Commit | Line | Data |
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0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
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" |
aff063e2 | 33 | |
a2a4a7e4 NJ |
34 | #define CREATE_TRACE_POINTS |
35 | #include <trace/events/f2fs.h> | |
36 | ||
5e176d54 | 37 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 38 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 39 | static struct kset *f2fs_kset; |
aff063e2 JK |
40 | |
41 | enum { | |
696c018c | 42 | Opt_gc_background, |
aff063e2 JK |
43 | Opt_disable_roll_forward, |
44 | Opt_discard, | |
45 | Opt_noheap, | |
4058c511 | 46 | Opt_user_xattr, |
aff063e2 | 47 | Opt_nouser_xattr, |
4058c511 | 48 | Opt_acl, |
aff063e2 JK |
49 | Opt_noacl, |
50 | Opt_active_logs, | |
51 | Opt_disable_ext_identify, | |
444c580f | 52 | Opt_inline_xattr, |
8274de77 | 53 | Opt_inline_data, |
5efd3c6f | 54 | Opt_inline_dentry, |
6b4afdd7 | 55 | Opt_flush_merge, |
0f7b2abd | 56 | Opt_nobarrier, |
aff063e2 JK |
57 | Opt_err, |
58 | }; | |
59 | ||
60 | static match_table_t f2fs_tokens = { | |
696c018c | 61 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
62 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
63 | {Opt_discard, "discard"}, | |
64 | {Opt_noheap, "no_heap"}, | |
4058c511 | 65 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 66 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 67 | {Opt_acl, "acl"}, |
aff063e2 JK |
68 | {Opt_noacl, "noacl"}, |
69 | {Opt_active_logs, "active_logs=%u"}, | |
70 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 71 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 72 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 73 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 74 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 75 | {Opt_nobarrier, "nobarrier"}, |
aff063e2 JK |
76 | {Opt_err, NULL}, |
77 | }; | |
78 | ||
b59d0bae | 79 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
80 | enum { |
81 | GC_THREAD, /* struct f2fs_gc_thread */ | |
82 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 83 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 84 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
85 | }; |
86 | ||
b59d0bae NJ |
87 | struct f2fs_attr { |
88 | struct attribute attr; | |
89 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
90 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
91 | const char *, size_t); | |
ea91e9b0 | 92 | int struct_type; |
b59d0bae NJ |
93 | int offset; |
94 | }; | |
95 | ||
ea91e9b0 JK |
96 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
97 | { | |
98 | if (struct_type == GC_THREAD) | |
99 | return (unsigned char *)sbi->gc_thread; | |
100 | else if (struct_type == SM_INFO) | |
101 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
102 | else if (struct_type == NM_INFO) |
103 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
104 | else if (struct_type == F2FS_SBI) |
105 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
106 | return NULL; |
107 | } | |
108 | ||
b59d0bae NJ |
109 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
110 | struct f2fs_sb_info *sbi, char *buf) | |
111 | { | |
ea91e9b0 | 112 | unsigned char *ptr = NULL; |
b59d0bae NJ |
113 | unsigned int *ui; |
114 | ||
ea91e9b0 JK |
115 | ptr = __struct_ptr(sbi, a->struct_type); |
116 | if (!ptr) | |
b59d0bae NJ |
117 | return -EINVAL; |
118 | ||
ea91e9b0 | 119 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
120 | |
121 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
122 | } | |
123 | ||
124 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
125 | struct f2fs_sb_info *sbi, | |
126 | const char *buf, size_t count) | |
127 | { | |
ea91e9b0 | 128 | unsigned char *ptr; |
b59d0bae NJ |
129 | unsigned long t; |
130 | unsigned int *ui; | |
131 | ssize_t ret; | |
132 | ||
ea91e9b0 JK |
133 | ptr = __struct_ptr(sbi, a->struct_type); |
134 | if (!ptr) | |
b59d0bae NJ |
135 | return -EINVAL; |
136 | ||
ea91e9b0 | 137 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
138 | |
139 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
140 | if (ret < 0) | |
141 | return ret; | |
142 | *ui = t; | |
143 | return count; | |
144 | } | |
145 | ||
146 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
147 | struct attribute *attr, char *buf) | |
148 | { | |
149 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
150 | s_kobj); | |
151 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
152 | ||
153 | return a->show ? a->show(a, sbi, buf) : 0; | |
154 | } | |
155 | ||
156 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
157 | const char *buf, size_t len) | |
158 | { | |
159 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
160 | s_kobj); | |
161 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
162 | ||
163 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
164 | } | |
165 | ||
166 | static void f2fs_sb_release(struct kobject *kobj) | |
167 | { | |
168 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
169 | s_kobj); | |
170 | complete(&sbi->s_kobj_unregister); | |
171 | } | |
172 | ||
ea91e9b0 | 173 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
174 | static struct f2fs_attr f2fs_attr_##_name = { \ |
175 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
176 | .show = _show, \ | |
177 | .store = _store, \ | |
ea91e9b0 JK |
178 | .struct_type = _struct_type, \ |
179 | .offset = _offset \ | |
b59d0bae NJ |
180 | } |
181 | ||
ea91e9b0 JK |
182 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
183 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
184 | f2fs_sbi_show, f2fs_sbi_store, \ | |
