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 | ||
8f1dbbbb SL |
129 | static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a, |
130 | struct f2fs_sb_info *sbi, char *buf) | |
131 | { | |
132 | struct super_block *sb = sbi->sb; | |
133 | ||
134 | if (!sb->s_bdev->bd_part) | |
135 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
136 | ||
137 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
138 | (unsigned long long)(sbi->kbytes_written + | |
139 | BD_PART_WRITTEN(sbi))); | |
140 | } | |
141 | ||
b59d0bae NJ |
142 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
143 | struct f2fs_sb_info *sbi, char *buf) | |
144 | { | |
ea91e9b0 | 145 | unsigned char *ptr = NULL; |
b59d0bae NJ |
146 | unsigned int *ui; |
147 | ||
ea91e9b0 JK |
148 | ptr = __struct_ptr(sbi, a->struct_type); |
149 | if (!ptr) | |
b59d0bae NJ |
150 | return -EINVAL; |
151 | ||
ea91e9b0 | 152 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
153 | |
154 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
155 | } | |
156 | ||
157 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
158 | struct f2fs_sb_info *sbi, | |
159 | const char *buf, size_t count) | |
160 | { | |
ea91e9b0 | 161 | unsigned char *ptr; |
b59d0bae NJ |
162 | unsigned long t; |
163 | unsigned int *ui; | |
164 | ssize_t ret; | |
165 | ||
ea91e9b0 JK |
166 | ptr = __struct_ptr(sbi, a->struct_type); |
167 | if (!ptr) | |
b59d0bae NJ |
168 | return -EINVAL; |
169 | ||
ea91e9b0 | 170 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
171 | |
172 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
173 | if (ret < 0) | |
174 | return ret; | |
175 | *ui = t; | |
176 | return count; | |
177 | } | |
178 | ||
179 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
180 | struct attribute *attr, char *buf) | |
181 | { | |
182 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
183 | s_kobj); | |
184 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
185 | ||
186 | return a->show ? a->show(a, sbi, buf) : 0; | |
187 | } | |
188 | ||
189 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
190 | const char *buf, size_t len) | |
191 | { | |
192 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
193 | s_kobj); | |
194 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
195 | ||
196 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
197 | } | |
198 | ||
199 | static void f2fs_sb_release(struct kobject *kobj) | |
200 | { | |
201 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
202 | s_kobj); | |
203 | complete(&sbi->s_kobj_unregister); | |
204 | } | |
205 | ||
ea91e9b0 | 206 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
207 | static struct f2fs_attr f2fs_attr_##_name = { \ |
208 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
209 | .show = _show, \ | |
210 | .store = _store, \ | |
ea91e9b0 JK |
211 | .struct_type = _struct_type, \ |
212 | .offset = _offset \ | |
b59d0bae NJ |
213 | } |
214 | ||
ea91e9b0 JK |
215 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
216 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
217 | f2fs_sbi_show, f2fs_sbi_store, \ | |
218 | offsetof(struct struct_name, elname)) | |
b59d0bae | 219 | |
8f1dbbbb SL |
220 | #define F2FS_GENERAL_RO_ATTR(name) \ |
221 | static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL) | |
222 | ||
ea91e9b0 JK |
223 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
224 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
225 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
226 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
227 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 228 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
bba681cb | 229 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); |
216fbd64 JK |
230 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
231 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 232 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 233 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
ea1a29a0 | 234 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); |
2304cb0c | 235 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); |
b1c57c1c | 236 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 237 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
6beceb54 | 238 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); |
d0239e1b | 239 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); |
8f1dbbbb | 240 | F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); |
b59d0bae NJ |
241 | |
242 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
243 | static struct attribute *f2fs_attrs[] = { | |
244 | ATTR_LIST(gc_min_sleep_time), | |
245 | ATTR_LIST(gc_max_sleep_time), | |
246 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 247 | ATTR_LIST(gc_idle), |
ea91e9b0 | 248 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 249 | ATTR_LIST(max_small_discards), |
bba681cb | 250 | ATTR_LIST(batched_trim_sections), |
216fbd64 JK |
251 | ATTR_LIST(ipu_policy), |
252 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 253 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 254 | ATTR_LIST(max_victim_search), |
ab9fa662 | 255 | ATTR_LIST(dir_level), |
cdfc41c1 | 256 | ATTR_LIST(ram_thresh), |
ea1a29a0 | 257 | ATTR_LIST(ra_nid_pages), |
2304cb0c | 258 | ATTR_LIST(dirty_nats_ratio), |
60b99b48 | 259 | ATTR_LIST(cp_interval), |
d0239e1b | 260 | ATTR_LIST(idle_interval), |
8f1dbbbb | 261 | ATTR_LIST(lifetime_write_kbytes), |
b59d0bae NJ |
262 | NULL, |
263 | }; | |
264 | ||
265 | static const struct sysfs_ops f2fs_attr_ops = { | |
266 | .show = f2fs_attr_show, | |
267 | .store = f2fs_attr_store, | |
268 | }; | |
269 | ||
270 | static struct kobj_type f2fs_ktype = { | |
271 | .default_attrs = f2fs_attrs, | |
272 | .sysfs_ops = &f2fs_attr_ops, | |
273 | .release = f2fs_sb_release, | |
274 | }; | |
275 | ||
a07ef784 NJ |
276 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
277 | { | |
278 | struct va_format vaf; | |
279 | va_list args; | |
280 | ||
281 | va_start(args, fmt); | |
282 | vaf.fmt = fmt; | |
283 | vaf.va = &args; | |
284 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
285 | va_end(args); | |
286 | } | |
287 | ||
aff063e2 JK |
288 | static void init_once(void *foo) |
289 | { | |
290 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
291 | ||
aff063e2 JK |
292 | inode_init_once(&fi->vfs_inode); |
293 | } | |
294 | ||
696c018c NJ |
295 | static int parse_options(struct super_block *sb, char *options) |
296 | { | |
297 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
09d54cdd | 298 | struct request_queue *q; |
696c018c NJ |
299 | substring_t args[MAX_OPT_ARGS]; |
300 | char *p, *name; | |
301 | int arg = 0; | |
302 | ||
303 | if (!options) | |
304 | return 0; | |
305 | ||
306 | while ((p = strsep(&options, ",")) != NULL) { | |
307 | int token; | |
308 | if (!*p) | |
309 | continue; | |
310 | /* | |
311 | * Initialize args struct so we know whether arg was | |
312 | * found; some options take optional arguments. | |
313 | */ | |
314 | args[0].to = args[0].from = NULL; | |
315 | token = match_token(p, f2fs_tokens, args); | |
316 | ||
317 | switch (token) { | |
318 | case Opt_gc_background: | |
319 | name = match_strdup(&args[0]); | |
320 | ||
321 | if (!name) | |
322 | return -ENOMEM; | |
6aefd93b | 323 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) { |
696c018c | 324 | set_opt(sbi, BG_GC); |
6aefd93b JK |
325 | clear_opt(sbi, FORCE_FG_GC); |
