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 #define f2fs_down_write(x, y) down_write_nest_lock(x, y) 26 #else 27 #define f2fs_bug_on(condition) 28 #define f2fs_down_write(x, y) down_write(x) 29 #endif 30 31 /* 32 * For mount options 33 */ 34 #define F2FS_MOUNT_BG_GC 0x00000001 35 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 36 #define F2FS_MOUNT_DISCARD 0x00000004 37 #define F2FS_MOUNT_NOHEAP 0x00000008 38 #define F2FS_MOUNT_XATTR_USER 0x00000010 39 #define F2FS_MOUNT_POSIX_ACL 0x00000020 40 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 41 #define F2FS_MOUNT_INLINE_XATTR 0x00000080 42 #define F2FS_MOUNT_INLINE_DATA 0x00000100 43 44 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 45 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 46 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 47 48 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 49 typecheck(unsigned long long, b) && \ 50 ((long long)((a) - (b)) > 0)) 51 52 typedef u32 block_t; /* 53 * should not change u32, since it is the on-disk block 54 * address format, __le32. 55 */ 56 typedef u32 nid_t; 57 58 struct f2fs_mount_info { 59 unsigned int opt; 60 }; 61 62 #define CRCPOLY_LE 0xedb88320 63 64 static inline __u32 f2fs_crc32(void *buf, size_t len) 65 { 66 unsigned char *p = (unsigned char *)buf; 67 __u32 crc = F2FS_SUPER_MAGIC; 68 int i; 69 70 while (len--) { 71 crc ^= *p++; 72 for (i = 0; i < 8; i++) 73 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); 74 } 75 return crc; 76 } 77 78 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size) 79 { 80 return f2fs_crc32(buf, buf_size) == blk_crc; 81 } 82 83 /* 84 * For checkpoint manager 85 */ 86 enum { 87 NAT_BITMAP, 88 SIT_BITMAP 89 }; 90 91 /* 92 * For CP/NAT/SIT/SSA readahead 93 */ 94 enum { 95 META_CP, 96 META_NAT, 97 META_SIT, 98 META_SSA 99 }; 100 101 /* for the list of orphan inodes */ 102 struct orphan_inode_entry { 103 struct list_head list; /* list head */ 104 nid_t ino; /* inode number */ 105 }; 106 107 /* for the list of directory inodes */ 108 struct dir_inode_entry { 109 struct list_head list; /* list head */ 110 struct inode *inode; /* vfs inode pointer */ 111 }; 112 113 /* for the list of blockaddresses to be discarded */ 114 struct discard_entry { 115 struct list_head list; /* list head */ 116 block_t blkaddr; /* block address to be discarded */ 117 int len; /* # of consecutive blocks of the discard */ 118 }; 119 120 /* for the list of fsync inodes, used only during recovery */ 121 struct fsync_inode_entry { 122 struct list_head list; /* list head */ 123 struct inode *inode; /* vfs inode pointer */ 124 block_t blkaddr; /* block address locating the last inode */ 125 }; 126 127 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 128 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 129 130 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 131 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 132 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 133 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 134 135 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 136 { 137 int before = nats_in_cursum(rs); 138 rs->n_nats = cpu_to_le16(before + i); 139 return before; 140 } 141 142 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 143 { 144 int before = sits_in_cursum(rs); 145 rs->n_sits = cpu_to_le16(before + i); 146 return before; 147 } 148 149 /* 150 * ioctl commands 151 */ 152 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 153 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 154 155 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 156 /* 157 * ioctl commands in 32 bit emulation 158 */ 159 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 160 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 161 #endif 162 163 /* 164 * For INODE and NODE manager 165 */ 166 /* 167 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 168 * as its node offset to distinguish from index node blocks. 169 * But some bits are used to mark the node block. 170 */ 171 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 172 >> OFFSET_BIT_SHIFT) 173 enum { 174 ALLOC_NODE, /* allocate a new node page if needed */ 175 LOOKUP_NODE, /* look up a node without readahead */ 176 LOOKUP_NODE_RA, /* 177 * look up a node with readahead called 178 * by get_data_block. 179 */ 180 }; 181 182 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 183 184 /* for in-memory extent cache entry */ 185 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */ 186 187 struct extent_info { 188 rwlock_t ext_lock; /* rwlock for consistency */ 189 unsigned int fofs; /* start offset in a file */ 190 u32 blk_addr; /* start block address of the extent */ 191 unsigned int len; /* length of the extent */ 192 }; 193 194 /* 195 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 196 */ 197 #define FADVISE_COLD_BIT 0x01 198 #define FADVISE_LOST_PINO_BIT 0x02 199 200 #define DEF_DIR_LEVEL 0 201 202 struct f2fs_inode_info { 203 struct inode vfs_inode; /* serve a vfs inode */ 204 unsigned long i_flags; /* keep an inode flags for ioctl */ 205 unsigned char i_advise; /* use to give file attribute hints */ 206 unsigned char i_dir_level; /* use for dentry level