Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1 | /* |
| 2 | * fs/f2fs/super.c |
| 3 | * |
| 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com/ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/statfs.h> |
| 15 | #include <linux/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> |
| 21 | #include <linux/proc_fs.h> |
| 22 | #include <linux/random.h> |
| 23 | #include <linux/exportfs.h> |
| 24 | #include <linux/blkdev.h> |
| 25 | #include <linux/f2fs_fs.h> |
| 26 | #include <linux/sysfs.h> |
| 27 | |
| 28 | #include "f2fs.h" |
| 29 | #include "node.h" |
| 30 | #include "segment.h" |
| 31 | #include "xattr.h" |
| 32 | #include "gc.h" |
| 33 | #include "trace.h" |
| 34 | |
| 35 | #define CREATE_TRACE_POINTS |
| 36 | #include <trace/events/f2fs.h> |
| 37 | |
| 38 | static struct proc_dir_entry *f2fs_proc_root; |
| 39 | static struct kmem_cache *f2fs_inode_cachep; |
| 40 | static struct kset *f2fs_kset; |
| 41 | |
| 42 | /* f2fs-wide shrinker description */ |
| 43 | static struct shrinker f2fs_shrinker_info = { |
| 44 | .shrink = f2fs_shrink_scan, |
| 45 | .seeks = DEFAULT_SEEKS, |
| 46 | }; |
| 47 | |
| 48 | enum { |
| 49 | Opt_gc_background, |
| 50 | Opt_disable_roll_forward, |
| 51 | Opt_norecovery, |
| 52 | Opt_discard, |
| 53 | Opt_noheap, |
| 54 | Opt_user_xattr, |
| 55 | Opt_nouser_xattr, |
| 56 | Opt_acl, |
| 57 | Opt_noacl, |
| 58 | Opt_active_logs, |
| 59 | Opt_disable_ext_identify, |
| 60 | Opt_inline_xattr, |
| 61 | Opt_inline_data, |
| 62 | Opt_inline_dentry, |
| 63 | Opt_flush_merge, |
| 64 | Opt_nobarrier, |
| 65 | Opt_fastboot, |
| 66 | Opt_extent_cache, |
| 67 | Opt_noextent_cache, |
| 68 | Opt_noinline_data, |
Chao Yu | 45c1c14 | 2015-12-16 13:12:16 +0800 | [diff] [blame^] | 69 | Opt_data_flush, |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 70 | Opt_err, |
| 71 | }; |
| 72 | |
| 73 | static match_table_t f2fs_tokens = { |
| 74 | {Opt_gc_background, "background_gc=%s"}, |
| 75 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
| 76 | {Opt_norecovery, "norecovery"}, |
| 77 | {Opt_discard, "discard"}, |
| 78 | {Opt_noheap, "no_heap"}, |
| 79 | {Opt_user_xattr, "user_xattr"}, |
| 80 | {Opt_nouser_xattr, "nouser_xattr"}, |
| 81 | {Opt_acl, "acl"}, |
| 82 | {Opt_noacl, "noacl"}, |
| 83 | {Opt_active_logs, "active_logs=%u"}, |
| 84 | {Opt_disable_ext_identify, "disable_ext_identify"}, |
| 85 | {Opt_inline_xattr, "inline_xattr"}, |
| 86 | {Opt_inline_data, "inline_data"}, |
| 87 | {Opt_inline_dentry, "inline_dentry"}, |
| 88 | {Opt_flush_merge, "flush_merge"}, |
| 89 | {Opt_nobarrier, "nobarrier"}, |
| 90 | {Opt_fastboot, "fastboot"}, |
| 91 | {Opt_extent_cache, "extent_cache"}, |
| 92 | {Opt_noextent_cache, "noextent_cache"}, |
| 93 | {Opt_noinline_data, "noinline_data"}, |
Chao Yu | 45c1c14 | 2015-12-16 13:12:16 +0800 | [diff] [blame^] | 94 | {Opt_data_flush, "data_flush"}, |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 95 | {Opt_err, NULL}, |
| 96 | }; |
| 97 | |
| 98 | /* Sysfs support for f2fs */ |
| 99 | enum { |
| 100 | GC_THREAD, /* struct f2fs_gc_thread */ |
| 101 | SM_INFO, /* struct f2fs_sm_info */ |
| 102 | NM_INFO, /* struct f2fs_nm_info */ |
| 103 | F2FS_SBI, /* struct f2fs_sb_info */ |
| 104 | }; |
| 105 | |
| 106 | struct f2fs_attr { |
| 107 | struct attribute attr; |
| 108 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); |
| 109 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, |
| 110 | const char *, size_t); |
| 111 | int struct_type; |
| 112 | int offset; |
| 113 | }; |
| 114 | |
| 115 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
| 116 | { |
| 117 | if (struct_type == GC_THREAD) |
| 118 | return (unsigned char *)sbi->gc_thread; |
| 119 | else if (struct_type == SM_INFO) |
| 120 | return (unsigned char *)SM_I(sbi); |
| 121 | else if (struct_type == NM_INFO) |
| 122 | return (unsigned char *)NM_I(sbi); |
| 123 | else if (struct_type == F2FS_SBI) |
| 124 | return (unsigned char *)sbi; |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
| 129 | struct f2fs_sb_info *sbi, char *buf) |
| 130 | { |
| 131 | unsigned char *ptr = NULL; |
| 132 | unsigned int *ui; |
| 133 | |
| 134 | ptr = __struct_ptr(sbi, a->struct_type); |
| 135 | if (!ptr) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | ui = (unsigned int *)(ptr + a->offset); |
| 139 | |
| 140 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); |
| 141 | } |
| 142 | |
| 143 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, |
| 144 | struct f2fs_sb_info *sbi, |
| 145 | const char *buf, size_t count) |
| 146 | { |
| 147 | unsigned char *ptr; |
| 148 | unsigned long t; |
| 149 | unsigned int *ui; |
| 150 | ssize_t ret; |
| 151 | |
| 152 | ptr = __struct_ptr(sbi, a->struct_type); |
| 153 | if (!ptr) |
| 154 | return -EINVAL; |
| 155 | |
| 156 | ui = (unsigned int *)(ptr + a->offset); |
| 157 | |
| 158 | ret = kstrtoul(skip_spaces(buf), 0, &t); |
| 159 | if (ret < 0) |
| 160 | return ret; |
| 161 | *ui = t; |
| 162 | return count; |
| 163 | } |
| 164 | |
| 165 | static ssize_t f2fs_attr_show(struct kobject *kobj, |
| 166 | struct attribute *attr, char *buf) |
| 167 | { |
| 168 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, |
| 169 | s_kobj); |
| 170 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); |
| 171 | |
| 172 | return a->show ? a->show(a, sbi, buf) : 0; |
| 173 | } |
| 174 | |
| 175 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, |
| 176 | const char *buf, size_t len) |
| 177 | { |
| 178 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, |
| 179 | s_kobj); |
| 180 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); |
| 181 | |
| 182 | return a->store ? a->store(a, sbi, buf, len) : 0; |
| 183 | } |
| 184 | |
| 185 | static void f2fs_sb_release(struct kobject *kobj) |
| 186 | { |
| 187 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, |
| 188 | s_kobj); |
| 189 | complete(&sbi->s_kobj_unregister); |
| 190 | } |
| 191 | |
| 192 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
| 193 | static struct f2fs_attr f2fs_attr_##_name = { \ |
| 194 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
| 195 | .show = _show, \ |
| 196 | .store = _store, \ |
| 197 | .struct_type = _struct_type, \ |
| 198 | .offset = _offset \ |
| 199 | } |
| 200 | |
| 201 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
| 202 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ |
| 203 | f2fs_sbi_show, f2fs_sbi_store, \ |
| 204 | offsetof(struct struct_name, elname)) |
| 205 | |
| 206 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
| 207 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); |
| 208 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); |
| 209 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); |
| 210 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); |
| 211 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
| 212 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); |
| 213 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
| 214 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); |
| 215 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
| 216 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
| 217 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); |
| 218 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
| 219 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
| 220 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, cp_interval); |
| 221 | |
