4633 | ||
617ba13b | 4634 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4635 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4636 | } |
4637 | ||
617ba13b | 4638 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4639 | { |
14ce0cb4 | 4640 | int ret = 0; |
9eddacf9 | 4641 | tid_t target; |
06a407f1 | 4642 | bool needs_barrier = false; |
8d5d02e6 | 4643 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4644 | |
9bffad1e | 4645 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4646 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4647 | /* |
4648 | * Writeback quota in non-journalled quota case - journalled quota has | |
4649 | * no dirty dquots | |
4650 | */ | |
4651 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4652 | /* |
4653 | * Data writeback is possible w/o journal transaction, so barrier must | |
4654 | * being sent at the end of the function. But we can skip it if | |
4655 | * transaction_commit will do it for us. | |
4656 | */ | |
bda32530 TT |
4657 | if (sbi->s_journal) { |
4658 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4659 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4660 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4661 | needs_barrier = true; | |
4662 | ||
4663 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4664 | if (wait) | |
4665 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4666 | target); | |
4667 | } | |
4668 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4669 | needs_barrier = true; |
06a407f1 DM |
4670 | if (needs_barrier) { |
4671 | int err; | |
4672 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4673 | if (!ret) | |
4674 | ret = err; | |
0390131b | 4675 | } |
06a407f1 DM |
4676 | |
4677 | return ret; | |
4678 | } | |
4679 | ||
ac27a0ec DK |
4680 | /* |
4681 | * LVM calls this function before a (read-only) snapshot is created. This | |
4682 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4683 | * |
4684 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4685 | * state independently. It relies on upper layer to stop all data & metadata |
4686 | * modifications. | |
ac27a0ec | 4687 | */ |
c4be0c1d | 4688 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4689 | { |
c4be0c1d TS |
4690 | int error = 0; |
4691 | journal_t *journal; | |
ac27a0ec | 4692 | |
9ca92389 TT |
4693 | if (sb->s_flags & MS_RDONLY) |
4694 | return 0; | |
ac27a0ec | 4695 | |
9ca92389 | 4696 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4697 | |
bb044576 TT |
4698 | if (journal) { |
4699 | /* Now we set up the journal barrier. */ | |
4700 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4701 | |
bb044576 TT |
4702 | /* |
4703 | * Don't clear the needs_recovery flag if we failed to | |
4704 | * flush the journal. | |
4705 | */ | |
4706 | error = jbd2_journal_flush(journal); | |
4707 | if (error < 0) | |
4708 | goto out; | |
c642dc9e ES |
4709 | |
4710 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 4711 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 4712 | } |
9ca92389 | 4713 | |
9ca92389 | 4714 | error = ext4_commit_super(sb, 1); |
6b0310fb | 4715 | out: |
bb044576 TT |
4716 | if (journal) |
4717 | /* we rely on upper layer to stop further updates */ | |
4718 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4719 | return error; |
ac27a0ec DK |
4720 | } |
4721 | ||
4722 | /* | |
4723 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4724 | * flag here, even though the filesystem is not technically dirty yet. | |
4725 | */ | |
c4be0c1d | 4726 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4727 | { |
9ca92389 TT |
4728 | if (sb->s_flags & MS_RDONLY) |
4729 | return 0; | |
4730 | ||
c642dc9e ES |
4731 | if (EXT4_SB(sb)->s_journal) { |
4732 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 4733 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
4734 | } |
4735 | ||
9ca92389 | 4736 | ext4_commit_super(sb, 1); |
c4be0c1d | 4737 | return 0; |
ac27a0ec DK |
4738 | } |
4739 | ||
673c6100 TT |
4740 | /* |
4741 | * Structure to save mount options for ext4_remount's benefit | |
4742 | */ | |
4743 | struct ext4_mount_options { | |
4744 | unsigned long s_mount_opt; | |
a2595b8a | 4745 | unsigned long s_mount_opt2; |
08cefc7a EB |
4746 | kuid_t s_resuid; |
4747 | kgid_t s_resgid; | |
673c6100 TT |
4748 | unsigned long s_commit_interval; |
4749 | u32 s_min_batch_time, s_max_batch_time; | |
4750 | #ifdef CONFIG_QUOTA | |
4751 | int s_jquota_fmt; | |
a2d4a646 | 4752 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4753 | #endif |
4754 | }; | |
4755 | ||
2b2d6d01 | 4756 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4757 | { |
2b2d6d01 | 4758 | struct ext4_super_block *es; |
