]>
Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
aff063e2 JK |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/backing-dev.h> | |
17 | #include <linux/kthread.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/seq_file.h> | |
5e176d54 | 21 | #include <linux/proc_fs.h> |
aff063e2 JK |
22 | #include <linux/random.h> |
23 | #include <linux/exportfs.h> | |
d3ee456d | 24 | #include <linux/blkdev.h> |
aff063e2 JK |
25 | #include <linux/f2fs_fs.h> |
26 | ||
27 | #include "f2fs.h" | |
28 | #include "node.h" | |
5ec4e49f | 29 | #include "segment.h" |
aff063e2 JK |
30 | #include "xattr.h" |
31 | ||
a2a4a7e4 NJ |
32 | #define CREATE_TRACE_POINTS |
33 | #include <trace/events/f2fs.h> | |
34 | ||
5e176d54 | 35 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 JK |
36 | static struct kmem_cache *f2fs_inode_cachep; |
37 | ||
38 | enum { | |
696c018c | 39 | Opt_gc_background, |
aff063e2 JK |
40 | Opt_disable_roll_forward, |
41 | Opt_discard, | |
42 | Opt_noheap, | |
43 | Opt_nouser_xattr, | |
44 | Opt_noacl, | |
45 | Opt_active_logs, | |
46 | Opt_disable_ext_identify, | |
47 | Opt_err, | |
48 | }; | |
49 | ||
50 | static match_table_t f2fs_tokens = { | |
696c018c | 51 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
52 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
53 | {Opt_discard, "discard"}, | |
54 | {Opt_noheap, "no_heap"}, | |
55 | {Opt_nouser_xattr, "nouser_xattr"}, | |
56 | {Opt_noacl, "noacl"}, | |
57 | {Opt_active_logs, "active_logs=%u"}, | |
58 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
59 | {Opt_err, NULL}, | |
60 | }; | |
61 | ||
a07ef784 NJ |
62 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
63 | { | |
64 | struct va_format vaf; | |
65 | va_list args; | |
66 | ||
67 | va_start(args, fmt); | |
68 | vaf.fmt = fmt; | |
69 | vaf.va = &args; | |
70 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
71 | va_end(args); | |
72 | } | |
73 | ||
aff063e2 JK |
74 | static void init_once(void *foo) |
75 | { | |
76 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
77 | ||
aff063e2 JK |
78 | inode_init_once(&fi->vfs_inode); |
79 | } | |
80 | ||
696c018c NJ |
81 | static int parse_options(struct super_block *sb, char *options) |
82 | { | |
83 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
84 | substring_t args[MAX_OPT_ARGS]; | |
85 | char *p, *name; | |
86 | int arg = 0; | |
87 | ||
88 | if (!options) | |
89 | return 0; | |
90 | ||
91 | while ((p = strsep(&options, ",")) != NULL) { | |
92 | int token; | |
93 | if (!*p) | |
94 | continue; | |
95 | /* | |
96 | * Initialize args struct so we know whether arg was | |
97 | * found; some options take optional arguments. | |
98 | */ | |
99 | args[0].to = args[0].from = NULL; | |
100 | token = match_token(p, f2fs_tokens, args); | |
101 | ||
102 | switch (token) { | |
103 | case Opt_gc_background: | |
104 | name = match_strdup(&args[0]); | |
105 | ||
106 | if (!name) | |
107 | return -ENOMEM; | |
108 | if (!strncmp(name, "on", 2)) | |
109 | set_opt(sbi, BG_GC); | |
110 | else if (!strncmp(name, "off", 3)) | |
111 | clear_opt(sbi, BG_GC); | |
112 | else { | |
113 | kfree(name); | |
114 | return -EINVAL; | |
115 | } | |
116 | kfree(name); | |
117 | break; | |
118 | case Opt_disable_roll_forward: | |
119 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
120 | break; | |
121 | case Opt_discard: | |
122 | set_opt(sbi, DISCARD); | |
123 | break; | |
124 | case Opt_noheap: | |
125 | set_opt(sbi, NOHEAP); | |
126 | break; | |
127 | #ifdef CONFIG_F2FS_FS_XATTR | |
128 | case Opt_nouser_xattr: | |
129 | clear_opt(sbi, XATTR_USER); | |
130 | break; | |
131 | #else | |
132 | case Opt_nouser_xattr: | |
133 | f2fs_msg(sb, KERN_INFO, | |
134 | "nouser_xattr options not supported"); | |
135 | break; | |
136 | #endif | |
137 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
138 | case Opt_noacl: | |
139 | clear_opt(sbi, POSIX_ACL); | |
140 | break; | |
141 | #else | |
142 | case Opt_noacl: | |
143 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
144 | break; | |
145 | #endif | |
146 | case Opt_active_logs: | |
147 | if (args->from && match_int(args, &arg)) | |
148 | return -EINVAL; | |
149 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
150 | return -EINVAL; | |
151 | sbi->active_logs = arg; | |
152 | break; | |
153 | case Opt_disable_ext_identify: | |
154 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
