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Commit | Line | Data |
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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> | |
15 | #include <linux/proc_fs.h> | |
16 | #include <linux/buffer_head.h> | |
17 | #include <linux/backing-dev.h> | |
18 | #include <linux/kthread.h> | |
19 | #include <linux/parser.h> | |
20 | #include <linux/mount.h> | |
21 | #include <linux/seq_file.h> | |
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" | |
29 | #include "xattr.h" | |
30 | ||
31 | static struct kmem_cache *f2fs_inode_cachep; | |
32 | ||
33 | enum { | |
34 | Opt_gc_background_off, | |
35 | Opt_disable_roll_forward, | |
36 | Opt_discard, | |
37 | Opt_noheap, | |
38 | Opt_nouser_xattr, | |
39 | Opt_noacl, | |
40 | Opt_active_logs, | |
41 | Opt_disable_ext_identify, | |
42 | Opt_err, | |
43 | }; | |
44 | ||
45 | static match_table_t f2fs_tokens = { | |
46 | {Opt_gc_background_off, "background_gc_off"}, | |
47 | {Opt_disable_roll_forward, "disable_roll_forward"}, | |
48 | {Opt_discard, "discard"}, | |
49 | {Opt_noheap, "no_heap"}, | |
50 | {Opt_nouser_xattr, "nouser_xattr"}, | |
51 | {Opt_noacl, "noacl"}, | |
52 | {Opt_active_logs, "active_logs=%u"}, | |
53 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
54 | {Opt_err, NULL}, | |
55 | }; | |
56 | ||
a07ef784 NJ |
57 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
58 | { | |
59 | struct va_format vaf; | |
60 | va_list args; | |
61 | ||
62 | va_start(args, fmt); | |
63 | vaf.fmt = fmt; | |
64 | vaf.va = &args; | |
65 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
66 | va_end(args); | |
67 | } | |
68 | ||
aff063e2 JK |
69 | static void init_once(void *foo) |
70 | { | |
71 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
72 | ||
aff063e2 JK |
73 | inode_init_once(&fi->vfs_inode); |
74 | } | |
75 | ||
76 | static struct inode *f2fs_alloc_inode(struct super_block *sb) | |
77 | { | |
78 | struct f2fs_inode_info *fi; | |
79 | ||
80 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
81 | if (!fi) | |
82 | return NULL; | |
83 | ||
84 | init_once((void *) fi); | |
85 | ||
111d2495 | 86 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
87 | fi->vfs_inode.i_version = 1; |
88 | atomic_set(&fi->dirty_dents, 0); | |
89 | fi->i_current_depth = 1; | |
90 | fi->i_advise = 0; | |
91 | rwlock_init(&fi->ext.ext_lock); | |
92 | ||
93 | set_inode_flag(fi, FI_NEW_INODE); | |
94 | ||
95 | return &fi->vfs_inode; | |
96 | } | |
97 | ||
98 | static void f2fs_i_callback(struct rcu_head *head) | |
99 | { | |
100 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
101 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
102 | } | |
103 | ||
25ca923b | 104 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
105 | { |
106 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
107 | } | |
108 | ||
109 | static void f2fs_put_super(struct super_block *sb) | |
110 | { | |
111 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
112 | ||
113 | f2fs_destroy_stats(sbi); | |
114 | stop_gc_thread(sbi); | |
115 | ||
43727527 | 116 | write_checkpoint(sbi, true); |
aff063e2 JK |
117 | |
118 | iput(sbi->node_inode); | |
119 | iput(sbi->meta_inode); | |
120 | ||
121 | /* destroy f2fs internal modules */ | |
122 | destroy_node_manager(sbi); | |
123 | destroy_segment_manager(sbi); | |
124 | ||
125 | kfree(sbi->ckpt); | |
126 | ||
127 | sb->s_fs_info = NULL; | |
128 | brelse(sbi->raw_super_buf); | |
129 | kfree(sbi); | |
130 | } | |
131 | ||
132 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
133 | { | |
134 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 JK |
135 | |
136 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) | |
137 | return 0; | |
138 | ||
139 | if (sync) | |
43727527 | 140 | write_checkpoint(sbi, false); |
7d82db83 JK |
141 | else |
142 | f2fs_balance_fs(sbi); | |
aff063e2 | 143 | |
64c576fe | 144 | return 0; |
aff063e2 JK |
145 | } |
146 | ||
d6212a5f CL |
147 | static int f2fs_freeze(struct super_block *sb) |
148 | { | |
149 | int err; | |
150 | ||
151 | if (sb->s_flags & MS_RDONLY) | |
152 | return 0; | |
153 | ||
154 | err = f2fs_sync_fs(sb, 1); | |
155 | return err; | |
