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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
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); |
2b2d6d01 TT |
72 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
73 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 74 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 75 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
76 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
77 | const char *dev_name, void *data); | |
2035e776 TT |
78 | static inline int ext2_feature_set_ok(struct super_block *sb); |
79 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
d39195c3 | 80 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
81 | static void ext4_destroy_lazyinit_thread(void); |
82 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 83 | static void ext4_clear_request_list(void); |
27dd4385 | 84 | static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); |
ac27a0ec | 85 | |
2035e776 TT |
86 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
87 | static struct file_system_type ext2_fs_type = { | |
88 | .owner = THIS_MODULE, | |
89 | .name = "ext2", | |
90 | .mount = ext4_mount, | |
91 | .kill_sb = kill_block_super, | |
92 | .fs_flags = FS_REQUIRES_DEV, | |
93 | }; | |
7f78e035 | 94 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 95 | MODULE_ALIAS("ext2"); |
2035e776 TT |
96 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
97 | #else | |
98 | #define IS_EXT2_SB(sb) (0) | |
99 | #endif | |
100 | ||
101 | ||
ba69f9ab JK |
102 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
103 | static struct file_system_type ext3_fs_type = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = "ext3", | |
152a0836 | 106 | .mount = ext4_mount, |
ba69f9ab JK |
107 | .kill_sb = kill_block_super, |
108 | .fs_flags = FS_REQUIRES_DEV, | |
109 | }; | |
7f78e035 | 110 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 111 | MODULE_ALIAS("ext3"); |
ba69f9ab JK |
112 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
113 | #else | |
114 | #define IS_EXT3_SB(sb) (0) | |
115 | #endif | |
bd81d8ee | 116 | |
d25425f8 DW |
117 | static int ext4_verify_csum_type(struct super_block *sb, |
118 | struct ext4_super_block *es) | |
119 | { | |
120 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
121 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
122 | return 1; | |
123 | ||
124 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
125 | } | |
126 | ||
a9c47317 DW |
127 | static __le32 ext4_superblock_csum(struct super_block *sb, |
128 | struct ext4_super_block *es) | |
129 | { | |
130 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
131 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
132 | __u32 csum; | |
133 | ||
134 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
135 | ||
136 | return cpu_to_le32(csum); | |
137 | } | |
138 | ||
139 | int ext4_superblock_csum_verify(struct super_block *sb, | |
140 | struct ext4_super_block *es) | |
141 | { | |
142 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
143 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
144 | return 1; | |
145 | ||
146 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
147 | } | |
148 | ||
06db49e6 | 149 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 150 | { |
06db49e6 TT |
151 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
152 | ||
a9c47317 DW |
153 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, |
154 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
155 | return; | |
156 | ||
157 | es->s_checksum = ext4_superblock_csum(sb, es); | |
158 | } | |
159 | ||
9933fc0a TT |
160 | void *ext4_kvmalloc(size_t size, gfp_t flags) |
161 | { | |
162 | void *ret; | |
163 | ||
164 | ret = kmalloc(size, flags); | |
165 | if (!ret) | |
166 | ret = __vmalloc(size, flags, PAGE_KERNEL); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | void *ext4_kvzalloc(size_t size, gfp_t flags) | |
171 | { | |
172 | void *ret; | |
173 | ||
db9481c0 | 174 | ret = kzalloc(size, flags); |
9933fc0a TT |
175 | if (!ret) |
176 | ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); | |
177 | return ret; | |
178 | } | |
179 | ||
180 | void ext4_kvfree(void *ptr) | |
181 | { | |
182 | if (is_vmalloc_addr(ptr)) | |
183 | vfree(ptr); | |
184 | else | |
185 | kfree(ptr); | |
186 | ||
187 | } | |
188 | ||
8fadc143 AR |
189 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
190 | struct ext4_group_desc *bg) | |
bd81d8ee | 191 | { |
3a14589c | 192 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 193 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 194 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
195 | } |
196 | ||
8fadc143 AR |
197 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
198 | struct ext4_group_desc *bg) | |
bd81d8ee | 199 | { |
5272f837 | 200 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 201 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 202 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
203 | } |
204 | ||
8fadc143 AR |
205 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
206 | struct ext4_group_desc *bg) | |
bd81d8ee | 207 | { |
5272f837 | 208 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 209 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 210 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
211 | } |
212 | ||
021b65bb TT |
213 | __u32 ext4_free_group_clusters(struct super_block *sb, |
214 | struct ext4_group_desc *bg) | |
560671a0 AK |
215 | { |
216 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
217 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 218 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
219 | } |
220 | ||
221 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
222 | struct ext4_group_desc *bg) | |
223 | { | |
224 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
225 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 226 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
227 | } |
228 | ||
229 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
230 | struct ext4_group_desc *bg) | |
231 | { | |
232 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
233 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 234 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
235 | } |
236 | ||
237 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
238 | struct ext4_group_desc *bg) | |
239 | { | |
240 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
241 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 242 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
243 | } |
244 | ||
8fadc143 AR |
245 | void ext4_block_bitmap_set(struct super_block *sb, |
246 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 247 | { |
3a14589c | 248 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
249 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
250 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
251 | } |
252 | ||
8fadc143 AR |
253 | void ext4_inode_bitmap_set(struct super_block *sb, |
254 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 255 | { |
5272f837 | 256 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
257 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
258 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
259 | } |
260 | ||
8fadc143 AR |
261 | void ext4_inode_table_set(struct super_block *sb, |
262 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 263 | { |
5272f837 | 264 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
265 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
266 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
267 | } |
268 | ||
021b65bb TT |
269 | void ext4_free_group_clusters_set(struct super_block *sb, |
270 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
271 | { |
272 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
273 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
274 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
275 | } | |
276 | ||
277 | void ext4_free_inodes_set(struct super_block *sb, | |
278 | struct ext4_group_desc *bg, __u32 count) | |
279 | { | |
280 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
281 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
282 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
283 | } | |
284 | ||
285 | void ext4_used_dirs_set(struct super_block *sb, | |
286 | struct ext4_group_desc *bg, __u32 count) | |
287 | { | |
288 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
289 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
290 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
291 | } | |
292 | ||
293 | void ext4_itable_unused_set(struct super_block *sb, | |
294 | struct ext4_group_desc *bg, __u32 count) | |
295 | { | |
296 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
297 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
298 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
299 | } | |
300 | ||
d3d1faf6 | 301 | |
1c13d5c0 TT |
302 | static void __save_error_info(struct super_block *sb, const char *func, |
303 | unsigned int line) | |
304 | { | |
305 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
306 | ||
307 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
308 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
309 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
310 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
311 | es->s_last_error_line = cpu_to_le32(line); | |
312 | if (!es->s_first_error_time) { | |
313 | es->s_first_error_time = es->s_last_error_time; | |
314 | strncpy(es->s_first_error_func, func, | |
315 | sizeof(es->s_first_error_func)); | |
316 | es->s_first_error_line = cpu_to_le32(line); | |
317 | es->s_first_error_ino = es->s_last_error_ino; | |
318 | es->s_first_error_block = es->s_last_error_block; | |
319 | } | |
66e61a9e TT |
320 | /* |
321 | * Start the daily error reporting function if it hasn't been | |
322 | * started already | |
323 | */ | |
324 | if (!es->s_error_count) | |
325 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
ba39ebb6 | 326 | le32_add_cpu(&es->s_error_count, 1); |
1c13d5c0 TT |
327 | } |
328 | ||
329 | static void save_error_info(struct super_block *sb, const char *func, | |
330 | unsigned int line) | |
331 | { | |
332 | __save_error_info(sb, func, line); | |
333 | ext4_commit_super(sb, 1); | |
334 | } | |
335 | ||
7c2e7087 TT |
336 | /* |
337 | * The del_gendisk() function uninitializes the disk-specific data | |
338 | * structures, including the bdi structure, without telling anyone | |
339 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
340 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
341 | * This is a kludge to prevent these oops until we can put in a proper | |
342 | * hook in del_gendisk() to inform the VFS and file system layers. | |
343 | */ | |
344 | static int block_device_ejected(struct super_block *sb) | |
345 | { | |
346 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
347 | struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; | |
348 | ||
349 | return bdi->dev == NULL; | |
350 | } | |
351 | ||
18aadd47 BJ |
352 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
353 | { | |
354 | struct super_block *sb = journal->j_private; | |
355 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
356 | int error = is_journal_aborted(journal); | |
5d3ee208 | 357 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 358 | |
5d3ee208 | 359 | BUG_ON(txn->t_state == T_FINISHED); |
18aadd47 | 360 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
361 | while (!list_empty(&txn->t_private_list)) { |
362 | jce = list_entry(txn->t_private_list.next, | |
363 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
364 | list_del_init(&jce->jce_list); |
365 | spin_unlock(&sbi->s_md_lock); | |
366 | jce->jce_func(sb, jce, error); | |
367 | spin_lock(&sbi->s_md_lock); | |
368 | } | |
369 | spin_unlock(&sbi->s_md_lock); | |
370 | } | |
1c13d5c0 | 371 | |
ac27a0ec DK |
372 | /* Deal with the reporting of failure conditions on a filesystem such as |
373 | * inconsistencies detected or read IO failures. | |
374 | * | |
375 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 376 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
377 | * write ordering constraints on the superblock which prevent us from |
378 | * writing it out straight away; and given that the journal is about to | |
379 | * be aborted, we can't rely on the current, or future, transactions to | |
380 | * write out the superblock safely. | |
381 | * | |
dab291af | 382 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 383 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
384 | * that error until we've noted it down and cleared it. |
385 | */ | |
386 | ||
617ba13b | 387 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 388 | { |
ac27a0ec DK |
389 | if (sb->s_flags & MS_RDONLY) |
390 | return; | |
391 | ||
2b2d6d01 | 392 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 393 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 394 | |
4ab2f15b | 395 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 396 | if (journal) |
dab291af | 397 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 398 | } |
2b2d6d01 | 399 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 400 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
401 | sb->s_flags |= MS_RDONLY; |
402 | } | |
ac27a0ec | 403 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 404 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
405 | sb->s_id); |
406 | } | |
407 | ||
12062ddd | 408 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 409 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 410 | { |
0ff2ea7d | 411 | struct va_format vaf; |
ac27a0ec DK |
412 | va_list args; |
413 | ||
414 | va_start(args, fmt); | |
0ff2ea7d JP |
415 | vaf.fmt = fmt; |
416 | vaf.va = &args; | |
417 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
418 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec | 419 | va_end(args); |
f3fc0210 | 420 | save_error_info(sb, function, line); |
ac27a0ec | 421 | |
617ba13b | 422 | ext4_handle_error(sb); |
ac27a0ec DK |
423 | } |
424 | ||
c398eda0 TT |
425 | void ext4_error_inode(struct inode *inode, const char *function, |
426 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
427 | const char *fmt, ...) |
428 | { | |
429 | va_list args; | |
f7c21177 | 430 | struct va_format vaf; |
1c13d5c0 | 431 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 432 | |
1c13d5c0 TT |
433 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
434 | es->s_last_error_block = cpu_to_le64(block); | |
435 | save_error_info(inode->i_sb, function, line); | |
273df556 | 436 | va_start(args, fmt); |
f7c21177 TT |
437 | vaf.fmt = fmt; |
438 | vaf.va = &args; | |
c398eda0 | 439 | if (block) |
d9ee81da JP |
440 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " |
441 | "inode #%lu: block %llu: comm %s: %pV\n", | |
442 | inode->i_sb->s_id, function, line, inode->i_ino, | |
443 | block, current->comm, &vaf); | |
444 | else | |
445 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
446 | "inode #%lu: comm %s: %pV\n", | |
447 | inode->i_sb->s_id, function, line, inode->i_ino, | |
448 | current->comm, &vaf); | |
273df556 FM |
449 | va_end(args); |
450 | ||
451 | ext4_handle_error(inode->i_sb); | |
452 | } | |
453 | ||
c398eda0 | 454 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
455 | unsigned int line, ext4_fsblk_t block, |
456 | const char *fmt, ...) | |
273df556 FM |
457 | { |
458 | va_list args; | |
f7c21177 | 459 | struct va_format vaf; |
1c13d5c0 | 460 | struct ext4_super_block *es; |
496ad9aa | 461 | struct inode *inode = file_inode(file); |
273df556 FM |
462 | char pathname[80], *path; |
463 | ||
1c13d5c0 TT |
464 | es = EXT4_SB(inode->i_sb)->s_es; |
465 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
466 | save_error_info(inode->i_sb, function, line); | |
273df556 | 467 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 468 | if (IS_ERR(path)) |
273df556 | 469 | path = "(unknown)"; |
f7c21177 TT |
470 | va_start(args, fmt); |
471 | vaf.fmt = fmt; | |
472 | vaf.va = &args; | |
d9ee81da JP |
473 | if (block) |
474 | printk(KERN_CRIT | |
475 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
476 | "block %llu: comm %s: path %s: %pV\n", | |
477 | inode->i_sb->s_id, function, line, inode->i_ino, | |
478 | block, current->comm, path, &vaf); | |
479 | else | |
480 | printk(KERN_CRIT | |
481 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
482 | "comm %s: path %s: %pV\n", | |
483 | inode->i_sb->s_id, function, line, inode->i_ino, | |
484 | current->comm, path, &vaf); | |
273df556 FM |
485 | va_end(args); |
486 | ||
487 | ext4_handle_error(inode->i_sb); | |
488 | } | |
489 | ||
722887dd TT |
490 | const char *ext4_decode_error(struct super_block *sb, int errno, |
491 | char nbuf[16]) | |
ac27a0ec DK |
492 | { |
493 | char *errstr = NULL; | |
494 | ||
495 | switch (errno) { | |
496 | case -EIO: | |
497 | errstr = "IO failure"; | |
498 | break; | |
499 | case -ENOMEM: | |
500 | errstr = "Out of memory"; | |
501 | break; | |
502 | case -EROFS: | |
78f1ddbb TT |
503 | if (!sb || (EXT4_SB(sb)->s_journal && |
504 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
505 | errstr = "Journal has aborted"; |
506 | else | |
507 | errstr = "Readonly filesystem"; | |
508 | break; | |
509 | default: | |
510 | /* If the caller passed in an extra buffer for unknown | |
511 | * errors, textualise them now. Else we just return | |
512 | * NULL. */ | |
513 | if (nbuf) { | |
514 | /* Check for truncated error codes... */ | |
515 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
516 | errstr = nbuf; | |
517 | } | |
518 | break; | |
519 | } | |
520 | ||
521 | return errstr; | |
522 | } | |
523 | ||
617ba13b | 524 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
525 | * automatically and invokes the appropriate error response. */ |
526 | ||
c398eda0 TT |
527 | void __ext4_std_error(struct super_block *sb, const char *function, |
528 | unsigned int line, int errno) | |
ac27a0ec DK |
529 | { |
530 | char nbuf[16]; | |
531 | const char *errstr; | |
532 | ||
533 | /* Special case: if the error is EROFS, and we're not already | |
534 | * inside a transaction, then there's really no point in logging | |
535 | * an error. */ | |
536 | if (errno == -EROFS && journal_current_handle() == NULL && | |
537 | (sb->s_flags & MS_RDONLY)) | |
538 | return; | |
539 | ||
617ba13b | 540 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
541 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
542 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 543 | save_error_info(sb, function, line); |
ac27a0ec | 544 | |
617ba13b | 545 | ext4_handle_error(sb); |
ac27a0ec DK |
546 | } |
547 | ||
548 | /* | |
617ba13b | 549 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
550 | * abort function may be used to deal with unrecoverable failures such |
551 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
552 | * | |
553 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
554 | * unless the error response on the fs has been set to panic in which | |
555 | * case we take the easy way out and panic immediately. | |
556 | */ | |
557 | ||
c67d859e | 558 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 559 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
560 | { |
561 | va_list args; | |
562 | ||
1c13d5c0 | 563 | save_error_info(sb, function, line); |
ac27a0ec | 564 | va_start(args, fmt); |
c398eda0 TT |
565 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
566 | function, line); | |
ac27a0ec DK |
567 | vprintk(fmt, args); |
568 | printk("\n"); | |
569 | va_end(args); | |
570 | ||
1c13d5c0 TT |
571 | if ((sb->s_flags & MS_RDONLY) == 0) { |
572 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
573 | sb->s_flags |= MS_RDONLY; | |
574 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
575 | if (EXT4_SB(sb)->s_journal) | |
576 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
577 | save_error_info(sb, function, line); | |
578 | } | |
ac27a0ec | 579 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 580 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
581 | } |
582 | ||
0ff2ea7d | 583 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 584 | { |
0ff2ea7d | 585 | struct va_format vaf; |
b31e1552 ES |
586 | va_list args; |
587 | ||
588 | va_start(args, fmt); | |
0ff2ea7d JP |
589 | vaf.fmt = fmt; |
590 | vaf.va = &args; | |
591 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
592 | va_end(args); |
593 | } | |
594 | ||
12062ddd | 595 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 596 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 597 | { |
0ff2ea7d | 598 | struct va_format vaf; |
ac27a0ec DK |
599 | va_list args; |
600 | ||
601 | va_start(args, fmt); | |
0ff2ea7d JP |
602 | vaf.fmt = fmt; |
603 | vaf.va = &args; | |
604 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
605 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
606 | va_end(args); |
607 | } | |
608 | ||
e29136f8 TT |
609 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
610 | struct super_block *sb, ext4_group_t grp, | |
611 | unsigned long ino, ext4_fsblk_t block, | |
612 | const char *fmt, ...) | |
5d1b1b3f AK |
613 | __releases(bitlock) |
614 | __acquires(bitlock) | |
615 | { | |
0ff2ea7d | 616 | struct va_format vaf; |
5d1b1b3f AK |
617 | va_list args; |
618 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
619 | ||
1c13d5c0 TT |
620 | es->s_last_error_ino = cpu_to_le32(ino); |
621 | es->s_last_error_block = cpu_to_le64(block); | |
622 | __save_error_info(sb, function, line); | |
0ff2ea7d | 623 | |
5d1b1b3f | 624 | va_start(args, fmt); |
0ff2ea7d JP |
625 | |
626 | vaf.fmt = fmt; | |
627 | vaf.va = &args; | |
21149d61 | 628 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
629 | sb->s_id, function, line, grp); |
630 | if (ino) | |
0ff2ea7d | 631 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 632 | if (block) |
0ff2ea7d JP |
633 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
634 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
635 | va_end(args); |
636 | ||
637 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 638 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
639 | return; |
640 | } | |
1c13d5c0 | 641 | |
5d1b1b3f AK |
642 | ext4_unlock_group(sb, grp); |
643 | ext4_handle_error(sb); | |
644 | /* | |
645 | * We only get here in the ERRORS_RO case; relocking the group | |
646 | * may be dangerous, but nothing bad will happen since the | |
647 | * filesystem will have already been marked read/only and the | |
648 | * journal has been aborted. We return 1 as a hint to callers | |
649 | * who might what to use the return value from | |
25985edc | 650 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
651 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
652 | * aggressively from the ext4 function in question, with a | |
653 | * more appropriate error code. | |
654 | */ | |
655 | ext4_lock_group(sb, grp); | |
656 | return; | |
657 | } | |
658 | ||
617ba13b | 659 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 660 | { |
617ba13b | 661 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 662 | |
617ba13b | 663 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
664 | return; |
665 | ||
12062ddd | 666 | ext4_warning(sb, |
ac27a0ec DK |
667 | "updating to rev %d because of new feature flag, " |
668 | "running e2fsck is recommended", | |
617ba13b | 669 | EXT4_DYNAMIC_REV); |
ac27a0ec | 670 | |
617ba13b MC |
671 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
672 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
673 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
674 | /* leave es->s_feature_*compat flags alone */ |
675 | /* es->s_uuid will be set by e2fsck if empty */ | |
676 | ||
677 | /* | |
678 | * The rest of the superblock fields should be zero, and if not it | |
679 | * means they are likely already in use, so leave them alone. We | |
680 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
681 | */ | |
682 | } | |
683 | ||
684 | /* | |
685 | * Open the external journal device | |
686 | */ | |
b31e1552 | 687 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
688 | { |
689 | struct block_device *bdev; | |
690 | char b[BDEVNAME_SIZE]; | |
691 | ||
d4d77629 | 692 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
693 | if (IS_ERR(bdev)) |
694 | goto fail; | |
695 | return bdev; | |
696 | ||
697 | fail: | |
b31e1552 | 698 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
699 | __bdevname(dev, b), PTR_ERR(bdev)); |
700 | return NULL; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Release the journal device | |
705 | */ | |
617ba13b | 706 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 707 | { |
e525fd89 | 708 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
709 | } |
710 | ||
617ba13b | 711 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
712 | { |
713 | struct block_device *bdev; | |
714 | int ret = -ENODEV; | |
715 | ||
716 | bdev = sbi->journal_bdev; | |
717 | if (bdev) { | |
617ba13b | 718 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
719 | sbi->journal_bdev = NULL; |
720 | } | |
721 | return ret; | |
722 | } | |
723 | ||
724 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
725 | { | |
617ba13b | 726 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
727 | } |
728 | ||
617ba13b | 729 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
730 | { |
731 | struct list_head *l; | |
732 | ||
b31e1552 ES |
733 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
734 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
735 | |
736 | printk(KERN_ERR "sb_info orphan list:\n"); | |
737 | list_for_each(l, &sbi->s_orphan) { | |
738 | struct inode *inode = orphan_list_entry(l); | |
739 | printk(KERN_ERR " " | |
740 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
741 | inode->i_sb->s_id, inode->i_ino, inode, | |
742 | inode->i_mode, inode->i_nlink, | |
743 | NEXT_ORPHAN(inode)); | |
744 | } | |
745 | } | |
746 | ||
2b2d6d01 | 747 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 748 | { |
617ba13b MC |
749 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
750 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 751 | int i, err; |
ac27a0ec | 752 | |
857ac889 | 753 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
754 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
755 | ||
4c0425ff MC |
756 | flush_workqueue(sbi->dio_unwritten_wq); |
757 | destroy_workqueue(sbi->dio_unwritten_wq); | |
758 | ||
