Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
7abc52c2 | 41 | #include <linux/cleancache.h> |
ac27a0ec DK |
42 | #include <asm/uaccess.h> |
43 | ||
bfff6873 LC |
44 | #include <linux/kthread.h> |
45 | #include <linux/freezer.h> | |
46 | ||
3dcf5451 | 47 | #include "ext4.h" |
4a092d73 | 48 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 49 | #include "ext4_jbd2.h" |
ac27a0ec DK |
50 | #include "xattr.h" |
51 | #include "acl.h" | |
3661d286 | 52 | #include "mballoc.h" |
ac27a0ec | 53 | |
9bffad1e TT |
54 | #define CREATE_TRACE_POINTS |
55 | #include <trace/events/ext4.h> | |
56 | ||
1f109d5a | 57 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 58 | static struct kset *ext4_kset; |
0b75a840 LC |
59 | static struct ext4_lazy_init *ext4_li_info; |
60 | static struct mutex ext4_li_mtx; | |
61 | static struct ext4_features *ext4_feat; | |
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); |
06a407f1 | 72 | static int ext4_sync_fs_nojournal(struct super_block *sb, int wait); |
2b2d6d01 TT |
73 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
74 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 75 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 76 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
77 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
78 | const char *dev_name, void *data); | |
2035e776 TT |
79 | static inline int ext2_feature_set_ok(struct super_block *sb); |
80 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 81 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
82 | static void ext4_destroy_lazyinit_thread(void); |
83 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 84 | static void ext4_clear_request_list(void); |
27dd4385 | 85 | static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); |
ac27a0ec | 86 | |
2035e776 TT |
87 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
88 | static struct file_system_type ext2_fs_type = { | |
89 | .owner = THIS_MODULE, | |
90 | .name = "ext2", | |
91 | .mount = ext4_mount, | |
92 | .kill_sb = kill_block_super, | |
93 | .fs_flags = FS_REQUIRES_DEV, | |
94 | }; | |
7f78e035 | 95 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 96 | MODULE_ALIAS("ext2"); |
2035e776 TT |
97 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
98 | #else | |
99 | #define IS_EXT2_SB(sb) (0) | |
100 | #endif | |
101 | ||
102 | ||
ba69f9ab JK |
103 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
104 | static struct file_system_type ext3_fs_type = { | |
105 | .owner = THIS_MODULE, | |
106 | .name = "ext3", | |
152a0836 | 107 | .mount = ext4_mount, |
ba69f9ab JK |
108 | .kill_sb = kill_block_super, |
109 | .fs_flags = FS_REQUIRES_DEV, | |
110 | }; | |
7f78e035 | 111 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 112 | MODULE_ALIAS("ext3"); |
ba69f9ab JK |
113 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
114 | #else | |
115 | #define IS_EXT3_SB(sb) (0) | |
116 | #endif | |
bd81d8ee | 117 | |
d25425f8 DW |
118 | static int ext4_verify_csum_type(struct super_block *sb, |
119 | struct ext4_super_block *es) | |
120 | { | |
121 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
122 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
123 | return 1; | |
124 | ||
125 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
126 | } | |
127 | ||
a9c47317 DW |
128 | static __le32 ext4_superblock_csum(struct super_block *sb, |
129 | struct ext4_super_block *es) | |
130 | { | |
131 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
132 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
133 | __u32 csum; | |
134 | ||
135 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
136 | ||
137 | return cpu_to_le32(csum); | |
138 | } | |
139 | ||
140 | int ext4_superblock_csum_verify(struct super_block *sb, | |
141 | struct ext4_super_block *es) | |
142 | { | |
143 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
144 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
145 | return 1; | |
146 | ||
147 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
148 | } | |
149 | ||
06db49e6 | 150 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 151 | { |
06db49e6 TT |
152 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
153 | ||
a9c47317 DW |
154 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, |
155 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
156 | return; | |
157 | ||
158 | es->s_checksum = ext4_superblock_csum(sb, es); | |
159 | } | |
160 | ||
9933fc0a TT |
161 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
162 | { | |
163 | void *ret; | |
164 | ||
8be04b93 | 165 | ret = kmalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
166 | if (!ret) |
167 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
172 | { | |
173 | void *ret; | |
174 | ||
8be04b93 | 175 | ret = kzalloc(size, flags | __GFP_NOWARN); |
9933fc0a TT |
176 | if (!ret) |
177 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
178 | return ret; | |
179 | } | |
180 | ||
181 | void ext4_kvfree(void *ptr) | |
182 | { | |
183 | if (is_vmalloc_addr(ptr)) | |
184 | vfree(ptr); | |
185 | else | |
186 | kfree(ptr); | |
187 | ||
188 | } | |
189 | ||
8fadc143 AR |
190 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
191 | struct ext4_group_desc *bg) | |
bd81d8ee | 192 | { |
3a14589c | 193 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 194 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 195 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
196 | } |
197 | ||
8fadc143 AR |
198 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
199 | struct ext4_group_desc *bg) | |
bd81d8ee | 200 | { |
5272f837 | 201 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 202 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 203 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
204 | } |
205 | ||
8fadc143 AR |
206 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
207 | struct ext4_group_desc *bg) | |
bd81d8ee | 208 | { |
5272f837 | 209 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 210 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 211 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
212 | } |
213 | ||
021b65bb TT |
214 | __u32 ext4_free_group_clusters(struct super_block *sb, |
215 | struct ext4_group_desc *bg) | |
560671a0 AK |
216 | { |
217 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
218 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 219 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
220 | } |
221 | ||
222 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
223 | struct ext4_group_desc *bg) | |
224 | { | |
225 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
226 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 227 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
228 | } |
229 | ||
230 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
231 | struct ext4_group_desc *bg) | |
232 | { | |
233 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
234 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 235 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
236 | } |
237 | ||
238 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
239 | struct ext4_group_desc *bg) | |
240 | { | |
241 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
242 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 243 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
244 | } |
245 | ||
8fadc143 AR |
246 | void ext4_block_bitmap_set(struct super_block *sb, |
247 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 248 | { |
3a14589c | 249 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
250 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
251 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
252 | } |
253 | ||
8fadc143 AR |
254 | void ext4_inode_bitmap_set(struct super_block *sb, |
255 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 256 | { |
5272f837 | 257 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
258 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
259 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
260 | } |
261 | ||
8fadc143 AR |
262 | void ext4_inode_table_set(struct super_block *sb, |
263 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 264 | { |
5272f837 | 265 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
266 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
267 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
268 | } |
269 | ||
021b65bb TT |
270 | void ext4_free_group_clusters_set(struct super_block *sb, |
271 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
272 | { |
273 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
274 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
275 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
276 | } | |
277 | ||
278 | void ext4_free_inodes_set(struct super_block *sb, | |
279 | struct ext4_group_desc *bg, __u32 count) | |
280 | { | |
281 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
282 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
283 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
284 | } | |
285 | ||
286 | void ext4_used_dirs_set(struct super_block *sb, | |
287 | struct ext4_group_desc *bg, __u32 count) | |
288 | { | |
289 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
290 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
291 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
292 | } | |
293 | ||
294 | void ext4_itable_unused_set(struct super_block *sb, | |
295 | struct ext4_group_desc *bg, __u32 count) | |
296 | { | |
297 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
298 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
299 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
300 | } | |
301 | ||
d3d1faf6 | 302 | |
1c13d5c0 TT |
303 | static void __save_error_info(struct super_block *sb, const char *func, |
304 | unsigned int line) | |
305 | { | |
306 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
307 | ||
308 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
309 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
310 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
311 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
312 | es->s_last_error_line = cpu_to_le32(line); | |
313 | if (!es->s_first_error_time) { | |
314 | es->s_first_error_time = es->s_last_error_time; | |
315 | strncpy(es->s_first_error_func, func, | |
316 | sizeof(es->s_first_error_func)); | |
317 | es->s_first_error_line = cpu_to_le32(line); | |
318 | es->s_first_error_ino = es->s_last_error_ino; | |
319 | es->s_first_error_block = es->s_last_error_block; | |
320 | } | |
66e61a9e TT |
321 | /* |
322 | * Start the daily error reporting function if it hasn't been | |
323 | * started already | |
324 | */ | |
325 | if (!es->s_error_count) | |
326 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 327 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
328 | } |
329 | ||
330 | static void save_error_info(struct super_block *sb, const char *func, | |
331 | unsigned int line) | |
332 | { | |
333 | __save_error_info(sb, func, line); | |
334 | ext4_commit_super(sb, 1); | |
335 | } | |
336 | ||
7c2e7087 TT |
337 | /* |
338 | * The del_gendisk() function uninitializes the disk-specific data | |
339 | * structures, including the bdi structure, without telling anyone | |
340 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
341 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
342 | * This is a kludge to prevent these oops until we can put in a proper | |
343 | * hook in del_gendisk() to inform the VFS and file system layers. | |
344 | */ | |
345 | static int block_device_ejected(struct super_block *sb) | |
346 | { | |
347 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
348 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; | |
349 | ||
350 | return bdi->dev == NULL; | |
351 | } | |
352 | ||
18aadd47 BJ |
353 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
354 | { | |
355 | struct super_block *sb = journal->j_private; | |
356 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
357 | int error = is_journal_aborted(journal); | |
5d3ee208 | 358 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 359 | |
5d3ee208 | 360 | BUG_ON(txn->t_state == T_FINISHED); |
18aadd47 | 361 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
362 | while (!list_empty(&txn->t_private_list)) { |
363 | jce = list_entry(txn->t_private_list.next, | |
364 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
365 | list_del_init(&jce->jce_list); |
366 | spin_unlock(&sbi->s_md_lock); | |
367 | jce->jce_func(sb, jce, error); | |
368 | spin_lock(&sbi->s_md_lock); | |
369 | } | |
370 | spin_unlock(&sbi->s_md_lock); | |
371 | } | |
1c13d5c0 | 372 | |
ac27a0ec DK |
373 | /* Deal with the reporting of failure conditions on a filesystem such as |
374 | * inconsistencies detected or read IO failures. | |
375 | * | |
376 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 377 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
378 | * write ordering constraints on the superblock which prevent us from |
379 | * writing it out straight away; and given that the journal is about to | |
380 | * be aborted, we can't rely on the current, or future, transactions to | |
381 | * write out the superblock safely. | |
382 | * | |
dab291af | 383 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 384 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
385 | * that error until we've noted it down and cleared it. |
386 | */ | |
387 | ||
617ba13b | 388 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 389 | { |
ac27a0ec DK |
390 | if (sb->s_flags & MS_RDONLY) |
391 | return; | |
392 | ||
2b2d6d01 | 393 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 394 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 395 | |
4ab2f15b | 396 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 397 | if (journal) |
dab291af | 398 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 399 | } |
2b2d6d01 | 400 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 401 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
4418e141 DM |
402 | /* |
403 | * Make sure updated value of ->s_mount_flags will be visible | |
404 | * before ->s_flags update | |
405 | */ | |
406 | smp_wmb(); | |
ac27a0ec DK |
407 | sb->s_flags |= MS_RDONLY; |
408 | } | |
ac27a0ec | 409 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 410 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
411 | sb->s_id); |
412 | } | |
413 | ||
12062ddd | 414 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 415 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 416 | { |
0ff2ea7d | 417 | struct va_format vaf; |
ac27a0ec DK |
418 | va_list args; |
419 | ||
420 | va_start(args, fmt); | |
0ff2ea7d JP |
421 | vaf.fmt = fmt; |
422 | vaf.va = &args; | |
423 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
424 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec | 425 | va_end(args); |
f3fc0210 | 426 | save_error_info(sb, function, line); |
ac27a0ec | 427 | |
617ba13b | 428 | ext4_handle_error(sb); |
ac27a0ec DK |
429 | } |
430 | ||
e7c96e8e JP |
431 | void __ext4_error_inode(struct inode *inode, const char *function, |
432 | unsigned int line, ext4_fsblk_t block, | |
433 | const char *fmt, ...) | |
273df556 FM |
434 | { |
435 | va_list args; | |
f7c21177 | 436 | struct va_format vaf; |
1c13d5c0 | 437 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 438 | |
1c13d5c0 TT |
439 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
440 | es->s_last_error_block = cpu_to_le64(block); | |
441 | save_error_info(inode->i_sb, function, line); | |
273df556 | 442 | va_start(args, fmt); |
f7c21177 TT |
443 | vaf.fmt = fmt; |
444 | vaf.va = &args; | |
c398eda0 | 445 | if (block) |
d9ee81da JP |
446 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
447 | "inode #%lu: block %llu: comm %s: %pV\n", | |
448 | inode->i_sb->s_id, function, line, inode->i_ino, | |
449 | block, current->comm, &vaf); | |
450 | else | |
451 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
452 | "inode #%lu: comm %s: %pV\n", | |
453 | inode->i_sb->s_id, function, line, inode->i_ino, | |
454 | current->comm, &vaf); | |
273df556 FM |
455 | va_end(args); |
456 | ||
457 | ext4_handle_error(inode->i_sb); | |
458 | } | |
459 | ||
e7c96e8e JP |
460 | void __ext4_error_file(struct file *file, const char *function, |
461 | unsigned int line, ext4_fsblk_t block, | |
462 | const char *fmt, ...) | |
273df556 FM |
463 | { |
464 | va_list args; | |
f7c21177 | 465 | struct va_format vaf; |
1c13d5c0 | 466 | struct ext4_super_block *es; |
496ad9aa | 467 | struct inode *inode = file_inode(file); |
273df556 FM |
468 | char pathname[80], *path; |
469 | ||
1c13d5c0 TT |
470 | es = EXT4_SB(inode->i_sb)->s_es; |
471 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
472 | save_error_info(inode->i_sb, function, line); | |
273df556 | 473 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 474 | if (IS_ERR(path)) |
273df556 | 475 | path = "(unknown)"; |
f7c21177 TT |
476 | va_start(args, fmt); |
477 | vaf.fmt = fmt; | |
478 | vaf.va = &args; | |
d9ee81da JP |
479 | if (block) |
480 | printk(KERN_CRIT | |
481 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
482 | "block %llu: comm %s: path %s: %pV\n", | |
483 | inode->i_sb->s_id, function, line, inode->i_ino, | |
484 | block, current->comm, path, &vaf); | |
485 | else | |
486 | printk(KERN_CRIT | |
487 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
488 | "comm %s: path %s: %pV\n", | |
489 | inode->i_sb->s_id, function, line, inode->i_ino, | |
490 | current->comm, path, &vaf); | |
273df556 FM |
491 | va_end(args); |
492 | ||
493 | ext4_handle_error(inode->i_sb); | |
494 | } | |
495 | ||
722887dd TT |
496 | const char *ext4_decode_error(struct super_block *sb, int errno, |
497 | char nbuf[16]) | |
ac27a0ec DK |
498 | { |
499 | char *errstr = NULL; | |
500 | ||
501 | switch (errno) { | |
502 | case -EIO: | |
503 | errstr = "IO failure"; | |
504 | break; | |
505 | case -ENOMEM: | |
506 | errstr = "Out of memory"; | |
507 | break; | |
508 | case -EROFS: | |
78f1ddbb TT |
509 | if (!sb || (EXT4_SB(sb)->s_journal && |
510 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
511 | errstr = "Journal has aborted"; |
512 | else | |
513 | errstr = "Readonly filesystem"; | |
514 | break; | |
515 | default: | |
516 | /* If the caller passed in an extra buffer for unknown | |
517 | * errors, textualise them now. Else we just return | |
518 | * NULL. */ | |
519 | if (nbuf) { | |
520 | /* Check for truncated error codes... */ | |
521 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
522 | errstr = nbuf; | |
523 | } | |
524 | break; | |
525 | } | |
526 | ||
527 | return errstr; | |
528 | } | |
529 | ||
617ba13b | 530 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
531 | * automatically and invokes the appropriate error response. */ |
532 | ||
c398eda0 TT |
533 | void __ext4_std_error(struct super_block *sb, const char *function, |
534 | unsigned int line, int errno) | |
ac27a0ec DK |
535 | { |
536 | char nbuf[16]; | |
537 | const char *errstr; | |
538 | ||
539 | /* Special case: if the error is EROFS, and we're not already | |
540 | * inside a transaction, then there's really no point in logging | |
541 | * an error. */ | |
542 | if (errno == -EROFS && journal_current_handle() == NULL && | |
543 | (sb->s_flags & MS_RDONLY)) | |
544 | return; | |
545 | ||
617ba13b | 546 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
547 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
548 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 549 | save_error_info(sb, function, line); |
ac27a0ec | 550 | |
617ba13b | 551 | ext4_handle_error(sb); |
ac27a0ec DK |
552 | } |
553 | ||
554 | /* | |
617ba13b | 555 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
556 | * abort function may be used to deal with unrecoverable failures such |
557 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
558 | * | |
559 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
560 | * unless the error response on the fs has been set to panic in which | |
561 | * case we take the easy way out and panic immediately. | |
562 | */ | |
563 | ||
c67d859e | 564 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 565 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
566 | { |
567 | va_list args; | |
568 | ||
1c13d5c0 | 569 | save_error_info(sb, function, line); |
ac27a0ec | 570 | va_start(args, fmt); |
c398eda0 TT |
571 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
572 | function, line); | |
ac27a0ec DK |
573 | vprintk(fmt, args); |
574 | printk("\n"); | |
575 | va_end(args); | |
576 | ||
1c13d5c0 TT |
577 | if ((sb->s_flags & MS_RDONLY) == 0) { |
578 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
1c13d5c0 | 579 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
4418e141 DM |
580 | /* |
581 | * Make sure updated value of ->s_mount_flags will be visible | |
582 | * before ->s_flags update | |
583 | */ | |
584 | smp_wmb(); | |
585 | sb->s_flags |= MS_RDONLY; | |
1c13d5c0 TT |
586 | if (EXT4_SB(sb)->s_journal) |
587 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
588 | save_error_info(sb, function, line); | |
589 | } | |
ac27a0ec | 590 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 591 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
592 | } |
593 | ||
e7c96e8e JP |
594 | void __ext4_msg(struct super_block *sb, |
595 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 596 | { |
0ff2ea7d | 597 | struct va_format vaf; |
b31e1552 ES |
598 | va_list args; |
599 | ||
600 | va_start(args, fmt); | |
0ff2ea7d JP |
601 | vaf.fmt = fmt; |
602 | vaf.va = &args; | |
603 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
604 | va_end(args); |
605 | } | |
606 | ||
12062ddd | 607 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 608 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 609 | { |
0ff2ea7d | 610 | struct va_format vaf; |
ac27a0ec DK |
611 | va_list args; |
612 | ||
613 | va_start(args, fmt); | |
0ff2ea7d JP |
614 | vaf.fmt = fmt; |
615 | vaf.va = &args; | |
616 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
617 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
618 | va_end(args); |
619 | } | |
620 | ||
e29136f8 TT |
621 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
622 | struct super_block *sb, ext4_group_t grp, | |
623 | unsigned long ino, ext4_fsblk_t block, | |
624 | const char *fmt, ...) | |
5d1b1b3f AK |
625 | __releases(bitlock) |
626 | __acquires(bitlock) | |
627 | { | |
0ff2ea7d | 628 | struct va_format vaf; |
5d1b1b3f AK |
629 | va_list args; |
630 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
631 | ||
1c13d5c0 TT |
632 | es->s_last_error_ino = cpu_to_le32(ino); |
633 | es->s_last_error_block = cpu_to_le64(block); | |
634 | __save_error_info(sb, function, line); | |
0ff2ea7d | 635 | |
5d1b1b3f | 636 | va_start(args, fmt); |
0ff2ea7d JP |
637 | |
638 | vaf.fmt = fmt; | |
639 | vaf.va = &args; | |
21149d61 | 640 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
641 | sb->s_id, function, line, grp); |
642 | if (ino) | |
0ff2ea7d | 643 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 644 | if (block) |
0ff2ea7d JP |
645 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
646 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
647 | va_end(args); |
648 | ||
649 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 650 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
651 | return; |
652 | } | |
1c13d5c0 | 653 | |
5d1b1b3f AK |
654 | ext4_unlock_group(sb, grp); |
655 | ext4_handle_error(sb); | |
656 | /* | |
657 | * We only get here in the ERRORS_RO case; relocking the group | |
658 | * may be dangerous, but nothing bad will happen since the | |
659 | * filesystem will have already been marked read/only and the | |
660 | * journal has been aborted. We return 1 as a hint to callers | |
661 | * who might what to use the return value from | |
25985edc | 662 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
663 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
664 | * aggressively from the ext4 function in question, with a | |
665 | * more appropriate error code. | |
666 | */ | |
667 | ext4_lock_group(sb, grp); | |
668 | return; | |
669 | } | |
670 | ||
617ba13b | 671 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 672 | { |
617ba13b | 673 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 674 | |
617ba13b | 675 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
676 | return; |
677 | ||
12062ddd | 678 | ext4_warning(sb, |
ac27a0ec DK |
679 | "updating to rev %d because of new feature flag, " |
680 | "running e2fsck is recommended", | |
617ba13b | 681 | EXT4_DYNAMIC_REV); |
ac27a0ec | 682 | |
617ba13b MC |
683 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
684 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
685 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
686 | /* leave es->s_feature_*compat flags alone */ |
687 | /* es->s_uuid will be set by e2fsck if empty */ | |
688 | ||
689 | /* | |
690 | * The rest of the superblock fields should be zero, and if not it | |
691 | * means they are likely already in use, so leave them alone. We | |
692 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
693 | */ | |
694 | } | |
695 | ||
696 | /* | |
697 | * Open the external journal device | |
698 | */ | |
b31e1552 | 699 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
700 | { |
701 | struct block_device *bdev; | |
702 | char b[BDEVNAME_SIZE]; | |
703 | ||
d4d77629 | 704 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
705 | if (IS_ERR(bdev)) |
706 | goto fail; | |
707 | return bdev; | |
708 | ||
709 | fail: | |
b31e1552 | 710 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
711 | __bdevname(dev, b), PTR_ERR(bdev)); |
712 | return NULL; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Release the journal device | |
717 | */ | |
4385bab1 | 718 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 719 | { |
4385bab1 | 720 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
721 | } |
722 | ||
4385bab1 | 723 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
724 | { |
725 | struct block_device *bdev; | |
ac27a0ec DK |
726 | bdev = sbi->journal_bdev; |
727 | if (bdev) { | |
4385bab1 | 728 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
729 | sbi->journal_bdev = NULL; |
730 | } | |
ac27a0ec DK |
731 | } |
732 | ||
733 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
734 | { | |
617ba13b | 735 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
736 | } |
737 | ||
617ba13b | 738 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
739 | { |
740 | struct list_head *l; | |
741 | ||
b31e1552 ES |
742 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
743 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
744 | |
745 | printk(KERN_ERR "sb_info orphan list:\n"); | |
746 | list_for_each(l, &sbi->s_orphan) { | |
747 | struct inode *inode = orphan_list_entry(l); | |
748 | printk(KERN_ERR " " | |
