1 /* 2 * fs/f2fs/f2fs.h 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 #ifndef _LINUX_F2FS_H 12 #define _LINUX_F2FS_H 13 14 #include <linux/types.h> 15 #include <linux/page-flags.h> 16 #include <linux/buffer_head.h> 17 #include <linux/slab.h> 18 #include <linux/crc32.h> 19 #include <linux/magic.h> 20 #include <linux/kobject.h> 21 #include <linux/sched.h> 22 23 #ifdef CONFIG_F2FS_CHECK_FS 24 #define f2fs_bug_on(condition) BUG_ON(condition) 25 #else 26 #define f2fs_bug_on(condition) 27 #endif 28 29 /* 30 * For mount options 31 */ 32 #define F2FS_MOUNT_BG_GC 0x00000001 33 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 34 #define F2FS_MOUNT_DISCARD 0x00000004 35 #define F2FS_MOUNT_NOHEAP 0x00000008 36 #define F2FS_MOUNT_XATTR_USER 0x00000010 37 #define F2FS_MOUNT_POSIX_ACL 0x00000020 38 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 39 #define F2FS_MOUNT_INLINE_XATTR 0x00000080 40 41 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 42 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 43 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 44 45 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 46 typecheck(unsigned long long, b) && \ 47 ((long long)((a) - (b)) > 0)) 48 49 typedef u32 block_t; /* 50 * should not change u32, since it is the on-disk block 51 * address format, __le32. 52 */ 53 typedef u32 nid_t; 54 55 struct f2fs_mount_info { 56 unsigned int opt; 57 }; 58 59 #define CRCPOLY_LE 0xedb88320 60 61 static inline __u32 f2fs_crc32(void *buf, size_t len) 62 { 63 unsigned char *p = (unsigned char *)buf; 64 __u32 crc = F2FS_SUPER_MAGIC; 65 int i; 66 67 while (len--) { 68 crc ^= *p++; 69 for (i = 0; i < 8; i++) 70 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); 71 } 72 return crc; 73 } 74 75 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size) 76 { 77 return f2fs_crc32(buf, buf_size) == blk_crc; 78 } 79 80 /* 81 * For checkpoint manager 82 */ 83 enum { 84 NAT_BITMAP, 85 SIT_BITMAP 86 }; 87 88 /* for the list of orphan inodes */ 89 struct orphan_inode_entry { 90 struct list_head list; /* list head */ 91 nid_t ino; /* inode number */ 92 }; 93 94 /* for the list of directory inodes */ 95 struct dir_inode_entry { 96 struct list_head list; /* list head */ 97 struct inode *inode; /* vfs inode pointer */ 98 }; 99 100 /* for the list of fsync inodes, used only during recovery */ 101 struct fsync_inode_entry { 102 struct list_head list; /* list head */ 103 struct inode *inode; /* vfs inode pointer */ 104 block_t blkaddr; /* block address locating the last inode */ 105 }; 106 107 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 108 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 109 110 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 111 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 112 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 113 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 114 115 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 116 { 117 int before = nats_in_cursum(rs); 118 rs->n_nats = cpu_to_le16(before + i); 119 return before; 120 } 121 122 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 123 { 124 int before = sits_in_cursum(rs); 125 rs->n_sits = cpu_to_le16(before + i); 126 return before; 127 } 128 129 /* 130 * ioctl commands 131 */ 132 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 133 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 134 135 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 136 /* 137 * ioctl commands in 32 bit emulation 138 */ 139 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 140 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 141 #endif 142 143 /* 144 * For INODE and NODE manager 145 */ 146 /* 147 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 148 * as its node offset to distinguish from index node blocks. 149 * But some bits are used to mark the node block. 150 */ 151 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 152 >> OFFSET_BIT_SHIFT) 153 enum { 154 ALLOC_NODE, /* allocate a new node page if needed */ 155 LOOKUP_NODE, /* look up a node without readahead */ 156 LOOKUP_NODE_RA, /* 157 * look up a node with readahead called 158 * by get_datablock_ro. 159 */ 160 }; 161 162 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 163 164 /* for in-memory extent cache entry */ 165 struct extent_info { 166 rwlock_t ext_lock; /* rwlock for consistency */ 167 unsigned int fofs; /* start offset in a file */ 168 u32 blk_addr; /* start block address of the extent */ 169 unsigned int len; /* length of the extent */ 170 }; 171 172 /* 173 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 174 */ 175 #define FADVISE_COLD_BIT 0x01 176 #define FADVISE_LOST_PINO_BIT 0x02 177 178 struct f2fs_inode_info { 179 struct inode vfs_inode; /* serve a vfs inode */ 180 unsigned long i_flags; /* keep an inode flags for ioctl */ 181 unsigned char i_advise; /* use to give file attribute hints */ 182 unsigned int