155 | break; | |
156 | default: | |
157 | f2fs_msg(sb, KERN_ERR, | |
158 | "Unrecognized mount option \"%s\" or missing value", | |
159 | p); | |
160 | return -EINVAL; | |
161 | } | |
162 | } | |
163 | return 0; | |
164 | } | |
165 | ||
aff063e2 JK |
166 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
167 | { | |
168 | struct f2fs_inode_info *fi; | |
169 | ||
170 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
171 | if (!fi) | |
172 | return NULL; | |
173 | ||
174 | init_once((void *) fi); | |
175 | ||
434720fa | 176 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
177 | fi->vfs_inode.i_version = 1; |
178 | atomic_set(&fi->dirty_dents, 0); | |
179 | fi->i_current_depth = 1; | |
180 | fi->i_advise = 0; | |
181 | rwlock_init(&fi->ext.ext_lock); | |
182 | ||
183 | set_inode_flag(fi, FI_NEW_INODE); | |
184 | ||
185 | return &fi->vfs_inode; | |
186 | } | |
187 | ||
531ad7d5 JK |
188 | static int f2fs_drop_inode(struct inode *inode) |
189 | { | |
190 | /* | |
191 | * This is to avoid a deadlock condition like below. | |
192 | * writeback_single_inode(inode) | |
193 | * - f2fs_write_data_page | |
194 | * - f2fs_gc -> iput -> evict | |
195 | * - inode_wait_for_writeback(inode) | |
196 | */ | |
197 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
198 | return 0; | |
199 | return generic_drop_inode(inode); | |
200 | } | |
201 | ||
b3783873 JK |
202 | /* |
203 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
204 | * | |
205 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
206 | */ | |
207 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
208 | { | |
209 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
210 | return; | |
211 | } | |
212 | ||
aff063e2 JK |
213 | static void f2fs_i_callback(struct rcu_head *head) |
214 | { | |
215 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
216 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
217 | } | |
218 | ||
25ca923b | 219 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
220 | { |
221 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
222 | } | |
223 | ||
224 | static void f2fs_put_super(struct super_block *sb) | |
225 | { | |
226 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
227 | ||
5e176d54 JK |
228 | if (sbi->s_proc) { |
229 | remove_proc_entry("segment_info", sbi->s_proc); | |
230 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
231 | } | |
232 | ||
aff063e2 JK |
233 | f2fs_destroy_stats(sbi); |
234 | stop_gc_thread(sbi); | |
235 | ||
43727527 | 236 | write_checkpoint(sbi, true); |
aff063e2 JK |
237 | |
238 | iput(sbi->node_inode); | |
239 | iput(sbi->meta_inode); | |
240 | ||
241 | /* destroy f2fs internal modules */ | |
242 | destroy_node_manager(sbi); | |
243 | destroy_segment_manager(sbi); | |
244 | ||
245 | kfree(sbi->ckpt); | |
246 | ||
247 | sb->s_fs_info = NULL; | |
248 | brelse(sbi->raw_super_buf); | |
249 | kfree(sbi); | |
250 | } | |
251 | ||
252 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
253 | { | |
254 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 255 | |
a2a4a7e4 NJ |
256 | trace_f2fs_sync_fs(sb, sync); |
257 | ||
aff063e2 JK |
258 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
259 | return 0; | |
260 | ||
b7473754 JK |
261 | if (sync) { |
262 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 263 | write_checkpoint(sbi, false); |
b7473754 JK |
264 | mutex_unlock(&sbi->gc_mutex); |
265 | } else { | |
7d82db83 | 266 | f2fs_balance_fs(sbi); |
b7473754 | 267 | } |
aff063e2 | 268 | |
64c576fe | 269 | return 0; |
aff063e2 JK |
270 | } |
271 | ||
d6212a5f CL |
272 | static int f2fs_freeze(struct super_block *sb) |
273 | { | |
274 | int err; | |
275 | ||
77888c1e | 276 | if (f2fs_readonly(sb)) |
d6212a5f CL |
277 | return 0; |
278 | ||
279 | err = f2fs_sync_fs(sb, 1); | |
280 | return err; | |
281 | } | |
282 | ||
283 | static int f2fs_unfreeze(struct super_block *sb) | |
284 | { | |
285 | return 0; | |
286 | } | |
287 | ||
aff063e2 JK |
288 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
289 | { | |
290 | struct super_block *sb = dentry->d_sb; | |
291 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
292 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
293 | block_t total_count, user_block_count, start_count, ovp_count; | |
294 | ||
295 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
296 | user_block_count = sbi->user_block_count; | |
