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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> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 CH |
46 | #include "ext4.h" |
47 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
48 | #include "xattr.h" |
49 | #include "acl.h" | |
3661d286 | 50 | #include "mballoc.h" |
ac27a0ec | 51 | |
9bffad1e TT |
52 | #define CREATE_TRACE_POINTS |
53 | #include <trace/events/ext4.h> | |
54 | ||
1f109d5a | 55 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 56 | static struct kset *ext4_kset; |
bfff6873 LC |
57 | struct ext4_lazy_init *ext4_li_info; |
58 | struct mutex ext4_li_mtx; | |
857ac889 | 59 | struct ext4_features *ext4_feat; |
9f6200bb | 60 | |
617ba13b | 61 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 62 | unsigned long journal_devnum); |
e2d67052 | 63 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
64 | static void ext4_mark_recovery_complete(struct super_block *sb, |
65 | struct ext4_super_block *es); | |
66 | static void ext4_clear_journal_err(struct super_block *sb, | |
67 | struct ext4_super_block *es); | |
617ba13b | 68 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 69 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 70 | char nbuf[16]); |
2b2d6d01 TT |
71 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
72 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 73 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 74 | static void ext4_write_super(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); | |
bfff6873 LC |
78 | static void ext4_destroy_lazyinit_thread(void); |
79 | static void ext4_unregister_li_request(struct super_block *sb); | |
ac27a0ec | 80 | |
ba69f9ab JK |
81 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
82 | static struct file_system_type ext3_fs_type = { | |
83 | .owner = THIS_MODULE, | |
84 | .name = "ext3", | |
152a0836 | 85 | .mount = ext4_mount, |
ba69f9ab JK |
86 | .kill_sb = kill_block_super, |
87 | .fs_flags = FS_REQUIRES_DEV, | |
88 | }; | |
89 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
90 | #else | |
91 | #define IS_EXT3_SB(sb) (0) | |
92 | #endif | |
bd81d8ee | 93 | |
8fadc143 AR |
94 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
95 | struct ext4_group_desc *bg) | |
bd81d8ee | 96 | { |
3a14589c | 97 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 98 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 99 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
100 | } |
101 | ||
8fadc143 AR |
102 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
103 | struct ext4_group_desc *bg) | |
bd81d8ee | 104 | { |
5272f837 | 105 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 106 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 107 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
108 | } |
109 | ||
8fadc143 AR |
110 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
111 | struct ext4_group_desc *bg) | |
bd81d8ee | 112 | { |
5272f837 | 113 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 114 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 115 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
116 | } |
117 | ||
560671a0 AK |
118 | __u32 ext4_free_blks_count(struct super_block *sb, |
119 | struct ext4_group_desc *bg) | |
120 | { | |
121 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
122 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 123 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
124 | } |
125 | ||
126 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
127 | struct ext4_group_desc *bg) | |
128 | { | |
129 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
130 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 131 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
132 | } |
133 | ||
134 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
135 | struct ext4_group_desc *bg) | |
136 | { | |
137 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
138 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 139 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
140 | } |
141 | ||
142 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
143 | struct ext4_group_desc *bg) | |
144 | { | |
145 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
146 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 147 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
148 | } |
149 | ||
8fadc143 AR |
150 | void ext4_block_bitmap_set(struct super_block *sb, |
151 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 152 | { |
3a14589c | 153 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
154 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
155 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
156 | } |
157 | ||
8fadc143 AR |
158 | void ext4_inode_bitmap_set(struct super_block *sb, |
159 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 160 | { |
5272f837 | 161 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
162 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
163 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
164 | } |
165 | ||
8fadc143 AR |
166 | void ext4_inode_table_set(struct super_block *sb, |
167 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 168 | { |
5272f837 | 169 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
170 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
171 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
172 | } |
173 | ||
560671a0 AK |
174 | void ext4_free_blks_set(struct super_block *sb, |
175 | struct ext4_group_desc *bg, __u32 count) | |
176 | { | |
177 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
178 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
179 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
180 | } | |
181 | ||
182 | void ext4_free_inodes_set(struct super_block *sb, | |
183 | struct ext4_group_desc *bg, __u32 count) | |
184 | { | |
185 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
186 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
187 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
188 | } | |
189 | ||
190 | void ext4_used_dirs_set(struct super_block *sb, | |
191 | struct ext4_group_desc *bg, __u32 count) | |
192 | { | |
193 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
194 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
195 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
196 | } | |
197 | ||
198 | void ext4_itable_unused_set(struct super_block *sb, | |
199 | struct ext4_group_desc *bg, __u32 count) | |
200 | { | |
201 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
202 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
203 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
204 | } | |
205 | ||
d3d1faf6 CW |
206 | |
207 | /* Just increment the non-pointer handle value */ | |
208 | static handle_t *ext4_get_nojournal(void) | |
209 | { | |
210 | handle_t *handle = current->journal_info; | |
211 | unsigned long ref_cnt = (unsigned long)handle; | |
212 | ||
213 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
214 | ||
215 | ref_cnt++; | |
216 | handle = (handle_t *)ref_cnt; | |
217 | ||
218 | current->journal_info = handle; | |
219 | return handle; | |
220 | } | |
221 | ||
222 | ||
223 | /* Decrement the non-pointer handle value */ | |
224 | static void ext4_put_nojournal(handle_t *handle) | |
225 | { | |
226 | unsigned long ref_cnt = (unsigned long)handle; | |
227 | ||
228 | BUG_ON(ref_cnt == 0); | |
229 | ||
230 | ref_cnt--; | |
231 | handle = (handle_t *)ref_cnt; | |
232 | ||
233 | current->journal_info = handle; | |
234 | } | |
235 | ||
ac27a0ec | 236 | /* |
dab291af | 237 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
238 | * |
239 | * The only special thing we need to do here is to make sure that all | |
240 | * journal_end calls result in the superblock being marked dirty, so | |
241 | * that sync() will call the filesystem's write_super callback if | |
242 | * appropriate. | |
243 | */ | |
617ba13b | 244 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
245 | { |
246 | journal_t *journal; | |
247 | ||
248 | if (sb->s_flags & MS_RDONLY) | |
249 | return ERR_PTR(-EROFS); | |
250 | ||
437f88cc | 251 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
ac27a0ec DK |
252 | /* Special case here: if the journal has aborted behind our |
253 | * backs (eg. EIO in the commit thread), then we still need to | |
254 | * take the FS itself readonly cleanly. */ | |
617ba13b | 255 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
256 | if (journal) { |
257 | if (is_journal_aborted(journal)) { | |
c67d859e | 258 | ext4_abort(sb, "Detected aborted journal"); |
0390131b FM |
259 | return ERR_PTR(-EROFS); |
260 | } | |
261 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 262 | } |
d3d1faf6 | 263 | return ext4_get_nojournal(); |
ac27a0ec DK |
264 | } |
265 | ||
266 | /* | |
267 | * The only special thing we need to do here is to make sure that all | |
dab291af | 268 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
269 | * that sync() will call the filesystem's write_super callback if |
270 | * appropriate. | |
271 | */ | |
c398eda0 | 272 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
273 | { |
274 | struct super_block *sb; | |
275 | int err; | |
276 | int rc; | |
277 | ||
0390131b | 278 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 279 | ext4_put_nojournal(handle); |
0390131b FM |
280 | return 0; |
281 | } | |
ac27a0ec DK |
282 | sb = handle->h_transaction->t_journal->j_private; |
283 | err = handle->h_err; | |
dab291af | 284 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
285 | |
286 | if (!err) | |
287 | err = rc; | |
288 | if (err) | |
c398eda0 | 289 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
290 | return err; |
291 | } | |
292 | ||
90c7201b TT |
293 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
294 | const char *err_fn, struct buffer_head *bh, | |
295 | handle_t *handle, int err) | |
ac27a0ec DK |
296 | { |
297 | char nbuf[16]; | |
617ba13b | 298 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 299 | |
0390131b FM |
300 | BUG_ON(!ext4_handle_valid(handle)); |
301 | ||
ac27a0ec DK |
302 | if (bh) |
303 | BUFFER_TRACE(bh, "abort"); | |
304 | ||
305 | if (!handle->h_err) | |
306 | handle->h_err = err; | |
307 | ||
308 | if (is_handle_aborted(handle)) | |
309 | return; | |
310 | ||
90c7201b TT |
311 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
312 | caller, line, errstr, err_fn); | |
ac27a0ec | 313 | |
dab291af | 314 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
315 | } |
316 | ||
1c13d5c0 TT |
317 | static void __save_error_info(struct super_block *sb, const char *func, |
318 | unsigned int line) | |
319 | { | |
320 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
321 | ||
322 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
323 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
324 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
325 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
326 | es->s_last_error_line = cpu_to_le32(line); | |
327 | if (!es->s_first_error_time) { | |
328 | es->s_first_error_time = es->s_last_error_time; | |
329 | strncpy(es->s_first_error_func, func, | |
330 | sizeof(es->s_first_error_func)); | |
331 | es->s_first_error_line = cpu_to_le32(line); | |
332 | es->s_first_error_ino = es->s_last_error_ino; | |
333 | es->s_first_error_block = es->s_last_error_block; | |
334 | } | |
66e61a9e TT |
335 | /* |
336 | * Start the daily error reporting function if it hasn't been | |
337 | * started already | |
338 | */ | |
339 | if (!es->s_error_count) | |
340 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
341 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
342 | } | |
343 | ||
344 | static void save_error_info(struct super_block *sb, const char *func, | |
345 | unsigned int line) | |
346 | { | |
347 | __save_error_info(sb, func, line); | |
348 | ext4_commit_super(sb, 1); | |
349 | } | |
350 | ||
351 | ||
ac27a0ec DK |
352 | /* Deal with the reporting of failure conditions on a filesystem such as |
353 | * inconsistencies detected or read IO failures. | |
354 | * | |
355 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 356 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
357 | * write ordering constraints on the superblock which prevent us from |
358 | * writing it out straight away; and given that the journal is about to | |
359 | * be aborted, we can't rely on the current, or future, transactions to | |
360 | * write out the superblock safely. | |
361 | * | |
dab291af | 362 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 363 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
364 | * that error until we've noted it down and cleared it. |
365 | */ | |
366 | ||
617ba13b | 367 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 368 | { |
ac27a0ec DK |
369 | if (sb->s_flags & MS_RDONLY) |
370 | return; | |
371 | ||
2b2d6d01 | 372 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 373 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 374 | |
4ab2f15b | 375 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 376 | if (journal) |
dab291af | 377 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 378 | } |
2b2d6d01 | 379 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 380 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
381 | sb->s_flags |= MS_RDONLY; |
382 | } | |
ac27a0ec | 383 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 384 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
385 | sb->s_id); |
386 | } | |
387 | ||
12062ddd | 388 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 389 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 390 | { |
0ff2ea7d | 391 | struct va_format vaf; |
ac27a0ec DK |
392 | va_list args; |
393 | ||
394 | va_start(args, fmt); | |
0ff2ea7d JP |
395 | vaf.fmt = fmt; |
396 | vaf.va = &args; | |
397 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
398 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
399 | va_end(args); |
400 | ||
617ba13b | 401 | ext4_handle_error(sb); |
ac27a0ec DK |
402 | } |
403 | ||
c398eda0 TT |
404 | void ext4_error_inode(struct inode *inode, const char *function, |
405 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
406 | const char *fmt, ...) |
407 | { | |
408 | va_list args; | |
f7c21177 | 409 | struct va_format vaf; |
1c13d5c0 | 410 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 411 | |
1c13d5c0 TT |
412 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
413 | es->s_last_error_block = cpu_to_le64(block); | |
414 | save_error_info(inode->i_sb, function, line); | |
273df556 | 415 | va_start(args, fmt); |
f7c21177 TT |
416 | vaf.fmt = fmt; |
417 | vaf.va = &args; | |
c398eda0 TT |
418 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
419 | inode->i_sb->s_id, function, line, inode->i_ino); | |
420 | if (block) | |
f7c21177 TT |
421 | printk(KERN_CONT "block %llu: ", block); |
422 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
423 | va_end(args); |
424 | ||
425 | ext4_handle_error(inode->i_sb); | |
426 | } | |
427 | ||
c398eda0 | 428 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
429 | unsigned int line, ext4_fsblk_t block, |
430 | const char *fmt, ...) | |
273df556 FM |
431 | { |
432 | va_list args; | |
f7c21177 | 433 | struct va_format vaf; |
1c13d5c0 | 434 | struct ext4_super_block *es; |
273df556 FM |
435 | struct inode *inode = file->f_dentry->d_inode; |
436 | char pathname[80], *path; | |
437 | ||
1c13d5c0 TT |
438 | es = EXT4_SB(inode->i_sb)->s_es; |
439 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
440 | save_error_info(inode->i_sb, function, line); | |
273df556 | 441 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 442 | if (IS_ERR(path)) |
273df556 FM |
443 | path = "(unknown)"; |
444 | printk(KERN_CRIT | |
f7c21177 TT |
445 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
446 | inode->i_sb->s_id, function, line, inode->i_ino); | |
447 | if (block) | |
448 | printk(KERN_CONT "block %llu: ", block); | |
449 | va_start(args, fmt); | |
450 | vaf.fmt = fmt; | |
451 | vaf.va = &args; | |
452 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
453 | va_end(args); |
454 | ||
455 | ext4_handle_error(inode->i_sb); | |
456 | } | |
457 | ||
2b2d6d01 | 458 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
459 | char nbuf[16]) |
460 | { | |
461 | char *errstr = NULL; | |
462 | ||
463 | switch (errno) { | |
464 | case -EIO: | |
465 | errstr = "IO failure"; | |
466 | break; | |
467 | case -ENOMEM: | |
468 | errstr = "Out of memory"; | |
469 | break; | |
470 | case -EROFS: | |
78f1ddbb TT |
471 | if (!sb || (EXT4_SB(sb)->s_journal && |
472 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
473 | errstr = "Journal has aborted"; |
474 | else | |
475 | errstr = "Readonly filesystem"; | |
476 | break; | |
477 | default: | |
478 | /* If the caller passed in an extra buffer for unknown | |
479 | * errors, textualise them now. Else we just return | |
480 | * NULL. */ | |
481 | if (nbuf) { | |
482 | /* Check for truncated error codes... */ | |
483 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
484 | errstr = nbuf; | |
485 | } | |
486 | break; | |
487 | } | |
488 | ||
489 | return errstr; | |
490 | } | |
491 | ||
617ba13b | 492 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
493 | * automatically and invokes the appropriate error response. */ |
494 | ||
c398eda0 TT |
495 | void __ext4_std_error(struct super_block *sb, const char *function, |
496 | unsigned int line, int errno) | |
ac27a0ec DK |
497 | { |
498 | char nbuf[16]; | |
499 | const char *errstr; | |
500 | ||
501 | /* Special case: if the error is EROFS, and we're not already | |
502 | * inside a transaction, then there's really no point in logging | |
503 | * an error. */ | |
504 | if (errno == -EROFS && journal_current_handle() == NULL && | |
505 | (sb->s_flags & MS_RDONLY)) | |
506 | return; | |
507 | ||
617ba13b | 508 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
509 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
510 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 511 | save_error_info(sb, function, line); |
ac27a0ec | 512 | |
617ba13b | 513 | ext4_handle_error(sb); |
ac27a0ec DK |
514 | } |
515 | ||
516 | /* | |
617ba13b | 517 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
518 | * abort function may be used to deal with unrecoverable failures such |
519 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
520 | * | |
521 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
522 | * unless the error response on the fs has been set to panic in which | |
523 | * case we take the easy way out and panic immediately. | |
524 | */ | |
525 | ||
c67d859e | 526 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 527 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
528 | { |
529 | va_list args; | |
530 | ||
1c13d5c0 | 531 | save_error_info(sb, function, line); |
ac27a0ec | 532 | va_start(args, fmt); |
c398eda0 TT |
533 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
534 | function, line); | |
ac27a0ec DK |
535 | vprintk(fmt, args); |
536 | printk("\n"); | |
537 | va_end(args); | |
538 | ||
1c13d5c0 TT |
539 | if ((sb->s_flags & MS_RDONLY) == 0) { |
540 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
541 | sb->s_flags |= MS_RDONLY; | |
542 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
543 | if (EXT4_SB(sb)->s_journal) | |
544 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
545 | save_error_info(sb, function, line); | |
546 | } | |
ac27a0ec | 547 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 548 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
549 | } |
550 | ||
0ff2ea7d | 551 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 552 | { |
0ff2ea7d | 553 | struct va_format vaf; |
b31e1552 ES |
554 | va_list args; |
555 | ||
556 | va_start(args, fmt); | |
0ff2ea7d JP |
557 | vaf.fmt = fmt; |
558 | vaf.va = &args; | |
559 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
560 | va_end(args); |
561 | } | |
562 | ||
12062ddd | 563 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 564 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 565 | { |
0ff2ea7d | 566 | struct va_format vaf; |
ac27a0ec DK |
567 | va_list args; |
568 | ||
569 | va_start(args, fmt); | |
0ff2ea7d JP |
570 | vaf.fmt = fmt; |
571 | vaf.va = &args; | |
572 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
573 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
574 | va_end(args); |
575 | } | |
576 | ||
e29136f8 TT |
577 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
578 | struct super_block *sb, ext4_group_t grp, | |
579 | unsigned long ino, ext4_fsblk_t block, | |
580 | const char *fmt, ...) | |
5d1b1b3f AK |
581 | __releases(bitlock) |
582 | __acquires(bitlock) | |
583 | { | |
0ff2ea7d | 584 | struct va_format vaf; |
5d1b1b3f AK |
585 | va_list args; |
586 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
587 | ||
1c13d5c0 TT |
588 | es->s_last_error_ino = cpu_to_le32(ino); |
589 | es->s_last_error_block = cpu_to_le64(block); | |
590 | __save_error_info(sb, function, line); | |
0ff2ea7d | 591 | |
5d1b1b3f | 592 | va_start(args, fmt); |
0ff2ea7d JP |
593 | |
594 | vaf.fmt = fmt; | |
595 | vaf.va = &args; | |
e29136f8 TT |
596 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", |
597 | sb->s_id, function, line, grp); | |
598 | if (ino) | |
0ff2ea7d | 599 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 600 | if (block) |
0ff2ea7d JP |
601 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
602 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
603 | va_end(args); |
604 | ||
605 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 606 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
607 | return; |
608 | } | |
1c13d5c0 | 609 | |
5d1b1b3f AK |
610 | ext4_unlock_group(sb, grp); |
611 | ext4_handle_error(sb); | |
612 | /* | |
613 | * We only get here in the ERRORS_RO case; relocking the group | |
614 | * may be dangerous, but nothing bad will happen since the | |
615 | * filesystem will have already been marked read/only and the | |
616 | * journal has been aborted. We return 1 as a hint to callers | |
617 | * who might what to use the return value from | |
618 | * ext4_grp_locked_error() to distinguish beween the | |
619 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
620 | * aggressively from the ext4 function in question, with a | |
621 | * more appropriate error code. | |
622 | */ | |
623 | ext4_lock_group(sb, grp); | |
624 | return; | |
625 | } | |
626 | ||
617ba13b | 627 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 628 | { |
617ba13b | 629 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 630 | |
617ba13b | 631 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
632 | return; |
633 | ||
12062ddd | 634 | ext4_warning(sb, |
ac27a0ec DK |
635 | "updating to rev %d because of new feature flag, " |
636 | "running e2fsck is recommended", | |
617ba13b | 637 | EXT4_DYNAMIC_REV); |
ac27a0ec | 638 | |
617ba13b MC |
639 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
640 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
641 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
642 | /* leave es->s_feature_*compat flags alone */ |
643 | /* es->s_uuid will be set by e2fsck if empty */ | |
644 | ||
645 | /* | |
646 | * The rest of the superblock fields should be zero, and if not it | |
647 | * means they are likely already in use, so leave them alone. We | |
648 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
