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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, |
d5053a34 | 57 | Opt_fastboot, |
aff063e2 JK |
58 | Opt_err, |
59 | }; | |
60 | ||
61 | static match_table_t f2fs_tokens = { | |
696c018c | 62 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
63 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
64 | {Opt_discard, "discard"}, | |
65 | {Opt_noheap, "no_heap"}, | |
4058c511 | 66 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 67 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 68 | {Opt_acl, "acl"}, |
aff063e2 JK |
69 | {Opt_noacl, "noacl"}, |
70 | {Opt_active_logs, "active_logs=%u"}, | |
71 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 72 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 73 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 74 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 75 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 76 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 77 | {Opt_fastboot, "fastboot"}, |
aff063e2 JK |
78 | {Opt_err, NULL}, |
79 | }; | |
80 | ||
b59d0bae | 81 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
82 | enum { |
83 | GC_THREAD, /* struct f2fs_gc_thread */ | |
84 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 85 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 86 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
87 | }; |
88 | ||
b59d0bae NJ |
89 | struct f2fs_attr { |
90 | struct attribute attr; | |
91 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
92 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
93 | const char *, size_t); | |
ea91e9b0 | 94 | int struct_type; |
b59d0bae NJ |
95 | int offset; |
96 | }; | |
97 | ||
ea91e9b0 JK |
98 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
99 | { | |
100 | if (struct_type == GC_THREAD) | |
101 | return (unsigned char *)sbi->gc_thread; | |
102 | else if (struct_type == SM_INFO) | |
103 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
104 | else if (struct_type == NM_INFO) |
105 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
106 | else if (struct_type == F2FS_SBI) |
107 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
108 | return NULL; |
109 | } | |
110 | ||
b59d0bae NJ |
111 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
112 | struct f2fs_sb_info *sbi, char *buf) | |
113 | { | |
ea91e9b0 | 114 | unsigned char *ptr = NULL; |
b59d0bae NJ |
115 | unsigned int *ui; |
116 | ||
ea91e9b0 JK |
117 | ptr = __struct_ptr(sbi, a->struct_type); |
118 | if (!ptr) | |
b59d0bae NJ |
119 | return -EINVAL; |
120 | ||
ea91e9b0 | 121 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
122 | |
123 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
124 | } | |
125 | ||
126 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
127 | struct f2fs_sb_info *sbi, | |
128 | const char *buf, size_t count) | |
129 | { | |
ea91e9b0 | 130 | unsigned char *ptr; |
b59d0bae NJ |
131 | unsigned long t; |
132 | unsigned int *ui; | |
133 | ssize_t ret; | |
134 | ||
ea91e9b0 JK |
135 | ptr = __struct_ptr(sbi, a->struct_type); |
136 | if (!ptr) | |
b59d0bae NJ |
137 | return -EINVAL; |
138 | ||
ea91e9b0 | 139 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
140 | |
141 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
142 | if (ret < 0) | |
143 | return ret; | |
144 | *ui = t; | |
145 | return count; | |
146 | } | |
147 | ||
148 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
149 | struct attribute *attr, char *buf) | |
150 | { | |
151 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
152 | s_kobj); | |
153 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
154 | ||
155 | return a->show ? a->show(a, sbi, buf) : 0; | |
156 | } | |
157 | ||
158 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
159 | const char *buf, size_t len) | |
160 | { | |
161 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
162 | s_kobj); | |
163 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
164 | ||
165 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
166 | } | |
167 | ||
168 | static void f2fs_sb_release(struct kobject *kobj) | |
169 | { | |
170 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
171 | s_kobj); | |
172 | complete(&sbi->s_kobj_unregister); | |
173 | } | |
174 | ||
ea91e9b0 | 175 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
176 | static struct f2fs_attr f2fs_attr_##_name = { \ |
177 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
178 | .show = _show, \ | |
179 | .store = _store, \ | |
ea91e9b0 JK |
180 | .struct_type = _struct_type, \ |
181 | .offset = _offset \ | |
b59d0bae NJ |
182 | } |
183 | ||
ea91e9b0 JK |
184 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
185 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
186 | f2fs_sbi_show, f2fs_sbi_store, \ | |
187 | offsetof(struct struct_name, elname)) | |
b59d0bae | 188 | |
ea91e9b0 JK |
189 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
190 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
191 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
192 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
193 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 194 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
195 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
196 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 197 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 198 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 199 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 200 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
