]>
Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
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; |
0b75a840 LC |
57 | static struct ext4_lazy_init *ext4_li_info; |
58 | static struct mutex ext4_li_mtx; | |
59 | static 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); | |
d39195c3 | 78 | static int ext4_feature_set_ok(struct super_block *sb, int readonly); |
bfff6873 LC |
79 | static void ext4_destroy_lazyinit_thread(void); |
80 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 81 | static void ext4_clear_request_list(void); |
ac27a0ec | 82 | |
ba69f9ab JK |
83 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
84 | static struct file_system_type ext3_fs_type = { | |
85 | .owner = THIS_MODULE, | |
86 | .name = "ext3", | |
152a0836 | 87 | .mount = ext4_mount, |
ba69f9ab JK |
88 | .kill_sb = kill_block_super, |
89 | .fs_flags = FS_REQUIRES_DEV, | |
90 | }; | |
91 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
92 | #else | |
93 | #define IS_EXT3_SB(sb) (0) | |
94 | #endif | |
bd81d8ee | 95 | |
8fadc143 AR |
96 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
97 | struct ext4_group_desc *bg) | |
bd81d8ee | 98 | { |
3a14589c | 99 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 100 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 101 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
102 | } |
103 | ||
8fadc143 AR |
104 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
105 | struct ext4_group_desc *bg) | |
bd81d8ee | 106 | { |
5272f837 | 107 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 108 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 109 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
110 | } |
111 | ||
8fadc143 AR |
112 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
113 | struct ext4_group_desc *bg) | |
bd81d8ee | 114 | { |
5272f837 | 115 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 116 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 117 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
118 | } |
119 | ||
560671a0 AK |
120 | __u32 ext4_free_blks_count(struct super_block *sb, |
121 | struct ext4_group_desc *bg) | |
122 | { | |
123 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
124 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 125 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
126 | } |
127 | ||
128 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
129 | struct ext4_group_desc *bg) | |
130 | { | |
131 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
132 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 133 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
134 | } |
135 | ||
136 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
137 | struct ext4_group_desc *bg) | |
138 | { | |
139 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
140 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 141 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
142 | } |
143 | ||
144 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
145 | struct ext4_group_desc *bg) | |
146 | { | |
147 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
148 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 149 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
150 | } |
151 | ||
8fadc143 AR |
152 | void ext4_block_bitmap_set(struct super_block *sb, |
153 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 154 | { |
3a14589c | 155 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
156 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
157 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
158 | } |
159 | ||
8fadc143 AR |
160 | void ext4_inode_bitmap_set(struct super_block *sb, |
161 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 162 | { |
5272f837 | 163 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
164 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
165 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
166 | } |
167 | ||
8fadc143 AR |
168 | void ext4_inode_table_set(struct super_block *sb, |
169 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 170 | { |
5272f837 | 171 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
172 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
173 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
174 | } |
175 | ||
560671a0 AK |
176 | void ext4_free_blks_set(struct super_block *sb, |
177 | struct ext4_group_desc *bg, __u32 count) | |
178 | { | |
179 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
180 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
181 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
182 | } | |
183 | ||
184 | void ext4_free_inodes_set(struct super_block *sb, | |
185 | struct ext4_group_desc *bg, __u32 count) | |
186 | { | |
187 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
188 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
189 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
190 | } | |
191 | ||
192 | void ext4_used_dirs_set(struct super_block *sb, | |
193 | struct ext4_group_desc *bg, __u32 count) | |
194 | { | |
195 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
196 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
197 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
198 | } | |
199 | ||
200 | void ext4_itable_unused_set(struct super_block *sb, | |
201 | struct ext4_group_desc *bg, __u32 count) | |
202 | { | |
203 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
204 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
205 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
206 | } | |
207 | ||
d3d1faf6 CW |
208 | |
209 | /* Just increment the non-pointer handle value */ | |
210 | static handle_t *ext4_get_nojournal(void) | |
211 | { | |
212 | handle_t *handle = current->journal_info; | |
213 | unsigned long ref_cnt = (unsigned long)handle; | |
214 | ||
215 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
216 | ||
217 | ref_cnt++; | |
218 | handle = (handle_t *)ref_cnt; | |
219 | ||
220 | current->journal_info = handle; | |
221 | return handle; | |
222 | } | |
223 | ||
224 | ||
225 | /* Decrement the non-pointer handle value */ | |
226 | static void ext4_put_nojournal(handle_t *handle) | |
227 | { | |
228 | unsigned long ref_cnt = (unsigned long)handle; | |
229 | ||
230 | BUG_ON(ref_cnt == 0); | |
231 | ||
232 | ref_cnt--; | |
233 | handle = (handle_t *)ref_cnt; | |
234 | ||
235 | current->journal_info = handle; | |
236 | } | |
237 | ||
ac27a0ec | 238 | /* |
dab291af | 239 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
240 | * |
241 | * The only special thing we need to do here is to make sure that all | |
242 | * journal_end calls result in the superblock being marked dirty, so | |
243 | * that sync() will call the filesystem's write_super callback if | |
244 | * appropriate. | |
245 | */ | |
617ba13b | 246 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
247 | { |
248 | journal_t *journal; | |
249 | ||
250 | if (sb->s_flags & MS_RDONLY) | |
251 | return ERR_PTR(-EROFS); | |
252 | ||
437f88cc | 253 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
ac27a0ec DK |
254 | /* Special case here: if the journal has aborted behind our |
255 | * backs (eg. EIO in the commit thread), then we still need to | |
256 | * take the FS itself readonly cleanly. */ | |
617ba13b | 257 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
258 | if (journal) { |
259 | if (is_journal_aborted(journal)) { | |
c67d859e | 260 | ext4_abort(sb, "Detected aborted journal"); |
0390131b FM |
261 | return ERR_PTR(-EROFS); |
262 | } | |
263 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 264 | } |
d3d1faf6 | 265 | return ext4_get_nojournal(); |
ac27a0ec DK |
266 | } |
267 | ||
268 | /* | |
269 | * The only special thing we need to do here is to make sure that all | |
dab291af | 270 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
271 | * that sync() will call the filesystem's write_super callback if |
272 | * appropriate. | |
273 | */ | |
c398eda0 | 274 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
275 | { |
276 | struct super_block *sb; | |
277 | int err; | |
278 | int rc; | |
279 | ||
0390131b | 280 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 281 | ext4_put_nojournal(handle); |
0390131b FM |
282 | return 0; |
283 | } | |
ac27a0ec DK |
284 | sb = handle->h_transaction->t_journal->j_private; |
285 | err = handle->h_err; | |
dab291af | 286 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
287 | |
288 | if (!err) | |
289 | err = rc; | |
290 | if (err) | |
c398eda0 | 291 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
292 | return err; |
293 | } | |
294 | ||
90c7201b TT |
295 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
296 | const char *err_fn, struct buffer_head *bh, | |
297 | handle_t *handle, int err) | |
ac27a0ec DK |
298 | { |
299 | char nbuf[16]; | |
617ba13b | 300 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 301 | |
0390131b FM |
302 | BUG_ON(!ext4_handle_valid(handle)); |
303 | ||
ac27a0ec DK |
304 | if (bh) |
305 | BUFFER_TRACE(bh, "abort"); | |
306 | ||
307 | if (!handle->h_err) | |
308 | handle->h_err = err; | |
309 | ||
310 | if (is_handle_aborted(handle)) | |
311 | return; | |
312 | ||
90c7201b TT |
313 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
314 | caller, line, errstr, err_fn); | |
ac27a0ec | 315 | |
dab291af | 316 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
317 | } |
318 | ||
1c13d5c0 TT |
319 | static void __save_error_info(struct super_block *sb, const char *func, |
320 | unsigned int line) | |
321 | { | |
322 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
323 | ||
324 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
325 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
326 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
327 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
328 | es->s_last_error_line = cpu_to_le32(line); | |
329 | if (!es->s_first_error_time) { | |
330 | es->s_first_error_time = es->s_last_error_time; | |
331 | strncpy(es->s_first_error_func, func, | |
332 | sizeof(es->s_first_error_func)); | |
333 | es->s_first_error_line = cpu_to_le32(line); | |
334 | es->s_first_error_ino = es->s_last_error_ino; | |
335 | es->s_first_error_block = es->s_last_error_block; | |
336 | } | |
66e61a9e TT |
337 | /* |
338 | * Start the daily error reporting function if it hasn't been | |
339 | * started already | |
340 | */ | |
341 | if (!es->s_error_count) | |
342 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
343 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
344 | } | |
345 | ||
346 | static void save_error_info(struct super_block *sb, const char *func, | |
347 | unsigned int line) | |
348 | { | |
349 | __save_error_info(sb, func, line); | |
350 | ext4_commit_super(sb, 1); | |
351 | } | |
352 | ||
353 | ||
ac27a0ec DK |
354 | /* Deal with the reporting of failure conditions on a filesystem such as |
355 | * inconsistencies detected or read IO failures. | |
356 | * | |
357 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 358 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
359 | * write ordering constraints on the superblock which prevent us from |
360 | * writing it out straight away; and given that the journal is about to | |
361 | * be aborted, we can't rely on the current, or future, transactions to | |
362 | * write out the superblock safely. | |
363 | * | |
dab291af | 364 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 365 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
366 | * that error until we've noted it down and cleared it. |
367 | */ | |
368 | ||
617ba13b | 369 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 370 | { |
ac27a0ec DK |
371 | if (sb->s_flags & MS_RDONLY) |
372 | return; | |
373 | ||
2b2d6d01 | 374 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 375 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 376 | |
4ab2f15b | 377 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 378 | if (journal) |
dab291af | 379 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 380 | } |
2b2d6d01 | 381 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 382 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
383 | sb->s_flags |= MS_RDONLY; |
384 | } | |
ac27a0ec | 385 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 386 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
387 | sb->s_id); |
388 | } | |
389 | ||
12062ddd | 390 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 391 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 392 | { |
0ff2ea7d | 393 | struct va_format vaf; |
ac27a0ec DK |
394 | va_list args; |
395 | ||
396 | va_start(args, fmt); | |
0ff2ea7d JP |
397 | vaf.fmt = fmt; |
398 | vaf.va = &args; | |
399 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
400 | sb->s_id, function, line, current->comm, &vaf); | |
ac27a0ec DK |
401 | va_end(args); |
402 | ||
617ba13b | 403 | ext4_handle_error(sb); |
ac27a0ec DK |
404 | } |
405 | ||
c398eda0 TT |
406 | void ext4_error_inode(struct inode *inode, const char *function, |
407 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
408 | const char *fmt, ...) |
409 | { | |
410 | va_list args; | |
f7c21177 | 411 | struct va_format vaf; |
1c13d5c0 | 412 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 413 | |
1c13d5c0 TT |
414 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
415 | es->s_last_error_block = cpu_to_le64(block); | |
416 | save_error_info(inode->i_sb, function, line); | |
273df556 | 417 | va_start(args, fmt); |
f7c21177 TT |
418 | vaf.fmt = fmt; |
419 | vaf.va = &args; | |
c398eda0 TT |
420 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
421 | inode->i_sb->s_id, function, line, inode->i_ino); | |
422 | if (block) | |
f7c21177 TT |
423 | printk(KERN_CONT "block %llu: ", block); |
424 | printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); | |
273df556 FM |
425 | va_end(args); |
426 | ||
427 | ext4_handle_error(inode->i_sb); | |
428 | } | |
429 | ||
c398eda0 | 430 | void ext4_error_file(struct file *file, const char *function, |
f7c21177 TT |
431 | unsigned int line, ext4_fsblk_t block, |
432 | const char *fmt, ...) | |
273df556 FM |
433 | { |
434 | va_list args; | |
f7c21177 | 435 | struct va_format vaf; |
1c13d5c0 | 436 | struct ext4_super_block *es; |
273df556 FM |
437 | struct inode *inode = file->f_dentry->d_inode; |
438 | char pathname[80], *path; | |
439 | ||
1c13d5c0 TT |
440 | es = EXT4_SB(inode->i_sb)->s_es; |
441 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
442 | save_error_info(inode->i_sb, function, line); | |
273df556 | 443 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); |
f9a62d09 | 444 | if (IS_ERR(path)) |
273df556 FM |
445 | path = "(unknown)"; |
446 | printk(KERN_CRIT | |
f7c21177 TT |
447 | "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
448 | inode->i_sb->s_id, function, line, inode->i_ino); | |
449 | if (block) | |
450 | printk(KERN_CONT "block %llu: ", block); | |
451 | va_start(args, fmt); | |
452 | vaf.fmt = fmt; | |
453 | vaf.va = &args; | |
454 | printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); | |
273df556 FM |
455 | va_end(args); |
456 | ||
457 | ext4_handle_error(inode->i_sb); | |
458 | } | |
459 | ||
2b2d6d01 | 460 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
461 | char nbuf[16]) |
462 | { | |
463 | char *errstr = NULL; | |
464 | ||
465 | switch (errno) { | |
466 | case -EIO: | |
467 | errstr = "IO failure"; | |
468 | break; | |
469 | case -ENOMEM: | |
470 | errstr = "Out of memory"; | |
471 | break; | |
472 | case -EROFS: | |
78f1ddbb TT |
473 | if (!sb || (EXT4_SB(sb)->s_journal && |
474 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
475 | errstr = "Journal has aborted"; |
476 | else | |
477 | errstr = "Readonly filesystem"; | |
478 | break; | |
479 | default: | |
480 | /* If the caller passed in an extra buffer for unknown | |
481 | * errors, textualise them now. Else we just return | |
482 | * NULL. */ | |
483 | if (nbuf) { | |
484 | /* Check for truncated error codes... */ | |
485 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
486 | errstr = nbuf; | |
487 | } | |
488 | break; | |
489 | } | |
490 | ||
491 | return errstr; | |
492 | } | |
493 | ||
617ba13b | 494 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
495 | * automatically and invokes the appropriate error response. */ |
496 | ||
c398eda0 TT |
497 | void __ext4_std_error(struct super_block *sb, const char *function, |
498 | unsigned int line, int errno) | |
ac27a0ec DK |
499 | { |
500 | char nbuf[16]; | |
501 | const char *errstr; | |
502 | ||
503 | /* Special case: if the error is EROFS, and we're not already | |
504 | * inside a transaction, then there's really no point in logging | |
505 | * an error. */ | |
506 | if (errno == -EROFS && journal_current_handle() == NULL && | |
507 | (sb->s_flags & MS_RDONLY)) | |
508 | return; | |
509 | ||
617ba13b | 510 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
511 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
512 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 513 | save_error_info(sb, function, line); |
ac27a0ec | 514 | |
617ba13b | 515 | ext4_handle_error(sb); |
ac27a0ec DK |
516 | } |
517 | ||
518 | /* | |
617ba13b | 519 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
520 | * abort function may be used to deal with unrecoverable failures such |
521 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
522 | * | |
523 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
524 | * unless the error response on the fs has been set to panic in which | |
525 | * case we take the easy way out and panic immediately. | |
526 | */ | |
527 | ||
c67d859e | 528 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 529 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
530 | { |
531 | va_list args; | |
532 | ||
1c13d5c0 | 533 | save_error_info(sb, function, line); |
ac27a0ec | 534 | va_start(args, fmt); |
c398eda0 TT |
535 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
536 | function, line); | |
ac27a0ec DK |
537 | vprintk(fmt, args); |
538 | printk("\n"); | |
539 | va_end(args); | |
540 | ||
1c13d5c0 TT |
541 | if ((sb->s_flags & MS_RDONLY) == 0) { |
542 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
543 | sb->s_flags |= MS_RDONLY; | |
544 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
545 | if (EXT4_SB(sb)->s_journal) | |
546 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
547 | save_error_info(sb, function, line); | |
548 | } | |
ac27a0ec | 549 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 550 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
551 | } |
552 | ||
0ff2ea7d | 553 | void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) |
b31e1552 | 554 | { |
0ff2ea7d | 555 | struct va_format vaf; |
b31e1552 ES |
556 | va_list args; |
557 | ||
558 | va_start(args, fmt); | |
0ff2ea7d JP |
559 | vaf.fmt = fmt; |
560 | vaf.va = &args; | |
561 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
b31e1552 ES |
562 | va_end(args); |
563 | } | |
564 | ||
12062ddd | 565 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 566 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 567 | { |
0ff2ea7d | 568 | struct va_format vaf; |
ac27a0ec DK |
569 | va_list args; |
570 | ||
571 | va_start(args, fmt); | |
0ff2ea7d JP |
572 | vaf.fmt = fmt; |
573 | vaf.va = &args; | |
574 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
575 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
576 | va_end(args); |
577 | } | |
578 | ||
e29136f8 TT |
579 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
580 | struct super_block *sb, ext4_group_t grp, | |
581 | unsigned long ino, ext4_fsblk_t block, | |
582 | const char *fmt, ...) | |
5d1b1b3f AK |
583 | __releases(bitlock) |
584 | __acquires(bitlock) | |
585 | { | |
0ff2ea7d | 586 | struct va_format vaf; |
5d1b1b3f AK |
587 | va_list args; |
588 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
589 | ||
1c13d5c0 TT |
590 | es->s_last_error_ino = cpu_to_le32(ino); |
591 | es->s_last_error_block = cpu_to_le64(block); | |
592 | __save_error_info(sb, function, line); | |
0ff2ea7d | 593 | |
5d1b1b3f | 594 | va_start(args, fmt); |
0ff2ea7d JP |
595 | |
596 | vaf.fmt = fmt; | |
597 | vaf.va = &args; | |
21149d61 | 598 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", |
e29136f8 TT |
599 | sb->s_id, function, line, grp); |
600 | if (ino) | |
0ff2ea7d | 601 | printk(KERN_CONT "inode %lu: ", ino); |
e29136f8 | 602 | if (block) |
0ff2ea7d JP |
603 | printk(KERN_CONT "block %llu:", (unsigned long long) block); |
604 | printk(KERN_CONT "%pV\n", &vaf); | |
5d1b1b3f AK |
605 | va_end(args); |
606 | ||
607 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 608 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
609 | return; |
610 | } | |
1c13d5c0 | 611 | |
5d1b1b3f AK |
612 | ext4_unlock_group(sb, grp); |
613 | ext4_handle_error(sb); | |
614 | /* | |
615 | * We only get here in the ERRORS_RO case; relocking the group | |
616 | * may be dangerous, but nothing bad will happen since the | |
617 | * filesystem will have already been marked read/only and the | |
618 | * journal has been aborted. We return 1 as a hint to callers | |
619 | * who might what to use the return value from | |
620 | * ext4_grp_locked_error() to distinguish beween the | |
621 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
622 | * aggressively from the ext4 function in question, with a | |
623 | * more appropriate error code. | |
624 | */ | |
625 | ext4_lock_group(sb, grp); | |
626 | return; | |
627 | } | |
628 | ||
617ba13b | 629 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 630 | { |
617ba13b | 631 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 632 | |
617ba13b | 633 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
634 | return; |
635 | ||
12062ddd | 636 | ext4_warning(sb, |
ac27a0ec DK |
637 | "updating to rev %d because of new feature flag, " |
638 | "running e2fsck is recommended", | |
617ba13b | 639 | EXT4_DYNAMIC_REV); |
ac27a0ec | 640 | |
617ba13b MC |
641 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
642 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
643 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
644 | /* leave es->s_feature_*compat flags alone */ |
645 | /* es->s_uuid will be set by e2fsck if empty */ | |
646 | ||
647 | /* | |
648 | * The rest of the superblock fields should be zero, and if not it | |
649 | * means they are likely already in use, so leave them alone. We | |
650 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
651 | */ | |
652 | } | |
653 | ||
654 | /* | |
655 | * Open the external journal device | |
656 | */ | |
b31e1552 | 657 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
658 | { |
659 | struct block_device *bdev; | |
660 | char b[BDEVNAME_SIZE]; | |
661 | ||
d4d77629 | 662 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
663 | if (IS_ERR(bdev)) |
664 | goto fail; | |
665 | return bdev; | |
666 | ||
667 | fail: | |
b31e1552 | 668 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
669 | __bdevname(dev, b), PTR_ERR(bdev)); |
670 | return NULL; | |
671 | } | |
672 | ||
673 | /* | |
674 | * Release the journal device | |
675 | */ | |
617ba13b | 676 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 677 | { |
e525fd89 | 678 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
679 | } |
680 | ||
617ba13b | 681 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
682 | { |
683 | struct block_device *bdev; | |
684 | int ret = -ENODEV; | |
685 | ||
686 | bdev = sbi->journal_bdev; | |
687 | if (bdev) { | |
617ba13b | 688 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
