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> | |
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" | |
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 | ||
aff063e2 JK |
35 | static struct kmem_cache *f2fs_inode_cachep; |
36 | ||
37 | enum { | |
38 | Opt_gc_background_off, | |
39 | Opt_disable_roll_forward, | |
40 | Opt_discard, | |
41 | Opt_noheap, | |
42 | Opt_nouser_xattr, | |
43 | Opt_noacl, | |
44 | Opt_active_logs, | |
45 | Opt_disable_ext_identify, | |
46 | Opt_err, | |
47 | }; | |
48 | ||
49 | static match_table_t f2fs_tokens = { | |
50 | {Opt_gc_background_off, "background_gc_off"}, | |
51 | {Opt_disable_roll_forward, "disable_roll_forward"}, | |
52 | {Opt_discard, "discard"}, | |
53 | {Opt_noheap, "no_heap"}, | |
54 | {Opt_nouser_xattr, "nouser_xattr"}, | |
55 | {Opt_noacl, "noacl"}, | |
56 | {Opt_active_logs, "active_logs=%u"}, | |
57 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
58 | {Opt_err, NULL}, | |
59 | }; | |
60 | ||
a07ef784 NJ |
61 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
62 | { | |
63 | struct va_format vaf; | |
64 | va_list args; | |
65 | ||
66 | va_start(args, fmt); | |
67 | vaf.fmt = fmt; | |
68 | vaf.va = &args; | |
69 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
70 | va_end(args); | |
71 | } | |
72 | ||
aff063e2 JK |
73 | static void init_once(void *foo) |
74 | { | |
75 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
76 | ||
aff063e2 JK |
77 | inode_init_once(&fi->vfs_inode); |
78 | } | |
79 | ||
80 | static struct inode *f2fs_alloc_inode(struct super_block *sb) | |
81 | { | |
82 | struct f2fs_inode_info *fi; | |
83 | ||
84 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
85 | if (!fi) | |
86 | return NULL; | |
87 | ||
88 | init_once((void *) fi); | |
89 | ||
111d2495 | 90 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
91 | fi->vfs_inode.i_version = 1; |
92 | atomic_set(&fi->dirty_dents, 0); | |
93 | fi->i_current_depth = 1; | |
94 | fi->i_advise = 0; | |
95 | rwlock_init(&fi->ext.ext_lock); | |
96 | ||
97 | set_inode_flag(fi, FI_NEW_INODE); | |
98 | ||
99 | return &fi->vfs_inode; | |
100 | } | |
101 | ||
102 | static void f2fs_i_callback(struct rcu_head *head) | |
103 | { | |
104 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
105 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
106 | } | |
107 | ||
25ca923b | 108 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
109 | { |
110 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
111 | } | |
112 | ||
113 | static void f2fs_put_super(struct super_block *sb) | |
114 | { | |
115 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
116 | ||
117 | f2fs_destroy_stats(sbi); | |
118 | stop_gc_thread(sbi); | |
119 | ||
43727527 | 120 | write_checkpoint(sbi, true); |
aff063e2 JK |
121 | |
122 | iput(sbi->node_inode); | |
123 | iput(sbi->meta_inode); | |
124 | ||
125 | /* destroy f2fs internal modules */ | |
126 | destroy_node_manager(sbi); | |
127 | destroy_segment_manager(sbi); | |
128 | ||
129 | kfree(sbi->ckpt); | |
130 | ||
131 | sb->s_fs_info = NULL; | |
132 | brelse(sbi->raw_super_buf); | |
133 | kfree(sbi); | |
134 | } | |
135 | ||
136 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
137 | { | |
138 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 139 | |
a2a4a7e4 NJ |
140 | trace_f2fs_sync_fs(sb, sync); |
141 | ||
aff063e2 JK |
142 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
143 | return 0; | |
144 | ||
b7473754 JK |
145 | if (sync) { |
146 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 147 | write_checkpoint(sbi, false); |
b7473754 JK |
148 | mutex_unlock(&sbi->gc_mutex); |
149 | } else { | |
7d82db83 | 150 | f2fs_balance_fs(sbi); |
b7473754 | 151 | } |
aff063e2 | 152 | |
64c576fe | 153 | return 0; |
aff063e2 JK |
154 | } |
155 | ||
d6212a5f CL |
156 | static int f2fs_freeze(struct super_block *sb) |
157 | { | |
158 | int err; | |
159 | ||
160 | if (sb->s_flags & MS_RDONLY) | |
161 | return 0; | |
162 | ||
163 | err = f2fs_sync_fs(sb, 1); | |
164 | return err; | |
165 | } | |
166 | ||
167 | static int f2fs_unfreeze(struct super_block *sb) | |
168 | { | |
169 | return 0; | |
170 | } | |
171 | ||
aff063e2 JK |
172 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
