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 | 25 | #include <linux/f2fs_fs.h> |
b59d0bae | 26 | #include <linux/sysfs.h> |
aff063e2 JK |
27 | |
28 | #include "f2fs.h" | |
29 | #include "node.h" | |
5ec4e49f | 30 | #include "segment.h" |
aff063e2 | 31 | #include "xattr.h" |
b59d0bae | 32 | #include "gc.h" |
db9f7c1a | 33 | #include "trace.h" |
aff063e2 | 34 | |
a2a4a7e4 NJ |
35 | #define CREATE_TRACE_POINTS |
36 | #include <trace/events/f2fs.h> | |
37 | ||
5e176d54 | 38 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 39 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 40 | static struct kset *f2fs_kset; |
aff063e2 | 41 | |
2658e50d JK |
42 | /* f2fs-wide shrinker description */ |
43 | static struct shrinker f2fs_shrinker_info = { | |
44 | .scan_objects = f2fs_shrink_scan, | |
45 | .count_objects = f2fs_shrink_count, | |
46 | .seeks = DEFAULT_SEEKS, | |
47 | }; | |
48 | ||
aff063e2 | 49 | enum { |
696c018c | 50 | Opt_gc_background, |
aff063e2 | 51 | Opt_disable_roll_forward, |
2d834bf9 | 52 | Opt_norecovery, |
aff063e2 JK |
53 | Opt_discard, |
54 | Opt_noheap, | |
4058c511 | 55 | Opt_user_xattr, |
aff063e2 | 56 | Opt_nouser_xattr, |
4058c511 | 57 | Opt_acl, |
aff063e2 JK |
58 | Opt_noacl, |
59 | Opt_active_logs, | |
60 | Opt_disable_ext_identify, | |
444c580f | 61 | Opt_inline_xattr, |
8274de77 | 62 | Opt_inline_data, |
5efd3c6f | 63 | Opt_inline_dentry, |
6b4afdd7 | 64 | Opt_flush_merge, |
0f7b2abd | 65 | Opt_nobarrier, |
d5053a34 | 66 | Opt_fastboot, |
89672159 | 67 | Opt_extent_cache, |
7daaea25 | 68 | Opt_noextent_cache, |
75342797 | 69 | Opt_noinline_data, |
343f40f0 | 70 | Opt_data_flush, |
aff063e2 JK |
71 | Opt_err, |
72 | }; | |
73 | ||
74 | static match_table_t f2fs_tokens = { | |
696c018c | 75 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 | 76 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
2d834bf9 | 77 | {Opt_norecovery, "norecovery"}, |
aff063e2 JK |
78 | {Opt_discard, "discard"}, |
79 | {Opt_noheap, "no_heap"}, | |
4058c511 | 80 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 81 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 82 | {Opt_acl, "acl"}, |
aff063e2 JK |
83 | {Opt_noacl, "noacl"}, |
84 | {Opt_active_logs, "active_logs=%u"}, | |
85 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 86 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 87 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 88 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 89 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 90 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 91 | {Opt_fastboot, "fastboot"}, |
89672159 | 92 | {Opt_extent_cache, "extent_cache"}, |
7daaea25 | 93 | {Opt_noextent_cache, "noextent_cache"}, |
75342797 | 94 | {Opt_noinline_data, "noinline_data"}, |
343f40f0 | 95 | {Opt_data_flush, "data_flush"}, |
aff063e2 JK |
96 | {Opt_err, NULL}, |
97 | }; | |
98 | ||
b59d0bae | 99 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
100 | enum { |
101 | GC_THREAD, /* struct f2fs_gc_thread */ | |
102 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 103 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 104 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
105 | }; |
106 | ||
b59d0bae NJ |
107 | struct f2fs_attr { |
108 | struct attribute attr; | |
109 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
110 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
111 | const char *, size_t); | |
ea91e9b0 | 112 | int struct_type; |
b59d0bae NJ |
113 | int offset; |
114 | }; | |
115 | ||
ea91e9b0 JK |
116 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
117 | { | |
118 | if (struct_type == GC_THREAD) | |
119 | return (unsigned char *)sbi->gc_thread; | |
120 | else if (struct_type == SM_INFO) | |
121 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
122 | else if (struct_type == NM_INFO) |
123 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
124 | else if (struct_type == F2FS_SBI) |
125 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
126 | return NULL; |
127 | } | |
128 | ||
b59d0bae NJ |
129 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
130 | struct f2fs_sb_info *sbi, char *buf) | |
131 | { | |
ea91e9b0 | 132 | unsigned char *ptr = NULL; |
b59d0bae NJ |
133 | unsigned int *ui; |
134 | ||
ea91e9b0 JK |
135 | ptr = __struct_ptr(sbi, a->struct_type); |
136 | if (!ptr) | |
b59d0bae NJ |
137 | return -EINVAL; |
138 | ||
ea91e9b0 | 139 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
140 | |
141 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
142 | } | |
143 | ||
144 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
145 | struct f2fs_sb_info *sbi, | |
146 | const char *buf, size_t count) | |
147 | { | |
ea91e9b0 | 148 | unsigned char *ptr; |
b59d0bae NJ |
149 | unsigned long t; |
150 | unsigned int *ui; | |
151 | ssize_t ret; | |
152 | ||
ea91e9b0 JK |
153 | ptr = __struct_ptr(sbi, a->struct_type); |
154 | if (!ptr) | |
b59d0bae NJ |
155 | return -EINVAL; |
156 | ||
ea91e9b0 | 157 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
158 | |
159 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
160 | if (ret < 0) | |
161 | return ret; | |
162 | *ui = t; | |
163 | return count; | |
164 | } | |
165 | ||
166 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
167 | struct attribute *attr, char *buf) | |
168 | { | |
169 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
170 | s_kobj); | |
171 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
172 | ||
173 | return a->show ? a->show(a, sbi, buf) : 0; | |
174 | } | |
175 | ||
176 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
177 | const char *buf, size_t len) | |
178 | { | |
179 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
180 | s_kobj); | |
181 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
182 | ||
183 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
184 | } | |
185 | ||
186 | static void f2fs_sb_release(struct kobject *kobj) | |
187 | { | |
188 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
189 | s_kobj); | |
190 | complete(&sbi->s_kobj_unregister); | |
191 | } | |
192 | ||
ea91e9b0 | 193 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
194 | static struct f2fs_attr f2fs_attr_##_name = { \ |
195 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
196 | .show = _show, \ | |
197 | .store = _store, \ | |
ea91e9b0 JK |
198 | .struct_type = _struct_type, \ |
199 | .offset = _offset \ | |
b59d0bae NJ |
200 | } |
201 | ||
ea91e9b0 JK |
202 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
203 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
204 | f2fs_sbi_show, f2fs_sbi_store, \ | |
205 | offsetof(struct struct_name, elname)) | |
b59d0bae | 206 | |
ea91e9b0 JK |
207 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
208 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
209 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
210 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
211 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 212 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
bba681cb | 213 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); |
216fbd64 JK |
214 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
215 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 216 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 217 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
ea1a29a0 | 218 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); |
b1c57c1c | 219 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 220 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