749 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
750 | inode->i_sb->s_id, inode->i_ino, inode, | |
751 | inode->i_mode, inode->i_nlink, | |
752 | NEXT_ORPHAN(inode)); | |
753 | } | |
754 | } | |
755 | ||
2b2d6d01 | 756 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 757 | { |
617ba13b MC |
758 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
759 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 760 | int i, err; |
ac27a0ec | 761 | |
857ac889 | 762 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
763 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
764 | ||
2e8fa54e | 765 | flush_workqueue(sbi->rsv_conversion_wq); |
2e8fa54e | 766 | destroy_workqueue(sbi->rsv_conversion_wq); |
4c0425ff | 767 | |
0390131b FM |
768 | if (sbi->s_journal) { |
769 | err = jbd2_journal_destroy(sbi->s_journal); | |
770 | sbi->s_journal = NULL; | |
771 | if (err < 0) | |
c67d859e | 772 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 773 | } |
d4edac31 | 774 | |
d3922a77 | 775 | ext4_es_unregister_shrinker(sbi); |
a1c6c569 | 776 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
777 | ext4_release_system_zone(sb); |
778 | ext4_mb_release(sb); | |
779 | ext4_ext_release(sb); | |
780 | ext4_xattr_put_super(sb); | |
781 | ||
ac27a0ec | 782 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 783 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 784 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 785 | } |
58c5873a | 786 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
787 | ext4_commit_super(sb, 1); |
788 | ||
240799cd | 789 | if (sbi->s_proc) { |
66acdcf4 | 790 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 791 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 792 | } |
3197ebdb | 793 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
794 | |
795 | for (i = 0; i < sbi->s_gdb_count; i++) | |
796 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 797 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 798 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 799 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
800 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
801 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 802 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
1ac6466f | 803 | percpu_counter_destroy(&sbi->s_extent_cache_cnt); |
ac27a0ec DK |
804 | brelse(sbi->s_sbh); |
805 | #ifdef CONFIG_QUOTA | |
806 | for (i = 0; i < MAXQUOTAS; i++) | |
807 | kfree(sbi->s_qf_names[i]); | |
808 | #endif | |
809 | ||
810 | /* Debugging code just in case the in-memory inode orphan list | |
811 | * isn't empty. The on-disk one can be non-empty if we've | |
812 | * detected an error and taken the fs readonly, but the | |
813 | * in-memory list had better be clean by this point. */ | |
814 | if (!list_empty(&sbi->s_orphan)) | |
815 | dump_orphan_list(sb, sbi); | |
816 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
817 | ||
f98393a6 | 818 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
819 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
820 | /* | |
821 | * Invalidate the journal device's buffers. We don't want them | |
822 | * floating about in memory - the physical journal device may | |
823 | * hotswapped, and it breaks the `ro-after' testing code. | |
824 | */ | |
825 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 826 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 827 | ext4_blkdev_remove(sbi); |
ac27a0ec | 828 | } |
c5e06d10 JL |
829 | if (sbi->s_mmp_tsk) |
830 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 831 | sb->s_fs_info = NULL; |
3197ebdb TT |
832 | /* |
833 | * Now that we are completely done shutting down the | |
834 | * superblock, we need to actually destroy the kobject. | |
835 | */ | |
3197ebdb TT |
836 | kobject_put(&sbi->s_kobj); |
837 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
838 | if (sbi->s_chksum_driver) |
839 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 840 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 841 | kfree(sbi); |
ac27a0ec DK |
842 | } |
843 | ||
e18b890b | 844 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
845 | |
846 | /* | |
847 | * Called inside transaction, so use GFP_NOFS | |
848 | */ | |
617ba13b | 849 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 850 | { |
617ba13b | 851 | struct ext4_inode_info *ei; |
ac27a0ec | 852 | |
e6b4f8da | 853 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
854 | if (!ei) |
855 | return NULL; | |
0b8e58a1 | 856 | |
ac27a0ec | 857 | ei->vfs_inode.i_version = 1; |
c9de560d AT |
858 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
859 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
860 | ext4_es_init_tree(&ei->i_es_tree); |
861 | rwlock_init(&ei->i_es_lock); | |
74cd15cd ZL |
862 | INIT_LIST_HEAD(&ei->i_es_lru); |
863 | ei->i_es_lru_nr = 0; | |
d3922a77 | 864 | ei->i_touch_when = 0; |
d2a17637 MC |
865 | ei->i_reserved_data_blocks = 0; |
866 | ei->i_reserved_meta_blocks = 0; | |
867 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 868 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 869 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 870 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
871 | #ifdef CONFIG_QUOTA |
872 | ei->i_reserved_quota = 0; | |
873 | #endif | |
8aefcd55 | 874 | ei->jinode = NULL; |
2e8fa54e | 875 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 876 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
877 | ei->i_sync_tid = 0; |
878 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 879 | atomic_set(&ei->i_ioend_count, 0); |
e27f41e1 | 880 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 881 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
0b8e58a1 | 882 | |
ac27a0ec DK |
883 | return &ei->vfs_inode; |
884 | } | |
885 | ||
7ff9c073 TT |
886 | static int ext4_drop_inode(struct inode *inode) |
887 | { | |
888 | int drop = generic_drop_inode(inode); | |
889 | ||
890 | trace_ext4_drop_inode(inode, drop); | |
891 | return drop; | |
892 | } | |
893 | ||
fa0d7e3d NP |
894 | static void ext4_i_callback(struct rcu_head *head) |
895 | { | |
896 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
897 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
898 | } | |
899 | ||
617ba13b | 900 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 901 | { |
9f7dd93d | 902 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
903 | ext4_msg(inode->i_sb, KERN_ERR, |
904 | "Inode %lu (%p): orphan list check failed!", | |
905 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
906 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
907 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
908 | true); | |
909 | dump_stack(); | |
910 | } | |
fa0d7e3d | 911 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
912 | } |
913 | ||
51cc5068 | 914 | static void init_once(void *foo) |
ac27a0ec | 915 | { |
617ba13b | 916 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 917 | |
a35afb83 | 918 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 919 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 920 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 921 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
922 | } |
923 | ||
924 | static int init_inodecache(void) | |
925 | { | |
617ba13b MC |
926 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
927 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
928 | 0, (SLAB_RECLAIM_ACCOUNT| |
929 | SLAB_MEM_SPREAD), | |
20c2df83 | 930 | init_once); |
617ba13b | 931 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
932 | return -ENOMEM; |
933 | return 0; | |
934 | } | |
935 | ||
936 | static void destroy_inodecache(void) | |
937 | { | |
8c0a8537 KS |
938 | /* |
939 | * Make sure all delayed rcu free inodes are flushed before we | |
940 | * destroy cache. | |
941 | */ | |
942 | rcu_barrier(); | |
617ba13b | 943 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
944 | } |
945 | ||
0930fcc1 | 946 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 947 | { |
0930fcc1 | 948 | invalidate_inode_buffers(inode); |
dbd5768f | 949 | clear_inode(inode); |
9f754758 | 950 | dquot_drop(inode); |
c2ea3fde | 951 | ext4_discard_preallocations(inode); |
51865fda | 952 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
74cd15cd | 953 | ext4_es_lru_del(inode); |
8aefcd55 TT |
954 | if (EXT4_I(inode)->jinode) { |
955 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
956 | EXT4_I(inode)->jinode); | |
957 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
958 | EXT4_I(inode)->jinode = NULL; | |
959 | } | |
ac27a0ec DK |
960 | } |
961 | ||
1b961ac0 | 962 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 963 | u64 ino, u32 generation) |
ac27a0ec | 964 | { |
ac27a0ec | 965 | struct inode *inode; |
ac27a0ec | 966 | |
617ba13b | 967 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 968 | return ERR_PTR(-ESTALE); |
617ba13b | 969 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
970 | return ERR_PTR(-ESTALE); |
971 | ||
972 | /* iget isn't really right if the inode is currently unallocated!! | |
973 | * | |
617ba13b | 974 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
975 | * deleted, so we should be safe. |
976 | * | |
977 | * Currently we don't know the generation for parent directory, so | |
978 | * a generation of 0 means "accept any" | |
979 | */ | |
1d1fe1ee DH |
980 | inode = ext4_iget(sb, ino); |
981 | if (IS_ERR(inode)) | |
982 | return ERR_CAST(inode); | |
983 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
984 | iput(inode); |
985 | return ERR_PTR(-ESTALE); | |
986 | } | |
1b961ac0 CH |
987 | |
988 | return inode; | |
989 | } | |
990 | ||
991 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 992 | int fh_len, int fh_type) |
1b961ac0 CH |
993 | { |
994 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
995 | ext4_nfs_get_inode); | |
996 | } | |
997 | ||
998 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 999 | int fh_len, int fh_type) |
1b961ac0 CH |
1000 | { |
1001 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1002 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1003 | } |
1004 | ||
c39a7f84 TO |
1005 | /* |
1006 | * Try to release metadata pages (indirect blocks, directories) which are | |
1007 | * mapped via the block device. Since these pages could have journal heads | |
1008 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1009 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1010 | */ | |
0b8e58a1 AD |
1011 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1012 | gfp_t wait) | |
c39a7f84 TO |
1013 | { |
1014 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1015 | ||
1016 | WARN_ON(PageChecked(page)); | |
1017 | if (!page_has_buffers(page)) | |
1018 | return 0; | |
1019 | if (journal) | |
1020 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1021 | wait & ~__GFP_WAIT); | |
1022 | return try_to_free_buffers(page); | |
1023 | } | |
1024 | ||
ac27a0ec | 1025 | #ifdef CONFIG_QUOTA |
af5bc92d | 1026 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1027 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1028 | |
617ba13b MC |
1029 | static int ext4_write_dquot(struct dquot *dquot); |
1030 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1031 | static int ext4_release_dquot(struct dquot *dquot); | |
1032 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1033 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1034 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1035 | struct path *path); |
7c319d32 AK |
1036 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, |
1037 | int format_id); | |
ca0e05e4 | 1038 | static int ext4_quota_off(struct super_block *sb, int type); |
7c319d32 | 1039 | static int ext4_quota_off_sysfile(struct super_block *sb, int type); |
617ba13b MC |
1040 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1041 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1042 | size_t len, loff_t off); |
617ba13b | 1043 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1044 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1045 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1046 | unsigned int flags); | |
1047 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1048 | |
61e225dc | 1049 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1050 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1051 | .write_dquot = ext4_write_dquot, |
1052 | .acquire_dquot = ext4_acquire_dquot, | |
1053 | .release_dquot = ext4_release_dquot, | |
1054 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1055 | .write_info = ext4_write_info, |
1056 | .alloc_dquot = dquot_alloc, | |
1057 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1058 | }; |
1059 | ||
0d54b217 | 1060 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1061 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1062 | .quota_off = ext4_quota_off, |
287a8095 CH |
1063 | .quota_sync = dquot_quota_sync, |
1064 | .get_info = dquot_get_dqinfo, | |
1065 | .set_info = dquot_set_dqinfo, | |
1066 | .get_dqblk = dquot_get_dqblk, | |
1067 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec | 1068 | }; |
7c319d32 AK |
1069 | |
1070 | static const struct quotactl_ops ext4_qctl_sysfile_operations = { | |
1071 | .quota_on_meta = ext4_quota_on_sysfile, | |
1072 | .quota_off = ext4_quota_off_sysfile, | |
1073 | .quota_sync = dquot_quota_sync, | |
1074 | .get_info = dquot_get_dqinfo, | |
1075 | .set_info = dquot_set_dqinfo, | |
1076 | .get_dqblk = dquot_get_dqblk, | |
1077 | .set_dqblk = dquot_set_dqblk | |
1078 | }; | |
ac27a0ec DK |
1079 | #endif |
1080 | ||
ee9b6d61 | 1081 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1082 | .alloc_inode = ext4_alloc_inode, |
1083 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1084 | .write_inode = ext4_write_inode, |
1085 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1086 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1087 | .evict_inode = ext4_evict_inode, |
617ba13b | 1088 | .put_super = ext4_put_super, |
617ba13b | 1089 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1090 | .freeze_fs = ext4_freeze, |
1091 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1092 | .statfs = ext4_statfs, |
1093 | .remount_fs = ext4_remount, | |
617ba13b | 1094 | .show_options = ext4_show_options, |
ac27a0ec | 1095 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1096 | .quota_read = ext4_quota_read, |
1097 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1098 | #endif |
c39a7f84 | 1099 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1100 | }; |
1101 | ||
9ca92389 TT |
1102 | static const struct super_operations ext4_nojournal_sops = { |
1103 | .alloc_inode = ext4_alloc_inode, | |
1104 | .destroy_inode = ext4_destroy_inode, | |
1105 | .write_inode = ext4_write_inode, | |
1106 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1107 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1108 | .evict_inode = ext4_evict_inode, |
06a407f1 | 1109 | .sync_fs = ext4_sync_fs_nojournal, |
9ca92389 TT |
1110 | .put_super = ext4_put_super, |
1111 | .statfs = ext4_statfs, | |
1112 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1113 | .show_options = ext4_show_options, |
1114 | #ifdef CONFIG_QUOTA | |
1115 | .quota_read = ext4_quota_read, | |
1116 | .quota_write = ext4_quota_write, | |
1117 | #endif | |
1118 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1119 | }; | |
1120 | ||
39655164 | 1121 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1122 | .fh_to_dentry = ext4_fh_to_dentry, |
1123 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1124 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1125 | }; |
1126 | ||
1127 | enum { | |
1128 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1129 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1130 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1131 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1132 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1133 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1134 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1135 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1136 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1137 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1138 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1139 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
661aa520 | 1140 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
1449032b TT |
1141 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1142 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1143 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1144 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1145 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
df981d03 | 1146 | Opt_max_dir_size_kb, |
ac27a0ec DK |
1147 | }; |
1148 | ||
a447c093 | 1149 | static const match_table_t tokens = { |
ac27a0ec DK |
1150 | {Opt_bsd_df, "bsddf"}, |
1151 | {Opt_minix_df, "minixdf"}, | |
1152 | {Opt_grpid, "grpid"}, | |
1153 | {Opt_grpid, "bsdgroups"}, | |
1154 | {Opt_nogrpid, "nogrpid"}, | |
1155 | {Opt_nogrpid, "sysvgroups"}, | |
1156 | {Opt_resgid, "resgid=%u"}, | |
1157 | {Opt_resuid, "resuid=%u"}, | |
1158 | {Opt_sb, "sb=%u"}, | |
1159 | {Opt_err_cont, "errors=continue"}, | |
1160 | {Opt_err_panic, "errors=panic"}, | |
1161 | {Opt_err_ro, "errors=remount-ro"}, | |
1162 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1163 | {Opt_debug, "debug"}, |
72578c33 TT |
1164 | {Opt_removed, "oldalloc"}, |
1165 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1166 | {Opt_user_xattr, "user_xattr"}, |
1167 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1168 | {Opt_acl, "acl"}, | |
1169 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1170 | {Opt_noload, "norecovery"}, |
5a916be1 | 1171 | {Opt_noload, "noload"}, |
72578c33 TT |
1172 | {Opt_removed, "nobh"}, |
1173 | {Opt_removed, "bh"}, | |
ac27a0ec | 1174 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1175 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1176 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1177 | {Opt_journal_dev, "journal_dev=%u"}, |
ad4eec61 | 1178 | {Opt_journal_path, "journal_path=%s"}, |
818d276c GS |
1179 | {Opt_journal_checksum, "journal_checksum"}, |
1180 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1181 | {Opt_abort, "abort"}, |
1182 | {Opt_data_journal, "data=journal"}, | |
1183 | {Opt_data_ordered, "data=ordered"}, | |
1184 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1185 | {Opt_data_err_abort, "data_err=abort"}, |
1186 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1187 | {Opt_offusrjquota, "usrjquota="}, |
1188 | {Opt_usrjquota, "usrjquota=%s"}, | |
1189 | {Opt_offgrpjquota, "grpjquota="}, | |
1190 | {Opt_grpjquota, "grpjquota=%s"}, | |
1191 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1192 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1193 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1194 | {Opt_grpquota, "grpquota"}, |
1195 | {Opt_noquota, "noquota"}, | |
1196 | {Opt_quota, "quota"}, | |
1197 | {Opt_usrquota, "usrquota"}, | |
1198 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1199 | {Opt_barrier, "barrier"}, |
1200 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1201 | {Opt_i_version, "i_version"}, |
c9de560d | 1202 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1203 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1204 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1205 | {Opt_removed, "mblk_io_submit"}, |
1206 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1207 | {Opt_block_validity, "block_validity"}, |
1208 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1209 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1210 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1211 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1212 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1213 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1214 | {Opt_dioread_nolock, "dioread_nolock"}, |
1215 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1216 | {Opt_discard, "discard"}, |
1217 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1218 | {Opt_init_itable, "init_itable=%u"}, |
1219 | {Opt_init_itable, "init_itable"}, | |
1220 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1221 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
c7198b9c TT |
1222 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1223 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1224 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1225 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1226 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1227 | {Opt_err, NULL}, |
ac27a0ec DK |
1228 | }; |
1229 | ||
617ba13b | 1230 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1231 | { |
617ba13b | 1232 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1233 | char *options = (char *) *data; |
1234 | ||
1235 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1236 | return 1; /* Default location */ | |
0b8e58a1 | 1237 | |
ac27a0ec | 1238 | options += 3; |
0b8e58a1 | 1239 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1240 | sb_block = simple_strtoul(options, &options, 0); |
1241 | if (*options && *options != ',') { | |
4776004f | 1242 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1243 | (char *) *data); |
1244 | return 1; | |
1245 | } | |
1246 | if (*options == ',') | |
1247 | options++; | |
1248 | *data = (void *) options; | |
0b8e58a1 | 1249 | |
ac27a0ec DK |
1250 | return sb_block; |
1251 | } | |
1252 | ||
b3881f74 | 1253 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1254 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1255 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1256 | |
56c50f11 DM |
1257 | #ifdef CONFIG_QUOTA |
1258 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1259 | { | |
1260 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1261 | char *qname; | |
03dafb5f | 1262 | int ret = -1; |
56c50f11 DM |
1263 | |
1264 | if (sb_any_quota_loaded(sb) && | |
1265 | !sbi->s_qf_names[qtype]) { | |
1266 | ext4_msg(sb, KERN_ERR, | |
1267 | "Cannot change journaled " | |
1268 | "quota options when quota turned on"); | |
57f73c2c | 1269 | return -1; |
56c50f11 | 1270 | } |
262b4662 JK |
1271 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
1272 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " | |
1273 | "when QUOTA feature is enabled"); | |
1274 | return -1; | |
1275 | } | |
56c50f11 DM |
1276 | qname = match_strdup(args); |
1277 | if (!qname) { | |
1278 | ext4_msg(sb, KERN_ERR, | |
1279 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1280 | return -1; |
56c50f11 | 1281 | } |
03dafb5f CG |
1282 | if (sbi->s_qf_names[qtype]) { |
1283 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1284 | ret = 1; | |
1285 | else | |
1286 | ext4_msg(sb, KERN_ERR, | |
1287 | "%s quota file already specified", | |
1288 | QTYPE2NAME(qtype)); | |
1289 | goto errout; | |
56c50f11 | 1290 | } |
03dafb5f | 1291 | if (strchr(qname, '/')) { |
56c50f11 DM |
1292 | ext4_msg(sb, KERN_ERR, |
1293 | "quotafile must be on filesystem root"); | |
03dafb5f | 1294 | goto errout; |
56c50f11 | 1295 | } |
03dafb5f | 1296 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1297 | set_opt(sb, QUOTA); |
56c50f11 | 1298 | return 1; |
03dafb5f CG |
1299 | errout: |
1300 | kfree(qname); | |
1301 | return ret; | |
56c50f11 DM |
1302 | } |
1303 | ||
1304 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1305 | { | |
1306 | ||
1307 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1308 | ||
1309 | if (sb_any_quota_loaded(sb) && | |
1310 | sbi->s_qf_names[qtype]) { | |
1311 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1312 | " when quota turned on"); | |
57f73c2c | 1313 | return -1; |
56c50f11 | 1314 | } |
03dafb5f | 1315 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1316 | sbi->s_qf_names[qtype] = NULL; |
1317 | return 1; | |
1318 | } | |
1319 | #endif | |
1320 | ||
26092bf5 TT |
1321 | #define MOPT_SET 0x0001 |
1322 | #define MOPT_CLEAR 0x0002 | |
1323 | #define MOPT_NOSUPPORT 0x0004 | |
1324 | #define MOPT_EXPLICIT 0x0008 | |
1325 | #define MOPT_CLEAR_ERR 0x0010 | |
1326 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1327 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1328 | #define MOPT_Q 0 |
1329 | #define MOPT_QFMT 0x0040 | |
1330 | #else | |
1331 | #define MOPT_Q MOPT_NOSUPPORT | |
1332 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1333 | #endif |
26092bf5 | 1334 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1335 | #define MOPT_NO_EXT2 0x0100 |
1336 | #define MOPT_NO_EXT3 0x0200 | |
1337 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
ad4eec61 | 1338 | #define MOPT_STRING 0x0400 |
26092bf5 TT |
1339 | |
1340 | static const struct mount_opts { | |
1341 | int token; | |
1342 | int mount_opt; | |
1343 | int flags; | |
1344 | } ext4_mount_opts[] = { | |
1345 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1346 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1347 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1348 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1349 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1350 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1351 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1352 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1353 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1354 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1355 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1356 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1357 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1358 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1359 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1360 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
8dc0aa8c TT |
1361 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1362 | MOPT_EXT4_ONLY | MOPT_SET}, | |
26092bf5 | 1363 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c TT |
1364 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1365 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1366 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, | |
26092bf5 TT |
1367 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1368 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1369 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c TT |
1370 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
1371 | MOPT_NO_EXT2 | MOPT_SET}, | |
1372 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, | |
1373 | MOPT_NO_EXT2 | MOPT_CLEAR}, | |
26092bf5 TT |
1374 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1375 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1376 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1377 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1378 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1379 | {Opt_commit, 0, MOPT_GTE0}, | |