for large dir */ 207 unsigned int i_current_depth; /* use only in directory structure */ 208 unsigned int i_pino; /* parent inode number */ 209 umode_t i_acl_mode; /* keep file acl mode temporarily */ 210 211 /* Use below internally in f2fs*/ 212 unsigned long flags; /* use to pass per-file flags */ 213 atomic_t dirty_dents; /* # of dirty dentry pages */ 214 f2fs_hash_t chash; /* hash value of given file name */ 215 unsigned int clevel; /* maximum level of given file name */ 216 nid_t i_xattr_nid; /* node id that contains xattrs */ 217 unsigned long long xattr_ver; /* cp version of xattr modification */ 218 struct extent_info ext; /* in-memory extent cache entry */ 219 }; 220 221 static inline void get_extent_info(struct extent_info *ext, 222 struct f2fs_extent i_ext) 223 { 224 write_lock(&ext->ext_lock); 225 ext->fofs = le32_to_cpu(i_ext.fofs); 226 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 227 ext->len = le32_to_cpu(i_ext.len); 228 write_unlock(&ext->ext_lock); 229 } 230 231 static inline void set_raw_extent(struct extent_info *ext, 232 struct f2fs_extent *i_ext) 233 { 234 read_lock(&ext->ext_lock); 235 i_ext->fofs = cpu_to_le32(ext->fofs); 236 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 237 i_ext->len = cpu_to_le32(ext->len); 238 read_unlock(&ext->ext_lock); 239 } 240 241 struct f2fs_nm_info { 242 block_t nat_blkaddr; /* base disk address of NAT */ 243 nid_t max_nid; /* maximum possible node ids */ 244 nid_t next_scan_nid; /* the next nid to be scanned */ 245 246 /* NAT cache management */ 247 struct radix_tree_root nat_root;/* root of the nat entry cache */ 248 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 249 unsigned int nat_cnt; /* the # of cached nat entries */ 250 struct list_head nat_entries; /* cached nat entry list (clean) */ 251 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 252 253 /* free node ids management */ 254 struct radix_tree_root free_nid_root;/* root of the free_nid cache */ 255 struct list_head free_nid_list; /* a list for free nids */ 256 spinlock_t free_nid_list_lock; /* protect free nid list */ 257 unsigned int fcnt; /* the number of free node id */ 258 struct mutex build_lock; /* lock for build free nids */ 259 260 /* for checkpoint */ 261 char *nat_bitmap; /* NAT bitmap pointer */ 262 int bitmap_size; /* bitmap size */ 263 }; 264 265 /* 266 * this structure is used as one of function parameters. 267 * all the information are dedicated to a given direct node block determined 268 * by the data offset in a file. 269 */ 270 struct dnode_of_data { 271 struct inode *inode; /* vfs inode pointer */ 272 struct page *inode_page; /* its inode page, NULL is possible */ 273 struct page *node_page; /* cached direct node page */ 274 nid_t nid; /* node id of the direct node block */ 275 unsigned int ofs_in_node; /* data offset in the node page */ 276 bool inode_page_locked; /* inode page is locked or not */ 277 block_t data_blkaddr; /* block address of the node block */ 278 }; 279 280 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 281 struct page *ipage, struct page *npage, nid_t nid) 282 { 283 memset(dn, 0, sizeof(*dn)); 284 dn->inode = inode; 285 dn->inode_page = ipage; 286 dn->node_page = npage; 287 dn->nid = nid; 288 } 289 290 /* 291 * For SIT manager 292 * 293 * By default, there are 6 active log areas across the whole main area. 294 * When considering hot and cold data separation to reduce cleaning overhead, 295 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 296 * respectively. 297 * In the current design, you should not change the numbers intentionally. 298 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 299 * logs individually according to the underlying devices. (default: 6) 300 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 301 * data and 8 for node logs. 302 */ 303 #define NR_CURSEG_DATA_TYPE (3) 304 #define NR_CURSEG_NODE_TYPE (3) 305 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 306 307 enum { 308 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 309 CURSEG_WARM_DATA, /* data blocks */ 310 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 311 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 312 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 313 CURSEG_COLD_NODE, /* indirect node blocks */ 314 NO_CHECK_TYPE 315 }; 316 317 struct f2fs_sm_info { 318 struct sit_info *sit_info; /* whole segment information */ 319 struct free_segmap_info *free_info; /* free segment information */ 320 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 321 struct curseg_info *curseg_array; /* active segment information */ 322 323 struct list_head wblist_head; /* list of under-writeback pages */ 324 spinlock_t wblist_lock; /* lock for checkpoint */ 325 326 block_t seg0_blkaddr; /* block address of 0'th segment */ 327 block_t main_blkaddr; /* start block address of main area */ 328 block_t ssa_blkaddr; /* start block address of SSA area */ 329 330 unsigned int segment_count; /* total # of segments */ 331 unsigned int main_segments; /* # of segments in main area */ 332 unsigned int reserved_segments; /* # of reserved segments */ 333 unsigned int ovp_segments; /* # of overprovision segments */ 334 335 /* a threshold to