649 | */ | |
650 | } | |
651 | ||
652 | /* | |
653 | * Open the external journal device | |
654 | */ | |
b31e1552 | 655 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
656 | { |
657 | struct block_device *bdev; | |
658 | char b[BDEVNAME_SIZE]; | |
659 | ||
660 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); | |
661 | if (IS_ERR(bdev)) | |
662 | goto fail; | |
663 | return bdev; | |
664 | ||
665 | fail: | |
b31e1552 | 666 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
667 | __bdevname(dev, b), PTR_ERR(bdev)); |
668 | return NULL; | |
669 | } | |
670 | ||
671 | /* | |
672 | * Release the journal device | |
673 | */ | |
617ba13b | 674 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec DK |
675 | { |
676 | bd_release(bdev); | |
9a1c3542 | 677 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
678 | } |
679 | ||
617ba13b | 680 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
681 | { |
682 | struct block_device *bdev; | |
683 | int ret = -ENODEV; | |
684 | ||
685 | bdev = sbi->journal_bdev; | |
686 | if (bdev) { | |
617ba13b | 687 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
688 | sbi->journal_bdev = NULL; |
689 | } | |
690 | return ret; | |
691 | } | |
692 | ||
693 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
694 | { | |
617ba13b | 695 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
696 | } |
697 | ||
617ba13b | 698 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
699 | { |
700 | struct list_head *l; | |
701 | ||
b31e1552 ES |
702 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
703 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
704 | |
705 | printk(KERN_ERR "sb_info orphan list:\n"); | |
706 | list_for_each(l, &sbi->s_orphan) { | |
707 | struct inode *inode = orphan_list_entry(l); | |
708 | printk(KERN_ERR " " | |
709 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
710 | inode->i_sb->s_id, inode->i_ino, inode, | |
711 | inode->i_mode, inode->i_nlink, | |
712 | NEXT_ORPHAN(inode)); | |
713 | } | |
714 | } | |
715 | ||
2b2d6d01 | 716 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 717 | { |
617ba13b MC |
718 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
719 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 720 | int i, err; |
ac27a0ec | 721 | |
857ac889 | 722 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
723 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
724 | ||
4c0425ff MC |
725 | flush_workqueue(sbi->dio_unwritten_wq); |
726 | destroy_workqueue(sbi->dio_unwritten_wq); | |
727 | ||
a9e220f8 | 728 | lock_super(sb); |
8c85e125 | 729 | if (sb->s_dirt) |
ebc1ac16 | 730 | ext4_commit_super(sb, 1); |
8c85e125 | 731 | |
0390131b FM |
732 | if (sbi->s_journal) { |
733 | err = jbd2_journal_destroy(sbi->s_journal); | |
734 | sbi->s_journal = NULL; | |
735 | if (err < 0) | |
c67d859e | 736 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 737 | } |
d4edac31 | 738 | |
a1c6c569 | 739 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
740 | ext4_release_system_zone(sb); |
741 | ext4_mb_release(sb); | |
742 | ext4_ext_release(sb); | |
743 | ext4_xattr_put_super(sb); | |
744 | ||
ac27a0ec | 745 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 746 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 747 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 748 | ext4_commit_super(sb, 1); |
ac27a0ec | 749 | } |
240799cd | 750 | if (sbi->s_proc) { |
9f6200bb | 751 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 752 | } |
3197ebdb | 753 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
754 | |
755 | for (i = 0; i < sbi->s_gdb_count; i++) | |
756 | brelse(sbi->s_group_desc[i]); | |
757 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
758 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
759 | vfree(sbi->s_flex_groups); | |
760 | else | |
761 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
762 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
763 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
764 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 765 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
766 | brelse(sbi->s_sbh); |
767 | #ifdef CONFIG_QUOTA | |
768 | for (i = 0; i < MAXQUOTAS; i++) | |
769 | kfree(sbi->s_qf_names[i]); | |
770 | #endif | |
771 | ||
772 | /* Debugging code just in case the in-memory inode orphan list | |
773 | * isn't empty. The on-disk one can be non-empty if we've | |
774 | * detected an error and taken the fs readonly, but the | |
775 | * in-memory list had better be clean by this point. */ | |
776 | if (!list_empty(&sbi->s_orphan)) | |
777 | dump_orphan_list(sb, sbi); | |
778 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
779 | ||
f98393a6 | 780 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
781 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
782 | /* | |
783 | * Invalidate the journal device's buffers. We don't want them | |
784 | * floating about in memory - the physical journal device may | |
785 | * hotswapped, and it breaks the `ro-after' testing code. | |
786 | */ | |
787 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 788 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 789 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
790 | } |
791 | sb->s_fs_info = NULL; | |
3197ebdb TT |
792 | /* |
793 | * Now that we are completely done shutting down the | |
794 | * superblock, we need to actually destroy the kobject. | |
795 | */ | |
3197ebdb TT |
796 | unlock_super(sb); |
797 | kobject_put(&sbi->s_kobj); | |
798 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 799 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 800 | kfree(sbi); |
ac27a0ec DK |
801 | } |
802 | ||
e18b890b | 803 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
804 | |
805 | /* | |
806 | * Called inside transaction, so use GFP_NOFS | |
807 | */ | |
617ba13b | 808 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 809 | { |
617ba13b | 810 | struct ext4_inode_info *ei; |
ac27a0ec | 811 | |
e6b4f8da | 812 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
813 | if (!ei) |
814 | return NULL; | |
0b8e58a1 | 815 | |
ac27a0ec | 816 | ei->vfs_inode.i_version = 1; |
91246c00 | 817 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 818 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
819 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
820 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
821 | /* |
822 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
823 | * therefore it can be null here. Don't check it, just initialize | |
824 | * jinode. | |
825 | */ | |
678aaf48 | 826 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
827 | ei->i_reserved_data_blocks = 0; |
828 | ei->i_reserved_meta_blocks = 0; | |
829 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 830 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 831 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
832 | #ifdef CONFIG_QUOTA |
833 | ei->i_reserved_quota = 0; | |
834 | #endif | |
c7064ef1 | 835 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 836 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 837 | ei->cur_aio_dio = NULL; |
b436b9be JK |
838 | ei->i_sync_tid = 0; |
839 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 840 | atomic_set(&ei->i_ioend_count, 0); |
0b8e58a1 | 841 | |
ac27a0ec DK |
842 | return &ei->vfs_inode; |
843 | } | |
844 | ||
7ff9c073 TT |
845 | static int ext4_drop_inode(struct inode *inode) |
846 | { | |
847 | int drop = generic_drop_inode(inode); | |
848 | ||
849 | trace_ext4_drop_inode(inode, drop); | |
850 | return drop; | |
851 | } | |
852 | ||
617ba13b | 853 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 854 | { |
f7ad6d2e | 855 | ext4_ioend_wait(inode); |
9f7dd93d | 856 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
857 | ext4_msg(inode->i_sb, KERN_ERR, |
858 | "Inode %lu (%p): orphan list check failed!", | |
859 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
860 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
861 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
862 | true); | |
863 | dump_stack(); | |
864 | } | |
617ba13b | 865 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
866 | } |
867 | ||
51cc5068 | 868 | static void init_once(void *foo) |
ac27a0ec | 869 | { |
617ba13b | 870 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 871 | |
a35afb83 | 872 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 873 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 874 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 875 | #endif |
0e855ac8 | 876 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 877 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
878 | } |
879 | ||
880 | static int init_inodecache(void) | |
881 | { | |
617ba13b MC |
882 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
883 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
884 | 0, (SLAB_RECLAIM_ACCOUNT| |
885 | SLAB_MEM_SPREAD), | |
20c2df83 | 886 | init_once); |
617ba13b | 887 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
888 | return -ENOMEM; |
889 | return 0; | |
890 | } | |
891 | ||
892 | static void destroy_inodecache(void) | |
893 | { | |
617ba13b | 894 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
895 | } |
896 | ||
0930fcc1 | 897 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 898 | { |
0930fcc1 AV |
899 | invalidate_inode_buffers(inode); |
900 | end_writeback(inode); | |
9f754758 | 901 | dquot_drop(inode); |
c2ea3fde | 902 | ext4_discard_preallocations(inode); |
0390131b FM |
903 | if (EXT4_JOURNAL(inode)) |
904 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 905 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
906 | } |
907 | ||
2b2d6d01 TT |
908 | static inline void ext4_show_quota_options(struct seq_file *seq, |
909 | struct super_block *sb) | |
ac27a0ec DK |
910 | { |
911 | #if defined(CONFIG_QUOTA) | |
617ba13b | 912 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 913 | |
5a20bdfc JK |
914 | if (sbi->s_jquota_fmt) { |
915 | char *fmtname = ""; | |
916 | ||
917 | switch (sbi->s_jquota_fmt) { | |
918 | case QFMT_VFS_OLD: | |
919 | fmtname = "vfsold"; | |
920 | break; | |
921 | case QFMT_VFS_V0: | |
922 | fmtname = "vfsv0"; | |
923 | break; | |
924 | case QFMT_VFS_V1: | |
925 | fmtname = "vfsv1"; | |
926 | break; | |
927 | } | |
928 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
929 | } | |
ac27a0ec DK |
930 | |
931 | if (sbi->s_qf_names[USRQUOTA]) | |
932 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
933 | ||
934 | if (sbi->s_qf_names[GRPQUOTA]) | |
935 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
936 | ||
482a7425 | 937 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
938 | seq_puts(seq, ",usrquota"); |
939 | ||
482a7425 | 940 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
941 | seq_puts(seq, ",grpquota"); |
942 | #endif | |
943 | } | |
944 | ||
d9c9bef1 MS |
945 | /* |
946 | * Show an option if | |
947 | * - it's set to a non-default value OR | |
948 | * - if the per-sb default is different from the global default | |
949 | */ | |
617ba13b | 950 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 951 | { |
aa22df2c AK |
952 | int def_errors; |
953 | unsigned long def_mount_opts; | |
ac27a0ec | 954 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
955 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
956 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
957 | |
958 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 959 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
960 | |
961 | if (sbi->s_sb_block != 1) | |
962 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
963 | if (test_opt(sb, MINIX_DF)) | |
964 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 965 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
966 | seq_puts(seq, ",grpid"); |
967 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
968 | seq_puts(seq, ",nogrpid"); | |
969 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
970 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
971 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
972 | } | |
973 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
974 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
975 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
976 | } | |
bb4f397a | 977 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 978 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
979 | def_errors == EXT4_ERRORS_CONTINUE) { |
980 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
981 | } |
982 | } | |
aa22df2c | 983 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 984 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 985 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 986 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 987 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 988 | seq_puts(seq, ",nouid32"); |
aa22df2c | 989 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
990 | seq_puts(seq, ",debug"); |
991 | if (test_opt(sb, OLDALLOC)) | |
992 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 993 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
994 | if (test_opt(sb, XATTR_USER) && |
995 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
996 | seq_puts(seq, ",user_xattr"); |
997 | if (!test_opt(sb, XATTR_USER) && | |
998 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
999 | seq_puts(seq, ",nouser_xattr"); | |
1000 | } | |
1001 | #endif | |
03010a33 | 1002 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1003 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1004 | seq_puts(seq, ",acl"); |
1005 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1006 | seq_puts(seq, ",noacl"); | |
1007 | #endif | |
30773840 | 1008 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1009 | seq_printf(seq, ",commit=%u", |
1010 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1011 | } | |
30773840 TT |
1012 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1013 | seq_printf(seq, ",min_batch_time=%u", | |
1014 | (unsigned) sbi->s_min_batch_time); | |
1015 | } | |
1016 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1017 | seq_printf(seq, ",max_batch_time=%u", | |
1018 | (unsigned) sbi->s_min_batch_time); | |
1019 | } | |
1020 | ||
571640ca ES |
1021 | /* |
1022 | * We're changing the default of barrier mount option, so | |
1023 | * let's always display its mount state so it's clear what its | |
1024 | * status is. | |
1025 | */ | |
1026 | seq_puts(seq, ",barrier="); | |
1027 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1028 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1029 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1030 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1031 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1032 | if (test_opt(sb, I_VERSION)) |
1033 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1034 | if (!test_opt(sb, DELALLOC) && |
1035 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1036 | seq_puts(seq, ",nodelalloc"); |
1037 | ||
1449032b TT |
1038 | if (test_opt(sb, MBLK_IO_SUBMIT)) |
1039 | seq_puts(seq, ",mblk_io_submit"); | |
cb45bbe4 MS |
1040 | if (sbi->s_stripe) |
1041 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1042 | /* |
1043 | * journal mode get enabled in different ways | |
1044 | * So just print the value even if we didn't specify it | |
1045 | */ | |
617ba13b | 1046 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1047 | seq_puts(seq, ",data=journal"); |
617ba13b | 1048 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1049 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1050 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1051 | seq_puts(seq, ",data=writeback"); |
1052 | ||
240799cd TT |
1053 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1054 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1055 | sbi->s_inode_readahead_blks); | |
1056 | ||
5bf5683a HK |
1057 | if (test_opt(sb, DATA_ERR_ABORT)) |
1058 | seq_puts(seq, ",data_err=abort"); | |
1059 | ||
afd4672d | 1060 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1061 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1062 | |
8b67f04a | 1063 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1064 | seq_puts(seq, ",discard"); |
1065 | ||
e3bb52ae ES |
1066 | if (test_opt(sb, NOLOAD)) |
1067 | seq_puts(seq, ",norecovery"); | |
1068 | ||
744692dc JZ |
1069 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1070 | seq_puts(seq, ",dioread_nolock"); | |
1071 | ||
8b67f04a TT |
1072 | if (test_opt(sb, BLOCK_VALIDITY) && |
1073 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1074 | seq_puts(seq, ",block_validity"); | |
1075 | ||
bfff6873 LC |
1076 | if (!test_opt(sb, INIT_INODE_TABLE)) |
1077 | seq_puts(seq, ",noinit_inode_table"); | |
1078 | else if (sbi->s_li_wait_mult) | |
1079 | seq_printf(seq, ",init_inode_table=%u", | |
1080 | (unsigned) sbi->s_li_wait_mult); | |
1081 | ||
617ba13b | 1082 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1083 | |
ac27a0ec DK |
1084 | return 0; |
1085 | } | |
1086 | ||
1b961ac0 | 1087 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1088 | u64 ino, u32 generation) |
ac27a0ec | 1089 | { |
ac27a0ec | 1090 | struct inode *inode; |
ac27a0ec | 1091 | |
617ba13b | 1092 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1093 | return ERR_PTR(-ESTALE); |
617ba13b | 1094 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1095 | return ERR_PTR(-ESTALE); |
1096 | ||
1097 | /* iget isn't really right if the inode is currently unallocated!! | |
1098 | * | |
617ba13b | 1099 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1100 | * deleted, so we should be safe. |
1101 | * | |
1102 | * Currently we don't know the generation for parent directory, so | |
1103 | * a generation of 0 means "accept any" | |
1104 | */ | |
1d1fe1ee DH |
1105 | inode = ext4_iget(sb, ino); |
1106 | if (IS_ERR(inode)) | |
1107 | return ERR_CAST(inode); | |
1108 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1109 | iput(inode); |
1110 | return ERR_PTR(-ESTALE); | |
1111 | } | |
1b961ac0 CH |
1112 | |
1113 | return inode; | |
1114 | } | |
1115 | ||
1116 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1117 | int fh_len, int fh_type) |
1b961ac0 CH |
1118 | { |
1119 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1120 | ext4_nfs_get_inode); | |
1121 | } | |
1122 | ||
1123 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1124 | int fh_len, int fh_type) |
1b961ac0 CH |
1125 | { |
1126 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1127 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1128 | } |
1129 | ||
c39a7f84 TO |
1130 | /* |
1131 | * Try to release metadata pages (indirect blocks, directories) which are | |
1132 | * mapped via the block device. Since these pages could have journal heads | |
1133 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1134 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1135 | */ | |
0b8e58a1 AD |
1136 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1137 | gfp_t wait) | |
c39a7f84 TO |
1138 | { |
1139 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1140 | ||
1141 | WARN_ON(PageChecked(page)); | |
1142 | if (!page_has_buffers(page)) | |
1143 | return 0; | |
1144 | if (journal) | |
1145 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1146 | wait & ~__GFP_WAIT); | |
1147 | return try_to_free_buffers(page); | |
1148 | } | |
1149 | ||
ac27a0ec | 1150 | #ifdef CONFIG_QUOTA |
af5bc92d | 1151 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1152 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1153 | |
617ba13b MC |
1154 | static int ext4_write_dquot(struct dquot *dquot); |
1155 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1156 | static int ext4_release_dquot(struct dquot *dquot); | |
1157 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1158 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1159 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 1160 | char *path); |
ca0e05e4 | 1161 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1162 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1163 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1164 | size_t len, loff_t off); |
617ba13b | 1165 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1166 | const char *data, size_t len, loff_t off); |
1167 | ||
61e225dc | 1168 | static const struct dquot_operations ext4_quota_operations = { |
a9e7f447 | 1169 | #ifdef CONFIG_QUOTA |
60e58e0f | 1170 | .get_reserved_space = ext4_get_reserved_space, |
a9e7f447 | 1171 | #endif |
617ba13b MC |
1172 | .write_dquot = ext4_write_dquot, |
1173 | .acquire_dquot = ext4_acquire_dquot, | |
1174 | .release_dquot = ext4_release_dquot, | |
1175 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1176 | .write_info = ext4_write_info, |
1177 | .alloc_dquot = dquot_alloc, | |
1178 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1179 | }; |
1180 | ||
0d54b217 | 1181 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1182 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1183 | .quota_off = ext4_quota_off, |
287a8095 CH |
1184 | .quota_sync = dquot_quota_sync, |
1185 | .get_info = dquot_get_dqinfo, | |
1186 | .set_info = dquot_set_dqinfo, | |
1187 | .get_dqblk = dquot_get_dqblk, | |
1188 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1189 | }; |
1190 | #endif | |
1191 | ||
ee9b6d61 | 1192 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1193 | .alloc_inode = ext4_alloc_inode, |
1194 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1195 | .write_inode = ext4_write_inode, |
1196 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1197 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1198 | .evict_inode = ext4_evict_inode, |
617ba13b | 1199 | .put_super = ext4_put_super, |
617ba13b | 1200 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1201 | .freeze_fs = ext4_freeze, |
1202 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1203 | .statfs = ext4_statfs, |
1204 | .remount_fs = ext4_remount, | |
617ba13b | 1205 | .show_options = ext4_show_options, |
ac27a0ec | 1206 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1207 | .quota_read = ext4_quota_read, |
1208 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1209 | #endif |
c39a7f84 | 1210 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1211 | }; |
1212 | ||
9ca92389 TT |
1213 | static const struct super_operations ext4_nojournal_sops = { |
1214 | .alloc_inode = ext4_alloc_inode, | |
1215 | .destroy_inode = ext4_destroy_inode, | |
1216 | .write_inode = ext4_write_inode, | |
1217 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1218 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1219 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1220 | .write_super = ext4_write_super, |
1221 | .put_super = ext4_put_super, | |
1222 | .statfs = ext4_statfs, | |
1223 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1224 | .show_options = ext4_show_options, |
1225 | #ifdef CONFIG_QUOTA | |
1226 | .quota_read = ext4_quota_read, | |
1227 | .quota_write = ext4_quota_write, | |
1228 | #endif | |
1229 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1230 | }; | |
1231 | ||
39655164 | 1232 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1233 | .fh_to_dentry = ext4_fh_to_dentry, |
1234 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1235 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1236 | }; |
1237 | ||
1238 | enum { | |