185 | offsetof(struct struct_name, elname)) | |
b59d0bae | 186 | |
ea91e9b0 JK |
187 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
188 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
189 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
190 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
191 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 192 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
193 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
194 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 195 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 196 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 197 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 198 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
199 | |
200 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
201 | static struct attribute *f2fs_attrs[] = { | |
202 | ATTR_LIST(gc_min_sleep_time), | |
203 | ATTR_LIST(gc_max_sleep_time), | |
204 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 205 | ATTR_LIST(gc_idle), |
ea91e9b0 | 206 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 207 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
208 | ATTR_LIST(ipu_policy), |
209 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 210 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 211 | ATTR_LIST(max_victim_search), |
ab9fa662 | 212 | ATTR_LIST(dir_level), |
cdfc41c1 | 213 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
214 | NULL, |
215 | }; | |
216 | ||
217 | static const struct sysfs_ops f2fs_attr_ops = { | |
218 | .show = f2fs_attr_show, | |
219 | .store = f2fs_attr_store, | |
220 | }; | |
221 | ||
222 | static struct kobj_type f2fs_ktype = { | |
223 | .default_attrs = f2fs_attrs, | |
224 | .sysfs_ops = &f2fs_attr_ops, | |
225 | .release = f2fs_sb_release, | |
226 | }; | |
227 | ||
a07ef784 NJ |
228 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
229 | { | |
230 | struct va_format vaf; | |
231 | va_list args; | |
232 | ||
233 | va_start(args, fmt); | |
234 | vaf.fmt = fmt; | |
235 | vaf.va = &args; | |
236 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
237 | va_end(args); | |
238 | } | |
239 | ||
aff063e2 JK |
240 | static void init_once(void *foo) |
241 | { | |
242 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
243 | ||
aff063e2 JK |
244 | inode_init_once(&fi->vfs_inode); |
245 | } | |
246 | ||
696c018c NJ |
247 | static int parse_options(struct super_block *sb, char *options) |
248 | { | |
249 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
250 | substring_t args[MAX_OPT_ARGS]; | |
251 | char *p, *name; | |
252 | int arg = 0; | |
253 | ||
254 | if (!options) | |
255 | return 0; | |
256 | ||
257 | while ((p = strsep(&options, ",")) != NULL) { | |
258 | int token; | |
259 | if (!*p) | |
260 | continue; | |
261 | /* | |
262 | * Initialize args struct so we know whether arg was | |
263 | * found; some options take optional arguments. | |
264 | */ | |
265 | args[0].to = args[0].from = NULL; | |
266 | token = match_token(p, f2fs_tokens, args); | |
267 | ||
268 | switch (token) { | |
269 | case Opt_gc_background: | |
270 | name = match_strdup(&args[0]); | |
271 | ||
272 | if (!name) | |
273 | return -ENOMEM; | |
04c09388 | 274 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 275 | set_opt(sbi, BG_GC); |
04c09388 | 276 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
277 | clear_opt(sbi, BG_GC); |
278 | else { | |
279 | kfree(name); | |
280 | return -EINVAL; | |
281 | } | |
282 | kfree(name); | |
283 | break; | |
284 | case Opt_disable_roll_forward: | |
285 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
286 | break; | |
287 | case Opt_discard: | |
288 | set_opt(sbi, DISCARD); | |
289 | break; | |
290 | case Opt_noheap: | |
291 | set_opt(sbi, NOHEAP); | |
292 | break; | |
293 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
294 | case Opt_user_xattr: |
295 | set_opt(sbi, XATTR_USER); | |
296 | break; | |
696c018c NJ |
297 | case Opt_nouser_xattr: |
298 | clear_opt(sbi, XATTR_USER); | |
299 | break; | |
444c580f JK |
300 | case Opt_inline_xattr: |
301 | set_opt(sbi, INLINE_XATTR); | |
302 | break; | |
696c018c | 303 | #else |
4058c511 KA |
304 | case Opt_user_xattr: |
305 | f2fs_msg(sb, KERN_INFO, | |
306 | "user_xattr options not supported"); | |
307 | break; | |
696c018c NJ |
308 | case Opt_nouser_xattr: |
309 | f2fs_msg(sb, KERN_INFO, | |
310 | "nouser_xattr options not supported"); | |
311 | break; | |
444c580f JK |
312 | case Opt_inline_xattr: |
313 | f2fs_msg(sb, KERN_INFO, | |
314 | "inline_xattr options not supported"); | |
315 | break; | |
696c018c NJ |
316 | #endif |
317 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
318 | case Opt_acl: |
319 | set_opt(sbi, POSIX_ACL); | |
320 | break; | |
696c018c NJ |
321 | case Opt_noacl: |
322 | clear_opt(sbi, POSIX_ACL); | |
323 | break; | |
324 | #else | |
4058c511 KA |
325 | case Opt_acl: |
326 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
327 | break; | |
696c018c NJ |
328 | case Opt_noacl: |
329 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
330 | break; | |
331 | #endif | |
332 | case Opt_active_logs: | |
333 | if (args->from && match_int(args, &arg)) | |
334 | return -EINVAL; | |
335 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
336 | return -EINVAL; | |
337 | sbi->active_logs = arg; | |
338 | break; | |
339 | case Opt_disable_ext_identify: | |
340 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
341 | break; | |
8274de77 HL |
342 | case Opt_inline_data: |
343 | set_opt(sbi, INLINE_DATA); | |
344 | break; | |