156 | } | |
157 | ||
158 | static int f2fs_unfreeze(struct super_block *sb) | |
159 | { | |
160 | return 0; | |
161 | } | |
162 | ||
aff063e2 JK |
163 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
164 | { | |
165 | struct super_block *sb = dentry->d_sb; | |
166 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
167 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
168 | block_t total_count, user_block_count, start_count, ovp_count; | |
169 | ||
170 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
171 | user_block_count = sbi->user_block_count; | |
172 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
173 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
174 | buf->f_type = F2FS_SUPER_MAGIC; | |
175 | buf->f_bsize = sbi->blocksize; | |
176 | ||
177 | buf->f_blocks = total_count - start_count; | |
178 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
179 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
180 | ||
1362b5e3 JK |
181 | buf->f_files = sbi->total_node_count; |
182 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 183 | |
5a20d339 | 184 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
185 | buf->f_fsid.val[0] = (u32)id; |
186 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
192 | { | |
193 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
194 | ||
195 | if (test_opt(sbi, BG_GC)) | |
196 | seq_puts(seq, ",background_gc_on"); | |
197 | else | |
198 | seq_puts(seq, ",background_gc_off"); | |
199 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) | |
200 | seq_puts(seq, ",disable_roll_forward"); | |
201 | if (test_opt(sbi, DISCARD)) | |
202 | seq_puts(seq, ",discard"); | |
203 | if (test_opt(sbi, NOHEAP)) | |
204 | seq_puts(seq, ",no_heap_alloc"); | |
205 | #ifdef CONFIG_F2FS_FS_XATTR | |
206 | if (test_opt(sbi, XATTR_USER)) | |
207 | seq_puts(seq, ",user_xattr"); | |
208 | else | |
209 | seq_puts(seq, ",nouser_xattr"); | |
210 | #endif | |
211 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
212 | if (test_opt(sbi, POSIX_ACL)) | |
213 | seq_puts(seq, ",acl"); | |
214 | else | |
215 | seq_puts(seq, ",noacl"); | |
216 | #endif | |
217 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 218 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
219 | |
220 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static struct super_operations f2fs_sops = { | |
226 | .alloc_inode = f2fs_alloc_inode, | |
227 | .destroy_inode = f2fs_destroy_inode, | |
228 | .write_inode = f2fs_write_inode, | |
229 | .show_options = f2fs_show_options, | |
230 | .evict_inode = f2fs_evict_inode, | |
231 | .put_super = f2fs_put_super, | |
232 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
233 | .freeze_fs = f2fs_freeze, |
234 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 JK |
235 | .statfs = f2fs_statfs, |
236 | }; | |
237 | ||
238 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
239 | u64 ino, u32 generation) | |
240 | { | |
241 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
242 | struct inode *inode; | |
243 | ||
244 | if (ino < F2FS_ROOT_INO(sbi)) | |
245 | return ERR_PTR(-ESTALE); | |
246 | ||
247 | /* | |
248 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
249 | * However f2fs_iget currently does appropriate checks to handle stale | |
250 | * inodes so everything is OK. | |
251 | */ | |
252 | inode = f2fs_iget(sb, ino); | |
253 | if (IS_ERR(inode)) | |
254 | return ERR_CAST(inode); | |
255 | if (generation && inode->i_generation != generation) { | |
256 | /* we didn't find the right inode.. */ | |
257 | iput(inode); | |
258 | return ERR_PTR(-ESTALE); | |
259 | } | |
260 | return inode; | |
261 | } | |
262 | ||
263 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
264 | int fh_len, int fh_type) | |
265 | { | |
266 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
267 | f2fs_nfs_get_inode); | |
268 | } | |
269 | ||
270 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
271 | int fh_len, int fh_type) | |
272 | { | |
273 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
274 | f2fs_nfs_get_inode); | |
275 | } | |
276 | ||
277 | static const struct export_operations f2fs_export_ops = { | |
278 | .fh_to_dentry = f2fs_fh_to_dentry, | |