689 | sbi->journal_bdev = NULL; |
690 | } | |
691 | return ret; | |
692 | } | |
693 | ||
694 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
695 | { | |
617ba13b | 696 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
697 | } |
698 | ||
617ba13b | 699 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
700 | { |
701 | struct list_head *l; | |
702 | ||
b31e1552 ES |
703 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
704 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
705 | |
706 | printk(KERN_ERR "sb_info orphan list:\n"); | |
707 | list_for_each(l, &sbi->s_orphan) { | |
708 | struct inode *inode = orphan_list_entry(l); | |
709 | printk(KERN_ERR " " | |
710 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
711 | inode->i_sb->s_id, inode->i_ino, inode, | |
712 | inode->i_mode, inode->i_nlink, | |
713 | NEXT_ORPHAN(inode)); | |
714 | } | |
715 | } | |
716 | ||
2b2d6d01 | 717 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 718 | { |
617ba13b MC |
719 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
720 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 721 | int i, err; |
ac27a0ec | 722 | |
857ac889 | 723 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
724 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
725 | ||
4c0425ff MC |
726 | flush_workqueue(sbi->dio_unwritten_wq); |
727 | destroy_workqueue(sbi->dio_unwritten_wq); | |
728 | ||
a9e220f8 | 729 | lock_super(sb); |
8c85e125 | 730 | if (sb->s_dirt) |
ebc1ac16 | 731 | ext4_commit_super(sb, 1); |
8c85e125 | 732 | |
0390131b FM |
733 | if (sbi->s_journal) { |
734 | err = jbd2_journal_destroy(sbi->s_journal); | |
735 | sbi->s_journal = NULL; | |
736 | if (err < 0) | |
c67d859e | 737 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 738 | } |
d4edac31 | 739 | |
a1c6c569 | 740 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
741 | ext4_release_system_zone(sb); |
742 | ext4_mb_release(sb); | |
743 | ext4_ext_release(sb); | |
744 | ext4_xattr_put_super(sb); | |
745 | ||
ac27a0ec | 746 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 747 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 748 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 749 | ext4_commit_super(sb, 1); |
ac27a0ec | 750 | } |
240799cd | 751 | if (sbi->s_proc) { |
9f6200bb | 752 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 753 | } |
3197ebdb | 754 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
755 | |
756 | for (i = 0; i < sbi->s_gdb_count; i++) | |
757 | brelse(sbi->s_group_desc[i]); | |
758 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
759 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
760 | vfree(sbi->s_flex_groups); | |
761 | else | |
762 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
763 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
764 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
765 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 766 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
767 | brelse(sbi->s_sbh); |
768 | #ifdef CONFIG_QUOTA | |
769 | for (i = 0; i < MAXQUOTAS; i++) | |
770 | kfree(sbi->s_qf_names[i]); | |
771 | #endif | |
772 | ||
773 | /* Debugging code just in case the in-memory inode orphan list | |
774 | * isn't empty. The on-disk one can be non-empty if we've | |
775 | * detected an error and taken the fs readonly, but the | |
776 | * in-memory list had better be clean by this point. */ | |
777 | if (!list_empty(&sbi->s_orphan)) | |
778 | dump_orphan_list(sb, sbi); | |
779 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
780 | ||
f98393a6 | 781 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
782 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
783 | /* | |
784 | * Invalidate the journal device's buffers. We don't want them | |
785 | * floating about in memory - the physical journal device may | |
786 | * hotswapped, and it breaks the `ro-after' testing code. | |
787 | */ | |
788 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 789 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 790 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
791 | } |
792 | sb->s_fs_info = NULL; | |
3197ebdb TT |
793 | /* |
794 | * Now that we are completely done shutting down the | |
795 | * superblock, we need to actually destroy the kobject. | |
796 | */ | |
3197ebdb TT |
797 | unlock_super(sb); |
798 | kobject_put(&sbi->s_kobj); | |
799 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 800 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 801 | kfree(sbi); |
ac27a0ec DK |
802 | } |
803 | ||
e18b890b | 804 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
805 | |
806 | /* | |
807 | * Called inside transaction, so use GFP_NOFS | |
808 | */ | |
617ba13b | 809 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 810 | { |
617ba13b | 811 | struct ext4_inode_info *ei; |
ac27a0ec | 812 | |
e6b4f8da | 813 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
814 | if (!ei) |
815 | return NULL; | |
0b8e58a1 | 816 | |
ac27a0ec | 817 | ei->vfs_inode.i_version = 1; |
91246c00 | 818 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 819 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
820 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
821 | spin_lock_init(&ei->i_prealloc_lock); | |
d2a17637 MC |
822 | ei->i_reserved_data_blocks = 0; |
823 | ei->i_reserved_meta_blocks = 0; | |
824 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 825 | ei->i_da_metadata_calc_len = 0; |
d2a17637 | 826 | spin_lock_init(&(ei->i_block_reservation_lock)); |
a9e7f447 DM |
827 | #ifdef CONFIG_QUOTA |
828 | ei->i_reserved_quota = 0; | |
829 | #endif | |
8aefcd55 | 830 | ei->jinode = NULL; |
c7064ef1 | 831 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 832 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 833 | ei->cur_aio_dio = NULL; |
b436b9be JK |
834 | ei->i_sync_tid = 0; |
835 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 836 | atomic_set(&ei->i_ioend_count, 0); |
e9e3bcec | 837 | atomic_set(&ei->i_aiodio_unwritten, 0); |
0b8e58a1 | 838 | |
ac27a0ec DK |
839 | return &ei->vfs_inode; |
840 | } | |
841 | ||
7ff9c073 TT |
842 | static int ext4_drop_inode(struct inode *inode) |
843 | { | |
844 | int drop = generic_drop_inode(inode); | |
845 | ||
846 | trace_ext4_drop_inode(inode, drop); | |
847 | return drop; | |
848 | } | |
849 | ||
fa0d7e3d NP |
850 | static void ext4_i_callback(struct rcu_head *head) |
851 | { | |
852 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
853 | INIT_LIST_HEAD(&inode->i_dentry); | |
854 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); | |
855 | } | |
856 | ||
617ba13b | 857 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 858 | { |
f7ad6d2e | 859 | ext4_ioend_wait(inode); |
9f7dd93d | 860 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
861 | ext4_msg(inode->i_sb, KERN_ERR, |
862 | "Inode %lu (%p): orphan list check failed!", | |
863 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
864 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
865 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
866 | true); | |
867 | dump_stack(); | |
868 | } | |
fa0d7e3d | 869 | call_rcu(&inode->i_rcu, ext4_i_callback); |
ac27a0ec DK |
870 | } |
871 | ||
51cc5068 | 872 | static void init_once(void *foo) |
ac27a0ec | 873 | { |
617ba13b | 874 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 875 | |
a35afb83 | 876 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 877 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 878 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 879 | #endif |
0e855ac8 | 880 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 881 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
882 | } |
883 | ||
884 | static int init_inodecache(void) | |
885 | { | |
617ba13b MC |
886 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
887 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
888 | 0, (SLAB_RECLAIM_ACCOUNT| |
889 | SLAB_MEM_SPREAD), | |
20c2df83 | 890 | init_once); |
617ba13b | 891 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
892 | return -ENOMEM; |
893 | return 0; | |
894 | } | |
895 | ||
896 | static void destroy_inodecache(void) | |
897 | { | |
617ba13b | 898 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
899 | } |
900 | ||
0930fcc1 | 901 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 902 | { |
0930fcc1 AV |
903 | invalidate_inode_buffers(inode); |
904 | end_writeback(inode); | |
9f754758 | 905 | dquot_drop(inode); |
c2ea3fde | 906 | ext4_discard_preallocations(inode); |
8aefcd55 TT |
907 | if (EXT4_I(inode)->jinode) { |
908 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
909 | EXT4_I(inode)->jinode); | |
910 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
911 | EXT4_I(inode)->jinode = NULL; | |
912 | } | |
ac27a0ec DK |
913 | } |
914 | ||
2b2d6d01 TT |
915 | static inline void ext4_show_quota_options(struct seq_file *seq, |
916 | struct super_block *sb) | |
ac27a0ec DK |
917 | { |
918 | #if defined(CONFIG_QUOTA) | |
617ba13b | 919 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 920 | |
5a20bdfc JK |
921 | if (sbi->s_jquota_fmt) { |
922 | char *fmtname = ""; | |
923 | ||
924 | switch (sbi->s_jquota_fmt) { | |
925 | case QFMT_VFS_OLD: | |
926 | fmtname = "vfsold"; | |
927 | break; | |
928 | case QFMT_VFS_V0: | |
929 | fmtname = "vfsv0"; | |
930 | break; | |
931 | case QFMT_VFS_V1: | |
932 | fmtname = "vfsv1"; | |
933 | break; | |
934 | } | |
935 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
936 | } | |
ac27a0ec DK |
937 | |
938 | if (sbi->s_qf_names[USRQUOTA]) | |
939 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
940 | ||
941 | if (sbi->s_qf_names[GRPQUOTA]) | |
942 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
943 | ||
482a7425 | 944 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
945 | seq_puts(seq, ",usrquota"); |
946 | ||
482a7425 | 947 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
948 | seq_puts(seq, ",grpquota"); |
949 | #endif | |
950 | } | |
951 | ||
d9c9bef1 MS |
952 | /* |
953 | * Show an option if | |
954 | * - it's set to a non-default value OR | |
955 | * - if the per-sb default is different from the global default | |
956 | */ | |
617ba13b | 957 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 958 | { |
aa22df2c AK |
959 | int def_errors; |
960 | unsigned long def_mount_opts; | |
ac27a0ec | 961 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
962 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
963 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
964 | |
965 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 966 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
967 | |
968 | if (sbi->s_sb_block != 1) | |
969 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
970 | if (test_opt(sb, MINIX_DF)) | |
971 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 972 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
973 | seq_puts(seq, ",grpid"); |
974 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
975 | seq_puts(seq, ",nogrpid"); | |
976 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
977 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
978 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
979 | } | |
980 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
981 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
982 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
983 | } | |
bb4f397a | 984 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 985 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
986 | def_errors == EXT4_ERRORS_CONTINUE) { |
987 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
988 | } |
989 | } | |
aa22df2c | 990 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 991 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 992 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 993 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 994 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 995 | seq_puts(seq, ",nouid32"); |
aa22df2c | 996 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
997 | seq_puts(seq, ",debug"); |
998 | if (test_opt(sb, OLDALLOC)) | |
999 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 1000 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 1001 | if (test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1002 | seq_puts(seq, ",user_xattr"); |
ea663336 | 1003 | if (!test_opt(sb, XATTR_USER)) |
d9c9bef1 | 1004 | seq_puts(seq, ",nouser_xattr"); |
d9c9bef1 | 1005 | #endif |
03010a33 | 1006 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 1007 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
1008 | seq_puts(seq, ",acl"); |
1009 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
1010 | seq_puts(seq, ",noacl"); | |
1011 | #endif | |
30773840 | 1012 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
1013 | seq_printf(seq, ",commit=%u", |
1014 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1015 | } | |
30773840 TT |
1016 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1017 | seq_printf(seq, ",min_batch_time=%u", | |
1018 | (unsigned) sbi->s_min_batch_time); | |
1019 | } | |
1020 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1021 | seq_printf(seq, ",max_batch_time=%u", | |
1022 | (unsigned) sbi->s_min_batch_time); | |
1023 | } | |
1024 | ||
571640ca ES |
1025 | /* |
1026 | * We're changing the default of barrier mount option, so | |
1027 | * let's always display its mount state so it's clear what its | |
1028 | * status is. | |
1029 | */ | |
1030 | seq_puts(seq, ",barrier="); | |
1031 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1032 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1033 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1034 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1035 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1036 | if (test_opt(sb, I_VERSION)) |
1037 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1038 | if (!test_opt(sb, DELALLOC) && |
1039 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1040 | seq_puts(seq, ",nodelalloc"); |
1041 | ||
6fd7a467 TT |
1042 | if (!test_opt(sb, MBLK_IO_SUBMIT)) |
1043 | seq_puts(seq, ",nomblk_io_submit"); | |
cb45bbe4 MS |
1044 | if (sbi->s_stripe) |
1045 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1046 | /* |
1047 | * journal mode get enabled in different ways | |
1048 | * So just print the value even if we didn't specify it | |
1049 | */ | |
617ba13b | 1050 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1051 | seq_puts(seq, ",data=journal"); |
617ba13b | 1052 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1053 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1054 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1055 | seq_puts(seq, ",data=writeback"); |
1056 | ||
240799cd TT |
1057 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1058 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1059 | sbi->s_inode_readahead_blks); | |
1060 | ||
5bf5683a HK |
1061 | if (test_opt(sb, DATA_ERR_ABORT)) |
1062 | seq_puts(seq, ",data_err=abort"); | |
1063 | ||
afd4672d | 1064 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1065 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1066 | |
8b67f04a | 1067 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1068 | seq_puts(seq, ",discard"); |
1069 | ||
e3bb52ae ES |
1070 | if (test_opt(sb, NOLOAD)) |
1071 | seq_puts(seq, ",norecovery"); | |
1072 | ||
744692dc JZ |
1073 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1074 | seq_puts(seq, ",dioread_nolock"); | |
1075 | ||
8b67f04a TT |
1076 | if (test_opt(sb, BLOCK_VALIDITY) && |
1077 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1078 | seq_puts(seq, ",block_validity"); | |
1079 | ||
bfff6873 LC |
1080 | if (!test_opt(sb, INIT_INODE_TABLE)) |
1081 | seq_puts(seq, ",noinit_inode_table"); | |
1082 | else if (sbi->s_li_wait_mult) | |
1083 | seq_printf(seq, ",init_inode_table=%u", | |
1084 | (unsigned) sbi->s_li_wait_mult); | |
1085 | ||
617ba13b | 1086 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1087 | |
ac27a0ec DK |
1088 | return 0; |
1089 | } | |
1090 | ||
1b961ac0 | 1091 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1092 | u64 ino, u32 generation) |
ac27a0ec | 1093 | { |
ac27a0ec | 1094 | struct inode *inode; |
ac27a0ec | 1095 | |
617ba13b | 1096 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1097 | return ERR_PTR(-ESTALE); |
617ba13b | 1098 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1099 | return ERR_PTR(-ESTALE); |
1100 | ||
1101 | /* iget isn't really right if the inode is currently unallocated!! | |
1102 | * | |
617ba13b | 1103 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1104 | * deleted, so we should be safe. |
1105 | * | |
1106 | * Currently we don't know the generation for parent directory, so | |
1107 | * a generation of 0 means "accept any" | |
1108 | */ | |
1d1fe1ee DH |
1109 | inode = ext4_iget(sb, ino); |
1110 | if (IS_ERR(inode)) | |
1111 | return ERR_CAST(inode); | |
1112 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1113 | iput(inode); |
1114 | return ERR_PTR(-ESTALE); | |
1115 | } | |
1b961ac0 CH |
1116 | |
1117 | return inode; | |
1118 | } | |
1119 | ||
1120 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1121 | int fh_len, int fh_type) |
1b961ac0 CH |
1122 | { |
1123 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1124 | ext4_nfs_get_inode); | |
1125 | } | |
1126 | ||
1127 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1128 | int fh_len, int fh_type) |
1b961ac0 CH |
1129 | { |
1130 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1131 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1132 | } |
1133 | ||
c39a7f84 TO |
1134 | /* |
1135 | * Try to release metadata pages (indirect blocks, directories) which are | |
1136 | * mapped via the block device. Since these pages could have journal heads | |
1137 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1138 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1139 | */ | |
0b8e58a1 AD |
1140 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1141 | gfp_t wait) | |
c39a7f84 TO |
1142 | { |
1143 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1144 | ||
1145 | WARN_ON(PageChecked(page)); | |
1146 | if (!page_has_buffers(page)) | |
1147 | return 0; | |
1148 | if (journal) | |
1149 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1150 | wait & ~__GFP_WAIT); | |
1151 | return try_to_free_buffers(page); | |
1152 | } | |
1153 | ||
ac27a0ec | 1154 | #ifdef CONFIG_QUOTA |
af5bc92d | 1155 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1156 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1157 | |
617ba13b MC |
1158 | static int ext4_write_dquot(struct dquot *dquot); |
1159 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1160 | static int ext4_release_dquot(struct dquot *dquot); | |
1161 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1162 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1163 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 1164 | struct path *path); |
ca0e05e4 | 1165 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1166 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1167 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1168 | size_t len, loff_t off); |
617ba13b | 1169 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1170 | const char *data, size_t len, loff_t off); |
1171 | ||
61e225dc | 1172 | static const struct dquot_operations ext4_quota_operations = { |
a9e7f447 | 1173 | #ifdef CONFIG_QUOTA |
60e58e0f | 1174 | .get_reserved_space = ext4_get_reserved_space, |
a9e7f447 | 1175 | #endif |
617ba13b MC |
1176 | .write_dquot = ext4_write_dquot, |
1177 | .acquire_dquot = ext4_acquire_dquot, | |
1178 | .release_dquot = ext4_release_dquot, | |
1179 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1180 | .write_info = ext4_write_info, |
1181 | .alloc_dquot = dquot_alloc, | |
1182 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1183 | }; |
1184 | ||
0d54b217 | 1185 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1186 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1187 | .quota_off = ext4_quota_off, |
287a8095 CH |
1188 | .quota_sync = dquot_quota_sync, |
1189 | .get_info = dquot_get_dqinfo, | |
1190 | .set_info = dquot_set_dqinfo, | |
1191 | .get_dqblk = dquot_get_dqblk, | |
1192 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1193 | }; |
1194 | #endif | |
1195 | ||
ee9b6d61 | 1196 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1197 | .alloc_inode = ext4_alloc_inode, |
1198 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1199 | .write_inode = ext4_write_inode, |
1200 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1201 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1202 | .evict_inode = ext4_evict_inode, |
617ba13b | 1203 | .put_super = ext4_put_super, |
617ba13b | 1204 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1205 | .freeze_fs = ext4_freeze, |
1206 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1207 | .statfs = ext4_statfs, |
1208 | .remount_fs = ext4_remount, | |
617ba13b | 1209 | .show_options = ext4_show_options, |
ac27a0ec | 1210 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1211 | .quota_read = ext4_quota_read, |
1212 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1213 | #endif |
c39a7f84 | 1214 | .bdev_try_to_free_page = bdev_try_to_free_page, |
ac27a0ec DK |
1215 | }; |
1216 | ||
9ca92389 TT |
1217 | static const struct super_operations ext4_nojournal_sops = { |
1218 | .alloc_inode = ext4_alloc_inode, | |
1219 | .destroy_inode = ext4_destroy_inode, | |
1220 | .write_inode = ext4_write_inode, | |
1221 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1222 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1223 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1224 | .write_super = ext4_write_super, |
1225 | .put_super = ext4_put_super, | |
1226 | .statfs = ext4_statfs, | |
1227 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1228 | .show_options = ext4_show_options, |
1229 | #ifdef CONFIG_QUOTA | |
1230 | .quota_read = ext4_quota_read, | |
1231 | .quota_write = ext4_quota_write, | |
1232 | #endif | |
1233 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1234 | }; | |
1235 | ||
39655164 | 1236 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1237 | .fh_to_dentry = ext4_fh_to_dentry, |
1238 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1239 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1240 | }; |
1241 | ||
1242 | enum { | |
1243 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1244 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1245 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1246 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1247 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1248 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1249 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1250 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1251 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1252 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1253 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1254 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1255 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1256 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
1449032b TT |
1257 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, |
1258 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, | |
5328e635 | 1259 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1260 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1261 | Opt_discard, Opt_nodiscard, |