326 | } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) { | |
696c018c | 327 | clear_opt(sbi, BG_GC); |
6aefd93b JK |
328 | clear_opt(sbi, FORCE_FG_GC); |
329 | } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) { | |
330 | set_opt(sbi, BG_GC); | |
331 | set_opt(sbi, FORCE_FG_GC); | |
332 | } else { | |
696c018c NJ |
333 | kfree(name); |
334 | return -EINVAL; | |
335 | } | |
336 | kfree(name); | |
337 | break; | |
338 | case Opt_disable_roll_forward: | |
339 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
340 | break; | |
2d834bf9 JK |
341 | case Opt_norecovery: |
342 | /* this option mounts f2fs with ro */ | |
343 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
344 | if (!f2fs_readonly(sb)) | |
345 | return -EINVAL; | |
346 | break; | |
696c018c | 347 | case Opt_discard: |
09d54cdd CY |
348 | q = bdev_get_queue(sb->s_bdev); |
349 | if (blk_queue_discard(q)) { | |
350 | set_opt(sbi, DISCARD); | |
351 | } else { | |
352 | f2fs_msg(sb, KERN_WARNING, | |
353 | "mounting with \"discard\" option, but " | |
354 | "the device does not support discard"); | |
355 | } | |
696c018c NJ |
356 | break; |
357 | case Opt_noheap: | |
358 | set_opt(sbi, NOHEAP); | |
359 | break; | |
360 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
361 | case Opt_user_xattr: |
362 | set_opt(sbi, XATTR_USER); | |
363 | break; | |
696c018c NJ |
364 | case Opt_nouser_xattr: |
365 | clear_opt(sbi, XATTR_USER); | |
366 | break; | |
444c580f JK |
367 | case Opt_inline_xattr: |
368 | set_opt(sbi, INLINE_XATTR); | |
369 | break; | |
696c018c | 370 | #else |
4058c511 KA |
371 | case Opt_user_xattr: |
372 | f2fs_msg(sb, KERN_INFO, | |
373 | "user_xattr options not supported"); | |
374 | break; | |
696c018c NJ |
375 | case Opt_nouser_xattr: |
376 | f2fs_msg(sb, KERN_INFO, | |
377 | "nouser_xattr options not supported"); | |
378 | break; | |
444c580f JK |
379 | case Opt_inline_xattr: |
380 | f2fs_msg(sb, KERN_INFO, | |
381 | "inline_xattr options not supported"); | |
382 | break; | |
696c018c NJ |
383 | #endif |
384 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
385 | case Opt_acl: |
386 | set_opt(sbi, POSIX_ACL); | |
387 | break; | |
696c018c NJ |
388 | case Opt_noacl: |
389 | clear_opt(sbi, POSIX_ACL); | |
390 | break; | |
391 | #else | |
4058c511 KA |
392 | case Opt_acl: |
393 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
394 | break; | |
696c018c NJ |
395 | case Opt_noacl: |
396 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
397 | break; | |
398 | #endif | |
399 | case Opt_active_logs: | |
400 | if (args->from && match_int(args, &arg)) | |
401 | return -EINVAL; | |
402 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
403 | return -EINVAL; | |
404 | sbi->active_logs = arg; | |
405 | break; | |
406 | case Opt_disable_ext_identify: | |
407 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
408 | break; | |
8274de77 HL |
409 | case Opt_inline_data: |
410 | set_opt(sbi, INLINE_DATA); | |
411 | break; | |
5efd3c6f CY |
412 | case Opt_inline_dentry: |
413 | set_opt(sbi, INLINE_DENTRY); | |
414 | break; | |
6b4afdd7 JK |
415 | case Opt_flush_merge: |
416 | set_opt(sbi, FLUSH_MERGE); | |
417 | break; | |
0f7b2abd JK |
418 | case Opt_nobarrier: |
419 | set_opt(sbi, NOBARRIER); | |
420 | break; | |
d5053a34 JK |
421 | case Opt_fastboot: |
422 | set_opt(sbi, FASTBOOT); | |
423 | break; | |
89672159 CY |
424 | case Opt_extent_cache: |
425 | set_opt(sbi, EXTENT_CACHE); | |
426 | break; | |
7daaea25 JK |
427 | case Opt_noextent_cache: |
428 | clear_opt(sbi, EXTENT_CACHE); | |
429 | break; | |
75342797 WL |
430 | case Opt_noinline_data: |
431 | clear_opt(sbi, INLINE_DATA); | |
432 | break; | |
343f40f0 CY |
433 | case Opt_data_flush: |
434 | set_opt(sbi, DATA_FLUSH); | |
435 | break; | |
696c018c NJ |
436 | default: |
437 | f2fs_msg(sb, KERN_ERR, | |
438 | "Unrecognized mount option \"%s\" or missing value", | |
439 | p); | |
440 | return -EINVAL; | |
441 | } | |
442 | } | |
443 | return 0; | |
444 | } | |
445 | ||
aff063e2 JK |
446 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
447 | { | |
448 | struct f2fs_inode_info *fi; | |
449 | ||
a0acdfe0 | 450 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
451 | if (!fi) |
452 | return NULL; | |
453 | ||
454 | init_once((void *) fi); | |
455 | ||
434720fa | 456 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 457 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 458 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
459 | fi->i_current_depth = 1; |
460 | fi->i_advise = 0; | |
d928bfbf | 461 | init_rwsem(&fi->i_sem); |
2710fd7e | 462 | INIT_LIST_HEAD(&fi->dirty_list); |
88b88a66 JK |
463 | INIT_LIST_HEAD(&fi->inmem_pages); |
464 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
465 | |
466 | set_inode_flag(fi, FI_NEW_INODE); | |
467 | ||
444c580f JK |
468 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
469 | set_inode_flag(fi, FI_INLINE_XATTR); | |
470 | ||
ab9fa662 JK |
471 | /* Will be used by directory only */ |
472 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
aff063e2 JK |
473 | return &fi->vfs_inode; |
474 | } | |
475 | ||
531ad7d5 JK |
476 | static int f2fs_drop_inode(struct inode *inode) |
477 | { | |
478 | /* | |
479 | * This is to avoid a deadlock condition like below. | |
480 | * writeback_single_inode(inode) | |
481 | * - f2fs_write_data_page | |
482 | * - f2fs_gc -> iput -> evict | |
483 | * - inode_wait_for_writeback(inode) | |
484 | */ | |
06e1bc05 JK |
485 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
486 | if (!inode->i_nlink && !is_bad_inode(inode)) { | |
3e72f721 JK |
487 | /* to avoid evict_inode call simultaneously */ |
488 | atomic_inc(&inode->i_count); | |
06e1bc05 JK |
489 | spin_unlock(&inode->i_lock); |
490 | ||
491 | /* some remained atomic pages should discarded */ | |
492 | if (f2fs_is_atomic_file(inode)) | |
29b96b54 | 493 | drop_inmem_pages(inode); |
06e1bc05 | 494 | |
3e72f721 JK |
495 | /* should remain fi->extent_tree for writepage */ |
496 | f2fs_destroy_extent_node(inode); | |
497 | ||
06e1bc05 JK |
498 | sb_start_intwrite(inode->i_sb); |
499 | i_size_write(inode, 0); | |
500 | ||
501 | if (F2FS_HAS_BLOCKS(inode)) | |
55f57d2c | 502 | f2fs_truncate(inode, true); |
06e1bc05 JK |
503 | |
504 | sb_end_intwrite(inode->i_sb); | |
505 | ||
0b81d077 | 506 | fscrypt_put_encryption_info(inode, NULL); |
06e1bc05 | 507 | spin_lock(&inode->i_lock); |
3e72f721 | 508 | atomic_dec(&inode->i_count); |
06e1bc05 | 509 | } |
531ad7d5 | 510 | return 0; |
06e1bc05 | 511 | } |
531ad7d5 JK |
512 | return generic_drop_inode(inode); |
513 | } | |
514 | ||
b3783873 JK |
515 | /* |
516 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
517 | * | |
518 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
519 | */ | |
520 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
521 | { | |
522 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
523 | } |
524 | ||
aff063e2 JK |
525 | static void f2fs_i_callback(struct rcu_head *head) |
526 | { | |
527 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
528 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
529 | } | |
530 | ||
25ca923b | 531 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
532 | { |
533 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
534 | } | |
535 | ||
536 | static void f2fs_put_super(struct super_block *sb) | |
537 | { | |
538 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
539 | ||
5e176d54 JK |
540 | if (sbi->s_proc) { |