6beceb54 | 221 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); |
d0239e1b | 222 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); |
b59d0bae NJ |
223 | |
224 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
225 | static struct attribute *f2fs_attrs[] = { | |
226 | ATTR_LIST(gc_min_sleep_time), | |
227 | ATTR_LIST(gc_max_sleep_time), | |
228 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 229 | ATTR_LIST(gc_idle), |
ea91e9b0 | 230 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 231 | ATTR_LIST(max_small_discards), |
bba681cb | 232 | ATTR_LIST(batched_trim_sections), |
216fbd64 JK |
233 | ATTR_LIST(ipu_policy), |
234 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 235 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 236 | ATTR_LIST(max_victim_search), |
ab9fa662 | 237 | ATTR_LIST(dir_level), |
cdfc41c1 | 238 | ATTR_LIST(ram_thresh), |
ea1a29a0 | 239 | ATTR_LIST(ra_nid_pages), |
60b99b48 | 240 | ATTR_LIST(cp_interval), |
d0239e1b | 241 | ATTR_LIST(idle_interval), |
b59d0bae NJ |
242 | NULL, |
243 | }; | |
244 | ||
245 | static const struct sysfs_ops f2fs_attr_ops = { | |
246 | .show = f2fs_attr_show, | |
247 | .store = f2fs_attr_store, | |
248 | }; | |
249 | ||
250 | static struct kobj_type f2fs_ktype = { | |
251 | .default_attrs = f2fs_attrs, | |
252 | .sysfs_ops = &f2fs_attr_ops, | |
253 | .release = f2fs_sb_release, | |
254 | }; | |
255 | ||
a07ef784 NJ |
256 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
257 | { | |
258 | struct va_format vaf; | |
259 | va_list args; | |
260 | ||
261 | va_start(args, fmt); | |
262 | vaf.fmt = fmt; | |
263 | vaf.va = &args; | |
264 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
265 | va_end(args); | |
266 | } | |
267 | ||
aff063e2 JK |
268 | static void init_once(void *foo) |
269 | { | |
270 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
271 | ||
aff063e2 JK |
272 | inode_init_once(&fi->vfs_inode); |
273 | } | |
274 | ||
696c018c NJ |
275 | static int parse_options(struct super_block *sb, char *options) |
276 | { | |
277 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
09d54cdd | 278 | struct request_queue *q; |
696c018c NJ |
279 | substring_t args[MAX_OPT_ARGS]; |
280 | char *p, *name; | |
281 | int arg = 0; | |
282 | ||
283 | if (!options) | |
284 | return 0; | |
285 | ||
286 | while ((p = strsep(&options, ",")) != NULL) { | |
287 | int token; | |
288 | if (!*p) | |
289 | continue; | |
290 | /* | |
291 | * Initialize args struct so we know whether arg was | |
292 | * found; some options take optional arguments. | |
293 | */ | |
294 | args[0].to = args[0].from = NULL; | |
295 | token = match_token(p, f2fs_tokens, args); | |
296 | ||
297 | switch (token) { | |
298 | case Opt_gc_background: | |
299 | name = match_strdup(&args[0]); | |
300 | ||
301 | if (!name) | |
302 | return -ENOMEM; | |
6aefd93b | 303 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) { |
696c018c | 304 | set_opt(sbi, BG_GC); |
6aefd93b JK |
305 | clear_opt(sbi, FORCE_FG_GC); |
306 | } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) { | |
696c018c | 307 | clear_opt(sbi, BG_GC); |
6aefd93b JK |
308 | clear_opt(sbi, FORCE_FG_GC); |
309 | } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) { | |
310 | set_opt(sbi, BG_GC); | |
311 | set_opt(sbi, FORCE_FG_GC); | |
312 | } else { | |
696c018c NJ |
313 | kfree(name); |
314 | return -EINVAL; | |
315 | } | |
316 | kfree(name); | |
317 | break; | |
318 | case Opt_disable_roll_forward: | |
319 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
320 | break; | |
2d834bf9 JK |
321 | case Opt_norecovery: |
322 | /* this option mounts f2fs with ro */ | |
323 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
324 | if (!f2fs_readonly(sb)) | |
325 | return -EINVAL; | |
326 | break; | |
696c018c | 327 | case Opt_discard: |
09d54cdd CY |
328 | q = bdev_get_queue(sb->s_bdev); |
329 | if (blk_queue_discard(q)) { | |
330 | set_opt(sbi, DISCARD); | |
331 | } else { | |
332 | f2fs_msg(sb, KERN_WARNING, | |
333 | "mounting with \"discard\" option, but " | |
334 | "the device does not support discard"); | |
335 | } | |
696c018c NJ |
336 | break; |
337 | case Opt_noheap: | |
338 | set_opt(sbi, NOHEAP); | |
339 | break; | |
340 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
341 | case Opt_user_xattr: |
342 | set_opt(sbi, XATTR_USER); | |
343 | break; | |
696c018c NJ |
344 | case Opt_nouser_xattr: |
345 | clear_opt(sbi, XATTR_USER); | |
346 | break; | |
444c580f JK |
347 | case Opt_inline_xattr: |
348 | set_opt(sbi, INLINE_XATTR); | |
349 | break; | |
696c018c | 350 | #else |
4058c511 KA |
351 | case Opt_user_xattr: |
352 | f2fs_msg(sb, KERN_INFO, | |
353 | "user_xattr options not supported"); | |
354 | break; | |
696c018c NJ |
355 | case Opt_nouser_xattr: |
356 | f2fs_msg(sb, KERN_INFO, | |
357 | "nouser_xattr options not supported"); | |
358 | break; | |
444c580f JK |
359 | case Opt_inline_xattr: |
360 | f2fs_msg(sb, KERN_INFO, | |
361 | "inline_xattr options not supported"); | |
362 | break; | |
696c018c NJ |
363 | #endif |
364 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
365 | case Opt_acl: |
366 | set_opt(sbi, POSIX_ACL); | |
367 | break; | |
696c018c NJ |
368 | case Opt_noacl: |
369 | clear_opt(sbi, POSIX_ACL); | |
370 | break; | |
371 | #else | |
4058c511 KA |
372 | case Opt_acl: |
373 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
374 | break; | |
696c018c NJ |
375 | case Opt_noacl: |
376 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
377 | break; | |
378 | #endif | |
379 | case Opt_active_logs: | |
380 | if (args->from && match_int(args, &arg)) | |
381 | return -EINVAL; | |
382 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
383 | return -EINVAL; | |
384 | sbi->active_logs = arg; | |
385 | break; | |
386 | case Opt_disable_ext_identify: | |
387 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
388 | break; | |
8274de77 HL |
389 | case Opt_inline_data: |
390 | set_opt(sbi, INLINE_DATA); | |
391 | break; | |
5efd3c6f CY |
392 | case Opt_inline_dentry: |
393 | set_opt(sbi, INLINE_DENTRY); | |
394 | break; | |
6b4afdd7 JK |
395 | case Opt_flush_merge: |
396 | set_opt(sbi, FLUSH_MERGE); | |
397 | break; | |
0f7b2abd JK |
398 | case Opt_nobarrier: |
399 | set_opt(sbi, NOBARRIER); | |
400 | break; | |
d5053a34 JK |
401 | case Opt_fastboot: |
402 | set_opt(sbi, FASTBOOT); | |
403 | break; | |
89672159 CY |
404 | case Opt_extent_cache: |
405 | set_opt(sbi, EXTENT_CACHE); | |
406 | break; | |
7daaea25 JK |
407 | case Opt_noextent_cache: |
408 | clear_opt(sbi, EXTENT_CACHE); | |
409 | break; | |
75342797 WL |
410 | case Opt_noinline_data: |
411 | clear_opt(sbi, INLINE_DATA); | |
412 | break; | |
343f40f0 CY |
413 | case Opt_data_flush: |
414 | set_opt(sbi, DATA_FLUSH); | |
415 | break; | |
696c018c NJ |
416 | default: |
417 | f2fs_msg(sb, KERN_ERR, | |
418 | "Unrecognized mount option \"%s\" or missing value", | |
419 | p); | |
420 | return -EINVAL; | |
421 | } | |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
aff063e2 JK |
426 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
427 | { | |
428 | struct f2fs_inode_info *fi; | |
429 | ||
a0acdfe0 | 430 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
431 | if (!fi) |
432 | return NULL; | |
433 | ||
434 | init_once((void *) fi); | |
435 | ||
434720fa | 436 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 437 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 438 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
439 | fi->i_current_depth = 1; |
440 | fi->i_advise = 0; | |
d928bfbf | 441 | init_rwsem(&fi->i_sem); |