1239 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1240 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1241 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1242 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1243 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1244 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1245 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1246 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1247 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1248 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1249 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1250 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1251 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1252 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
1449032b TT |
1253 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1254 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1255 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1256 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1257 | Opt_discard, Opt_nodiscard, |
bfff6873 | 1258 | Opt_init_inode_table, Opt_noinit_inode_table, |
ac27a0ec DK |
1259 | }; |
1260 | ||
a447c093 | 1261 | static const match_table_t tokens = { |
ac27a0ec DK |
1262 | {Opt_bsd_df, "bsddf"}, |
1263 | {Opt_minix_df, "minixdf"}, | |
1264 | {Opt_grpid, "grpid"}, | |
1265 | {Opt_grpid, "bsdgroups"}, | |
1266 | {Opt_nogrpid, "nogrpid"}, | |
1267 | {Opt_nogrpid, "sysvgroups"}, | |
1268 | {Opt_resgid, "resgid=%u"}, | |
1269 | {Opt_resuid, "resuid=%u"}, | |
1270 | {Opt_sb, "sb=%u"}, | |
1271 | {Opt_err_cont, "errors=continue"}, | |
1272 | {Opt_err_panic, "errors=panic"}, | |
1273 | {Opt_err_ro, "errors=remount-ro"}, | |
1274 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1275 | {Opt_debug, "debug"}, |
1276 | {Opt_oldalloc, "oldalloc"}, | |
1277 | {Opt_orlov, "orlov"}, | |
1278 | {Opt_user_xattr, "user_xattr"}, | |
1279 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1280 | {Opt_acl, "acl"}, | |
1281 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1282 | {Opt_noload, "noload"}, |
e3bb52ae | 1283 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1284 | {Opt_nobh, "nobh"}, |
1285 | {Opt_bh, "bh"}, | |
1286 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1287 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1288 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1289 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1290 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1291 | {Opt_journal_checksum, "journal_checksum"}, |
1292 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1293 | {Opt_abort, "abort"}, |
1294 | {Opt_data_journal, "data=journal"}, | |
1295 | {Opt_data_ordered, "data=ordered"}, | |
1296 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1297 | {Opt_data_err_abort, "data_err=abort"}, |
1298 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1299 | {Opt_offusrjquota, "usrjquota="}, |
1300 | {Opt_usrjquota, "usrjquota=%s"}, | |
1301 | {Opt_offgrpjquota, "grpjquota="}, | |
1302 | {Opt_grpjquota, "grpjquota=%s"}, | |
1303 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1304 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1305 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1306 | {Opt_grpquota, "grpquota"}, |
1307 | {Opt_noquota, "noquota"}, | |
1308 | {Opt_quota, "quota"}, | |
1309 | {Opt_usrquota, "usrquota"}, | |
1310 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1311 | {Opt_barrier, "barrier"}, |
1312 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1313 | {Opt_i_version, "i_version"}, |
c9de560d | 1314 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1315 | {Opt_resize, "resize"}, |
64769240 | 1316 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1317 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1318 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1319 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1320 | {Opt_block_validity, "block_validity"}, |
1321 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1322 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1323 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1324 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1325 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1326 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1327 | {Opt_dioread_nolock, "dioread_nolock"}, |
1328 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1329 | {Opt_discard, "discard"}, |
1330 | {Opt_nodiscard, "nodiscard"}, | |
bfff6873 LC |
1331 | {Opt_init_inode_table, "init_itable=%u"}, |
1332 | {Opt_init_inode_table, "init_itable"}, | |
1333 | {Opt_noinit_inode_table, "noinit_itable"}, | |
f3f12faa | 1334 | {Opt_err, NULL}, |
ac27a0ec DK |
1335 | }; |
1336 | ||
617ba13b | 1337 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1338 | { |
617ba13b | 1339 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1340 | char *options = (char *) *data; |
1341 | ||
1342 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1343 | return 1; /* Default location */ | |
0b8e58a1 | 1344 | |
ac27a0ec | 1345 | options += 3; |
0b8e58a1 | 1346 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1347 | sb_block = simple_strtoul(options, &options, 0); |
1348 | if (*options && *options != ',') { | |
4776004f | 1349 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1350 | (char *) *data); |
1351 | return 1; | |
1352 | } | |
1353 | if (*options == ',') | |
1354 | options++; | |
1355 | *data = (void *) options; | |
0b8e58a1 | 1356 | |
ac27a0ec DK |
1357 | return sb_block; |
1358 | } | |
1359 | ||
b3881f74 | 1360 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1361 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1362 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1363 | |
56c50f11 DM |
1364 | #ifdef CONFIG_QUOTA |
1365 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1366 | { | |
1367 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1368 | char *qname; | |
1369 | ||
1370 | if (sb_any_quota_loaded(sb) && | |
1371 | !sbi->s_qf_names[qtype]) { | |
1372 | ext4_msg(sb, KERN_ERR, | |
1373 | "Cannot change journaled " | |
1374 | "quota options when quota turned on"); | |
1375 | return 0; | |
1376 | } | |
1377 | qname = match_strdup(args); | |
1378 | if (!qname) { | |
1379 | ext4_msg(sb, KERN_ERR, | |
1380 | "Not enough memory for storing quotafile name"); | |
1381 | return 0; | |
1382 | } | |
1383 | if (sbi->s_qf_names[qtype] && | |
1384 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1385 | ext4_msg(sb, KERN_ERR, | |
1386 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1387 | kfree(qname); | |
1388 | return 0; | |
1389 | } | |
1390 | sbi->s_qf_names[qtype] = qname; | |
1391 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1392 | ext4_msg(sb, KERN_ERR, | |
1393 | "quotafile must be on filesystem root"); | |
1394 | kfree(sbi->s_qf_names[qtype]); | |
1395 | sbi->s_qf_names[qtype] = NULL; | |
1396 | return 0; | |
1397 | } | |
fd8c37ec | 1398 | set_opt(sb, QUOTA); |
56c50f11 DM |
1399 | return 1; |
1400 | } | |
1401 | ||
1402 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1403 | { | |
1404 | ||
1405 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1406 | ||
1407 | if (sb_any_quota_loaded(sb) && | |
1408 | sbi->s_qf_names[qtype]) { | |
1409 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1410 | " when quota turned on"); | |
1411 | return 0; | |
1412 | } | |
1413 | /* | |
1414 | * The space will be released later when all options are confirmed | |
1415 | * to be correct | |
1416 | */ | |
1417 | sbi->s_qf_names[qtype] = NULL; | |
1418 | return 1; | |
1419 | } | |
1420 | #endif | |
1421 | ||
2b2d6d01 | 1422 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1423 | unsigned long *journal_devnum, |
b3881f74 | 1424 | unsigned int *journal_ioprio, |
2b2d6d01 | 1425 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1426 | { |
617ba13b | 1427 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1428 | char *p; |
ac27a0ec DK |
1429 | substring_t args[MAX_OPT_ARGS]; |
1430 | int data_opt = 0; | |
1431 | int option; | |
1432 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1433 | int qfmt; |
ac27a0ec DK |
1434 | #endif |
1435 | ||
1436 | if (!options) | |
1437 | return 1; | |
1438 | ||
2b2d6d01 | 1439 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1440 | int token; |
1441 | if (!*p) | |
1442 | continue; | |
1443 | ||
15121c18 ES |
1444 | /* |
1445 | * Initialize args struct so we know whether arg was | |
1446 | * found; some options take optional arguments. | |
1447 | */ | |
1448 | args[0].to = args[0].from = 0; | |
ac27a0ec DK |
1449 | token = match_token(p, tokens, args); |
1450 | switch (token) { | |
1451 | case Opt_bsd_df: | |
437ca0fd | 1452 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1453 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1454 | break; |
1455 | case Opt_minix_df: | |
437ca0fd | 1456 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1457 | set_opt(sb, MINIX_DF); |
437ca0fd | 1458 | |
ac27a0ec DK |
1459 | break; |
1460 | case Opt_grpid: | |
437ca0fd | 1461 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1462 | set_opt(sb, GRPID); |
437ca0fd | 1463 | |
ac27a0ec DK |
1464 | break; |
1465 | case Opt_nogrpid: | |
437ca0fd | 1466 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1467 | clear_opt(sb, GRPID); |
437ca0fd | 1468 | |
ac27a0ec DK |
1469 | break; |
1470 | case Opt_resuid: | |
1471 | if (match_int(&args[0], &option)) | |
1472 | return 0; | |
1473 | sbi->s_resuid = option; | |
1474 | break; | |
1475 | case Opt_resgid: | |
1476 | if (match_int(&args[0], &option)) | |
1477 | return 0; | |
1478 | sbi->s_resgid = option; | |
1479 | break; | |
1480 | case Opt_sb: | |
1481 | /* handled by get_sb_block() instead of here */ | |
1482 | /* *sb_block = match_int(&args[0]); */ | |
1483 | break; | |
1484 | case Opt_err_panic: | |
fd8c37ec TT |
1485 | clear_opt(sb, ERRORS_CONT); |
1486 | clear_opt(sb, ERRORS_RO); | |
1487 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1488 | break; |
1489 | case Opt_err_ro: | |
fd8c37ec TT |
1490 | clear_opt(sb, ERRORS_CONT); |
1491 | clear_opt(sb, ERRORS_PANIC); | |
1492 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1493 | break; |
1494 | case Opt_err_cont: | |
fd8c37ec TT |
1495 | clear_opt(sb, ERRORS_RO); |
1496 | clear_opt(sb, ERRORS_PANIC); | |
1497 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1498 | break; |
1499 | case Opt_nouid32: | |
fd8c37ec | 1500 | set_opt(sb, NO_UID32); |
ac27a0ec | 1501 | break; |
ac27a0ec | 1502 | case Opt_debug: |
fd8c37ec | 1503 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1504 | break; |
1505 | case Opt_oldalloc: | |
fd8c37ec | 1506 | set_opt(sb, OLDALLOC); |
ac27a0ec DK |
1507 | break; |
1508 | case Opt_orlov: | |
fd8c37ec | 1509 | clear_opt(sb, OLDALLOC); |
ac27a0ec | 1510 | break; |
03010a33 | 1511 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1512 | case Opt_user_xattr: |
fd8c37ec | 1513 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1514 | break; |
1515 | case Opt_nouser_xattr: | |
fd8c37ec | 1516 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1517 | break; |
1518 | #else | |
1519 | case Opt_user_xattr: | |
1520 | case Opt_nouser_xattr: | |
b31e1552 | 1521 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1522 | break; |
1523 | #endif | |
03010a33 | 1524 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1525 | case Opt_acl: |
fd8c37ec | 1526 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1527 | break; |
1528 | case Opt_noacl: | |
fd8c37ec | 1529 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1530 | break; |
1531 | #else | |
1532 | case Opt_acl: | |
1533 | case Opt_noacl: | |
b31e1552 | 1534 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1535 | break; |
1536 | #endif | |
ac27a0ec DK |
1537 | case Opt_journal_update: |
1538 | /* @@@ FIXME */ | |
1539 | /* Eventually we will want to be able to create | |
1540 | a journal file here. For now, only allow the | |
1541 | user to specify an existing inode to be the | |
1542 | journal file. */ | |
1543 | if (is_remount) { | |
b31e1552 ES |
1544 | ext4_msg(sb, KERN_ERR, |
1545 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1546 | return 0; |
1547 | } | |
fd8c37ec | 1548 | set_opt(sb, UPDATE_JOURNAL); |
ac27a0ec | 1549 | break; |
ac27a0ec DK |
1550 | case Opt_journal_dev: |
1551 | if (is_remount) { | |
b31e1552 ES |
1552 | ext4_msg(sb, KERN_ERR, |
1553 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1554 | return 0; |
1555 | } | |
1556 | if (match_int(&args[0], &option)) | |
1557 | return 0; | |
1558 | *journal_devnum = option; | |
1559 | break; | |
818d276c | 1560 | case Opt_journal_checksum: |
fd8c37ec | 1561 | set_opt(sb, JOURNAL_CHECKSUM); |
d4da6c9c | 1562 | break; |
818d276c | 1563 | case Opt_journal_async_commit: |
fd8c37ec TT |
1564 | set_opt(sb, JOURNAL_ASYNC_COMMIT); |
1565 | set_opt(sb, JOURNAL_CHECKSUM); | |
818d276c | 1566 | break; |
ac27a0ec | 1567 | case Opt_noload: |
fd8c37ec | 1568 | set_opt(sb, NOLOAD); |
ac27a0ec DK |
1569 | break; |
1570 | case Opt_commit: | |
1571 | if (match_int(&args[0], &option)) | |
1572 | return 0; | |
1573 | if (option < 0) | |
1574 | return 0; | |
1575 | if (option == 0) | |
cd02ff0b | 1576 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1577 | sbi->s_commit_interval = HZ * option; |
1578 | break; | |
30773840 TT |
1579 | case Opt_max_batch_time: |
1580 | if (match_int(&args[0], &option)) | |
1581 | return 0; | |
1582 | if (option < 0) | |
1583 | return 0; | |
1584 | if (option == 0) | |
1585 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1586 | sbi->s_max_batch_time = option; | |
1587 | break; | |
1588 | case Opt_min_batch_time: | |
1589 | if (match_int(&args[0], &option)) | |
1590 | return 0; | |
1591 | if (option < 0) | |
1592 | return 0; | |
1593 | sbi->s_min_batch_time = option; | |
1594 | break; | |
ac27a0ec | 1595 | case Opt_data_journal: |
617ba13b | 1596 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1597 | goto datacheck; |
1598 | case Opt_data_ordered: | |
617ba13b | 1599 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1600 | goto datacheck; |
1601 | case Opt_data_writeback: | |
617ba13b | 1602 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1603 | datacheck: |
1604 | if (is_remount) { | |
482a7425 | 1605 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1606 | ext4_msg(sb, KERN_ERR, |
1607 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1608 | return 0; |
1609 | } | |
1610 | } else { | |
fd8c37ec | 1611 | clear_opt(sb, DATA_FLAGS); |
ac27a0ec DK |
1612 | sbi->s_mount_opt |= data_opt; |
1613 | } | |
1614 | break; | |
5bf5683a | 1615 | case Opt_data_err_abort: |
fd8c37ec | 1616 | set_opt(sb, DATA_ERR_ABORT); |
5bf5683a HK |
1617 | break; |
1618 | case Opt_data_err_ignore: | |
fd8c37ec | 1619 | clear_opt(sb, DATA_ERR_ABORT); |
5bf5683a | 1620 | break; |
ac27a0ec DK |
1621 | #ifdef CONFIG_QUOTA |
1622 | case Opt_usrjquota: | |
56c50f11 | 1623 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1624 | return 0; |
56c50f11 DM |
1625 | break; |
1626 | case Opt_grpjquota: | |
1627 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1628 | return 0; |
ac27a0ec DK |
1629 | break; |
1630 | case Opt_offusrjquota: | |
56c50f11 DM |
1631 | if (!clear_qf_name(sb, USRQUOTA)) |
1632 | return 0; | |
1633 | break; | |
ac27a0ec | 1634 | case Opt_offgrpjquota: |
56c50f11 | 1635 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1636 | return 0; |
ac27a0ec | 1637 | break; |
56c50f11 | 1638 | |
ac27a0ec | 1639 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1640 | qfmt = QFMT_VFS_OLD; |
1641 | goto set_qf_format; | |
ac27a0ec | 1642 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1643 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1644 | goto set_qf_format; |
1645 | case Opt_jqfmt_vfsv1: | |
1646 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1647 | set_qf_format: |
17bd13b3 | 1648 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1649 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1650 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1651 | "journaled quota options when " |
b31e1552 | 1652 | "quota turned on"); |
dfc5d03f JK |
1653 | return 0; |
1654 | } | |
1655 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1656 | break; |
1657 | case Opt_quota: | |
1658 | case Opt_usrquota: | |
fd8c37ec TT |
1659 | set_opt(sb, QUOTA); |
1660 | set_opt(sb, USRQUOTA); | |
ac27a0ec DK |
1661 | break; |
1662 | case Opt_grpquota: | |
fd8c37ec TT |
1663 | set_opt(sb, QUOTA); |
1664 | set_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1665 | break; |
1666 | case Opt_noquota: | |
17bd13b3 | 1667 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1668 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1669 | "options when quota turned on"); | |
ac27a0ec DK |
1670 | return 0; |
1671 | } | |
fd8c37ec TT |
1672 | clear_opt(sb, QUOTA); |
1673 | clear_opt(sb, USRQUOTA); | |
1674 | clear_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1675 | break; |
1676 | #else | |
1677 | case Opt_quota: | |
1678 | case Opt_usrquota: | |
1679 | case Opt_grpquota: | |
b31e1552 ES |
1680 | ext4_msg(sb, KERN_ERR, |
1681 | "quota options not supported"); | |
cd59e7b9 | 1682 | break; |
ac27a0ec DK |
1683 | case Opt_usrjquota: |
1684 | case Opt_grpjquota: | |
1685 | case Opt_offusrjquota: | |
1686 | case Opt_offgrpjquota: | |
1687 | case Opt_jqfmt_vfsold: | |
1688 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1689 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1690 | ext4_msg(sb, KERN_ERR, |
1691 | "journaled quota options not supported"); | |
ac27a0ec DK |
1692 | break; |
1693 | case Opt_noquota: | |
1694 | break; | |
1695 | #endif | |
1696 | case Opt_abort: | |
4ab2f15b | 1697 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1698 | break; |
06705bff | 1699 | case Opt_nobarrier: |
fd8c37ec | 1700 | clear_opt(sb, BARRIER); |
06705bff | 1701 | break; |
ac27a0ec | 1702 | case Opt_barrier: |
15121c18 ES |
1703 | if (args[0].from) { |
1704 | if (match_int(&args[0], &option)) | |
1705 | return 0; | |
1706 | } else | |
1707 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec | 1708 | if (option) |
fd8c37ec | 1709 | set_opt(sb, BARRIER); |
ac27a0ec | 1710 | else |
fd8c37ec | 1711 | clear_opt(sb, BARRIER); |
ac27a0ec DK |
1712 | break; |
1713 | case Opt_ignore: | |
1714 | break; | |
1715 | case Opt_resize: | |
1716 | if (!is_remount) { | |
b31e1552 ES |
1717 | ext4_msg(sb, KERN_ERR, |
1718 | "resize option only available " | |
1719 | "for remount"); | |
ac27a0ec DK |
1720 | return 0; |
1721 | } | |
1722 | if (match_int(&args[0], &option) != 0) | |
1723 | return 0; | |
1724 | *n_blocks_count = option; | |
1725 | break; | |
1726 | case Opt_nobh: | |
206f7ab4 CH |
1727 | ext4_msg(sb, KERN_WARNING, |
1728 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1729 | break; |
1730 | case Opt_bh: | |
206f7ab4 CH |
1731 | ext4_msg(sb, KERN_WARNING, |
1732 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1733 | break; |
25ec56b5 | 1734 | case Opt_i_version: |
fd8c37ec | 1735 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1736 | sb->s_flags |= MS_I_VERSION; |
1737 | break; | |
dd919b98 | 1738 | case Opt_nodelalloc: |
fd8c37ec | 1739 | clear_opt(sb, DELALLOC); |
dd919b98 | 1740 | break; |
1449032b | 1741 | case Opt_mblk_io_submit: |
fd8c37ec | 1742 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1743 | break; |
1744 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1745 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1746 | break; |
c9de560d AT |
1747 | case Opt_stripe: |
1748 | if (match_int(&args[0], &option)) | |
1749 | return 0; | |
1750 | if (option < 0) | |
1751 | return 0; | |
1752 | sbi->s_stripe = option; | |
1753 | break; | |
64769240 | 1754 | case Opt_delalloc: |
fd8c37ec | 1755 | set_opt(sb, DELALLOC); |
64769240 | 1756 | break; |
6fd058f7 | 1757 | case Opt_block_validity: |
fd8c37ec | 1758 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1759 | break; |
1760 | case Opt_noblock_validity: | |
fd8c37ec | 1761 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1762 | break; |
240799cd TT |
1763 | case Opt_inode_readahead_blks: |
1764 | if (match_int(&args[0], &option)) | |
1765 | return 0; | |
1766 | if (option < 0 || option > (1 << 30)) | |
1767 | return 0; | |
f7c43950 | 1768 | if (!is_power_of_2(option)) { |
b31e1552 ES |
1769 | ext4_msg(sb, KERN_ERR, |
1770 | "EXT4-fs: inode_readahead_blks" | |
1771 | " must be a power of 2"); | |
3197ebdb TT |
1772 | return 0; |
1773 | } | |
240799cd TT |
1774 | sbi->s_inode_readahead_blks = option; |
1775 | break; | |
b3881f74 TT |
1776 | case Opt_journal_ioprio: |
1777 | if (match_int(&args[0], &option)) | |
1778 | return 0; | |
1779 | if (option < 0 || option > 7) | |
1780 | break; | |
1781 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1782 | option); | |
1783 | break; | |
06705bff | 1784 | case Opt_noauto_da_alloc: |
fd8c37ec | 1785 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1786 | break; |
afd4672d | 1787 | case Opt_auto_da_alloc: |
15121c18 ES |
1788 | if (args[0].from) { |
1789 | if (match_int(&args[0], &option)) | |
1790 | return 0; | |
1791 | } else | |
1792 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1793 | if (option) |
fd8c37ec | 1794 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1795 | else |
fd8c37ec | 1796 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1797 | break; |
5328e635 | 1798 | case Opt_discard: |
fd8c37ec | 1799 | set_opt(sb, DISCARD); |
5328e635 ES |
1800 | break; |
1801 | case Opt_nodiscard: | |
fd8c37ec | 1802 | clear_opt(sb, DISCARD); |
5328e635 | 1803 | break; |
744692dc | 1804 | case Opt_dioread_nolock: |
fd8c37ec | 1805 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1806 | break; |
1807 | case Opt_dioread_lock: | |
fd8c37ec | 1808 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1809 | break; |
bfff6873 | 1810 | case Opt_init_inode_table: |
fd8c37ec | 1811 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1812 | if (args[0].from) { |
1813 | if (match_int(&args[0], &option)) | |
1814 | return 0; | |
1815 | } else | |
1816 | option = EXT4_DEF_LI_WAIT_MULT; | |
1817 | if (option < 0) | |
1818 | return 0; | |
1819 | sbi->s_li_wait_mult = option; | |
1820 | break; | |
1821 | case Opt_noinit_inode_table: | |
fd8c37ec | 1822 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1823 | break; |
ac27a0ec | 1824 | default: |
b31e1552 ES |
1825 | ext4_msg(sb, KERN_ERR, |
1826 | "Unrecognized mount option \"%s\" " | |
1827 | "or missing value", p); | |
ac27a0ec DK |
1828 | return 0; |
1829 | } | |
1830 | } | |
1831 | #ifdef CONFIG_QUOTA | |
1832 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1833 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1834 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1835 | |
482a7425 | 1836 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1837 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1838 | |
56c50f11 | 1839 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1840 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1841 | "format mixing"); | |
ac27a0ec DK |
1842 | return 0; |
1843 | } | |
1844 | ||
1845 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1846 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1847 | "not specified"); | |
ac27a0ec DK |
1848 | return 0; |
1849 | } | |
1850 | } else { | |
1851 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1852 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1853 | "specified with no journaling " |