5efd3c6f CY |
345 | case Opt_inline_dentry: |
346 | set_opt(sbi, INLINE_DENTRY); | |
347 | break; | |
6b4afdd7 JK |
348 | case Opt_flush_merge: |
349 | set_opt(sbi, FLUSH_MERGE); | |
350 | break; | |
0f7b2abd JK |
351 | case Opt_nobarrier: |
352 | set_opt(sbi, NOBARRIER); | |
353 | break; | |
696c018c NJ |
354 | default: |
355 | f2fs_msg(sb, KERN_ERR, | |
356 | "Unrecognized mount option \"%s\" or missing value", | |
357 | p); | |
358 | return -EINVAL; | |
359 | } | |
360 | } | |
361 | return 0; | |
362 | } | |
363 | ||
aff063e2 JK |
364 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
365 | { | |
366 | struct f2fs_inode_info *fi; | |
367 | ||
a0acdfe0 | 368 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
369 | if (!fi) |
370 | return NULL; | |
371 | ||
372 | init_once((void *) fi); | |
373 | ||
434720fa | 374 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 375 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 376 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
377 | fi->i_current_depth = 1; |
378 | fi->i_advise = 0; | |
379 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 380 | init_rwsem(&fi->i_sem); |
34ba94ba | 381 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
382 | INIT_LIST_HEAD(&fi->inmem_pages); |
383 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
384 | |
385 | set_inode_flag(fi, FI_NEW_INODE); | |
386 | ||
444c580f JK |
387 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
388 | set_inode_flag(fi, FI_INLINE_XATTR); | |
389 | ||
ab9fa662 JK |
390 | /* Will be used by directory only */ |
391 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
392 | ||
aff063e2 JK |
393 | return &fi->vfs_inode; |
394 | } | |
395 | ||
531ad7d5 JK |
396 | static int f2fs_drop_inode(struct inode *inode) |
397 | { | |
398 | /* | |
399 | * This is to avoid a deadlock condition like below. | |
400 | * writeback_single_inode(inode) | |
401 | * - f2fs_write_data_page | |
402 | * - f2fs_gc -> iput -> evict | |
403 | * - inode_wait_for_writeback(inode) | |
404 | */ | |
405 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
406 | return 0; | |
407 | return generic_drop_inode(inode); | |
408 | } | |
409 | ||
b3783873 JK |
410 | /* |
411 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
412 | * | |
413 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
414 | */ | |
415 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
416 | { | |
417 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
418 | } |
419 | ||
aff063e2 JK |
420 | static void f2fs_i_callback(struct rcu_head *head) |
421 | { | |
422 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
423 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
424 | } | |
425 | ||
25ca923b | 426 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
427 | { |
428 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
429 | } | |
430 | ||
431 | static void f2fs_put_super(struct super_block *sb) | |
432 | { | |
433 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
434 | ||
5e176d54 JK |
435 | if (sbi->s_proc) { |
436 | remove_proc_entry("segment_info", sbi->s_proc); | |
437 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
438 | } | |
b59d0bae | 439 | kobject_del(&sbi->s_kobj); |
5e176d54 | 440 | |
aff063e2 JK |
441 | f2fs_destroy_stats(sbi); |
442 | stop_gc_thread(sbi); | |
443 | ||
5887d291 | 444 | /* We don't need to do checkpoint when it's clean */ |
75ab4cb8 JK |
445 | if (sbi->s_dirty) { |
446 | struct cp_control cpc = { | |
447 | .reason = CP_UMOUNT, | |
448 | }; | |
449 | write_checkpoint(sbi, &cpc); | |
450 | } | |
aff063e2 | 451 | |
cf779cab JK |
452 | /* |
453 | * normally superblock is clean, so we need to release this. | |
454 | * In addition, EIO will skip do checkpoint, we need this as well. | |
455 | */ | |
6f12ac25 | 456 | release_dirty_inode(sbi); |
4b2fecc8 | 457 | release_discard_addrs(sbi); |
6f12ac25 | 458 | |
aff063e2 JK |
459 | iput(sbi->node_inode); |
460 | iput(sbi->meta_inode); | |
461 | ||
462 | /* destroy f2fs internal modules */ | |
463 | destroy_node_manager(sbi); | |
464 | destroy_segment_manager(sbi); | |
465 | ||
466 | kfree(sbi->ckpt); | |
b59d0bae NJ |
467 | kobject_put(&sbi->s_kobj); |
468 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
469 | |
470 | sb->s_fs_info = NULL; | |
471 | brelse(sbi->raw_super_buf); | |
472 | kfree(sbi); | |
473 | } | |
474 | ||
475 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
476 | { | |
477 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 478 | |
a2a4a7e4 NJ |
479 | trace_f2fs_sync_fs(sb, sync); |
480 | ||
b7473754 | 481 | if (sync) { |
75ab4cb8 JK |
482 | struct cp_control cpc = { |
483 | .reason = CP_SYNC, | |
484 | }; | |
b7473754 | 485 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 486 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
487 | mutex_unlock(&sbi->gc_mutex); |
488 | } else { | |
7d82db83 | 489 | f2fs_balance_fs(sbi); |
b7473754 | 490 | } |
aff063e2 | 491 | |
64c576fe | 492 | return 0; |
aff063e2 JK |
493 | } |
494 | ||
d6212a5f CL |
495 | static int f2fs_freeze(struct super_block *sb) |
496 | { | |
497 | int err; | |
498 | ||
77888c1e | 499 | if (f2fs_readonly(sb)) |
d6212a5f CL |
500 | return 0; |
501 | ||
502 | err = f2fs_sync_fs(sb, 1); | |
503 | return err; | |
504 | } | |
505 | ||
506 | static int f2fs_unfreeze(struct super_block *sb) | |
507 | { | |
508 | return 0; | |
509 | } | |
510 | ||
aff063e2 JK |
511 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
512 | { | |
513 | struct super_block *sb = dentry->d_sb; | |
514 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