bfff6873 | 1262 | Opt_init_inode_table, Opt_noinit_inode_table, |
ac27a0ec DK |
1263 | }; |
1264 | ||
a447c093 | 1265 | static const match_table_t tokens = { |
ac27a0ec DK |
1266 | {Opt_bsd_df, "bsddf"}, |
1267 | {Opt_minix_df, "minixdf"}, | |
1268 | {Opt_grpid, "grpid"}, | |
1269 | {Opt_grpid, "bsdgroups"}, | |
1270 | {Opt_nogrpid, "nogrpid"}, | |
1271 | {Opt_nogrpid, "sysvgroups"}, | |
1272 | {Opt_resgid, "resgid=%u"}, | |
1273 | {Opt_resuid, "resuid=%u"}, | |
1274 | {Opt_sb, "sb=%u"}, | |
1275 | {Opt_err_cont, "errors=continue"}, | |
1276 | {Opt_err_panic, "errors=panic"}, | |
1277 | {Opt_err_ro, "errors=remount-ro"}, | |
1278 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1279 | {Opt_debug, "debug"}, |
1280 | {Opt_oldalloc, "oldalloc"}, | |
1281 | {Opt_orlov, "orlov"}, | |
1282 | {Opt_user_xattr, "user_xattr"}, | |
1283 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1284 | {Opt_acl, "acl"}, | |
1285 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1286 | {Opt_noload, "noload"}, |
e3bb52ae | 1287 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1288 | {Opt_nobh, "nobh"}, |
1289 | {Opt_bh, "bh"}, | |
1290 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1291 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1292 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1293 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1294 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1295 | {Opt_journal_checksum, "journal_checksum"}, |
1296 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1297 | {Opt_abort, "abort"}, |
1298 | {Opt_data_journal, "data=journal"}, | |
1299 | {Opt_data_ordered, "data=ordered"}, | |
1300 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1301 | {Opt_data_err_abort, "data_err=abort"}, |
1302 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1303 | {Opt_offusrjquota, "usrjquota="}, |
1304 | {Opt_usrjquota, "usrjquota=%s"}, | |
1305 | {Opt_offgrpjquota, "grpjquota="}, | |
1306 | {Opt_grpjquota, "grpjquota=%s"}, | |
1307 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1308 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1309 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1310 | {Opt_grpquota, "grpquota"}, |
1311 | {Opt_noquota, "noquota"}, | |
1312 | {Opt_quota, "quota"}, | |
1313 | {Opt_usrquota, "usrquota"}, | |
1314 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1315 | {Opt_barrier, "barrier"}, |
1316 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1317 | {Opt_i_version, "i_version"}, |
c9de560d | 1318 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1319 | {Opt_resize, "resize"}, |
64769240 | 1320 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1321 | {Opt_nodelalloc, "nodelalloc"}, |
1449032b TT |
1322 | {Opt_mblk_io_submit, "mblk_io_submit"}, |
1323 | {Opt_nomblk_io_submit, "nomblk_io_submit"}, | |
6fd058f7 TT |
1324 | {Opt_block_validity, "block_validity"}, |
1325 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1326 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1327 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1328 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1329 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1330 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1331 | {Opt_dioread_nolock, "dioread_nolock"}, |
1332 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1333 | {Opt_discard, "discard"}, |
1334 | {Opt_nodiscard, "nodiscard"}, | |
bfff6873 LC |
1335 | {Opt_init_inode_table, "init_itable=%u"}, |
1336 | {Opt_init_inode_table, "init_itable"}, | |
1337 | {Opt_noinit_inode_table, "noinit_itable"}, | |
f3f12faa | 1338 | {Opt_err, NULL}, |
ac27a0ec DK |
1339 | }; |
1340 | ||
617ba13b | 1341 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1342 | { |
617ba13b | 1343 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1344 | char *options = (char *) *data; |
1345 | ||
1346 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1347 | return 1; /* Default location */ | |
0b8e58a1 | 1348 | |
ac27a0ec | 1349 | options += 3; |
0b8e58a1 | 1350 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1351 | sb_block = simple_strtoul(options, &options, 0); |
1352 | if (*options && *options != ',') { | |
4776004f | 1353 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1354 | (char *) *data); |
1355 | return 1; | |
1356 | } | |
1357 | if (*options == ',') | |
1358 | options++; | |
1359 | *data = (void *) options; | |
0b8e58a1 | 1360 | |
ac27a0ec DK |
1361 | return sb_block; |
1362 | } | |
1363 | ||
b3881f74 | 1364 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1365 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1366 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1367 | |
56c50f11 DM |
1368 | #ifdef CONFIG_QUOTA |
1369 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1370 | { | |
1371 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1372 | char *qname; | |
1373 | ||
1374 | if (sb_any_quota_loaded(sb) && | |
1375 | !sbi->s_qf_names[qtype]) { | |
1376 | ext4_msg(sb, KERN_ERR, | |
1377 | "Cannot change journaled " | |
1378 | "quota options when quota turned on"); | |
1379 | return 0; | |
1380 | } | |
1381 | qname = match_strdup(args); | |
1382 | if (!qname) { | |
1383 | ext4_msg(sb, KERN_ERR, | |
1384 | "Not enough memory for storing quotafile name"); | |
1385 | return 0; | |
1386 | } | |
1387 | if (sbi->s_qf_names[qtype] && | |
1388 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1389 | ext4_msg(sb, KERN_ERR, | |
1390 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1391 | kfree(qname); | |
1392 | return 0; | |
1393 | } | |
1394 | sbi->s_qf_names[qtype] = qname; | |
1395 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1396 | ext4_msg(sb, KERN_ERR, | |
1397 | "quotafile must be on filesystem root"); | |
1398 | kfree(sbi->s_qf_names[qtype]); | |
1399 | sbi->s_qf_names[qtype] = NULL; | |
1400 | return 0; | |
1401 | } | |
fd8c37ec | 1402 | set_opt(sb, QUOTA); |
56c50f11 DM |
1403 | return 1; |
1404 | } | |
1405 | ||
1406 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1407 | { | |
1408 | ||
1409 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1410 | ||
1411 | if (sb_any_quota_loaded(sb) && | |
1412 | sbi->s_qf_names[qtype]) { | |
1413 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1414 | " when quota turned on"); | |
1415 | return 0; | |
1416 | } | |
1417 | /* | |
1418 | * The space will be released later when all options are confirmed | |
1419 | * to be correct | |
1420 | */ | |
1421 | sbi->s_qf_names[qtype] = NULL; | |
1422 | return 1; | |
1423 | } | |
1424 | #endif | |
1425 | ||
2b2d6d01 | 1426 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1427 | unsigned long *journal_devnum, |
b3881f74 | 1428 | unsigned int *journal_ioprio, |
2b2d6d01 | 1429 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1430 | { |
617ba13b | 1431 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1432 | char *p; |
ac27a0ec DK |
1433 | substring_t args[MAX_OPT_ARGS]; |
1434 | int data_opt = 0; | |
1435 | int option; | |
1436 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1437 | int qfmt; |
ac27a0ec DK |
1438 | #endif |
1439 | ||
1440 | if (!options) | |
1441 | return 1; | |
1442 | ||
2b2d6d01 | 1443 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1444 | int token; |
1445 | if (!*p) | |
1446 | continue; | |
1447 | ||
15121c18 ES |
1448 | /* |
1449 | * Initialize args struct so we know whether arg was | |
1450 | * found; some options take optional arguments. | |
1451 | */ | |
7dc57615 | 1452 | args[0].to = args[0].from = NULL; |
ac27a0ec DK |
1453 | token = match_token(p, tokens, args); |
1454 | switch (token) { | |
1455 | case Opt_bsd_df: | |
437ca0fd | 1456 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1457 | clear_opt(sb, MINIX_DF); |
ac27a0ec DK |
1458 | break; |
1459 | case Opt_minix_df: | |
437ca0fd | 1460 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1461 | set_opt(sb, MINIX_DF); |
437ca0fd | 1462 | |
ac27a0ec DK |
1463 | break; |
1464 | case Opt_grpid: | |
437ca0fd | 1465 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1466 | set_opt(sb, GRPID); |
437ca0fd | 1467 | |
ac27a0ec DK |
1468 | break; |
1469 | case Opt_nogrpid: | |
437ca0fd | 1470 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
fd8c37ec | 1471 | clear_opt(sb, GRPID); |
437ca0fd | 1472 | |
ac27a0ec DK |
1473 | break; |
1474 | case Opt_resuid: | |
1475 | if (match_int(&args[0], &option)) | |
1476 | return 0; | |
1477 | sbi->s_resuid = option; | |
1478 | break; | |
1479 | case Opt_resgid: | |
1480 | if (match_int(&args[0], &option)) | |
1481 | return 0; | |
1482 | sbi->s_resgid = option; | |
1483 | break; | |
1484 | case Opt_sb: | |
1485 | /* handled by get_sb_block() instead of here */ | |
1486 | /* *sb_block = match_int(&args[0]); */ | |
1487 | break; | |
1488 | case Opt_err_panic: | |
fd8c37ec TT |
1489 | clear_opt(sb, ERRORS_CONT); |
1490 | clear_opt(sb, ERRORS_RO); | |
1491 | set_opt(sb, ERRORS_PANIC); | |
ac27a0ec DK |
1492 | break; |
1493 | case Opt_err_ro: | |
fd8c37ec TT |
1494 | clear_opt(sb, ERRORS_CONT); |
1495 | clear_opt(sb, ERRORS_PANIC); | |
1496 | set_opt(sb, ERRORS_RO); | |
ac27a0ec DK |
1497 | break; |
1498 | case Opt_err_cont: | |
fd8c37ec TT |
1499 | clear_opt(sb, ERRORS_RO); |
1500 | clear_opt(sb, ERRORS_PANIC); | |
1501 | set_opt(sb, ERRORS_CONT); | |
ac27a0ec DK |
1502 | break; |
1503 | case Opt_nouid32: | |
fd8c37ec | 1504 | set_opt(sb, NO_UID32); |
ac27a0ec | 1505 | break; |
ac27a0ec | 1506 | case Opt_debug: |
fd8c37ec | 1507 | set_opt(sb, DEBUG); |
ac27a0ec DK |
1508 | break; |
1509 | case Opt_oldalloc: | |
fd8c37ec | 1510 | set_opt(sb, OLDALLOC); |
ac27a0ec DK |
1511 | break; |
1512 | case Opt_orlov: | |
fd8c37ec | 1513 | clear_opt(sb, OLDALLOC); |
ac27a0ec | 1514 | break; |
03010a33 | 1515 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1516 | case Opt_user_xattr: |
fd8c37ec | 1517 | set_opt(sb, XATTR_USER); |
ac27a0ec DK |
1518 | break; |
1519 | case Opt_nouser_xattr: | |
fd8c37ec | 1520 | clear_opt(sb, XATTR_USER); |
ac27a0ec DK |
1521 | break; |
1522 | #else | |
1523 | case Opt_user_xattr: | |
1524 | case Opt_nouser_xattr: | |
b31e1552 | 1525 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1526 | break; |
1527 | #endif | |
03010a33 | 1528 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec | 1529 | case Opt_acl: |
fd8c37ec | 1530 | set_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1531 | break; |
1532 | case Opt_noacl: | |
fd8c37ec | 1533 | clear_opt(sb, POSIX_ACL); |
ac27a0ec DK |
1534 | break; |
1535 | #else | |
1536 | case Opt_acl: | |
1537 | case Opt_noacl: | |
b31e1552 | 1538 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1539 | break; |
1540 | #endif | |
ac27a0ec DK |
1541 | case Opt_journal_update: |
1542 | /* @@@ FIXME */ | |
1543 | /* Eventually we will want to be able to create | |
1544 | a journal file here. For now, only allow the | |
1545 | user to specify an existing inode to be the | |
1546 | journal file. */ | |
1547 | if (is_remount) { | |
b31e1552 ES |
1548 | ext4_msg(sb, KERN_ERR, |
1549 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1550 | return 0; |
1551 | } | |
fd8c37ec | 1552 | set_opt(sb, UPDATE_JOURNAL); |
ac27a0ec | 1553 | break; |
ac27a0ec DK |
1554 | case Opt_journal_dev: |
1555 | if (is_remount) { | |
b31e1552 ES |
1556 | ext4_msg(sb, KERN_ERR, |
1557 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1558 | return 0; |
1559 | } | |
1560 | if (match_int(&args[0], &option)) | |
1561 | return 0; | |
1562 | *journal_devnum = option; | |
1563 | break; | |
818d276c | 1564 | case Opt_journal_checksum: |
fd8c37ec | 1565 | set_opt(sb, JOURNAL_CHECKSUM); |
d4da6c9c | 1566 | break; |
818d276c | 1567 | case Opt_journal_async_commit: |
fd8c37ec TT |
1568 | set_opt(sb, JOURNAL_ASYNC_COMMIT); |
1569 | set_opt(sb, JOURNAL_CHECKSUM); | |
818d276c | 1570 | break; |
ac27a0ec | 1571 | case Opt_noload: |
fd8c37ec | 1572 | set_opt(sb, NOLOAD); |
ac27a0ec DK |
1573 | break; |
1574 | case Opt_commit: | |
1575 | if (match_int(&args[0], &option)) | |
1576 | return 0; | |
1577 | if (option < 0) | |
1578 | return 0; | |
1579 | if (option == 0) | |
cd02ff0b | 1580 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1581 | sbi->s_commit_interval = HZ * option; |
1582 | break; | |
30773840 TT |
1583 | case Opt_max_batch_time: |
1584 | if (match_int(&args[0], &option)) | |
1585 | return 0; | |
1586 | if (option < 0) | |
1587 | return 0; | |
1588 | if (option == 0) | |
1589 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1590 | sbi->s_max_batch_time = option; | |
1591 | break; | |
1592 | case Opt_min_batch_time: | |
1593 | if (match_int(&args[0], &option)) | |
1594 | return 0; | |
1595 | if (option < 0) | |
1596 | return 0; | |
1597 | sbi->s_min_batch_time = option; | |
1598 | break; | |
ac27a0ec | 1599 | case Opt_data_journal: |
617ba13b | 1600 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1601 | goto datacheck; |
1602 | case Opt_data_ordered: | |
617ba13b | 1603 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1604 | goto datacheck; |
1605 | case Opt_data_writeback: | |
617ba13b | 1606 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1607 | datacheck: |
1608 | if (is_remount) { | |
482a7425 | 1609 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1610 | ext4_msg(sb, KERN_ERR, |
1611 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1612 | return 0; |
1613 | } | |
1614 | } else { | |
fd8c37ec | 1615 | clear_opt(sb, DATA_FLAGS); |
ac27a0ec DK |
1616 | sbi->s_mount_opt |= data_opt; |
1617 | } | |
1618 | break; | |
5bf5683a | 1619 | case Opt_data_err_abort: |
fd8c37ec | 1620 | set_opt(sb, DATA_ERR_ABORT); |
5bf5683a HK |
1621 | break; |
1622 | case Opt_data_err_ignore: | |
fd8c37ec | 1623 | clear_opt(sb, DATA_ERR_ABORT); |
5bf5683a | 1624 | break; |
ac27a0ec DK |
1625 | #ifdef CONFIG_QUOTA |
1626 | case Opt_usrjquota: | |
56c50f11 | 1627 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1628 | return 0; |
56c50f11 DM |
1629 | break; |
1630 | case Opt_grpjquota: | |
1631 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1632 | return 0; |
ac27a0ec DK |
1633 | break; |
1634 | case Opt_offusrjquota: | |
56c50f11 DM |
1635 | if (!clear_qf_name(sb, USRQUOTA)) |
1636 | return 0; | |
1637 | break; | |
ac27a0ec | 1638 | case Opt_offgrpjquota: |
56c50f11 | 1639 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1640 | return 0; |
ac27a0ec | 1641 | break; |
56c50f11 | 1642 | |
ac27a0ec | 1643 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1644 | qfmt = QFMT_VFS_OLD; |
1645 | goto set_qf_format; | |
ac27a0ec | 1646 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1647 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1648 | goto set_qf_format; |
1649 | case Opt_jqfmt_vfsv1: | |
1650 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1651 | set_qf_format: |
17bd13b3 | 1652 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1653 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1654 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1655 | "journaled quota options when " |
b31e1552 | 1656 | "quota turned on"); |
dfc5d03f JK |
1657 | return 0; |
1658 | } | |
1659 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1660 | break; |
1661 | case Opt_quota: | |
1662 | case Opt_usrquota: | |
fd8c37ec TT |
1663 | set_opt(sb, QUOTA); |
1664 | set_opt(sb, USRQUOTA); | |
ac27a0ec DK |
1665 | break; |
1666 | case Opt_grpquota: | |
fd8c37ec TT |
1667 | set_opt(sb, QUOTA); |
1668 | set_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1669 | break; |
1670 | case Opt_noquota: | |
17bd13b3 | 1671 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1672 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1673 | "options when quota turned on"); | |
ac27a0ec DK |
1674 | return 0; |
1675 | } | |
fd8c37ec TT |
1676 | clear_opt(sb, QUOTA); |
1677 | clear_opt(sb, USRQUOTA); | |
1678 | clear_opt(sb, GRPQUOTA); | |
ac27a0ec DK |
1679 | break; |
1680 | #else | |
1681 | case Opt_quota: | |
1682 | case Opt_usrquota: | |
1683 | case Opt_grpquota: | |
b31e1552 ES |
1684 | ext4_msg(sb, KERN_ERR, |
1685 | "quota options not supported"); | |
cd59e7b9 | 1686 | break; |
ac27a0ec DK |
1687 | case Opt_usrjquota: |
1688 | case Opt_grpjquota: | |
1689 | case Opt_offusrjquota: | |
1690 | case Opt_offgrpjquota: | |
1691 | case Opt_jqfmt_vfsold: | |
1692 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1693 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1694 | ext4_msg(sb, KERN_ERR, |
1695 | "journaled quota options not supported"); | |
ac27a0ec DK |
1696 | break; |
1697 | case Opt_noquota: | |
1698 | break; | |
1699 | #endif | |
1700 | case Opt_abort: | |
4ab2f15b | 1701 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1702 | break; |
06705bff | 1703 | case Opt_nobarrier: |
fd8c37ec | 1704 | clear_opt(sb, BARRIER); |
06705bff | 1705 | break; |
ac27a0ec | 1706 | case Opt_barrier: |
15121c18 ES |
1707 | if (args[0].from) { |
1708 | if (match_int(&args[0], &option)) | |
1709 | return 0; | |
1710 | } else | |
1711 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec | 1712 | if (option) |
fd8c37ec | 1713 | set_opt(sb, BARRIER); |
ac27a0ec | 1714 | else |
fd8c37ec | 1715 | clear_opt(sb, BARRIER); |
ac27a0ec DK |
1716 | break; |
1717 | case Opt_ignore: | |
1718 | break; | |
1719 | case Opt_resize: | |
1720 | if (!is_remount) { | |
b31e1552 ES |
1721 | ext4_msg(sb, KERN_ERR, |
1722 | "resize option only available " | |
1723 | "for remount"); | |
ac27a0ec DK |
1724 | return 0; |
1725 | } | |
1726 | if (match_int(&args[0], &option) != 0) | |
1727 | return 0; | |
1728 | *n_blocks_count = option; | |
1729 | break; | |
1730 | case Opt_nobh: | |
206f7ab4 CH |
1731 | ext4_msg(sb, KERN_WARNING, |
1732 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1733 | break; |
1734 | case Opt_bh: | |
206f7ab4 CH |
1735 | ext4_msg(sb, KERN_WARNING, |
1736 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1737 | break; |
25ec56b5 | 1738 | case Opt_i_version: |
fd8c37ec | 1739 | set_opt(sb, I_VERSION); |
25ec56b5 JNC |
1740 | sb->s_flags |= MS_I_VERSION; |
1741 | break; | |
dd919b98 | 1742 | case Opt_nodelalloc: |
fd8c37ec | 1743 | clear_opt(sb, DELALLOC); |
dd919b98 | 1744 | break; |
1449032b | 1745 | case Opt_mblk_io_submit: |
fd8c37ec | 1746 | set_opt(sb, MBLK_IO_SUBMIT); |
1449032b TT |
1747 | break; |
1748 | case Opt_nomblk_io_submit: | |
fd8c37ec | 1749 | clear_opt(sb, MBLK_IO_SUBMIT); |
1449032b | 1750 | break; |
c9de560d AT |
1751 | case Opt_stripe: |
1752 | if (match_int(&args[0], &option)) | |
1753 | return 0; | |
1754 | if (option < 0) | |
1755 | return 0; | |
1756 | sbi->s_stripe = option; | |
1757 | break; | |
64769240 | 1758 | case Opt_delalloc: |
fd8c37ec | 1759 | set_opt(sb, DELALLOC); |
64769240 | 1760 | break; |
6fd058f7 | 1761 | case Opt_block_validity: |
fd8c37ec | 1762 | set_opt(sb, BLOCK_VALIDITY); |
6fd058f7 TT |
1763 | break; |
1764 | case Opt_noblock_validity: | |
fd8c37ec | 1765 | clear_opt(sb, BLOCK_VALIDITY); |
6fd058f7 | 1766 | break; |
240799cd TT |
1767 | case Opt_inode_readahead_blks: |
1768 | if (match_int(&args[0], &option)) | |
1769 | return 0; | |
1770 | if (option < 0 || option > (1 << 30)) | |
1771 | return 0; | |
5dbd571d | 1772 | if (option && !is_power_of_2(option)) { |
b31e1552 ES |
1773 | ext4_msg(sb, KERN_ERR, |
1774 | "EXT4-fs: inode_readahead_blks" | |
1775 | " must be a power of 2"); | |
3197ebdb TT |
1776 | return 0; |
1777 | } | |
240799cd TT |
1778 | sbi->s_inode_readahead_blks = option; |
1779 | break; | |
b3881f74 TT |
1780 | case Opt_journal_ioprio: |
1781 | if (match_int(&args[0], &option)) | |
1782 | return 0; | |
1783 | if (option < 0 || option > 7) | |
1784 | break; | |
1785 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1786 | option); | |
1787 | break; | |
06705bff | 1788 | case Opt_noauto_da_alloc: |
fd8c37ec | 1789 | set_opt(sb, NO_AUTO_DA_ALLOC); |
06705bff | 1790 | break; |
afd4672d | 1791 | case Opt_auto_da_alloc: |
15121c18 ES |
1792 | if (args[0].from) { |
1793 | if (match_int(&args[0], &option)) | |
1794 | return 0; | |
1795 | } else | |
1796 | option = 1; /* No argument, default to 1 */ | |
afd4672d | 1797 | if (option) |
fd8c37ec | 1798 | clear_opt(sb, NO_AUTO_DA_ALLOC); |
afd4672d | 1799 | else |
fd8c37ec | 1800 | set_opt(sb,NO_AUTO_DA_ALLOC); |
afd4672d | 1801 | break; |
5328e635 | 1802 | case Opt_discard: |
fd8c37ec | 1803 | set_opt(sb, DISCARD); |
5328e635 ES |
1804 | break; |
1805 | case Opt_nodiscard: | |
fd8c37ec | 1806 | clear_opt(sb, DISCARD); |
5328e635 | 1807 | break; |
744692dc | 1808 | case Opt_dioread_nolock: |
fd8c37ec | 1809 | set_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
1810 | break; |
1811 | case Opt_dioread_lock: | |
fd8c37ec | 1812 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc | 1813 | break; |
bfff6873 | 1814 | case Opt_init_inode_table: |
fd8c37ec | 1815 | set_opt(sb, INIT_INODE_TABLE); |
bfff6873 LC |
1816 | if (args[0].from) { |
1817 | if (match_int(&args[0], &option)) | |
1818 | return 0; | |
1819 | } else | |
1820 | option = EXT4_DEF_LI_WAIT_MULT; | |
1821 | if (option < 0) | |
1822 | return 0; | |
1823 | sbi->s_li_wait_mult = option; | |
1824 | break; | |
1825 | case Opt_noinit_inode_table: | |
fd8c37ec | 1826 | clear_opt(sb, INIT_INODE_TABLE); |
bfff6873 | 1827 | break; |
ac27a0ec | 1828 | default: |
b31e1552 ES |
1829 | ext4_msg(sb, KERN_ERR, |
1830 | "Unrecognized mount option \"%s\" " | |
1831 | "or missing value", p); | |
ac27a0ec DK |
1832 | return 0; |
1833 | } | |
1834 | } | |
1835 | #ifdef CONFIG_QUOTA | |
1836 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1837 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
fd8c37ec | 1838 | clear_opt(sb, USRQUOTA); |
ac27a0ec | 1839 | |
482a7425 | 1840 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
fd8c37ec | 1841 | clear_opt(sb, GRPQUOTA); |
ac27a0ec | 1842 | |
56c50f11 | 1843 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1844 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1845 | "format mixing"); | |
ac27a0ec DK |
1846 | return 0; |
1847 | } | |
1848 | ||
1849 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1850 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1851 | "not specified"); | |
ac27a0ec DK |
1852 | return 0; |
1853 | } | |
1854 | } else { | |
1855 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1856 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1857 | "specified with no journaling " |
b31e1552 | 1858 | "enabled"); |
ac27a0ec DK |
1859 | return 0; |
1860 | } | |
1861 | } | |
1862 | #endif | |
1863 | return 1; | |
1864 | } | |
1865 | ||
617ba13b | 1866 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1867 | int read_only) |
1868 | { | |
617ba13b | 1869 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1870 | int res = 0; |
1871 | ||
617ba13b | 1872 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1873 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1874 | "forcing read-only mode"); | |
ac27a0ec DK |
1875 | res = MS_RDONLY; |
1876 | } | |
1877 | if (read_only) | |
1878 | return res; | |
617ba13b | 1879 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1880 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1881 | "running e2fsck is recommended"); | |
617ba13b | 1882 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1883 | ext4_msg(sb, KERN_WARNING, |
1884 | "warning: mounting fs with errors, " | |
1885 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1886 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1887 | le16_to_cpu(es->s_mnt_count) >= | |
1888 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1889 | ext4_msg(sb, KERN_WARNING, |
1890 | "warning: maximal mount count reached, " | |