201 | |
202 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
203 | static struct attribute *f2fs_attrs[] = { | |
204 | ATTR_LIST(gc_min_sleep_time), | |
205 | ATTR_LIST(gc_max_sleep_time), | |
206 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 207 | ATTR_LIST(gc_idle), |
ea91e9b0 | 208 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 209 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
210 | ATTR_LIST(ipu_policy), |
211 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 212 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 213 | ATTR_LIST(max_victim_search), |
ab9fa662 | 214 | ATTR_LIST(dir_level), |
cdfc41c1 | 215 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
216 | NULL, |
217 | }; | |
218 | ||
219 | static const struct sysfs_ops f2fs_attr_ops = { | |
220 | .show = f2fs_attr_show, | |
221 | .store = f2fs_attr_store, | |
222 | }; | |
223 | ||
224 | static struct kobj_type f2fs_ktype = { | |
225 | .default_attrs = f2fs_attrs, | |
226 | .sysfs_ops = &f2fs_attr_ops, | |
227 | .release = f2fs_sb_release, | |
228 | }; | |
229 | ||
a07ef784 NJ |
230 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
231 | { | |
232 | struct va_format vaf; | |
233 | va_list args; | |
234 | ||
235 | va_start(args, fmt); | |
236 | vaf.fmt = fmt; | |
237 | vaf.va = &args; | |
238 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
239 | va_end(args); | |
240 | } | |
241 | ||
aff063e2 JK |
242 | static void init_once(void *foo) |
243 | { | |
244 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
245 | ||
aff063e2 JK |
246 | inode_init_once(&fi->vfs_inode); |
247 | } | |
248 | ||
696c018c NJ |
249 | static int parse_options(struct super_block *sb, char *options) |
250 | { | |
251 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
252 | substring_t args[MAX_OPT_ARGS]; | |
253 | char *p, *name; | |
254 | int arg = 0; | |
255 | ||
256 | if (!options) | |
257 | return 0; | |
258 | ||
259 | while ((p = strsep(&options, ",")) != NULL) { | |
260 | int token; | |
261 | if (!*p) | |
262 | continue; | |
263 | /* | |
264 | * Initialize args struct so we know whether arg was | |
265 | * found; some options take optional arguments. | |
266 | */ | |
267 | args[0].to = args[0].from = NULL; | |
268 | token = match_token(p, f2fs_tokens, args); | |
269 | ||
270 | switch (token) { | |
271 | case Opt_gc_background: | |
272 | name = match_strdup(&args[0]); | |
273 | ||
274 | if (!name) | |
275 | return -ENOMEM; | |
04c09388 | 276 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 277 | set_opt(sbi, BG_GC); |
04c09388 | 278 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
279 | clear_opt(sbi, BG_GC); |
280 | else { | |
281 | kfree(name); | |
282 | return -EINVAL; | |
283 | } | |
284 | kfree(name); | |
285 | break; | |
286 | case Opt_disable_roll_forward: | |
287 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
288 | break; | |
289 | case Opt_discard: | |
290 | set_opt(sbi, DISCARD); | |
291 | break; | |
292 | case Opt_noheap: | |
293 | set_opt(sbi, NOHEAP); | |
294 | break; | |
295 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
296 | case Opt_user_xattr: |
297 | set_opt(sbi, XATTR_USER); | |
298 | break; | |
696c018c NJ |
299 | case Opt_nouser_xattr: |
300 | clear_opt(sbi, XATTR_USER); | |
301 | break; | |
444c580f JK |
302 | case Opt_inline_xattr: |
303 | set_opt(sbi, INLINE_XATTR); | |
304 | break; | |
696c018c | 305 | #else |
4058c511 KA |
306 | case Opt_user_xattr: |
307 | f2fs_msg(sb, KERN_INFO, | |
308 | "user_xattr options not supported"); | |
309 | break; | |
696c018c NJ |
310 | case Opt_nouser_xattr: |
311 | f2fs_msg(sb, KERN_INFO, | |
312 | "nouser_xattr options not supported"); | |
313 | break; | |
444c580f JK |
314 | case Opt_inline_xattr: |
315 | f2fs_msg(sb, KERN_INFO, | |
316 | "inline_xattr options not supported"); | |
317 | break; | |
696c018c NJ |
318 | #endif |
319 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
320 | case Opt_acl: |
321 | set_opt(sbi, POSIX_ACL); | |
322 | break; | |
696c018c NJ |
323 | case Opt_noacl: |
324 | clear_opt(sbi, POSIX_ACL); | |
325 | break; | |
326 | #else | |
4058c511 KA |
327 | case Opt_acl: |
328 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
329 | break; | |
696c018c NJ |
330 | case Opt_noacl: |
331 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
332 | break; | |
333 | #endif | |
334 | case Opt_active_logs: | |
335 | if (args->from && match_int(args, &arg)) | |
336 | return -EINVAL; | |
337 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
338 | return -EINVAL; | |
339 | sbi->active_logs = arg; | |
340 | break; | |
341 | case Opt_disable_ext_identify: | |
342 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
343 | break; | |
8274de77 HL |
344 | case Opt_inline_data: |
345 | set_opt(sbi, INLINE_DATA); | |
346 | break; | |
5efd3c6f CY |
347 | case Opt_inline_dentry: |
348 | set_opt(sbi, INLINE_DENTRY); | |
349 | break; | |
6b4afdd7 JK |
350 | case Opt_flush_merge: |
351 | set_opt(sbi, FLUSH_MERGE); | |
352 | break; | |
0f7b2abd JK |
353 | case Opt_nobarrier: |
354 | set_opt(sbi, NOBARRIER); | |
355 | break; | |
d5053a34 JK |
356 | case Opt_fastboot: |
357 | set_opt(sbi, FASTBOOT); | |
358 | break; | |
696c018c NJ |
359 | default: |
360 | f2fs_msg(sb, KERN_ERR, | |
361 | "Unrecognized mount option \"%s\" or missing value", | |
362 | p); | |
363 | return -EINVAL; | |
364 | } | |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
aff063e2 JK |
369 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