2710fd7e | 442 | INIT_LIST_HEAD(&fi->dirty_list); |
88b88a66 JK |
443 | INIT_LIST_HEAD(&fi->inmem_pages); |
444 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
445 | |
446 | set_inode_flag(fi, FI_NEW_INODE); | |
447 | ||
444c580f JK |
448 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
449 | set_inode_flag(fi, FI_INLINE_XATTR); | |
450 | ||
ab9fa662 JK |
451 | /* Will be used by directory only */ |
452 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
453 | ||
57e5055b JK |
454 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
455 | fi->i_crypt_info = NULL; | |
456 | #endif | |
aff063e2 JK |
457 | return &fi->vfs_inode; |
458 | } | |
459 | ||
531ad7d5 JK |
460 | static int f2fs_drop_inode(struct inode *inode) |
461 | { | |
462 | /* | |
463 | * This is to avoid a deadlock condition like below. | |
464 | * writeback_single_inode(inode) | |
465 | * - f2fs_write_data_page | |
466 | * - f2fs_gc -> iput -> evict | |
467 | * - inode_wait_for_writeback(inode) | |
468 | */ | |
06e1bc05 JK |
469 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
470 | if (!inode->i_nlink && !is_bad_inode(inode)) { | |
3e72f721 JK |
471 | /* to avoid evict_inode call simultaneously */ |
472 | atomic_inc(&inode->i_count); | |
06e1bc05 JK |
473 | spin_unlock(&inode->i_lock); |
474 | ||
475 | /* some remained atomic pages should discarded */ | |
476 | if (f2fs_is_atomic_file(inode)) | |
477 | commit_inmem_pages(inode, true); | |
478 | ||
3e72f721 JK |
479 | /* should remain fi->extent_tree for writepage */ |
480 | f2fs_destroy_extent_node(inode); | |
481 | ||
06e1bc05 JK |
482 | sb_start_intwrite(inode->i_sb); |
483 | i_size_write(inode, 0); | |
484 | ||
485 | if (F2FS_HAS_BLOCKS(inode)) | |
55f57d2c | 486 | f2fs_truncate(inode, true); |
06e1bc05 JK |
487 | |
488 | sb_end_intwrite(inode->i_sb); | |
489 | ||
490 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
491 | if (F2FS_I(inode)->i_crypt_info) | |
26bf3dc7 JK |
492 | f2fs_free_encryption_info(inode, |
493 | F2FS_I(inode)->i_crypt_info); | |
06e1bc05 JK |
494 | #endif |
495 | spin_lock(&inode->i_lock); | |
3e72f721 | 496 | atomic_dec(&inode->i_count); |
06e1bc05 | 497 | } |
531ad7d5 | 498 | return 0; |
06e1bc05 | 499 | } |
531ad7d5 JK |
500 | return generic_drop_inode(inode); |
501 | } | |
502 | ||
b3783873 JK |
503 | /* |
504 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
505 | * | |
506 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
507 | */ | |
508 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
509 | { | |
510 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
511 | } |
512 | ||
aff063e2 JK |
513 | static void f2fs_i_callback(struct rcu_head *head) |
514 | { | |
515 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
516 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
517 | } | |
518 | ||
25ca923b | 519 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
520 | { |
521 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
522 | } | |
523 | ||
524 | static void f2fs_put_super(struct super_block *sb) | |
525 | { | |
526 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
527 | ||
5e176d54 JK |
528 | if (sbi->s_proc) { |
529 | remove_proc_entry("segment_info", sbi->s_proc); | |
530 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
531 | } | |
b59d0bae | 532 | kobject_del(&sbi->s_kobj); |
5e176d54 | 533 | |
aff063e2 JK |
534 | stop_gc_thread(sbi); |
535 | ||
2658e50d JK |
536 | /* prevent remaining shrinker jobs */ |
537 | mutex_lock(&sbi->umount_mutex); | |
538 | ||
85dc2f2c JK |
539 | /* |
540 | * We don't need to do checkpoint when superblock is clean. | |
541 | * But, the previous checkpoint was not done by umount, it needs to do | |
542 | * clean checkpoint again. | |
543 | */ | |
caf0047e | 544 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 545 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
546 | struct cp_control cpc = { |
547 | .reason = CP_UMOUNT, | |
548 | }; | |
549 | write_checkpoint(sbi, &cpc); | |
550 | } | |
aff063e2 | 551 | |
eca616f8 JK |
552 | /* write_checkpoint can update stat informaion */ |
553 | f2fs_destroy_stats(sbi); | |
554 | ||
cf779cab JK |
555 | /* |
556 | * normally superblock is clean, so we need to release this. | |
557 | * In addition, EIO will skip do checkpoint, we need this as well. | |
558 | */ | |
a49324f1 | 559 | release_ino_entry(sbi); |
4b2fecc8 | 560 | release_discard_addrs(sbi); |
6f12ac25 | 561 | |
2658e50d JK |
562 | f2fs_leave_shrinker(sbi); |
563 | mutex_unlock(&sbi->umount_mutex); | |
564 | ||
aff063e2 JK |
565 | iput(sbi->node_inode); |
566 | iput(sbi->meta_inode); | |
567 | ||
568 | /* destroy f2fs internal modules */ | |
569 | destroy_node_manager(sbi); | |
570 | destroy_segment_manager(sbi); | |
571 | ||
572 | kfree(sbi->ckpt); | |
b59d0bae NJ |
573 | kobject_put(&sbi->s_kobj); |
574 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
575 | |
576 | sb->s_fs_info = NULL; | |
b39f0de2 | 577 | kfree(sbi->raw_super); |
aff063e2 JK |
578 | kfree(sbi); |
579 | } | |
580 | ||
581 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
582 | { | |
583 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
c34f42e2 | 584 | int err = 0; |
aff063e2 | 585 | |
a2a4a7e4 NJ |
586 | trace_f2fs_sync_fs(sb, sync); |
587 | ||
b7473754 | 588 | if (sync) { |
d5053a34 JK |
589 | struct cp_control cpc; |
590 | ||
119ee914 JK |
591 | cpc.reason = __get_cp_reason(sbi); |
592 | ||
b7473754 | 593 | mutex_lock(&sbi->gc_mutex); |
c34f42e2 | 594 | err = write_checkpoint(sbi, &cpc); |
b7473754 | 595 | mutex_unlock(&sbi->gc_mutex); |
b7473754 | 596 | } |
05ca3632 | 597 | f2fs_trace_ios(NULL, 1); |
aff063e2 | 598 | |
c34f42e2 | 599 | return err; |
aff063e2 JK |
600 | } |
601 | ||
d6212a5f CL |
602 | static int f2fs_freeze(struct super_block *sb) |
603 | { | |
604 | int err; | |
605 | ||
77888c1e | 606 | if (f2fs_readonly(sb)) |
d6212a5f CL |
607 | return 0; |
608 | ||
609 | err = f2fs_sync_fs(sb, 1); | |
610 | return err; | |
611 | } | |
612 | ||
613 | static int f2fs_unfreeze(struct super_block *sb) | |
614 | { | |
615 | return 0; | |
616 | } | |
617 | ||
aff063e2 JK |
618 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
619 | { | |
620 | struct super_block *sb = dentry->d_sb; | |
621 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
622 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
623 | block_t total_count, user_block_count, start_count, ovp_count; | |
624 | ||
625 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
626 | user_block_count = sbi->user_block_count; | |
627 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
628 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
629 | buf->f_type = F2FS_SUPER_MAGIC; | |
630 | buf->f_bsize = sbi->blocksize; | |
631 | ||
632 | buf->f_blocks = total_count - start_count; | |
633 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
634 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
635 | ||
c200b1aa CY |
636 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
637 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 638 | |
5a20d339 | 639 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
640 | buf->f_fsid.val[0] = (u32)id; |
641 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
647 | { | |
648 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
649 | ||
6aefd93b JK |
650 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) { |
651 | if (test_opt(sbi, FORCE_FG_GC)) | |
652 | seq_printf(seq, ",background_gc=%s", "sync"); | |
653 | else | |
654 | seq_printf(seq, ",background_gc=%s", "on"); | |
655 | } else { | |