279 | .fh_to_parent = f2fs_fh_to_parent, | |
280 | .get_parent = f2fs_get_parent, | |
281 | }; | |
282 | ||
a07ef784 NJ |
283 | static int parse_options(struct super_block *sb, struct f2fs_sb_info *sbi, |
284 | char *options) | |
aff063e2 JK |
285 | { |
286 | substring_t args[MAX_OPT_ARGS]; | |
287 | char *p; | |
288 | int arg = 0; | |
289 | ||
290 | if (!options) | |
291 | return 0; | |
292 | ||
293 | while ((p = strsep(&options, ",")) != NULL) { | |
294 | int token; | |
295 | if (!*p) | |
296 | continue; | |
297 | /* | |
298 | * Initialize args struct so we know whether arg was | |
299 | * found; some options take optional arguments. | |
300 | */ | |
301 | args[0].to = args[0].from = NULL; | |
302 | token = match_token(p, f2fs_tokens, args); | |
303 | ||
304 | switch (token) { | |
305 | case Opt_gc_background_off: | |
306 | clear_opt(sbi, BG_GC); | |
307 | break; | |
308 | case Opt_disable_roll_forward: | |
309 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
310 | break; | |
311 | case Opt_discard: | |
312 | set_opt(sbi, DISCARD); | |
313 | break; | |
314 | case Opt_noheap: | |
315 | set_opt(sbi, NOHEAP); | |
316 | break; | |
317 | #ifdef CONFIG_F2FS_FS_XATTR | |
318 | case Opt_nouser_xattr: | |
319 | clear_opt(sbi, XATTR_USER); | |
320 | break; | |
321 | #else | |
322 | case Opt_nouser_xattr: | |
a07ef784 NJ |
323 | f2fs_msg(sb, KERN_INFO, |
324 | "nouser_xattr options not supported"); | |
aff063e2 JK |
325 | break; |
326 | #endif | |
327 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
328 | case Opt_noacl: | |
329 | clear_opt(sbi, POSIX_ACL); | |
330 | break; | |
331 | #else | |
332 | case Opt_noacl: | |
a07ef784 | 333 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); |
aff063e2 JK |
334 | break; |
335 | #endif | |
336 | case Opt_active_logs: | |
337 | if (args->from && match_int(args, &arg)) | |
338 | return -EINVAL; | |
12a67146 | 339 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) |
aff063e2 JK |
340 | return -EINVAL; |
341 | sbi->active_logs = arg; | |
342 | break; | |
343 | case Opt_disable_ext_identify: | |
344 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
345 | break; | |
346 | default: | |
a07ef784 NJ |
347 | f2fs_msg(sb, KERN_ERR, |
348 | "Unrecognized mount option \"%s\" or missing value", | |
349 | p); | |
aff063e2 JK |
350 | return -EINVAL; |
351 | } | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static loff_t max_file_size(unsigned bits) | |
357 | { | |
358 | loff_t result = ADDRS_PER_INODE; | |
359 | loff_t leaf_count = ADDRS_PER_BLOCK; | |
360 | ||
361 | /* two direct node blocks */ | |
362 | result += (leaf_count * 2); | |
363 | ||
364 | /* two indirect node blocks */ | |
365 | leaf_count *= NIDS_PER_BLOCK; | |
366 | result += (leaf_count * 2); | |
367 | ||
368 | /* one double indirect node block */ | |
369 | leaf_count *= NIDS_PER_BLOCK; | |
370 | result += leaf_count; | |
371 | ||
372 | result <<= bits; | |
373 | return result; | |
374 | } | |
375 | ||
a07ef784 NJ |
376 | static int sanity_check_raw_super(struct super_block *sb, |
377 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
378 | { |
379 | unsigned int blocksize; | |
380 | ||
a07ef784 NJ |
381 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
382 | f2fs_msg(sb, KERN_INFO, | |
383 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
384 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 385 | return 1; |
a07ef784 | 386 | } |
aff063e2 | 387 | |
5c9b4692 | 388 | /* Currently, support only 4KB page cache size */ |
389 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
390 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 391 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 392 | PAGE_CACHE_SIZE); |
393 | return 1; | |
394 | } | |
395 | ||
aff063e2 JK |
396 | /* Currently, support only 4KB block size */ |
397 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 398 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
399 | f2fs_msg(sb, KERN_INFO, |
400 | "Invalid blocksize (%u), supports only 4KB\n", | |
401 | blocksize); | |
aff063e2 | 402 | return 1; |
a07ef784 | 403 | } |
5c9b4692 | 404 | |
aff063e2 | 405 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