370 | { | |
371 | struct f2fs_inode_info *fi; | |
372 | ||
a0acdfe0 | 373 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
374 | if (!fi) |
375 | return NULL; | |
376 | ||
377 | init_once((void *) fi); | |
378 | ||
434720fa | 379 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 380 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 381 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
382 | fi->i_current_depth = 1; |
383 | fi->i_advise = 0; | |
384 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 385 | init_rwsem(&fi->i_sem); |
34ba94ba | 386 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
387 | INIT_LIST_HEAD(&fi->inmem_pages); |
388 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
389 | |
390 | set_inode_flag(fi, FI_NEW_INODE); | |
391 | ||
444c580f JK |
392 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
393 | set_inode_flag(fi, FI_INLINE_XATTR); | |
394 | ||
ab9fa662 JK |
395 | /* Will be used by directory only */ |
396 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
397 | ||
aff063e2 JK |
398 | return &fi->vfs_inode; |
399 | } | |
400 | ||
531ad7d5 JK |
401 | static int f2fs_drop_inode(struct inode *inode) |
402 | { | |
403 | /* | |
404 | * This is to avoid a deadlock condition like below. | |
405 | * writeback_single_inode(inode) | |
406 | * - f2fs_write_data_page | |
407 | * - f2fs_gc -> iput -> evict | |
408 | * - inode_wait_for_writeback(inode) | |
409 | */ | |
410 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
411 | return 0; | |
412 | return generic_drop_inode(inode); | |
413 | } | |
414 | ||
b3783873 JK |
415 | /* |
416 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
417 | * | |
418 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
419 | */ | |
420 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
421 | { | |
422 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
423 | } |
424 | ||
aff063e2 JK |
425 | static void f2fs_i_callback(struct rcu_head *head) |
426 | { | |
427 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
428 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
429 | } | |
430 | ||
25ca923b | 431 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
432 | { |
433 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
434 | } | |
435 | ||
436 | static void f2fs_put_super(struct super_block *sb) | |
437 | { | |
438 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
439 | ||
5e176d54 JK |
440 | if (sbi->s_proc) { |
441 | remove_proc_entry("segment_info", sbi->s_proc); | |
442 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
443 | } | |
b59d0bae | 444 | kobject_del(&sbi->s_kobj); |
5e176d54 | 445 | |
aff063e2 JK |
446 | f2fs_destroy_stats(sbi); |
447 | stop_gc_thread(sbi); | |
448 | ||
5887d291 | 449 | /* We don't need to do checkpoint when it's clean */ |
75ab4cb8 JK |
450 | if (sbi->s_dirty) { |
451 | struct cp_control cpc = { | |
452 | .reason = CP_UMOUNT, | |
453 | }; | |
454 | write_checkpoint(sbi, &cpc); | |
455 | } | |
aff063e2 | 456 | |
cf779cab JK |
457 | /* |
458 | * normally superblock is clean, so we need to release this. | |
459 | * In addition, EIO will skip do checkpoint, we need this as well. | |
460 | */ | |
6f12ac25 | 461 | release_dirty_inode(sbi); |
4b2fecc8 | 462 | release_discard_addrs(sbi); |
6f12ac25 | 463 | |
aff063e2 JK |
464 | iput(sbi->node_inode); |
465 | iput(sbi->meta_inode); | |
466 | ||
467 | /* destroy f2fs internal modules */ | |
468 | destroy_node_manager(sbi); | |
469 | destroy_segment_manager(sbi); | |
470 | ||
471 | kfree(sbi->ckpt); | |
b59d0bae NJ |
472 | kobject_put(&sbi->s_kobj); |
473 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
474 | |
475 | sb->s_fs_info = NULL; | |
476 | brelse(sbi->raw_super_buf); | |
477 | kfree(sbi); | |
478 | } | |
479 | ||
480 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
481 | { | |
482 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 483 | |
a2a4a7e4 NJ |
484 | trace_f2fs_sync_fs(sb, sync); |
485 | ||
b7473754 | 486 | if (sync) { |
d5053a34 JK |
487 | struct cp_control cpc; |
488 | ||
489 | cpc.reason = test_opt(sbi, FASTBOOT) ? CP_UMOUNT : CP_SYNC; | |
b7473754 | 490 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 491 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
492 | mutex_unlock(&sbi->gc_mutex); |
493 | } else { | |
7d82db83 | 494 | f2fs_balance_fs(sbi); |
b7473754 | 495 | } |
aff063e2 | 496 | |
64c576fe | 497 | return 0; |
aff063e2 JK |
498 | } |
499 | ||
d6212a5f CL |
500 | static int f2fs_freeze(struct super_block *sb) |
501 | { | |
502 | int err; | |
503 | ||
77888c1e | 504 | if (f2fs_readonly(sb)) |
d6212a5f CL |
505 | return 0; |
506 | ||
507 | err = f2fs_sync_fs(sb, 1); | |
508 | return err; | |
509 | } | |
510 | ||
511 | static int f2fs_unfreeze(struct super_block *sb) | |
512 | { | |
513 | return 0; | |
514 | } | |
515 | ||
aff063e2 JK |
516 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
517 | { | |
518 | struct super_block *sb = dentry->d_sb; | |
519 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
520 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
521 | block_t total_count, user_block_count, start_count, ovp_count; | |
522 | ||
523 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
524 | user_block_count = sbi->user_block_count; | |
525 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
526 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
527 | buf->f_type = F2FS_SUPER_MAGIC; | |
528 | buf->f_bsize = sbi->blocksize; | |
529 | ||
530 | buf->f_blocks = total_count - start_count; | |