1380 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1381 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1382 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1383 | {Opt_init_itable, 0, MOPT_GTE0}, | |
1384 | {Opt_stripe, 0, MOPT_GTE0}, | |
0efb3b23 JK |
1385 | {Opt_resuid, 0, MOPT_GTE0}, |
1386 | {Opt_resgid, 0, MOPT_GTE0}, | |
1387 | {Opt_journal_dev, 0, MOPT_GTE0}, | |
ad4eec61 | 1388 | {Opt_journal_path, 0, MOPT_STRING}, |
0efb3b23 | 1389 | {Opt_journal_ioprio, 0, MOPT_GTE0}, |
8dc0aa8c TT |
1390 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1391 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1392 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1393 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1394 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1395 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1396 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1397 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1398 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1399 | #else |
26092bf5 TT |
1400 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1401 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1402 | #endif |
26092bf5 TT |
1403 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1404 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1405 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1406 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1407 | MOPT_SET | MOPT_Q}, | |
1408 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1409 | MOPT_SET | MOPT_Q}, | |
1410 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1411 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1412 | {Opt_usrjquota, 0, MOPT_Q}, | |
1413 | {Opt_grpjquota, 0, MOPT_Q}, | |
1414 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1415 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1416 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1417 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1418 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1419 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
26092bf5 TT |
1420 | {Opt_err, 0, 0} |
1421 | }; | |
1422 | ||
1423 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1424 | substring_t *args, unsigned long *journal_devnum, | |
1425 | unsigned int *journal_ioprio, int is_remount) | |
1426 | { | |
1427 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1428 | const struct mount_opts *m; | |
08cefc7a EB |
1429 | kuid_t uid; |
1430 | kgid_t gid; | |
26092bf5 TT |
1431 | int arg = 0; |
1432 | ||
57f73c2c TT |
1433 | #ifdef CONFIG_QUOTA |
1434 | if (token == Opt_usrjquota) | |
1435 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1436 | else if (token == Opt_grpjquota) | |
1437 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1438 | else if (token == Opt_offusrjquota) | |
1439 | return clear_qf_name(sb, USRQUOTA); | |
1440 | else if (token == Opt_offgrpjquota) | |
1441 | return clear_qf_name(sb, GRPQUOTA); | |
1442 | #endif | |
26092bf5 | 1443 | switch (token) { |
f7048605 TT |
1444 | case Opt_noacl: |
1445 | case Opt_nouser_xattr: | |
1446 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1447 | break; | |
26092bf5 TT |
1448 | case Opt_sb: |
1449 | return 1; /* handled by get_sb_block() */ | |
1450 | case Opt_removed: | |
5f3633e3 | 1451 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1452 | return 1; |
26092bf5 TT |
1453 | case Opt_abort: |
1454 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1455 | return 1; | |
1456 | case Opt_i_version: | |
1457 | sb->s_flags |= MS_I_VERSION; | |
1458 | return 1; | |
26092bf5 TT |
1459 | } |
1460 | ||
5f3633e3 JK |
1461 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1462 | if (token == m->token) | |
1463 | break; | |
1464 | ||
1465 | if (m->token == Opt_err) { | |
1466 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1467 | "or missing value", opt); | |
1468 | return -1; | |
1469 | } | |
1470 | ||
8dc0aa8c TT |
1471 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1472 | ext4_msg(sb, KERN_ERR, | |
1473 | "Mount option \"%s\" incompatible with ext2", opt); | |
1474 | return -1; | |
1475 | } | |
1476 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1477 | ext4_msg(sb, KERN_ERR, | |
1478 | "Mount option \"%s\" incompatible with ext3", opt); | |
1479 | return -1; | |
1480 | } | |
1481 | ||
ad4eec61 | 1482 | if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) |
5f3633e3 JK |
1483 | return -1; |
1484 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1485 | return -1; | |
1486 | if (m->flags & MOPT_EXPLICIT) | |
1487 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1488 | if (m->flags & MOPT_CLEAR_ERR) | |
1489 | clear_opt(sb, ERRORS_MASK); | |
1490 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1491 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1492 | "options when quota turned on"); | |
1493 | return -1; | |
1494 | } | |
1495 | ||
1496 | if (m->flags & MOPT_NOSUPPORT) { | |
1497 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1498 | } else if (token == Opt_commit) { | |
1499 | if (arg == 0) | |
1500 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1501 | sbi->s_commit_interval = HZ * arg; | |
1502 | } else if (token == Opt_max_batch_time) { | |
1503 | if (arg == 0) | |
1504 | arg = EXT4_DEF_MAX_BATCH_TIME; | |
1505 | sbi->s_max_batch_time = arg; | |
1506 | } else if (token == Opt_min_batch_time) { | |
1507 | sbi->s_min_batch_time = arg; | |
1508 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1509 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1510 | ext4_msg(sb, KERN_ERR, | |
1511 | "EXT4-fs: inode_readahead_blks must be " | |
1512 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1513 | return -1; |
5f3633e3 JK |
1514 | } |
1515 | sbi->s_inode_readahead_blks = arg; | |
1516 | } else if (token == Opt_init_itable) { | |
1517 | set_opt(sb, INIT_INODE_TABLE); | |
1518 | if (!args->from) | |
1519 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1520 | sbi->s_li_wait_mult = arg; | |
1521 | } else if (token == Opt_max_dir_size_kb) { | |
1522 | sbi->s_max_dir_size_kb = arg; | |
1523 | } else if (token == Opt_stripe) { | |
1524 | sbi->s_stripe = arg; | |
1525 | } else if (token == Opt_resuid) { | |
1526 | uid = make_kuid(current_user_ns(), arg); | |
1527 | if (!uid_valid(uid)) { | |
1528 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1529 | return -1; |
1530 | } | |
5f3633e3 JK |
1531 | sbi->s_resuid = uid; |
1532 | } else if (token == Opt_resgid) { | |
1533 | gid = make_kgid(current_user_ns(), arg); | |
1534 | if (!gid_valid(gid)) { | |
1535 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1536 | return -1; | |
1537 | } | |
1538 | sbi->s_resgid = gid; | |
1539 | } else if (token == Opt_journal_dev) { | |
1540 | if (is_remount) { | |
1541 | ext4_msg(sb, KERN_ERR, | |
1542 | "Cannot specify journal on remount"); | |
1543 | return -1; | |
1544 | } | |
1545 | *journal_devnum = arg; | |
ad4eec61 ES |
1546 | } else if (token == Opt_journal_path) { |
1547 | char *journal_path; | |
1548 | struct inode *journal_inode; | |
1549 | struct path path; | |
1550 | int error; | |
1551 | ||
1552 | if (is_remount) { | |
1553 | ext4_msg(sb, KERN_ERR, | |
1554 | "Cannot specify journal on remount"); | |
1555 | return -1; | |
1556 | } | |
1557 | journal_path = match_strdup(&args[0]); | |
1558 | if (!journal_path) { | |
1559 | ext4_msg(sb, KERN_ERR, "error: could not dup " | |
1560 | "journal device string"); | |
1561 | return -1; | |
1562 | } | |
1563 | ||
1564 | error = kern_path(journal_path, LOOKUP_FOLLOW, &path); | |
1565 | if (error) { | |
1566 | ext4_msg(sb, KERN_ERR, "error: could not find " | |
1567 | "journal device path: error %d", error); | |
1568 | kfree(journal_path); | |
1569 | return -1; | |
1570 | } | |
1571 | ||
1572 | journal_inode = path.dentry->d_inode; | |
1573 | if (!S_ISBLK(journal_inode->i_mode)) { | |
1574 | ext4_msg(sb, KERN_ERR, "error: journal path %s " | |
1575 | "is not a block device", journal_path); | |
1576 | path_put(&path); | |
1577 | kfree(journal_path); | |
1578 | return -1; | |
1579 | } | |
1580 | ||
1581 | *journal_devnum = new_encode_dev(journal_inode->i_rdev); | |
1582 | path_put(&path); | |
1583 | kfree(journal_path); | |
5f3633e3 JK |
1584 | } else if (token == Opt_journal_ioprio) { |
1585 | if (arg > 7) { | |
1586 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1587 | " (must be 0-7)"); | |
1588 | return -1; | |
1589 | } | |
1590 | *journal_ioprio = | |
1591 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
1592 | } else if (m->flags & MOPT_DATAJ) { | |
1593 | if (is_remount) { | |
1594 | if (!sbi->s_journal) | |
1595 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1596 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1597 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1598 | "Cannot change data mode on remount"); |
26092bf5 | 1599 | return -1; |
ac27a0ec | 1600 | } |
26092bf5 | 1601 | } else { |
5f3633e3 JK |
1602 | clear_opt(sb, DATA_FLAGS); |
1603 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1604 | } |
5f3633e3 JK |
1605 | #ifdef CONFIG_QUOTA |
1606 | } else if (m->flags & MOPT_QFMT) { | |
1607 | if (sb_any_quota_loaded(sb) && | |
1608 | sbi->s_jquota_fmt != m->mount_opt) { | |
1609 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1610 | "quota options when quota turned on"); | |
1611 | return -1; | |
1612 | } | |
262b4662 JK |
1613 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
1614 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
1615 | ext4_msg(sb, KERN_ERR, | |
1616 | "Cannot set journaled quota options " | |
1617 | "when QUOTA feature is enabled"); | |
1618 | return -1; | |
1619 | } | |
5f3633e3 JK |
1620 | sbi->s_jquota_fmt = m->mount_opt; |
1621 | #endif | |
1622 | } else { | |
1623 | if (!args->from) | |
1624 | arg = 1; | |
1625 | if (m->flags & MOPT_CLEAR) | |
1626 | arg = !arg; | |
1627 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1628 | ext4_msg(sb, KERN_WARNING, | |
1629 | "buggy handling of option %s", opt); | |
1630 | WARN_ON(1); | |
1631 | return -1; | |
1632 | } | |
1633 | if (arg != 0) | |
1634 | sbi->s_mount_opt |= m->mount_opt; | |
1635 | else | |
1636 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1637 | } |
5f3633e3 | 1638 | return 1; |
26092bf5 TT |
1639 | } |
1640 | ||
1641 | static int parse_options(char *options, struct super_block *sb, | |
1642 | unsigned long *journal_devnum, | |
1643 | unsigned int *journal_ioprio, | |
1644 | int is_remount) | |
1645 | { | |
1646 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1647 | char *p; | |
1648 | substring_t args[MAX_OPT_ARGS]; | |
1649 | int token; | |
1650 | ||
1651 | if (!options) | |
1652 | return 1; | |
1653 | ||
1654 | while ((p = strsep(&options, ",")) != NULL) { | |
1655 | if (!*p) | |
1656 | continue; | |
1657 | /* | |
1658 | * Initialize args struct so we know whether arg was | |
1659 | * found; some options take optional arguments. | |
1660 | */ | |
caecd0af | 1661 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1662 | token = match_token(p, tokens, args); |
1663 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1664 | journal_ioprio, is_remount) < 0) | |
1665 | return 0; | |
ac27a0ec DK |
1666 | } |
1667 | #ifdef CONFIG_QUOTA | |
262b4662 JK |
1668 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
1669 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { | |
1670 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " | |
1671 | "feature is enabled"); | |
1672 | return 0; | |
1673 | } | |
ac27a0ec | 1674 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
482a7425 | 1675 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1676 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1677 | |
482a7425 | 1678 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1679 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1680 | |
56c50f11 | 1681 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1682 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1683 | "format mixing"); | |
ac27a0ec DK |
1684 | return 0; |
1685 | } | |
1686 | ||
1687 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1688 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1689 | "not specified"); | |
ac27a0ec DK |
1690 | return 0; |
1691 | } | |
1692 | } else { | |
1693 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1694 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1695 | "specified with no journaling " |
b31e1552 | 1696 | "enabled"); |
ac27a0ec DK |
1697 | return 0; |
1698 | } | |
1699 | } | |
1700 | #endif | |
261cb20c JK |
1701 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1702 | int blocksize = | |
1703 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1704 | ||
1705 | if (blocksize < PAGE_CACHE_SIZE) { | |
1706 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
1707 | "dioread_nolock if block size != PAGE_SIZE"); | |
1708 | return 0; | |
1709 | } | |
1710 | } | |
ac27a0ec DK |
1711 | return 1; |
1712 | } | |
1713 | ||
2adf6da8 TT |
1714 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1715 | struct super_block *sb) | |
1716 | { | |
1717 | #if defined(CONFIG_QUOTA) | |
1718 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1719 | ||
1720 | if (sbi->s_jquota_fmt) { | |
1721 | char *fmtname = ""; | |
1722 | ||
1723 | switch (sbi->s_jquota_fmt) { | |
1724 | case QFMT_VFS_OLD: | |
1725 | fmtname = "vfsold"; | |
1726 | break; | |
1727 | case QFMT_VFS_V0: | |
1728 | fmtname = "vfsv0"; | |
1729 | break; | |
1730 | case QFMT_VFS_V1: | |
1731 | fmtname = "vfsv1"; | |
1732 | break; | |
1733 | } | |
1734 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1735 | } | |
1736 | ||
1737 | if (sbi->s_qf_names[USRQUOTA]) | |
1738 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1739 | ||
1740 | if (sbi->s_qf_names[GRPQUOTA]) | |
1741 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
2adf6da8 TT |
1742 | #endif |
1743 | } | |
1744 | ||
5a916be1 TT |
1745 | static const char *token2str(int token) |
1746 | { | |
50df9fd5 | 1747 | const struct match_token *t; |
5a916be1 TT |
1748 | |
1749 | for (t = tokens; t->token != Opt_err; t++) | |
1750 | if (t->token == token && !strchr(t->pattern, '=')) | |
1751 | break; | |
1752 | return t->pattern; | |
1753 | } | |
1754 | ||
2adf6da8 TT |
1755 | /* |
1756 | * Show an option if | |
1757 | * - it's set to a non-default value OR | |
1758 | * - if the per-sb default is different from the global default | |
1759 | */ | |
66acdcf4 TT |
1760 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1761 | int nodefs) | |
2adf6da8 | 1762 | { |
2adf6da8 TT |
1763 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1764 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1765 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1766 | const struct mount_opts *m; |
66acdcf4 | 1767 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1768 | |
66acdcf4 TT |
1769 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1770 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1771 | |
1772 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1773 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1774 | ||
1775 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1776 | int want_set = m->flags & MOPT_SET; | |
1777 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1778 | (m->flags & MOPT_CLEAR_ERR)) | |
1779 | continue; | |
66acdcf4 | 1780 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1781 | continue; /* skip if same as the default */ |
1782 | if ((want_set && | |
1783 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1784 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1785 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1786 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1787 | } |
5a916be1 | 1788 | |
08cefc7a | 1789 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1790 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1791 | SEQ_OPTS_PRINT("resuid=%u", |
1792 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1793 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1794 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1795 | SEQ_OPTS_PRINT("resgid=%u", |
1796 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1797 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1798 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1799 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1800 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1801 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1802 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1803 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1804 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1805 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1806 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1807 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1808 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1809 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1810 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1811 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1812 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1813 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1814 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1815 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1816 | SEQ_OPTS_PUTS("data=journal"); | |
1817 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1818 | SEQ_OPTS_PUTS("data=ordered"); | |
1819 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1820 | SEQ_OPTS_PUTS("data=writeback"); | |
1821 | } | |
66acdcf4 TT |
1822 | if (nodefs || |
1823 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1824 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1825 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1826 | |
66acdcf4 TT |
1827 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1828 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1829 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1830 | if (nodefs || sbi->s_max_dir_size_kb) |
1831 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1832 | |
1833 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1834 | return 0; |
1835 | } | |
1836 | ||
66acdcf4 TT |
1837 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1838 | { | |
1839 | return _ext4_show_options(seq, root->d_sb, 0); | |
1840 | } | |
1841 | ||
1842 | static int options_seq_show(struct seq_file *seq, void *offset) | |
1843 | { | |
1844 | struct super_block *sb = seq->private; | |
1845 | int rc; | |
1846 | ||
1847 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1848 | rc = _ext4_show_options(seq, sb, 1); | |
1849 | seq_puts(seq, "\n"); | |
1850 | return rc; | |
1851 | } | |
1852 | ||
1853 | static int options_open_fs(struct inode *inode, struct file *file) | |
1854 | { | |
d9dda78b | 1855 | return single_open(file, options_seq_show, PDE_DATA(inode)); |
66acdcf4 TT |
1856 | } |
1857 | ||
1858 | static const struct file_operations ext4_seq_options_fops = { | |
1859 | .owner = THIS_MODULE, | |
1860 | .open = options_open_fs, | |
1861 | .read = seq_read, | |
1862 | .llseek = seq_lseek, | |
1863 | .release = single_release, | |
1864 | }; | |
1865 | ||
617ba13b | 1866 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1867 | int read_only) |
1868 | { | |
617ba13b | 1869 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1870 | int res = 0; |
1871 | ||
617ba13b | 1872 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1873 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1874 | "forcing read-only mode"); | |
ac27a0ec DK |
1875 | res = MS_RDONLY; |
1876 | } | |
1877 | if (read_only) | |
281b5995 | 1878 | goto done; |
617ba13b | 1879 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1880 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1881 | "running e2fsck is recommended"); | |
617ba13b | 1882 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1883 | ext4_msg(sb, KERN_WARNING, |
1884 | "warning: mounting fs with errors, " | |
1885 | "running e2fsck is recommended"); | |
ed3ce80a | 1886 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1887 | le16_to_cpu(es->s_mnt_count) >= |
1888 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1889 | ext4_msg(sb, KERN_WARNING, |
1890 | "warning: maximal mount count reached, " | |
1891 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1892 | else if (le32_to_cpu(es->s_checkinterval) && |
1893 | (le32_to_cpu(es->s_lastcheck) + | |
1894 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1895 | ext4_msg(sb, KERN_WARNING, |
1896 | "warning: checktime reached, " | |
1897 | "running e2fsck is recommended"); | |
0b8e58a1 | 1898 | if (!sbi->s_journal) |
0390131b | 1899 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1900 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1901 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1902 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1903 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1904 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1905 | if (sbi->s_journal) |
1906 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1907 | |
e2d67052 | 1908 | ext4_commit_super(sb, 1); |
281b5995 | 1909 | done: |
ac27a0ec | 1910 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1911 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1912 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1913 | sb->s_blocksize, |
1914 | sbi->s_groups_count, | |
617ba13b MC |
1915 | EXT4_BLOCKS_PER_GROUP(sb), |
1916 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1917 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1918 | |
7abc52c2 | 1919 | cleancache_init_fs(sb); |
ac27a0ec DK |
1920 | return res; |
1921 | } | |
1922 | ||
117fff10 TT |
1923 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1924 | { | |
1925 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1926 | struct flex_groups *new_groups; | |
1927 | int size; | |
1928 | ||
1929 | if (!sbi->s_log_groups_per_flex) | |
1930 | return 0; | |
1931 | ||
1932 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
1933 | if (size <= sbi->s_flex_groups_allocated) | |
1934 | return 0; | |
1935 | ||
1936 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
1937 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
1938 | if (!new_groups) { | |
1939 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
1940 | size / (int) sizeof(struct flex_groups)); | |
1941 | return -ENOMEM; | |
1942 | } | |
1943 | ||
1944 | if (sbi->s_flex_groups) { | |
1945 | memcpy(new_groups, sbi->s_flex_groups, | |
1946 | (sbi->s_flex_groups_allocated * | |
1947 | sizeof(struct flex_groups))); | |
1948 | ext4_kvfree(sbi->s_flex_groups); | |
1949 | } | |
1950 | sbi->s_flex_groups = new_groups; | |
1951 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
1952 | return 0; | |
1953 | } | |
1954 | ||
772cb7c8 JS |
1955 | static int ext4_fill_flex_info(struct super_block *sb) |
1956 | { | |
1957 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1958 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 1959 | ext4_group_t flex_group; |
117fff10 | 1960 | int i, err; |
772cb7c8 | 1961 | |
503358ae | 1962 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 1963 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
1964 | sbi->s_log_groups_per_flex = 0; |
1965 | return 1; | |
1966 | } | |
1967 | ||
117fff10 TT |
1968 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
1969 | if (err) | |
9933fc0a | 1970 | goto failed; |
772cb7c8 | 1971 | |
772cb7c8 | 1972 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1973 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1974 | |
1975 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1976 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1977 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
1978 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
1979 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
1980 | atomic_add(ext4_used_dirs_count(sb, gdp), |
1981 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1982 | } |
1983 | ||
1984 | return 1; | |
1985 | failed: | |
1986 | return 0; | |
1987 | } | |
1988 | ||
feb0ab32 DW |
1989 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1990 | struct ext4_group_desc *gdp) | |
717d50e4 | 1991 | { |
feb0ab32 | 1992 | int offset; |
717d50e4 | 1993 | __u16 crc = 0; |
feb0ab32 | 1994 | __le32 le_group = cpu_to_le32(block_group); |
717d50e4 | 1995 | |
feb0ab32 DW |
1996 | if ((sbi->s_es->s_feature_ro_compat & |
1997 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { | |
1998 | /* Use new metadata_csum algorithm */ | |
d6a77105 | 1999 | __le16 save_csum; |
feb0ab32 DW |
2000 | __u32 csum32; |
2001 | ||
d6a77105 | 2002 | save_csum = gdp->bg_checksum; |
feb0ab32 DW |
2003 | gdp->bg_checksum = 0; |
2004 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
2005 | sizeof(le_group)); | |
2006 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
2007 | sbi->s_desc_size); | |
d6a77105 | 2008 | gdp->bg_checksum = save_csum; |
feb0ab32 DW |
2009 | |
2010 | crc = csum32 & 0xFFFF; | |
2011 | goto out; | |
717d50e4 AD |
2012 | } |
2013 | ||
feb0ab32 DW |
2014 | /* old crc16 code */ |
2015 | offset = offsetof(struct ext4_group_desc, bg_checksum); | |
2016 | ||
2017 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
2018 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
2019 | crc = crc16(crc, (__u8 *)gdp, offset); | |
2020 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
2021 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
2022 | if ((sbi->s_es->s_feature_incompat & | |
2023 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
2024 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
2025 | crc = crc16(crc, (__u8 *)gdp + offset, | |
2026 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
2027 | offset); | |
2028 | ||
2029 | out: | |
717d50e4 AD |
2030 | return cpu_to_le16(crc); |
2031 | } | |
2032 | ||
feb0ab32 | 2033 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
2034 | struct ext4_group_desc *gdp) |
2035 | { | |
feb0ab32 DW |
2036 | if (ext4_has_group_desc_csum(sb) && |
2037 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), | |
2038 | block_group, gdp))) | |
717d50e4 AD |
2039 | return 0; |
2040 | ||
2041 | return 1; | |
2042 | } | |
2043 | ||
feb0ab32 DW |
2044 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2045 | struct ext4_group_desc *gdp) | |
2046 | { | |
2047 | if (!ext4_has_group_desc_csum(sb)) | |
2048 | return; | |
2049 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); | |
2050 | } | |
2051 | ||
ac27a0ec | 2052 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2053 | static int ext4_check_descriptors(struct super_block *sb, |
2054 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2055 | { |
617ba13b MC |
2056 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2057 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2058 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2059 | ext4_fsblk_t block_bitmap; |
2060 | ext4_fsblk_t inode_bitmap; | |
2061 | ext4_fsblk_t inode_table; | |