297 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
298 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
299 | buf->f_type = F2FS_SUPER_MAGIC; | |
300 | buf->f_bsize = sbi->blocksize; | |
301 | ||
302 | buf->f_blocks = total_count - start_count; | |
303 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
304 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
305 | ||
1362b5e3 JK |
306 | buf->f_files = sbi->total_node_count; |
307 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 308 | |
5a20d339 | 309 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
310 | buf->f_fsid.val[0] = (u32)id; |
311 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
317 | { | |
318 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
319 | ||
696c018c NJ |
320 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
321 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 322 | else |
696c018c | 323 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
324 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
325 | seq_puts(seq, ",disable_roll_forward"); | |
326 | if (test_opt(sbi, DISCARD)) | |
327 | seq_puts(seq, ",discard"); | |
328 | if (test_opt(sbi, NOHEAP)) | |
329 | seq_puts(seq, ",no_heap_alloc"); | |
330 | #ifdef CONFIG_F2FS_FS_XATTR | |
331 | if (test_opt(sbi, XATTR_USER)) | |
332 | seq_puts(seq, ",user_xattr"); | |
333 | else | |
334 | seq_puts(seq, ",nouser_xattr"); | |
335 | #endif | |
336 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
337 | if (test_opt(sbi, POSIX_ACL)) | |
338 | seq_puts(seq, ",acl"); | |
339 | else | |
340 | seq_puts(seq, ",noacl"); | |
341 | #endif | |
342 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 343 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
344 | |
345 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
5e176d54 JK |
350 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
351 | { | |
352 | struct super_block *sb = seq->private; | |
353 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
354 | unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); | |
355 | int i; | |
356 | ||
357 | for (i = 0; i < total_segs; i++) { | |
358 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
359 | if (i != 0 && (i % 10) == 0) | |
360 | seq_puts(seq, "\n"); | |
361 | else | |
362 | seq_puts(seq, " "); | |
363 | } | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
368 | { | |
369 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
370 | } | |
371 | ||
372 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
373 | .owner = THIS_MODULE, | |
374 | .open = segment_info_open_fs, | |
375 | .read = seq_read, | |
376 | .llseek = seq_lseek, | |
377 | .release = single_release, | |
378 | }; | |
379 | ||
696c018c NJ |
380 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
381 | { | |
382 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
383 | struct f2fs_mount_info org_mount_opt; | |
384 | int err, active_logs; | |
385 | ||
386 | /* | |
387 | * Save the old mount options in case we | |
388 | * need to restore them. | |
389 | */ | |
390 | org_mount_opt = sbi->mount_opt; | |
391 | active_logs = sbi->active_logs; | |
392 | ||
393 | /* parse mount options */ | |
394 | err = parse_options(sb, data); | |
395 | if (err) | |
396 | goto restore_opts; | |
397 | ||
398 | /* | |
399 | * Previous and new state of filesystem is RO, | |
400 | * so no point in checking GC conditions. | |
401 | */ | |
402 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
403 | goto skip; | |
404 | ||
405 | /* | |
406 | * We stop the GC thread if FS is mounted as RO | |
407 | * or if background_gc = off is passed in mount | |
408 | * option. Also sync the filesystem. | |
409 | */ | |
410 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
411 | if (sbi->gc_thread) { | |
412 | stop_gc_thread(sbi); | |
413 | f2fs_sync_fs(sb, 1); | |
414 | } | |
415 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
416 | err = start_gc_thread(sbi); | |
417 | if (err) | |
418 | goto restore_opts; | |
419 | } | |
420 | skip: | |
421 | /* Update the POSIXACL Flag */ | |
422 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
423 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
424 | return 0; | |
425 | ||
426 | restore_opts: | |
427 | sbi->mount_opt = org_mount_opt; | |
428 | sbi->active_logs = active_logs; | |
429 | return err; | |
430 | } | |
431 | ||