1891 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1892 | else if (le32_to_cpu(es->s_checkinterval) && |
1893 | (le32_to_cpu(es->s_lastcheck) + | |
1894 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1895 | ext4_msg(sb, KERN_WARNING, |
1896 | "warning: checktime reached, " | |
1897 | "running e2fsck is recommended"); | |
0b8e58a1 | 1898 | if (!sbi->s_journal) |
0390131b | 1899 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1900 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1901 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1902 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1903 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1904 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1905 | if (sbi->s_journal) |
1906 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1907 | |
e2d67052 | 1908 | ext4_commit_super(sb, 1); |
ac27a0ec | 1909 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1910 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 1911 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
1912 | sb->s_blocksize, |
1913 | sbi->s_groups_count, | |
617ba13b MC |
1914 | EXT4_BLOCKS_PER_GROUP(sb), |
1915 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 1916 | sbi->s_mount_opt, sbi->s_mount_opt2); |
ac27a0ec | 1917 | |
ac27a0ec DK |
1918 | return res; |
1919 | } | |
1920 | ||
772cb7c8 JS |
1921 | static int ext4_fill_flex_info(struct super_block *sb) |
1922 | { | |
1923 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1924 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1925 | ext4_group_t flex_group_count; |
1926 | ext4_group_t flex_group; | |
1927 | int groups_per_flex = 0; | |
c5ca7c76 | 1928 | size_t size; |
772cb7c8 JS |
1929 | int i; |
1930 | ||
503358ae TT |
1931 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1932 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1933 | ||
1934 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1935 | sbi->s_log_groups_per_flex = 0; |
1936 | return 1; | |
1937 | } | |
1938 | ||
c62a11fd FB |
1939 | /* We allocate both existing and potentially added groups */ |
1940 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1941 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1942 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1943 | size = flex_group_count * sizeof(struct flex_groups); |
1944 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1945 | if (sbi->s_flex_groups == NULL) { | |
94de56ab JP |
1946 | sbi->s_flex_groups = vzalloc(size); |
1947 | if (sbi->s_flex_groups == NULL) { | |
1948 | ext4_msg(sb, KERN_ERR, | |
1949 | "not enough memory for %u flex groups", | |
1950 | flex_group_count); | |
1951 | goto failed; | |
1952 | } | |
772cb7c8 | 1953 | } |
772cb7c8 | 1954 | |
772cb7c8 | 1955 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1956 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1957 | |
1958 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1959 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1960 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1961 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1962 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1963 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1964 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1965 | } |
1966 | ||
1967 | return 1; | |
1968 | failed: | |
1969 | return 0; | |
1970 | } | |
1971 | ||
717d50e4 AD |
1972 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1973 | struct ext4_group_desc *gdp) | |
1974 | { | |
1975 | __u16 crc = 0; | |
1976 | ||
1977 | if (sbi->s_es->s_feature_ro_compat & | |
1978 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1979 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1980 | __le32 le_group = cpu_to_le32(block_group); | |
1981 | ||
1982 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1983 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1984 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1985 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1986 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1987 | if ((sbi->s_es->s_feature_incompat & | |
1988 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1989 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1990 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1991 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1992 | offset); | |
1993 | } | |
1994 | ||
1995 | return cpu_to_le16(crc); | |
1996 | } | |
1997 | ||
1998 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1999 | struct ext4_group_desc *gdp) | |
2000 | { | |
2001 | if ((sbi->s_es->s_feature_ro_compat & | |
2002 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
2003 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
2004 | return 0; | |
2005 | ||
2006 | return 1; | |
2007 | } | |
2008 | ||
ac27a0ec | 2009 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
2010 | static int ext4_check_descriptors(struct super_block *sb, |
2011 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 2012 | { |
617ba13b MC |
2013 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2014 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
2015 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
2016 | ext4_fsblk_t block_bitmap; |
2017 | ext4_fsblk_t inode_bitmap; | |
2018 | ext4_fsblk_t inode_table; | |
ce421581 | 2019 | int flexbg_flag = 0; |
bfff6873 | 2020 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 2021 | |
ce421581 JS |
2022 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2023 | flexbg_flag = 1; | |
2024 | ||
af5bc92d | 2025 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2026 | |
197cd65a AM |
2027 | for (i = 0; i < sbi->s_groups_count; i++) { |
2028 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2029 | ||
ce421581 | 2030 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2031 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2032 | else |
2033 | last_block = first_block + | |
617ba13b | 2034 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2035 | |
bfff6873 LC |
2036 | if ((grp == sbi->s_groups_count) && |
2037 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2038 | grp = i; | |
2039 | ||
8fadc143 | 2040 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2041 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2042 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2043 | "Block bitmap for group %u not in group " |
b31e1552 | 2044 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2045 | return 0; |
2046 | } | |
8fadc143 | 2047 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2048 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2049 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2050 | "Inode bitmap for group %u not in group " |
b31e1552 | 2051 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2052 | return 0; |
2053 | } | |
8fadc143 | 2054 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2055 | if (inode_table < first_block || |
2b2d6d01 | 2056 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2057 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2058 | "Inode table for group %u not in group " |
b31e1552 | 2059 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2060 | return 0; |
2061 | } | |
955ce5f5 | 2062 | ext4_lock_group(sb, i); |
717d50e4 | 2063 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2064 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2065 | "Checksum for group %u failed (%u!=%u)", | |
2066 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2067 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2068 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2069 | ext4_unlock_group(sb, i); |
8a266467 | 2070 | return 0; |
7ee1ec4c | 2071 | } |
717d50e4 | 2072 | } |
955ce5f5 | 2073 | ext4_unlock_group(sb, i); |
ce421581 JS |
2074 | if (!flexbg_flag) |
2075 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2076 | } |
bfff6873 LC |
2077 | if (NULL != first_not_zeroed) |
2078 | *first_not_zeroed = grp; | |
ac27a0ec | 2079 | |
bd81d8ee | 2080 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 2081 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2082 | return 1; |
2083 | } | |
2084 | ||
617ba13b | 2085 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2086 | * the superblock) which were deleted from all directories, but held open by |
2087 | * a process at the time of a crash. We walk the list and try to delete these | |
2088 | * inodes at recovery time (only with a read-write filesystem). | |
2089 | * | |
2090 | * In order to keep the orphan inode chain consistent during traversal (in | |
2091 | * case of crash during recovery), we link each inode into the superblock | |
2092 | * orphan list_head and handle it the same way as an inode deletion during | |
2093 | * normal operation (which journals the operations for us). | |
2094 | * | |
2095 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2096 | * accidentally point at an in-use or already deleted inode. The worst that | |
2097 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2098 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2099 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2100 | * inode cleanup for us, so we can safely abort without any further action. | |
2101 | */ | |
2b2d6d01 TT |
2102 | static void ext4_orphan_cleanup(struct super_block *sb, |
2103 | struct ext4_super_block *es) | |
ac27a0ec DK |
2104 | { |
2105 | unsigned int s_flags = sb->s_flags; | |
2106 | int nr_orphans = 0, nr_truncates = 0; | |
2107 | #ifdef CONFIG_QUOTA | |
2108 | int i; | |
2109 | #endif | |
2110 | if (!es->s_last_orphan) { | |
2111 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2112 | return; | |
2113 | } | |
2114 | ||
a8f48a95 | 2115 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2116 | ext4_msg(sb, KERN_ERR, "write access " |
2117 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2118 | return; |
2119 | } | |
2120 | ||
d39195c3 AG |
2121 | /* Check if feature set would not allow a r/w mount */ |
2122 | if (!ext4_feature_set_ok(sb, 0)) { | |
2123 | ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " | |
2124 | "unknown ROCOMPAT features"); | |
2125 | return; | |
2126 | } | |
2127 | ||
617ba13b | 2128 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2129 | if (es->s_last_orphan) |
2130 | jbd_debug(1, "Errors on filesystem, " | |
2131 | "clearing orphan list.\n"); | |
2132 | es->s_last_orphan = 0; | |
2133 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2134 | return; | |
2135 | } | |
2136 | ||
2137 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2138 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2139 | sb->s_flags &= ~MS_RDONLY; |
2140 | } | |
2141 | #ifdef CONFIG_QUOTA | |
2142 | /* Needed for iput() to work correctly and not trash data */ | |
2143 | sb->s_flags |= MS_ACTIVE; | |
2144 | /* Turn on quotas so that they are updated correctly */ | |
2145 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2146 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2147 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2148 | if (ret < 0) |
b31e1552 ES |
2149 | ext4_msg(sb, KERN_ERR, |
2150 | "Cannot turn on journaled " | |
2151 | "quota: error %d", ret); | |
ac27a0ec DK |
2152 | } |
2153 | } | |
2154 | #endif | |
2155 | ||
2156 | while (es->s_last_orphan) { | |
2157 | struct inode *inode; | |
2158 | ||
97bd42b9 JB |
2159 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2160 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2161 | es->s_last_orphan = 0; |
2162 | break; | |
2163 | } | |
2164 | ||
617ba13b | 2165 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2166 | dquot_initialize(inode); |
ac27a0ec | 2167 | if (inode->i_nlink) { |
b31e1552 ES |
2168 | ext4_msg(sb, KERN_DEBUG, |
2169 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2170 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2171 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2172 | inode->i_ino, inode->i_size); |
617ba13b | 2173 | ext4_truncate(inode); |
ac27a0ec DK |
2174 | nr_truncates++; |
2175 | } else { | |
b31e1552 ES |
2176 | ext4_msg(sb, KERN_DEBUG, |
2177 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2178 | __func__, inode->i_ino); |
ac27a0ec DK |
2179 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2180 | inode->i_ino); | |
2181 | nr_orphans++; | |
2182 | } | |
2183 | iput(inode); /* The delete magic happens here! */ | |
2184 | } | |
2185 | ||
2b2d6d01 | 2186 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2187 | |
2188 | if (nr_orphans) | |
b31e1552 ES |
2189 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2190 | PLURAL(nr_orphans)); | |
ac27a0ec | 2191 | if (nr_truncates) |
b31e1552 ES |
2192 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2193 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2194 | #ifdef CONFIG_QUOTA |
2195 | /* Turn quotas off */ | |
2196 | for (i = 0; i < MAXQUOTAS; i++) { | |
2197 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2198 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2199 | } |
2200 | #endif | |
2201 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2202 | } | |
0b8e58a1 | 2203 | |
cd2291a4 ES |
2204 | /* |
2205 | * Maximal extent format file size. | |
2206 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2207 | * extent format containers, within a sector_t, and within i_blocks | |
2208 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2209 | * so that won't be a limiting factor. | |
2210 | * | |
2211 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2212 | */ | |
f287a1a5 | 2213 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2214 | { |
2215 | loff_t res; | |
2216 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2217 | ||
2218 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2219 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2220 | /* |
90c699a9 | 2221 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2222 | * i_block represent total blocks in 512 bytes |
2223 | * 32 == size of vfs inode i_blocks * 8 | |
2224 | */ | |
2225 | upper_limit = (1LL << 32) - 1; | |
2226 | ||
2227 | /* total blocks in file system block size */ | |
2228 | upper_limit >>= (blkbits - 9); | |
2229 | upper_limit <<= blkbits; | |
2230 | } | |
2231 | ||
2232 | /* 32-bit extent-start container, ee_block */ | |
2233 | res = 1LL << 32; | |
2234 | res <<= blkbits; | |
2235 | res -= 1; | |
2236 | ||
2237 | /* Sanity check against vm- & vfs- imposed limits */ | |
2238 | if (res > upper_limit) | |
2239 | res = upper_limit; | |
2240 | ||
2241 | return res; | |
2242 | } | |
ac27a0ec | 2243 | |
ac27a0ec | 2244 | /* |
cd2291a4 | 2245 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2246 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2247 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2248 | */ |
f287a1a5 | 2249 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2250 | { |
617ba13b | 2251 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2252 | int meta_blocks; |
2253 | loff_t upper_limit; | |
0b8e58a1 AD |
2254 | /* This is calculated to be the largest file size for a dense, block |
2255 | * mapped file such that the file's total number of 512-byte sectors, | |
2256 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2257 | * | |
2258 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2259 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2260 | */ |
2261 | ||
f287a1a5 | 2262 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2263 | /* |
90c699a9 | 2264 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2265 | * the inode i_block field represents total file blocks in |
2266 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2267 | */ |
2268 | upper_limit = (1LL << 32) - 1; | |
2269 | ||
2270 | /* total blocks in file system block size */ | |
2271 | upper_limit >>= (bits - 9); | |
2272 | ||
2273 | } else { | |
8180a562 AK |
2274 | /* |
2275 | * We use 48 bit ext4_inode i_blocks | |
2276 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2277 | * represent total number of blocks in | |
2278 | * file system block size | |
2279 | */ | |
0fc1b451 AK |
2280 | upper_limit = (1LL << 48) - 1; |
2281 | ||
0fc1b451 AK |
2282 | } |
2283 | ||
2284 | /* indirect blocks */ | |
2285 | meta_blocks = 1; | |
2286 | /* double indirect blocks */ | |
2287 | meta_blocks += 1 + (1LL << (bits-2)); | |
2288 | /* tripple indirect blocks */ | |
2289 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2290 | ||
2291 | upper_limit -= meta_blocks; | |
2292 | upper_limit <<= bits; | |
ac27a0ec DK |
2293 | |
2294 | res += 1LL << (bits-2); | |
2295 | res += 1LL << (2*(bits-2)); | |
2296 | res += 1LL << (3*(bits-2)); | |
2297 | res <<= bits; | |
2298 | if (res > upper_limit) | |
2299 | res = upper_limit; | |
0fc1b451 AK |
2300 | |
2301 | if (res > MAX_LFS_FILESIZE) | |
2302 | res = MAX_LFS_FILESIZE; | |
2303 | ||
ac27a0ec DK |
2304 | return res; |
2305 | } | |
2306 | ||
617ba13b | 2307 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2308 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2309 | { |
617ba13b | 2310 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2311 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2312 | int has_super = 0; |
2313 | ||
2314 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2315 | ||
617ba13b | 2316 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2317 | nr < first_meta_bg) |
70bbb3e0 | 2318 | return logical_sb_block + nr + 1; |
ac27a0ec | 2319 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2320 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2321 | has_super = 1; |
0b8e58a1 | 2322 | |
617ba13b | 2323 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2324 | } |
2325 | ||
c9de560d AT |
2326 | /** |
2327 | * ext4_get_stripe_size: Get the stripe size. | |
2328 | * @sbi: In memory super block info | |
2329 | * | |
2330 | * If we have specified it via mount option, then | |
2331 | * use the mount option value. If the value specified at mount time is | |
2332 | * greater than the blocks per group use the super block value. | |
2333 | * If the super block value is greater than blocks per group return 0. | |
2334 | * Allocator needs it be less than blocks per group. | |
2335 | * | |
2336 | */ | |
2337 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2338 | { | |
2339 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2340 | unsigned long stripe_width = | |
2341 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2342 | ||
2343 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2344 | return sbi->s_stripe; | |
2345 | ||
2346 | if (stripe_width <= sbi->s_blocks_per_group) | |
2347 | return stripe_width; | |
2348 | ||
2349 | if (stride <= sbi->s_blocks_per_group) | |
2350 | return stride; | |
2351 | ||
2352 | return 0; | |
2353 | } | |
ac27a0ec | 2354 | |
3197ebdb TT |
2355 | /* sysfs supprt */ |
2356 | ||
2357 | struct ext4_attr { | |
2358 | struct attribute attr; | |
2359 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2360 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2361 | const char *, size_t); |
2362 | int offset; | |
2363 | }; | |
2364 | ||
2365 | static int parse_strtoul(const char *buf, | |
2366 | unsigned long max, unsigned long *value) | |
2367 | { | |
2368 | char *endp; | |
2369 | ||
e7d2860b AGR |
2370 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2371 | endp = skip_spaces(endp); | |
3197ebdb TT |
2372 | if (*endp || *value > max) |
2373 | return -EINVAL; | |
2374 | ||
2375 | return 0; | |
2376 | } | |
2377 | ||
2378 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2379 | struct ext4_sb_info *sbi, | |
2380 | char *buf) | |
2381 | { | |
2382 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2383 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2384 | } | |
2385 | ||
2386 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2387 | struct ext4_sb_info *sbi, char *buf) | |
2388 | { | |
2389 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2390 | ||
f613dfcb TT |
2391 | if (!sb->s_bdev->bd_part) |
2392 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2393 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2394 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2395 | sbi->s_sectors_written_start) >> 1); | |
2396 | } | |
2397 | ||
2398 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2399 | struct ext4_sb_info *sbi, char *buf) | |
2400 | { | |
2401 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2402 | ||
f613dfcb TT |
2403 | if (!sb->s_bdev->bd_part) |
2404 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2405 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2406 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2407 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2408 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2409 | } |
2410 | ||
2411 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2412 | struct ext4_sb_info *sbi, | |
2413 | const char *buf, size_t count) | |
2414 | { | |
2415 | unsigned long t; | |
2416 | ||
2417 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2418 | return -EINVAL; | |
2419 | ||
5dbd571d | 2420 | if (t && !is_power_of_2(t)) |
3197ebdb TT |
2421 | return -EINVAL; |
2422 | ||
2423 | sbi->s_inode_readahead_blks = t; | |
2424 | return count; | |
2425 | } | |
2426 | ||
2427 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2428 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2429 | { |
2430 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2431 | ||
2432 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2433 | } | |
2434 | ||
2435 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2436 | struct ext4_sb_info *sbi, | |
2437 | const char *buf, size_t count) | |
2438 | { | |
2439 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2440 | unsigned long t; | |
2441 | ||
2442 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2443 | return -EINVAL; | |
2444 | *ui = t; | |
2445 | return count; | |
2446 | } | |
2447 | ||
2448 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2449 | static struct ext4_attr ext4_attr_##_name = { \ | |
2450 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2451 | .show = _show, \ | |
2452 | .store = _store, \ | |
2453 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2454 | } | |
2455 | #define EXT4_ATTR(name, mode, show, store) \ | |
2456 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2457 | ||
857ac889 | 2458 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2459 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2460 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2461 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2462 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2463 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2464 | ||
2465 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2466 | EXT4_RO_ATTR(session_write_kbytes); | |
2467 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2468 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2469 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2470 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2471 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2472 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2473 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2474 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2475 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2476 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2477 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2478 | |
2479 | static struct attribute *ext4_attrs[] = { | |
2480 | ATTR_LIST(delayed_allocation_blocks), | |
2481 | ATTR_LIST(session_write_kbytes), | |