ce421581 | 2062 | int flexbg_flag = 0; |
bfff6873 | 2063 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2064 | |
ce421581 JS |
2065 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2066 | flexbg_flag = 1; | |
2067 | ||
af5bc92d | 2068 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2069 | |
197cd65a AM |
2070 | for (i = 0; i < sbi->s_groups_count; i++) { |
2071 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2072 | ||
ce421581 | 2073 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2074 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2075 | else |
2076 | last_block = first_block + | |
617ba13b | 2077 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2078 | |
bfff6873 LC |
2079 | if ((grp == sbi->s_groups_count) && |
2080 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2081 | grp = i; | |
2082 | ||
8fadc143 | 2083 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2084 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2085 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2086 | "Block bitmap for group %u not in group " |
b31e1552 | 2087 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2088 | return 0; |
2089 | } | |
8fadc143 | 2090 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2091 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2092 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2093 | "Inode bitmap for group %u not in group " |
b31e1552 | 2094 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2095 | return 0; |
2096 | } | |
8fadc143 | 2097 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2098 | if (inode_table < first_block || |
2b2d6d01 | 2099 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2100 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2101 | "Inode table for group %u not in group " |
b31e1552 | 2102 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2103 | return 0; |
2104 | } | |
955ce5f5 | 2105 | ext4_lock_group(sb, i); |
feb0ab32 | 2106 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2107 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2108 | "Checksum for group %u failed (%u!=%u)", | |
2109 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2110 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2111 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2112 | ext4_unlock_group(sb, i); |
8a266467 | 2113 | return 0; |
7ee1ec4c | 2114 | } |
717d50e4 | 2115 | } |
955ce5f5 | 2116 | ext4_unlock_group(sb, i); |
ce421581 JS |
2117 | if (!flexbg_flag) |
2118 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2119 | } |
bfff6873 LC |
2120 | if (NULL != first_not_zeroed) |
2121 | *first_not_zeroed = grp; | |
ac27a0ec | 2122 | |
5dee5437 TT |
2123 | ext4_free_blocks_count_set(sbi->s_es, |
2124 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2125 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2126 | return 1; |
2127 | } | |
2128 | ||
617ba13b | 2129 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2130 | * the superblock) which were deleted from all directories, but held open by |
2131 | * a process at the time of a crash. We walk the list and try to delete these | |
2132 | * inodes at recovery time (only with a read-write filesystem). | |
2133 | * | |
2134 | * In order to keep the orphan inode chain consistent during traversal (in | |
2135 | * case of crash during recovery), we link each inode into the superblock | |
2136 | * orphan list_head and handle it the same way as an inode deletion during | |
2137 | * normal operation (which journals the operations for us). | |
2138 | * | |
2139 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2140 | * accidentally point at an in-use or already deleted inode. The worst that | |
2141 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2142 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2143 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2144 | * inode cleanup for us, so we can safely abort without any further action. | |
2145 | */ | |
2b2d6d01 TT |
2146 | static void ext4_orphan_cleanup(struct super_block *sb, |
2147 | struct ext4_super_block *es) | |
ac27a0ec DK |
2148 | { |
2149 | unsigned int s_flags = sb->s_flags; | |
2150 | int nr_orphans = 0, nr_truncates = 0; | |
2151 | #ifdef CONFIG_QUOTA | |
2152 | int i; | |
2153 | #endif | |
2154 | if (!es->s_last_orphan) { | |
2155 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2156 | return; | |
2157 | } | |
2158 | ||
a8f48a95 | 2159 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2160 | ext4_msg(sb, KERN_ERR, "write access " |
2161 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2162 | return; |
2163 | } | |
2164 | ||
d39195c3 AG |
2165 | /* Check if feature set would not allow a r/w mount */ |
2166 | if (!ext4_feature_set_ok(sb, 0)) { | |
2167 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2168 | "unknown ROCOMPAT features"); | |
2169 | return; | |
2170 | } | |
2171 | ||
617ba13b | 2172 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2173 | /* don't clear list on RO mount w/ errors */ |
2174 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
ac27a0ec DK |
2175 | jbd_debug(1, "Errors on filesystem, " |
2176 | "clearing orphan list.\n"); | |
c25f9bc6 ES |
2177 | es->s_last_orphan = 0; |
2178 | } | |
ac27a0ec DK |
2179 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2180 | return; | |
2181 | } | |
2182 | ||
2183 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2184 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2185 | sb->s_flags &= ~MS_RDONLY; |
2186 | } | |
2187 | #ifdef CONFIG_QUOTA | |
2188 | /* Needed for iput() to work correctly and not trash data */ | |
2189 | sb->s_flags |= MS_ACTIVE; | |
2190 | /* Turn on quotas so that they are updated correctly */ | |
2191 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2192 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2193 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2194 | if (ret < 0) |
b31e1552 ES |
2195 | ext4_msg(sb, KERN_ERR, |
2196 | "Cannot turn on journaled " | |
2197 | "quota: error %d", ret); | |
ac27a0ec DK |
2198 | } |
2199 | } | |
2200 | #endif | |
2201 | ||
2202 | while (es->s_last_orphan) { | |
2203 | struct inode *inode; | |
2204 | ||
97bd42b9 JB |
2205 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2206 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2207 | es->s_last_orphan = 0; |
2208 | break; | |
2209 | } | |
2210 | ||
617ba13b | 2211 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2212 | dquot_initialize(inode); |
ac27a0ec | 2213 | if (inode->i_nlink) { |
566370a2 PT |
2214 | if (test_opt(sb, DEBUG)) |
2215 | ext4_msg(sb, KERN_DEBUG, | |
2216 | "%s: truncating inode %lu to %lld bytes", | |
2217 | __func__, inode->i_ino, inode->i_size); | |
e5f8eab8 | 2218 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2219 | inode->i_ino, inode->i_size); |
721e3eba | 2220 | mutex_lock(&inode->i_mutex); |
55f252c9 | 2221 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
617ba13b | 2222 | ext4_truncate(inode); |
721e3eba | 2223 | mutex_unlock(&inode->i_mutex); |
ac27a0ec DK |
2224 | nr_truncates++; |
2225 | } else { | |
566370a2 PT |
2226 | if (test_opt(sb, DEBUG)) |
2227 | ext4_msg(sb, KERN_DEBUG, | |
2228 | "%s: deleting unreferenced inode %lu", | |
2229 | __func__, inode->i_ino); | |
ac27a0ec DK |
2230 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2231 | inode->i_ino); | |
2232 | nr_orphans++; | |
2233 | } | |
2234 | iput(inode); /* The delete magic happens here! */ | |
2235 | } | |
2236 | ||
2b2d6d01 | 2237 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2238 | |
2239 | if (nr_orphans) | |
b31e1552 ES |
2240 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2241 | PLURAL(nr_orphans)); | |
ac27a0ec | 2242 | if (nr_truncates) |
b31e1552 ES |
2243 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2244 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2245 | #ifdef CONFIG_QUOTA |
2246 | /* Turn quotas off */ | |
2247 | for (i = 0; i < MAXQUOTAS; i++) { | |
2248 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2249 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2250 | } |
2251 | #endif | |
2252 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2253 | } | |
0b8e58a1 | 2254 | |
cd2291a4 ES |
2255 | /* |
2256 | * Maximal extent format file size. | |
2257 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2258 | * extent format containers, within a sector_t, and within i_blocks | |
2259 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2260 | * so that won't be a limiting factor. | |
2261 | * | |
f17722f9 LC |
2262 | * However there is other limiting factor. We do store extents in the form |
2263 | * of starting block and length, hence the resulting length of the extent | |
2264 | * covering maximum file size must fit into on-disk format containers as | |
2265 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2266 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2267 | * | |
cd2291a4 ES |
2268 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2269 | */ | |
f287a1a5 | 2270 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2271 | { |
2272 | loff_t res; | |
2273 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2274 | ||
2275 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2276 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2277 | /* |
90c699a9 | 2278 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2279 | * i_block represent total blocks in 512 bytes |
2280 | * 32 == size of vfs inode i_blocks * 8 | |
2281 | */ | |
2282 | upper_limit = (1LL << 32) - 1; | |
2283 | ||
2284 | /* total blocks in file system block size */ | |
2285 | upper_limit >>= (blkbits - 9); | |
2286 | upper_limit <<= blkbits; | |
2287 | } | |
2288 | ||
f17722f9 LC |
2289 | /* |
2290 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2291 | * by one fs block, so ee_len can cover the extent of maximum file | |
2292 | * size | |
2293 | */ | |
2294 | res = (1LL << 32) - 1; | |
cd2291a4 | 2295 | res <<= blkbits; |
cd2291a4 ES |
2296 | |
2297 | /* Sanity check against vm- & vfs- imposed limits */ | |
2298 | if (res > upper_limit) | |
2299 | res = upper_limit; | |
2300 | ||
2301 | return res; | |
2302 | } | |
ac27a0ec | 2303 | |
ac27a0ec | 2304 | /* |
cd2291a4 | 2305 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2306 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2307 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2308 | */ |
f287a1a5 | 2309 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2310 | { |
617ba13b | 2311 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2312 | int meta_blocks; |
2313 | loff_t upper_limit; | |
0b8e58a1 AD |
2314 | /* This is calculated to be the largest file size for a dense, block |
2315 | * mapped file such that the file's total number of 512-byte sectors, | |
2316 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2317 | * | |
2318 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2319 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2320 | */ |
2321 | ||
f287a1a5 | 2322 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2323 | /* |
90c699a9 | 2324 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2325 | * the inode i_block field represents total file blocks in |
2326 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2327 | */ |
2328 | upper_limit = (1LL << 32) - 1; | |
2329 | ||
2330 | /* total blocks in file system block size */ | |
2331 | upper_limit >>= (bits - 9); | |
2332 | ||
2333 | } else { | |
8180a562 AK |
2334 | /* |
2335 | * We use 48 bit ext4_inode i_blocks | |
2336 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2337 | * represent total number of blocks in | |
2338 | * file system block size | |
2339 | */ | |
0fc1b451 AK |
2340 | upper_limit = (1LL << 48) - 1; |
2341 | ||
0fc1b451 AK |
2342 | } |
2343 | ||
2344 | /* indirect blocks */ | |
2345 | meta_blocks = 1; | |
2346 | /* double indirect blocks */ | |
2347 | meta_blocks += 1 + (1LL << (bits-2)); | |
2348 | /* tripple indirect blocks */ | |
2349 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2350 | ||
2351 | upper_limit -= meta_blocks; | |
2352 | upper_limit <<= bits; | |
ac27a0ec DK |
2353 | |
2354 | res += 1LL << (bits-2); | |
2355 | res += 1LL << (2*(bits-2)); | |
2356 | res += 1LL << (3*(bits-2)); | |
2357 | res <<= bits; | |
2358 | if (res > upper_limit) | |
2359 | res = upper_limit; | |
0fc1b451 AK |
2360 | |
2361 | if (res > MAX_LFS_FILESIZE) | |
2362 | res = MAX_LFS_FILESIZE; | |
2363 | ||
ac27a0ec DK |
2364 | return res; |
2365 | } | |
2366 | ||
617ba13b | 2367 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2368 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2369 | { |
617ba13b | 2370 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2371 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2372 | int has_super = 0; |
2373 | ||
2374 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2375 | ||
617ba13b | 2376 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2377 | nr < first_meta_bg) |
70bbb3e0 | 2378 | return logical_sb_block + nr + 1; |
ac27a0ec | 2379 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2380 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2381 | has_super = 1; |
0b8e58a1 | 2382 | |
617ba13b | 2383 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2384 | } |
2385 | ||
c9de560d AT |
2386 | /** |
2387 | * ext4_get_stripe_size: Get the stripe size. | |
2388 | * @sbi: In memory super block info | |
2389 | * | |
2390 | * If we have specified it via mount option, then | |
2391 | * use the mount option value. If the value specified at mount time is | |
2392 | * greater than the blocks per group use the super block value. | |
2393 | * If the super block value is greater than blocks per group return 0. | |
2394 | * Allocator needs it be less than blocks per group. | |
2395 | * | |
2396 | */ | |
2397 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2398 | { | |
2399 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2400 | unsigned long stripe_width = | |
2401 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2402 | int ret; |
c9de560d AT |
2403 | |
2404 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2405 | ret = sbi->s_stripe; |
2406 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2407 | ret = stripe_width; | |
2408 | else if (stride <= sbi->s_blocks_per_group) | |
2409 | ret = stride; | |
2410 | else | |
2411 | ret = 0; | |
c9de560d | 2412 | |
3eb08658 DE |
2413 | /* |
2414 | * If the stripe width is 1, this makes no sense and | |
2415 | * we set it to 0 to turn off stripe handling code. | |
2416 | */ | |
2417 | if (ret <= 1) | |
2418 | ret = 0; | |
c9de560d | 2419 | |
3eb08658 | 2420 | return ret; |
c9de560d | 2421 | } |
ac27a0ec | 2422 | |
3197ebdb TT |
2423 | /* sysfs supprt */ |
2424 | ||
2425 | struct ext4_attr { | |
2426 | struct attribute attr; | |
2427 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2428 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb | 2429 | const char *, size_t); |
f2d50a65 JK |
2430 | union { |
2431 | int offset; | |
2432 | int deprecated_val; | |
2433 | } u; | |
3197ebdb TT |
2434 | }; |
2435 | ||
27dd4385 LC |
2436 | static int parse_strtoull(const char *buf, |
2437 | unsigned long long max, unsigned long long *value) | |
2438 | { | |
2439 | int ret; | |
2440 | ||
2441 | ret = kstrtoull(skip_spaces(buf), 0, value); | |
2442 | if (!ret && *value > max) | |
2443 | ret = -EINVAL; | |
2444 | return ret; | |
2445 | } | |
2446 | ||
3197ebdb TT |
2447 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
2448 | struct ext4_sb_info *sbi, | |
2449 | char *buf) | |
2450 | { | |
2451 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2452 | (s64) EXT4_C2B(sbi, |
2453 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2454 | } |
2455 | ||
2456 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2457 | struct ext4_sb_info *sbi, char *buf) | |
2458 | { | |
2459 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2460 | ||
f613dfcb TT |
2461 | if (!sb->s_bdev->bd_part) |
2462 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2463 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2464 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2465 | sbi->s_sectors_written_start) >> 1); | |
2466 | } | |
2467 | ||
2468 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2469 | struct ext4_sb_info *sbi, char *buf) | |
2470 | { | |
2471 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2472 | ||
f613dfcb TT |
2473 | if (!sb->s_bdev->bd_part) |
2474 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2475 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2476 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2477 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2478 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2479 | } |
2480 | ||
2481 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2482 | struct ext4_sb_info *sbi, | |
2483 | const char *buf, size_t count) | |
2484 | { | |
2485 | unsigned long t; | |
e1091b15 | 2486 | int ret; |
3197ebdb | 2487 | |
e1091b15 LC |
2488 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2489 | if (ret) | |
2490 | return ret; | |
3197ebdb | 2491 | |
e1091b15 | 2492 | if (t && (!is_power_of_2(t) || t > 0x40000000)) |
3197ebdb TT |
2493 | return -EINVAL; |
2494 | ||
2495 | sbi->s_inode_readahead_blks = t; | |
2496 | return count; | |
2497 | } | |
2498 | ||
2499 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2500 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb | 2501 | { |
f2d50a65 | 2502 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
3197ebdb TT |
2503 | |
2504 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2505 | } | |
2506 | ||
2507 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2508 | struct ext4_sb_info *sbi, | |
2509 | const char *buf, size_t count) | |
2510 | { | |
f2d50a65 | 2511 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); |
3197ebdb | 2512 | unsigned long t; |
e1091b15 | 2513 | int ret; |
3197ebdb | 2514 | |
e1091b15 LC |
2515 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2516 | if (ret) | |
2517 | return ret; | |
3197ebdb TT |
2518 | *ui = t; |
2519 | return count; | |
2520 | } | |
2521 | ||
27dd4385 LC |
2522 | static ssize_t reserved_clusters_show(struct ext4_attr *a, |
2523 | struct ext4_sb_info *sbi, char *buf) | |
2524 | { | |
2525 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2526 | (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); | |
2527 | } | |
2528 | ||
2529 | static ssize_t reserved_clusters_store(struct ext4_attr *a, | |
2530 | struct ext4_sb_info *sbi, | |
2531 | const char *buf, size_t count) | |
2532 | { | |
2533 | unsigned long long val; | |
2534 | int ret; | |
2535 | ||
2536 | if (parse_strtoull(buf, -1ULL, &val)) | |
2537 | return -EINVAL; | |
2538 | ret = ext4_reserve_clusters(sbi, val); | |
2539 | ||
2540 | return ret ? ret : count; | |
2541 | } | |
2542 | ||
2c0544b2 TT |
2543 | static ssize_t trigger_test_error(struct ext4_attr *a, |
2544 | struct ext4_sb_info *sbi, | |
2545 | const char *buf, size_t count) | |
2546 | { | |
2547 | int len = count; | |
2548 | ||
2549 | if (!capable(CAP_SYS_ADMIN)) | |
2550 | return -EPERM; | |
2551 | ||
2552 | if (len && buf[len-1] == '\n') | |
2553 | len--; | |
2554 | ||
2555 | if (len) | |
2556 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
2557 | return count; | |
2558 | } | |
2559 | ||
f2d50a65 JK |
2560 | static ssize_t sbi_deprecated_show(struct ext4_attr *a, |
2561 | struct ext4_sb_info *sbi, char *buf) | |
2562 | { | |
2563 | return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); | |
2564 | } | |
2565 | ||
3197ebdb TT |
2566 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
2567 | static struct ext4_attr ext4_attr_##_name = { \ | |
2568 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2569 | .show = _show, \ | |
2570 | .store = _store, \ | |
f2d50a65 JK |
2571 | .u = { \ |
2572 | .offset = offsetof(struct ext4_sb_info, _elname),\ | |
2573 | }, \ | |
3197ebdb TT |
2574 | } |
2575 | #define EXT4_ATTR(name, mode, show, store) \ | |
2576 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2577 | ||
857ac889 | 2578 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2579 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2580 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2581 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2582 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2583 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
f2d50a65 JK |
2584 | #define EXT4_DEPRECATED_ATTR(_name, _val) \ |
2585 | static struct ext4_attr ext4_attr_##_name = { \ | |
2586 | .attr = {.name = __stringify(_name), .mode = 0444 }, \ | |
2587 | .show = sbi_deprecated_show, \ | |
2588 | .u = { \ | |
2589 | .deprecated_val = _val, \ | |
2590 | }, \ | |
2591 | } | |
3197ebdb TT |
2592 | |
2593 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2594 | EXT4_RO_ATTR(session_write_kbytes); | |
2595 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
27dd4385 | 2596 | EXT4_RW_ATTR(reserved_clusters); |
3197ebdb TT |
2597 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2598 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2599 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2600 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2601 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2602 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2603 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2604 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2605 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
f2d50a65 | 2606 | EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); |
67a5da56 | 2607 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
2c0544b2 | 2608 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
3197ebdb TT |
2609 | |
2610 | static struct attribute *ext4_attrs[] = { | |
2611 | ATTR_LIST(delayed_allocation_blocks), | |
2612 | ATTR_LIST(session_write_kbytes), | |
2613 | ATTR_LIST(lifetime_write_kbytes), | |
27dd4385 | 2614 | ATTR_LIST(reserved_clusters), |
3197ebdb | 2615 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2616 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2617 | ATTR_LIST(mb_stats), |
2618 | ATTR_LIST(mb_max_to_scan), | |
2619 | ATTR_LIST(mb_min_to_scan), | |
2620 | ATTR_LIST(mb_order2_req), | |
2621 | ATTR_LIST(mb_stream_req), | |
2622 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2623 | ATTR_LIST(max_writeback_mb_bump), |
67a5da56 | 2624 | ATTR_LIST(extent_max_zeroout_kb), |
2c0544b2 | 2625 | ATTR_LIST(trigger_fs_error), |
3197ebdb TT |
2626 | NULL, |
2627 | }; | |
2628 | ||
857ac889 LC |
2629 | /* Features this copy of ext4 supports */ |
2630 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2631 | EXT4_INFO_ATTR(batched_discard); |
5e7bbef1 | 2632 | EXT4_INFO_ATTR(meta_bg_resize); |
857ac889 LC |
2633 | |
2634 | static struct attribute *ext4_feat_attrs[] = { | |
2635 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2636 | ATTR_LIST(batched_discard), |
5e7bbef1 | 2637 | ATTR_LIST(meta_bg_resize), |
857ac889 LC |
2638 | NULL, |
2639 | }; | |
2640 | ||
3197ebdb TT |
2641 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2642 | struct attribute *attr, char *buf) | |
2643 | { | |
2644 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2645 | s_kobj); | |
2646 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2647 | ||
2648 | return a->show ? a->show(a, sbi, buf) : 0; | |
2649 | } | |
2650 | ||
2651 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2652 | struct attribute *attr, | |
2653 | const char *buf, size_t len) | |
2654 | { | |
2655 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2656 | s_kobj); | |
2657 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2658 | ||
2659 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2660 | } | |
2661 | ||
2662 | static void ext4_sb_release(struct kobject *kobj) | |
2663 | { | |
2664 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2665 | s_kobj); | |
2666 | complete(&sbi->s_kobj_unregister); | |
2667 | } | |
2668 | ||
52cf25d0 | 2669 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2670 | .show = ext4_attr_show, |
2671 | .store = ext4_attr_store, | |
2672 | }; | |
2673 | ||
2674 | static struct kobj_type ext4_ktype = { | |
2675 | .default_attrs = ext4_attrs, | |
2676 | .sysfs_ops = &ext4_attr_ops, | |
2677 | .release = ext4_sb_release, | |
2678 | }; | |
2679 | ||
857ac889 LC |
2680 | static void ext4_feat_release(struct kobject *kobj) |
2681 | { | |
2682 | complete(&ext4_feat->f_kobj_unregister); | |
2683 | } | |
2684 | ||
2685 | static struct kobj_type ext4_feat_ktype = { | |
2686 | .default_attrs = ext4_feat_attrs, | |
2687 | .sysfs_ops = &ext4_attr_ops, | |
2688 | .release = ext4_feat_release, | |
2689 | }; | |
2690 | ||
a13fb1a4 ES |
2691 | /* |
2692 | * Check whether this filesystem can be mounted based on | |
2693 | * the features present and the RDONLY/RDWR mount requested. | |
2694 | * Returns 1 if this filesystem can be mounted as requested, | |
2695 | * 0 if it cannot be. | |
2696 | */ | |
2697 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2698 | { | |
2699 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2700 | ext4_msg(sb, KERN_ERR, | |
2701 | "Couldn't mount because of " | |
2702 | "unsupported optional features (%x)", | |
2703 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2704 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2705 | return 0; | |
2706 | } | |
2707 | ||
2708 | if (readonly) | |
2709 | return 1; | |
2710 | ||
2711 | /* Check that feature set is OK for a read-write mount */ | |
2712 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2713 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2714 | "unsupported optional features (%x)", | |
2715 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2716 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2717 | return 0; | |
2718 | } | |
2719 | /* | |
2720 | * Large file size enabled file system can only be mounted | |
2721 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2722 | */ | |
2723 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2724 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2725 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2726 | "cannot be mounted RDWR without " | |
2727 | "CONFIG_LBDAF"); | |
2728 | return 0; | |
2729 | } | |
2730 | } | |
bab08ab9 TT |
2731 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2732 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2733 | ext4_msg(sb, KERN_ERR, | |
2734 | "Can't support bigalloc feature without " | |
2735 | "extents feature\n"); | |
2736 | return 0; | |
2737 | } | |
7c319d32 AK |
2738 | |
2739 | #ifndef CONFIG_QUOTA | |
2740 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
2741 | !readonly) { | |
2742 | ext4_msg(sb, KERN_ERR, | |
2743 | "Filesystem with quota feature cannot be mounted RDWR " | |
2744 | "without CONFIG_QUOTA"); | |
2745 | return 0; | |
2746 | } | |