696c018c | 656 | seq_printf(seq, ",background_gc=%s", "off"); |
6aefd93b | 657 | } |
aff063e2 JK |
658 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
659 | seq_puts(seq, ",disable_roll_forward"); | |
660 | if (test_opt(sbi, DISCARD)) | |
661 | seq_puts(seq, ",discard"); | |
662 | if (test_opt(sbi, NOHEAP)) | |
663 | seq_puts(seq, ",no_heap_alloc"); | |
664 | #ifdef CONFIG_F2FS_FS_XATTR | |
665 | if (test_opt(sbi, XATTR_USER)) | |
666 | seq_puts(seq, ",user_xattr"); | |
667 | else | |
668 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
669 | if (test_opt(sbi, INLINE_XATTR)) |
670 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
671 | #endif |
672 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
673 | if (test_opt(sbi, POSIX_ACL)) | |
674 | seq_puts(seq, ",acl"); | |
675 | else | |
676 | seq_puts(seq, ",noacl"); | |
677 | #endif | |
678 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 679 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
680 | if (test_opt(sbi, INLINE_DATA)) |
681 | seq_puts(seq, ",inline_data"); | |
75342797 WL |
682 | else |
683 | seq_puts(seq, ",noinline_data"); | |
5efd3c6f CY |
684 | if (test_opt(sbi, INLINE_DENTRY)) |
685 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 686 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 687 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
688 | if (test_opt(sbi, NOBARRIER)) |
689 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
690 | if (test_opt(sbi, FASTBOOT)) |
691 | seq_puts(seq, ",fastboot"); | |
89672159 CY |
692 | if (test_opt(sbi, EXTENT_CACHE)) |
693 | seq_puts(seq, ",extent_cache"); | |
7daaea25 JK |
694 | else |
695 | seq_puts(seq, ",noextent_cache"); | |
343f40f0 CY |
696 | if (test_opt(sbi, DATA_FLUSH)) |
697 | seq_puts(seq, ",data_flush"); | |
aff063e2 JK |
698 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
5e176d54 JK |
703 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
704 | { | |
705 | struct super_block *sb = seq->private; | |
706 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
707 | unsigned int total_segs = |
708 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
709 | int i; |
710 | ||
90aa6dc9 CY |
711 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
712 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
713 | ||
5e176d54 | 714 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
715 | struct seg_entry *se = get_seg_entry(sbi, i); |
716 | ||
717 | if ((i % 10) == 0) | |
01a5ad82 | 718 | seq_printf(seq, "%-10d", i); |
90aa6dc9 CY |
719 | seq_printf(seq, "%d|%-3u", se->type, |
720 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
721 | if ((i % 10) == 9 || i == (total_segs - 1)) |
722 | seq_putc(seq, '\n'); | |
5e176d54 | 723 | else |
46c04366 | 724 | seq_putc(seq, ' '); |
5e176d54 | 725 | } |
46c04366 | 726 | |
5e176d54 JK |
727 | return 0; |
728 | } | |
729 | ||
730 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
731 | { | |
732 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
733 | } | |
734 | ||
735 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
736 | .owner = THIS_MODULE, | |
737 | .open = segment_info_open_fs, | |
738 | .read = seq_read, | |
739 | .llseek = seq_lseek, | |
740 | .release = single_release, | |
741 | }; | |
742 | ||
498c5e9f YH |
743 | static void default_options(struct f2fs_sb_info *sbi) |
744 | { | |
745 | /* init some FS parameters */ | |
746 | sbi->active_logs = NR_CURSEG_TYPE; | |
747 | ||
748 | set_opt(sbi, BG_GC); | |
749 | set_opt(sbi, INLINE_DATA); | |
3e72f721 | 750 | set_opt(sbi, EXTENT_CACHE); |
498c5e9f YH |
751 | |
752 | #ifdef CONFIG_F2FS_FS_XATTR | |
753 | set_opt(sbi, XATTR_USER); | |
754 | #endif | |
755 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
756 | set_opt(sbi, POSIX_ACL); | |
757 | #endif | |
758 | } | |
759 | ||
696c018c NJ |
760 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
761 | { | |
762 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
763 | struct f2fs_mount_info org_mount_opt; | |
764 | int err, active_logs; | |
876dc59e GZ |
765 | bool need_restart_gc = false; |
766 | bool need_stop_gc = false; | |
9cd81ce3 | 767 | bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE); |
696c018c | 768 | |
02b9984d TT |
769 | sync_filesystem(sb); |
770 | ||
696c018c NJ |
771 | /* |
772 | * Save the old mount options in case we | |
773 | * need to restore them. | |
774 | */ | |
775 | org_mount_opt = sbi->mount_opt; | |
776 | active_logs = sbi->active_logs; | |
777 | ||
26666c8a | 778 | sbi->mount_opt.opt = 0; |
498c5e9f | 779 | default_options(sbi); |
26666c8a | 780 | |
696c018c NJ |
781 | /* parse mount options */ |
782 | err = parse_options(sb, data); | |
783 | if (err) | |
784 | goto restore_opts; | |
785 | ||
786 | /* | |
787 | * Previous and new state of filesystem is RO, | |
876dc59e | 788 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 789 | */ |
6b2920a5 | 790 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
791 | goto skip; |
792 | ||
9cd81ce3 CY |
793 | /* disallow enable/disable extent_cache dynamically */ |
794 | if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) { | |
795 | err = -EINVAL; | |
796 | f2fs_msg(sbi->sb, KERN_WARNING, | |
797 | "switch extent_cache option is not allowed"); | |
798 | goto restore_opts; | |
799 | } | |
800 | ||
696c018c NJ |
801 | /* |
802 | * We stop the GC thread if FS is mounted as RO | |
803 | * or if background_gc = off is passed in mount | |
804 | * option. Also sync the filesystem. | |
805 | */ | |
806 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
807 | if (sbi->gc_thread) { | |
808 | stop_gc_thread(sbi); | |
809 | f2fs_sync_fs(sb, 1); | |
876dc59e | 810 | need_restart_gc = true; |
696c018c | 811 | } |
aba291b3 | 812 | } else if (!sbi->gc_thread) { |
696c018c NJ |
813 | err = start_gc_thread(sbi); |
814 | if (err) | |
815 | goto restore_opts; | |
876dc59e GZ |
816 | need_stop_gc = true; |
817 | } | |
818 | ||
819 | /* | |
820 | * We stop issue flush thread if FS is mounted as RO | |
821 | * or if flush_merge is not passed in mount option. | |
822 | */ | |
823 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 824 | destroy_flush_cmd_control(sbi); |
aba291b3 | 825 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
826 | err = create_flush_cmd_control(sbi); |
827 | if (err) | |
a688b9d9 | 828 | goto restore_gc; |
696c018c NJ |
829 | } |
830 | skip: | |
831 | /* Update the POSIXACL Flag */ | |
832 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
833 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
834 | return 0; | |
876dc59e GZ |
835 | restore_gc: |
836 | if (need_restart_gc) { | |
837 | if (start_gc_thread(sbi)) | |
838 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 839 | "background gc thread has stopped"); |
876dc59e GZ |
840 | } else if (need_stop_gc) { |
841 | stop_gc_thread(sbi); | |
842 | } | |
696c018c NJ |
843 | restore_opts: |
844 | sbi->mount_opt = org_mount_opt; | |
845 | sbi->active_logs = active_logs; | |
846 | return err; | |
847 | } | |
848 | ||
aff063e2 JK |
849 | static struct super_operations f2fs_sops = { |
850 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 851 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
852 | .destroy_inode = f2fs_destroy_inode, |
853 | .write_inode = f2fs_write_inode, | |
b3783873 | 854 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
855 | .show_options = f2fs_show_options, |
856 | .evict_inode = f2fs_evict_inode, | |
857 | .put_super = f2fs_put_super, | |
858 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
859 | .freeze_fs = f2fs_freeze, |