0390131b FM |
759 | if (sbi->s_journal) { |
760 | err = jbd2_journal_destroy(sbi->s_journal); | |
761 | sbi->s_journal = NULL; | |
762 | if (err < 0) | |
c67d859e | 763 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 764 | } |
d4edac31 | 765 | |
74cd15cd | 766 | ext4_es_unregister_shrinker(sb); |
a1c6c569 | 767 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
768 | ext4_release_system_zone(sb); |
769 | ext4_mb_release(sb); | |
770 | ext4_ext_release(sb); | |
771 | ext4_xattr_put_super(sb); | |
772 | ||
ac27a0ec | 773 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 774 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 775 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 776 | } |
58c5873a | 777 | if (!(sb->s_flags & MS_RDONLY)) |
a8e25a83 AB |
778 | ext4_commit_super(sb, 1); |
779 | ||
240799cd | 780 | if (sbi->s_proc) { |
66acdcf4 | 781 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 782 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 783 | } |
3197ebdb | 784 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
785 | |
786 | for (i = 0; i < sbi->s_gdb_count; i++) | |
787 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 788 | ext4_kvfree(sbi->s_group_desc); |
9933fc0a | 789 | ext4_kvfree(sbi->s_flex_groups); |
57042651 | 790 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ac27a0ec DK |
791 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
792 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 793 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
1ac6466f | 794 | percpu_counter_destroy(&sbi->s_extent_cache_cnt); |
ac27a0ec DK |
795 | brelse(sbi->s_sbh); |
796 | #ifdef CONFIG_QUOTA | |
797 | for (i = 0; i < MAXQUOTAS; i++) | |
798 | kfree(sbi->s_qf_names[i]); | |
799 | #endif | |
800 | ||
801 | /* Debugging code just in case the in-memory inode orphan list | |
802 | * isn't empty. The on-disk one can be non-empty if we've | |
803 | * detected an error and taken the fs readonly, but the | |
804 | * in-memory list had better be clean by this point. */ | |
805 | if (!list_empty(&sbi->s_orphan)) | |
806 | dump_orphan_list(sb, sbi); | |
807 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
808 | ||
f98393a6 | 809 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
810 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
811 | /* | |
812 | * Invalidate the journal device's buffers. We don't want them | |
813 | * floating about in memory - the physical journal device may | |
814 | * hotswapped, and it breaks the `ro-after' testing code. | |
815 | */ | |
816 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 817 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 818 | ext4_blkdev_remove(sbi); |
ac27a0ec | 819 | } |
c5e06d10 JL |
820 | if (sbi->s_mmp_tsk) |
821 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec | 822 | sb->s_fs_info = NULL; |
3197ebdb TT |
823 | /* |
824 | * Now that we are completely done shutting down the | |
825 | * superblock, we need to actually destroy the kobject. | |
826 | */ | |
3197ebdb TT |
827 | kobject_put(&sbi->s_kobj); |
828 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
829 | if (sbi->s_chksum_driver) |
830 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 831 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 832 | kfree(sbi); |
ac27a0ec DK |
833 | } |
834 | ||
e18b890b | 835 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
836 | |
837 | /* | |
838 | * Called inside transaction, so use GFP_NOFS | |
839 | */ | |
617ba13b | 840 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 841 | { |
617ba13b | 842 | struct ext4_inode_info *ei; |
ac27a0ec | 843 | |
e6b4f8da | 844 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
845 | if (!ei) |
846 | return NULL; | |
0b8e58a1 | 847 | |
ac27a0ec | 848 | ei->vfs_inode.i_version = 1; |
c9de560d AT |
849 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
850 | spin_lock_init(&ei->i_prealloc_lock); | |
9a26b661 ZL |
851 | ext4_es_init_tree(&ei->i_es_tree); |
852 | rwlock_init(&ei->i_es_lock); | |
74cd15cd ZL |
853 | INIT_LIST_HEAD(&ei->i_es_lru); |
854 | ei->i_es_lru_nr = 0; | |
d2a17637 MC |
855 | ei->i_reserved_data_blocks = 0; |
856 | ei->i_reserved_meta_blocks = 0; | |
857 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 858 | ei->i_da_metadata_calc_len = 0; |
7e731bc9 | 859 | ei->i_da_metadata_calc_last_lblock = 0; |
d2a17637 | 860 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
861 | #ifdef CONFIG_QUOTA |
862 | ei->i_reserved_quota = 0; | |
863 | #endif | |
8aefcd55 | 864 | ei->jinode = NULL; |
c7064ef1 | 865 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 866 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
867 | ei->i_sync_tid = 0; |
868 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 869 | atomic_set(&ei->i_ioend_count, 0); |
e27f41e1 | 870 | atomic_set(&ei->i_unwritten, 0); |
84c17543 | 871 | INIT_WORK(&ei->i_unwritten_work, ext4_end_io_work); |
0b8e58a1 | 872 | |
ac27a0ec DK |
873 | return &ei->vfs_inode; |
874 | } | |
875 | ||
7ff9c073 TT |
876 | static int ext4_drop_inode(struct inode *inode) |
877 | { | |
878 | int drop = generic_drop_inode(inode); | |
879 | ||
880 | trace_ext4_drop_inode(inode, drop); | |
881 | return drop; | |
882 | } | |
883 | ||
fa0d7e3d NP |
884 | static void ext4_i_callback(struct rcu_head *head) |
885 | { | |
886 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
887 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
888 | } | |
889 | ||
617ba13b | 890 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 891 | { |
9f7dd93d | 892 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
893 | ext4_msg(inode->i_sb, KERN_ERR, |
894 | "Inode %lu (%p): orphan list check failed!", | |
895 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
896 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
897 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
898 | true); | |
899 | dump_stack(); | |
900 | } | |
fa0d7e3d | 901 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
902 | } |
903 | ||
51cc5068 | 904 | static void init_once(void *foo) |
ac27a0ec | 905 | { |
617ba13b | 906 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 907 | |
a35afb83 | 908 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 909 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 910 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 911 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
912 | } |
913 | ||
914 | static int init_inodecache(void) | |
915 | { | |
617ba13b MC |
916 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
917 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
918 | 0, (SLAB_RECLAIM_ACCOUNT| |
919 | SLAB_MEM_SPREAD), | |
20c2df83 | 920 | init_once); |
617ba13b | 921 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
922 | return -ENOMEM; |
923 | return 0; | |
924 | } | |
925 | ||
926 | static void destroy_inodecache(void) | |
927 | { | |
8c0a8537 KS |
928 | /* |
929 | * Make sure all delayed rcu free inodes are flushed before we | |
930 | * destroy cache. | |
931 | */ | |
932 | rcu_barrier(); | |
617ba13b | 933 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
934 | } |
935 | ||
0930fcc1 | 936 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 937 | { |
0930fcc1 | 938 | invalidate_inode_buffers(inode); |
dbd5768f | 939 | clear_inode(inode); |
9f754758 | 940 | dquot_drop(inode); |
c2ea3fde | 941 | ext4_discard_preallocations(inode); |
51865fda | 942 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
74cd15cd | 943 | ext4_es_lru_del(inode); |
8aefcd55 TT |
944 | if (EXT4_I(inode)->jinode) { |
945 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
946 | EXT4_I(inode)->jinode); | |
947 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
948 | EXT4_I(inode)->jinode = NULL; | |
949 | } | |
ac27a0ec DK |
950 | } |
951 | ||
1b961ac0 | 952 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 953 | u64 ino, u32 generation) |
ac27a0ec | 954 | { |
ac27a0ec | 955 | struct inode *inode; |
ac27a0ec | 956 | |
617ba13b | 957 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 958 | return ERR_PTR(-ESTALE); |
617ba13b | 959 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
960 | return ERR_PTR(-ESTALE); |
961 | ||
962 | /* iget isn't really right if the inode is currently unallocated!! | |
963 | * | |
617ba13b | 964 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
965 | * deleted, so we should be safe. |
966 | * | |
967 | * Currently we don't know the generation for parent directory, so | |
968 | * a generation of 0 means "accept any" | |
969 | */ | |
1d1fe1ee DH |
970 | inode = ext4_iget(sb, ino); |
971 | if (IS_ERR(inode)) | |
972 | return ERR_CAST(inode); | |
973 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
974 | iput(inode); |
975 | return ERR_PTR(-ESTALE); | |
976 | } | |
1b961ac0 CH |
977 | |
978 | return inode; | |
979 | } | |
980 | ||
981 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 982 | int fh_len, int fh_type) |
1b961ac0 CH |
983 | { |
984 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
985 | ext4_nfs_get_inode); | |
986 | } | |
987 | ||
988 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 989 | int fh_len, int fh_type) |
1b961ac0 CH |
990 | { |
991 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
992 | ext4_nfs_get_inode); | |
ac27a0ec DK |
993 | } |
994 | ||
c39a7f84 TO |
995 | /* |
996 | * Try to release metadata pages (indirect blocks, directories) which are | |
997 | * mapped via the block device. Since these pages could have journal heads | |
998 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
999 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1000 | */ | |
0b8e58a1 AD |
1001 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1002 | gfp_t wait) | |
c39a7f84 TO |
1003 | { |
1004 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1005 | ||
1006 | WARN_ON(PageChecked(page)); | |
1007 | if (!page_has_buffers(page)) | |
1008 | return 0; | |
1009 | if (journal) | |
1010 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1011 | wait & ~__GFP_WAIT); | |
1012 | return try_to_free_buffers(page); | |
1013 | } | |
1014 | ||
ac27a0ec | 1015 | #ifdef CONFIG_QUOTA |
af5bc92d | 1016 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1017 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1018 | |
617ba13b MC |
1019 | static int ext4_write_dquot(struct dquot *dquot); |
1020 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1021 | static int ext4_release_dquot(struct dquot *dquot); | |
1022 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1023 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1024 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1025 | struct path *path); |
7c319d32 AK |
1026 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, |
1027 | int format_id); | |
ca0e05e4 | 1028 | static int ext4_quota_off(struct super_block *sb, int type); |
7c319d32 | 1029 | static int ext4_quota_off_sysfile(struct super_block *sb, int type); |
617ba13b MC |
1030 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1031 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1032 | size_t len, loff_t off); |
617ba13b | 1033 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1034 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1035 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1036 | unsigned int flags); | |
1037 | static int ext4_enable_quotas(struct super_block *sb); | |
ac27a0ec | 1038 | |
61e225dc | 1039 | static const struct dquot_operations ext4_quota_operations = { |
60e58e0f | 1040 | .get_reserved_space = ext4_get_reserved_space, |
617ba13b MC |
1041 | .write_dquot = ext4_write_dquot, |
1042 | .acquire_dquot = ext4_acquire_dquot, | |
1043 | .release_dquot = ext4_release_dquot, | |
1044 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1045 | .write_info = ext4_write_info, |
1046 | .alloc_dquot = dquot_alloc, | |
1047 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1048 | }; |
1049 | ||
0d54b217 | 1050 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1051 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1052 | .quota_off = ext4_quota_off, |
287a8095 CH |
1053 | .quota_sync = dquot_quota_sync, |
1054 | .get_info = dquot_get_dqinfo, | |
1055 | .set_info = dquot_set_dqinfo, | |
1056 | .get_dqblk = dquot_get_dqblk, | |
1057 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec | 1058 | }; |
7c319d32 AK |
1059 | |
1060 | static const struct quotactl_ops ext4_qctl_sysfile_operations = { | |
1061 | .quota_on_meta = ext4_quota_on_sysfile, | |
1062 | .quota_off = ext4_quota_off_sysfile, | |
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 | |
1068 | }; | |
ac27a0ec DK |
1069 | #endif |
1070 | ||
ee9b6d61 | 1071 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1072 | .alloc_inode = ext4_alloc_inode, |
1073 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1074 | .write_inode = ext4_write_inode, |
1075 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1076 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1077 | .evict_inode = ext4_evict_inode, |
617ba13b | 1078 | .put_super = ext4_put_super, |
617ba13b | 1079 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1080 | .freeze_fs = ext4_freeze, |
1081 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1082 | .statfs = ext4_statfs, |
1083 | .remount_fs = ext4_remount, | |
617ba13b | 1084 | .show_options = ext4_show_options, |
ac27a0ec | 1085 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1086 | .quota_read = ext4_quota_read, |
1087 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1088 | #endif |
c39a7f84 | 1089 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1090 | }; |
1091 | ||
9ca92389 TT |
1092 | static const struct super_operations ext4_nojournal_sops = { |
1093 | .alloc_inode = ext4_alloc_inode, | |
1094 | .destroy_inode = ext4_destroy_inode, | |
1095 | .write_inode = ext4_write_inode, | |
1096 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1097 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1098 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1099 | .put_super = ext4_put_super, |
1100 | .statfs = ext4_statfs, | |
1101 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1102 | .show_options = ext4_show_options, |
1103 | #ifdef CONFIG_QUOTA | |
1104 | .quota_read = ext4_quota_read, | |
1105 | .quota_write = ext4_quota_write, | |
1106 | #endif | |
1107 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1108 | }; | |
1109 | ||
39655164 | 1110 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1111 | .fh_to_dentry = ext4_fh_to_dentry, |
1112 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1113 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1114 | }; |
1115 | ||
1116 | enum { | |
1117 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1118 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
72578c33 | 1119 | Opt_nouid32, Opt_debug, Opt_removed, |
ac27a0ec | 1120 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
72578c33 | 1121 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
30773840 | 1122 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
43e625d8 | 1123 | Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1124 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1125 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1126 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc | 1127 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
ee4a3fcd | 1128 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
661aa520 | 1129 | Opt_usrquota, Opt_grpquota, Opt_i_version, |
1449032b TT |
1130 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1131 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1132 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1133 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1134 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
df981d03 | 1135 | Opt_max_dir_size_kb, |
ac27a0ec DK |
1136 | }; |
1137 | ||
a447c093 | 1138 | static const match_table_t tokens = { |
ac27a0ec DK |
1139 | {Opt_bsd_df, "bsddf"}, |
1140 | {Opt_minix_df, "minixdf"}, | |
1141 | {Opt_grpid, "grpid"}, | |
1142 | {Opt_grpid, "bsdgroups"}, | |
1143 | {Opt_nogrpid, "nogrpid"}, | |
1144 | {Opt_nogrpid, "sysvgroups"}, | |
1145 | {Opt_resgid, "resgid=%u"}, | |
1146 | {Opt_resuid, "resuid=%u"}, | |
1147 | {Opt_sb, "sb=%u"}, | |
1148 | {Opt_err_cont, "errors=continue"}, | |
1149 | {Opt_err_panic, "errors=panic"}, | |
1150 | {Opt_err_ro, "errors=remount-ro"}, | |
1151 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec | 1152 | {Opt_debug, "debug"}, |
72578c33 TT |
1153 | {Opt_removed, "oldalloc"}, |
1154 | {Opt_removed, "orlov"}, | |
ac27a0ec DK |
1155 | {Opt_user_xattr, "user_xattr"}, |
1156 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1157 | {Opt_acl, "acl"}, | |
1158 | {Opt_noacl, "noacl"}, | |
e3bb52ae | 1159 | {Opt_noload, "norecovery"}, |
5a916be1 | 1160 | {Opt_noload, "noload"}, |
72578c33 TT |
1161 | {Opt_removed, "nobh"}, |
1162 | {Opt_removed, "bh"}, | |
ac27a0ec | 1163 | {Opt_commit, "commit=%u"}, |
30773840 TT |
1164 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1165 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1166 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1167 | {Opt_journal_checksum, "journal_checksum"}, |
1168 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1169 | {Opt_abort, "abort"}, |
1170 | {Opt_data_journal, "data=journal"}, | |
1171 | {Opt_data_ordered, "data=ordered"}, | |
1172 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1173 | {Opt_data_err_abort, "data_err=abort"}, |
1174 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1175 | {Opt_offusrjquota, "usrjquota="}, |
1176 | {Opt_usrjquota, "usrjquota=%s"}, | |
1177 | {Opt_offgrpjquota, "grpjquota="}, | |
1178 | {Opt_grpjquota, "grpjquota=%s"}, | |
1179 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1180 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1181 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1182 | {Opt_grpquota, "grpquota"}, |
1183 | {Opt_noquota, "noquota"}, | |
1184 | {Opt_quota, "quota"}, | |
1185 | {Opt_usrquota, "usrquota"}, | |
1186 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1187 | {Opt_barrier, "barrier"}, |
1188 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1189 | {Opt_i_version, "i_version"}, |
c9de560d | 1190 | {Opt_stripe, "stripe=%u"}, |
64769240 | 1191 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1192 | {Opt_nodelalloc, "nodelalloc"}, |
36ade451 JK |
1193 | {Opt_removed, "mblk_io_submit"}, |
1194 | {Opt_removed, "nomblk_io_submit"}, | |
6fd058f7 TT |
1195 | {Opt_block_validity, "block_validity"}, |
1196 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1197 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1198 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1199 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1200 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1201 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1202 | {Opt_dioread_nolock, "dioread_nolock"}, |
1203 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1204 | {Opt_discard, "discard"}, |
1205 | {Opt_nodiscard, "nodiscard"}, | |
fc6cb1cd TT |
1206 | {Opt_init_itable, "init_itable=%u"}, |
1207 | {Opt_init_itable, "init_itable"}, | |
1208 | {Opt_noinit_itable, "noinit_itable"}, | |
df981d03 | 1209 | {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, |
c7198b9c TT |
1210 | {Opt_removed, "check=none"}, /* mount option from ext2/3 */ |
1211 | {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ | |
1212 | {Opt_removed, "reservation"}, /* mount option from ext2/3 */ | |
1213 | {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ | |
1214 | {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ | |
f3f12faa | 1215 | {Opt_err, NULL}, |
ac27a0ec DK |
1216 | }; |
1217 | ||
617ba13b | 1218 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1219 | { |
617ba13b | 1220 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1221 | char *options = (char *) *data; |
1222 | ||
1223 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1224 | return 1; /* Default location */ | |
0b8e58a1 | 1225 | |
ac27a0ec | 1226 | options += 3; |
0b8e58a1 | 1227 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1228 | sb_block = simple_strtoul(options, &options, 0); |
1229 | if (*options && *options != ',') { | |
4776004f | 1230 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1231 | (char *) *data); |
1232 | return 1; | |
1233 | } | |
1234 | if (*options == ',') | |
1235 | options++; | |
1236 | *data = (void *) options; | |
0b8e58a1 | 1237 | |
ac27a0ec DK |
1238 | return sb_block; |
1239 | } | |
1240 | ||
b3881f74 | 1241 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1242 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1243 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1244 | |
56c50f11 DM |
1245 | #ifdef CONFIG_QUOTA |
1246 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1247 | { | |
1248 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1249 | char *qname; | |
03dafb5f | 1250 | int ret = -1; |
56c50f11 DM |
1251 | |
1252 | if (sb_any_quota_loaded(sb) && | |
1253 | !sbi->s_qf_names[qtype]) { | |
1254 | ext4_msg(sb, KERN_ERR, | |
1255 | "Cannot change journaled " | |
1256 | "quota options when quota turned on"); | |
57f73c2c | 1257 | return -1; |
56c50f11 | 1258 | } |
262b4662 JK |
1259 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { |
1260 | ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " | |
1261 | "when QUOTA feature is enabled"); | |
1262 | return -1; | |
1263 | } | |
56c50f11 DM |
1264 | qname = match_strdup(args); |
1265 | if (!qname) { | |
1266 | ext4_msg(sb, KERN_ERR, | |
1267 | "Not enough memory for storing quotafile name"); | |
57f73c2c | 1268 | return -1; |
56c50f11 | 1269 | } |
03dafb5f CG |
1270 | if (sbi->s_qf_names[qtype]) { |
1271 | if (strcmp(sbi->s_qf_names[qtype], qname) == 0) | |
1272 | ret = 1; | |
1273 | else | |
1274 | ext4_msg(sb, KERN_ERR, | |
1275 | "%s quota file already specified", | |
1276 | QTYPE2NAME(qtype)); | |
1277 | goto errout; | |
56c50f11 | 1278 | } |
03dafb5f | 1279 | if (strchr(qname, '/')) { |
56c50f11 DM |
1280 | ext4_msg(sb, KERN_ERR, |
1281 | "quotafile must be on filesystem root"); | |
03dafb5f | 1282 | goto errout; |
56c50f11 | 1283 | } |
03dafb5f | 1284 | sbi->s_qf_names[qtype] = qname; |
fd8c37ec | 1285 | set_opt(sb, QUOTA); |
56c50f11 | 1286 | return 1; |
03dafb5f CG |
1287 | errout: |
1288 | kfree(qname); | |
1289 | return ret; | |
56c50f11 DM |
1290 | } |
1291 | ||
1292 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1293 | { | |
1294 | ||
1295 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1296 | ||
1297 | if (sb_any_quota_loaded(sb) && | |
1298 | sbi->s_qf_names[qtype]) { | |
1299 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1300 | " when quota turned on"); | |
57f73c2c | 1301 | return -1; |
56c50f11 | 1302 | } |
03dafb5f | 1303 | kfree(sbi->s_qf_names[qtype]); |
56c50f11 DM |
1304 | sbi->s_qf_names[qtype] = NULL; |
1305 | return 1; | |
1306 | } | |
1307 | #endif | |
1308 | ||
26092bf5 TT |
1309 | #define MOPT_SET 0x0001 |
1310 | #define MOPT_CLEAR 0x0002 | |
1311 | #define MOPT_NOSUPPORT 0x0004 | |
1312 | #define MOPT_EXPLICIT 0x0008 | |
1313 | #define MOPT_CLEAR_ERR 0x0010 | |
1314 | #define MOPT_GTE0 0x0020 | |
ac27a0ec | 1315 | #ifdef CONFIG_QUOTA |
26092bf5 TT |
1316 | #define MOPT_Q 0 |
1317 | #define MOPT_QFMT 0x0040 | |
1318 | #else | |
1319 | #define MOPT_Q MOPT_NOSUPPORT | |
1320 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1321 | #endif |
26092bf5 | 1322 | #define MOPT_DATAJ 0x0080 |
8dc0aa8c TT |
1323 | #define MOPT_NO_EXT2 0x0100 |
1324 | #define MOPT_NO_EXT3 0x0200 | |
1325 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) | |
26092bf5 TT |
1326 | |
1327 | static const struct mount_opts { | |
1328 | int token; | |
1329 | int mount_opt; | |
1330 | int flags; | |
1331 | } ext4_mount_opts[] = { | |
1332 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1333 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1334 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1335 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1336 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1337 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1338 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1339 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1340 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1341 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1342 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1343 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1344 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1345 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1346 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
1347 | MOPT_EXT4_ONLY | MOPT_CLEAR | MOPT_EXPLICIT}, | |
1348 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, | |
1349 | MOPT_EXT4_ONLY | MOPT_SET}, | |
26092bf5 | 1350 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c TT |
1351 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1352 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1353 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, | |
26092bf5 TT |
1354 | {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, |
1355 | {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, | |
1356 | {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, | |
8dc0aa8c TT |
1357 | {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, |
1358 | MOPT_NO_EXT2 | MOPT_SET}, | |
1359 | {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, | |
1360 | MOPT_NO_EXT2 | MOPT_CLEAR}, | |
26092bf5 TT |
1361 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1362 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1363 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1364 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1365 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
1366 | {Opt_commit, 0, MOPT_GTE0}, | |
1367 | {Opt_max_batch_time, 0, MOPT_GTE0}, | |
1368 | {Opt_min_batch_time, 0, MOPT_GTE0}, | |
1369 | {Opt_inode_readahead_blks, 0, MOPT_GTE0}, | |
1370 | {Opt_init_itable, 0, MOPT_GTE0}, | |
1371 | {Opt_stripe, 0, MOPT_GTE0}, | |
0efb3b23 JK |
1372 | {Opt_resuid, 0, MOPT_GTE0}, |
1373 | {Opt_resgid, 0, MOPT_GTE0}, | |
1374 | {Opt_journal_dev, 0, MOPT_GTE0}, | |
1375 | {Opt_journal_ioprio, 0, MOPT_GTE0}, | |
8dc0aa8c TT |
1376 | {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, |