| 222 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) |
| 223 | static struct attribute *f2fs_attrs[] = { |
| 224 | ATTR_LIST(gc_min_sleep_time), |
| 225 | ATTR_LIST(gc_max_sleep_time), |
| 226 | ATTR_LIST(gc_no_gc_sleep_time), |
| 227 | ATTR_LIST(gc_idle), |
| 228 | ATTR_LIST(reclaim_segments), |
| 229 | ATTR_LIST(max_small_discards), |
| 230 | ATTR_LIST(batched_trim_sections), |
| 231 | ATTR_LIST(ipu_policy), |
| 232 | ATTR_LIST(min_ipu_util), |
| 233 | ATTR_LIST(min_fsync_blocks), |
| 234 | ATTR_LIST(max_victim_search), |
| 235 | ATTR_LIST(dir_level), |
| 236 | ATTR_LIST(ram_thresh), |
| 237 | ATTR_LIST(ra_nid_pages), |
| 238 | ATTR_LIST(cp_interval), |
| 239 | NULL, |
| 240 | }; |
| 241 | |
| 242 | static const struct sysfs_ops f2fs_attr_ops = { |
| 243 | .show = f2fs_attr_show, |
| 244 | .store = f2fs_attr_store, |
| 245 | }; |
| 246 | |
| 247 | static struct kobj_type f2fs_ktype = { |
| 248 | .default_attrs = f2fs_attrs, |
| 249 | .sysfs_ops = &f2fs_attr_ops, |
| 250 | .release = f2fs_sb_release, |
| 251 | }; |
| 252 | |
| 253 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
| 254 | { |
| 255 | struct va_format vaf; |
| 256 | va_list args; |
| 257 | |
| 258 | va_start(args, fmt); |
| 259 | vaf.fmt = fmt; |
| 260 | vaf.va = &args; |
| 261 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); |
| 262 | va_end(args); |
| 263 | } |
| 264 | |
| 265 | static void init_once(void *foo) |
| 266 | { |
| 267 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; |
| 268 | |
| 269 | inode_init_once(&fi->vfs_inode); |
| 270 | } |
| 271 | |
| 272 | static int parse_options(struct super_block *sb, char *options) |
| 273 | { |
| 274 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 275 | struct request_queue *q; |
| 276 | substring_t args[MAX_OPT_ARGS]; |
| 277 | char *p, *name; |
| 278 | int arg = 0; |
| 279 | |
| 280 | if (!options) |
| 281 | return 0; |
| 282 | |
| 283 | while ((p = strsep(&options, ",")) != NULL) { |
| 284 | int token; |
| 285 | if (!*p) |
| 286 | continue; |
| 287 | /* |
| 288 | * Initialize args struct so we know whether arg was |
| 289 | * found; some options take optional arguments. |
| 290 | */ |
| 291 | args[0].to = args[0].from = NULL; |
| 292 | token = match_token(p, f2fs_tokens, args); |
| 293 | |
| 294 | switch (token) { |
| 295 | case Opt_gc_background: |
| 296 | name = match_strdup(&args[0]); |
| 297 | |
| 298 | if (!name) |
| 299 | return -ENOMEM; |
| 300 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) { |
| 301 | set_opt(sbi, BG_GC); |
| 302 | clear_opt(sbi, FORCE_FG_GC); |
| 303 | } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) { |
| 304 | clear_opt(sbi, BG_GC); |
| 305 | clear_opt(sbi, FORCE_FG_GC); |
| 306 | } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) { |
| 307 | set_opt(sbi, BG_GC); |
| 308 | set_opt(sbi, FORCE_FG_GC); |
| 309 | } else { |
| 310 | kfree(name); |
| 311 | return -EINVAL; |
| 312 | } |
| 313 | kfree(name); |
| 314 | break; |
| 315 | case Opt_disable_roll_forward: |
| 316 | set_opt(sbi, DISABLE_ROLL_FORWARD); |
| 317 | break; |
| 318 | case Opt_norecovery: |
| 319 | /* this option mounts f2fs with ro */ |
| 320 | set_opt(sbi, DISABLE_ROLL_FORWARD); |
| 321 | if (!f2fs_readonly(sb)) |
| 322 | return -EINVAL; |
| 323 | break; |
| 324 | case Opt_discard: |
| 325 | q = bdev_get_queue(sb->s_bdev); |
| 326 | if (blk_queue_discard(q)) { |
| 327 | set_opt(sbi, DISCARD); |
| 328 | } else { |
| 329 | f2fs_msg(sb, KERN_WARNING, |
| 330 | "mounting with \"discard\" option, but " |
| 331 | "the device does not support discard"); |
| 332 | } |
| 333 | break; |
| 334 | case Opt_noheap: |
| 335 | set_opt(sbi, NOHEAP); |
| 336 | break; |
| 337 | #ifdef CONFIG_F2FS_FS_XATTR |
| 338 | case Opt_user_xattr: |
| 339 | set_opt(sbi, XATTR_USER); |
| 340 | break; |
| 341 | case Opt_nouser_xattr: |
| 342 | clear_opt(sbi, XATTR_USER); |
| 343 | break; |
| 344 | case Opt_inline_xattr: |
| 345 | set_opt(sbi, INLINE_XATTR); |
| 346 | break; |
| 347 | #else |
| 348 | case Opt_user_xattr: |
| 349 | f2fs_msg(sb, KERN_INFO, |
| 350 | "user_xattr options not supported"); |
| 351 | break; |
| 352 | case Opt_nouser_xattr: |
| 353 | f2fs_msg(sb, KERN_INFO, |
| 354 | "nouser_xattr options not supported"); |
| 355 | break; |
| 356 | case Opt_inline_xattr: |
| 357 | f2fs_msg(sb, KERN_INFO, |
| 358 | "inline_xattr options not supported"); |
| 359 | break; |
| 360 | #endif |
| 361 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 362 | case Opt_acl: |
| 363 | set_opt(sbi, POSIX_ACL); |
| 364 | break; |
| 365 | case Opt_noacl: |
| 366 | clear_opt(sbi, POSIX_ACL); |
| 367 | break; |
| 368 | #else |
| 369 | case Opt_acl: |
| 370 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); |
| 371 | break; |
| 372 | case Opt_noacl: |
| 373 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); |
| 374 | break; |
| 375 | #endif |
| 376 | case Opt_active_logs: |
| 377 | if (args->from && match_int(args, &arg)) |
| 378 | return -EINVAL; |
| 379 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) |
| 380 | return -EINVAL; |
| 381 | sbi->active_logs = arg; |
| 382 | break; |
| 383 | case Opt_disable_ext_identify: |
| 384 | set_opt(sbi, DISABLE_EXT_IDENTIFY); |
| 385 | break; |
| 386 | case Opt_inline_data: |
| 387 | set_opt(sbi, INLINE_DATA); |
| 388 | break; |
| 389 | case Opt_inline_dentry: |
| 390 | set_opt(sbi, INLINE_DENTRY); |
| 391 | break; |
| 392 | case Opt_flush_merge: |
| 393 | set_opt(sbi, FLUSH_MERGE); |
| 394 | break; |
| 395 | case Opt_nobarrier: |
| 396 | set_opt(sbi, NOBARRIER); |
| 397 | break; |
| 398 | case Opt_fastboot: |
| 399 | set_opt(sbi, FASTBOOT); |
| 400 | break; |
| 401 | case Opt_extent_cache: |
| 402 | set_opt(sbi, EXTENT_CACHE); |
| 403 | break; |
| 404 | case Opt_noextent_cache: |
| 405 | clear_opt(sbi, EXTENT_CACHE); |
| 406 | break; |
| 407 | case Opt_noinline_data: |
| 408 | clear_opt(sbi, INLINE_DATA); |
| 409 | break; |
Chao Yu | 45c1c14 | 2015-12-16 13:12:16 +0800 | [diff] [blame^] | 410 | case Opt_data_flush: |
| 411 | set_opt(sbi, DATA_FLUSH); |
| 412 | break; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 413 | default: |
| 414 | f2fs_msg(sb, KERN_ERR, |
| 415 | "Unrecognized mount option \"%s\" or missing value", |
| 416 | p); |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | } |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
| 424 | { |
| 425 | struct f2fs_inode_info *fi; |
| 426 | |
| 427 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
| 428 | if (!fi) |
| 429 | return NULL; |
| 430 | |
| 431 | init_once((void *) fi); |
| 432 | |
| 433 | /* Initialize f2fs-specific inode info */ |
| 434 | fi->vfs_inode.i_version = 1; |
| 435 | atomic_set(&fi->dirty_pages, 0); |
| 436 | fi->i_current_depth = 1; |
| 437 | fi->i_advise = 0; |
| 438 | init_rwsem(&fi->i_sem); |
Chao Yu | bc2a214 | 2015-12-15 13:30:45 +0800 | [diff] [blame] | 439 | INIT_LIST_HEAD(&fi->dirty_list); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 440 | INIT_LIST_HEAD(&fi->inmem_pages); |
| 441 | mutex_init(&fi->inmem_lock); |
| 442 | |
| 443 | set_inode_flag(fi, FI_NEW_INODE); |
| 444 | |
| 445 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
| 446 | set_inode_flag(fi, FI_INLINE_XATTR); |
| 447 | |
| 448 | /* Will be used by directory only */ |
| 449 | fi->i_dir_level = F2FS_SB(sb)->dir_level; |
| 450 | |
| 451 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
| 452 | fi->i_crypt_info = NULL; |
| 453 | #endif |
| 454 | return &fi->vfs_inode; |