b31e1552 | 1854 | "enabled"); |
ac27a0ec DK |
1855 | return 0; |
1856 | } | |
1857 | } | |
1858 | #endif | |
1859 | return 1; | |
1860 | } | |
1861 | ||
617ba13b | 1862 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1863 | int read_only) |
1864 | { | |
617ba13b | 1865 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1866 | int res = 0; |
1867 | ||
617ba13b | 1868 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1869 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1870 | "forcing read-only mode"); | |
ac27a0ec DK |
1871 | res = MS_RDONLY; |
1872 | } | |
1873 | if (read_only) | |
1874 | return res; | |
617ba13b | 1875 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1876 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1877 | "running e2fsck is recommended"); | |
617ba13b | 1878 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1879 | ext4_msg(sb, KERN_WARNING, |
1880 | "warning: mounting fs with errors, " | |
1881 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1882 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1883 | le16_to_cpu(es->s_mnt_count) >= | |
1884 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1885 | ext4_msg(sb, KERN_WARNING, |
1886 | "warning: maximal mount count reached, " | |
1887 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1888 | else if (le32_to_cpu(es->s_checkinterval) && |
1889 | (le32_to_cpu(es->s_lastcheck) + | |
1890 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1891 | ext4_msg(sb, KERN_WARNING, |
1892 | "warning: checktime reached, " | |
1893 | "running e2fsck is recommended"); | |
0b8e58a1 | 1894 | if (!sbi->s_journal) |
0390131b | 1895 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1896 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1897 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1898 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1899 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1900 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1901 | if (sbi->s_journal) |
1902 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1903 | |
e2d67052 | 1904 | ext4_commit_super(sb, 1); |
ac27a0ec | 1905 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1906 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1907 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1908 | sb->s_blocksize, |
1909 | sbi->s_groups_count, | |
617ba13b MC |
1910 | EXT4_BLOCKS_PER_GROUP(sb), |
1911 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1912 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1913 | |
ac27a0ec DK |
1914 | return res; |
1915 | } | |
1916 | ||
772cb7c8 JS |
1917 | static int ext4_fill_flex_info(struct super_block *sb) |
1918 | { | |
1919 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1920 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1921 | ext4_group_t flex_group_count; |
1922 | ext4_group_t flex_group; | |
1923 | int groups_per_flex = 0; | |
c5ca7c76 | 1924 | size_t size; |
772cb7c8 JS |
1925 | int i; |
1926 | ||
503358ae TT |
1927 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1928 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1929 | ||
1930 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1931 | sbi->s_log_groups_per_flex = 0; |
1932 | return 1; | |
1933 | } | |
1934 | ||
c62a11fd FB |
1935 | /* We allocate both existing and potentially added groups */ |
1936 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1937 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1938 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1939 | size = flex_group_count * sizeof(struct flex_groups); |
1940 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1941 | if (sbi->s_flex_groups == NULL) { | |
94de56ab JP |
1942 | sbi->s_flex_groups = vzalloc(size); |
1943 | if (sbi->s_flex_groups == NULL) { | |
1944 | ext4_msg(sb, KERN_ERR, | |
1945 | "not enough memory for %u flex groups", | |
1946 | flex_group_count); | |
1947 | goto failed; | |
1948 | } | |
772cb7c8 | 1949 | } |
772cb7c8 | 1950 | |
772cb7c8 | 1951 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1952 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1953 | |
1954 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1955 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1956 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1957 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1958 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1959 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1960 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1961 | } |
1962 | ||
1963 | return 1; | |
1964 | failed: | |
1965 | return 0; | |
1966 | } | |
1967 | ||
717d50e4 AD |
1968 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1969 | struct ext4_group_desc *gdp) | |
1970 | { | |
1971 | __u16 crc = 0; | |
1972 | ||
1973 | if (sbi->s_es->s_feature_ro_compat & | |
1974 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1975 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1976 | __le32 le_group = cpu_to_le32(block_group); | |
1977 | ||
1978 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1979 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1980 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1981 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1982 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1983 | if ((sbi->s_es->s_feature_incompat & | |
1984 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1985 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1986 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1987 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1988 | offset); | |
1989 | } | |
1990 | ||
1991 | return cpu_to_le16(crc); | |
1992 | } | |
1993 | ||
1994 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1995 | struct ext4_group_desc *gdp) | |
1996 | { | |
1997 | if ((sbi->s_es->s_feature_ro_compat & | |
1998 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1999 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2000 | return 0; | |
2001 | ||
2002 | return 1; | |
2003 | } | |
2004 | ||
ac27a0ec | 2005 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2006 | static int ext4_check_descriptors(struct super_block *sb, |
2007 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2008 | { |
617ba13b MC |
2009 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2010 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2011 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2012 | ext4_fsblk_t block_bitmap; |
2013 | ext4_fsblk_t inode_bitmap; | |
2014 | ext4_fsblk_t inode_table; | |
ce421581 | 2015 | int flexbg_flag = 0; |
bfff6873 | 2016 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2017 | |
ce421581 JS |
2018 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2019 | flexbg_flag = 1; | |
2020 | ||
af5bc92d | 2021 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2022 | |
197cd65a AM |
2023 | for (i = 0; i < sbi->s_groups_count; i++) { |
2024 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2025 | ||
ce421581 | 2026 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2027 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2028 | else |
2029 | last_block = first_block + | |
617ba13b | 2030 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2031 | |
bfff6873 LC |
2032 | if ((grp == sbi->s_groups_count) && |
2033 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2034 | grp = i; | |
2035 | ||
8fadc143 | 2036 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2037 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2038 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2039 | "Block bitmap for group %u not in group " |
b31e1552 | 2040 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2041 | return 0; |
2042 | } | |
8fadc143 | 2043 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2044 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2045 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2046 | "Inode bitmap for group %u not in group " |
b31e1552 | 2047 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2048 | return 0; |
2049 | } | |
8fadc143 | 2050 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2051 | if (inode_table < first_block || |
2b2d6d01 | 2052 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2053 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2054 | "Inode table for group %u not in group " |
b31e1552 | 2055 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2056 | return 0; |
2057 | } | |
955ce5f5 | 2058 | ext4_lock_group(sb, i); |
717d50e4 | 2059 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2060 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2061 | "Checksum for group %u failed (%u!=%u)", | |
2062 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2063 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2064 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2065 | ext4_unlock_group(sb, i); |
8a266467 | 2066 | return 0; |
7ee1ec4c | 2067 | } |
717d50e4 | 2068 | } |
955ce5f5 | 2069 | ext4_unlock_group(sb, i); |
ce421581 JS |
2070 | if (!flexbg_flag) |
2071 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2072 | } |
bfff6873 LC |
2073 | if (NULL != first_not_zeroed) |
2074 | *first_not_zeroed = grp; | |
ac27a0ec | 2075 | |
bd81d8ee | 2076 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 2077 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2078 | return 1; |
2079 | } | |
2080 | ||
617ba13b | 2081 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2082 | * the superblock) which were deleted from all directories, but held open by |
2083 | * a process at the time of a crash. We walk the list and try to delete these | |
2084 | * inodes at recovery time (only with a read-write filesystem). | |
2085 | * | |
2086 | * In order to keep the orphan inode chain consistent during traversal (in | |
2087 | * case of crash during recovery), we link each inode into the superblock | |
2088 | * orphan list_head and handle it the same way as an inode deletion during | |
2089 | * normal operation (which journals the operations for us). | |
2090 | * | |
2091 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2092 | * accidentally point at an in-use or already deleted inode. The worst that | |
2093 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2094 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2095 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2096 | * inode cleanup for us, so we can safely abort without any further action. | |
2097 | */ | |
2b2d6d01 TT |
2098 | static void ext4_orphan_cleanup(struct super_block *sb, |
2099 | struct ext4_super_block *es) | |
ac27a0ec DK |
2100 | { |
2101 | unsigned int s_flags = sb->s_flags; | |
2102 | int nr_orphans = 0, nr_truncates = 0; | |
2103 | #ifdef CONFIG_QUOTA | |
2104 | int i; | |
2105 | #endif | |
2106 | if (!es->s_last_orphan) { | |
2107 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2108 | return; | |
2109 | } | |
2110 | ||
a8f48a95 | 2111 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2112 | ext4_msg(sb, KERN_ERR, "write access " |
2113 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2114 | return; |
2115 | } | |
2116 | ||
617ba13b | 2117 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2118 | if (es->s_last_orphan) |
2119 | jbd_debug(1, "Errors on filesystem, " | |
2120 | "clearing orphan list.\n"); | |
2121 | es->s_last_orphan = 0; | |
2122 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2123 | return; | |
2124 | } | |
2125 | ||
2126 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2127 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2128 | sb->s_flags &= ~MS_RDONLY; |
2129 | } | |
2130 | #ifdef CONFIG_QUOTA | |
2131 | /* Needed for iput() to work correctly and not trash data */ | |
2132 | sb->s_flags |= MS_ACTIVE; | |
2133 | /* Turn on quotas so that they are updated correctly */ | |
2134 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2135 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2136 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2137 | if (ret < 0) |
b31e1552 ES |
2138 | ext4_msg(sb, KERN_ERR, |
2139 | "Cannot turn on journaled " | |
2140 | "quota: error %d", ret); | |
ac27a0ec DK |
2141 | } |
2142 | } | |
2143 | #endif | |
2144 | ||
2145 | while (es->s_last_orphan) { | |
2146 | struct inode *inode; | |
2147 | ||
97bd42b9 JB |
2148 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2149 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2150 | es->s_last_orphan = 0; |
2151 | break; | |
2152 | } | |
2153 | ||
617ba13b | 2154 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2155 | dquot_initialize(inode); |
ac27a0ec | 2156 | if (inode->i_nlink) { |
b31e1552 ES |
2157 | ext4_msg(sb, KERN_DEBUG, |
2158 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2159 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2160 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2161 | inode->i_ino, inode->i_size); |
617ba13b | 2162 | ext4_truncate(inode); |
ac27a0ec DK |
2163 | nr_truncates++; |
2164 | } else { | |
b31e1552 ES |
2165 | ext4_msg(sb, KERN_DEBUG, |
2166 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2167 | __func__, inode->i_ino); |
ac27a0ec DK |
2168 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2169 | inode->i_ino); | |
2170 | nr_orphans++; | |
2171 | } | |
2172 | iput(inode); /* The delete magic happens here! */ | |
2173 | } | |
2174 | ||
2b2d6d01 | 2175 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2176 | |
2177 | if (nr_orphans) | |
b31e1552 ES |
2178 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2179 | PLURAL(nr_orphans)); | |
ac27a0ec | 2180 | if (nr_truncates) |
b31e1552 ES |
2181 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2182 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2183 | #ifdef CONFIG_QUOTA |
2184 | /* Turn quotas off */ | |
2185 | for (i = 0; i < MAXQUOTAS; i++) { | |
2186 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2187 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2188 | } |
2189 | #endif | |
2190 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2191 | } | |
0b8e58a1 | 2192 | |
cd2291a4 ES |
2193 | /* |
2194 | * Maximal extent format file size. | |
2195 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2196 | * extent format containers, within a sector_t, and within i_blocks | |
2197 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2198 | * so that won't be a limiting factor. | |
2199 | * | |
2200 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2201 | */ | |
f287a1a5 | 2202 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2203 | { |
2204 | loff_t res; | |
2205 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2206 | ||
2207 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2208 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2209 | /* |
90c699a9 | 2210 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2211 | * i_block represent total blocks in 512 bytes |
2212 | * 32 == size of vfs inode i_blocks * 8 | |
2213 | */ | |
2214 | upper_limit = (1LL << 32) - 1; | |
2215 | ||
2216 | /* total blocks in file system block size */ | |
2217 | upper_limit >>= (blkbits - 9); | |
2218 | upper_limit <<= blkbits; | |
2219 | } | |
2220 | ||
2221 | /* 32-bit extent-start container, ee_block */ | |
2222 | res = 1LL << 32; | |
2223 | res <<= blkbits; | |
2224 | res -= 1; | |
2225 | ||
2226 | /* Sanity check against vm- & vfs- imposed limits */ | |
2227 | if (res > upper_limit) | |
2228 | res = upper_limit; | |
2229 | ||
2230 | return res; | |
2231 | } | |
ac27a0ec | 2232 | |
ac27a0ec | 2233 | /* |
cd2291a4 | 2234 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2235 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2236 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2237 | */ |
f287a1a5 | 2238 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2239 | { |
617ba13b | 2240 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2241 | int meta_blocks; |
2242 | loff_t upper_limit; | |
0b8e58a1 AD |
2243 | /* This is calculated to be the largest file size for a dense, block |
2244 | * mapped file such that the file's total number of 512-byte sectors, | |
2245 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2246 | * | |
2247 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2248 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2249 | */ |
2250 | ||
f287a1a5 | 2251 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2252 | /* |
90c699a9 | 2253 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2254 | * the inode i_block field represents total file blocks in |
2255 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2256 | */ |
2257 | upper_limit = (1LL << 32) - 1; | |
2258 | ||
2259 | /* total blocks in file system block size */ | |
2260 | upper_limit >>= (bits - 9); | |
2261 | ||
2262 | } else { | |
8180a562 AK |
2263 | /* |
2264 | * We use 48 bit ext4_inode i_blocks | |
2265 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2266 | * represent total number of blocks in | |
2267 | * file system block size | |
2268 | */ | |
0fc1b451 AK |
2269 | upper_limit = (1LL << 48) - 1; |
2270 | ||
0fc1b451 AK |
2271 | } |
2272 | ||
2273 | /* indirect blocks */ | |
2274 | meta_blocks = 1; | |
2275 | /* double indirect blocks */ | |
2276 | meta_blocks += 1 + (1LL << (bits-2)); | |
2277 | /* tripple indirect blocks */ | |
2278 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2279 | ||
2280 | upper_limit -= meta_blocks; | |
2281 | upper_limit <<= bits; | |
ac27a0ec DK |
2282 | |
2283 | res += 1LL << (bits-2); | |
2284 | res += 1LL << (2*(bits-2)); | |
2285 | res += 1LL << (3*(bits-2)); | |
2286 | res <<= bits; | |
2287 | if (res > upper_limit) | |
2288 | res = upper_limit; | |
0fc1b451 AK |
2289 | |
2290 | if (res > MAX_LFS_FILESIZE) | |
2291 | res = MAX_LFS_FILESIZE; | |
2292 | ||
ac27a0ec DK |
2293 | return res; |
2294 | } | |
2295 | ||
617ba13b | 2296 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2297 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2298 | { |
617ba13b | 2299 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2300 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2301 | int has_super = 0; |
2302 | ||
2303 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2304 | ||
617ba13b | 2305 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2306 | nr < first_meta_bg) |
70bbb3e0 | 2307 | return logical_sb_block + nr + 1; |
ac27a0ec | 2308 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2309 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2310 | has_super = 1; |
0b8e58a1 | 2311 | |
617ba13b | 2312 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2313 | } |
2314 | ||
c9de560d AT |
2315 | /** |
2316 | * ext4_get_stripe_size: Get the stripe size. | |
2317 | * @sbi: In memory super block info | |
2318 | * | |
2319 | * If we have specified it via mount option, then | |
2320 | * use the mount option value. If the value specified at mount time is | |
2321 | * greater than the blocks per group use the super block value. | |
2322 | * If the super block value is greater than blocks per group return 0. | |
2323 | * Allocator needs it be less than blocks per group. | |
2324 | * | |
2325 | */ | |
2326 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2327 | { | |
2328 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2329 | unsigned long stripe_width = | |
2330 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2331 | ||
2332 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2333 | return sbi->s_stripe; | |
2334 | ||
2335 | if (stripe_width <= sbi->s_blocks_per_group) | |
2336 | return stripe_width; | |
2337 | ||
2338 | if (stride <= sbi->s_blocks_per_group) | |
2339 | return stride; | |
2340 | ||
2341 | return 0; | |
2342 | } | |
ac27a0ec | 2343 | |
3197ebdb TT |
2344 | /* sysfs supprt */ |
2345 | ||
2346 | struct ext4_attr { | |
2347 | struct attribute attr; | |
2348 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2349 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2350 | const char *, size_t); |
2351 | int offset; | |
2352 | }; | |
2353 | ||
2354 | static int parse_strtoul(const char *buf, | |
2355 | unsigned long max, unsigned long *value) | |
2356 | { | |
2357 | char *endp; | |
2358 | ||
e7d2860b AGR |
2359 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2360 | endp = skip_spaces(endp); | |
3197ebdb TT |
2361 | if (*endp || *value > max) |
2362 | return -EINVAL; | |
2363 | ||
2364 | return 0; | |
2365 | } | |
2366 | ||
2367 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2368 | struct ext4_sb_info *sbi, | |
2369 | char *buf) | |
2370 | { | |
2371 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2372 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2373 | } | |
2374 | ||
2375 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2376 | struct ext4_sb_info *sbi, char *buf) | |
2377 | { | |
2378 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2379 | ||
f613dfcb TT |
2380 | if (!sb->s_bdev->bd_part) |
2381 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2382 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2383 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2384 | sbi->s_sectors_written_start) >> 1); | |
2385 | } | |
2386 | ||
2387 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2388 | struct ext4_sb_info *sbi, char *buf) | |
2389 | { | |
2390 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2391 | ||
f613dfcb TT |
2392 | if (!sb->s_bdev->bd_part) |
2393 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2394 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2395 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2396 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2397 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2398 | } |
2399 | ||
2400 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2401 | struct ext4_sb_info *sbi, | |
2402 | const char *buf, size_t count) | |
2403 | { | |
2404 | unsigned long t; | |
2405 | ||
2406 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2407 | return -EINVAL; | |
2408 | ||
f7c43950 | 2409 | if (!is_power_of_2(t)) |
3197ebdb TT |
2410 | return -EINVAL; |
2411 | ||
2412 | sbi->s_inode_readahead_blks = t; | |
2413 | return count; | |
2414 | } | |
2415 | ||
2416 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2417 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2418 | { |
2419 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2420 | ||
2421 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2422 | } | |
2423 | ||
2424 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2425 | struct ext4_sb_info *sbi, | |
2426 | const char *buf, size_t count) | |
2427 | { | |
2428 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2429 | unsigned long t; | |
2430 | ||
2431 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2432 | return -EINVAL; | |
2433 | *ui = t; | |
2434 | return count; | |
2435 | } | |
2436 | ||
2437 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2438 | static struct ext4_attr ext4_attr_##_name = { \ | |
2439 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2440 | .show = _show, \ | |
2441 | .store = _store, \ | |
2442 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2443 | } | |
2444 | #define EXT4_ATTR(name, mode, show, store) \ | |
2445 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2446 | ||