1377 | {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, | |
1378 | {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, | |
1379 | MOPT_NO_EXT2 | MOPT_DATAJ}, | |
26092bf5 TT |
1380 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
1381 | {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, | |
03010a33 | 1382 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 TT |
1383 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
1384 | {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, | |
ac27a0ec | 1385 | #else |
26092bf5 TT |
1386 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
1387 | {Opt_noacl, 0, MOPT_NOSUPPORT}, | |
ac27a0ec | 1388 | #endif |
26092bf5 TT |
1389 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1390 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1391 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1392 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1393 | MOPT_SET | MOPT_Q}, | |
1394 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1395 | MOPT_SET | MOPT_Q}, | |
1396 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | | |
1397 | EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, | |
1398 | {Opt_usrjquota, 0, MOPT_Q}, | |
1399 | {Opt_grpjquota, 0, MOPT_Q}, | |
1400 | {Opt_offusrjquota, 0, MOPT_Q}, | |
1401 | {Opt_offgrpjquota, 0, MOPT_Q}, | |
1402 | {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, | |
1403 | {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, | |
1404 | {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, | |
df981d03 | 1405 | {Opt_max_dir_size_kb, 0, MOPT_GTE0}, |
26092bf5 TT |
1406 | {Opt_err, 0, 0} |
1407 | }; | |
1408 | ||
1409 | static int handle_mount_opt(struct super_block *sb, char *opt, int token, | |
1410 | substring_t *args, unsigned long *journal_devnum, | |
1411 | unsigned int *journal_ioprio, int is_remount) | |
1412 | { | |
1413 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1414 | const struct mount_opts *m; | |
08cefc7a EB |
1415 | kuid_t uid; |
1416 | kgid_t gid; | |
26092bf5 TT |
1417 | int arg = 0; |
1418 | ||
57f73c2c TT |
1419 | #ifdef CONFIG_QUOTA |
1420 | if (token == Opt_usrjquota) | |
1421 | return set_qf_name(sb, USRQUOTA, &args[0]); | |
1422 | else if (token == Opt_grpjquota) | |
1423 | return set_qf_name(sb, GRPQUOTA, &args[0]); | |
1424 | else if (token == Opt_offusrjquota) | |
1425 | return clear_qf_name(sb, USRQUOTA); | |
1426 | else if (token == Opt_offgrpjquota) | |
1427 | return clear_qf_name(sb, GRPQUOTA); | |
1428 | #endif | |
26092bf5 | 1429 | switch (token) { |
f7048605 TT |
1430 | case Opt_noacl: |
1431 | case Opt_nouser_xattr: | |
1432 | ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); | |
1433 | break; | |
26092bf5 TT |
1434 | case Opt_sb: |
1435 | return 1; /* handled by get_sb_block() */ | |
1436 | case Opt_removed: | |
5f3633e3 | 1437 | ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); |
26092bf5 | 1438 | return 1; |
26092bf5 TT |
1439 | case Opt_abort: |
1440 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
1441 | return 1; | |
1442 | case Opt_i_version: | |
1443 | sb->s_flags |= MS_I_VERSION; | |
1444 | return 1; | |
26092bf5 TT |
1445 | } |
1446 | ||
5f3633e3 JK |
1447 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
1448 | if (token == m->token) | |
1449 | break; | |
1450 | ||
1451 | if (m->token == Opt_err) { | |
1452 | ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " | |
1453 | "or missing value", opt); | |
1454 | return -1; | |
1455 | } | |
1456 | ||
8dc0aa8c TT |
1457 | if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { |
1458 | ext4_msg(sb, KERN_ERR, | |
1459 | "Mount option \"%s\" incompatible with ext2", opt); | |
1460 | return -1; | |
1461 | } | |
1462 | if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
1463 | ext4_msg(sb, KERN_ERR, | |
1464 | "Mount option \"%s\" incompatible with ext3", opt); | |
1465 | return -1; | |
1466 | } | |
1467 | ||
5f3633e3 JK |
1468 | if (args->from && match_int(args, &arg)) |
1469 | return -1; | |
1470 | if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) | |
1471 | return -1; | |
1472 | if (m->flags & MOPT_EXPLICIT) | |
1473 | set_opt2(sb, EXPLICIT_DELALLOC); | |
1474 | if (m->flags & MOPT_CLEAR_ERR) | |
1475 | clear_opt(sb, ERRORS_MASK); | |
1476 | if (token == Opt_noquota && sb_any_quota_loaded(sb)) { | |
1477 | ext4_msg(sb, KERN_ERR, "Cannot change quota " | |
1478 | "options when quota turned on"); | |
1479 | return -1; | |
1480 | } | |
1481 | ||
1482 | if (m->flags & MOPT_NOSUPPORT) { | |
1483 | ext4_msg(sb, KERN_ERR, "%s option not supported", opt); | |
1484 | } else if (token == Opt_commit) { | |
1485 | if (arg == 0) | |
1486 | arg = JBD2_DEFAULT_MAX_COMMIT_AGE; | |
1487 | sbi->s_commit_interval = HZ * arg; | |
1488 | } else if (token == Opt_max_batch_time) { | |
1489 | if (arg == 0) | |
1490 | arg = EXT4_DEF_MAX_BATCH_TIME; | |
1491 | sbi->s_max_batch_time = arg; | |
1492 | } else if (token == Opt_min_batch_time) { | |
1493 | sbi->s_min_batch_time = arg; | |
1494 | } else if (token == Opt_inode_readahead_blks) { | |
e33e60ea JK |
1495 | if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { |
1496 | ext4_msg(sb, KERN_ERR, | |
1497 | "EXT4-fs: inode_readahead_blks must be " | |
1498 | "0 or a power of 2 smaller than 2^31"); | |
26092bf5 | 1499 | return -1; |
5f3633e3 JK |
1500 | } |
1501 | sbi->s_inode_readahead_blks = arg; | |
1502 | } else if (token == Opt_init_itable) { | |
1503 | set_opt(sb, INIT_INODE_TABLE); | |
1504 | if (!args->from) | |
1505 | arg = EXT4_DEF_LI_WAIT_MULT; | |
1506 | sbi->s_li_wait_mult = arg; | |
1507 | } else if (token == Opt_max_dir_size_kb) { | |
1508 | sbi->s_max_dir_size_kb = arg; | |
1509 | } else if (token == Opt_stripe) { | |
1510 | sbi->s_stripe = arg; | |
1511 | } else if (token == Opt_resuid) { | |
1512 | uid = make_kuid(current_user_ns(), arg); | |
1513 | if (!uid_valid(uid)) { | |
1514 | ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); | |
26092bf5 TT |
1515 | return -1; |
1516 | } | |
5f3633e3 JK |
1517 | sbi->s_resuid = uid; |
1518 | } else if (token == Opt_resgid) { | |
1519 | gid = make_kgid(current_user_ns(), arg); | |
1520 | if (!gid_valid(gid)) { | |
1521 | ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); | |
1522 | return -1; | |
1523 | } | |
1524 | sbi->s_resgid = gid; | |
1525 | } else if (token == Opt_journal_dev) { | |
1526 | if (is_remount) { | |
1527 | ext4_msg(sb, KERN_ERR, | |
1528 | "Cannot specify journal on remount"); | |
1529 | return -1; | |
1530 | } | |
1531 | *journal_devnum = arg; | |
1532 | } else if (token == Opt_journal_ioprio) { | |
1533 | if (arg > 7) { | |
1534 | ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" | |
1535 | " (must be 0-7)"); | |
1536 | return -1; | |
1537 | } | |
1538 | *journal_ioprio = | |
1539 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); | |
1540 | } else if (m->flags & MOPT_DATAJ) { | |
1541 | if (is_remount) { | |
1542 | if (!sbi->s_journal) | |
1543 | ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); | |
1544 | else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { | |
0efb3b23 | 1545 | ext4_msg(sb, KERN_ERR, |
26092bf5 | 1546 | "Cannot change data mode on remount"); |
26092bf5 | 1547 | return -1; |
ac27a0ec | 1548 | } |
26092bf5 | 1549 | } else { |
5f3633e3 JK |
1550 | clear_opt(sb, DATA_FLAGS); |
1551 | sbi->s_mount_opt |= m->mount_opt; | |
ac27a0ec | 1552 | } |
5f3633e3 JK |
1553 | #ifdef CONFIG_QUOTA |
1554 | } else if (m->flags & MOPT_QFMT) { | |
1555 | if (sb_any_quota_loaded(sb) && | |
1556 | sbi->s_jquota_fmt != m->mount_opt) { | |
1557 | ext4_msg(sb, KERN_ERR, "Cannot change journaled " | |
1558 | "quota options when quota turned on"); | |
1559 | return -1; | |
1560 | } | |
262b4662 JK |
1561 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, |
1562 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
1563 | ext4_msg(sb, KERN_ERR, | |
1564 | "Cannot set journaled quota options " | |
1565 | "when QUOTA feature is enabled"); | |
1566 | return -1; | |
1567 | } | |
5f3633e3 JK |
1568 | sbi->s_jquota_fmt = m->mount_opt; |
1569 | #endif | |
1570 | } else { | |
1571 | if (!args->from) | |
1572 | arg = 1; | |
1573 | if (m->flags & MOPT_CLEAR) | |
1574 | arg = !arg; | |
1575 | else if (unlikely(!(m->flags & MOPT_SET))) { | |
1576 | ext4_msg(sb, KERN_WARNING, | |
1577 | "buggy handling of option %s", opt); | |
1578 | WARN_ON(1); | |
1579 | return -1; | |
1580 | } | |
1581 | if (arg != 0) | |
1582 | sbi->s_mount_opt |= m->mount_opt; | |
1583 | else | |
1584 | sbi->s_mount_opt &= ~m->mount_opt; | |
26092bf5 | 1585 | } |
5f3633e3 | 1586 | return 1; |
26092bf5 TT |
1587 | } |
1588 | ||
1589 | static int parse_options(char *options, struct super_block *sb, | |
1590 | unsigned long *journal_devnum, | |
1591 | unsigned int *journal_ioprio, | |
1592 | int is_remount) | |
1593 | { | |
1594 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1595 | char *p; | |
1596 | substring_t args[MAX_OPT_ARGS]; | |
1597 | int token; | |
1598 | ||
1599 | if (!options) | |
1600 | return 1; | |
1601 | ||
1602 | while ((p = strsep(&options, ",")) != NULL) { | |
1603 | if (!*p) | |
1604 | continue; | |
1605 | /* | |
1606 | * Initialize args struct so we know whether arg was | |
1607 | * found; some options take optional arguments. | |
1608 | */ | |
caecd0af | 1609 | args[0].to = args[0].from = NULL; |
26092bf5 TT |
1610 | token = match_token(p, tokens, args); |
1611 | if (handle_mount_opt(sb, p, token, args, journal_devnum, | |
1612 | journal_ioprio, is_remount) < 0) | |
1613 | return 0; | |
ac27a0ec DK |
1614 | } |
1615 | #ifdef CONFIG_QUOTA | |
262b4662 JK |
1616 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && |
1617 | (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { | |
1618 | ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " | |
1619 | "feature is enabled"); | |
1620 | return 0; | |
1621 | } | |
ac27a0ec | 1622 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { |
482a7425 | 1623 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1624 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1625 | |
482a7425 | 1626 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1627 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1628 | |
56c50f11 | 1629 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1630 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1631 | "format mixing"); | |
ac27a0ec DK |
1632 | return 0; |
1633 | } | |
1634 | ||
1635 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1636 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1637 | "not specified"); | |
ac27a0ec DK |
1638 | return 0; |
1639 | } | |
1640 | } else { | |
1641 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1642 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1643 | "specified with no journaling " |
b31e1552 | 1644 | "enabled"); |
ac27a0ec DK |
1645 | return 0; |
1646 | } | |
1647 | } | |
1648 | #endif | |
261cb20c JK |
1649 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
1650 | int blocksize = | |
1651 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
1652 | ||
1653 | if (blocksize < PAGE_CACHE_SIZE) { | |
1654 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
1655 | "dioread_nolock if block size != PAGE_SIZE"); | |
1656 | return 0; | |
1657 | } | |
1658 | } | |
ac27a0ec DK |
1659 | return 1; |
1660 | } | |
1661 | ||
2adf6da8 TT |
1662 | static inline void ext4_show_quota_options(struct seq_file *seq, |
1663 | struct super_block *sb) | |
1664 | { | |
1665 | #if defined(CONFIG_QUOTA) | |
1666 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1667 | ||
1668 | if (sbi->s_jquota_fmt) { | |
1669 | char *fmtname = ""; | |
1670 | ||
1671 | switch (sbi->s_jquota_fmt) { | |
1672 | case QFMT_VFS_OLD: | |
1673 | fmtname = "vfsold"; | |
1674 | break; | |
1675 | case QFMT_VFS_V0: | |
1676 | fmtname = "vfsv0"; | |
1677 | break; | |
1678 | case QFMT_VFS_V1: | |
1679 | fmtname = "vfsv1"; | |
1680 | break; | |
1681 | } | |
1682 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
1683 | } | |
1684 | ||
1685 | if (sbi->s_qf_names[USRQUOTA]) | |
1686 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
1687 | ||
1688 | if (sbi->s_qf_names[GRPQUOTA]) | |
1689 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
1690 | ||
1691 | if (test_opt(sb, USRQUOTA)) | |
1692 | seq_puts(seq, ",usrquota"); | |
1693 | ||
1694 | if (test_opt(sb, GRPQUOTA)) | |
1695 | seq_puts(seq, ",grpquota"); | |
1696 | #endif | |
1697 | } | |
1698 | ||
5a916be1 TT |
1699 | static const char *token2str(int token) |
1700 | { | |
50df9fd5 | 1701 | const struct match_token *t; |
5a916be1 TT |
1702 | |
1703 | for (t = tokens; t->token != Opt_err; t++) | |
1704 | if (t->token == token && !strchr(t->pattern, '=')) | |
1705 | break; | |
1706 | return t->pattern; | |
1707 | } | |
1708 | ||
2adf6da8 TT |
1709 | /* |
1710 | * Show an option if | |
1711 | * - it's set to a non-default value OR | |
1712 | * - if the per-sb default is different from the global default | |
1713 | */ | |
66acdcf4 TT |
1714 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
1715 | int nodefs) | |
2adf6da8 | 1716 | { |
2adf6da8 TT |
1717 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1718 | struct ext4_super_block *es = sbi->s_es; | |
66acdcf4 | 1719 | int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; |
5a916be1 | 1720 | const struct mount_opts *m; |
66acdcf4 | 1721 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 1722 | |
66acdcf4 TT |
1723 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
1724 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
1725 | |
1726 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
1727 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
1728 | ||
1729 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
1730 | int want_set = m->flags & MOPT_SET; | |
1731 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || | |
1732 | (m->flags & MOPT_CLEAR_ERR)) | |
1733 | continue; | |
66acdcf4 | 1734 | if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) |
5a916be1 TT |
1735 | continue; /* skip if same as the default */ |
1736 | if ((want_set && | |
1737 | (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || | |
1738 | (!want_set && (sbi->s_mount_opt & m->mount_opt))) | |
1739 | continue; /* select Opt_noFoo vs Opt_Foo */ | |
1740 | SEQ_OPTS_PRINT("%s", token2str(m->token)); | |
2adf6da8 | 1741 | } |
5a916be1 | 1742 | |
08cefc7a | 1743 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 1744 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
1745 | SEQ_OPTS_PRINT("resuid=%u", |
1746 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
1747 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 1748 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
1749 | SEQ_OPTS_PRINT("resgid=%u", |
1750 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 1751 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
1752 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
1753 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 1754 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 1755 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 1756 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 1757 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 1758 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 1759 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 1760 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 1761 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 1762 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 1763 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
2adf6da8 | 1764 | if (sb->s_flags & MS_I_VERSION) |
5a916be1 | 1765 | SEQ_OPTS_PUTS("i_version"); |
66acdcf4 | 1766 | if (nodefs || sbi->s_stripe) |
5a916be1 | 1767 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
66acdcf4 | 1768 | if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { |
5a916be1 TT |
1769 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
1770 | SEQ_OPTS_PUTS("data=journal"); | |
1771 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
1772 | SEQ_OPTS_PUTS("data=ordered"); | |
1773 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
1774 | SEQ_OPTS_PUTS("data=writeback"); | |
1775 | } | |
66acdcf4 TT |
1776 | if (nodefs || |
1777 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
1778 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
1779 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 1780 | |
66acdcf4 TT |
1781 | if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && |
1782 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) | |
5a916be1 | 1783 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
1784 | if (nodefs || sbi->s_max_dir_size_kb) |
1785 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
2adf6da8 TT |
1786 | |
1787 | ext4_show_quota_options(seq, sb); | |
2adf6da8 TT |
1788 | return 0; |
1789 | } | |
1790 | ||
66acdcf4 TT |
1791 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
1792 | { | |
1793 | return _ext4_show_options(seq, root->d_sb, 0); | |
1794 | } | |
1795 | ||
1796 | static int options_seq_show(struct seq_file *seq, void *offset) | |
1797 | { | |
1798 | struct super_block *sb = seq->private; | |
1799 | int rc; | |
1800 | ||
1801 | seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); | |
1802 | rc = _ext4_show_options(seq, sb, 1); | |
1803 | seq_puts(seq, "\n"); | |
1804 | return rc; | |
1805 | } | |
1806 | ||
1807 | static int options_open_fs(struct inode *inode, struct file *file) | |
1808 | { | |
1809 | return single_open(file, options_seq_show, PDE(inode)->data); | |
1810 | } | |
1811 | ||
1812 | static const struct file_operations ext4_seq_options_fops = { | |
1813 | .owner = THIS_MODULE, | |
1814 | .open = options_open_fs, | |
1815 | .read = seq_read, | |
1816 | .llseek = seq_lseek, | |
1817 | .release = single_release, | |
1818 | }; | |
1819 | ||
617ba13b | 1820 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1821 | int read_only) |
1822 | { | |
617ba13b | 1823 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1824 | int res = 0; |
1825 | ||
617ba13b | 1826 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1827 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1828 | "forcing read-only mode"); | |
ac27a0ec DK |
1829 | res = MS_RDONLY; |
1830 | } | |
1831 | if (read_only) | |
281b5995 | 1832 | goto done; |
617ba13b | 1833 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1834 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1835 | "running e2fsck is recommended"); | |
617ba13b | 1836 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1837 | ext4_msg(sb, KERN_WARNING, |
1838 | "warning: mounting fs with errors, " | |
1839 | "running e2fsck is recommended"); | |
ed3ce80a | 1840 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
1841 | le16_to_cpu(es->s_mnt_count) >= |
1842 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1843 | ext4_msg(sb, KERN_WARNING, |
1844 | "warning: maximal mount count reached, " | |
1845 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1846 | else if (le32_to_cpu(es->s_checkinterval) && |
1847 | (le32_to_cpu(es->s_lastcheck) + | |
1848 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1849 | ext4_msg(sb, KERN_WARNING, |
1850 | "warning: checktime reached, " | |
1851 | "running e2fsck is recommended"); | |
0b8e58a1 | 1852 | if (!sbi->s_journal) |
0390131b | 1853 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1854 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1855 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1856 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1857 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1858 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1859 | if (sbi->s_journal) |
1860 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1861 | |
e2d67052 | 1862 | ext4_commit_super(sb, 1); |
281b5995 | 1863 | done: |
ac27a0ec | 1864 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1865 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1866 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1867 | sb->s_blocksize, |
1868 | sbi->s_groups_count, | |
617ba13b MC |
1869 | EXT4_BLOCKS_PER_GROUP(sb), |
1870 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1871 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1872 | |
7abc52c2 | 1873 | cleancache_init_fs(sb); |
ac27a0ec DK |
1874 | return res; |
1875 | } | |
1876 | ||
117fff10 TT |
1877 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
1878 | { | |
1879 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1880 | struct flex_groups *new_groups; | |
1881 | int size; | |
1882 | ||
1883 | if (!sbi->s_log_groups_per_flex) | |
1884 | return 0; | |
1885 | ||
1886 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
1887 | if (size <= sbi->s_flex_groups_allocated) | |
1888 | return 0; | |
1889 | ||
1890 | size = roundup_pow_of_two(size * sizeof(struct flex_groups)); | |
1891 | new_groups = ext4_kvzalloc(size, GFP_KERNEL); | |
1892 | if (!new_groups) { | |
1893 | ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", | |
1894 | size / (int) sizeof(struct flex_groups)); | |
1895 | return -ENOMEM; | |
1896 | } | |
1897 | ||
1898 | if (sbi->s_flex_groups) { | |
1899 | memcpy(new_groups, sbi->s_flex_groups, | |
1900 | (sbi->s_flex_groups_allocated * | |
1901 | sizeof(struct flex_groups))); | |
1902 | ext4_kvfree(sbi->s_flex_groups); | |
1903 | } | |
1904 | sbi->s_flex_groups = new_groups; | |
1905 | sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); | |
1906 | return 0; | |
1907 | } | |
1908 | ||
772cb7c8 JS |
1909 | static int ext4_fill_flex_info(struct super_block *sb) |
1910 | { | |
1911 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1912 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 | 1913 | ext4_group_t flex_group; |
d50f2ab6 | 1914 | unsigned int groups_per_flex = 0; |
117fff10 | 1915 | int i, err; |
772cb7c8 | 1916 | |
503358ae | 1917 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 1918 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
1919 | sbi->s_log_groups_per_flex = 0; |
1920 | return 1; | |
1921 | } | |
76495ec1 | 1922 | groups_per_flex = 1U << sbi->s_log_groups_per_flex; |
772cb7c8 | 1923 | |
117fff10 TT |
1924 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
1925 | if (err) | |
9933fc0a | 1926 | goto failed; |
772cb7c8 | 1927 | |
772cb7c8 | 1928 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1929 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1930 | |
1931 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1932 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1933 | &sbi->s_flex_groups[flex_group].free_inodes); | |
90ba983f TT |
1934 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
1935 | &sbi->s_flex_groups[flex_group].free_clusters); | |
7ad9bb65 TT |
1936 | atomic_add(ext4_used_dirs_count(sb, gdp), |
1937 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1938 | } |
1939 | ||
1940 | return 1; | |
1941 | failed: | |
1942 | return 0; | |
1943 | } | |
1944 | ||
feb0ab32 DW |
1945 | static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1946 | struct ext4_group_desc *gdp) | |
717d50e4 | 1947 | { |
feb0ab32 | 1948 | int offset; |
717d50e4 | 1949 | __u16 crc = 0; |
feb0ab32 | 1950 | __le32 le_group = cpu_to_le32(block_group); |
717d50e4 | 1951 | |
feb0ab32 DW |
1952 | if ((sbi->s_es->s_feature_ro_compat & |
1953 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { | |
1954 | /* Use new metadata_csum algorithm */ | |
d6a77105 | 1955 | __le16 save_csum; |
feb0ab32 DW |
1956 | __u32 csum32; |
1957 | ||
d6a77105 | 1958 | save_csum = gdp->bg_checksum; |
feb0ab32 DW |
1959 | gdp->bg_checksum = 0; |
1960 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, | |
1961 | sizeof(le_group)); | |
1962 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, | |
1963 | sbi->s_desc_size); | |
d6a77105 | 1964 | gdp->bg_checksum = save_csum; |
feb0ab32 DW |
1965 | |
1966 | crc = csum32 & 0xFFFF; | |
1967 | goto out; | |
717d50e4 AD |
1968 | } |
1969 | ||
feb0ab32 DW |
1970 | /* old crc16 code */ |
1971 | offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1972 | ||
1973 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1974 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1975 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1976 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1977 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1978 | if ((sbi->s_es->s_feature_incompat & | |
1979 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1980 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1981 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1982 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1983 | offset); | |
1984 | ||
1985 | out: | |
717d50e4 AD |
1986 | return cpu_to_le16(crc); |
1987 | } | |
1988 | ||
feb0ab32 | 1989 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
1990 | struct ext4_group_desc *gdp) |
1991 | { | |
feb0ab32 DW |
1992 | if (ext4_has_group_desc_csum(sb) && |
1993 | (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), | |
1994 | block_group, gdp))) | |
717d50e4 AD |
1995 | return 0; |
1996 | ||
1997 | return 1; | |
1998 | } | |
1999 | ||
feb0ab32 DW |
2000 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
2001 | struct ext4_group_desc *gdp) | |
2002 | { | |
2003 | if (!ext4_has_group_desc_csum(sb)) | |
2004 | return; | |
2005 | gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); | |
2006 | } | |
2007 | ||
ac27a0ec | 2008 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2009 | static int ext4_check_descriptors(struct super_block *sb, |
2010 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2011 | { |
617ba13b MC |
2012 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2013 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2014 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2015 | ext4_fsblk_t block_bitmap; |
2016 | ext4_fsblk_t inode_bitmap; | |
2017 | ext4_fsblk_t inode_table; | |
ce421581 | 2018 | int flexbg_flag = 0; |
bfff6873 | 2019 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2020 | |
ce421581 JS |
2021 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2022 | flexbg_flag = 1; | |
2023 | ||
af5bc92d | 2024 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2025 | |
197cd65a AM |
2026 | for (i = 0; i < sbi->s_groups_count; i++) { |
2027 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2028 | ||
ce421581 | 2029 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2030 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2031 | else |