531 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
532 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
533 | ||
c200b1aa CY |
534 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
535 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 536 | |
5a20d339 | 537 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
538 | buf->f_fsid.val[0] = (u32)id; |
539 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
544 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
545 | { | |
546 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
547 | ||
b270ad6f | 548 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 549 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 550 | else |
696c018c | 551 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
552 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
553 | seq_puts(seq, ",disable_roll_forward"); | |
554 | if (test_opt(sbi, DISCARD)) | |
555 | seq_puts(seq, ",discard"); | |
556 | if (test_opt(sbi, NOHEAP)) | |
557 | seq_puts(seq, ",no_heap_alloc"); | |
558 | #ifdef CONFIG_F2FS_FS_XATTR | |
559 | if (test_opt(sbi, XATTR_USER)) | |
560 | seq_puts(seq, ",user_xattr"); | |
561 | else | |
562 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
563 | if (test_opt(sbi, INLINE_XATTR)) |
564 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
565 | #endif |
566 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
567 | if (test_opt(sbi, POSIX_ACL)) | |
568 | seq_puts(seq, ",acl"); | |
569 | else | |
570 | seq_puts(seq, ",noacl"); | |
571 | #endif | |
572 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 573 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
574 | if (test_opt(sbi, INLINE_DATA)) |
575 | seq_puts(seq, ",inline_data"); | |
5efd3c6f CY |
576 | if (test_opt(sbi, INLINE_DENTRY)) |
577 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 578 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 579 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
580 | if (test_opt(sbi, NOBARRIER)) |
581 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
582 | if (test_opt(sbi, FASTBOOT)) |
583 | seq_puts(seq, ",fastboot"); | |
aff063e2 JK |
584 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
5e176d54 JK |
589 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
590 | { | |
591 | struct super_block *sb = seq->private; | |
592 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
593 | unsigned int total_segs = |
594 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
595 | int i; |
596 | ||
90aa6dc9 CY |
597 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
598 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
599 | ||
5e176d54 | 600 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
601 | struct seg_entry *se = get_seg_entry(sbi, i); |
602 | ||
603 | if ((i % 10) == 0) | |
604 | seq_printf(seq, "%-5d", i); | |
605 | seq_printf(seq, "%d|%-3u", se->type, | |
606 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
607 | if ((i % 10) == 9 || i == (total_segs - 1)) |
608 | seq_putc(seq, '\n'); | |
5e176d54 | 609 | else |
46c04366 | 610 | seq_putc(seq, ' '); |
5e176d54 | 611 | } |
46c04366 | 612 | |
5e176d54 JK |
613 | return 0; |
614 | } | |
615 | ||
616 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
617 | { | |
618 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
619 | } | |
620 | ||
621 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
622 | .owner = THIS_MODULE, | |
623 | .open = segment_info_open_fs, | |
624 | .read = seq_read, | |
625 | .llseek = seq_lseek, | |
626 | .release = single_release, | |
627 | }; | |
628 | ||
696c018c NJ |
629 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
630 | { | |
631 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
632 | struct f2fs_mount_info org_mount_opt; | |
633 | int err, active_logs; | |
876dc59e GZ |
634 | bool need_restart_gc = false; |
635 | bool need_stop_gc = false; | |
696c018c | 636 | |
02b9984d TT |
637 | sync_filesystem(sb); |
638 | ||
696c018c NJ |
639 | /* |
640 | * Save the old mount options in case we | |
641 | * need to restore them. | |
642 | */ | |
643 | org_mount_opt = sbi->mount_opt; | |
644 | active_logs = sbi->active_logs; | |
645 | ||
26666c8a CY |
646 | sbi->mount_opt.opt = 0; |
647 | sbi->active_logs = NR_CURSEG_TYPE; | |
648 | ||
696c018c NJ |
649 | /* parse mount options */ |
650 | err = parse_options(sb, data); | |
651 | if (err) | |
652 | goto restore_opts; | |
653 | ||
654 | /* | |
655 | * Previous and new state of filesystem is RO, | |
876dc59e | 656 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 657 | */ |
6b2920a5 | 658 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
659 | goto skip; |
660 | ||
661 | /* | |
662 | * We stop the GC thread if FS is mounted as RO | |
663 | * or if background_gc = off is passed in mount | |
664 | * option. Also sync the filesystem. | |
665 | */ | |
666 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
667 | if (sbi->gc_thread) { | |
668 | stop_gc_thread(sbi); | |
669 | f2fs_sync_fs(sb, 1); | |
876dc59e | 670 | need_restart_gc = true; |
696c018c | 671 | } |
aba291b3 | 672 | } else if (!sbi->gc_thread) { |
696c018c NJ |
673 | err = start_gc_thread(sbi); |
674 | if (err) | |
675 | goto restore_opts; | |
876dc59e GZ |
676 | need_stop_gc = true; |
677 | } | |
678 | ||
679 | /* | |
680 | * We stop issue flush thread if FS is mounted as RO | |
681 | * or if flush_merge is not passed in mount option. | |
682 | */ | |
683 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 684 | destroy_flush_cmd_control(sbi); |