857ac889 | 2447 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2448 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2449 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2450 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2451 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2452 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2453 | ||
2454 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2455 | EXT4_RO_ATTR(session_write_kbytes); | |
2456 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2457 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2458 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2459 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2460 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2461 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2462 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2463 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2464 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2465 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2466 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2467 | |
2468 | static struct attribute *ext4_attrs[] = { | |
2469 | ATTR_LIST(delayed_allocation_blocks), | |
2470 | ATTR_LIST(session_write_kbytes), | |
2471 | ATTR_LIST(lifetime_write_kbytes), | |
2472 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2473 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2474 | ATTR_LIST(mb_stats), |
2475 | ATTR_LIST(mb_max_to_scan), | |
2476 | ATTR_LIST(mb_min_to_scan), | |
2477 | ATTR_LIST(mb_order2_req), | |
2478 | ATTR_LIST(mb_stream_req), | |
2479 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2480 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2481 | NULL, |
2482 | }; | |
2483 | ||
857ac889 LC |
2484 | /* Features this copy of ext4 supports */ |
2485 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2486 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2487 | |
2488 | static struct attribute *ext4_feat_attrs[] = { | |
2489 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2490 | ATTR_LIST(batched_discard), |
857ac889 LC |
2491 | NULL, |
2492 | }; | |
2493 | ||
3197ebdb TT |
2494 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2495 | struct attribute *attr, char *buf) | |
2496 | { | |
2497 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2498 | s_kobj); | |
2499 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2500 | ||
2501 | return a->show ? a->show(a, sbi, buf) : 0; | |
2502 | } | |
2503 | ||
2504 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2505 | struct attribute *attr, | |
2506 | const char *buf, size_t len) | |
2507 | { | |
2508 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2509 | s_kobj); | |
2510 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2511 | ||
2512 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2513 | } | |
2514 | ||
2515 | static void ext4_sb_release(struct kobject *kobj) | |
2516 | { | |
2517 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2518 | s_kobj); | |
2519 | complete(&sbi->s_kobj_unregister); | |
2520 | } | |
2521 | ||
52cf25d0 | 2522 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2523 | .show = ext4_attr_show, |
2524 | .store = ext4_attr_store, | |
2525 | }; | |
2526 | ||
2527 | static struct kobj_type ext4_ktype = { | |
2528 | .default_attrs = ext4_attrs, | |
2529 | .sysfs_ops = &ext4_attr_ops, | |
2530 | .release = ext4_sb_release, | |
2531 | }; | |
2532 | ||
857ac889 LC |
2533 | static void ext4_feat_release(struct kobject *kobj) |
2534 | { | |
2535 | complete(&ext4_feat->f_kobj_unregister); | |
2536 | } | |
2537 | ||
2538 | static struct kobj_type ext4_feat_ktype = { | |
2539 | .default_attrs = ext4_feat_attrs, | |
2540 | .sysfs_ops = &ext4_attr_ops, | |
2541 | .release = ext4_feat_release, | |
2542 | }; | |
2543 | ||
a13fb1a4 ES |
2544 | /* |
2545 | * Check whether this filesystem can be mounted based on | |
2546 | * the features present and the RDONLY/RDWR mount requested. | |
2547 | * Returns 1 if this filesystem can be mounted as requested, | |
2548 | * 0 if it cannot be. | |
2549 | */ | |
2550 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2551 | { | |
2552 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2553 | ext4_msg(sb, KERN_ERR, | |
2554 | "Couldn't mount because of " | |
2555 | "unsupported optional features (%x)", | |
2556 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2557 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | if (readonly) | |
2562 | return 1; | |
2563 | ||
2564 | /* Check that feature set is OK for a read-write mount */ | |
2565 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2566 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2567 | "unsupported optional features (%x)", | |
2568 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2569 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2570 | return 0; | |
2571 | } | |
2572 | /* | |
2573 | * Large file size enabled file system can only be mounted | |
2574 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2575 | */ | |
2576 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2577 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2578 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2579 | "cannot be mounted RDWR without " | |
2580 | "CONFIG_LBDAF"); | |
2581 | return 0; | |
2582 | } | |
2583 | } | |
2584 | return 1; | |
2585 | } | |
2586 | ||
66e61a9e TT |
2587 | /* |
2588 | * This function is called once a day if we have errors logged | |
2589 | * on the file system | |
2590 | */ | |
2591 | static void print_daily_error_info(unsigned long arg) | |
2592 | { | |
2593 | struct super_block *sb = (struct super_block *) arg; | |
2594 | struct ext4_sb_info *sbi; | |
2595 | struct ext4_super_block *es; | |
2596 | ||
2597 | sbi = EXT4_SB(sb); | |
2598 | es = sbi->s_es; | |
2599 | ||
2600 | if (es->s_error_count) | |
2601 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2602 | le32_to_cpu(es->s_error_count)); | |
2603 | if (es->s_first_error_time) { | |
2604 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2605 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2606 | (int) sizeof(es->s_first_error_func), | |
2607 | es->s_first_error_func, | |
2608 | le32_to_cpu(es->s_first_error_line)); | |
2609 | if (es->s_first_error_ino) | |
2610 | printk(": inode %u", | |
2611 | le32_to_cpu(es->s_first_error_ino)); | |
2612 | if (es->s_first_error_block) | |
2613 | printk(": block %llu", (unsigned long long) | |
2614 | le64_to_cpu(es->s_first_error_block)); | |
2615 | printk("\n"); | |
2616 | } | |
2617 | if (es->s_last_error_time) { | |
2618 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2619 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2620 | (int) sizeof(es->s_last_error_func), | |
2621 | es->s_last_error_func, | |
2622 | le32_to_cpu(es->s_last_error_line)); | |
2623 | if (es->s_last_error_ino) | |
2624 | printk(": inode %u", | |
2625 | le32_to_cpu(es->s_last_error_ino)); | |
2626 | if (es->s_last_error_block) | |
2627 | printk(": block %llu", (unsigned long long) | |
2628 | le64_to_cpu(es->s_last_error_block)); | |
2629 | printk("\n"); | |
2630 | } | |
2631 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2632 | } | |
2633 | ||
bfff6873 LC |
2634 | static void ext4_lazyinode_timeout(unsigned long data) |
2635 | { | |
2636 | struct task_struct *p = (struct task_struct *)data; | |
2637 | wake_up_process(p); | |
2638 | } | |
2639 | ||
2640 | /* Find next suitable group and run ext4_init_inode_table */ | |
2641 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2642 | { | |
2643 | struct ext4_group_desc *gdp = NULL; | |
2644 | ext4_group_t group, ngroups; | |
2645 | struct super_block *sb; | |
2646 | unsigned long timeout = 0; | |
2647 | int ret = 0; | |
2648 | ||
2649 | sb = elr->lr_super; | |
2650 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2651 | ||
2652 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2653 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2654 | if (!gdp) { | |
2655 | ret = 1; | |
2656 | break; | |
2657 | } | |
2658 | ||
2659 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2660 | break; | |
2661 | } | |
2662 | ||
2663 | if (group == ngroups) | |
2664 | ret = 1; | |
2665 | ||
2666 | if (!ret) { | |
2667 | timeout = jiffies; | |
2668 | ret = ext4_init_inode_table(sb, group, | |
2669 | elr->lr_timeout ? 0 : 1); | |
2670 | if (elr->lr_timeout == 0) { | |
2671 | timeout = jiffies - timeout; | |
2672 | if (elr->lr_sbi->s_li_wait_mult) | |
2673 | timeout *= elr->lr_sbi->s_li_wait_mult; | |
2674 | else | |
2675 | timeout *= 20; | |
2676 | elr->lr_timeout = timeout; | |
2677 | } | |
2678 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2679 | elr->lr_next_group = group + 1; | |
2680 | } | |
2681 | ||
2682 | return ret; | |
2683 | } | |
2684 | ||
2685 | /* | |
2686 | * Remove lr_request from the list_request and free the | |
2687 | * request tructure. Should be called with li_list_mtx held | |
2688 | */ | |
2689 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2690 | { | |
2691 | struct ext4_sb_info *sbi; | |
2692 | ||
2693 | if (!elr) | |
2694 | return; | |
2695 | ||
2696 | sbi = elr->lr_sbi; | |
2697 | ||
2698 | list_del(&elr->lr_request); | |
2699 | sbi->s_li_request = NULL; | |
2700 | kfree(elr); | |
2701 | } | |
2702 | ||
2703 | static void ext4_unregister_li_request(struct super_block *sb) | |
2704 | { | |
2705 | struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; | |
2706 | ||
2707 | if (!ext4_li_info) | |
2708 | return; | |
2709 | ||
2710 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2711 | ext4_remove_li_request(elr); | |
2712 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2713 | } | |
2714 | ||
2715 | /* | |
2716 | * This is the function where ext4lazyinit thread lives. It walks | |
2717 | * through the request list searching for next scheduled filesystem. | |
2718 | * When such a fs is found, run the lazy initialization request | |
2719 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2720 | * function. Based on that time we compute next schedule time of | |
2721 | * the request. When walking through the list is complete, compute | |
2722 | * next waking time and put itself into sleep. | |
2723 | */ | |
2724 | static int ext4_lazyinit_thread(void *arg) | |
2725 | { | |
2726 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2727 | struct list_head *pos, *n; | |
2728 | struct ext4_li_request *elr; | |
2729 | unsigned long next_wakeup; | |
2730 | DEFINE_WAIT(wait); | |
bfff6873 LC |
2731 | |
2732 | BUG_ON(NULL == eli); | |
2733 | ||
2734 | eli->li_timer.data = (unsigned long)current; | |
2735 | eli->li_timer.function = ext4_lazyinode_timeout; | |
2736 | ||
2737 | eli->li_task = current; | |
2738 | wake_up(&eli->li_wait_task); | |
2739 | ||
2740 | cont_thread: | |
2741 | while (true) { | |
2742 | next_wakeup = MAX_JIFFY_OFFSET; | |
2743 | ||
2744 | mutex_lock(&eli->li_list_mtx); | |
2745 | if (list_empty(&eli->li_request_list)) { | |
2746 | mutex_unlock(&eli->li_list_mtx); | |
2747 | goto exit_thread; | |
2748 | } | |
2749 | ||
2750 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2751 | elr = list_entry(pos, struct ext4_li_request, | |
2752 | lr_request); | |
2753 | ||
b2c78cd0 TT |
2754 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2755 | if (ext4_run_li_request(elr) != 0) { | |
2756 | /* error, remove the lazy_init job */ | |
2757 | ext4_remove_li_request(elr); | |
2758 | continue; | |
2759 | } | |
bfff6873 LC |
2760 | } |
2761 | ||
2762 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2763 | next_wakeup = elr->lr_next_sched; | |
2764 | } | |
2765 | mutex_unlock(&eli->li_list_mtx); | |
2766 | ||
2767 | if (freezing(current)) | |
2768 | refrigerator(); | |
2769 | ||
f4245bd4 LC |
2770 | if ((time_after_eq(jiffies, next_wakeup)) || |
2771 | (MAX_JIFFY_OFFSET == next_wakeup)) { | |
bfff6873 LC |
2772 | cond_resched(); |
2773 | continue; | |
2774 | } | |
2775 | ||
2776 | eli->li_timer.expires = next_wakeup; | |
2777 | add_timer(&eli->li_timer); | |
2778 | prepare_to_wait(&eli->li_wait_daemon, &wait, | |
2779 | TASK_INTERRUPTIBLE); | |
2780 | if (time_before(jiffies, next_wakeup)) | |
2781 | schedule(); | |
2782 | finish_wait(&eli->li_wait_daemon, &wait); | |
2783 | } | |
2784 | ||
2785 | exit_thread: | |
2786 | /* | |
2787 | * It looks like the request list is empty, but we need | |
2788 | * to check it under the li_list_mtx lock, to prevent any | |
2789 | * additions into it, and of course we should lock ext4_li_mtx | |
2790 | * to atomically free the list and ext4_li_info, because at | |
2791 | * this point another ext4 filesystem could be registering | |
2792 | * new one. | |
2793 | */ | |
2794 | mutex_lock(&ext4_li_mtx); | |
2795 | mutex_lock(&eli->li_list_mtx); | |
2796 | if (!list_empty(&eli->li_request_list)) { | |
2797 | mutex_unlock(&eli->li_list_mtx); | |
2798 | mutex_unlock(&ext4_li_mtx); | |
2799 | goto cont_thread; | |
2800 | } | |
2801 | mutex_unlock(&eli->li_list_mtx); | |
2802 | del_timer_sync(&ext4_li_info->li_timer); | |
2803 | eli->li_task = NULL; | |
2804 | wake_up(&eli->li_wait_task); | |
2805 | ||
2806 | kfree(ext4_li_info); | |
2807 | ext4_li_info = NULL; | |
2808 | mutex_unlock(&ext4_li_mtx); | |
2809 | ||
2810 | return 0; | |
2811 | } | |
2812 | ||
2813 | static void ext4_clear_request_list(void) | |
2814 | { | |
2815 | struct list_head *pos, *n; | |
2816 | struct ext4_li_request *elr; | |
2817 | ||
2818 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2819 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2820 | elr = list_entry(pos, struct ext4_li_request, | |
2821 | lr_request); | |
2822 | ext4_remove_li_request(elr); | |
2823 | } | |
2824 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2825 | } | |
2826 | ||
2827 | static int ext4_run_lazyinit_thread(void) | |
2828 | { | |
2829 | struct task_struct *t; | |
2830 | ||
2831 | t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); | |
2832 | if (IS_ERR(t)) { | |
2833 | int err = PTR_ERR(t); | |
2834 | ext4_clear_request_list(); | |
2835 | del_timer_sync(&ext4_li_info->li_timer); | |
2836 | kfree(ext4_li_info); | |
2837 | ext4_li_info = NULL; | |
2838 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2839 | "initialization thread\n", | |
2840 | err); | |
2841 | return err; | |
2842 | } | |
2843 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
2844 | ||
2845 | wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); | |
2846 | return 0; | |
2847 | } | |
2848 | ||
2849 | /* | |
2850 | * Check whether it make sense to run itable init. thread or not. | |
2851 | * If there is at least one uninitialized inode table, return | |
2852 | * corresponding group number, else the loop goes through all | |
2853 | * groups and return total number of groups. | |
2854 | */ | |
2855 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2856 | { | |
2857 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2858 | struct ext4_group_desc *gdp = NULL; | |
2859 | ||
2860 | for (group = 0; group < ngroups; group++) { | |
2861 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2862 | if (!gdp) | |
2863 | continue; | |
2864 | ||
2865 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2866 | break; | |
2867 | } | |
2868 | ||
2869 | return group; | |
2870 | } | |
2871 | ||
2872 | static int ext4_li_info_new(void) | |
2873 | { | |
2874 | struct ext4_lazy_init *eli = NULL; | |
2875 | ||
2876 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2877 | if (!eli) | |
2878 | return -ENOMEM; | |
2879 | ||
2880 | eli->li_task = NULL; | |
2881 | INIT_LIST_HEAD(&eli->li_request_list); | |
2882 | mutex_init(&eli->li_list_mtx); | |
2883 | ||
2884 | init_waitqueue_head(&eli->li_wait_daemon); | |
2885 | init_waitqueue_head(&eli->li_wait_task); | |
2886 | init_timer(&eli->li_timer); | |
2887 | eli->li_state |= EXT4_LAZYINIT_QUIT; | |
2888 | ||
2889 | ext4_li_info = eli; | |
2890 | ||
2891 | return 0; | |
2892 | } | |
2893 | ||
2894 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2895 | ext4_group_t start) | |
2896 | { | |
2897 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2898 | struct ext4_li_request *elr; | |
2899 | unsigned long rnd; | |
2900 | ||
2901 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2902 | if (!elr) | |
2903 | return NULL; | |
2904 | ||
2905 | elr->lr_super = sb; | |
2906 | elr->lr_sbi = sbi; | |
2907 | elr->lr_next_group = start; | |
2908 | ||
2909 | /* | |
2910 | * Randomize first schedule time of the request to | |
2911 | * spread the inode table initialization requests | |
2912 | * better. | |
2913 | */ | |
2914 | get_random_bytes(&rnd, sizeof(rnd)); | |
2915 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2916 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2917 | ||
2918 | return elr; | |
2919 | } | |
2920 | ||
2921 | static int ext4_register_li_request(struct super_block *sb, | |
2922 | ext4_group_t first_not_zeroed) | |
2923 | { | |
2924 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2925 | struct ext4_li_request *elr; | |
2926 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
beed5ecb | 2927 | int ret; |
bfff6873 LC |
2928 | |
2929 | if (sbi->s_li_request != NULL) | |
beed5ecb | 2930 | return 0; |
bfff6873 LC |
2931 | |
2932 | if (first_not_zeroed == ngroups || | |
2933 | (sb->s_flags & MS_RDONLY) || | |
2934 | !test_opt(sb, INIT_INODE_TABLE)) { | |
2935 | sbi->s_li_request = NULL; | |
beed5ecb | 2936 | return 0; |
bfff6873 LC |
2937 | } |
2938 | ||
2939 | if (first_not_zeroed == ngroups) { | |
2940 | sbi->s_li_request = NULL; | |
beed5ecb | 2941 | return 0; |
bfff6873 LC |
2942 | } |
2943 | ||
2944 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
2945 | if (!elr) |
2946 | return -ENOMEM; | |
bfff6873 LC |
2947 | |
2948 | mutex_lock(&ext4_li_mtx); | |
2949 | ||
2950 | if (NULL == ext4_li_info) { | |
2951 | ret = ext4_li_info_new(); | |
2952 | if (ret) | |
2953 | goto out; | |
2954 | } | |
2955 | ||
2956 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2957 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2958 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2959 | ||
2960 | sbi->s_li_request = elr; | |
2961 | ||
2962 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2963 | ret = ext4_run_lazyinit_thread(); | |
2964 | if (ret) | |
2965 | goto out; | |
2966 | } | |
bfff6873 | 2967 | out: |
beed5ecb NK |
2968 | mutex_unlock(&ext4_li_mtx); |
2969 | if (ret) | |
bfff6873 | 2970 | kfree(elr); |
bfff6873 LC |
2971 | return ret; |
2972 | } | |
2973 | ||
2974 | /* | |
2975 | * We do not need to lock anything since this is called on | |
2976 | * module unload. | |
2977 | */ | |
2978 | static void ext4_destroy_lazyinit_thread(void) | |
2979 | { | |
2980 | /* | |
2981 | * If thread exited earlier | |
2982 | * there's nothing to be done. | |
2983 | */ | |
2984 | if (!ext4_li_info) | |
2985 | return; | |
2986 | ||
2987 | ext4_clear_request_list(); | |
2988 | ||
2989 | while (ext4_li_info->li_task) { | |
2990 | wake_up(&ext4_li_info->li_wait_daemon); | |
2991 | wait_event(ext4_li_info->li_wait_task, | |
2992 | ext4_li_info->li_task == NULL); | |
2993 | } | |
2994 | } | |
2995 | ||
2b2d6d01 | 2996 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2997 | __releases(kernel_lock) |
2998 | __acquires(kernel_lock) | |
ac27a0ec | 2999 | { |
d4c402d9 | 3000 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3001 | struct buffer_head *bh; |
617ba13b MC |
3002 | struct ext4_super_block *es = NULL; |
3003 | struct ext4_sb_info *sbi; | |
3004 | ext4_fsblk_t block; | |
3005 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3006 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3007 | unsigned long offset = 0; |
ac27a0ec DK |
3008 | unsigned long journal_devnum = 0; |
3009 | unsigned long def_mount_opts; | |
3010 | struct inode *root; | |
9f6200bb | 3011 | char *cp; |
0390131b | 3012 | const char *descr; |
dcc7dae3 | 3013 | int ret = -ENOMEM; |
ac27a0ec | 3014 | int blocksize; |
4ec11028 TT |
3015 | unsigned int db_count; |
3016 | unsigned int i; | |
f287a1a5 | 3017 | int needs_recovery, has_huge_files; |
bd81d8ee | 3018 | __u64 blocks_count; |
833f4077 | 3019 | int err; |
b3881f74 | 3020 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3021 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3022 | |
3023 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3024 | if (!sbi) | |
dcc7dae3 | 3025 | goto out_free_orig; |
705895b6 PE |
3026 | |
3027 | sbi->s_blockgroup_lock = | |
3028 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3029 | if (!sbi->s_blockgroup_lock) { | |
3030 | kfree(sbi); | |
dcc7dae3 | 3031 | goto out_free_orig; |
705895b6 | 3032 | } |
ac27a0ec DK |
3033 | sb->s_fs_info = sbi; |
3034 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3035 | sbi->s_resuid = EXT4_DEF_RESUID; |
3036 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3037 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3038 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3039 | if (sb->s_bdev->bd_part) |
3040 | sbi->s_sectors_written_start = | |
3041 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3042 | |
9f6200bb TT |
3043 | /* Cleanup superblock name */ |
3044 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3045 | *cp = '!'; | |
3046 | ||
dcc7dae3 | 3047 | ret = -EINVAL; |
617ba13b | 3048 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3049 | if (!blocksize) { |
b31e1552 | 3050 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3051 | goto out_fail; |
3052 | } | |
3053 | ||
3054 | /* | |
617ba13b | 3055 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3056 | * block sizes. We need to calculate the offset from buffer start. |
3057 | */ | |
617ba13b | 3058 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3059 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3060 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3061 | } else { |
70bbb3e0 | 3062 | logical_sb_block = sb_block; |
ac27a0ec DK |
3063 | } |
3064 | ||
70bbb3e0 | 3065 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3066 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3067 | goto out_fail; |
3068 | } | |
3069 | /* | |
3070 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3071 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3072 | */ |
617ba13b | 3073 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3074 | sbi->s_es = es; |
3075 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3076 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3077 | goto cantfind_ext4; | |
afc32f7e | 3078 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3079 | |
3080 | /* Set defaults before we parse the mount options */ | |
3081 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3082 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3083 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3084 | set_opt(sb, DEBUG); |
437ca0fd DM |
3085 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3086 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3087 | "2.6.38"); | |
fd8c37ec | 3088 | set_opt(sb, GRPID); |
437ca0fd | 3089 | } |
617ba13b | 3090 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3091 | set_opt(sb, NO_UID32); |
03010a33 | 3092 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 3093 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
fd8c37ec | 3094 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3095 | #endif |
03010a33 | 3096 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 3097 | if (def_mount_opts & EXT4_DEFM_ACL) |
fd8c37ec | 3098 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3099 | #endif |