reclaim prefree segments */ 336 unsigned int rec_prefree_segments; 337 338 /* for small discard management */ 339 struct list_head discard_list; /* 4KB discard list */ 340 int nr_discards; /* # of discards in the list */ 341 int max_discards; /* max. discards to be issued */ 342 343 unsigned int ipu_policy; /* in-place-update policy */ 344 unsigned int min_ipu_util; /* in-place-update threshold */ 345 }; 346 347 /* 348 * For superblock 349 */ 350 /* 351 * COUNT_TYPE for monitoring 352 * 353 * f2fs monitors the number of several block types such as on-writeback, 354 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 355 */ 356 enum count_type { 357 F2FS_WRITEBACK, 358 F2FS_DIRTY_DENTS, 359 F2FS_DIRTY_NODES, 360 F2FS_DIRTY_META, 361 NR_COUNT_TYPE, 362 }; 363 364 /* 365 * The below are the page types of bios used in submti_bio(). 366 * The available types are: 367 * DATA User data pages. It operates as async mode. 368 * NODE Node pages. It operates as async mode. 369 * META FS metadata pages such as SIT, NAT, CP. 370 * NR_PAGE_TYPE The number of page types. 371 * META_FLUSH Make sure the previous pages are written 372 * with waiting the bio's completion 373 * ... Only can be used with META. 374 */ 375 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type)) 376 enum page_type { 377 DATA, 378 NODE, 379 META, 380 NR_PAGE_TYPE, 381 META_FLUSH, 382 }; 383 384 struct f2fs_io_info { 385 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ 386 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */ 387 }; 388 389 #define is_read_io(rw) (((rw) & 1) == READ) 390 struct f2fs_bio_info { 391 struct f2fs_sb_info *sbi; /* f2fs superblock */ 392 struct bio *bio; /* bios to merge */ 393 sector_t last_block_in_bio; /* last block number */ 394 struct f2fs_io_info fio; /* store buffered io info. */ 395 struct mutex io_mutex; /* mutex for bio */ 396 }; 397 398 struct f2fs_sb_info { 399 struct super_block *sb; /* pointer to VFS super block */ 400 struct proc_dir_entry *s_proc; /* proc entry */ 401 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 402 struct f2fs_super_block *raw_super; /* raw super block pointer */ 403 int s_dirty; /* dirty flag for checkpoint */ 404 405 /* for node-related operations */ 406 struct f2fs_nm_info *nm_info; /* node manager */ 407 struct inode *node_inode; /* cache node blocks */ 408 409 /* for segment-related operations */ 410 struct f2fs_sm_info *sm_info; /* segment manager */ 411 412 /* for bio operations */ 413 struct f2fs_bio_info read_io; /* for read bios */ 414 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */ 415 struct completion *wait_io; /* for completion bios */ 416 417 /* for checkpoint */ 418 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 419 struct inode *meta_inode; /* cache meta blocks */ 420 struct mutex cp_mutex; /* checkpoint procedure lock */ 421 struct rw_semaphore cp_rwsem; /* blocking FS operations */ 422 struct mutex node_write; /* locking node writes */ 423 struct mutex writepages; /* mutex for writepages() */ 424 bool por_doing; /* recovery is doing or not */ 425 wait_queue_head_t cp_wait; 426 427 /* for orphan inode management */ 428 struct list_head orphan_inode_list; /* orphan inode list */ 429 spinlock_t orphan_inode_lock; /* for orphan inode list */ 430 unsigned int n_orphans; /* # of orphan inodes */ 431 unsigned int max_orphans; /* max orphan inodes */ 432 433 /* for directory inode management */ 434 struct list_head dir_inode_list; /* dir inode list */ 435 spinlock_t dir_inode_lock; /* for dir inode list lock */ 436 437 /* basic file system units */ 438 unsigned int log_sectors_per_block; /* log2 sectors per block */ 439 unsigned int log_blocksize; /* log2 block size */ 440 unsigned int blocksize; /* block size */ 441 unsigned int root_ino_num; /* root inode number*/ 442 unsigned int node_ino_num; /* node inode number*/ 443 unsigned int meta_ino_num; /* meta inode number*/ 444 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 445 unsigned int blocks_per_seg; /* blocks per segment */ 446 unsigned int segs_per_sec; /* segments per section */ 447 unsigned int secs_per_zone; /* sections per zone */ 448 unsigned int total_sections; /* total section count */ 449 unsigned int total_node_count; /* total node block count */ 450 unsigned int total_valid_node_count; /* valid node block count */ 451 unsigned int total_valid_inode_count; /* valid inode count */ 452 int active_logs; /* # of active logs */ 453 int dir_level; /* directory level */ 454 455 block_t user_block_count; /* # of user blocks */ 456 block_t total_valid_block_count; /* # of valid blocks */ 457 block_t alloc_valid_block_count; /* # of allocated blocks */ 458 block_t last_valid_block_count; /* for recovery */ 459 u32 s_next_generation; /* for NFS support */ 460 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 461 462 struct f2fs_mount_info mount_opt; /* mount options */ 463 464 /* for cleaning operations */ 465 struct mutex gc_mutex; /* mutex for GC */ 466 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 467 unsigned int cur_victim_sec; /* current victim section num */ 468 469 /* maximum # of trials to find a victim segment for SSR and GC */ 470 unsigned int max_victim_search; 471 472 /* 473 * for stat information. 