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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
ac27a0ec DK |
24 | #include <linux/slab.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/blkdev.h> | |
66114cad | 27 | #include <linux/backing-dev.h> |
ac27a0ec | 28 | #include <linux/parser.h> |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
3197ebdb | 37 | #include <linux/ctype.h> |
1330593e | 38 | #include <linux/log2.h> |
717d50e4 | 39 | #include <linux/crc16.h> |
ef510424 | 40 | #include <linux/dax.h> |
7abc52c2 | 41 | #include <linux/cleancache.h> |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
afdbd4a6 | 43 | #include <linux/user_namespace.h> |
ac27a0ec | 44 | |
bfff6873 LC |
45 | #include <linux/kthread.h> |
46 | #include <linux/freezer.h> | |
47 | ||
3dcf5451 | 48 | #include "ext4.h" |
4a092d73 | 49 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 50 | #include "ext4_jbd2.h" |
ac27a0ec DK |
51 | #include "xattr.h" |
52 | #include "acl.h" | |
3661d286 | 53 | #include "mballoc.h" |
0c9ec4be | 54 | #include "fsmap.h" |
ac27a0ec | 55 | |
9bffad1e TT |
56 | #define CREATE_TRACE_POINTS |
57 | #include <trace/events/ext4.h> | |
58 | ||
0b75a840 LC |
59 | static struct ext4_lazy_init *ext4_li_info; |
60 | static struct mutex ext4_li_mtx; | |
e294a537 | 61 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
9f6200bb | 62 | |
617ba13b | 63 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 64 | unsigned long journal_devnum); |
2adf6da8 | 65 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
e2d67052 | 66 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
67 | static void ext4_mark_recovery_complete(struct super_block *sb, |
68 | struct ext4_super_block *es); | |
69 | static void ext4_clear_journal_err(struct super_block *sb, | |
70 | struct ext4_super_block *es); | |
617ba13b | 71 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 TT |
72 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
73 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 74 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 75 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
76 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
77 | const char *dev_name, void *data); | |
2035e776 TT |
78 | static inline int ext2_feature_set_ok(struct super_block *sb); |
79 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 80 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
81 | static void ext4_destroy_lazyinit_thread(void); |
82 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 83 | static void ext4_clear_request_list(void); |
c6cb7e77 EW |
84 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
85 | unsigned int journal_inum); | |
ac27a0ec | 86 | |
e74031fd JK |
87 | /* |
88 | * Lock ordering | |
89 | * | |
90 | * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and | |
91 | * i_mmap_rwsem (inode->i_mmap_rwsem)! | |
92 | * | |
93 | * page fault path: | |
94 | * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> | |
95 | * page lock -> i_data_sem (rw) | |
96 | * | |
97 | * buffered write path: | |
98 | * sb_start_write -> i_mutex -> mmap_sem | |
99 | * sb_start_write -> i_mutex -> transaction start -> page lock -> | |
100 | * i_data_sem (rw) | |
101 | * | |
102 | * truncate: | |
103 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
104 | * i_mmap_rwsem (w) -> page lock | |
105 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> | |
106 | * transaction start -> i_data_sem (rw) | |
107 | * | |
108 | * direct IO: | |
109 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem | |
110 | * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> | |
111 | * transaction start -> i_data_sem (rw) | |
112 | * | |
113 | * writepages: | |
114 | * transaction start -> page lock(s) -> i_data_sem (rw) | |
115 | */ | |
116 | ||
40bd02a3 SF |
117 | static bool userns_mounts = false; |
118 | module_param(userns_mounts, bool, 0644); | |
119 | MODULE_PARM_DESC(userns_mounts, "Allow mounts from unprivileged user namespaces"); | |
120 | ||
c290ea01 | 121 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
2035e776 TT |
122 | static struct file_system_type ext2_fs_type = { |
123 | .owner = THIS_MODULE, | |
124 | .name = "ext2", | |
125 | .mount = ext4_mount, | |
126 | .kill_sb = kill_block_super, | |
afdbd4a6 | 127 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
2035e776 | 128 | }; |
7f78e035 | 129 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 130 | MODULE_ALIAS("ext2"); |
2035e776 TT |
131 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
132 | #else | |
133 | #define IS_EXT2_SB(sb) (0) | |
134 | #endif | |
135 | ||
136 | ||
ba69f9ab JK |
137 | static struct file_system_type ext3_fs_type = { |
138 | .owner = THIS_MODULE, | |
139 | .name = "ext3", | |
152a0836 | 140 | .mount = ext4_mount, |
ba69f9ab | 141 | .kill_sb = kill_block_super, |
afdbd4a6 | 142 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
ba69f9ab | 143 | }; |
7f78e035 | 144 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 145 | MODULE_ALIAS("ext3"); |
ba69f9ab | 146 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
bd81d8ee | 147 | |
d25425f8 DW |
148 | static int ext4_verify_csum_type(struct super_block *sb, |
149 | struct ext4_super_block *es) | |
150 | { | |
e2b911c5 | 151 | if (!ext4_has_feature_metadata_csum(sb)) |
d25425f8 DW |
152 | return 1; |
153 | ||
154 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
155 | } | |
156 | ||
a9c47317 DW |
157 | static __le32 ext4_superblock_csum(struct super_block *sb, |
158 | struct ext4_super_block *es) | |
159 | { | |
160 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
161 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
162 | __u32 csum; | |
163 | ||
164 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
165 | ||
166 | return cpu_to_le32(csum); | |
167 | } | |
168 | ||
c197855e SH |
169 | static int ext4_superblock_csum_verify(struct super_block *sb, |
170 | struct ext4_super_block *es) | |
a9c47317 | 171 | { |
9aa5d32b | 172 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
173 | return 1; |
174 | ||
175 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
176 | } | |
177 | ||
06db49e6 | 178 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 179 | { |
06db49e6 TT |
180 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
181 | ||
9aa5d32b | 182 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
183 | return; |
184 | ||
185 | es->s_checksum = ext4_superblock_csum(sb, es); | |
186 | } | |
187 | ||
9933fc0a TT |
188 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
189 | { | |
190 | void *ret; | |
191 | ||
8be04b93 | 192 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
193 | if (!ret) |
194 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
195 | return ret; | |
196 | } | |
197 | ||
198 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
199 | { | |
200 | void *ret; | |
201 | ||
8be04b93 | 202 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
203 | if (!ret) |
204 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
205 | return ret; | |
206 | } | |
207 | ||
8fadc143 AR |
208 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
209 | struct ext4_group_desc *bg) | |
bd81d8ee | 210 | { |
3a14589c | 211 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 212 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 213 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
214 | } |
215 | ||
8fadc143 AR |
216 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
217 | struct ext4_group_desc *bg) | |
bd81d8ee | 218 | { |
5272f837 | 219 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 220 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 221 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
222 | } |
223 | ||
8fadc143 AR |
224 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
225 | struct ext4_group_desc *bg) | |
bd81d8ee | 226 | { |
5272f837 | 227 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 228 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 229 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
230 | } |
231 | ||
021b65bb TT |
232 | __u32 ext4_free_group_clusters(struct super_block *sb, |
233 | struct ext4_group_desc *bg) | |
560671a0 AK |
234 | { |
235 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
236 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 237 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
238 | } |
239 | ||
240 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
241 | struct ext4_group_desc *bg) | |
242 | { | |
243 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
244 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 245 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
246 | } |
247 | ||
248 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
249 | struct ext4_group_desc *bg) | |
250 | { | |
251 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
252 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 253 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
254 | } |
255 | ||
256 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
257 | struct ext4_group_desc *bg) | |
258 | { | |
259 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
260 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 261 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
262 | } |
263 | ||
8fadc143 AR |
264 | void ext4_block_bitmap_set(struct super_block *sb, |
265 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 266 | { |
3a14589c | 267 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
268 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
269 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
270 | } |
271 | ||
8fadc143 AR |
272 | void ext4_inode_bitmap_set(struct super_block *sb, |
273 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 274 | { |
5272f837 | 275 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
276 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
277 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
278 | } |
279 | ||
8fadc143 AR |
280 | void ext4_inode_table_set(struct super_block *sb, |
281 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 282 | { |
5272f837 | 283 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
284 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
285 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
286 | } |
287 | ||
021b65bb TT |
288 | void ext4_free_group_clusters_set(struct super_block *sb, |
289 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
290 | { |
291 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
292 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
293 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
294 | } | |
295 | ||
296 | void ext4_free_inodes_set(struct super_block *sb, | |
297 | struct ext4_group_desc *bg, __u32 count) | |
298 | { | |
299 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
300 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
301 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
302 | } | |
303 | ||
304 | void ext4_used_dirs_set(struct super_block *sb, | |
305 | struct ext4_group_desc *bg, __u32 count) | |
306 | { | |
307 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
308 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
309 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
310 | } | |
311 | ||
312 | void ext4_itable_unused_set(struct super_block *sb, | |
313 | struct ext4_group_desc *bg, __u32 count) | |
314 | { | |
315 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
316 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
317 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
318 | } | |
319 | ||
d3d1faf6 | 320 | |
1c13d5c0 TT |
321 | static void __save_error_info(struct super_block *sb, const char *func, |
322 | unsigned int line) | |
323 | { | |
324 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
325 | ||
326 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
1b46617b TT |
327 | if (bdev_read_only(sb->s_bdev)) |
328 | return; | |
1c13d5c0 TT |
329 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); |
330 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
331 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
332 | es->s_last_error_line = cpu_to_le32(line); | |
333 | if (!es->s_first_error_time) { | |
334 | es->s_first_error_time = es->s_last_error_time; | |
335 | strncpy(es->s_first_error_func, func, | |
336 | sizeof(es->s_first_error_func)); | |
337 | es->s_first_error_line = cpu_to_le32(line); | |
338 | es->s_first_error_ino = es->s_last_error_ino; | |
339 | es->s_first_error_block = es->s_last_error_block; | |
340 | } | |
66e61a9e TT |
341 | /* |
342 | * Start the daily error reporting function if it hasn't been | |
343 | * started already | |
344 | */ | |
345 | if (!es->s_error_count) | |
346 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 347 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
348 | } |
349 | ||
350 | static void save_error_info(struct super_block *sb, const char *func, | |
351 | unsigned int line) | |
352 | { | |
353 | __save_error_info(sb, func, line); | |
354 | ext4_commit_super(sb, 1); | |
355 | } | |
356 | ||
bdfe0cbd TT |
357 | /* |
358 | * The del_gendisk() function uninitializes the disk-specific data | |
359 | * structures, including the bdi structure, without telling anyone | |
360 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
361 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
362 | * This is a kludge to prevent these oops until we can put in a proper | |
363 | * hook in del_gendisk() to inform the VFS and file system layers. | |
364 | */ | |
365 | static int block_device_ejected(struct super_block *sb) | |
366 | { | |
367 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
368 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); | |
369 | ||
370 | return bdi->dev == NULL; | |
371 | } | |
372 | ||
18aadd47 BJ |
373 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
374 | { | |
375 | struct super_block *sb = journal->j_private; | |
376 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
377 | int error = is_journal_aborted(journal); | |
5d3ee208 | 378 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 379 | |
5d3ee208 | 380 | BUG_ON(txn->t_state == T_FINISHED); |
a0154344 DJ |
381 | |
382 | ext4_process_freed_data(sb, txn->t_tid); | |
383 | ||
18aadd47 | 384 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
385 | while (!list_empty(&txn->t_private_list)) { |
386 | jce = list_entry(txn->t_private_list.next, | |
387 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
388 | list_del_init(&jce->jce_list); |
389 | spin_unlock(&sbi->s_md_lock); | |
390 | jce->jce_func(sb, jce, error); | |
391 | spin_lock(&sbi->s_md_lock); | |
392 | } | |
393 | spin_unlock(&sbi->s_md_lock); | |
394 | } | |
1c13d5c0 | 395 | |
ac27a0ec DK |
396 | /* Deal with the reporting of failure conditions on a filesystem such as |
397 | * inconsistencies detected or read IO failures. | |
398 | * | |
399 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 400 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
401 | * write ordering constraints on the superblock which prevent us from |
402 | * writing it out straight away; and given that the journal is about to | |
403 | * be aborted, we can't rely on the current, or future, transactions to | |
404 | * write out the superblock safely. | |
405 | * | |
dab291af | 406 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 407 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
408 | * that error until we've noted it down and cleared it. |
409 | */ | |
410 | ||
617ba13b | 411 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 412 | { |
ac27a0ec DK |
413 | if (sb->s_flags & MS_RDONLY) |
414 | return; | |
415 | ||
2b2d6d01 | 416 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 417 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 418 | |
4ab2f15b | 419 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 420 | if (journal) |
dab291af | 421 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 422 | } |
2b2d6d01 | 423 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 424 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
425 | /* |
426 | * Make sure updated value of ->s_mount_flags will be visible | |
427 | * before ->s_flags update | |
428 | */ | |
429 | smp_wmb(); | |
ac27a0ec DK |
430 | sb->s_flags |= MS_RDONLY; |
431 | } | |
4327ba52 DJ |
432 | if (test_opt(sb, ERRORS_PANIC)) { |
433 | if (EXT4_SB(sb)->s_journal && | |
434 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
435 | return; | |
617ba13b | 436 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec | 437 | sb->s_id); |
4327ba52 | 438 | } |
ac27a0ec DK |
439 | } |
440 | ||
efbed4dc TT |
441 | #define ext4_error_ratelimit(sb) \ |
442 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
443 | "EXT4-fs error") | |
444 | ||
12062ddd | 445 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 446 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 447 | { |
0ff2ea7d | 448 | struct va_format vaf; |
ac27a0ec DK |
449 | va_list args; |
450 | ||
0db1ff22 TT |
451 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
452 | return; | |
453 | ||
efbed4dc TT |
454 | if (ext4_error_ratelimit(sb)) { |
455 | va_start(args, fmt); | |
456 | vaf.fmt = fmt; | |
457 | vaf.va = &args; | |
458 | printk(KERN_CRIT | |
459 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
460 | sb->s_id, function, line, current->comm, &vaf); | |
461 | va_end(args); | |
462 | } | |
f3fc0210 | 463 | save_error_info(sb, function, line); |
617ba13b | 464 | ext4_handle_error(sb); |
ac27a0ec DK |
465 | } |
466 | ||
e7c96e8e JP |
467 | void __ext4_error_inode(struct inode *inode, const char *function, |
468 | unsigned int line, ext4_fsblk_t block, | |
469 | const char *fmt, ...) | |
273df556 FM |
470 | { |
471 | va_list args; | |
f7c21177 | 472 | struct va_format vaf; |
1c13d5c0 | 473 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 474 | |
0db1ff22 TT |
475 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
476 | return; | |
477 | ||
1c13d5c0 TT |
478 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
479 | es->s_last_error_block = cpu_to_le64(block); | |
efbed4dc TT |
480 | if (ext4_error_ratelimit(inode->i_sb)) { |
481 | va_start(args, fmt); | |
482 | vaf.fmt = fmt; | |
483 | vaf.va = &args; | |
484 | if (block) | |
485 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
486 | "inode #%lu: block %llu: comm %s: %pV\n", | |
487 | inode->i_sb->s_id, function, line, inode->i_ino, | |
488 | block, current->comm, &vaf); | |
489 | else | |
490 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
491 | "inode #%lu: comm %s: %pV\n", | |
492 | inode->i_sb->s_id, function, line, inode->i_ino, | |
493 | current->comm, &vaf); | |
494 | va_end(args); | |
495 | } | |
1c13d5c0 | 496 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
497 | ext4_handle_error(inode->i_sb); |
498 | } | |
499 | ||
e7c96e8e JP |
500 | void __ext4_error_file(struct file *file, const char *function, |
501 | unsigned int line, ext4_fsblk_t block, | |
502 | const char *fmt, ...) | |
273df556 FM |
503 | { |
504 | va_list args; | |
f7c21177 | 505 | struct va_format vaf; |
1c13d5c0 | 506 | struct ext4_super_block *es; |
496ad9aa | 507 | struct inode *inode = file_inode(file); |
273df556 FM |
508 | char pathname[80], *path; |
509 | ||
0db1ff22 TT |
510 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
511 | return; | |
512 | ||
1c13d5c0 TT |
513 | es = EXT4_SB(inode->i_sb)->s_es; |
514 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
efbed4dc | 515 | if (ext4_error_ratelimit(inode->i_sb)) { |
9bf39ab2 | 516 | path = file_path(file, pathname, sizeof(pathname)); |
efbed4dc TT |
517 | if (IS_ERR(path)) |
518 | path = "(unknown)"; | |
519 | va_start(args, fmt); | |
520 | vaf.fmt = fmt; | |
521 | vaf.va = &args; | |
522 | if (block) | |
523 | printk(KERN_CRIT | |
524 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
525 | "block %llu: comm %s: path %s: %pV\n", | |
526 | inode->i_sb->s_id, function, line, inode->i_ino, | |
527 | block, current->comm, path, &vaf); | |
528 | else | |
529 | printk(KERN_CRIT | |
530 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
531 | "comm %s: path %s: %pV\n", | |
532 | inode->i_sb->s_id, function, line, inode->i_ino, | |
533 | current->comm, path, &vaf); | |
534 | va_end(args); | |
535 | } | |
1c13d5c0 | 536 | save_error_info(inode->i_sb, function, line); |
273df556 FM |
537 | ext4_handle_error(inode->i_sb); |
538 | } | |
539 | ||
722887dd TT |
540 | const char *ext4_decode_error(struct super_block *sb, int errno, |
541 | char nbuf[16]) | |
ac27a0ec DK |
542 | { |
543 | char *errstr = NULL; | |
544 | ||
545 | switch (errno) { | |
6a797d27 DW |
546 | case -EFSCORRUPTED: |
547 | errstr = "Corrupt filesystem"; | |
548 | break; | |
549 | case -EFSBADCRC: | |
550 | errstr = "Filesystem failed CRC"; | |
551 | break; | |
ac27a0ec DK |
552 | case -EIO: |
553 | errstr = "IO failure"; | |
554 | break; | |
555 | case -ENOMEM: | |
556 | errstr = "Out of memory"; | |
557 | break; | |
558 | case -EROFS: | |
78f1ddbb TT |
559 | if (!sb || (EXT4_SB(sb)->s_journal && |
560 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
561 | errstr = "Journal has aborted"; |
562 | else | |
563 | errstr = "Readonly filesystem"; | |
564 | break; | |
565 | default: | |
566 | /* If the caller passed in an extra buffer for unknown | |
567 | * errors, textualise them now. Else we just return | |
568 | * NULL. */ | |
569 | if (nbuf) { | |
570 | /* Check for truncated error codes... */ | |
571 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
572 | errstr = nbuf; | |
573 | } | |
574 | break; | |
575 | } | |
576 | ||
577 | return errstr; | |
578 | } | |
579 | ||
617ba13b | 580 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
581 | * automatically and invokes the appropriate error response. */ |
582 | ||
c398eda0 TT |
583 | void __ext4_std_error(struct super_block *sb, const char *function, |
584 | unsigned int line, int errno) | |
ac27a0ec DK |
585 | { |
586 | char nbuf[16]; | |
587 | const char *errstr; | |
588 | ||
0db1ff22 TT |
589 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
590 | return; | |
591 | ||
ac27a0ec DK |
592 | /* Special case: if the error is EROFS, and we're not already |
593 | * inside a transaction, then there's really no point in logging | |
594 | * an error. */ | |
595 | if (errno == -EROFS && journal_current_handle() == NULL && | |
596 | (sb->s_flags & MS_RDONLY)) | |
597 | return; | |
598 | ||
efbed4dc TT |
599 | if (ext4_error_ratelimit(sb)) { |
600 | errstr = ext4_decode_error(sb, errno, nbuf); | |
601 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
602 | sb->s_id, function, line, errstr); | |
603 | } | |
ac27a0ec | 604 | |
efbed4dc | 605 | save_error_info(sb, function, line); |
617ba13b | 606 | ext4_handle_error(sb); |
ac27a0ec DK |
607 | } |
608 | ||
609 | /* | |
617ba13b | 610 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
611 | * abort function may be used to deal with unrecoverable failures such |
612 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
613 | * | |
614 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
615 | * unless the error response on the fs has been set to panic in which | |
616 | * case we take the easy way out and panic immediately. | |
617 | */ | |
618 | ||
c67d859e | 619 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 620 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 621 | { |
651e1c3b | 622 | struct va_format vaf; |
ac27a0ec DK |
623 | va_list args; |
624 | ||
0db1ff22 TT |
625 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
626 | return; | |
627 | ||
1c13d5c0 | 628 | save_error_info(sb, function, line); |
ac27a0ec | 629 | va_start(args, fmt); |
651e1c3b JP |
630 | vaf.fmt = fmt; |
631 | vaf.va = &args; | |
632 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", | |
633 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
634 | va_end(args); |
635 | ||
1c13d5c0 TT |
636 | if ((sb->s_flags & MS_RDONLY) == 0) { |
637 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 638 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
639 | /* |
640 | * Make sure updated value of ->s_mount_flags will be visible | |
641 | * before ->s_flags update | |
642 | */ | |
643 | smp_wmb(); | |
644 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
645 | if (EXT4_SB(sb)->s_journal) |
646 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
647 | save_error_info(sb, function, line); | |
648 | } | |
4327ba52 DJ |
649 | if (test_opt(sb, ERRORS_PANIC)) { |
650 | if (EXT4_SB(sb)->s_journal && | |
651 | !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) | |
652 | return; | |
617ba13b | 653 | panic("EXT4-fs panic from previous error\n"); |
4327ba52 | 654 | } |
ac27a0ec DK |
655 | } |
656 | ||
e7c96e8e JP |
657 | void __ext4_msg(struct super_block *sb, |
658 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 659 | { |
0ff2ea7d | 660 | struct va_format vaf; |
b31e1552 ES |
661 | va_list args; |
662 | ||
efbed4dc TT |
663 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) |
664 | return; | |
665 | ||
b31e1552 | 666 | va_start(args, fmt); |
0ff2ea7d JP |
667 | vaf.fmt = fmt; |
668 | vaf.va = &args; | |
669 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
670 | va_end(args); |
671 | } | |
672 | ||
b03a2f7e AD |
673 | #define ext4_warning_ratelimit(sb) \ |
674 | ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ | |
675 | "EXT4-fs warning") | |
676 | ||
12062ddd | 677 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 678 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 679 | { |
0ff2ea7d | 680 | struct va_format vaf; |
ac27a0ec DK |
681 | va_list args; |
682 | ||
b03a2f7e | 683 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
684 | return; |
685 | ||
ac27a0ec | 686 | va_start(args, fmt); |
0ff2ea7d JP |
687 | vaf.fmt = fmt; |
688 | vaf.va = &args; | |
689 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
690 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
691 | va_end(args); |
692 | } | |
693 | ||
b03a2f7e AD |
694 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
695 | unsigned int line, const char *fmt, ...) | |
696 | { | |
697 | struct va_format vaf; | |
698 | va_list args; | |
699 | ||
700 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
701 | return; | |
702 | ||
703 | va_start(args, fmt); | |
704 | vaf.fmt = fmt; | |
705 | vaf.va = &args; | |
706 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
707 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
708 | function, line, inode->i_ino, current->comm, &vaf); | |
709 | va_end(args); | |
710 | } | |
711 | ||
e29136f8 TT |
712 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
713 | struct super_block *sb, ext4_group_t grp, | |
714 | unsigned long ino, ext4_fsblk_t block, | |
715 | const char *fmt, ...) | |
5d1b1b3f AK |
716 | __releases(bitlock) |
717 | __acquires(bitlock) | |
718 | { | |
0ff2ea7d | 719 | struct va_format vaf; |
5d1b1b3f AK |
720 | va_list args; |
721 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
722 | ||
0db1ff22 TT |
723 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
724 | return; | |
725 | ||
1c13d5c0 TT |
726 | es->s_last_error_ino = cpu_to_le32(ino); |
727 | es->s_last_error_block = cpu_to_le64(block); | |
728 | __save_error_info(sb, function, line); | |
0ff2ea7d | 729 | |
efbed4dc TT |
730 | if (ext4_error_ratelimit(sb)) { |
731 | va_start(args, fmt); | |
732 | vaf.fmt = fmt; | |
733 | vaf.va = &args; | |
734 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
735 | sb->s_id, function, line, grp); | |
736 | if (ino) | |
737 | printk(KERN_CONT "inode %lu: ", ino); | |
738 | if (block) | |
739 | printk(KERN_CONT "block %llu:", | |
740 | (unsigned long long) block); | |
741 | printk(KERN_CONT "%pV\n", &vaf); | |
742 | va_end(args); | |
743 | } | |
5d1b1b3f AK |
744 | |
745 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 746 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
747 | return; |
748 | } | |
1c13d5c0 | 749 | |
5d1b1b3f AK |
750 | ext4_unlock_group(sb, grp); |
751 | ext4_handle_error(sb); | |
752 | /* | |
753 | * We only get here in the ERRORS_RO case; relocking the group | |
754 | * may be dangerous, but nothing bad will happen since the | |
755 | * filesystem will have already been marked read/only and the | |
756 | * journal has been aborted. We return 1 as a hint to callers | |
757 | * who might what to use the return value from | |
25985edc | 758 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
759 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
760 | * aggressively from the ext4 function in question, with a | |
761 | * more appropriate error code. | |
762 | */ | |
763 | ext4_lock_group(sb, grp); | |
764 | return; | |
765 | } | |
766 | ||
617ba13b | 767 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 768 | { |
617ba13b | 769 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 770 | |
617ba13b | 771 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
772 | return; |
773 | ||
12062ddd | 774 | ext4_warning(sb, |
ac27a0ec DK |
775 | "updating to rev %d because of new feature flag, " |
776 | "running e2fsck is recommended", | |
617ba13b | 777 | EXT4_DYNAMIC_REV); |
ac27a0ec | 778 | |
617ba13b MC |
779 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
780 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
781 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
782 | /* leave es->s_feature_*compat flags alone */ |