173 | { | |
174 | struct super_block *sb = dentry->d_sb; | |
175 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
176 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
177 | block_t total_count, user_block_count, start_count, ovp_count; | |
178 | ||
179 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
180 | user_block_count = sbi->user_block_count; | |
181 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
182 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
183 | buf->f_type = F2FS_SUPER_MAGIC; | |
184 | buf->f_bsize = sbi->blocksize; | |
185 | ||
186 | buf->f_blocks = total_count - start_count; | |
187 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
188 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
189 | ||
1362b5e3 JK |
190 | buf->f_files = sbi->total_node_count; |
191 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 192 | |
5a20d339 | 193 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
194 | buf->f_fsid.val[0] = (u32)id; |
195 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
201 | { | |
202 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
203 | ||
204 | if (test_opt(sbi, BG_GC)) | |
205 | seq_puts(seq, ",background_gc_on"); | |
206 | else | |
207 | seq_puts(seq, ",background_gc_off"); | |
208 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) | |
209 | seq_puts(seq, ",disable_roll_forward"); | |
210 | if (test_opt(sbi, DISCARD)) | |
211 | seq_puts(seq, ",discard"); | |
212 | if (test_opt(sbi, NOHEAP)) | |
213 | seq_puts(seq, ",no_heap_alloc"); | |
214 | #ifdef CONFIG_F2FS_FS_XATTR | |
215 | if (test_opt(sbi, XATTR_USER)) | |
216 | seq_puts(seq, ",user_xattr"); | |
217 | else | |
218 | seq_puts(seq, ",nouser_xattr"); | |
219 | #endif | |
220 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
221 | if (test_opt(sbi, POSIX_ACL)) | |
222 | seq_puts(seq, ",acl"); | |
223 | else | |
224 | seq_puts(seq, ",noacl"); | |
225 | #endif | |
226 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 227 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
228 | |
229 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static struct super_operations f2fs_sops = { | |
235 | .alloc_inode = f2fs_alloc_inode, | |
236 | .destroy_inode = f2fs_destroy_inode, | |
237 | .write_inode = f2fs_write_inode, | |
238 | .show_options = f2fs_show_options, | |
239 | .evict_inode = f2fs_evict_inode, | |
240 | .put_super = f2fs_put_super, | |
241 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
242 | .freeze_fs = f2fs_freeze, |
243 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 JK |
244 | .statfs = f2fs_statfs, |
245 | }; | |
246 | ||
247 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
248 | u64 ino, u32 generation) | |
249 | { | |
250 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
251 | struct inode *inode; | |
252 | ||
253 | if (ino < F2FS_ROOT_INO(sbi)) | |
254 | return ERR_PTR(-ESTALE); | |
255 | ||
256 | /* | |
257 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
258 | * However f2fs_iget currently does appropriate checks to handle stale | |
259 | * inodes so everything is OK. | |
260 | */ | |
261 | inode = f2fs_iget(sb, ino); | |
262 | if (IS_ERR(inode)) | |
263 | return ERR_CAST(inode); | |
264 | if (generation && inode->i_generation != generation) { | |
265 | /* we didn't find the right inode.. */ | |
266 | iput(inode); | |
267 | return ERR_PTR(-ESTALE); | |
268 | } | |
269 | return inode; | |
270 | } | |
271 | ||
272 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
273 | int fh_len, int fh_type) | |
274 | { | |
275 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
276 | f2fs_nfs_get_inode); | |
277 | } | |
278 | ||
279 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
280 | int fh_len, int fh_type) | |
281 | { | |
282 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
283 | f2fs_nfs_get_inode); | |
284 | } | |
285 | ||
286 | static const struct export_operations f2fs_export_ops = { | |
287 | .fh_to_dentry = f2fs_fh_to_dentry, | |
288 | .fh_to_parent = f2fs_fh_to_parent, | |
289 | .get_parent = f2fs_get_parent, | |
290 | }; | |
291 | ||
a07ef784 NJ |
292 | static int parse_options(struct super_block *sb, struct f2fs_sb_info *sbi, |