515 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
516 | block_t total_count, user_block_count, start_count, ovp_count; | |
517 | ||
518 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
519 | user_block_count = sbi->user_block_count; | |
520 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
521 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
522 | buf->f_type = F2FS_SUPER_MAGIC; | |
523 | buf->f_bsize = sbi->blocksize; | |
524 | ||
525 | buf->f_blocks = total_count - start_count; | |
526 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
527 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
528 | ||
c200b1aa CY |
529 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
530 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 531 | |
5a20d339 | 532 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
533 | buf->f_fsid.val[0] = (u32)id; |
534 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
540 | { | |
541 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
542 | ||
b270ad6f | 543 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 544 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 545 | else |
696c018c | 546 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
547 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
548 | seq_puts(seq, ",disable_roll_forward"); | |
549 | if (test_opt(sbi, DISCARD)) | |
550 | seq_puts(seq, ",discard"); | |
551 | if (test_opt(sbi, NOHEAP)) | |
552 | seq_puts(seq, ",no_heap_alloc"); | |
553 | #ifdef CONFIG_F2FS_FS_XATTR | |
554 | if (test_opt(sbi, XATTR_USER)) | |
555 | seq_puts(seq, ",user_xattr"); | |
556 | else | |
557 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
558 | if (test_opt(sbi, INLINE_XATTR)) |
559 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
560 | #endif |
561 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
562 | if (test_opt(sbi, POSIX_ACL)) | |
563 | seq_puts(seq, ",acl"); | |
564 | else | |
565 | seq_puts(seq, ",noacl"); | |
566 | #endif | |
567 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 568 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
569 | if (test_opt(sbi, INLINE_DATA)) |
570 | seq_puts(seq, ",inline_data"); | |
5efd3c6f CY |
571 | if (test_opt(sbi, INLINE_DENTRY)) |
572 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 573 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 574 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
575 | if (test_opt(sbi, NOBARRIER)) |
576 | seq_puts(seq, ",nobarrier"); | |
aff063e2 JK |
577 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
5e176d54 JK |
582 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
583 | { | |
584 | struct super_block *sb = seq->private; | |
585 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
586 | unsigned int total_segs = |
587 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
588 | int i; |
589 | ||
90aa6dc9 CY |
590 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
591 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
592 | ||
5e176d54 | 593 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
594 | struct seg_entry *se = get_seg_entry(sbi, i); |
595 | ||
596 | if ((i % 10) == 0) | |
597 | seq_printf(seq, "%-5d", i); | |
598 | seq_printf(seq, "%d|%-3u", se->type, | |
599 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
600 | if ((i % 10) == 9 || i == (total_segs - 1)) |
601 | seq_putc(seq, '\n'); | |
5e176d54 | 602 | else |
46c04366 | 603 | seq_putc(seq, ' '); |
5e176d54 | 604 | } |
46c04366 | 605 | |
5e176d54 JK |
606 | return 0; |
607 | } | |
608 | ||
609 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
610 | { | |
611 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
612 | } | |
613 | ||
614 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
615 | .owner = THIS_MODULE, | |
616 | .open = segment_info_open_fs, | |
617 | .read = seq_read, | |
618 | .llseek = seq_lseek, | |
619 | .release = single_release, | |
620 | }; | |
621 | ||
696c018c NJ |
622 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
623 | { | |
624 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
625 | struct f2fs_mount_info org_mount_opt; | |
626 | int err, active_logs; | |
876dc59e GZ |
627 | bool need_restart_gc = false; |
628 | bool need_stop_gc = false; | |
696c018c | 629 | |
02b9984d TT |
630 | sync_filesystem(sb); |
631 | ||
696c018c NJ |
632 | /* |
633 | * Save the old mount options in case we | |
634 | * need to restore them. | |
635 | */ | |
636 | org_mount_opt = sbi->mount_opt; | |
637 | active_logs = sbi->active_logs; | |
638 | ||
26666c8a CY |
639 | sbi->mount_opt.opt = 0; |
640 | sbi->active_logs = NR_CURSEG_TYPE; | |
641 | ||
696c018c NJ |
642 | /* parse mount options */ |
643 | err = parse_options(sb, data); | |
644 | if (err) | |
645 | goto restore_opts; | |
646 | ||
647 | /* | |
648 | * Previous and new state of filesystem is RO, | |
876dc59e | 649 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 650 | */ |
6b2920a5 | 651 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
652 | goto skip; |
653 | ||
654 | /* | |
655 | * We stop the GC thread if FS is mounted as RO | |
656 | * or if background_gc = off is passed in mount | |
657 | * option. Also sync the filesystem. | |
658 | */ | |
659 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
660 | if (sbi->gc_thread) { | |
661 | stop_gc_thread(sbi); | |
662 | f2fs_sync_fs(sb, 1); | |
876dc59e | 663 | need_restart_gc = true; |
696c018c NJ |
664 | } |
665 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
666 | err = start_gc_thread(sbi); | |
667 | if (err) | |
668 | goto restore_opts; | |
876dc59e GZ |