860 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 861 | .statfs = f2fs_statfs, |
696c018c | 862 | .remount_fs = f2fs_remount, |
aff063e2 JK |
863 | }; |
864 | ||
865 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
866 | u64 ino, u32 generation) | |
867 | { | |
868 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
869 | struct inode *inode; | |
870 | ||
d6b7d4b3 | 871 | if (check_nid_range(sbi, ino)) |
910bb12d | 872 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
873 | |
874 | /* | |
875 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
876 | * However f2fs_iget currently does appropriate checks to handle stale | |
877 | * inodes so everything is OK. | |
878 | */ | |
879 | inode = f2fs_iget(sb, ino); | |
880 | if (IS_ERR(inode)) | |
881 | return ERR_CAST(inode); | |
6bacf52f | 882 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
883 | /* we didn't find the right inode.. */ |
884 | iput(inode); | |
885 | return ERR_PTR(-ESTALE); | |
886 | } | |
887 | return inode; | |
888 | } | |
889 | ||
890 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
891 | int fh_len, int fh_type) | |
892 | { | |
893 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
894 | f2fs_nfs_get_inode); | |
895 | } | |
896 | ||
897 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
898 | int fh_len, int fh_type) | |
899 | { | |
900 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
901 | f2fs_nfs_get_inode); | |
902 | } | |
903 | ||
904 | static const struct export_operations f2fs_export_ops = { | |
905 | .fh_to_dentry = f2fs_fh_to_dentry, | |
906 | .fh_to_parent = f2fs_fh_to_parent, | |
907 | .get_parent = f2fs_get_parent, | |
908 | }; | |
909 | ||
e0afc4d6 | 910 | static loff_t max_file_blocks(void) |
aff063e2 | 911 | { |
de93653f | 912 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
913 | loff_t leaf_count = ADDRS_PER_BLOCK; |
914 | ||
915 | /* two direct node blocks */ | |
916 | result += (leaf_count * 2); | |
917 | ||
918 | /* two indirect node blocks */ | |
919 | leaf_count *= NIDS_PER_BLOCK; | |
920 | result += (leaf_count * 2); | |
921 | ||
922 | /* one double indirect node block */ | |
923 | leaf_count *= NIDS_PER_BLOCK; | |
924 | result += leaf_count; | |
925 | ||
aff063e2 JK |
926 | return result; |
927 | } | |
928 | ||
9a59b62f CY |
929 | static inline bool sanity_check_area_boundary(struct super_block *sb, |
930 | struct f2fs_super_block *raw_super) | |
931 | { | |
932 | u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); | |
933 | u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr); | |
934 | u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr); | |
935 | u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr); | |
936 | u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
937 | u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
938 | u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt); | |
939 | u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit); | |
940 | u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat); | |
941 | u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa); | |
942 | u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main); | |
943 | u32 segment_count = le32_to_cpu(raw_super->segment_count); | |
944 | u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
945 | ||
946 | if (segment0_blkaddr != cp_blkaddr) { | |
947 | f2fs_msg(sb, KERN_INFO, | |
948 | "Mismatch start address, segment0(%u) cp_blkaddr(%u)", | |
949 | segment0_blkaddr, cp_blkaddr); | |
950 | return true; | |
951 | } | |
952 | ||
953 | if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) != | |
954 | sit_blkaddr) { | |
955 | f2fs_msg(sb, KERN_INFO, | |
956 | "Wrong CP boundary, start(%u) end(%u) blocks(%u)", | |
957 | cp_blkaddr, sit_blkaddr, | |
958 | segment_count_ckpt << log_blocks_per_seg); | |
959 | return true; | |
960 | } | |
961 | ||
962 | if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) != | |
963 | nat_blkaddr) { | |
964 | f2fs_msg(sb, KERN_INFO, | |
965 | "Wrong SIT boundary, start(%u) end(%u) blocks(%u)", | |
966 | sit_blkaddr, nat_blkaddr, | |
967 | segment_count_sit << log_blocks_per_seg); | |
968 | return true; | |
969 | } | |
970 | ||
971 | if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) != | |
972 | ssa_blkaddr) { | |
973 | f2fs_msg(sb, KERN_INFO, | |
974 | "Wrong NAT boundary, start(%u) end(%u) blocks(%u)", | |
975 | nat_blkaddr, ssa_blkaddr, | |
976 | segment_count_nat << log_blocks_per_seg); | |
977 | return true; | |
978 | } | |
979 | ||
980 | if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) != | |
981 | main_blkaddr) { | |
982 | f2fs_msg(sb, KERN_INFO, | |
983 | "Wrong SSA boundary, start(%u) end(%u) blocks(%u)", | |
984 | ssa_blkaddr, main_blkaddr, | |
985 | segment_count_ssa << log_blocks_per_seg); | |
986 | return true; | |
987 | } | |
988 | ||
989 | if (main_blkaddr + (segment_count_main << log_blocks_per_seg) != | |
990 | segment0_blkaddr + (segment_count << log_blocks_per_seg)) { | |
991 | f2fs_msg(sb, KERN_INFO, | |
992 | "Wrong MAIN_AREA boundary, start(%u) end(%u) blocks(%u)", | |
993 | main_blkaddr, | |
994 | segment0_blkaddr + (segment_count << log_blocks_per_seg), | |
995 | segment_count_main << log_blocks_per_seg); | |
996 | return true; | |
997 | } | |
998 | ||
999 | return false; | |
1000 | } | |
1001 | ||
a07ef784 NJ |
1002 | static int sanity_check_raw_super(struct super_block *sb, |
1003 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
1004 | { |
1005 | unsigned int blocksize; | |
1006 | ||
a07ef784 NJ |
1007 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
1008 | f2fs_msg(sb, KERN_INFO, | |
1009 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
1010 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 1011 | return 1; |
a07ef784 | 1012 | } |
aff063e2 | 1013 | |
5c9b4692 | 1014 | /* Currently, support only 4KB page cache size */ |
1015 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
1016 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 1017 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 1018 | PAGE_CACHE_SIZE); |
1019 | return 1; | |
1020 | } | |
1021 | ||
aff063e2 JK |
1022 | /* Currently, support only 4KB block size */ |
1023 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 1024 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
1025 | f2fs_msg(sb, KERN_INFO, |
1026 | "Invalid blocksize (%u), supports only 4KB\n", | |
1027 | blocksize); | |
aff063e2 | 1028 | return 1; |
a07ef784 | 1029 | } |
5c9b4692 | 1030 | |
9a59b62f CY |
1031 | /* check log blocks per segment */ |
1032 | if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) { | |
1033 | f2fs_msg(sb, KERN_INFO, | |
1034 | "Invalid log blocks per segment (%u)\n", | |
1035 | le32_to_cpu(raw_super->log_blocks_per_seg)); | |
1036 | return 1; | |
1037 | } | |
1038 | ||
55cf9cb6 CY |
1039 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
1040 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
1041 | F2FS_MAX_LOG_SECTOR_SIZE || | |
1042 | le32_to_cpu(raw_super->log_sectorsize) < | |
1043 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
1044 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
1045 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 1046 | return 1; |
a07ef784 | 1047 | } |
55cf9cb6 CY |
1048 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
1049 | le32_to_cpu(raw_super->log_sectorsize) != | |
1050 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
1051 | f2fs_msg(sb, KERN_INFO, | |
1052 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
1053 | le32_to_cpu(raw_super->log_sectors_per_block), | |