474 * one is for the LFS mode, and the other is for the SSR mode. 475 */ 476 #ifdef CONFIG_F2FS_STAT_FS 477 struct f2fs_stat_info *stat_info; /* FS status information */ 478 unsigned int segment_count[2]; /* # of allocated segments */ 479 unsigned int block_count[2]; /* # of allocated blocks */ 480 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 481 int inline_inode; /* # of inline_data inodes */ 482 int bg_gc; /* background gc calls */ 483 unsigned int n_dirty_dirs; /* # of dir inodes */ 484 #endif 485 unsigned int last_victim[2]; /* last victim segment # */ 486 spinlock_t stat_lock; /* lock for stat operations */ 487 488 /* For sysfs suppport */ 489 struct kobject s_kobj; 490 struct completion s_kobj_unregister; 491 }; 492 493 /* 494 * Inline functions 495 */ 496 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 497 { 498 return container_of(inode, struct f2fs_inode_info, vfs_inode); 499 } 500 501 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 502 { 503 return sb->s_fs_info; 504 } 505 506 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 507 { 508 return (struct f2fs_super_block *)(sbi->raw_super); 509 } 510 511 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 512 { 513 return (struct f2fs_checkpoint *)(sbi->ckpt); 514 } 515 516 static inline struct f2fs_node *F2FS_NODE(struct page *page) 517 { 518 return (struct f2fs_node *)page_address(page); 519 } 520 521 static inline struct f2fs_inode *F2FS_INODE(struct page *page) 522 { 523 return &((struct f2fs_node *)page_address(page))->i; 524 } 525 526 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 527 { 528 return (struct f2fs_nm_info *)(sbi->nm_info); 529 } 530 531 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 532 { 533 return (struct f2fs_sm_info *)(sbi->sm_info); 534 } 535 536 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 537 { 538 return (struct sit_info *)(SM_I(sbi)->sit_info); 539 } 540 541 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 542 { 543 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 544 } 545 546 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 547 { 548 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 549 } 550 551 static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi) 552 { 553 return sbi->meta_inode->i_mapping; 554 } 555 556 static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi) 557 { 558 return sbi->node_inode->i_mapping; 559 } 560 561 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 562 { 563 sbi->s_dirty = 1; 564 } 565 566 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 567 { 568 sbi->s_dirty = 0; 569 } 570 571 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 572 { 573 return le64_to_cpu(cp->checkpoint_ver); 574 } 575 576 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 577 { 578 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 579 return ckpt_flags & f; 580 } 581 582 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 583 { 584 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 585 ckpt_flags |= f; 586 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 587 } 588 589 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 590 { 591 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 592 ckpt_flags &= (~f); 593 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 594 } 595 596 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 597 { 598 down_read(&sbi->cp_rwsem); 599 } 600 601 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) 602 { 603 up_read(&sbi->cp_rwsem); 604 } 605 606 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) 607 { 608 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex); 609 } 610 611 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 612 { 613 up_write(&sbi->cp_rwsem); 614 } 615 616 /* 617 * Check whether the given nid is within node id range. 618 */ 619 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 620 { 621 WARN_ON((nid >= NM_I(sbi)->max_nid)); 622 if (unlikely(nid >= NM_I(sbi)->max_nid)) 623 return -EINVAL; 624 return 0; 625 } 626 627 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 628 629 /* 630 * Check whether the inode has blocks or not 631 */ 632 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 633 { 634 if (F2FS_I(inode)->i_xattr_nid) 635 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1; 636 else 637 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS; 638 } 639 640 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 641 struct inode *inode, blkcnt_t count) 642 { 643 block_t valid_block_count; 644 645 spin_lock(&sbi->stat_lock); 646 valid_block_count = 647 sbi->total_valid_block_count + (block_t)count; 648 if (unlikely(valid_block_count > sbi->user_block_count)) { 649 spin_unlock(&sbi->stat_lock); 650 return false; 651 } 652 inode->i_blocks += count; 653 sbi->total_valid_block_count = valid_block_count; 654 sbi->alloc_valid_block_count += (block_t)count; 655 spin_unlock(&sbi->stat_lock); 656 return true; 657 } 658 659 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi, 660 struct inode *inode, 661 blkcnt_t count) 662 { 663 spin_lock(&sbi->stat_lock); 664 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count); 