783 | /* es->s_uuid will be set by e2fsck if empty */ | |
784 | ||
785 | /* | |
786 | * The rest of the superblock fields should be zero, and if not it | |
787 | * means they are likely already in use, so leave them alone. We | |
788 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
789 | */ | |
790 | } | |
791 | ||
792 | /* | |
793 | * Open the external journal device | |
794 | */ | |
b31e1552 | 795 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
796 | { |
797 | struct block_device *bdev; | |
798 | char b[BDEVNAME_SIZE]; | |
799 | ||
d4d77629 | 800 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
801 | if (IS_ERR(bdev)) |
802 | goto fail; | |
803 | return bdev; | |
804 | ||
805 | fail: | |
b31e1552 | 806 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
807 | __bdevname(dev, b), PTR_ERR(bdev)); |
808 | return NULL; | |
809 | } | |
810 | ||
811 | /* | |
812 | * Release the journal device | |
813 | */ | |
4385bab1 | 814 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 815 | { |
4385bab1 | 816 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
817 | } |
818 | ||
4385bab1 | 819 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
820 | { |
821 | struct block_device *bdev; | |
ac27a0ec DK |
822 | bdev = sbi->journal_bdev; |
823 | if (bdev) { | |
4385bab1 | 824 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
825 | sbi->journal_bdev = NULL; |
826 | } | |
ac27a0ec DK |
827 | } |
828 | ||
829 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
830 | { | |
617ba13b | 831 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
832 | } |
833 | ||
617ba13b | 834 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
835 | { |
836 | struct list_head *l; | |
837 | ||
b31e1552 ES |
838 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
839 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
840 | |
841 | printk(KERN_ERR "sb_info orphan list:\n"); | |
842 | list_for_each(l, &sbi->s_orphan) { | |
843 | struct inode *inode = orphan_list_entry(l); | |
844 | printk(KERN_ERR " " | |
845 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
846 | inode->i_sb->s_id, inode->i_ino, inode, | |
847 | inode->i_mode, inode->i_nlink, | |
848 | NEXT_ORPHAN(inode)); | |
849 | } | |
850 | } | |
851 | ||
957153fc JK |
852 | #ifdef CONFIG_QUOTA |
853 | static int ext4_quota_off(struct super_block *sb, int type); | |
854 | ||
855 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
856 | { | |
857 | int type; | |
858 | ||
964edf66 JK |
859 | /* Use our quota_off function to clear inode flags etc. */ |
860 | for (type = 0; type < EXT4_MAXQUOTAS; type++) | |
861 | ext4_quota_off(sb, type); | |
957153fc JK |
862 | } |
863 | #else | |
864 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
865 | { | |
866 | } | |
867 | #endif | |
868 | ||
2b2d6d01 | 869 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 870 | { |
617ba13b MC |
871 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
872 | struct ext4_super_block *es = sbi->s_es; | |
97abd7d4 | 873 | int aborted = 0; |
ef2cabf7 | 874 | int i, err; |
ac27a0ec | 875 | |
857ac889 | 876 | ext4_unregister_li_request(sb); |
957153fc | 877 | ext4_quota_off_umount(sb); |
e0ccfd95 | 878 | |
2e8fa54e | 879 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 880 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 881 | |
0390131b | 882 | if (sbi->s_journal) { |
97abd7d4 | 883 | aborted = is_journal_aborted(sbi->s_journal); |
0390131b FM |
884 | err = jbd2_journal_destroy(sbi->s_journal); |
885 | sbi->s_journal = NULL; | |
97abd7d4 | 886 | if ((err < 0) && !aborted) |
c67d859e | 887 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 888 | } |
d4edac31 | 889 | |
ebd173be | 890 | ext4_unregister_sysfs(sb); |
d3922a77 | 891 | ext4_es_unregister_shrinker(sbi); |
9105bb14 | 892 | del_timer_sync(&sbi->s_err_report); |
d4edac31 JB |
893 | ext4_release_system_zone(sb); |
894 | ext4_mb_release(sb); | |
895 | ext4_ext_release(sb); | |
d4edac31 | 896 | |
97abd7d4 | 897 | if (!(sb->s_flags & MS_RDONLY) && !aborted) { |
e2b911c5 | 898 | ext4_clear_feature_journal_needs_recovery(sb); |
ac27a0ec | 899 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 900 | } |
58c5873a | 901 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
902 | ext4_commit_super(sb, 1); |
903 | ||
ac27a0ec DK |
904 | for (i = 0; i < sbi->s_gdb_count; i++) |
905 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 AV |
906 | kvfree(sbi->s_group_desc); |
907 | kvfree(sbi->s_flex_groups); | |
57042651 | 908 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
909 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
910 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 911 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
c8585c6f | 912 | percpu_free_rwsem(&sbi->s_journal_flag_rwsem); |
ac27a0ec | 913 | #ifdef CONFIG_QUOTA |
a2d4a646 | 914 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
915 | kfree(sbi->s_qf_names[i]); |
916 | #endif | |
917 | ||
918 | /* Debugging code just in case the in-memory inode orphan list | |
919 | * isn't empty. The on-disk one can be non-empty if we've | |
920 | * detected an error and taken the fs readonly, but the | |
921 | * in-memory list had better be clean by this point. */ | |
922 | if (!list_empty(&sbi->s_orphan)) | |
923 | dump_orphan_list(sb, sbi); | |
924 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
925 | ||
89d96a6f | 926 | sync_blockdev(sb->s_bdev); |
f98393a6 | 927 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
928 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
929 | /* | |
930 | * Invalidate the journal device's buffers. We don't want them | |
931 | * floating about in memory - the physical journal device may | |
932 | * hotswapped, and it breaks the `ro-after' testing code. | |
933 | */ | |
934 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 935 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 936 | ext4_blkdev_remove(sbi); |
ac27a0ec | 937 | } |
dec214d0 TE |
938 | if (sbi->s_ea_inode_cache) { |
939 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); | |
940 | sbi->s_ea_inode_cache = NULL; | |
941 | } | |
47387409 TE |
942 | if (sbi->s_ea_block_cache) { |
943 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
944 | sbi->s_ea_block_cache = NULL; | |
9c191f70 | 945 | } |
c5e06d10 JL |
946 | if (sbi->s_mmp_tsk) |
947 | kthread_stop(sbi->s_mmp_tsk); | |
9060dd2c | 948 | brelse(sbi->s_sbh); |
ac27a0ec | 949 | sb->s_fs_info = NULL; |
3197ebdb TT |
950 | /* |
951 | * Now that we are completely done shutting down the | |
952 | * superblock, we need to actually destroy the kobject. | |
953 | */ | |
3197ebdb TT |
954 | kobject_put(&sbi->s_kobj); |
955 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
956 | if (sbi->s_chksum_driver) |
957 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 958 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 959 | kfree(sbi); |
ac27a0ec DK |
960 | } |
961 | ||
e18b890b | 962 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
963 | |
964 | /* | |
965 | * Called inside transaction, so use GFP_NOFS | |
966 | */ | |
617ba13b | 967 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 968 | { |
617ba13b | 969 | struct ext4_inode_info *ei; |
ac27a0ec | 970 | |
e6b4f8da | 971 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
972 | if (!ei) |
973 | return NULL; | |
0b8e58a1 | 974 | |
ac27a0ec | 975 | ei->vfs_inode.i_version = 1; |
202ee5df | 976 | spin_lock_init(&ei->i_raw_lock); |
c9de560d AT |
977 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
978 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
979 | ext4_es_init_tree(&ei->i_es_tree); |
980 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 981 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 982 | ei->i_es_all_nr = 0; |
edaa53ca | 983 | ei->i_es_shk_nr = 0; |
dd475925 | 984 | ei->i_es_shrink_lblk = 0; |
d2a17637 | 985 | ei->i_reserved_data_blocks = 0; |
9d0be502 | 986 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 987 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 988 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
989 | #ifdef CONFIG_QUOTA |
990 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 991 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 992 | #endif |
8aefcd55 | 993 | ei->jinode = NULL; |
2e8fa54e | 994 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 995 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
996 | ei->i_sync_tid = 0; |
997 | ei->i_datasync_tid = 0; | |
e27f41e1 | 998 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 999 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
ac27a0ec DK |
1000 | return &ei->vfs_inode; |
1001 | } | |
1002 | ||
7ff9c073 TT |
1003 | static int ext4_drop_inode(struct inode *inode) |
1004 | { | |
1005 | int drop = generic_drop_inode(inode); | |
1006 | ||
1007 | trace_ext4_drop_inode(inode, drop); | |
1008 | return drop; | |
1009 | } | |
1010 | ||
fa0d7e3d NP |
1011 | static void ext4_i_callback(struct rcu_head *head) |
1012 | { | |
1013 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
1014 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
1015 | } | |
1016 | ||
617ba13b | 1017 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 1018 | { |
9f7dd93d | 1019 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
1020 | ext4_msg(inode->i_sb, KERN_ERR, |
1021 | "Inode %lu (%p): orphan list check failed!", | |
1022 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
1023 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
1024 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
1025 | true); | |
1026 | dump_stack(); | |
1027 | } | |
fa0d7e3d | 1028 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
1029 | } |
1030 | ||
51cc5068 | 1031 | static void init_once(void *foo) |
ac27a0ec | 1032 | { |
617ba13b | 1033 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 1034 | |
a35afb83 | 1035 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 1036 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 1037 | init_rwsem(&ei->i_data_sem); |
ea3d7209 | 1038 | init_rwsem(&ei->i_mmap_sem); |
a35afb83 | 1039 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
1040 | } |
1041 | ||
e67bc2b3 | 1042 | static int __init init_inodecache(void) |
ac27a0ec | 1043 | { |
617ba13b MC |
1044 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
1045 | sizeof(struct ext4_inode_info), | |
ac27a0ec | 1046 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 1047 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 1048 | init_once); |
617ba13b | 1049 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1050 | return -ENOMEM; |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | static void destroy_inodecache(void) | |
1055 | { | |
8c0a8537 KS |
1056 | /* |
1057 | * Make sure all delayed rcu free inodes are flushed before we | |
1058 | * destroy cache. | |
1059 | */ | |
1060 | rcu_barrier(); | |
617ba13b | 1061 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1062 | } |
1063 | ||
0930fcc1 | 1064 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1065 | { |
0930fcc1 | 1066 | invalidate_inode_buffers(inode); |
dbd5768f | 1067 | clear_inode(inode); |
9f754758 | 1068 | dquot_drop(inode); |
c2ea3fde | 1069 | ext4_discard_preallocations(inode); |
51865fda | 1070 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
8aefcd55 TT |
1071 | if (EXT4_I(inode)->jinode) { |
1072 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1073 | EXT4_I(inode)->jinode); | |
1074 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1075 | EXT4_I(inode)->jinode = NULL; | |
1076 | } | |
b7236e21 | 1077 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
a7550b30 | 1078 | fscrypt_put_encryption_info(inode, NULL); |
b7236e21 | 1079 | #endif |
ac27a0ec DK |
1080 | } |
1081 | ||
1b961ac0 | 1082 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1083 | u64 ino, u32 generation) |
ac27a0ec | 1084 | { |
ac27a0ec | 1085 | struct inode *inode; |
ac27a0ec | 1086 | |
617ba13b | 1087 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1088 | return ERR_PTR(-ESTALE); |
617ba13b | 1089 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1090 | return ERR_PTR(-ESTALE); |
1091 | ||
1092 | /* iget isn't really right if the inode is currently unallocated!! | |
1093 | * | |
617ba13b | 1094 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1095 | * deleted, so we should be safe. |
1096 | * | |
1097 | * Currently we don't know the generation for parent directory, so | |
1098 | * a generation of 0 means "accept any" | |
1099 | */ | |
f4bb2981 | 1100 | inode = ext4_iget_normal(sb, ino); |
1d1fe1ee DH |
1101 | if (IS_ERR(inode)) |
1102 | return ERR_CAST(inode); | |
1103 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1104 | iput(inode); |
1105 | return ERR_PTR(-ESTALE); | |
1106 | } | |
1b961ac0 CH |
1107 | |
1108 | return inode; | |
1109 | } | |
1110 | ||
1111 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1112 | int fh_len, int fh_type) |
1b961ac0 CH |
1113 | { |
1114 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1115 | ext4_nfs_get_inode); | |
1116 | } | |
1117 | ||
1118 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1119 | int fh_len, int fh_type) |
1b961ac0 CH |
1120 | { |
1121 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1122 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1123 | } |
1124 | ||
c39a7f84 TO |
1125 | /* |
1126 | * Try to release metadata pages (indirect blocks, directories) which are | |
1127 | * mapped via the block device. Since these pages could have journal heads | |
1128 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1129 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1130 | */ | |
0b8e58a1 AD |
1131 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1132 | gfp_t wait) | |
c39a7f84 TO |
1133 | { |
1134 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1135 | ||
1136 | WARN_ON(PageChecked(page)); | |
1137 | if (!page_has_buffers(page)) | |
1138 | return 0; | |
1139 | if (journal) | |
1140 | return jbd2_journal_try_to_free_buffers(journal, page, | |
d0164adc | 1141 | wait & ~__GFP_DIRECT_RECLAIM); |
c39a7f84 TO |
1142 | return try_to_free_buffers(page); |
1143 | } | |
1144 | ||
a7550b30 JK |
1145 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
1146 | static int ext4_get_context(struct inode *inode, void *ctx, size_t len) | |
1147 | { | |
1148 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, | |
1149 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); | |
1150 | } | |
1151 | ||
a7550b30 JK |
1152 | static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, |
1153 | void *fs_data) | |
1154 | { | |
2f8f5e76 | 1155 | handle_t *handle = fs_data; |
c1a5d5f6 | 1156 | int res, res2, credits, retries = 0; |
2f8f5e76 | 1157 | |
9ce0151a EB |
1158 | /* |
1159 | * Encrypting the root directory is not allowed because e2fsck expects | |
1160 | * lost+found to exist and be unencrypted, and encrypting the root | |
1161 | * directory would imply encrypting the lost+found directory as well as | |
1162 | * the filename "lost+found" itself. | |
1163 | */ | |
1164 | if (inode->i_ino == EXT4_ROOT_INO) | |
1165 | return -EPERM; | |
2f8f5e76 | 1166 | |
94840e3c EB |
1167 | res = ext4_convert_inline_data(inode); |
1168 | if (res) | |
1169 | return res; | |
1170 | ||
2f8f5e76 EB |
1171 | /* |
1172 | * If a journal handle was specified, then the encryption context is | |
1173 | * being set on a new inode via inheritance and is part of a larger | |
1174 | * transaction to create the inode. Otherwise the encryption context is | |
1175 | * being set on an existing inode in its own transaction. Only in the | |
1176 | * latter case should the "retry on ENOSPC" logic be used. | |
1177 | */ | |
a7550b30 | 1178 | |
2f8f5e76 EB |
1179 | if (handle) { |
1180 | res = ext4_xattr_set_handle(handle, inode, | |
1181 | EXT4_XATTR_INDEX_ENCRYPTION, | |
1182 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1183 | ctx, len, 0); | |
a7550b30 JK |
1184 | if (!res) { |
1185 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
1186 | ext4_clear_inode_state(inode, | |
1187 | EXT4_STATE_MAY_INLINE_DATA); | |
a3caa24b JK |
1188 | /* |
1189 | * Update inode->i_flags - e.g. S_DAX may get disabled | |
1190 | */ | |
1191 | ext4_set_inode_flags(inode); | |
a7550b30 JK |
1192 | } |
1193 | return res; | |
1194 | } | |
1195 | ||
b8cb5a54 TE |
1196 | res = dquot_initialize(inode); |
1197 | if (res) | |
1198 | return res; | |
2f8f5e76 | 1199 | retry: |
af65207c TE |
1200 | res = ext4_xattr_set_credits(inode, len, false /* is_create */, |
1201 | &credits); | |
dec214d0 TE |
1202 | if (res) |
1203 | return res; | |
1204 | ||
c1a5d5f6 | 1205 | handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); |
a7550b30 JK |
1206 | if (IS_ERR(handle)) |
1207 | return PTR_ERR(handle); | |
1208 | ||
2f8f5e76 EB |
1209 | res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, |
1210 | EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, | |
1211 | ctx, len, 0); | |
a7550b30 JK |
1212 | if (!res) { |
1213 | ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); | |
a3caa24b JK |
1214 | /* Update inode->i_flags - e.g. S_DAX may get disabled */ |
1215 | ext4_set_inode_flags(inode); | |
a7550b30 JK |
1216 | res = ext4_mark_inode_dirty(handle, inode); |
1217 | if (res) | |
1218 | EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); | |
1219 | } | |
1220 | res2 = ext4_journal_stop(handle); | |
2f8f5e76 EB |
1221 | |
1222 | if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) | |
1223 | goto retry; | |
a7550b30 JK |
1224 | if (!res) |
1225 | res = res2; | |
1226 | return res; | |
1227 | } | |
1228 | ||
c250b7dd | 1229 | static bool ext4_dummy_context(struct inode *inode) |
a7550b30 JK |
1230 | { |
1231 | return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); | |
1232 | } | |
1233 | ||
1234 | static unsigned ext4_max_namelen(struct inode *inode) | |
1235 | { | |
1236 | return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : | |
1237 | EXT4_NAME_LEN; | |
1238 | } | |
1239 | ||
6f69f0ed | 1240 | static const struct fscrypt_operations ext4_cryptops = { |
a5d431ef | 1241 | .key_prefix = "ext4:", |
a7550b30 | 1242 | .get_context = ext4_get_context, |
a7550b30 JK |
1243 | .set_context = ext4_set_context, |
1244 | .dummy_context = ext4_dummy_context, | |
1245 | .is_encrypted = ext4_encrypted_inode, | |
1246 | .empty_dir = ext4_empty_dir, | |
1247 | .max_namelen = ext4_max_namelen, | |
1248 | }; | |
1249 | #else | |
6f69f0ed | 1250 | static const struct fscrypt_operations ext4_cryptops = { |
a7550b30 JK |
1251 | .is_encrypted = ext4_encrypted_inode, |
1252 | }; | |
1253 | #endif | |
1254 | ||
ac27a0ec | 1255 | #ifdef CONFIG_QUOTA |
d6006186 | 1256 | static const char * const quotatypes[] = INITQFNAMES; |
689c958c | 1257 | #define QTYPE2NAME(t) (quotatypes[t]) |
ac27a0ec | 1258 | |
617ba13b MC |
1259 | static int ext4_write_dquot(struct dquot *dquot); |
1260 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1261 | static int ext4_release_dquot(struct dquot *dquot); | |
1262 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1263 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1264 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 1265 | const struct path *path); |
617ba13b MC |
1266 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1267 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1268 | size_t len, loff_t off); |
617ba13b | 1269 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1270 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1271 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1272 | unsigned int flags); | |
1273 | static int ext4_enable_quotas(struct super_block *sb); | |
8f0e8746 | 1274 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); |
ac27a0ec | 1275 | |
96c7e0d9 JK |
1276 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1277 | { | |
1278 | return EXT4_I(inode)->i_dquot; | |
1279 | } | |
1280 | ||
61e225dc | 1281 | static const struct dquot_operations ext4_quota_operations = { |
7a9ca53a TE |
1282 | .get_reserved_space = ext4_get_reserved_space, |
1283 | .write_dquot = ext4_write_dquot, | |
1284 | .acquire_dquot = ext4_acquire_dquot, | |
1285 | .release_dquot = ext4_release_dquot, | |
1286 | .mark_dirty = ext4_mark_dquot_dirty, | |
1287 | .write_info = ext4_write_info, | |
1288 | .alloc_dquot = dquot_alloc, | |
1289 | .destroy_dquot = dquot_destroy, | |
1290 | .get_projid = ext4_get_projid, | |
1291 | .get_inode_usage = ext4_get_inode_usage, | |
1292 | .get_next_id = ext4_get_next_id, | |
ac27a0ec DK |
1293 | }; |
1294 | ||
0d54b217 | 1295 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1296 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1297 | .quota_off = ext4_quota_off, |
287a8095 | 1298 | .quota_sync = dquot_quota_sync, |
0a240339 | 1299 | .get_state = dquot_get_state, |
287a8095 CH |
1300 | .set_info = dquot_set_dqinfo, |
1301 | .get_dqblk = dquot_get_dqblk, | |
6332b9b5 ES |
1302 | .set_dqblk = dquot_set_dqblk, |
1303 | .get_nextdqblk = dquot_get_next_dqblk, | |
ac27a0ec DK |
1304 | }; |
1305 | #endif | |
1306 | ||
ee9b6d61 | 1307 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1308 | .alloc_inode = ext4_alloc_inode, |
1309 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1310 | .write_inode = ext4_write_inode, |
1311 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1312 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1313 | .evict_inode = ext4_evict_inode, |
617ba13b | 1314 | .put_super = ext4_put_super, |
617ba13b | 1315 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1316 | .freeze_fs = ext4_freeze, |
1317 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1318 | .statfs = ext4_statfs, |
1319 | .remount_fs = ext4_remount, | |
617ba13b | 1320 | .show_options = ext4_show_options, |
ac27a0ec | 1321 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1322 | .quota_read = ext4_quota_read, |
1323 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1324 | .get_dquots = ext4_get_dquots, |
ac27a0ec | 1325 | #endif |
c39a7f84 | 1326 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1327 | }; |
1328 | ||
39655164 | 1329 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1330 | .fh_to_dentry = ext4_fh_to_dentry, |
1331 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1332 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1333 | }; |
1334 | ||
1335 | enum { | |
1336 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1337 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1338 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1339 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1340 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1341 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1342 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1343 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1344 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
ac27a0ec | 1345 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1346 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1347 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
49da9392 | 1348 | Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, |
1449032b | 1349 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
670e9875 | 1350 | Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, |
1449032b | 1351 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1352 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1353 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1354 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
cdb7ee4c | 1355 | Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, |
ac27a0ec DK |
1356 | }; |
1357 | ||
a447c093 | 1358 | static const match_table_t tokens = { |
ac27a0ec DK |
1359 | {Opt_bsd_df, "bsddf"}, |
1360 | {Opt_minix_df, "minixdf"}, | |
1361 | {Opt_grpid, "grpid"}, | |
1362 | {Opt_grpid, "bsdgroups"}, | |
1363 | {Opt_nogrpid, "nogrpid"}, | |
1364 | {Opt_nogrpid, "sysvgroups"}, | |
1365 | {Opt_resgid, "resgid=%u"}, | |
1366 | {Opt_resuid, "resuid=%u"}, | |
1367 | {Opt_sb, "sb=%u"}, | |
1368 | {Opt_err_cont, "errors=continue"}, | |
1369 | {Opt_err_panic, "errors=panic"}, | |
1370 | {Opt_err_ro, "errors=remount-ro"}, | |
1371 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1372 | {Opt_debug, "debug"}, |
72578c33 TT |
1373 | {Opt_removed, "oldalloc"}, |
1374 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1375 | {Opt_user_xattr, "user_xattr"}, |
1376 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1377 | {Opt_acl, "acl"}, | |
1378 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1379 | {Opt_noload, "norecovery"}, |
5a916be1 | 1380 | {Opt_noload, "noload"}, |
72578c33 TT |
1381 | {Opt_removed, "nobh"}, |
1382 | {Opt_removed, "bh"}, | |
ac27a0ec | 1383 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1384 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1385 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1386 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1387 | {Opt_journal_path, "journal_path=%s"}, |
818d276c | 1388 | {Opt_journal_checksum, "journal_checksum"}, |
c6d3d56d | 1389 | {Opt_nojournal_checksum, "nojournal_checksum"}, |
818d276c | 1390 | {Opt_journal_async_commit, "journal_async_commit"}, |
ac27a0ec DK |
1391 | {Opt_abort, "abort"}, |
1392 | {Opt_data_journal, "data=journal"}, | |
1393 | {Opt_data_ordered, "data=ordered"}, | |
1394 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1395 | {Opt_data_err_abort, "data_err=abort"}, |
1396 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1397 | {Opt_offusrjquota, "usrjquota="}, |
1398 | {Opt_usrjquota, "usrjquota=%s"}, | |
1399 | {Opt_offgrpjquota, "grpjquota="}, | |
1400 | {Opt_grpjquota, "grpjquota=%s"}, | |
1401 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1402 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1403 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1404 | {Opt_grpquota, "grpquota"}, |
1405 | {Opt_noquota, "noquota"}, | |
1406 | {Opt_quota, "quota"}, | |
1407 | {Opt_usrquota, "usrquota"}, | |
49da9392 | 1408 | {Opt_prjquota, "prjquota"}, |
ac27a0ec | 1409 | {Opt_barrier, "barrier=%u"}, |
06705bff TT |
1410 | {Opt_barrier, "barrier"}, |
1411 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1412 | {Opt_i_version, "i_version"}, |
923ae0ff | 1413 | {Opt_dax, "dax"}, |
c9de560d | 1414 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1415 | {Opt_delalloc, "delalloc"}, |
a26f4992 TT |
1416 | {Opt_lazytime, "lazytime"}, |
1417 | {Opt_nolazytime, "nolazytime"}, | |
670e9875 | 1418 | {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, |
dd919b98 | 1419 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1420 | {Opt_removed, "mblk_io_submit"}, |
1421 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1422 | {Opt_block_validity, "block_validity"}, |
1423 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1424 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1425 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1426 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1427 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1428 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1429 | {Opt_dioread_nolock, "dioread_nolock"}, |
1430 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1431 | {Opt_discard, "discard"}, |
1432 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1433 | {Opt_init_itable, "init_itable=%u"}, |
1434 | {Opt_init_itable, "init_itable"}, | |
1435 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1436 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
6ddb2447 | 1437 | {Opt_test_dummy_encryption, "test_dummy_encryption"}, |
cdb7ee4c TE |
1438 | {Opt_nombcache, "nombcache"}, |
1439 | {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ | |
c7198b9c TT |
1440 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1441 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1442 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1443 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1444 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1445 | {Opt_err, NULL}, |
ac27a0ec DK |
1446 | }; |
1447 | ||
617ba13b | 1448 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1449 | { |
617ba13b | 1450 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1451 | char *options = (char *) *data; |
1452 | ||
1453 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1454 | return 1; /* Default location */ | |
0b8e58a1 | 1455 | |
ac27a0ec | 1456 | options += 3; |
0b8e58a1 | 1457 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1458 | sb_block = simple_strtoul(options, &options, 0); |
1459 | if (*options && *options != ',') { | |
4776004f | 1460 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1461 | (char *) *data); |
1462 | return 1; | |
1463 | } | |
1464 | if (*options == ',') | |
1465 | options++; | |
1466 | *data = (void *) options; | |
0b8e58a1 | 1467 | |
ac27a0ec DK |
1468 | return sb_block; |
1469 | } | |
1470 | ||
b3881f74 | 1471 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
d6006186 EB |
1472 | static const char deprecated_msg[] = |
1473 | "Mount option \"%s\" will be removed by %s\n" | |
437ca0fd | 1474 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; |
b3881f74 | 1475 | |
56c50f11 DM |
1476 | #ifdef CONFIG_QUOTA |
1477 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1478 | { | |
1479 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1480 | char *qname; | |
03dafb5f | 1481 | int ret = -1; |
56c50f11 DM |
1482 | |
1483 | if (sb_any_quota_loaded(sb) && | |
1484 | !sbi->s_qf_names[qtype]) { | |