i_current_depth; /* use only in directory structure */ 183 unsigned int i_pino; /* parent inode number */ 184 umode_t i_acl_mode; /* keep file acl mode temporarily */ 185 186 /* Use below internally in f2fs*/ 187 unsigned long flags; /* use to pass per-file flags */ 188 atomic_t dirty_dents; /* # of dirty dentry pages */ 189 f2fs_hash_t chash; /* hash value of given file name */ 190 unsigned int clevel; /* maximum level of given file name */ 191 nid_t i_xattr_nid; /* node id that contains xattrs */ 192 unsigned long long xattr_ver; /* cp version of xattr modification */ 193 struct extent_info ext; /* in-memory extent cache entry */ 194 }; 195 196 static inline void get_extent_info(struct extent_info *ext, 197 struct f2fs_extent i_ext) 198 { 199 write_lock(&ext->ext_lock); 200 ext->fofs = le32_to_cpu(i_ext.fofs); 201 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 202 ext->len = le32_to_cpu(i_ext.len); 203 write_unlock(&ext->ext_lock); 204 } 205 206 static inline void set_raw_extent(struct extent_info *ext, 207 struct f2fs_extent *i_ext) 208 { 209 read_lock(&ext->ext_lock); 210 i_ext->fofs = cpu_to_le32(ext->fofs); 211 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 212 i_ext->len = cpu_to_le32(ext->len); 213 read_unlock(&ext->ext_lock); 214 } 215 216 struct f2fs_nm_info { 217 block_t nat_blkaddr; /* base disk address of NAT */ 218 nid_t max_nid; /* maximum possible node ids */ 219 nid_t next_scan_nid; /* the next nid to be scanned */ 220 221 /* NAT cache management */ 222 struct radix_tree_root nat_root;/* root of the nat entry cache */ 223 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 224 unsigned int nat_cnt; /* the # of cached nat entries */ 225 struct list_head nat_entries; /* cached nat entry list (clean) */ 226 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 227 228 /* free node ids management */ 229 struct list_head free_nid_list; /* a list for free nids */ 230 spinlock_t free_nid_list_lock; /* protect free nid list */ 231 unsigned int fcnt; /* the number of free node id */ 232 struct mutex build_lock; /* lock for build free nids */ 233 234 /* for checkpoint */ 235 char *nat_bitmap; /* NAT bitmap pointer */ 236 int bitmap_size; /* bitmap size */ 237 }; 238 239 /* 240 * this structure is used as one of function parameters. 241 * all the information are dedicated to a given direct node block determined 242 * by the data offset in a file. 243 */ 244 struct dnode_of_data { 245 struct inode *inode; /* vfs inode pointer */ 246 struct page *inode_page; /* its inode page, NULL is possible */ 247 struct page *node_page; /* cached direct node page */ 248 nid_t nid; /* node id of the direct node block */ 249 unsigned int ofs_in_node; /* data offset in the node page */ 250 bool inode_page_locked; /* inode page is locked or not */ 251 block_t data_blkaddr; /* block address of the node block */ 252 }; 253 254 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 255 struct page *ipage, struct page *npage, nid_t nid) 256 { 257 memset(dn, 0, sizeof(*dn)); 258 dn->inode = inode; 259 dn->inode_page = ipage; 260 dn->node_page = npage; 261 dn->nid = nid; 262 } 263 264 /* 265 * For SIT manager 266 * 267 * By default, there are 6 active log areas across the whole main area. 268 * When considering hot and cold data separation to reduce cleaning overhead, 269 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 270 * respectively. 271 * In the current design, you should not change the numbers intentionally. 272 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 273 * logs individually according to the underlying devices. (default: 6) 274 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 275 * data and 8 for node logs. 276 */ 277 #define NR_CURSEG_DATA_TYPE (3) 278 #define NR_CURSEG_NODE_TYPE (3) 279 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 280 281 enum { 282 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 283 CURSEG_WARM_DATA, /* data blocks */ 284 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 285 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 286 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 287 CURSEG_COLD_NODE, /* indirect node blocks */ 288 NO_CHECK_TYPE 289 }; 290 291 struct f2fs_sm_info { 292 struct sit_info *sit_info; /* whole segment information */ 293 struct free_segmap_info *free_info; /* free segment information */ 294 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 295 struct curseg_info *curseg_array; /* active segment information */ 296 297 struct list_head wblist_head; /* list of under-writeback pages */ 298 spinlock_t wblist_lock; /* lock for checkpoint */ 299 300 block_t seg0_blkaddr; /* block address of 0'th segment */ 301 block_t main_blkaddr; /* start block address of main area */ 302 block_t ssa_blkaddr; /* start block address of SSA area */ 303 304 unsigned int segment_count; /* total # of segments */ 305 unsigned int main_segments; /* # of segments in main area */ 306 unsigned int reserved_segments; /* # of reserved segments */ 307 unsigned int ovp_segments; /* # of overprovision segments */ 308 309 /* a threshold to reclaim prefree segments */ 310 unsigned int rec_prefree_segments; 311 }; 312 313 /* 314 * For superblock 315 */ 316 /* 317 * COUNT_TYPE for monitoring 318 * 319 * f2fs monitors the number of several block types such as on-writeback, 320 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 321 */ 322 enum count_type { 323 F2FS_WRITEBACK, 324 F2FS_DIRTY_DENTS, 325 F2FS_DIRTY_NODES, 326 F2FS_DIRTY_META, 327 NR_COUNT_TYPE, 328 }; 329 330 /* 331 * The below are the page types of bios used in submti_bio(). 