aba291b3 | 685 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
686 | err = create_flush_cmd_control(sbi); |
687 | if (err) | |
a688b9d9 | 688 | goto restore_gc; |
696c018c NJ |
689 | } |
690 | skip: | |
691 | /* Update the POSIXACL Flag */ | |
692 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
693 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
694 | return 0; | |
876dc59e GZ |
695 | restore_gc: |
696 | if (need_restart_gc) { | |
697 | if (start_gc_thread(sbi)) | |
698 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 699 | "background gc thread has stopped"); |
876dc59e GZ |
700 | } else if (need_stop_gc) { |
701 | stop_gc_thread(sbi); | |
702 | } | |
696c018c NJ |
703 | restore_opts: |
704 | sbi->mount_opt = org_mount_opt; | |
705 | sbi->active_logs = active_logs; | |
706 | return err; | |
707 | } | |
708 | ||
aff063e2 JK |
709 | static struct super_operations f2fs_sops = { |
710 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 711 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
712 | .destroy_inode = f2fs_destroy_inode, |
713 | .write_inode = f2fs_write_inode, | |
b3783873 | 714 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
715 | .show_options = f2fs_show_options, |
716 | .evict_inode = f2fs_evict_inode, | |
717 | .put_super = f2fs_put_super, | |
718 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
719 | .freeze_fs = f2fs_freeze, |
720 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 721 | .statfs = f2fs_statfs, |
696c018c | 722 | .remount_fs = f2fs_remount, |
aff063e2 JK |
723 | }; |
724 | ||
725 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
726 | u64 ino, u32 generation) | |
727 | { | |
728 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
729 | struct inode *inode; | |
730 | ||
d6b7d4b3 | 731 | if (check_nid_range(sbi, ino)) |
910bb12d | 732 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
733 | |
734 | /* | |
735 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
736 | * However f2fs_iget currently does appropriate checks to handle stale | |
737 | * inodes so everything is OK. | |
738 | */ | |
739 | inode = f2fs_iget(sb, ino); | |
740 | if (IS_ERR(inode)) | |
741 | return ERR_CAST(inode); | |
6bacf52f | 742 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
743 | /* we didn't find the right inode.. */ |
744 | iput(inode); | |
745 | return ERR_PTR(-ESTALE); | |
746 | } | |
747 | return inode; | |
748 | } | |
749 | ||
750 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
751 | int fh_len, int fh_type) | |
752 | { | |
753 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
754 | f2fs_nfs_get_inode); | |
755 | } | |
756 | ||
757 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
758 | int fh_len, int fh_type) | |
759 | { | |
760 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
761 | f2fs_nfs_get_inode); | |
762 | } | |
763 | ||
764 | static const struct export_operations f2fs_export_ops = { | |
765 | .fh_to_dentry = f2fs_fh_to_dentry, | |
766 | .fh_to_parent = f2fs_fh_to_parent, | |
767 | .get_parent = f2fs_get_parent, | |
768 | }; | |
769 | ||
aff063e2 JK |
770 | static loff_t max_file_size(unsigned bits) |
771 | { | |
de93653f | 772 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
773 | loff_t leaf_count = ADDRS_PER_BLOCK; |
774 | ||
775 | /* two direct node blocks */ | |
776 | result += (leaf_count * 2); | |
777 | ||
778 | /* two indirect node blocks */ | |
779 | leaf_count *= NIDS_PER_BLOCK; | |
780 | result += (leaf_count * 2); | |
781 | ||
782 | /* one double indirect node block */ | |
783 | leaf_count *= NIDS_PER_BLOCK; | |
784 | result += leaf_count; | |
785 | ||
786 | result <<= bits; | |
787 | return result; | |
788 | } | |
789 | ||
a07ef784 NJ |
790 | static int sanity_check_raw_super(struct super_block *sb, |
791 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
792 | { |
793 | unsigned int blocksize; | |
794 | ||
a07ef784 NJ |
795 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
796 | f2fs_msg(sb, KERN_INFO, | |
797 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
798 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 799 | return 1; |
a07ef784 | 800 | } |
aff063e2 | 801 | |
5c9b4692 | 802 | /* Currently, support only 4KB page cache size */ |
803 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
804 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 805 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 806 | PAGE_CACHE_SIZE); |
807 | return 1; | |
808 | } | |
809 | ||
aff063e2 JK |
810 | /* Currently, support only 4KB block size */ |
811 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 812 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
813 | f2fs_msg(sb, KERN_INFO, |
814 | "Invalid blocksize (%u), supports only 4KB\n", | |
815 | blocksize); | |
aff063e2 | 816 | return 1; |
a07ef784 | 817 | } |
5c9b4692 | 818 | |
55cf9cb6 CY |
819 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
820 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
821 | F2FS_MAX_LOG_SECTOR_SIZE || | |
822 | le32_to_cpu(raw_super->log_sectorsize) < | |
823 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
824 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
825 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 826 | return 1; |
a07ef784 | 827 | } |
55cf9cb6 CY |
828 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
829 | le32_to_cpu(raw_super->log_sectorsize) != | |
830 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
831 | f2fs_msg(sb, KERN_INFO, | |