1485 | ext4_msg(sb, KERN_ERR, | |
1486 | "Cannot change journaled " | |
1487 | "quota options when quota turned on"); | |
57f73c2c | 1488 | return -1; |
56c50f11 | 1489 | } |
e2b911c5 | 1490 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1491 | ext4_msg(sb, KERN_INFO, "Journaled quota options " |
1492 | "ignored when QUOTA feature is enabled"); | |
1493 | return 1; | |
262b4662 | 1494 | } |
56c50f11 DM |
1495 | qname = match_strdup(args); |
1496 | if (!qname) { | |
1497 | ext4_msg(sb, KERN_ERR, | |
1498 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1499 | return -1; |
56c50f11 | 1500 | } |
03dafb5f CG |
1501 | if (sbi->s_qf_names[qtype]) { |
1502 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1503 | ret = 1; | |
1504 | else | |
1505 | ext4_msg(sb, KERN_ERR, | |
1506 | "%s quota file already specified", | |
1507 | QTYPE2NAME(qtype)); | |
1508 | goto errout; | |
56c50f11 | 1509 | } |
03dafb5f | 1510 | if (strchr(qname, '/')) { |
56c50f11 DM |
1511 | ext4_msg(sb, KERN_ERR, |
1512 | "quotafile must be on filesystem root"); | |
03dafb5f | 1513 | goto errout; |
56c50f11 | 1514 | } |
03dafb5f | 1515 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1516 | set_opt(sb, QUOTA); |
56c50f11 | 1517 | return 1; |
03dafb5f CG |
1518 | errout: |
1519 | kfree(qname); | |
1520 | return ret; | |
56c50f11 DM |
1521 | } |
1522 | ||
1523 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1524 | { | |
1525 | ||
1526 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1527 | ||
1528 | if (sb_any_quota_loaded(sb) && | |
1529 | sbi->s_qf_names[qtype]) { | |
1530 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1531 | " when quota turned on"); | |
57f73c2c | 1532 | return -1; |
56c50f11 | 1533 | } |
03dafb5f | 1534 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1535 | sbi->s_qf_names[qtype] = NULL; |
1536 | return 1; | |
1537 | } | |
1538 | #endif | |
1539 | ||
26092bf5 TT |
1540 | #define MOPT_SET 0x0001 |
1541 | #define MOPT_CLEAR 0x0002 | |
1542 | #define MOPT_NOSUPPORT 0x0004 | |
1543 | #define MOPT_EXPLICIT 0x0008 | |
1544 | #define MOPT_CLEAR_ERR 0x0010 | |
1545 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1546 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1547 | #define MOPT_Q 0 |
1548 | #define MOPT_QFMT 0x0040 | |
1549 | #else | |
1550 | #define MOPT_Q MOPT_NOSUPPORT | |
1551 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1552 | #endif |
26092bf5 | 1553 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1554 | #define MOPT_NO_EXT2 0x0100 |
1555 | #define MOPT_NO_EXT3 0x0200 | |
1556 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1557 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1558 | |
1559 | static const struct mount_opts { | |
1560 | int token; | |
1561 | int mount_opt; | |
1562 | int flags; | |
1563 | } ext4_mount_opts[] = { | |
1564 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1565 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1566 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1567 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1568 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1569 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1570 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1571 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1572 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1573 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1574 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1575 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1576 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1577 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1578 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1579 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
c6d3d56d DW |
1580 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1581 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1582 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1583 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1584 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1585 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1586 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1587 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
26092bf5 TT |
1588 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1589 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1590 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c | 1591 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1592 | MOPT_NO_EXT2}, |
8dc0aa8c | 1593 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, |
7915a861 | 1594 | MOPT_NO_EXT2}, |
26092bf5 TT |
1595 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1596 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1597 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1598 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1599 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1600 | {Opt_commit, 0, MOPT_GTE0}, | |
1601 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1602 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1603 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1604 | {Opt_init_itable, 0, MOPT_GTE0}, | |
923ae0ff | 1605 | {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, |
26092bf5 | 1606 | {Opt_stripe, 0, MOPT_GTE0}, |
0efb3b23 JK |
1607 | {Opt_resuid, 0, MOPT_GTE0}, |
1608 | {Opt_resgid, 0, MOPT_GTE0}, | |
5ba92bcf CM |
1609 | {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, |
1610 | {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, | |
1611 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, | |
8dc0aa8c TT |
1612 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1613 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1614 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1615 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1616 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1617 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1618 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1619 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1620 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1621 | #else |
26092bf5 TT |
1622 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1623 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1624 | #endif |
26092bf5 TT |
1625 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1626 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
670e9875 | 1627 | {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, |
26092bf5 TT |
1628 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, |
1629 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1630 | MOPT_SET | MOPT_Q}, | |
1631 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1632 | MOPT_SET | MOPT_Q}, | |
49da9392 JK |
1633 | {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, |
1634 | MOPT_SET | MOPT_Q}, | |
26092bf5 | 1635 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
49da9392 JK |
1636 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), |
1637 | MOPT_CLEAR | MOPT_Q}, | |
26092bf5 TT |
1638 | {Opt_usrjquota, 0, MOPT_Q}, |
1639 | {Opt_grpjquota, 0, MOPT_Q}, | |
1640 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1641 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1642 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1643 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1644 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1645 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
6ddb2447 | 1646 | {Opt_test_dummy_encryption, 0, MOPT_GTE0}, |
cdb7ee4c | 1647 | {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, |
26092bf5 TT |
1648 | {Opt_err, 0, 0} |
1649 | }; | |
1650 | ||
1651 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1652 | substring_t *args, unsigned long *journal_devnum, | |
1653 | unsigned int *journal_ioprio, int is_remount) | |
1654 | { | |
1655 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1656 | const struct mount_opts *m; | |
08cefc7a EB |
1657 | kuid_t uid; |
1658 | kgid_t gid; | |
26092bf5 TT |
1659 | int arg = 0; |
1660 | ||
57f73c2c TT |
1661 | #ifdef CONFIG_QUOTA |
1662 | if (token == Opt_usrjquota) | |
1663 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1664 | else if (token == Opt_grpjquota) | |
1665 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1666 | else if (token == Opt_offusrjquota) | |
1667 | return clear_qf_name(sb, USRQUOTA); | |
1668 | else if (token == Opt_offgrpjquota) | |
1669 | return clear_qf_name(sb, GRPQUOTA); | |
1670 | #endif | |
26092bf5 | 1671 | switch (token) { |
f7048605 TT |
1672 | case Opt_noacl: |
1673 | case Opt_nouser_xattr: | |
1674 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1675 | break; | |
26092bf5 TT |
1676 | case Opt_sb: |
1677 | return 1; /* handled by get_sb_block() */ | |
1678 | case Opt_removed: | |
5f3633e3 | 1679 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1680 | return 1; |
26092bf5 TT |
1681 | case Opt_abort: |
1682 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1683 | return 1; | |
1684 | case Opt_i_version: | |
1685 | sb->s_flags |= MS_I_VERSION; | |
1686 | return 1; | |
a26f4992 TT |
1687 | case Opt_lazytime: |
1688 | sb->s_flags |= MS_LAZYTIME; | |
1689 | return 1; | |
1690 | case Opt_nolazytime: | |
1691 | sb->s_flags &= ~MS_LAZYTIME; | |
1692 | return 1; | |
26092bf5 TT |
1693 | } |
1694 | ||
5f3633e3 JK |
1695 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1696 | if (token == m->token) | |
1697 | break; | |
1698 | ||
1699 | if (m->token == Opt_err) { | |
1700 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1701 | "or missing value", opt); | |
1702 | return -1; | |
1703 | } | |
1704 | ||
8dc0aa8c TT |
1705 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1706 | ext4_msg(sb, KERN_ERR, | |
1707 | "Mount option \"%s\" incompatible with ext2", opt); | |
1708 | return -1; | |
1709 | } | |
1710 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1711 | ext4_msg(sb, KERN_ERR, | |
1712 | "Mount option \"%s\" incompatible with ext3", opt); | |
1713 | return -1; | |
1714 | } | |
1715 | ||
afdbd4a6 SF |
1716 | if (token == Opt_err_panic && !capable(CAP_SYS_ADMIN)) { |
1717 | ext4_msg(sb, KERN_ERR, | |
1718 | "Mount option \"%s\" not allowed for unprivileged mounts", | |
1719 | opt); | |
1720 | return -1; | |
1721 | } | |
1722 | ||
ad4eec61 | 1723 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1724 | return -1; |
1725 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1726 | return -1; | |
c93cf2d7 DM |
1727 | if (m->flags & MOPT_EXPLICIT) { |
1728 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
1729 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1e381f60 DM |
1730 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { |
1731 | set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); | |
c93cf2d7 DM |
1732 | } else |
1733 | return -1; | |
1734 | } | |
5f3633e3 JK |
1735 | if (m->flags & MOPT_CLEAR_ERR) |
1736 | clear_opt(sb, ERRORS_MASK); | |
1737 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1738 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1739 | "options when quota turned on"); | |
1740 | return -1; | |
1741 | } | |
1742 | ||
1743 | if (m->flags & MOPT_NOSUPPORT) { | |
1744 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1745 | } else if (token == Opt_commit) { | |
1746 | if (arg == 0) | |
1747 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1748 | sbi->s_commit_interval = HZ * arg; | |
670e9875 TT |
1749 | } else if (token == Opt_debug_want_extra_isize) { |
1750 | sbi->s_want_extra_isize = arg; | |
5f3633e3 | 1751 | } else if (token == Opt_max_batch_time) { |
5f3633e3 JK |
1752 | sbi->s_max_batch_time = arg; |
1753 | } else if (token == Opt_min_batch_time) { | |
1754 | sbi->s_min_batch_time = arg; | |
1755 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1756 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1757 | ext4_msg(sb, KERN_ERR, | |
1758 | "EXT4-fs: inode_readahead_blks must be " | |
1759 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1760 | return -1; |
5f3633e3 JK |
1761 | } |
1762 | sbi->s_inode_readahead_blks = arg; | |
1763 | } else if (token == Opt_init_itable) { | |
1764 | set_opt(sb, INIT_INODE_TABLE); | |
1765 | if (!args->from) | |
1766 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1767 | sbi->s_li_wait_mult = arg; | |
1768 | } else if (token == Opt_max_dir_size_kb) { | |
1769 | sbi->s_max_dir_size_kb = arg; | |
1770 | } else if (token == Opt_stripe) { | |
1771 | sbi->s_stripe = arg; | |
1772 | } else if (token == Opt_resuid) { | |
afdbd4a6 | 1773 | uid = make_kuid(sb->s_user_ns, arg); |
5f3633e3 JK |
1774 | if (!uid_valid(uid)) { |
1775 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1776 | return -1; |
1777 | } | |
5f3633e3 JK |
1778 | sbi->s_resuid = uid; |
1779 | } else if (token == Opt_resgid) { | |
afdbd4a6 | 1780 | gid = make_kgid(sb->s_user_ns, arg); |
5f3633e3 JK |
1781 | if (!gid_valid(gid)) { |
1782 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1783 | return -1; | |
1784 | } | |
1785 | sbi->s_resgid = gid; | |
1786 | } else if (token == Opt_journal_dev) { | |
1787 | if (is_remount) { | |
1788 | ext4_msg(sb, KERN_ERR, | |
1789 | "Cannot specify journal on remount"); | |
1790 | return -1; | |
1791 | } | |
1792 | *journal_devnum = arg; | |
ad4eec61 ES |
1793 | } else if (token == Opt_journal_path) { |
1794 | char *journal_path; | |
1795 | struct inode *journal_inode; | |
1796 | struct path path; | |
1797 | int error; | |
1798 | ||
1799 | if (is_remount) { | |
1800 | ext4_msg(sb, KERN_ERR, | |
1801 | "Cannot specify journal on remount"); | |
1802 | return -1; | |
1803 | } | |
1804 | journal_path = match_strdup(&args[0]); | |
1805 | if (!journal_path) { | |
1806 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1807 | "journal device string"); | |
1808 | return -1; | |
1809 | } | |
1810 | ||
1811 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1812 | if (error) { | |
1813 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1814 | "journal device path: error %d", error); | |
1815 | kfree(journal_path); | |
1816 | return -1; | |
1817 | } | |
1818 | ||
afdbd4a6 SF |
1819 | /* |
1820 | * Refuse access for unprivileged mounts if the user does | |
1821 | * not have rw access to the journal device via the supplied | |
1822 | * path. | |
1823 | */ | |
1824 | if (!capable(CAP_SYS_ADMIN) && | |
1825 | inode_permission(d_inode(path.dentry), MAY_READ|MAY_WRITE)) { | |
1826 | ext4_msg(sb, KERN_ERR, | |
1827 | "error: Insufficient access to journal path %s", | |
1828 | journal_path); | |
1829 | return -1; | |
1830 | } | |
1831 | ||
2b0143b5 | 1832 | journal_inode = d_inode(path.dentry); |
ad4eec61 ES |
1833 | if (!S_ISBLK(journal_inode->i_mode)) { |
1834 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1835 | "is not a block device", journal_path); | |
1836 | path_put(&path); | |
1837 | kfree(journal_path); | |
1838 | return -1; | |
1839 | } | |
1840 | ||
1841 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1842 | path_put(&path); | |
1843 | kfree(journal_path); | |
5f3633e3 JK |
1844 | } else if (token == Opt_journal_ioprio) { |
1845 | if (arg > 7) { | |
1846 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1847 | " (must be 0-7)"); | |
1848 | return -1; | |
1849 | } | |
1850 | *journal_ioprio = | |
1851 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
6ddb2447 TT |
1852 | } else if (token == Opt_test_dummy_encryption) { |
1853 | #ifdef CONFIG_EXT4_FS_ENCRYPTION | |
1854 | sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; | |
1855 | ext4_msg(sb, KERN_WARNING, | |
1856 | "Test dummy encryption mode enabled"); | |
1857 | #else | |
1858 | ext4_msg(sb, KERN_WARNING, | |
1859 | "Test dummy encryption mount option ignored"); | |
1860 | #endif | |
5f3633e3 JK |
1861 | } else if (m->flags & MOPT_DATAJ) { |
1862 | if (is_remount) { | |
1863 | if (!sbi->s_journal) | |
1864 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1865 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1866 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1867 | "Cannot change data mode on remount"); |
26092bf5 | 1868 | return -1; |
ac27a0ec | 1869 | } |
26092bf5 | 1870 | } else { |
5f3633e3 JK |
1871 | clear_opt(sb, DATA_FLAGS); |
1872 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1873 | } |
5f3633e3 JK |
1874 | #ifdef CONFIG_QUOTA |
1875 | } else if (m->flags & MOPT_QFMT) { | |
1876 | if (sb_any_quota_loaded(sb) && | |
1877 | sbi->s_jquota_fmt != m->mount_opt) { | |
1878 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1879 | "quota options when quota turned on"); | |
1880 | return -1; | |
1881 | } | |
e2b911c5 | 1882 | if (ext4_has_feature_quota(sb)) { |
c325a67c TT |
1883 | ext4_msg(sb, KERN_INFO, |
1884 | "Quota format mount options ignored " | |
262b4662 | 1885 | "when QUOTA feature is enabled"); |
c325a67c | 1886 | return 1; |
262b4662 | 1887 | } |
5f3633e3 | 1888 | sbi->s_jquota_fmt = m->mount_opt; |
923ae0ff | 1889 | #endif |
923ae0ff | 1890 | } else if (token == Opt_dax) { |
ef83b6e8 DW |
1891 | #ifdef CONFIG_FS_DAX |
1892 | ext4_msg(sb, KERN_WARNING, | |
1893 | "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); | |
1894 | sbi->s_mount_opt |= m->mount_opt; | |
1895 | #else | |
923ae0ff RZ |
1896 | ext4_msg(sb, KERN_INFO, "dax option not supported"); |
1897 | return -1; | |
5f3633e3 | 1898 | #endif |
7915a861 AN |
1899 | } else if (token == Opt_data_err_abort) { |
1900 | sbi->s_mount_opt |= m->mount_opt; | |
1901 | } else if (token == Opt_data_err_ignore) { | |
1902 | sbi->s_mount_opt &= ~m->mount_opt; | |
5f3633e3 JK |
1903 | } else { |
1904 | if (!args->from) | |
1905 | arg = 1; | |
1906 | if (m->flags & MOPT_CLEAR) | |
1907 | arg = !arg; | |
1908 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1909 | ext4_msg(sb, KERN_WARNING, | |
1910 | "buggy handling of option %s", opt); | |
1911 | WARN_ON(1); | |
1912 | return -1; | |
1913 | } | |
1914 | if (arg != 0) | |
1915 | sbi->s_mount_opt |= m->mount_opt; | |
1916 | else | |
1917 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1918 | } |
5f3633e3 | 1919 | return 1; |
26092bf5 TT |
1920 | } |
1921 | ||
1922 | static int parse_options(char *options, struct super_block *sb, | |
1923 | unsigned long *journal_devnum, | |
1924 | unsigned int *journal_ioprio, | |
1925 | int is_remount) | |
1926 | { | |
1927 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1928 | char *p; | |
1929 | substring_t args[MAX_OPT_ARGS]; | |
1930 | int token; | |
1931 | ||
1932 | if (!options) | |
1933 | return 1; | |
1934 | ||
1935 | while ((p = strsep(&options, ",")) != NULL) { | |
1936 | if (!*p) | |
1937 | continue; | |
1938 | /* | |
1939 | * Initialize args struct so we know whether arg was | |
1940 | * found; some options take optional arguments. | |
1941 | */ | |
caecd0af | 1942 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1943 | token = match_token(p, tokens, args); |
1944 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1945 | journal_ioprio, is_remount) < 0) | |
1946 | return 0; | |
ac27a0ec DK |
1947 | } |
1948 | #ifdef CONFIG_QUOTA | |
49da9392 JK |
1949 | /* |
1950 | * We do the test below only for project quotas. 'usrquota' and | |
1951 | * 'grpquota' mount options are allowed even without quota feature | |
1952 | * to support legacy quotas in quota files. | |
1953 | */ | |
1954 | if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { | |
1955 | ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " | |
1956 | "Cannot enable project quota enforcement."); | |
1957 | return 0; | |
1958 | } | |
1959 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1960 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1961 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1962 | |
482a7425 | 1963 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1964 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1965 | |
56c50f11 | 1966 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1967 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1968 | "format mixing"); | |
ac27a0ec DK |
1969 | return 0; |
1970 | } | |
1971 | ||
1972 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1973 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1974 | "not specified"); | |
ac27a0ec DK |
1975 | return 0; |
1976 | } | |
ac27a0ec DK |
1977 | } |
1978 | #endif | |
261cb20c JK |
1979 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1980 | int blocksize = | |
1981 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1982 | ||
09cbfeaf | 1983 | if (blocksize < PAGE_SIZE) { |
261cb20c JK |
1984 | ext4_msg(sb, KERN_ERR, "can't mount with " |
1985 | "dioread_nolock if block size != PAGE_SIZE"); | |
1986 | return 0; | |
1987 | } | |
1988 | } | |
ac27a0ec DK |
1989 | return 1; |
1990 | } | |
1991 | ||
2adf6da8 TT |
1992 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1993 | struct super_block *sb) | |
1994 | { | |
1995 | #if defined(CONFIG_QUOTA) | |
1996 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1997 | ||
1998 | if (sbi->s_jquota_fmt) { | |
1999 | char *fmtname = ""; | |
2000 | ||
2001 | switch (sbi->s_jquota_fmt) { | |
2002 | case QFMT_VFS_OLD: | |
2003 | fmtname = "vfsold"; | |
2004 | break; | |
2005 | case QFMT_VFS_V0: | |
2006 | fmtname = "vfsv0"; | |
2007 | break; | |
2008 | case QFMT_VFS_V1: | |
2009 | fmtname = "vfsv1"; | |
2010 | break; | |
2011 | } | |
2012 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
2013 | } | |
2014 | ||
2015 | if (sbi->s_qf_names[USRQUOTA]) | |
a068acf2 | 2016 | seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); |
2adf6da8 TT |
2017 | |
2018 | if (sbi->s_qf_names[GRPQUOTA]) | |
a068acf2 | 2019 | seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); |
2adf6da8 TT |
2020 | #endif |
2021 | } | |
2022 | ||
5a916be1 TT |
2023 | static const char *token2str(int token) |
2024 | { | |
50df9fd5 | 2025 | const struct match_token *t; |
5a916be1 TT |
2026 | |
2027 | for (t = tokens; t->token != Opt_err; t++) | |
2028 | if (t->token == token && !strchr(t->pattern, '=')) | |
2029 | break; | |
2030 | return t->pattern; | |
2031 | } | |
2032 | ||
2adf6da8 TT |
2033 | /* |
2034 | * Show an option if | |
2035 | * - it's set to a non-default value OR | |
2036 | * - if the per-sb default is different from the global default | |
2037 | */ | |
66acdcf4 TT |
2038 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
2039 | int nodefs) | |
2adf6da8 | 2040 | { |
2adf6da8 TT |
2041 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2042 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 2043 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 2044 | const struct mount_opts *m; |
66acdcf4 | 2045 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 2046 | |
66acdcf4 TT |
2047 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
2048 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
2049 | |
2050 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
2051 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
2052 | ||
2053 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
2054 | int want_set = m->flags & MOPT_SET; | |
2055 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
2056 | (m->flags & MOPT_CLEAR_ERR)) | |
2057 | continue; | |
66acdcf4 | 2058 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
2059 | continue; /* skip if same as the default */ |
2060 | if ((want_set && | |
2061 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
2062 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
2063 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
2064 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 2065 | } |
5a916be1 | 2066 | |
afdbd4a6 | 2067 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(sb->s_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 2068 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a | 2069 | SEQ_OPTS_PRINT("resuid=%u", |
afdbd4a6 SF |
2070 | from_kuid_munged(sb->s_user_ns, sbi->s_resuid)); |
2071 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(sb->s_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 2072 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a | 2073 | SEQ_OPTS_PRINT("resgid=%u", |
afdbd4a6 | 2074 | from_kgid_munged(sb->s_user_ns, sbi->s_resgid)); |
66acdcf4 | 2075 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
2076 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
2077 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 2078 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 2079 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 2080 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 2081 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 2082 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 2083 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 2084 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 2085 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 2086 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 2087 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 2088 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 2089 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 2090 | if (nodefs || sbi->s_stripe) |
5a916be1 | 2091 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 2092 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
2093 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
2094 | SEQ_OPTS_PUTS("data=journal"); | |
2095 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
2096 | SEQ_OPTS_PUTS("data=ordered"); | |
2097 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
2098 | SEQ_OPTS_PUTS("data=writeback"); | |
2099 | } | |
66acdcf4 TT |
2100 | if (nodefs || |
2101 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
2102 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
2103 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 2104 | |
66acdcf4 TT |
2105 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
2106 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 2107 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
2108 | if (nodefs || sbi->s_max_dir_size_kb) |
2109 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
7915a861 AN |
2110 | if (test_opt(sb, DATA_ERR_ABORT)) |
2111 | SEQ_OPTS_PUTS("data_err=abort"); | |
2adf6da8 TT |
2112 | |
2113 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
2114 | return 0; |
2115 | } | |
2116 | ||
66acdcf4 TT |
2117 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
2118 | { | |
2119 | return _ext4_show_options(seq, root->d_sb, 0); | |
2120 | } | |
2121 | ||
ebd173be | 2122 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
2123 | { |
2124 | struct super_block *sb = seq->private; | |
2125 | int rc; | |
2126 | ||
2127 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
2128 | rc = _ext4_show_options(seq, sb, 1); | |
2129 | seq_puts(seq, "\n"); | |
2130 | return rc; | |
2131 | } | |
2132 | ||
617ba13b | 2133 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
2134 | int read_only) |
2135 | { | |
617ba13b | 2136 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
2137 | int res = 0; |
2138 | ||
617ba13b | 2139 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
2140 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
2141 | "forcing read-only mode"); | |
ac27a0ec DK |
2142 | res = MS_RDONLY; |
2143 | } | |
2144 | if (read_only) | |
281b5995 | 2145 | goto done; |
617ba13b | 2146 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
2147 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
2148 | "running e2fsck is recommended"); | |
c8b459f4 | 2149 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
2150 | ext4_msg(sb, KERN_WARNING, |
2151 | "warning: mounting fs with errors, " | |
2152 | "running e2fsck is recommended"); | |
ed3ce80a | 2153 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
2154 | le16_to_cpu(es->s_mnt_count) >= |
2155 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
2156 | ext4_msg(sb, KERN_WARNING, |
2157 | "warning: maximal mount count reached, " | |
2158 | "running e2fsck is recommended"); | |
ac27a0ec DK |
2159 | else if (le32_to_cpu(es->s_checkinterval) && |
2160 | (le32_to_cpu(es->s_lastcheck) + | |
2161 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
2162 | ext4_msg(sb, KERN_WARNING, |
2163 | "warning: checktime reached, " | |
2164 | "running e2fsck is recommended"); | |
0b8e58a1 | 2165 | if (!sbi->s_journal) |
0390131b | 2166 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 2167 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 2168 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 2169 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 2170 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 2171 | ext4_update_dynamic_rev(sb); |
0390131b | 2172 | if (sbi->s_journal) |
e2b911c5 | 2173 | ext4_set_feature_journal_needs_recovery(sb); |
ac27a0ec | 2174 | |
e2d67052 | 2175 | ext4_commit_super(sb, 1); |
281b5995 | 2176 | done: |
ac27a0ec | 2177 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 2178 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 2179 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
2180 | sb->s_blocksize, |
2181 | sbi->s_groups_count, | |
617ba13b MC |
2182 | EXT4_BLOCKS_PER_GROUP(sb), |
2183 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 2184 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 2185 | |
7abc52c2 | 2186 | cleancache_init_fs(sb); |
ac27a0ec DK |
2187 | return res; |
2188 | } | |
2189 | ||
117fff10 TT |
2190 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
2191 | { | |