332 * The available types are: 333 * DATA User data pages. It operates as async mode. 334 * NODE Node pages. It operates as async mode. 335 * META FS metadata pages such as SIT, NAT, CP. 336 * NR_PAGE_TYPE The number of page types. 337 * META_FLUSH Make sure the previous pages are written 338 * with waiting the bio's completion 339 * ... Only can be used with META. 340 */ 341 enum page_type { 342 DATA, 343 NODE, 344 META, 345 NR_PAGE_TYPE, 346 META_FLUSH, 347 }; 348 349 struct f2fs_sb_info { 350 struct super_block *sb; /* pointer to VFS super block */ 351 struct proc_dir_entry *s_proc; /* proc entry */ 352 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 353 struct f2fs_super_block *raw_super; /* raw super block pointer */ 354 int s_dirty; /* dirty flag for checkpoint */ 355 356 /* for node-related operations */ 357 struct f2fs_nm_info *nm_info; /* node manager */ 358 struct inode *node_inode; /* cache node blocks */ 359 360 /* for segment-related operations */ 361 struct f2fs_sm_info *sm_info; /* segment manager */ 362 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */ 363 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */ 364 struct rw_semaphore bio_sem; /* IO semaphore */ 365 366 /* for checkpoint */ 367 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 368 struct inode *meta_inode; /* cache meta blocks */ 369 struct mutex cp_mutex; /* checkpoint procedure lock */ 370 struct rw_semaphore cp_rwsem; /* blocking FS operations */ 371 struct mutex node_write; /* locking node writes */ 372 struct mutex writepages; /* mutex for writepages() */ 373 bool por_doing; /* recovery is doing or not */ 374 bool on_build_free_nids; /* build_free_nids is doing */ 375 wait_queue_head_t cp_wait; 376 377 /* for orphan inode management */ 378 struct list_head orphan_inode_list; /* orphan inode list */ 379 struct mutex orphan_inode_mutex; /* for orphan inode list */ 380 unsigned int n_orphans; /* # of orphan inodes */ 381 382 /* for directory inode management */ 383 struct list_head dir_inode_list; /* dir inode list */ 384 spinlock_t dir_inode_lock; /* for dir inode list lock */ 385 386 /* basic file system units */ 387 unsigned int log_sectors_per_block; /* log2 sectors per block */ 388 unsigned int log_blocksize; /* log2 block size */ 389 unsigned int blocksize; /* block size */ 390 unsigned int root_ino_num; /* root inode number*/ 391 unsigned int node_ino_num; /* node inode number*/ 392 unsigned int meta_ino_num; /* meta inode number*/ 393 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 394 unsigned int blocks_per_seg; /* blocks per segment */ 395 unsigned int segs_per_sec; /* segments per section */ 396 unsigned int secs_per_zone; /* sections per zone */ 397 unsigned int total_sections; /* total section count */ 398 unsigned int total_node_count; /* total node block count */ 399 unsigned int total_valid_node_count; /* valid node block count */ 400 unsigned int total_valid_inode_count; /* valid inode count */ 401 int active_logs; /* # of active logs */ 402 403 block_t user_block_count; /* # of user blocks */ 404 block_t total_valid_block_count; /* # of valid blocks */ 405 block_t alloc_valid_block_count; /* # of allocated blocks */ 406 block_t last_valid_block_count; /* for recovery */ 407 u32 s_next_generation; /* for NFS support */ 408 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 409 410 struct f2fs_mount_info mount_opt; /* mount options */ 411 412 /* for cleaning operations */ 413 struct mutex gc_mutex; /* mutex for GC */ 414 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 415 unsigned int cur_victim_sec; /* current victim section num */ 416 417 /* 418 * for stat information. 