617ba13b | 4759 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4760 | unsigned long old_sb_flags; |
617ba13b | 4761 | struct ext4_mount_options old_opts; |
c79d967d | 4762 | int enable_quota = 0; |
8a266467 | 4763 | ext4_group_t g; |
b3881f74 | 4764 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4765 | int err = 0; |
ac27a0ec | 4766 | #ifdef CONFIG_QUOTA |
03dafb5f | 4767 | int i, j; |
ac27a0ec | 4768 | #endif |
d4c402d9 | 4769 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4770 | |
4771 | /* Store the original options */ | |
4772 | old_sb_flags = sb->s_flags; | |
4773 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4774 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4775 | old_opts.s_resuid = sbi->s_resuid; |
4776 | old_opts.s_resgid = sbi->s_resgid; | |
4777 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4778 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4779 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4780 | #ifdef CONFIG_QUOTA |
4781 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 4782 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
4783 | if (sbi->s_qf_names[i]) { |
4784 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4785 | GFP_KERNEL); | |
4786 | if (!old_opts.s_qf_names[i]) { | |
4787 | for (j = 0; j < i; j++) | |
4788 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4789 | kfree(orig_data); |
03dafb5f CG |
4790 | return -ENOMEM; |
4791 | } | |
4792 | } else | |
4793 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4794 | #endif |
b3881f74 TT |
4795 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4796 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 4797 | |
661aa520 | 4798 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4799 | err = -EINVAL; |
4800 | goto restore_opts; | |
4801 | } | |
4802 | ||
6b992ff2 | 4803 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
4804 | test_opt(sb, JOURNAL_CHECKSUM)) { |
4805 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
4806 | "during remount not supported; ignoring"); |
4807 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
4808 | } |
4809 | ||
6ae6514b PS |
4810 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4811 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4812 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4813 | "both data=journal and delalloc"); | |
4814 | err = -EINVAL; | |
4815 | goto restore_opts; | |
4816 | } | |
4817 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4818 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4819 | "both data=journal and dioread_nolock"); | |
4820 | err = -EINVAL; | |
4821 | goto restore_opts; | |
4822 | } | |
923ae0ff RZ |
4823 | if (test_opt(sb, DAX)) { |
4824 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4825 | "both data=journal and dax"); | |
4826 | err = -EINVAL; | |
4827 | goto restore_opts; | |
4828 | } | |
4829 | } | |
4830 | ||
4831 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { | |
4832 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
4833 | "dax flag with busy inodes while remounting"); | |
4834 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
4835 | } |
4836 | ||
4ab2f15b | 4837 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4838 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4839 | |
4840 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4841 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4842 | |
4843 | es = sbi->s_es; | |
4844 | ||
b3881f74 | 4845 | if (sbi->s_journal) { |
0390131b | 4846 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4847 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4848 | } | |
ac27a0ec | 4849 | |
a2fd66d0 TT |
4850 | if (*flags & MS_LAZYTIME) |
4851 | sb->s_flags |= MS_LAZYTIME; | |
4852 | ||
661aa520 | 4853 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4854 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4855 | err = -EROFS; |
4856 | goto restore_opts; | |
4857 | } | |
4858 | ||
4859 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
4860 | err = sync_filesystem(sb); |
4861 | if (err < 0) | |
4862 | goto restore_opts; | |
0f0dd62f CH |
4863 | err = dquot_suspend(sb, -1); |
4864 | if (err < 0) | |
c79d967d | 4865 | goto restore_opts; |
c79d967d | 4866 | |
ac27a0ec DK |
4867 | /* |
4868 | * First of all, the unconditional stuff we have to do | |
4869 | * to disable replay of the journal when we next remount | |
4870 | */ | |
4871 | sb->s_flags |= MS_RDONLY; | |
4872 | ||
4873 | /* | |
4874 | * OK, test if we are remounting a valid rw partition | |
4875 | * readonly, and if so set the rdonly flag and then | |
4876 | * mark the partition as valid again. | |