2032 | last_block = first_block + | |
617ba13b | 2033 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2034 | |
bfff6873 LC |
2035 | if ((grp == sbi->s_groups_count) && |
2036 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2037 | grp = i; | |
2038 | ||
8fadc143 | 2039 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2040 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2041 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2042 | "Block bitmap for group %u not in group " |
b31e1552 | 2043 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2044 | return 0; |
2045 | } | |
8fadc143 | 2046 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2047 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2048 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2049 | "Inode bitmap for group %u not in group " |
b31e1552 | 2050 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2051 | return 0; |
2052 | } | |
8fadc143 | 2053 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2054 | if (inode_table < first_block || |
2b2d6d01 | 2055 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2056 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2057 | "Inode table for group %u not in group " |
b31e1552 | 2058 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2059 | return 0; |
2060 | } | |
955ce5f5 | 2061 | ext4_lock_group(sb, i); |
feb0ab32 | 2062 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
2063 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2064 | "Checksum for group %u failed (%u!=%u)", | |
2065 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2066 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2067 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2068 | ext4_unlock_group(sb, i); |
8a266467 | 2069 | return 0; |
7ee1ec4c | 2070 | } |
717d50e4 | 2071 | } |
955ce5f5 | 2072 | ext4_unlock_group(sb, i); |
ce421581 JS |
2073 | if (!flexbg_flag) |
2074 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2075 | } |
bfff6873 LC |
2076 | if (NULL != first_not_zeroed) |
2077 | *first_not_zeroed = grp; | |
ac27a0ec | 2078 | |
5dee5437 TT |
2079 | ext4_free_blocks_count_set(sbi->s_es, |
2080 | EXT4_C2B(sbi, ext4_count_free_clusters(sb))); | |
0b8e58a1 | 2081 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2082 | return 1; |
2083 | } | |
2084 | ||
617ba13b | 2085 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2086 | * the superblock) which were deleted from all directories, but held open by |
2087 | * a process at the time of a crash. We walk the list and try to delete these | |
2088 | * inodes at recovery time (only with a read-write filesystem). | |
2089 | * | |
2090 | * In order to keep the orphan inode chain consistent during traversal (in | |
2091 | * case of crash during recovery), we link each inode into the superblock | |
2092 | * orphan list_head and handle it the same way as an inode deletion during | |
2093 | * normal operation (which journals the operations for us). | |
2094 | * | |
2095 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2096 | * accidentally point at an in-use or already deleted inode. The worst that | |
2097 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2098 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2099 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2100 | * inode cleanup for us, so we can safely abort without any further action. | |
2101 | */ | |
2b2d6d01 TT |
2102 | static void ext4_orphan_cleanup(struct super_block *sb, |
2103 | struct ext4_super_block *es) | |
ac27a0ec DK |
2104 | { |
2105 | unsigned int s_flags = sb->s_flags; | |
2106 | int nr_orphans = 0, nr_truncates = 0; | |
2107 | #ifdef CONFIG_QUOTA | |
2108 | int i; | |
2109 | #endif | |
2110 | if (!es->s_last_orphan) { | |
2111 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2112 | return; | |
2113 | } | |
2114 | ||
a8f48a95 | 2115 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2116 | ext4_msg(sb, KERN_ERR, "write access " |
2117 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2118 | return; |
2119 | } | |
2120 | ||
d39195c3 AG |
2121 | /* Check if feature set would not allow a r/w mount */ |
2122 | if (!ext4_feature_set_ok(sb, 0)) { | |
2123 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2124 | "unknown ROCOMPAT features"); | |
2125 | return; | |
2126 | } | |
2127 | ||
617ba13b | 2128 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
c25f9bc6 ES |
2129 | /* don't clear list on RO mount w/ errors */ |
2130 | if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { | |
ac27a0ec DK |
2131 | jbd_debug(1, "Errors on filesystem, " |
2132 | "clearing orphan list.\n"); | |
c25f9bc6 ES |
2133 | es->s_last_orphan = 0; |
2134 | } | |
ac27a0ec DK |
2135 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); |
2136 | return; | |
2137 | } | |
2138 | ||
2139 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2140 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2141 | sb->s_flags &= ~MS_RDONLY; |
2142 | } | |
2143 | #ifdef CONFIG_QUOTA | |
2144 | /* Needed for iput() to work correctly and not trash data */ | |
2145 | sb->s_flags |= MS_ACTIVE; | |
2146 | /* Turn on quotas so that they are updated correctly */ | |
2147 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2148 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2149 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2150 | if (ret < 0) |
b31e1552 ES |
2151 | ext4_msg(sb, KERN_ERR, |
2152 | "Cannot turn on journaled " | |
2153 | "quota: error %d", ret); | |
ac27a0ec DK |
2154 | } |
2155 | } | |
2156 | #endif | |
2157 | ||
2158 | while (es->s_last_orphan) { | |
2159 | struct inode *inode; | |
2160 | ||
97bd42b9 JB |
2161 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2162 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2163 | es->s_last_orphan = 0; |
2164 | break; | |
2165 | } | |
2166 | ||
617ba13b | 2167 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2168 | dquot_initialize(inode); |
ac27a0ec | 2169 | if (inode->i_nlink) { |
b31e1552 ES |
2170 | ext4_msg(sb, KERN_DEBUG, |
2171 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2172 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2173 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2174 | inode->i_ino, inode->i_size); |
721e3eba | 2175 | mutex_lock(&inode->i_mutex); |
617ba13b | 2176 | ext4_truncate(inode); |
721e3eba | 2177 | mutex_unlock(&inode->i_mutex); |
ac27a0ec DK |
2178 | nr_truncates++; |
2179 | } else { | |
b31e1552 ES |
2180 | ext4_msg(sb, KERN_DEBUG, |
2181 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2182 | __func__, inode->i_ino); |
ac27a0ec DK |
2183 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2184 | inode->i_ino); | |
2185 | nr_orphans++; | |
2186 | } | |
2187 | iput(inode); /* The delete magic happens here! */ | |
2188 | } | |
2189 | ||
2b2d6d01 | 2190 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2191 | |
2192 | if (nr_orphans) | |
b31e1552 ES |
2193 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2194 | PLURAL(nr_orphans)); | |
ac27a0ec | 2195 | if (nr_truncates) |
b31e1552 ES |
2196 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2197 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2198 | #ifdef CONFIG_QUOTA |
2199 | /* Turn quotas off */ | |
2200 | for (i = 0; i < MAXQUOTAS; i++) { | |
2201 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2202 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2203 | } |
2204 | #endif | |
2205 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2206 | } | |
0b8e58a1 | 2207 | |
cd2291a4 ES |
2208 | /* |
2209 | * Maximal extent format file size. | |
2210 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2211 | * extent format containers, within a sector_t, and within i_blocks | |
2212 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2213 | * so that won't be a limiting factor. | |
2214 | * | |
f17722f9 LC |
2215 | * However there is other limiting factor. We do store extents in the form |
2216 | * of starting block and length, hence the resulting length of the extent | |
2217 | * covering maximum file size must fit into on-disk format containers as | |
2218 | * well. Given that length is always by 1 unit bigger than max unit (because | |
2219 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
2220 | * | |
cd2291a4 ES |
2221 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
2222 | */ | |
f287a1a5 | 2223 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2224 | { |
2225 | loff_t res; | |
2226 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2227 | ||
2228 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2229 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2230 | /* |
90c699a9 | 2231 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2232 | * i_block represent total blocks in 512 bytes |
2233 | * 32 == size of vfs inode i_blocks * 8 | |
2234 | */ | |
2235 | upper_limit = (1LL << 32) - 1; | |
2236 | ||
2237 | /* total blocks in file system block size */ | |
2238 | upper_limit >>= (blkbits - 9); | |
2239 | upper_limit <<= blkbits; | |
2240 | } | |
2241 | ||
f17722f9 LC |
2242 | /* |
2243 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
2244 | * by one fs block, so ee_len can cover the extent of maximum file | |
2245 | * size | |
2246 | */ | |
2247 | res = (1LL << 32) - 1; | |
cd2291a4 | 2248 | res <<= blkbits; |
cd2291a4 ES |
2249 | |
2250 | /* Sanity check against vm- & vfs- imposed limits */ | |
2251 | if (res > upper_limit) | |
2252 | res = upper_limit; | |
2253 | ||
2254 | return res; | |
2255 | } | |
ac27a0ec | 2256 | |
ac27a0ec | 2257 | /* |
cd2291a4 | 2258 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2259 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2260 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2261 | */ |
f287a1a5 | 2262 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2263 | { |
617ba13b | 2264 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2265 | int meta_blocks; |
2266 | loff_t upper_limit; | |
0b8e58a1 AD |
2267 | /* This is calculated to be the largest file size for a dense, block |
2268 | * mapped file such that the file's total number of 512-byte sectors, | |
2269 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2270 | * | |
2271 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2272 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2273 | */ |
2274 | ||
f287a1a5 | 2275 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2276 | /* |
90c699a9 | 2277 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2278 | * the inode i_block field represents total file blocks in |
2279 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2280 | */ |
2281 | upper_limit = (1LL << 32) - 1; | |
2282 | ||
2283 | /* total blocks in file system block size */ | |
2284 | upper_limit >>= (bits - 9); | |
2285 | ||
2286 | } else { | |
8180a562 AK |
2287 | /* |
2288 | * We use 48 bit ext4_inode i_blocks | |
2289 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2290 | * represent total number of blocks in | |
2291 | * file system block size | |
2292 | */ | |
0fc1b451 AK |
2293 | upper_limit = (1LL << 48) - 1; |
2294 | ||
0fc1b451 AK |
2295 | } |
2296 | ||
2297 | /* indirect blocks */ | |
2298 | meta_blocks = 1; | |
2299 | /* double indirect blocks */ | |
2300 | meta_blocks += 1 + (1LL << (bits-2)); | |
2301 | /* tripple indirect blocks */ | |
2302 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2303 | ||
2304 | upper_limit -= meta_blocks; | |
2305 | upper_limit <<= bits; | |
ac27a0ec DK |
2306 | |
2307 | res += 1LL << (bits-2); | |
2308 | res += 1LL << (2*(bits-2)); | |
2309 | res += 1LL << (3*(bits-2)); | |
2310 | res <<= bits; | |
2311 | if (res > upper_limit) | |
2312 | res = upper_limit; | |
0fc1b451 AK |
2313 | |
2314 | if (res > MAX_LFS_FILESIZE) | |
2315 | res = MAX_LFS_FILESIZE; | |
2316 | ||
ac27a0ec DK |
2317 | return res; |
2318 | } | |
2319 | ||
617ba13b | 2320 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2321 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2322 | { |
617ba13b | 2323 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2324 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2325 | int has_super = 0; |
2326 | ||
2327 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2328 | ||
617ba13b | 2329 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2330 | nr < first_meta_bg) |
70bbb3e0 | 2331 | return logical_sb_block + nr + 1; |
ac27a0ec | 2332 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2333 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2334 | has_super = 1; |
0b8e58a1 | 2335 | |
617ba13b | 2336 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2337 | } |
2338 | ||
c9de560d AT |
2339 | /** |
2340 | * ext4_get_stripe_size: Get the stripe size. | |
2341 | * @sbi: In memory super block info | |
2342 | * | |
2343 | * If we have specified it via mount option, then | |
2344 | * use the mount option value. If the value specified at mount time is | |
2345 | * greater than the blocks per group use the super block value. | |
2346 | * If the super block value is greater than blocks per group return 0. | |
2347 | * Allocator needs it be less than blocks per group. | |
2348 | * | |
2349 | */ | |
2350 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2351 | { | |
2352 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2353 | unsigned long stripe_width = | |
2354 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 2355 | int ret; |
c9de560d AT |
2356 | |
2357 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 DE |
2358 | ret = sbi->s_stripe; |
2359 | else if (stripe_width <= sbi->s_blocks_per_group) | |
2360 | ret = stripe_width; | |
2361 | else if (stride <= sbi->s_blocks_per_group) | |
2362 | ret = stride; | |
2363 | else | |
2364 | ret = 0; | |
c9de560d | 2365 | |
3eb08658 DE |
2366 | /* |
2367 | * If the stripe width is 1, this makes no sense and | |
2368 | * we set it to 0 to turn off stripe handling code. | |
2369 | */ | |
2370 | if (ret <= 1) | |
2371 | ret = 0; | |
c9de560d | 2372 | |
3eb08658 | 2373 | return ret; |
c9de560d | 2374 | } |
ac27a0ec | 2375 | |
3197ebdb TT |
2376 | /* sysfs supprt */ |
2377 | ||
2378 | struct ext4_attr { | |
2379 | struct attribute attr; | |
2380 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2381 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2382 | const char *, size_t); |
2383 | int offset; | |
2384 | }; | |
2385 | ||
27dd4385 LC |
2386 | static int parse_strtoull(const char *buf, |
2387 | unsigned long long max, unsigned long long *value) | |
2388 | { | |
2389 | int ret; | |
2390 | ||
2391 | ret = kstrtoull(skip_spaces(buf), 0, value); | |
2392 | if (!ret && *value > max) | |
2393 | ret = -EINVAL; | |
2394 | return ret; | |
2395 | } | |
2396 | ||
3197ebdb TT |
2397 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, |
2398 | struct ext4_sb_info *sbi, | |
2399 | char *buf) | |
2400 | { | |
2401 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
7b415bf6 AK |
2402 | (s64) EXT4_C2B(sbi, |
2403 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
3197ebdb TT |
2404 | } |
2405 | ||
2406 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2407 | struct ext4_sb_info *sbi, char *buf) | |
2408 | { | |
2409 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2410 | ||
f613dfcb TT |
2411 | if (!sb->s_bdev->bd_part) |
2412 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2413 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2414 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2415 | sbi->s_sectors_written_start) >> 1); | |
2416 | } | |
2417 | ||
2418 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2419 | struct ext4_sb_info *sbi, char *buf) | |
2420 | { | |
2421 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2422 | ||
f613dfcb TT |
2423 | if (!sb->s_bdev->bd_part) |
2424 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2425 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2426 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2427 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2428 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2429 | } |
2430 | ||
2431 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2432 | struct ext4_sb_info *sbi, | |
2433 | const char *buf, size_t count) | |
2434 | { | |
2435 | unsigned long t; | |
e1091b15 | 2436 | int ret; |
3197ebdb | 2437 | |
e1091b15 LC |
2438 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2439 | if (ret) | |
2440 | return ret; | |
3197ebdb | 2441 | |
e1091b15 | 2442 | if (t && (!is_power_of_2(t) || t > 0x40000000)) |
3197ebdb TT |
2443 | return -EINVAL; |
2444 | ||
2445 | sbi->s_inode_readahead_blks = t; | |
2446 | return count; | |
2447 | } | |
2448 | ||
2449 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2450 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2451 | { |
2452 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2453 | ||
2454 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2455 | } | |
2456 | ||
2457 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2458 | struct ext4_sb_info *sbi, | |
2459 | const char *buf, size_t count) | |
2460 | { | |
2461 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2462 | unsigned long t; | |
e1091b15 | 2463 | int ret; |
3197ebdb | 2464 | |
e1091b15 LC |
2465 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
2466 | if (ret) | |
2467 | return ret; | |
3197ebdb TT |
2468 | *ui = t; |
2469 | return count; | |
2470 | } | |
2471 | ||
27dd4385 LC |
2472 | static ssize_t reserved_clusters_show(struct ext4_attr *a, |
2473 | struct ext4_sb_info *sbi, char *buf) | |
2474 | { | |
2475 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2476 | (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); | |
2477 | } | |
2478 | ||
2479 | static ssize_t reserved_clusters_store(struct ext4_attr *a, | |
2480 | struct ext4_sb_info *sbi, | |
2481 | const char *buf, size_t count) | |
2482 | { | |
2483 | unsigned long long val; | |
2484 | int ret; | |
2485 | ||
2486 | if (parse_strtoull(buf, -1ULL, &val)) | |
2487 | return -EINVAL; | |
2488 | ret = ext4_reserve_clusters(sbi, val); | |
2489 | ||
2490 | return ret ? ret : count; | |
2491 | } | |
2492 | ||
2c0544b2 TT |
2493 | static ssize_t trigger_test_error(struct ext4_attr *a, |
2494 | struct ext4_sb_info *sbi, | |
2495 | const char *buf, size_t count) | |
2496 | { | |
2497 | int len = count; | |
2498 | ||
2499 | if (!capable(CAP_SYS_ADMIN)) | |
2500 | return -EPERM; | |
2501 | ||
2502 | if (len && buf[len-1] == '\n') | |
2503 | len--; | |
2504 | ||
2505 | if (len) | |
2506 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
2507 | return count; | |
2508 | } | |
2509 | ||
3197ebdb TT |
2510 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ |
2511 | static struct ext4_attr ext4_attr_##_name = { \ | |
2512 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2513 | .show = _show, \ | |
2514 | .store = _store, \ | |
2515 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2516 | } | |
2517 | #define EXT4_ATTR(name, mode, show, store) \ | |
2518 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2519 | ||
857ac889 | 2520 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2521 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2522 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2523 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2524 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2525 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2526 | ||
2527 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2528 | EXT4_RO_ATTR(session_write_kbytes); | |
2529 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
27dd4385 | 2530 | EXT4_RW_ATTR(reserved_clusters); |
3197ebdb TT |
2531 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, |
2532 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2533 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2534 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2535 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2536 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2537 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2538 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2539 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2540 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
67a5da56 | 2541 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
2c0544b2 | 2542 | EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); |
3197ebdb TT |
2543 | |
2544 | static struct attribute *ext4_attrs[] = { | |
2545 | ATTR_LIST(delayed_allocation_blocks), | |
2546 | ATTR_LIST(session_write_kbytes), | |
2547 | ATTR_LIST(lifetime_write_kbytes), | |
27dd4385 | 2548 | ATTR_LIST(reserved_clusters), |
3197ebdb | 2549 | ATTR_LIST(inode_readahead_blks), |
11013911 | 2550 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2551 | ATTR_LIST(mb_stats), |
2552 | ATTR_LIST(mb_max_to_scan), | |
2553 | ATTR_LIST(mb_min_to_scan), | |
2554 | ATTR_LIST(mb_order2_req), | |
2555 | ATTR_LIST(mb_stream_req), | |
2556 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2557 | ATTR_LIST(max_writeback_mb_bump), |
67a5da56 | 2558 | ATTR_LIST(extent_max_zeroout_kb), |
2c0544b2 | 2559 | ATTR_LIST(trigger_fs_error), |
3197ebdb TT |
2560 | NULL, |
2561 | }; | |
2562 | ||
857ac889 LC |
2563 | /* Features this copy of ext4 supports */ |
2564 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2565 | EXT4_INFO_ATTR(batched_discard); |
5e7bbef1 | 2566 | EXT4_INFO_ATTR(meta_bg_resize); |
857ac889 LC |
2567 | |
2568 | static struct attribute *ext4_feat_attrs[] = { | |
2569 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2570 | ATTR_LIST(batched_discard), |
5e7bbef1 | 2571 | ATTR_LIST(meta_bg_resize), |
857ac889 LC |
2572 | NULL, |
2573 | }; | |
2574 | ||
3197ebdb TT |
2575 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2576 | struct attribute *attr, char *buf) | |
2577 | { | |
2578 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2579 | s_kobj); | |
2580 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2581 | ||
2582 | return a->show ? a->show(a, sbi, buf) : 0; | |
2583 | } | |
2584 | ||
2585 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2586 | struct attribute *attr, | |
2587 | const char *buf, size_t len) | |
2588 | { | |
2589 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2590 | s_kobj); | |
2591 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2592 | ||
2593 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2594 | } | |
2595 | ||
2596 | static void ext4_sb_release(struct kobject *kobj) | |
2597 | { | |
2598 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2599 | s_kobj); | |
2600 | complete(&sbi->s_kobj_unregister); | |
2601 | } | |
2602 | ||
52cf25d0 | 2603 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2604 | .show = ext4_attr_show, |
2605 | .store = ext4_attr_store, | |
2606 | }; | |
2607 | ||
2608 | static struct kobj_type ext4_ktype = { | |
2609 | .default_attrs = ext4_attrs, | |
2610 | .sysfs_ops = &ext4_attr_ops, | |
2611 | .release = ext4_sb_release, | |
2612 | }; | |
2613 | ||
857ac889 LC |
2614 | static void ext4_feat_release(struct kobject *kobj) |
2615 | { | |
2616 | complete(&ext4_feat->f_kobj_unregister); | |
2617 | } | |
2618 | ||
2619 | static struct kobj_type ext4_feat_ktype = { | |
2620 | .default_attrs = ext4_feat_attrs, | |
2621 | .sysfs_ops = &ext4_attr_ops, | |
2622 | .release = ext4_feat_release, | |
2623 | }; | |
2624 | ||
a13fb1a4 ES |
2625 | /* |
2626 | * Check whether this filesystem can be mounted based on | |
2627 | * the features present and the RDONLY/RDWR mount requested. | |
2628 | * Returns 1 if this filesystem can be mounted as requested, | |
2629 | * 0 if it cannot be. | |
2630 | */ | |
2631 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2632 | { | |
2633 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2634 | ext4_msg(sb, KERN_ERR, | |
2635 | "Couldn't mount because of " | |
2636 | "unsupported optional features (%x)", | |
2637 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2638 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2639 | return 0; | |
2640 | } | |
2641 | ||
2642 | if (readonly) | |
2643 | return 1; | |
2644 | ||
2645 | /* Check that feature set is OK for a read-write mount */ | |
2646 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2647 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2648 | "unsupported optional features (%x)", | |
2649 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2650 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2651 | return 0; | |
2652 | } | |
2653 | /* | |
2654 | * Large file size enabled file system can only be mounted | |
2655 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2656 | */ | |
2657 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2658 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2659 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2660 | "cannot be mounted RDWR without " | |
2661 | "CONFIG_LBDAF"); | |
2662 | return 0; | |
2663 | } | |
2664 | } | |
bab08ab9 TT |
2665 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && |
2666 | !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { | |
2667 | ext4_msg(sb, KERN_ERR, | |
2668 | "Can't support bigalloc feature without " | |
2669 | "extents feature\n"); | |
2670 | return 0; | |
2671 | } | |
7c319d32 AK |
2672 | |
2673 | #ifndef CONFIG_QUOTA | |
2674 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
2675 | !readonly) { | |
2676 | ext4_msg(sb, KERN_ERR, | |
2677 | "Filesystem with quota feature cannot be mounted RDWR " | |
2678 | "without CONFIG_QUOTA"); | |
2679 | return 0; | |
2680 | } | |
2681 | #endif /* CONFIG_QUOTA */ | |
a13fb1a4 ES |
2682 | return 1; |
2683 | } | |
2684 | ||
66e61a9e TT |
2685 | /* |
2686 | * This function is called once a day if we have errors logged | |
2687 | * on the file system | |
2688 | */ | |
2689 | static void print_daily_error_info(unsigned long arg) | |
2690 | { | |
2691 | struct super_block *sb = (struct super_block *) arg; | |
2692 | struct ext4_sb_info *sbi; | |
2693 | struct ext4_super_block *es; | |
2694 | ||
2695 | sbi = EXT4_SB(sb); | |
2696 | es = sbi->s_es; | |
2697 | ||
2698 | if (es->s_error_count) | |
2699 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2700 | le32_to_cpu(es->s_error_count)); | |
2701 | if (es->s_first_error_time) { | |
2702 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2703 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2704 | (int) sizeof(es->s_first_error_func), | |
2705 | es->s_first_error_func, | |
2706 | le32_to_cpu(es->s_first_error_line)); | |