419 * one is for the LFS mode, and the other is for the SSR mode. 420 */ 421 #ifdef CONFIG_F2FS_STAT_FS 422 struct f2fs_stat_info *stat_info; /* FS status information */ 423 unsigned int segment_count[2]; /* # of allocated segments */ 424 unsigned int block_count[2]; /* # of allocated blocks */ 425 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 426 int bg_gc; /* background gc calls */ 427 unsigned int n_dirty_dirs; /* # of dir inodes */ 428 #endif 429 unsigned int last_victim[2]; /* last victim segment # */ 430 spinlock_t stat_lock; /* lock for stat operations */ 431 432 /* For sysfs suppport */ 433 struct kobject s_kobj; 434 struct completion s_kobj_unregister; 435 }; 436 437 /* 438 * Inline functions 439 */ 440 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 441 { 442 return container_of(inode, struct f2fs_inode_info, vfs_inode); 443 } 444 445 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 446 { 447 return sb->s_fs_info; 448 } 449 450 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 451 { 452 return (struct f2fs_super_block *)(sbi->raw_super); 453 } 454 455 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 456 { 457 return (struct f2fs_checkpoint *)(sbi->ckpt); 458 } 459 460 static inline struct f2fs_node *F2FS_NODE(struct page *page) 461 { 462 return (struct f2fs_node *)page_address(page); 463 } 464 465 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 466 { 467 return (struct f2fs_nm_info *)(sbi->nm_info); 468 } 469 470 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 471 { 472 return (struct f2fs_sm_info *)(sbi->sm_info); 473 } 474 475 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 476 { 477 return (struct sit_info *)(SM_I(sbi)->sit_info); 478 } 479 480 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 481 { 482 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 483 } 484 485 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 486 { 487 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 488 } 489 490 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 491 { 492 sbi->s_dirty = 1; 493 } 494 495 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 496 { 497 sbi->s_dirty = 0; 498 } 499 500 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 501 { 502 return le64_to_cpu(cp->checkpoint_ver); 503 } 504 505 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 506 { 507 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 508 return ckpt_flags & f; 509 } 510 511 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 512 { 513 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 514 ckpt_flags |= f; 515 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 516 } 517 518 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 519 { 520 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 521 ckpt_flags &= (~f); 522 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 523 } 524 525 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 526 { 527 down_read(&sbi->cp_rwsem); 528 } 529 530 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) 531 { 532 up_read(&sbi->cp_rwsem); 533 } 534 535 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) 536 { 537 down_write_nest_lock(&sbi->cp_rwsem, &sbi->cp_mutex); 538 } 539 540 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 541 { 542 up_write(&sbi->cp_rwsem); 543 } 544 545 /* 546 * Check whether the given nid is within node id range. 547 */ 548 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 549 { 550 WARN_ON((nid >= NM_I(sbi)->max_nid)); 551 if (nid >= NM_I(sbi)->max_nid) 552 return -EINVAL; 553 return 0; 554 } 555 556 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 557 558 /* 559 * Check whether the inode has blocks or not 560 */ 561 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 562 { 563 if (F2FS_I(inode)->i_xattr_nid) 564 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1); 565 else 566 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS); 567 } 568 569 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 570 struct inode *inode, blkcnt_t count) 571 { 572 block_t valid_block_count; 573 574 spin_lock(&sbi->stat_lock); 575 valid_block_count = 576 sbi->total_valid_block_count + (block_t)count; 577 if (valid_block_count > sbi->user_block_count) { 578 spin_unlock(&sbi->stat_lock); 579 return false; 580 } 581 inode->i_blocks += count; 582 sbi->total_valid_block_count = valid_block_count; 583 sbi->alloc_valid_block_count += (block_t)count; 584 spin_unlock(&sbi->stat_lock); 585 return true; 586 } 587 588 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi, 589 struct inode *inode, 590 blkcnt_t count) 591 { 592 spin_lock(&sbi->stat_lock); 593 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count); 594 f2fs_bug_on(inode->i_blocks < count); 595 inode->i_blocks -= count; 596 sbi->total_valid_block_count -= (block_t)count; 597 spin_unlock(&sbi->stat_lock); 598 return 0; 599 } 600 601 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 602 { 603 atomic_inc(&sbi->nr_pages[count_type]); 604 F2FS_SET_SB_DIRT(sbi); 605 } 606 607 static inline void inode_inc_dirty_dents(struct inode *inode) 608 { 609 atomic_inc(&F2FS_I(inode)->dirty_dents); 610 } 611 612 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 613 { 614 atomic_dec(&sbi->nr_pages[count_type]); 615 } 616 617 static inline void inode_dec_dirty_dents(struct inode *inode) 618 { 619 atomic_dec(&F2FS_I(inode)->dirty_dents); 620 } 621 622 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 623 { 624 return atomic_read(&sbi->nr_pages[count_type]); 625 } 626 627 