406 | F2FS_LOG_SECTOR_SIZE) { |
407 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 408 | return 1; |
a07ef784 | 409 | } |
aff063e2 | 410 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
411 | F2FS_LOG_SECTORS_PER_BLOCK) { |
412 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 413 | return 1; |
a07ef784 | 414 | } |
aff063e2 JK |
415 | return 0; |
416 | } | |
417 | ||
577e3495 | 418 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
419 | { |
420 | unsigned int total, fsmeta; | |
577e3495 JK |
421 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
422 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
423 | |
424 | total = le32_to_cpu(raw_super->segment_count); | |
425 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
426 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
427 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
428 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
429 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
430 | ||
431 | if (fsmeta >= total) | |
432 | return 1; | |
577e3495 JK |
433 | |
434 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
435 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
436 | return 1; | |
437 | } | |
aff063e2 JK |
438 | return 0; |
439 | } | |
440 | ||
441 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
442 | { | |
443 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
444 | int i; | |
445 | ||
446 | sbi->log_sectors_per_block = | |
447 | le32_to_cpu(raw_super->log_sectors_per_block); | |
448 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
449 | sbi->blocksize = 1 << sbi->log_blocksize; | |
450 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
451 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
452 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
453 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
454 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
455 | sbi->total_node_count = | |
456 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
457 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
458 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
459 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
460 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
461 | ||
462 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
463 | atomic_set(&sbi->nr_pages[i], 0); | |
464 | } | |
465 | ||
14d7e9de | 466 | static int validate_superblock(struct super_block *sb, |
467 | struct f2fs_super_block **raw_super, | |
468 | struct buffer_head **raw_super_buf, sector_t block) | |
469 | { | |
470 | const char *super = (block == 0 ? "first" : "second"); | |
471 | ||
472 | /* read f2fs raw super block */ | |
473 | *raw_super_buf = sb_bread(sb, block); | |
474 | if (!*raw_super_buf) { | |
475 | f2fs_msg(sb, KERN_ERR, "unable to read %s superblock", | |
476 | super); | |
c0d39e65 | 477 | return -EIO; |
14d7e9de | 478 | } |
479 | ||
480 | *raw_super = (struct f2fs_super_block *) | |
481 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
482 | ||
483 | /* sanity checking of raw super */ | |
484 | if (!sanity_check_raw_super(sb, *raw_super)) | |
485 | return 0; | |
486 | ||
487 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
488 | "in %s superblock", super); | |
c0d39e65 | 489 | return -EINVAL; |
14d7e9de | 490 | } |
491 | ||
aff063e2 JK |
492 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
493 | { | |
494 | struct f2fs_sb_info *sbi; | |
495 | struct f2fs_super_block *raw_super; | |
496 | struct buffer_head *raw_super_buf; | |
497 | struct inode *root; | |
498 | long err = -EINVAL; | |
499 | int i; | |
500 | ||
501 | /* allocate memory for f2fs-specific super block info */ | |
502 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
503 | if (!sbi) | |
504 | return -ENOMEM; | |
505 | ||
ff9234ad | 506 | /* set a block size */ |
a07ef784 NJ |
507 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
508 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 509 | goto free_sbi; |
a07ef784 | 510 | } |
aff063e2 | 511 | |
c0d39e65 NJ |
512 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 0); |
513 | if (err) { | |
14d7e9de | 514 | brelse(raw_super_buf); |