541 | remove_proc_entry("segment_info", sbi->s_proc); | |
542 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
543 | } | |
b59d0bae | 544 | kobject_del(&sbi->s_kobj); |
5e176d54 | 545 | |
aff063e2 JK |
546 | stop_gc_thread(sbi); |
547 | ||
2658e50d JK |
548 | /* prevent remaining shrinker jobs */ |
549 | mutex_lock(&sbi->umount_mutex); | |
550 | ||
85dc2f2c JK |
551 | /* |
552 | * We don't need to do checkpoint when superblock is clean. | |
553 | * But, the previous checkpoint was not done by umount, it needs to do | |
554 | * clean checkpoint again. | |
555 | */ | |
caf0047e | 556 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 557 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
558 | struct cp_control cpc = { |
559 | .reason = CP_UMOUNT, | |
560 | }; | |
561 | write_checkpoint(sbi, &cpc); | |
562 | } | |
aff063e2 | 563 | |
eca616f8 JK |
564 | /* write_checkpoint can update stat informaion */ |
565 | f2fs_destroy_stats(sbi); | |
566 | ||
cf779cab JK |
567 | /* |
568 | * normally superblock is clean, so we need to release this. | |
569 | * In addition, EIO will skip do checkpoint, we need this as well. | |
570 | */ | |
a49324f1 | 571 | release_ino_entry(sbi); |
4b2fecc8 | 572 | release_discard_addrs(sbi); |
6f12ac25 | 573 | |
2658e50d JK |
574 | f2fs_leave_shrinker(sbi); |
575 | mutex_unlock(&sbi->umount_mutex); | |
576 | ||
17c19120 | 577 | /* our cp_error case, we can wait for any writeback page */ |
406657dd CY |
578 | if (get_pages(sbi, F2FS_WRITEBACK)) |
579 | f2fs_flush_merged_bios(sbi); | |
17c19120 | 580 | |
aff063e2 JK |
581 | iput(sbi->node_inode); |
582 | iput(sbi->meta_inode); | |
583 | ||
584 | /* destroy f2fs internal modules */ | |
585 | destroy_node_manager(sbi); | |
586 | destroy_segment_manager(sbi); | |
587 | ||
588 | kfree(sbi->ckpt); | |
b59d0bae NJ |
589 | kobject_put(&sbi->s_kobj); |
590 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
591 | |
592 | sb->s_fs_info = NULL; | |
43b6573b KM |
593 | if (sbi->s_chksum_driver) |
594 | crypto_free_shash(sbi->s_chksum_driver); | |
b39f0de2 | 595 | kfree(sbi->raw_super); |
aff063e2 JK |
596 | kfree(sbi); |
597 | } | |
598 | ||
599 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
600 | { | |
601 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
c34f42e2 | 602 | int err = 0; |
aff063e2 | 603 | |
a2a4a7e4 NJ |
604 | trace_f2fs_sync_fs(sb, sync); |
605 | ||
b7473754 | 606 | if (sync) { |
d5053a34 JK |
607 | struct cp_control cpc; |
608 | ||
119ee914 JK |
609 | cpc.reason = __get_cp_reason(sbi); |
610 | ||
b7473754 | 611 | mutex_lock(&sbi->gc_mutex); |
c34f42e2 | 612 | err = write_checkpoint(sbi, &cpc); |
b7473754 | 613 | mutex_unlock(&sbi->gc_mutex); |
b7473754 | 614 | } |
05ca3632 | 615 | f2fs_trace_ios(NULL, 1); |
aff063e2 | 616 | |
c34f42e2 | 617 | return err; |
aff063e2 JK |
618 | } |
619 | ||
d6212a5f CL |
620 | static int f2fs_freeze(struct super_block *sb) |
621 | { | |
622 | int err; | |
623 | ||
77888c1e | 624 | if (f2fs_readonly(sb)) |
d6212a5f CL |
625 | return 0; |
626 | ||
627 | err = f2fs_sync_fs(sb, 1); | |
628 | return err; | |
629 | } | |
630 | ||
631 | static int f2fs_unfreeze(struct super_block *sb) | |
632 | { | |
633 | return 0; | |
634 | } | |
635 | ||
aff063e2 JK |
636 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
637 | { | |
638 | struct super_block *sb = dentry->d_sb; | |
639 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
640 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
641 | block_t total_count, user_block_count, start_count, ovp_count; | |
642 | ||
643 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
644 | user_block_count = sbi->user_block_count; | |
645 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
646 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
647 | buf->f_type = F2FS_SUPER_MAGIC; | |
648 | buf->f_bsize = sbi->blocksize; | |
649 | ||
650 | buf->f_blocks = total_count - start_count; | |
651 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
652 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
653 | ||
c200b1aa CY |
654 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
655 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 656 | |
5a20d339 | 657 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
658 | buf->f_fsid.val[0] = (u32)id; |
659 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
665 | { | |
666 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
667 | ||
6aefd93b JK |
668 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) { |
669 | if (test_opt(sbi, FORCE_FG_GC)) | |
670 | seq_printf(seq, ",background_gc=%s", "sync"); | |
671 | else | |
672 | seq_printf(seq, ",background_gc=%s", "on"); | |
673 | } else { | |
696c018c | 674 | seq_printf(seq, ",background_gc=%s", "off"); |
6aefd93b | 675 | } |
aff063e2 JK |
676 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
677 | seq_puts(seq, ",disable_roll_forward"); | |
678 | if (test_opt(sbi, DISCARD)) | |
679 | seq_puts(seq, ",discard"); | |
680 | if (test_opt(sbi, NOHEAP)) | |
681 | seq_puts(seq, ",no_heap_alloc"); | |
682 | #ifdef CONFIG_F2FS_FS_XATTR | |
683 | if (test_opt(sbi, XATTR_USER)) | |
684 | seq_puts(seq, ",user_xattr"); | |
685 | else | |
686 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
687 | if (test_opt(sbi, INLINE_XATTR)) |
688 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
689 | #endif |
690 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
691 | if (test_opt(sbi, POSIX_ACL)) | |
692 | seq_puts(seq, ",acl"); | |
693 | else | |
694 | seq_puts(seq, ",noacl"); | |
695 | #endif | |
696 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 697 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
698 | if (test_opt(sbi, INLINE_DATA)) |
699 | seq_puts(seq, ",inline_data"); | |
75342797 WL |
700 | else |
701 | seq_puts(seq, ",noinline_data"); | |
5efd3c6f CY |
702 | if (test_opt(sbi, INLINE_DENTRY)) |
703 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 704 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 705 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
706 | if (test_opt(sbi, NOBARRIER)) |
707 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
708 | if (test_opt(sbi, FASTBOOT)) |
709 | seq_puts(seq, ",fastboot"); | |
89672159 CY |
710 | if (test_opt(sbi, EXTENT_CACHE)) |
711 | seq_puts(seq, ",extent_cache"); | |
7daaea25 JK |
712 | else |
713 | seq_puts(seq, ",noextent_cache"); | |
343f40f0 CY |
714 | if (test_opt(sbi, DATA_FLUSH)) |
715 | seq_puts(seq, ",data_flush"); | |
aff063e2 JK |
716 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
5e176d54 JK |
721 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
722 | { | |
723 | struct super_block *sb = seq->private; | |
724 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
725 | unsigned int total_segs = |
726 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
727 | int i; |
728 | ||
90aa6dc9 CY |
729 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
730 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
731 | ||
5e176d54 | 732 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
733 | struct seg_entry *se = get_seg_entry(sbi, i); |
734 | ||
735 | if ((i % 10) == 0) | |
01a5ad82 | 736 | seq_printf(seq, "%-10d", i); |
90aa6dc9 CY |
737 | seq_printf(seq, "%d|%-3u", se->type, |
738 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
739 | if ((i % 10) == 9 || i == (total_segs - 1)) |
740 | seq_putc(seq, '\n'); | |
5e176d54 | 741 | else |