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 628 { 629 unsigned int pages_per_sec = sbi->segs_per_sec * 630 (1 << sbi->log_blocks_per_seg); 631 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 632 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 633 } 634 635 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 636 { 637 block_t ret; 638 spin_lock(&sbi->stat_lock); 639 ret = sbi->total_valid_block_count; 640 spin_unlock(&sbi->stat_lock); 641 return ret; 642 } 643 644 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 645 { 646 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 647 648 /* return NAT or SIT bitmap */ 649 if (flag == NAT_BITMAP) 650 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 651 else if (flag == SIT_BITMAP) 652 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 653 654 return 0; 655 } 656 657 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 658 { 659 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 660 int offset = (flag == NAT_BITMAP) ? 661 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 662 return &ckpt->sit_nat_version_bitmap + offset; 663 } 664 665 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 666 { 667 block_t start_addr; 668 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 669 unsigned long long ckpt_version = cur_cp_version(ckpt); 670 671 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 672 673 /* 674 * odd numbered checkpoint should at cp segment 0 675 * and even segent must be at cp segment 1 676 */ 677 if (!(ckpt_version & 1)) 678 start_addr += sbi->blocks_per_seg; 679 680 return start_addr; 681 } 682 683 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 684 { 685 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 686 } 687 688 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 689 struct inode *inode, 690 unsigned int count) 691 { 692 block_t valid_block_count; 693 unsigned int valid_node_count; 694 695 spin_lock(&sbi->stat_lock); 696 697 valid_block_count = sbi->total_valid_block_count + (block_t)count; 698 sbi->alloc_valid_block_count += (block_t)count; 699 valid_node_count = sbi->total_valid_node_count + count; 700 701 if (valid_block_count > sbi->user_block_count) { 702 spin_unlock(&sbi->stat_lock); 703 return false; 704 } 705 706 if (valid_node_count > sbi->total_node_count) { 707 spin_unlock(&sbi->stat_lock); 708 return false; 709 } 710 711 if (inode) 712 inode->i_blocks += count; 713 sbi->total_valid_node_count = valid_node_count; 714 sbi->total_valid_block_count = valid_block_count; 715 spin_unlock(&sbi->stat_lock); 716 717 return true; 718 } 719 720 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 721 struct inode *inode, 722 unsigned int count) 723 { 724 spin_lock(&sbi->stat_lock); 725 726 f2fs_bug_on(sbi->total_valid_block_count < count); 727 f2fs_bug_on(sbi->total_valid_node_count < count); 728 f2fs_bug_on(inode->i_blocks < count); 729 730 inode->i_blocks -= count; 731 sbi->total_valid_node_count -= count; 732 sbi->total_valid_block_count -= (block_t)count; 733 734 spin_unlock(&sbi->stat_lock); 735 } 736 737 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 738 { 739 unsigned int ret; 740 spin_lock(&sbi->stat_lock); 741 ret = sbi->total_valid_node_count; 742 spin_unlock(&sbi->stat_lock); 743 return ret; 744 } 745 746 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 747 { 748 spin_lock(&sbi->stat_lock); 749 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count); 750 sbi->total_valid_inode_count++; 751 spin_unlock(&sbi->stat_lock); 752 } 753 754 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi) 755 { 756 spin_lock(&sbi->stat_lock); 757 f2fs_bug_on(!sbi->total_valid_inode_count); 758 sbi->total_valid_inode_count--; 759 spin_unlock(&sbi->stat_lock); 760 return 0; 761 } 762 763 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 764 { 765 unsigned int ret; 766 spin_lock(&sbi->stat_lock); 767 ret = sbi->total_valid_inode_count; 768 spin_unlock(&sbi->stat_lock); 769 return ret; 770 } 771 772 static inline void f2fs_put_page(struct page *page, int unlock) 773 { 774 if (!page || IS_ERR(page)) 775 return; 776 777 if (unlock) { 778 f2fs_bug_on(!PageLocked(page)); 779 unlock_page(page); 780 } 781 page_cache_release(page); 782 } 783 784 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 785 { 786 if (dn->node_page) 787 f2fs_put_page(dn->node_page, 1); 788 if (dn->inode_page && dn->node_page != dn->inode_page) 789 f2fs_put_page(dn->inode_page, 0); 790 dn->node_page = NULL; 791 dn->inode_page = NULL; 792 } 793 794 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 795 size_t size, void (*ctor)(void *)) 796 { 797 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); 798 } 799 800 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 801 gfp_t flags) 802 { 803 void *entry; 804 retry: 805 entry = kmem_cache_alloc(cachep, flags); 806 if (!entry) { 807 cond_resched(); 808 goto retry; 809 } 810 811 return entry; 812 } 813 814 