4877 | */ | |
617ba13b MC |
4878 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4879 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4880 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4881 | ||
a63c9eb2 | 4882 | if (sbi->s_journal) |
0390131b | 4883 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4884 | } else { |
a13fb1a4 | 4885 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 4886 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 4887 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
4888 | err = -EROFS; |
4889 | goto restore_opts; | |
4890 | } | |
8a266467 TT |
4891 | /* |
4892 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4893 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4894 | */ |
4895 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4896 | struct ext4_group_desc *gdp = | |
4897 | ext4_get_group_desc(sb, g, NULL); | |
4898 | ||
feb0ab32 | 4899 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4900 | ext4_msg(sb, KERN_ERR, |
4901 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 4902 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 4903 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 4904 | err = -EFSBADCRC; |
8a266467 TT |
4905 | goto restore_opts; |
4906 | } | |
4907 | } | |
4908 | ||
ead6596b ES |
4909 | /* |
4910 | * If we have an unprocessed orphan list hanging | |
4911 | * around from a previously readonly bdev mount, | |
4912 | * require a full umount/remount for now. | |
4913 | */ | |
4914 | if (es->s_last_orphan) { | |
b31e1552 | 4915 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4916 | "remount RDWR because of unprocessed " |
4917 | "orphan inode list. Please " | |
b31e1552 | 4918 | "umount/remount instead"); |
ead6596b ES |
4919 | err = -EINVAL; |
4920 | goto restore_opts; | |
4921 | } | |
4922 | ||
ac27a0ec DK |
4923 | /* |
4924 | * Mounting a RDONLY partition read-write, so reread | |
4925 | * and store the current valid flag. (It may have | |
4926 | * been changed by e2fsck since we originally mounted | |
4927 | * the partition.) | |
4928 | */ | |
0390131b FM |
4929 | if (sbi->s_journal) |
4930 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4931 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4932 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4933 | sb->s_flags &= ~MS_RDONLY; |
e2b911c5 | 4934 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
4935 | if (ext4_multi_mount_protect(sb, |
4936 | le64_to_cpu(es->s_mmp_block))) { | |
4937 | err = -EROFS; | |
4938 | goto restore_opts; | |
4939 | } | |
c79d967d | 4940 | enable_quota = 1; |
ac27a0ec DK |
4941 | } |
4942 | } | |
bfff6873 LC |
4943 | |
4944 | /* | |
4945 | * Reinitialize lazy itable initialization thread based on | |
4946 | * current settings | |
4947 | */ | |
4948 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4949 | ext4_unregister_li_request(sb); | |
4950 | else { | |
4951 | ext4_group_t first_not_zeroed; | |
4952 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4953 | ext4_register_li_request(sb, first_not_zeroed); | |
4954 | } | |
4955 | ||
6fd058f7 | 4956 | ext4_setup_system_zone(sb); |
d096ad0f | 4957 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 4958 | ext4_commit_super(sb, 1); |
0390131b | 4959 | |
ac27a0ec DK |
4960 | #ifdef CONFIG_QUOTA |
4961 | /* Release old quota file names */ | |
a2d4a646 | 4962 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 4963 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
4964 | if (enable_quota) { |
4965 | if (sb_any_quota_suspended(sb)) | |
4966 | dquot_resume(sb, -1); | |
e2b911c5 | 4967 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 4968 | err = ext4_enable_quotas(sb); |
07724f98 | 4969 | if (err) |
7c319d32 | 4970 | goto restore_opts; |
7c319d32 AK |
4971 | } |
4972 | } | |
ac27a0ec | 4973 | #endif |
d4c402d9 | 4974 | |
a26f4992 | 4975 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
4976 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
4977 | kfree(orig_data); | |
ac27a0ec | 4978 | return 0; |
0b8e58a1 | 4979 | |
ac27a0ec DK |
4980 | restore_opts: |
4981 | sb->s_flags = old_sb_flags; | |
4982 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4983 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4984 | sbi->s_resuid = old_opts.s_resuid; |
4985 | sbi->s_resgid = old_opts.s_resgid; | |
4986 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4987 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4988 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4989 | #ifdef CONFIG_QUOTA |
4990 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 4991 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 4992 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