1054 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 1055 | return 1; |
a07ef784 | 1056 | } |
9a59b62f CY |
1057 | |
1058 | /* check reserved ino info */ | |
1059 | if (le32_to_cpu(raw_super->node_ino) != 1 || | |
1060 | le32_to_cpu(raw_super->meta_ino) != 2 || | |
1061 | le32_to_cpu(raw_super->root_ino) != 3) { | |
1062 | f2fs_msg(sb, KERN_INFO, | |
1063 | "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)", | |
1064 | le32_to_cpu(raw_super->node_ino), | |
1065 | le32_to_cpu(raw_super->meta_ino), | |
1066 | le32_to_cpu(raw_super->root_ino)); | |
1067 | return 1; | |
1068 | } | |
1069 | ||
1070 | /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */ | |
1071 | if (sanity_check_area_boundary(sb, raw_super)) | |
1072 | return 1; | |
1073 | ||
aff063e2 JK |
1074 | return 0; |
1075 | } | |
1076 | ||
577e3495 | 1077 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
1078 | { |
1079 | unsigned int total, fsmeta; | |
577e3495 JK |
1080 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
1081 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
1082 | |
1083 | total = le32_to_cpu(raw_super->segment_count); | |
1084 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
1085 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
1086 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
1087 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
1088 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
1089 | ||
6bacf52f | 1090 | if (unlikely(fsmeta >= total)) |
aff063e2 | 1091 | return 1; |
577e3495 | 1092 | |
1e968fdf | 1093 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
1094 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
1095 | return 1; | |
1096 | } | |
aff063e2 JK |
1097 | return 0; |
1098 | } | |
1099 | ||
1100 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
1101 | { | |
1102 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
1103 | int i; | |
1104 | ||
1105 | sbi->log_sectors_per_block = | |
1106 | le32_to_cpu(raw_super->log_sectors_per_block); | |
1107 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
1108 | sbi->blocksize = 1 << sbi->log_blocksize; | |
1109 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
1110 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
1111 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
1112 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
1113 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
1114 | sbi->total_node_count = | |
1115 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
1116 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
1117 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
1118 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
1119 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 1120 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 1121 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
1122 | |
1123 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
1124 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
1125 | |
1126 | sbi->dir_level = DEF_DIR_LEVEL; | |
6beceb54 | 1127 | sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL; |
d0239e1b | 1128 | sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL; |
caf0047e | 1129 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
2658e50d JK |
1130 | |
1131 | INIT_LIST_HEAD(&sbi->s_list); | |
1132 | mutex_init(&sbi->umount_mutex); | |
aff063e2 JK |
1133 | } |
1134 | ||
9076a75f GZ |
1135 | /* |
1136 | * Read f2fs raw super block. | |
1137 | * Because we have two copies of super block, so read the first one at first, | |
1138 | * if the first one is invalid, move to read the second one. | |
1139 | */ | |
1140 | static int read_raw_super_block(struct super_block *sb, | |
1141 | struct f2fs_super_block **raw_super, | |
e8240f65 | 1142 | int *valid_super_block, int *recovery) |
14d7e9de | 1143 | { |
9076a75f | 1144 | int block = 0; |
e8240f65 CY |
1145 | struct buffer_head *bh; |
1146 | struct f2fs_super_block *super, *buf; | |
da554e48 | 1147 | int err = 0; |
14d7e9de | 1148 | |
b39f0de2 YH |
1149 | super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL); |
1150 | if (!super) | |
1151 | return -ENOMEM; | |
9076a75f | 1152 | retry: |
e8240f65 CY |
1153 | bh = sb_bread(sb, block); |
1154 | if (!bh) { | |
da554e48 | 1155 | *recovery = 1; |
9076a75f GZ |
1156 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
1157 | block + 1); | |
e8240f65 CY |
1158 | err = -EIO; |
1159 | goto next; | |
14d7e9de | 1160 | } |
1161 | ||
e8240f65 | 1162 | buf = (struct f2fs_super_block *)(bh->b_data + F2FS_SUPER_OFFSET); |
14d7e9de | 1163 | |
1164 | /* sanity checking of raw super */ | |
e8240f65 CY |
1165 | if (sanity_check_raw_super(sb, buf)) { |
1166 | brelse(bh); | |
da554e48 | 1167 | *recovery = 1; |
6c311ec6 CF |
1168 | f2fs_msg(sb, KERN_ERR, |
1169 | "Can't find valid F2FS filesystem in %dth superblock", | |
1170 | block + 1); | |
e8240f65 CY |
1171 | err = -EINVAL; |
1172 | goto next; | |
9076a75f | 1173 | } |
14d7e9de | 1174 | |
da554e48 | 1175 | if (!*raw_super) { |
e8240f65 CY |
1176 | memcpy(super, buf, sizeof(*super)); |
1177 | *valid_super_block = block; | |
da554e48 | 1178 | *raw_super = super; |
da554e48 | 1179 | } |
e8240f65 | 1180 | brelse(bh); |
da554e48 | 1181 | |
e8240f65 | 1182 | next: |
da554e48 | 1183 | /* check the validity of the second superblock */ |
1184 | if (block == 0) { | |
1185 | block++; | |
1186 | goto retry; | |
1187 | } | |
1188 | ||
da554e48 | 1189 | /* No valid superblock */ |
b39f0de2 YH |
1190 | if (!*raw_super) { |
1191 | kfree(super); | |
da554e48 | 1192 | return err; |
b39f0de2 | 1193 | } |
da554e48 | 1194 | |
9076a75f | 1195 | return 0; |
14d7e9de | 1196 | } |
1197 | ||
06d6f226 | 1198 | static int __f2fs_commit_super(struct f2fs_sb_info *sbi, int block) |
26d815ad | 1199 | { |
b39f0de2 | 1200 | struct f2fs_super_block *super = F2FS_RAW_SUPER(sbi); |
5d909cdb | 1201 | struct buffer_head *bh; |
26d815ad JK |
1202 | int err; |
1203 | ||
b3980910 | 1204 | bh = sb_getblk(sbi->sb, block); |
5d909cdb JK |
1205 | if (!bh) |
1206 | return -EIO; | |
26d815ad | 1207 | |
5d909cdb | 1208 | lock_buffer(bh); |
b39f0de2 | 1209 | memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super)); |
5d909cdb JK |
1210 | set_buffer_uptodate(bh); |
1211 | set_buffer_dirty(bh); | |
1212 | unlock_buffer(bh); | |
1213 | ||
1214 | /* it's rare case, we can do fua all the time */ | |
1215 | err = __sync_dirty_buffer(bh, WRITE_FLUSH_FUA); | |
1216 | brelse(bh); | |
c5bda1c8 | 1217 | |
b3980910 CY |
1218 | return err; |
1219 | } | |
1220 | ||
1221 | int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) | |
1222 | { | |
1223 | int err; | |
1224 | ||
1225 | /* write back-up superblock first */ | |
1226 | err = __f2fs_commit_super(sbi, sbi->valid_super_block ? 0 : 1); | |
1227 | ||
c5bda1c8 CY |
1228 | /* if we are in recovery path, skip writing valid superblock */ |
1229 | if (recover || err) | |
5d909cdb | 1230 | return err; |
26d815ad JK |
1231 | |
1232 | /* write current valid superblock */ | |
b3980910 | 1233 | return __f2fs_commit_super(sbi, sbi->valid_super_block); |
26d815ad JK |
1234 | } |
1235 | ||
aff063e2 JK |
1236 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
1237 | { | |
1238 | struct f2fs_sb_info *sbi; | |
da554e48 | 1239 | struct f2fs_super_block *raw_super; |
aff063e2 | 1240 | struct inode *root; |
da554e48 | 1241 | long err; |
2adc3505 | 1242 | bool retry = true, need_fsck = false; |
dabc4a5c | 1243 | char *options = NULL; |
e8240f65 | 1244 | int recovery, i, valid_super_block; |
aff063e2 | 1245 | |