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 815 816 static inline bool IS_INODE(struct page *page) 817 { 818 struct f2fs_node *p = F2FS_NODE(page); 819 return RAW_IS_INODE(p); 820 } 821 822 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 823 { 824 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 825 } 826 827 static inline block_t datablock_addr(struct page *node_page, 828 unsigned int offset) 829 { 830 struct f2fs_node *raw_node; 831 __le32 *addr_array; 832 raw_node = F2FS_NODE(node_page); 833 addr_array = blkaddr_in_node(raw_node); 834 return le32_to_cpu(addr_array[offset]); 835 } 836 837 static inline int f2fs_test_bit(unsigned int nr, char *addr) 838 { 839 int mask; 840 841 addr += (nr >> 3); 842 mask = 1 << (7 - (nr & 0x07)); 843 return mask & *addr; 844 } 845 846 static inline int f2fs_set_bit(unsigned int nr, char *addr) 847 { 848 int mask; 849 int ret; 850 851 addr += (nr >> 3); 852 mask = 1 << (7 - (nr & 0x07)); 853 ret = mask & *addr; 854 *addr |= mask; 855 return ret; 856 } 857 858 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 859 { 860 int mask; 861 int ret; 862 863 addr += (nr >> 3); 864 mask = 1 << (7 - (nr & 0x07)); 865 ret = mask & *addr; 866 *addr &= ~mask; 867 return ret; 868 } 869 870 /* used for f2fs_inode_info->flags */ 871 enum { 872 FI_NEW_INODE, /* indicate newly allocated inode */ 873 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 874 FI_INC_LINK, /* need to increment i_nlink */ 875 FI_ACL_MODE, /* indicate acl mode */ 876 FI_NO_ALLOC, /* should not allocate any blocks */ 877 FI_UPDATE_DIR, /* should update inode block for consistency */ 878 FI_DELAY_IPUT, /* used for the recovery */ 879 FI_INLINE_XATTR, /* used for inline xattr */ 880 }; 881 882 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 883 { 884 set_bit(flag, &fi->flags); 885 } 886 887 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 888 { 889 return test_bit(flag, &fi->flags); 890 } 891 892 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 893 { 894 clear_bit(flag, &fi->flags); 895 } 896 897 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 898 { 899 fi->i_acl_mode = mode; 900 set_inode_flag(fi, FI_ACL_MODE); 901 } 902 903 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 904 { 905 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 906 clear_inode_flag(fi, FI_ACL_MODE); 907 return 1; 908 } 909 return 0; 910 } 911 912 static inline void get_inline_info(struct f2fs_inode_info *fi, 913 struct f2fs_inode *ri) 914 { 915 if (ri->i_inline & F2FS_INLINE_XATTR) 916 set_inode_flag(fi, FI_INLINE_XATTR); 917 } 918 919 static inline void set_raw_inline(struct f2fs_inode_info *fi, 920 struct f2fs_inode *ri) 921 { 922 ri->i_inline = 0; 923 924 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 925 ri->i_inline |= F2FS_INLINE_XATTR; 926 } 927 928 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 929 { 930 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 931 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 932 return DEF_ADDRS_PER_INODE; 933 } 934 935 static inline void *inline_xattr_addr(struct page *page) 936 { 937 struct f2fs_inode *ri; 938 ri = (struct f2fs_inode *)page_address(page); 939 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - 940 F2FS_INLINE_XATTR_ADDRS]); 941 } 942 943 static inline int inline_xattr_size(struct inode *inode) 944 { 945 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR)) 946 return F2FS_INLINE_XATTR_ADDRS << 2; 947 else 948 return 0; 949 } 950 951 static inline int f2fs_readonly(struct super_block *sb) 952 { 953 return sb->s_flags & MS_RDONLY; 954 } 955 956 /* 957 * file.c 958 */ 959 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 960 void truncate_data_blocks(struct dnode_of_data *); 961 void f2fs_truncate(struct inode *); 962 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 963 int f2fs_setattr(struct dentry *, struct iattr *); 964 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 965 int truncate_data_blocks_range(struct dnode_of_data *, int); 966 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 967 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 968 969 /* 970 * inode.c 971 */ 972 void f2fs_set_inode_flags(struct inode *); 973 struct inode *f2fs_iget(struct super_block *, unsigned long); 974 int try_to_free_nats(struct f2fs_sb_info *, int); 975 void update_inode(struct inode *, struct page *); 976 int update_inode_page(struct inode *); 977 int f2fs_write_inode(struct inode *, struct writeback_control *); 978 void f2fs_evict_inode(struct inode *); 979 980 /* 981 * namei.c 982 */ 983 struct dentry *f2fs_get_parent(struct dentry *child); 984 985 /* 986 * dir.c 987 */ 988 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 989 struct page **); 990 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 991 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 992 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 993 struct page *, struct inode *); 994 int