669 | need_stop_gc = true; |
670 | } | |
671 | ||
672 | /* | |
673 | * We stop issue flush thread if FS is mounted as RO | |
674 | * or if flush_merge is not passed in mount option. | |
675 | */ | |
676 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 677 | destroy_flush_cmd_control(sbi); |
6b2920a5 | 678 | } else if (test_opt(sbi, FLUSH_MERGE) && !SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
679 | err = create_flush_cmd_control(sbi); |
680 | if (err) | |
a688b9d9 | 681 | goto restore_gc; |
696c018c NJ |
682 | } |
683 | skip: | |
684 | /* Update the POSIXACL Flag */ | |
685 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
686 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
687 | return 0; | |
876dc59e GZ |
688 | restore_gc: |
689 | if (need_restart_gc) { | |
690 | if (start_gc_thread(sbi)) | |
691 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 692 | "background gc thread has stopped"); |
876dc59e GZ |
693 | } else if (need_stop_gc) { |
694 | stop_gc_thread(sbi); | |
695 | } | |
696c018c NJ |
696 | restore_opts: |
697 | sbi->mount_opt = org_mount_opt; | |
698 | sbi->active_logs = active_logs; | |
699 | return err; | |
700 | } | |
701 | ||
aff063e2 JK |
702 | static struct super_operations f2fs_sops = { |
703 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 704 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
705 | .destroy_inode = f2fs_destroy_inode, |
706 | .write_inode = f2fs_write_inode, | |
b3783873 | 707 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
708 | .show_options = f2fs_show_options, |
709 | .evict_inode = f2fs_evict_inode, | |
710 | .put_super = f2fs_put_super, | |
711 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
712 | .freeze_fs = f2fs_freeze, |
713 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 714 | .statfs = f2fs_statfs, |
696c018c | 715 | .remount_fs = f2fs_remount, |
aff063e2 JK |
716 | }; |
717 | ||
718 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
719 | u64 ino, u32 generation) | |
720 | { | |
721 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
722 | struct inode *inode; | |
723 | ||
d6b7d4b3 | 724 | if (check_nid_range(sbi, ino)) |
910bb12d | 725 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
726 | |
727 | /* | |
728 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
729 | * However f2fs_iget currently does appropriate checks to handle stale | |
730 | * inodes so everything is OK. | |
731 | */ | |
732 | inode = f2fs_iget(sb, ino); | |
733 | if (IS_ERR(inode)) | |
734 | return ERR_CAST(inode); | |
6bacf52f | 735 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
736 | /* we didn't find the right inode.. */ |
737 | iput(inode); | |
738 | return ERR_PTR(-ESTALE); | |
739 | } | |
740 | return inode; | |
741 | } | |
742 | ||
743 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
744 | int fh_len, int fh_type) | |
745 | { | |
746 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
747 | f2fs_nfs_get_inode); | |
748 | } | |
749 | ||
750 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
751 | int fh_len, int fh_type) | |
752 | { | |
753 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
754 | f2fs_nfs_get_inode); | |
755 | } | |
756 | ||
757 | static const struct export_operations f2fs_export_ops = { | |
758 | .fh_to_dentry = f2fs_fh_to_dentry, | |
759 | .fh_to_parent = f2fs_fh_to_parent, | |
760 | .get_parent = f2fs_get_parent, | |
761 | }; | |
762 | ||
aff063e2 JK |
763 | static loff_t max_file_size(unsigned bits) |
764 | { | |
de93653f | 765 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
766 | loff_t leaf_count = ADDRS_PER_BLOCK; |
767 | ||
768 | /* two direct node blocks */ | |
769 | result += (leaf_count * 2); | |
770 | ||
771 | /* two indirect node blocks */ | |
772 | leaf_count *= NIDS_PER_BLOCK; | |
773 | result += (leaf_count * 2); | |
774 | ||
775 | /* one double indirect node block */ | |
776 | leaf_count *= NIDS_PER_BLOCK; | |
777 | result += leaf_count; | |
778 | ||
779 | result <<= bits; | |
780 | return result; | |
781 | } | |
782 | ||
a07ef784 NJ |
783 | static int sanity_check_raw_super(struct super_block *sb, |
784 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
785 | { |
786 | unsigned int blocksize; | |
787 | ||
a07ef784 NJ |
788 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
789 | f2fs_msg(sb, KERN_INFO, | |
790 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
791 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 792 | return 1; |
a07ef784 | 793 | } |
aff063e2 | 794 | |
5c9b4692 | 795 | /* Currently, support only 4KB page cache size */ |
796 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
797 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 798 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 799 | PAGE_CACHE_SIZE); |
800 | return 1; | |
801 | } | |
802 | ||
aff063e2 JK |
803 | /* Currently, support only 4KB block size */ |
804 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 805 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
806 | f2fs_msg(sb, KERN_INFO, |
807 | "Invalid blocksize (%u), supports only 4KB\n", | |
808 | blocksize); | |
aff063e2 | 809 | return 1; |
a07ef784 | 810 | } |
5c9b4692 | 811 | |
55cf9cb6 CY |
812 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
813 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
814 | F2FS_MAX_LOG_SECTOR_SIZE || | |
815 | le32_to_cpu(raw_super->log_sectorsize) < | |
816 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
817 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
818 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 819 | return 1; |