293 | char *options) | |
aff063e2 JK |
294 | { |
295 | substring_t args[MAX_OPT_ARGS]; | |
296 | char *p; | |
297 | int arg = 0; | |
298 | ||
299 | if (!options) | |
300 | return 0; | |
301 | ||
302 | while ((p = strsep(&options, ",")) != NULL) { | |
303 | int token; | |
304 | if (!*p) | |
305 | continue; | |
306 | /* | |
307 | * Initialize args struct so we know whether arg was | |
308 | * found; some options take optional arguments. | |
309 | */ | |
310 | args[0].to = args[0].from = NULL; | |
311 | token = match_token(p, f2fs_tokens, args); | |
312 | ||
313 | switch (token) { | |
314 | case Opt_gc_background_off: | |
315 | clear_opt(sbi, BG_GC); | |
316 | break; | |
317 | case Opt_disable_roll_forward: | |
318 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
319 | break; | |
320 | case Opt_discard: | |
321 | set_opt(sbi, DISCARD); | |
322 | break; | |
323 | case Opt_noheap: | |
324 | set_opt(sbi, NOHEAP); | |
325 | break; | |
326 | #ifdef CONFIG_F2FS_FS_XATTR | |
327 | case Opt_nouser_xattr: | |
328 | clear_opt(sbi, XATTR_USER); | |
329 | break; | |
330 | #else | |
331 | case Opt_nouser_xattr: | |
a07ef784 NJ |
332 | f2fs_msg(sb, KERN_INFO, |
333 | "nouser_xattr options not supported"); | |
aff063e2 JK |
334 | break; |
335 | #endif | |
336 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
337 | case Opt_noacl: | |
338 | clear_opt(sbi, POSIX_ACL); | |
339 | break; | |
340 | #else | |
341 | case Opt_noacl: | |
a07ef784 | 342 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); |
aff063e2 JK |
343 | break; |
344 | #endif | |
345 | case Opt_active_logs: | |
346 | if (args->from && match_int(args, &arg)) | |
347 | return -EINVAL; | |
12a67146 | 348 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) |
aff063e2 JK |
349 | return -EINVAL; |
350 | sbi->active_logs = arg; | |
351 | break; | |
352 | case Opt_disable_ext_identify: | |
353 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
354 | break; | |
355 | default: | |
a07ef784 NJ |
356 | f2fs_msg(sb, KERN_ERR, |
357 | "Unrecognized mount option \"%s\" or missing value", | |
358 | p); | |
aff063e2 JK |
359 | return -EINVAL; |
360 | } | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static loff_t max_file_size(unsigned bits) | |
366 | { | |
367 | loff_t result = ADDRS_PER_INODE; | |
368 | loff_t leaf_count = ADDRS_PER_BLOCK; | |
369 | ||
370 | /* two direct node blocks */ | |
371 | result += (leaf_count * 2); | |
372 | ||
373 | /* two indirect node blocks */ | |
374 | leaf_count *= NIDS_PER_BLOCK; | |
375 | result += (leaf_count * 2); | |
376 | ||
377 | /* one double indirect node block */ | |
378 | leaf_count *= NIDS_PER_BLOCK; | |
379 | result += leaf_count; | |
380 | ||
381 | result <<= bits; | |
382 | return result; | |
383 | } | |
384 | ||
a07ef784 NJ |
385 | static int sanity_check_raw_super(struct super_block *sb, |
386 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
387 | { |
388 | unsigned int blocksize; | |
389 | ||
a07ef784 NJ |
390 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
391 | f2fs_msg(sb, KERN_INFO, | |
392 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
393 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 394 | return 1; |
a07ef784 | 395 | } |
aff063e2 | 396 | |
5c9b4692 | 397 | /* Currently, support only 4KB page cache size */ |
398 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
399 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 400 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 401 | PAGE_CACHE_SIZE); |
402 | return 1; | |
403 | } | |
404 | ||
aff063e2 JK |
405 | /* Currently, support only 4KB block size */ |
406 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 407 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
408 | f2fs_msg(sb, KERN_INFO, |
409 | "Invalid blocksize (%u), supports only 4KB\n", | |
410 | blocksize); | |
aff063e2 | 411 | return 1; |
a07ef784 | 412 | } |
5c9b4692 | 413 | |
aff063e2 | 414 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
415 | F2FS_LOG_SECTOR_SIZE) { |
416 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 417 | return 1; |
a07ef784 | 418 | } |
aff063e2 | 419 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