| 455 | } |
| 456 | |
| 457 | static int f2fs_drop_inode(struct inode *inode) |
| 458 | { |
| 459 | /* |
| 460 | * This is to avoid a deadlock condition like below. |
| 461 | * writeback_single_inode(inode) |
| 462 | * - f2fs_write_data_page |
| 463 | * - f2fs_gc -> iput -> evict |
| 464 | * - inode_wait_for_writeback(inode) |
| 465 | */ |
| 466 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
| 467 | if (!inode->i_nlink && !is_bad_inode(inode)) { |
| 468 | /* to avoid evict_inode call simultaneously */ |
| 469 | atomic_inc(&inode->i_count); |
| 470 | spin_unlock(&inode->i_lock); |
| 471 | |
| 472 | /* some remained atomic pages should discarded */ |
| 473 | if (f2fs_is_atomic_file(inode)) |
| 474 | commit_inmem_pages(inode, true); |
| 475 | |
| 476 | i_size_write(inode, 0); |
| 477 | |
| 478 | if (F2FS_HAS_BLOCKS(inode)) |
| 479 | f2fs_truncate(inode, true); |
| 480 | |
| 481 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
| 482 | if (F2FS_I(inode)->i_crypt_info) |
| 483 | f2fs_free_encryption_info(inode, |
| 484 | F2FS_I(inode)->i_crypt_info); |
| 485 | #endif |
| 486 | spin_lock(&inode->i_lock); |
| 487 | atomic_dec(&inode->i_count); |
| 488 | } |
| 489 | return 0; |
| 490 | } |
| 491 | return generic_drop_inode(inode); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * f2fs_dirty_inode() is called from __mark_inode_dirty() |
| 496 | * |
| 497 | * We should call set_dirty_inode to write the dirty inode through write_inode. |
| 498 | */ |
| 499 | static void f2fs_dirty_inode(struct inode *inode, int flags) |
| 500 | { |
| 501 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); |
| 502 | } |
| 503 | |
| 504 | static void f2fs_i_callback(struct rcu_head *head) |
| 505 | { |
| 506 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 507 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); |
| 508 | } |
| 509 | |
| 510 | static void f2fs_destroy_inode(struct inode *inode) |
| 511 | { |
| 512 | call_rcu(&inode->i_rcu, f2fs_i_callback); |
| 513 | } |
| 514 | |
| 515 | static void f2fs_put_super(struct super_block *sb) |
| 516 | { |
| 517 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 518 | |
| 519 | if (sbi->s_proc) { |
| 520 | remove_proc_entry("segment_info", sbi->s_proc); |
| 521 | remove_proc_entry(sb->s_id, f2fs_proc_root); |
| 522 | } |
| 523 | kobject_del(&sbi->s_kobj); |
| 524 | |
| 525 | stop_gc_thread(sbi); |
| 526 | |
| 527 | /* prevent remaining shrinker jobs */ |
| 528 | mutex_lock(&sbi->umount_mutex); |
| 529 | |
| 530 | /* |
| 531 | * We don't need to do checkpoint when superblock is clean. |
| 532 | * But, the previous checkpoint was not done by umount, it needs to do |
| 533 | * clean checkpoint again. |
| 534 | */ |
| 535 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
| 536 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
| 537 | struct cp_control cpc = { |
| 538 | .reason = CP_UMOUNT, |
| 539 | }; |
| 540 | write_checkpoint(sbi, &cpc); |
| 541 | } |
| 542 | |
| 543 | /* write_checkpoint can update stat informaion */ |
| 544 | f2fs_destroy_stats(sbi); |
| 545 | |
| 546 | /* |
| 547 | * normally superblock is clean, so we need to release this. |
| 548 | * In addition, EIO will skip do checkpoint, we need this as well. |
| 549 | */ |
Chao Yu | dbc32c2 | 2015-12-15 13:29:47 +0800 | [diff] [blame] | 550 | release_ino_entry(sbi); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 551 | release_discard_addrs(sbi); |
| 552 | |
| 553 | f2fs_leave_shrinker(sbi); |
| 554 | mutex_unlock(&sbi->umount_mutex); |
| 555 | |
| 556 | iput(sbi->node_inode); |
| 557 | iput(sbi->meta_inode); |
| 558 | |
| 559 | /* destroy f2fs internal modules */ |
| 560 | destroy_node_manager(sbi); |
| 561 | destroy_segment_manager(sbi); |
| 562 | |
| 563 | kfree(sbi->ckpt); |
| 564 | kobject_put(&sbi->s_kobj); |
| 565 | wait_for_completion(&sbi->s_kobj_unregister); |
| 566 | |
| 567 | sb->s_fs_info = NULL; |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 568 | kfree(sbi->raw_super); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 569 | kfree(sbi); |
| 570 | } |
| 571 | |
| 572 | int f2fs_sync_fs(struct super_block *sb, int sync) |
| 573 | { |
| 574 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 575 | |
| 576 | trace_f2fs_sync_fs(sb, sync); |
| 577 | |
| 578 | if (sync) { |
| 579 | struct cp_control cpc; |
| 580 | |
| 581 | cpc.reason = __get_cp_reason(sbi); |
| 582 | |
| 583 | mutex_lock(&sbi->gc_mutex); |
| 584 | write_checkpoint(sbi, &cpc); |
| 585 | mutex_unlock(&sbi->gc_mutex); |
| 586 | } else { |
| 587 | f2fs_balance_fs(sbi); |
| 588 | } |
| 589 | f2fs_trace_ios(NULL, 1); |
| 590 | |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static int f2fs_freeze(struct super_block *sb) |
| 595 | { |
| 596 | int err; |
| 597 | |
| 598 | if (f2fs_readonly(sb)) |
| 599 | return 0; |
| 600 | |
| 601 | err = f2fs_sync_fs(sb, 1); |
| 602 | return err; |
| 603 | } |
| 604 | |
| 605 | static int f2fs_unfreeze(struct super_block *sb) |
| 606 | { |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
| 611 | { |
| 612 | struct super_block *sb = dentry->d_sb; |
| 613 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 614 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
| 615 | block_t total_count, user_block_count, start_count, ovp_count; |
| 616 | |
| 617 | total_count = le64_to_cpu(sbi->raw_super->block_count); |
| 618 | user_block_count = sbi->user_block_count; |
| 619 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); |
| 620 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; |
| 621 | buf->f_type = F2FS_SUPER_MAGIC; |
| 622 | buf->f_bsize = sbi->blocksize; |
| 623 | |
| 624 | buf->f_blocks = total_count - start_count; |
| 625 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; |
| 626 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); |
| 627 | |
| 628 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
| 629 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); |
| 630 | |
| 631 | buf->f_namelen = F2FS_NAME_LEN; |
| 632 | buf->f_fsid.val[0] = (u32)id; |
| 633 | buf->f_fsid.val[1] = (u32)(id >> 32); |
| 634 | |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) |
| 639 | { |
| 640 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); |
| 641 | |
| 642 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) { |
| 643 | if (test_opt(sbi, FORCE_FG_GC)) |
| 644 | seq_printf(seq, ",background_gc=%s", "sync"); |
| 645 | else |
| 646 | seq_printf(seq, ",background_gc=%s", "on"); |
| 647 | } else { |
| 648 | seq_printf(seq, ",background_gc=%s", "off"); |
| 649 | } |
| 650 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
| 651 | seq_puts(seq, ",disable_roll_forward"); |
| 652 | if (test_opt(sbi, DISCARD)) |
| 653 | seq_puts(seq, ",discard"); |
| 654 | if (test_opt(sbi, NOHEAP)) |
| 655 | seq_puts(seq, ",no_heap_alloc"); |
| 656 | #ifdef CONFIG_F2FS_FS_XATTR |
| 657 | if (test_opt(sbi, XATTR_USER)) |
| 658 | seq_puts(seq, ",user_xattr"); |
| 659 | else |
| 660 | seq_puts(seq, ",nouser_xattr"); |
| 661 | if (test_opt(sbi, INLINE_XATTR)) |
| 662 | seq_puts(seq, ",inline_xattr"); |
| 663 | #endif |
| 664 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 665 | if (test_opt(sbi, POSIX_ACL)) |
| 666 | seq_puts(seq, ",acl"); |
| 667 | else |
| 668 | seq_puts(seq, ",noacl"); |
| 669 | #endif |
| 670 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) |
| 671 | seq_puts(seq, ",disable_ext_identify"); |
| 672 | if (test_opt(sbi, INLINE_DATA)) |