aff063e2 JK |
432 | static struct super_operations f2fs_sops = { |
433 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 434 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
435 | .destroy_inode = f2fs_destroy_inode, |
436 | .write_inode = f2fs_write_inode, | |
b3783873 | 437 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
438 | .show_options = f2fs_show_options, |
439 | .evict_inode = f2fs_evict_inode, | |
440 | .put_super = f2fs_put_super, | |
441 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
442 | .freeze_fs = f2fs_freeze, |
443 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 444 | .statfs = f2fs_statfs, |
696c018c | 445 | .remount_fs = f2fs_remount, |
aff063e2 JK |
446 | }; |
447 | ||
448 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
449 | u64 ino, u32 generation) | |
450 | { | |
451 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
452 | struct inode *inode; | |
453 | ||
454 | if (ino < F2FS_ROOT_INO(sbi)) | |
455 | return ERR_PTR(-ESTALE); | |
456 | ||
457 | /* | |
458 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
459 | * However f2fs_iget currently does appropriate checks to handle stale | |
460 | * inodes so everything is OK. | |
461 | */ | |
462 | inode = f2fs_iget(sb, ino); | |
463 | if (IS_ERR(inode)) | |
464 | return ERR_CAST(inode); | |
465 | if (generation && inode->i_generation != generation) { | |
466 | /* we didn't find the right inode.. */ | |
467 | iput(inode); | |
468 | return ERR_PTR(-ESTALE); | |
469 | } | |
470 | return inode; | |
471 | } | |
472 | ||
473 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
474 | int fh_len, int fh_type) | |
475 | { | |
476 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
477 | f2fs_nfs_get_inode); | |
478 | } | |
479 | ||
480 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
481 | int fh_len, int fh_type) | |
482 | { | |
483 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
484 | f2fs_nfs_get_inode); | |
485 | } | |
486 | ||
487 | static const struct export_operations f2fs_export_ops = { | |
488 | .fh_to_dentry = f2fs_fh_to_dentry, | |
489 | .fh_to_parent = f2fs_fh_to_parent, | |
490 | .get_parent = f2fs_get_parent, | |
491 | }; | |
492 | ||
aff063e2 JK |
493 | static loff_t max_file_size(unsigned bits) |
494 | { | |
495 | loff_t result = ADDRS_PER_INODE; | |
496 | loff_t leaf_count = ADDRS_PER_BLOCK; | |
497 | ||
498 | /* two direct node blocks */ | |
499 | result += (leaf_count * 2); | |
500 | ||
501 | /* two indirect node blocks */ | |
502 | leaf_count *= NIDS_PER_BLOCK; | |
503 | result += (leaf_count * 2); | |
504 | ||
505 | /* one double indirect node block */ | |
506 | leaf_count *= NIDS_PER_BLOCK; | |
507 | result += leaf_count; | |
508 | ||
509 | result <<= bits; | |
510 | return result; | |
511 | } | |
512 | ||
a07ef784 NJ |
513 | static int sanity_check_raw_super(struct super_block *sb, |
514 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
515 | { |
516 | unsigned int blocksize; | |
517 | ||
a07ef784 NJ |
518 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
519 | f2fs_msg(sb, KERN_INFO, | |
520 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
521 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 522 | return 1; |
a07ef784 | 523 | } |
aff063e2 | 524 | |
5c9b4692 | 525 | /* Currently, support only 4KB page cache size */ |
526 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
527 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 528 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 529 | PAGE_CACHE_SIZE); |
530 | return 1; | |
531 | } | |
532 | ||
aff063e2 JK |
533 | /* Currently, support only 4KB block size */ |
534 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 535 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
536 | f2fs_msg(sb, KERN_INFO, |
537 | "Invalid blocksize (%u), supports only 4KB\n", | |
538 | blocksize); | |
aff063e2 | 539 | return 1; |
a07ef784 | 540 | } |
5c9b4692 | 541 | |
aff063e2 | 542 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
543 | F2FS_LOG_SECTOR_SIZE) { |
544 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 545 | return 1; |
a07ef784 | 546 | } |
aff063e2 | 547 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
548 | F2FS_LOG_SECTORS_PER_BLOCK) { |
549 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 550 | return 1; |
a07ef784 | 551 | } |
aff063e2 JK |
552 | return 0; |