2707 | if (es->s_first_error_ino) | |
2708 | printk(": inode %u", | |
2709 | le32_to_cpu(es->s_first_error_ino)); | |
2710 | if (es->s_first_error_block) | |
2711 | printk(": block %llu", (unsigned long long) | |
2712 | le64_to_cpu(es->s_first_error_block)); | |
2713 | printk("\n"); | |
2714 | } | |
2715 | if (es->s_last_error_time) { | |
2716 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2717 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2718 | (int) sizeof(es->s_last_error_func), | |
2719 | es->s_last_error_func, | |
2720 | le32_to_cpu(es->s_last_error_line)); | |
2721 | if (es->s_last_error_ino) | |
2722 | printk(": inode %u", | |
2723 | le32_to_cpu(es->s_last_error_ino)); | |
2724 | if (es->s_last_error_block) | |
2725 | printk(": block %llu", (unsigned long long) | |
2726 | le64_to_cpu(es->s_last_error_block)); | |
2727 | printk("\n"); | |
2728 | } | |
2729 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2730 | } | |
2731 | ||
bfff6873 LC |
2732 | /* Find next suitable group and run ext4_init_inode_table */ |
2733 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2734 | { | |
2735 | struct ext4_group_desc *gdp = NULL; | |
2736 | ext4_group_t group, ngroups; | |
2737 | struct super_block *sb; | |
2738 | unsigned long timeout = 0; | |
2739 | int ret = 0; | |
2740 | ||
2741 | sb = elr->lr_super; | |
2742 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2743 | ||
8e8ad8a5 | 2744 | sb_start_write(sb); |
bfff6873 LC |
2745 | for (group = elr->lr_next_group; group < ngroups; group++) { |
2746 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2747 | if (!gdp) { | |
2748 | ret = 1; | |
2749 | break; | |
2750 | } | |
2751 | ||
2752 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2753 | break; | |
2754 | } | |
2755 | ||
7f511862 | 2756 | if (group >= ngroups) |
bfff6873 LC |
2757 | ret = 1; |
2758 | ||
2759 | if (!ret) { | |
2760 | timeout = jiffies; | |
2761 | ret = ext4_init_inode_table(sb, group, | |
2762 | elr->lr_timeout ? 0 : 1); | |
2763 | if (elr->lr_timeout == 0) { | |
51ce6511 LC |
2764 | timeout = (jiffies - timeout) * |
2765 | elr->lr_sbi->s_li_wait_mult; | |
bfff6873 LC |
2766 | elr->lr_timeout = timeout; |
2767 | } | |
2768 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2769 | elr->lr_next_group = group + 1; | |
2770 | } | |
8e8ad8a5 | 2771 | sb_end_write(sb); |
bfff6873 LC |
2772 | |
2773 | return ret; | |
2774 | } | |
2775 | ||
2776 | /* | |
2777 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 2778 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
2779 | */ |
2780 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2781 | { | |
2782 | struct ext4_sb_info *sbi; | |
2783 | ||
2784 | if (!elr) | |
2785 | return; | |
2786 | ||
2787 | sbi = elr->lr_sbi; | |
2788 | ||
2789 | list_del(&elr->lr_request); | |
2790 | sbi->s_li_request = NULL; | |
2791 | kfree(elr); | |
2792 | } | |
2793 | ||
2794 | static void ext4_unregister_li_request(struct super_block *sb) | |
2795 | { | |
1bb933fb LC |
2796 | mutex_lock(&ext4_li_mtx); |
2797 | if (!ext4_li_info) { | |
2798 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 2799 | return; |
1bb933fb | 2800 | } |
bfff6873 LC |
2801 | |
2802 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 2803 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 2804 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 2805 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
2806 | } |
2807 | ||
8f1f7453 ES |
2808 | static struct task_struct *ext4_lazyinit_task; |
2809 | ||
bfff6873 LC |
2810 | /* |
2811 | * This is the function where ext4lazyinit thread lives. It walks | |
2812 | * through the request list searching for next scheduled filesystem. | |
2813 | * When such a fs is found, run the lazy initialization request | |
2814 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2815 | * function. Based on that time we compute next schedule time of | |
2816 | * the request. When walking through the list is complete, compute | |
2817 | * next waking time and put itself into sleep. | |
2818 | */ | |
2819 | static int ext4_lazyinit_thread(void *arg) | |
2820 | { | |
2821 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2822 | struct list_head *pos, *n; | |
2823 | struct ext4_li_request *elr; | |
4ed5c033 | 2824 | unsigned long next_wakeup, cur; |
bfff6873 LC |
2825 | |
2826 | BUG_ON(NULL == eli); | |
2827 | ||
bfff6873 LC |
2828 | cont_thread: |
2829 | while (true) { | |
2830 | next_wakeup = MAX_JIFFY_OFFSET; | |
2831 | ||
2832 | mutex_lock(&eli->li_list_mtx); | |
2833 | if (list_empty(&eli->li_request_list)) { | |
2834 | mutex_unlock(&eli->li_list_mtx); | |
2835 | goto exit_thread; | |
2836 | } | |
2837 | ||
2838 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2839 | elr = list_entry(pos, struct ext4_li_request, | |
2840 | lr_request); | |
2841 | ||
b2c78cd0 TT |
2842 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2843 | if (ext4_run_li_request(elr) != 0) { | |
2844 | /* error, remove the lazy_init job */ | |
2845 | ext4_remove_li_request(elr); | |
2846 | continue; | |
2847 | } | |
bfff6873 LC |
2848 | } |
2849 | ||
2850 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2851 | next_wakeup = elr->lr_next_sched; | |
2852 | } | |
2853 | mutex_unlock(&eli->li_list_mtx); | |
2854 | ||
a0acae0e | 2855 | try_to_freeze(); |
bfff6873 | 2856 | |
4ed5c033 LC |
2857 | cur = jiffies; |
2858 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 2859 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
2860 | cond_resched(); |
2861 | continue; | |
2862 | } | |
2863 | ||
4ed5c033 LC |
2864 | schedule_timeout_interruptible(next_wakeup - cur); |
2865 | ||
8f1f7453 ES |
2866 | if (kthread_should_stop()) { |
2867 | ext4_clear_request_list(); | |
2868 | goto exit_thread; | |
2869 | } | |
bfff6873 LC |
2870 | } |
2871 | ||
2872 | exit_thread: | |
2873 | /* | |
2874 | * It looks like the request list is empty, but we need | |
2875 | * to check it under the li_list_mtx lock, to prevent any | |
2876 | * additions into it, and of course we should lock ext4_li_mtx | |
2877 | * to atomically free the list and ext4_li_info, because at | |
2878 | * this point another ext4 filesystem could be registering | |
2879 | * new one. | |
2880 | */ | |
2881 | mutex_lock(&ext4_li_mtx); | |
2882 | mutex_lock(&eli->li_list_mtx); | |
2883 | if (!list_empty(&eli->li_request_list)) { | |
2884 | mutex_unlock(&eli->li_list_mtx); | |
2885 | mutex_unlock(&ext4_li_mtx); | |
2886 | goto cont_thread; | |
2887 | } | |
2888 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
2889 | kfree(ext4_li_info); |
2890 | ext4_li_info = NULL; | |
2891 | mutex_unlock(&ext4_li_mtx); | |
2892 | ||
2893 | return 0; | |
2894 | } | |
2895 | ||
2896 | static void ext4_clear_request_list(void) | |
2897 | { | |
2898 | struct list_head *pos, *n; | |
2899 | struct ext4_li_request *elr; | |
2900 | ||
2901 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2902 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2903 | elr = list_entry(pos, struct ext4_li_request, | |
2904 | lr_request); | |
2905 | ext4_remove_li_request(elr); | |
2906 | } | |
2907 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2908 | } | |
2909 | ||
2910 | static int ext4_run_lazyinit_thread(void) | |
2911 | { | |
8f1f7453 ES |
2912 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2913 | ext4_li_info, "ext4lazyinit"); | |
2914 | if (IS_ERR(ext4_lazyinit_task)) { | |
2915 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 2916 | ext4_clear_request_list(); |
bfff6873 LC |
2917 | kfree(ext4_li_info); |
2918 | ext4_li_info = NULL; | |
92b97816 | 2919 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
2920 | "initialization thread\n", |
2921 | err); | |
2922 | return err; | |
2923 | } | |
2924 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
2925 | return 0; |
2926 | } | |
2927 | ||
2928 | /* | |
2929 | * Check whether it make sense to run itable init. thread or not. | |
2930 | * If there is at least one uninitialized inode table, return | |
2931 | * corresponding group number, else the loop goes through all | |
2932 | * groups and return total number of groups. | |
2933 | */ | |
2934 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2935 | { | |
2936 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2937 | struct ext4_group_desc *gdp = NULL; | |
2938 | ||
2939 | for (group = 0; group < ngroups; group++) { | |
2940 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2941 | if (!gdp) | |
2942 | continue; | |
2943 | ||
2944 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2945 | break; | |
2946 | } | |
2947 | ||
2948 | return group; | |
2949 | } | |
2950 | ||
2951 | static int ext4_li_info_new(void) | |
2952 | { | |
2953 | struct ext4_lazy_init *eli = NULL; | |
2954 | ||
2955 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2956 | if (!eli) | |
2957 | return -ENOMEM; | |
2958 | ||
bfff6873 LC |
2959 | INIT_LIST_HEAD(&eli->li_request_list); |
2960 | mutex_init(&eli->li_list_mtx); | |
2961 | ||
bfff6873 LC |
2962 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
2963 | ||
2964 | ext4_li_info = eli; | |
2965 | ||
2966 | return 0; | |
2967 | } | |
2968 | ||
2969 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2970 | ext4_group_t start) | |
2971 | { | |
2972 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2973 | struct ext4_li_request *elr; | |
2974 | unsigned long rnd; | |
2975 | ||
2976 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2977 | if (!elr) | |
2978 | return NULL; | |
2979 | ||
2980 | elr->lr_super = sb; | |
2981 | elr->lr_sbi = sbi; | |
2982 | elr->lr_next_group = start; | |
2983 | ||
2984 | /* | |
2985 | * Randomize first schedule time of the request to | |
2986 | * spread the inode table initialization requests | |
2987 | * better. | |
2988 | */ | |
2989 | get_random_bytes(&rnd, sizeof(rnd)); | |
2990 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2991 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2992 | ||
2993 | return elr; | |
2994 | } | |
2995 | ||
7f511862 TT |
2996 | int ext4_register_li_request(struct super_block *sb, |
2997 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
2998 | { |
2999 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3000 | struct ext4_li_request *elr = NULL; |
bfff6873 | 3001 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; |
6c5a6cb9 | 3002 | int ret = 0; |
bfff6873 | 3003 | |
7f511862 | 3004 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3005 | if (sbi->s_li_request != NULL) { |
3006 | /* | |
3007 | * Reset timeout so it can be computed again, because | |
3008 | * s_li_wait_mult might have changed. | |
3009 | */ | |
3010 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 3011 | goto out; |
51ce6511 | 3012 | } |
bfff6873 LC |
3013 | |
3014 | if (first_not_zeroed == ngroups || | |
3015 | (sb->s_flags & MS_RDONLY) || | |
55ff3840 | 3016 | !test_opt(sb, INIT_INODE_TABLE)) |
7f511862 | 3017 | goto out; |
bfff6873 LC |
3018 | |
3019 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
3020 | if (!elr) { |
3021 | ret = -ENOMEM; | |
3022 | goto out; | |
3023 | } | |
bfff6873 LC |
3024 | |
3025 | if (NULL == ext4_li_info) { | |
3026 | ret = ext4_li_info_new(); | |
3027 | if (ret) | |
3028 | goto out; | |
3029 | } | |
3030 | ||
3031 | mutex_lock(&ext4_li_info->li_list_mtx); | |
3032 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
3033 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3034 | ||
3035 | sbi->s_li_request = elr; | |
46e4690b TM |
3036 | /* |
3037 | * set elr to NULL here since it has been inserted to | |
3038 | * the request_list and the removal and free of it is | |
3039 | * handled by ext4_clear_request_list from now on. | |
3040 | */ | |
3041 | elr = NULL; | |
bfff6873 LC |
3042 | |
3043 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
3044 | ret = ext4_run_lazyinit_thread(); | |
3045 | if (ret) | |
3046 | goto out; | |
3047 | } | |
bfff6873 | 3048 | out: |
beed5ecb NK |
3049 | mutex_unlock(&ext4_li_mtx); |
3050 | if (ret) | |
bfff6873 | 3051 | kfree(elr); |
bfff6873 LC |
3052 | return ret; |
3053 | } | |
3054 | ||
3055 | /* | |
3056 | * We do not need to lock anything since this is called on | |
3057 | * module unload. | |
3058 | */ | |
3059 | static void ext4_destroy_lazyinit_thread(void) | |
3060 | { | |
3061 | /* | |
3062 | * If thread exited earlier | |
3063 | * there's nothing to be done. | |
3064 | */ | |
8f1f7453 | 3065 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3066 | return; |
3067 | ||
8f1f7453 | 3068 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3069 | } |
3070 | ||
25ed6e8a DW |
3071 | static int set_journal_csum_feature_set(struct super_block *sb) |
3072 | { | |
3073 | int ret = 1; | |
3074 | int compat, incompat; | |
3075 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3076 | ||
3077 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3078 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3079 | /* journal checksum v2 */ | |
3080 | compat = 0; | |
3081 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; | |
3082 | } else { | |
3083 | /* journal checksum v1 */ | |
3084 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
3085 | incompat = 0; | |
3086 | } | |
3087 | ||
3088 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
3089 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3090 | compat, 0, | |
3091 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3092 | incompat); | |
3093 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
3094 | ret = jbd2_journal_set_features(sbi->s_journal, | |
3095 | compat, 0, | |
3096 | incompat); | |
3097 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
3098 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3099 | } else { | |
3100 | jbd2_journal_clear_features(sbi->s_journal, | |
3101 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3102 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
3103 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
3104 | } | |
3105 | ||
3106 | return ret; | |
3107 | } | |
3108 | ||
952fc18e TT |
3109 | /* |
3110 | * Note: calculating the overhead so we can be compatible with | |
3111 | * historical BSD practice is quite difficult in the face of | |
3112 | * clusters/bigalloc. This is because multiple metadata blocks from | |
3113 | * different block group can end up in the same allocation cluster. | |
3114 | * Calculating the exact overhead in the face of clustered allocation | |
3115 | * requires either O(all block bitmaps) in memory or O(number of block | |
3116 | * groups**2) in time. We will still calculate the superblock for | |
3117 | * older file systems --- and if we come across with a bigalloc file | |
3118 | * system with zero in s_overhead_clusters the estimate will be close to | |
3119 | * correct especially for very large cluster sizes --- but for newer | |
3120 | * file systems, it's better to calculate this figure once at mkfs | |
3121 | * time, and store it in the superblock. If the superblock value is | |
3122 | * present (even for non-bigalloc file systems), we will use it. | |
3123 | */ | |
3124 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
3125 | char *buf) | |
3126 | { | |
3127 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3128 | struct ext4_group_desc *gdp; | |
3129 | ext4_fsblk_t first_block, last_block, b; | |
3130 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3131 | int s, j, count = 0; | |
3132 | ||
0548bbb8 TT |
3133 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) |
3134 | return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + | |
3135 | sbi->s_itb_per_group + 2); | |
3136 | ||
952fc18e TT |
3137 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
3138 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
3139 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
3140 | for (i = 0; i < ngroups; i++) { | |
3141 | gdp = ext4_get_group_desc(sb, i, NULL); | |
3142 | b = ext4_block_bitmap(sb, gdp); | |
3143 | if (b >= first_block && b <= last_block) { | |
3144 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3145 | count++; | |
3146 | } | |
3147 | b = ext4_inode_bitmap(sb, gdp); | |
3148 | if (b >= first_block && b <= last_block) { | |
3149 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
3150 | count++; | |
3151 | } | |
3152 | b = ext4_inode_table(sb, gdp); | |
3153 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
3154 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
3155 | int c = EXT4_B2C(sbi, b - first_block); | |
3156 | ext4_set_bit(c, buf); | |
3157 | count++; | |
3158 | } | |
3159 | if (i != grp) | |
3160 | continue; | |
3161 | s = 0; | |
3162 | if (ext4_bg_has_super(sb, grp)) { | |
3163 | ext4_set_bit(s++, buf); | |
3164 | count++; | |
3165 | } | |
3166 | for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { | |
3167 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
3168 | count++; | |
3169 | } | |
3170 | } | |
3171 | if (!count) | |
3172 | return 0; | |
3173 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
3174 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
3175 | } | |
3176 | ||
3177 | /* | |
3178 | * Compute the overhead and stash it in sbi->s_overhead | |
3179 | */ | |
3180 | int ext4_calculate_overhead(struct super_block *sb) | |
3181 | { | |
3182 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3183 | struct ext4_super_block *es = sbi->s_es; | |
3184 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
3185 | ext4_fsblk_t overhead = 0; | |
3186 | char *buf = (char *) get_zeroed_page(GFP_KERNEL); | |
3187 | ||
952fc18e TT |
3188 | if (!buf) |
3189 | return -ENOMEM; | |
3190 | ||
3191 | /* | |
3192 | * Compute the overhead (FS structures). This is constant | |
3193 | * for a given filesystem unless the number of block groups | |
3194 | * changes so we cache the previous value until it does. | |
3195 | */ | |
3196 | ||
3197 | /* | |
3198 | * All of the blocks before first_data_block are overhead | |
3199 | */ | |
3200 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
3201 | ||
3202 | /* | |
3203 | * Add the overhead found in each block group | |
3204 | */ | |
3205 | for (i = 0; i < ngroups; i++) { | |
3206 | int blks; | |
3207 | ||
3208 | blks = count_overhead(sb, i, buf); | |
3209 | overhead += blks; | |
3210 | if (blks) | |
3211 | memset(buf, 0, PAGE_SIZE); | |
3212 | cond_resched(); | |
3213 | } | |
0875a2b4 ES |
3214 | /* Add the journal blocks as well */ |
3215 | if (sbi->s_journal) | |
810da240 | 3216 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); |
0875a2b4 | 3217 | |
952fc18e TT |
3218 | sbi->s_overhead = overhead; |
3219 | smp_wmb(); | |
3220 | free_page((unsigned long) buf); | |
3221 | return 0; | |
3222 | } | |
3223 | ||
27dd4385 LC |
3224 | |
3225 | static ext4_fsblk_t ext4_calculate_resv_clusters(struct ext4_sb_info *sbi) | |
3226 | { | |
3227 | ext4_fsblk_t resv_clusters; | |
3228 | ||
3229 | /* | |
3230 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
3231 | * This should cover the situations where we can not afford to run | |
3232 | * out of space like for example punch hole, or converting | |
3233 | * uninitialized extents in delalloc path. In most cases such | |
3234 | * allocation would require 1, or 2 blocks, higher numbers are | |
3235 | * very rare. | |
3236 | */ | |
3237 | resv_clusters = ext4_blocks_count(sbi->s_es) >> sbi->s_cluster_bits; | |
3238 | ||
3239 | do_div(resv_clusters, 50); | |
3240 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
3241 | ||
3242 | return resv_clusters; | |
3243 | } | |
3244 | ||
3245 | ||
3246 | static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) | |
3247 | { | |
3248 | ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> | |
3249 | sbi->s_cluster_bits; | |
3250 | ||
3251 | if (count >= clusters) | |
3252 | return -EINVAL; | |
3253 | ||
3254 | atomic64_set(&sbi->s_resv_clusters, count); | |
3255 | return 0; | |
3256 | } | |
3257 | ||
2b2d6d01 | 3258 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
ac27a0ec | 3259 | { |
d4c402d9 | 3260 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3261 | struct buffer_head *bh; |
617ba13b MC |
3262 | struct ext4_super_block *es = NULL; |
3263 | struct ext4_sb_info *sbi; | |
3264 | ext4_fsblk_t block; | |
3265 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3266 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3267 | unsigned long offset = 0; |
ac27a0ec DK |
3268 | unsigned long journal_devnum = 0; |
3269 | unsigned long def_mount_opts; | |
3270 | struct inode *root; | |
9f6200bb | 3271 | char *cp; |
0390131b | 3272 | const char *descr; |
dcc7dae3 | 3273 | int ret = -ENOMEM; |
281b5995 | 3274 | int blocksize, clustersize; |
4ec11028 TT |
3275 | unsigned int db_count; |
3276 | unsigned int i; | |
281b5995 | 3277 | int needs_recovery, has_huge_files, has_bigalloc; |
bd81d8ee | 3278 | __u64 blocks_count; |
07aa2ea1 | 3279 | int err = 0; |
b3881f74 | 3280 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3281 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3282 | |
3283 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3284 | if (!sbi) | |
dcc7dae3 | 3285 | goto out_free_orig; |
705895b6 PE |
3286 | |
3287 | sbi->s_blockgroup_lock = | |
3288 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3289 | if (!sbi->s_blockgroup_lock) { | |
3290 | kfree(sbi); | |
dcc7dae3 | 3291 | goto out_free_orig; |
705895b6 | 3292 | } |
ac27a0ec | 3293 | sb->s_fs_info = sbi; |
2c0544b2 | 3294 | sbi->s_sb = sb; |
240799cd | 3295 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3296 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3297 | if (sb->s_bdev->bd_part) |
3298 | sbi->s_sectors_written_start = | |
3299 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3300 | |
9f6200bb TT |
3301 | /* Cleanup superblock name */ |
3302 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3303 | *cp = '!'; | |
3304 | ||
07aa2ea1 | 3305 | /* -EINVAL is default */ |
dcc7dae3 | 3306 | ret = -EINVAL; |
617ba13b | 3307 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3308 | if (!blocksize) { |
b31e1552 | 3309 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3310 | goto out_fail; |
3311 | } | |
3312 | ||
3313 | /* | |
617ba13b | 3314 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3315 | * block sizes. We need to calculate the offset from buffer start. |
3316 | */ | |
617ba13b | 3317 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3318 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3319 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3320 | } else { |
70bbb3e0 | 3321 | logical_sb_block = sb_block; |
ac27a0ec DK |
3322 | } |
3323 | ||
70bbb3e0 | 3324 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3325 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3326 | goto out_fail; |
3327 | } | |
3328 | /* | |
3329 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3330 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3331 | */ |
2716b802 | 3332 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
3333 | sbi->s_es = es; |
3334 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3335 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3336 | goto cantfind_ext4; | |
afc32f7e | 3337 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 3338 | |
feb0ab32 DW |
3339 | /* Warn if metadata_csum and gdt_csum are both set. */ |
3340 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3341 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
3342 | EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) | |
3343 | ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " | |
3344 | "redundant flags; please run fsck."); | |
3345 | ||
d25425f8 DW |
3346 | /* Check for a known checksum algorithm */ |
3347 | if (!ext4_verify_csum_type(sb, es)) { | |
3348 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3349 | "unknown checksum algorithm."); | |
3350 | silent = 1; | |
3351 | goto cantfind_ext4; | |
3352 | } | |
3353 | ||
0441984a DW |
3354 | /* Load the checksum driver */ |
3355 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3356 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { | |
3357 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
3358 | if (IS_ERR(sbi->s_chksum_driver)) { | |
3359 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
3360 | ret = PTR_ERR(sbi->s_chksum_driver); | |
3361 | sbi->s_chksum_driver = NULL; | |
3362 | goto failed_mount; | |
3363 | } | |
3364 | } | |
3365 | ||
a9c47317 DW |
3366 | /* Check superblock checksum */ |
3367 | if (!ext4_superblock_csum_verify(sb, es)) { | |
3368 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
3369 | "invalid superblock checksum. Run e2fsck?"); | |
3370 | silent = 1; | |
3371 | goto cantfind_ext4; | |
3372 | } | |
3373 | ||
3374 | /* Precompute checksum seed for all metadata */ | |
3375 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3376 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) | |
3377 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, | |
3378 | sizeof(es->s_uuid)); | |
3379 | ||
ac27a0ec DK |
3380 | /* Set defaults before we parse the mount options */ |
3381 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3382 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3383 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3384 | set_opt(sb, DEBUG); |
87f26807 | 3385 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) |
fd8c37ec | 3386 | set_opt(sb, GRPID); |
617ba13b | 3387 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3388 | set_opt(sb, NO_UID32); |
ea663336 | 3389 | /* xattr user namespace & acls are now defaulted on */ |
ea663336 | 3390 | set_opt(sb, XATTR_USER); |
03010a33 | 3391 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3392 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3393 | #endif |
617ba13b | 3394 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3395 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3396 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3397 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3398 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3399 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3400 | |
3401 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3402 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3403 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3404 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3405 | else |
fd8c37ec | 3406 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3407 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3408 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3409 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3410 | set_opt(sb, DISCARD); |