| 673 | seq_puts(seq, ",inline_data"); |
| 674 | else |
| 675 | seq_puts(seq, ",noinline_data"); |
| 676 | if (test_opt(sbi, INLINE_DENTRY)) |
| 677 | seq_puts(seq, ",inline_dentry"); |
| 678 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
| 679 | seq_puts(seq, ",flush_merge"); |
| 680 | if (test_opt(sbi, NOBARRIER)) |
| 681 | seq_puts(seq, ",nobarrier"); |
| 682 | if (test_opt(sbi, FASTBOOT)) |
| 683 | seq_puts(seq, ",fastboot"); |
| 684 | if (test_opt(sbi, EXTENT_CACHE)) |
| 685 | seq_puts(seq, ",extent_cache"); |
| 686 | else |
| 687 | seq_puts(seq, ",noextent_cache"); |
Chao Yu | 45c1c14 | 2015-12-16 13:12:16 +0800 | [diff] [blame^] | 688 | if (test_opt(sbi, DATA_FLUSH)) |
| 689 | seq_puts(seq, ",data_flush"); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 690 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
| 691 | |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
| 696 | { |
| 697 | struct super_block *sb = seq->private; |
| 698 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 699 | unsigned int total_segs = |
| 700 | le32_to_cpu(sbi->raw_super->segment_count_main); |
| 701 | int i; |
| 702 | |
| 703 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
| 704 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); |
| 705 | |
| 706 | for (i = 0; i < total_segs; i++) { |
| 707 | struct seg_entry *se = get_seg_entry(sbi, i); |
| 708 | |
| 709 | if ((i % 10) == 0) |
| 710 | seq_printf(seq, "%-10d", i); |
| 711 | seq_printf(seq, "%d|%-3u", se->type, |
| 712 | get_valid_blocks(sbi, i, 1)); |
| 713 | if ((i % 10) == 9 || i == (total_segs - 1)) |
| 714 | seq_putc(seq, '\n'); |
| 715 | else |
| 716 | seq_putc(seq, ' '); |
| 717 | } |
| 718 | |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | static int segment_info_open_fs(struct inode *inode, struct file *file) |
| 723 | { |
| 724 | return single_open(file, segment_info_seq_show, PDE(inode)->data); |
| 725 | } |
| 726 | |
| 727 | static const struct file_operations f2fs_seq_segment_info_fops = { |
| 728 | .owner = THIS_MODULE, |
| 729 | .open = segment_info_open_fs, |
| 730 | .read = seq_read, |
| 731 | .llseek = seq_lseek, |
| 732 | .release = single_release, |
| 733 | }; |
| 734 | |
| 735 | static void default_options(struct f2fs_sb_info *sbi) |
| 736 | { |
| 737 | /* init some FS parameters */ |
| 738 | sbi->active_logs = NR_CURSEG_TYPE; |
| 739 | |
| 740 | set_opt(sbi, BG_GC); |
| 741 | set_opt(sbi, INLINE_DATA); |
| 742 | set_opt(sbi, EXTENT_CACHE); |
| 743 | |
| 744 | #ifdef CONFIG_F2FS_FS_XATTR |
| 745 | set_opt(sbi, XATTR_USER); |
| 746 | #endif |
| 747 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 748 | set_opt(sbi, POSIX_ACL); |
| 749 | #endif |
| 750 | } |
| 751 | |
| 752 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
| 753 | { |
| 754 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 755 | struct f2fs_mount_info org_mount_opt; |
| 756 | int err, active_logs; |
| 757 | bool need_restart_gc = false; |
| 758 | bool need_stop_gc = false; |
| 759 | bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE); |
| 760 | |
| 761 | sync_filesystem(sb); |
| 762 | |
| 763 | /* |
| 764 | * Save the old mount options in case we |
| 765 | * need to restore them. |
| 766 | */ |
| 767 | org_mount_opt = sbi->mount_opt; |
| 768 | active_logs = sbi->active_logs; |
| 769 | |
| 770 | sbi->mount_opt.opt = 0; |
| 771 | default_options(sbi); |
| 772 | |
| 773 | /* parse mount options */ |
| 774 | err = parse_options(sb, data); |
| 775 | if (err) |
| 776 | goto restore_opts; |
| 777 | |
| 778 | /* |
| 779 | * Previous and new state of filesystem is RO, |
| 780 | * so skip checking GC and FLUSH_MERGE conditions. |
| 781 | */ |
| 782 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
| 783 | goto skip; |
| 784 | |
| 785 | /* disallow enable/disable extent_cache dynamically */ |
| 786 | if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) { |
| 787 | err = -EINVAL; |
| 788 | f2fs_msg(sbi->sb, KERN_WARNING, |
| 789 | "switch extent_cache option is not allowed"); |
| 790 | goto restore_opts; |
| 791 | } |
| 792 | |
| 793 | /* |
| 794 | * We stop the GC thread if FS is mounted as RO |
| 795 | * or if background_gc = off is passed in mount |
| 796 | * option. Also sync the filesystem. |
| 797 | */ |
| 798 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { |
| 799 | if (sbi->gc_thread) { |
| 800 | stop_gc_thread(sbi); |
| 801 | f2fs_sync_fs(sb, 1); |
| 802 | need_restart_gc = true; |
| 803 | } |
| 804 | } else if (!sbi->gc_thread) { |
| 805 | err = start_gc_thread(sbi); |
| 806 | if (err) |
| 807 | goto restore_opts; |
| 808 | need_stop_gc = true; |
| 809 | } |
| 810 | |
| 811 | /* |
| 812 | * We stop issue flush thread if FS is mounted as RO |
| 813 | * or if flush_merge is not passed in mount option. |
| 814 | */ |
| 815 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { |
| 816 | destroy_flush_cmd_control(sbi); |
| 817 | } else if (!SM_I(sbi)->cmd_control_info) { |
| 818 | err = create_flush_cmd_control(sbi); |
| 819 | if (err) |
| 820 | goto restore_gc; |
| 821 | } |
| 822 | skip: |
| 823 | /* Update the POSIXACL Flag */ |
| 824 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
| 825 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); |
| 826 | return 0; |
| 827 | restore_gc: |
| 828 | if (need_restart_gc) { |
| 829 | if (start_gc_thread(sbi)) |
| 830 | f2fs_msg(sbi->sb, KERN_WARNING, |
| 831 | "background gc thread has stopped"); |
| 832 | } else if (need_stop_gc) { |
| 833 | stop_gc_thread(sbi); |
| 834 | } |
| 835 | restore_opts: |
| 836 | sbi->mount_opt = org_mount_opt; |
| 837 | sbi->active_logs = active_logs; |
| 838 | return err; |
| 839 | } |
| 840 | |
| 841 | static struct super_operations f2fs_sops = { |
| 842 | .alloc_inode = f2fs_alloc_inode, |
| 843 | .drop_inode = f2fs_drop_inode, |
| 844 | .destroy_inode = f2fs_destroy_inode, |
| 845 | .write_inode = f2fs_write_inode, |
| 846 | .dirty_inode = f2fs_dirty_inode, |
| 847 | .show_options = f2fs_show_options, |
| 848 | .evict_inode = f2fs_evict_inode, |
| 849 | .put_super = f2fs_put_super, |
| 850 | .sync_fs = f2fs_sync_fs, |
| 851 | .freeze_fs = f2fs_freeze, |
| 852 | .unfreeze_fs = f2fs_unfreeze, |
| 853 | .statfs = f2fs_statfs, |
| 854 | .remount_fs = f2fs_remount, |
| 855 | }; |
| 856 | |
| 857 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, |
| 858 | u64 ino, u32 generation) |
| 859 | { |
| 860 | struct f2fs_sb_info *sbi = F2FS_SB(sb); |
| 861 | struct inode *inode; |
| 862 | |
| 863 | if (check_nid_range(sbi, ino)) |
| 864 | return ERR_PTR(-ESTALE); |
| 865 | |
| 866 | /* |
| 867 | * f2fs_iget isn't quite right if the inode is currently unallocated! |
| 868 | * However f2fs_iget currently does appropriate checks to handle stale |
| 869 | * inodes so everything is OK. |
| 870 | */ |
| 871 | inode = f2fs_iget(sb, ino); |
| 872 | if (IS_ERR(inode)) |
| 873 | return ERR_CAST(inode); |
| 874 | if (unlikely(generation && inode->i_generation != generation)) { |
| 875 | /* we didn't find the right inode.. */ |
| 876 | iput(inode); |
| 877 | return ERR_PTR(-ESTALE); |
| 878 | } |
| 879 | return inode; |
| 880 | } |
| 881 | |
| 882 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| 883 | int fh_len, int fh_type) |
| 884 | { |
| 885 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 886 | f2fs_nfs_get_inode); |
| 887 | } |
| 888 | |
| 889 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, |
| 890 | int fh_len, int fh_type) |