2482 | ATTR_LIST(lifetime_write_kbytes), | |
2483 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2484 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2485 | ATTR_LIST(mb_stats), |
2486 | ATTR_LIST(mb_max_to_scan), | |
2487 | ATTR_LIST(mb_min_to_scan), | |
2488 | ATTR_LIST(mb_order2_req), | |
2489 | ATTR_LIST(mb_stream_req), | |
2490 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2491 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2492 | NULL, |
2493 | }; | |
2494 | ||
857ac889 LC |
2495 | /* Features this copy of ext4 supports */ |
2496 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2497 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2498 | |
2499 | static struct attribute *ext4_feat_attrs[] = { | |
2500 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2501 | ATTR_LIST(batched_discard), |
857ac889 LC |
2502 | NULL, |
2503 | }; | |
2504 | ||
3197ebdb TT |
2505 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2506 | struct attribute *attr, char *buf) | |
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->show ? a->show(a, sbi, buf) : 0; | |
2513 | } | |
2514 | ||
2515 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2516 | struct attribute *attr, | |
2517 | const char *buf, size_t len) | |
2518 | { | |
2519 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2520 | s_kobj); | |
2521 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2522 | ||
2523 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2524 | } | |
2525 | ||
2526 | static void ext4_sb_release(struct kobject *kobj) | |
2527 | { | |
2528 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2529 | s_kobj); | |
2530 | complete(&sbi->s_kobj_unregister); | |
2531 | } | |
2532 | ||
52cf25d0 | 2533 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2534 | .show = ext4_attr_show, |
2535 | .store = ext4_attr_store, | |
2536 | }; | |
2537 | ||
2538 | static struct kobj_type ext4_ktype = { | |
2539 | .default_attrs = ext4_attrs, | |
2540 | .sysfs_ops = &ext4_attr_ops, | |
2541 | .release = ext4_sb_release, | |
2542 | }; | |
2543 | ||
857ac889 LC |
2544 | static void ext4_feat_release(struct kobject *kobj) |
2545 | { | |
2546 | complete(&ext4_feat->f_kobj_unregister); | |
2547 | } | |
2548 | ||
2549 | static struct kobj_type ext4_feat_ktype = { | |
2550 | .default_attrs = ext4_feat_attrs, | |
2551 | .sysfs_ops = &ext4_attr_ops, | |
2552 | .release = ext4_feat_release, | |
2553 | }; | |
2554 | ||
a13fb1a4 ES |
2555 | /* |
2556 | * Check whether this filesystem can be mounted based on | |
2557 | * the features present and the RDONLY/RDWR mount requested. | |
2558 | * Returns 1 if this filesystem can be mounted as requested, | |
2559 | * 0 if it cannot be. | |
2560 | */ | |
2561 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2562 | { | |
2563 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2564 | ext4_msg(sb, KERN_ERR, | |
2565 | "Couldn't mount because of " | |
2566 | "unsupported optional features (%x)", | |
2567 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2568 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2569 | return 0; | |
2570 | } | |
2571 | ||
2572 | if (readonly) | |
2573 | return 1; | |
2574 | ||
2575 | /* Check that feature set is OK for a read-write mount */ | |
2576 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2577 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2578 | "unsupported optional features (%x)", | |
2579 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2580 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2581 | return 0; | |
2582 | } | |
2583 | /* | |
2584 | * Large file size enabled file system can only be mounted | |
2585 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2586 | */ | |
2587 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2588 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2589 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2590 | "cannot be mounted RDWR without " | |
2591 | "CONFIG_LBDAF"); | |
2592 | return 0; | |
2593 | } | |
2594 | } | |
2595 | return 1; | |
2596 | } | |
2597 | ||
66e61a9e TT |
2598 | /* |
2599 | * This function is called once a day if we have errors logged | |
2600 | * on the file system | |
2601 | */ | |
2602 | static void print_daily_error_info(unsigned long arg) | |
2603 | { | |
2604 | struct super_block *sb = (struct super_block *) arg; | |
2605 | struct ext4_sb_info *sbi; | |
2606 | struct ext4_super_block *es; | |
2607 | ||
2608 | sbi = EXT4_SB(sb); | |
2609 | es = sbi->s_es; | |
2610 | ||
2611 | if (es->s_error_count) | |
2612 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2613 | le32_to_cpu(es->s_error_count)); | |
2614 | if (es->s_first_error_time) { | |
2615 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2616 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2617 | (int) sizeof(es->s_first_error_func), | |
2618 | es->s_first_error_func, | |
2619 | le32_to_cpu(es->s_first_error_line)); | |
2620 | if (es->s_first_error_ino) | |
2621 | printk(": inode %u", | |
2622 | le32_to_cpu(es->s_first_error_ino)); | |
2623 | if (es->s_first_error_block) | |
2624 | printk(": block %llu", (unsigned long long) | |
2625 | le64_to_cpu(es->s_first_error_block)); | |
2626 | printk("\n"); | |
2627 | } | |
2628 | if (es->s_last_error_time) { | |
2629 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2630 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2631 | (int) sizeof(es->s_last_error_func), | |
2632 | es->s_last_error_func, | |
2633 | le32_to_cpu(es->s_last_error_line)); | |
2634 | if (es->s_last_error_ino) | |
2635 | printk(": inode %u", | |
2636 | le32_to_cpu(es->s_last_error_ino)); | |
2637 | if (es->s_last_error_block) | |
2638 | printk(": block %llu", (unsigned long long) | |
2639 | le64_to_cpu(es->s_last_error_block)); | |
2640 | printk("\n"); | |
2641 | } | |
2642 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2643 | } | |
2644 | ||
bfff6873 LC |
2645 | static void ext4_lazyinode_timeout(unsigned long data) |
2646 | { | |
2647 | struct task_struct *p = (struct task_struct *)data; | |
2648 | wake_up_process(p); | |
2649 | } | |
2650 | ||
2651 | /* Find next suitable group and run ext4_init_inode_table */ | |
2652 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2653 | { | |
2654 | struct ext4_group_desc *gdp = NULL; | |
2655 | ext4_group_t group, ngroups; | |
2656 | struct super_block *sb; | |
2657 | unsigned long timeout = 0; | |
2658 | int ret = 0; | |
2659 | ||
2660 | sb = elr->lr_super; | |
2661 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2662 | ||
2663 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2664 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2665 | if (!gdp) { | |
2666 | ret = 1; | |
2667 | break; | |
2668 | } | |
2669 | ||
2670 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2671 | break; | |
2672 | } | |
2673 | ||
2674 | if (group == ngroups) | |
2675 | ret = 1; | |
2676 | ||
2677 | if (!ret) { | |
2678 | timeout = jiffies; | |
2679 | ret = ext4_init_inode_table(sb, group, | |
2680 | elr->lr_timeout ? 0 : 1); | |
2681 | if (elr->lr_timeout == 0) { | |
2682 | timeout = jiffies - timeout; | |
2683 | if (elr->lr_sbi->s_li_wait_mult) | |
2684 | timeout *= elr->lr_sbi->s_li_wait_mult; | |
2685 | else | |
2686 | timeout *= 20; | |
2687 | elr->lr_timeout = timeout; | |
2688 | } | |
2689 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2690 | elr->lr_next_group = group + 1; | |
2691 | } | |
2692 | ||
2693 | return ret; | |
2694 | } | |
2695 | ||
2696 | /* | |
2697 | * Remove lr_request from the list_request and free the | |
2698 | * request tructure. Should be called with li_list_mtx held | |
2699 | */ | |
2700 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2701 | { | |
2702 | struct ext4_sb_info *sbi; | |
2703 | ||
2704 | if (!elr) | |
2705 | return; | |
2706 | ||
2707 | sbi = elr->lr_sbi; | |
2708 | ||
2709 | list_del(&elr->lr_request); | |
2710 | sbi->s_li_request = NULL; | |
2711 | kfree(elr); | |
2712 | } | |
2713 | ||
2714 | static void ext4_unregister_li_request(struct super_block *sb) | |
2715 | { | |
2716 | struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; | |
2717 | ||
2718 | if (!ext4_li_info) | |
2719 | return; | |
2720 | ||
2721 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2722 | ext4_remove_li_request(elr); | |
2723 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2724 | } | |
2725 | ||
8f1f7453 ES |
2726 | static struct task_struct *ext4_lazyinit_task; |
2727 | ||
bfff6873 LC |
2728 | /* |
2729 | * This is the function where ext4lazyinit thread lives. It walks | |
2730 | * through the request list searching for next scheduled filesystem. | |
2731 | * When such a fs is found, run the lazy initialization request | |
2732 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2733 | * function. Based on that time we compute next schedule time of | |
2734 | * the request. When walking through the list is complete, compute | |
2735 | * next waking time and put itself into sleep. | |
2736 | */ | |
2737 | static int ext4_lazyinit_thread(void *arg) | |
2738 | { | |
2739 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2740 | struct list_head *pos, *n; | |
2741 | struct ext4_li_request *elr; | |
2742 | unsigned long next_wakeup; | |
2743 | DEFINE_WAIT(wait); | |
bfff6873 LC |
2744 | |
2745 | BUG_ON(NULL == eli); | |
2746 | ||
2747 | eli->li_timer.data = (unsigned long)current; | |
2748 | eli->li_timer.function = ext4_lazyinode_timeout; | |
2749 | ||
2750 | eli->li_task = current; | |
2751 | wake_up(&eli->li_wait_task); | |
2752 | ||
2753 | cont_thread: | |
2754 | while (true) { | |
2755 | next_wakeup = MAX_JIFFY_OFFSET; | |
2756 | ||
2757 | mutex_lock(&eli->li_list_mtx); | |
2758 | if (list_empty(&eli->li_request_list)) { | |
2759 | mutex_unlock(&eli->li_list_mtx); | |
2760 | goto exit_thread; | |
2761 | } | |
2762 | ||
2763 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2764 | elr = list_entry(pos, struct ext4_li_request, | |
2765 | lr_request); | |
2766 | ||
b2c78cd0 TT |
2767 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2768 | if (ext4_run_li_request(elr) != 0) { | |
2769 | /* error, remove the lazy_init job */ | |
2770 | ext4_remove_li_request(elr); | |
2771 | continue; | |
2772 | } | |
bfff6873 LC |
2773 | } |
2774 | ||
2775 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2776 | next_wakeup = elr->lr_next_sched; | |
2777 | } | |
2778 | mutex_unlock(&eli->li_list_mtx); | |
2779 | ||
2780 | if (freezing(current)) | |
2781 | refrigerator(); | |
2782 | ||
f4245bd4 LC |
2783 | if ((time_after_eq(jiffies, next_wakeup)) || |
2784 | (MAX_JIFFY_OFFSET == next_wakeup)) { | |
bfff6873 LC |
2785 | cond_resched(); |
2786 | continue; | |
2787 | } | |
2788 | ||
2789 | eli->li_timer.expires = next_wakeup; | |
2790 | add_timer(&eli->li_timer); | |
2791 | prepare_to_wait(&eli->li_wait_daemon, &wait, | |
2792 | TASK_INTERRUPTIBLE); | |
2793 | if (time_before(jiffies, next_wakeup)) | |
2794 | schedule(); | |
2795 | finish_wait(&eli->li_wait_daemon, &wait); | |
8f1f7453 ES |
2796 | if (kthread_should_stop()) { |
2797 | ext4_clear_request_list(); | |
2798 | goto exit_thread; | |
2799 | } | |
bfff6873 LC |
2800 | } |
2801 | ||
2802 | exit_thread: | |
2803 | /* | |
2804 | * It looks like the request list is empty, but we need | |
2805 | * to check it under the li_list_mtx lock, to prevent any | |
2806 | * additions into it, and of course we should lock ext4_li_mtx | |
2807 | * to atomically free the list and ext4_li_info, because at | |
2808 | * this point another ext4 filesystem could be registering | |
2809 | * new one. | |
2810 | */ | |
2811 | mutex_lock(&ext4_li_mtx); | |
2812 | mutex_lock(&eli->li_list_mtx); | |
2813 | if (!list_empty(&eli->li_request_list)) { | |
2814 | mutex_unlock(&eli->li_list_mtx); | |
2815 | mutex_unlock(&ext4_li_mtx); | |
2816 | goto cont_thread; | |
2817 | } | |
2818 | mutex_unlock(&eli->li_list_mtx); | |
2819 | del_timer_sync(&ext4_li_info->li_timer); | |
2820 | eli->li_task = NULL; | |
2821 | wake_up(&eli->li_wait_task); | |
2822 | ||
2823 | kfree(ext4_li_info); | |
8f1f7453 | 2824 | ext4_lazyinit_task = NULL; |
bfff6873 LC |
2825 | ext4_li_info = NULL; |
2826 | mutex_unlock(&ext4_li_mtx); | |
2827 | ||
2828 | return 0; | |
2829 | } | |
2830 | ||
2831 | static void ext4_clear_request_list(void) | |
2832 | { | |
2833 | struct list_head *pos, *n; | |
2834 | struct ext4_li_request *elr; | |
2835 | ||
2836 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
2837 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
2838 | elr = list_entry(pos, struct ext4_li_request, | |
2839 | lr_request); | |
2840 | ext4_remove_li_request(elr); | |
2841 | } | |
2842 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2843 | } | |
2844 | ||
2845 | static int ext4_run_lazyinit_thread(void) | |
2846 | { | |
8f1f7453 ES |
2847 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
2848 | ext4_li_info, "ext4lazyinit"); | |
2849 | if (IS_ERR(ext4_lazyinit_task)) { | |
2850 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 LC |
2851 | ext4_clear_request_list(); |
2852 | del_timer_sync(&ext4_li_info->li_timer); | |
2853 | kfree(ext4_li_info); | |
2854 | ext4_li_info = NULL; | |
2855 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2856 | "initialization thread\n", | |
2857 | err); | |
2858 | return err; | |
2859 | } | |
2860 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
2861 | ||
2862 | wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); | |
2863 | return 0; | |
2864 | } | |
2865 | ||
2866 | /* | |
2867 | * Check whether it make sense to run itable init. thread or not. | |
2868 | * If there is at least one uninitialized inode table, return | |
2869 | * corresponding group number, else the loop goes through all | |
2870 | * groups and return total number of groups. | |
2871 | */ | |
2872 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2873 | { | |
2874 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2875 | struct ext4_group_desc *gdp = NULL; | |
2876 | ||
2877 | for (group = 0; group < ngroups; group++) { | |
2878 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2879 | if (!gdp) | |
2880 | continue; | |
2881 | ||
2882 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2883 | break; | |
2884 | } | |
2885 | ||
2886 | return group; | |
2887 | } | |
2888 | ||
2889 | static int ext4_li_info_new(void) | |
2890 | { | |
2891 | struct ext4_lazy_init *eli = NULL; | |
2892 | ||
2893 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2894 | if (!eli) | |
2895 | return -ENOMEM; | |
2896 | ||
2897 | eli->li_task = NULL; | |
2898 | INIT_LIST_HEAD(&eli->li_request_list); | |
2899 | mutex_init(&eli->li_list_mtx); | |
2900 | ||
2901 | init_waitqueue_head(&eli->li_wait_daemon); | |
2902 | init_waitqueue_head(&eli->li_wait_task); | |
2903 | init_timer(&eli->li_timer); | |
2904 | eli->li_state |= EXT4_LAZYINIT_QUIT; | |
2905 | ||
2906 | ext4_li_info = eli; | |
2907 | ||
2908 | return 0; | |
2909 | } | |
2910 | ||
2911 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2912 | ext4_group_t start) | |
2913 | { | |
2914 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2915 | struct ext4_li_request *elr; | |
2916 | unsigned long rnd; | |
2917 | ||
2918 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2919 | if (!elr) | |
2920 | return NULL; | |
2921 | ||
2922 | elr->lr_super = sb; | |
2923 | elr->lr_sbi = sbi; | |
2924 | elr->lr_next_group = start; | |
2925 | ||
2926 | /* | |
2927 | * Randomize first schedule time of the request to | |
2928 | * spread the inode table initialization requests | |
2929 | * better. | |
2930 | */ | |
2931 | get_random_bytes(&rnd, sizeof(rnd)); | |
2932 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2933 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2934 | ||
2935 | return elr; | |
2936 | } | |
2937 | ||
2938 | static int ext4_register_li_request(struct super_block *sb, | |
2939 | ext4_group_t first_not_zeroed) | |
2940 | { | |
2941 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2942 | struct ext4_li_request *elr; | |
2943 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
6c5a6cb9 | 2944 | int ret = 0; |
bfff6873 LC |
2945 | |
2946 | if (sbi->s_li_request != NULL) | |
beed5ecb | 2947 | return 0; |
bfff6873 LC |
2948 | |
2949 | if (first_not_zeroed == ngroups || | |
2950 | (sb->s_flags & MS_RDONLY) || | |
2951 | !test_opt(sb, INIT_INODE_TABLE)) { | |
2952 | sbi->s_li_request = NULL; | |
beed5ecb | 2953 | return 0; |
bfff6873 LC |
2954 | } |
2955 | ||
2956 | if (first_not_zeroed == ngroups) { | |
2957 | sbi->s_li_request = NULL; | |
beed5ecb | 2958 | return 0; |
bfff6873 LC |
2959 | } |
2960 | ||
2961 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
2962 | if (!elr) |
2963 | return -ENOMEM; | |
bfff6873 LC |
2964 | |
2965 | mutex_lock(&ext4_li_mtx); | |
2966 | ||
2967 | if (NULL == ext4_li_info) { | |
2968 | ret = ext4_li_info_new(); | |
2969 | if (ret) | |
2970 | goto out; | |
2971 | } | |
2972 | ||
2973 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2974 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2975 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2976 | ||
2977 | sbi->s_li_request = elr; | |
46e4690b TM |
2978 | /* |
2979 | * set elr to NULL here since it has been inserted to | |
2980 | * the request_list and the removal and free of it is | |
2981 | * handled by ext4_clear_request_list from now on. | |
2982 | */ | |
2983 | elr = NULL; | |
bfff6873 LC |
2984 | |
2985 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2986 | ret = ext4_run_lazyinit_thread(); | |
2987 | if (ret) | |
2988 | goto out; | |
2989 | } | |
bfff6873 | 2990 | out: |
beed5ecb NK |
2991 | mutex_unlock(&ext4_li_mtx); |
2992 | if (ret) | |
bfff6873 | 2993 | kfree(elr); |
bfff6873 LC |
2994 | return ret; |
2995 | } | |
2996 | ||
2997 | /* | |
2998 | * We do not need to lock anything since this is called on | |
2999 | * module unload. | |
3000 | */ | |
3001 | static void ext4_destroy_lazyinit_thread(void) | |
3002 | { | |
3003 | /* | |
3004 | * If thread exited earlier | |
3005 | * there's nothing to be done. | |
3006 | */ | |
8f1f7453 | 3007 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
3008 | return; |
3009 | ||
8f1f7453 | 3010 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
3011 | } |
3012 | ||
2b2d6d01 | 3013 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
3014 | __releases(kernel_lock) |
3015 | __acquires(kernel_lock) | |
ac27a0ec | 3016 | { |
d4c402d9 | 3017 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 3018 | struct buffer_head *bh; |
617ba13b MC |
3019 | struct ext4_super_block *es = NULL; |
3020 | struct ext4_sb_info *sbi; | |
3021 | ext4_fsblk_t block; | |
3022 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 3023 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 3024 | unsigned long offset = 0; |
ac27a0ec DK |
3025 | unsigned long journal_devnum = 0; |
3026 | unsigned long def_mount_opts; | |
3027 | struct inode *root; | |
9f6200bb | 3028 | char *cp; |
0390131b | 3029 | const char *descr; |
dcc7dae3 | 3030 | int ret = -ENOMEM; |
ac27a0ec | 3031 | int blocksize; |
4ec11028 TT |
3032 | unsigned int db_count; |
3033 | unsigned int i; | |
f287a1a5 | 3034 | int needs_recovery, has_huge_files; |
bd81d8ee | 3035 | __u64 blocks_count; |
833f4077 | 3036 | int err; |
b3881f74 | 3037 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3038 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3039 | |
3040 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3041 | if (!sbi) | |
dcc7dae3 | 3042 | goto out_free_orig; |
705895b6 PE |
3043 | |
3044 | sbi->s_blockgroup_lock = | |
3045 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3046 | if (!sbi->s_blockgroup_lock) { | |
3047 | kfree(sbi); | |
dcc7dae3 | 3048 | goto out_free_orig; |
705895b6 | 3049 | } |
ac27a0ec DK |
3050 | sb->s_fs_info = sbi; |
3051 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3052 | sbi->s_resuid = EXT4_DEF_RESUID; |
3053 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3054 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3055 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3056 | if (sb->s_bdev->bd_part) |
3057 | sbi->s_sectors_written_start = | |
3058 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3059 | |
9f6200bb TT |
3060 | /* Cleanup superblock name */ |
3061 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3062 | *cp = '!'; | |
3063 | ||
dcc7dae3 | 3064 | ret = -EINVAL; |
617ba13b | 3065 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3066 | if (!blocksize) { |
b31e1552 | 3067 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3068 | goto out_fail; |
3069 | } | |
3070 | ||
3071 | /* | |
617ba13b | 3072 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3073 | * block sizes. We need to calculate the offset from buffer start. |
3074 | */ | |
617ba13b | 3075 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3076 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3077 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3078 | } else { |
70bbb3e0 | 3079 | logical_sb_block = sb_block; |
ac27a0ec DK |
3080 | } |
3081 | ||
70bbb3e0 | 3082 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3083 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3084 | goto out_fail; |
3085 | } | |
3086 | /* | |
3087 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3088 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3089 | */ |
617ba13b | 3090 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3091 | sbi->s_es = es; |
3092 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3093 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3094 | goto cantfind_ext4; | |
afc32f7e | 3095 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3096 | |
3097 | /* Set defaults before we parse the mount options */ | |
3098 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
fd8c37ec | 3099 | set_opt(sb, INIT_INODE_TABLE); |
617ba13b | 3100 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
fd8c37ec | 3101 | set_opt(sb, DEBUG); |
437ca0fd DM |
3102 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3103 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3104 | "2.6.38"); | |
fd8c37ec | 3105 | set_opt(sb, GRPID); |
437ca0fd | 3106 | } |
617ba13b | 3107 | if (def_mount_opts & EXT4_DEFM_UID16) |
fd8c37ec | 3108 | set_opt(sb, NO_UID32); |
ea663336 | 3109 | /* xattr user namespace & acls are now defaulted on */ |
03010a33 | 3110 | #ifdef CONFIG_EXT4_FS_XATTR |
ea663336 | 3111 | set_opt(sb, XATTR_USER); |
2e7842b8 | 3112 | #endif |
03010a33 | 3113 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ea663336 | 3114 | set_opt(sb, POSIX_ACL); |
2e7842b8 | 3115 | #endif |
6fd7a467 | 3116 | set_opt(sb, MBLK_IO_SUBMIT); |
617ba13b | 3117 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
fd8c37ec | 3118 | set_opt(sb, JOURNAL_DATA); |
617ba13b | 3119 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
fd8c37ec | 3120 | set_opt(sb, ORDERED_DATA); |
617ba13b | 3121 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
fd8c37ec | 3122 | set_opt(sb, WRITEBACK_DATA); |
617ba13b MC |
3123 | |
3124 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
fd8c37ec | 3125 | set_opt(sb, ERRORS_PANIC); |
bb4f397a | 3126 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
fd8c37ec | 3127 | set_opt(sb, ERRORS_CONT); |
bb4f397a | 3128 | else |
fd8c37ec | 3129 | set_opt(sb, ERRORS_RO); |
8b67f04a | 3130 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
fd8c37ec | 3131 | set_opt(sb, BLOCK_VALIDITY); |
8b67f04a | 3132 | if (def_mount_opts & EXT4_DEFM_DISCARD) |
fd8c37ec | 3133 | set_opt(sb, DISCARD); |
ac27a0ec DK |
3134 | |