ac27a0ec | 3411 | |
08cefc7a EB |
3412 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
3413 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
3414 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3415 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3416 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3417 | |
8b67f04a | 3418 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3419 | set_opt(sb, BARRIER); |
ac27a0ec | 3420 | |
dd919b98 AK |
3421 | /* |
3422 | * enable delayed allocation by default | |
3423 | * Use -o nodelalloc to turn it off | |
3424 | */ | |
bc0b75f7 | 3425 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && |
8b67f04a | 3426 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) |
fd8c37ec | 3427 | set_opt(sb, DELALLOC); |
dd919b98 | 3428 | |
51ce6511 LC |
3429 | /* |
3430 | * set default s_li_wait_mult for lazyinit, for the case there is | |
3431 | * no mount option specified. | |
3432 | */ | |
3433 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
3434 | ||
8b67f04a | 3435 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
661aa520 | 3436 | &journal_devnum, &journal_ioprio, 0)) { |
8b67f04a TT |
3437 | ext4_msg(sb, KERN_WARNING, |
3438 | "failed to parse options in superblock: %s", | |
3439 | sbi->s_es->s_mount_opts); | |
3440 | } | |
5a916be1 | 3441 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
b3881f74 | 3442 | if (!parse_options((char *) data, sb, &journal_devnum, |
661aa520 | 3443 | &journal_ioprio, 0)) |
ac27a0ec DK |
3444 | goto failed_mount; |
3445 | ||
56889787 TT |
3446 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
3447 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " | |
3448 | "with data=journal disables delayed " | |
3449 | "allocation and O_DIRECT support!\n"); | |
3450 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
3451 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3452 | "both data=journal and delalloc"); | |
3453 | goto failed_mount; | |
3454 | } | |
3455 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
3456 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
3457 | "both data=journal and delalloc"); | |
3458 | goto failed_mount; | |
3459 | } | |
3460 | if (test_opt(sb, DELALLOC)) | |
3461 | clear_opt(sb, DELALLOC); | |
3462 | } | |
3463 | ||
ac27a0ec | 3464 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
482a7425 | 3465 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3466 | |
617ba13b MC |
3467 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3468 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3469 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3470 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3471 | ext4_msg(sb, KERN_WARNING, |
3472 | "feature flags set on rev 0 fs, " | |
3473 | "running e2fsck is recommended"); | |
469108ff | 3474 | |
2035e776 TT |
3475 | if (IS_EXT2_SB(sb)) { |
3476 | if (ext2_feature_set_ok(sb)) | |
3477 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
3478 | "using the ext4 subsystem"); | |
3479 | else { | |
3480 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
3481 | "to feature incompatibilities"); | |
3482 | goto failed_mount; | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | if (IS_EXT3_SB(sb)) { | |
3487 | if (ext3_feature_set_ok(sb)) | |
3488 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
3489 | "using the ext4 subsystem"); | |
3490 | else { | |
3491 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
3492 | "to feature incompatibilities"); | |
3493 | goto failed_mount; | |
3494 | } | |
3495 | } | |
3496 | ||
ac27a0ec DK |
3497 | /* |
3498 | * Check feature flags regardless of the revision level, since we | |
3499 | * previously didn't change the revision level when setting the flags, | |
3500 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3501 | */ | |
a13fb1a4 | 3502 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3503 | goto failed_mount; |
a13fb1a4 | 3504 | |
261cb20c | 3505 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
617ba13b MC |
3506 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3507 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3508 | ext4_msg(sb, KERN_ERR, |
3509 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3510 | goto failed_mount; |
3511 | } | |
3512 | ||
ac27a0ec | 3513 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3514 | /* Validate the filesystem blocksize */ |
3515 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3516 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3517 | blocksize); |
ac27a0ec DK |
3518 | goto failed_mount; |
3519 | } | |
3520 | ||
2b2d6d01 | 3521 | brelse(bh); |
70bbb3e0 AM |
3522 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3523 | offset = do_div(logical_sb_block, blocksize); | |
3524 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3525 | if (!bh) { |
b31e1552 ES |
3526 | ext4_msg(sb, KERN_ERR, |
3527 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3528 | goto failed_mount; |
3529 | } | |
2716b802 | 3530 | es = (struct ext4_super_block *)(bh->b_data + offset); |
ac27a0ec | 3531 | sbi->s_es = es; |
617ba13b | 3532 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3533 | ext4_msg(sb, KERN_ERR, |
3534 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3535 | goto failed_mount; |
3536 | } | |
3537 | } | |
3538 | ||
a13fb1a4 ES |
3539 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3540 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3541 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3542 | has_huge_files); | |
3543 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3544 | |
617ba13b MC |
3545 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3546 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3547 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3548 | } else { |
3549 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3550 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3551 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3552 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3553 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3554 | ext4_msg(sb, KERN_ERR, |
3555 | "unsupported inode size: %d", | |
2b2d6d01 | 3556 | sbi->s_inode_size); |
ac27a0ec DK |
3557 | goto failed_mount; |
3558 | } | |
ef7f3835 KS |
3559 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3560 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3561 | } |
0b8e58a1 | 3562 | |
0d1ee42f AR |
3563 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3564 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3565 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3566 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3567 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3568 | ext4_msg(sb, KERN_ERR, |
3569 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3570 | sbi->s_desc_size); |
3571 | goto failed_mount; | |
3572 | } | |
3573 | } else | |
3574 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3575 | |
ac27a0ec | 3576 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3577 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3578 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3579 | goto cantfind_ext4; |
0b8e58a1 | 3580 | |
617ba13b | 3581 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3582 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3583 | goto cantfind_ext4; |
ac27a0ec DK |
3584 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3585 | sbi->s_inodes_per_block; | |
0d1ee42f | 3586 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3587 | sbi->s_sbh = bh; |
3588 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3589 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3590 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3591 | |
68911009 LC |
3592 | /* Do we have standard group size of blocksize * 8 blocks ? */ |
3593 | if (sbi->s_blocks_per_group == blocksize << 3) | |
3594 | set_opt2(sb, STD_GROUP_SIZE); | |
3595 | ||
2b2d6d01 | 3596 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3597 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3598 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3599 | i = le32_to_cpu(es->s_flags); |
3600 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3601 | sbi->s_hash_unsigned = 3; | |
3602 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3603 | #ifdef __CHAR_UNSIGNED__ | |
3604 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3605 | sbi->s_hash_unsigned = 3; | |
3606 | #else | |
3607 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3608 | #endif | |
f99b2589 | 3609 | } |
ac27a0ec | 3610 | |
281b5995 TT |
3611 | /* Handle clustersize */ |
3612 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
3613 | has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3614 | EXT4_FEATURE_RO_COMPAT_BIGALLOC); | |
3615 | if (has_bigalloc) { | |
3616 | if (clustersize < blocksize) { | |
3617 | ext4_msg(sb, KERN_ERR, | |
3618 | "cluster size (%d) smaller than " | |
3619 | "block size (%d)", clustersize, blocksize); | |
3620 | goto failed_mount; | |
3621 | } | |
3622 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
3623 | le32_to_cpu(es->s_log_block_size); | |
3624 | sbi->s_clusters_per_group = | |
3625 | le32_to_cpu(es->s_clusters_per_group); | |
3626 | if (sbi->s_clusters_per_group > blocksize * 8) { | |
3627 | ext4_msg(sb, KERN_ERR, | |
3628 | "#clusters per group too big: %lu", | |
3629 | sbi->s_clusters_per_group); | |
3630 | goto failed_mount; | |
3631 | } | |
3632 | if (sbi->s_blocks_per_group != | |
3633 | (sbi->s_clusters_per_group * (clustersize / blocksize))) { | |
3634 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " | |
3635 | "clusters per group (%lu) inconsistent", | |
3636 | sbi->s_blocks_per_group, | |
3637 | sbi->s_clusters_per_group); | |
3638 | goto failed_mount; | |
3639 | } | |
3640 | } else { | |
3641 | if (clustersize != blocksize) { | |
3642 | ext4_warning(sb, "fragment/cluster size (%d) != " | |
3643 | "block size (%d)", clustersize, | |
3644 | blocksize); | |
3645 | clustersize = blocksize; | |
3646 | } | |
3647 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
3648 | ext4_msg(sb, KERN_ERR, | |
3649 | "#blocks per group too big: %lu", | |
3650 | sbi->s_blocks_per_group); | |
3651 | goto failed_mount; | |
3652 | } | |
3653 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
3654 | sbi->s_cluster_bits = 0; | |
ac27a0ec | 3655 | } |
281b5995 TT |
3656 | sbi->s_cluster_ratio = clustersize / blocksize; |
3657 | ||
ac27a0ec | 3658 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3659 | ext4_msg(sb, KERN_ERR, |
3660 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3661 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3662 | goto failed_mount; |
3663 | } | |
3664 | ||
bf43d84b ES |
3665 | /* |
3666 | * Test whether we have more sectors than will fit in sector_t, | |
3667 | * and whether the max offset is addressable by the page cache. | |
3668 | */ | |
5a9ae68a | 3669 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3670 | ext4_blocks_count(es)); |
5a9ae68a | 3671 | if (err) { |
b31e1552 | 3672 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3673 | " too large to mount safely on this system"); |
ac27a0ec | 3674 | if (sizeof(sector_t) < 8) |
90c699a9 | 3675 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3676 | goto failed_mount; |
3677 | } | |
3678 | ||
617ba13b MC |
3679 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3680 | goto cantfind_ext4; | |
e7c95593 | 3681 | |
0f2ddca6 FTN |
3682 | /* check blocks count against device size */ |
3683 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3684 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3685 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3686 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3687 | ext4_blocks_count(es), blocks_count); |
3688 | goto failed_mount; | |
3689 | } | |
3690 | ||
0b8e58a1 AD |
3691 | /* |
3692 | * It makes no sense for the first data block to be beyond the end | |
3693 | * of the filesystem. | |
3694 | */ | |
3695 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
5635a62b | 3696 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " |
b31e1552 ES |
3697 | "block %u is beyond end of filesystem (%llu)", |
3698 | le32_to_cpu(es->s_first_data_block), | |
3699 | ext4_blocks_count(es)); | |
e7c95593 ES |
3700 | goto failed_mount; |
3701 | } | |
bd81d8ee LV |
3702 | blocks_count = (ext4_blocks_count(es) - |
3703 | le32_to_cpu(es->s_first_data_block) + | |
3704 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3705 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3706 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3707 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3708 | "(block count %llu, first data block %u, " |
b31e1552 | 3709 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3710 | ext4_blocks_count(es), |
3711 | le32_to_cpu(es->s_first_data_block), | |
3712 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3713 | goto failed_mount; | |
3714 | } | |
bd81d8ee | 3715 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3716 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3717 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3718 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3719 | EXT4_DESC_PER_BLOCK(sb); | |
f18a5f21 TT |
3720 | sbi->s_group_desc = ext4_kvmalloc(db_count * |
3721 | sizeof(struct buffer_head *), | |
3722 | GFP_KERNEL); | |
ac27a0ec | 3723 | if (sbi->s_group_desc == NULL) { |
b31e1552 | 3724 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
2cde417d | 3725 | ret = -ENOMEM; |
ac27a0ec DK |
3726 | goto failed_mount; |
3727 | } | |
3728 | ||
9f6200bb TT |
3729 | if (ext4_proc_root) |
3730 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
240799cd | 3731 | |
66acdcf4 TT |
3732 | if (sbi->s_proc) |
3733 | proc_create_data("options", S_IRUGO, sbi->s_proc, | |
3734 | &ext4_seq_options_fops, sb); | |
3735 | ||
705895b6 | 3736 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3737 | |
3738 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3739 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3740 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3741 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3742 | ext4_msg(sb, KERN_ERR, |
3743 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3744 | db_count = i; |
3745 | goto failed_mount2; | |
3746 | } | |
3747 | } | |
bfff6873 | 3748 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3749 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3750 | goto failed_mount2; |
3751 | } | |
772cb7c8 JS |
3752 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3753 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3754 | ext4_msg(sb, KERN_ERR, |
3755 | "unable to initialize " | |
3756 | "flex_bg meta info!"); | |
772cb7c8 JS |
3757 | goto failed_mount2; |
3758 | } | |
3759 | ||
ac27a0ec DK |
3760 | sbi->s_gdb_count = db_count; |
3761 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3762 | spin_lock_init(&sbi->s_next_gen_lock); | |
3763 | ||
04496411 TM |
3764 | init_timer(&sbi->s_err_report); |
3765 | sbi->s_err_report.function = print_daily_error_info; | |
3766 | sbi->s_err_report.data = (unsigned long) sb; | |
3767 | ||
a75ae78f DM |
3768 | /* Register extent status tree shrinker */ |
3769 | ext4_es_register_shrinker(sb); | |
3770 | ||
57042651 | 3771 | err = percpu_counter_init(&sbi->s_freeclusters_counter, |
5dee5437 | 3772 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3773 | if (!err) { |
3774 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3775 | ext4_count_free_inodes(sb)); | |
3776 | } | |
3777 | if (!err) { | |
3778 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3779 | ext4_count_dirs(sb)); | |
3780 | } | |
3781 | if (!err) { | |
57042651 | 3782 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); |
ce7e010a | 3783 | } |
1ac6466f TT |
3784 | if (!err) { |
3785 | err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0); | |
3786 | } | |
ce7e010a TT |
3787 | if (err) { |
3788 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3789 | goto failed_mount3; | |
3790 | } | |
3791 | ||
c9de560d | 3792 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3793 | sbi->s_max_writeback_mb_bump = 128; |
67a5da56 | 3794 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 3795 | |
ac27a0ec DK |
3796 | /* |
3797 | * set up enough so that it can read an inode | |
3798 | */ | |
9ca92389 TT |
3799 | if (!test_opt(sb, NOLOAD) && |
3800 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3801 | sb->s_op = &ext4_sops; | |
3802 | else | |
3803 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3804 | sb->s_export_op = &ext4_export_ops; |
3805 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3806 | #ifdef CONFIG_QUOTA |
617ba13b | 3807 | sb->dq_op = &ext4_quota_operations; |
262b4662 | 3808 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) |
7c319d32 | 3809 | sb->s_qcop = &ext4_qctl_sysfile_operations; |
262b4662 JK |
3810 | else |
3811 | sb->s_qcop = &ext4_qctl_operations; | |
ac27a0ec | 3812 | #endif |
f2fa2ffc AK |
3813 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3814 | ||
ac27a0ec | 3815 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3816 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec DK |
3817 | |
3818 | sb->s_root = NULL; | |
3819 | ||
3820 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3821 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3822 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec | 3823 | |
c5e06d10 JL |
3824 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && |
3825 | !(sb->s_flags & MS_RDONLY)) | |
3826 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) | |
3827 | goto failed_mount3; | |
3828 | ||
ac27a0ec DK |
3829 | /* |
3830 | * The first inode we look at is the journal inode. Don't try | |
3831 | * root first: it may be modified in the journal! | |
3832 | */ | |
3833 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3834 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3835 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3836 | goto failed_mount3; |
0390131b FM |
3837 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3838 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3839 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3840 | "suppressed and not mounted read-only"); | |
744692dc | 3841 | goto failed_mount_wq; |
ac27a0ec | 3842 | } else { |
fd8c37ec | 3843 | clear_opt(sb, DATA_FLAGS); |
0390131b FM |
3844 | sbi->s_journal = NULL; |
3845 | needs_recovery = 0; | |
3846 | goto no_journal; | |
ac27a0ec DK |
3847 | } |
3848 | ||
f32aaf2d | 3849 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && |
eb40a09c JS |
3850 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, |
3851 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3852 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3853 | goto failed_mount_wq; |
eb40a09c JS |
3854 | } |
3855 | ||
25ed6e8a DW |
3856 | if (!set_journal_csum_feature_set(sb)) { |
3857 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
3858 | "feature set"); | |
3859 | goto failed_mount_wq; | |
d4da6c9c | 3860 | } |
818d276c | 3861 | |
ac27a0ec DK |
3862 | /* We have now updated the journal if required, so we can |
3863 | * validate the data journaling mode. */ | |
3864 | switch (test_opt(sb, DATA_FLAGS)) { | |
3865 | case 0: | |
3866 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3867 | * capabilities: ORDERED_DATA if the journal can |
3868 | * cope, else JOURNAL_DATA | |
3869 | */ | |
dab291af MC |
3870 | if (jbd2_journal_check_available_features |
3871 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3872 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3873 | else |
fd8c37ec | 3874 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3875 | break; |
3876 | ||
617ba13b MC |
3877 | case EXT4_MOUNT_ORDERED_DATA: |
3878 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3879 | if (!jbd2_journal_check_available_features |
3880 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3881 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3882 | "requested data journaling mode"); | |
744692dc | 3883 | goto failed_mount_wq; |
ac27a0ec DK |
3884 | } |
3885 | default: | |
3886 | break; | |
3887 | } | |
b3881f74 | 3888 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3889 | |
18aadd47 BJ |
3890 | sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; |
3891 | ||
ce7e010a TT |
3892 | /* |
3893 | * The journal may have updated the bg summary counts, so we | |
3894 | * need to update the global counters. | |
3895 | */ | |
57042651 | 3896 | percpu_counter_set(&sbi->s_freeclusters_counter, |
5dee5437 | 3897 | ext4_count_free_clusters(sb)); |
ce7e010a TT |
3898 | percpu_counter_set(&sbi->s_freeinodes_counter, |
3899 | ext4_count_free_inodes(sb)); | |
3900 | percpu_counter_set(&sbi->s_dirs_counter, | |
3901 | ext4_count_dirs(sb)); | |
57042651 | 3902 | percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); |
206f7ab4 | 3903 | |
ce7e010a | 3904 | no_journal: |
952fc18e TT |
3905 | /* |
3906 | * Get the # of file system overhead blocks from the | |
3907 | * superblock if present. | |
3908 | */ | |
3909 | if (es->s_overhead_clusters) | |
3910 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); | |
3911 | else { | |
07aa2ea1 LC |
3912 | err = ext4_calculate_overhead(sb); |
3913 | if (err) | |
952fc18e TT |
3914 | goto failed_mount_wq; |
3915 | } | |
3916 | ||
fd89d5f2 TH |
3917 | /* |
3918 | * The maximum number of concurrent works can be high and | |
3919 | * concurrency isn't really necessary. Limit it to 1. | |
3920 | */ | |
3921 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3922 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3923 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3924 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
07aa2ea1 | 3925 | ret = -ENOMEM; |
4c0425ff MC |
3926 | goto failed_mount_wq; |
3927 | } | |
3928 | ||
ac27a0ec | 3929 | /* |
dab291af | 3930 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3931 | * so we can safely mount the rest of the filesystem now. |
3932 | */ | |
3933 | ||
1d1fe1ee DH |
3934 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3935 | if (IS_ERR(root)) { | |
b31e1552 | 3936 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3937 | ret = PTR_ERR(root); |
32a9bb57 | 3938 | root = NULL; |
ac27a0ec DK |
3939 | goto failed_mount4; |
3940 | } | |
3941 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3942 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 3943 | iput(root); |
ac27a0ec DK |
3944 | goto failed_mount4; |
3945 | } | |
48fde701 | 3946 | sb->s_root = d_make_root(root); |
1d1fe1ee | 3947 | if (!sb->s_root) { |
b31e1552 | 3948 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3949 | ret = -ENOMEM; |
3950 | goto failed_mount4; | |
3951 | } | |
ac27a0ec | 3952 | |
7e84b621 ES |
3953 | if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) |
3954 | sb->s_flags |= MS_RDONLY; | |
ef7f3835 KS |
3955 | |
3956 | /* determine the minimum size of new large inodes, if present */ | |
3957 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3958 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3959 | EXT4_GOOD_OLD_INODE_SIZE; | |
3960 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3961 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3962 | if (sbi->s_want_extra_isize < | |
3963 | le16_to_cpu(es->s_want_extra_isize)) | |
3964 | sbi->s_want_extra_isize = | |
3965 | le16_to_cpu(es->s_want_extra_isize); | |
3966 | if (sbi->s_want_extra_isize < | |
3967 | le16_to_cpu(es->s_min_extra_isize)) | |
3968 | sbi->s_want_extra_isize = | |
3969 | le16_to_cpu(es->s_min_extra_isize); | |
3970 | } | |
3971 | } | |
3972 | /* Check if enough inode space is available */ | |
3973 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3974 | sbi->s_inode_size) { | |
3975 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3976 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3977 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3978 | "available"); | |
ef7f3835 KS |
3979 | } |
3980 | ||
27dd4385 LC |
3981 | err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sbi)); |
3982 | if (err) { | |
3983 | ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " | |
3984 | "reserved pool", ext4_calculate_resv_clusters(sbi)); | |
3985 | goto failed_mount4a; | |
3986 | } | |
3987 | ||
6fd058f7 TT |
3988 | err = ext4_setup_system_zone(sb); |
3989 | if (err) { | |
b31e1552 | 3990 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3991 | "zone (%d)", err); |
94bf608a | 3992 | goto failed_mount4a; |
6fd058f7 TT |
3993 | } |
3994 | ||
c2774d84 | 3995 | ext4_ext_init(sb); |
9d99012f | 3996 | err = ext4_mb_init(sb); |
c2774d84 | 3997 | if (err) { |
421f91d2 | 3998 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3999 | err); |
dcf2d804 | 4000 | goto failed_mount5; |
c2774d84 AK |
4001 | } |
4002 | ||
bfff6873 LC |
4003 | err = ext4_register_li_request(sb, first_not_zeroed); |
4004 | if (err) | |
dcf2d804 | 4005 | goto failed_mount6; |
bfff6873 | 4006 | |
3197ebdb TT |
4007 | sbi->s_kobj.kset = ext4_kset; |
4008 | init_completion(&sbi->s_kobj_unregister); | |
4009 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
4010 | "%s", sb->s_id); | |
dcf2d804 TM |
4011 | if (err) |
4012 | goto failed_mount7; | |
3197ebdb | 4013 | |
9b2ff357 JK |
4014 | #ifdef CONFIG_QUOTA |
4015 | /* Enable quota usage during mount. */ | |
4016 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && | |
4017 | !(sb->s_flags & MS_RDONLY)) { | |
4018 | err = ext4_enable_quotas(sb); | |
4019 | if (err) | |
4020 | goto failed_mount8; | |
4021 | } | |
4022 | #endif /* CONFIG_QUOTA */ | |
4023 | ||
617ba13b MC |
4024 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
4025 | ext4_orphan_cleanup(sb, es); | |
4026 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 4027 | if (needs_recovery) { |
b31e1552 | 4028 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
4029 | ext4_mark_recovery_complete(sb, es); |
4030 | } | |
4031 | if (EXT4_SB(sb)->s_journal) { | |
4032 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
4033 | descr = " journalled data mode"; | |
4034 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
4035 | descr = " ordered data mode"; | |
4036 | else | |
4037 | descr = " writeback data mode"; | |
4038 | } else | |
4039 | descr = "out journal"; | |