4993 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
4994 | } | |
4995 | #endif | |
d4c402d9 | 4996 | kfree(orig_data); |
ac27a0ec DK |
4997 | return err; |
4998 | } | |
4999 | ||
689c958c LX |
5000 | #ifdef CONFIG_QUOTA |
5001 | static int ext4_statfs_project(struct super_block *sb, | |
5002 | kprojid_t projid, struct kstatfs *buf) | |
5003 | { | |
5004 | struct kqid qid; | |
5005 | struct dquot *dquot; | |
5006 | u64 limit; | |
5007 | u64 curblock; | |
5008 | ||
5009 | qid = make_kqid_projid(projid); | |
5010 | dquot = dqget(sb, qid); | |
5011 | if (IS_ERR(dquot)) | |
5012 | return PTR_ERR(dquot); | |
5013 | spin_lock(&dq_data_lock); | |
5014 | ||
5015 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? | |
5016 | dquot->dq_dqb.dqb_bsoftlimit : | |
5017 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; | |
5018 | if (limit && buf->f_blocks > limit) { | |
5019 | curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; | |
5020 | buf->f_blocks = limit; | |
5021 | buf->f_bfree = buf->f_bavail = | |
5022 | (buf->f_blocks > curblock) ? | |
5023 | (buf->f_blocks - curblock) : 0; | |
5024 | } | |
5025 | ||
5026 | limit = dquot->dq_dqb.dqb_isoftlimit ? | |
5027 | dquot->dq_dqb.dqb_isoftlimit : | |
5028 | dquot->dq_dqb.dqb_ihardlimit; | |
5029 | if (limit && buf->f_files > limit) { | |
5030 | buf->f_files = limit; | |
5031 | buf->f_ffree = | |
5032 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
5033 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
5034 | } | |
5035 | ||
5036 | spin_unlock(&dq_data_lock); | |
5037 | dqput(dquot); | |
5038 | return 0; | |
5039 | } | |
5040 | #endif | |
5041 | ||
2b2d6d01 | 5042 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
5043 | { |
5044 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
5045 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
5046 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 5047 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 5048 | u64 fsid; |
d02a9391 | 5049 | s64 bfree; |
27dd4385 | 5050 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 5051 | |
952fc18e TT |
5052 | if (!test_opt(sb, MINIX_DF)) |
5053 | overhead = sbi->s_overhead; | |
ac27a0ec | 5054 | |
617ba13b | 5055 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 5056 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 5057 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
5058 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
5059 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 5060 | /* prevent underflow in case that few free space is available */ |
57042651 | 5061 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
5062 | buf->f_bavail = buf->f_bfree - |
5063 | (ext4_r_blocks_count(es) + resv_blocks); | |
5064 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
5065 | buf->f_bavail = 0; |
5066 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 5067 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 5068 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
5069 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
5070 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
5071 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
5072 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 5073 | |
689c958c LX |
5074 | #ifdef CONFIG_QUOTA |
5075 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
5076 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
5077 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
5078 | #endif | |
ac27a0ec DK |
5079 | return 0; |
5080 | } | |
5081 | ||
0b8e58a1 AD |
5082 | /* Helper function for writing quotas on sync - we need to start transaction |
5083 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 5084 | * Process 1 Process 2 |
617ba13b | 5085 | * ext4_create() quota_sync() |
a269eb18 | 5086 | * jbd2_journal_start() write_dquot() |
871a2931 | 5087 | * dquot_initialize() down(dqio_mutex) |
dab291af | 5088 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
5089 | * |
5090 | */ | |
5091 | ||
5092 | #ifdef CONFIG_QUOTA | |
5093 | ||
5094 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
5095 | { | |
4c376dca | 5096 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
5097 | } |
5098 | ||
617ba13b | 5099 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
5100 | { |
5101 | int ret, err; | |
5102 | handle_t *handle; | |
5103 | struct inode *inode; | |
5104 | ||
5105 | inode = dquot_to_inode(dquot); | |
9924a92a | 5106 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 5107 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5108 | if (IS_ERR(handle)) |
5109 | return PTR_ERR(handle); | |