3135 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3136 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3137 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3138 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3139 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3140 | |
8b67f04a | 3141 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
fd8c37ec | 3142 | set_opt(sb, BARRIER); |
ac27a0ec | 3143 | |
dd919b98 AK |
3144 | /* |
3145 | * enable delayed allocation by default | |
3146 | * Use -o nodelalloc to turn it off | |
3147 | */ | |
8b67f04a TT |
3148 | if (!IS_EXT3_SB(sb) && |
3149 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
fd8c37ec | 3150 | set_opt(sb, DELALLOC); |
dd919b98 | 3151 | |
8b67f04a TT |
3152 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3153 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3154 | ext4_msg(sb, KERN_WARNING, | |
3155 | "failed to parse options in superblock: %s", | |
3156 | sbi->s_es->s_mount_opts); | |
3157 | } | |
b3881f74 TT |
3158 | if (!parse_options((char *) data, sb, &journal_devnum, |
3159 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3160 | goto failed_mount; |
3161 | ||
3162 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3163 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3164 | |
617ba13b MC |
3165 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3166 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3167 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3168 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3169 | ext4_msg(sb, KERN_WARNING, |
3170 | "feature flags set on rev 0 fs, " | |
3171 | "running e2fsck is recommended"); | |
469108ff | 3172 | |
ac27a0ec DK |
3173 | /* |
3174 | * Check feature flags regardless of the revision level, since we | |
3175 | * previously didn't change the revision level when setting the flags, | |
3176 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3177 | */ | |
a13fb1a4 | 3178 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3179 | goto failed_mount; |
a13fb1a4 | 3180 | |
ac27a0ec DK |
3181 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
3182 | ||
617ba13b MC |
3183 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3184 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3185 | ext4_msg(sb, KERN_ERR, |
3186 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3187 | goto failed_mount; |
3188 | } | |
3189 | ||
ac27a0ec | 3190 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3191 | /* Validate the filesystem blocksize */ |
3192 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3193 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3194 | blocksize); |
ac27a0ec DK |
3195 | goto failed_mount; |
3196 | } | |
3197 | ||
2b2d6d01 | 3198 | brelse(bh); |
70bbb3e0 AM |
3199 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3200 | offset = do_div(logical_sb_block, blocksize); | |
3201 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3202 | if (!bh) { |
b31e1552 ES |
3203 | ext4_msg(sb, KERN_ERR, |
3204 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3205 | goto failed_mount; |
3206 | } | |
617ba13b | 3207 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3208 | sbi->s_es = es; |
617ba13b | 3209 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3210 | ext4_msg(sb, KERN_ERR, |
3211 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3212 | goto failed_mount; |
3213 | } | |
3214 | } | |
3215 | ||
a13fb1a4 ES |
3216 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3217 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3218 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3219 | has_huge_files); | |
3220 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3221 | |
617ba13b MC |
3222 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3223 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3224 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3225 | } else { |
3226 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3227 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3228 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3229 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3230 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3231 | ext4_msg(sb, KERN_ERR, |
3232 | "unsupported inode size: %d", | |
2b2d6d01 | 3233 | sbi->s_inode_size); |
ac27a0ec DK |
3234 | goto failed_mount; |
3235 | } | |
ef7f3835 KS |
3236 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3237 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3238 | } |
0b8e58a1 | 3239 | |
0d1ee42f AR |
3240 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3241 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3242 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3243 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3244 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3245 | ext4_msg(sb, KERN_ERR, |
3246 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3247 | sbi->s_desc_size); |
3248 | goto failed_mount; | |
3249 | } | |
3250 | } else | |
3251 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3252 | |
ac27a0ec | 3253 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3254 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3255 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3256 | goto cantfind_ext4; |
0b8e58a1 | 3257 | |
617ba13b | 3258 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3259 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3260 | goto cantfind_ext4; |
ac27a0ec DK |
3261 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3262 | sbi->s_inodes_per_block; | |
0d1ee42f | 3263 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3264 | sbi->s_sbh = bh; |
3265 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3266 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3267 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3268 | |
2b2d6d01 | 3269 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3270 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3271 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3272 | i = le32_to_cpu(es->s_flags); |
3273 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3274 | sbi->s_hash_unsigned = 3; | |
3275 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3276 | #ifdef __CHAR_UNSIGNED__ | |
3277 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3278 | sbi->s_hash_unsigned = 3; | |
3279 | #else | |
3280 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3281 | #endif | |
3282 | sb->s_dirt = 1; | |
3283 | } | |
ac27a0ec DK |
3284 | |
3285 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
3286 | ext4_msg(sb, KERN_ERR, |
3287 | "#blocks per group too big: %lu", | |
2b2d6d01 | 3288 | sbi->s_blocks_per_group); |
ac27a0ec DK |
3289 | goto failed_mount; |
3290 | } | |
ac27a0ec | 3291 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3292 | ext4_msg(sb, KERN_ERR, |
3293 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3294 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3295 | goto failed_mount; |
3296 | } | |
3297 | ||
bf43d84b ES |
3298 | /* |
3299 | * Test whether we have more sectors than will fit in sector_t, | |
3300 | * and whether the max offset is addressable by the page cache. | |
3301 | */ | |
5a9ae68a | 3302 | err = generic_check_addressable(sb->s_blocksize_bits, |
30ca22c7 | 3303 | ext4_blocks_count(es)); |
5a9ae68a | 3304 | if (err) { |
b31e1552 | 3305 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3306 | " too large to mount safely on this system"); |
ac27a0ec | 3307 | if (sizeof(sector_t) < 8) |
90c699a9 | 3308 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
5a9ae68a | 3309 | ret = err; |
ac27a0ec DK |
3310 | goto failed_mount; |
3311 | } | |
3312 | ||
617ba13b MC |
3313 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3314 | goto cantfind_ext4; | |
e7c95593 | 3315 | |
0f2ddca6 FTN |
3316 | /* check blocks count against device size */ |
3317 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3318 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3319 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3320 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3321 | ext4_blocks_count(es), blocks_count); |
3322 | goto failed_mount; | |
3323 | } | |
3324 | ||
0b8e58a1 AD |
3325 | /* |
3326 | * It makes no sense for the first data block to be beyond the end | |
3327 | * of the filesystem. | |
3328 | */ | |
3329 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3330 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3331 | "block %u is beyond end of filesystem (%llu)", | |
3332 | le32_to_cpu(es->s_first_data_block), | |
3333 | ext4_blocks_count(es)); | |
e7c95593 ES |
3334 | goto failed_mount; |
3335 | } | |
bd81d8ee LV |
3336 | blocks_count = (ext4_blocks_count(es) - |
3337 | le32_to_cpu(es->s_first_data_block) + | |
3338 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3339 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3340 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3341 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3342 | "(block count %llu, first data block %u, " |
b31e1552 | 3343 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3344 | ext4_blocks_count(es), |
3345 | le32_to_cpu(es->s_first_data_block), | |
3346 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3347 | goto failed_mount; | |
3348 | } | |
bd81d8ee | 3349 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3350 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3351 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3352 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3353 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 3354 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
3355 | GFP_KERNEL); |
3356 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 3357 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3358 | goto failed_mount; |
3359 | } | |
3360 | ||
3244fcb1 | 3361 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
3362 | if (ext4_proc_root) |
3363 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 3364 | #endif |
240799cd | 3365 | |
705895b6 | 3366 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3367 | |
3368 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3369 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3370 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3371 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3372 | ext4_msg(sb, KERN_ERR, |
3373 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3374 | db_count = i; |
3375 | goto failed_mount2; | |
3376 | } | |
3377 | } | |
bfff6873 | 3378 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3379 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3380 | goto failed_mount2; |
3381 | } | |
772cb7c8 JS |
3382 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3383 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3384 | ext4_msg(sb, KERN_ERR, |
3385 | "unable to initialize " | |
3386 | "flex_bg meta info!"); | |
772cb7c8 JS |
3387 | goto failed_mount2; |
3388 | } | |
3389 | ||
ac27a0ec DK |
3390 | sbi->s_gdb_count = db_count; |
3391 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3392 | spin_lock_init(&sbi->s_next_gen_lock); | |
3393 | ||
ce7e010a TT |
3394 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
3395 | ext4_count_free_blocks(sb)); | |
3396 | if (!err) { | |
3397 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3398 | ext4_count_free_inodes(sb)); | |
3399 | } | |
3400 | if (!err) { | |
3401 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3402 | ext4_count_dirs(sb)); | |
3403 | } | |
3404 | if (!err) { | |
3405 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
3406 | } | |
3407 | if (err) { | |
3408 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3409 | goto failed_mount3; | |
3410 | } | |
3411 | ||
c9de560d | 3412 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3413 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3414 | |
ac27a0ec DK |
3415 | /* |
3416 | * set up enough so that it can read an inode | |
3417 | */ | |
9ca92389 TT |
3418 | if (!test_opt(sb, NOLOAD) && |
3419 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3420 | sb->s_op = &ext4_sops; | |
3421 | else | |
3422 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3423 | sb->s_export_op = &ext4_export_ops; |
3424 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3425 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3426 | sb->s_qcop = &ext4_qctl_operations; |
3427 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec | 3428 | #endif |
f2fa2ffc AK |
3429 | memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
3430 | ||
ac27a0ec | 3431 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 3432 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 3433 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
3434 | |
3435 | sb->s_root = NULL; | |
3436 | ||
3437 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3438 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3439 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
3440 | |
3441 | /* | |
3442 | * The first inode we look at is the journal inode. Don't try | |
3443 | * root first: it may be modified in the journal! | |
3444 | */ | |
3445 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3446 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3447 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3448 | goto failed_mount3; |
0390131b FM |
3449 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3450 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3451 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3452 | "suppressed and not mounted read-only"); | |
744692dc | 3453 | goto failed_mount_wq; |
ac27a0ec | 3454 | } else { |
fd8c37ec TT |
3455 | clear_opt(sb, DATA_FLAGS); |
3456 | set_opt(sb, WRITEBACK_DATA); | |
0390131b FM |
3457 | sbi->s_journal = NULL; |
3458 | needs_recovery = 0; | |
3459 | goto no_journal; | |
ac27a0ec DK |
3460 | } |
3461 | ||
eb40a09c JS |
3462 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3463 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3464 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3465 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3466 | goto failed_mount_wq; |
eb40a09c JS |
3467 | } |
3468 | ||
d4da6c9c LT |
3469 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3470 | jbd2_journal_set_features(sbi->s_journal, | |
3471 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3472 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3473 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3474 | jbd2_journal_set_features(sbi->s_journal, | |
3475 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3476 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3477 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3478 | } else { |
3479 | jbd2_journal_clear_features(sbi->s_journal, | |
3480 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3481 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3482 | } | |
818d276c | 3483 | |
ac27a0ec DK |
3484 | /* We have now updated the journal if required, so we can |
3485 | * validate the data journaling mode. */ | |
3486 | switch (test_opt(sb, DATA_FLAGS)) { | |
3487 | case 0: | |
3488 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3489 | * capabilities: ORDERED_DATA if the journal can |
3490 | * cope, else JOURNAL_DATA | |
3491 | */ | |
dab291af MC |
3492 | if (jbd2_journal_check_available_features |
3493 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
fd8c37ec | 3494 | set_opt(sb, ORDERED_DATA); |
ac27a0ec | 3495 | else |
fd8c37ec | 3496 | set_opt(sb, JOURNAL_DATA); |
ac27a0ec DK |
3497 | break; |
3498 | ||
617ba13b MC |
3499 | case EXT4_MOUNT_ORDERED_DATA: |
3500 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3501 | if (!jbd2_journal_check_available_features |
3502 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3503 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3504 | "requested data journaling mode"); | |
744692dc | 3505 | goto failed_mount_wq; |
ac27a0ec DK |
3506 | } |
3507 | default: | |
3508 | break; | |
3509 | } | |
b3881f74 | 3510 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3511 | |
ce7e010a TT |
3512 | /* |
3513 | * The journal may have updated the bg summary counts, so we | |
3514 | * need to update the global counters. | |
3515 | */ | |
3516 | percpu_counter_set(&sbi->s_freeblocks_counter, | |
3517 | ext4_count_free_blocks(sb)); | |
3518 | percpu_counter_set(&sbi->s_freeinodes_counter, | |
3519 | ext4_count_free_inodes(sb)); | |
3520 | percpu_counter_set(&sbi->s_dirs_counter, | |
3521 | ext4_count_dirs(sb)); | |
3522 | percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); | |
206f7ab4 | 3523 | |
ce7e010a | 3524 | no_journal: |
fd89d5f2 TH |
3525 | /* |
3526 | * The maximum number of concurrent works can be high and | |
3527 | * concurrency isn't really necessary. Limit it to 1. | |
3528 | */ | |
3529 | EXT4_SB(sb)->dio_unwritten_wq = | |
ae005cbe | 3530 | alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
4c0425ff MC |
3531 | if (!EXT4_SB(sb)->dio_unwritten_wq) { |
3532 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3533 | goto failed_mount_wq; | |
3534 | } | |
3535 | ||
ac27a0ec | 3536 | /* |
dab291af | 3537 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3538 | * so we can safely mount the rest of the filesystem now. |
3539 | */ | |
3540 | ||
1d1fe1ee DH |
3541 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3542 | if (IS_ERR(root)) { | |
b31e1552 | 3543 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3544 | ret = PTR_ERR(root); |
32a9bb57 | 3545 | root = NULL; |
ac27a0ec DK |
3546 | goto failed_mount4; |
3547 | } | |
3548 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 3549 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3550 | goto failed_mount4; |
3551 | } | |
1d1fe1ee DH |
3552 | sb->s_root = d_alloc_root(root); |
3553 | if (!sb->s_root) { | |
b31e1552 | 3554 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3555 | ret = -ENOMEM; |
3556 | goto failed_mount4; | |
3557 | } | |
ac27a0ec | 3558 | |
2b2d6d01 | 3559 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3560 | |
3561 | /* determine the minimum size of new large inodes, if present */ | |
3562 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3563 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3564 | EXT4_GOOD_OLD_INODE_SIZE; | |
3565 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3566 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3567 | if (sbi->s_want_extra_isize < | |
3568 | le16_to_cpu(es->s_want_extra_isize)) | |
3569 | sbi->s_want_extra_isize = | |
3570 | le16_to_cpu(es->s_want_extra_isize); | |
3571 | if (sbi->s_want_extra_isize < | |
3572 | le16_to_cpu(es->s_min_extra_isize)) | |
3573 | sbi->s_want_extra_isize = | |
3574 | le16_to_cpu(es->s_min_extra_isize); | |
3575 | } | |
3576 | } | |
3577 | /* Check if enough inode space is available */ | |
3578 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3579 | sbi->s_inode_size) { | |
3580 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3581 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3582 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3583 | "available"); | |
ef7f3835 KS |
3584 | } |
3585 | ||
90576c0b TT |
3586 | if (test_opt(sb, DELALLOC) && |
3587 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
3588 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
3589 | "requested data journaling mode"); | |
fd8c37ec | 3590 | clear_opt(sb, DELALLOC); |
90576c0b | 3591 | } |
744692dc JZ |
3592 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
3593 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
3594 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3595 | "option - requested data journaling mode"); | |
fd8c37ec | 3596 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3597 | } |
3598 | if (sb->s_blocksize < PAGE_SIZE) { | |
3599 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3600 | "option - block size is too small"); | |
fd8c37ec | 3601 | clear_opt(sb, DIOREAD_NOLOCK); |
744692dc JZ |
3602 | } |
3603 | } | |
c2774d84 | 3604 | |
6fd058f7 TT |
3605 | err = ext4_setup_system_zone(sb); |
3606 | if (err) { | |
b31e1552 | 3607 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3608 | "zone (%d)", err); |
6fd058f7 TT |
3609 | goto failed_mount4; |
3610 | } | |
3611 | ||
c2774d84 AK |
3612 | ext4_ext_init(sb); |
3613 | err = ext4_mb_init(sb, needs_recovery); | |
3614 | if (err) { | |
421f91d2 | 3615 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3616 | err); |
c2774d84 AK |
3617 | goto failed_mount4; |
3618 | } | |
3619 | ||
bfff6873 LC |
3620 | err = ext4_register_li_request(sb, first_not_zeroed); |
3621 | if (err) | |
3622 | goto failed_mount4; | |
3623 | ||
3197ebdb TT |
3624 | sbi->s_kobj.kset = ext4_kset; |
3625 | init_completion(&sbi->s_kobj_unregister); | |
3626 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3627 | "%s", sb->s_id); | |
3628 | if (err) { | |
3629 | ext4_mb_release(sb); | |
3630 | ext4_ext_release(sb); | |
3631 | goto failed_mount4; | |
3632 | }; | |
3633 | ||
617ba13b MC |
3634 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3635 | ext4_orphan_cleanup(sb, es); | |
3636 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3637 | if (needs_recovery) { |
b31e1552 | 3638 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3639 | ext4_mark_recovery_complete(sb, es); |
3640 | } | |
3641 | if (EXT4_SB(sb)->s_journal) { | |
3642 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3643 | descr = " journalled data mode"; | |
3644 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3645 | descr = " ordered data mode"; | |
3646 | else | |
3647 | descr = " writeback data mode"; | |
3648 | } else | |
3649 | descr = "out journal"; | |
3650 | ||
d4c402d9 | 3651 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3652 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3653 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3654 | |
66e61a9e TT |
3655 | init_timer(&sbi->s_err_report); |
3656 | sbi->s_err_report.function = print_daily_error_info; | |
3657 | sbi->s_err_report.data = (unsigned long) sb; | |
3658 | if (es->s_error_count) | |
3659 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3660 | |
d4c402d9 | 3661 | kfree(orig_data); |
ac27a0ec DK |
3662 | return 0; |
3663 | ||
617ba13b | 3664 | cantfind_ext4: |
ac27a0ec | 3665 | if (!silent) |
b31e1552 | 3666 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3667 | goto failed_mount; |
3668 | ||
3669 | failed_mount4: | |
32a9bb57 MK |
3670 | iput(root); |
3671 | sb->s_root = NULL; | |
b31e1552 | 3672 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3673 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3674 | failed_mount_wq: | |
6fd058f7 | 3675 | ext4_release_system_zone(sb); |
0390131b FM |
3676 | if (sbi->s_journal) { |
3677 | jbd2_journal_destroy(sbi->s_journal); | |
3678 | sbi->s_journal = NULL; | |
3679 | } | |
ac27a0ec | 3680 | failed_mount3: |
c5ca7c76 TT |
3681 | if (sbi->s_flex_groups) { |
3682 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3683 | vfree(sbi->s_flex_groups); | |
3684 | else | |
3685 | kfree(sbi->s_flex_groups); | |
3686 | } | |
ce7e010a TT |
3687 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3688 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3689 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3690 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
ac27a0ec DK |
3691 | failed_mount2: |
3692 | for (i = 0; i < db_count; i++) | |
3693 | brelse(sbi->s_group_desc[i]); | |
3694 | kfree(sbi->s_group_desc); | |