420 | F2FS_LOG_SECTORS_PER_BLOCK) { |
421 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 422 | return 1; |
a07ef784 | 423 | } |
aff063e2 JK |
424 | return 0; |
425 | } | |
426 | ||
577e3495 | 427 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
428 | { |
429 | unsigned int total, fsmeta; | |
577e3495 JK |
430 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
431 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
432 | |
433 | total = le32_to_cpu(raw_super->segment_count); | |
434 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
435 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
436 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
437 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
438 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
439 | ||
440 | if (fsmeta >= total) | |
441 | return 1; | |
577e3495 JK |
442 | |
443 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
444 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
445 | return 1; | |
446 | } | |
aff063e2 JK |
447 | return 0; |
448 | } | |
449 | ||
450 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
451 | { | |
452 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
453 | int i; | |
454 | ||
455 | sbi->log_sectors_per_block = | |
456 | le32_to_cpu(raw_super->log_sectors_per_block); | |
457 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
458 | sbi->blocksize = 1 << sbi->log_blocksize; | |
459 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
460 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
461 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
462 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
463 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
464 | sbi->total_node_count = | |
465 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
466 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
467 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
468 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
469 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 470 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
471 | |
472 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
473 | atomic_set(&sbi->nr_pages[i], 0); | |
474 | } | |
475 | ||
14d7e9de | 476 | static int validate_superblock(struct super_block *sb, |
477 | struct f2fs_super_block **raw_super, | |
478 | struct buffer_head **raw_super_buf, sector_t block) | |
479 | { | |
480 | const char *super = (block == 0 ? "first" : "second"); | |
481 | ||
482 | /* read f2fs raw super block */ | |
483 | *raw_super_buf = sb_bread(sb, block); | |
484 | if (!*raw_super_buf) { | |
485 | f2fs_msg(sb, KERN_ERR, "unable to read %s superblock", | |
486 | super); | |
c0d39e65 | 487 | return -EIO; |
14d7e9de | 488 | } |
489 | ||
490 | *raw_super = (struct f2fs_super_block *) | |
491 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
492 | ||
493 | /* sanity checking of raw super */ | |
494 | if (!sanity_check_raw_super(sb, *raw_super)) | |
495 | return 0; | |
496 | ||
497 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
498 | "in %s superblock", super); | |
c0d39e65 | 499 | return -EINVAL; |
14d7e9de | 500 | } |
501 | ||
aff063e2 JK |
502 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
503 | { | |
504 | struct f2fs_sb_info *sbi; | |
505 | struct f2fs_super_block *raw_super; | |
506 | struct buffer_head *raw_super_buf; | |
507 | struct inode *root; | |
508 | long err = -EINVAL; | |
509 | int i; | |
510 | ||
511 | /* allocate memory for f2fs-specific super block info */ | |
512 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
513 | if (!sbi) | |
514 | return -ENOMEM; | |
515 | ||
ff9234ad | 516 | /* set a block size */ |
a07ef784 NJ |
517 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
518 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 519 | goto free_sbi; |
a07ef784 | 520 | } |
aff063e2 | 521 | |
c0d39e65 NJ |
522 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 0); |
523 | if (err) { | |
14d7e9de | 524 | brelse(raw_super_buf); |
c0d39e65 NJ |
525 | /* check secondary superblock when primary failed */ |
526 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 1); | |
527 | if (err) | |