4040 | ||
79add3a3 LC |
4041 | if (test_opt(sb, DISCARD)) { |
4042 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
4043 | if (!blk_queue_discard(q)) | |
4044 | ext4_msg(sb, KERN_WARNING, | |
4045 | "mounting with \"discard\" option, but " | |
4046 | "the device does not support discard"); | |
4047 | } | |
4048 | ||
d4c402d9 | 4049 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
4050 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
4051 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 4052 | |
66e61a9e TT |
4053 | if (es->s_error_count) |
4054 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 4055 | |
d4c402d9 | 4056 | kfree(orig_data); |
ac27a0ec DK |
4057 | return 0; |
4058 | ||
617ba13b | 4059 | cantfind_ext4: |
ac27a0ec | 4060 | if (!silent) |
b31e1552 | 4061 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
4062 | goto failed_mount; |
4063 | ||
72ba7450 TT |
4064 | #ifdef CONFIG_QUOTA |
4065 | failed_mount8: | |
4066 | kobject_del(&sbi->s_kobj); | |
4067 | #endif | |
dcf2d804 TM |
4068 | failed_mount7: |
4069 | ext4_unregister_li_request(sb); | |
4070 | failed_mount6: | |
dcf2d804 | 4071 | ext4_mb_release(sb); |
94bf608a AV |
4072 | failed_mount5: |
4073 | ext4_ext_release(sb); | |
dcf2d804 | 4074 | ext4_release_system_zone(sb); |
94bf608a AV |
4075 | failed_mount4a: |
4076 | dput(sb->s_root); | |
32a9bb57 | 4077 | sb->s_root = NULL; |
94bf608a | 4078 | failed_mount4: |
b31e1552 | 4079 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
4080 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
4081 | failed_mount_wq: | |
0390131b FM |
4082 | if (sbi->s_journal) { |
4083 | jbd2_journal_destroy(sbi->s_journal); | |
4084 | sbi->s_journal = NULL; | |
4085 | } | |
ac27a0ec | 4086 | failed_mount3: |
a75ae78f | 4087 | ext4_es_unregister_shrinker(sb); |
04496411 | 4088 | del_timer(&sbi->s_err_report); |
9933fc0a TT |
4089 | if (sbi->s_flex_groups) |
4090 | ext4_kvfree(sbi->s_flex_groups); | |
57042651 | 4091 | percpu_counter_destroy(&sbi->s_freeclusters_counter); |
ce7e010a TT |
4092 | percpu_counter_destroy(&sbi->s_freeinodes_counter); |
4093 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
57042651 | 4094 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); |
1ac6466f | 4095 | percpu_counter_destroy(&sbi->s_extent_cache_cnt); |
c5e06d10 JL |
4096 | if (sbi->s_mmp_tsk) |
4097 | kthread_stop(sbi->s_mmp_tsk); | |
ac27a0ec DK |
4098 | failed_mount2: |
4099 | for (i = 0; i < db_count; i++) | |
4100 | brelse(sbi->s_group_desc[i]); | |
f18a5f21 | 4101 | ext4_kvfree(sbi->s_group_desc); |
ac27a0ec | 4102 | failed_mount: |
0441984a DW |
4103 | if (sbi->s_chksum_driver) |
4104 | crypto_free_shash(sbi->s_chksum_driver); | |
240799cd | 4105 | if (sbi->s_proc) { |
66acdcf4 | 4106 | remove_proc_entry("options", sbi->s_proc); |
9f6200bb | 4107 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 4108 | } |
ac27a0ec DK |
4109 | #ifdef CONFIG_QUOTA |
4110 | for (i = 0; i < MAXQUOTAS; i++) | |
4111 | kfree(sbi->s_qf_names[i]); | |
4112 | #endif | |
617ba13b | 4113 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
4114 | brelse(bh); |
4115 | out_fail: | |
4116 | sb->s_fs_info = NULL; | |
f6830165 | 4117 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 4118 | kfree(sbi); |
dcc7dae3 | 4119 | out_free_orig: |
d4c402d9 | 4120 | kfree(orig_data); |
07aa2ea1 | 4121 | return err ? err : ret; |
ac27a0ec DK |
4122 | } |
4123 | ||
4124 | /* | |
4125 | * Setup any per-fs journal parameters now. We'll do this both on | |
4126 | * initial mount, once the journal has been initialised but before we've | |
4127 | * done any recovery; and again on any subsequent remount. | |
4128 | */ | |
617ba13b | 4129 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 4130 | { |
617ba13b | 4131 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4132 | |
30773840 TT |
4133 | journal->j_commit_interval = sbi->s_commit_interval; |
4134 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
4135 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 4136 | |
a931da6a | 4137 | write_lock(&journal->j_state_lock); |
ac27a0ec | 4138 | if (test_opt(sb, BARRIER)) |
dab291af | 4139 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 4140 | else |
dab291af | 4141 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
4142 | if (test_opt(sb, DATA_ERR_ABORT)) |
4143 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
4144 | else | |
4145 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 4146 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
4147 | } |
4148 | ||
617ba13b | 4149 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
4150 | unsigned int journal_inum) |
4151 | { | |
4152 | struct inode *journal_inode; | |
4153 | journal_t *journal; | |
4154 | ||
0390131b FM |
4155 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4156 | ||
ac27a0ec DK |
4157 | /* First, test for the existence of a valid inode on disk. Bad |
4158 | * things happen if we iget() an unused inode, as the subsequent | |
4159 | * iput() will try to delete it. */ | |
4160 | ||
1d1fe1ee DH |
4161 | journal_inode = ext4_iget(sb, journal_inum); |
4162 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 4163 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
4164 | return NULL; |
4165 | } | |
4166 | if (!journal_inode->i_nlink) { | |
4167 | make_bad_inode(journal_inode); | |
4168 | iput(journal_inode); | |
b31e1552 | 4169 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
4170 | return NULL; |
4171 | } | |
4172 | ||
e5f8eab8 | 4173 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 4174 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 4175 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 4176 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
4177 | iput(journal_inode); |
4178 | return NULL; | |
4179 | } | |
4180 | ||
dab291af | 4181 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 4182 | if (!journal) { |
b31e1552 | 4183 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
4184 | iput(journal_inode); |
4185 | return NULL; | |
4186 | } | |
4187 | journal->j_private = sb; | |
617ba13b | 4188 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
4189 | return journal; |
4190 | } | |
4191 | ||
617ba13b | 4192 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
4193 | dev_t j_dev) |
4194 | { | |
2b2d6d01 | 4195 | struct buffer_head *bh; |
ac27a0ec | 4196 | journal_t *journal; |
617ba13b MC |
4197 | ext4_fsblk_t start; |
4198 | ext4_fsblk_t len; | |
ac27a0ec | 4199 | int hblock, blocksize; |
617ba13b | 4200 | ext4_fsblk_t sb_block; |
ac27a0ec | 4201 | unsigned long offset; |
2b2d6d01 | 4202 | struct ext4_super_block *es; |
ac27a0ec DK |
4203 | struct block_device *bdev; |
4204 | ||
0390131b FM |
4205 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4206 | ||
b31e1552 | 4207 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
4208 | if (bdev == NULL) |
4209 | return NULL; | |
4210 | ||
ac27a0ec | 4211 | blocksize = sb->s_blocksize; |
e1defc4f | 4212 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 4213 | if (blocksize < hblock) { |
b31e1552 ES |
4214 | ext4_msg(sb, KERN_ERR, |
4215 | "blocksize too small for journal device"); | |
ac27a0ec DK |
4216 | goto out_bdev; |
4217 | } | |
4218 | ||
617ba13b MC |
4219 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
4220 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
4221 | set_blocksize(bdev, blocksize); |
4222 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
4223 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
4224 | "external journal"); | |
ac27a0ec DK |
4225 | goto out_bdev; |
4226 | } | |
4227 | ||
2716b802 | 4228 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 4229 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 4230 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 4231 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
4232 | ext4_msg(sb, KERN_ERR, "external journal has " |
4233 | "bad superblock"); | |
ac27a0ec DK |
4234 | brelse(bh); |
4235 | goto out_bdev; | |
4236 | } | |
4237 | ||
617ba13b | 4238 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 4239 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
4240 | brelse(bh); |
4241 | goto out_bdev; | |
4242 | } | |
4243 | ||
bd81d8ee | 4244 | len = ext4_blocks_count(es); |
ac27a0ec DK |
4245 | start = sb_block + 1; |
4246 | brelse(bh); /* we're done with the superblock */ | |
4247 | ||
dab291af | 4248 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
4249 | start, len, blocksize); |
4250 | if (!journal) { | |
b31e1552 | 4251 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
4252 | goto out_bdev; |
4253 | } | |
4254 | journal->j_private = sb; | |
4255 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
4256 | wait_on_buffer(journal->j_sb_buffer); | |
4257 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 4258 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
4259 | goto out_journal; |
4260 | } | |
4261 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
4262 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
4263 | "user (unsupported) - %d", | |
ac27a0ec DK |
4264 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
4265 | goto out_journal; | |
4266 | } | |
617ba13b MC |
4267 | EXT4_SB(sb)->journal_bdev = bdev; |
4268 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 4269 | return journal; |
0b8e58a1 | 4270 | |
ac27a0ec | 4271 | out_journal: |
dab291af | 4272 | jbd2_journal_destroy(journal); |
ac27a0ec | 4273 | out_bdev: |
617ba13b | 4274 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
4275 | return NULL; |
4276 | } | |
4277 | ||
617ba13b MC |
4278 | static int ext4_load_journal(struct super_block *sb, |
4279 | struct ext4_super_block *es, | |
ac27a0ec DK |
4280 | unsigned long journal_devnum) |
4281 | { | |
4282 | journal_t *journal; | |
4283 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
4284 | dev_t journal_dev; | |
4285 | int err = 0; | |
4286 | int really_read_only; | |
4287 | ||
0390131b FM |
4288 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4289 | ||
ac27a0ec DK |
4290 | if (journal_devnum && |
4291 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
4292 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
4293 | "numbers have changed"); | |
ac27a0ec DK |
4294 | journal_dev = new_decode_dev(journal_devnum); |
4295 | } else | |
4296 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
4297 | ||
4298 | really_read_only = bdev_read_only(sb->s_bdev); | |
4299 | ||
4300 | /* | |
4301 | * Are we loading a blank journal or performing recovery after a | |
4302 | * crash? For recovery, we need to check in advance whether we | |
4303 | * can get read-write access to the device. | |
4304 | */ | |
617ba13b | 4305 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 4306 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
4307 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
4308 | "required on readonly filesystem"); | |
ac27a0ec | 4309 | if (really_read_only) { |
b31e1552 ES |
4310 | ext4_msg(sb, KERN_ERR, "write access " |
4311 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
4312 | return -EROFS; |
4313 | } | |
b31e1552 ES |
4314 | ext4_msg(sb, KERN_INFO, "write access will " |
4315 | "be enabled during recovery"); | |
ac27a0ec DK |
4316 | } |
4317 | } | |
4318 | ||
4319 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
4320 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
4321 | "and inode journals!"); | |
ac27a0ec DK |
4322 | return -EINVAL; |
4323 | } | |
4324 | ||
4325 | if (journal_inum) { | |
617ba13b | 4326 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
4327 | return -EINVAL; |
4328 | } else { | |
617ba13b | 4329 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
4330 | return -EINVAL; |
4331 | } | |
4332 | ||
90576c0b | 4333 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 4334 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 4335 | |
617ba13b | 4336 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 4337 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
4338 | if (!err) { |
4339 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
4340 | if (save) | |
4341 | memcpy(save, ((char *) es) + | |
4342 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 4343 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
4344 | if (save) |
4345 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
4346 | save, EXT4_S_ERR_LEN); | |
4347 | kfree(save); | |
4348 | } | |
ac27a0ec DK |
4349 | |
4350 | if (err) { | |
b31e1552 | 4351 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 4352 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
4353 | return err; |
4354 | } | |
4355 | ||
617ba13b MC |
4356 | EXT4_SB(sb)->s_journal = journal; |
4357 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4358 | |
c41303ce | 4359 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
4360 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
4361 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
4362 | |
4363 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 4364 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
4365 | } |
4366 | ||
4367 | return 0; | |
4368 | } | |
4369 | ||
e2d67052 | 4370 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 4371 | { |
e2d67052 | 4372 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 4373 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 4374 | int error = 0; |
ac27a0ec | 4375 | |
7c2e7087 | 4376 | if (!sbh || block_device_ejected(sb)) |
c4be0c1d | 4377 | return error; |
914258bf TT |
4378 | if (buffer_write_io_error(sbh)) { |
4379 | /* | |
4380 | * Oh, dear. A previous attempt to write the | |
4381 | * superblock failed. This could happen because the | |
4382 | * USB device was yanked out. Or it could happen to | |
4383 | * be a transient write error and maybe the block will | |
4384 | * be remapped. Nothing we can do but to retry the | |
4385 | * write and hope for the best. | |
4386 | */ | |
b31e1552 ES |
4387 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
4388 | "superblock detected"); | |
914258bf TT |
4389 | clear_buffer_write_io_error(sbh); |
4390 | set_buffer_uptodate(sbh); | |
4391 | } | |
71290b36 TT |
4392 | /* |
4393 | * If the file system is mounted read-only, don't update the | |
4394 | * superblock write time. This avoids updating the superblock | |
4395 | * write time when we are mounting the root file system | |
4396 | * read/only but we need to replay the journal; at that point, | |
4397 | * for people who are east of GMT and who make their clock | |
4398 | * tick in localtime for Windows bug-for-bug compatibility, | |
4399 | * the clock is set in the future, and this will cause e2fsck | |
4400 | * to complain and force a full file system check. | |
4401 | */ | |
4402 | if (!(sb->s_flags & MS_RDONLY)) | |
4403 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4404 | if (sb->s_bdev->bd_part) |
4405 | es->s_kbytes_written = | |
4406 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4407 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4408 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4409 | else |
4410 | es->s_kbytes_written = | |
4411 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
57042651 TT |
4412 | ext4_free_blocks_count_set(es, |
4413 | EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( | |
4414 | &EXT4_SB(sb)->s_freeclusters_counter))); | |
ce7e010a TT |
4415 | es->s_free_inodes_count = |
4416 | cpu_to_le32(percpu_counter_sum_positive( | |
4417 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
ac27a0ec | 4418 | BUFFER_TRACE(sbh, "marking dirty"); |
06db49e6 | 4419 | ext4_superblock_csum_set(sb); |
ac27a0ec | 4420 | mark_buffer_dirty(sbh); |
914258bf | 4421 | if (sync) { |
c4be0c1d TS |
4422 | error = sync_dirty_buffer(sbh); |
4423 | if (error) | |
4424 | return error; | |
4425 | ||
4426 | error = buffer_write_io_error(sbh); | |
4427 | if (error) { | |
b31e1552 ES |
4428 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4429 | "superblock"); | |
914258bf TT |
4430 | clear_buffer_write_io_error(sbh); |
4431 | set_buffer_uptodate(sbh); | |
4432 | } | |
4433 | } | |
c4be0c1d | 4434 | return error; |
ac27a0ec DK |
4435 | } |
4436 | ||
ac27a0ec DK |
4437 | /* |
4438 | * Have we just finished recovery? If so, and if we are mounting (or | |
4439 | * remounting) the filesystem readonly, then we will end up with a | |
4440 | * consistent fs on disk. Record that fact. | |
4441 | */ | |
2b2d6d01 TT |
4442 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4443 | struct ext4_super_block *es) | |
ac27a0ec | 4444 | { |
617ba13b | 4445 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4446 | |
0390131b FM |
4447 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4448 | BUG_ON(journal != NULL); | |
4449 | return; | |
4450 | } | |
dab291af | 4451 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4452 | if (jbd2_journal_flush(journal) < 0) |
4453 | goto out; | |
4454 | ||
617ba13b | 4455 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4456 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4457 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4458 | ext4_commit_super(sb, 1); |
ac27a0ec | 4459 | } |
7ffe1ea8 HK |
4460 | |
4461 | out: | |
dab291af | 4462 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4463 | } |
4464 | ||
4465 | /* | |
4466 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4467 | * has recorded an error from a previous lifetime, move that error to the | |
4468 | * main filesystem now. | |
4469 | */ | |
2b2d6d01 TT |
4470 | static void ext4_clear_journal_err(struct super_block *sb, |
4471 | struct ext4_super_block *es) | |
ac27a0ec DK |
4472 | { |
4473 | journal_t *journal; | |
4474 | int j_errno; | |
4475 | const char *errstr; | |
4476 | ||
0390131b FM |
4477 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4478 | ||
617ba13b | 4479 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4480 | |
4481 | /* | |
4482 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4483 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4484 | */ |
4485 | ||
dab291af | 4486 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4487 | if (j_errno) { |
4488 | char nbuf[16]; | |
4489 | ||
617ba13b | 4490 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4491 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4492 | "from previous mount: %s", errstr); |
12062ddd | 4493 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4494 | |
617ba13b MC |
4495 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4496 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4497 | ext4_commit_super(sb, 1); |
ac27a0ec | 4498 | |
dab291af | 4499 | jbd2_journal_clear_err(journal); |
d796c52e | 4500 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec DK |
4501 | } |
4502 | } | |
4503 | ||
4504 | /* | |
4505 | * Force the running and committing transactions to commit, | |
4506 | * and wait on the commit. | |
4507 | */ | |
617ba13b | 4508 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4509 | { |
4510 | journal_t *journal; | |
ac27a0ec DK |
4511 | |
4512 | if (sb->s_flags & MS_RDONLY) | |
4513 | return 0; | |
4514 | ||
617ba13b | 4515 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 4516 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
4517 | } |
4518 | ||
617ba13b | 4519 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4520 | { |
14ce0cb4 | 4521 | int ret = 0; |
9eddacf9 | 4522 | tid_t target; |
8d5d02e6 | 4523 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4524 | |
9bffad1e | 4525 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 | 4526 | flush_workqueue(sbi->dio_unwritten_wq); |
a1177825 JK |
4527 | /* |
4528 | * Writeback quota in non-journalled quota case - journalled quota has | |
4529 | * no dirty dquots | |
4530 | */ | |
4531 | dquot_writeback_dquots(sb, -1); | |
8d5d02e6 | 4532 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { |
9ca92389 | 4533 | if (wait) |
8d5d02e6 | 4534 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4535 | } |
14ce0cb4 | 4536 | return ret; |
ac27a0ec DK |
4537 | } |
4538 | ||
4539 | /* | |
4540 | * LVM calls this function before a (read-only) snapshot is created. This | |
4541 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
4542 | * |
4543 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
4544 | * state independently. It relies on upper layer to stop all data & metadata |
4545 | * modifications. | |
ac27a0ec | 4546 | */ |
c4be0c1d | 4547 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4548 | { |
c4be0c1d TS |
4549 | int error = 0; |
4550 | journal_t *journal; | |
ac27a0ec | 4551 | |
9ca92389 TT |
4552 | if (sb->s_flags & MS_RDONLY) |
4553 | return 0; | |
ac27a0ec | 4554 | |
9ca92389 | 4555 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4556 | |
9ca92389 TT |
4557 | /* Now we set up the journal barrier. */ |
4558 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4559 | |
9ca92389 TT |
4560 | /* |
4561 | * Don't clear the needs_recovery flag if we failed to flush | |
4562 | * the journal. | |
4563 | */ | |
4564 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4565 | if (error < 0) |
4566 | goto out; | |
9ca92389 TT |
4567 | |
4568 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4569 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4570 | error = ext4_commit_super(sb, 1); | |
6b0310fb | 4571 | out: |
8e8ad8a5 | 4572 | /* we rely on upper layer to stop further updates */ |
6b0310fb ES |
4573 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
4574 | return error; | |
ac27a0ec DK |
4575 | } |
4576 | ||
4577 | /* | |
4578 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4579 | * flag here, even though the filesystem is not technically dirty yet. | |
4580 | */ | |
c4be0c1d | 4581 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4582 | { |
9ca92389 TT |
4583 | if (sb->s_flags & MS_RDONLY) |
4584 | return 0; | |
4585 | ||
9ca92389 TT |
4586 | /* Reset the needs_recovery flag before the fs is unlocked. */ |
4587 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4588 | ext4_commit_super(sb, 1); | |
c4be0c1d | 4589 | return 0; |
ac27a0ec DK |
4590 | } |
4591 | ||
673c6100 TT |
4592 | /* |
4593 | * Structure to save mount options for ext4_remount's benefit | |
4594 | */ | |
4595 | struct ext4_mount_options { | |
4596 | unsigned long s_mount_opt; | |
a2595b8a | 4597 | unsigned long s_mount_opt2; |
08cefc7a EB |
4598 | kuid_t s_resuid; |
4599 | kgid_t s_resgid; | |
673c6100 TT |
4600 | unsigned long s_commit_interval; |
4601 | u32 s_min_batch_time, s_max_batch_time; | |
4602 | #ifdef CONFIG_QUOTA | |
4603 | int s_jquota_fmt; | |
4604 | char *s_qf_names[MAXQUOTAS]; | |
4605 | #endif | |
4606 | }; | |
4607 | ||
2b2d6d01 | 4608 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4609 | { |
2b2d6d01 | 4610 | struct ext4_super_block *es; |
617ba13b | 4611 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4612 | unsigned long old_sb_flags; |
617ba13b | 4613 | struct ext4_mount_options old_opts; |
c79d967d | 4614 | int enable_quota = 0; |
8a266467 | 4615 | ext4_group_t g; |
b3881f74 | 4616 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
c5e06d10 | 4617 | int err = 0; |
ac27a0ec | 4618 | #ifdef CONFIG_QUOTA |
03dafb5f | 4619 | int i, j; |
ac27a0ec | 4620 | #endif |
d4c402d9 | 4621 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4622 | |
4623 | /* Store the original options */ | |
4624 | old_sb_flags = sb->s_flags; | |
4625 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4626 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4627 | old_opts.s_resuid = sbi->s_resuid; |
4628 | old_opts.s_resgid = sbi->s_resgid; | |
4629 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4630 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4631 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4632 | #ifdef CONFIG_QUOTA |
4633 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4634 | for (i = 0; i < MAXQUOTAS; i++) | |
03dafb5f CG |
4635 | if (sbi->s_qf_names[i]) { |
4636 | old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], | |
4637 | GFP_KERNEL); | |
4638 | if (!old_opts.s_qf_names[i]) { | |
4639 | for (j = 0; j < i; j++) | |
4640 | kfree(old_opts.s_qf_names[j]); | |
3e36a163 | 4641 | kfree(orig_data); |
03dafb5f CG |
4642 | return -ENOMEM; |
4643 | } | |
4644 | } else | |
4645 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 4646 | #endif |
b3881f74 TT |
4647 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4648 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4649 | |
4650 | /* | |
4651 | * Allow the "check" option to be passed as a remount option. | |
4652 | */ | |
661aa520 | 4653 | if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { |
ac27a0ec DK |
4654 | err = -EINVAL; |
4655 | goto restore_opts; | |
4656 | } | |
4657 | ||
4ab2f15b | 4658 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4659 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4660 | |
4661 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4662 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4663 | |
4664 | es = sbi->s_es; | |
4665 | ||
b3881f74 | 4666 | if (sbi->s_journal) { |
0390131b | 4667 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4668 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4669 | } | |
ac27a0ec | 4670 | |
661aa520 | 4671 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
4ab2f15b | 4672 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4673 | err = -EROFS; |
4674 | goto restore_opts; | |
4675 | } | |
4676 | ||
4677 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4678 | err = dquot_suspend(sb, -1); |
4679 | if (err < 0) | |
c79d967d | 4680 | goto restore_opts; |
c79d967d | 4681 | |
ac27a0ec DK |
4682 | /* |
4683 | * First of all, the unconditional stuff we have to do | |
4684 | * to disable replay of the journal when we next remount | |
4685 | */ | |
4686 | sb->s_flags |= MS_RDONLY; | |
4687 | ||
4688 | /* | |
4689 | * OK, test if we are remounting a valid rw partition | |
4690 | * readonly, and if so set the rdonly flag and then | |
4691 | * mark the partition as valid again. | |
4692 | */ | |
617ba13b MC |
4693 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4694 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4695 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4696 | ||
a63c9eb2 | 4697 | if (sbi->s_journal) |
0390131b | 4698 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4699 | } else { |
a13fb1a4 ES |
4700 | /* Make sure we can mount this feature set readwrite */ |