5110 | ret = dquot_commit(dquot); | |
617ba13b | 5111 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5112 | if (!ret) |
5113 | ret = err; | |
5114 | return ret; | |
5115 | } | |
5116 | ||
617ba13b | 5117 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
5118 | { |
5119 | int ret, err; | |
5120 | handle_t *handle; | |
5121 | ||
9924a92a | 5122 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5123 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5124 | if (IS_ERR(handle)) |
5125 | return PTR_ERR(handle); | |
5126 | ret = dquot_acquire(dquot); | |
617ba13b | 5127 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5128 | if (!ret) |
5129 | ret = err; | |
5130 | return ret; | |
5131 | } | |
5132 | ||
617ba13b | 5133 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5134 | { |
5135 | int ret, err; | |
5136 | handle_t *handle; | |
5137 | ||
9924a92a | 5138 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5139 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5140 | if (IS_ERR(handle)) { |
5141 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5142 | dquot_release(dquot); | |
ac27a0ec | 5143 | return PTR_ERR(handle); |
9c3013e9 | 5144 | } |
ac27a0ec | 5145 | ret = dquot_release(dquot); |
617ba13b | 5146 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5147 | if (!ret) |
5148 | ret = err; | |
5149 | return ret; | |
5150 | } | |
5151 | ||
617ba13b | 5152 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5153 | { |
262b4662 JK |
5154 | struct super_block *sb = dquot->dq_sb; |
5155 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5156 | ||
2c8be6b2 | 5157 | /* Are we journaling quotas? */ |
e2b911c5 | 5158 | if (ext4_has_feature_quota(sb) || |
262b4662 | 5159 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 5160 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5161 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5162 | } else { |
5163 | return dquot_mark_dquot_dirty(dquot); | |
5164 | } | |
5165 | } | |
5166 | ||
617ba13b | 5167 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5168 | { |
5169 | int ret, err; | |
5170 | handle_t *handle; | |
5171 | ||
5172 | /* Data block + inode block */ | |
2b0143b5 | 5173 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5174 | if (IS_ERR(handle)) |
5175 | return PTR_ERR(handle); | |
5176 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5177 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5178 | if (!ret) |
5179 | ret = err; | |
5180 | return ret; | |
5181 | } | |
5182 | ||
5183 | /* | |
5184 | * Turn on quotas during mount time - we need to find | |
5185 | * the quota file and such... | |
5186 | */ | |
617ba13b | 5187 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5188 | { |
287a8095 CH |
5189 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5190 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5191 | } |
5192 | ||
daf647d2 TT |
5193 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
5194 | { | |
5195 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5196 | ||
5197 | /* The first argument of lockdep_set_subclass has to be | |
5198 | * *exactly* the same as the argument to init_rwsem() --- in | |
5199 | * this case, in init_once() --- or lockdep gets unhappy | |
5200 | * because the name of the lock is set using the | |
5201 | * stringification of the argument to init_rwsem(). | |
5202 | */ | |
5203 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ | |
5204 | lockdep_set_subclass(&ei->i_data_sem, subclass); | |
5205 | } | |
5206 | ||
ac27a0ec DK |
5207 | /* |
5208 | * Standard function to be called on quota_on | |
5209 | */ | |
617ba13b | 5210 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 5211 | struct path *path) |
ac27a0ec DK |
5212 | { |
5213 | int err; | |
ac27a0ec DK |
5214 | |
5215 | if (!test_opt(sb, QUOTA)) | |
5216 | return -EINVAL; | |
0623543b | 5217 | |
ac27a0ec | 5218 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5219 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5220 | return -EXDEV; |
0623543b JK |
5221 | /* Journaling quota? */ |
5222 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5223 | /* Quotafile not in fs root? */ |
f00c9e44 | 5224 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5225 | ext4_msg(sb, KERN_WARNING, |
5226 | "Quota file not on filesystem root. " | |
5227 | "Journaled quota will not work"); | |
2b2d6d01 | 5228 | } |
0623543b JK |
5229 | |
5230 | /* | |
5231 | * When we journal data on quota file, we have to flush journal to see | |
5232 | * all updates to the file when we bypass pagecache... | |
5233 | */ | |
0390131b | 5234 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5235 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5236 | /* |