665 f2fs_bug_on(inode->i_blocks < count); 666 inode->i_blocks -= count; 667 sbi->total_valid_block_count -= (block_t)count; 668 spin_unlock(&sbi->stat_lock); 669 } 670 671 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 672 { 673 atomic_inc(&sbi->nr_pages[count_type]); 674 F2FS_SET_SB_DIRT(sbi); 675 } 676 677 static inline void inode_inc_dirty_dents(struct inode *inode) 678 { 679 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 680 atomic_inc(&F2FS_I(inode)->dirty_dents); 681 } 682 683 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 684 { 685 atomic_dec(&sbi->nr_pages[count_type]); 686 } 687 688 static inline void inode_dec_dirty_dents(struct inode *inode) 689 { 690 if (!S_ISDIR(inode->i_mode)) 691 return; 692 693 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 694 atomic_dec(&F2FS_I(inode)->dirty_dents); 695 } 696 697 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 698 { 699 return atomic_read(&sbi->nr_pages[count_type]); 700 } 701 702 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 703 { 704 unsigned int pages_per_sec = sbi->segs_per_sec * 705 (1 << sbi->log_blocks_per_seg); 706 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 707 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 708 } 709 710 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 711 { 712 return sbi->total_valid_block_count; 713 } 714 715 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 716 { 717 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 718 719 /* return NAT or SIT bitmap */ 720 if (flag == NAT_BITMAP) 721 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 722 else if (flag == SIT_BITMAP) 723 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 724 725 return 0; 726 } 727 728 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 729 { 730 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 731 int offset = (flag == NAT_BITMAP) ? 732 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 733 return &ckpt->sit_nat_version_bitmap + offset; 734 } 735 736 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 737 { 738 block_t start_addr; 739 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 740 unsigned long long ckpt_version = cur_cp_version(ckpt); 741 742 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 743 744 /* 745 * odd numbered checkpoint should at cp segment 0 746 * and even segent must be at cp segment 1 747 */ 748 if (!(ckpt_version & 1)) 749 start_addr += sbi->blocks_per_seg; 750 751 return start_addr; 752 } 753 754 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 755 { 756 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 757 } 758 759 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 760 struct inode *inode) 761 { 762 block_t valid_block_count; 763 unsigned int valid_node_count; 764 765 spin_lock(&sbi->stat_lock); 766 767 valid_block_count = sbi->total_valid_block_count + 1; 768 if (unlikely(valid_block_count > sbi->user_block_count)) { 769 spin_unlock(&sbi->stat_lock); 770 return false; 771 } 772 773 valid_node_count = sbi->total_valid_node_count + 1; 774 if (unlikely(valid_node_count > sbi->total_node_count)) { 775 spin_unlock(&sbi->stat_lock); 776 return false; 777 } 778 779 if (inode) 780 inode->i_blocks++; 781 782 sbi->alloc_valid_block_count++; 783 sbi->total_valid_node_count++; 784 sbi->total_valid_block_count++; 785 spin_unlock(&sbi->stat_lock); 786 787 return true; 788 } 789 790 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 791 struct inode *inode) 792 { 793 spin_lock(&sbi->stat_lock); 794 795 f2fs_bug_on(!sbi->total_valid_block_count); 796 f2fs_bug_on(!sbi->total_valid_node_count); 797 f2fs_bug_on(!inode->i_blocks); 798 799 inode->i_blocks--; 800 sbi->total_valid_node_count--; 801 sbi->total_valid_block_count--; 802 803 spin_unlock(&sbi->stat_lock); 804 } 805 806 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 807 { 808 return sbi->total_valid_node_count; 809 } 810 811 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 812 { 813 spin_lock(&sbi->stat_lock); 814 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count); 815 sbi->total_valid_inode_count++; 816 spin_unlock(&sbi->stat_lock); 817 } 818 819 static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi) 820 { 821 spin_lock(&sbi->stat_lock); 822 f2fs_bug_on(!sbi->total_valid_inode_count); 823 sbi->total_valid_inode_count--; 824 spin_unlock(&sbi->stat_lock); 825 } 826 827 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 828 { 829 return sbi->total_valid_inode_count; 830 } 831 832 static inline void f2fs_put_page(struct page *page, int unlock) 833 { 834 if (!page) 835 return; 836 837 if (unlock) { 838 f2fs_bug_on(!PageLocked(page)); 839 unlock_page(page); 840 } 841 page_cache_release(page); 842 } 843 844 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 845 { 846 if (dn->node_page) 847 f2fs_put_page(dn->node_page, 1); 848 if (dn->inode_page && dn->node_page != dn->inode_page) 849 f2fs_put_page(dn->inode_page, 0); 850 dn->node_page = NULL; 851 dn->inode_page = NULL; 852 } 853 854 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 855 size_t size) 856 { 857 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL); 858 } 859 860 