| 891 | { |
| 892 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 893 | f2fs_nfs_get_inode); |
| 894 | } |
| 895 | |
| 896 | static const struct export_operations f2fs_export_ops = { |
| 897 | .fh_to_dentry = f2fs_fh_to_dentry, |
| 898 | .fh_to_parent = f2fs_fh_to_parent, |
| 899 | .get_parent = f2fs_get_parent, |
| 900 | }; |
| 901 | |
| 902 | static loff_t max_file_size(unsigned bits) |
| 903 | { |
| 904 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
| 905 | loff_t leaf_count = ADDRS_PER_BLOCK; |
| 906 | |
| 907 | /* two direct node blocks */ |
| 908 | result += (leaf_count * 2); |
| 909 | |
| 910 | /* two indirect node blocks */ |
| 911 | leaf_count *= NIDS_PER_BLOCK; |
| 912 | result += (leaf_count * 2); |
| 913 | |
| 914 | /* one double indirect node block */ |
| 915 | leaf_count *= NIDS_PER_BLOCK; |
| 916 | result += leaf_count; |
| 917 | |
| 918 | result <<= bits; |
| 919 | return result; |
| 920 | } |
| 921 | |
Chao Yu | fc2c790 | 2015-12-15 09:58:18 +0800 | [diff] [blame] | 922 | static inline bool sanity_check_area_boundary(struct super_block *sb, |
| 923 | struct f2fs_super_block *raw_super) |
| 924 | { |
| 925 | u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); |
| 926 | u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr); |
| 927 | u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr); |
| 928 | u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr); |
| 929 | u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); |
| 930 | u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); |
| 931 | u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt); |
| 932 | u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit); |
| 933 | u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat); |
| 934 | u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa); |
| 935 | u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main); |
| 936 | u32 segment_count = le32_to_cpu(raw_super->segment_count); |
| 937 | u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); |
| 938 | |
| 939 | if (segment0_blkaddr != cp_blkaddr) { |
| 940 | f2fs_msg(sb, KERN_INFO, |
| 941 | "Mismatch start address, segment0(%u) cp_blkaddr(%u)", |
| 942 | segment0_blkaddr, cp_blkaddr); |
| 943 | return true; |
| 944 | } |
| 945 | |
| 946 | if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) != |
| 947 | sit_blkaddr) { |
| 948 | f2fs_msg(sb, KERN_INFO, |
| 949 | "Wrong CP boundary, start(%u) end(%u) blocks(%u)", |
| 950 | cp_blkaddr, sit_blkaddr, |
| 951 | segment_count_ckpt << log_blocks_per_seg); |
| 952 | return true; |
| 953 | } |
| 954 | |
| 955 | if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) != |
| 956 | nat_blkaddr) { |
| 957 | f2fs_msg(sb, KERN_INFO, |
| 958 | "Wrong SIT boundary, start(%u) end(%u) blocks(%u)", |
| 959 | sit_blkaddr, nat_blkaddr, |
| 960 | segment_count_sit << log_blocks_per_seg); |
| 961 | return true; |
| 962 | } |
| 963 | |
| 964 | if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) != |
| 965 | ssa_blkaddr) { |
| 966 | f2fs_msg(sb, KERN_INFO, |
| 967 | "Wrong NAT boundary, start(%u) end(%u) blocks(%u)", |
| 968 | nat_blkaddr, ssa_blkaddr, |
| 969 | segment_count_nat << log_blocks_per_seg); |
| 970 | return true; |
| 971 | } |
| 972 | |
| 973 | if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) != |
| 974 | main_blkaddr) { |
| 975 | f2fs_msg(sb, KERN_INFO, |
| 976 | "Wrong SSA boundary, start(%u) end(%u) blocks(%u)", |
| 977 | ssa_blkaddr, main_blkaddr, |
| 978 | segment_count_ssa << log_blocks_per_seg); |
| 979 | return true; |
| 980 | } |
| 981 | |
| 982 | if (main_blkaddr + (segment_count_main << log_blocks_per_seg) != |
| 983 | segment0_blkaddr + (segment_count << log_blocks_per_seg)) { |
| 984 | f2fs_msg(sb, KERN_INFO, |
| 985 | "Wrong MAIN_AREA boundary, start(%u) end(%u) blocks(%u)", |
| 986 | main_blkaddr, |
| 987 | segment0_blkaddr + (segment_count << log_blocks_per_seg), |
| 988 | segment_count_main << log_blocks_per_seg); |
| 989 | return true; |
| 990 | } |
| 991 | |
| 992 | return false; |
| 993 | } |
| 994 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 995 | static int sanity_check_raw_super(struct super_block *sb, |
| 996 | struct f2fs_super_block *raw_super) |
| 997 | { |
| 998 | unsigned int blocksize; |
| 999 | |
| 1000 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
| 1001 | f2fs_msg(sb, KERN_INFO, |
| 1002 | "Magic Mismatch, valid(0x%x) - read(0x%x)", |
| 1003 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); |
| 1004 | return 1; |
| 1005 | } |
| 1006 | |
| 1007 | /* Currently, support only 4KB page cache size */ |
| 1008 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { |
| 1009 | f2fs_msg(sb, KERN_INFO, |
| 1010 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
| 1011 | PAGE_CACHE_SIZE); |
| 1012 | return 1; |
| 1013 | } |
| 1014 | |
| 1015 | /* Currently, support only 4KB block size */ |
| 1016 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); |
| 1017 | if (blocksize != F2FS_BLKSIZE) { |
| 1018 | f2fs_msg(sb, KERN_INFO, |
| 1019 | "Invalid blocksize (%u), supports only 4KB\n", |
| 1020 | blocksize); |
| 1021 | return 1; |
| 1022 | } |
| 1023 | |
Chao Yu | fc2c790 | 2015-12-15 09:58:18 +0800 | [diff] [blame] | 1024 | /* check log blocks per segment */ |
| 1025 | if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) { |
| 1026 | f2fs_msg(sb, KERN_INFO, |
| 1027 | "Invalid log blocks per segment (%u)\n", |
| 1028 | le32_to_cpu(raw_super->log_blocks_per_seg)); |
| 1029 | return 1; |
| 1030 | } |
| 1031 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1032 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
| 1033 | if (le32_to_cpu(raw_super->log_sectorsize) > |
| 1034 | F2FS_MAX_LOG_SECTOR_SIZE || |
| 1035 | le32_to_cpu(raw_super->log_sectorsize) < |
| 1036 | F2FS_MIN_LOG_SECTOR_SIZE) { |
| 1037 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", |
| 1038 | le32_to_cpu(raw_super->log_sectorsize)); |
| 1039 | return 1; |
| 1040 | } |
| 1041 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
| 1042 | le32_to_cpu(raw_super->log_sectorsize) != |
| 1043 | F2FS_MAX_LOG_SECTOR_SIZE) { |
| 1044 | f2fs_msg(sb, KERN_INFO, |
| 1045 | "Invalid log sectors per block(%u) log sectorsize(%u)", |
| 1046 | le32_to_cpu(raw_super->log_sectors_per_block), |
| 1047 | le32_to_cpu(raw_super->log_sectorsize)); |
| 1048 | return 1; |
| 1049 | } |
Chao Yu | fc2c790 | 2015-12-15 09:58:18 +0800 | [diff] [blame] | 1050 | |
| 1051 | /* check reserved ino info */ |
| 1052 | if (le32_to_cpu(raw_super->node_ino) != 1 || |
| 1053 | le32_to_cpu(raw_super->meta_ino) != 2 || |
| 1054 | le32_to_cpu(raw_super->root_ino) != 3) { |
| 1055 | f2fs_msg(sb, KERN_INFO, |
| 1056 | "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)", |
| 1057 | le32_to_cpu(raw_super->node_ino), |
| 1058 | le32_to_cpu(raw_super->meta_ino), |
| 1059 | le32_to_cpu(raw_super->root_ino)); |
| 1060 | return 1; |
| 1061 | } |
| 1062 | |
| 1063 | /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */ |
| 1064 | if (sanity_check_area_boundary(sb, raw_super)) |
| 1065 | return 1; |
| 1066 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1067 | return 0; |
| 1068 | } |
| 1069 | |
| 1070 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
| 1071 | { |
| 1072 | unsigned int total, fsmeta; |
| 1073 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
| 1074 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); |
| 1075 | |