5237 | * We don't need to lock updates but journal_flush() could | |
5238 | * otherwise be livelocked... | |
5239 | */ | |
5240 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5241 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5242 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5243 | if (err) |
7ffe1ea8 | 5244 | return err; |
0623543b | 5245 | } |
daf647d2 TT |
5246 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
5247 | err = dquot_quota_on(sb, type, format_id, path); | |
5248 | if (err) | |
5249 | lockdep_set_quota_inode(path->dentry->d_inode, | |
5250 | I_DATA_SEM_NORMAL); | |
5251 | return err; | |
ac27a0ec DK |
5252 | } |
5253 | ||
7c319d32 AK |
5254 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5255 | unsigned int flags) | |
5256 | { | |
5257 | int err; | |
5258 | struct inode *qf_inode; | |
a2d4a646 | 5259 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5260 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5261 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5262 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5263 | }; |
5264 | ||
e2b911c5 | 5265 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5266 | |
5267 | if (!qf_inums[type]) | |
5268 | return -EPERM; | |
5269 | ||
5270 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5271 | if (IS_ERR(qf_inode)) { | |
5272 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5273 | return PTR_ERR(qf_inode); | |
5274 | } | |
5275 | ||
bcb13850 JK |
5276 | /* Don't account quota for quota files to avoid recursion */ |
5277 | qf_inode->i_flags |= S_NOQUOTA; | |
daf647d2 | 5278 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
7c319d32 AK |
5279 | err = dquot_enable(qf_inode, type, format_id, flags); |
5280 | iput(qf_inode); | |
daf647d2 TT |
5281 | if (err) |
5282 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); | |
7c319d32 AK |
5283 | |
5284 | return err; | |
5285 | } | |
5286 | ||
5287 | /* Enable usage tracking for all quota types. */ | |
5288 | static int ext4_enable_quotas(struct super_block *sb) | |
5289 | { | |
5290 | int type, err = 0; | |
a2d4a646 | 5291 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5292 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5293 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5294 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 | 5295 | }; |
49da9392 JK |
5296 | bool quota_mopt[EXT4_MAXQUOTAS] = { |
5297 | test_opt(sb, USRQUOTA), | |
5298 | test_opt(sb, GRPQUOTA), | |
5299 | test_opt(sb, PRJQUOTA), | |
5300 | }; | |
7c319d32 AK |
5301 | |
5302 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5303 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5304 | if (qf_inums[type]) { |
5305 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
49da9392 JK |
5306 | DQUOT_USAGE_ENABLED | |
5307 | (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); | |
7c319d32 AK |
5308 | if (err) { |
5309 | ext4_warning(sb, | |
72ba7450 TT |
5310 | "Failed to enable quota tracking " |
5311 | "(type=%d, err=%d). Please run " | |
5312 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5313 | return err; |
5314 | } | |
5315 | } | |
5316 | } | |
5317 | return 0; | |
5318 | } | |
5319 | ||
ca0e05e4 DM |
5320 | static int ext4_quota_off(struct super_block *sb, int type) |
5321 | { | |
21f97697 JK |
5322 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5323 | handle_t *handle; | |
5324 | ||
87009d86 DM |
5325 | /* Force all delayed allocation blocks to be allocated. |
5326 | * Caller already holds s_umount sem */ | |
5327 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5328 | sync_filesystem(sb); |
ca0e05e4 | 5329 | |
0b268590 AG |
5330 | if (!inode) |
5331 | goto out; | |
5332 | ||
21f97697 JK |
5333 | /* Update modification times of quota files when userspace can |
5334 | * start looking at them */ | |
9924a92a | 5335 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5336 | if (IS_ERR(handle)) |
5337 | goto out; | |
5338 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5339 | ext4_mark_inode_dirty(handle, inode); | |
5340 | ext4_journal_stop(handle); | |
5341 | ||
5342 | out: | |
ca0e05e4 DM |
5343 | return dquot_quota_off(sb, type); |
5344 | } | |
5345 | ||
ac27a0ec DK |
5346 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5347 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5348 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5349 | * we don't have to be afraid of races */ |
617ba13b | 5350 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5351 | size_t len, loff_t off) |
5352 | { | |