46c04366 | 742 | seq_putc(seq, ' '); |
5e176d54 | 743 | } |
46c04366 | 744 | |
5e176d54 JK |
745 | return 0; |
746 | } | |
747 | ||
748 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
749 | { | |
750 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
751 | } | |
752 | ||
753 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
754 | .owner = THIS_MODULE, | |
755 | .open = segment_info_open_fs, | |
756 | .read = seq_read, | |
757 | .llseek = seq_lseek, | |
758 | .release = single_release, | |
759 | }; | |
760 | ||
498c5e9f YH |
761 | static void default_options(struct f2fs_sb_info *sbi) |
762 | { | |
763 | /* init some FS parameters */ | |
764 | sbi->active_logs = NR_CURSEG_TYPE; | |
765 | ||
766 | set_opt(sbi, BG_GC); | |
767 | set_opt(sbi, INLINE_DATA); | |
3e72f721 | 768 | set_opt(sbi, EXTENT_CACHE); |
498c5e9f YH |
769 | |
770 | #ifdef CONFIG_F2FS_FS_XATTR | |
771 | set_opt(sbi, XATTR_USER); | |
772 | #endif | |
773 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
774 | set_opt(sbi, POSIX_ACL); | |
775 | #endif | |
776 | } | |
777 | ||
696c018c NJ |
778 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
779 | { | |
780 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
781 | struct f2fs_mount_info org_mount_opt; | |
782 | int err, active_logs; | |
876dc59e GZ |
783 | bool need_restart_gc = false; |
784 | bool need_stop_gc = false; | |
9cd81ce3 | 785 | bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE); |
696c018c NJ |
786 | |
787 | /* | |
788 | * Save the old mount options in case we | |
789 | * need to restore them. | |
790 | */ | |
791 | org_mount_opt = sbi->mount_opt; | |
792 | active_logs = sbi->active_logs; | |
793 | ||
8f1dbbbb SL |
794 | if (*flags & MS_RDONLY) { |
795 | set_opt(sbi, FASTBOOT); | |
796 | set_sbi_flag(sbi, SBI_IS_DIRTY); | |
797 | } | |
798 | ||
799 | sync_filesystem(sb); | |
800 | ||
26666c8a | 801 | sbi->mount_opt.opt = 0; |
498c5e9f | 802 | default_options(sbi); |
26666c8a | 803 | |
696c018c NJ |
804 | /* parse mount options */ |
805 | err = parse_options(sb, data); | |
806 | if (err) | |
807 | goto restore_opts; | |
808 | ||
809 | /* | |
810 | * Previous and new state of filesystem is RO, | |
876dc59e | 811 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 812 | */ |
6b2920a5 | 813 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
814 | goto skip; |
815 | ||
9cd81ce3 CY |
816 | /* disallow enable/disable extent_cache dynamically */ |
817 | if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) { | |
818 | err = -EINVAL; | |
819 | f2fs_msg(sbi->sb, KERN_WARNING, | |
820 | "switch extent_cache option is not allowed"); | |
821 | goto restore_opts; | |
822 | } | |
823 | ||
696c018c NJ |
824 | /* |
825 | * We stop the GC thread if FS is mounted as RO | |
826 | * or if background_gc = off is passed in mount | |
827 | * option. Also sync the filesystem. | |
828 | */ | |
829 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
830 | if (sbi->gc_thread) { | |
831 | stop_gc_thread(sbi); | |
832 | f2fs_sync_fs(sb, 1); | |
876dc59e | 833 | need_restart_gc = true; |
696c018c | 834 | } |
aba291b3 | 835 | } else if (!sbi->gc_thread) { |
696c018c NJ |
836 | err = start_gc_thread(sbi); |
837 | if (err) | |
838 | goto restore_opts; | |
876dc59e GZ |
839 | need_stop_gc = true; |
840 | } | |
841 | ||
842 | /* | |
843 | * We stop issue flush thread if FS is mounted as RO | |
844 | * or if flush_merge is not passed in mount option. | |
845 | */ | |
846 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 847 | destroy_flush_cmd_control(sbi); |
aba291b3 | 848 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
849 | err = create_flush_cmd_control(sbi); |
850 | if (err) | |
a688b9d9 | 851 | goto restore_gc; |
696c018c NJ |
852 | } |
853 | skip: | |
854 | /* Update the POSIXACL Flag */ | |
855 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
856 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
857 | return 0; | |
876dc59e GZ |
858 | restore_gc: |
859 | if (need_restart_gc) { | |
860 | if (start_gc_thread(sbi)) | |
861 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 862 | "background gc thread has stopped"); |
876dc59e GZ |
863 | } else if (need_stop_gc) { |
864 | stop_gc_thread(sbi); | |
865 | } | |
696c018c NJ |
866 | restore_opts: |
867 | sbi->mount_opt = org_mount_opt; | |
868 | sbi->active_logs = active_logs; | |
869 | return err; | |
870 | } | |
871 | ||
aff063e2 JK |
872 | static struct super_operations f2fs_sops = { |
873 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 874 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
875 | .destroy_inode = f2fs_destroy_inode, |
876 | .write_inode = f2fs_write_inode, | |
b3783873 | 877 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
878 | .show_options = f2fs_show_options, |
879 | .evict_inode = f2fs_evict_inode, | |
880 | .put_super = f2fs_put_super, | |
881 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
882 | .freeze_fs = f2fs_freeze, |
883 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 884 | .statfs = f2fs_statfs, |
696c018c | 885 | .remount_fs = f2fs_remount, |
aff063e2 JK |
886 | }; |
887 | ||
0b81d077 JK |
888 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
889 | static int f2fs_get_context(struct inode *inode, void *ctx, size_t len) | |
890 | { | |
891 | return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION, | |
892 | F2FS_XATTR_NAME_ENCRYPTION_CONTEXT, | |
893 | ctx, len, NULL); | |
894 | } | |
895 | ||
896 | static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len, | |
897 | void *fs_data) | |
898 | { | |
899 | return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION, | |
900 | F2FS_XATTR_NAME_ENCRYPTION_CONTEXT, | |
901 | ctx, len, fs_data, XATTR_CREATE); | |
902 | } | |
903 | ||
904 | static unsigned f2fs_max_namelen(struct inode *inode) | |
905 | { | |
906 | return S_ISLNK(inode->i_mode) ? | |
907 | inode->i_sb->s_blocksize : F2FS_NAME_LEN; | |
908 | } | |
909 | ||
910 | static struct fscrypt_operations f2fs_cryptops = { | |
911 | .get_context = f2fs_get_context, | |
912 | .set_context = f2fs_set_context, | |
913 | .is_encrypted = f2fs_encrypted_inode, | |
914 | .empty_dir = f2fs_empty_dir, | |
915 | .max_namelen = f2fs_max_namelen, | |
916 | }; | |
917 | #else | |
918 | static struct fscrypt_operations f2fs_cryptops = { | |
919 | .is_encrypted = f2fs_encrypted_inode, | |
920 | }; | |
921 | #endif | |
922 | ||
aff063e2 JK |
923 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, |
924 | u64 ino, u32 generation) | |
925 | { | |
926 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
927 | struct inode *inode; | |
928 | ||
d6b7d4b3 | 929 | if (check_nid_range(sbi, ino)) |
910bb12d | 930 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
931 | |
932 | /* | |
933 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
934 | * However f2fs_iget currently does appropriate checks to handle stale | |
935 | * inodes so everything is OK. | |
936 | */ | |
937 | inode = f2fs_iget(sb, ino); | |
938 | if (IS_ERR(inode)) | |
939 | return ERR_CAST(inode); | |
6bacf52f | 940 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
941 | /* we didn't find the right inode.. */ |
942 | iput(inode); | |
943 | return ERR_PTR(-ESTALE); | |
944 | } | |
945 | return inode; | |
946 | } | |
947 | ||
948 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
949 | int fh_len, int fh_type) | |
950 | { | |
951 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