2192 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2193 | struct flex_groups *new_groups; | |
2194 | int size; | |
2195 | ||
2196 | if (!sbi->s_log_groups_per_flex) | |
2197 | return 0; | |
2198 | ||
2199 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
2200 | if (size <= sbi->s_flex_groups_allocated) | |
2201 | return 0; | |
2202 | ||
2203 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
a7c3e901 | 2204 | new_groups = kvzalloc(size, GFP_KERNEL); |
117fff10 TT |
2205 | if (!new_groups) { |
2206 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
2207 | size / (int) sizeof(struct flex_groups)); | |
2208 | return -ENOMEM; | |
2209 | } | |
2210 | ||
2211 | if (sbi->s_flex_groups) { | |
2212 | memcpy(new_groups, sbi->s_flex_groups, | |
2213 | (sbi->s_flex_groups_allocated * | |
2214 | sizeof(struct flex_groups))); | |
b93b41d4 | 2215 | kvfree(sbi->s_flex_groups); |
117fff10 TT |
2216 | } |
2217 | sbi->s_flex_groups = new_groups; | |
2218 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
2219 | return 0; | |
2220 | } | |
2221 | ||
772cb7c8 JS |
2222 | static int ext4_fill_flex_info(struct super_block *sb) |
2223 | { | |
2224 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2225 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 2226 | ext4_group_t flex_group; |
117fff10 | 2227 | int i, err; |
772cb7c8 | 2228 | |
503358ae | 2229 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 2230 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
2231 | sbi->s_log_groups_per_flex = 0; |
2232 | return 1; | |
2233 | } | |
2234 | ||
117fff10 TT |
2235 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
2236 | if (err) | |
9933fc0a | 2237 | goto failed; |
772cb7c8 | 2238 | |
772cb7c8 | 2239 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 2240 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
2241 | |
2242 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
2243 | atomic_add(ext4_free_inodes_count(sb, gdp), |
2244 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
2245 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
2246 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
2247 | atomic_add(ext4_used_dirs_count(sb, gdp), |
2248 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
2249 | } |
2250 | ||
2251 | return 1; | |
2252 | failed: | |
2253 | return 0; | |
2254 | } | |
2255 | ||
e2b911c5 | 2256 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 2257 | struct ext4_group_desc *gdp) |
717d50e4 | 2258 | { |
b47820ed | 2259 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
717d50e4 | 2260 | __u16 crc = 0; |
feb0ab32 | 2261 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 2262 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 2263 | |
9aa5d32b | 2264 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 2265 | /* Use new metadata_csum algorithm */ |
feb0ab32 | 2266 | __u32 csum32; |
b47820ed | 2267 | __u16 dummy_csum = 0; |
feb0ab32 | 2268 | |
feb0ab32 DW |
2269 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
2270 | sizeof(le_group)); | |
b47820ed DJ |
2271 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
2272 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, | |
2273 | sizeof(dummy_csum)); | |
2274 | offset += sizeof(dummy_csum); | |
2275 | if (offset < sbi->s_desc_size) | |
2276 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, | |
2277 | sbi->s_desc_size - offset); | |
feb0ab32 DW |
2278 | |
2279 | crc = csum32 & 0xFFFF; | |
2280 | goto out; | |
717d50e4 AD |
2281 | } |
2282 | ||
feb0ab32 | 2283 | /* old crc16 code */ |
e2b911c5 | 2284 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
2285 | return 0; |
2286 | ||
feb0ab32 DW |
2287 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
2288 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2289 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2290 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2291 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 2292 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
2293 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
2294 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2295 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2296 | offset); | |
2297 | ||
2298 | out: | |
717d50e4 AD |
2299 | return cpu_to_le16(crc); |
2300 | } | |
2301 | ||
feb0ab32 | 2302 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2303 | struct ext4_group_desc *gdp) |
2304 | { | |
feb0ab32 | 2305 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 2306 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
2307 | return 0; |
2308 | ||
2309 | return 1; | |
2310 | } | |
2311 | ||
feb0ab32 DW |
2312 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2313 | struct ext4_group_desc *gdp) | |
2314 | { | |
2315 | if (!ext4_has_group_desc_csum(sb)) | |
2316 | return; | |
e2b911c5 | 2317 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
2318 | } |
2319 | ||
ac27a0ec | 2320 | /* Called at mount-time, super-block is locked */ |
bfff6873 | 2321 | static int ext4_check_descriptors(struct super_block *sb, |
829fa70d | 2322 | ext4_fsblk_t sb_block, |
bfff6873 | 2323 | ext4_group_t *first_not_zeroed) |
ac27a0ec | 2324 | { |
617ba13b MC |
2325 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2326 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2327 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2328 | ext4_fsblk_t block_bitmap; |
2329 | ext4_fsblk_t inode_bitmap; | |
2330 | ext4_fsblk_t inode_table; | |
ce421581 | 2331 | int flexbg_flag = 0; |
bfff6873 | 2332 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2333 | |
e2b911c5 | 2334 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
2335 | flexbg_flag = 1; |
2336 | ||
af5bc92d | 2337 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2338 | |
197cd65a AM |
2339 | for (i = 0; i < sbi->s_groups_count; i++) { |
2340 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2341 | ||
ce421581 | 2342 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2343 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2344 | else |
2345 | last_block = first_block + | |
617ba13b | 2346 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2347 | |
bfff6873 LC |
2348 | if ((grp == sbi->s_groups_count) && |
2349 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2350 | grp = i; | |
2351 | ||
8fadc143 | 2352 | block_bitmap = ext4_block_bitmap(sb, gdp); |
829fa70d TT |
2353 | if (block_bitmap == sb_block) { |
2354 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2355 | "Block bitmap for group %u overlaps " | |
2356 | "superblock", i); | |
2357 | } | |
2b2d6d01 | 2358 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2359 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2360 | "Block bitmap for group %u not in group " |
b31e1552 | 2361 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2362 | return 0; |
2363 | } | |
8fadc143 | 2364 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
829fa70d TT |
2365 | if (inode_bitmap == sb_block) { |
2366 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2367 | "Inode bitmap for group %u overlaps " | |
2368 | "superblock", i); | |
2369 | } | |
2b2d6d01 | 2370 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2371 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2372 | "Inode bitmap for group %u not in group " |
b31e1552 | 2373 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2374 | return 0; |
2375 | } | |
8fadc143 | 2376 | inode_table = ext4_inode_table(sb, gdp); |
829fa70d TT |
2377 | if (inode_table == sb_block) { |
2378 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
2379 | "Inode table for group %u overlaps " | |
2380 | "superblock", i); | |
2381 | } | |
bd81d8ee | 2382 | if (inode_table < first_block || |
2b2d6d01 | 2383 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2384 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2385 | "Inode table for group %u not in group " |
b31e1552 | 2386 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2387 | return 0; |
2388 | } | |
955ce5f5 | 2389 | ext4_lock_group(sb, i); |
feb0ab32 | 2390 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2391 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2392 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 2393 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 2394 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
7ee1ec4c | 2395 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2396 | ext4_unlock_group(sb, i); |
8a266467 | 2397 | return 0; |
7ee1ec4c | 2398 | } |
717d50e4 | 2399 | } |
955ce5f5 | 2400 | ext4_unlock_group(sb, i); |
ce421581 JS |
2401 | if (!flexbg_flag) |
2402 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2403 | } |
bfff6873 LC |
2404 | if (NULL != first_not_zeroed) |
2405 | *first_not_zeroed = grp; | |
ac27a0ec DK |
2406 | return 1; |
2407 | } | |
2408 | ||
617ba13b | 2409 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2410 | * the superblock) which were deleted from all directories, but held open by |
2411 | * a process at the time of a crash. We walk the list and try to delete these | |
2412 | * inodes at recovery time (only with a read-write filesystem). | |
2413 | * | |
2414 | * In order to keep the orphan inode chain consistent during traversal (in | |
2415 | * case of crash during recovery), we link each inode into the superblock | |
2416 | * orphan list_head and handle it the same way as an inode deletion during | |
2417 | * normal operation (which journals the operations for us). | |
2418 | * | |
2419 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2420 | * accidentally point at an in-use or already deleted inode. The worst that | |
2421 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2422 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2423 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2424 | * inode cleanup for us, so we can safely abort without any further action. | |
2425 | */ | |
2b2d6d01 TT |
2426 | static void ext4_orphan_cleanup(struct super_block *sb, |
2427 | struct ext4_super_block *es) | |
ac27a0ec DK |
2428 | { |
2429 | unsigned int s_flags = sb->s_flags; | |
2c98eb5e | 2430 | int ret, nr_orphans = 0, nr_truncates = 0; |
ac27a0ec | 2431 | #ifdef CONFIG_QUOTA |
8c6cd47e | 2432 | int quota_update = 0; |
ac27a0ec DK |
2433 | int i; |
2434 | #endif | |
2435 | if (!es->s_last_orphan) { | |
2436 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2437 | return; | |
2438 | } | |
2439 | ||
a8f48a95 | 2440 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2441 | ext4_msg(sb, KERN_ERR, "write access " |
2442 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2443 | return; |
2444 | } | |
2445 | ||
d39195c3 AG |
2446 | /* Check if feature set would not allow a r/w mount */ |
2447 | if (!ext4_feature_set_ok(sb, 0)) { | |
2448 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2449 | "unknown ROCOMPAT features"); | |
2450 | return; | |
2451 | } | |
2452 | ||
617ba13b | 2453 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2454 | /* don't clear list on RO mount w/ errors */ |
2455 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
84474976 | 2456 | ext4_msg(sb, KERN_INFO, "Errors on filesystem, " |
ac27a0ec | 2457 | "clearing orphan list.\n"); |
c25f9bc6 ES |
2458 | es->s_last_orphan = 0; |
2459 | } | |
ac27a0ec DK |
2460 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2461 | return; | |
2462 | } | |
2463 | ||
2464 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2465 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2466 | sb->s_flags &= ~MS_RDONLY; |
2467 | } | |
2468 | #ifdef CONFIG_QUOTA | |
2469 | /* Needed for iput() to work correctly and not trash data */ | |
2470 | sb->s_flags |= MS_ACTIVE; | |
8c6cd47e | 2471 | |
2472 | /* | |
2473 | * Turn on quotas which were not enabled for read-only mounts if | |
2474 | * filesystem has quota feature, so that they are updated correctly. | |
2475 | */ | |
2476 | if (ext4_has_feature_quota(sb) && (s_flags & MS_RDONLY)) { | |
2477 | int ret = ext4_enable_quotas(sb); | |
2478 | ||
2479 | if (!ret) | |
2480 | quota_update = 1; | |
2481 | else | |
2482 | ext4_msg(sb, KERN_ERR, | |
2483 | "Cannot turn on quotas: error %d", ret); | |
2484 | } | |
2485 | ||
2486 | /* Turn on journaled quotas used for old sytle */ | |
a2d4a646 | 2487 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
617ba13b MC |
2488 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2489 | int ret = ext4_quota_on_mount(sb, i); | |
8c6cd47e | 2490 | |
2491 | if (!ret) | |
2492 | quota_update = 1; | |
2493 | else | |
b31e1552 ES |
2494 | ext4_msg(sb, KERN_ERR, |
2495 | "Cannot turn on journaled " | |
8c6cd47e | 2496 | "quota: type %d: error %d", i, ret); |
ac27a0ec DK |
2497 | } |
2498 | } | |
2499 | #endif | |
2500 | ||
2501 | while (es->s_last_orphan) { | |
2502 | struct inode *inode; | |
2503 | ||
c65d5c6c VN |
2504 | /* |
2505 | * We may have encountered an error during cleanup; if | |
2506 | * so, skip the rest. | |
2507 | */ | |
2508 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { | |
2509 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2510 | es->s_last_orphan = 0; | |
2511 | break; | |
2512 | } | |
2513 | ||
97bd42b9 JB |
2514 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2515 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2516 | es->s_last_orphan = 0; |
2517 | break; | |
2518 | } | |
2519 | ||
617ba13b | 2520 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2521 | dquot_initialize(inode); |
ac27a0ec | 2522 | if (inode->i_nlink) { |
566370a2 PT |
2523 | if (test_opt(sb, DEBUG)) |
2524 | ext4_msg(sb, KERN_DEBUG, | |
2525 | "%s: truncating inode %lu to %lld bytes", | |
2526 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2527 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2528 | inode->i_ino, inode->i_size); |
5955102c | 2529 | inode_lock(inode); |
55f252c9 | 2530 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
2c98eb5e TT |
2531 | ret = ext4_truncate(inode); |
2532 | if (ret) | |
2533 | ext4_std_error(inode->i_sb, ret); | |
5955102c | 2534 | inode_unlock(inode); |
ac27a0ec DK |
2535 | nr_truncates++; |
2536 | } else { | |
566370a2 PT |
2537 | if (test_opt(sb, DEBUG)) |
2538 | ext4_msg(sb, KERN_DEBUG, | |
2539 | "%s: deleting unreferenced inode %lu", | |
2540 | __func__, inode->i_ino); | |
ac27a0ec DK |
2541 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2542 | inode->i_ino); | |
2543 | nr_orphans++; | |
2544 | } | |
2545 | iput(inode); /* The delete magic happens here! */ | |
2546 | } | |
2547 | ||
2b2d6d01 | 2548 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2549 | |
2550 | if (nr_orphans) | |
b31e1552 ES |
2551 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2552 | PLURAL(nr_orphans)); | |
ac27a0ec | 2553 | if (nr_truncates) |
b31e1552 ES |
2554 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2555 | PLURAL(nr_truncates)); | |
ac27a0ec | 2556 | #ifdef CONFIG_QUOTA |
8c6cd47e | 2557 | /* Turn off quotas if they were enabled for orphan cleanup */ |
2558 | if (quota_update) { | |
2559 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { | |
2560 | if (sb_dqopt(sb)->files[i]) | |
2561 | dquot_quota_off(sb, i); | |
2562 | } | |
ac27a0ec DK |
2563 | } |
2564 | #endif | |
2565 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2566 | } | |
0b8e58a1 | 2567 | |
cd2291a4 ES |
2568 | /* |
2569 | * Maximal extent format file size. | |
2570 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2571 | * extent format containers, within a sector_t, and within i_blocks | |
2572 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2573 | * so that won't be a limiting factor. | |
2574 | * | |
f17722f9 LC |
2575 | * However there is other limiting factor. We do store extents in the form |
2576 | * of starting block and length, hence the resulting length of the extent | |
2577 | * covering maximum file size must fit into on-disk format containers as | |
2578 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2579 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2580 | * | |
cd2291a4 ES |
2581 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2582 | */ | |
f287a1a5 | 2583 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2584 | { |
2585 | loff_t res; | |
2586 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2587 | ||
2588 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2589 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2590 | /* |
90c699a9 | 2591 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2592 | * i_block represent total blocks in 512 bytes |
2593 | * 32 == size of vfs inode i_blocks * 8 | |
2594 | */ | |
2595 | upper_limit = (1LL << 32) - 1; | |
2596 | ||
2597 | /* total blocks in file system block size */ | |
2598 | upper_limit >>= (blkbits - 9); | |
2599 | upper_limit <<= blkbits; | |
2600 | } | |
2601 | ||
f17722f9 LC |
2602 | /* |
2603 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2604 | * by one fs block, so ee_len can cover the extent of maximum file | |
2605 | * size | |
2606 | */ | |
2607 | res = (1LL << 32) - 1; | |
cd2291a4 | 2608 | res <<= blkbits; |
cd2291a4 ES |
2609 | |
2610 | /* Sanity check against vm- & vfs- imposed limits */ | |
2611 | if (res > upper_limit) | |
2612 | res = upper_limit; | |
2613 | ||
2614 | return res; | |
2615 | } | |
ac27a0ec | 2616 | |
ac27a0ec | 2617 | /* |
cd2291a4 | 2618 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2619 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2620 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2621 | */ |
f287a1a5 | 2622 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2623 | { |
617ba13b | 2624 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2625 | int meta_blocks; |
2626 | loff_t upper_limit; | |
0b8e58a1 AD |
2627 | /* This is calculated to be the largest file size for a dense, block |
2628 | * mapped file such that the file's total number of 512-byte sectors, | |
2629 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2630 | * | |
2631 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2632 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2633 | */ |
2634 | ||
f287a1a5 | 2635 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2636 | /* |
90c699a9 | 2637 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2638 | * the inode i_block field represents total file blocks in |
2639 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2640 | */ |
2641 | upper_limit = (1LL << 32) - 1; | |
2642 | ||
2643 | /* total blocks in file system block size */ | |
2644 | upper_limit >>= (bits - 9); | |
2645 | ||
2646 | } else { | |
8180a562 AK |
2647 | /* |
2648 | * We use 48 bit ext4_inode i_blocks | |
2649 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2650 | * represent total number of blocks in | |
2651 | * file system block size | |
2652 | */ | |
0fc1b451 AK |
2653 | upper_limit = (1LL << 48) - 1; |
2654 | ||
0fc1b451 AK |
2655 | } |
2656 | ||
2657 | /* indirect blocks */ | |
2658 | meta_blocks = 1; | |
2659 | /* double indirect blocks */ | |
2660 | meta_blocks += 1 + (1LL << (bits-2)); | |
2661 | /* tripple indirect blocks */ | |
2662 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2663 | ||
2664 | upper_limit -= meta_blocks; | |
2665 | upper_limit <<= bits; | |
ac27a0ec DK |
2666 | |
2667 | res += 1LL << (bits-2); | |
2668 | res += 1LL << (2*(bits-2)); | |
2669 | res += 1LL << (3*(bits-2)); | |
2670 | res <<= bits; | |
2671 | if (res > upper_limit) | |
2672 | res = upper_limit; | |
0fc1b451 AK |
2673 | |
2674 | if (res > MAX_LFS_FILESIZE) | |
2675 | res = MAX_LFS_FILESIZE; | |
2676 | ||
ac27a0ec DK |
2677 | return res; |
2678 | } | |
2679 | ||
617ba13b | 2680 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2681 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2682 | { |
617ba13b | 2683 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2684 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2685 | int has_super = 0; |
2686 | ||
2687 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2688 | ||
e2b911c5 | 2689 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 2690 | return logical_sb_block + nr + 1; |
ac27a0ec | 2691 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2692 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2693 | has_super = 1; |
0b8e58a1 | 2694 | |
bd63f6b0 DW |
2695 | /* |
2696 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
2697 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
2698 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
2699 | * compensate. | |
2700 | */ | |
2701 | if (sb->s_blocksize == 1024 && nr == 0 && | |
2702 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) | |
2703 | has_super++; | |
2704 | ||
617ba13b | 2705 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2706 | } |
2707 | ||
c9de560d AT |
2708 | /** |
2709 | * ext4_get_stripe_size: Get the stripe size. | |
2710 | * @sbi: In memory super block info | |
2711 | * | |
2712 | * If we have specified it via mount option, then | |
2713 | * use the mount option value. If the value specified at mount time is | |
2714 | * greater than the blocks per group use the super block value. | |
2715 | * If the super block value is greater than blocks per group return 0. | |
2716 | * Allocator needs it be less than blocks per group. | |
2717 | * | |
2718 | */ | |
2719 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2720 | { | |
2721 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2722 | unsigned long stripe_width = | |
2723 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2724 | int ret; |
c9de560d AT |
2725 | |
2726 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 | 2727 | ret = sbi->s_stripe; |
5469d7c3 | 2728 | else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) |
3eb08658 | 2729 | ret = stripe_width; |
5469d7c3 | 2730 | else if (stride && stride <= sbi->s_blocks_per_group) |
3eb08658 DE |
2731 | ret = stride; |
2732 | else | |
2733 | ret = 0; | |
c9de560d | 2734 | |
3eb08658 DE |
2735 | /* |
2736 | * If the stripe width is 1, this makes no sense and | |
2737 | * we set it to 0 to turn off stripe handling code. | |
2738 | */ | |
2739 | if (ret <= 1) | |
2740 | ret = 0; | |
c9de560d | 2741 | |
3eb08658 | 2742 | return ret; |
c9de560d | 2743 | } |
ac27a0ec | 2744 | |
a13fb1a4 ES |
2745 | /* |
2746 | * Check whether this filesystem can be mounted based on | |
2747 | * the features present and the RDONLY/RDWR mount requested. | |
2748 | * Returns 1 if this filesystem can be mounted as requested, | |
2749 | * 0 if it cannot be. | |
2750 | */ | |
2751 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2752 | { | |
e2b911c5 | 2753 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
2754 | ext4_msg(sb, KERN_ERR, |
2755 | "Couldn't mount because of " | |
2756 | "unsupported optional features (%x)", | |
2757 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2758 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2759 | return 0; | |
2760 | } | |
2761 | ||
2762 | if (readonly) | |
2763 | return 1; | |
2764 | ||
e2b911c5 | 2765 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b DW |
2766 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
2767 | sb->s_flags |= MS_RDONLY; | |
2768 | return 1; | |
2769 | } | |
2770 | ||
a13fb1a4 | 2771 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 2772 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
2773 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
2774 | "unsupported optional features (%x)", | |
2775 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2776 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2777 | return 0; | |
2778 | } | |
2779 | /* | |
2780 | * Large file size enabled file system can only be mounted | |
2781 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2782 | */ | |
e2b911c5 | 2783 | if (ext4_has_feature_huge_file(sb)) { |
a13fb1a4 ES |
2784 | if (sizeof(blkcnt_t) < sizeof(u64)) { |
2785 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2786 | "cannot be mounted RDWR without " | |
2787 | "CONFIG_LBDAF"); | |
2788 | return 0; | |
2789 | } | |
2790 | } | |
e2b911c5 | 2791 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
2792 | ext4_msg(sb, KERN_ERR, |
2793 | "Can't support bigalloc feature without " | |
2794 | "extents feature\n"); | |
2795 | return 0; | |
2796 | } | |
7c319d32 AK |
2797 | |
2798 | #ifndef CONFIG_QUOTA | |
e2b911c5 | 2799 | if (ext4_has_feature_quota(sb) && !readonly) { |
7c319d32 AK |
2800 | ext4_msg(sb, KERN_ERR, |
2801 | "Filesystem with quota feature cannot be mounted RDWR " | |
2802 | "without CONFIG_QUOTA"); | |
2803 | return 0; | |
2804 | } | |
689c958c LX |
2805 | if (ext4_has_feature_project(sb) && !readonly) { |
2806 | ext4_msg(sb, KERN_ERR, | |
2807 | "Filesystem with project quota feature cannot be mounted RDWR " | |
2808 | "without CONFIG_QUOTA"); | |
2809 | return 0; | |
2810 | } | |
7c319d32 | 2811 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
2812 | return 1; |
2813 | } | |
2814 | ||
66e61a9e TT |
2815 | /* |
2816 | * This function is called once a day if we have errors logged | |
2817 | * on the file system | |
2818 | */ | |
2819 | static void print_daily_error_info(unsigned long arg) | |
2820 | { | |
2821 | struct super_block *sb = (struct super_block *) arg; | |
2822 | struct ext4_sb_info *sbi; | |
2823 | struct ext4_super_block *es; | |
2824 | ||
2825 | sbi = EXT4_SB(sb); | |
2826 | es = sbi->s_es; | |
2827 | ||
2828 | if (es->s_error_count) | |
ae0f78de TT |
2829 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
2830 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
2831 | le32_to_cpu(es->s_error_count)); |
2832 | if (es->s_first_error_time) { | |
ae0f78de | 2833 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", |
66e61a9e TT |
2834 | sb->s_id, le32_to_cpu(es->s_first_error_time), |
2835 | (int) sizeof(es->s_first_error_func), | |
2836 | es->s_first_error_func, | |
2837 | le32_to_cpu(es->s_first_error_line)); | |
2838 | if (es->s_first_error_ino) | |
651e1c3b | 2839 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
2840 | le32_to_cpu(es->s_first_error_ino)); |
2841 | if (es->s_first_error_block) | |
651e1c3b | 2842 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 2843 | le64_to_cpu(es->s_first_error_block)); |
651e1c3b | 2844 | printk(KERN_CONT "\n"); |
66e61a9e TT |
2845 | } |
2846 | if (es->s_last_error_time) { | |
ae0f78de | 2847 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", |
66e61a9e TT |
2848 | sb->s_id, le32_to_cpu(es->s_last_error_time), |
2849 | (int) sizeof(es->s_last_error_func), | |
2850 | es->s_last_error_func, | |
2851 | le32_to_cpu(es->s_last_error_line)); | |
2852 | if (es->s_last_error_ino) | |
651e1c3b | 2853 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
2854 | le32_to_cpu(es->s_last_error_ino)); |
2855 | if (es->s_last_error_block) | |
651e1c3b | 2856 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 2857 | le64_to_cpu(es->s_last_error_block)); |
651e1c3b | 2858 | printk(KERN_CONT "\n"); |
66e61a9e TT |
2859 | } |
2860 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2861 | } | |
2862 | ||
bfff6873 LC |
2863 | /* Find next suitable group and run ext4_init_inode_table */ |
2864 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2865 | { | |
2866 | struct ext4_group_desc *gdp = NULL; | |
2867 | ext4_group_t group, ngroups; | |
2868 | struct super_block *sb; | |
2869 | unsigned long timeout = 0; | |
2870 | int ret = 0; | |
2871 | ||
2872 | sb = elr->lr_super; | |
2873 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2874 | ||
2875 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2876 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2877 | if (!gdp) { | |
2878 | ret = 1; | |
2879 | break; | |
2880 | } | |
2881 | ||
2882 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2883 | break; | |
2884 | } | |
2885 | ||
7f511862 | 2886 | if (group >= ngroups) |
bfff6873 LC |
2887 | ret = 1; |
2888 | ||
2889 | if (!ret) { | |
2890 | timeout = jiffies; | |
2891 | ret = ext4_init_inode_table(sb, group, | |
2892 | elr->lr_timeout ? 0 : 1); | |
2893 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2894 | timeout = (jiffies - timeout) * |
2895 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2896 | elr->lr_timeout = timeout; |
2897 | } | |
2898 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2899 | elr->lr_next_group = group + 1; | |
2900 | } | |
bfff6873 LC |
2901 | return ret; |
2902 | } | |
2903 | ||
2904 | /* | |
2905 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2906 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2907 | */ |
2908 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2909 | { | |
2910 | struct ext4_sb_info *sbi; | |
2911 | ||
2912 | if (!elr) | |
2913 | return; | |
2914 | ||
2915 | sbi = elr->lr_sbi; | |
2916 | ||
2917 | list_del(&elr->lr_request); | |
2918 | sbi->s_li_request = NULL; | |
2919 | kfree(elr); | |
2920 | } | |
2921 | ||
2922 | static void ext4_unregister_li_request(struct super_block *sb) | |
2923 | { | |
1bb933fb LC |
2924 | mutex_lock(&ext4_li_mtx); |
2925 | if (!ext4_li_info) { | |
2926 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2927 | return; |
1bb933fb | 2928 | } |
bfff6873 LC |
2929 | |
2930 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2931 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2932 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2933 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2934 | } |
2935 | ||
8f1f7453 ES |
2936 | static struct task_struct *ext4_lazyinit_task; |
2937 | ||
bfff6873 LC |
2938 | /* |
2939 | * This is the function where ext4lazyinit thread lives. It walks | |