553 | } | |
554 | ||
577e3495 | 555 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
556 | { |
557 | unsigned int total, fsmeta; | |
577e3495 JK |
558 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
559 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
560 | |
561 | total = le32_to_cpu(raw_super->segment_count); | |
562 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
563 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
564 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
565 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
566 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
567 | ||
568 | if (fsmeta >= total) | |
569 | return 1; | |
577e3495 JK |
570 | |
571 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
572 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
573 | return 1; | |
574 | } | |
aff063e2 JK |
575 | return 0; |
576 | } | |
577 | ||
578 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
579 | { | |
580 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
581 | int i; | |
582 | ||
583 | sbi->log_sectors_per_block = | |
584 | le32_to_cpu(raw_super->log_sectors_per_block); | |
585 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
586 | sbi->blocksize = 1 << sbi->log_blocksize; | |
587 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
588 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
589 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
590 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
591 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
592 | sbi->total_node_count = | |
593 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
594 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
595 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
596 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
597 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 598 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
599 | |
600 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
601 | atomic_set(&sbi->nr_pages[i], 0); | |
602 | } | |
603 | ||
14d7e9de | 604 | static int validate_superblock(struct super_block *sb, |
605 | struct f2fs_super_block **raw_super, | |
606 | struct buffer_head **raw_super_buf, sector_t block) | |
607 | { | |
608 | const char *super = (block == 0 ? "first" : "second"); | |
609 | ||
610 | /* read f2fs raw super block */ | |
611 | *raw_super_buf = sb_bread(sb, block); | |
612 | if (!*raw_super_buf) { | |
613 | f2fs_msg(sb, KERN_ERR, "unable to read %s superblock", | |
614 | super); | |
c0d39e65 | 615 | return -EIO; |
14d7e9de | 616 | } |
617 | ||
618 | *raw_super = (struct f2fs_super_block *) | |
619 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
620 | ||
621 | /* sanity checking of raw super */ | |
622 | if (!sanity_check_raw_super(sb, *raw_super)) | |
623 | return 0; | |
624 | ||
625 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
626 | "in %s superblock", super); | |
c0d39e65 | 627 | return -EINVAL; |
14d7e9de | 628 | } |
629 | ||
aff063e2 JK |
630 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
631 | { | |
632 | struct f2fs_sb_info *sbi; | |
633 | struct f2fs_super_block *raw_super; | |
634 | struct buffer_head *raw_super_buf; | |
635 | struct inode *root; | |
636 | long err = -EINVAL; | |
637 | int i; | |
638 | ||
639 | /* allocate memory for f2fs-specific super block info */ | |
640 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
641 | if (!sbi) | |
642 | return -ENOMEM; | |
643 | ||
ff9234ad | 644 | /* set a block size */ |
a07ef784 NJ |
645 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
646 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 647 | goto free_sbi; |
a07ef784 | 648 | } |
aff063e2 | 649 | |
c0d39e65 NJ |
650 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 0); |
651 | if (err) { | |
14d7e9de | 652 | brelse(raw_super_buf); |
c0d39e65 NJ |
653 | /* check secondary superblock when primary failed */ |
654 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 1); | |
655 | if (err) | |
14d7e9de | 656 | goto free_sb_buf; |
aff063e2 | 657 | } |
5fb08372 | 658 | sb->s_fs_info = sbi; |
aff063e2 JK |
659 | /* init some FS parameters */ |
660 | sbi->active_logs = NR_CURSEG_TYPE; | |
661 | ||
662 | set_opt(sbi, BG_GC); | |
663 | ||
664 | #ifdef CONFIG_F2FS_FS_XATTR | |
665 | set_opt(sbi, XATTR_USER); | |
666 | #endif | |