832 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
833 | le32_to_cpu(raw_super->log_sectors_per_block), | |
834 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 835 | return 1; |
a07ef784 | 836 | } |
aff063e2 JK |
837 | return 0; |
838 | } | |
839 | ||
577e3495 | 840 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
841 | { |
842 | unsigned int total, fsmeta; | |
577e3495 JK |
843 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
844 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
845 | |
846 | total = le32_to_cpu(raw_super->segment_count); | |
847 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
848 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
849 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
850 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
851 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
852 | ||
6bacf52f | 853 | if (unlikely(fsmeta >= total)) |
aff063e2 | 854 | return 1; |
577e3495 | 855 | |
1e968fdf | 856 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
857 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
858 | return 1; | |
859 | } | |
aff063e2 JK |
860 | return 0; |
861 | } | |
862 | ||
863 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
864 | { | |
865 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
866 | int i; | |
867 | ||
868 | sbi->log_sectors_per_block = | |
869 | le32_to_cpu(raw_super->log_sectors_per_block); | |
870 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
871 | sbi->blocksize = 1 << sbi->log_blocksize; | |
872 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
873 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
874 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
875 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
876 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
877 | sbi->total_node_count = | |
878 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
879 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
880 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
881 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
882 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 883 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 884 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
885 | |
886 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
887 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
888 | |
889 | sbi->dir_level = DEF_DIR_LEVEL; | |
2ae4c673 | 890 | sbi->need_fsck = false; |
aff063e2 JK |
891 | } |
892 | ||
9076a75f GZ |
893 | /* |
894 | * Read f2fs raw super block. | |
895 | * Because we have two copies of super block, so read the first one at first, | |
896 | * if the first one is invalid, move to read the second one. | |
897 | */ | |
898 | static int read_raw_super_block(struct super_block *sb, | |
899 | struct f2fs_super_block **raw_super, | |
900 | struct buffer_head **raw_super_buf) | |
14d7e9de | 901 | { |
9076a75f | 902 | int block = 0; |
14d7e9de | 903 | |
9076a75f | 904 | retry: |
14d7e9de | 905 | *raw_super_buf = sb_bread(sb, block); |
906 | if (!*raw_super_buf) { | |
9076a75f GZ |
907 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
908 | block + 1); | |
909 | if (block == 0) { | |
910 | block++; | |
911 | goto retry; | |
912 | } else { | |
913 | return -EIO; | |
914 | } | |
14d7e9de | 915 | } |
916 | ||
917 | *raw_super = (struct f2fs_super_block *) | |
918 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
919 | ||
920 | /* sanity checking of raw super */ | |
9076a75f GZ |
921 | if (sanity_check_raw_super(sb, *raw_super)) { |
922 | brelse(*raw_super_buf); | |
6c311ec6 CF |
923 | f2fs_msg(sb, KERN_ERR, |
924 | "Can't find valid F2FS filesystem in %dth superblock", | |
925 | block + 1); | |
6bacf52f | 926 | if (block == 0) { |
9076a75f GZ |
927 | block++; |
928 | goto retry; | |
929 | } else { | |
930 | return -EINVAL; | |
931 | } | |
932 | } | |
14d7e9de | 933 | |
9076a75f | 934 | return 0; |
14d7e9de | 935 | } |
936 | ||
aff063e2 JK |
937 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
938 | { | |
939 | struct f2fs_sb_info *sbi; | |
1730663c | 940 | struct f2fs_super_block *raw_super = NULL; |
aff063e2 JK |
941 | struct buffer_head *raw_super_buf; |
942 | struct inode *root; | |
943 | long err = -EINVAL; | |
ed2e621a | 944 | bool retry = true; |
971767ca | 945 | int i; |
aff063e2 | 946 | |
ed2e621a | 947 | try_onemore: |
aff063e2 JK |
948 | /* allocate memory for f2fs-specific super block info */ |
949 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
950 | if (!sbi) | |
951 | return -ENOMEM; | |
952 | ||
ff9234ad | 953 | /* set a block size */ |
6bacf52f | 954 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 955 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 956 | goto free_sbi; |
a07ef784 | 957 | } |
aff063e2 | 958 | |
9076a75f GZ |
959 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
960 | if (err) | |
961 | goto free_sbi; | |
962 | ||
5fb08372 | 963 | sb->s_fs_info = sbi; |
aff063e2 JK |
964 | /* init some FS parameters */ |
965 | sbi->active_logs = NR_CURSEG_TYPE; | |
966 | ||
967 | set_opt(sbi, BG_GC); | |
968 | ||
969 | #ifdef CONFIG_F2FS_FS_XATTR | |
970 | set_opt(sbi, XATTR_USER); | |
971 | #endif | |
972 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
973 | set_opt(sbi, POSIX_ACL); | |
974 | #endif | |
975 | /* parse mount options */ | |
5fb08372 | 976 | err = parse_options(sb, (char *)data); |
66348b72 | 977 | if (err) |
aff063e2 JK |
978 | goto free_sb_buf; |
979 | ||
25ca923b | 980 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