617ba13b | 3100 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3101 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3102 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3103 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3104 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3105 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3106 | |
3107 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3108 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3109 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3110 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3111 | else |
fd8c37ec | 3112 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3113 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3114 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3115 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3116 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3117 | |
3118 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3119 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3120 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3121 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3122 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3123 | |
8b67f04a | 3124 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3125 | set_opt(sb, BARRIER); |
ac27a0ec | 3126 | |
dd919b98 AK |
3127 | /* |
3128 | * enable delayed allocation by default | |
3129 | * Use -o nodelalloc to turn it off | |
3130 | */ | |
8b67f04a TT |
3131 | if (!IS_EXT3_SB(sb) && |
3132 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3133 | set_opt(sb, DELALLOC); |
dd919b98 | 3134 | |
8b67f04a TT |
3135 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3136 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3137 | ext4_msg(sb, KERN_WARNING, | |
3138 | "failed to parse options in superblock: %s", | |
3139 | sbi->s_es->s_mount_opts); | |
3140 | } | |
b3881f74 TT |
3141 | if (!parse_options((char *) data, sb, &journal_devnum, |
3142 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3143 | goto failed_mount; |
3144 | ||
3145 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3146 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3147 | |
617ba13b MC |
3148 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3149 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3150 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3151 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3152 | ext4_msg(sb, KERN_WARNING, |
3153 | "feature flags set on rev 0 fs, " | |
3154 | "running e2fsck is recommended"); | |
469108ff | 3155 | |
ac27a0ec DK |
3156 | /* |
3157 | * Check feature flags regardless of the revision level, since we | |
3158 | * previously didn't change the revision level when setting the flags, | |
3159 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3160 | */ | |
a13fb1a4 | 3161 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3162 | goto failed_mount; |
a13fb1a4 | 3163 | |
ac27a0ec DK |
3164 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
3165 | ||
617ba13b MC |
3166 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3167 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3168 | ext4_msg(sb, KERN_ERR, |
3169 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3170 | goto failed_mount; |
3171 | } | |
3172 | ||
ac27a0ec | 3173 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3174 | /* Validate the filesystem blocksize */ |
3175 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3176 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3177 | blocksize); |
ac27a0ec DK |
3178 | goto failed_mount; |
3179 | } | |
3180 | ||
2b2d6d01 | 3181 | brelse(bh); |
70bbb3e0 AM |
3182 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3183 | offset = do_div(logical_sb_block, blocksize); | |
3184 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3185 | if (!bh) { |
b31e1552 ES |
3186 | ext4_msg(sb, KERN_ERR, |
3187 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3188 | goto failed_mount; |
3189 | } | |
617ba13b | 3190 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3191 | sbi->s_es = es; |
617ba13b | 3192 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3193 | ext4_msg(sb, KERN_ERR, |
3194 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3195 | goto failed_mount; |
3196 | } | |
3197 | } | |
3198 | ||
a13fb1a4 ES |
3199 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3200 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3201 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3202 | has_huge_files); | |
3203 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3204 | |
617ba13b MC |
3205 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3206 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3207 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3208 | } else { |
3209 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3210 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3211 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3212 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3213 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3214 | ext4_msg(sb, KERN_ERR, |
3215 | "unsupported inode size: %d", | |
2b2d6d01 | 3216 | sbi->s_inode_size); |
ac27a0ec DK |
3217 | goto failed_mount; |
3218 | } | |
ef7f3835 KS |
3219 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3220 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3221 | } |
0b8e58a1 | 3222 | |
0d1ee42f AR |
3223 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3224 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3225 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3226 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3227 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3228 | ext4_msg(sb, KERN_ERR, |
3229 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3230 | sbi->s_desc_size); |
3231 | goto failed_mount; | |
3232 | } | |
3233 | } else | |
3234 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3235 | |
ac27a0ec | 3236 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3237 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3238 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3239 | goto cantfind_ext4; |
0b8e58a1 | 3240 | |
617ba13b | 3241 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3242 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3243 | goto cantfind_ext4; |
ac27a0ec DK |
3244 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3245 | sbi->s_inodes_per_block; | |
0d1ee42f | 3246 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3247 | sbi->s_sbh = bh; |
3248 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3249 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3250 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3251 | |
2b2d6d01 | 3252 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3253 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3254 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3255 | i = le32_to_cpu(es->s_flags); |
3256 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3257 | sbi->s_hash_unsigned = 3; | |
3258 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3259 | #ifdef __CHAR_UNSIGNED__ | |
3260 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3261 | sbi->s_hash_unsigned = 3; | |
3262 | #else | |
3263 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3264 | #endif | |
3265 | sb->s_dirt = 1; | |
3266 | } | |
ac27a0ec DK |
3267 | |
3268 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
3269 | ext4_msg(sb, KERN_ERR, |
3270 | "#blocks per group too big: %lu", | |
2b2d6d01 | 3271 | sbi->s_blocks_per_group); |
ac27a0ec DK |
3272 | goto failed_mount; |
3273 | } | |
ac27a0ec | 3274 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3275 | ext4_msg(sb, KERN_ERR, |
3276 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3277 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3278 | goto failed_mount; |
3279 | } | |
3280 | ||
bf43d84b ES |
3281 | /* |
3282 | * Test whether we have more sectors than will fit in sector_t, | |
3283 | * and whether the max offset is addressable by the page cache. | |
3284 | */ | |
5a9ae68a | 3285 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3286 | ext4_blocks_count(es)); |
5a9ae68a | 3287 | if (err) { |
b31e1552 | 3288 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3289 | " too large to mount safely on this system"); |
ac27a0ec | 3290 | if (sizeof(sector_t) < 8) |
90c699a9 | 3291 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3292 | ret = err; |
ac27a0ec DK |
3293 | goto failed_mount; |
3294 | } | |
3295 | ||
617ba13b MC |
3296 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3297 | goto cantfind_ext4; | |
e7c95593 | 3298 | |
0f2ddca6 FTN |
3299 | /* check blocks count against device size */ |
3300 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3301 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3302 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3303 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3304 | ext4_blocks_count(es), blocks_count); |
3305 | goto failed_mount; | |
3306 | } | |
3307 | ||
0b8e58a1 AD |
3308 | /* |
3309 | * It makes no sense for the first data block to be beyond the end | |
3310 | * of the filesystem. | |
3311 | */ | |
3312 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3313 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3314 | "block %u is beyond end of filesystem (%llu)", | |
3315 | le32_to_cpu(es->s_first_data_block), | |
3316 | ext4_blocks_count(es)); | |
e7c95593 ES |
3317 | goto failed_mount; |
3318 | } | |
bd81d8ee LV |
3319 | blocks_count = (ext4_blocks_count(es) - |
3320 | le32_to_cpu(es->s_first_data_block) + | |
3321 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3322 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3323 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3324 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3325 | "(block count %llu, first data block %u, " |
b31e1552 | 3326 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3327 | ext4_blocks_count(es), |
3328 | le32_to_cpu(es->s_first_data_block), | |
3329 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3330 | goto failed_mount; | |
3331 | } | |
bd81d8ee | 3332 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3333 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3334 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3335 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3336 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 3337 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
3338 | GFP_KERNEL); |
3339 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 3340 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3341 | goto failed_mount; |
3342 | } | |
3343 | ||
3244fcb1 | 3344 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
3345 | if (ext4_proc_root) |
3346 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 3347 | #endif |
240799cd | 3348 | |
705895b6 | 3349 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3350 | |
3351 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3352 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3353 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3354 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3355 | ext4_msg(sb, KERN_ERR, |
3356 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3357 | db_count = i; |
3358 | goto failed_mount2; | |
3359 | } | |
3360 | } | |
bfff6873 | 3361 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3362 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3363 | goto failed_mount2; |
3364 | } | |
772cb7c8 JS |
3365 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3366 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3367 | ext4_msg(sb, KERN_ERR, |
3368 | "unable to initialize " | |
3369 | "flex_bg meta info!"); | |
772cb7c8 JS |
3370 | goto failed_mount2; |
3371 | } | |
3372 | ||
ac27a0ec DK |
3373 | sbi->s_gdb_count = db_count; |
3374 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3375 | spin_lock_init(&sbi->s_next_gen_lock); | |
3376 | ||
ce7e010a TT |
3377 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
3378 | ext4_count_free_blocks(sb)); | |
3379 | if (!err) { | |
3380 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3381 | ext4_count_free_inodes(sb)); | |
3382 | } | |
3383 | if (!err) { | |
3384 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3385 | ext4_count_dirs(sb)); | |
3386 | } | |
3387 | if (!err) { | |
3388 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
3389 | } | |
3390 | if (err) { | |
3391 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3392 | goto failed_mount3; | |
3393 | } | |
3394 | ||
c9de560d | 3395 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3396 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3397 | |
ac27a0ec DK |
3398 | /* |
3399 | * set up enough so that it can read an inode | |
3400 | */ | |
9ca92389 TT |
3401 | if (!test_opt(sb, NOLOAD) && |
3402 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3403 | sb->s_op = &ext4_sops; | |
3404 | else | |
3405 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3406 | sb->s_export_op = &ext4_export_ops; |
3407 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3408 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3409 | sb->s_qcop = &ext4_qctl_operations; |
3410 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
3411 | #endif |
3412 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 3413 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 3414 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
3415 | |
3416 | sb->s_root = NULL; | |
3417 | ||
3418 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3419 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3420 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
3421 | |
3422 | /* | |
3423 | * The first inode we look at is the journal inode. Don't try | |
3424 | * root first: it may be modified in the journal! | |
3425 | */ | |
3426 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3427 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3428 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3429 | goto failed_mount3; |
0390131b FM |
3430 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3431 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3432 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3433 | "suppressed and not mounted read-only"); | |
744692dc | 3434 | goto failed_mount_wq; |
ac27a0ec | 3435 | } else { |
fd8c37ec TT |
3436 | clear_opt(sb, DATA_FLAGS); |
3437 | set_opt(sb, WRITEBACK_DATA); | |
0390131b FM |
3438 | sbi->s_journal = NULL; |
3439 | needs_recovery = 0; | |
3440 | goto no_journal; | |
ac27a0ec DK |
3441 | } |
3442 | ||
eb40a09c JS |
3443 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3444 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3445 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3446 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3447 | goto failed_mount_wq; |
eb40a09c JS |
3448 | } |
3449 | ||
d4da6c9c LT |
3450 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3451 | jbd2_journal_set_features(sbi->s_journal, | |
3452 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3453 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3454 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3455 | jbd2_journal_set_features(sbi->s_journal, | |
3456 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3457 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3458 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3459 | } else { |
3460 | jbd2_journal_clear_features(sbi->s_journal, | |
3461 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3462 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3463 | } | |
818d276c | 3464 | |
ac27a0ec DK |
3465 | /* We have now updated the journal if required, so we can |
3466 | * validate the data journaling mode. */ | |
3467 | switch (test_opt(sb, DATA_FLAGS)) { | |
3468 | case 0: | |
3469 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3470 | * capabilities: ORDERED_DATA if the journal can |
3471 | * cope, else JOURNAL_DATA | |
3472 | */ | |
dab291af MC |
3473 | if (jbd2_journal_check_available_features |
3474 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3475 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3476 | else |
fd8c37ec | 3477 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3478 | break; |
3479 | ||
617ba13b MC |
3480 | case EXT4_MOUNT_ORDERED_DATA: |
3481 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3482 | if (!jbd2_journal_check_available_features |
3483 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3484 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3485 | "requested data journaling mode"); | |
744692dc | 3486 | goto failed_mount_wq; |
ac27a0ec DK |
3487 | } |
3488 | default: | |
3489 | break; | |
3490 | } | |
b3881f74 | 3491 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3492 | |
ce7e010a TT |
3493 | /* |
3494 | * The journal may have updated the bg summary counts, so we | |
3495 | * need to update the global counters. | |
3496 | */ | |
3497 | percpu_counter_set(&sbi->s_freeblocks_counter, | |
3498 | ext4_count_free_blocks(sb)); | |
3499 | percpu_counter_set(&sbi->s_freeinodes_counter, | |
3500 | ext4_count_free_inodes(sb)); | |
3501 | percpu_counter_set(&sbi->s_dirs_counter, | |
3502 | ext4_count_dirs(sb)); | |
3503 | percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); | |
206f7ab4 | 3504 | |
ce7e010a | 3505 | no_journal: |
4c0425ff MC |
3506 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
3507 | if (!EXT4_SB(sb)->dio_unwritten_wq) { | |
3508 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3509 | goto failed_mount_wq; | |
3510 | } | |
3511 | ||
ac27a0ec | 3512 | /* |
dab291af | 3513 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3514 | * so we can safely mount the rest of the filesystem now. |
3515 | */ | |
3516 | ||
1d1fe1ee DH |
3517 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3518 | if (IS_ERR(root)) { | |
b31e1552 | 3519 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3520 | ret = PTR_ERR(root); |
ac27a0ec DK |
3521 | goto failed_mount4; |
3522 | } | |
3523 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 3524 | iput(root); |
b31e1552 | 3525 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3526 | goto failed_mount4; |
3527 | } | |
1d1fe1ee DH |
3528 | sb->s_root = d_alloc_root(root); |
3529 | if (!sb->s_root) { | |
b31e1552 | 3530 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3531 | iput(root); |
3532 | ret = -ENOMEM; | |
3533 | goto failed_mount4; | |
3534 | } | |
ac27a0ec | 3535 | |
2b2d6d01 | 3536 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3537 | |
3538 | /* determine the minimum size of new large inodes, if present */ | |
3539 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3540 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3541 | EXT4_GOOD_OLD_INODE_SIZE; | |
3542 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3543 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3544 | if (sbi->s_want_extra_isize < | |
3545 | le16_to_cpu(es->s_want_extra_isize)) | |
3546 | sbi->s_want_extra_isize = | |
3547 | le16_to_cpu(es->s_want_extra_isize); | |
3548 | if (sbi->s_want_extra_isize < | |
3549 | le16_to_cpu(es->s_min_extra_isize)) | |
3550 | sbi->s_want_extra_isize = | |
3551 | le16_to_cpu(es->s_min_extra_isize); | |
3552 | } | |
3553 | } | |
3554 | /* Check if enough inode space is available */ | |
3555 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3556 | sbi->s_inode_size) { | |
3557 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3558 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3559 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3560 | "available"); | |
ef7f3835 KS |
3561 | } |
3562 | ||
90576c0b TT |
3563 | if (test_opt(sb, DELALLOC) && |
3564 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
3565 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
3566 | "requested data journaling mode"); | |
fd8c37ec | 3567 | clear_opt(sb, DELALLOC); |
90576c0b | 3568 | } |
744692dc JZ |
3569 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
3570 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
3571 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3572 | "option - requested data journaling mode"); | |
fd8c37ec | 3573 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3574 | } |
3575 | if (sb->s_blocksize < PAGE_SIZE) { | |
3576 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3577 | "option - block size is too small"); | |
fd8c37ec | 3578 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3579 | } |
3580 | } | |
c2774d84 | 3581 | |
6fd058f7 TT |
3582 | err = ext4_setup_system_zone(sb); |
3583 | if (err) { | |
b31e1552 | 3584 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3585 | "zone (%d)", err); |
6fd058f7 TT |
3586 | goto failed_mount4; |
3587 | } | |
3588 | ||
c2774d84 AK |
3589 | ext4_ext_init(sb); |
3590 | err = ext4_mb_init(sb, needs_recovery); | |
3591 | if (err) { | |
421f91d2 | 3592 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3593 | err); |
c2774d84 AK |
3594 | goto failed_mount4; |
3595 | } | |
3596 | ||
bfff6873 LC |
3597 | err = ext4_register_li_request(sb, first_not_zeroed); |
3598 | if (err) | |
3599 | goto failed_mount4; | |
3600 | ||
3197ebdb TT |
3601 | sbi->s_kobj.kset = ext4_kset; |
3602 | init_completion(&sbi->s_kobj_unregister); | |
3603 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3604 | "%s", sb->s_id); | |
3605 | if (err) { | |
3606 | ext4_mb_release(sb); | |
3607 | ext4_ext_release(sb); | |
3608 | goto failed_mount4; | |
3609 | }; | |
3610 | ||
617ba13b MC |
3611 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3612 | ext4_orphan_cleanup(sb, es); | |
3613 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3614 | if (needs_recovery) { |
b31e1552 | 3615 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3616 | ext4_mark_recovery_complete(sb, es); |
3617 | } | |
3618 | if (EXT4_SB(sb)->s_journal) { | |
3619 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3620 | descr = " journalled data mode"; | |
3621 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3622 | descr = " ordered data mode"; | |
3623 | else | |
3624 | descr = " writeback data mode"; | |
3625 | } else | |
3626 | descr = "out journal"; | |
3627 | ||
d4c402d9 | 3628 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3629 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3630 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3631 | |
66e61a9e TT |
3632 | init_timer(&sbi->s_err_report); |
3633 | sbi->s_err_report.function = print_daily_error_info; | |
3634 | sbi->s_err_report.data = (unsigned long) sb; | |
3635 | if (es->s_error_count) | |
3636 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3637 | |
d4c402d9 | 3638 | kfree(orig_data); |
ac27a0ec DK |
3639 | return 0; |
3640 | ||
617ba13b | 3641 | cantfind_ext4: |
ac27a0ec | 3642 | if (!silent) |
b31e1552 | 3643 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3644 | goto failed_mount; |
3645 | ||
3646 | failed_mount4: | |
b31e1552 | 3647 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3648 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3649 | failed_mount_wq: | |
6fd058f7 | 3650 | ext4_release_system_zone(sb); |
0390131b FM |
3651 | if (sbi->s_journal) { |
3652 | jbd2_journal_destroy(sbi->s_journal); | |
3653 | sbi->s_journal = NULL; | |
3654 | } | |
ac27a0ec | 3655 | failed_mount3: |
c5ca7c76 TT |