5353 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5354 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5355 | int offset = off & (sb->s_blocksize - 1); |
5356 | int tocopy; | |
5357 | size_t toread; | |
5358 | struct buffer_head *bh; | |
5359 | loff_t i_size = i_size_read(inode); | |
5360 | ||
5361 | if (off > i_size) | |
5362 | return 0; | |
5363 | if (off+len > i_size) | |
5364 | len = i_size-off; | |
5365 | toread = len; | |
5366 | while (toread > 0) { | |
5367 | tocopy = sb->s_blocksize - offset < toread ? | |
5368 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5369 | bh = ext4_bread(NULL, inode, blk, 0); |
5370 | if (IS_ERR(bh)) | |
5371 | return PTR_ERR(bh); | |
ac27a0ec DK |
5372 | if (!bh) /* A hole? */ |
5373 | memset(data, 0, tocopy); | |
5374 | else | |
5375 | memcpy(data, bh->b_data+offset, tocopy); | |
5376 | brelse(bh); | |
5377 | offset = 0; | |
5378 | toread -= tocopy; | |
5379 | data += tocopy; | |
5380 | blk++; | |
5381 | } | |
5382 | return len; | |
5383 | } | |
5384 | ||
5385 | /* Write to quotafile (we know the transaction is already started and has | |
5386 | * enough credits) */ | |
617ba13b | 5387 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5388 | const char *data, size_t len, loff_t off) |
5389 | { | |
5390 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5391 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5392 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5393 | int retries = 0; |
ac27a0ec DK |
5394 | struct buffer_head *bh; |
5395 | handle_t *handle = journal_current_handle(); | |
5396 | ||
0390131b | 5397 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5398 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5399 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5400 | (unsigned long long)off, (unsigned long long)len); |
5401 | return -EIO; | |
5402 | } | |
67eeb568 DM |
5403 | /* |
5404 | * Since we account only one data block in transaction credits, | |
5405 | * then it is impossible to cross a block boundary. | |
5406 | */ | |
5407 | if (sb->s_blocksize - offset < len) { | |
5408 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5409 | " cancelled because not block aligned", | |
5410 | (unsigned long long)off, (unsigned long long)len); | |
5411 | return -EIO; | |
5412 | } | |
5413 | ||
c5e298ae TT |
5414 | do { |
5415 | bh = ext4_bread(handle, inode, blk, | |
5416 | EXT4_GET_BLOCKS_CREATE | | |
5417 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5418 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5419 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5420 | if (IS_ERR(bh)) |
5421 | return PTR_ERR(bh); | |
67eeb568 DM |
5422 | if (!bh) |
5423 | goto out; | |
5d601255 | 5424 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5425 | err = ext4_journal_get_write_access(handle, bh); |
5426 | if (err) { | |
5427 | brelse(bh); | |
1c215028 | 5428 | return err; |
ac27a0ec | 5429 | } |
67eeb568 DM |
5430 | lock_buffer(bh); |
5431 | memcpy(bh->b_data+offset, data, len); | |
5432 | flush_dcache_page(bh->b_page); | |
5433 | unlock_buffer(bh); | |
62d2b5f2 | 5434 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5435 | brelse(bh); |
ac27a0ec | 5436 | out: |
67eeb568 DM |
5437 | if (inode->i_size < off + len) { |
5438 | i_size_write(inode, off + len); | |
617ba13b | 5439 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5440 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5441 | } |
67eeb568 | 5442 | return len; |
ac27a0ec DK |
5443 | } |
5444 | ||
8f0e8746 TT |
5445 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) |
5446 | { | |
5447 | const struct quota_format_ops *ops; | |
5448 | ||
5449 | if (!sb_has_quota_loaded(sb, qid->type)) | |
5450 | return -ESRCH; | |
5451 | ops = sb_dqopt(sb)->ops[qid->type]; | |
5452 | if (!ops || !ops->get_next_id) | |
5453 | return -ENOSYS; | |
5454 | return dquot_get_next_id(sb, qid); | |
5455 | } | |
ac27a0ec DK |
5456 | #endif |
5457 | ||
152a0836 AV |
5458 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5459 | const char *dev_name, void *data) | |
ac27a0ec | 5460 | { |
152a0836 | 5461 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5462 | } |
5463 | ||
c290ea01 | 5464 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
5465 | static inline void register_as_ext2(void) |
5466 | { | |
5467 | int err = register_filesystem(&ext2_fs_type); | |
5468 | if (err) | |
5469 | printk(KERN_WARNING | |
5470 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5471 | } | |
5472 | ||
5473 | static inline void unregister_as_ext2(void) | |
5474 | { | |
5475 | unregister_filesystem(&ext2_fs_type); | |
5476 | } | |
2035e776 TT |
5477 | |
5478 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5479 | { | |