952 | f2fs_nfs_get_inode); | |
953 | } | |
954 | ||
955 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
956 | int fh_len, int fh_type) | |
957 | { | |
958 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
959 | f2fs_nfs_get_inode); | |
960 | } | |
961 | ||
962 | static const struct export_operations f2fs_export_ops = { | |
963 | .fh_to_dentry = f2fs_fh_to_dentry, | |
964 | .fh_to_parent = f2fs_fh_to_parent, | |
965 | .get_parent = f2fs_get_parent, | |
966 | }; | |
967 | ||
e0afc4d6 | 968 | static loff_t max_file_blocks(void) |
aff063e2 | 969 | { |
de93653f | 970 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
971 | loff_t leaf_count = ADDRS_PER_BLOCK; |
972 | ||
973 | /* two direct node blocks */ | |
974 | result += (leaf_count * 2); | |
975 | ||
976 | /* two indirect node blocks */ | |
977 | leaf_count *= NIDS_PER_BLOCK; | |
978 | result += (leaf_count * 2); | |
979 | ||
980 | /* one double indirect node block */ | |
981 | leaf_count *= NIDS_PER_BLOCK; | |
982 | result += leaf_count; | |
983 | ||
aff063e2 JK |
984 | return result; |
985 | } | |
986 | ||
9a59b62f CY |
987 | static inline bool sanity_check_area_boundary(struct super_block *sb, |
988 | struct f2fs_super_block *raw_super) | |
989 | { | |
990 | u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); | |
991 | u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr); | |
992 | u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr); | |
993 | u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr); | |
994 | u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
995 | u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
996 | u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt); | |
997 | u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit); | |
998 | u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat); | |
999 | u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa); | |
1000 | u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main); | |
1001 | u32 segment_count = le32_to_cpu(raw_super->segment_count); | |
1002 | u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
1003 | ||
1004 | if (segment0_blkaddr != cp_blkaddr) { | |
1005 | f2fs_msg(sb, KERN_INFO, | |
1006 | "Mismatch start address, segment0(%u) cp_blkaddr(%u)", | |
1007 | segment0_blkaddr, cp_blkaddr); | |
1008 | return true; | |
1009 | } | |
1010 | ||
1011 | if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) != | |
1012 | sit_blkaddr) { | |
1013 | f2fs_msg(sb, KERN_INFO, | |
1014 | "Wrong CP boundary, start(%u) end(%u) blocks(%u)", | |
1015 | cp_blkaddr, sit_blkaddr, | |
1016 | segment_count_ckpt << log_blocks_per_seg); | |
1017 | return true; | |
1018 | } | |
1019 | ||
1020 | if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) != | |
1021 | nat_blkaddr) { | |
1022 | f2fs_msg(sb, KERN_INFO, | |
1023 | "Wrong SIT boundary, start(%u) end(%u) blocks(%u)", | |
1024 | sit_blkaddr, nat_blkaddr, | |
1025 | segment_count_sit << log_blocks_per_seg); | |
1026 | return true; | |
1027 | } | |
1028 | ||
1029 | if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) != | |
1030 | ssa_blkaddr) { | |
1031 | f2fs_msg(sb, KERN_INFO, | |
1032 | "Wrong NAT boundary, start(%u) end(%u) blocks(%u)", | |
1033 | nat_blkaddr, ssa_blkaddr, | |
1034 | segment_count_nat << log_blocks_per_seg); | |
1035 | return true; | |
1036 | } | |
1037 | ||
1038 | if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) != | |
1039 | main_blkaddr) { | |
1040 | f2fs_msg(sb, KERN_INFO, | |
1041 | "Wrong SSA boundary, start(%u) end(%u) blocks(%u)", | |
1042 | ssa_blkaddr, main_blkaddr, | |
1043 | segment_count_ssa << log_blocks_per_seg); | |
1044 | return true; | |
1045 | } | |
1046 | ||
1047 | if (main_blkaddr + (segment_count_main << log_blocks_per_seg) != | |
1048 | segment0_blkaddr + (segment_count << log_blocks_per_seg)) { | |
1049 | f2fs_msg(sb, KERN_INFO, | |
1050 | "Wrong MAIN_AREA boundary, start(%u) end(%u) blocks(%u)", | |
1051 | main_blkaddr, | |
1052 | segment0_blkaddr + (segment_count << log_blocks_per_seg), | |
1053 | segment_count_main << log_blocks_per_seg); | |
1054 | return true; | |
1055 | } | |
1056 | ||
1057 | return false; | |
1058 | } | |
1059 | ||
a07ef784 NJ |
1060 | static int sanity_check_raw_super(struct super_block *sb, |
1061 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
1062 | { |
1063 | unsigned int blocksize; | |
1064 | ||
a07ef784 NJ |
1065 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
1066 | f2fs_msg(sb, KERN_INFO, | |
1067 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
1068 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 1069 | return 1; |
a07ef784 | 1070 | } |
aff063e2 | 1071 | |
5c9b4692 | 1072 | /* Currently, support only 4KB page cache size */ |
1073 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
1074 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 1075 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 1076 | PAGE_CACHE_SIZE); |
1077 | return 1; | |
1078 | } | |
1079 | ||
aff063e2 JK |
1080 | /* Currently, support only 4KB block size */ |
1081 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 1082 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
1083 | f2fs_msg(sb, KERN_INFO, |
1084 | "Invalid blocksize (%u), supports only 4KB\n", | |
1085 | blocksize); | |
aff063e2 | 1086 | return 1; |
a07ef784 | 1087 | } |
5c9b4692 | 1088 | |
9a59b62f CY |
1089 | /* check log blocks per segment */ |
1090 | if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) { | |
1091 | f2fs_msg(sb, KERN_INFO, | |
1092 | "Invalid log blocks per segment (%u)\n", | |
1093 | le32_to_cpu(raw_super->log_blocks_per_seg)); | |
1094 | return 1; | |
1095 | } | |
1096 | ||
55cf9cb6 CY |
1097 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
1098 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
1099 | F2FS_MAX_LOG_SECTOR_SIZE || | |
1100 | le32_to_cpu(raw_super->log_sectorsize) < | |
1101 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
1102 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
1103 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 1104 | return 1; |
a07ef784 | 1105 | } |
55cf9cb6 CY |
1106 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
1107 | le32_to_cpu(raw_super->log_sectorsize) != | |
1108 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
1109 | f2fs_msg(sb, KERN_INFO, | |
1110 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
1111 | le32_to_cpu(raw_super->log_sectors_per_block), | |
1112 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 1113 | return 1; |
a07ef784 | 1114 | } |
9a59b62f CY |
1115 | |
1116 | /* check reserved ino info */ | |
1117 | if (le32_to_cpu(raw_super->node_ino) != 1 || | |
1118 | le32_to_cpu(raw_super->meta_ino) != 2 || | |
1119 | le32_to_cpu(raw_super->root_ino) != 3) { | |
1120 | f2fs_msg(sb, KERN_INFO, | |
1121 | "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)", | |
1122 | le32_to_cpu(raw_super->node_ino), | |
1123 | le32_to_cpu(raw_super->meta_ino), | |
1124 | le32_to_cpu(raw_super->root_ino)); | |
1125 | return 1; | |
1126 | } | |
1127 | ||
1128 | /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */ | |
1129 | if (sanity_check_area_boundary(sb, raw_super)) | |
1130 | return 1; | |
1131 | ||
aff063e2 JK |
1132 | return 0; |
1133 | } | |
1134 | ||
984ec63c | 1135 | int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
1136 | { |
1137 | unsigned int total, fsmeta; | |
577e3495 JK |
1138 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