2940 | * through the request list searching for next scheduled filesystem. | |
2941 | * When such a fs is found, run the lazy initialization request | |
2942 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2943 | * function. Based on that time we compute next schedule time of | |
2944 | * the request. When walking through the list is complete, compute | |
2945 | * next waking time and put itself into sleep. | |
2946 | */ | |
2947 | static int ext4_lazyinit_thread(void *arg) | |
2948 | { | |
2949 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2950 | struct list_head *pos, *n; | |
2951 | struct ext4_li_request *elr; | |
4ed5c033 | 2952 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2953 | |
2954 | BUG_ON(NULL == eli); | |
2955 | ||
bfff6873 LC |
2956 | cont_thread: |
2957 | while (true) { | |
2958 | next_wakeup = MAX_JIFFY_OFFSET; | |
2959 | ||
2960 | mutex_lock(&eli->li_list_mtx); | |
2961 | if (list_empty(&eli->li_request_list)) { | |
2962 | mutex_unlock(&eli->li_list_mtx); | |
2963 | goto exit_thread; | |
2964 | } | |
bfff6873 | 2965 | list_for_each_safe(pos, n, &eli->li_request_list) { |
e22834f0 DM |
2966 | int err = 0; |
2967 | int progress = 0; | |
bfff6873 LC |
2968 | elr = list_entry(pos, struct ext4_li_request, |
2969 | lr_request); | |
2970 | ||
e22834f0 DM |
2971 | if (time_before(jiffies, elr->lr_next_sched)) { |
2972 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2973 | next_wakeup = elr->lr_next_sched; | |
2974 | continue; | |
2975 | } | |
2976 | if (down_read_trylock(&elr->lr_super->s_umount)) { | |
2977 | if (sb_start_write_trylock(elr->lr_super)) { | |
2978 | progress = 1; | |
2979 | /* | |
2980 | * We hold sb->s_umount, sb can not | |
2981 | * be removed from the list, it is | |
2982 | * now safe to drop li_list_mtx | |
2983 | */ | |
2984 | mutex_unlock(&eli->li_list_mtx); | |
2985 | err = ext4_run_li_request(elr); | |
2986 | sb_end_write(elr->lr_super); | |
2987 | mutex_lock(&eli->li_list_mtx); | |
2988 | n = pos->next; | |
b2c78cd0 | 2989 | } |
e22834f0 DM |
2990 | up_read((&elr->lr_super->s_umount)); |
2991 | } | |
2992 | /* error, remove the lazy_init job */ | |
2993 | if (err) { | |
2994 | ext4_remove_li_request(elr); | |
2995 | continue; | |
2996 | } | |
2997 | if (!progress) { | |
2998 | elr->lr_next_sched = jiffies + | |
2999 | (prandom_u32() | |
3000 | % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 | 3001 | } |
bfff6873 LC |
3002 | if (time_before(elr->lr_next_sched, next_wakeup)) |
3003 | next_wakeup = elr->lr_next_sched; | |
3004 | } | |
3005 | mutex_unlock(&eli->li_list_mtx); | |
3006 | ||
a0acae0e | 3007 | try_to_freeze(); |
bfff6873 | 3008 | |
4ed5c033 LC |
3009 | cur = jiffies; |
3010 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 3011 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
3012 | cond_resched(); |
3013 | continue; | |
3014 | } | |
3015 | ||
4ed5c033 LC |
3016 | schedule_timeout_interruptible(next_wakeup - cur); |
3017 | ||
8f1f7453 ES |
3018 | if (kthread_should_stop()) { |
3019 | ext4_clear_request_list(); | |
3020 | goto exit_thread; | |
3021 | } | |
bfff6873 LC |
3022 | } |
3023 | ||
3024 | exit_thread: | |
3025 | /* | |
3026 | * It looks like the request list is empty, but we need | |
3027 | * to check it under the li_list_mtx lock, to prevent any | |
3028 | * additions into it, and of course we should lock ext4_li_mtx | |
3029 | * to atomically free the list and ext4_li_info, because at | |
3030 | * this point another ext4 filesystem could be registering | |
3031 | * new one. | |
3032 | */ | |
3033 | mutex_lock(&ext4_li_mtx); | |
3034 | mutex_lock(&eli->li_list_mtx); | |
3035 | if (!list_empty(&eli->li_request_list)) { | |
3036 | mutex_unlock(&eli->li_list_mtx); | |
3037 | mutex_unlock(&ext4_li_mtx); | |
3038 | goto cont_thread; | |
3039 | } | |
3040 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
3041 | kfree(ext4_li_info); |
3042 | ext4_li_info = NULL; | |
3043 | mutex_unlock(&ext4_li_mtx); | |
3044 | ||
3045 | return 0; | |
3046 | } | |
3047 | ||
3048 | static void ext4_clear_request_list(void) | |
3049 | { | |
3050 | struct list_head *pos, *n; | |
3051 | struct ext4_li_request *elr; | |
3052 | ||
3053 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
3054 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
3055 | elr = list_entry(pos, struct ext4_li_request, | |
3056 | lr_request); | |
3057 | ext4_remove_li_request(elr); | |
3058 | } | |
3059 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3060 | } | |
3061 | ||
3062 | static int ext4_run_lazyinit_thread(void) | |
3063 | { | |
8f1f7453 ES |
3064 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
3065 | ext4_li_info, "ext4lazyinit"); | |
3066 | if (IS_ERR(ext4_lazyinit_task)) { | |
3067 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 3068 | ext4_clear_request_list(); |
bfff6873 LC |
3069 | kfree(ext4_li_info); |
3070 | ext4_li_info = NULL; | |
92b97816 | 3071 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
3072 | "initialization thread\n", |
3073 | err); | |
3074 | return err; | |
3075 | } | |
3076 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
3077 | return 0; |
3078 | } | |
3079 | ||
3080 | /* | |
3081 | * Check whether it make sense to run itable init. thread or not. | |
3082 | * If there is at least one uninitialized inode table, return | |
3083 | * corresponding group number, else the loop goes through all | |
3084 | * groups and return total number of groups. | |
3085 | */ | |
3086 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
3087 | { | |
3088 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
3089 | struct ext4_group_desc *gdp = NULL; | |
3090 | ||
3091 | for (group = 0; group < ngroups; group++) { | |
3092 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3093 | if (!gdp) | |
3094 | continue; | |
3095 | ||
3096 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3097 | break; | |
3098 | } | |
3099 | ||
3100 | return group; | |
3101 | } | |
3102 | ||
3103 | static int ext4_li_info_new(void) | |
3104 | { | |
3105 | struct ext4_lazy_init *eli = NULL; | |
3106 | ||
3107 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3108 | if (!eli) | |
3109 | return -ENOMEM; | |
3110 | ||
bfff6873 LC |
3111 | INIT_LIST_HEAD(&eli->li_request_list); |
3112 | mutex_init(&eli->li_list_mtx); | |
3113 | ||
bfff6873 LC |
3114 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3115 | ||
3116 | ext4_li_info = eli; | |
3117 | ||
3118 | return 0; | |
3119 | } | |
3120 | ||
3121 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3122 | ext4_group_t start) | |
3123 | { | |
3124 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3125 | struct ext4_li_request *elr; | |
bfff6873 LC |
3126 | |
3127 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3128 | if (!elr) | |
3129 | return NULL; | |
3130 | ||
3131 | elr->lr_super = sb; | |
3132 | elr->lr_sbi = sbi; | |
3133 | elr->lr_next_group = start; | |
3134 | ||
3135 | /* | |
3136 | * Randomize first schedule time of the request to | |
3137 | * spread the inode table initialization requests | |
3138 | * better. | |
3139 | */ | |
dd1f723b TT |
3140 | elr->lr_next_sched = jiffies + (prandom_u32() % |
3141 | (EXT4_DEF_LI_MAX_START_DELAY * HZ)); | |
bfff6873 LC |
3142 | return elr; |
3143 | } | |
3144 | ||
7f511862 TT |
3145 | int ext4_register_li_request(struct super_block *sb, |
3146 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3147 | { |
3148 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3149 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3150 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3151 | int ret = 0; |
bfff6873 | 3152 | |
7f511862 | 3153 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3154 | if (sbi->s_li_request != NULL) { |
3155 | /* | |
3156 | * Reset timeout so it can be computed again, because | |
3157 | * s_li_wait_mult might have changed. | |
3158 | */ | |
3159 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3160 | goto out; |
51ce6511 | 3161 | } |
bfff6873 LC |
3162 | |
3163 | if (first_not_zeroed == ngroups || | |
3164 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3165 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3166 | goto out; |
bfff6873 LC |
3167 | |
3168 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3169 | if (!elr) { |
3170 | ret = -ENOMEM; | |
3171 | goto out; | |
3172 | } | |
bfff6873 LC |
3173 | |
3174 | if (NULL == ext4_li_info) { | |
3175 | ret = ext4_li_info_new(); | |
3176 | if (ret) | |
3177 | goto out; | |
3178 | } | |
3179 | ||
3180 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3181 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3182 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3183 | ||
3184 | sbi->s_li_request = elr; | |
46e4690b TM |
3185 | /* |
3186 | * set elr to NULL here since it has been inserted to | |
3187 | * the request_list and the removal and free of it is | |
3188 | * handled by ext4_clear_request_list from now on. | |
3189 | */ | |
3190 | elr = NULL; | |
bfff6873 LC |
3191 | |
3192 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3193 | ret = ext4_run_lazyinit_thread(); | |
3194 | if (ret) | |
3195 | goto out; | |
3196 | } | |
bfff6873 | 3197 | out: |
beed5ecb NK |
3198 | mutex_unlock(&ext4_li_mtx); |
3199 | if (ret) | |
bfff6873 | 3200 | kfree(elr); |
bfff6873 LC |
3201 | return ret; |
3202 | } | |
3203 | ||
3204 | /* | |
3205 | * We do not need to lock anything since this is called on | |
3206 | * module unload. | |
3207 | */ | |
3208 | static void ext4_destroy_lazyinit_thread(void) | |
3209 | { | |
3210 | /* | |
3211 | * If thread exited earlier | |
3212 | * there's nothing to be done. | |
3213 | */ | |
8f1f7453 | 3214 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3215 | return; |
3216 | ||
8f1f7453 | 3217 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3218 | } |
3219 | ||
25ed6e8a DW |
3220 | static int set_journal_csum_feature_set(struct super_block *sb) |
3221 | { | |
3222 | int ret = 1; | |
3223 | int compat, incompat; | |
3224 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3225 | ||
9aa5d32b | 3226 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 3227 | /* journal checksum v3 */ |
25ed6e8a | 3228 | compat = 0; |
db9ee220 | 3229 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
3230 | } else { |
3231 | /* journal checksum v1 */ | |
3232 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3233 | incompat = 0; | |
3234 | } | |
3235 | ||
feb8c6d3 DW |
3236 | jbd2_journal_clear_features(sbi->s_journal, |
3237 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3238 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
3239 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
3240 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3241 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3242 | compat, 0, | |
3243 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3244 | incompat); | |
3245 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3246 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3247 | compat, 0, | |
3248 | incompat); | |
3249 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3250 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3251 | } else { | |
feb8c6d3 DW |
3252 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3253 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
3254 | } |
3255 | ||
3256 | return ret; | |
3257 | } | |
3258 | ||
952fc18e TT |
3259 | /* |
3260 | * Note: calculating the overhead so we can be compatible with | |
3261 | * historical BSD practice is quite difficult in the face of | |
3262 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3263 | * different block group can end up in the same allocation cluster. | |
3264 | * Calculating the exact overhead in the face of clustered allocation | |
3265 | * requires either O(all block bitmaps) in memory or O(number of block | |
3266 | * groups**2) in time. We will still calculate the superblock for | |
3267 | * older file systems --- and if we come across with a bigalloc file | |
3268 | * system with zero in s_overhead_clusters the estimate will be close to | |
3269 | * correct especially for very large cluster sizes --- but for newer | |
3270 | * file systems, it's better to calculate this figure once at mkfs | |
3271 | * time, and store it in the superblock. If the superblock value is | |
3272 | * present (even for non-bigalloc file systems), we will use it. | |
3273 | */ | |
3274 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3275 | char *buf) | |
3276 | { | |
3277 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3278 | struct ext4_group_desc *gdp; | |
3279 | ext4_fsblk_t first_block, last_block, b; | |
3280 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3281 | int s, j, count = 0; | |
3282 | ||
e2b911c5 | 3283 | if (!ext4_has_feature_bigalloc(sb)) |
0548bbb8 TT |
3284 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + |
3285 | sbi->s_itb_per_group + 2); | |
3286 | ||
952fc18e TT |
3287 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3288 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3289 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3290 | for (i = 0; i < ngroups; i++) { | |
3291 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3292 | b = ext4_block_bitmap(sb, gdp); | |
3293 | if (b >= first_block && b <= last_block) { | |
3294 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3295 | count++; | |
3296 | } | |
3297 | b = ext4_inode_bitmap(sb, gdp); | |
3298 | if (b >= first_block && b <= last_block) { | |
3299 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3300 | count++; | |
3301 | } | |
3302 | b = ext4_inode_table(sb, gdp); | |
3303 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3304 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3305 | int c = EXT4_B2C(sbi, b - first_block); | |
3306 | ext4_set_bit(c, buf); | |
3307 | count++; | |
3308 | } | |
3309 | if (i != grp) | |
3310 | continue; | |
3311 | s = 0; | |
3312 | if (ext4_bg_has_super(sb, grp)) { | |
3313 | ext4_set_bit(s++, buf); | |
3314 | count++; | |
3315 | } | |
c48ae41b TT |
3316 | j = ext4_bg_num_gdb(sb, grp); |
3317 | if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { | |
3318 | ext4_error(sb, "Invalid number of block group " | |
3319 | "descriptor blocks: %d", j); | |
3320 | j = EXT4_BLOCKS_PER_GROUP(sb) - s; | |
952fc18e | 3321 | } |
c48ae41b TT |
3322 | count += j; |
3323 | for (; j > 0; j--) | |
3324 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
952fc18e TT |
3325 | } |
3326 | if (!count) | |
3327 | return 0; | |
3328 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3329 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3330 | } | |
3331 | ||
3332 | /* | |
3333 | * Compute the overhead and stash it in sbi->s_overhead | |
3334 | */ | |
3335 | int ext4_calculate_overhead(struct super_block *sb) | |
3336 | { | |
3337 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3338 | struct ext4_super_block *es = sbi->s_es; | |
3c816ded EW |
3339 | struct inode *j_inode; |
3340 | unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); | |
952fc18e TT |
3341 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
3342 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 3343 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 3344 | |
952fc18e TT |
3345 | if (!buf) |
3346 | return -ENOMEM; | |
3347 | ||
3348 | /* | |
3349 | * Compute the overhead (FS structures). This is constant | |
3350 | * for a given filesystem unless the number of block groups | |
3351 | * changes so we cache the previous value until it does. | |
3352 | */ | |
3353 | ||
3354 | /* | |
3355 | * All of the blocks before first_data_block are overhead | |
3356 | */ | |
3357 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3358 | ||
3359 | /* | |
3360 | * Add the overhead found in each block group | |
3361 | */ | |
3362 | for (i = 0; i < ngroups; i++) { | |
3363 | int blks; | |
3364 | ||
3365 | blks = count_overhead(sb, i, buf); | |
3366 | overhead += blks; | |
3367 | if (blks) | |
3368 | memset(buf, 0, PAGE_SIZE); | |
3369 | cond_resched(); | |
3370 | } | |
3c816ded EW |
3371 | |
3372 | /* | |
3373 | * Add the internal journal blocks whether the journal has been | |
3374 | * loaded or not | |
3375 | */ | |
b003b524 | 3376 | if (sbi->s_journal && !sbi->journal_bdev) |
810da240 | 3377 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
3c816ded EW |
3378 | else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { |
3379 | j_inode = ext4_get_journal_inode(sb, j_inum); | |
3380 | if (j_inode) { | |
3381 | j_blocks = j_inode->i_size >> sb->s_blocksize_bits; | |
3382 | overhead += EXT4_NUM_B2C(sbi, j_blocks); | |
3383 | iput(j_inode); | |
3384 | } else { | |
3385 | ext4_msg(sb, KERN_ERR, "can't get journal size"); | |
3386 | } | |
3387 | } | |
952fc18e TT |
3388 | sbi->s_overhead = overhead; |
3389 | smp_wmb(); | |
3390 | free_page((unsigned long) buf); | |
3391 | return 0; | |
3392 | } | |
3393 | ||
b5799018 | 3394 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
3395 | { |
3396 | ext4_fsblk_t resv_clusters; | |
b5799018 | 3397 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 3398 | |
30fac0f7 JK |
3399 | /* |
3400 | * There's no need to reserve anything when we aren't using extents. | |
3401 | * The space estimates are exact, there are no unwritten extents, | |
3402 | * hole punching doesn't need new metadata... This is needed especially | |
3403 | * to keep ext2/3 backward compatibility. | |
3404 | */ | |
e2b911c5 | 3405 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 3406 | return; |
27dd4385 LC |
3407 | /* |
3408 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3409 | * This should cover the situations where we can not afford to run | |
3410 | * out of space like for example punch hole, or converting | |
556615dc | 3411 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
3412 | * allocation would require 1, or 2 blocks, higher numbers are |
3413 | * very rare. | |
3414 | */ | |
b5799018 TT |
3415 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
3416 | sbi->s_cluster_bits); | |
27dd4385 LC |
3417 | |
3418 | do_div(resv_clusters, 50); | |
3419 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3420 | ||
b5799018 | 3421 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
3422 | } |
3423 | ||
2b2d6d01 | 3424 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3425 | { |
d4c402d9 | 3426 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3427 | struct buffer_head *bh; |
617ba13b | 3428 | struct ext4_super_block *es = NULL; |
5aee0f8a | 3429 | struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
617ba13b MC |
3430 | ext4_fsblk_t block; |
3431 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3432 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3433 | unsigned long offset = 0; |
ac27a0ec DK |
3434 | unsigned long journal_devnum = 0; |
3435 | unsigned long def_mount_opts; | |
3436 | struct inode *root; | |
0390131b | 3437 | const char *descr; |
dcc7dae3 | 3438 | int ret = -ENOMEM; |
281b5995 | 3439 | int blocksize, clustersize; |
4ec11028 TT |
3440 | unsigned int db_count; |
3441 | unsigned int i; | |
281b5995 | 3442 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3443 | __u64 blocks_count; |
07aa2ea1 | 3444 | int err = 0; |
b3881f74 | 3445 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3446 | ext4_group_t first_not_zeroed; |
ac27a0ec | 3447 | |
5aee0f8a TT |
3448 | if ((data && !orig_data) || !sbi) |
3449 | goto out_free_base; | |
705895b6 | 3450 | |
40bd02a3 SF |
3451 | if (!userns_mounts && !capable(CAP_SYS_ADMIN)) { |
3452 | ret = -EPERM; | |
3453 | goto out_free_base; | |
3454 | } | |
3455 | ||
705895b6 PE |
3456 | sbi->s_blockgroup_lock = |
3457 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
5aee0f8a TT |
3458 | if (!sbi->s_blockgroup_lock) |
3459 | goto out_free_base; | |
3460 | ||
ac27a0ec | 3461 | sb->s_fs_info = sbi; |
2c0544b2 | 3462 | sbi->s_sb = sb; |
240799cd | 3463 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3464 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3465 | if (sb->s_bdev->bd_part) |
3466 | sbi->s_sectors_written_start = | |
3467 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3468 | |
9f6200bb | 3469 | /* Cleanup superblock name */ |
ec3904dc | 3470 | strreplace(sb->s_id, '/', '!'); |
9f6200bb | 3471 | |
07aa2ea1 | 3472 | /* -EINVAL is default */ |
dcc7dae3 | 3473 | ret = -EINVAL; |
617ba13b | 3474 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3475 | if (!blocksize) { |
b31e1552 | 3476 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3477 | goto out_fail; |
3478 | } | |
3479 | ||
3480 | /* | |
617ba13b | 3481 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3482 | * block sizes. We need to calculate the offset from buffer start. |
3483 | */ | |
617ba13b | 3484 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3485 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3486 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3487 | } else { |
70bbb3e0 | 3488 | logical_sb_block = sb_block; |
ac27a0ec DK |
3489 | } |
3490 | ||
a8ac900b | 3491 | if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { |
b31e1552 | 3492 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3493 | goto out_fail; |
3494 | } | |
3495 | /* | |
3496 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3497 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3498 | */ |
2716b802 | 3499 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3500 | sbi->s_es = es; |
3501 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3502 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3503 | goto cantfind_ext4; | |
afc32f7e | 3504 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3505 | |
feb0ab32 | 3506 | /* Warn if metadata_csum and gdt_csum are both set. */ |
e2b911c5 DW |
3507 | if (ext4_has_feature_metadata_csum(sb) && |
3508 | ext4_has_feature_gdt_csum(sb)) | |
363307e6 | 3509 | ext4_warning(sb, "metadata_csum and uninit_bg are " |
feb0ab32 DW |
3510 | "redundant flags; please run fsck."); |
3511 | ||
d25425f8 DW |
3512 | /* Check for a known checksum algorithm */ |
3513 | if (!ext4_verify_csum_type(sb, es)) { | |
3514 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3515 | "unknown checksum algorithm."); | |
3516 | silent = 1; | |
3517 | goto cantfind_ext4; | |
3518 | } | |
3519 | ||
0441984a | 3520 | /* Load the checksum driver */ |
dec214d0 TE |
3521 | if (ext4_has_feature_metadata_csum(sb) || |
3522 | ext4_has_feature_ea_inode(sb)) { | |
0441984a DW |
3523 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); |
3524 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3525 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3526 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3527 | sbi->s_chksum_driver = NULL; | |
3528 | goto failed_mount; | |
3529 | } | |
3530 | } | |
3531 | ||
a9c47317 DW |
3532 | /* Check superblock checksum */ |
3533 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3534 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3535 | "invalid superblock checksum. Run e2fsck?"); | |
3536 | silent = 1; | |
6a797d27 | 3537 | ret = -EFSBADCRC; |
a9c47317 DW |
3538 | goto cantfind_ext4; |
3539 | } | |
3540 | ||
3541 | /* Precompute checksum seed for all metadata */ | |
e2b911c5 | 3542 | if (ext4_has_feature_csum_seed(sb)) |
8c81bd8f | 3543 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); |
dec214d0 | 3544 | else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) |
a9c47317 DW |
3545 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, |
3546 | sizeof(es->s_uuid)); | |
3547 | ||
ac27a0ec DK |
3548 | /* Set defaults before we parse the mount options */ |
3549 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3550 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3551 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3552 | set_opt(sb, DEBUG); |
87f26807 | 3553 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3554 | set_opt(sb, GRPID); |
617ba13b | 3555 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3556 | set_opt(sb, NO_UID32); |
ea663336 | 3557 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3558 | set_opt(sb, XATTR_USER); |
03010a33 | 3559 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3560 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3561 | #endif |
98c1a759 DW |
3562 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ |
3563 | if (ext4_has_metadata_csum(sb)) | |
3564 | set_opt(sb, JOURNAL_CHECKSUM); | |
3565 | ||
617ba13b | 3566 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3567 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3568 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3569 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3570 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3571 | set_opt(sb, WRITEBACK_DATA); |
617ba13b | 3572 | |
afdbd4a6 SF |
3573 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) { |
3574 | if (!capable(CAP_SYS_ADMIN)) | |
3575 | goto failed_mount; | |
fd8c37ec | 3576 | set_opt(sb, ERRORS_PANIC); |
afdbd4a6 | 3577 | } else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) { |
fd8c37ec | 3578 | set_opt(sb, ERRORS_CONT); |
afdbd4a6 | 3579 | } else { |
fd8c37ec | 3580 | set_opt(sb, ERRORS_RO); |
afdbd4a6 | 3581 | } |
45f1a9c3 DW |
3582 | /* block_validity enabled by default; disable with noblock_validity */ |
3583 | set_opt(sb, BLOCK_VALIDITY); | |
8b67f04a | 3584 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3585 | set_opt(sb, DISCARD); |
ac27a0ec | 3586 | |
afdbd4a6 SF |
3587 | sbi->s_resuid = make_kuid(sb->s_user_ns, le16_to_cpu(es->s_def_resuid)); |
3588 | if (!uid_valid(sbi->s_resuid)) | |
3589 | sbi->s_resuid = make_kuid(sb->s_user_ns, EXT4_DEF_RESUID); | |
3590 | sbi->s_resgid = make_kgid(sb->s_user_ns, le16_to_cpu(es->s_def_resgid)); | |
3591 | if (!gid_valid(sbi->s_resgid)) | |
3592 | sbi->s_resgid = make_kgid(sb->s_user_ns, EXT4_DEF_RESGID); | |
30773840 TT |
3593 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3594 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3595 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3596 | |
8b67f04a | 3597 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3598 | set_opt(sb, BARRIER); |
ac27a0ec | 3599 | |
dd919b98 AK |
3600 | /* |
3601 | * enable delayed allocation by default | |
3602 | * Use -o nodelalloc to turn it off | |
3603 | */ | |
bc0b75f7 | 3604 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3605 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3606 | set_opt(sb, DELALLOC); |
dd919b98 | 3607 | |
51ce6511 LC |
3608 | /* |
3609 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3610 | * no mount option specified. | |
3611 | */ | |
3612 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3613 | ||
5aee0f8a TT |
3614 | if (sbi->s_es->s_mount_opts[0]) { |
3615 | char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, | |
3616 | sizeof(sbi->s_es->s_mount_opts), | |
3617 | GFP_KERNEL); | |
3618 | if (!s_mount_opts) | |
3619 | goto failed_mount; | |
3620 | if (!parse_options(s_mount_opts, sb, &journal_devnum, | |
3621 | &journal_ioprio, 0)) { | |
3622 | ext4_msg(sb, KERN_WARNING, | |
3623 | "failed to parse options in superblock: %s", | |
3624 | s_mount_opts); | |
3625 | } | |
3626 | kfree(s_mount_opts); | |
8b67f04a | 3627 | } |
5a916be1 | 3628 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3629 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3630 | &journal_ioprio, 0)) |
ac27a0ec DK |
3631 | goto failed_mount; |
3632 | ||
56889787 TT |
3633 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3634 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3635 | "with data=journal disables delayed " | |
3636 | "allocation and O_DIRECT support!\n"); | |
3637 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3638 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3639 | "both data=journal and delalloc"); | |
3640 | goto failed_mount; | |
3641 | } | |
3642 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3643 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3644 | "both data=journal and dioread_nolock"); |
56889787 TT |
3645 | goto failed_mount; |
3646 | } | |
923ae0ff RZ |
3647 | if (test_opt(sb, DAX)) { |
3648 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3649 | "both data=journal and dax"); | |
3650 | goto failed_mount; | |
3651 | } | |
73b92a2a SK |
3652 | if (ext4_has_feature_encrypt(sb)) { |
3653 | ext4_msg(sb, KERN_WARNING, | |
3654 | "encrypted files will use data=ordered " | |
3655 | "instead of data journaling mode"); | |
3656 | } | |
56889787 TT |
3657 | if (test_opt(sb, DELALLOC)) |
3658 | clear_opt(sb, DELALLOC); | |
001e4a87 TH |
3659 | } else { |
3660 | sb->s_iflags |= SB_I_CGROUPWB; | |
56889787 TT |
3661 | } |
3662 | ||
ac27a0ec | 3663 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3664 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3665 | |
617ba13b | 3666 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
e2b911c5 DW |
3667 | (ext4_has_compat_features(sb) || |
3668 | ext4_has_ro_compat_features(sb) || | |
3669 | ext4_has_incompat_features(sb))) | |
b31e1552 ES |
3670 | ext4_msg(sb, KERN_WARNING, |
3671 | "feature flags set on rev 0 fs, " | |
3672 | "running e2fsck is recommended"); | |
469108ff | 3673 | |
ed3654eb TT |
3674 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { |
3675 | set_opt2(sb, HURD_COMPAT); | |
e2b911c5 | 3676 | if (ext4_has_feature_64bit(sb)) { |
ed3654eb TT |
3677 | ext4_msg(sb, KERN_ERR, |
3678 | "The Hurd can't support 64-bit file systems"); | |
3679 | goto failed_mount; | |