e2b911c5 | 5480 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 TT |
5481 | return 0; |
5482 | if (sb->s_flags & MS_RDONLY) | |
5483 | return 1; | |
e2b911c5 | 5484 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
5485 | return 0; |
5486 | return 1; | |
5487 | } | |
24b58424 TT |
5488 | #else |
5489 | static inline void register_as_ext2(void) { } | |
5490 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5491 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5492 | #endif |
5493 | ||
24b58424 TT |
5494 | static inline void register_as_ext3(void) |
5495 | { | |
5496 | int err = register_filesystem(&ext3_fs_type); | |
5497 | if (err) | |
5498 | printk(KERN_WARNING | |
5499 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5500 | } | |
5501 | ||
5502 | static inline void unregister_as_ext3(void) | |
5503 | { | |
5504 | unregister_filesystem(&ext3_fs_type); | |
5505 | } | |
2035e776 TT |
5506 | |
5507 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5508 | { | |
e2b911c5 | 5509 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 5510 | return 0; |
e2b911c5 | 5511 | if (!ext4_has_feature_journal(sb)) |
2035e776 TT |
5512 | return 0; |
5513 | if (sb->s_flags & MS_RDONLY) | |
5514 | return 1; | |
e2b911c5 | 5515 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
5516 | return 0; |
5517 | return 1; | |
5518 | } | |
24b58424 | 5519 | |
03010a33 TT |
5520 | static struct file_system_type ext4_fs_type = { |
5521 | .owner = THIS_MODULE, | |
5522 | .name = "ext4", | |
152a0836 | 5523 | .mount = ext4_mount, |
03010a33 TT |
5524 | .kill_sb = kill_block_super, |
5525 | .fs_flags = FS_REQUIRES_DEV, | |
5526 | }; | |
7f78e035 | 5527 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5528 | |
e9e3bcec ES |
5529 | /* Shared across all ext4 file systems */ |
5530 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
e9e3bcec | 5531 | |
5dabfc78 | 5532 | static int __init ext4_init_fs(void) |
ac27a0ec | 5533 | { |
e9e3bcec | 5534 | int i, err; |
c9de560d | 5535 | |
e294a537 | 5536 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
5537 | ext4_li_info = NULL; |
5538 | mutex_init(&ext4_li_mtx); | |
5539 | ||
9a4c8019 | 5540 | /* Build-time check for flags consistency */ |
12e9b892 | 5541 | ext4_check_flag_values(); |
e9e3bcec | 5542 | |
e142d052 | 5543 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
e9e3bcec | 5544 | init_waitqueue_head(&ext4__ioend_wq[i]); |
e9e3bcec | 5545 | |
51865fda | 5546 | err = ext4_init_es(); |
6fd058f7 TT |
5547 | if (err) |
5548 | return err; | |
51865fda ZL |
5549 | |
5550 | err = ext4_init_pageio(); | |
5551 | if (err) | |
b5799018 | 5552 | goto out5; |
51865fda | 5553 | |
5dabfc78 | 5554 | err = ext4_init_system_zone(); |
bd2d0210 | 5555 | if (err) |
b5799018 | 5556 | goto out4; |
857ac889 | 5557 | |
b5799018 | 5558 | err = ext4_init_sysfs(); |
dd68314c | 5559 | if (err) |
b5799018 | 5560 | goto out3; |
857ac889 | 5561 | |
5dabfc78 | 5562 | err = ext4_init_mballoc(); |
c9de560d AT |
5563 | if (err) |
5564 | goto out2; | |
ac27a0ec DK |
5565 | err = init_inodecache(); |
5566 | if (err) | |
5567 | goto out1; | |
24b58424 | 5568 | register_as_ext3(); |
2035e776 | 5569 | register_as_ext2(); |
03010a33 | 5570 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5571 | if (err) |
5572 | goto out; | |
bfff6873 | 5573 | |
ac27a0ec DK |
5574 | return 0; |
5575 | out: | |
24b58424 TT |
5576 | unregister_as_ext2(); |
5577 | unregister_as_ext3(); | |
ac27a0ec DK |
5578 | destroy_inodecache(); |
5579 | out1: | |
5dabfc78 | 5580 | ext4_exit_mballoc(); |
9c191f70 | 5581 | out2: |
b5799018 TT |
5582 | ext4_exit_sysfs(); |
5583 | out3: | |
5dabfc78 | 5584 | ext4_exit_system_zone(); |
b5799018 | 5585 | out4: |
5dabfc78 | 5586 | ext4_exit_pageio(); |
b5799018 | 5587 | out5: |
51865fda ZL |
5588 | ext4_exit_es(); |
5589 | ||
ac27a0ec DK |
5590 | return err; |
5591 | } | |
5592 | ||
5dabfc78 | 5593 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5594 | { |
bfff6873 | 5595 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5596 | unregister_as_ext2(); |
5597 | unregister_as_ext3(); | |
03010a33 | 5598 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5599 | destroy_inodecache(); |
5dabfc78 | 5600 | ext4_exit_mballoc(); |
b5799018 | 5601 | ext4_exit_sysfs(); |
5dabfc78 TT |
5602 | ext4_exit_system_zone(); |
5603 | ext4_exit_pageio(); | |
dd12ed14 | 5604 | ext4_exit_es(); |
ac27a0ec DK |
5605 | } |
5606 | ||
5607 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5608 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5609 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5610 | module_init(ext4_init_fs) |
5611 | module_exit(ext4_exit_fs) |