ed2e621a | 1246 | try_onemore: |
da554e48 | 1247 | err = -EINVAL; |
1248 | raw_super = NULL; | |
e8240f65 | 1249 | valid_super_block = -1; |
da554e48 | 1250 | recovery = 0; |
1251 | ||
aff063e2 JK |
1252 | /* allocate memory for f2fs-specific super block info */ |
1253 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
1254 | if (!sbi) | |
1255 | return -ENOMEM; | |
1256 | ||
ff9234ad | 1257 | /* set a block size */ |
6bacf52f | 1258 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 1259 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 1260 | goto free_sbi; |
a07ef784 | 1261 | } |
aff063e2 | 1262 | |
e8240f65 CY |
1263 | err = read_raw_super_block(sb, &raw_super, &valid_super_block, |
1264 | &recovery); | |
9076a75f GZ |
1265 | if (err) |
1266 | goto free_sbi; | |
1267 | ||
5fb08372 | 1268 | sb->s_fs_info = sbi; |
498c5e9f | 1269 | default_options(sbi); |
aff063e2 | 1270 | /* parse mount options */ |
dabc4a5c JK |
1271 | options = kstrdup((const char *)data, GFP_KERNEL); |
1272 | if (data && !options) { | |
1273 | err = -ENOMEM; | |
aff063e2 | 1274 | goto free_sb_buf; |
dabc4a5c JK |
1275 | } |
1276 | ||
1277 | err = parse_options(sb, options); | |
1278 | if (err) | |
1279 | goto free_options; | |
aff063e2 | 1280 | |
e0afc4d6 CY |
1281 | sbi->max_file_blocks = max_file_blocks(); |
1282 | sb->s_maxbytes = sbi->max_file_blocks << | |
1283 | le32_to_cpu(raw_super->log_blocksize); | |
aff063e2 JK |
1284 | sb->s_max_links = F2FS_LINK_MAX; |
1285 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1286 | ||
1287 | sb->s_op = &f2fs_sops; | |
1288 | sb->s_xattr = f2fs_xattr_handlers; | |
1289 | sb->s_export_op = &f2fs_export_ops; | |
1290 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1291 | sb->s_time_gran = 1; |
1292 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1293 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1294 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1295 | ||
1296 | /* init f2fs-specific super block info */ | |
1297 | sbi->sb = sb; | |
1298 | sbi->raw_super = raw_super; | |
e8240f65 | 1299 | sbi->valid_super_block = valid_super_block; |
aff063e2 | 1300 | mutex_init(&sbi->gc_mutex); |
5463e7c1 | 1301 | mutex_init(&sbi->writepages); |
aff063e2 | 1302 | mutex_init(&sbi->cp_mutex); |
b3582c68 | 1303 | init_rwsem(&sbi->node_write); |
315df839 JK |
1304 | |
1305 | /* disallow all the data/node/meta page writes */ | |
1306 | set_sbi_flag(sbi, SBI_POR_DOING); | |
aff063e2 | 1307 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1308 | |
df0f8dc0 | 1309 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1310 | sbi->read_io.sbi = sbi; |
1311 | sbi->read_io.bio = NULL; | |
1312 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1313 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1314 | sbi->write_io[i].sbi = sbi; |
1315 | sbi->write_io[i].bio = NULL; | |
1316 | } | |
971767ca | 1317 | |
e479556b | 1318 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1319 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1320 | init_sb_info(sbi); |
1321 | ||
1322 | /* get an inode for meta space */ | |
1323 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1324 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1325 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1326 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1327 | goto free_options; |
aff063e2 JK |
1328 | } |
1329 | ||
1330 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1331 | if (err) { |
1332 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1333 | goto free_meta_inode; |
a07ef784 | 1334 | } |
aff063e2 JK |
1335 | |
1336 | /* sanity checking of checkpoint */ | |
1337 | err = -EINVAL; | |
577e3495 | 1338 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1339 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1340 | goto free_cp; |
a07ef784 | 1341 | } |
aff063e2 JK |
1342 | |
1343 | sbi->total_valid_node_count = | |
1344 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1345 | sbi->total_valid_inode_count = | |
1346 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1347 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1348 | sbi->total_valid_block_count = | |
1349 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1350 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1351 | sbi->alloc_valid_block_count = 0; | |
c227f912 CY |
1352 | for (i = 0; i < NR_INODE_TYPE; i++) { |
1353 | INIT_LIST_HEAD(&sbi->inode_list[i]); | |
1354 | spin_lock_init(&sbi->inode_lock[i]); | |
1355 | } | |
aff063e2 | 1356 | |
1dcc336b CY |
1357 | init_extent_cache_info(sbi); |
1358 | ||
6451e041 | 1359 | init_ino_entry_info(sbi); |
aff063e2 JK |
1360 | |
1361 | /* setup f2fs internal modules */ | |
1362 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1363 | if (err) { |
1364 | f2fs_msg(sb, KERN_ERR, | |
1365 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1366 | goto free_sm; |
a07ef784 | 1367 | } |
aff063e2 | 1368 | err = build_node_manager(sbi); |
a07ef784 NJ |
1369 | if (err) { |
1370 | f2fs_msg(sb, KERN_ERR, | |
1371 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1372 | goto free_nm; |
a07ef784 | 1373 | } |
aff063e2 JK |
1374 | |
1375 | build_gc_manager(sbi); | |
1376 | ||
1377 | /* get an inode for node space */ | |
1378 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1379 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1380 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1381 | err = PTR_ERR(sbi->node_inode); |
1382 | goto free_nm; | |
1383 | } | |
1384 | ||
2658e50d JK |
1385 | f2fs_join_shrinker(sbi); |
1386 | ||
aff063e2 | 1387 | /* if there are nt orphan nodes free them */ |
8c14bfad CY |
1388 | err = recover_orphan_inodes(sbi); |
1389 | if (err) | |
1390 | goto free_node_inode; | |
aff063e2 JK |
1391 | |
1392 | /* read root inode and dentry */ | |
1393 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1394 | if (IS_ERR(root)) { | |
a07ef784 | 1395 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1396 | err = PTR_ERR(root); |
1397 | goto free_node_inode; | |
1398 | } | |
8f99a946 | 1399 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1400 | iput(root); |
8f99a946 | 1401 | err = -EINVAL; |
9d847950 | 1402 | goto free_node_inode; |
8f99a946 | 1403 | } |
aff063e2 JK |
1404 | |
1405 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1406 | if (!sb->s_root) { | |
1407 | err = -ENOMEM; | |
1408 | goto free_root_inode; | |
1409 | } | |
1410 | ||
aff063e2 JK |
1411 | err = f2fs_build_stats(sbi); |
1412 | if (err) | |
6437d1b0 | 1413 | goto free_root_inode; |
aff063e2 | 1414 | |
5e176d54 JK |
1415 | if (f2fs_proc_root) |
1416 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1417 | ||
1418 | if (sbi->s_proc) | |
1419 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1420 | &f2fs_seq_segment_info_fops, sb); | |
1421 | ||
b59d0bae NJ |
1422 | sbi->s_kobj.kset = f2fs_kset; |
1423 | init_completion(&sbi->s_kobj_unregister); | |
1424 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1425 | "%s", sb->s_id); | |
1426 | if (err) | |
6437d1b0 | 1427 | goto free_proc; |
b59d0bae | 1428 | |
6437d1b0 JK |
1429 | /* recover fsynced data */ |
1430 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
081d78c2 JK |
1431 | /* |
1432 | * mount should be failed, when device has readonly mode, and | |
1433 | * previous checkpoint was not done by clean system shutdown. | |
1434 | */ | |
1435 | if (bdev_read_only(sb->s_bdev) && | |
1436 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { | |
1437 | err = -EROFS; | |
1438 | goto free_kobj; | |
1439 | } | |
2adc3505 CY |
1440 | |
1441 | if (need_fsck) | |