1139 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
1140 | |
1141 | total = le32_to_cpu(raw_super->segment_count); | |
1142 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
1143 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
1144 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
1145 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
1146 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
1147 | ||
6bacf52f | 1148 | if (unlikely(fsmeta >= total)) |
aff063e2 | 1149 | return 1; |
577e3495 | 1150 | |
1e968fdf | 1151 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
1152 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
1153 | return 1; | |
1154 | } | |
aff063e2 JK |
1155 | return 0; |
1156 | } | |
1157 | ||
1158 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
1159 | { | |
1160 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
1161 | int i; | |
1162 | ||
1163 | sbi->log_sectors_per_block = | |
1164 | le32_to_cpu(raw_super->log_sectors_per_block); | |
1165 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
1166 | sbi->blocksize = 1 << sbi->log_blocksize; | |
1167 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
1168 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
1169 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
1170 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
1171 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
1172 | sbi->total_node_count = | |
1173 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
1174 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
1175 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
1176 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
1177 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 1178 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 1179 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
1180 | |
1181 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
1182 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
1183 | |
1184 | sbi->dir_level = DEF_DIR_LEVEL; | |
6beceb54 | 1185 | sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL; |
d0239e1b | 1186 | sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL; |
caf0047e | 1187 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
2658e50d JK |
1188 | |
1189 | INIT_LIST_HEAD(&sbi->s_list); | |
1190 | mutex_init(&sbi->umount_mutex); | |
aff063e2 JK |
1191 | } |
1192 | ||
9076a75f GZ |
1193 | /* |
1194 | * Read f2fs raw super block. | |
2b39e907 SL |
1195 | * Because we have two copies of super block, so read both of them |
1196 | * to get the first valid one. If any one of them is broken, we pass | |
1197 | * them recovery flag back to the caller. | |
9076a75f GZ |
1198 | */ |
1199 | static int read_raw_super_block(struct super_block *sb, | |
1200 | struct f2fs_super_block **raw_super, | |
e8240f65 | 1201 | int *valid_super_block, int *recovery) |
14d7e9de | 1202 | { |
2b39e907 | 1203 | int block; |
e8240f65 CY |
1204 | struct buffer_head *bh; |
1205 | struct f2fs_super_block *super, *buf; | |
da554e48 | 1206 | int err = 0; |
14d7e9de | 1207 | |
b39f0de2 YH |
1208 | super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL); |
1209 | if (!super) | |
1210 | return -ENOMEM; | |
2b39e907 SL |
1211 | |
1212 | for (block = 0; block < 2; block++) { | |
1213 | bh = sb_bread(sb, block); | |
1214 | if (!bh) { | |
1215 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", | |
9076a75f | 1216 | block + 1); |
2b39e907 SL |
1217 | err = -EIO; |
1218 | continue; | |
1219 | } | |
14d7e9de | 1220 | |
2b39e907 SL |
1221 | buf = (struct f2fs_super_block *) |
1222 | (bh->b_data + F2FS_SUPER_OFFSET); | |
14d7e9de | 1223 | |
2b39e907 SL |
1224 | /* sanity checking of raw super */ |
1225 | if (sanity_check_raw_super(sb, buf)) { | |
1226 | f2fs_msg(sb, KERN_ERR, | |
1227 | "Can't find valid F2FS filesystem in %dth superblock", | |
1228 | block + 1); | |
1229 | err = -EINVAL; | |
1230 | brelse(bh); | |
1231 | continue; | |
1232 | } | |
14d7e9de | 1233 | |
2b39e907 SL |
1234 | if (!*raw_super) { |
1235 | memcpy(super, buf, sizeof(*super)); | |
1236 | *valid_super_block = block; | |
1237 | *raw_super = super; | |
1238 | } | |
1239 | brelse(bh); | |
da554e48 | 1240 | } |
1241 | ||
2b39e907 SL |
1242 | /* Fail to read any one of the superblocks*/ |
1243 | if (err < 0) | |
1244 | *recovery = 1; | |
da554e48 | 1245 | |
da554e48 | 1246 | /* No valid superblock */ |
2b39e907 | 1247 | if (!*raw_super) |
b39f0de2 | 1248 | kfree(super); |
2b39e907 SL |
1249 | else |
1250 | err = 0; | |
da554e48 | 1251 | |
2b39e907 | 1252 | return err; |
14d7e9de | 1253 | } |
1254 | ||
06d6f226 | 1255 | static int __f2fs_commit_super(struct f2fs_sb_info *sbi, int block) |
26d815ad | 1256 | { |
b39f0de2 | 1257 | struct f2fs_super_block *super = F2FS_RAW_SUPER(sbi); |
5d909cdb | 1258 | struct buffer_head *bh; |
26d815ad JK |
1259 | int err; |
1260 | ||
b3980910 | 1261 | bh = sb_getblk(sbi->sb, block); |
5d909cdb JK |
1262 | if (!bh) |
1263 | return -EIO; | |
26d815ad | 1264 | |
5d909cdb | 1265 | lock_buffer(bh); |
b39f0de2 | 1266 | memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super)); |
5d909cdb JK |
1267 | set_buffer_uptodate(bh); |
1268 | set_buffer_dirty(bh); | |
1269 | unlock_buffer(bh); | |
1270 | ||
1271 | /* it's rare case, we can do fua all the time */ | |
1272 | err = __sync_dirty_buffer(bh, WRITE_FLUSH_FUA); | |
1273 | brelse(bh); | |
c5bda1c8 | 1274 | |
b3980910 CY |
1275 | return err; |
1276 | } | |
1277 | ||
1278 | int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) | |
1279 | { | |
1280 | int err; | |
1281 | ||
1282 | /* write back-up superblock first */ | |
1283 | err = __f2fs_commit_super(sbi, sbi->valid_super_block ? 0 : 1); | |
1284 | ||
c5bda1c8 CY |
1285 | /* if we are in recovery path, skip writing valid superblock */ |
1286 | if (recover || err) | |
5d909cdb | 1287 | return err; |
26d815ad JK |
1288 | |
1289 | /* write current valid superblock */ | |
b3980910 | 1290 | return __f2fs_commit_super(sbi, sbi->valid_super_block); |
26d815ad JK |
1291 | } |
1292 | ||
aff063e2 JK |
1293 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
1294 | { | |
1295 | struct f2fs_sb_info *sbi; | |
da554e48 | 1296 | struct f2fs_super_block *raw_super; |
aff063e2 | 1297 | struct inode *root; |
da554e48 | 1298 | long err; |
2adc3505 | 1299 | bool retry = true, need_fsck = false; |
dabc4a5c | 1300 | char *options = NULL; |
e8240f65 | 1301 | int recovery, i, valid_super_block; |
8f1dbbbb | 1302 | struct curseg_info *seg_i; |
aff063e2 | 1303 | |
ed2e621a | 1304 | try_onemore: |
da554e48 | 1305 | err = -EINVAL; |
1306 | raw_super = NULL; | |
e8240f65 | 1307 | valid_super_block = -1; |
da554e48 | 1308 | recovery = 0; |
1309 | ||
aff063e2 JK |
1310 | /* allocate memory for f2fs-specific super block info */ |
1311 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
1312 | if (!sbi) | |
1313 | return -ENOMEM; | |
1314 | ||
43b6573b KM |
1315 | /* Load the checksum driver */ |
1316 | sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0); | |
1317 | if (IS_ERR(sbi->s_chksum_driver)) { | |
1318 | f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver."); | |
1319 | err = PTR_ERR(sbi->s_chksum_driver); | |
1320 | sbi->s_chksum_driver = NULL; | |
1321 | goto free_sbi; | |
1322 | } | |
1323 | ||
ff9234ad | 1324 | /* set a block size */ |
6bacf52f | 1325 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 1326 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 1327 | goto free_sbi; |