2747 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2748 | return 1; |
2749 | } | |
2750 | ||
66e61a9e TT |
2751 | /* |
2752 | * This function is called once a day if we have errors logged | |
2753 | * on the file system | |
2754 | */ | |
2755 | static void print_daily_error_info(unsigned long arg) | |
2756 | { | |
2757 | struct super_block *sb = (struct super_block *) arg; | |
2758 | struct ext4_sb_info *sbi; | |
2759 | struct ext4_super_block *es; | |
2760 | ||
2761 | sbi = EXT4_SB(sb); | |
2762 | es = sbi->s_es; | |
2763 | ||
2764 | if (es->s_error_count) | |
2765 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2766 | le32_to_cpu(es->s_error_count)); | |
2767 | if (es->s_first_error_time) { | |
2768 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2769 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2770 | (int) sizeof(es->s_first_error_func), | |
2771 | es->s_first_error_func, | |
2772 | le32_to_cpu(es->s_first_error_line)); | |
2773 | if (es->s_first_error_ino) | |
2774 | printk(": inode %u", | |
2775 | le32_to_cpu(es->s_first_error_ino)); | |
2776 | if (es->s_first_error_block) | |
2777 | printk(": block %llu", (unsigned long long) | |
2778 | le64_to_cpu(es->s_first_error_block)); | |
2779 | printk("\n"); | |
2780 | } | |
2781 | if (es->s_last_error_time) { | |
2782 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2783 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2784 | (int) sizeof(es->s_last_error_func), | |
2785 | es->s_last_error_func, | |
2786 | le32_to_cpu(es->s_last_error_line)); | |
2787 | if (es->s_last_error_ino) | |
2788 | printk(": inode %u", | |
2789 | le32_to_cpu(es->s_last_error_ino)); | |
2790 | if (es->s_last_error_block) | |
2791 | printk(": block %llu", (unsigned long long) | |
2792 | le64_to_cpu(es->s_last_error_block)); | |
2793 | printk("\n"); | |
2794 | } | |
2795 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2796 | } | |
2797 | ||
bfff6873 LC |
2798 | /* Find next suitable group and run ext4_init_inode_table */ |
2799 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2800 | { | |
2801 | struct ext4_group_desc *gdp = NULL; | |
2802 | ext4_group_t group, ngroups; | |
2803 | struct super_block *sb; | |
2804 | unsigned long timeout = 0; | |
2805 | int ret = 0; | |
2806 | ||
2807 | sb = elr->lr_super; | |
2808 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2809 | ||
8e8ad8a5 | 2810 | sb_start_write(sb); |
bfff6873 LC |
2811 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2812 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2813 | if (!gdp) { | |
2814 | ret = 1; | |
2815 | break; | |
2816 | } | |
2817 | ||
2818 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2819 | break; | |
2820 | } | |
2821 | ||
7f511862 | 2822 | if (group >= ngroups) |
bfff6873 LC |
2823 | ret = 1; |
2824 | ||
2825 | if (!ret) { | |
2826 | timeout = jiffies; | |
2827 | ret = ext4_init_inode_table(sb, group, | |
2828 | elr->lr_timeout ? 0 : 1); | |
2829 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2830 | timeout = (jiffies - timeout) * |
2831 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2832 | elr->lr_timeout = timeout; |
2833 | } | |
2834 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2835 | elr->lr_next_group = group + 1; | |
2836 | } | |
8e8ad8a5 | 2837 | sb_end_write(sb); |
bfff6873 LC |
2838 | |
2839 | return ret; | |
2840 | } | |
2841 | ||
2842 | /* | |
2843 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2844 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2845 | */ |
2846 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2847 | { | |
2848 | struct ext4_sb_info *sbi; | |
2849 | ||
2850 | if (!elr) | |
2851 | return; | |
2852 | ||
2853 | sbi = elr->lr_sbi; | |
2854 | ||
2855 | list_del(&elr->lr_request); | |
2856 | sbi->s_li_request = NULL; | |
2857 | kfree(elr); | |
2858 | } | |
2859 | ||
2860 | static void ext4_unregister_li_request(struct super_block *sb) | |
2861 | { | |
1bb933fb LC |
2862 | mutex_lock(&ext4_li_mtx); |
2863 | if (!ext4_li_info) { | |
2864 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2865 | return; |
1bb933fb | 2866 | } |
bfff6873 LC |
2867 | |
2868 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2869 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2870 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2871 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2872 | } |
2873 | ||
8f1f7453 ES |
2874 | static struct task_struct *ext4_lazyinit_task; |
2875 | ||
bfff6873 LC |
2876 | /* |
2877 | * This is the function where ext4lazyinit thread lives. It walks | |
2878 | * through the request list searching for next scheduled filesystem. | |
2879 | * When such a fs is found, run the lazy initialization request | |
2880 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2881 | * function. Based on that time we compute next schedule time of | |
2882 | * the request. When walking through the list is complete, compute | |
2883 | * next waking time and put itself into sleep. | |
2884 | */ | |
2885 | static int ext4_lazyinit_thread(void *arg) | |
2886 | { | |
2887 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2888 | struct list_head *pos, *n; | |
2889 | struct ext4_li_request *elr; | |
4ed5c033 | 2890 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2891 | |
2892 | BUG_ON(NULL == eli); | |
2893 | ||
bfff6873 LC |
2894 | cont_thread: |
2895 | while (true) { | |
2896 | next_wakeup = MAX_JIFFY_OFFSET; | |
2897 | ||
2898 | mutex_lock(&eli->li_list_mtx); | |
2899 | if (list_empty(&eli->li_request_list)) { | |
2900 | mutex_unlock(&eli->li_list_mtx); | |
2901 | goto exit_thread; | |
2902 | } | |
2903 | ||
2904 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2905 | elr = list_entry(pos, struct ext4_li_request, | |
2906 | lr_request); | |
2907 | ||
b2c78cd0 TT |
2908 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2909 | if (ext4_run_li_request(elr) != 0) { | |
2910 | /* error, remove the lazy_init job */ | |
2911 | ext4_remove_li_request(elr); | |
2912 | continue; | |
2913 | } | |
bfff6873 LC |
2914 | } |
2915 | ||
2916 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2917 | next_wakeup = elr->lr_next_sched; | |
2918 | } | |
2919 | mutex_unlock(&eli->li_list_mtx); | |
2920 | ||
a0acae0e | 2921 | try_to_freeze(); |
bfff6873 | 2922 | |
4ed5c033 LC |
2923 | cur = jiffies; |
2924 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2925 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2926 | cond_resched(); |
2927 | continue; | |
2928 | } | |
2929 | ||
4ed5c033 LC |
2930 | schedule_timeout_interruptible(next_wakeup - cur); |
2931 | ||
8f1f7453 ES |
2932 | if (kthread_should_stop()) { |
2933 | ext4_clear_request_list(); | |
2934 | goto exit_thread; | |
2935 | } | |
bfff6873 LC |
2936 | } |
2937 | ||
2938 | exit_thread: | |
2939 | /* | |
2940 | * It looks like the request list is empty, but we need | |
2941 | * to check it under the li_list_mtx lock, to prevent any | |
2942 | * additions into it, and of course we should lock ext4_li_mtx | |
2943 | * to atomically free the list and ext4_li_info, because at | |
2944 | * this point another ext4 filesystem could be registering | |
2945 | * new one. | |
2946 | */ | |
2947 | mutex_lock(&ext4_li_mtx); | |
2948 | mutex_lock(&eli->li_list_mtx); | |
2949 | if (!list_empty(&eli->li_request_list)) { | |
2950 | mutex_unlock(&eli->li_list_mtx); | |
2951 | mutex_unlock(&ext4_li_mtx); | |
2952 | goto cont_thread; | |
2953 | } | |
2954 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2955 | kfree(ext4_li_info); |
2956 | ext4_li_info = NULL; | |
2957 | mutex_unlock(&ext4_li_mtx); | |
2958 | ||
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | static void ext4_clear_request_list(void) | |
2963 | { | |
2964 | struct list_head *pos, *n; | |
2965 | struct ext4_li_request *elr; | |
2966 | ||
2967 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2968 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2969 | elr = list_entry(pos, struct ext4_li_request, | |
2970 | lr_request); | |
2971 | ext4_remove_li_request(elr); | |
2972 | } | |
2973 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2974 | } | |
2975 | ||
2976 | static int ext4_run_lazyinit_thread(void) | |
2977 | { | |
8f1f7453 ES |
2978 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2979 | ext4_li_info, "ext4lazyinit"); | |
2980 | if (IS_ERR(ext4_lazyinit_task)) { | |
2981 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2982 | ext4_clear_request_list(); |
bfff6873 LC |
2983 | kfree(ext4_li_info); |
2984 | ext4_li_info = NULL; | |
92b97816 | 2985 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2986 | "initialization thread\n", |
2987 | err); | |
2988 | return err; | |
2989 | } | |
2990 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2991 | return 0; |
2992 | } | |
2993 | ||
2994 | /* | |
2995 | * Check whether it make sense to run itable init. thread or not. | |
2996 | * If there is at least one uninitialized inode table, return | |
2997 | * corresponding group number, else the loop goes through all | |
2998 | * groups and return total number of groups. | |
2999 | */ | |
3000 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
3001 | { | |
3002 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
3003 | struct ext4_group_desc *gdp = NULL; | |
3004 | ||
3005 | for (group = 0; group < ngroups; group++) { | |
3006 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3007 | if (!gdp) | |
3008 | continue; | |
3009 | ||
3010 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | return group; | |
3015 | } | |
3016 | ||
3017 | static int ext4_li_info_new(void) | |
3018 | { | |
3019 | struct ext4_lazy_init *eli = NULL; | |
3020 | ||
3021 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3022 | if (!eli) | |
3023 | return -ENOMEM; | |
3024 | ||
bfff6873 LC |
3025 | INIT_LIST_HEAD(&eli->li_request_list); |
3026 | mutex_init(&eli->li_list_mtx); | |
3027 | ||
bfff6873 LC |
3028 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3029 | ||
3030 | ext4_li_info = eli; | |
3031 | ||
3032 | return 0; | |
3033 | } | |
3034 | ||
3035 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3036 | ext4_group_t start) | |
3037 | { | |
3038 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3039 | struct ext4_li_request *elr; | |
3040 | unsigned long rnd; | |
3041 | ||
3042 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3043 | if (!elr) | |
3044 | return NULL; | |
3045 | ||
3046 | elr->lr_super = sb; | |
3047 | elr->lr_sbi = sbi; | |
3048 | elr->lr_next_group = start; | |
3049 | ||
3050 | /* | |
3051 | * Randomize first schedule time of the request to | |
3052 | * spread the inode table initialization requests | |
3053 | * better. | |
3054 | */ | |
3055 | get_random_bytes(&rnd, sizeof(rnd)); | |
3056 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
3057 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
3058 | ||
3059 | return elr; | |
3060 | } | |
3061 | ||
7f511862 TT |
3062 | int ext4_register_li_request(struct super_block *sb, |
3063 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3064 | { |
3065 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3066 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3067 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3068 | int ret = 0; |
bfff6873 | 3069 | |
7f511862 | 3070 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3071 | if (sbi->s_li_request != NULL) { |
3072 | /* | |
3073 | * Reset timeout so it can be computed again, because | |
3074 | * s_li_wait_mult might have changed. | |
3075 | */ | |
3076 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3077 | goto out; |
51ce6511 | 3078 | } |
bfff6873 LC |
3079 | |
3080 | if (first_not_zeroed == ngroups || | |
3081 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3082 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3083 | goto out; |
bfff6873 LC |
3084 | |
3085 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3086 | if (!elr) { |
3087 | ret = -ENOMEM; | |
3088 | goto out; | |
3089 | } | |
bfff6873 LC |
3090 | |
3091 | if (NULL == ext4_li_info) { | |
3092 | ret = ext4_li_info_new(); | |
3093 | if (ret) | |
3094 | goto out; | |
3095 | } | |
3096 | ||
3097 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3098 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3099 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3100 | ||
3101 | sbi->s_li_request = elr; | |
46e4690b TM |
3102 | /* |
3103 | * set elr to NULL here since it has been inserted to | |
3104 | * the request_list and the removal and free of it is | |
3105 | * handled by ext4_clear_request_list from now on. | |
3106 | */ | |
3107 | elr = NULL; | |
bfff6873 LC |
3108 | |
3109 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3110 | ret = ext4_run_lazyinit_thread(); | |
3111 | if (ret) | |
3112 | goto out; | |
3113 | } | |
bfff6873 | 3114 | out: |
beed5ecb NK |
3115 | mutex_unlock(&ext4_li_mtx); |
3116 | if (ret) | |
bfff6873 | 3117 | kfree(elr); |
bfff6873 LC |
3118 | return ret; |
3119 | } | |
3120 | ||
3121 | /* | |
3122 | * We do not need to lock anything since this is called on | |
3123 | * module unload. | |
3124 | */ | |
3125 | static void ext4_destroy_lazyinit_thread(void) | |
3126 | { | |
3127 | /* | |
3128 | * If thread exited earlier | |
3129 | * there's nothing to be done. | |
3130 | */ | |
8f1f7453 | 3131 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3132 | return; |
3133 | ||
8f1f7453 | 3134 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3135 | } |
3136 | ||
25ed6e8a DW |
3137 | static int set_journal_csum_feature_set(struct super_block *sb) |
3138 | { | |
3139 | int ret = 1; | |
3140 | int compat, incompat; | |
3141 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3142 | ||
3143 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3144 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3145 | /* journal checksum v2 */ | |
3146 | compat = 0; | |
3147 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; | |
3148 | } else { | |
3149 | /* journal checksum v1 */ | |
3150 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3151 | incompat = 0; | |
3152 | } | |
3153 | ||
3154 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3155 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3156 | compat, 0, | |
3157 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3158 | incompat); | |
3159 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3160 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3161 | compat, 0, | |
3162 | incompat); | |
3163 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3164 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3165 | } else { | |
3166 | jbd2_journal_clear_features(sbi->s_journal, | |
3167 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3168 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3169 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
3170 | } | |
3171 | ||
3172 | return ret; | |
3173 | } | |
3174 | ||
952fc18e TT |
3175 | /* |
3176 | * Note: calculating the overhead so we can be compatible with | |
3177 | * historical BSD practice is quite difficult in the face of | |
3178 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3179 | * different block group can end up in the same allocation cluster. | |
3180 | * Calculating the exact overhead in the face of clustered allocation | |
3181 | * requires either O(all block bitmaps) in memory or O(number of block | |
3182 | * groups**2) in time. We will still calculate the superblock for | |
3183 | * older file systems --- and if we come across with a bigalloc file | |
3184 | * system with zero in s_overhead_clusters the estimate will be close to | |
3185 | * correct especially for very large cluster sizes --- but for newer | |
3186 | * file systems, it's better to calculate this figure once at mkfs | |
3187 | * time, and store it in the superblock. If the superblock value is | |
3188 | * present (even for non-bigalloc file systems), we will use it. | |
3189 | */ | |
3190 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3191 | char *buf) | |
3192 | { | |
3193 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3194 | struct ext4_group_desc *gdp; | |
3195 | ext4_fsblk_t first_block, last_block, b; | |
3196 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3197 | int s, j, count = 0; | |
3198 | ||
0548bbb8 TT |
3199 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) |
3200 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + | |
3201 | sbi->s_itb_per_group + 2); | |
3202 | ||
952fc18e TT |
3203 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3204 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3205 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3206 | for (i = 0; i < ngroups; i++) { | |
3207 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3208 | b = ext4_block_bitmap(sb, gdp); | |
3209 | if (b >= first_block && b <= last_block) { | |
3210 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3211 | count++; | |
3212 | } | |
3213 | b = ext4_inode_bitmap(sb, gdp); | |
3214 | if (b >= first_block && b <= last_block) { | |
3215 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3216 | count++; | |
3217 | } | |
3218 | b = ext4_inode_table(sb, gdp); | |
3219 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3220 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3221 | int c = EXT4_B2C(sbi, b - first_block); | |
3222 | ext4_set_bit(c, buf); | |
3223 | count++; | |
3224 | } | |
3225 | if (i != grp) | |
3226 | continue; | |
3227 | s = 0; | |
3228 | if (ext4_bg_has_super(sb, grp)) { | |
3229 | ext4_set_bit(s++, buf); | |
3230 | count++; | |
3231 | } | |
3232 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3233 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3234 | count++; | |
3235 | } | |
3236 | } | |
3237 | if (!count) | |
3238 | return 0; | |
3239 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3240 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3241 | } | |
3242 | ||
3243 | /* | |
3244 | * Compute the overhead and stash it in sbi->s_overhead | |
3245 | */ | |
3246 | int ext4_calculate_overhead(struct super_block *sb) | |
3247 | { | |
3248 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3249 | struct ext4_super_block *es = sbi->s_es; | |
3250 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3251 | ext4_fsblk_t overhead = 0; | |
3252 | char *buf = (char *) get_zeroed_page(GFP_KERNEL); | |
3253 | ||
952fc18e TT |
3254 | if (!buf) |
3255 | return -ENOMEM; | |
3256 | ||
3257 | /* | |
3258 | * Compute the overhead (FS structures). This is constant | |
3259 | * for a given filesystem unless the number of block groups | |
3260 | * changes so we cache the previous value until it does. | |
3261 | */ | |
3262 | ||
3263 | /* | |
3264 | * All of the blocks before first_data_block are overhead | |
3265 | */ | |
3266 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3267 | ||
3268 | /* | |
3269 | * Add the overhead found in each block group | |
3270 | */ | |
3271 | for (i = 0; i < ngroups; i++) { | |
3272 | int blks; | |
3273 | ||
3274 | blks = count_overhead(sb, i, buf); | |
3275 | overhead += blks; | |
3276 | if (blks) | |
3277 | memset(buf, 0, PAGE_SIZE); | |
3278 | cond_resched(); | |
3279 | } | |
0875a2b4 ES |
3280 | /* Add the journal blocks as well */ |
3281 | if (sbi->s_journal) | |
810da240 | 3282 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3283 | |
952fc18e TT |
3284 | sbi->s_overhead = overhead; |
3285 | smp_wmb(); | |
3286 | free_page((unsigned long) buf); | |
3287 | return 0; | |
3288 | } | |
3289 | ||
27dd4385 LC |
3290 | |
3291 | static ext4_fsblk_t ext4_calculate_resv_clusters(struct ext4_sb_info *sbi) | |
3292 | { | |
3293 | ext4_fsblk_t resv_clusters; | |
3294 | ||
3295 | /* | |
3296 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3297 | * This should cover the situations where we can not afford to run | |
3298 | * out of space like for example punch hole, or converting | |
3299 | * uninitialized extents in delalloc path. In most cases such | |
3300 | * allocation would require 1, or 2 blocks, higher numbers are | |
3301 | * very rare. | |
3302 | */ | |
3303 | resv_clusters = ext4_blocks_count(sbi->s_es) >> sbi->s_cluster_bits; | |
3304 | ||
3305 | do_div(resv_clusters, 50); | |
3306 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3307 | ||
3308 | return resv_clusters; | |
3309 | } | |
3310 | ||
3311 | ||
3312 | static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) | |
3313 | { | |
3314 | ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> | |
3315 | sbi->s_cluster_bits; | |
3316 | ||
3317 | if (count >= clusters) | |
3318 | return -EINVAL; | |
3319 | ||
3320 | atomic64_set(&sbi->s_resv_clusters, count); | |
3321 | return 0; | |
3322 | } | |
3323 | ||
2b2d6d01 | 3324 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3325 | { |
d4c402d9 | 3326 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3327 | struct buffer_head *bh; |
617ba13b MC |
3328 | struct ext4_super_block *es = NULL; |
3329 | struct ext4_sb_info *sbi; | |
3330 | ext4_fsblk_t block; | |
3331 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3332 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3333 | unsigned long offset = 0; |
ac27a0ec DK |
3334 | unsigned long journal_devnum = 0; |
3335 | unsigned long def_mount_opts; | |
3336 | struct inode *root; | |
9f6200bb | 3337 | char *cp; |
0390131b | 3338 | const char *descr; |
dcc7dae3 | 3339 | int ret = -ENOMEM; |
281b5995 | 3340 | int blocksize, clustersize; |
4ec11028 TT |
3341 | unsigned int db_count; |
3342 | unsigned int i; | |
281b5995 | 3343 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3344 | __u64 blocks_count; |
07aa2ea1 | 3345 | int err = 0; |
b3881f74 | 3346 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3347 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3348 | |
3349 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3350 | if (!sbi) | |
dcc7dae3 | 3351 | goto out_free_orig; |
705895b6 PE |
3352 | |
3353 | sbi->s_blockgroup_lock = | |
3354 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3355 | if (!sbi->s_blockgroup_lock) { | |
3356 | kfree(sbi); | |
dcc7dae3 | 3357 | goto out_free_orig; |
705895b6 | 3358 | } |
ac27a0ec | 3359 | sb->s_fs_info = sbi; |
2c0544b2 | 3360 | sbi->s_sb = sb; |
240799cd | 3361 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3362 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3363 | if (sb->s_bdev->bd_part) |
3364 | sbi->s_sectors_written_start = | |
3365 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3366 | |
9f6200bb TT |
3367 | /* Cleanup superblock name */ |
3368 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3369 | *cp = '!'; | |
3370 | ||
07aa2ea1 | 3371 | /* -EINVAL is default */ |
dcc7dae3 | 3372 | ret = -EINVAL; |
617ba13b | 3373 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3374 | if (!blocksize) { |
b31e1552 | 3375 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3376 | goto out_fail; |
3377 | } | |
3378 | ||
3379 | /* | |
617ba13b | 3380 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3381 | * block sizes. We need to calculate the offset from buffer start. |
3382 | */ | |
617ba13b | 3383 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3384 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3385 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3386 | } else { |
70bbb3e0 | 3387 | logical_sb_block = sb_block; |
ac27a0ec DK |
3388 | } |
3389 | ||
70bbb3e0 | 3390 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3391 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3392 | goto out_fail; |
3393 | } | |
3394 | /* | |
3395 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3396 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3397 | */ |
2716b802 | 3398 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3399 | sbi->s_es = es; |
3400 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3401 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3402 | goto cantfind_ext4; | |
afc32f7e | 3403 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3404 | |
feb0ab32 DW |
3405 | /* Warn if metadata_csum and gdt_csum are both set. */ |
3406 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3407 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
3408 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) | |
3409 | ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " | |
3410 | "redundant flags; please run fsck."); | |
3411 | ||
d25425f8 DW |
3412 | /* Check for a known checksum algorithm */ |
3413 | if (!ext4_verify_csum_type(sb, es)) { | |
3414 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3415 | "unknown checksum algorithm."); | |
3416 | silent = 1; | |
3417 | goto cantfind_ext4; | |
3418 | } | |
3419 | ||
0441984a DW |
3420 | /* Load the checksum driver */ |
3421 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3422 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3423 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
3424 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3425 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3426 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3427 | sbi->s_chksum_driver = NULL; | |
3428 | goto failed_mount; | |
3429 | } | |
3430 | } | |
3431 | ||
a9c47317 DW |
3432 | /* Check superblock checksum */ |
3433 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3434 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3435 | "invalid superblock checksum. Run e2fsck?"); | |
3436 | silent = 1; | |
3437 | goto cantfind_ext4; | |
3438 | } | |
3439 | ||
3440 | /* Precompute checksum seed for all metadata */ | |
3441 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3442 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
3443 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, | |
3444 | sizeof(es->s_uuid)); | |
3445 | ||
ac27a0ec DK |
3446 | /* Set defaults before we parse the mount options */ |
3447 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3448 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3449 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3450 | set_opt(sb, DEBUG); |
87f26807 | 3451 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3452 | set_opt(sb, GRPID); |
617ba13b | 3453 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3454 | set_opt(sb, NO_UID32); |
ea663336 | 3455 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3456 | set_opt(sb, XATTR_USER); |
03010a33 | 3457 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3458 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3459 | #endif |
617ba13b | 3460 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3461 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3462 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3463 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3464 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3465 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3466 | |
3467 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3468 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3469 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3470 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3471 | else |