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 861 gfp_t flags) 862 { 863 void *entry; 864 retry: 865 entry = kmem_cache_alloc(cachep, flags); 866 if (!entry) { 867 cond_resched(); 868 goto retry; 869 } 870 871 return entry; 872 } 873 874 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 875 876 static inline bool IS_INODE(struct page *page) 877 { 878 struct f2fs_node *p = F2FS_NODE(page); 879 return RAW_IS_INODE(p); 880 } 881 882 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 883 { 884 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 885 } 886 887 static inline block_t datablock_addr(struct page *node_page, 888 unsigned int offset) 889 { 890 struct f2fs_node *raw_node; 891 __le32 *addr_array; 892 raw_node = F2FS_NODE(node_page); 893 addr_array = blkaddr_in_node(raw_node); 894 return le32_to_cpu(addr_array[offset]); 895 } 896 897 static inline int f2fs_test_bit(unsigned int nr, char *addr) 898 { 899 int mask; 900 901 addr += (nr >> 3); 902 mask = 1 << (7 - (nr & 0x07)); 903 return mask & *addr; 904 } 905 906 static inline int f2fs_set_bit(unsigned int nr, char *addr) 907 { 908 int mask; 909 int ret; 910 911 addr += (nr >> 3); 912 mask = 1 << (7 - (nr & 0x07)); 913 ret = mask & *addr; 914 *addr |= mask; 915 return ret; 916 } 917 918 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 919 { 920 int mask; 921 int ret; 922 923 addr += (nr >> 3); 924 mask = 1 << (7 - (nr & 0x07)); 925 ret = mask & *addr; 926 *addr &= ~mask; 927 return ret; 928 } 929 930 /* used for f2fs_inode_info->flags */ 931 enum { 932 FI_NEW_INODE, /* indicate newly allocated inode */ 933 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 934 FI_INC_LINK, /* need to increment i_nlink */ 935 FI_ACL_MODE, /* indicate acl mode */ 936 FI_NO_ALLOC, /* should not allocate any blocks */ 937 FI_UPDATE_DIR, /* should update inode block for consistency */ 938 FI_DELAY_IPUT, /* used for the recovery */ 939 FI_NO_EXTENT, /* not to use the extent cache */ 940 FI_INLINE_XATTR, /* used for inline xattr */ 941 FI_INLINE_DATA, /* used for inline data*/ 942 }; 943 944 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 945 { 946 set_bit(flag, &fi->flags); 947 } 948 949 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 950 { 951 return test_bit(flag, &fi->flags); 952 } 953 954 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 955 { 956 clear_bit(flag, &fi->flags); 957 } 958 959 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 960 { 961 fi->i_acl_mode = mode; 962 set_inode_flag(fi, FI_ACL_MODE); 963 } 964 965 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 966 { 967 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 968 clear_inode_flag(fi, FI_ACL_MODE); 969 return 1; 970 } 971 return 0; 972 } 973 974 static inline void get_inline_info(struct f2fs_inode_info *fi, 975 struct f2fs_inode *ri) 976 { 977 if (ri->i_inline & F2FS_INLINE_XATTR) 978 set_inode_flag(fi, FI_INLINE_XATTR); 979 if (ri->i_inline & F2FS_INLINE_DATA) 980 set_inode_flag(fi, FI_INLINE_DATA); 981 } 982 983 static inline void set_raw_inline(struct f2fs_inode_info *fi, 984 struct f2fs_inode *ri) 985 { 986 ri->i_inline = 0; 987 988 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 989 ri->i_inline |= F2FS_INLINE_XATTR; 990 if (is_inode_flag_set(fi, FI_INLINE_DATA)) 991 ri->i_inline |= F2FS_INLINE_DATA; 992 } 993 994 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 995 { 996 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 997 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 998 return DEF_ADDRS_PER_INODE; 999 } 1000 1001 static inline void *inline_xattr_addr(struct page *page) 1002 { 1003 struct f2fs_inode *ri = F2FS_INODE(page); 1004 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - 1005 F2FS_INLINE_XATTR_ADDRS]); 1006 } 1007 1008 static inline int inline_xattr_size(struct inode *inode) 1009 { 1010 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR)) 1011 return F2FS_INLINE_XATTR_ADDRS << 2; 1012 else 1013 return 0; 1014 } 1015 1016 static inline int f2fs_has_inline_data(struct inode *inode) 1017 { 1018 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA); 1019 } 1020 1021 static inline void *inline_data_addr(struct page *page) 1022 { 1023 struct f2fs_inode *ri = F2FS_INODE(page); 1024 return (void *)&(ri->i_addr[1]); 1025 } 1026 1027 static inline int f2fs_readonly(struct super_block *sb) 1028 { 1029 return sb->s_flags & MS_RDONLY; 1030 } 1031 1032 static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi) 1033 { 1034 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); 1035 sbi->sb->s_flags |= MS_RDONLY; 1036 } 1037 1038 #define get_inode_mode(i) \ 1039 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \ 1040 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode)) 1041 1042 /* 1043 * file.c 1044 */ 1045 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 1046 void truncate_data_blocks(struct dnode_of_data *); 1047 int truncate_blocks(struct inode *, u64); 1048 void f2fs_truncate(struct inode *); 1049 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 1050 int f2fs_setattr(struct dentry *, struct iattr *); 1051 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 1052 int truncate_data_blocks_range(struct dnode_of_data *, int); 1053 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 1054 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 1055 1056 /* 1057 * inode.c 1058 */ 1059 void f2fs_set_inode_flags(struct inode *); 1060 struct inode *f2fs_iget(struct super_block *, unsigned long); 1061 int try_to_free_nats(struct f2fs_sb_info *, int); 1062 void update_inode(struct inode *, struct page *); 1063 void update_inode_page(struct inode *); 1064 int f2fs_write_inode(struct inode *, struct writeback_control *); 1065 void f2fs_evict_inode(struct inode *); 1066 1067 /* 1068 * namei.c 1069 */ 1070 struct dentry *f2fs_get_parent(struct dentry *child); 1071 1072 /* 1073 * dir.c 1074 */ 1075 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 1076 struct page **); 1077 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 1078 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 1079 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 1080 struct page *, struct inode *); 1081 int update_dent_inode(struct inode *, const struct qstr *); 1082 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 1083 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 1084 int f2fs_make_empty(struct inode *, struct inode *); 1085 bool f2fs_empty_dir(struct inode *); 1086 1087 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1088 { 1089 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1090 inode); 1091 } 1092 1093 /* 1094 * super.c 1095 */ 1096 int f2fs_sync_fs(struct super_block *, int); 1097 extern __printf(3, 4) 1098 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1099 1100 /* 1101 * hash.c 1102 */ 1103 f2fs_hash_t f2fs_dentry_hash(const char *, size_t); 1104 1105 /* 1106 * node.c 1107 */ 1108 struct dnode_of_data; 1109 struct node_info; 1110 1111 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1112 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1113 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1114 int truncate_inode_blocks(struct inode *, pgoff_t); 1115 int truncate_xattr_node(struct inode *, struct page *); 1116 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t); 1117 void remove_inode_page(struct inode *); 1118 struct page *new_inode_page(struct inode *, const struct qstr *); 1119 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1120 void ra_node_page(struct f2fs_sb_info *, nid_t); 1121 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1122 struct page *get_node_page_ra(struct page *, int); 1123 void sync_inode_page(struct dnode_of_data *); 1124 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1125 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1126 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1127 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1128 void recover_node_page(struct f2fs_sb_info *, struct page *, 1129 struct f2fs_summary *, struct node_info *, block_t); 1130 bool recover_xattr_data(struct inode *, struct page *, block_t); 1131 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1132 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1133 struct f2fs_summary_block *); 1134 void flush_nat_entries(struct f2fs_sb_info *); 1135 int build_node_manager(struct f2fs_sb_info *); 1136 void destroy_node_manager(struct f2fs_sb_info *); 1137 int __init create_node_manager_caches(void); 1138 void destroy_node_manager_caches(void); 1139 1140 /* 1141 * segment.c 1142 */ 1143 void f2fs_balance_fs(struct f2fs_sb_info *); 1144 void f2fs_balance_fs_bg(struct f2fs_sb_info *); 1145 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1146 void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); 1147 void clear_prefree_segments(struct f2fs_sb_info *); 1148 int npages_for_summary_flush(struct f2fs_sb_info *); 1149 void allocate_new_segments(struct f2fs_sb_info *); 1150 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1151 void write_meta_page(struct f2fs_sb_info *, struct page *); 1152 void write_node_page(struct f2fs_sb_info *, struct page *, 1153 struct f2fs_io_info *, unsigned int, block_t, block_t *); 1154 void write_data_page(struct page *, struct dnode_of_data *, block_t *, 1155 struct f2fs_io_info *); 1156 void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *); 1157 void recover_data_page(struct f2fs_sb_info *, struct page *, 1158 struct f2fs_summary *, block_t, block_t); 1159 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 1160 struct f2fs_summary *, block_t, block_t); 1161 void allocate_data_block(struct f2fs_sb_info *, struct page *, 1162 block_t, block_t *, struct f2fs_summary *, int); 1163 void f2fs_wait_on_page_writeback(struct page *, enum page_type); 1164 void write_data_summaries(struct f2fs_sb_info *, block_t); 1165 void write_node_summaries(struct f2fs_sb_info *, block_t); 1166 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1167 int, unsigned int, int); 1168 void flush_sit_entries(struct f2fs_sb_info *); 1169 int build_segment_manager(struct f2fs_sb_info *); 1170 void destroy_segment_manager(struct f2fs_sb_info *); 1171 int __init create_segment_manager_caches(void); 1172 void destroy_segment_manager_caches(void); 1173 1174 /* 1175 * checkpoint.c 1176 */ 1177 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1178 