1442 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
1443 | ||
6437d1b0 | 1444 | err = recover_fsync_data(sbi); |
ed2e621a | 1445 | if (err) { |
2adc3505 | 1446 | need_fsck = true; |
6437d1b0 JK |
1447 | f2fs_msg(sb, KERN_ERR, |
1448 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1449 | goto free_kobj; |
1450 | } | |
6437d1b0 | 1451 | } |
315df839 JK |
1452 | /* recover_fsync_data() cleared this already */ |
1453 | clear_sbi_flag(sbi, SBI_POR_DOING); | |
b59d0bae | 1454 | |
6437d1b0 JK |
1455 | /* |
1456 | * If filesystem is not mounted as read-only then | |
1457 | * do start the gc_thread. | |
1458 | */ | |
6c029932 | 1459 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1460 | /* After POR, we can run background GC thread.*/ |
1461 | err = start_gc_thread(sbi); | |
1462 | if (err) | |
1463 | goto free_kobj; | |
1464 | } | |
dabc4a5c | 1465 | kfree(options); |
da554e48 | 1466 | |
1467 | /* recover broken superblock */ | |
1468 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { | |
1469 | f2fs_msg(sb, KERN_INFO, "Recover invalid superblock"); | |
c5bda1c8 | 1470 | f2fs_commit_super(sbi, true); |
da554e48 | 1471 | } |
1472 | ||
6beceb54 | 1473 | f2fs_update_time(sbi, CP_TIME); |
d0239e1b | 1474 | f2fs_update_time(sbi, REQ_TIME); |
aff063e2 | 1475 | return 0; |
6437d1b0 JK |
1476 | |
1477 | free_kobj: | |
1478 | kobject_del(&sbi->s_kobj); | |
29ba108d CY |
1479 | kobject_put(&sbi->s_kobj); |
1480 | wait_for_completion(&sbi->s_kobj_unregister); | |
6437d1b0 | 1481 | free_proc: |
1d15bd20 CY |
1482 | if (sbi->s_proc) { |
1483 | remove_proc_entry("segment_info", sbi->s_proc); | |
1484 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1485 | } | |
1486 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1487 | free_root_inode: |
1488 | dput(sb->s_root); | |
1489 | sb->s_root = NULL; | |
1490 | free_node_inode: | |
2658e50d JK |
1491 | mutex_lock(&sbi->umount_mutex); |
1492 | f2fs_leave_shrinker(sbi); | |
aff063e2 | 1493 | iput(sbi->node_inode); |
2658e50d | 1494 | mutex_unlock(&sbi->umount_mutex); |
aff063e2 JK |
1495 | free_nm: |
1496 | destroy_node_manager(sbi); | |
1497 | free_sm: | |
1498 | destroy_segment_manager(sbi); | |
1499 | free_cp: | |
1500 | kfree(sbi->ckpt); | |
1501 | free_meta_inode: | |
1502 | make_bad_inode(sbi->meta_inode); | |
1503 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1504 | free_options: |
1505 | kfree(options); | |
aff063e2 | 1506 | free_sb_buf: |
b39f0de2 | 1507 | kfree(raw_super); |
aff063e2 JK |
1508 | free_sbi: |
1509 | kfree(sbi); | |
ed2e621a JK |
1510 | |
1511 | /* give only one another chance */ | |
1512 | if (retry) { | |
9df47ba7 | 1513 | retry = false; |
ed2e621a JK |
1514 | shrink_dcache_sb(sb); |
1515 | goto try_onemore; | |
1516 | } | |
aff063e2 JK |
1517 | return err; |
1518 | } | |
1519 | ||
1520 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1521 | const char *dev_name, void *data) | |
1522 | { | |
1523 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1524 | } | |
1525 | ||
30a5537f JK |
1526 | static void kill_f2fs_super(struct super_block *sb) |
1527 | { | |
1528 | if (sb->s_root) | |
caf0047e | 1529 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1530 | kill_block_super(sb); |
1531 | } | |
1532 | ||
aff063e2 JK |
1533 | static struct file_system_type f2fs_fs_type = { |
1534 | .owner = THIS_MODULE, | |
1535 | .name = "f2fs", | |
1536 | .mount = f2fs_mount, | |
30a5537f | 1537 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1538 | .fs_flags = FS_REQUIRES_DEV, |
1539 | }; | |
7f78e035 | 1540 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1541 | |
6e6093a8 | 1542 | static int __init init_inodecache(void) |
aff063e2 | 1543 | { |
5d097056 VD |
1544 | f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache", |
1545 | sizeof(struct f2fs_inode_info), 0, | |
1546 | SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL); | |
6bacf52f | 1547 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1548 | return -ENOMEM; |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | static void destroy_inodecache(void) | |
1553 | { | |
1554 | /* | |
1555 | * Make sure all delayed rcu free inodes are flushed before we | |
1556 | * destroy cache. | |
1557 | */ | |
1558 | rcu_barrier(); | |
1559 | kmem_cache_destroy(f2fs_inode_cachep); | |
1560 | } | |
1561 | ||
1562 | static int __init init_f2fs_fs(void) | |
1563 | { | |
1564 | int err; | |
1565 | ||
c0508650 JK |
1566 | f2fs_build_trace_ios(); |
1567 | ||
aff063e2 JK |
1568 | err = init_inodecache(); |
1569 | if (err) | |
1570 | goto fail; | |
1571 | err = create_node_manager_caches(); | |
1572 | if (err) | |
9890ff3f | 1573 | goto free_inodecache; |
7fd9e544 | 1574 | err = create_segment_manager_caches(); |
aff063e2 | 1575 | if (err) |
9890ff3f | 1576 | goto free_node_manager_caches; |
aff063e2 JK |
1577 | err = create_checkpoint_caches(); |
1578 | if (err) | |
06292073 | 1579 | goto free_segment_manager_caches; |
1dcc336b CY |
1580 | err = create_extent_cache(); |
1581 | if (err) | |
1582 | goto free_checkpoint_caches; | |
b59d0bae | 1583 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1584 | if (!f2fs_kset) { |
1585 | err = -ENOMEM; | |
1dcc336b | 1586 | goto free_extent_cache; |
6e6b978c | 1587 | } |
cfc4d971 | 1588 | err = f2fs_init_crypto(); |
4589d25d | 1589 | if (err) |
9890ff3f | 1590 | goto free_kset; |
2658e50d JK |
1591 | |
1592 | err = register_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1593 | if (err) |
1594 | goto free_crypto; | |
2658e50d JK |
1595 | |
1596 | err = register_filesystem(&f2fs_fs_type); | |
1597 | if (err) | |
1598 | goto free_shrinker; | |
787c7b8c CY |
1599 | err = f2fs_create_root_stats(); |
1600 | if (err) | |
1601 | goto free_filesystem; | |
5e176d54 | 1602 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1603 | return 0; |
1604 | ||
787c7b8c CY |
1605 | free_filesystem: |
1606 | unregister_filesystem(&f2fs_fs_type); | |
2658e50d JK |
1607 | free_shrinker: |
1608 | unregister_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1609 | free_crypto: |
1610 | f2fs_exit_crypto(); | |
9890ff3f ZH |
1611 | free_kset: |
1612 | kset_unregister(f2fs_kset); | |
1dcc336b CY |
1613 | free_extent_cache: |
1614 | destroy_extent_cache(); | |
9890ff3f ZH |
1615 | free_checkpoint_caches: |
1616 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1617 | free_segment_manager_caches: |
1618 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1619 | free_node_manager_caches: |
1620 | destroy_node_manager_caches(); | |
1621 | free_inodecache: | |
1622 | destroy_inodecache(); | |
aff063e2 JK |
1623 | fail: |
1624 | return err; | |
1625 | } | |
1626 | ||
1627 | static void __exit exit_f2fs_fs(void) | |
1628 | { | |
5e176d54 | 1629 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1630 | f2fs_destroy_root_stats(); |
2658e50d | 1631 | unregister_shrinker(&f2fs_shrinker_info); |
aff063e2 | 1632 | unregister_filesystem(&f2fs_fs_type); |
cfc4d971 | 1633 | f2fs_exit_crypto(); |
fdf6c8be | 1634 | destroy_extent_cache(); |
aff063e2 | 1635 | destroy_checkpoint_caches(); |
5dcd8a71 | 1636 | destroy_segment_manager_caches(); |
aff063e2 JK |
1637 | destroy_node_manager_caches(); |
1638 | destroy_inodecache(); | |
b59d0bae | 1639 | kset_unregister(f2fs_kset); |
351f4fba | 1640 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1641 | } |
1642 | ||
1643 | module_init(init_f2fs_fs) | |
1644 | module_exit(exit_f2fs_fs) | |
1645 | ||
1646 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1647 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1648 | MODULE_LICENSE("GPL"); |