fd8c37ec | 3472 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3473 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3474 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3475 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3476 | set_opt(sb, DISCARD); |
ac27a0ec | 3477 | |
08cefc7a EB |
3478 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3479 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3480 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3481 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3482 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3483 | |
8b67f04a | 3484 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3485 | set_opt(sb, BARRIER); |
ac27a0ec | 3486 | |
dd919b98 AK |
3487 | /* |
3488 | * enable delayed allocation by default | |
3489 | * Use -o nodelalloc to turn it off | |
3490 | */ | |
bc0b75f7 | 3491 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3492 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3493 | set_opt(sb, DELALLOC); |
dd919b98 | 3494 | |
51ce6511 LC |
3495 | /* |
3496 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3497 | * no mount option specified. | |
3498 | */ | |
3499 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3500 | ||
8b67f04a | 3501 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3502 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3503 | ext4_msg(sb, KERN_WARNING, |
3504 | "failed to parse options in superblock: %s", | |
3505 | sbi->s_es->s_mount_opts); | |
3506 | } | |
5a916be1 | 3507 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3508 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3509 | &journal_ioprio, 0)) |
ac27a0ec DK |
3510 | goto failed_mount; |
3511 | ||
56889787 TT |
3512 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3513 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3514 | "with data=journal disables delayed " | |
3515 | "allocation and O_DIRECT support!\n"); | |
3516 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3517 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3518 | "both data=journal and delalloc"); | |
3519 | goto failed_mount; | |
3520 | } | |
3521 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3522 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6ae6514b | 3523 | "both data=journal and dioread_nolock"); |
56889787 TT |
3524 | goto failed_mount; |
3525 | } | |
3526 | if (test_opt(sb, DELALLOC)) | |
3527 | clear_opt(sb, DELALLOC); | |
3528 | } | |
3529 | ||
ac27a0ec | 3530 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3531 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3532 | |
617ba13b MC |
3533 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3534 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3535 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3536 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3537 | ext4_msg(sb, KERN_WARNING, |
3538 | "feature flags set on rev 0 fs, " | |
3539 | "running e2fsck is recommended"); | |
469108ff | 3540 | |
2035e776 TT |
3541 | if (IS_EXT2_SB(sb)) { |
3542 | if (ext2_feature_set_ok(sb)) | |
3543 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3544 | "using the ext4 subsystem"); | |
3545 | else { | |
3546 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3547 | "to feature incompatibilities"); | |
3548 | goto failed_mount; | |
3549 | } | |
3550 | } | |
3551 | ||
3552 | if (IS_EXT3_SB(sb)) { | |
3553 | if (ext3_feature_set_ok(sb)) | |
3554 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3555 | "using the ext4 subsystem"); | |
3556 | else { | |
3557 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3558 | "to feature incompatibilities"); | |
3559 | goto failed_mount; | |
3560 | } | |
3561 | } | |
3562 | ||
ac27a0ec DK |
3563 | /* |
3564 | * Check feature flags regardless of the revision level, since we | |
3565 | * previously didn't change the revision level when setting the flags, | |
3566 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3567 | */ | |
a13fb1a4 | 3568 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3569 | goto failed_mount; |
a13fb1a4 | 3570 | |
261cb20c | 3571 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3572 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3573 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3574 | ext4_msg(sb, KERN_ERR, |
3575 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3576 | goto failed_mount; |
3577 | } | |
3578 | ||
ac27a0ec | 3579 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3580 | /* Validate the filesystem blocksize */ |
3581 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3582 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3583 | blocksize); |
ac27a0ec DK |
3584 | goto failed_mount; |
3585 | } | |
3586 | ||
2b2d6d01 | 3587 | brelse(bh); |
70bbb3e0 AM |
3588 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3589 | offset = do_div(logical_sb_block, blocksize); | |
3590 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3591 | if (!bh) { |
b31e1552 ES |
3592 | ext4_msg(sb, KERN_ERR, |
3593 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3594 | goto failed_mount; |
3595 | } | |
2716b802 | 3596 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3597 | sbi->s_es = es; |
617ba13b | 3598 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3599 | ext4_msg(sb, KERN_ERR, |
3600 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3601 | goto failed_mount; |
3602 | } | |
3603 | } | |
3604 | ||
a13fb1a4 ES |
3605 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3606 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3607 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3608 | has_huge_files); | |
3609 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3610 | |
617ba13b MC |
3611 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3612 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3613 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3614 | } else { |
3615 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3616 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3617 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3618 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3619 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3620 | ext4_msg(sb, KERN_ERR, |
3621 | "unsupported inode size: %d", | |
2b2d6d01 | 3622 | sbi->s_inode_size); |
ac27a0ec DK |
3623 | goto failed_mount; |
3624 | } | |
ef7f3835 KS |
3625 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3626 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3627 | } |
0b8e58a1 | 3628 | |
0d1ee42f AR |
3629 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3630 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3631 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3632 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3633 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3634 | ext4_msg(sb, KERN_ERR, |
3635 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3636 | sbi->s_desc_size); |
3637 | goto failed_mount; | |
3638 | } | |
3639 | } else | |
3640 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3641 | |
ac27a0ec | 3642 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3643 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3644 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3645 | goto cantfind_ext4; |
0b8e58a1 | 3646 | |
617ba13b | 3647 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3648 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3649 | goto cantfind_ext4; |
ac27a0ec DK |
3650 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3651 | sbi->s_inodes_per_block; | |
0d1ee42f | 3652 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3653 | sbi->s_sbh = bh; |
3654 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3655 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3656 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3657 | |
2b2d6d01 | 3658 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3659 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3660 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3661 | i = le32_to_cpu(es->s_flags); |
3662 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3663 | sbi->s_hash_unsigned = 3; | |
3664 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3665 | #ifdef __CHAR_UNSIGNED__ | |
3666 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3667 | sbi->s_hash_unsigned = 3; | |
3668 | #else | |
3669 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3670 | #endif | |
f99b2589 | 3671 | } |
ac27a0ec | 3672 | |
281b5995 TT |
3673 | /* Handle clustersize */ |
3674 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3675 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3676 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3677 | if (has_bigalloc) { | |
3678 | if (clustersize < blocksize) { | |
3679 | ext4_msg(sb, KERN_ERR, | |
3680 | "cluster size (%d) smaller than " | |
3681 | "block size (%d)", clustersize, blocksize); | |
3682 | goto failed_mount; | |
3683 | } | |
3684 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3685 | le32_to_cpu(es->s_log_block_size); | |
3686 | sbi->s_clusters_per_group = | |
3687 | le32_to_cpu(es->s_clusters_per_group); | |
3688 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3689 | ext4_msg(sb, KERN_ERR, | |
3690 | "#clusters per group too big: %lu", | |
3691 | sbi->s_clusters_per_group); | |
3692 | goto failed_mount; | |
3693 | } | |
3694 | if (sbi->s_blocks_per_group != | |
3695 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3696 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3697 | "clusters per group (%lu) inconsistent", | |
3698 | sbi->s_blocks_per_group, | |
3699 | sbi->s_clusters_per_group); | |
3700 | goto failed_mount; | |
3701 | } | |
3702 | } else { | |
3703 | if (clustersize != blocksize) { | |
3704 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3705 | "block size (%d)", clustersize, | |
3706 | blocksize); | |
3707 | clustersize = blocksize; | |
3708 | } | |
3709 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3710 | ext4_msg(sb, KERN_ERR, | |
3711 | "#blocks per group too big: %lu", | |
3712 | sbi->s_blocks_per_group); | |
3713 | goto failed_mount; | |
3714 | } | |
3715 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3716 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3717 | } |
281b5995 TT |
3718 | sbi->s_cluster_ratio = clustersize / blocksize; |
3719 | ||
ac27a0ec | 3720 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3721 | ext4_msg(sb, KERN_ERR, |
3722 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3723 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3724 | goto failed_mount; |
3725 | } | |
3726 | ||
960fd856 TT |
3727 | /* Do we have standard group size of clustersize * 8 blocks ? */ |
3728 | if (sbi->s_blocks_per_group == clustersize << 3) | |
3729 | set_opt2(sb, STD_GROUP_SIZE); | |
3730 | ||
bf43d84b ES |
3731 | /* |
3732 | * Test whether we have more sectors than will fit in sector_t, | |
3733 | * and whether the max offset is addressable by the page cache. | |
3734 | */ | |
5a9ae68a | 3735 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3736 | ext4_blocks_count(es)); |
5a9ae68a | 3737 | if (err) { |
b31e1552 | 3738 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3739 | " too large to mount safely on this system"); |
ac27a0ec | 3740 | if (sizeof(sector_t) < 8) |
90c699a9 | 3741 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3742 | goto failed_mount; |
3743 | } | |
3744 | ||
617ba13b MC |
3745 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3746 | goto cantfind_ext4; | |
e7c95593 | 3747 | |
0f2ddca6 FTN |
3748 | /* check blocks count against device size */ |
3749 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3750 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3751 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3752 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3753 | ext4_blocks_count(es), blocks_count); |
3754 | goto failed_mount; | |
3755 | } | |
3756 | ||
0b8e58a1 AD |
3757 | /* |
3758 | * It makes no sense for the first data block to be beyond the end | |
3759 | * of the filesystem. | |
3760 | */ | |
3761 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3762 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3763 | "block %u is beyond end of filesystem (%llu)", |
3764 | le32_to_cpu(es->s_first_data_block), | |
3765 | ext4_blocks_count(es)); | |
e7c95593 ES |
3766 | goto failed_mount; |
3767 | } | |
bd81d8ee LV |
3768 | blocks_count = (ext4_blocks_count(es) - |
3769 | le32_to_cpu(es->s_first_data_block) + | |
3770 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3771 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3772 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3773 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3774 | "(block count %llu, first data block %u, " |
b31e1552 | 3775 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3776 | ext4_blocks_count(es), |
3777 | le32_to_cpu(es->s_first_data_block), | |
3778 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3779 | goto failed_mount; | |
3780 | } | |
bd81d8ee | 3781 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3782 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3783 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3784 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3785 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3786 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3787 | sizeof(struct buffer_head *), | |
3788 | GFP_KERNEL); | |
ac27a0ec | 3789 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3790 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3791 | ret = -ENOMEM; |
ac27a0ec DK |
3792 | goto failed_mount; |
3793 | } | |
3794 | ||
9f6200bb TT |
3795 | if (ext4_proc_root) |
3796 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3797 | |
66acdcf4 TT |
3798 | if (sbi->s_proc) |
3799 | proc_create_data("options", S_IRUGO, sbi->s_proc, | |
3800 | &ext4_seq_options_fops, sb); | |
3801 | ||
705895b6 | 3802 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3803 | |
3804 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3805 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3806 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3807 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3808 | ext4_msg(sb, KERN_ERR, |
3809 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3810 | db_count = i; |
3811 | goto failed_mount2; | |
3812 | } | |
3813 | } | |
bfff6873 | 3814 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3815 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3816 | goto failed_mount2; |
3817 | } | |
772cb7c8 JS |
3818 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3819 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3820 | ext4_msg(sb, KERN_ERR, |
3821 | "unable to initialize " | |
3822 | "flex_bg meta info!"); | |
772cb7c8 JS |
3823 | goto failed_mount2; |
3824 | } | |
3825 | ||
ac27a0ec DK |
3826 | sbi->s_gdb_count = db_count; |
3827 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3828 | spin_lock_init(&sbi->s_next_gen_lock); | |
3829 | ||
04496411 TM |
3830 | init_timer(&sbi->s_err_report); |
3831 | sbi->s_err_report.function = print_daily_error_info; | |
3832 | sbi->s_err_report.data = (unsigned long) sb; | |
3833 | ||
a75ae78f | 3834 | /* Register extent status tree shrinker */ |
d3922a77 | 3835 | ext4_es_register_shrinker(sbi); |
a75ae78f | 3836 | |
57042651 | 3837 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3838 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3839 | if (!err) { |
3840 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3841 | ext4_count_free_inodes(sb)); | |
3842 | } | |
3843 | if (!err) { | |
3844 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3845 | ext4_count_dirs(sb)); | |
3846 | } | |
3847 | if (!err) { | |
57042651 | 3848 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a | 3849 | } |
1ac6466f TT |
3850 | if (!err) { |
3851 | err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0); | |
3852 | } | |
ce7e010a TT |
3853 | if (err) { |
3854 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3855 | goto failed_mount3; | |
3856 | } | |
3857 | ||
c9de560d | 3858 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 3859 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3860 | |
ac27a0ec DK |
3861 | /* |
3862 | * set up enough so that it can read an inode | |
3863 | */ | |
9ca92389 TT |
3864 | if (!test_opt(sb, NOLOAD) && |
3865 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3866 | sb->s_op = &ext4_sops; | |
3867 | else | |
3868 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3869 | sb->s_export_op = &ext4_export_ops; |
3870 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3871 | #ifdef CONFIG_QUOTA |
617ba13b | 3872 | sb->dq_op = &ext4_quota_operations; |
262b4662 | 3873 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) |
7c319d32 | 3874 | sb->s_qcop = &ext4_qctl_sysfile_operations; |
262b4662 JK |
3875 | else |
3876 | sb->s_qcop = &ext4_qctl_operations; | |
ac27a0ec | 3877 | #endif |
f2fa2ffc AK |
3878 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3879 | ||
ac27a0ec | 3880 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3881 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3882 | |
3883 | sb->s_root = NULL; | |
3884 | ||
3885 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3886 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3887 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3888 | |
c5e06d10 JL |
3889 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3890 | !(sb->s_flags & MS_RDONLY)) | |
3891 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3892 | goto failed_mount3; | |
3893 | ||
ac27a0ec DK |
3894 | /* |
3895 | * The first inode we look at is the journal inode. Don't try | |
3896 | * root first: it may be modified in the journal! | |
3897 | */ | |
3898 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3899 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3900 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3901 | goto failed_mount3; |
0390131b FM |
3902 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3903 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3904 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3905 | "suppressed and not mounted read-only"); | |
744692dc | 3906 | goto failed_mount_wq; |
ac27a0ec | 3907 | } else { |
fd8c37ec | 3908 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3909 | sbi->s_journal = NULL; |
3910 | needs_recovery = 0; | |
3911 | goto no_journal; | |
ac27a0ec DK |
3912 | } |
3913 | ||
f32aaf2d | 3914 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
eb40a09c JS |
3915 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3916 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3917 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3918 | goto failed_mount_wq; |
eb40a09c JS |
3919 | } |
3920 | ||
25ed6e8a DW |
3921 | if (!set_journal_csum_feature_set(sb)) { |
3922 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3923 | "feature set"); | |
3924 | goto failed_mount_wq; | |
d4da6c9c | 3925 | } |
818d276c | 3926 | |
ac27a0ec DK |
3927 | /* We have now updated the journal if required, so we can |
3928 | * validate the data journaling mode. */ | |
3929 | switch (test_opt(sb, DATA_FLAGS)) { | |
3930 | case 0: | |
3931 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3932 | * capabilities: ORDERED_DATA if the journal can |
3933 | * cope, else JOURNAL_DATA | |
3934 | */ | |
dab291af MC |
3935 | if (jbd2_journal_check_available_features |
3936 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3937 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3938 | else |
fd8c37ec | 3939 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3940 | break; |
3941 | ||
617ba13b MC |
3942 | case EXT4_MOUNT_ORDERED_DATA: |
3943 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3944 | if (!jbd2_journal_check_available_features |
3945 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3946 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3947 | "requested data journaling mode"); | |
744692dc | 3948 | goto failed_mount_wq; |
ac27a0ec DK |
3949 | } |
3950 | default: | |
3951 | break; | |
3952 | } | |
b3881f74 | 3953 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3954 | |
18aadd47 BJ |
3955 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3956 | ||
ce7e010a TT |
3957 | /* |
3958 | * The journal may have updated the bg summary counts, so we | |
3959 | * need to update the global counters. | |
3960 | */ | |
57042651 | 3961 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3962 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3963 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3964 | ext4_count_free_inodes(sb)); | |
3965 | percpu_counter_set(&sbi->s_dirs_counter, | |
3966 | ext4_count_dirs(sb)); | |
57042651 | 3967 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3968 | |
ce7e010a | 3969 | no_journal: |
952fc18e TT |
3970 | /* |
3971 | * Get the # of file system overhead blocks from the | |
3972 | * superblock if present. | |
3973 | */ | |
3974 | if (es->s_overhead_clusters) | |
3975 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3976 | else { | |
07aa2ea1 LC |
3977 | err = ext4_calculate_overhead(sb); |
3978 | if (err) | |
952fc18e TT |
3979 | goto failed_mount_wq; |
3980 | } | |
3981 | ||
fd89d5f2 TH |
3982 | /* |
3983 | * The maximum number of concurrent works can be high and | |
3984 | * concurrency isn't really necessary. Limit it to 1. | |
3985 | */ | |
2e8fa54e JK |
3986 | EXT4_SB(sb)->rsv_conversion_wq = |
3987 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
3988 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
3989 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 3990 | ret = -ENOMEM; |
2e8fa54e JK |
3991 | goto failed_mount4; |
3992 | } | |
3993 | ||
ac27a0ec | 3994 | /* |
dab291af | 3995 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3996 | * so we can safely mount the rest of the filesystem now. |
3997 | */ | |
3998 | ||
1d1fe1ee DH |
3999 | root = ext4_iget(sb, EXT4_ROOT_INO); |
4000 | if (IS_ERR(root)) { | |
b31e1552 | 4001 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 4002 | ret = PTR_ERR(root); |
32a9bb57 | 4003 | root = NULL; |
ac27a0ec DK |
4004 | goto failed_mount4; |
4005 | } | |
4006 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 4007 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 4008 | iput(root); |
ac27a0ec DK |
4009 | goto failed_mount4; |
4010 | } | |
48fde701 | 4011 | sb->s_root = d_make_root(root); |
1d1fe1ee | 4012 | if (!sb->s_root) { |
b31e1552 | 4013 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
4014 | ret = -ENOMEM; |
4015 | goto failed_mount4; | |
4016 | } | |
ac27a0ec | 4017 | |
7e84b621 ES |
4018 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
4019 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
4020 | |
4021 | /* determine the minimum size of new large inodes, if present */ | |
4022 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
4023 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4024 | EXT4_GOOD_OLD_INODE_SIZE; | |
4025 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4026 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
4027 | if (sbi->s_want_extra_isize < | |
4028 | le16_to_cpu(es->s_want_extra_isize)) | |
4029 | sbi->s_want_extra_isize = | |
4030 | le16_to_cpu(es->s_want_extra_isize); | |
4031 | if (sbi->s_want_extra_isize < | |
4032 | le16_to_cpu(es->s_min_extra_isize)) | |
4033 | sbi->s_want_extra_isize = | |
4034 | le16_to_cpu(es->s_min_extra_isize); | |
4035 | } | |
4036 | } | |
4037 | /* Check if enough inode space is available */ | |
4038 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
4039 | sbi->s_inode_size) { | |
4040 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4041 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
4042 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
4043 | "available"); | |
ef7f3835 KS |
4044 | } |
4045 | ||
27dd4385 LC |
4046 | err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sbi)); |
4047 | if (err) { | |
4048 | ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " | |
4049 | "reserved pool", ext4_calculate_resv_clusters(sbi)); | |
4050 | goto failed_mount4a; | |
4051 | } | |
4052 | ||
6fd058f7 TT |
4053 | err = ext4_setup_system_zone(sb); |
4054 | if (err) { | |
b31e1552 | 4055 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 4056 | "zone (%d)", err); |
94bf608a | 4057 | goto failed_mount4a; |
6fd058f7 TT |
4058 | } |
4059 | ||
c2774d84 | 4060 | ext4_ext_init(sb); |
9d99012f | 4061 | err = ext4_mb_init(sb); |
c2774d84 | 4062 | if (err) { |
421f91d2 | 4063 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 4064 | err); |
dcf2d804 | 4065 | goto failed_mount5; |
c2774d84 AK |
4066 | } |
4067 | ||
bfff6873 LC |
4068 | err = ext4_register_li_request(sb, first_not_zeroed); |
4069 | if (err) | |
dcf2d804 | 4070 | goto failed_mount6; |
bfff6873 | 4071 | |
3197ebdb TT |
4072 | sbi->s_kobj.kset = ext4_kset; |
4073 | init_completion(&sbi->s_kobj_unregister); | |
4074 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
4075 | "%s", sb->s_id); | |
dcf2d804 TM |
4076 | if (err) |
4077 | goto failed_mount7; | |
3197ebdb | 4078 | |
9b2ff357 JK |
4079 | #ifdef CONFIG_QUOTA |
4080 | /* Enable quota usage during mount. */ | |
4081 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
4082 | !(sb->s_flags & MS_RDONLY)) { | |
4083 | err = ext4_enable_quotas(sb); | |
4084 | if (err) | |
4085 | goto failed_mount8; | |
4086 | } | |
4087 | #endif /* CONFIG_QUOTA */ | |
4088 | ||
617ba13b MC |
4089 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4090 | ext4_orphan_cleanup(sb, es); | |
4091 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4092 | if (needs_recovery) { |
b31e1552 | 4093 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4094 | ext4_mark_recovery_complete(sb, es); |
4095 | } | |
4096 | if (EXT4_SB(sb)->s_journal) { | |
4097 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4098 | descr = " journalled data mode"; | |
4099 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4100 | descr = " ordered data mode"; | |
4101 | else | |
4102 | descr = " writeback data mode"; | |
4103 | } else | |
4104 | descr = "out journal"; | |
4105 | ||
79add3a3 LC |
4106 | if (test_opt(sb, DISCARD)) { |
4107 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4108 | if (!blk_queue_discard(q)) | |
4109 | ext4_msg(sb, KERN_WARNING, | |
4110 | "mounting with \"discard\" option, but " | |
4111 | "the device does not support discard"); | |
4112 | } | |
4113 | ||
d4c402d9 | 4114 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
4115 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
4116 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4117 | |
66e61a9e TT |