| 1076 | total = le32_to_cpu(raw_super->segment_count); |
| 1077 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); |
| 1078 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); |
| 1079 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); |
| 1080 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); |
| 1081 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); |
| 1082 | |
| 1083 | if (unlikely(fsmeta >= total)) |
| 1084 | return 1; |
| 1085 | |
| 1086 | if (unlikely(f2fs_cp_error(sbi))) { |
| 1087 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
| 1088 | return 1; |
| 1089 | } |
| 1090 | return 0; |
| 1091 | } |
| 1092 | |
| 1093 | static void init_sb_info(struct f2fs_sb_info *sbi) |
| 1094 | { |
| 1095 | struct f2fs_super_block *raw_super = sbi->raw_super; |
| 1096 | int i; |
| 1097 | |
| 1098 | sbi->log_sectors_per_block = |
| 1099 | le32_to_cpu(raw_super->log_sectors_per_block); |
| 1100 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); |
| 1101 | sbi->blocksize = 1 << sbi->log_blocksize; |
| 1102 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); |
| 1103 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; |
| 1104 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); |
| 1105 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); |
| 1106 | sbi->total_sections = le32_to_cpu(raw_super->section_count); |
| 1107 | sbi->total_node_count = |
| 1108 | (le32_to_cpu(raw_super->segment_count_nat) / 2) |
| 1109 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; |
| 1110 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); |
| 1111 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); |
| 1112 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); |
| 1113 | sbi->cur_victim_sec = NULL_SECNO; |
| 1114 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
| 1115 | |
| 1116 | for (i = 0; i < NR_COUNT_TYPE; i++) |
| 1117 | atomic_set(&sbi->nr_pages[i], 0); |
| 1118 | |
| 1119 | sbi->dir_level = DEF_DIR_LEVEL; |
| 1120 | sbi->cp_interval = DEF_CP_INTERVAL; |
| 1121 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
| 1122 | |
| 1123 | INIT_LIST_HEAD(&sbi->s_list); |
| 1124 | mutex_init(&sbi->umount_mutex); |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * Read f2fs raw super block. |
| 1129 | * Because we have two copies of super block, so read the first one at first, |
| 1130 | * if the first one is invalid, move to read the second one. |
| 1131 | */ |
| 1132 | static int read_raw_super_block(struct super_block *sb, |
| 1133 | struct f2fs_super_block **raw_super, |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1134 | int *valid_super_block, int *recovery) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1135 | { |
| 1136 | int block = 0; |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1137 | struct buffer_head *bh; |
| 1138 | struct f2fs_super_block *super, *buf; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1139 | int err = 0; |
| 1140 | |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1141 | super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL); |
| 1142 | if (!super) |
| 1143 | return -ENOMEM; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1144 | retry: |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1145 | bh = sb_bread(sb, block); |
| 1146 | if (!bh) { |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1147 | *recovery = 1; |
| 1148 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
| 1149 | block + 1); |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1150 | err = -EIO; |
| 1151 | goto next; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1152 | } |
| 1153 | |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1154 | buf = (struct f2fs_super_block *)(bh->b_data + F2FS_SUPER_OFFSET); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1155 | |
| 1156 | /* sanity checking of raw super */ |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1157 | if (sanity_check_raw_super(sb, buf)) { |
| 1158 | brelse(bh); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1159 | *recovery = 1; |
| 1160 | f2fs_msg(sb, KERN_ERR, |
| 1161 | "Can't find valid F2FS filesystem in %dth superblock", |
| 1162 | block + 1); |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1163 | err = -EINVAL; |
| 1164 | goto next; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1165 | } |
| 1166 | |
| 1167 | if (!*raw_super) { |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1168 | memcpy(super, buf, sizeof(*super)); |
| 1169 | *valid_super_block = block; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1170 | *raw_super = super; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1171 | } |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1172 | brelse(bh); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1173 | |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1174 | next: |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1175 | /* check the validity of the second superblock */ |
| 1176 | if (block == 0) { |
| 1177 | block++; |
| 1178 | goto retry; |
| 1179 | } |
| 1180 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1181 | /* No valid superblock */ |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1182 | if (!*raw_super) { |
| 1183 | kfree(super); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1184 | return err; |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1185 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1186 | |
| 1187 | return 0; |
| 1188 | } |
| 1189 | |
Chao Yu | 91d0dac | 2015-12-16 13:19:35 +0800 | [diff] [blame] | 1190 | int __f2fs_commit_super(struct f2fs_sb_info *sbi, int block) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1191 | { |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1192 | struct f2fs_super_block *super = F2FS_RAW_SUPER(sbi); |
Jaegeuk Kim | fd10c5c | 2015-12-07 10:16:58 -0800 | [diff] [blame] | 1193 | struct buffer_head *bh; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1194 | int err; |
| 1195 | |
Chao Yu | 91d0dac | 2015-12-16 13:19:35 +0800 | [diff] [blame] | 1196 | bh = sb_getblk(sbi->sb, block); |
Jaegeuk Kim | fd10c5c | 2015-12-07 10:16:58 -0800 | [diff] [blame] | 1197 | if (!bh) |
| 1198 | return -EIO; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1199 | |
Jaegeuk Kim | fd10c5c | 2015-12-07 10:16:58 -0800 | [diff] [blame] | 1200 | lock_buffer(bh); |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1201 | memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super)); |
Jaegeuk Kim | fd10c5c | 2015-12-07 10:16:58 -0800 | [diff] [blame] | 1202 | set_buffer_uptodate(bh); |
| 1203 | set_buffer_dirty(bh); |
| 1204 | unlock_buffer(bh); |
| 1205 | |
| 1206 | /* it's rare case, we can do fua all the time */ |
| 1207 | err = __sync_dirty_buffer(bh, WRITE_FLUSH_FUA); |
| 1208 | brelse(bh); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1209 | |
Chao Yu | 91d0dac | 2015-12-16 13:19:35 +0800 | [diff] [blame] | 1210 | return err; |
| 1211 | } |
| 1212 | |
| 1213 | int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) |
| 1214 | { |
| 1215 | int err; |
| 1216 | |
| 1217 | /* write back-up superblock first */ |
| 1218 | err = __f2fs_commit_super(sbi, sbi->valid_super_block ? 0 : 1); |
| 1219 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1220 | /* if we are in recovery path, skip writing valid superblock */ |
| 1221 | if (recover || err) |