3680 | } | |
dec214d0 TE |
3681 | |
3682 | /* | |
3683 | * ea_inode feature uses l_i_version field which is not | |
3684 | * available in HURD_COMPAT mode. | |
3685 | */ | |
3686 | if (ext4_has_feature_ea_inode(sb)) { | |
3687 | ext4_msg(sb, KERN_ERR, | |
3688 | "ea_inode feature is not supported for Hurd"); | |
3689 | goto failed_mount; | |
3690 | } | |
ed3654eb TT |
3691 | } |
3692 | ||
2035e776 TT |
3693 | if (IS_EXT2_SB(sb)) { |
3694 | if (ext2_feature_set_ok(sb)) | |
3695 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3696 | "using the ext4 subsystem"); | |
3697 | else { | |
3698 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3699 | "to feature incompatibilities"); | |
3700 | goto failed_mount; | |
3701 | } | |
3702 | } | |
3703 | ||
3704 | if (IS_EXT3_SB(sb)) { | |
3705 | if (ext3_feature_set_ok(sb)) | |
3706 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3707 | "using the ext4 subsystem"); | |
3708 | else { | |
3709 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3710 | "to feature incompatibilities"); | |
3711 | goto failed_mount; | |
3712 | } | |
3713 | } | |
3714 | ||
ac27a0ec DK |
3715 | /* |
3716 | * Check feature flags regardless of the revision level, since we | |
3717 | * previously didn't change the revision level when setting the flags, | |
3718 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3719 | */ | |
a13fb1a4 | 3720 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3721 | goto failed_mount; |
a13fb1a4 | 3722 | |
261cb20c | 3723 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3724 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3725 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 | 3726 | ext4_msg(sb, KERN_ERR, |
8cdf3372 TT |
3727 | "Unsupported filesystem blocksize %d (%d log_block_size)", |
3728 | blocksize, le32_to_cpu(es->s_log_block_size)); | |
3729 | goto failed_mount; | |
3730 | } | |
3731 | if (le32_to_cpu(es->s_log_block_size) > | |
3732 | (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3733 | ext4_msg(sb, KERN_ERR, | |
3734 | "Invalid log block size: %u", | |
3735 | le32_to_cpu(es->s_log_block_size)); | |
ac27a0ec DK |
3736 | goto failed_mount; |
3737 | } | |
3738 | ||
5b9554dc TT |
3739 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { |
3740 | ext4_msg(sb, KERN_ERR, | |
3741 | "Number of reserved GDT blocks insanely large: %d", | |
3742 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); | |
3743 | goto failed_mount; | |
3744 | } | |
3745 | ||
923ae0ff | 3746 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { |
87eefeb4 TK |
3747 | err = bdev_dax_supported(sb, blocksize); |
3748 | if (err) | |
923ae0ff | 3749 | goto failed_mount; |
923ae0ff RZ |
3750 | } |
3751 | ||
e2b911c5 | 3752 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { |
6ddb2447 TT |
3753 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", |
3754 | es->s_encryption_level); | |
3755 | goto failed_mount; | |
3756 | } | |
3757 | ||
ac27a0ec | 3758 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3759 | /* Validate the filesystem blocksize */ |
3760 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3761 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3762 | blocksize); |
ac27a0ec DK |
3763 | goto failed_mount; |
3764 | } | |
3765 | ||
2b2d6d01 | 3766 | brelse(bh); |
70bbb3e0 AM |
3767 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3768 | offset = do_div(logical_sb_block, blocksize); | |
a8ac900b | 3769 | bh = sb_bread_unmovable(sb, logical_sb_block); |
ac27a0ec | 3770 | if (!bh) { |
b31e1552 ES |
3771 | ext4_msg(sb, KERN_ERR, |
3772 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3773 | goto failed_mount; |
3774 | } | |
2716b802 | 3775 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3776 | sbi->s_es = es; |
617ba13b | 3777 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3778 | ext4_msg(sb, KERN_ERR, |
3779 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3780 | goto failed_mount; |
3781 | } | |
3782 | } | |
3783 | ||
e2b911c5 | 3784 | has_huge_files = ext4_has_feature_huge_file(sb); |
f287a1a5 TT |
3785 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3786 | has_huge_files); | |
3787 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3788 | |
617ba13b MC |
3789 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3790 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3791 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3792 | } else { |
3793 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3794 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3795 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3796 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3797 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3798 | ext4_msg(sb, KERN_ERR, |
3799 | "unsupported inode size: %d", | |
2b2d6d01 | 3800 | sbi->s_inode_size); |
ac27a0ec DK |
3801 | goto failed_mount; |
3802 | } | |
ef7f3835 KS |
3803 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3804 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3805 | } |
0b8e58a1 | 3806 | |
0d1ee42f | 3807 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
e2b911c5 | 3808 | if (ext4_has_feature_64bit(sb)) { |
8fadc143 | 3809 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3810 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3811 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3812 | ext4_msg(sb, KERN_ERR, |
3813 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3814 | sbi->s_desc_size); |
3815 | goto failed_mount; | |
3816 | } | |
3817 | } else | |
3818 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3819 | |
ac27a0ec | 3820 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3821 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
0b8e58a1 | 3822 | |
617ba13b | 3823 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3824 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3825 | goto cantfind_ext4; |
cd6bb35b TT |
3826 | if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || |
3827 | sbi->s_inodes_per_group > blocksize * 8) { | |
3828 | ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", | |
3829 | sbi->s_blocks_per_group); | |
3830 | goto failed_mount; | |
3831 | } | |
ac27a0ec DK |
3832 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3833 | sbi->s_inodes_per_block; | |
0d1ee42f | 3834 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3835 | sbi->s_sbh = bh; |
3836 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3837 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3838 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3839 | |
2b2d6d01 | 3840 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3841 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3842 | sbi->s_def_hash_version = es->s_def_hash_version; | |
e2b911c5 | 3843 | if (ext4_has_feature_dir_index(sb)) { |
23301410 TT |
3844 | i = le32_to_cpu(es->s_flags); |
3845 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3846 | sbi->s_hash_unsigned = 3; | |
3847 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
f99b2589 | 3848 | #ifdef __CHAR_UNSIGNED__ |
23301410 TT |
3849 | if (!(sb->s_flags & MS_RDONLY)) |
3850 | es->s_flags |= | |
3851 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3852 | sbi->s_hash_unsigned = 3; | |
f99b2589 | 3853 | #else |
23301410 TT |
3854 | if (!(sb->s_flags & MS_RDONLY)) |
3855 | es->s_flags |= | |
3856 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
f99b2589 | 3857 | #endif |
23301410 | 3858 | } |
f99b2589 | 3859 | } |
ac27a0ec | 3860 | |
281b5995 TT |
3861 | /* Handle clustersize */ |
3862 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
e2b911c5 | 3863 | has_bigalloc = ext4_has_feature_bigalloc(sb); |
281b5995 TT |
3864 | if (has_bigalloc) { |
3865 | if (clustersize < blocksize) { | |
3866 | ext4_msg(sb, KERN_ERR, | |
3867 | "cluster size (%d) smaller than " | |
3868 | "block size (%d)", clustersize, blocksize); | |
3869 | goto failed_mount; | |
3870 | } | |
8cdf3372 TT |
3871 | if (le32_to_cpu(es->s_log_cluster_size) > |
3872 | (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
3873 | ext4_msg(sb, KERN_ERR, | |
3874 | "Invalid log cluster size: %u", | |
3875 | le32_to_cpu(es->s_log_cluster_size)); | |
3876 | goto failed_mount; | |
3877 | } | |
281b5995 TT |
3878 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - |
3879 | le32_to_cpu(es->s_log_block_size); | |
3880 | sbi->s_clusters_per_group = | |
3881 | le32_to_cpu(es->s_clusters_per_group); | |
3882 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3883 | ext4_msg(sb, KERN_ERR, | |
3884 | "#clusters per group too big: %lu", | |
3885 | sbi->s_clusters_per_group); | |
3886 | goto failed_mount; | |
3887 | } | |
3888 | if (sbi->s_blocks_per_group != | |
3889 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3890 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3891 | "clusters per group (%lu) inconsistent", | |
3892 | sbi->s_blocks_per_group, | |
3893 | sbi->s_clusters_per_group); | |
3894 | goto failed_mount; | |
3895 | } | |
3896 | } else { | |
3897 | if (clustersize != blocksize) { | |
3898 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3899 | "block size (%d)", clustersize, | |
3900 | blocksize); | |
3901 | clustersize = blocksize; | |
3902 | } | |
3903 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3904 | ext4_msg(sb, KERN_ERR, | |
3905 | "#blocks per group too big: %lu", | |
3906 | sbi->s_blocks_per_group); | |
3907 | goto failed_mount; | |
3908 | } | |
3909 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3910 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3911 | } |
281b5995 TT |
3912 | sbi->s_cluster_ratio = clustersize / blocksize; |
3913 | ||
960fd856 TT |
3914 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3915 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3916 | set_opt2(sb, STD_GROUP_SIZE); | |
3917 | ||
bf43d84b ES |
3918 | /* |
3919 | * Test whether we have more sectors than will fit in sector_t, | |
3920 | * and whether the max offset is addressable by the page cache. | |
3921 | */ | |
5a9ae68a | 3922 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3923 | ext4_blocks_count(es)); |
5a9ae68a | 3924 | if (err) { |
b31e1552 | 3925 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3926 | " too large to mount safely on this system"); |
ac27a0ec | 3927 | if (sizeof(sector_t) < 8) |
90c699a9 | 3928 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3929 | goto failed_mount; |
3930 | } | |
3931 | ||
617ba13b MC |
3932 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3933 | goto cantfind_ext4; | |
e7c95593 | 3934 | |
0f2ddca6 FTN |
3935 | /* check blocks count against device size */ |
3936 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3937 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3938 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3939 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3940 | ext4_blocks_count(es), blocks_count); |
3941 | goto failed_mount; | |
3942 | } | |
3943 | ||
0b8e58a1 AD |
3944 | /* |
3945 | * It makes no sense for the first data block to be beyond the end | |
3946 | * of the filesystem. | |
3947 | */ | |
3948 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3949 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3950 | "block %u is beyond end of filesystem (%llu)", |
3951 | le32_to_cpu(es->s_first_data_block), | |
3952 | ext4_blocks_count(es)); | |
e7c95593 ES |
3953 | goto failed_mount; |
3954 | } | |
bd81d8ee LV |
3955 | blocks_count = (ext4_blocks_count(es) - |
3956 | le32_to_cpu(es->s_first_data_block) + | |
3957 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3958 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3959 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3960 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3961 | "(block count %llu, first data block %u, " |
b31e1552 | 3962 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3963 | ext4_blocks_count(es), |
3964 | le32_to_cpu(es->s_first_data_block), | |
3965 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3966 | goto failed_mount; | |
3967 | } | |
bd81d8ee | 3968 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3969 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3970 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3971 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3972 | EXT4_DESC_PER_BLOCK(sb); | |
3a4b77cd | 3973 | if (ext4_has_feature_meta_bg(sb)) { |
2ba3e6e8 | 3974 | if (le32_to_cpu(es->s_first_meta_bg) > db_count) { |
3a4b77cd EG |
3975 | ext4_msg(sb, KERN_WARNING, |
3976 | "first meta block group too large: %u " | |
3977 | "(group descriptor block count %u)", | |
3978 | le32_to_cpu(es->s_first_meta_bg), db_count); | |
3979 | goto failed_mount; | |
3980 | } | |
3981 | } | |
a7c3e901 | 3982 | sbi->s_group_desc = kvmalloc(db_count * |
f18a5f21 TT |
3983 | sizeof(struct buffer_head *), |
3984 | GFP_KERNEL); | |
ac27a0ec | 3985 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3986 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3987 | ret = -ENOMEM; |
ac27a0ec DK |
3988 | goto failed_mount; |
3989 | } | |
3990 | ||
705895b6 | 3991 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec | 3992 | |
85c8f176 AP |
3993 | /* Pre-read the descriptors into the buffer cache */ |
3994 | for (i = 0; i < db_count; i++) { | |
3995 | block = descriptor_loc(sb, logical_sb_block, i); | |
3996 | sb_breadahead(sb, block); | |
3997 | } | |
3998 | ||
ac27a0ec | 3999 | for (i = 0; i < db_count; i++) { |
70bbb3e0 | 4000 | block = descriptor_loc(sb, logical_sb_block, i); |
a8ac900b | 4001 | sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); |
ac27a0ec | 4002 | if (!sbi->s_group_desc[i]) { |
b31e1552 ES |
4003 | ext4_msg(sb, KERN_ERR, |
4004 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
4005 | db_count = i; |
4006 | goto failed_mount2; | |
4007 | } | |
4008 | } | |
829fa70d | 4009 | if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { |
b31e1552 | 4010 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
6a797d27 | 4011 | ret = -EFSCORRUPTED; |
f9ae9cf5 | 4012 | goto failed_mount2; |
ac27a0ec | 4013 | } |
772cb7c8 | 4014 | |
f9ae9cf5 | 4015 | sbi->s_gdb_count = db_count; |
ac27a0ec DK |
4016 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
4017 | spin_lock_init(&sbi->s_next_gen_lock); | |
4018 | ||
04ecddb7 JM |
4019 | setup_timer(&sbi->s_err_report, print_daily_error_info, |
4020 | (unsigned long) sb); | |
04496411 | 4021 | |
a75ae78f | 4022 | /* Register extent status tree shrinker */ |
eb68d0e2 | 4023 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 4024 | goto failed_mount3; |
ce7e010a | 4025 | |
c9de560d | 4026 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 4027 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 4028 | |
f9ae9cf5 TT |
4029 | /* |
4030 | * set up enough so that it can read an inode | |
4031 | */ | |
f6e63f90 | 4032 | sb->s_op = &ext4_sops; |
617ba13b MC |
4033 | sb->s_export_op = &ext4_export_ops; |
4034 | sb->s_xattr = ext4_xattr_handlers; | |
a7550b30 | 4035 | sb->s_cop = &ext4_cryptops; |
ac27a0ec | 4036 | #ifdef CONFIG_QUOTA |
617ba13b | 4037 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 4038 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 4039 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
4040 | else |
4041 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 4042 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 4043 | #endif |
85787090 | 4044 | memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
f2fa2ffc | 4045 | |
ac27a0ec | 4046 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 4047 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
4048 | |
4049 | sb->s_root = NULL; | |
4050 | ||
4051 | needs_recovery = (es->s_last_orphan != 0 || | |
e2b911c5 | 4052 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 4053 | |
e2b911c5 | 4054 | if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) |
c5e06d10 | 4055 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 4056 | goto failed_mount3a; |
c5e06d10 | 4057 | |
ac27a0ec DK |
4058 | /* |
4059 | * The first inode we look at is the journal inode. Don't try | |
4060 | * root first: it may be modified in the journal! | |
4061 | */ | |
e2b911c5 | 4062 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
4753d8a2 TT |
4063 | err = ext4_load_journal(sb, es, journal_devnum); |
4064 | if (err) | |
50460fe8 | 4065 | goto failed_mount3a; |
0390131b | 4066 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
e2b911c5 | 4067 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
4068 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
4069 | "suppressed and not mounted read-only"); | |
744692dc | 4070 | goto failed_mount_wq; |
ac27a0ec | 4071 | } else { |
1e381f60 DM |
4072 | /* Nojournal mode, all journal mount options are illegal */ |
4073 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
4074 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4075 | "journal_checksum, fs mounted w/o journal"); | |
4076 | goto failed_mount_wq; | |
4077 | } | |
4078 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4079 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4080 | "journal_async_commit, fs mounted w/o journal"); | |
4081 | goto failed_mount_wq; | |
4082 | } | |
4083 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
4084 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4085 | "commit=%lu, fs mounted w/o journal", | |
4086 | sbi->s_commit_interval / HZ); | |
4087 | goto failed_mount_wq; | |
4088 | } | |
4089 | if (EXT4_MOUNT_DATA_FLAGS & | |
4090 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
4091 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4092 | "data=, fs mounted w/o journal"); | |
4093 | goto failed_mount_wq; | |
4094 | } | |
4095 | sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
4096 | clear_opt(sb, JOURNAL_CHECKSUM); | |
fd8c37ec | 4097 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
4098 | sbi->s_journal = NULL; |
4099 | needs_recovery = 0; | |
4100 | goto no_journal; | |
ac27a0ec DK |
4101 | } |
4102 | ||
e2b911c5 | 4103 | if (ext4_has_feature_64bit(sb) && |
eb40a09c JS |
4104 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
4105 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 4106 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 4107 | goto failed_mount_wq; |
eb40a09c JS |
4108 | } |
4109 | ||
25ed6e8a DW |
4110 | if (!set_journal_csum_feature_set(sb)) { |
4111 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
4112 | "feature set"); | |
4113 | goto failed_mount_wq; | |
d4da6c9c | 4114 | } |
818d276c | 4115 | |
ac27a0ec DK |
4116 | /* We have now updated the journal if required, so we can |
4117 | * validate the data journaling mode. */ | |
4118 | switch (test_opt(sb, DATA_FLAGS)) { | |
4119 | case 0: | |
4120 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
4121 | * capabilities: ORDERED_DATA if the journal can |
4122 | * cope, else JOURNAL_DATA | |
4123 | */ | |
dab291af MC |
4124 | if (jbd2_journal_check_available_features |
4125 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 4126 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 4127 | else |
fd8c37ec | 4128 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
4129 | break; |
4130 | ||
617ba13b MC |
4131 | case EXT4_MOUNT_ORDERED_DATA: |
4132 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
4133 | if (!jbd2_journal_check_available_features |
4134 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
4135 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
4136 | "requested data journaling mode"); | |
744692dc | 4137 | goto failed_mount_wq; |
ac27a0ec DK |
4138 | } |
4139 | default: | |
4140 | break; | |
4141 | } | |
ab04df78 JK |
4142 | |
4143 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && | |
4144 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4145 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4146 | "journal_async_commit in data=ordered mode"); | |
4147 | goto failed_mount_wq; | |
4148 | } | |
4149 | ||
b3881f74 | 4150 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 4151 | |
18aadd47 BJ |
4152 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
4153 | ||
ce7e010a | 4154 | no_journal: |
cdb7ee4c TE |
4155 | if (!test_opt(sb, NO_MBCACHE)) { |
4156 | sbi->s_ea_block_cache = ext4_xattr_create_cache(); | |
4157 | if (!sbi->s_ea_block_cache) { | |
dec214d0 | 4158 | ext4_msg(sb, KERN_ERR, |
cdb7ee4c | 4159 | "Failed to create ea_block_cache"); |
dec214d0 TE |
4160 | goto failed_mount_wq; |
4161 | } | |
cdb7ee4c TE |
4162 | |
4163 | if (ext4_has_feature_ea_inode(sb)) { | |
4164 | sbi->s_ea_inode_cache = ext4_xattr_create_cache(); | |
4165 | if (!sbi->s_ea_inode_cache) { | |
4166 | ext4_msg(sb, KERN_ERR, | |
4167 | "Failed to create ea_inode_cache"); | |
4168 | goto failed_mount_wq; | |
4169 | } | |
4170 | } | |
9c191f70 M |
4171 | } |
4172 | ||
e2b911c5 | 4173 | if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && |
09cbfeaf | 4174 | (blocksize != PAGE_SIZE)) { |
1cb767cd TT |
4175 | ext4_msg(sb, KERN_ERR, |
4176 | "Unsupported blocksize for fs encryption"); | |
4177 | goto failed_mount_wq; | |
4178 | } | |
4179 | ||
e2b911c5 DW |
4180 | if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && |
4181 | !ext4_has_feature_encrypt(sb)) { | |
4182 | ext4_set_feature_encrypt(sb); | |
6ddb2447 TT |
4183 | ext4_commit_super(sb, 1); |
4184 | } | |
4185 | ||
952fc18e TT |
4186 | /* |
4187 | * Get the # of file system overhead blocks from the | |
4188 | * superblock if present. | |
4189 | */ | |
4190 | if (es->s_overhead_clusters) | |
4191 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
4192 | else { | |
07aa2ea1 LC |
4193 | err = ext4_calculate_overhead(sb); |
4194 | if (err) | |
952fc18e TT |
4195 | goto failed_mount_wq; |
4196 | } | |
4197 | ||
fd89d5f2 TH |
4198 | /* |
4199 | * The maximum number of concurrent works can be high and | |
4200 | * concurrency isn't really necessary. Limit it to 1. | |
4201 | */ | |
2e8fa54e JK |
4202 | EXT4_SB(sb)->rsv_conversion_wq = |
4203 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
4204 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
4205 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 4206 | ret = -ENOMEM; |
2e8fa54e JK |
4207 | goto failed_mount4; |
4208 | } | |
4209 | ||
ac27a0ec | 4210 | /* |
dab291af | 4211 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
4212 | * so we can safely mount the rest of the filesystem now. |
4213 | */ | |
4214 | ||
1d1fe1ee DH |
4215 | root = ext4_iget(sb, EXT4_ROOT_INO); |
4216 | if (IS_ERR(root)) { | |
b31e1552 | 4217 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 4218 | ret = PTR_ERR(root); |
32a9bb57 | 4219 | root = NULL; |
ac27a0ec DK |
4220 | goto failed_mount4; |
4221 | } | |
4222 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4223 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4224 | iput(root); |
ac27a0ec DK |
4225 | goto failed_mount4; |
4226 | } | |
48fde701 | 4227 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4228 | if (!sb->s_root) { |
b31e1552 | 4229 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4230 | ret = -ENOMEM; |
4231 | goto failed_mount4; | |
4232 | } | |
ac27a0ec | 4233 | |
7e84b621 ES |
4234 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
4235 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
4236 | |
4237 | /* determine the minimum size of new large inodes, if present */ | |
670e9875 TT |
4238 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && |
4239 | sbi->s_want_extra_isize == 0) { | |
ef7f3835 KS |
4240 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - |
4241 | EXT4_GOOD_OLD_INODE_SIZE; | |
e2b911c5 | 4242 | if (ext4_has_feature_extra_isize(sb)) { |
ef7f3835 KS |
4243 | if (sbi->s_want_extra_isize < |
4244 | le16_to_cpu(es->s_want_extra_isize)) | |
4245 | sbi->s_want_extra_isize = | |
4246 | le16_to_cpu(es->s_want_extra_isize); | |
4247 | if (sbi->s_want_extra_isize < | |
4248 | le16_to_cpu(es->s_min_extra_isize)) | |
4249 | sbi->s_want_extra_isize = | |
4250 | le16_to_cpu(es->s_min_extra_isize); | |
4251 | } | |
4252 | } | |
4253 | /* Check if enough inode space is available */ | |
4254 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
4255 | sbi->s_inode_size) { | |
4256 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4257 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
4258 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
4259 | "available"); | |
ef7f3835 KS |
4260 | } |
4261 | ||
b5799018 | 4262 | ext4_set_resv_clusters(sb); |
27dd4385 | 4263 | |
6fd058f7 TT |
4264 | err = ext4_setup_system_zone(sb); |
4265 | if (err) { | |
b31e1552 | 4266 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4267 | "zone (%d)", err); |
f9ae9cf5 TT |
4268 | goto failed_mount4a; |
4269 | } | |
4270 | ||
4271 | ext4_ext_init(sb); | |
4272 | err = ext4_mb_init(sb); | |
4273 | if (err) { | |
4274 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
4275 | err); | |
dcf2d804 | 4276 | goto failed_mount5; |
c2774d84 AK |
4277 | } |
4278 | ||
d5e03cbb TT |
4279 | block = ext4_count_free_clusters(sb); |
4280 | ext4_free_blocks_count_set(sbi->s_es, | |
4281 | EXT4_C2B(sbi, block)); | |
908c7f19 TH |
4282 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, |
4283 | GFP_KERNEL); | |
d5e03cbb TT |
4284 | if (!err) { |
4285 | unsigned long freei = ext4_count_free_inodes(sb); | |
4286 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
908c7f19 TH |
4287 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, |
4288 | GFP_KERNEL); | |
d5e03cbb TT |
4289 | } |
4290 | if (!err) | |
4291 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
908c7f19 | 4292 | ext4_count_dirs(sb), GFP_KERNEL); |
d5e03cbb | 4293 | if (!err) |
908c7f19 TH |
4294 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, |
4295 | GFP_KERNEL); | |
c8585c6f DJ |
4296 | if (!err) |
4297 | err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); | |
4298 | ||
d5e03cbb TT |
4299 | if (err) { |
4300 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
4301 | goto failed_mount6; | |
4302 | } | |
4303 | ||
e2b911c5 | 4304 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
4305 | if (!ext4_fill_flex_info(sb)) { |
4306 | ext4_msg(sb, KERN_ERR, | |
4307 | "unable to initialize " | |
4308 | "flex_bg meta info!"); | |
4309 | goto failed_mount6; | |
4310 | } | |
4311 | ||
bfff6873 LC |
4312 | err = ext4_register_li_request(sb, first_not_zeroed); |
4313 | if (err) | |
dcf2d804 | 4314 | goto failed_mount6; |
bfff6873 | 4315 | |
b5799018 | 4316 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
4317 | if (err) |
4318 | goto failed_mount7; | |
3197ebdb | 4319 | |
9b2ff357 JK |
4320 | #ifdef CONFIG_QUOTA |
4321 | /* Enable quota usage during mount. */ | |
e2b911c5 | 4322 | if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { |
9b2ff357 JK |
4323 | err = ext4_enable_quotas(sb); |
4324 | if (err) | |
4325 | goto failed_mount8; | |
4326 | } | |
4327 | #endif /* CONFIG_QUOTA */ | |
4328 | ||
617ba13b MC |
4329 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4330 | ext4_orphan_cleanup(sb, es); | |
4331 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4332 | if (needs_recovery) { |
b31e1552 | 4333 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4334 | ext4_mark_recovery_complete(sb, es); |
4335 | } | |
4336 | if (EXT4_SB(sb)->s_journal) { | |
4337 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4338 | descr = " journalled data mode"; | |
4339 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4340 | descr = " ordered data mode"; | |
4341 | else | |
4342 | descr = " writeback data mode"; | |
4343 | } else | |
4344 | descr = "out journal"; | |
4345 | ||
79add3a3 LC |
4346 | if (test_opt(sb, DISCARD)) { |
4347 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4348 | if (!blk_queue_discard(q)) | |
4349 | ext4_msg(sb, KERN_WARNING, | |
4350 | "mounting with \"discard\" option, but " | |
4351 | "the device does not support discard"); | |
4352 | } | |
4353 | ||
e294a537 TT |
4354 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) |
4355 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " | |
5aee0f8a TT |
4356 | "Opts: %.*s%s%s", descr, |
4357 | (int) sizeof(sbi->s_es->s_mount_opts), | |
4358 | sbi->s_es->s_mount_opts, | |
e294a537 | 4359 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); |
ac27a0ec | 4360 | |
66e61a9e TT |
4361 | if (es->s_error_count) |
4362 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4363 | |
efbed4dc TT |
4364 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
4365 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
4366 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
4367 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
4368 | ||
d4c402d9 | 4369 | kfree(orig_data); |
ac27a0ec DK |
4370 | return 0; |
4371 | ||
617ba13b | 4372 | cantfind_ext4: |
ac27a0ec | 4373 | if (!silent) |
b31e1552 | 4374 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4375 | goto failed_mount; |
4376 | ||
72ba7450 TT |
4377 | #ifdef CONFIG_QUOTA |
4378 | failed_mount8: | |
ebd173be | 4379 | ext4_unregister_sysfs(sb); |
72ba7450 | 4380 | #endif |
dcf2d804 TM |
4381 | failed_mount7: |
4382 | ext4_unregister_li_request(sb); | |
4383 | failed_mount6: | |
f9ae9cf5 | 4384 | ext4_mb_release(sb); |
d5e03cbb | 4385 | if (sbi->s_flex_groups) |
b93b41d4 | 4386 | kvfree(sbi->s_flex_groups); |
d5e03cbb TT |
4387 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
4388 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
4389 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