981 | sb->s_max_links = F2FS_LINK_MAX; |
982 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
983 | ||
984 | sb->s_op = &f2fs_sops; | |
985 | sb->s_xattr = f2fs_xattr_handlers; | |
986 | sb->s_export_op = &f2fs_export_ops; | |
987 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
988 | sb->s_time_gran = 1; |
989 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
990 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
991 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
992 | ||
993 | /* init f2fs-specific super block info */ | |
994 | sbi->sb = sb; | |
995 | sbi->raw_super = raw_super; | |
996 | sbi->raw_super_buf = raw_super_buf; | |
997 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
998 | mutex_init(&sbi->writepages); |
999 | mutex_init(&sbi->cp_mutex); | |
b3582c68 | 1000 | init_rwsem(&sbi->node_write); |
aabe5136 | 1001 | sbi->por_doing = false; |
aff063e2 | 1002 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1003 | |
df0f8dc0 | 1004 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1005 | sbi->read_io.sbi = sbi; |
1006 | sbi->read_io.bio = NULL; | |
1007 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1008 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1009 | sbi->write_io[i].sbi = sbi; |
1010 | sbi->write_io[i].bio = NULL; | |
1011 | } | |
971767ca | 1012 | |
e479556b | 1013 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1014 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1015 | init_sb_info(sbi); |
1016 | ||
1017 | /* get an inode for meta space */ | |
1018 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1019 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1020 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
1021 | err = PTR_ERR(sbi->meta_inode); |
1022 | goto free_sb_buf; | |
1023 | } | |
1024 | ||
1025 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1026 | if (err) { |
1027 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1028 | goto free_meta_inode; |
a07ef784 | 1029 | } |
aff063e2 JK |
1030 | |
1031 | /* sanity checking of checkpoint */ | |
1032 | err = -EINVAL; | |
577e3495 | 1033 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1034 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1035 | goto free_cp; |
a07ef784 | 1036 | } |
aff063e2 JK |
1037 | |
1038 | sbi->total_valid_node_count = | |
1039 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1040 | sbi->total_valid_inode_count = | |
1041 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1042 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1043 | sbi->total_valid_block_count = | |
1044 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1045 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1046 | sbi->alloc_valid_block_count = 0; | |
1047 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1048 | spin_lock_init(&sbi->dir_inode_lock); | |
1049 | ||
6451e041 | 1050 | init_ino_entry_info(sbi); |
aff063e2 JK |
1051 | |
1052 | /* setup f2fs internal modules */ | |
1053 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1054 | if (err) { |
1055 | f2fs_msg(sb, KERN_ERR, | |
1056 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1057 | goto free_sm; |
a07ef784 | 1058 | } |
aff063e2 | 1059 | err = build_node_manager(sbi); |
a07ef784 NJ |
1060 | if (err) { |
1061 | f2fs_msg(sb, KERN_ERR, | |
1062 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1063 | goto free_nm; |
a07ef784 | 1064 | } |
aff063e2 JK |
1065 | |
1066 | build_gc_manager(sbi); | |
1067 | ||
1068 | /* get an inode for node space */ | |
1069 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1070 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1071 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1072 | err = PTR_ERR(sbi->node_inode); |
1073 | goto free_nm; | |
1074 | } | |
1075 | ||
1076 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1077 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1078 | |
1079 | /* read root inode and dentry */ | |
1080 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1081 | if (IS_ERR(root)) { | |
a07ef784 | 1082 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1083 | err = PTR_ERR(root); |
1084 | goto free_node_inode; | |
1085 | } | |
8f99a946 | 1086 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1087 | iput(root); |
8f99a946 | 1088 | err = -EINVAL; |
9d847950 | 1089 | goto free_node_inode; |
8f99a946 | 1090 | } |
aff063e2 JK |
1091 | |
1092 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1093 | if (!sb->s_root) { | |
1094 | err = -ENOMEM; | |
1095 | goto free_root_inode; | |
1096 | } | |
1097 | ||
aff063e2 JK |
1098 | err = f2fs_build_stats(sbi); |
1099 | if (err) | |
6437d1b0 | 1100 | goto free_root_inode; |
aff063e2 | 1101 | |
5e176d54 JK |
1102 | if (f2fs_proc_root) |
1103 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1104 | ||
1105 | if (sbi->s_proc) | |
1106 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1107 | &f2fs_seq_segment_info_fops, sb); | |
1108 | ||
d3ee456d NJ |
1109 | if (test_opt(sbi, DISCARD)) { |
1110 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1111 | if (!blk_queue_discard(q)) | |
1112 | f2fs_msg(sb, KERN_WARNING, | |
1113 | "mounting with \"discard\" option, but " | |
1114 | "the device does not support discard"); | |
1115 | } | |
1116 | ||
b59d0bae NJ |
1117 | sbi->s_kobj.kset = f2fs_kset; |
1118 | init_completion(&sbi->s_kobj_unregister); | |
1119 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1120 | "%s", sb->s_id); | |
1121 | if (err) | |