667 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
668 | set_opt(sbi, POSIX_ACL); | |
669 | #endif | |
670 | /* parse mount options */ | |
5fb08372 | 671 | err = parse_options(sb, (char *)data); |
66348b72 | 672 | if (err) |
aff063e2 JK |
673 | goto free_sb_buf; |
674 | ||
25ca923b | 675 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
676 | sb->s_max_links = F2FS_LINK_MAX; |
677 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
678 | ||
679 | sb->s_op = &f2fs_sops; | |
680 | sb->s_xattr = f2fs_xattr_handlers; | |
681 | sb->s_export_op = &f2fs_export_ops; | |
682 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
683 | sb->s_time_gran = 1; |
684 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
685 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
686 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
687 | ||
688 | /* init f2fs-specific super block info */ | |
689 | sbi->sb = sb; | |
690 | sbi->raw_super = raw_super; | |
691 | sbi->raw_super_buf = raw_super_buf; | |
692 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
693 | mutex_init(&sbi->writepages); |
694 | mutex_init(&sbi->cp_mutex); | |
39936837 | 695 | for (i = 0; i < NR_GLOBAL_LOCKS; i++) |
aff063e2 | 696 | mutex_init(&sbi->fs_lock[i]); |
39936837 | 697 | mutex_init(&sbi->node_write); |
aff063e2 JK |
698 | sbi->por_doing = 0; |
699 | spin_lock_init(&sbi->stat_lock); | |
700 | init_rwsem(&sbi->bio_sem); | |
701 | init_sb_info(sbi); | |
702 | ||
703 | /* get an inode for meta space */ | |
704 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
705 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 706 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
707 | err = PTR_ERR(sbi->meta_inode); |
708 | goto free_sb_buf; | |
709 | } | |
710 | ||
711 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
712 | if (err) { |
713 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 714 | goto free_meta_inode; |
a07ef784 | 715 | } |
aff063e2 JK |
716 | |
717 | /* sanity checking of checkpoint */ | |
718 | err = -EINVAL; | |
577e3495 | 719 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 720 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 721 | goto free_cp; |
a07ef784 | 722 | } |
aff063e2 JK |
723 | |
724 | sbi->total_valid_node_count = | |
725 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
726 | sbi->total_valid_inode_count = | |
727 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
728 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
729 | sbi->total_valid_block_count = | |
730 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
731 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
732 | sbi->alloc_valid_block_count = 0; | |
733 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
734 | spin_lock_init(&sbi->dir_inode_lock); | |
735 | ||
aff063e2 JK |
736 | init_orphan_info(sbi); |
737 | ||
738 | /* setup f2fs internal modules */ | |
739 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
740 | if (err) { |
741 | f2fs_msg(sb, KERN_ERR, | |
742 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 743 | goto free_sm; |
a07ef784 | 744 | } |
aff063e2 | 745 | err = build_node_manager(sbi); |
a07ef784 NJ |
746 | if (err) { |
747 | f2fs_msg(sb, KERN_ERR, | |
748 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 749 | goto free_nm; |
a07ef784 | 750 | } |
aff063e2 JK |
751 | |
752 | build_gc_manager(sbi); | |
753 | ||
754 | /* get an inode for node space */ | |
755 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
756 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 757 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
758 | err = PTR_ERR(sbi->node_inode); |
759 | goto free_nm; | |
760 | } | |
761 | ||
762 | /* if there are nt orphan nodes free them */ | |
763 | err = -EINVAL; | |
30f0c758 | 764 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
765 | goto free_node_inode; |
766 | ||
767 | /* read root inode and dentry */ | |
768 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
769 | if (IS_ERR(root)) { | |
a07ef784 | 770 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
771 | err = PTR_ERR(root); |
772 | goto free_node_inode; | |
773 | } | |
774 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
775 | goto free_root_inode; | |
776 | ||
777 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
778 | if (!sb->s_root) { | |
779 | err = -ENOMEM; | |