c0d39e65 NJ |
515 | /* check secondary superblock when primary failed */ |
516 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 1); | |
517 | if (err) | |
14d7e9de | 518 | goto free_sb_buf; |
aff063e2 | 519 | } |
aff063e2 JK |
520 | /* init some FS parameters */ |
521 | sbi->active_logs = NR_CURSEG_TYPE; | |
522 | ||
523 | set_opt(sbi, BG_GC); | |
524 | ||
525 | #ifdef CONFIG_F2FS_FS_XATTR | |
526 | set_opt(sbi, XATTR_USER); | |
527 | #endif | |
528 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
529 | set_opt(sbi, POSIX_ACL); | |
530 | #endif | |
531 | /* parse mount options */ | |
a07ef784 | 532 | if (parse_options(sb, sbi, (char *)data)) |
aff063e2 JK |
533 | goto free_sb_buf; |
534 | ||
25ca923b | 535 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
536 | sb->s_max_links = F2FS_LINK_MAX; |
537 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
538 | ||
539 | sb->s_op = &f2fs_sops; | |
540 | sb->s_xattr = f2fs_xattr_handlers; | |
541 | sb->s_export_op = &f2fs_export_ops; | |
542 | sb->s_magic = F2FS_SUPER_MAGIC; | |
543 | sb->s_fs_info = sbi; | |
544 | sb->s_time_gran = 1; | |
545 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
546 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
547 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
548 | ||
549 | /* init f2fs-specific super block info */ | |
550 | sbi->sb = sb; | |
551 | sbi->raw_super = raw_super; | |
552 | sbi->raw_super_buf = raw_super_buf; | |
553 | mutex_init(&sbi->gc_mutex); | |
554 | mutex_init(&sbi->write_inode); | |
555 | mutex_init(&sbi->writepages); | |
556 | mutex_init(&sbi->cp_mutex); | |
557 | for (i = 0; i < NR_LOCK_TYPE; i++) | |
558 | mutex_init(&sbi->fs_lock[i]); | |
559 | sbi->por_doing = 0; | |
560 | spin_lock_init(&sbi->stat_lock); | |
561 | init_rwsem(&sbi->bio_sem); | |
562 | init_sb_info(sbi); | |
563 | ||
564 | /* get an inode for meta space */ | |
565 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
566 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 567 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
568 | err = PTR_ERR(sbi->meta_inode); |
569 | goto free_sb_buf; | |
570 | } | |
571 | ||
572 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
573 | if (err) { |
574 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 575 | goto free_meta_inode; |
a07ef784 | 576 | } |
aff063e2 JK |
577 | |
578 | /* sanity checking of checkpoint */ | |
579 | err = -EINVAL; | |
577e3495 | 580 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 581 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 582 | goto free_cp; |
a07ef784 | 583 | } |
aff063e2 JK |
584 | |
585 | sbi->total_valid_node_count = | |
586 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
587 | sbi->total_valid_inode_count = | |
588 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
589 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
590 | sbi->total_valid_block_count = | |
591 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
592 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
593 | sbi->alloc_valid_block_count = 0; | |
594 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
595 | spin_lock_init(&sbi->dir_inode_lock); | |
596 | ||
aff063e2 JK |
597 | init_orphan_info(sbi); |
598 | ||
599 | /* setup f2fs internal modules */ | |
600 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
601 | if (err) { |
602 | f2fs_msg(sb, KERN_ERR, | |
603 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 604 | goto free_sm; |
a07ef784 | 605 | } |
aff063e2 | 606 | err = build_node_manager(sbi); |
a07ef784 NJ |
607 | if (err) { |
608 | f2fs_msg(sb, KERN_ERR, | |
609 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 610 | goto free_nm; |
a07ef784 | 611 | } |
aff063e2 JK |
612 | |
613 | build_gc_manager(sbi); | |
614 | ||
615 | /* get an inode for node space */ | |
616 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
617 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 618 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
619 | err = PTR_ERR(sbi->node_inode); |
620 | goto free_nm; | |
621 | } | |
622 | ||
623 | /* if there are nt orphan nodes free them */ | |
624 | err = -EINVAL; | |