4118 | if (es->s_error_count) |
4119 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4120 | |
d4c402d9 | 4121 | kfree(orig_data); |
ac27a0ec DK |
4122 | return 0; |
4123 | ||
617ba13b | 4124 | cantfind_ext4: |
ac27a0ec | 4125 | if (!silent) |
b31e1552 | 4126 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4127 | goto failed_mount; |
4128 | ||
72ba7450 TT |
4129 | #ifdef CONFIG_QUOTA |
4130 | failed_mount8: | |
4131 | kobject_del(&sbi->s_kobj); | |
4132 | #endif | |
dcf2d804 TM |
4133 | failed_mount7: |
4134 | ext4_unregister_li_request(sb); | |
4135 | failed_mount6: | |
dcf2d804 | 4136 | ext4_mb_release(sb); |
94bf608a AV |
4137 | failed_mount5: |
4138 | ext4_ext_release(sb); | |
dcf2d804 | 4139 | ext4_release_system_zone(sb); |
94bf608a AV |
4140 | failed_mount4a: |
4141 | dput(sb->s_root); | |
32a9bb57 | 4142 | sb->s_root = NULL; |
94bf608a | 4143 | failed_mount4: |
b31e1552 | 4144 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
4145 | if (EXT4_SB(sb)->rsv_conversion_wq) |
4146 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 4147 | failed_mount_wq: |
0390131b FM |
4148 | if (sbi->s_journal) { |
4149 | jbd2_journal_destroy(sbi->s_journal); | |
4150 | sbi->s_journal = NULL; | |
4151 | } | |
ac27a0ec | 4152 | failed_mount3: |
d3922a77 | 4153 | ext4_es_unregister_shrinker(sbi); |
04496411 | 4154 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
4155 | if (sbi->s_flex_groups) |
4156 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 4157 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
4158 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
4159 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 4160 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
1ac6466f | 4161 | percpu_counter_destroy(&sbi->s_extent_cache_cnt); |
c5e06d10 JL |
4162 | if (sbi->s_mmp_tsk) |
4163 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4164 | failed_mount2: |
4165 | for (i = 0; i < db_count; i++) | |
4166 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 4167 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 4168 | failed_mount: |
0441984a DW |
4169 | if (sbi->s_chksum_driver) |
4170 | crypto_free_shash(sbi->s_chksum_driver); | |
240799cd | 4171 | if (sbi->s_proc) { |
66acdcf4 | 4172 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 4173 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 4174 | } |
ac27a0ec DK |
4175 | #ifdef CONFIG_QUOTA |
4176 | for (i = 0; i < MAXQUOTAS; i++) | |
4177 | kfree(sbi->s_qf_names[i]); | |
4178 | #endif | |
617ba13b | 4179 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4180 | brelse(bh); |
4181 | out_fail: | |
4182 | sb->s_fs_info = NULL; | |
f6830165 | 4183 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4184 | kfree(sbi); |
dcc7dae3 | 4185 | out_free_orig: |
d4c402d9 | 4186 | kfree(orig_data); |
07aa2ea1 | 4187 | return err ? err : ret; |
ac27a0ec DK |
4188 | } |
4189 | ||
4190 | /* | |
4191 | * Setup any per-fs journal parameters now. We'll do this both on | |
4192 | * initial mount, once the journal has been initialised but before we've | |
4193 | * done any recovery; and again on any subsequent remount. | |
4194 | */ | |
617ba13b | 4195 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4196 | { |
617ba13b | 4197 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4198 | |
30773840 TT |
4199 | journal->j_commit_interval = sbi->s_commit_interval; |
4200 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4201 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4202 | |
a931da6a | 4203 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4204 | if (test_opt(sb, BARRIER)) |
dab291af | 4205 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4206 | else |
dab291af | 4207 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4208 | if (test_opt(sb, DATA_ERR_ABORT)) |
4209 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4210 | else | |
4211 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4212 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4213 | } |
4214 | ||
617ba13b | 4215 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4216 | unsigned int journal_inum) |
4217 | { | |
4218 | struct inode *journal_inode; | |
4219 | journal_t *journal; | |
4220 | ||
0390131b FM |
4221 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4222 | ||
ac27a0ec DK |
4223 | /* First, test for the existence of a valid inode on disk. Bad |
4224 | * things happen if we iget() an unused inode, as the subsequent | |
4225 | * iput() will try to delete it. */ | |
4226 | ||
1d1fe1ee DH |
4227 | journal_inode = ext4_iget(sb, journal_inum); |
4228 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4229 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4230 | return NULL; |
4231 | } | |
4232 | if (!journal_inode->i_nlink) { | |
4233 | make_bad_inode(journal_inode); | |
4234 | iput(journal_inode); | |
b31e1552 | 4235 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4236 | return NULL; |
4237 | } | |
4238 | ||
e5f8eab8 | 4239 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4240 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4241 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4242 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4243 | iput(journal_inode); |
4244 | return NULL; | |
4245 | } | |
4246 | ||
dab291af | 4247 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4248 | if (!journal) { |
b31e1552 | 4249 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4250 | iput(journal_inode); |
4251 | return NULL; | |
4252 | } | |
4253 | journal->j_private = sb; | |
617ba13b | 4254 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4255 | return journal; |
4256 | } | |
4257 | ||
617ba13b | 4258 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4259 | dev_t j_dev) |
4260 | { | |
2b2d6d01 | 4261 | struct buffer_head *bh; |
ac27a0ec | 4262 | journal_t *journal; |
617ba13b MC |
4263 | ext4_fsblk_t start; |
4264 | ext4_fsblk_t len; | |
ac27a0ec | 4265 | int hblock, blocksize; |
617ba13b | 4266 | ext4_fsblk_t sb_block; |
ac27a0ec | 4267 | unsigned long offset; |
2b2d6d01 | 4268 | struct ext4_super_block *es; |
ac27a0ec DK |
4269 | struct block_device *bdev; |
4270 | ||
0390131b FM |
4271 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4272 | ||
b31e1552 | 4273 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4274 | if (bdev == NULL) |
4275 | return NULL; | |
4276 | ||
ac27a0ec | 4277 | blocksize = sb->s_blocksize; |
e1defc4f | 4278 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4279 | if (blocksize < hblock) { |
b31e1552 ES |
4280 | ext4_msg(sb, KERN_ERR, |
4281 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4282 | goto out_bdev; |
4283 | } | |
4284 | ||
617ba13b MC |
4285 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4286 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4287 | set_blocksize(bdev, blocksize); |
4288 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4289 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4290 | "external journal"); | |
ac27a0ec DK |
4291 | goto out_bdev; |
4292 | } | |
4293 | ||
2716b802 | 4294 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4295 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4296 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4297 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4298 | ext4_msg(sb, KERN_ERR, "external journal has " |
4299 | "bad superblock"); | |
ac27a0ec DK |
4300 | brelse(bh); |
4301 | goto out_bdev; | |
4302 | } | |
4303 | ||
617ba13b | 4304 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4305 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4306 | brelse(bh); |
4307 | goto out_bdev; | |
4308 | } | |
4309 | ||
bd81d8ee | 4310 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4311 | start = sb_block + 1; |
4312 | brelse(bh); /* we're done with the superblock */ | |
4313 | ||
dab291af | 4314 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4315 | start, len, blocksize); |
4316 | if (!journal) { | |
b31e1552 | 4317 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4318 | goto out_bdev; |
4319 | } | |
4320 | journal->j_private = sb; | |
9f203507 | 4321 | ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); |
ac27a0ec DK |
4322 | wait_on_buffer(journal->j_sb_buffer); |
4323 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4324 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4325 | goto out_journal; |
4326 | } | |
4327 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4328 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4329 | "user (unsupported) - %d", | |
ac27a0ec DK |
4330 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4331 | goto out_journal; | |
4332 | } | |
617ba13b MC |
4333 | EXT4_SB(sb)->journal_bdev = bdev; |
4334 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4335 | return journal; |
0b8e58a1 | 4336 | |
ac27a0ec | 4337 | out_journal: |
dab291af | 4338 | jbd2_journal_destroy(journal); |
ac27a0ec | 4339 | out_bdev: |
617ba13b | 4340 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4341 | return NULL; |
4342 | } | |
4343 | ||
617ba13b MC |
4344 | static int ext4_load_journal(struct super_block *sb, |
4345 | struct ext4_super_block *es, | |
ac27a0ec DK |
4346 | unsigned long journal_devnum) |
4347 | { | |
4348 | journal_t *journal; | |
4349 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4350 | dev_t journal_dev; | |
4351 | int err = 0; | |
4352 | int really_read_only; | |
4353 | ||
0390131b FM |
4354 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4355 | ||
ac27a0ec DK |
4356 | if (journal_devnum && |
4357 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4358 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4359 | "numbers have changed"); | |
ac27a0ec DK |
4360 | journal_dev = new_decode_dev(journal_devnum); |
4361 | } else | |
4362 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4363 | ||
4364 | really_read_only = bdev_read_only(sb->s_bdev); | |
4365 | ||
4366 | /* | |
4367 | * Are we loading a blank journal or performing recovery after a | |
4368 | * crash? For recovery, we need to check in advance whether we | |
4369 | * can get read-write access to the device. | |
4370 | */ | |
617ba13b | 4371 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4372 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4373 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4374 | "required on readonly filesystem"); | |
ac27a0ec | 4375 | if (really_read_only) { |
b31e1552 ES |
4376 | ext4_msg(sb, KERN_ERR, "write access " |
4377 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4378 | return -EROFS; |
4379 | } | |
b31e1552 ES |
4380 | ext4_msg(sb, KERN_INFO, "write access will " |
4381 | "be enabled during recovery"); | |
ac27a0ec DK |
4382 | } |
4383 | } | |
4384 | ||
4385 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4386 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4387 | "and inode journals!"); | |
ac27a0ec DK |
4388 | return -EINVAL; |
4389 | } | |
4390 | ||
4391 | if (journal_inum) { | |
617ba13b | 4392 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4393 | return -EINVAL; |
4394 | } else { | |
617ba13b | 4395 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4396 | return -EINVAL; |
4397 | } | |
4398 | ||
90576c0b | 4399 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4400 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4401 | |
617ba13b | 4402 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4403 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4404 | if (!err) { |
4405 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4406 | if (save) | |
4407 | memcpy(save, ((char *) es) + | |
4408 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4409 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4410 | if (save) |
4411 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4412 | save, EXT4_S_ERR_LEN); | |
4413 | kfree(save); | |
4414 | } | |
ac27a0ec DK |
4415 | |
4416 | if (err) { | |
b31e1552 | 4417 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4418 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4419 | return err; |
4420 | } | |
4421 | ||
617ba13b MC |
4422 | EXT4_SB(sb)->s_journal = journal; |
4423 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4424 | |
c41303ce | 4425 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4426 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4427 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4428 | |
4429 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4430 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4431 | } |
4432 | ||
4433 | return 0; | |
4434 | } | |
4435 | ||
e2d67052 | 4436 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4437 | { |
e2d67052 | 4438 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4439 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4440 | int error = 0; |
ac27a0ec | 4441 | |
7c2e7087 | 4442 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4443 | return error; |
914258bf TT |
4444 | if (buffer_write_io_error(sbh)) { |
4445 | /* | |
4446 | * Oh, dear. A previous attempt to write the | |
4447 | * superblock failed. This could happen because the | |
4448 | * USB device was yanked out. Or it could happen to | |
4449 | * be a transient write error and maybe the block will | |
4450 | * be remapped. Nothing we can do but to retry the | |
4451 | * write and hope for the best. | |
4452 | */ | |
b31e1552 ES |
4453 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4454 | "superblock detected"); | |
914258bf TT |
4455 | clear_buffer_write_io_error(sbh); |
4456 | set_buffer_uptodate(sbh); | |
4457 | } | |
71290b36 TT |
4458 | /* |
4459 | * If the file system is mounted read-only, don't update the | |
4460 | * superblock write time. This avoids updating the superblock | |
4461 | * write time when we are mounting the root file system | |
4462 | * read/only but we need to replay the journal; at that point, | |
4463 | * for people who are east of GMT and who make their clock | |
4464 | * tick in localtime for Windows bug-for-bug compatibility, | |
4465 | * the clock is set in the future, and this will cause e2fsck | |
4466 | * to complain and force a full file system check. | |
4467 | */ | |
4468 | if (!(sb->s_flags & MS_RDONLY)) | |
4469 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4470 | if (sb->s_bdev->bd_part) |
4471 | es->s_kbytes_written = | |
4472 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4473 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4474 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4475 | else |
4476 | es->s_kbytes_written = | |
4477 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4478 | ext4_free_blocks_count_set(es, |
4479 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4480 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4481 | es->s_free_inodes_count = |
4482 | cpu_to_le32(percpu_counter_sum_positive( | |
4483 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
ac27a0ec | 4484 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4485 | ext4_superblock_csum_set(sb); |
ac27a0ec | 4486 | mark_buffer_dirty(sbh); |
914258bf | 4487 | if (sync) { |
c4be0c1d TS |
4488 | error = sync_dirty_buffer(sbh); |
4489 | if (error) | |
4490 | return error; | |
4491 | ||
4492 | error = buffer_write_io_error(sbh); | |
4493 | if (error) { | |
b31e1552 ES |
4494 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4495 | "superblock"); | |
914258bf TT |
4496 | clear_buffer_write_io_error(sbh); |
4497 | set_buffer_uptodate(sbh); | |
4498 | } | |
4499 | } | |
c4be0c1d | 4500 | return error; |
ac27a0ec DK |
4501 | } |
4502 | ||
ac27a0ec DK |
4503 | /* |
4504 | * Have we just finished recovery? If so, and if we are mounting (or | |
4505 | * remounting) the filesystem readonly, then we will end up with a | |
4506 | * consistent fs on disk. Record that fact. | |
4507 | */ | |
2b2d6d01 TT |
4508 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4509 | struct ext4_super_block *es) | |
ac27a0ec | 4510 | { |
617ba13b | 4511 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4512 | |
0390131b FM |
4513 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4514 | BUG_ON(journal != NULL); | |
4515 | return; | |
4516 | } | |
dab291af | 4517 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4518 | if (jbd2_journal_flush(journal) < 0) |
4519 | goto out; | |
4520 | ||
617ba13b | 4521 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4522 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4523 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4524 | ext4_commit_super(sb, 1); |
ac27a0ec | 4525 | } |
7ffe1ea8 HK |
4526 | |
4527 | out: | |
dab291af | 4528 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4529 | } |
4530 | ||
4531 | /* | |
4532 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4533 | * has recorded an error from a previous lifetime, move that error to the | |
4534 | * main filesystem now. | |
4535 | */ | |
2b2d6d01 TT |
4536 | static void ext4_clear_journal_err(struct super_block *sb, |
4537 | struct ext4_super_block *es) | |
ac27a0ec DK |
4538 | { |
4539 | journal_t *journal; | |
4540 | int j_errno; | |
4541 | const char *errstr; | |
4542 | ||
0390131b FM |
4543 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4544 | ||
617ba13b | 4545 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4546 | |
4547 | /* | |
4548 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4549 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4550 | */ |
4551 | ||
dab291af | 4552 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4553 | if (j_errno) { |
4554 | char nbuf[16]; | |
4555 | ||
617ba13b | 4556 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4557 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4558 | "from previous mount: %s", errstr); |
12062ddd | 4559 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4560 | |
617ba13b MC |
4561 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4562 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4563 | ext4_commit_super(sb, 1); |
ac27a0ec | 4564 | |
dab291af | 4565 | jbd2_journal_clear_err(journal); |
d796c52e | 4566 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4567 | } |
4568 | } | |
4569 | ||
4570 | /* | |
4571 | * Force the running and committing transactions to commit, | |
4572 | * and wait on the commit. | |
4573 | */ | |
617ba13b | 4574 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4575 | { |
4576 | journal_t *journal; | |
ac27a0ec DK |
4577 | |
4578 | if (sb->s_flags & MS_RDONLY) | |
4579 | return 0; | |
4580 | ||
617ba13b | 4581 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4582 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4583 | } |
4584 | ||
617ba13b | 4585 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4586 | { |
14ce0cb4 | 4587 | int ret = 0; |
9eddacf9 | 4588 | tid_t target; |
06a407f1 | 4589 | bool needs_barrier = false; |
8d5d02e6 | 4590 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4591 | |
9bffad1e | 4592 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 4593 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
4594 | /* |
4595 | * Writeback quota in non-journalled quota case - journalled quota has | |
4596 | * no dirty dquots | |
4597 | */ | |
4598 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
4599 | /* |
4600 | * Data writeback is possible w/o journal transaction, so barrier must | |
4601 | * being sent at the end of the function. But we can skip it if | |
4602 | * transaction_commit will do it for us. | |
4603 | */ | |
4604 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
4605 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
4606 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
4607 | needs_barrier = true; | |
4608 | ||
8d5d02e6 | 4609 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
9ca92389 | 4610 | if (wait) |
06a407f1 DM |
4611 | ret = jbd2_log_wait_commit(sbi->s_journal, target); |
4612 | } | |
4613 | if (needs_barrier) { | |
4614 | int err; | |
4615 | err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4616 | if (!ret) | |
4617 | ret = err; | |
0390131b | 4618 | } |
06a407f1 DM |
4619 | |
4620 | return ret; | |
4621 | } | |
4622 | ||
4623 | static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) | |
4624 | { | |
4625 | int ret = 0; | |
4626 | ||
4627 | trace_ext4_sync_fs(sb, wait); | |
4628 | flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
06a407f1 DM |
4629 | dquot_writeback_dquots(sb, -1); |
4630 | if (wait && test_opt(sb, BARRIER)) | |
4631 | ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); | |
4632 | ||
14ce0cb4 | 4633 | return ret; |
ac27a0ec DK |
4634 | } |
4635 | ||
4636 | /* | |
4637 | * LVM calls this function before a (read-only) snapshot is created. This | |
4638 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4639 | * |
4640 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4641 | * state independently. It relies on upper layer to stop all data & metadata |
4642 | * modifications. | |
ac27a0ec | 4643 | */ |
c4be0c1d | 4644 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4645 | { |
c4be0c1d TS |
4646 | int error = 0; |
4647 | journal_t *journal; | |
ac27a0ec | 4648 | |
9ca92389 TT |
4649 | if (sb->s_flags & MS_RDONLY) |
4650 | return 0; | |
ac27a0ec | 4651 | |
9ca92389 | 4652 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4653 | |
9ca92389 TT |
4654 | /* Now we set up the journal barrier. */ |
4655 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4656 | |
9ca92389 TT |
4657 | /* |
4658 | * Don't clear the needs_recovery flag if we failed to flush | |
4659 | * the journal. | |
4660 | */ | |
4661 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4662 | if (error < 0) |
4663 | goto out; | |
9ca92389 TT |
4664 | |
4665 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4666 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4667 | error = ext4_commit_super(sb, 1); | |
6b0310fb | 4668 | out: |
8e8ad8a5 | 4669 | /* we rely on upper layer to stop further updates */ |
6b0310fb ES |
4670 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
4671 | return error; | |
ac27a0ec DK |
4672 | } |
4673 | ||
4674 | /* | |
4675 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4676 | * flag here, even though the filesystem is not technically dirty yet. | |
4677 | */ | |
c4be0c1d | 4678 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4679 | { |
9ca92389 TT |
4680 | if (sb->s_flags & MS_RDONLY) |
4681 | return 0; | |
4682 | ||
9ca92389 TT |
4683 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
4684 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4685 | ext4_commit_super(sb, 1); | |
c4be0c1d | 4686 | return 0; |
ac27a0ec DK |
4687 | } |
4688 | ||
673c6100 TT |
4689 | /* |
4690 | * Structure to save mount options for ext4_remount's benefit | |
4691 | */ | |
4692 | struct ext4_mount_options { | |
4693 | unsigned long s_mount_opt; | |
a2595b8a | 4694 | unsigned long s_mount_opt2; |
08cefc7a EB |
4695 | kuid_t s_resuid; |
4696 | kgid_t s_resgid; | |
673c6100 TT |
4697 | unsigned long s_commit_interval; |
4698 | u32 s_min_batch_time, s_max_batch_time; | |
4699 | #ifdef CONFIG_QUOTA | |
4700 | int s_jquota_fmt; | |
4701 | char *s_qf_names[MAXQUOTAS]; | |
4702 | #endif | |
4703 | }; | |
4704 | ||
2b2d6d01 | 4705 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4706 | { |
2b2d6d01 | 4707 | struct ext4_super_block *es; |
617ba13b | 4708 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4709 | unsigned long old_sb_flags; |
617ba13b | 4710 | struct ext4_mount_options old_opts; |
c79d967d | 4711 | int enable_quota = 0; |
8a266467 | 4712 | ext4_group_t g; |
b3881f74 | 4713 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4714 | int err = 0; |
ac27a0ec | 4715 | #ifdef CONFIG_QUOTA |
03dafb5f | 4716 | int i, j; |
ac27a0ec | 4717 | #endif |
d4c402d9 | 4718 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4719 | |
4720 | /* Store the original options */ | |
4721 | old_sb_flags = sb->s_flags; | |
4722 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4723 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4724 | old_opts.s_resuid = sbi->s_resuid; |
4725 | old_opts.s_resgid = sbi->s_resgid; | |
4726 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4727 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4728 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4729 | #ifdef CONFIG_QUOTA |
4730 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4731 | for (i = 0; i < MAXQUOTAS; i++) | |
03dafb5f CG |
4732 | if (sbi->s_qf_names[i]) { |
4733 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4734 | GFP_KERNEL); | |
4735 | if (!old_opts.s_qf_names[i]) { | |
4736 | for (j = 0; j < i; j++) | |
4737 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4738 | kfree(orig_data); |
03dafb5f CG |
4739 | return -ENOMEM; |
4740 | } | |
4741 | } else | |
4742 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4743 | #endif |
b3881f74 TT |
4744 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4745 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4746 | |
4747 | /* | |
4748 | * Allow the "check" option to be passed as a remount option. | |
4749 | */ | |
661aa520 | 4750 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4751 | err = -EINVAL; |
4752 | goto restore_opts; | |
4753 | } | |
4754 | ||
6ae6514b PS |
4755 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
4756 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4757 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4758 | "both data=journal and delalloc"); | |
4759 | err = -EINVAL; | |
4760 | goto restore_opts; | |
4761 | } | |
4762 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
4763 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4764 | "both data=journal and dioread_nolock"); | |
4765 | err = -EINVAL; | |
4766 | goto restore_opts; | |
4767 | } | |
4768 | } | |
4769 | ||
4ab2f15b | 4770 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4771 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4772 | |
4773 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4774 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4775 | |
4776 | es = sbi->s_es; | |
4777 | ||
b3881f74 | 4778 | if (sbi->s_journal) { |
0390131b | 4779 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4780 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4781 | } | |
ac27a0ec | 4782 | |
661aa520 | 4783 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4784 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4785 | err = -EROFS; |
4786 | goto restore_opts; | |
4787 | } | |
4788 | ||
4789 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4790 | err = dquot_suspend(sb, -1); |
4791 | if (err < 0) | |
c79d967d | 4792 | goto restore_opts; |
c79d967d | 4793 | |
ac27a0ec DK |
4794 | /* |
4795 | * First of all, the unconditional stuff we have to do | |
4796 | * to disable replay of the journal when we next remount | |
4797 | */ | |
4798 | sb->s_flags |= MS_RDONLY; | |
4799 | ||
4800 | /* | |
4801 | * OK, test if we are remounting a valid rw partition | |