780 | goto free_root_inode; | |
781 | } | |
782 | ||
783 | /* recover fsynced data */ | |
6ead1142 JK |
784 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
785 | err = recover_fsync_data(sbi); | |
bde582b2 CF |
786 | if (err) |
787 | f2fs_msg(sb, KERN_ERR, | |
788 | "Cannot recover all fsync data errno=%ld", err); | |
6ead1142 | 789 | } |
aff063e2 | 790 | |
696c018c NJ |
791 | /* |
792 | * If filesystem is not mounted as read-only then | |
793 | * do start the gc_thread. | |
794 | */ | |
795 | if (!(sb->s_flags & MS_RDONLY)) { | |
796 | /* After POR, we can run background GC thread.*/ | |
797 | err = start_gc_thread(sbi); | |
798 | if (err) | |
799 | goto fail; | |
800 | } | |
aff063e2 JK |
801 | |
802 | err = f2fs_build_stats(sbi); | |
803 | if (err) | |
804 | goto fail; | |
805 | ||
5e176d54 JK |
806 | if (f2fs_proc_root) |
807 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
808 | ||
809 | if (sbi->s_proc) | |
810 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
811 | &f2fs_seq_segment_info_fops, sb); | |
812 | ||
d3ee456d NJ |
813 | if (test_opt(sbi, DISCARD)) { |
814 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
815 | if (!blk_queue_discard(q)) | |
816 | f2fs_msg(sb, KERN_WARNING, | |
817 | "mounting with \"discard\" option, but " | |
818 | "the device does not support discard"); | |
819 | } | |
820 | ||
aff063e2 JK |
821 | return 0; |
822 | fail: | |
823 | stop_gc_thread(sbi); | |
824 | free_root_inode: | |
825 | dput(sb->s_root); | |
826 | sb->s_root = NULL; | |
827 | free_node_inode: | |
828 | iput(sbi->node_inode); | |
829 | free_nm: | |
830 | destroy_node_manager(sbi); | |
831 | free_sm: | |
832 | destroy_segment_manager(sbi); | |
833 | free_cp: | |
834 | kfree(sbi->ckpt); | |
835 | free_meta_inode: | |
836 | make_bad_inode(sbi->meta_inode); | |
837 | iput(sbi->meta_inode); | |
838 | free_sb_buf: | |
839 | brelse(raw_super_buf); | |
840 | free_sbi: | |
841 | kfree(sbi); | |
842 | return err; | |
843 | } | |
844 | ||
845 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
846 | const char *dev_name, void *data) | |
847 | { | |
848 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
849 | } | |
850 | ||
851 | static struct file_system_type f2fs_fs_type = { | |
852 | .owner = THIS_MODULE, | |
853 | .name = "f2fs", | |
854 | .mount = f2fs_mount, | |
855 | .kill_sb = kill_block_super, | |
856 | .fs_flags = FS_REQUIRES_DEV, | |
857 | }; | |
7f78e035 | 858 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 859 | |
6e6093a8 | 860 | static int __init init_inodecache(void) |
aff063e2 JK |
861 | { |
862 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
863 | sizeof(struct f2fs_inode_info), NULL); | |
864 | if (f2fs_inode_cachep == NULL) | |
865 | return -ENOMEM; | |
866 | return 0; | |
867 | } | |
868 | ||
869 | static void destroy_inodecache(void) | |
870 | { | |
871 | /* | |
872 | * Make sure all delayed rcu free inodes are flushed before we | |
873 | * destroy cache. | |
874 | */ | |
875 | rcu_barrier(); | |
876 | kmem_cache_destroy(f2fs_inode_cachep); | |
877 | } | |
878 | ||
879 | static int __init init_f2fs_fs(void) | |
880 | { | |
881 | int err; | |
882 | ||
883 | err = init_inodecache(); | |
884 | if (err) | |
885 | goto fail; | |
886 | err = create_node_manager_caches(); | |
887 | if (err) | |
888 | goto fail; | |
889 | err = create_gc_caches(); | |
890 | if (err) | |
891 | goto fail; | |
892 | err = create_checkpoint_caches(); | |
893 | if (err) | |
894 | goto fail; | |
4589d25d NJ |
895 | err = register_filesystem(&f2fs_fs_type); |
896 | if (err) | |
897 | goto fail; | |
898 | f2fs_create_root_stats(); | |
5e176d54 | 899 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
aff063e2 JK |
900 | fail: |
901 | return err; | |
902 | } | |
903 | ||
904 | static void __exit exit_f2fs_fs(void) | |
905 | { | |
5e176d54 | 906 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 907 | f2fs_destroy_root_stats(); |
aff063e2 JK |
908 | unregister_filesystem(&f2fs_fs_type); |
909 | destroy_checkpoint_caches(); | |
910 | destroy_gc_caches(); | |
911 | destroy_node_manager_caches(); | |
912 | destroy_inodecache(); | |
913 | } | |
914 | ||
915 | module_init(init_f2fs_fs) | |
916 | module_exit(exit_f2fs_fs) | |
917 | ||
918 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
919 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
920 | MODULE_LICENSE("GPL"); |