update_dent_inode(struct inode *, const struct qstr *); 995 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 996 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 997 int f2fs_make_empty(struct inode *, struct inode *); 998 bool f2fs_empty_dir(struct inode *); 999 1000 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1001 { 1002 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1003 inode); 1004 } 1005 1006 /* 1007 * super.c 1008 */ 1009 int f2fs_sync_fs(struct super_block *, int); 1010 extern __printf(3, 4) 1011 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1012 1013 /* 1014 * hash.c 1015 */ 1016 f2fs_hash_t f2fs_dentry_hash(const char *, size_t); 1017 1018 /* 1019 * node.c 1020 */ 1021 struct dnode_of_data; 1022 struct node_info; 1023 1024 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1025 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1026 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1027 int truncate_inode_blocks(struct inode *, pgoff_t); 1028 int truncate_xattr_node(struct inode *, struct page *); 1029 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t); 1030 int remove_inode_page(struct inode *); 1031 struct page *new_inode_page(struct inode *, const struct qstr *); 1032 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1033 void ra_node_page(struct f2fs_sb_info *, nid_t); 1034 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1035 struct page *get_node_page_ra(struct page *, int); 1036 void sync_inode_page(struct dnode_of_data *); 1037 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1038 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1039 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1040 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1041 void recover_node_page(struct f2fs_sb_info *, struct page *, 1042 struct f2fs_summary *, struct node_info *, block_t); 1043 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1044 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1045 struct f2fs_summary_block *); 1046 void flush_nat_entries(struct f2fs_sb_info *); 1047 int build_node_manager(struct f2fs_sb_info *); 1048 void destroy_node_manager(struct f2fs_sb_info *); 1049 int __init create_node_manager_caches(void); 1050 void destroy_node_manager_caches(void); 1051 1052 /* 1053 * segment.c 1054 */ 1055 void f2fs_balance_fs(struct f2fs_sb_info *); 1056 void f2fs_balance_fs_bg(struct f2fs_sb_info *); 1057 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1058 void clear_prefree_segments(struct f2fs_sb_info *); 1059 int npages_for_summary_flush(struct f2fs_sb_info *); 1060 void allocate_new_segments(struct f2fs_sb_info *); 1061 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1062 struct bio *f2fs_bio_alloc(struct block_device *, int); 1063 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool); 1064 void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool); 1065 void write_meta_page(struct f2fs_sb_info *, struct page *); 1066 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, 1067 block_t, block_t *); 1068 void write_data_page(struct inode *, struct page *, struct dnode_of_data*, 1069 block_t, block_t *); 1070 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t); 1071 void recover_data_page(struct f2fs_sb_info *, struct page *, 1072 struct f2fs_summary *, block_t, block_t); 1073 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 1074 struct f2fs_summary *, block_t, block_t); 1075 void write_data_summaries(struct f2fs_sb_info *, block_t); 1076 void write_node_summaries(struct f2fs_sb_info *, block_t); 1077 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1078 int, unsigned int, int); 1079 void flush_sit_entries(struct f2fs_sb_info *); 1080 int build_segment_manager(struct f2fs_sb_info *); 1081 void destroy_segment_manager(struct f2fs_sb_info *); 1082 1083 /* 1084 * checkpoint.c 1085 */ 1086 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1087 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1088 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1089 int acquire_orphan_inode(struct f2fs_sb_info *); 1090 void release_orphan_inode(struct f2fs_sb_info *); 1091 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1092 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1093 int recover_orphan_inodes(struct f2fs_sb_info *); 1094 int get_valid_checkpoint(struct f2fs_sb_info *); 1095 void set_dirty_dir_page(struct inode *, struct page *); 1096 void add_dirty_dir_inode(struct inode *); 1097 void remove_dirty_dir_inode(struct inode *); 1098 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t); 1099 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1100 void write_checkpoint(struct f2fs_sb_info *, bool); 1101 void init_orphan_info(struct f2fs_sb_info *); 1102 int __init create_checkpoint_caches(void); 1103 void destroy_checkpoint_caches(void); 1104 1105 /* 1106 * data.c 1107 */ 1108 int reserve_new_block(struct dnode_of_data *); 1109 void