30f0c758 | 625 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
626 | goto free_node_inode; |
627 | ||
628 | /* read root inode and dentry */ | |
629 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
630 | if (IS_ERR(root)) { | |
a07ef784 | 631 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
632 | err = PTR_ERR(root); |
633 | goto free_node_inode; | |
634 | } | |
635 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
636 | goto free_root_inode; | |
637 | ||
638 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
639 | if (!sb->s_root) { | |
640 | err = -ENOMEM; | |
641 | goto free_root_inode; | |
642 | } | |
643 | ||
644 | /* recover fsynced data */ | |
30f0c758 | 645 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) |
aff063e2 JK |
646 | recover_fsync_data(sbi); |
647 | ||
648 | /* After POR, we can run background GC thread */ | |
649 | err = start_gc_thread(sbi); | |
650 | if (err) | |
651 | goto fail; | |
652 | ||
653 | err = f2fs_build_stats(sbi); | |
654 | if (err) | |
655 | goto fail; | |
656 | ||
d3ee456d NJ |
657 | if (test_opt(sbi, DISCARD)) { |
658 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
659 | if (!blk_queue_discard(q)) | |
660 | f2fs_msg(sb, KERN_WARNING, | |
661 | "mounting with \"discard\" option, but " | |
662 | "the device does not support discard"); | |
663 | } | |
664 | ||
aff063e2 JK |
665 | return 0; |
666 | fail: | |
667 | stop_gc_thread(sbi); | |
668 | free_root_inode: | |
669 | dput(sb->s_root); | |
670 | sb->s_root = NULL; | |
671 | free_node_inode: | |
672 | iput(sbi->node_inode); | |
673 | free_nm: | |
674 | destroy_node_manager(sbi); | |
675 | free_sm: | |
676 | destroy_segment_manager(sbi); | |
677 | free_cp: | |
678 | kfree(sbi->ckpt); | |
679 | free_meta_inode: | |
680 | make_bad_inode(sbi->meta_inode); | |
681 | iput(sbi->meta_inode); | |
682 | free_sb_buf: | |
683 | brelse(raw_super_buf); | |
684 | free_sbi: | |
685 | kfree(sbi); | |
686 | return err; | |
687 | } | |
688 | ||
689 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
690 | const char *dev_name, void *data) | |
691 | { | |
692 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
693 | } | |
694 | ||
695 | static struct file_system_type f2fs_fs_type = { | |
696 | .owner = THIS_MODULE, | |
697 | .name = "f2fs", | |
698 | .mount = f2fs_mount, | |
699 | .kill_sb = kill_block_super, | |
700 | .fs_flags = FS_REQUIRES_DEV, | |
701 | }; | |
702 | ||
6e6093a8 | 703 | static int __init init_inodecache(void) |
aff063e2 JK |
704 | { |
705 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
706 | sizeof(struct f2fs_inode_info), NULL); | |
707 | if (f2fs_inode_cachep == NULL) | |
708 | return -ENOMEM; | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static void destroy_inodecache(void) | |
713 | { | |
714 | /* | |
715 | * Make sure all delayed rcu free inodes are flushed before we | |
716 | * destroy cache. | |
717 | */ | |
718 | rcu_barrier(); | |
719 | kmem_cache_destroy(f2fs_inode_cachep); | |
720 | } | |
721 | ||
722 | static int __init init_f2fs_fs(void) | |
723 | { | |
724 | int err; | |
725 | ||
726 | err = init_inodecache(); | |
727 | if (err) | |
728 | goto fail; | |
729 | err = create_node_manager_caches(); | |
730 | if (err) | |
731 | goto fail; | |
732 | err = create_gc_caches(); | |
733 | if (err) | |
734 | goto fail; | |
735 | err = create_checkpoint_caches(); | |
736 | if (err) | |
737 | goto fail; | |
4589d25d NJ |
738 | err = register_filesystem(&f2fs_fs_type); |
739 | if (err) | |
740 | goto fail; | |
741 | f2fs_create_root_stats(); | |
aff063e2 JK |
742 | fail: |
743 | return err; | |
744 | } | |
745 | ||
746 | static void __exit exit_f2fs_fs(void) | |
747 | { | |
4589d25d | 748 | f2fs_destroy_root_stats(); |
aff063e2 JK |
749 | unregister_filesystem(&f2fs_fs_type); |
750 | destroy_checkpoint_caches(); | |
751 | destroy_gc_caches(); | |
752 | destroy_node_manager_caches(); | |
753 | destroy_inodecache(); | |
754 | } | |
755 | ||
756 | module_init(init_f2fs_fs) | |
757 | module_exit(exit_f2fs_fs) | |
758 | ||
759 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
760 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
761 | MODULE_LICENSE("GPL"); |