a07ef784 | 1328 | } |
aff063e2 | 1329 | |
e8240f65 CY |
1330 | err = read_raw_super_block(sb, &raw_super, &valid_super_block, |
1331 | &recovery); | |
9076a75f GZ |
1332 | if (err) |
1333 | goto free_sbi; | |
1334 | ||
5fb08372 | 1335 | sb->s_fs_info = sbi; |
498c5e9f | 1336 | default_options(sbi); |
aff063e2 | 1337 | /* parse mount options */ |
dabc4a5c JK |
1338 | options = kstrdup((const char *)data, GFP_KERNEL); |
1339 | if (data && !options) { | |
1340 | err = -ENOMEM; | |
aff063e2 | 1341 | goto free_sb_buf; |
dabc4a5c JK |
1342 | } |
1343 | ||
1344 | err = parse_options(sb, options); | |
1345 | if (err) | |
1346 | goto free_options; | |
aff063e2 | 1347 | |
e0afc4d6 CY |
1348 | sbi->max_file_blocks = max_file_blocks(); |
1349 | sb->s_maxbytes = sbi->max_file_blocks << | |
1350 | le32_to_cpu(raw_super->log_blocksize); | |
aff063e2 JK |
1351 | sb->s_max_links = F2FS_LINK_MAX; |
1352 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1353 | ||
1354 | sb->s_op = &f2fs_sops; | |
0b81d077 | 1355 | sb->s_cop = &f2fs_cryptops; |
aff063e2 JK |
1356 | sb->s_xattr = f2fs_xattr_handlers; |
1357 | sb->s_export_op = &f2fs_export_ops; | |
1358 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1359 | sb->s_time_gran = 1; |
1360 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1361 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1362 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1363 | ||
1364 | /* init f2fs-specific super block info */ | |
1365 | sbi->sb = sb; | |
1366 | sbi->raw_super = raw_super; | |
e8240f65 | 1367 | sbi->valid_super_block = valid_super_block; |
aff063e2 | 1368 | mutex_init(&sbi->gc_mutex); |
5463e7c1 | 1369 | mutex_init(&sbi->writepages); |
aff063e2 | 1370 | mutex_init(&sbi->cp_mutex); |
b3582c68 | 1371 | init_rwsem(&sbi->node_write); |
315df839 JK |
1372 | |
1373 | /* disallow all the data/node/meta page writes */ | |
1374 | set_sbi_flag(sbi, SBI_POR_DOING); | |
aff063e2 | 1375 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1376 | |
df0f8dc0 | 1377 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1378 | sbi->read_io.sbi = sbi; |
1379 | sbi->read_io.bio = NULL; | |
1380 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1381 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1382 | sbi->write_io[i].sbi = sbi; |
1383 | sbi->write_io[i].bio = NULL; | |
1384 | } | |
971767ca | 1385 | |
e479556b | 1386 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1387 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1388 | init_sb_info(sbi); |
1389 | ||
1390 | /* get an inode for meta space */ | |
1391 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1392 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1393 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1394 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1395 | goto free_options; |
aff063e2 JK |
1396 | } |
1397 | ||
1398 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1399 | if (err) { |
1400 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1401 | goto free_meta_inode; |
a07ef784 | 1402 | } |
aff063e2 | 1403 | |
aff063e2 JK |
1404 | sbi->total_valid_node_count = |
1405 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1406 | sbi->total_valid_inode_count = | |
1407 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1408 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1409 | sbi->total_valid_block_count = | |
1410 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1411 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1412 | sbi->alloc_valid_block_count = 0; | |
c227f912 CY |
1413 | for (i = 0; i < NR_INODE_TYPE; i++) { |
1414 | INIT_LIST_HEAD(&sbi->inode_list[i]); | |
1415 | spin_lock_init(&sbi->inode_lock[i]); | |
1416 | } | |
aff063e2 | 1417 | |
1dcc336b CY |
1418 | init_extent_cache_info(sbi); |
1419 | ||
6451e041 | 1420 | init_ino_entry_info(sbi); |
aff063e2 JK |
1421 | |
1422 | /* setup f2fs internal modules */ | |
1423 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1424 | if (err) { |
1425 | f2fs_msg(sb, KERN_ERR, | |
1426 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1427 | goto free_sm; |
a07ef784 | 1428 | } |
aff063e2 | 1429 | err = build_node_manager(sbi); |
a07ef784 NJ |
1430 | if (err) { |
1431 | f2fs_msg(sb, KERN_ERR, | |
1432 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1433 | goto free_nm; |
a07ef784 | 1434 | } |
aff063e2 | 1435 | |
8f1dbbbb SL |
1436 | /* For write statistics */ |
1437 | if (sb->s_bdev->bd_part) | |
1438 | sbi->sectors_written_start = | |
1439 | (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
1440 | ||
1441 | /* Read accumulated write IO statistics if exists */ | |
1442 | seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE); | |
1443 | if (__exist_node_summaries(sbi)) | |
1444 | sbi->kbytes_written = | |
dfc08a12 | 1445 | le64_to_cpu(seg_i->sum_blk->journal.info.kbytes_written); |
8f1dbbbb | 1446 | |
aff063e2 JK |
1447 | build_gc_manager(sbi); |
1448 | ||
1449 | /* get an inode for node space */ | |
1450 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1451 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1452 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1453 | err = PTR_ERR(sbi->node_inode); |
1454 | goto free_nm; | |
1455 | } | |
1456 | ||
2658e50d JK |
1457 | f2fs_join_shrinker(sbi); |
1458 | ||
aff063e2 | 1459 | /* if there are nt orphan nodes free them */ |
8c14bfad CY |
1460 | err = recover_orphan_inodes(sbi); |
1461 | if (err) | |
1462 | goto free_node_inode; | |
aff063e2 JK |
1463 | |
1464 | /* read root inode and dentry */ | |
1465 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1466 | if (IS_ERR(root)) { | |
a07ef784 | 1467 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1468 | err = PTR_ERR(root); |
1469 | goto free_node_inode; | |
1470 | } | |
8f99a946 | 1471 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1472 | iput(root); |
8f99a946 | 1473 | err = -EINVAL; |
9d847950 | 1474 | goto free_node_inode; |
8f99a946 | 1475 | } |
aff063e2 JK |
1476 | |
1477 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1478 | if (!sb->s_root) { | |
1479 | err = -ENOMEM; | |
1480 | goto free_root_inode; | |
1481 | } | |
1482 | ||
aff063e2 JK |
1483 | err = f2fs_build_stats(sbi); |
1484 | if (err) | |
6437d1b0 | 1485 | goto free_root_inode; |
aff063e2 | 1486 | |
5e176d54 JK |
1487 | if (f2fs_proc_root) |
1488 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1489 | ||
1490 | if (sbi->s_proc) | |
1491 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1492 | &f2fs_seq_segment_info_fops, sb); | |
1493 | ||
b59d0bae NJ |
1494 | sbi->s_kobj.kset = f2fs_kset; |
1495 | init_completion(&sbi->s_kobj_unregister); | |
1496 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1497 | "%s", sb->s_id); | |
1498 | if (err) | |
6437d1b0 | 1499 | goto free_proc; |
b59d0bae | 1500 | |
6437d1b0 JK |
1501 | /* recover fsynced data */ |
1502 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
081d78c2 JK |
1503 | /* |
1504 | * mount should be failed, when device has readonly mode, and | |
1505 | * previous checkpoint was not done by clean system shutdown. | |
1506 | */ | |
1507 | if (bdev_read_only(sb->s_bdev) && | |
1508 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { | |
1509 | err = -EROFS; | |
1510 | goto free_kobj; | |
1511 | } | |
2adc3505 CY |
1512 | |
1513 | if (need_fsck) | |
1514 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
1515 | ||