3656 | if (sbi->s_flex_groups) { |
3657 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3658 | vfree(sbi->s_flex_groups); | |
3659 | else | |
3660 | kfree(sbi->s_flex_groups); | |
3661 | } | |
ce7e010a TT |
3662 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3663 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3664 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3665 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
ac27a0ec DK |
3666 | failed_mount2: |
3667 | for (i = 0; i < db_count; i++) | |
3668 | brelse(sbi->s_group_desc[i]); | |
3669 | kfree(sbi->s_group_desc); | |
3670 | failed_mount: | |
240799cd | 3671 | if (sbi->s_proc) { |
9f6200bb | 3672 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3673 | } |
ac27a0ec DK |
3674 | #ifdef CONFIG_QUOTA |
3675 | for (i = 0; i < MAXQUOTAS; i++) | |
3676 | kfree(sbi->s_qf_names[i]); | |
3677 | #endif | |
617ba13b | 3678 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3679 | brelse(bh); |
3680 | out_fail: | |
3681 | sb->s_fs_info = NULL; | |
f6830165 | 3682 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3683 | kfree(sbi); |
dcc7dae3 | 3684 | out_free_orig: |
d4c402d9 | 3685 | kfree(orig_data); |
1d1fe1ee | 3686 | return ret; |
ac27a0ec DK |
3687 | } |
3688 | ||
3689 | /* | |
3690 | * Setup any per-fs journal parameters now. We'll do this both on | |
3691 | * initial mount, once the journal has been initialised but before we've | |
3692 | * done any recovery; and again on any subsequent remount. | |
3693 | */ | |
617ba13b | 3694 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3695 | { |
617ba13b | 3696 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3697 | |
30773840 TT |
3698 | journal->j_commit_interval = sbi->s_commit_interval; |
3699 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3700 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3701 | |
a931da6a | 3702 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3703 | if (test_opt(sb, BARRIER)) |
dab291af | 3704 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3705 | else |
dab291af | 3706 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3707 | if (test_opt(sb, DATA_ERR_ABORT)) |
3708 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3709 | else | |
3710 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3711 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3712 | } |
3713 | ||
617ba13b | 3714 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3715 | unsigned int journal_inum) |
3716 | { | |
3717 | struct inode *journal_inode; | |
3718 | journal_t *journal; | |
3719 | ||
0390131b FM |
3720 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3721 | ||
ac27a0ec DK |
3722 | /* First, test for the existence of a valid inode on disk. Bad |
3723 | * things happen if we iget() an unused inode, as the subsequent | |
3724 | * iput() will try to delete it. */ | |
3725 | ||
1d1fe1ee DH |
3726 | journal_inode = ext4_iget(sb, journal_inum); |
3727 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3728 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3729 | return NULL; |
3730 | } | |
3731 | if (!journal_inode->i_nlink) { | |
3732 | make_bad_inode(journal_inode); | |
3733 | iput(journal_inode); | |
b31e1552 | 3734 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3735 | return NULL; |
3736 | } | |
3737 | ||
e5f8eab8 | 3738 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3739 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3740 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3741 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3742 | iput(journal_inode); |
3743 | return NULL; | |
3744 | } | |
3745 | ||
dab291af | 3746 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3747 | if (!journal) { |
b31e1552 | 3748 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3749 | iput(journal_inode); |
3750 | return NULL; | |
3751 | } | |
3752 | journal->j_private = sb; | |
617ba13b | 3753 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3754 | return journal; |
3755 | } | |
3756 | ||
617ba13b | 3757 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3758 | dev_t j_dev) |
3759 | { | |
2b2d6d01 | 3760 | struct buffer_head *bh; |
ac27a0ec | 3761 | journal_t *journal; |
617ba13b MC |
3762 | ext4_fsblk_t start; |
3763 | ext4_fsblk_t len; | |
ac27a0ec | 3764 | int hblock, blocksize; |
617ba13b | 3765 | ext4_fsblk_t sb_block; |
ac27a0ec | 3766 | unsigned long offset; |
2b2d6d01 | 3767 | struct ext4_super_block *es; |
ac27a0ec DK |
3768 | struct block_device *bdev; |
3769 | ||
0390131b FM |
3770 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3771 | ||
b31e1552 | 3772 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3773 | if (bdev == NULL) |
3774 | return NULL; | |
3775 | ||
3776 | if (bd_claim(bdev, sb)) { | |
b31e1552 ES |
3777 | ext4_msg(sb, KERN_ERR, |
3778 | "failed to claim external journal device"); | |
9a1c3542 | 3779 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE); |
ac27a0ec DK |
3780 | return NULL; |
3781 | } | |
3782 | ||
3783 | blocksize = sb->s_blocksize; | |
e1defc4f | 3784 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3785 | if (blocksize < hblock) { |
b31e1552 ES |
3786 | ext4_msg(sb, KERN_ERR, |
3787 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3788 | goto out_bdev; |
3789 | } | |
3790 | ||
617ba13b MC |
3791 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3792 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3793 | set_blocksize(bdev, blocksize); |
3794 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3795 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3796 | "external journal"); | |
ac27a0ec DK |
3797 | goto out_bdev; |
3798 | } | |
3799 | ||
617ba13b MC |
3800 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3801 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3802 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3803 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3804 | ext4_msg(sb, KERN_ERR, "external journal has " |
3805 | "bad superblock"); | |
ac27a0ec DK |
3806 | brelse(bh); |
3807 | goto out_bdev; | |
3808 | } | |
3809 | ||
617ba13b | 3810 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3811 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3812 | brelse(bh); |
3813 | goto out_bdev; | |
3814 | } | |
3815 | ||
bd81d8ee | 3816 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3817 | start = sb_block + 1; |
3818 | brelse(bh); /* we're done with the superblock */ | |
3819 | ||
dab291af | 3820 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3821 | start, len, blocksize); |
3822 | if (!journal) { | |
b31e1552 | 3823 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3824 | goto out_bdev; |
3825 | } | |
3826 | journal->j_private = sb; | |
3827 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3828 | wait_on_buffer(journal->j_sb_buffer); | |
3829 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3830 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3831 | goto out_journal; |
3832 | } | |
3833 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3834 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3835 | "user (unsupported) - %d", | |
ac27a0ec DK |
3836 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3837 | goto out_journal; | |
3838 | } | |
617ba13b MC |
3839 | EXT4_SB(sb)->journal_bdev = bdev; |
3840 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3841 | return journal; |
0b8e58a1 | 3842 | |
ac27a0ec | 3843 | out_journal: |
dab291af | 3844 | jbd2_journal_destroy(journal); |
ac27a0ec | 3845 | out_bdev: |
617ba13b | 3846 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3847 | return NULL; |
3848 | } | |
3849 | ||
617ba13b MC |
3850 | static int ext4_load_journal(struct super_block *sb, |
3851 | struct ext4_super_block *es, | |
ac27a0ec DK |
3852 | unsigned long journal_devnum) |
3853 | { | |
3854 | journal_t *journal; | |
3855 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3856 | dev_t journal_dev; | |
3857 | int err = 0; | |
3858 | int really_read_only; | |
3859 | ||
0390131b FM |
3860 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3861 | ||
ac27a0ec DK |
3862 | if (journal_devnum && |
3863 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3864 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3865 | "numbers have changed"); | |
ac27a0ec DK |
3866 | journal_dev = new_decode_dev(journal_devnum); |
3867 | } else | |
3868 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3869 | ||
3870 | really_read_only = bdev_read_only(sb->s_bdev); | |
3871 | ||
3872 | /* | |
3873 | * Are we loading a blank journal or performing recovery after a | |
3874 | * crash? For recovery, we need to check in advance whether we | |
3875 | * can get read-write access to the device. | |
3876 | */ | |
617ba13b | 3877 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3878 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3879 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3880 | "required on readonly filesystem"); | |
ac27a0ec | 3881 | if (really_read_only) { |
b31e1552 ES |
3882 | ext4_msg(sb, KERN_ERR, "write access " |
3883 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3884 | return -EROFS; |
3885 | } | |
b31e1552 ES |
3886 | ext4_msg(sb, KERN_INFO, "write access will " |
3887 | "be enabled during recovery"); | |
ac27a0ec DK |
3888 | } |
3889 | } | |
3890 | ||
3891 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3892 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3893 | "and inode journals!"); | |
ac27a0ec DK |
3894 | return -EINVAL; |
3895 | } | |
3896 | ||
3897 | if (journal_inum) { | |
617ba13b | 3898 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3899 | return -EINVAL; |
3900 | } else { | |
617ba13b | 3901 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3902 | return -EINVAL; |
3903 | } | |
3904 | ||
90576c0b | 3905 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3906 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3907 | |
ac27a0ec | 3908 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3909 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3910 | if (err) { |
b31e1552 | 3911 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3912 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3913 | return err; |
3914 | } | |
3915 | } | |
3916 | ||
617ba13b | 3917 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3918 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
3919 | if (!err) { |
3920 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
3921 | if (save) | |
3922 | memcpy(save, ((char *) es) + | |
3923 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 3924 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
3925 | if (save) |
3926 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
3927 | save, EXT4_S_ERR_LEN); | |
3928 | kfree(save); | |
3929 | } | |
ac27a0ec DK |
3930 | |
3931 | if (err) { | |
b31e1552 | 3932 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3933 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3934 | return err; |
3935 | } | |
3936 | ||
617ba13b MC |
3937 | EXT4_SB(sb)->s_journal = journal; |
3938 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3939 | |
c41303ce | 3940 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
3941 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
3942 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3943 | |
3944 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3945 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3946 | } |
3947 | ||
3948 | return 0; | |
3949 | } | |
3950 | ||
e2d67052 | 3951 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3952 | { |
e2d67052 | 3953 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3954 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3955 | int error = 0; |
ac27a0ec DK |
3956 | |
3957 | if (!sbh) | |
c4be0c1d | 3958 | return error; |
914258bf TT |
3959 | if (buffer_write_io_error(sbh)) { |
3960 | /* | |
3961 | * Oh, dear. A previous attempt to write the | |
3962 | * superblock failed. This could happen because the | |
3963 | * USB device was yanked out. Or it could happen to | |
3964 | * be a transient write error and maybe the block will | |
3965 | * be remapped. Nothing we can do but to retry the | |
3966 | * write and hope for the best. | |
3967 | */ | |
b31e1552 ES |
3968 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3969 | "superblock detected"); | |
914258bf TT |
3970 | clear_buffer_write_io_error(sbh); |
3971 | set_buffer_uptodate(sbh); | |
3972 | } | |
71290b36 TT |
3973 | /* |
3974 | * If the file system is mounted read-only, don't update the | |
3975 | * superblock write time. This avoids updating the superblock | |
3976 | * write time when we are mounting the root file system | |
3977 | * read/only but we need to replay the journal; at that point, | |
3978 | * for people who are east of GMT and who make their clock | |
3979 | * tick in localtime for Windows bug-for-bug compatibility, | |
3980 | * the clock is set in the future, and this will cause e2fsck | |
3981 | * to complain and force a full file system check. | |
3982 | */ | |
3983 | if (!(sb->s_flags & MS_RDONLY)) | |
3984 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
3985 | if (sb->s_bdev->bd_part) |
3986 | es->s_kbytes_written = | |
3987 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
3988 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
3989 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
3990 | else |
3991 | es->s_kbytes_written = | |
3992 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
ce7e010a TT |
3993 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3994 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3995 | es->s_free_inodes_count = | |
3996 | cpu_to_le32(percpu_counter_sum_positive( | |
3997 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3998 | sb->s_dirt = 0; |
ac27a0ec DK |
3999 | BUFFER_TRACE(sbh, "marking dirty"); |
4000 | mark_buffer_dirty(sbh); | |
914258bf | 4001 | if (sync) { |
c4be0c1d TS |
4002 | error = sync_dirty_buffer(sbh); |
4003 | if (error) | |
4004 | return error; | |
4005 | ||
4006 | error = buffer_write_io_error(sbh); | |
4007 | if (error) { | |
b31e1552 ES |
4008 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4009 | "superblock"); | |
914258bf TT |
4010 | clear_buffer_write_io_error(sbh); |
4011 | set_buffer_uptodate(sbh); | |
4012 | } | |
4013 | } | |
c4be0c1d | 4014 | return error; |
ac27a0ec DK |
4015 | } |
4016 | ||
ac27a0ec DK |
4017 | /* |
4018 | * Have we just finished recovery? If so, and if we are mounting (or | |
4019 | * remounting) the filesystem readonly, then we will end up with a | |
4020 | * consistent fs on disk. Record that fact. | |
4021 | */ | |
2b2d6d01 TT |
4022 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4023 | struct ext4_super_block *es) | |
ac27a0ec | 4024 | { |
617ba13b | 4025 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4026 | |
0390131b FM |
4027 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4028 | BUG_ON(journal != NULL); | |
4029 | return; | |
4030 | } | |
dab291af | 4031 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4032 | if (jbd2_journal_flush(journal) < 0) |
4033 | goto out; | |
4034 | ||
617ba13b | 4035 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4036 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4037 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4038 | ext4_commit_super(sb, 1); |
ac27a0ec | 4039 | } |
7ffe1ea8 HK |
4040 | |
4041 | out: | |
dab291af | 4042 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4043 | } |
4044 | ||
4045 | /* | |
4046 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4047 | * has recorded an error from a previous lifetime, move that error to the | |
4048 | * main filesystem now. | |
4049 | */ | |
2b2d6d01 TT |
4050 | static void ext4_clear_journal_err(struct super_block *sb, |
4051 | struct ext4_super_block *es) | |
ac27a0ec DK |
4052 | { |
4053 | journal_t *journal; | |
4054 | int j_errno; | |
4055 | const char *errstr; | |
4056 | ||
0390131b FM |
4057 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4058 | ||
617ba13b | 4059 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4060 | |
4061 | /* | |
4062 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4063 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4064 | */ |
4065 | ||
dab291af | 4066 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4067 | if (j_errno) { |
4068 | char nbuf[16]; | |
4069 | ||
617ba13b | 4070 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4071 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4072 | "from previous mount: %s", errstr); |
12062ddd | 4073 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4074 | |
617ba13b MC |
4075 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4076 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4077 | ext4_commit_super(sb, 1); |
ac27a0ec | 4078 | |
dab291af | 4079 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4080 | } |
4081 | } | |
4082 | ||
4083 | /* | |
4084 | * Force the running and committing transactions to commit, | |
4085 | * and wait on the commit. | |
4086 | */ | |
617ba13b | 4087 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4088 | { |
4089 | journal_t *journal; | |
0390131b | 4090 | int ret = 0; |
ac27a0ec DK |
4091 | |
4092 | if (sb->s_flags & MS_RDONLY) | |
4093 | return 0; | |
4094 | ||
617ba13b | 4095 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4096 | if (journal) { |
437f88cc | 4097 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4098 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4099 | } |
0390131b | 4100 | |
ac27a0ec DK |
4101 | return ret; |
4102 | } | |
4103 | ||
2b2d6d01 | 4104 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4105 | { |
ebc1ac16 | 4106 | lock_super(sb); |
9ca92389 | 4107 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4108 | unlock_super(sb); |
ac27a0ec DK |
4109 | } |
4110 | ||
617ba13b | 4111 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4112 | { |
14ce0cb4 | 4113 | int ret = 0; |
9eddacf9 | 4114 | tid_t target; |
8d5d02e6 | 4115 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4116 | |
9bffad1e | 4117 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4118 | flush_workqueue(sbi->dio_unwritten_wq); |
4119 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4120 | if (wait) |
8d5d02e6 | 4121 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4122 | } |
14ce0cb4 | 4123 | return ret; |
ac27a0ec DK |
4124 | } |
4125 | ||
4126 | /* | |
4127 | * LVM calls this function before a (read-only) snapshot is created. This | |
4128 | * gives us a chance to flush the journal completely and mark the fs clean. | |
4129 | */ | |
c4be0c1d | 4130 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4131 | { |
c4be0c1d TS |
4132 | int error = 0; |
4133 | journal_t *journal; | |
ac27a0ec | 4134 | |
9ca92389 TT |
4135 | if (sb->s_flags & MS_RDONLY) |
4136 | return 0; | |
ac27a0ec | 4137 | |
9ca92389 | 4138 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4139 | |
9ca92389 TT |
4140 | /* Now we set up the journal barrier. */ |
4141 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4142 | |
9ca92389 TT |
4143 | /* |
4144 | * Don't clear the needs_recovery flag if we failed to flush | |
4145 | * the journal. | |
4146 | */ | |
4147 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4148 | if (error < 0) |
4149 | goto out; | |
9ca92389 TT |
4150 | |
4151 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4152 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4153 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4154 | out: |
4155 | /* we rely on s_frozen to stop further updates */ | |
4156 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4157 | return error; | |
ac27a0ec DK |
4158 | } |
4159 | ||
4160 | /* | |
4161 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4162 | * flag here, even though the filesystem is not technically dirty yet. | |
4163 | */ | |
c4be0c1d | 4164 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4165 | { |
9ca92389 TT |
4166 | if (sb->s_flags & MS_RDONLY) |
4167 | return 0; | |
4168 | ||
4169 | lock_super(sb); | |
4170 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4171 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4172 | ext4_commit_super(sb, 1); | |
4173 | unlock_super(sb); | |
c4be0c1d | 4174 | return 0; |
ac27a0ec DK |
4175 | } |
4176 | ||
673c6100 TT |
4177 | /* |
4178 | * Structure to save mount options for ext4_remount's benefit | |
4179 | */ | |
4180 | struct ext4_mount_options { | |
4181 | unsigned long s_mount_opt; | |
a2595b8a | 4182 | unsigned long s_mount_opt2; |
673c6100 TT |
4183 | uid_t s_resuid; |
4184 | gid_t s_resgid; | |
4185 | unsigned long s_commit_interval; | |
4186 | u32 s_min_batch_time, s_max_batch_time; | |
4187 | #ifdef CONFIG_QUOTA | |
4188 | int s_jquota_fmt; | |
4189 | char *s_qf_names[MAXQUOTAS]; | |
4190 | #endif | |
4191 | }; | |
4192 | ||
2b2d6d01 | 4193 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4194 | { |
2b2d6d01 | 4195 | struct ext4_super_block *es; |
617ba13b MC |
4196 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4197 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4198 | unsigned long old_sb_flags; |
617ba13b | 4199 | struct ext4_mount_options old_opts; |
c79d967d | 4200 | int enable_quota = 0; |
8a266467 | 4201 | ext4_group_t g; |
b3881f74 | 4202 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
4203 | int err; |
4204 | #ifdef CONFIG_QUOTA | |
4205 | int i; | |
4206 | #endif | |
d4c402d9 | 4207 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4208 | |
4209 | /* Store the original options */ | |
bbd6851a | 4210 | lock_super(sb); |
ac27a0ec DK |
4211 | old_sb_flags = sb->s_flags; |
4212 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4213 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4214 | old_opts.s_resuid = sbi->s_resuid; |
4215 | old_opts.s_resgid = sbi->s_resgid; | |
4216 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4217 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4218 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4219 | #ifdef CONFIG_QUOTA |
4220 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4221 | for (i = 0; i < MAXQUOTAS; i++) | |
4222 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4223 | #endif | |
b3881f74 TT |
4224 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4225 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4226 | |
4227 | /* | |
4228 | * Allow the "check" option to be passed as a remount option. | |
4229 | */ | |
b3881f74 TT |
4230 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4231 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4232 | err = -EINVAL; |
4233 | goto restore_opts; | |
4234 | } | |
4235 | ||
4ab2f15b | 4236 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4237 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4238 | |
4239 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4240 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4241 | |
4242 | es = sbi->s_es; | |
4243 | ||
b3881f74 | 4244 | if (sbi->s_journal) { |
0390131b | 4245 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4246 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4247 | } | |
ac27a0ec DK |
4248 | |
4249 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4250 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4251 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4252 | err = -EROFS; |
4253 | goto restore_opts; | |