update_extent_cache(block_t, struct dnode_of_data *); 1110 struct page *find_data_page(struct inode *, pgoff_t, bool); 1111 struct page *get_lock_data_page(struct inode *, pgoff_t); 1112 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1113 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int); 1114 int do_write_data_page(struct page *); 1115 1116 /* 1117 * gc.c 1118 */ 1119 int start_gc_thread(struct f2fs_sb_info *); 1120 void stop_gc_thread(struct f2fs_sb_info *); 1121 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1122 int f2fs_gc(struct f2fs_sb_info *); 1123 void build_gc_manager(struct f2fs_sb_info *); 1124 int __init create_gc_caches(void); 1125 void destroy_gc_caches(void); 1126 1127 /* 1128 * recovery.c 1129 */ 1130 int recover_fsync_data(struct f2fs_sb_info *); 1131 bool space_for_roll_forward(struct f2fs_sb_info *); 1132 1133 /* 1134 * debug.c 1135 */ 1136 #ifdef CONFIG_F2FS_STAT_FS 1137 struct f2fs_stat_info { 1138 struct list_head stat_list; 1139 struct f2fs_sb_info *sbi; 1140 struct mutex stat_lock; 1141 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1142 int main_area_segs, main_area_sections, main_area_zones; 1143 int hit_ext, total_ext; 1144 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1145 int nats, sits, fnids; 1146 int total_count, utilization; 1147 int bg_gc; 1148 unsigned int valid_count, valid_node_count, valid_inode_count; 1149 unsigned int bimodal, avg_vblocks; 1150 int util_free, util_valid, util_invalid; 1151 int rsvd_segs, overp_segs; 1152 int dirty_count, node_pages, meta_pages; 1153 int prefree_count, call_count; 1154 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1155 int tot_blks, data_blks, node_blks; 1156 int curseg[NR_CURSEG_TYPE]; 1157 int cursec[NR_CURSEG_TYPE]; 1158 int curzone[NR_CURSEG_TYPE]; 1159 1160 unsigned int segment_count[2]; 1161 unsigned int block_count[2]; 1162 unsigned base_mem, cache_mem; 1163 }; 1164 1165 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1166 { 1167 return (struct f2fs_stat_info*)sbi->stat_info; 1168 } 1169 1170 #define stat_inc_call_count(si) ((si)->call_count++) 1171 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) 1172 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) 1173 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) 1174 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) 1175 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) 1176 #define stat_inc_seg_type(sbi, curseg) \ 1177 ((sbi)->segment_count[(curseg)->alloc_type]++) 1178 #define stat_inc_block_count(sbi, curseg) \ 1179 ((sbi)->block_count[(curseg)->alloc_type]++) 1180 1181 #define stat_inc_seg_count(sbi, type) \ 1182 do { \ 1183 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1184 (si)->tot_segs++; \ 1185 if (type == SUM_TYPE_DATA) \ 1186 si->data_segs++; \ 1187 else \ 1188 si->node_segs++; \ 1189 } while (0) 1190 1191 #define stat_inc_tot_blk_count(si, blks) \ 1192 (si->tot_blks += (blks)) 1193 1194 #define stat_inc_data_blk_count(sbi, blks) \ 1195 do { \ 1196 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1197 stat_inc_tot_blk_count(si, blks); \ 1198 si->data_blks += (blks); \ 1199 } while (0) 1200 1201 #define stat_inc_node_blk_count(sbi, blks) \ 1202 do { \ 1203 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1204 stat_inc_tot_blk_count(si, blks); \ 1205 si->node_blks += (blks); \ 1206 } while (0) 1207 1208 int f2fs_build_stats(struct f2fs_sb_info *); 1209 void f2fs_destroy_stats(struct f2fs_sb_info *); 1210 void __init f2fs_create_root_stats(void); 1211 void f2fs_destroy_root_stats(void); 1212 #else 1213 #define stat_inc_call_count(si) 1214 #define stat_inc_bggc_count(si) 1215 #define stat_inc_dirty_dir(sbi) 1216 #define stat_dec_dirty_dir(sbi) 1217 #define stat_inc_total_hit(sb) 1218 #define stat_inc_read_hit(sb) 1219 #define stat_inc_seg_type(sbi, curseg) 1220 #define stat_inc_block_count(sbi, curseg) 1221 #define stat_inc_seg_count(si, type) 1222 #define stat_inc_tot_blk_count(si, blks) 1223 #define stat_inc_data_blk_count(si, blks) 1224 #define stat_inc_node_blk_count(sbi, blks) 1225 1226 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1227 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1228 static inline void __init f2fs_create_root_stats(void) { } 1229 static inline void f2fs_destroy_root_stats(void) { } 1230 #endif 1231 1232 extern const struct file_operations f2fs_dir_operations; 1233 extern const struct file_operations f2fs_file_operations; 1234 extern const struct inode_operations f2fs_file_inode_operations; 1235 extern const struct address_space_operations f2fs_dblock_aops; 1236 extern const struct address_space_operations f2fs_node_aops; 1237 extern const struct address_space_operations f2fs_meta_aops; 1238 extern const struct inode_operations f2fs_dir_inode_operations; 1239 extern const struct inode_operations f2fs_symlink_inode_operations; 1240 extern const struct inode_operations f2fs_special_inode_operations; 1241 #endif 1242