3695 | failed_mount: | |
240799cd | 3696 | if (sbi->s_proc) { |
9f6200bb | 3697 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3698 | } |
ac27a0ec DK |
3699 | #ifdef CONFIG_QUOTA |
3700 | for (i = 0; i < MAXQUOTAS; i++) | |
3701 | kfree(sbi->s_qf_names[i]); | |
3702 | #endif | |
617ba13b | 3703 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3704 | brelse(bh); |
3705 | out_fail: | |
3706 | sb->s_fs_info = NULL; | |
f6830165 | 3707 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3708 | kfree(sbi); |
dcc7dae3 | 3709 | out_free_orig: |
d4c402d9 | 3710 | kfree(orig_data); |
1d1fe1ee | 3711 | return ret; |
ac27a0ec DK |
3712 | } |
3713 | ||
3714 | /* | |
3715 | * Setup any per-fs journal parameters now. We'll do this both on | |
3716 | * initial mount, once the journal has been initialised but before we've | |
3717 | * done any recovery; and again on any subsequent remount. | |
3718 | */ | |
617ba13b | 3719 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3720 | { |
617ba13b | 3721 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3722 | |
30773840 TT |
3723 | journal->j_commit_interval = sbi->s_commit_interval; |
3724 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3725 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3726 | |
a931da6a | 3727 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3728 | if (test_opt(sb, BARRIER)) |
dab291af | 3729 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3730 | else |
dab291af | 3731 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3732 | if (test_opt(sb, DATA_ERR_ABORT)) |
3733 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3734 | else | |
3735 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3736 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3737 | } |
3738 | ||
617ba13b | 3739 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3740 | unsigned int journal_inum) |
3741 | { | |
3742 | struct inode *journal_inode; | |
3743 | journal_t *journal; | |
3744 | ||
0390131b FM |
3745 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3746 | ||
ac27a0ec DK |
3747 | /* First, test for the existence of a valid inode on disk. Bad |
3748 | * things happen if we iget() an unused inode, as the subsequent | |
3749 | * iput() will try to delete it. */ | |
3750 | ||
1d1fe1ee DH |
3751 | journal_inode = ext4_iget(sb, journal_inum); |
3752 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3753 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3754 | return NULL; |
3755 | } | |
3756 | if (!journal_inode->i_nlink) { | |
3757 | make_bad_inode(journal_inode); | |
3758 | iput(journal_inode); | |
b31e1552 | 3759 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3760 | return NULL; |
3761 | } | |
3762 | ||
e5f8eab8 | 3763 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3764 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3765 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3766 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3767 | iput(journal_inode); |
3768 | return NULL; | |
3769 | } | |
3770 | ||
dab291af | 3771 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3772 | if (!journal) { |
b31e1552 | 3773 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3774 | iput(journal_inode); |
3775 | return NULL; | |
3776 | } | |
3777 | journal->j_private = sb; | |
617ba13b | 3778 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3779 | return journal; |
3780 | } | |
3781 | ||
617ba13b | 3782 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3783 | dev_t j_dev) |
3784 | { | |
2b2d6d01 | 3785 | struct buffer_head *bh; |
ac27a0ec | 3786 | journal_t *journal; |
617ba13b MC |
3787 | ext4_fsblk_t start; |
3788 | ext4_fsblk_t len; | |
ac27a0ec | 3789 | int hblock, blocksize; |
617ba13b | 3790 | ext4_fsblk_t sb_block; |
ac27a0ec | 3791 | unsigned long offset; |
2b2d6d01 | 3792 | struct ext4_super_block *es; |
ac27a0ec DK |
3793 | struct block_device *bdev; |
3794 | ||
0390131b FM |
3795 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3796 | ||
b31e1552 | 3797 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3798 | if (bdev == NULL) |
3799 | return NULL; | |
3800 | ||
ac27a0ec | 3801 | blocksize = sb->s_blocksize; |
e1defc4f | 3802 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3803 | if (blocksize < hblock) { |
b31e1552 ES |
3804 | ext4_msg(sb, KERN_ERR, |
3805 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3806 | goto out_bdev; |
3807 | } | |
3808 | ||
617ba13b MC |
3809 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3810 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3811 | set_blocksize(bdev, blocksize); |
3812 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3813 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3814 | "external journal"); | |
ac27a0ec DK |
3815 | goto out_bdev; |
3816 | } | |
3817 | ||
617ba13b MC |
3818 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3819 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3820 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3821 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3822 | ext4_msg(sb, KERN_ERR, "external journal has " |
3823 | "bad superblock"); | |
ac27a0ec DK |
3824 | brelse(bh); |
3825 | goto out_bdev; | |
3826 | } | |
3827 | ||
617ba13b | 3828 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3829 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3830 | brelse(bh); |
3831 | goto out_bdev; | |
3832 | } | |
3833 | ||
bd81d8ee | 3834 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3835 | start = sb_block + 1; |
3836 | brelse(bh); /* we're done with the superblock */ | |
3837 | ||
dab291af | 3838 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3839 | start, len, blocksize); |
3840 | if (!journal) { | |
b31e1552 | 3841 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3842 | goto out_bdev; |
3843 | } | |
3844 | journal->j_private = sb; | |
3845 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3846 | wait_on_buffer(journal->j_sb_buffer); | |
3847 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3848 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3849 | goto out_journal; |
3850 | } | |
3851 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3852 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3853 | "user (unsupported) - %d", | |
ac27a0ec DK |
3854 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3855 | goto out_journal; | |
3856 | } | |
617ba13b MC |
3857 | EXT4_SB(sb)->journal_bdev = bdev; |
3858 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3859 | return journal; |
0b8e58a1 | 3860 | |
ac27a0ec | 3861 | out_journal: |
dab291af | 3862 | jbd2_journal_destroy(journal); |
ac27a0ec | 3863 | out_bdev: |
617ba13b | 3864 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3865 | return NULL; |
3866 | } | |
3867 | ||
617ba13b MC |
3868 | static int ext4_load_journal(struct super_block *sb, |
3869 | struct ext4_super_block *es, | |
ac27a0ec DK |
3870 | unsigned long journal_devnum) |
3871 | { | |
3872 | journal_t *journal; | |
3873 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3874 | dev_t journal_dev; | |
3875 | int err = 0; | |
3876 | int really_read_only; | |
3877 | ||
0390131b FM |
3878 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3879 | ||
ac27a0ec DK |
3880 | if (journal_devnum && |
3881 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3882 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3883 | "numbers have changed"); | |
ac27a0ec DK |
3884 | journal_dev = new_decode_dev(journal_devnum); |
3885 | } else | |
3886 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3887 | ||
3888 | really_read_only = bdev_read_only(sb->s_bdev); | |
3889 | ||
3890 | /* | |
3891 | * Are we loading a blank journal or performing recovery after a | |
3892 | * crash? For recovery, we need to check in advance whether we | |
3893 | * can get read-write access to the device. | |
3894 | */ | |
617ba13b | 3895 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3896 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3897 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3898 | "required on readonly filesystem"); | |
ac27a0ec | 3899 | if (really_read_only) { |
b31e1552 ES |
3900 | ext4_msg(sb, KERN_ERR, "write access " |
3901 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3902 | return -EROFS; |
3903 | } | |
b31e1552 ES |
3904 | ext4_msg(sb, KERN_INFO, "write access will " |
3905 | "be enabled during recovery"); | |
ac27a0ec DK |
3906 | } |
3907 | } | |
3908 | ||
3909 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3910 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3911 | "and inode journals!"); | |
ac27a0ec DK |
3912 | return -EINVAL; |
3913 | } | |
3914 | ||
3915 | if (journal_inum) { | |
617ba13b | 3916 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3917 | return -EINVAL; |
3918 | } else { | |
617ba13b | 3919 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3920 | return -EINVAL; |
3921 | } | |
3922 | ||
90576c0b | 3923 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3924 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3925 | |
ac27a0ec | 3926 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3927 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3928 | if (err) { |
b31e1552 | 3929 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3930 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3931 | return err; |
3932 | } | |
3933 | } | |
3934 | ||
617ba13b | 3935 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3936 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
3937 | if (!err) { |
3938 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
3939 | if (save) | |
3940 | memcpy(save, ((char *) es) + | |
3941 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 3942 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
3943 | if (save) |
3944 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
3945 | save, EXT4_S_ERR_LEN); | |
3946 | kfree(save); | |
3947 | } | |
ac27a0ec DK |
3948 | |
3949 | if (err) { | |
b31e1552 | 3950 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3951 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3952 | return err; |
3953 | } | |
3954 | ||
617ba13b MC |
3955 | EXT4_SB(sb)->s_journal = journal; |
3956 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3957 | |
c41303ce | 3958 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
3959 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
3960 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3961 | |
3962 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3963 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3964 | } |
3965 | ||
3966 | return 0; | |
3967 | } | |
3968 | ||
e2d67052 | 3969 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3970 | { |
e2d67052 | 3971 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3972 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3973 | int error = 0; |
ac27a0ec DK |
3974 | |
3975 | if (!sbh) | |
c4be0c1d | 3976 | return error; |
914258bf TT |
3977 | if (buffer_write_io_error(sbh)) { |
3978 | /* | |
3979 | * Oh, dear. A previous attempt to write the | |
3980 | * superblock failed. This could happen because the | |
3981 | * USB device was yanked out. Or it could happen to | |
3982 | * be a transient write error and maybe the block will | |
3983 | * be remapped. Nothing we can do but to retry the | |
3984 | * write and hope for the best. | |
3985 | */ | |
b31e1552 ES |
3986 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3987 | "superblock detected"); | |
914258bf TT |
3988 | clear_buffer_write_io_error(sbh); |
3989 | set_buffer_uptodate(sbh); | |
3990 | } | |
71290b36 TT |
3991 | /* |
3992 | * If the file system is mounted read-only, don't update the | |
3993 | * superblock write time. This avoids updating the superblock | |
3994 | * write time when we are mounting the root file system | |
3995 | * read/only but we need to replay the journal; at that point, | |
3996 | * for people who are east of GMT and who make their clock | |
3997 | * tick in localtime for Windows bug-for-bug compatibility, | |
3998 | * the clock is set in the future, and this will cause e2fsck | |
3999 | * to complain and force a full file system check. | |
4000 | */ | |
4001 | if (!(sb->s_flags & MS_RDONLY)) | |
4002 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
4003 | if (sb->s_bdev->bd_part) |
4004 | es->s_kbytes_written = | |
4005 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
4006 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
4007 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
4008 | else |
4009 | es->s_kbytes_written = | |
4010 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
ce7e010a TT |
4011 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
4012 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
4013 | es->s_free_inodes_count = | |
4014 | cpu_to_le32(percpu_counter_sum_positive( | |
4015 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 4016 | sb->s_dirt = 0; |
ac27a0ec DK |
4017 | BUFFER_TRACE(sbh, "marking dirty"); |
4018 | mark_buffer_dirty(sbh); | |
914258bf | 4019 | if (sync) { |
c4be0c1d TS |
4020 | error = sync_dirty_buffer(sbh); |
4021 | if (error) | |
4022 | return error; | |
4023 | ||
4024 | error = buffer_write_io_error(sbh); | |
4025 | if (error) { | |
b31e1552 ES |
4026 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
4027 | "superblock"); | |
914258bf TT |
4028 | clear_buffer_write_io_error(sbh); |
4029 | set_buffer_uptodate(sbh); | |
4030 | } | |
4031 | } | |
c4be0c1d | 4032 | return error; |
ac27a0ec DK |
4033 | } |
4034 | ||
ac27a0ec DK |
4035 | /* |
4036 | * Have we just finished recovery? If so, and if we are mounting (or | |
4037 | * remounting) the filesystem readonly, then we will end up with a | |
4038 | * consistent fs on disk. Record that fact. | |
4039 | */ | |
2b2d6d01 TT |
4040 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4041 | struct ext4_super_block *es) | |
ac27a0ec | 4042 | { |
617ba13b | 4043 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4044 | |
0390131b FM |
4045 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4046 | BUG_ON(journal != NULL); | |
4047 | return; | |
4048 | } | |
dab291af | 4049 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4050 | if (jbd2_journal_flush(journal) < 0) |
4051 | goto out; | |
4052 | ||
617ba13b | 4053 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4054 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4055 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4056 | ext4_commit_super(sb, 1); |
ac27a0ec | 4057 | } |
7ffe1ea8 HK |
4058 | |
4059 | out: | |
dab291af | 4060 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4061 | } |
4062 | ||
4063 | /* | |
4064 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4065 | * has recorded an error from a previous lifetime, move that error to the | |
4066 | * main filesystem now. | |
4067 | */ | |
2b2d6d01 TT |
4068 | static void ext4_clear_journal_err(struct super_block *sb, |
4069 | struct ext4_super_block *es) | |
ac27a0ec DK |
4070 | { |
4071 | journal_t *journal; | |
4072 | int j_errno; | |
4073 | const char *errstr; | |
4074 | ||
0390131b FM |
4075 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4076 | ||
617ba13b | 4077 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4078 | |
4079 | /* | |
4080 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4081 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4082 | */ |
4083 | ||
dab291af | 4084 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4085 | if (j_errno) { |
4086 | char nbuf[16]; | |
4087 | ||
617ba13b | 4088 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4089 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4090 | "from previous mount: %s", errstr); |
12062ddd | 4091 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4092 | |
617ba13b MC |
4093 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4094 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4095 | ext4_commit_super(sb, 1); |
ac27a0ec | 4096 | |
dab291af | 4097 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4098 | } |
4099 | } | |
4100 | ||
4101 | /* | |
4102 | * Force the running and committing transactions to commit, | |
4103 | * and wait on the commit. | |
4104 | */ | |
617ba13b | 4105 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4106 | { |
4107 | journal_t *journal; | |
0390131b | 4108 | int ret = 0; |
ac27a0ec DK |
4109 | |
4110 | if (sb->s_flags & MS_RDONLY) | |
4111 | return 0; | |
4112 | ||
617ba13b | 4113 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4114 | if (journal) { |
437f88cc | 4115 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4116 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4117 | } |
0390131b | 4118 | |
ac27a0ec DK |
4119 | return ret; |
4120 | } | |
4121 | ||
2b2d6d01 | 4122 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4123 | { |
ebc1ac16 | 4124 | lock_super(sb); |
9ca92389 | 4125 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4126 | unlock_super(sb); |
ac27a0ec DK |
4127 | } |
4128 | ||
617ba13b | 4129 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4130 | { |
14ce0cb4 | 4131 | int ret = 0; |
9eddacf9 | 4132 | tid_t target; |
8d5d02e6 | 4133 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4134 | |
9bffad1e | 4135 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4136 | flush_workqueue(sbi->dio_unwritten_wq); |
4137 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4138 | if (wait) |
8d5d02e6 | 4139 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4140 | } |
14ce0cb4 | 4141 | return ret; |
ac27a0ec DK |
4142 | } |
4143 | ||
4144 | /* | |
4145 | * LVM calls this function before a (read-only) snapshot is created. This | |
4146 | * gives us a chance to flush the journal completely and mark the fs clean. | |
4147 | */ | |
c4be0c1d | 4148 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4149 | { |
c4be0c1d TS |
4150 | int error = 0; |
4151 | journal_t *journal; | |
ac27a0ec | 4152 | |
9ca92389 TT |
4153 | if (sb->s_flags & MS_RDONLY) |
4154 | return 0; | |
ac27a0ec | 4155 | |
9ca92389 | 4156 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4157 | |
9ca92389 TT |
4158 | /* Now we set up the journal barrier. */ |
4159 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4160 | |
9ca92389 TT |
4161 | /* |
4162 | * Don't clear the needs_recovery flag if we failed to flush | |
4163 | * the journal. | |
4164 | */ | |
4165 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4166 | if (error < 0) |
4167 | goto out; | |
9ca92389 TT |
4168 | |
4169 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4170 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4171 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4172 | out: |
4173 | /* we rely on s_frozen to stop further updates */ | |
4174 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4175 | return error; | |
ac27a0ec DK |
4176 | } |
4177 | ||
4178 | /* | |
4179 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4180 | * flag here, even though the filesystem is not technically dirty yet. | |
4181 | */ | |
c4be0c1d | 4182 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4183 | { |
9ca92389 TT |
4184 | if (sb->s_flags & MS_RDONLY) |
4185 | return 0; | |
4186 | ||
4187 | lock_super(sb); | |
4188 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4189 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4190 | ext4_commit_super(sb, 1); | |
4191 | unlock_super(sb); | |
c4be0c1d | 4192 | return 0; |
ac27a0ec DK |
4193 | } |
4194 | ||
673c6100 TT |
4195 | /* |
4196 | * Structure to save mount options for ext4_remount's benefit | |
4197 | */ | |
4198 | struct ext4_mount_options { | |
4199 | unsigned long s_mount_opt; | |
a2595b8a | 4200 | unsigned long s_mount_opt2; |
673c6100 TT |
4201 | uid_t s_resuid; |
4202 | gid_t s_resgid; | |
4203 | unsigned long s_commit_interval; | |
4204 | u32 s_min_batch_time, s_max_batch_time; | |
4205 | #ifdef CONFIG_QUOTA | |
4206 | int s_jquota_fmt; | |
4207 | char *s_qf_names[MAXQUOTAS]; | |
4208 | #endif | |
4209 | }; | |
4210 | ||
2b2d6d01 | 4211 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4212 | { |
2b2d6d01 | 4213 | struct ext4_super_block *es; |
617ba13b MC |
4214 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4215 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4216 | unsigned long old_sb_flags; |
617ba13b | 4217 | struct ext4_mount_options old_opts; |
c79d967d | 4218 | int enable_quota = 0; |
8a266467 | 4219 | ext4_group_t g; |
b3881f74 | 4220 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
4221 | int err; |
4222 | #ifdef CONFIG_QUOTA | |
4223 | int i; | |
4224 | #endif | |
d4c402d9 | 4225 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4226 | |
4227 | /* Store the original options */ | |
bbd6851a | 4228 | lock_super(sb); |
ac27a0ec DK |
4229 | old_sb_flags = sb->s_flags; |
4230 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 4231 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
4232 | old_opts.s_resuid = sbi->s_resuid; |
4233 | old_opts.s_resgid = sbi->s_resgid; | |
4234 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4235 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4236 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4237 | #ifdef CONFIG_QUOTA |
4238 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4239 | for (i = 0; i < MAXQUOTAS; i++) | |
4240 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4241 | #endif | |
b3881f74 TT |
4242 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4243 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4244 | |
4245 | /* | |
4246 | * Allow the "check" option to be passed as a remount option. | |
4247 | */ | |
b3881f74 TT |
4248 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4249 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4250 | err = -EINVAL; |
4251 | goto restore_opts; | |
4252 | } | |
4253 | ||
4ab2f15b | 4254 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4255 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4256 | |
4257 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4258 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4259 | |
4260 | es = sbi->s_es; | |
4261 | ||
b3881f74 | 4262 | if (sbi->s_journal) { |
0390131b | 4263 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4264 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4265 | } | |
ac27a0ec DK |
4266 | |
4267 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4268 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4269 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4270 | err = -EROFS; |
4271 | goto restore_opts; | |
4272 | } | |
4273 | ||
4274 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4275 | err = dquot_suspend(sb, -1); |
4276 | if (err < 0) | |
c79d967d | 4277 | goto restore_opts; |
c79d967d | 4278 | |
ac27a0ec DK |
4279 | /* |
4280 | * First of all, the unconditional stuff we have to do | |
4281 | * to disable replay of the journal when we next remount | |
4282 | */ | |
4283 | sb->s_flags |= MS_RDONLY; | |
4284 | ||
4285 | /* | |
4286 | * OK, test if we are remounting a valid rw partition | |
4287 | * readonly, and if so set the rdonly flag and then | |
4288 | * mark the partition as valid again. | |
4289 | */ | |
617ba13b MC |
4290 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4291 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4292 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4293 | ||
a63c9eb2 | 4294 | if (sbi->s_journal) |
0390131b | 4295 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4296 | } else { |
a13fb1a4 ES |