4254 | } | |
4255 | ||
4256 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4257 | err = dquot_suspend(sb, -1); |
4258 | if (err < 0) | |
c79d967d | 4259 | goto restore_opts; |
c79d967d | 4260 | |
ac27a0ec DK |
4261 | /* |
4262 | * First of all, the unconditional stuff we have to do | |
4263 | * to disable replay of the journal when we next remount | |
4264 | */ | |
4265 | sb->s_flags |= MS_RDONLY; | |
4266 | ||
4267 | /* | |
4268 | * OK, test if we are remounting a valid rw partition | |
4269 | * readonly, and if so set the rdonly flag and then | |
4270 | * mark the partition as valid again. | |
4271 | */ | |
617ba13b MC |
4272 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4273 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4274 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4275 | ||
a63c9eb2 | 4276 | if (sbi->s_journal) |
0390131b | 4277 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4278 | } else { |
a13fb1a4 ES |
4279 | /* Make sure we can mount this feature set readwrite */ |
4280 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4281 | err = -EROFS; |
4282 | goto restore_opts; | |
4283 | } | |
8a266467 TT |
4284 | /* |
4285 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4286 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4287 | */ |
4288 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4289 | struct ext4_group_desc *gdp = | |
4290 | ext4_get_group_desc(sb, g, NULL); | |
4291 | ||
4292 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4293 | ext4_msg(sb, KERN_ERR, |
4294 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4295 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4296 | le16_to_cpu(gdp->bg_checksum)); | |
4297 | err = -EINVAL; | |
4298 | goto restore_opts; | |
4299 | } | |
4300 | } | |
4301 | ||
ead6596b ES |
4302 | /* |
4303 | * If we have an unprocessed orphan list hanging | |
4304 | * around from a previously readonly bdev mount, | |
4305 | * require a full umount/remount for now. | |
4306 | */ | |
4307 | if (es->s_last_orphan) { | |
b31e1552 | 4308 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4309 | "remount RDWR because of unprocessed " |
4310 | "orphan inode list. Please " | |
b31e1552 | 4311 | "umount/remount instead"); |
ead6596b ES |
4312 | err = -EINVAL; |
4313 | goto restore_opts; | |
4314 | } | |
4315 | ||
ac27a0ec DK |
4316 | /* |
4317 | * Mounting a RDONLY partition read-write, so reread | |
4318 | * and store the current valid flag. (It may have | |
4319 | * been changed by e2fsck since we originally mounted | |
4320 | * the partition.) | |
4321 | */ | |
0390131b FM |
4322 | if (sbi->s_journal) |
4323 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4324 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4325 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4326 | goto restore_opts; |
2b2d6d01 | 4327 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4328 | sb->s_flags &= ~MS_RDONLY; |
c79d967d | 4329 | enable_quota = 1; |
ac27a0ec DK |
4330 | } |
4331 | } | |
bfff6873 LC |
4332 | |
4333 | /* | |
4334 | * Reinitialize lazy itable initialization thread based on | |
4335 | * current settings | |
4336 | */ | |
4337 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4338 | ext4_unregister_li_request(sb); | |
4339 | else { | |
4340 | ext4_group_t first_not_zeroed; | |
4341 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4342 | ext4_register_li_request(sb, first_not_zeroed); | |
4343 | } | |
4344 | ||
6fd058f7 | 4345 | ext4_setup_system_zone(sb); |
0390131b | 4346 | if (sbi->s_journal == NULL) |
e2d67052 | 4347 | ext4_commit_super(sb, 1); |
0390131b | 4348 | |
ac27a0ec DK |
4349 | #ifdef CONFIG_QUOTA |
4350 | /* Release old quota file names */ | |
4351 | for (i = 0; i < MAXQUOTAS; i++) | |
4352 | if (old_opts.s_qf_names[i] && | |
4353 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4354 | kfree(old_opts.s_qf_names[i]); | |
4355 | #endif | |
bbd6851a | 4356 | unlock_super(sb); |
c79d967d | 4357 | if (enable_quota) |
0f0dd62f | 4358 | dquot_resume(sb, -1); |
d4c402d9 CW |
4359 | |
4360 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4361 | kfree(orig_data); | |
ac27a0ec | 4362 | return 0; |
0b8e58a1 | 4363 | |
ac27a0ec DK |
4364 | restore_opts: |
4365 | sb->s_flags = old_sb_flags; | |
4366 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4367 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4368 | sbi->s_resuid = old_opts.s_resuid; |
4369 | sbi->s_resgid = old_opts.s_resgid; | |
4370 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4371 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4372 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4373 | #ifdef CONFIG_QUOTA |
4374 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4375 | for (i = 0; i < MAXQUOTAS; i++) { | |
4376 | if (sbi->s_qf_names[i] && | |
4377 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4378 | kfree(sbi->s_qf_names[i]); | |
4379 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4380 | } | |
4381 | #endif | |
bbd6851a | 4382 | unlock_super(sb); |
d4c402d9 | 4383 | kfree(orig_data); |
ac27a0ec DK |
4384 | return err; |
4385 | } | |
4386 | ||
2b2d6d01 | 4387 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4388 | { |
4389 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4390 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4391 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 4392 | u64 fsid; |
ac27a0ec | 4393 | |
5e70030d BP |
4394 | if (test_opt(sb, MINIX_DF)) { |
4395 | sbi->s_overhead_last = 0; | |
6bc9feff | 4396 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4397 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4398 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4399 | |
4400 | /* | |
5e70030d BP |
4401 | * Compute the overhead (FS structures). This is constant |
4402 | * for a given filesystem unless the number of block groups | |
4403 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4404 | */ |
4405 | ||
4406 | /* | |
4407 | * All of the blocks before first_data_block are | |
4408 | * overhead | |
4409 | */ | |
4410 | overhead = le32_to_cpu(es->s_first_data_block); | |
4411 | ||
4412 | /* | |
4413 | * Add the overhead attributed to the superblock and | |
4414 | * block group descriptors. If the sparse superblocks | |
4415 | * feature is turned on, then not all groups have this. | |
4416 | */ | |
4417 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
4418 | overhead += ext4_bg_has_super(sb, i) + |
4419 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
4420 | cond_resched(); |
4421 | } | |
4422 | ||
4423 | /* | |
4424 | * Every block group has an inode bitmap, a block | |
4425 | * bitmap, and an inode table. | |
4426 | */ | |
5e70030d BP |
4427 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
4428 | sbi->s_overhead_last = overhead; | |
4429 | smp_wmb(); | |
6bc9feff | 4430 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4431 | } |
4432 | ||
617ba13b | 4433 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4434 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 4435 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
4436 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
4437 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
4438 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4439 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4440 | buf->f_bavail = 0; |
4441 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4442 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4443 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4444 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4445 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4446 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4447 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4448 | |
ac27a0ec DK |
4449 | return 0; |
4450 | } | |
4451 | ||
0b8e58a1 AD |
4452 | /* Helper function for writing quotas on sync - we need to start transaction |
4453 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4454 | * Process 1 Process 2 |
617ba13b | 4455 | * ext4_create() quota_sync() |
a269eb18 | 4456 | * jbd2_journal_start() write_dquot() |
871a2931 | 4457 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4458 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4459 | * |
4460 | */ | |
4461 | ||
4462 | #ifdef CONFIG_QUOTA | |
4463 | ||
4464 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4465 | { | |
4466 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4467 | } | |
4468 | ||
617ba13b | 4469 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4470 | { |
4471 | int ret, err; | |
4472 | handle_t *handle; | |
4473 | struct inode *inode; | |
4474 | ||
4475 | inode = dquot_to_inode(dquot); | |
617ba13b | 4476 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4477 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4478 | if (IS_ERR(handle)) |
4479 | return PTR_ERR(handle); | |
4480 | ret = dquot_commit(dquot); | |
617ba13b | 4481 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4482 | if (!ret) |
4483 | ret = err; | |
4484 | return ret; | |
4485 | } | |
4486 | ||
617ba13b | 4487 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4488 | { |
4489 | int ret, err; | |
4490 | handle_t *handle; | |
4491 | ||
617ba13b | 4492 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4493 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4494 | if (IS_ERR(handle)) |
4495 | return PTR_ERR(handle); | |
4496 | ret = dquot_acquire(dquot); | |
617ba13b | 4497 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4498 | if (!ret) |
4499 | ret = err; | |
4500 | return ret; | |
4501 | } | |
4502 | ||
617ba13b | 4503 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4504 | { |
4505 | int ret, err; | |
4506 | handle_t *handle; | |
4507 | ||
617ba13b | 4508 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4509 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4510 | if (IS_ERR(handle)) { |
4511 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4512 | dquot_release(dquot); | |
ac27a0ec | 4513 | return PTR_ERR(handle); |
9c3013e9 | 4514 | } |
ac27a0ec | 4515 | ret = dquot_release(dquot); |
617ba13b | 4516 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4517 | if (!ret) |
4518 | ret = err; | |
4519 | return ret; | |
4520 | } | |
4521 | ||
617ba13b | 4522 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4523 | { |
2c8be6b2 | 4524 | /* Are we journaling quotas? */ |
617ba13b MC |
4525 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4526 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4527 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4528 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4529 | } else { |
4530 | return dquot_mark_dquot_dirty(dquot); | |
4531 | } | |
4532 | } | |
4533 | ||
617ba13b | 4534 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4535 | { |
4536 | int ret, err; | |
4537 | handle_t *handle; | |
4538 | ||
4539 | /* Data block + inode block */ | |
617ba13b | 4540 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4541 | if (IS_ERR(handle)) |
4542 | return PTR_ERR(handle); | |
4543 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4544 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4545 | if (!ret) |
4546 | ret = err; | |
4547 | return ret; | |
4548 | } | |
4549 | ||
4550 | /* | |
4551 | * Turn on quotas during mount time - we need to find | |
4552 | * the quota file and such... | |
4553 | */ | |
617ba13b | 4554 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4555 | { |
287a8095 CH |
4556 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4557 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4558 | } |
4559 | ||
4560 | /* | |
4561 | * Standard function to be called on quota_on | |
4562 | */ | |
617ba13b | 4563 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 4564 | char *name) |
ac27a0ec DK |
4565 | { |
4566 | int err; | |
8264613d | 4567 | struct path path; |
ac27a0ec DK |
4568 | |
4569 | if (!test_opt(sb, QUOTA)) | |
4570 | return -EINVAL; | |
0623543b | 4571 | |
8264613d | 4572 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
4573 | if (err) |
4574 | return err; | |
0623543b | 4575 | |
ac27a0ec | 4576 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
4577 | if (path.mnt->mnt_sb != sb) { |
4578 | path_put(&path); | |
ac27a0ec DK |
4579 | return -EXDEV; |
4580 | } | |
0623543b JK |
4581 | /* Journaling quota? */ |
4582 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4583 | /* Quotafile not in fs root? */ |
8264613d | 4584 | if (path.dentry->d_parent != sb->s_root) |
b31e1552 ES |
4585 | ext4_msg(sb, KERN_WARNING, |
4586 | "Quota file not on filesystem root. " | |
4587 | "Journaled quota will not work"); | |
2b2d6d01 | 4588 | } |
0623543b JK |
4589 | |
4590 | /* | |
4591 | * When we journal data on quota file, we have to flush journal to see | |
4592 | * all updates to the file when we bypass pagecache... | |
4593 | */ | |
0390131b FM |
4594 | if (EXT4_SB(sb)->s_journal && |
4595 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
4596 | /* |
4597 | * We don't need to lock updates but journal_flush() could | |
4598 | * otherwise be livelocked... | |
4599 | */ | |
4600 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4601 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4602 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 4603 | if (err) { |
8264613d | 4604 | path_put(&path); |
7ffe1ea8 HK |
4605 | return err; |
4606 | } | |
0623543b JK |
4607 | } |
4608 | ||
287a8095 | 4609 | err = dquot_quota_on_path(sb, type, format_id, &path); |
8264613d | 4610 | path_put(&path); |
77e69dac | 4611 | return err; |
ac27a0ec DK |
4612 | } |
4613 | ||
ca0e05e4 DM |
4614 | static int ext4_quota_off(struct super_block *sb, int type) |
4615 | { | |
87009d86 DM |
4616 | /* Force all delayed allocation blocks to be allocated. |
4617 | * Caller already holds s_umount sem */ | |
4618 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4619 | sync_filesystem(sb); |
ca0e05e4 DM |
4620 | |
4621 | return dquot_quota_off(sb, type); | |
4622 | } | |
4623 | ||
ac27a0ec DK |
4624 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4625 | * acquiring the locks... As quota files are never truncated and quota code | |
4626 | * itself serializes the operations (and noone else should touch the files) | |
4627 | * we don't have to be afraid of races */ | |
617ba13b | 4628 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4629 | size_t len, loff_t off) |
4630 | { | |
4631 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4632 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4633 | int err = 0; |
4634 | int offset = off & (sb->s_blocksize - 1); | |
4635 | int tocopy; | |
4636 | size_t toread; | |
4637 | struct buffer_head *bh; | |
4638 | loff_t i_size = i_size_read(inode); | |
4639 | ||
4640 | if (off > i_size) | |
4641 | return 0; | |
4642 | if (off+len > i_size) | |
4643 | len = i_size-off; | |
4644 | toread = len; | |
4645 | while (toread > 0) { | |
4646 | tocopy = sb->s_blocksize - offset < toread ? | |
4647 | sb->s_blocksize - offset : toread; | |
617ba13b | 4648 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4649 | if (err) |
4650 | return err; | |
4651 | if (!bh) /* A hole? */ | |
4652 | memset(data, 0, tocopy); | |
4653 | else | |
4654 | memcpy(data, bh->b_data+offset, tocopy); | |
4655 | brelse(bh); | |
4656 | offset = 0; | |
4657 | toread -= tocopy; | |
4658 | data += tocopy; | |
4659 | blk++; | |
4660 | } | |
4661 | return len; | |
4662 | } | |
4663 | ||
4664 | /* Write to quotafile (we know the transaction is already started and has | |
4665 | * enough credits) */ | |
617ba13b | 4666 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4667 | const char *data, size_t len, loff_t off) |
4668 | { | |
4669 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4670 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4671 | int err = 0; |
4672 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4673 | struct buffer_head *bh; |
4674 | handle_t *handle = journal_current_handle(); | |
4675 | ||
0390131b | 4676 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4677 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4678 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4679 | (unsigned long long)off, (unsigned long long)len); |
4680 | return -EIO; | |
4681 | } | |
67eeb568 DM |
4682 | /* |
4683 | * Since we account only one data block in transaction credits, | |
4684 | * then it is impossible to cross a block boundary. | |
4685 | */ | |
4686 | if (sb->s_blocksize - offset < len) { | |
4687 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4688 | " cancelled because not block aligned", | |
4689 | (unsigned long long)off, (unsigned long long)len); | |
4690 | return -EIO; | |
4691 | } | |
4692 | ||
ac27a0ec | 4693 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4694 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4695 | if (!bh) | |
4696 | goto out; | |
62d2b5f2 JK |
4697 | err = ext4_journal_get_write_access(handle, bh); |
4698 | if (err) { | |
4699 | brelse(bh); | |
4700 | goto out; | |
ac27a0ec | 4701 | } |
67eeb568 DM |
4702 | lock_buffer(bh); |
4703 | memcpy(bh->b_data+offset, data, len); | |
4704 | flush_dcache_page(bh->b_page); | |
4705 | unlock_buffer(bh); | |
62d2b5f2 | 4706 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4707 | brelse(bh); |
ac27a0ec | 4708 | out: |
67eeb568 | 4709 | if (err) { |
4d04e4fb | 4710 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4711 | return err; |
4d04e4fb | 4712 | } |
67eeb568 DM |
4713 | if (inode->i_size < off + len) { |
4714 | i_size_write(inode, off + len); | |
617ba13b | 4715 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 4716 | } |
ac27a0ec | 4717 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 4718 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4719 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4720 | return len; |
ac27a0ec DK |
4721 | } |
4722 | ||
4723 | #endif | |
4724 | ||
152a0836 AV |
4725 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4726 | const char *dev_name, void *data) | |
ac27a0ec | 4727 | { |
152a0836 | 4728 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4729 | } |
4730 | ||
37f328eb | 4731 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4732 | static struct file_system_type ext2_fs_type = { |
4733 | .owner = THIS_MODULE, | |
4734 | .name = "ext2", | |
152a0836 | 4735 | .mount = ext4_mount, |
24b58424 TT |
4736 | .kill_sb = kill_block_super, |
4737 | .fs_flags = FS_REQUIRES_DEV, | |
4738 | }; | |
4739 | ||
4740 | static inline void register_as_ext2(void) | |
4741 | { | |
4742 | int err = register_filesystem(&ext2_fs_type); | |
4743 | if (err) | |
4744 | printk(KERN_WARNING | |
4745 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4746 | } | |
4747 | ||
4748 | static inline void unregister_as_ext2(void) | |
4749 | { | |
4750 | unregister_filesystem(&ext2_fs_type); | |
4751 | } | |
51b7e3c9 | 4752 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4753 | #else |
4754 | static inline void register_as_ext2(void) { } | |
4755 | static inline void unregister_as_ext2(void) { } | |
4756 | #endif | |
4757 | ||
37f328eb | 4758 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4759 | static inline void register_as_ext3(void) |
4760 | { | |
4761 | int err = register_filesystem(&ext3_fs_type); | |
4762 | if (err) | |
4763 | printk(KERN_WARNING | |
4764 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4765 | } | |
4766 | ||
4767 | static inline void unregister_as_ext3(void) | |
4768 | { | |
4769 | unregister_filesystem(&ext3_fs_type); | |
4770 | } | |
51b7e3c9 | 4771 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4772 | #else |
4773 | static inline void register_as_ext3(void) { } | |
4774 | static inline void unregister_as_ext3(void) { } | |
4775 | #endif | |
4776 | ||
03010a33 TT |
4777 | static struct file_system_type ext4_fs_type = { |
4778 | .owner = THIS_MODULE, | |
4779 | .name = "ext4", | |
152a0836 | 4780 | .mount = ext4_mount, |
03010a33 TT |
4781 | .kill_sb = kill_block_super, |
4782 | .fs_flags = FS_REQUIRES_DEV, | |
4783 | }; | |
4784 | ||
857ac889 LC |
4785 | int __init ext4_init_feat_adverts(void) |
4786 | { | |
4787 | struct ext4_features *ef; | |
4788 | int ret = -ENOMEM; | |
4789 | ||
4790 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
4791 | if (!ef) | |
4792 | goto out; | |
4793 | ||
4794 | ef->f_kobj.kset = ext4_kset; | |
4795 | init_completion(&ef->f_kobj_unregister); | |
4796 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
4797 | "features"); | |
4798 | if (ret) { | |
4799 | kfree(ef); | |
4800 | goto out; | |
4801 | } | |
4802 | ||
4803 | ext4_feat = ef; | |
4804 | ret = 0; | |
4805 | out: | |
4806 | return ret; | |
4807 | } | |
4808 | ||
5dabfc78 | 4809 | static int __init ext4_init_fs(void) |
ac27a0ec | 4810 | { |
c9de560d AT |
4811 | int err; |
4812 | ||
12e9b892 | 4813 | ext4_check_flag_values(); |
5dabfc78 | 4814 | err = ext4_init_pageio(); |
6fd058f7 TT |
4815 | if (err) |
4816 | return err; | |
5dabfc78 | 4817 | err = ext4_init_system_zone(); |
bd2d0210 TT |
4818 | if (err) |
4819 | goto out5; | |
3197ebdb TT |
4820 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4821 | if (!ext4_kset) | |
6fd058f7 | 4822 | goto out4; |
9f6200bb | 4823 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
4824 | |
4825 | err = ext4_init_feat_adverts(); | |
4826 | ||
5dabfc78 | 4827 | err = ext4_init_mballoc(); |
ac27a0ec | 4828 | if (err) |
6fd058f7 | 4829 | goto out3; |
c9de560d | 4830 | |
5dabfc78 | 4831 | err = ext4_init_xattr(); |
c9de560d AT |
4832 | if (err) |
4833 | goto out2; | |
ac27a0ec DK |
4834 | err = init_inodecache(); |
4835 | if (err) | |
4836 | goto out1; | |
24b58424 TT |
4837 | register_as_ext2(); |
4838 | register_as_ext3(); | |
03010a33 | 4839 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4840 | if (err) |
4841 | goto out; | |
bfff6873 LC |
4842 | |
4843 | ext4_li_info = NULL; | |
4844 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
4845 | return 0; |
4846 | out: | |
24b58424 TT |
4847 | unregister_as_ext2(); |
4848 | unregister_as_ext3(); | |
ac27a0ec DK |
4849 | destroy_inodecache(); |
4850 | out1: | |
5dabfc78 | 4851 | ext4_exit_xattr(); |
c9de560d | 4852 | out2: |
5dabfc78 | 4853 | ext4_exit_mballoc(); |
6fd058f7 | 4854 | out3: |
857ac889 | 4855 | kfree(ext4_feat); |
6fd058f7 TT |
4856 | remove_proc_entry("fs/ext4", NULL); |
4857 | kset_unregister(ext4_kset); | |
4858 | out4: | |
5dabfc78 | 4859 | ext4_exit_system_zone(); |
bd2d0210 | 4860 | out5: |
5dabfc78 | 4861 | ext4_exit_pageio(); |
ac27a0ec DK |
4862 | return err; |
4863 | } | |
4864 | ||
5dabfc78 | 4865 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 4866 | { |
bfff6873 | 4867 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
4868 | unregister_as_ext2(); |
4869 | unregister_as_ext3(); | |
03010a33 | 4870 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4871 | destroy_inodecache(); |
5dabfc78 TT |
4872 | ext4_exit_xattr(); |
4873 | ext4_exit_mballoc(); | |
9f6200bb | 4874 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4875 | kset_unregister(ext4_kset); |
5dabfc78 TT |
4876 | ext4_exit_system_zone(); |
4877 | ext4_exit_pageio(); | |
ac27a0ec DK |
4878 | } |
4879 | ||
4880 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4881 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4882 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
4883 | module_init(ext4_init_fs) |
4884 | module_exit(ext4_exit_fs) |