a07ef784 | 820 | } |
55cf9cb6 CY |
821 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
822 | le32_to_cpu(raw_super->log_sectorsize) != | |
823 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
824 | f2fs_msg(sb, KERN_INFO, | |
825 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
826 | le32_to_cpu(raw_super->log_sectors_per_block), | |
827 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 828 | return 1; |
a07ef784 | 829 | } |
aff063e2 JK |
830 | return 0; |
831 | } | |
832 | ||
577e3495 | 833 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
834 | { |
835 | unsigned int total, fsmeta; | |
577e3495 JK |
836 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
837 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
838 | |
839 | total = le32_to_cpu(raw_super->segment_count); | |
840 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
841 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
842 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
843 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
844 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
845 | ||
6bacf52f | 846 | if (unlikely(fsmeta >= total)) |
aff063e2 | 847 | return 1; |
577e3495 | 848 | |
1e968fdf | 849 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
850 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
851 | return 1; | |
852 | } | |
aff063e2 JK |
853 | return 0; |
854 | } | |
855 | ||
856 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
857 | { | |
858 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
859 | int i; | |
860 | ||
861 | sbi->log_sectors_per_block = | |
862 | le32_to_cpu(raw_super->log_sectors_per_block); | |
863 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
864 | sbi->blocksize = 1 << sbi->log_blocksize; | |
865 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
866 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
867 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
868 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
869 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
870 | sbi->total_node_count = | |
871 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
872 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
873 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
874 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
875 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 876 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 877 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
878 | |
879 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
880 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
881 | |
882 | sbi->dir_level = DEF_DIR_LEVEL; | |
2ae4c673 | 883 | sbi->need_fsck = false; |
aff063e2 JK |
884 | } |
885 | ||
9076a75f GZ |
886 | /* |
887 | * Read f2fs raw super block. | |
888 | * Because we have two copies of super block, so read the first one at first, | |
889 | * if the first one is invalid, move to read the second one. | |
890 | */ | |
891 | static int read_raw_super_block(struct super_block *sb, | |
892 | struct f2fs_super_block **raw_super, | |
893 | struct buffer_head **raw_super_buf) | |
14d7e9de | 894 | { |
9076a75f | 895 | int block = 0; |
14d7e9de | 896 | |
9076a75f | 897 | retry: |
14d7e9de | 898 | *raw_super_buf = sb_bread(sb, block); |
899 | if (!*raw_super_buf) { | |
9076a75f GZ |
900 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
901 | block + 1); | |
902 | if (block == 0) { | |
903 | block++; | |
904 | goto retry; | |
905 | } else { | |
906 | return -EIO; | |
907 | } | |
14d7e9de | 908 | } |
909 | ||
910 | *raw_super = (struct f2fs_super_block *) | |
911 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
912 | ||
913 | /* sanity checking of raw super */ | |
9076a75f GZ |
914 | if (sanity_check_raw_super(sb, *raw_super)) { |
915 | brelse(*raw_super_buf); | |
6c311ec6 CF |
916 | f2fs_msg(sb, KERN_ERR, |
917 | "Can't find valid F2FS filesystem in %dth superblock", | |
918 | block + 1); | |
6bacf52f | 919 | if (block == 0) { |
9076a75f GZ |
920 | block++; |
921 | goto retry; | |
922 | } else { | |
923 | return -EINVAL; | |
924 | } | |
925 | } | |
14d7e9de | 926 | |
9076a75f | 927 | return 0; |
14d7e9de | 928 | } |
929 | ||
aff063e2 JK |
930 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
931 | { | |
932 | struct f2fs_sb_info *sbi; | |
933 | struct f2fs_super_block *raw_super; | |
934 | struct buffer_head *raw_super_buf; | |
935 | struct inode *root; | |
936 | long err = -EINVAL; | |
ed2e621a | 937 | bool retry = true; |
971767ca | 938 | int i; |
aff063e2 | 939 | |
ed2e621a | 940 | try_onemore: |
aff063e2 JK |
941 | /* allocate memory for f2fs-specific super block info */ |
942 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
943 | if (!sbi) | |
944 | return -ENOMEM; | |
945 | ||
ff9234ad | 946 | /* set a block size */ |
6bacf52f | 947 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 948 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 949 | goto free_sbi; |
a07ef784 | 950 | } |
aff063e2 | 951 | |
9076a75f GZ |
952 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
953 | if (err) | |
954 | goto free_sbi; | |
955 | ||
5fb08372 | 956 | sb->s_fs_info = sbi; |
aff063e2 JK |
957 | /* init some FS parameters */ |
958 | sbi->active_logs = NR_CURSEG_TYPE; | |
959 | ||
960 | set_opt(sbi, BG_GC); | |
961 | ||
962 | #ifdef CONFIG_F2FS_FS_XATTR | |
963 | set_opt(sbi, XATTR_USER); | |
964 | #endif | |
965 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
966 | set_opt(sbi, POSIX_ACL); | |
967 | #endif | |
968 | /* parse mount options */ | |