Jaegeuk Kim | fd10c5c | 2015-12-07 10:16:58 -0800 | [diff] [blame] | 1222 | return err; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1223 | |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1224 | /* write current valid superblock */ |
Chao Yu | 91d0dac | 2015-12-16 13:19:35 +0800 | [diff] [blame] | 1225 | return __f2fs_commit_super(sbi, sbi->valid_super_block); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
| 1229 | { |
| 1230 | struct f2fs_sb_info *sbi; |
| 1231 | struct f2fs_super_block *raw_super; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1232 | struct inode *root; |
| 1233 | long err; |
| 1234 | bool retry = true, need_fsck = false; |
| 1235 | char *options = NULL; |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1236 | int recovery, i, valid_super_block; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1237 | |
| 1238 | try_onemore: |
| 1239 | err = -EINVAL; |
| 1240 | raw_super = NULL; |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1241 | valid_super_block = -1; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1242 | recovery = 0; |
| 1243 | |
| 1244 | /* allocate memory for f2fs-specific super block info */ |
| 1245 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); |
| 1246 | if (!sbi) |
| 1247 | return -ENOMEM; |
| 1248 | |
| 1249 | /* set a block size */ |
| 1250 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
| 1251 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
| 1252 | goto free_sbi; |
| 1253 | } |
| 1254 | |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1255 | err = read_raw_super_block(sb, &raw_super, &valid_super_block, |
| 1256 | &recovery); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1257 | if (err) |
| 1258 | goto free_sbi; |
| 1259 | |
| 1260 | sb->s_fs_info = sbi; |
| 1261 | default_options(sbi); |
| 1262 | /* parse mount options */ |
| 1263 | options = kstrdup((const char *)data, GFP_KERNEL); |
| 1264 | if (data && !options) { |
| 1265 | err = -ENOMEM; |
| 1266 | goto free_sb_buf; |
| 1267 | } |
| 1268 | |
| 1269 | err = parse_options(sb, options); |
| 1270 | if (err) |
| 1271 | goto free_options; |
| 1272 | |
| 1273 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
| 1274 | sb->s_max_links = F2FS_LINK_MAX; |
| 1275 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); |
| 1276 | |
| 1277 | sb->s_op = &f2fs_sops; |
| 1278 | sb->s_xattr = f2fs_xattr_handlers; |
| 1279 | sb->s_export_op = &f2fs_export_ops; |
| 1280 | sb->s_magic = F2FS_SUPER_MAGIC; |
| 1281 | sb->s_time_gran = 1; |
| 1282 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | |
| 1283 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); |
| 1284 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); |
| 1285 | |
| 1286 | /* init f2fs-specific super block info */ |
| 1287 | sbi->sb = sb; |
| 1288 | sbi->raw_super = raw_super; |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1289 | sbi->valid_super_block = valid_super_block; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1290 | mutex_init(&sbi->gc_mutex); |
| 1291 | mutex_init(&sbi->writepages); |
| 1292 | mutex_init(&sbi->cp_mutex); |
| 1293 | init_rwsem(&sbi->node_write); |
| 1294 | |
| 1295 | /* disallow all the data/node/meta page writes */ |
| 1296 | set_sbi_flag(sbi, SBI_POR_DOING); |
| 1297 | spin_lock_init(&sbi->stat_lock); |
| 1298 | |
| 1299 | init_rwsem(&sbi->read_io.io_rwsem); |
| 1300 | sbi->read_io.sbi = sbi; |
| 1301 | sbi->read_io.bio = NULL; |
| 1302 | for (i = 0; i < NR_PAGE_TYPE; i++) { |
| 1303 | init_rwsem(&sbi->write_io[i].io_rwsem); |
| 1304 | sbi->write_io[i].sbi = sbi; |
| 1305 | sbi->write_io[i].bio = NULL; |
| 1306 | } |
| 1307 | |
| 1308 | init_rwsem(&sbi->cp_rwsem); |
| 1309 | init_waitqueue_head(&sbi->cp_wait); |
| 1310 | init_sb_info(sbi); |
| 1311 | |
| 1312 | /* get an inode for meta space */ |
| 1313 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); |
| 1314 | if (IS_ERR(sbi->meta_inode)) { |
| 1315 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
| 1316 | err = PTR_ERR(sbi->meta_inode); |
| 1317 | goto free_options; |
| 1318 | } |
| 1319 | |
| 1320 | err = get_valid_checkpoint(sbi); |
| 1321 | if (err) { |
| 1322 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); |
| 1323 | goto free_meta_inode; |
| 1324 | } |
| 1325 | |
| 1326 | /* sanity checking of checkpoint */ |
| 1327 | err = -EINVAL; |
| 1328 | if (sanity_check_ckpt(sbi)) { |
| 1329 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
| 1330 | goto free_cp; |
| 1331 | } |
| 1332 | |
| 1333 | sbi->total_valid_node_count = |
| 1334 | le32_to_cpu(sbi->ckpt->valid_node_count); |
| 1335 | sbi->total_valid_inode_count = |
| 1336 | le32_to_cpu(sbi->ckpt->valid_inode_count); |
| 1337 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); |
| 1338 | sbi->total_valid_block_count = |
| 1339 | le64_to_cpu(sbi->ckpt->valid_block_count); |
| 1340 | sbi->last_valid_block_count = sbi->total_valid_block_count; |
| 1341 | sbi->alloc_valid_block_count = 0; |
Chao Yu | fb1825c | 2015-12-16 13:09:20 +0800 | [diff] [blame] | 1342 | for (i = 0; i < NR_INODE_TYPE; i++) { |
| 1343 | INIT_LIST_HEAD(&sbi->inode_list[i]); |
| 1344 | spin_lock_init(&sbi->inode_lock[i]); |
| 1345 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1346 | |
| 1347 | init_extent_cache_info(sbi); |
| 1348 | |
| 1349 | init_ino_entry_info(sbi); |
| 1350 | |
| 1351 | /* setup f2fs internal modules */ |
| 1352 | err = build_segment_manager(sbi); |
| 1353 | if (err) { |
| 1354 | f2fs_msg(sb, KERN_ERR, |
| 1355 | "Failed to initialize F2FS segment manager"); |
| 1356 | goto free_sm; |
| 1357 | } |
| 1358 | err = build_node_manager(sbi); |
| 1359 | if (err) { |
| 1360 | f2fs_msg(sb, KERN_ERR, |
| 1361 | "Failed to initialize F2FS node manager"); |
| 1362 | goto free_nm; |
| 1363 | } |
| 1364 | |
| 1365 | build_gc_manager(sbi); |
| 1366 | |
| 1367 | /* get an inode for node space */ |
| 1368 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); |
| 1369 | if (IS_ERR(sbi->node_inode)) { |
| 1370 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
| 1371 | err = PTR_ERR(sbi->node_inode); |
| 1372 | goto free_nm; |
| 1373 | } |
| 1374 | |
| 1375 | f2fs_join_shrinker(sbi); |
| 1376 | |
| 1377 | /* if there are nt orphan nodes free them */ |
| 1378 | err = recover_orphan_inodes(sbi); |
| 1379 | if (err) |
| 1380 | goto free_node_inode; |
| 1381 | |
| 1382 | /* read root inode and dentry */ |
| 1383 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); |
| 1384 | if (IS_ERR(root)) { |
| 1385 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
| 1386 | err = PTR_ERR(root); |
| 1387 | goto free_node_inode; |
| 1388 | } |
| 1389 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
| 1390 | iput(root); |
| 1391 | err = -EINVAL; |
| 1392 | goto free_node_inode; |
| 1393 | } |
| 1394 | |
| 1395 | sb->s_root = d_make_root(root); /* allocate root dentry */ |
| 1396 | if (!sb->s_root) { |
| 1397 | err = -ENOMEM; |
| 1398 | goto free_root_inode; |
| 1399 | } |
| 1400 | |
| 1401 | err = f2fs_build_stats(sbi); |
| 1402 | if (err) |
| 1403 | goto free_root_inode; |
| 1404 | |
| 1405 | if (f2fs_proc_root) |
| 1406 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); |
| 1407 | |
| 1408 | if (sbi->s_proc) |
| 1409 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, |
| 1410 | &f2fs_seq_segment_info_fops, sb); |
| 1411 | |
| 1412 | sbi->s_kobj.kset = f2fs_kset; |
| 1413 | init_completion(&sbi->s_kobj_unregister); |
| 1414 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, |
| 1415 | "%s", sb->s_id); |