4390 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
00764937 | 4391 | failed_mount5: |
f9ae9cf5 TT |
4392 | ext4_ext_release(sb); |
4393 | ext4_release_system_zone(sb); | |
4394 | failed_mount4a: | |
94bf608a | 4395 | dput(sb->s_root); |
32a9bb57 | 4396 | sb->s_root = NULL; |
94bf608a | 4397 | failed_mount4: |
b31e1552 | 4398 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4399 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4400 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4401 | failed_mount_wq: |
dec214d0 TE |
4402 | if (sbi->s_ea_inode_cache) { |
4403 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); | |
4404 | sbi->s_ea_inode_cache = NULL; | |
4405 | } | |
47387409 TE |
4406 | if (sbi->s_ea_block_cache) { |
4407 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
4408 | sbi->s_ea_block_cache = NULL; | |
82939d79 | 4409 | } |
0390131b FM |
4410 | if (sbi->s_journal) { |
4411 | jbd2_journal_destroy(sbi->s_journal); | |
4412 | sbi->s_journal = NULL; | |
4413 | } | |
50460fe8 | 4414 | failed_mount3a: |
d3922a77 | 4415 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 4416 | failed_mount3: |
9105bb14 | 4417 | del_timer_sync(&sbi->s_err_report); |
c5e06d10 JL |
4418 | if (sbi->s_mmp_tsk) |
4419 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4420 | failed_mount2: |
4421 | for (i = 0; i < db_count; i++) | |
4422 | brelse(sbi->s_group_desc[i]); | |
b93b41d4 | 4423 | kvfree(sbi->s_group_desc); |
ac27a0ec | 4424 | failed_mount: |
0441984a DW |
4425 | if (sbi->s_chksum_driver) |
4426 | crypto_free_shash(sbi->s_chksum_driver); | |
ac27a0ec | 4427 | #ifdef CONFIG_QUOTA |
a2d4a646 | 4428 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
ac27a0ec DK |
4429 | kfree(sbi->s_qf_names[i]); |
4430 | #endif | |
617ba13b | 4431 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4432 | brelse(bh); |
4433 | out_fail: | |
afdbd4a6 | 4434 | /* sb->s_user_ns will be put when sb is destroyed */ |
ac27a0ec | 4435 | sb->s_fs_info = NULL; |
f6830165 | 4436 | kfree(sbi->s_blockgroup_lock); |
5aee0f8a | 4437 | out_free_base: |
ac27a0ec | 4438 | kfree(sbi); |
d4c402d9 | 4439 | kfree(orig_data); |
07aa2ea1 | 4440 | return err ? err : ret; |
ac27a0ec DK |
4441 | } |
4442 | ||
4443 | /* | |
4444 | * Setup any per-fs journal parameters now. We'll do this both on | |
4445 | * initial mount, once the journal has been initialised but before we've | |
4446 | * done any recovery; and again on any subsequent remount. | |
4447 | */ | |
617ba13b | 4448 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4449 | { |
617ba13b | 4450 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4451 | |
30773840 TT |
4452 | journal->j_commit_interval = sbi->s_commit_interval; |
4453 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4454 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4455 | |
a931da6a | 4456 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4457 | if (test_opt(sb, BARRIER)) |
dab291af | 4458 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4459 | else |
dab291af | 4460 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4461 | if (test_opt(sb, DATA_ERR_ABORT)) |
4462 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4463 | else | |
4464 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4465 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4466 | } |
4467 | ||
c6cb7e77 EW |
4468 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
4469 | unsigned int journal_inum) | |
ac27a0ec DK |
4470 | { |
4471 | struct inode *journal_inode; | |
ac27a0ec | 4472 | |
c6cb7e77 EW |
4473 | /* |
4474 | * Test for the existence of a valid inode on disk. Bad things | |
4475 | * happen if we iget() an unused inode, as the subsequent iput() | |
4476 | * will try to delete it. | |
4477 | */ | |
1d1fe1ee DH |
4478 | journal_inode = ext4_iget(sb, journal_inum); |
4479 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4480 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4481 | return NULL; |
4482 | } | |
4483 | if (!journal_inode->i_nlink) { | |
4484 | make_bad_inode(journal_inode); | |
4485 | iput(journal_inode); | |
b31e1552 | 4486 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4487 | return NULL; |
4488 | } | |
4489 | ||
e5f8eab8 | 4490 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4491 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4492 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4493 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4494 | iput(journal_inode); |
4495 | return NULL; | |
4496 | } | |
c6cb7e77 EW |
4497 | return journal_inode; |
4498 | } | |
4499 | ||
4500 | static journal_t *ext4_get_journal(struct super_block *sb, | |
4501 | unsigned int journal_inum) | |
4502 | { | |
4503 | struct inode *journal_inode; | |
4504 | journal_t *journal; | |
4505 | ||
4506 | BUG_ON(!ext4_has_feature_journal(sb)); | |
4507 | ||
4508 | journal_inode = ext4_get_journal_inode(sb, journal_inum); | |
4509 | if (!journal_inode) | |
4510 | return NULL; | |
ac27a0ec | 4511 | |
dab291af | 4512 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4513 | if (!journal) { |
b31e1552 | 4514 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4515 | iput(journal_inode); |
4516 | return NULL; | |
4517 | } | |
4518 | journal->j_private = sb; | |
617ba13b | 4519 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4520 | return journal; |
4521 | } | |
4522 | ||
617ba13b | 4523 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4524 | dev_t j_dev) |
4525 | { | |
2b2d6d01 | 4526 | struct buffer_head *bh; |
ac27a0ec | 4527 | journal_t *journal; |
617ba13b MC |
4528 | ext4_fsblk_t start; |
4529 | ext4_fsblk_t len; | |
ac27a0ec | 4530 | int hblock, blocksize; |
617ba13b | 4531 | ext4_fsblk_t sb_block; |
ac27a0ec | 4532 | unsigned long offset; |
2b2d6d01 | 4533 | struct ext4_super_block *es; |
ac27a0ec DK |
4534 | struct block_device *bdev; |
4535 | ||
e2b911c5 | 4536 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4537 | |
b31e1552 | 4538 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4539 | if (bdev == NULL) |
4540 | return NULL; | |
4541 | ||
ac27a0ec | 4542 | blocksize = sb->s_blocksize; |
e1defc4f | 4543 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4544 | if (blocksize < hblock) { |
b31e1552 ES |
4545 | ext4_msg(sb, KERN_ERR, |
4546 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4547 | goto out_bdev; |
4548 | } | |
4549 | ||
617ba13b MC |
4550 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4551 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4552 | set_blocksize(bdev, blocksize); |
4553 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4554 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4555 | "external journal"); | |
ac27a0ec DK |
4556 | goto out_bdev; |
4557 | } | |
4558 | ||
2716b802 | 4559 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4560 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4561 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4562 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4563 | ext4_msg(sb, KERN_ERR, "external journal has " |
4564 | "bad superblock"); | |
ac27a0ec DK |
4565 | brelse(bh); |
4566 | goto out_bdev; | |
4567 | } | |
4568 | ||
df4763be DW |
4569 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
4570 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
4571 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
4572 | ext4_msg(sb, KERN_ERR, "external journal has " | |
4573 | "corrupt superblock"); | |
4574 | brelse(bh); | |
4575 | goto out_bdev; | |
4576 | } | |
4577 | ||
617ba13b | 4578 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4579 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4580 | brelse(bh); |
4581 | goto out_bdev; | |
4582 | } | |
4583 | ||
bd81d8ee | 4584 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4585 | start = sb_block + 1; |
4586 | brelse(bh); /* we're done with the superblock */ | |
4587 | ||
dab291af | 4588 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4589 | start, len, blocksize); |
4590 | if (!journal) { | |
b31e1552 | 4591 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4592 | goto out_bdev; |
4593 | } | |
4594 | journal->j_private = sb; | |
dfec8a14 | 4595 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4596 | wait_on_buffer(journal->j_sb_buffer); |
4597 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4598 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4599 | goto out_journal; |
4600 | } | |
4601 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4602 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4603 | "user (unsupported) - %d", | |
ac27a0ec DK |
4604 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4605 | goto out_journal; | |
4606 | } | |
617ba13b MC |
4607 | EXT4_SB(sb)->journal_bdev = bdev; |
4608 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4609 | return journal; |
0b8e58a1 | 4610 | |
ac27a0ec | 4611 | out_journal: |
dab291af | 4612 | jbd2_journal_destroy(journal); |
ac27a0ec | 4613 | out_bdev: |
617ba13b | 4614 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4615 | return NULL; |
4616 | } | |
4617 | ||
617ba13b MC |
4618 | static int ext4_load_journal(struct super_block *sb, |
4619 | struct ext4_super_block *es, | |
ac27a0ec DK |
4620 | unsigned long journal_devnum) |
4621 | { | |
4622 | journal_t *journal; | |
4623 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4624 | dev_t journal_dev; | |
4625 | int err = 0; | |
4626 | int really_read_only; | |
4627 | ||
e2b911c5 | 4628 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4629 | |
ac27a0ec DK |
4630 | if (journal_devnum && |
4631 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4632 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4633 | "numbers have changed"); | |
ac27a0ec DK |
4634 | journal_dev = new_decode_dev(journal_devnum); |
4635 | } else | |
4636 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4637 | ||
4638 | really_read_only = bdev_read_only(sb->s_bdev); | |
4639 | ||
4640 | /* | |
4641 | * Are we loading a blank journal or performing recovery after a | |
4642 | * crash? For recovery, we need to check in advance whether we | |
4643 | * can get read-write access to the device. | |
4644 | */ | |
e2b911c5 | 4645 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
ac27a0ec | 4646 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4647 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4648 | "required on readonly filesystem"); | |
ac27a0ec | 4649 | if (really_read_only) { |
b31e1552 ES |
4650 | ext4_msg(sb, KERN_ERR, "write access " |
4651 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4652 | return -EROFS; |
4653 | } | |
b31e1552 ES |
4654 | ext4_msg(sb, KERN_INFO, "write access will " |
4655 | "be enabled during recovery"); | |
ac27a0ec DK |
4656 | } |
4657 | } | |
4658 | ||
4659 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4660 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4661 | "and inode journals!"); | |
ac27a0ec DK |
4662 | return -EINVAL; |
4663 | } | |
4664 | ||
4665 | if (journal_inum) { | |
617ba13b | 4666 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4667 | return -EINVAL; |
4668 | } else { | |
617ba13b | 4669 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4670 | return -EINVAL; |
4671 | } | |
4672 | ||
90576c0b | 4673 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4674 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4675 | |
e2b911c5 | 4676 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 4677 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4678 | if (!err) { |
4679 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4680 | if (save) | |
4681 | memcpy(save, ((char *) es) + | |
4682 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4683 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4684 | if (save) |
4685 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4686 | save, EXT4_S_ERR_LEN); | |
4687 | kfree(save); | |
4688 | } | |
ac27a0ec DK |
4689 | |
4690 | if (err) { | |
b31e1552 | 4691 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4692 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4693 | return err; |
4694 | } | |
4695 | ||
617ba13b MC |
4696 | EXT4_SB(sb)->s_journal = journal; |
4697 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4698 | |
c41303ce | 4699 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4700 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4701 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4702 | |
4703 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4704 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4705 | } |
4706 | ||
4707 | return 0; | |
4708 | } | |
4709 | ||
e2d67052 | 4710 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4711 | { |
e2d67052 | 4712 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4713 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4714 | int error = 0; |
ac27a0ec | 4715 | |
bdfe0cbd | 4716 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4717 | return error; |
71290b36 TT |
4718 | /* |
4719 | * If the file system is mounted read-only, don't update the | |
4720 | * superblock write time. This avoids updating the superblock | |
4721 | * write time when we are mounting the root file system | |
4722 | * read/only but we need to replay the journal; at that point, | |
4723 | * for people who are east of GMT and who make their clock | |
4724 | * tick in localtime for Windows bug-for-bug compatibility, | |
4725 | * the clock is set in the future, and this will cause e2fsck | |
4726 | * to complain and force a full file system check. | |
4727 | */ | |
4728 | if (!(sb->s_flags & MS_RDONLY)) | |
4729 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4730 | if (sb->s_bdev->bd_part) |
4731 | es->s_kbytes_written = | |
4732 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4733 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4734 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4735 | else |
4736 | es->s_kbytes_written = | |
4737 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
d5e03cbb TT |
4738 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) |
4739 | ext4_free_blocks_count_set(es, | |
57042651 TT |
4740 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( |
4741 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
d5e03cbb TT |
4742 | if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) |
4743 | es->s_free_inodes_count = | |
4744 | cpu_to_le32(percpu_counter_sum_positive( | |
ce7e010a | 4745 | &EXT4_SB(sb)->s_freeinodes_counter)); |
ac27a0ec | 4746 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4747 | ext4_superblock_csum_set(sb); |
1566a48a TT |
4748 | if (sync) |
4749 | lock_buffer(sbh); | |
4743f839 PKS |
4750 | if (buffer_write_io_error(sbh)) { |
4751 | /* | |
4752 | * Oh, dear. A previous attempt to write the | |
4753 | * superblock failed. This could happen because the | |
4754 | * USB device was yanked out. Or it could happen to | |
4755 | * be a transient write error and maybe the block will | |
4756 | * be remapped. Nothing we can do but to retry the | |
4757 | * write and hope for the best. | |
4758 | */ | |
4759 | ext4_msg(sb, KERN_ERR, "previous I/O error to " | |
4760 | "superblock detected"); | |
4761 | clear_buffer_write_io_error(sbh); | |
4762 | set_buffer_uptodate(sbh); | |
4763 | } | |
ac27a0ec | 4764 | mark_buffer_dirty(sbh); |
914258bf | 4765 | if (sync) { |
1566a48a | 4766 | unlock_buffer(sbh); |
564bc402 | 4767 | error = __sync_dirty_buffer(sbh, |
00473374 | 4768 | REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); |
c4be0c1d TS |
4769 | if (error) |
4770 | return error; | |
4771 | ||
4772 | error = buffer_write_io_error(sbh); | |
4773 | if (error) { | |
b31e1552 ES |
4774 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4775 | "superblock"); | |
914258bf TT |
4776 | clear_buffer_write_io_error(sbh); |
4777 | set_buffer_uptodate(sbh); | |
4778 | } | |
4779 | } | |
c4be0c1d | 4780 | return error; |
ac27a0ec DK |
4781 | } |
4782 | ||
ac27a0ec DK |
4783 | /* |
4784 | * Have we just finished recovery? If so, and if we are mounting (or | |
4785 | * remounting) the filesystem readonly, then we will end up with a | |
4786 | * consistent fs on disk. Record that fact. | |
4787 | */ | |
2b2d6d01 TT |
4788 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4789 | struct ext4_super_block *es) | |
ac27a0ec | 4790 | { |
617ba13b | 4791 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4792 | |
e2b911c5 | 4793 | if (!ext4_has_feature_journal(sb)) { |
0390131b FM |
4794 | BUG_ON(journal != NULL); |
4795 | return; | |
4796 | } | |
dab291af | 4797 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4798 | if (jbd2_journal_flush(journal) < 0) |
4799 | goto out; | |
4800 | ||
e2b911c5 | 4801 | if (ext4_has_feature_journal_needs_recovery(sb) && |
ac27a0ec | 4802 | sb->s_flags & MS_RDONLY) { |
e2b911c5 | 4803 | ext4_clear_feature_journal_needs_recovery(sb); |
e2d67052 | 4804 | ext4_commit_super(sb, 1); |
ac27a0ec | 4805 | } |
7ffe1ea8 HK |
4806 | |
4807 | out: | |
dab291af | 4808 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4809 | } |
4810 | ||
4811 | /* | |
4812 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4813 | * has recorded an error from a previous lifetime, move that error to the | |
4814 | * main filesystem now. | |
4815 | */ | |
2b2d6d01 TT |
4816 | static void ext4_clear_journal_err(struct super_block *sb, |
4817 | struct ext4_super_block *es) | |
ac27a0ec DK |
4818 | { |
4819 | journal_t *journal; | |
4820 | int j_errno; | |
4821 | const char *errstr; | |
4822 | ||
e2b911c5 | 4823 | BUG_ON(!ext4_has_feature_journal(sb)); |
0390131b | 4824 | |
617ba13b | 4825 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4826 | |
4827 | /* | |
4828 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4829 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4830 | */ |
4831 | ||
dab291af | 4832 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4833 | if (j_errno) { |
4834 | char nbuf[16]; | |
4835 | ||
617ba13b | 4836 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4837 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4838 | "from previous mount: %s", errstr); |
12062ddd | 4839 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4840 | |
617ba13b MC |
4841 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4842 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4843 | ext4_commit_super(sb, 1); |
ac27a0ec | 4844 | |
dab291af | 4845 | jbd2_journal_clear_err(journal); |
d796c52e | 4846 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4847 | } |
4848 | } | |
4849 | ||
4850 | /* | |
4851 | * Force the running and committing transactions to commit, | |
4852 | * and wait on the commit. | |
4853 | */ | |
617ba13b | 4854 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4855 | { |
4856 | journal_t *journal; | |
ac27a0ec DK |
4857 | |
4858 | if (sb->s_flags & MS_RDONLY) | |
4859 | return 0; | |
4860 | ||
617ba13b | 4861 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4862 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4863 | } |
4864 | ||
617ba13b | 4865 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4866 | { |
14ce0cb4 | 4867 | int ret = 0; |
9eddacf9 | 4868 | tid_t target; |
06a407f1 | 4869 | bool needs_barrier = false; |
8d5d02e6 | 4870 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4871 | |
0db1ff22 TT |
4872 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
4873 | return 0; | |
4874 | ||
9bffad1e | 4875 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4876 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4877 | /* |
4878 | * Writeback quota in non-journalled quota case - journalled quota has | |
4879 | * no dirty dquots | |
4880 | */ | |
4881 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4882 | /* |
4883 | * Data writeback is possible w/o journal transaction, so barrier must | |
4884 | * being sent at the end of the function. But we can skip it if | |
4885 | * transaction_commit will do it for us. | |
4886 | */ | |
bda32530 TT |
4887 | if (sbi->s_journal) { |
4888 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4889 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4890 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4891 | needs_barrier = true; | |
4892 | ||
4893 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
4894 | if (wait) | |
4895 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
4896 | target); | |
4897 | } | |
4898 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 4899 | needs_barrier = true; |
06a407f1 DM |
4900 | if (needs_barrier) { |
4901 | int err; | |
4902 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4903 | if (!ret) | |
4904 | ret = err; | |
0390131b | 4905 | } |
06a407f1 DM |
4906 | |
4907 | return ret; | |
4908 | } | |
4909 | ||
ac27a0ec DK |
4910 | /* |
4911 | * LVM calls this function before a (read-only) snapshot is created. This | |
4912 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4913 | * |
4914 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4915 | * state independently. It relies on upper layer to stop all data & metadata |
4916 | * modifications. | |
ac27a0ec | 4917 | */ |
c4be0c1d | 4918 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4919 | { |
c4be0c1d TS |
4920 | int error = 0; |
4921 | journal_t *journal; | |
ac27a0ec | 4922 | |
9ca92389 TT |
4923 | if (sb->s_flags & MS_RDONLY) |
4924 | return 0; | |
ac27a0ec | 4925 | |
9ca92389 | 4926 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4927 | |
bb044576 TT |
4928 | if (journal) { |
4929 | /* Now we set up the journal barrier. */ | |
4930 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4931 | |
bb044576 TT |
4932 | /* |
4933 | * Don't clear the needs_recovery flag if we failed to | |
4934 | * flush the journal. | |
4935 | */ | |
4936 | error = jbd2_journal_flush(journal); | |
4937 | if (error < 0) | |
4938 | goto out; | |
c642dc9e ES |
4939 | |
4940 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 4941 | ext4_clear_feature_journal_needs_recovery(sb); |
bb044576 | 4942 | } |
9ca92389 | 4943 | |
9ca92389 | 4944 | error = ext4_commit_super(sb, 1); |
6b0310fb | 4945 | out: |
bb044576 TT |
4946 | if (journal) |
4947 | /* we rely on upper layer to stop further updates */ | |
4948 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 4949 | return error; |
ac27a0ec DK |
4950 | } |
4951 | ||
4952 | /* | |
4953 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4954 | * flag here, even though the filesystem is not technically dirty yet. | |
4955 | */ | |
c4be0c1d | 4956 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4957 | { |
783d9485 | 4958 | if ((sb->s_flags & MS_RDONLY) || ext4_forced_shutdown(EXT4_SB(sb))) |
9ca92389 TT |
4959 | return 0; |
4960 | ||
c642dc9e ES |
4961 | if (EXT4_SB(sb)->s_journal) { |
4962 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 4963 | ext4_set_feature_journal_needs_recovery(sb); |
c642dc9e ES |
4964 | } |
4965 | ||
9ca92389 | 4966 | ext4_commit_super(sb, 1); |
c4be0c1d | 4967 | return 0; |
ac27a0ec DK |
4968 | } |
4969 | ||
673c6100 TT |
4970 | /* |
4971 | * Structure to save mount options for ext4_remount's benefit | |
4972 | */ | |
4973 | struct ext4_mount_options { | |
4974 | unsigned long s_mount_opt; | |
a2595b8a | 4975 | unsigned long s_mount_opt2; |
08cefc7a EB |
4976 | kuid_t s_resuid; |
4977 | kgid_t s_resgid; | |
673c6100 TT |
4978 | unsigned long s_commit_interval; |
4979 | u32 s_min_batch_time, s_max_batch_time; | |
4980 | #ifdef CONFIG_QUOTA | |
4981 | int s_jquota_fmt; | |
a2d4a646 | 4982 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
4983 | #endif |
4984 | }; | |
4985 | ||
2b2d6d01 | 4986 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4987 | { |
2b2d6d01 | 4988 | struct ext4_super_block *es; |
617ba13b | 4989 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4990 | unsigned long old_sb_flags; |
617ba13b | 4991 | struct ext4_mount_options old_opts; |
c79d967d | 4992 | int enable_quota = 0; |
8a266467 | 4993 | ext4_group_t g; |
b3881f74 | 4994 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4995 | int err = 0; |
ac27a0ec | 4996 | #ifdef CONFIG_QUOTA |
03dafb5f | 4997 | int i, j; |
ac27a0ec | 4998 | #endif |
d4c402d9 | 4999 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
5000 | |
5001 | /* Store the original options */ | |
5002 | old_sb_flags = sb->s_flags; | |
5003 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 5004 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
5005 | old_opts.s_resuid = sbi->s_resuid; |
5006 | old_opts.s_resgid = sbi->s_resgid; | |
5007 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
5008 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
5009 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
5010 | #ifdef CONFIG_QUOTA |
5011 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 5012 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f CG |
5013 | if (sbi->s_qf_names[i]) { |
5014 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
5015 | GFP_KERNEL); | |
5016 | if (!old_opts.s_qf_names[i]) { | |
5017 | for (j = 0; j < i; j++) | |
5018 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 5019 | kfree(orig_data); |
03dafb5f CG |
5020 | return -ENOMEM; |
5021 | } | |
5022 | } else | |
5023 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 5024 | #endif |
b3881f74 TT |
5025 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
5026 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec | 5027 | |
661aa520 | 5028 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
5029 | err = -EINVAL; |
5030 | goto restore_opts; | |
5031 | } | |
5032 | ||
6b992ff2 | 5033 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
5034 | test_opt(sb, JOURNAL_CHECKSUM)) { |
5035 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
5036 | "during remount not supported; ignoring"); |
5037 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
5038 | } |
5039 | ||
6ae6514b PS |
5040 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
5041 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
5042 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5043 | "both data=journal and delalloc"); | |
5044 | err = -EINVAL; | |
5045 | goto restore_opts; | |
5046 | } | |
5047 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
5048 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5049 | "both data=journal and dioread_nolock"); | |
5050 | err = -EINVAL; | |
5051 | goto restore_opts; | |
5052 | } | |
923ae0ff RZ |
5053 | if (test_opt(sb, DAX)) { |
5054 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5055 | "both data=journal and dax"); | |
5056 | err = -EINVAL; | |
5057 | goto restore_opts; | |
5058 | } | |
ab04df78 JK |
5059 | } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { |
5060 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
5061 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5062 | "journal_async_commit in data=ordered mode"); | |
5063 | err = -EINVAL; | |
5064 | goto restore_opts; | |
5065 | } | |
923ae0ff RZ |
5066 | } |
5067 | ||
cdb7ee4c TE |
5068 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { |
5069 | ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); | |
5070 | err = -EINVAL; | |
5071 | goto restore_opts; | |
5072 | } | |
5073 | ||
923ae0ff RZ |
5074 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { |
5075 | ext4_msg(sb, KERN_WARNING, "warning: refusing change of " | |
5076 | "dax flag with busy inodes while remounting"); | |
5077 | sbi->s_mount_opt ^= EXT4_MOUNT_DAX; | |
6ae6514b PS |
5078 | } |
5079 | ||
4ab2f15b | 5080 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 5081 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
5082 | |
5083 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 5084 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
5085 | |
5086 | es = sbi->s_es; | |
5087 | ||
b3881f74 | 5088 | if (sbi->s_journal) { |
0390131b | 5089 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
5090 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
5091 | } | |
ac27a0ec | 5092 | |
a2fd66d0 TT |
5093 | if (*flags & MS_LAZYTIME) |
5094 | sb->s_flags |= MS_LAZYTIME; | |
5095 | ||
661aa520 | 5096 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 5097 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
5098 | err = -EROFS; |
5099 | goto restore_opts; | |
5100 | } | |
5101 | ||
5102 | if (*flags & MS_RDONLY) { | |
38c03b34 TT |
5103 | err = sync_filesystem(sb); |
5104 | if (err < 0) | |
5105 | goto restore_opts; | |
0f0dd62f CH |
5106 | err = dquot_suspend(sb, -1); |
5107 | if (err < 0) | |
c79d967d | 5108 | goto restore_opts; |
c79d967d | 5109 | |
ac27a0ec DK |
5110 | /* |
5111 | * First of all, the unconditional stuff we have to do | |
5112 | * to disable replay of the journal when we next remount | |
5113 | */ | |
5114 | sb->s_flags |= MS_RDONLY; | |
5115 | ||
5116 | /* | |
5117 | * OK, test if we are remounting a valid rw partition | |
5118 | * readonly, and if so set the rdonly flag and then | |
5119 | * mark the partition as valid again. | |
5120 | */ | |
617ba13b MC |
5121 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
5122 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
5123 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
5124 | ||
a63c9eb2 | 5125 | if (sbi->s_journal) |
0390131b | 5126 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 5127 | } else { |
a13fb1a4 | 5128 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 5129 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 5130 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