5fb08372 | 969 | err = parse_options(sb, (char *)data); |
66348b72 | 970 | if (err) |
aff063e2 JK |
971 | goto free_sb_buf; |
972 | ||
25ca923b | 973 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
974 | sb->s_max_links = F2FS_LINK_MAX; |
975 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
976 | ||
977 | sb->s_op = &f2fs_sops; | |
978 | sb->s_xattr = f2fs_xattr_handlers; | |
979 | sb->s_export_op = &f2fs_export_ops; | |
980 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
981 | sb->s_time_gran = 1; |
982 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
983 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
984 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
985 | ||
986 | /* init f2fs-specific super block info */ | |
987 | sbi->sb = sb; | |
988 | sbi->raw_super = raw_super; | |
989 | sbi->raw_super_buf = raw_super_buf; | |
990 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
991 | mutex_init(&sbi->writepages); |
992 | mutex_init(&sbi->cp_mutex); | |
b3582c68 | 993 | init_rwsem(&sbi->node_write); |
aabe5136 | 994 | sbi->por_doing = false; |
aff063e2 | 995 | spin_lock_init(&sbi->stat_lock); |
971767ca | 996 | |
df0f8dc0 | 997 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
998 | sbi->read_io.sbi = sbi; |
999 | sbi->read_io.bio = NULL; | |
1000 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1001 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1002 | sbi->write_io[i].sbi = sbi; |
1003 | sbi->write_io[i].bio = NULL; | |
1004 | } | |
971767ca | 1005 | |
e479556b | 1006 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1007 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1008 | init_sb_info(sbi); |
1009 | ||
1010 | /* get an inode for meta space */ | |
1011 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1012 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1013 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
1014 | err = PTR_ERR(sbi->meta_inode); |
1015 | goto free_sb_buf; | |
1016 | } | |
1017 | ||
1018 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1019 | if (err) { |
1020 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1021 | goto free_meta_inode; |
a07ef784 | 1022 | } |
aff063e2 JK |
1023 | |
1024 | /* sanity checking of checkpoint */ | |
1025 | err = -EINVAL; | |
577e3495 | 1026 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1027 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1028 | goto free_cp; |
a07ef784 | 1029 | } |
aff063e2 JK |
1030 | |
1031 | sbi->total_valid_node_count = | |
1032 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1033 | sbi->total_valid_inode_count = | |
1034 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1035 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1036 | sbi->total_valid_block_count = | |
1037 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1038 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1039 | sbi->alloc_valid_block_count = 0; | |
1040 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1041 | spin_lock_init(&sbi->dir_inode_lock); | |
1042 | ||
6451e041 | 1043 | init_ino_entry_info(sbi); |
aff063e2 JK |
1044 | |
1045 | /* setup f2fs internal modules */ | |
1046 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1047 | if (err) { |
1048 | f2fs_msg(sb, KERN_ERR, | |
1049 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1050 | goto free_sm; |
a07ef784 | 1051 | } |
aff063e2 | 1052 | err = build_node_manager(sbi); |
a07ef784 NJ |
1053 | if (err) { |
1054 | f2fs_msg(sb, KERN_ERR, | |
1055 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1056 | goto free_nm; |
a07ef784 | 1057 | } |
aff063e2 JK |
1058 | |
1059 | build_gc_manager(sbi); | |
1060 | ||
1061 | /* get an inode for node space */ | |
1062 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1063 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1064 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1065 | err = PTR_ERR(sbi->node_inode); |
1066 | goto free_nm; | |
1067 | } | |
1068 | ||
1069 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1070 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1071 | |
1072 | /* read root inode and dentry */ | |
1073 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1074 | if (IS_ERR(root)) { | |
a07ef784 | 1075 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1076 | err = PTR_ERR(root); |
1077 | goto free_node_inode; | |
1078 | } | |
8f99a946 | 1079 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1080 | iput(root); |
8f99a946 | 1081 | err = -EINVAL; |
9d847950 | 1082 | goto free_node_inode; |
8f99a946 | 1083 | } |
aff063e2 JK |
1084 | |
1085 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1086 | if (!sb->s_root) { | |
1087 | err = -ENOMEM; | |
1088 | goto free_root_inode; | |
1089 | } | |
1090 | ||
aff063e2 JK |
1091 | err = f2fs_build_stats(sbi); |
1092 | if (err) | |
6437d1b0 | 1093 | goto free_root_inode; |
aff063e2 | 1094 | |
5e176d54 JK |
1095 | if (f2fs_proc_root) |
1096 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1097 | ||
1098 | if (sbi->s_proc) | |
1099 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1100 | &f2fs_seq_segment_info_fops, sb); | |
1101 | ||
d3ee456d NJ |
1102 | if (test_opt(sbi, DISCARD)) { |
1103 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1104 | if (!blk_queue_discard(q)) | |
1105 | f2fs_msg(sb, KERN_WARNING, | |
1106 | "mounting with \"discard\" option, but " | |
1107 | "the device does not support discard"); | |
1108 | } | |
1109 | ||
b59d0bae NJ |
1110 | sbi->s_kobj.kset = f2fs_kset; |
1111 | init_completion(&sbi->s_kobj_unregister); | |
1112 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1113 | "%s", sb->s_id); | |