| 1416 | if (err) |
| 1417 | goto free_proc; |
| 1418 | |
| 1419 | /* recover fsynced data */ |
| 1420 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
| 1421 | /* |
| 1422 | * mount should be failed, when device has readonly mode, and |
| 1423 | * previous checkpoint was not done by clean system shutdown. |
| 1424 | */ |
| 1425 | if (bdev_read_only(sb->s_bdev) && |
| 1426 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { |
| 1427 | err = -EROFS; |
| 1428 | goto free_kobj; |
| 1429 | } |
| 1430 | |
| 1431 | if (need_fsck) |
| 1432 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
| 1433 | |
| 1434 | err = recover_fsync_data(sbi); |
| 1435 | if (err) { |
| 1436 | need_fsck = true; |
| 1437 | f2fs_msg(sb, KERN_ERR, |
| 1438 | "Cannot recover all fsync data errno=%ld", err); |
| 1439 | goto free_kobj; |
| 1440 | } |
| 1441 | } |
| 1442 | /* recover_fsync_data() cleared this already */ |
| 1443 | clear_sbi_flag(sbi, SBI_POR_DOING); |
| 1444 | |
| 1445 | /* |
| 1446 | * If filesystem is not mounted as read-only then |
| 1447 | * do start the gc_thread. |
| 1448 | */ |
| 1449 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
| 1450 | /* After POR, we can run background GC thread.*/ |
| 1451 | err = start_gc_thread(sbi); |
| 1452 | if (err) |
| 1453 | goto free_kobj; |
| 1454 | } |
| 1455 | kfree(options); |
| 1456 | |
| 1457 | /* recover broken superblock */ |
| 1458 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { |
| 1459 | f2fs_msg(sb, KERN_INFO, "Recover invalid superblock"); |
| 1460 | f2fs_commit_super(sbi, true); |
| 1461 | } |
| 1462 | |
| 1463 | sbi->cp_expires = round_jiffies_up(jiffies); |
| 1464 | |
| 1465 | return 0; |
| 1466 | |
| 1467 | free_kobj: |
| 1468 | kobject_del(&sbi->s_kobj); |
Chao Yu | 98fbe36 | 2015-11-16 20:38:25 +0800 | [diff] [blame] | 1469 | kobject_put(&sbi->s_kobj); |
| 1470 | wait_for_completion(&sbi->s_kobj_unregister); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1471 | free_proc: |
| 1472 | if (sbi->s_proc) { |
| 1473 | remove_proc_entry("segment_info", sbi->s_proc); |
| 1474 | remove_proc_entry(sb->s_id, f2fs_proc_root); |
| 1475 | } |
| 1476 | f2fs_destroy_stats(sbi); |
| 1477 | free_root_inode: |
| 1478 | dput(sb->s_root); |
| 1479 | sb->s_root = NULL; |
| 1480 | free_node_inode: |
| 1481 | mutex_lock(&sbi->umount_mutex); |
| 1482 | f2fs_leave_shrinker(sbi); |
| 1483 | iput(sbi->node_inode); |
| 1484 | mutex_unlock(&sbi->umount_mutex); |
| 1485 | free_nm: |
| 1486 | destroy_node_manager(sbi); |
| 1487 | free_sm: |
| 1488 | destroy_segment_manager(sbi); |
| 1489 | free_cp: |
| 1490 | kfree(sbi->ckpt); |
| 1491 | free_meta_inode: |
| 1492 | make_bad_inode(sbi->meta_inode); |
| 1493 | iput(sbi->meta_inode); |
| 1494 | free_options: |
| 1495 | kfree(options); |
| 1496 | free_sb_buf: |
Yunlei He | 33e7927 | 2015-12-15 17:17:20 +0800 | [diff] [blame] | 1497 | kfree(raw_super); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1498 | free_sbi: |
| 1499 | kfree(sbi); |
| 1500 | |
| 1501 | /* give only one another chance */ |
| 1502 | if (retry) { |
| 1503 | retry = false; |
| 1504 | shrink_dcache_sb(sb); |
| 1505 | goto try_onemore; |
| 1506 | } |
| 1507 | return err; |
| 1508 | } |
| 1509 | |
| 1510 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, |
| 1511 | const char *dev_name, void *data) |
| 1512 | { |
| 1513 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); |
| 1514 | } |
| 1515 | |
| 1516 | static void kill_f2fs_super(struct super_block *sb) |
| 1517 | { |
| 1518 | if (sb->s_root) |
| 1519 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
| 1520 | kill_block_super(sb); |
| 1521 | } |
| 1522 | |
| 1523 | static struct file_system_type f2fs_fs_type = { |
| 1524 | .owner = THIS_MODULE, |
| 1525 | .name = "f2fs", |
| 1526 | .mount = f2fs_mount, |
| 1527 | .kill_sb = kill_f2fs_super, |
| 1528 | .fs_flags = FS_REQUIRES_DEV, |
| 1529 | }; |
| 1530 | |
| 1531 | static int __init init_inodecache(void) |
| 1532 | { |
| 1533 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", |
| 1534 | sizeof(struct f2fs_inode_info)); |
| 1535 | if (!f2fs_inode_cachep) |
| 1536 | return -ENOMEM; |
| 1537 | return 0; |
| 1538 | } |
| 1539 | |
| 1540 | static void destroy_inodecache(void) |
| 1541 | { |
| 1542 | /* |
| 1543 | * Make sure all delayed rcu free inodes are flushed before we |
| 1544 | * destroy cache. |
| 1545 | */ |
| 1546 | rcu_barrier(); |
| 1547 | kmem_cache_destroy(f2fs_inode_cachep); |
| 1548 | } |
| 1549 | |
| 1550 | static int __init init_f2fs_fs(void) |
| 1551 | { |
| 1552 | int err; |
| 1553 | |
| 1554 | f2fs_build_trace_ios(); |
| 1555 | |
| 1556 | err = init_inodecache(); |
| 1557 | if (err) |
| 1558 | goto fail; |
| 1559 | err = create_node_manager_caches(); |
| 1560 | if (err) |
| 1561 | goto free_inodecache; |
| 1562 | err = create_segment_manager_caches(); |
| 1563 | if (err) |
| 1564 | goto free_node_manager_caches; |
| 1565 | err = create_checkpoint_caches(); |
| 1566 | if (err) |
| 1567 | goto free_segment_manager_caches; |
| 1568 | err = create_extent_cache(); |
| 1569 | if (err) |
| 1570 | goto free_checkpoint_caches; |
| 1571 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
| 1572 | if (!f2fs_kset) { |
| 1573 | err = -ENOMEM; |
| 1574 | goto free_extent_cache; |
| 1575 | } |
| 1576 | err = f2fs_init_crypto(); |
| 1577 | if (err) |
| 1578 | goto free_kset; |
| 1579 | |
| 1580 | register_shrinker(&f2fs_shrinker_info); |
| 1581 | |
| 1582 | err = register_filesystem(&f2fs_fs_type); |
| 1583 | if (err) |
| 1584 | goto free_shrinker; |
Chao Yu | 3e36b0b | 2015-10-29 09:13:04 +0800 | [diff] [blame] | 1585 | err = f2fs_create_root_stats(); |
| 1586 | if (err) |
| 1587 | goto free_filesystem; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1588 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
| 1589 | return 0; |
| 1590 | |
Chao Yu | 3e36b0b | 2015-10-29 09:13:04 +0800 | [diff] [blame] | 1591 | free_filesystem: |
| 1592 | unregister_filesystem(&f2fs_fs_type); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1593 | free_shrinker: |
| 1594 | unregister_shrinker(&f2fs_shrinker_info); |
| 1595 | f2fs_exit_crypto(); |
| 1596 | free_kset: |
| 1597 | kset_unregister(f2fs_kset); |
| 1598 | free_extent_cache: |
| 1599 | destroy_extent_cache(); |
| 1600 | free_checkpoint_caches: |
| 1601 | destroy_checkpoint_caches(); |
| 1602 | free_segment_manager_caches: |
| 1603 | destroy_segment_manager_caches(); |
| 1604 | free_node_manager_caches: |
| 1605 | destroy_node_manager_caches(); |
| 1606 | free_inodecache: |
| 1607 | destroy_inodecache(); |
| 1608 | fail: |
| 1609 | return err; |
| 1610 | } |
| 1611 | |
| 1612 | static void __exit exit_f2fs_fs(void) |
| 1613 | { |
| 1614 | remove_proc_entry("fs/f2fs", NULL); |
| 1615 | f2fs_destroy_root_stats(); |
| 1616 | unregister_shrinker(&f2fs_shrinker_info); |
| 1617 | unregister_filesystem(&f2fs_fs_type); |
| 1618 | f2fs_exit_crypto(); |
| 1619 | destroy_extent_cache(); |
| 1620 | destroy_checkpoint_caches(); |
| 1621 | destroy_segment_manager_caches(); |
| 1622 | destroy_node_manager_caches(); |
| 1623 | destroy_inodecache(); |
| 1624 | kset_unregister(f2fs_kset); |
| 1625 | f2fs_destroy_trace_ios(); |
| 1626 | } |
| 1627 | |
| 1628 | module_init(init_f2fs_fs) |
| 1629 | module_exit(exit_f2fs_fs) |
| 1630 | |
| 1631 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); |
| 1632 | MODULE_DESCRIPTION("Flash Friendly File System"); |
| 1633 | MODULE_LICENSE("GPL"); |