4701 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4702 | err = -EROFS; |
4703 | goto restore_opts; | |
4704 | } | |
8a266467 TT |
4705 | /* |
4706 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4707 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4708 | */ |
4709 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4710 | struct ext4_group_desc *gdp = | |
4711 | ext4_get_group_desc(sb, g, NULL); | |
4712 | ||
feb0ab32 | 4713 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
4714 | ext4_msg(sb, KERN_ERR, |
4715 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4716 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4717 | le16_to_cpu(gdp->bg_checksum)); | |
4718 | err = -EINVAL; | |
4719 | goto restore_opts; | |
4720 | } | |
4721 | } | |
4722 | ||
ead6596b ES |
4723 | /* |
4724 | * If we have an unprocessed orphan list hanging | |
4725 | * around from a previously readonly bdev mount, | |
4726 | * require a full umount/remount for now. | |
4727 | */ | |
4728 | if (es->s_last_orphan) { | |
b31e1552 | 4729 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4730 | "remount RDWR because of unprocessed " |
4731 | "orphan inode list. Please " | |
b31e1552 | 4732 | "umount/remount instead"); |
ead6596b ES |
4733 | err = -EINVAL; |
4734 | goto restore_opts; | |
4735 | } | |
4736 | ||
ac27a0ec DK |
4737 | /* |
4738 | * Mounting a RDONLY partition read-write, so reread | |
4739 | * and store the current valid flag. (It may have | |
4740 | * been changed by e2fsck since we originally mounted | |
4741 | * the partition.) | |
4742 | */ | |
0390131b FM |
4743 | if (sbi->s_journal) |
4744 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4745 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
2b2d6d01 | 4746 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4747 | sb->s_flags &= ~MS_RDONLY; |
c5e06d10 JL |
4748 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, |
4749 | EXT4_FEATURE_INCOMPAT_MMP)) | |
4750 | if (ext4_multi_mount_protect(sb, | |
4751 | le64_to_cpu(es->s_mmp_block))) { | |
4752 | err = -EROFS; | |
4753 | goto restore_opts; | |
4754 | } | |
c79d967d | 4755 | enable_quota = 1; |
ac27a0ec DK |
4756 | } |
4757 | } | |
bfff6873 LC |
4758 | |
4759 | /* | |
4760 | * Reinitialize lazy itable initialization thread based on | |
4761 | * current settings | |
4762 | */ | |
4763 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4764 | ext4_unregister_li_request(sb); | |
4765 | else { | |
4766 | ext4_group_t first_not_zeroed; | |
4767 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4768 | ext4_register_li_request(sb, first_not_zeroed); | |
4769 | } | |
4770 | ||
6fd058f7 | 4771 | ext4_setup_system_zone(sb); |
d096ad0f | 4772 | if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) |
e2d67052 | 4773 | ext4_commit_super(sb, 1); |
0390131b | 4774 | |
ac27a0ec DK |
4775 | #ifdef CONFIG_QUOTA |
4776 | /* Release old quota file names */ | |
4777 | for (i = 0; i < MAXQUOTAS; i++) | |
03dafb5f | 4778 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
4779 | if (enable_quota) { |
4780 | if (sb_any_quota_suspended(sb)) | |
4781 | dquot_resume(sb, -1); | |
4782 | else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
4783 | EXT4_FEATURE_RO_COMPAT_QUOTA)) { | |
4784 | err = ext4_enable_quotas(sb); | |
07724f98 | 4785 | if (err) |
7c319d32 | 4786 | goto restore_opts; |
7c319d32 AK |
4787 | } |
4788 | } | |
ac27a0ec | 4789 | #endif |
d4c402d9 CW |
4790 | |
4791 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4792 | kfree(orig_data); | |
ac27a0ec | 4793 | return 0; |
0b8e58a1 | 4794 | |
ac27a0ec DK |
4795 | restore_opts: |
4796 | sb->s_flags = old_sb_flags; | |
4797 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4798 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4799 | sbi->s_resuid = old_opts.s_resuid; |
4800 | sbi->s_resgid = old_opts.s_resgid; | |
4801 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4802 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4803 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4804 | #ifdef CONFIG_QUOTA |
4805 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4806 | for (i = 0; i < MAXQUOTAS; i++) { | |
03dafb5f | 4807 | kfree(sbi->s_qf_names[i]); |
ac27a0ec DK |
4808 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; |
4809 | } | |
4810 | #endif | |
d4c402d9 | 4811 | kfree(orig_data); |
ac27a0ec DK |
4812 | return err; |
4813 | } | |
4814 | ||
2b2d6d01 | 4815 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4816 | { |
4817 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4818 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4819 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 4820 | ext4_fsblk_t overhead = 0, resv_blocks; |
960cc398 | 4821 | u64 fsid; |
d02a9391 | 4822 | s64 bfree; |
27dd4385 | 4823 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 4824 | |
952fc18e TT |
4825 | if (!test_opt(sb, MINIX_DF)) |
4826 | overhead = sbi->s_overhead; | |
ac27a0ec | 4827 | |
617ba13b | 4828 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4829 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 4830 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
4831 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
4832 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 4833 | /* prevent underflow in case that few free space is available */ |
57042651 | 4834 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
4835 | buf->f_bavail = buf->f_bfree - |
4836 | (ext4_r_blocks_count(es) + resv_blocks); | |
4837 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
4838 | buf->f_bavail = 0; |
4839 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4840 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4841 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4842 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4843 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4844 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4845 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4846 | |
ac27a0ec DK |
4847 | return 0; |
4848 | } | |
4849 | ||
0b8e58a1 AD |
4850 | /* Helper function for writing quotas on sync - we need to start transaction |
4851 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4852 | * Process 1 Process 2 |
617ba13b | 4853 | * ext4_create() quota_sync() |
a269eb18 | 4854 | * jbd2_journal_start() write_dquot() |
871a2931 | 4855 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4856 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4857 | * |
4858 | */ | |
4859 | ||
4860 | #ifdef CONFIG_QUOTA | |
4861 | ||
4862 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4863 | { | |
4c376dca | 4864 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
4865 | } |
4866 | ||
617ba13b | 4867 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4868 | { |
4869 | int ret, err; | |
4870 | handle_t *handle; | |
4871 | struct inode *inode; | |
4872 | ||
4873 | inode = dquot_to_inode(dquot); | |
9924a92a | 4874 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 4875 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4876 | if (IS_ERR(handle)) |
4877 | return PTR_ERR(handle); | |
4878 | ret = dquot_commit(dquot); | |
617ba13b | 4879 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4880 | if (!ret) |
4881 | ret = err; | |
4882 | return ret; | |
4883 | } | |
4884 | ||
617ba13b | 4885 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4886 | { |
4887 | int ret, err; | |
4888 | handle_t *handle; | |
4889 | ||
9924a92a | 4890 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4891 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4892 | if (IS_ERR(handle)) |
4893 | return PTR_ERR(handle); | |
4894 | ret = dquot_acquire(dquot); | |
617ba13b | 4895 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4896 | if (!ret) |
4897 | ret = err; | |
4898 | return ret; | |
4899 | } | |
4900 | ||
617ba13b | 4901 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4902 | { |
4903 | int ret, err; | |
4904 | handle_t *handle; | |
4905 | ||
9924a92a | 4906 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 4907 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4908 | if (IS_ERR(handle)) { |
4909 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4910 | dquot_release(dquot); | |
ac27a0ec | 4911 | return PTR_ERR(handle); |
9c3013e9 | 4912 | } |
ac27a0ec | 4913 | ret = dquot_release(dquot); |
617ba13b | 4914 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4915 | if (!ret) |
4916 | ret = err; | |
4917 | return ret; | |
4918 | } | |
4919 | ||
617ba13b | 4920 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4921 | { |
262b4662 JK |
4922 | struct super_block *sb = dquot->dq_sb; |
4923 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4924 | ||
2c8be6b2 | 4925 | /* Are we journaling quotas? */ |
262b4662 JK |
4926 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || |
4927 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4928 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4929 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4930 | } else { |
4931 | return dquot_mark_dquot_dirty(dquot); | |
4932 | } | |
4933 | } | |
4934 | ||
617ba13b | 4935 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4936 | { |
4937 | int ret, err; | |
4938 | handle_t *handle; | |
4939 | ||
4940 | /* Data block + inode block */ | |
9924a92a | 4941 | handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
4942 | if (IS_ERR(handle)) |
4943 | return PTR_ERR(handle); | |
4944 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4945 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4946 | if (!ret) |
4947 | ret = err; | |
4948 | return ret; | |
4949 | } | |
4950 | ||
4951 | /* | |
4952 | * Turn on quotas during mount time - we need to find | |
4953 | * the quota file and such... | |
4954 | */ | |
617ba13b | 4955 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4956 | { |
287a8095 CH |
4957 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4958 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4959 | } |
4960 | ||
4961 | /* | |
4962 | * Standard function to be called on quota_on | |
4963 | */ | |
617ba13b | 4964 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4965 | struct path *path) |
ac27a0ec DK |
4966 | { |
4967 | int err; | |
ac27a0ec DK |
4968 | |
4969 | if (!test_opt(sb, QUOTA)) | |
4970 | return -EINVAL; | |
0623543b | 4971 | |
ac27a0ec | 4972 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 4973 | if (path->dentry->d_sb != sb) |
ac27a0ec | 4974 | return -EXDEV; |
0623543b JK |
4975 | /* Journaling quota? */ |
4976 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4977 | /* Quotafile not in fs root? */ |
f00c9e44 | 4978 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4979 | ext4_msg(sb, KERN_WARNING, |
4980 | "Quota file not on filesystem root. " | |
4981 | "Journaled quota will not work"); | |
2b2d6d01 | 4982 | } |
0623543b JK |
4983 | |
4984 | /* | |
4985 | * When we journal data on quota file, we have to flush journal to see | |
4986 | * all updates to the file when we bypass pagecache... | |
4987 | */ | |
0390131b | 4988 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4989 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4990 | /* |
4991 | * We don't need to lock updates but journal_flush() could | |
4992 | * otherwise be livelocked... | |
4993 | */ | |
4994 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4995 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4996 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4997 | if (err) |
7ffe1ea8 | 4998 | return err; |
0623543b JK |
4999 | } |
5000 | ||
f00c9e44 | 5001 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
5002 | } |
5003 | ||
7c319d32 AK |
5004 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
5005 | unsigned int flags) | |
5006 | { | |
5007 | int err; | |
5008 | struct inode *qf_inode; | |
5009 | unsigned long qf_inums[MAXQUOTAS] = { | |
5010 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
5011 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5012 | }; | |
5013 | ||
5014 | BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); | |
5015 | ||
5016 | if (!qf_inums[type]) | |
5017 | return -EPERM; | |
5018 | ||
5019 | qf_inode = ext4_iget(sb, qf_inums[type]); | |
5020 | if (IS_ERR(qf_inode)) { | |
5021 | ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); | |
5022 | return PTR_ERR(qf_inode); | |
5023 | } | |
5024 | ||
bcb13850 JK |
5025 | /* Don't account quota for quota files to avoid recursion */ |
5026 | qf_inode->i_flags |= S_NOQUOTA; | |
7c319d32 AK |
5027 | err = dquot_enable(qf_inode, type, format_id, flags); |
5028 | iput(qf_inode); | |
5029 | ||
5030 | return err; | |
5031 | } | |
5032 | ||
5033 | /* Enable usage tracking for all quota types. */ | |
5034 | static int ext4_enable_quotas(struct super_block *sb) | |
5035 | { | |
5036 | int type, err = 0; | |
5037 | unsigned long qf_inums[MAXQUOTAS] = { | |
5038 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), | |
5039 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) | |
5040 | }; | |
5041 | ||
5042 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
5043 | for (type = 0; type < MAXQUOTAS; type++) { | |
5044 | if (qf_inums[type]) { | |
5045 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
5046 | DQUOT_USAGE_ENABLED); | |
5047 | if (err) { | |
5048 | ext4_warning(sb, | |
72ba7450 TT |
5049 | "Failed to enable quota tracking " |
5050 | "(type=%d, err=%d). Please run " | |
5051 | "e2fsck to fix.", type, err); | |
7c319d32 AK |
5052 | return err; |
5053 | } | |
5054 | } | |
5055 | } | |
5056 | return 0; | |
5057 | } | |
5058 | ||
5059 | /* | |
5060 | * quota_on function that is used when QUOTA feature is set. | |
5061 | */ | |
5062 | static int ext4_quota_on_sysfile(struct super_block *sb, int type, | |
5063 | int format_id) | |
5064 | { | |
5065 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5066 | return -EINVAL; | |
5067 | ||
5068 | /* | |
5069 | * USAGE was enabled at mount time. Only need to enable LIMITS now. | |
5070 | */ | |
5071 | return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); | |
5072 | } | |
5073 | ||
ca0e05e4 DM |
5074 | static int ext4_quota_off(struct super_block *sb, int type) |
5075 | { | |
21f97697 JK |
5076 | struct inode *inode = sb_dqopt(sb)->files[type]; |
5077 | handle_t *handle; | |
5078 | ||
87009d86 DM |
5079 | /* Force all delayed allocation blocks to be allocated. |
5080 | * Caller already holds s_umount sem */ | |
5081 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 5082 | sync_filesystem(sb); |
ca0e05e4 | 5083 | |
0b268590 AG |
5084 | if (!inode) |
5085 | goto out; | |
5086 | ||
21f97697 JK |
5087 | /* Update modification times of quota files when userspace can |
5088 | * start looking at them */ | |
9924a92a | 5089 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
21f97697 JK |
5090 | if (IS_ERR(handle)) |
5091 | goto out; | |
5092 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
5093 | ext4_mark_inode_dirty(handle, inode); | |
5094 | ext4_journal_stop(handle); | |
5095 | ||
5096 | out: | |
ca0e05e4 DM |
5097 | return dquot_quota_off(sb, type); |
5098 | } | |
5099 | ||
7c319d32 AK |
5100 | /* |
5101 | * quota_off function that is used when QUOTA feature is set. | |
5102 | */ | |
5103 | static int ext4_quota_off_sysfile(struct super_block *sb, int type) | |
5104 | { | |
5105 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) | |
5106 | return -EINVAL; | |
5107 | ||
5108 | /* Disable only the limits. */ | |
5109 | return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); | |
5110 | } | |
5111 | ||
ac27a0ec DK |
5112 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
5113 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 5114 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 5115 | * we don't have to be afraid of races */ |
617ba13b | 5116 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
5117 | size_t len, loff_t off) |
5118 | { | |
5119 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5120 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5121 | int err = 0; |
5122 | int offset = off & (sb->s_blocksize - 1); | |
5123 | int tocopy; | |
5124 | size_t toread; | |
5125 | struct buffer_head *bh; | |
5126 | loff_t i_size = i_size_read(inode); | |
5127 | ||
5128 | if (off > i_size) | |
5129 | return 0; | |
5130 | if (off+len > i_size) | |
5131 | len = i_size-off; | |
5132 | toread = len; | |
5133 | while (toread > 0) { | |
5134 | tocopy = sb->s_blocksize - offset < toread ? | |
5135 | sb->s_blocksize - offset : toread; | |
617ba13b | 5136 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
5137 | if (err) |
5138 | return err; | |
5139 | if (!bh) /* A hole? */ | |
5140 | memset(data, 0, tocopy); | |
5141 | else | |
5142 | memcpy(data, bh->b_data+offset, tocopy); | |
5143 | brelse(bh); | |
5144 | offset = 0; | |
5145 | toread -= tocopy; | |
5146 | data += tocopy; | |
5147 | blk++; | |
5148 | } | |
5149 | return len; | |
5150 | } | |
5151 | ||
5152 | /* Write to quotafile (we know the transaction is already started and has | |
5153 | * enough credits) */ | |
617ba13b | 5154 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
5155 | const char *data, size_t len, loff_t off) |
5156 | { | |
5157 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 5158 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
5159 | int err = 0; |
5160 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
5161 | struct buffer_head *bh; |
5162 | handle_t *handle = journal_current_handle(); | |
5163 | ||
0390131b | 5164 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
5165 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
5166 | " cancelled because transaction is not started", | |
9c3013e9 JK |
5167 | (unsigned long long)off, (unsigned long long)len); |
5168 | return -EIO; | |
5169 | } | |
67eeb568 DM |
5170 | /* |
5171 | * Since we account only one data block in transaction credits, | |
5172 | * then it is impossible to cross a block boundary. | |
5173 | */ | |
5174 | if (sb->s_blocksize - offset < len) { | |
5175 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
5176 | " cancelled because not block aligned", | |
5177 | (unsigned long long)off, (unsigned long long)len); | |
5178 | return -EIO; | |
5179 | } | |
5180 | ||
67eeb568 DM |
5181 | bh = ext4_bread(handle, inode, blk, 1, &err); |
5182 | if (!bh) | |
5183 | goto out; | |
62d2b5f2 JK |
5184 | err = ext4_journal_get_write_access(handle, bh); |
5185 | if (err) { | |
5186 | brelse(bh); | |
5187 | goto out; | |
ac27a0ec | 5188 | } |
67eeb568 DM |
5189 | lock_buffer(bh); |
5190 | memcpy(bh->b_data+offset, data, len); | |
5191 | flush_dcache_page(bh->b_page); | |
5192 | unlock_buffer(bh); | |
62d2b5f2 | 5193 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 5194 | brelse(bh); |
ac27a0ec | 5195 | out: |
0b7f7cef | 5196 | if (err) |
ac27a0ec | 5197 | return err; |
67eeb568 DM |
5198 | if (inode->i_size < off + len) { |
5199 | i_size_write(inode, off + len); | |
617ba13b | 5200 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 5201 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 5202 | } |
67eeb568 | 5203 | return len; |
ac27a0ec DK |
5204 | } |
5205 | ||
5206 | #endif | |
5207 | ||
152a0836 AV |
5208 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
5209 | const char *dev_name, void *data) | |
ac27a0ec | 5210 | { |
152a0836 | 5211 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
5212 | } |
5213 | ||
37f328eb | 5214 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5215 | static inline void register_as_ext2(void) |
5216 | { | |
5217 | int err = register_filesystem(&ext2_fs_type); | |
5218 | if (err) | |
5219 | printk(KERN_WARNING | |
5220 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
5221 | } | |
5222 | ||
5223 | static inline void unregister_as_ext2(void) | |
5224 | { | |
5225 | unregister_filesystem(&ext2_fs_type); | |
5226 | } | |
2035e776 TT |
5227 | |
5228 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
5229 | { | |
5230 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) | |
5231 | return 0; | |
5232 | if (sb->s_flags & MS_RDONLY) | |
5233 | return 1; | |
5234 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) | |
5235 | return 0; | |
5236 | return 1; | |
5237 | } | |
24b58424 TT |
5238 | #else |
5239 | static inline void register_as_ext2(void) { } | |
5240 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 5241 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5242 | #endif |
5243 | ||
37f328eb | 5244 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
5245 | static inline void register_as_ext3(void) |
5246 | { | |
5247 | int err = register_filesystem(&ext3_fs_type); | |
5248 | if (err) | |
5249 | printk(KERN_WARNING | |
5250 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
5251 | } | |
5252 | ||
5253 | static inline void unregister_as_ext3(void) | |
5254 | { | |
5255 | unregister_filesystem(&ext3_fs_type); | |
5256 | } | |
2035e776 TT |
5257 | |
5258 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
5259 | { | |
5260 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) | |
5261 | return 0; | |
5262 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
5263 | return 0; | |
5264 | if (sb->s_flags & MS_RDONLY) | |
5265 | return 1; | |
5266 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) | |
5267 | return 0; | |
5268 | return 1; | |
5269 | } | |
24b58424 TT |
5270 | #else |
5271 | static inline void register_as_ext3(void) { } | |
5272 | static inline void unregister_as_ext3(void) { } | |
2035e776 | 5273 | static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
5274 | #endif |
5275 | ||
03010a33 TT |
5276 | static struct file_system_type ext4_fs_type = { |
5277 | .owner = THIS_MODULE, | |
5278 | .name = "ext4", | |
152a0836 | 5279 | .mount = ext4_mount, |
03010a33 TT |
5280 | .kill_sb = kill_block_super, |
5281 | .fs_flags = FS_REQUIRES_DEV, | |
5282 | }; | |
7f78e035 | 5283 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 5284 | |
8f021222 | 5285 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
5286 | { |
5287 | struct ext4_features *ef; | |
5288 | int ret = -ENOMEM; | |
5289 | ||
5290 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
5291 | if (!ef) | |
5292 | goto out; | |
5293 | ||
5294 | ef->f_kobj.kset = ext4_kset; | |
5295 | init_completion(&ef->f_kobj_unregister); | |
5296 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
5297 | "features"); | |
5298 | if (ret) { | |
5299 | kfree(ef); | |
5300 | goto out; | |
5301 | } | |
5302 | ||
5303 | ext4_feat = ef; | |
5304 | ret = 0; | |
5305 | out: | |
5306 | return ret; | |
5307 | } | |
5308 | ||
8f021222 LC |
5309 | static void ext4_exit_feat_adverts(void) |
5310 | { | |
5311 | kobject_put(&ext4_feat->f_kobj); | |
5312 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
5313 | kfree(ext4_feat); | |
5314 | } | |
5315 | ||
e9e3bcec ES |
5316 | /* Shared across all ext4 file systems */ |
5317 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
5318 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
5319 | ||
5dabfc78 | 5320 | static int __init ext4_init_fs(void) |
ac27a0ec | 5321 | { |
e9e3bcec | 5322 | int i, err; |
c9de560d | 5323 | |
07c0c5d8 AV |
5324 | ext4_li_info = NULL; |
5325 | mutex_init(&ext4_li_mtx); | |
5326 | ||
9a4c8019 | 5327 | /* Build-time check for flags consistency */ |
12e9b892 | 5328 | ext4_check_flag_values(); |
e9e3bcec ES |
5329 | |
5330 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
5331 | mutex_init(&ext4__aio_mutex[i]); | |
5332 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
5333 | } | |
5334 | ||
51865fda | 5335 | err = ext4_init_es(); |
6fd058f7 TT |
5336 | if (err) |
5337 | return err; | |
51865fda ZL |
5338 | |
5339 | err = ext4_init_pageio(); | |
5340 | if (err) | |
5341 | goto out7; | |
5342 | ||
5dabfc78 | 5343 | err = ext4_init_system_zone(); |
bd2d0210 | 5344 | if (err) |
d44651d0 | 5345 | goto out6; |
3197ebdb | 5346 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
0e376b1e TT |
5347 | if (!ext4_kset) { |
5348 | err = -ENOMEM; | |
dd68314c | 5349 | goto out5; |
0e376b1e | 5350 | } |
d44651d0 | 5351 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
5352 | |
5353 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
5354 | if (err) |
5355 | goto out4; | |
857ac889 | 5356 | |
5dabfc78 | 5357 | err = ext4_init_mballoc(); |
ac27a0ec | 5358 | if (err) |
6fd058f7 | 5359 | goto out3; |
c9de560d | 5360 | |
5dabfc78 | 5361 | err = ext4_init_xattr(); |
c9de560d AT |
5362 | if (err) |
5363 | goto out2; | |
ac27a0ec DK |
5364 | err = init_inodecache(); |
5365 | if (err) | |
5366 | goto out1; | |
24b58424 | 5367 | register_as_ext3(); |
2035e776 | 5368 | register_as_ext2(); |
03010a33 | 5369 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
5370 | if (err) |
5371 | goto out; | |
bfff6873 | 5372 | |
ac27a0ec DK |
5373 | return 0; |
5374 | out: | |
24b58424 TT |
5375 | unregister_as_ext2(); |
5376 | unregister_as_ext3(); | |
ac27a0ec DK |
5377 | destroy_inodecache(); |
5378 | out1: | |
5dabfc78 | 5379 | ext4_exit_xattr(); |
c9de560d | 5380 | out2: |
5dabfc78 | 5381 | ext4_exit_mballoc(); |
6fd058f7 | 5382 | out3: |
8f021222 | 5383 | ext4_exit_feat_adverts(); |
dd68314c | 5384 | out4: |
d44651d0 FJ |
5385 | if (ext4_proc_root) |
5386 | remove_proc_entry("fs/ext4", NULL); | |
6fd058f7 | 5387 | kset_unregister(ext4_kset); |
d44651d0 | 5388 | out5: |
5dabfc78 | 5389 | ext4_exit_system_zone(); |
d44651d0 | 5390 | out6: |
5dabfc78 | 5391 | ext4_exit_pageio(); |
51865fda ZL |
5392 | out7: |
5393 | ext4_exit_es(); | |
5394 | ||
ac27a0ec DK |
5395 | return err; |
5396 | } | |
5397 | ||
5dabfc78 | 5398 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 5399 | { |
bfff6873 | 5400 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
5401 | unregister_as_ext2(); |
5402 | unregister_as_ext3(); | |
03010a33 | 5403 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 5404 | destroy_inodecache(); |
5dabfc78 TT |
5405 | ext4_exit_xattr(); |
5406 | ext4_exit_mballoc(); | |
8f021222 | 5407 | ext4_exit_feat_adverts(); |
9f6200bb | 5408 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 5409 | kset_unregister(ext4_kset); |
5dabfc78 TT |
5410 | ext4_exit_system_zone(); |
5411 | ext4_exit_pageio(); | |
ac27a0ec DK |
5412 | } |
5413 | ||
5414 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 5415 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 5416 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
5417 | module_init(ext4_init_fs) |
5418 | module_exit(ext4_exit_fs) |