14d7e9de | 528 | goto free_sb_buf; |
aff063e2 | 529 | } |
aff063e2 JK |
530 | /* init some FS parameters */ |
531 | sbi->active_logs = NR_CURSEG_TYPE; | |
532 | ||
533 | set_opt(sbi, BG_GC); | |
534 | ||
535 | #ifdef CONFIG_F2FS_FS_XATTR | |
536 | set_opt(sbi, XATTR_USER); | |
537 | #endif | |
538 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
539 | set_opt(sbi, POSIX_ACL); | |
540 | #endif | |
541 | /* parse mount options */ | |
66348b72 WY |
542 | err = parse_options(sb, sbi, (char *)data); |
543 | if (err) | |
aff063e2 JK |
544 | goto free_sb_buf; |
545 | ||
25ca923b | 546 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
547 | sb->s_max_links = F2FS_LINK_MAX; |
548 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
549 | ||
550 | sb->s_op = &f2fs_sops; | |
551 | sb->s_xattr = f2fs_xattr_handlers; | |
552 | sb->s_export_op = &f2fs_export_ops; | |
553 | sb->s_magic = F2FS_SUPER_MAGIC; | |
554 | sb->s_fs_info = sbi; | |
555 | sb->s_time_gran = 1; | |
556 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
557 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
558 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
559 | ||
560 | /* init f2fs-specific super block info */ | |
561 | sbi->sb = sb; | |
562 | sbi->raw_super = raw_super; | |
563 | sbi->raw_super_buf = raw_super_buf; | |
564 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
565 | mutex_init(&sbi->writepages); |
566 | mutex_init(&sbi->cp_mutex); | |
39936837 | 567 | for (i = 0; i < NR_GLOBAL_LOCKS; i++) |
aff063e2 | 568 | mutex_init(&sbi->fs_lock[i]); |
39936837 | 569 | mutex_init(&sbi->node_write); |
aff063e2 JK |
570 | sbi->por_doing = 0; |
571 | spin_lock_init(&sbi->stat_lock); | |
572 | init_rwsem(&sbi->bio_sem); | |
573 | init_sb_info(sbi); | |
574 | ||
575 | /* get an inode for meta space */ | |
576 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
577 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 578 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
579 | err = PTR_ERR(sbi->meta_inode); |
580 | goto free_sb_buf; | |
581 | } | |
582 | ||
583 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
584 | if (err) { |
585 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 586 | goto free_meta_inode; |
a07ef784 | 587 | } |
aff063e2 JK |
588 | |
589 | /* sanity checking of checkpoint */ | |
590 | err = -EINVAL; | |
577e3495 | 591 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 592 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 593 | goto free_cp; |
a07ef784 | 594 | } |
aff063e2 JK |
595 | |
596 | sbi->total_valid_node_count = | |
597 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
598 | sbi->total_valid_inode_count = | |
599 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
600 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
601 | sbi->total_valid_block_count = | |
602 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
603 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
604 | sbi->alloc_valid_block_count = 0; | |
605 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
606 | spin_lock_init(&sbi->dir_inode_lock); | |
607 | ||
aff063e2 JK |
608 | init_orphan_info(sbi); |
609 | ||
610 | /* setup f2fs internal modules */ | |
611 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
612 | if (err) { |
613 | f2fs_msg(sb, KERN_ERR, | |
614 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 615 | goto free_sm; |
a07ef784 | 616 | } |
aff063e2 | 617 | err = build_node_manager(sbi); |
a07ef784 NJ |
618 | if (err) { |
619 | f2fs_msg(sb, KERN_ERR, | |
620 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 621 | goto free_nm; |
a07ef784 | 622 | } |
aff063e2 JK |
623 | |
624 | build_gc_manager(sbi); | |
625 | ||
626 | /* get an inode for node space */ | |
627 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
628 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 629 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
630 | err = PTR_ERR(sbi->node_inode); |
631 | goto free_nm; | |
632 | } | |
633 | ||
634 | /* if there are nt orphan nodes free them */ | |
635 | err = -EINVAL; | |
30f0c758 | 636 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
637 | goto free_node_inode; |
638 | ||