6437d1b0 | 1122 | goto free_proc; |
b59d0bae | 1123 | |
b0c44f05 JK |
1124 | if (!retry) |
1125 | sbi->need_fsck = true; | |
1126 | ||
6437d1b0 JK |
1127 | /* recover fsynced data */ |
1128 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1129 | err = recover_fsync_data(sbi); | |
ed2e621a | 1130 | if (err) { |
6437d1b0 JK |
1131 | f2fs_msg(sb, KERN_ERR, |
1132 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1133 | goto free_kobj; |
1134 | } | |
6437d1b0 | 1135 | } |
b59d0bae | 1136 | |
6437d1b0 JK |
1137 | /* |
1138 | * If filesystem is not mounted as read-only then | |
1139 | * do start the gc_thread. | |
1140 | */ | |
6c029932 | 1141 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1142 | /* After POR, we can run background GC thread.*/ |
1143 | err = start_gc_thread(sbi); | |
1144 | if (err) | |
1145 | goto free_kobj; | |
1146 | } | |
aff063e2 | 1147 | return 0; |
6437d1b0 JK |
1148 | |
1149 | free_kobj: | |
1150 | kobject_del(&sbi->s_kobj); | |
1151 | free_proc: | |
1d15bd20 CY |
1152 | if (sbi->s_proc) { |
1153 | remove_proc_entry("segment_info", sbi->s_proc); | |
1154 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1155 | } | |
1156 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1157 | free_root_inode: |
1158 | dput(sb->s_root); | |
1159 | sb->s_root = NULL; | |
1160 | free_node_inode: | |
1161 | iput(sbi->node_inode); | |
1162 | free_nm: | |
1163 | destroy_node_manager(sbi); | |
1164 | free_sm: | |
1165 | destroy_segment_manager(sbi); | |
1166 | free_cp: | |
1167 | kfree(sbi->ckpt); | |
1168 | free_meta_inode: | |
1169 | make_bad_inode(sbi->meta_inode); | |
1170 | iput(sbi->meta_inode); | |
1171 | free_sb_buf: | |
1172 | brelse(raw_super_buf); | |
1173 | free_sbi: | |
1174 | kfree(sbi); | |
ed2e621a JK |
1175 | |
1176 | /* give only one another chance */ | |
1177 | if (retry) { | |
922cedbd | 1178 | retry = 0; |
ed2e621a JK |
1179 | shrink_dcache_sb(sb); |
1180 | goto try_onemore; | |
1181 | } | |
aff063e2 JK |
1182 | return err; |
1183 | } | |
1184 | ||
1185 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1186 | const char *dev_name, void *data) | |
1187 | { | |
1188 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1189 | } | |
1190 | ||
1191 | static struct file_system_type f2fs_fs_type = { | |
1192 | .owner = THIS_MODULE, | |
1193 | .name = "f2fs", | |
1194 | .mount = f2fs_mount, | |
1195 | .kill_sb = kill_block_super, | |
1196 | .fs_flags = FS_REQUIRES_DEV, | |
1197 | }; | |
7f78e035 | 1198 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1199 | |
6e6093a8 | 1200 | static int __init init_inodecache(void) |
aff063e2 JK |
1201 | { |
1202 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1203 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1204 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1205 | return -ENOMEM; |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | static void destroy_inodecache(void) | |
1210 | { | |
1211 | /* | |
1212 | * Make sure all delayed rcu free inodes are flushed before we | |
1213 | * destroy cache. | |
1214 | */ | |
1215 | rcu_barrier(); | |
1216 | kmem_cache_destroy(f2fs_inode_cachep); | |
1217 | } | |
1218 | ||
1219 | static int __init init_f2fs_fs(void) | |
1220 | { | |
1221 | int err; | |
1222 | ||
1223 | err = init_inodecache(); | |
1224 | if (err) | |
1225 | goto fail; | |
1226 | err = create_node_manager_caches(); | |
1227 | if (err) | |
9890ff3f | 1228 | goto free_inodecache; |
7fd9e544 | 1229 | err = create_segment_manager_caches(); |
aff063e2 | 1230 | if (err) |
9890ff3f | 1231 | goto free_node_manager_caches; |
7fd9e544 JK |
1232 | err = create_gc_caches(); |
1233 | if (err) | |
1234 | goto free_segment_manager_caches; | |
aff063e2 JK |
1235 | err = create_checkpoint_caches(); |
1236 | if (err) | |
9890ff3f | 1237 | goto free_gc_caches; |
b59d0bae | 1238 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1239 | if (!f2fs_kset) { |
1240 | err = -ENOMEM; | |
9890ff3f | 1241 | goto free_checkpoint_caches; |
6e6b978c | 1242 | } |
4589d25d NJ |
1243 | err = register_filesystem(&f2fs_fs_type); |
1244 | if (err) | |
9890ff3f | 1245 | goto free_kset; |
4589d25d | 1246 | f2fs_create_root_stats(); |
5e176d54 | 1247 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1248 | return 0; |
1249 | ||
1250 | free_kset: | |
1251 | kset_unregister(f2fs_kset); | |
1252 | free_checkpoint_caches: | |
1253 | destroy_checkpoint_caches(); | |
1254 | free_gc_caches: | |
1255 | destroy_gc_caches(); | |
7fd9e544 JK |
1256 | free_segment_manager_caches: |
1257 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1258 | free_node_manager_caches: |
1259 | destroy_node_manager_caches(); | |
1260 | free_inodecache: | |
1261 | destroy_inodecache(); | |
aff063e2 JK |
1262 | fail: |
1263 | return err; | |
1264 | } | |
1265 | ||
1266 | static void __exit exit_f2fs_fs(void) | |
1267 | { | |
5e176d54 | 1268 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1269 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1270 | unregister_filesystem(&f2fs_fs_type); |
1271 | destroy_checkpoint_caches(); | |
1272 | destroy_gc_caches(); | |
5dcd8a71 | 1273 | destroy_segment_manager_caches(); |
aff063e2 JK |
1274 | destroy_node_manager_caches(); |
1275 | destroy_inodecache(); | |
b59d0bae | 1276 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1277 | } |
1278 | ||
1279 | module_init(init_f2fs_fs) | |
1280 | module_exit(exit_f2fs_fs) | |
1281 | ||
1282 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1283 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1284 | MODULE_LICENSE("GPL"); |