5131 | err = -EROFS; |
5132 | goto restore_opts; | |
5133 | } | |
8a266467 TT |
5134 | /* |
5135 | * Make sure the group descriptor checksums | |
0b8e58a1 | 5136 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
5137 | */ |
5138 | for (g = 0; g < sbi->s_groups_count; g++) { | |
5139 | struct ext4_group_desc *gdp = | |
5140 | ext4_get_group_desc(sb, g, NULL); | |
5141 | ||
feb0ab32 | 5142 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
5143 | ext4_msg(sb, KERN_ERR, |
5144 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 5145 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 5146 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 5147 | err = -EFSBADCRC; |
8a266467 TT |
5148 | goto restore_opts; |
5149 | } | |
5150 | } | |
5151 | ||
ead6596b ES |
5152 | /* |
5153 | * If we have an unprocessed orphan list hanging | |
5154 | * around from a previously readonly bdev mount, | |
5155 | * require a full umount/remount for now. | |
5156 | */ | |
5157 | if (es->s_last_orphan) { | |
b31e1552 | 5158 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
5159 | "remount RDWR because of unprocessed " |
5160 | "orphan inode list. Please " | |
b31e1552 | 5161 | "umount/remount instead"); |
ead6596b ES |
5162 | err = -EINVAL; |
5163 | goto restore_opts; | |
5164 | } | |
5165 | ||
ac27a0ec DK |
5166 | /* |
5167 | * Mounting a RDONLY partition read-write, so reread | |
5168 | * and store the current valid flag. (It may have | |
5169 | * been changed by e2fsck since we originally mounted | |
5170 | * the partition.) | |
5171 | */ | |
0390131b FM |
5172 | if (sbi->s_journal) |
5173 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 5174 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 5175 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 5176 | sb->s_flags &= ~MS_RDONLY; |
e2b911c5 | 5177 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
5178 | if (ext4_multi_mount_protect(sb, |
5179 | le64_to_cpu(es->s_mmp_block))) { | |
5180 | err = -EROFS; | |
5181 | goto restore_opts; | |
5182 | } | |
c79d967d | 5183 | enable_quota = 1; |
ac27a0ec DK |
5184 | } |
5185 | } | |
bfff6873 LC |
5186 | |
5187 | /* | |
5188 | * Reinitialize lazy itable initialization thread based on | |
5189 | * current settings | |
5190 | */ | |
5191 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
5192 | ext4_unregister_li_request(sb); | |
5193 | else { | |
5194 | ext4_group_t first_not_zeroed; | |
5195 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
5196 | ext4_register_li_request(sb, first_not_zeroed); | |
5197 | } | |
5198 | ||
6fd058f7 | 5199 | ext4_setup_system_zone(sb); |
d096ad0f | 5200 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 5201 | ext4_commit_super(sb, 1); |
0390131b | 5202 | |
ac27a0ec DK |
5203 | #ifdef CONFIG_QUOTA |
5204 | /* Release old quota file names */ | |
a2d4a646 | 5205 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 5206 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
5207 | if (enable_quota) { |
5208 | if (sb_any_quota_suspended(sb)) | |
5209 | dquot_resume(sb, -1); | |
e2b911c5 | 5210 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 5211 | err = ext4_enable_quotas(sb); |
07724f98 | 5212 | if (err) |
7c319d32 | 5213 | goto restore_opts; |
7c319d32 AK |
5214 | } |
5215 | } | |
ac27a0ec | 5216 | #endif |
d4c402d9 | 5217 | |
a26f4992 | 5218 | *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); |
d4c402d9 CW |
5219 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); |
5220 | kfree(orig_data); | |
ac27a0ec | 5221 | return 0; |
0b8e58a1 | 5222 | |
ac27a0ec DK |
5223 | restore_opts: |
5224 | sb->s_flags = old_sb_flags; | |
5225 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 5226 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
5227 | sbi->s_resuid = old_opts.s_resuid; |
5228 | sbi->s_resgid = old_opts.s_resgid; | |
5229 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
5230 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
5231 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
5232 | #ifdef CONFIG_QUOTA |
5233 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 5234 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
03dafb5f | 5235 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
5236 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
5237 | } | |
5238 | #endif | |
d4c402d9 | 5239 | kfree(orig_data); |
ac27a0ec DK |
5240 | return err; |
5241 | } | |
5242 | ||
689c958c LX |
5243 | #ifdef CONFIG_QUOTA |
5244 | static int ext4_statfs_project(struct super_block *sb, | |
5245 | kprojid_t projid, struct kstatfs *buf) | |
5246 | { | |
5247 | struct kqid qid; | |
5248 | struct dquot *dquot; | |
5249 | u64 limit; | |
5250 | u64 curblock; | |
5251 | ||
5252 | qid = make_kqid_projid(projid); | |
5253 | dquot = dqget(sb, qid); | |
5254 | if (IS_ERR(dquot)) | |
5255 | return PTR_ERR(dquot); | |
5256 | spin_lock(&dq_data_lock); | |
5257 | ||
5258 | limit = (dquot->dq_dqb.dqb_bsoftlimit ? | |
5259 | dquot->dq_dqb.dqb_bsoftlimit : | |
5260 | dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; | |
5261 | if (limit && buf->f_blocks > limit) { | |
5262 | curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; | |
5263 | buf->f_blocks = limit; | |
5264 | buf->f_bfree = buf->f_bavail = | |
5265 | (buf->f_blocks > curblock) ? | |
5266 | (buf->f_blocks - curblock) : 0; | |
5267 | } | |
5268 | ||
5269 | limit = dquot->dq_dqb.dqb_isoftlimit ? | |
5270 | dquot->dq_dqb.dqb_isoftlimit : | |
5271 | dquot->dq_dqb.dqb_ihardlimit; | |
5272 | if (limit && buf->f_files > limit) { | |
5273 | buf->f_files = limit; | |
5274 | buf->f_ffree = | |
5275 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
5276 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
5277 | } | |
5278 | ||
5279 | spin_unlock(&dq_data_lock); | |
5280 | dqput(dquot); | |
5281 | return 0; | |
5282 | } | |
5283 | #endif | |
5284 | ||
2b2d6d01 | 5285 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
5286 | { |
5287 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
5288 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
5289 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 5290 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 5291 | u64 fsid; |
d02a9391 | 5292 | s64 bfree; |
27dd4385 | 5293 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 5294 | |
952fc18e TT |
5295 | if (!test_opt(sb, MINIX_DF)) |
5296 | overhead = sbi->s_overhead; | |
ac27a0ec | 5297 | |
617ba13b | 5298 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 5299 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 5300 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
5301 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
5302 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 5303 | /* prevent underflow in case that few free space is available */ |
57042651 | 5304 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
5305 | buf->f_bavail = buf->f_bfree - |
5306 | (ext4_r_blocks_count(es) + resv_blocks); | |
5307 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
5308 | buf->f_bavail = 0; |
5309 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 5310 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 5311 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
5312 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
5313 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
5314 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
5315 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 5316 | |
689c958c LX |
5317 | #ifdef CONFIG_QUOTA |
5318 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
5319 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
5320 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
5321 | #endif | |
ac27a0ec DK |
5322 | return 0; |
5323 | } | |
5324 | ||
0b8e58a1 AD |
5325 | /* Helper function for writing quotas on sync - we need to start transaction |
5326 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 5327 | * Process 1 Process 2 |
617ba13b | 5328 | * ext4_create() quota_sync() |
a269eb18 | 5329 | * jbd2_journal_start() write_dquot() |
871a2931 | 5330 | * dquot_initialize() down(dqio_mutex) |
dab291af | 5331 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
5332 | * |
5333 | */ | |
5334 | ||
5335 | #ifdef CONFIG_QUOTA | |
5336 | ||
5337 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
5338 | { | |
4c376dca | 5339 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
5340 | } |
5341 | ||
617ba13b | 5342 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
5343 | { |
5344 | int ret, err; | |
5345 | handle_t *handle; | |
5346 | struct inode *inode; | |
5347 | ||
5348 | inode = dquot_to_inode(dquot); | |
9924a92a | 5349 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 5350 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5351 | if (IS_ERR(handle)) |
5352 | return PTR_ERR(handle); | |
5353 | ret = dquot_commit(dquot); | |
617ba13b | 5354 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5355 | if (!ret) |
5356 | ret = err; | |
5357 | return ret; | |
5358 | } | |
5359 | ||
617ba13b | 5360 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
5361 | { |
5362 | int ret, err; | |
5363 | handle_t *handle; | |
5364 | ||
9924a92a | 5365 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5366 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5367 | if (IS_ERR(handle)) |
5368 | return PTR_ERR(handle); | |
5369 | ret = dquot_acquire(dquot); | |
617ba13b | 5370 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5371 | if (!ret) |
5372 | ret = err; | |
5373 | return ret; | |
5374 | } | |
5375 | ||
617ba13b | 5376 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5377 | { |
5378 | int ret, err; | |
5379 | handle_t *handle; | |
5380 | ||
9924a92a | 5381 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5382 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5383 | if (IS_ERR(handle)) { |
5384 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5385 | dquot_release(dquot); | |
ac27a0ec | 5386 | return PTR_ERR(handle); |
9c3013e9 | 5387 | } |
ac27a0ec | 5388 | ret = dquot_release(dquot); |
617ba13b | 5389 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5390 | if (!ret) |
5391 | ret = err; | |
5392 | return ret; | |
5393 | } | |
5394 | ||
617ba13b | 5395 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5396 | { |
262b4662 JK |
5397 | struct super_block *sb = dquot->dq_sb; |
5398 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5399 | ||
2c8be6b2 | 5400 | /* Are we journaling quotas? */ |
e2b911c5 | 5401 | if (ext4_has_feature_quota(sb) || |
262b4662 | 5402 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
ac27a0ec | 5403 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5404 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5405 | } else { |
5406 | return dquot_mark_dquot_dirty(dquot); | |
5407 | } | |
5408 | } | |
5409 | ||
617ba13b | 5410 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5411 | { |
5412 | int ret, err; | |
5413 | handle_t *handle; | |
5414 | ||
5415 | /* Data block + inode block */ | |
2b0143b5 | 5416 | handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5417 | if (IS_ERR(handle)) |
5418 | return PTR_ERR(handle); | |
5419 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5420 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5421 | if (!ret) |
5422 | ret = err; | |
5423 | return ret; | |
5424 | } | |
5425 | ||
5426 | /* | |
5427 | * Turn on quotas during mount time - we need to find | |
5428 | * the quota file and such... | |
5429 | */ | |
617ba13b | 5430 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5431 | { |
287a8095 CH |
5432 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5433 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5434 | } |
5435 | ||
daf647d2 TT |
5436 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
5437 | { | |
5438 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5439 | ||
5440 | /* The first argument of lockdep_set_subclass has to be | |
5441 | * *exactly* the same as the argument to init_rwsem() --- in | |
5442 | * this case, in init_once() --- or lockdep gets unhappy | |
5443 | * because the name of the lock is set using the | |
5444 | * stringification of the argument to init_rwsem(). | |
5445 | */ | |
5446 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ | |
5447 | lockdep_set_subclass(&ei->i_data_sem, subclass); | |
5448 | } | |
5449 | ||
ac27a0ec DK |
5450 | /* |
5451 | * Standard function to be called on quota_on | |
5452 | */ | |
617ba13b | 5453 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 5454 | const struct path *path) |
ac27a0ec DK |
5455 | { |
5456 | int err; | |
ac27a0ec DK |
5457 | |
5458 | if (!test_opt(sb, QUOTA)) | |
5459 | return -EINVAL; | |
0623543b | 5460 | |
ac27a0ec | 5461 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5462 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5463 | return -EXDEV; |
0623543b JK |
5464 | /* Journaling quota? */ |
5465 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5466 | /* Quotafile not in fs root? */ |
f00c9e44 | 5467 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5468 | ext4_msg(sb, KERN_WARNING, |
5469 | "Quota file not on filesystem root. " | |
5470 | "Journaled quota will not work"); | |
2b2d6d01 | 5471 | } |
0623543b JK |
5472 | |
5473 | /* | |
5474 | * When we journal data on quota file, we have to flush journal to see | |
5475 | * all updates to the file when we bypass pagecache... | |
5476 | */ | |
0390131b | 5477 | if (EXT4_SB(sb)->s_journal && |
2b0143b5 | 5478 | ext4_should_journal_data(d_inode(path->dentry))) { |
0623543b JK |
5479 | /* |
5480 | * We don't need to lock updates but journal_flush() could | |
5481 | * otherwise be livelocked... | |
5482 | */ | |
5483 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5484 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5485 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5486 | if (err) |
7ffe1ea8 | 5487 | return err; |
0623543b | 5488 | } |
957153fc | 5489 | |
daf647d2 TT |
5490 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
5491 | err = dquot_quota_on(sb, type, format_id, path); | |
957153fc | 5492 | if (err) { |
daf647d2 TT |
5493 | lockdep_set_quota_inode(path->dentry->d_inode, |
5494 | I_DATA_SEM_NORMAL); | |
957153fc JK |
5495 | } else { |
5496 | struct inode *inode = d_inode(path->dentry); | |
5497 | handle_t *handle; | |
5498 | ||
61a92987 JK |
5499 | /* |
5500 | * Set inode flags to prevent userspace from messing with quota | |
5501 | * files. If this fails, we return success anyway since quotas | |
5502 | * are already enabled and this is not a hard failure. | |
5503 | */ | |
957153fc JK |
5504 | inode_lock(inode); |
5505 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); | |
5506 | if (IS_ERR(handle)) | |
5507 | goto unlock_inode; | |
5508 | EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; | |
5509 | inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, | |
5510 | S_NOATIME | S_IMMUTABLE); | |
5511 | ext4_mark_inode_dirty(handle, inode); | |
5512 | ext4_journal_stop(handle); | |
5513 | unlock_inode: | |
5514 | inode_unlock(inode); | |
5515 | } | |
daf647d2 | 5516 | return err; |
ac27a0ec DK |
5517 | } |
5518 | ||
7c319d32 AK |
5519 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5520 | unsigned int flags) | |
5521 | { | |
5522 | int err; | |
5523 | struct inode *qf_inode; | |
a2d4a646 | 5524 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5525 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5526 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5527 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
5528 | }; |
5529 | ||
e2b911c5 | 5530 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
5531 | |
5532 | if (!qf_inums[type]) | |
5533 | return -EPERM; | |
5534 | ||
5535 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5536 | if (IS_ERR(qf_inode)) { | |
5537 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5538 | return PTR_ERR(qf_inode); | |
5539 | } | |
5540 | ||
bcb13850 JK |
5541 | /* Don't account quota for quota files to avoid recursion */ |
5542 | qf_inode->i_flags |= S_NOQUOTA; | |
daf647d2 | 5543 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
7c319d32 AK |
5544 | err = dquot_enable(qf_inode, type, format_id, flags); |
5545 | iput(qf_inode); | |
daf647d2 TT |
5546 | if (err) |
5547 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); | |
7c319d32 AK |
5548 | |
5549 | return err; | |
5550 | } | |
5551 | ||
5552 | /* Enable usage tracking for all quota types. */ | |
5553 | static int ext4_enable_quotas(struct super_block *sb) | |
5554 | { | |
5555 | int type, err = 0; | |
a2d4a646 | 5556 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 5557 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
5558 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
5559 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 | 5560 | }; |
49da9392 JK |
5561 | bool quota_mopt[EXT4_MAXQUOTAS] = { |
5562 | test_opt(sb, USRQUOTA), | |
5563 | test_opt(sb, GRPQUOTA), | |
5564 | test_opt(sb, PRJQUOTA), | |
5565 | }; | |
7c319d32 AK |
5566 | |
5567 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
a2d4a646 | 5568 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
5569 | if (qf_inums[type]) { |
5570 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
49da9392 JK |
5571 | DQUOT_USAGE_ENABLED | |
5572 | (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); | |
7c319d32 | 5573 | if (err) { |
8c6cd47e | 5574 | for (type--; type >= 0; type--) |
5575 | dquot_quota_off(sb, type); | |
5576 | ||
7c319d32 | 5577 | ext4_warning(sb, |
72ba7450 TT |
5578 | "Failed to enable quota tracking " |
5579 | "(type=%d, err=%d). Please run " | |
5580 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5581 | return err; |
5582 | } | |
5583 | } | |
5584 | } | |
5585 | return 0; | |
5586 | } | |
5587 | ||
ca0e05e4 DM |
5588 | static int ext4_quota_off(struct super_block *sb, int type) |
5589 | { | |
21f97697 JK |
5590 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5591 | handle_t *handle; | |
957153fc | 5592 | int err; |
21f97697 | 5593 | |
87009d86 DM |
5594 | /* Force all delayed allocation blocks to be allocated. |
5595 | * Caller already holds s_umount sem */ | |
5596 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5597 | sync_filesystem(sb); |
ca0e05e4 | 5598 | |
957153fc | 5599 | if (!inode || !igrab(inode)) |
0b268590 AG |
5600 | goto out; |
5601 | ||
957153fc | 5602 | err = dquot_quota_off(sb, type); |
964edf66 | 5603 | if (err || ext4_has_feature_quota(sb)) |
957153fc JK |
5604 | goto out_put; |
5605 | ||
5606 | inode_lock(inode); | |
61a92987 JK |
5607 | /* |
5608 | * Update modification times of quota files when userspace can | |
5609 | * start looking at them. If we fail, we return success anyway since | |
5610 | * this is not a hard failure and quotas are already disabled. | |
5611 | */ | |
9924a92a | 5612 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 | 5613 | if (IS_ERR(handle)) |
957153fc JK |
5614 | goto out_unlock; |
5615 | EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); | |
5616 | inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); | |
eeca7ea1 | 5617 | inode->i_mtime = inode->i_ctime = current_time(inode); |
21f97697 JK |
5618 | ext4_mark_inode_dirty(handle, inode); |
5619 | ext4_journal_stop(handle); | |
957153fc JK |
5620 | out_unlock: |
5621 | inode_unlock(inode); | |
5622 | out_put: | |
964edf66 | 5623 | lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); |
957153fc JK |
5624 | iput(inode); |
5625 | return err; | |
21f97697 | 5626 | out: |
ca0e05e4 DM |
5627 | return dquot_quota_off(sb, type); |
5628 | } | |
5629 | ||
ac27a0ec DK |
5630 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5631 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5632 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5633 | * we don't have to be afraid of races */ |
617ba13b | 5634 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5635 | size_t len, loff_t off) |
5636 | { | |
5637 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5638 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5639 | int offset = off & (sb->s_blocksize - 1); |
5640 | int tocopy; | |
5641 | size_t toread; | |
5642 | struct buffer_head *bh; | |
5643 | loff_t i_size = i_size_read(inode); | |
5644 | ||
5645 | if (off > i_size) | |
5646 | return 0; | |
5647 | if (off+len > i_size) | |
5648 | len = i_size-off; | |
5649 | toread = len; | |
5650 | while (toread > 0) { | |
5651 | tocopy = sb->s_blocksize - offset < toread ? | |
5652 | sb->s_blocksize - offset : toread; | |
1c215028 TT |
5653 | bh = ext4_bread(NULL, inode, blk, 0); |
5654 | if (IS_ERR(bh)) | |
5655 | return PTR_ERR(bh); | |
ac27a0ec DK |
5656 | if (!bh) /* A hole? */ |
5657 | memset(data, 0, tocopy); | |
5658 | else | |
5659 | memcpy(data, bh->b_data+offset, tocopy); | |
5660 | brelse(bh); | |
5661 | offset = 0; | |
5662 | toread -= tocopy; | |
5663 | data += tocopy; | |
5664 | blk++; | |
5665 | } | |
5666 | return len; | |
5667 | } | |
5668 | ||
5669 | /* Write to quotafile (we know the transaction is already started and has | |
5670 | * enough credits) */ | |
617ba13b | 5671 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5672 | const char *data, size_t len, loff_t off) |
5673 | { | |
5674 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5675 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
1c215028 | 5676 | int err, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 5677 | int retries = 0; |
ac27a0ec DK |
5678 | struct buffer_head *bh; |
5679 | handle_t *handle = journal_current_handle(); | |
5680 | ||
0390131b | 5681 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5682 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5683 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5684 | (unsigned long long)off, (unsigned long long)len); |
5685 | return -EIO; | |
5686 | } | |
67eeb568 DM |
5687 | /* |
5688 | * Since we account only one data block in transaction credits, | |
5689 | * then it is impossible to cross a block boundary. | |
5690 | */ | |
5691 | if (sb->s_blocksize - offset < len) { | |
5692 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5693 | " cancelled because not block aligned", | |
5694 | (unsigned long long)off, (unsigned long long)len); | |
5695 | return -EIO; | |
5696 | } | |
5697 | ||
c5e298ae TT |
5698 | do { |
5699 | bh = ext4_bread(handle, inode, blk, | |
5700 | EXT4_GET_BLOCKS_CREATE | | |
5701 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
5702 | } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && | |
5703 | ext4_should_retry_alloc(inode->i_sb, &retries)); | |
1c215028 TT |
5704 | if (IS_ERR(bh)) |
5705 | return PTR_ERR(bh); | |
67eeb568 DM |
5706 | if (!bh) |
5707 | goto out; | |
5d601255 | 5708 | BUFFER_TRACE(bh, "get write access"); |
62d2b5f2 JK |
5709 | err = ext4_journal_get_write_access(handle, bh); |
5710 | if (err) { | |
5711 | brelse(bh); | |
1c215028 | 5712 | return err; |
ac27a0ec | 5713 | } |
67eeb568 DM |
5714 | lock_buffer(bh); |
5715 | memcpy(bh->b_data+offset, data, len); | |
5716 | flush_dcache_page(bh->b_page); | |
5717 | unlock_buffer(bh); | |
62d2b5f2 | 5718 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5719 | brelse(bh); |
ac27a0ec | 5720 | out: |
67eeb568 DM |
5721 | if (inode->i_size < off + len) { |
5722 | i_size_write(inode, off + len); | |
617ba13b | 5723 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5724 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5725 | } |
67eeb568 | 5726 | return len; |
ac27a0ec DK |
5727 | } |
5728 | ||
8f0e8746 TT |
5729 | static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) |
5730 | { | |
5731 | const struct quota_format_ops *ops; | |
5732 | ||
5733 | if (!sb_has_quota_loaded(sb, qid->type)) | |
5734 | return -ESRCH; | |
5735 | ops = sb_dqopt(sb)->ops[qid->type]; | |
5736 | if (!ops || !ops->get_next_id) | |
5737 | return -ENOSYS; | |
5738 | return dquot_get_next_id(sb, qid); | |
5739 | } | |
ac27a0ec DK |
5740 | #endif |
5741 | ||
152a0836 AV |
5742 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5743 | const char *dev_name, void *data) | |
ac27a0ec | 5744 | { |
152a0836 | 5745 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5746 | } |
5747 | ||
c290ea01 | 5748 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
5749 | static inline void register_as_ext2(void) |
5750 | { | |
5751 | int err = register_filesystem(&ext2_fs_type); | |
5752 | if (err) | |
5753 | printk(KERN_WARNING | |
5754 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5755 | } | |
5756 | ||
5757 | static inline void unregister_as_ext2(void) | |
5758 | { | |
5759 | unregister_filesystem(&ext2_fs_type); | |
5760 | } | |
2035e776 TT |
5761 | |
5762 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5763 | { | |
e2b911c5 | 5764 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 TT |
5765 | return 0; |
5766 | if (sb->s_flags & MS_RDONLY) | |
5767 | return 1; | |
e2b911c5 | 5768 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
5769 | return 0; |
5770 | return 1; | |
5771 | } | |
24b58424 TT |
5772 | #else |
5773 | static inline void register_as_ext2(void) { } | |
5774 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5775 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5776 | #endif |
5777 | ||
24b58424 TT |
5778 | static inline void register_as_ext3(void) |
5779 | { | |
5780 | int err = register_filesystem(&ext3_fs_type); | |
5781 | if (err) | |
5782 | printk(KERN_WARNING | |
5783 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5784 | } | |
5785 | ||
5786 | static inline void unregister_as_ext3(void) | |
5787 | { | |
5788 | unregister_filesystem(&ext3_fs_type); | |
5789 | } | |
2035e776 TT |
5790 | |
5791 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5792 | { | |
e2b911c5 | 5793 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 5794 | return 0; |
e2b911c5 | 5795 | if (!ext4_has_feature_journal(sb)) |
2035e776 TT |
5796 | return 0; |
5797 | if (sb->s_flags & MS_RDONLY) | |
5798 | return 1; | |
e2b911c5 | 5799 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
5800 | return 0; |
5801 | return 1; | |
5802 | } | |
24b58424 | 5803 | |
03010a33 TT |
5804 | static struct file_system_type ext4_fs_type = { |
5805 | .owner = THIS_MODULE, | |
5806 | .name = "ext4", | |
152a0836 | 5807 | .mount = ext4_mount, |
03010a33 | 5808 | .kill_sb = kill_block_super, |
afdbd4a6 | 5809 | .fs_flags = FS_REQUIRES_DEV | FS_USERNS_MOUNT, |
03010a33 | 5810 | }; |
7f78e035 | 5811 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5812 | |
e9e3bcec ES |
5813 | /* Shared across all ext4 file systems */ |
5814 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
e9e3bcec | 5815 | |
5dabfc78 | 5816 | static int __init ext4_init_fs(void) |
ac27a0ec | 5817 | { |
e9e3bcec | 5818 | int i, err; |
c9de560d | 5819 | |
e294a537 | 5820 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 AV |
5821 | ext4_li_info = NULL; |
5822 | mutex_init(&ext4_li_mtx); | |
5823 | ||
9a4c8019 | 5824 | /* Build-time check for flags consistency */ |
12e9b892 | 5825 | ext4_check_flag_values(); |
e9e3bcec | 5826 | |
e142d052 | 5827 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
e9e3bcec | 5828 | init_waitqueue_head(&ext4__ioend_wq[i]); |
e9e3bcec | 5829 | |
51865fda | 5830 | err = ext4_init_es(); |
6fd058f7 TT |
5831 | if (err) |
5832 | return err; | |
51865fda ZL |
5833 | |
5834 | err = ext4_init_pageio(); | |
5835 | if (err) | |
b5799018 | 5836 | goto out5; |
51865fda | 5837 | |
5dabfc78 | 5838 | err = ext4_init_system_zone(); |
bd2d0210 | 5839 | if (err) |
b5799018 | 5840 | goto out4; |
857ac889 | 5841 | |
b5799018 | 5842 | err = ext4_init_sysfs(); |
dd68314c | 5843 | if (err) |
b5799018 | 5844 | goto out3; |
857ac889 | 5845 | |
5dabfc78 | 5846 | err = ext4_init_mballoc(); |
c9de560d AT |
5847 | if (err) |
5848 | goto out2; | |
ac27a0ec DK |
5849 | err = init_inodecache(); |
5850 | if (err) | |
5851 | goto out1; | |
24b58424 | 5852 | register_as_ext3(); |
2035e776 | 5853 | register_as_ext2(); |
03010a33 | 5854 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5855 | if (err) |
5856 | goto out; | |
bfff6873 | 5857 | |
ac27a0ec DK |
5858 | return 0; |
5859 | out: | |
24b58424 TT |
5860 | unregister_as_ext2(); |
5861 | unregister_as_ext3(); | |
ac27a0ec DK |
5862 | destroy_inodecache(); |
5863 | out1: | |
5dabfc78 | 5864 | ext4_exit_mballoc(); |
9c191f70 | 5865 | out2: |
b5799018 TT |
5866 | ext4_exit_sysfs(); |
5867 | out3: | |
5dabfc78 | 5868 | ext4_exit_system_zone(); |
b5799018 | 5869 | out4: |
5dabfc78 | 5870 | ext4_exit_pageio(); |
b5799018 | 5871 | out5: |
51865fda ZL |
5872 | ext4_exit_es(); |
5873 | ||
ac27a0ec DK |
5874 | return err; |
5875 | } | |
5876 | ||
5dabfc78 | 5877 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5878 | { |
bfff6873 | 5879 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5880 | unregister_as_ext2(); |
5881 | unregister_as_ext3(); | |
03010a33 | 5882 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5883 | destroy_inodecache(); |
5dabfc78 | 5884 | ext4_exit_mballoc(); |
b5799018 | 5885 | ext4_exit_sysfs(); |
5dabfc78 TT |
5886 | ext4_exit_system_zone(); |
5887 | ext4_exit_pageio(); | |
dd12ed14 | 5888 | ext4_exit_es(); |
ac27a0ec DK |
5889 | } |
5890 | ||
5891 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5892 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5893 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5894 | module_init(ext4_init_fs) |
5895 | module_exit(ext4_exit_fs) |