6437d1b0 | 1516 | err = recover_fsync_data(sbi); |
ed2e621a | 1517 | if (err) { |
2adc3505 | 1518 | need_fsck = true; |
6437d1b0 JK |
1519 | f2fs_msg(sb, KERN_ERR, |
1520 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1521 | goto free_kobj; |
1522 | } | |
6437d1b0 | 1523 | } |
315df839 JK |
1524 | /* recover_fsync_data() cleared this already */ |
1525 | clear_sbi_flag(sbi, SBI_POR_DOING); | |
b59d0bae | 1526 | |
6437d1b0 JK |
1527 | /* |
1528 | * If filesystem is not mounted as read-only then | |
1529 | * do start the gc_thread. | |
1530 | */ | |
6c029932 | 1531 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1532 | /* After POR, we can run background GC thread.*/ |
1533 | err = start_gc_thread(sbi); | |
1534 | if (err) | |
1535 | goto free_kobj; | |
1536 | } | |
dabc4a5c | 1537 | kfree(options); |
da554e48 | 1538 | |
1539 | /* recover broken superblock */ | |
1540 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { | |
41214b3c CY |
1541 | err = f2fs_commit_super(sbi, true); |
1542 | f2fs_msg(sb, KERN_INFO, | |
1543 | "Try to recover %dth superblock, ret: %ld", | |
1544 | sbi->valid_super_block ? 1 : 2, err); | |
da554e48 | 1545 | } |
1546 | ||
6beceb54 | 1547 | f2fs_update_time(sbi, CP_TIME); |
d0239e1b | 1548 | f2fs_update_time(sbi, REQ_TIME); |
aff063e2 | 1549 | return 0; |
6437d1b0 JK |
1550 | |
1551 | free_kobj: | |
1552 | kobject_del(&sbi->s_kobj); | |
29ba108d CY |
1553 | kobject_put(&sbi->s_kobj); |
1554 | wait_for_completion(&sbi->s_kobj_unregister); | |
6437d1b0 | 1555 | free_proc: |
1d15bd20 CY |
1556 | if (sbi->s_proc) { |
1557 | remove_proc_entry("segment_info", sbi->s_proc); | |
1558 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1559 | } | |
1560 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1561 | free_root_inode: |
1562 | dput(sb->s_root); | |
1563 | sb->s_root = NULL; | |
1564 | free_node_inode: | |
2658e50d JK |
1565 | mutex_lock(&sbi->umount_mutex); |
1566 | f2fs_leave_shrinker(sbi); | |
aff063e2 | 1567 | iput(sbi->node_inode); |
2658e50d | 1568 | mutex_unlock(&sbi->umount_mutex); |
aff063e2 JK |
1569 | free_nm: |
1570 | destroy_node_manager(sbi); | |
1571 | free_sm: | |
1572 | destroy_segment_manager(sbi); | |
aff063e2 JK |
1573 | kfree(sbi->ckpt); |
1574 | free_meta_inode: | |
1575 | make_bad_inode(sbi->meta_inode); | |
1576 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1577 | free_options: |
1578 | kfree(options); | |
aff063e2 | 1579 | free_sb_buf: |
b39f0de2 | 1580 | kfree(raw_super); |
aff063e2 | 1581 | free_sbi: |
43b6573b KM |
1582 | if (sbi->s_chksum_driver) |
1583 | crypto_free_shash(sbi->s_chksum_driver); | |
aff063e2 | 1584 | kfree(sbi); |
ed2e621a JK |
1585 | |
1586 | /* give only one another chance */ | |
1587 | if (retry) { | |
9df47ba7 | 1588 | retry = false; |
ed2e621a JK |
1589 | shrink_dcache_sb(sb); |
1590 | goto try_onemore; | |
1591 | } | |
aff063e2 JK |
1592 | return err; |
1593 | } | |
1594 | ||
1595 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1596 | const char *dev_name, void *data) | |
1597 | { | |
1598 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1599 | } | |
1600 | ||
30a5537f JK |
1601 | static void kill_f2fs_super(struct super_block *sb) |
1602 | { | |
1603 | if (sb->s_root) | |
caf0047e | 1604 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1605 | kill_block_super(sb); |
1606 | } | |
1607 | ||
aff063e2 JK |
1608 | static struct file_system_type f2fs_fs_type = { |
1609 | .owner = THIS_MODULE, | |
1610 | .name = "f2fs", | |
1611 | .mount = f2fs_mount, | |
30a5537f | 1612 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1613 | .fs_flags = FS_REQUIRES_DEV, |
1614 | }; | |
7f78e035 | 1615 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1616 | |
6e6093a8 | 1617 | static int __init init_inodecache(void) |
aff063e2 | 1618 | { |
5d097056 VD |
1619 | f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache", |
1620 | sizeof(struct f2fs_inode_info), 0, | |
1621 | SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL); | |
6bacf52f | 1622 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1623 | return -ENOMEM; |
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | static void destroy_inodecache(void) | |
1628 | { | |
1629 | /* | |
1630 | * Make sure all delayed rcu free inodes are flushed before we | |
1631 | * destroy cache. | |
1632 | */ | |
1633 | rcu_barrier(); | |
1634 | kmem_cache_destroy(f2fs_inode_cachep); | |
1635 | } | |
1636 | ||
1637 | static int __init init_f2fs_fs(void) | |
1638 | { | |
1639 | int err; | |
1640 | ||
c0508650 JK |
1641 | f2fs_build_trace_ios(); |
1642 | ||
aff063e2 JK |
1643 | err = init_inodecache(); |
1644 | if (err) | |
1645 | goto fail; | |
1646 | err = create_node_manager_caches(); | |
1647 | if (err) | |
9890ff3f | 1648 | goto free_inodecache; |
7fd9e544 | 1649 | err = create_segment_manager_caches(); |
aff063e2 | 1650 | if (err) |
9890ff3f | 1651 | goto free_node_manager_caches; |
aff063e2 JK |
1652 | err = create_checkpoint_caches(); |
1653 | if (err) | |
06292073 | 1654 | goto free_segment_manager_caches; |
1dcc336b CY |
1655 | err = create_extent_cache(); |
1656 | if (err) | |
1657 | goto free_checkpoint_caches; | |
b59d0bae | 1658 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1659 | if (!f2fs_kset) { |
1660 | err = -ENOMEM; | |
1dcc336b | 1661 | goto free_extent_cache; |
6e6b978c | 1662 | } |
2658e50d | 1663 | err = register_shrinker(&f2fs_shrinker_info); |
cfc4d971 | 1664 | if (err) |
0b81d077 | 1665 | goto free_kset; |
2658e50d JK |
1666 | |
1667 | err = register_filesystem(&f2fs_fs_type); | |
1668 | if (err) | |
1669 | goto free_shrinker; | |
787c7b8c CY |
1670 | err = f2fs_create_root_stats(); |
1671 | if (err) | |
1672 | goto free_filesystem; | |
5e176d54 | 1673 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1674 | return 0; |
1675 | ||
787c7b8c CY |
1676 | free_filesystem: |
1677 | unregister_filesystem(&f2fs_fs_type); | |
2658e50d JK |
1678 | free_shrinker: |
1679 | unregister_shrinker(&f2fs_shrinker_info); | |
9890ff3f ZH |
1680 | free_kset: |
1681 | kset_unregister(f2fs_kset); | |
1dcc336b CY |
1682 | free_extent_cache: |
1683 | destroy_extent_cache(); | |
9890ff3f ZH |
1684 | free_checkpoint_caches: |
1685 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1686 | free_segment_manager_caches: |
1687 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1688 | free_node_manager_caches: |
1689 | destroy_node_manager_caches(); | |
1690 | free_inodecache: | |
1691 | destroy_inodecache(); | |
aff063e2 JK |
1692 | fail: |
1693 | return err; | |
1694 | } | |
1695 | ||
1696 | static void __exit exit_f2fs_fs(void) | |
1697 | { | |
5e176d54 | 1698 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1699 | f2fs_destroy_root_stats(); |
2658e50d | 1700 | unregister_shrinker(&f2fs_shrinker_info); |
aff063e2 | 1701 | unregister_filesystem(&f2fs_fs_type); |
fdf6c8be | 1702 | destroy_extent_cache(); |
aff063e2 | 1703 | destroy_checkpoint_caches(); |
5dcd8a71 | 1704 | destroy_segment_manager_caches(); |
aff063e2 JK |
1705 | destroy_node_manager_caches(); |
1706 | destroy_inodecache(); | |
b59d0bae | 1707 | kset_unregister(f2fs_kset); |
351f4fba | 1708 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1709 | } |
1710 | ||
1711 | module_init(init_f2fs_fs) | |
1712 | module_exit(exit_f2fs_fs) | |
1713 | ||
1714 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1715 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1716 | MODULE_LICENSE("GPL"); |