4802 | * readonly, and if so set the rdonly flag and then | |
4803 | * mark the partition as valid again. | |
4804 | */ | |
617ba13b MC |
4805 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4806 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4807 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4808 | ||
a63c9eb2 | 4809 | if (sbi->s_journal) |
0390131b | 4810 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4811 | } else { |
a13fb1a4 ES |
4812 | /* Make sure we can mount this feature set readwrite */ |
4813 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4814 | err = -EROFS; |
4815 | goto restore_opts; | |
4816 | } | |
8a266467 TT |
4817 | /* |
4818 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4819 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4820 | */ |
4821 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4822 | struct ext4_group_desc *gdp = | |
4823 | ext4_get_group_desc(sb, g, NULL); | |
4824 | ||
feb0ab32 | 4825 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4826 | ext4_msg(sb, KERN_ERR, |
4827 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4828 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4829 | le16_to_cpu(gdp->bg_checksum)); | |
4830 | err = -EINVAL; | |
4831 | goto restore_opts; | |
4832 | } | |
4833 | } | |
4834 | ||
ead6596b ES |
4835 | /* |
4836 | * If we have an unprocessed orphan list hanging | |
4837 | * around from a previously readonly bdev mount, | |
4838 | * require a full umount/remount for now. | |
4839 | */ | |
4840 | if (es->s_last_orphan) { | |
b31e1552 | 4841 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4842 | "remount RDWR because of unprocessed " |
4843 | "orphan inode list. Please " | |
b31e1552 | 4844 | "umount/remount instead"); |
ead6596b ES |
4845 | err = -EINVAL; |
4846 | goto restore_opts; | |
4847 | } | |
4848 | ||
ac27a0ec DK |
4849 | /* |
4850 | * Mounting a RDONLY partition read-write, so reread | |
4851 | * and store the current valid flag. (It may have | |
4852 | * been changed by e2fsck since we originally mounted | |
4853 | * the partition.) | |
4854 | */ | |
0390131b FM |
4855 | if (sbi->s_journal) |
4856 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4857 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4858 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4859 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4860 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4861 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4862 | if (ext4_multi_mount_protect(sb, | |
4863 | le64_to_cpu(es->s_mmp_block))) { | |
4864 | err = -EROFS; | |
4865 | goto restore_opts; | |
4866 | } | |
c79d967d | 4867 | enable_quota = 1; |
ac27a0ec DK |
4868 | } |
4869 | } | |
bfff6873 LC |
4870 | |
4871 | /* | |
4872 | * Reinitialize lazy itable initialization thread based on | |
4873 | * current settings | |
4874 | */ | |
4875 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4876 | ext4_unregister_li_request(sb); | |
4877 | else { | |
4878 | ext4_group_t first_not_zeroed; | |
4879 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4880 | ext4_register_li_request(sb, first_not_zeroed); | |
4881 | } | |
4882 | ||
6fd058f7 | 4883 | ext4_setup_system_zone(sb); |
d096ad0f | 4884 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 4885 | ext4_commit_super(sb, 1); |
0390131b | 4886 | |
ac27a0ec DK |
4887 | #ifdef CONFIG_QUOTA |
4888 | /* Release old quota file names */ | |
4889 | for (i = 0; i < MAXQUOTAS; i++) | |
03dafb5f | 4890 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
4891 | if (enable_quota) { |
4892 | if (sb_any_quota_suspended(sb)) | |
4893 | dquot_resume(sb, -1); | |
4894 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4895 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
4896 | err = ext4_enable_quotas(sb); | |
07724f98 | 4897 | if (err) |
7c319d32 | 4898 | goto restore_opts; |
7c319d32 AK |
4899 | } |
4900 | } | |
ac27a0ec | 4901 | #endif |
d4c402d9 CW |
4902 | |
4903 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4904 | kfree(orig_data); | |
ac27a0ec | 4905 | return 0; |
0b8e58a1 | 4906 | |
ac27a0ec DK |
4907 | restore_opts: |
4908 | sb->s_flags = old_sb_flags; | |
4909 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4910 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4911 | sbi->s_resuid = old_opts.s_resuid; |
4912 | sbi->s_resgid = old_opts.s_resgid; | |
4913 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4914 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4915 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4916 | #ifdef CONFIG_QUOTA |
4917 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4918 | for (i = 0; i < MAXQUOTAS; i++) { | |
03dafb5f | 4919 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
4920 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
4921 | } | |
4922 | #endif | |
d4c402d9 | 4923 | kfree(orig_data); |
ac27a0ec DK |
4924 | return err; |
4925 | } | |
4926 | ||
2b2d6d01 | 4927 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4928 | { |
4929 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4930 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4931 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 4932 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 4933 | u64 fsid; |
d02a9391 | 4934 | s64 bfree; |
27dd4385 | 4935 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 4936 | |
952fc18e TT |
4937 | if (!test_opt(sb, MINIX_DF)) |
4938 | overhead = sbi->s_overhead; | |
ac27a0ec | 4939 | |
617ba13b | 4940 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4941 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 4942 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
4943 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4944 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4945 | /* prevent underflow in case that few free space is available */ |
57042651 | 4946 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
4947 | buf->f_bavail = buf->f_bfree - |
4948 | (ext4_r_blocks_count(es) + resv_blocks); | |
4949 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
4950 | buf->f_bavail = 0; |
4951 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4952 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4953 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4954 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4955 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4956 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4957 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4958 | |
ac27a0ec DK |
4959 | return 0; |
4960 | } | |
4961 | ||
0b8e58a1 AD |
4962 | /* Helper function for writing quotas on sync - we need to start transaction |
4963 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4964 | * Process 1 Process 2 |
617ba13b | 4965 | * ext4_create() quota_sync() |
a269eb18 | 4966 | * jbd2_journal_start() write_dquot() |
871a2931 | 4967 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4968 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4969 | * |
4970 | */ | |
4971 | ||
4972 | #ifdef CONFIG_QUOTA | |
4973 | ||
4974 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4975 | { | |
4c376dca | 4976 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
4977 | } |
4978 | ||
617ba13b | 4979 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4980 | { |
4981 | int ret, err; | |
4982 | handle_t *handle; | |
4983 | struct inode *inode; | |
4984 | ||
4985 | inode = dquot_to_inode(dquot); | |
9924a92a | 4986 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 4987 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4988 | if (IS_ERR(handle)) |
4989 | return PTR_ERR(handle); | |
4990 | ret = dquot_commit(dquot); | |
617ba13b | 4991 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4992 | if (!ret) |
4993 | ret = err; | |
4994 | return ret; | |
4995 | } | |
4996 | ||
617ba13b | 4997 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4998 | { |
4999 | int ret, err; | |
5000 | handle_t *handle; | |
5001 | ||
9924a92a | 5002 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5003 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
5004 | if (IS_ERR(handle)) |
5005 | return PTR_ERR(handle); | |
5006 | ret = dquot_acquire(dquot); | |
617ba13b | 5007 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5008 | if (!ret) |
5009 | ret = err; | |
5010 | return ret; | |
5011 | } | |
5012 | ||
617ba13b | 5013 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
5014 | { |
5015 | int ret, err; | |
5016 | handle_t *handle; | |
5017 | ||
9924a92a | 5018 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 5019 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
5020 | if (IS_ERR(handle)) { |
5021 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
5022 | dquot_release(dquot); | |
ac27a0ec | 5023 | return PTR_ERR(handle); |
9c3013e9 | 5024 | } |
ac27a0ec | 5025 | ret = dquot_release(dquot); |
617ba13b | 5026 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5027 | if (!ret) |
5028 | ret = err; | |
5029 | return ret; | |
5030 | } | |
5031 | ||
617ba13b | 5032 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 5033 | { |
262b4662 JK |
5034 | struct super_block *sb = dquot->dq_sb; |
5035 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5036 | ||
2c8be6b2 | 5037 | /* Are we journaling quotas? */ |
262b4662 JK |
5038 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || |
5039 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 5040 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 5041 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
5042 | } else { |
5043 | return dquot_mark_dquot_dirty(dquot); | |
5044 | } | |
5045 | } | |
5046 | ||
617ba13b | 5047 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
5048 | { |
5049 | int ret, err; | |
5050 | handle_t *handle; | |
5051 | ||
5052 | /* Data block + inode block */ | |
9924a92a | 5053 | handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
5054 | if (IS_ERR(handle)) |
5055 | return PTR_ERR(handle); | |
5056 | ret = dquot_commit_info(sb, type); | |
617ba13b | 5057 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
5058 | if (!ret) |
5059 | ret = err; | |
5060 | return ret; | |
5061 | } | |
5062 | ||
5063 | /* | |
5064 | * Turn on quotas during mount time - we need to find | |
5065 | * the quota file and such... | |
5066 | */ | |
617ba13b | 5067 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 5068 | { |
287a8095 CH |
5069 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
5070 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
5071 | } |
5072 | ||
5073 | /* | |
5074 | * Standard function to be called on quota_on | |
5075 | */ | |
617ba13b | 5076 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 5077 | struct path *path) |
ac27a0ec DK |
5078 | { |
5079 | int err; | |
ac27a0ec DK |
5080 | |
5081 | if (!test_opt(sb, QUOTA)) | |
5082 | return -EINVAL; | |
0623543b | 5083 | |
ac27a0ec | 5084 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 5085 | if (path->dentry->d_sb != sb) |
ac27a0ec | 5086 | return -EXDEV; |
0623543b JK |
5087 | /* Journaling quota? */ |
5088 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 5089 | /* Quotafile not in fs root? */ |
f00c9e44 | 5090 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
5091 | ext4_msg(sb, KERN_WARNING, |
5092 | "Quota file not on filesystem root. " | |
5093 | "Journaled quota will not work"); | |
2b2d6d01 | 5094 | } |
0623543b JK |
5095 | |
5096 | /* | |
5097 | * When we journal data on quota file, we have to flush journal to see | |
5098 | * all updates to the file when we bypass pagecache... | |
5099 | */ | |
0390131b | 5100 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 5101 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
5102 | /* |
5103 | * We don't need to lock updates but journal_flush() could | |
5104 | * otherwise be livelocked... | |
5105 | */ | |
5106 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 5107 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 5108 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 5109 | if (err) |
7ffe1ea8 | 5110 | return err; |
0623543b JK |
5111 | } |
5112 | ||
f00c9e44 | 5113 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
5114 | } |
5115 | ||
7c319d32 AK |
5116 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5117 | unsigned int flags) | |
5118 | { | |
5119 | int err; | |
5120 | struct inode *qf_inode; | |
5121 | unsigned long qf_inums[MAXQUOTAS] = { | |
5122 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
5123 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5124 | }; | |
5125 | ||
5126 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); | |
5127 | ||
5128 | if (!qf_inums[type]) | |
5129 | return -EPERM; | |
5130 | ||
5131 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5132 | if (IS_ERR(qf_inode)) { | |
5133 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5134 | return PTR_ERR(qf_inode); | |
5135 | } | |
5136 | ||
bcb13850 JK |
5137 | /* Don't account quota for quota files to avoid recursion */ |
5138 | qf_inode->i_flags |= S_NOQUOTA; | |
7c319d32 AK |
5139 | err = dquot_enable(qf_inode, type, format_id, flags); |
5140 | iput(qf_inode); | |
5141 | ||
5142 | return err; | |
5143 | } | |
5144 | ||
5145 | /* Enable usage tracking for all quota types. */ | |
5146 | static int ext4_enable_quotas(struct super_block *sb) | |
5147 | { | |
5148 | int type, err = 0; | |
5149 | unsigned long qf_inums[MAXQUOTAS] = { | |
5150 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
5151 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5152 | }; | |
5153 | ||
5154 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
5155 | for (type = 0; type < MAXQUOTAS; type++) { | |
5156 | if (qf_inums[type]) { | |
5157 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5158 | DQUOT_USAGE_ENABLED); | |
5159 | if (err) { | |
5160 | ext4_warning(sb, | |
72ba7450 TT |
5161 | "Failed to enable quota tracking " |
5162 | "(type=%d, err=%d). Please run " | |
5163 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5164 | return err; |
5165 | } | |
5166 | } | |
5167 | } | |
5168 | return 0; | |
5169 | } | |
5170 | ||
5171 | /* | |
5172 | * quota_on function that is used when QUOTA feature is set. | |
5173 | */ | |
5174 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, | |
5175 | int format_id) | |
5176 | { | |
5177 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5178 | return -EINVAL; | |
5179 | ||
5180 | /* | |
5181 | * USAGE was enabled at mount time. Only need to enable LIMITS now. | |
5182 | */ | |
5183 | return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); | |
5184 | } | |
5185 | ||
ca0e05e4 DM |
5186 | static int ext4_quota_off(struct super_block *sb, int type) |
5187 | { | |
21f97697 JK |
5188 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5189 | handle_t *handle; | |
5190 | ||
87009d86 DM |
5191 | /* Force all delayed allocation blocks to be allocated. |
5192 | * Caller already holds s_umount sem */ | |
5193 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5194 | sync_filesystem(sb); |
ca0e05e4 | 5195 | |
0b268590 AG |
5196 | if (!inode) |
5197 | goto out; | |
5198 | ||
21f97697 JK |
5199 | /* Update modification times of quota files when userspace can |
5200 | * start looking at them */ | |
9924a92a | 5201 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5202 | if (IS_ERR(handle)) |
5203 | goto out; | |
5204 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5205 | ext4_mark_inode_dirty(handle, inode); | |
5206 | ext4_journal_stop(handle); | |
5207 | ||
5208 | out: | |
ca0e05e4 DM |
5209 | return dquot_quota_off(sb, type); |
5210 | } | |
5211 | ||
7c319d32 AK |
5212 | /* |
5213 | * quota_off function that is used when QUOTA feature is set. | |
5214 | */ | |
5215 | static int ext4_quota_off_sysfile(struct super_block *sb, int type) | |
5216 | { | |
5217 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5218 | return -EINVAL; | |
5219 | ||
5220 | /* Disable only the limits. */ | |
5221 | return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); | |
5222 | } | |
5223 | ||
ac27a0ec DK |
5224 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5225 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5226 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5227 | * we don't have to be afraid of races */ |
617ba13b | 5228 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5229 | size_t len, loff_t off) |
5230 | { | |
5231 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5232 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5233 | int err = 0; |
5234 | int offset = off & (sb->s_blocksize - 1); | |
5235 | int tocopy; | |
5236 | size_t toread; | |
5237 | struct buffer_head *bh; | |
5238 | loff_t i_size = i_size_read(inode); | |
5239 | ||
5240 | if (off > i_size) | |
5241 | return 0; | |
5242 | if (off+len > i_size) | |
5243 | len = i_size-off; | |
5244 | toread = len; | |
5245 | while (toread > 0) { | |
5246 | tocopy = sb->s_blocksize - offset < toread ? | |
5247 | sb->s_blocksize - offset : toread; | |
617ba13b | 5248 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
5249 | if (err) |
5250 | return err; | |
5251 | if (!bh) /* A hole? */ | |
5252 | memset(data, 0, tocopy); | |
5253 | else | |
5254 | memcpy(data, bh->b_data+offset, tocopy); | |
5255 | brelse(bh); | |
5256 | offset = 0; | |
5257 | toread -= tocopy; | |
5258 | data += tocopy; | |
5259 | blk++; | |
5260 | } | |
5261 | return len; | |
5262 | } | |
5263 | ||
5264 | /* Write to quotafile (we know the transaction is already started and has | |
5265 | * enough credits) */ | |
617ba13b | 5266 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5267 | const char *data, size_t len, loff_t off) |
5268 | { | |
5269 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5270 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5271 | int err = 0; |
5272 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
5273 | struct buffer_head *bh; |
5274 | handle_t *handle = journal_current_handle(); | |
5275 | ||
0390131b | 5276 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5277 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5278 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5279 | (unsigned long long)off, (unsigned long long)len); |
5280 | return -EIO; | |
5281 | } | |
67eeb568 DM |
5282 | /* |
5283 | * Since we account only one data block in transaction credits, | |
5284 | * then it is impossible to cross a block boundary. | |
5285 | */ | |
5286 | if (sb->s_blocksize - offset < len) { | |
5287 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5288 | " cancelled because not block aligned", | |
5289 | (unsigned long long)off, (unsigned long long)len); | |
5290 | return -EIO; | |
5291 | } | |
5292 | ||
67eeb568 DM |
5293 | bh = ext4_bread(handle, inode, blk, 1, &err); |
5294 | if (!bh) | |
5295 | goto out; | |
62d2b5f2 JK |
5296 | err = ext4_journal_get_write_access(handle, bh); |
5297 | if (err) { | |
5298 | brelse(bh); | |
5299 | goto out; | |
ac27a0ec | 5300 | } |
67eeb568 DM |
5301 | lock_buffer(bh); |
5302 | memcpy(bh->b_data+offset, data, len); | |
5303 | flush_dcache_page(bh->b_page); | |
5304 | unlock_buffer(bh); | |
62d2b5f2 | 5305 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5306 | brelse(bh); |
ac27a0ec | 5307 | out: |
0b7f7cef | 5308 | if (err) |
ac27a0ec | 5309 | return err; |
67eeb568 DM |
5310 | if (inode->i_size < off + len) { |
5311 | i_size_write(inode, off + len); | |
617ba13b | 5312 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5313 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5314 | } |
67eeb568 | 5315 | return len; |
ac27a0ec DK |
5316 | } |
5317 | ||
5318 | #endif | |
5319 | ||
152a0836 AV |
5320 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5321 | const char *dev_name, void *data) | |
ac27a0ec | 5322 | { |
152a0836 | 5323 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5324 | } |
5325 | ||
37f328eb | 5326 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5327 | static inline void register_as_ext2(void) |
5328 | { | |
5329 | int err = register_filesystem(&ext2_fs_type); | |
5330 | if (err) | |
5331 | printk(KERN_WARNING | |
5332 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5333 | } | |
5334 | ||
5335 | static inline void unregister_as_ext2(void) | |
5336 | { | |
5337 | unregister_filesystem(&ext2_fs_type); | |
5338 | } | |
2035e776 TT |
5339 | |
5340 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5341 | { | |
5342 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
5343 | return 0; | |
5344 | if (sb->s_flags & MS_RDONLY) | |
5345 | return 1; | |
5346 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
5347 | return 0; | |
5348 | return 1; | |
5349 | } | |
24b58424 TT |
5350 | #else |
5351 | static inline void register_as_ext2(void) { } | |
5352 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5353 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5354 | #endif |
5355 | ||
37f328eb | 5356 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5357 | static inline void register_as_ext3(void) |
5358 | { | |
5359 | int err = register_filesystem(&ext3_fs_type); | |
5360 | if (err) | |
5361 | printk(KERN_WARNING | |
5362 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5363 | } | |
5364 | ||
5365 | static inline void unregister_as_ext3(void) | |
5366 | { | |
5367 | unregister_filesystem(&ext3_fs_type); | |
5368 | } | |
2035e776 TT |
5369 | |
5370 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5371 | { | |
5372 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
5373 | return 0; | |
5374 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
5375 | return 0; | |
5376 | if (sb->s_flags & MS_RDONLY) | |
5377 | return 1; | |
5378 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5379 | return 0; | |
5380 | return 1; | |
5381 | } | |
24b58424 TT |
5382 | #else |
5383 | static inline void register_as_ext3(void) { } | |
5384 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5385 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5386 | #endif |
5387 | ||
03010a33 TT |
5388 | static struct file_system_type ext4_fs_type = { |
5389 | .owner = THIS_MODULE, | |
5390 | .name = "ext4", | |
152a0836 | 5391 | .mount = ext4_mount, |
03010a33 TT |
5392 | .kill_sb = kill_block_super, |
5393 | .fs_flags = FS_REQUIRES_DEV, | |
5394 | }; | |
7f78e035 | 5395 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5396 | |
8f021222 | 5397 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5398 | { |
5399 | struct ext4_features *ef; | |
5400 | int ret = -ENOMEM; | |
5401 | ||
5402 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5403 | if (!ef) | |
5404 | goto out; | |
5405 | ||
5406 | ef->f_kobj.kset = ext4_kset; | |
5407 | init_completion(&ef->f_kobj_unregister); | |
5408 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5409 | "features"); | |
5410 | if (ret) { | |
5411 | kfree(ef); | |
5412 | goto out; | |
5413 | } | |
5414 | ||
5415 | ext4_feat = ef; | |
5416 | ret = 0; | |
5417 | out: | |
5418 | return ret; | |
5419 | } | |
5420 | ||
8f021222 LC |
5421 | static void ext4_exit_feat_adverts(void) |
5422 | { | |
5423 | kobject_put(&ext4_feat->f_kobj); | |
5424 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5425 | kfree(ext4_feat); | |
5426 | } | |
5427 | ||
e9e3bcec ES |
5428 | /* Shared across all ext4 file systems */ |
5429 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5430 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5431 | ||
5dabfc78 | 5432 | static int __init ext4_init_fs(void) |
ac27a0ec | 5433 | { |
e9e3bcec | 5434 | int i, err; |
c9de560d | 5435 | |
07c0c5d8 AV |
5436 | ext4_li_info = NULL; |
5437 | mutex_init(&ext4_li_mtx); | |
5438 | ||
9a4c8019 | 5439 | /* Build-time check for flags consistency */ |
12e9b892 | 5440 | ext4_check_flag_values(); |
e9e3bcec ES |
5441 | |
5442 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5443 | mutex_init(&ext4__aio_mutex[i]); | |
5444 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5445 | } | |
5446 | ||
51865fda | 5447 | err = ext4_init_es(); |
6fd058f7 TT |
5448 | if (err) |
5449 | return err; | |
51865fda ZL |
5450 | |
5451 | err = ext4_init_pageio(); | |
5452 | if (err) | |
5453 | goto out7; | |
5454 | ||
5dabfc78 | 5455 | err = ext4_init_system_zone(); |
bd2d0210 | 5456 | if (err) |
d44651d0 | 5457 | goto out6; |
3197ebdb | 5458 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
0e376b1e TT |
5459 | if (!ext4_kset) { |
5460 | err = -ENOMEM; | |
dd68314c | 5461 | goto out5; |
0e376b1e | 5462 | } |
d44651d0 | 5463 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5464 | |
5465 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5466 | if (err) |
5467 | goto out4; | |
857ac889 | 5468 | |
5dabfc78 | 5469 | err = ext4_init_mballoc(); |
ac27a0ec | 5470 | if (err) |
6fd058f7 | 5471 | goto out3; |
c9de560d | 5472 | |
5dabfc78 | 5473 | err = ext4_init_xattr(); |
c9de560d AT |
5474 | if (err) |
5475 | goto out2; | |
ac27a0ec DK |
5476 | err = init_inodecache(); |
5477 | if (err) | |
5478 | goto out1; | |
24b58424 | 5479 | register_as_ext3(); |
2035e776 | 5480 | register_as_ext2(); |
03010a33 | 5481 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5482 | if (err) |
5483 | goto out; | |
bfff6873 | 5484 | |
ac27a0ec DK |
5485 | return 0; |
5486 | out: | |
24b58424 TT |
5487 | unregister_as_ext2(); |
5488 | unregister_as_ext3(); | |
ac27a0ec DK |
5489 | destroy_inodecache(); |
5490 | out1: | |
5dabfc78 | 5491 | ext4_exit_xattr(); |
c9de560d | 5492 | out2: |
5dabfc78 | 5493 | ext4_exit_mballoc(); |
6fd058f7 | 5494 | out3: |
8f021222 | 5495 | ext4_exit_feat_adverts(); |
dd68314c | 5496 | out4: |
d44651d0 FJ |
5497 | if (ext4_proc_root) |
5498 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5499 | kset_unregister(ext4_kset); |
d44651d0 | 5500 | out5: |
5dabfc78 | 5501 | ext4_exit_system_zone(); |
d44651d0 | 5502 | out6: |
5dabfc78 | 5503 | ext4_exit_pageio(); |
51865fda ZL |
5504 | out7: |
5505 | ext4_exit_es(); | |
5506 | ||
ac27a0ec DK |
5507 | return err; |
5508 | } | |
5509 | ||
5dabfc78 | 5510 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5511 | { |
bfff6873 | 5512 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5513 | unregister_as_ext2(); |
5514 | unregister_as_ext3(); | |
03010a33 | 5515 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5516 | destroy_inodecache(); |
5dabfc78 TT |
5517 | ext4_exit_xattr(); |
5518 | ext4_exit_mballoc(); | |
8f021222 | 5519 | ext4_exit_feat_adverts(); |
9f6200bb | 5520 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5521 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5522 | ext4_exit_system_zone(); |
5523 | ext4_exit_pageio(); | |
dd12ed14 | 5524 | ext4_exit_es(); |
ac27a0ec DK |
5525 | } |
5526 | ||
5527 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5528 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5529 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5530 | module_init(ext4_init_fs) |
5531 | module_exit(ext4_exit_fs) |