639 | /* read root inode and dentry */ | |
640 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
641 | if (IS_ERR(root)) { | |
a07ef784 | 642 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
643 | err = PTR_ERR(root); |
644 | goto free_node_inode; | |
645 | } | |
646 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
647 | goto free_root_inode; | |
648 | ||
649 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
650 | if (!sb->s_root) { | |
651 | err = -ENOMEM; | |
652 | goto free_root_inode; | |
653 | } | |
654 | ||
655 | /* recover fsynced data */ | |
6ead1142 JK |
656 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
657 | err = recover_fsync_data(sbi); | |
658 | if (err) { | |
659 | f2fs_msg(sb, KERN_ERR, "Failed to recover fsync data"); | |
660 | goto free_root_inode; | |
661 | } | |
662 | } | |
aff063e2 JK |
663 | |
664 | /* After POR, we can run background GC thread */ | |
665 | err = start_gc_thread(sbi); | |
666 | if (err) | |
667 | goto fail; | |
668 | ||
669 | err = f2fs_build_stats(sbi); | |
670 | if (err) | |
671 | goto fail; | |
672 | ||
d3ee456d NJ |
673 | if (test_opt(sbi, DISCARD)) { |
674 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
675 | if (!blk_queue_discard(q)) | |
676 | f2fs_msg(sb, KERN_WARNING, | |
677 | "mounting with \"discard\" option, but " | |
678 | "the device does not support discard"); | |
679 | } | |
680 | ||
aff063e2 JK |
681 | return 0; |
682 | fail: | |
683 | stop_gc_thread(sbi); | |
684 | free_root_inode: | |
685 | dput(sb->s_root); | |
686 | sb->s_root = NULL; | |
687 | free_node_inode: | |
688 | iput(sbi->node_inode); | |
689 | free_nm: | |
690 | destroy_node_manager(sbi); | |
691 | free_sm: | |
692 | destroy_segment_manager(sbi); | |
693 | free_cp: | |
694 | kfree(sbi->ckpt); | |
695 | free_meta_inode: | |
696 | make_bad_inode(sbi->meta_inode); | |
697 | iput(sbi->meta_inode); | |
698 | free_sb_buf: | |
699 | brelse(raw_super_buf); | |
700 | free_sbi: | |
701 | kfree(sbi); | |
702 | return err; | |
703 | } | |
704 | ||
705 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
706 | const char *dev_name, void *data) | |
707 | { | |
708 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
709 | } | |
710 | ||
711 | static struct file_system_type f2fs_fs_type = { | |
712 | .owner = THIS_MODULE, | |
713 | .name = "f2fs", | |
714 | .mount = f2fs_mount, | |
715 | .kill_sb = kill_block_super, | |
716 | .fs_flags = FS_REQUIRES_DEV, | |
717 | }; | |
718 | ||
6e6093a8 | 719 | static int __init init_inodecache(void) |
aff063e2 JK |
720 | { |
721 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
722 | sizeof(struct f2fs_inode_info), NULL); | |
723 | if (f2fs_inode_cachep == NULL) | |
724 | return -ENOMEM; | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static void destroy_inodecache(void) | |
729 | { | |
730 | /* | |
731 | * Make sure all delayed rcu free inodes are flushed before we | |
732 | * destroy cache. | |
733 | */ | |
734 | rcu_barrier(); | |
735 | kmem_cache_destroy(f2fs_inode_cachep); | |
736 | } | |
737 | ||
738 | static int __init init_f2fs_fs(void) | |
739 | { | |
740 | int err; | |
741 | ||
742 | err = init_inodecache(); | |
743 | if (err) | |
744 | goto fail; | |
745 | err = create_node_manager_caches(); | |
746 | if (err) | |
747 | goto fail; | |
748 | err = create_gc_caches(); | |
749 | if (err) | |
750 | goto fail; | |
751 | err = create_checkpoint_caches(); | |
752 | if (err) | |
753 | goto fail; | |
4589d25d NJ |
754 | err = register_filesystem(&f2fs_fs_type); |
755 | if (err) | |
756 | goto fail; | |
757 | f2fs_create_root_stats(); | |
aff063e2 JK |
758 | fail: |
759 | return err; | |
760 | } | |
761 | ||
762 | static void __exit exit_f2fs_fs(void) | |
763 | { | |
4589d25d | 764 | f2fs_destroy_root_stats(); |
aff063e2 JK |
765 | unregister_filesystem(&f2fs_fs_type); |
766 | destroy_checkpoint_caches(); | |
767 | destroy_gc_caches(); | |
768 | destroy_node_manager_caches(); | |
769 | destroy_inodecache(); | |
770 | } | |
771 | ||
772 | module_init(init_f2fs_fs) | |
773 | module_exit(exit_f2fs_fs) | |
774 | ||
775 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
776 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
777 | MODULE_LICENSE("GPL"); |