1114 | if (err) | |
6437d1b0 | 1115 | goto free_proc; |
b59d0bae | 1116 | |
b0c44f05 JK |
1117 | if (!retry) |
1118 | sbi->need_fsck = true; | |
1119 | ||
6437d1b0 JK |
1120 | /* recover fsynced data */ |
1121 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1122 | err = recover_fsync_data(sbi); | |
ed2e621a | 1123 | if (err) { |
6437d1b0 JK |
1124 | f2fs_msg(sb, KERN_ERR, |
1125 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1126 | goto free_kobj; |
1127 | } | |
6437d1b0 | 1128 | } |
b59d0bae | 1129 | |
6437d1b0 JK |
1130 | /* |
1131 | * If filesystem is not mounted as read-only then | |
1132 | * do start the gc_thread. | |
1133 | */ | |
6b2920a5 | 1134 | if (!f2fs_readonly(sb)) { |
6437d1b0 JK |
1135 | /* After POR, we can run background GC thread.*/ |
1136 | err = start_gc_thread(sbi); | |
1137 | if (err) | |
1138 | goto free_kobj; | |
1139 | } | |
aff063e2 | 1140 | return 0; |
6437d1b0 JK |
1141 | |
1142 | free_kobj: | |
1143 | kobject_del(&sbi->s_kobj); | |
1144 | free_proc: | |
1d15bd20 CY |
1145 | if (sbi->s_proc) { |
1146 | remove_proc_entry("segment_info", sbi->s_proc); | |
1147 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1148 | } | |
1149 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1150 | free_root_inode: |
1151 | dput(sb->s_root); | |
1152 | sb->s_root = NULL; | |
1153 | free_node_inode: | |
1154 | iput(sbi->node_inode); | |
1155 | free_nm: | |
1156 | destroy_node_manager(sbi); | |
1157 | free_sm: | |
1158 | destroy_segment_manager(sbi); | |
1159 | free_cp: | |
1160 | kfree(sbi->ckpt); | |
1161 | free_meta_inode: | |
1162 | make_bad_inode(sbi->meta_inode); | |
1163 | iput(sbi->meta_inode); | |
1164 | free_sb_buf: | |
1165 | brelse(raw_super_buf); | |
1166 | free_sbi: | |
1167 | kfree(sbi); | |
ed2e621a JK |
1168 | |
1169 | /* give only one another chance */ | |
1170 | if (retry) { | |
922cedbd | 1171 | retry = 0; |
ed2e621a JK |
1172 | shrink_dcache_sb(sb); |
1173 | goto try_onemore; | |
1174 | } | |
aff063e2 JK |
1175 | return err; |
1176 | } | |
1177 | ||
1178 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1179 | const char *dev_name, void *data) | |
1180 | { | |
1181 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1182 | } | |
1183 | ||
1184 | static struct file_system_type f2fs_fs_type = { | |
1185 | .owner = THIS_MODULE, | |
1186 | .name = "f2fs", | |
1187 | .mount = f2fs_mount, | |
1188 | .kill_sb = kill_block_super, | |
1189 | .fs_flags = FS_REQUIRES_DEV, | |
1190 | }; | |
7f78e035 | 1191 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1192 | |
6e6093a8 | 1193 | static int __init init_inodecache(void) |
aff063e2 JK |
1194 | { |
1195 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1196 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1197 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1198 | return -ENOMEM; |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static void destroy_inodecache(void) | |
1203 | { | |
1204 | /* | |
1205 | * Make sure all delayed rcu free inodes are flushed before we | |
1206 | * destroy cache. | |
1207 | */ | |
1208 | rcu_barrier(); | |
1209 | kmem_cache_destroy(f2fs_inode_cachep); | |
1210 | } | |
1211 | ||
1212 | static int __init init_f2fs_fs(void) | |
1213 | { | |
1214 | int err; | |
1215 | ||
1216 | err = init_inodecache(); | |
1217 | if (err) | |
1218 | goto fail; | |
1219 | err = create_node_manager_caches(); | |
1220 | if (err) | |
9890ff3f | 1221 | goto free_inodecache; |
7fd9e544 | 1222 | err = create_segment_manager_caches(); |
aff063e2 | 1223 | if (err) |
9890ff3f | 1224 | goto free_node_manager_caches; |
7fd9e544 JK |
1225 | err = create_gc_caches(); |
1226 | if (err) | |
1227 | goto free_segment_manager_caches; | |
aff063e2 JK |
1228 | err = create_checkpoint_caches(); |
1229 | if (err) | |
9890ff3f | 1230 | goto free_gc_caches; |
b59d0bae | 1231 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1232 | if (!f2fs_kset) { |
1233 | err = -ENOMEM; | |
9890ff3f | 1234 | goto free_checkpoint_caches; |
6e6b978c | 1235 | } |
4589d25d NJ |
1236 | err = register_filesystem(&f2fs_fs_type); |
1237 | if (err) | |
9890ff3f | 1238 | goto free_kset; |
4589d25d | 1239 | f2fs_create_root_stats(); |
5e176d54 | 1240 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1241 | return 0; |
1242 | ||
1243 | free_kset: | |
1244 | kset_unregister(f2fs_kset); | |
1245 | free_checkpoint_caches: | |
1246 | destroy_checkpoint_caches(); | |
1247 | free_gc_caches: | |
1248 | destroy_gc_caches(); | |
7fd9e544 JK |
1249 | free_segment_manager_caches: |
1250 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1251 | free_node_manager_caches: |
1252 | destroy_node_manager_caches(); | |
1253 | free_inodecache: | |
1254 | destroy_inodecache(); | |
aff063e2 JK |
1255 | fail: |
1256 | return err; | |
1257 | } | |
1258 | ||
1259 | static void __exit exit_f2fs_fs(void) | |
1260 | { | |
5e176d54 | 1261 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1262 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1263 | unregister_filesystem(&f2fs_fs_type); |
1264 | destroy_checkpoint_caches(); | |
1265 | destroy_gc_caches(); | |
5dcd8a71 | 1266 | destroy_segment_manager_caches(); |
aff063e2 JK |
1267 | destroy_node_manager_caches(); |
1268 | destroy_inodecache(); | |
b59d0bae | 1269 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1270 | } |
1271 | ||
1272 | module_init(init_f2fs_fs) | |
1273 | module_exit(exit_f2fs_fs) | |
1274 | ||
1275 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1276 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1277 | MODULE_LICENSE("GPL"); |