4297 | /* Make sure we can mount this feature set readwrite */ |
4298 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4299 | err = -EROFS; |
4300 | goto restore_opts; | |
4301 | } | |
8a266467 TT |
4302 | /* |
4303 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4304 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4305 | */ |
4306 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4307 | struct ext4_group_desc *gdp = | |
4308 | ext4_get_group_desc(sb, g, NULL); | |
4309 | ||
4310 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4311 | ext4_msg(sb, KERN_ERR, |
4312 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4313 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4314 | le16_to_cpu(gdp->bg_checksum)); | |
4315 | err = -EINVAL; | |
4316 | goto restore_opts; | |
4317 | } | |
4318 | } | |
4319 | ||
ead6596b ES |
4320 | /* |
4321 | * If we have an unprocessed orphan list hanging | |
4322 | * around from a previously readonly bdev mount, | |
4323 | * require a full umount/remount for now. | |
4324 | */ | |
4325 | if (es->s_last_orphan) { | |
b31e1552 | 4326 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4327 | "remount RDWR because of unprocessed " |
4328 | "orphan inode list. Please " | |
b31e1552 | 4329 | "umount/remount instead"); |
ead6596b ES |
4330 | err = -EINVAL; |
4331 | goto restore_opts; | |
4332 | } | |
4333 | ||
ac27a0ec DK |
4334 | /* |
4335 | * Mounting a RDONLY partition read-write, so reread | |
4336 | * and store the current valid flag. (It may have | |
4337 | * been changed by e2fsck since we originally mounted | |
4338 | * the partition.) | |
4339 | */ | |
0390131b FM |
4340 | if (sbi->s_journal) |
4341 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4342 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4343 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4344 | goto restore_opts; |
2b2d6d01 | 4345 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4346 | sb->s_flags &= ~MS_RDONLY; |
c79d967d | 4347 | enable_quota = 1; |
ac27a0ec DK |
4348 | } |
4349 | } | |
bfff6873 LC |
4350 | |
4351 | /* | |
4352 | * Reinitialize lazy itable initialization thread based on | |
4353 | * current settings | |
4354 | */ | |
4355 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4356 | ext4_unregister_li_request(sb); | |
4357 | else { | |
4358 | ext4_group_t first_not_zeroed; | |
4359 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4360 | ext4_register_li_request(sb, first_not_zeroed); | |
4361 | } | |
4362 | ||
6fd058f7 | 4363 | ext4_setup_system_zone(sb); |
0390131b | 4364 | if (sbi->s_journal == NULL) |
e2d67052 | 4365 | ext4_commit_super(sb, 1); |
0390131b | 4366 | |
ac27a0ec DK |
4367 | #ifdef CONFIG_QUOTA |
4368 | /* Release old quota file names */ | |
4369 | for (i = 0; i < MAXQUOTAS; i++) | |
4370 | if (old_opts.s_qf_names[i] && | |
4371 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4372 | kfree(old_opts.s_qf_names[i]); | |
4373 | #endif | |
bbd6851a | 4374 | unlock_super(sb); |
c79d967d | 4375 | if (enable_quota) |
0f0dd62f | 4376 | dquot_resume(sb, -1); |
d4c402d9 CW |
4377 | |
4378 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4379 | kfree(orig_data); | |
ac27a0ec | 4380 | return 0; |
0b8e58a1 | 4381 | |
ac27a0ec DK |
4382 | restore_opts: |
4383 | sb->s_flags = old_sb_flags; | |
4384 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 4385 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
4386 | sbi->s_resuid = old_opts.s_resuid; |
4387 | sbi->s_resgid = old_opts.s_resgid; | |
4388 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4389 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4390 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4391 | #ifdef CONFIG_QUOTA |
4392 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4393 | for (i = 0; i < MAXQUOTAS; i++) { | |
4394 | if (sbi->s_qf_names[i] && | |
4395 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4396 | kfree(sbi->s_qf_names[i]); | |
4397 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4398 | } | |
4399 | #endif | |
bbd6851a | 4400 | unlock_super(sb); |
d4c402d9 | 4401 | kfree(orig_data); |
ac27a0ec DK |
4402 | return err; |
4403 | } | |
4404 | ||
2b2d6d01 | 4405 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4406 | { |
4407 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4408 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4409 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 4410 | u64 fsid; |
ac27a0ec | 4411 | |
5e70030d BP |
4412 | if (test_opt(sb, MINIX_DF)) { |
4413 | sbi->s_overhead_last = 0; | |
6bc9feff | 4414 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4415 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4416 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4417 | |
4418 | /* | |
5e70030d BP |
4419 | * Compute the overhead (FS structures). This is constant |
4420 | * for a given filesystem unless the number of block groups | |
4421 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4422 | */ |
4423 | ||
4424 | /* | |
4425 | * All of the blocks before first_data_block are | |
4426 | * overhead | |
4427 | */ | |
4428 | overhead = le32_to_cpu(es->s_first_data_block); | |
4429 | ||
4430 | /* | |
4431 | * Add the overhead attributed to the superblock and | |
4432 | * block group descriptors. If the sparse superblocks | |
4433 | * feature is turned on, then not all groups have this. | |
4434 | */ | |
4435 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
4436 | overhead += ext4_bg_has_super(sb, i) + |
4437 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
4438 | cond_resched(); |
4439 | } | |
4440 | ||
4441 | /* | |
4442 | * Every block group has an inode bitmap, a block | |
4443 | * bitmap, and an inode table. | |
4444 | */ | |
5e70030d BP |
4445 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
4446 | sbi->s_overhead_last = overhead; | |
4447 | smp_wmb(); | |
6bc9feff | 4448 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4449 | } |
4450 | ||
617ba13b | 4451 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4452 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 4453 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
4454 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
4455 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
4456 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4457 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4458 | buf->f_bavail = 0; |
4459 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4460 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4461 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4462 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4463 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4464 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4465 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4466 | |
ac27a0ec DK |
4467 | return 0; |
4468 | } | |
4469 | ||
0b8e58a1 AD |
4470 | /* Helper function for writing quotas on sync - we need to start transaction |
4471 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4472 | * Process 1 Process 2 |
617ba13b | 4473 | * ext4_create() quota_sync() |
a269eb18 | 4474 | * jbd2_journal_start() write_dquot() |
871a2931 | 4475 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4476 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4477 | * |
4478 | */ | |
4479 | ||
4480 | #ifdef CONFIG_QUOTA | |
4481 | ||
4482 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4483 | { | |
4484 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4485 | } | |
4486 | ||
617ba13b | 4487 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4488 | { |
4489 | int ret, err; | |
4490 | handle_t *handle; | |
4491 | struct inode *inode; | |
4492 | ||
4493 | inode = dquot_to_inode(dquot); | |
617ba13b | 4494 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4495 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4496 | if (IS_ERR(handle)) |
4497 | return PTR_ERR(handle); | |
4498 | ret = dquot_commit(dquot); | |
617ba13b | 4499 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4500 | if (!ret) |
4501 | ret = err; | |
4502 | return ret; | |
4503 | } | |
4504 | ||
617ba13b | 4505 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4506 | { |
4507 | int ret, err; | |
4508 | handle_t *handle; | |
4509 | ||
617ba13b | 4510 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4511 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4512 | if (IS_ERR(handle)) |
4513 | return PTR_ERR(handle); | |
4514 | ret = dquot_acquire(dquot); | |
617ba13b | 4515 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4516 | if (!ret) |
4517 | ret = err; | |
4518 | return ret; | |
4519 | } | |
4520 | ||
617ba13b | 4521 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4522 | { |
4523 | int ret, err; | |
4524 | handle_t *handle; | |
4525 | ||
617ba13b | 4526 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4527 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4528 | if (IS_ERR(handle)) { |
4529 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4530 | dquot_release(dquot); | |
ac27a0ec | 4531 | return PTR_ERR(handle); |
9c3013e9 | 4532 | } |
ac27a0ec | 4533 | ret = dquot_release(dquot); |
617ba13b | 4534 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4535 | if (!ret) |
4536 | ret = err; | |
4537 | return ret; | |
4538 | } | |
4539 | ||
617ba13b | 4540 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4541 | { |
2c8be6b2 | 4542 | /* Are we journaling quotas? */ |
617ba13b MC |
4543 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4544 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4545 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4546 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4547 | } else { |
4548 | return dquot_mark_dquot_dirty(dquot); | |
4549 | } | |
4550 | } | |
4551 | ||
617ba13b | 4552 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4553 | { |
4554 | int ret, err; | |
4555 | handle_t *handle; | |
4556 | ||
4557 | /* Data block + inode block */ | |
617ba13b | 4558 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4559 | if (IS_ERR(handle)) |
4560 | return PTR_ERR(handle); | |
4561 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4562 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4563 | if (!ret) |
4564 | ret = err; | |
4565 | return ret; | |
4566 | } | |
4567 | ||
4568 | /* | |
4569 | * Turn on quotas during mount time - we need to find | |
4570 | * the quota file and such... | |
4571 | */ | |
617ba13b | 4572 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4573 | { |
287a8095 CH |
4574 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4575 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4576 | } |
4577 | ||
4578 | /* | |
4579 | * Standard function to be called on quota_on | |
4580 | */ | |
617ba13b | 4581 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
f00c9e44 | 4582 | struct path *path) |
ac27a0ec DK |
4583 | { |
4584 | int err; | |
ac27a0ec DK |
4585 | |
4586 | if (!test_opt(sb, QUOTA)) | |
4587 | return -EINVAL; | |
0623543b | 4588 | |
ac27a0ec | 4589 | /* Quotafile not on the same filesystem? */ |
f00c9e44 | 4590 | if (path->mnt->mnt_sb != sb) |
ac27a0ec | 4591 | return -EXDEV; |
0623543b JK |
4592 | /* Journaling quota? */ |
4593 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4594 | /* Quotafile not in fs root? */ |
f00c9e44 | 4595 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
4596 | ext4_msg(sb, KERN_WARNING, |
4597 | "Quota file not on filesystem root. " | |
4598 | "Journaled quota will not work"); | |
2b2d6d01 | 4599 | } |
0623543b JK |
4600 | |
4601 | /* | |
4602 | * When we journal data on quota file, we have to flush journal to see | |
4603 | * all updates to the file when we bypass pagecache... | |
4604 | */ | |
0390131b | 4605 | if (EXT4_SB(sb)->s_journal && |
f00c9e44 | 4606 | ext4_should_journal_data(path->dentry->d_inode)) { |
0623543b JK |
4607 | /* |
4608 | * We don't need to lock updates but journal_flush() could | |
4609 | * otherwise be livelocked... | |
4610 | */ | |
4611 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4612 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4613 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
f00c9e44 | 4614 | if (err) |
7ffe1ea8 | 4615 | return err; |
0623543b JK |
4616 | } |
4617 | ||
f00c9e44 | 4618 | return dquot_quota_on(sb, type, format_id, path); |
ac27a0ec DK |
4619 | } |
4620 | ||
ca0e05e4 DM |
4621 | static int ext4_quota_off(struct super_block *sb, int type) |
4622 | { | |
21f97697 JK |
4623 | struct inode *inode = sb_dqopt(sb)->files[type]; |
4624 | handle_t *handle; | |
4625 | ||
87009d86 DM |
4626 | /* Force all delayed allocation blocks to be allocated. |
4627 | * Caller already holds s_umount sem */ | |
4628 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4629 | sync_filesystem(sb); |
ca0e05e4 | 4630 | |
21f97697 JK |
4631 | /* Update modification times of quota files when userspace can |
4632 | * start looking at them */ | |
4633 | handle = ext4_journal_start(inode, 1); | |
4634 | if (IS_ERR(handle)) | |
4635 | goto out; | |
4636 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
4637 | ext4_mark_inode_dirty(handle, inode); | |
4638 | ext4_journal_stop(handle); | |
4639 | ||
4640 | out: | |
ca0e05e4 DM |
4641 | return dquot_quota_off(sb, type); |
4642 | } | |
4643 | ||
ac27a0ec DK |
4644 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4645 | * acquiring the locks... As quota files are never truncated and quota code | |
4646 | * itself serializes the operations (and noone else should touch the files) | |
4647 | * we don't have to be afraid of races */ | |
617ba13b | 4648 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4649 | size_t len, loff_t off) |
4650 | { | |
4651 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4652 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4653 | int err = 0; |
4654 | int offset = off & (sb->s_blocksize - 1); | |
4655 | int tocopy; | |
4656 | size_t toread; | |
4657 | struct buffer_head *bh; | |
4658 | loff_t i_size = i_size_read(inode); | |
4659 | ||
4660 | if (off > i_size) | |
4661 | return 0; | |
4662 | if (off+len > i_size) | |
4663 | len = i_size-off; | |
4664 | toread = len; | |
4665 | while (toread > 0) { | |
4666 | tocopy = sb->s_blocksize - offset < toread ? | |
4667 | sb->s_blocksize - offset : toread; | |
617ba13b | 4668 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4669 | if (err) |
4670 | return err; | |
4671 | if (!bh) /* A hole? */ | |
4672 | memset(data, 0, tocopy); | |
4673 | else | |
4674 | memcpy(data, bh->b_data+offset, tocopy); | |
4675 | brelse(bh); | |
4676 | offset = 0; | |
4677 | toread -= tocopy; | |
4678 | data += tocopy; | |
4679 | blk++; | |
4680 | } | |
4681 | return len; | |
4682 | } | |
4683 | ||
4684 | /* Write to quotafile (we know the transaction is already started and has | |
4685 | * enough credits) */ | |
617ba13b | 4686 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4687 | const char *data, size_t len, loff_t off) |
4688 | { | |
4689 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4690 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4691 | int err = 0; |
4692 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4693 | struct buffer_head *bh; |
4694 | handle_t *handle = journal_current_handle(); | |
4695 | ||
0390131b | 4696 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4697 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4698 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4699 | (unsigned long long)off, (unsigned long long)len); |
4700 | return -EIO; | |
4701 | } | |
67eeb568 DM |
4702 | /* |
4703 | * Since we account only one data block in transaction credits, | |
4704 | * then it is impossible to cross a block boundary. | |
4705 | */ | |
4706 | if (sb->s_blocksize - offset < len) { | |
4707 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4708 | " cancelled because not block aligned", | |
4709 | (unsigned long long)off, (unsigned long long)len); | |
4710 | return -EIO; | |
4711 | } | |
4712 | ||
ac27a0ec | 4713 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4714 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4715 | if (!bh) | |
4716 | goto out; | |
62d2b5f2 JK |
4717 | err = ext4_journal_get_write_access(handle, bh); |
4718 | if (err) { | |
4719 | brelse(bh); | |
4720 | goto out; | |
ac27a0ec | 4721 | } |
67eeb568 DM |
4722 | lock_buffer(bh); |
4723 | memcpy(bh->b_data+offset, data, len); | |
4724 | flush_dcache_page(bh->b_page); | |
4725 | unlock_buffer(bh); | |
62d2b5f2 | 4726 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4727 | brelse(bh); |
ac27a0ec | 4728 | out: |
67eeb568 | 4729 | if (err) { |
4d04e4fb | 4730 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4731 | return err; |
4d04e4fb | 4732 | } |
67eeb568 DM |
4733 | if (inode->i_size < off + len) { |
4734 | i_size_write(inode, off + len); | |
617ba13b | 4735 | EXT4_I(inode)->i_disksize = inode->i_size; |
21f97697 | 4736 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4737 | } |
ac27a0ec | 4738 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4739 | return len; |
ac27a0ec DK |
4740 | } |
4741 | ||
4742 | #endif | |
4743 | ||
152a0836 AV |
4744 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4745 | const char *dev_name, void *data) | |
ac27a0ec | 4746 | { |
152a0836 | 4747 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4748 | } |
4749 | ||
37f328eb | 4750 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4751 | static struct file_system_type ext2_fs_type = { |
4752 | .owner = THIS_MODULE, | |
4753 | .name = "ext2", | |
152a0836 | 4754 | .mount = ext4_mount, |
24b58424 TT |
4755 | .kill_sb = kill_block_super, |
4756 | .fs_flags = FS_REQUIRES_DEV, | |
4757 | }; | |
4758 | ||
4759 | static inline void register_as_ext2(void) | |
4760 | { | |
4761 | int err = register_filesystem(&ext2_fs_type); | |
4762 | if (err) | |
4763 | printk(KERN_WARNING | |
4764 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4765 | } | |
4766 | ||
4767 | static inline void unregister_as_ext2(void) | |
4768 | { | |
4769 | unregister_filesystem(&ext2_fs_type); | |
4770 | } | |
51b7e3c9 | 4771 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4772 | #else |
4773 | static inline void register_as_ext2(void) { } | |
4774 | static inline void unregister_as_ext2(void) { } | |
4775 | #endif | |
4776 | ||
37f328eb | 4777 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4778 | static inline void register_as_ext3(void) |
4779 | { | |
4780 | int err = register_filesystem(&ext3_fs_type); | |
4781 | if (err) | |
4782 | printk(KERN_WARNING | |
4783 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4784 | } | |
4785 | ||
4786 | static inline void unregister_as_ext3(void) | |
4787 | { | |
4788 | unregister_filesystem(&ext3_fs_type); | |
4789 | } | |
51b7e3c9 | 4790 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4791 | #else |
4792 | static inline void register_as_ext3(void) { } | |
4793 | static inline void unregister_as_ext3(void) { } | |
4794 | #endif | |
4795 | ||
03010a33 TT |
4796 | static struct file_system_type ext4_fs_type = { |
4797 | .owner = THIS_MODULE, | |
4798 | .name = "ext4", | |
152a0836 | 4799 | .mount = ext4_mount, |
03010a33 TT |
4800 | .kill_sb = kill_block_super, |
4801 | .fs_flags = FS_REQUIRES_DEV, | |
4802 | }; | |
4803 | ||
8f021222 | 4804 | static int __init ext4_init_feat_adverts(void) |
857ac889 LC |
4805 | { |
4806 | struct ext4_features *ef; | |
4807 | int ret = -ENOMEM; | |
4808 | ||
4809 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
4810 | if (!ef) | |
4811 | goto out; | |
4812 | ||
4813 | ef->f_kobj.kset = ext4_kset; | |
4814 | init_completion(&ef->f_kobj_unregister); | |
4815 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
4816 | "features"); | |
4817 | if (ret) { | |
4818 | kfree(ef); | |
4819 | goto out; | |
4820 | } | |
4821 | ||
4822 | ext4_feat = ef; | |
4823 | ret = 0; | |
4824 | out: | |
4825 | return ret; | |
4826 | } | |
4827 | ||
8f021222 LC |
4828 | static void ext4_exit_feat_adverts(void) |
4829 | { | |
4830 | kobject_put(&ext4_feat->f_kobj); | |
4831 | wait_for_completion(&ext4_feat->f_kobj_unregister); | |
4832 | kfree(ext4_feat); | |
4833 | } | |
4834 | ||
e9e3bcec ES |
4835 | /* Shared across all ext4 file systems */ |
4836 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
4837 | struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; | |
4838 | ||
5dabfc78 | 4839 | static int __init ext4_init_fs(void) |
ac27a0ec | 4840 | { |
e9e3bcec | 4841 | int i, err; |
c9de560d | 4842 | |
12e9b892 | 4843 | ext4_check_flag_values(); |
e9e3bcec ES |
4844 | |
4845 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { | |
4846 | mutex_init(&ext4__aio_mutex[i]); | |
4847 | init_waitqueue_head(&ext4__ioend_wq[i]); | |
4848 | } | |
4849 | ||
5dabfc78 | 4850 | err = ext4_init_pageio(); |
6fd058f7 TT |
4851 | if (err) |
4852 | return err; | |
5dabfc78 | 4853 | err = ext4_init_system_zone(); |
bd2d0210 | 4854 | if (err) |
dd68314c | 4855 | goto out7; |
3197ebdb TT |
4856 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4857 | if (!ext4_kset) | |
dd68314c | 4858 | goto out6; |
9f6200bb | 4859 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
dd68314c TT |
4860 | if (!ext4_proc_root) |
4861 | goto out5; | |
857ac889 LC |
4862 | |
4863 | err = ext4_init_feat_adverts(); | |
dd68314c TT |
4864 | if (err) |
4865 | goto out4; | |
857ac889 | 4866 | |
5dabfc78 | 4867 | err = ext4_init_mballoc(); |
ac27a0ec | 4868 | if (err) |
6fd058f7 | 4869 | goto out3; |
c9de560d | 4870 | |
5dabfc78 | 4871 | err = ext4_init_xattr(); |
c9de560d AT |
4872 | if (err) |
4873 | goto out2; | |
ac27a0ec DK |
4874 | err = init_inodecache(); |
4875 | if (err) | |
4876 | goto out1; | |
24b58424 TT |
4877 | register_as_ext2(); |
4878 | register_as_ext3(); | |
03010a33 | 4879 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4880 | if (err) |
4881 | goto out; | |
bfff6873 LC |
4882 | |
4883 | ext4_li_info = NULL; | |
4884 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
4885 | return 0; |
4886 | out: | |
24b58424 TT |
4887 | unregister_as_ext2(); |
4888 | unregister_as_ext3(); | |
ac27a0ec DK |
4889 | destroy_inodecache(); |
4890 | out1: | |
5dabfc78 | 4891 | ext4_exit_xattr(); |
c9de560d | 4892 | out2: |
5dabfc78 | 4893 | ext4_exit_mballoc(); |
6fd058f7 | 4894 | out3: |
8f021222 | 4895 | ext4_exit_feat_adverts(); |
dd68314c | 4896 | out4: |
6fd058f7 | 4897 | remove_proc_entry("fs/ext4", NULL); |
dd68314c | 4898 | out5: |
6fd058f7 | 4899 | kset_unregister(ext4_kset); |
dd68314c | 4900 | out6: |
5dabfc78 | 4901 | ext4_exit_system_zone(); |
dd68314c | 4902 | out7: |
5dabfc78 | 4903 | ext4_exit_pageio(); |
ac27a0ec DK |
4904 | return err; |
4905 | } | |
4906 | ||
5dabfc78 | 4907 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 4908 | { |
bfff6873 | 4909 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
4910 | unregister_as_ext2(); |
4911 | unregister_as_ext3(); | |
03010a33 | 4912 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4913 | destroy_inodecache(); |
5dabfc78 TT |
4914 | ext4_exit_xattr(); |
4915 | ext4_exit_mballoc(); | |
8f021222 | 4916 | ext4_exit_feat_adverts(); |
9f6200bb | 4917 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4918 | kset_unregister(ext4_kset); |
5dabfc78 TT |
4919 | ext4_exit_system_zone(); |
4920 | ext4_exit_pageio(); | |
ac27a0ec DK |
4921 | } |
4922 | ||
4923 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4924 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4925 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
4926 | module_init(ext4_init_fs) |
4927 | module_exit(ext4_exit_fs) |