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1179 int ra_meta_pages(struct f2fs_sb_info *, int, int, int); 1180 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1181 int acquire_orphan_inode(struct f2fs_sb_info *); 1182 void release_orphan_inode(struct f2fs_sb_info *); 1183 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1184 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1185 void recover_orphan_inodes(struct f2fs_sb_info *); 1186 int get_valid_checkpoint(struct f2fs_sb_info *); 1187 void set_dirty_dir_page(struct inode *, struct page *); 1188 void add_dirty_dir_inode(struct inode *); 1189 void remove_dirty_dir_inode(struct inode *); 1190 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t); 1191 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1192 void write_checkpoint(struct f2fs_sb_info *, bool); 1193 void init_orphan_info(struct f2fs_sb_info *); 1194 int __init create_checkpoint_caches(void); 1195 void destroy_checkpoint_caches(void); 1196 1197 /* 1198 * data.c 1199 */ 1200 void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int); 1201 int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int); 1202 void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t, 1203 struct f2fs_io_info *); 1204 int reserve_new_block(struct dnode_of_data *); 1205 int f2fs_reserve_block(struct dnode_of_data *, pgoff_t); 1206 void update_extent_cache(block_t, struct dnode_of_data *); 1207 struct page *find_data_page(struct inode *, pgoff_t, bool); 1208 struct page *get_lock_data_page(struct inode *, pgoff_t); 1209 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1210 int do_write_data_page(struct page *, struct f2fs_io_info *); 1211 1212 /* 1213 * gc.c 1214 */ 1215 int start_gc_thread(struct f2fs_sb_info *); 1216 void stop_gc_thread(struct f2fs_sb_info *); 1217 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1218 int f2fs_gc(struct f2fs_sb_info *); 1219 void build_gc_manager(struct f2fs_sb_info *); 1220 int __init create_gc_caches(void); 1221 void destroy_gc_caches(void); 1222 1223 /* 1224 * recovery.c 1225 */ 1226 int recover_fsync_data(struct f2fs_sb_info *); 1227 bool space_for_roll_forward(struct f2fs_sb_info *); 1228 1229 /* 1230 * debug.c 1231 */ 1232 #ifdef CONFIG_F2FS_STAT_FS 1233 struct f2fs_stat_info { 1234 struct list_head stat_list; 1235 struct f2fs_sb_info *sbi; 1236 struct mutex stat_lock; 1237 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1238 int main_area_segs, main_area_sections, main_area_zones; 1239 int hit_ext, total_ext; 1240 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1241 int nats, sits, fnids; 1242 int total_count, utilization; 1243 int bg_gc, inline_inode; 1244 unsigned int valid_count, valid_node_count, valid_inode_count; 1245 unsigned int bimodal, avg_vblocks; 1246 int util_free, util_valid, util_invalid; 1247 int rsvd_segs, overp_segs; 1248 int dirty_count, node_pages, meta_pages; 1249 int prefree_count, call_count, cp_count; 1250 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1251 int tot_blks, data_blks, node_blks; 1252 int curseg[NR_CURSEG_TYPE]; 1253 int cursec[NR_CURSEG_TYPE]; 1254 int curzone[NR_CURSEG_TYPE]; 1255 1256 unsigned int segment_count[2]; 1257 unsigned int block_count[2]; 1258 unsigned base_mem, cache_mem; 1259 }; 1260 1261 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1262 { 1263 return (struct f2fs_stat_info *)sbi->stat_info; 1264 } 1265 1266 #define stat_inc_cp_count(si) ((si)->cp_count++) 1267 #define stat_inc_call_count(si) ((si)->call_count++) 1268 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) 1269 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) 1270 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) 1271 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) 1272 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) 1273 #define stat_inc_inline_inode(inode) \ 1274 do { \ 1275 if (f2fs_has_inline_data(inode)) \ 1276 ((F2FS_SB(inode->i_sb))->inline_inode++); \ 1277 } while (0) 1278 #define stat_dec_inline_inode(inode) \ 1279 do { \ 1280 if (f2fs_has_inline_data(inode)) \ 1281 ((F2FS_SB(inode->i_sb))->inline_inode--); \ 1282 } while (0) 1283 1284 #define stat_inc_seg_type(sbi, curseg) \ 1285 ((sbi)->segment_count[(curseg)->alloc_type]++) 1286 #define stat_inc_block_count(sbi, curseg) \ 1287 ((sbi)->block_count[(curseg)->alloc_type]++) 1288 1289 #define stat_inc_seg_count(sbi, type) \ 1290 do { \ 1291 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1292 (si)->tot_segs++; \ 1293 if (type == SUM_TYPE_DATA) \ 1294 si->data_segs++; \ 1295 else \ 1296 si->node_segs++; \ 1297 } while (0) 1298 1299 #define stat_inc_tot_blk_count(si, blks) \ 1300 (si->tot_blks += (blks)) 1301 1302 #define stat_inc_data_blk_count(sbi, blks) \ 1303 do { \ 1304 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1305 stat_inc_tot_blk_count(si, blks); \ 1306 si->data_blks += (blks); \ 1307 } while (0) 1308 1309 #define stat_inc_node_blk_count(sbi, blks) \ 1310 do { \ 1311 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1312 stat_inc_tot_blk_count(si, blks); \ 1313 si->node_blks += (blks); \ 1314 } while (0) 1315 1316 int f2fs_build_stats(struct f2fs_sb_info *); 1317 void f2fs_destroy_stats(struct f2fs_sb_info *); 1318 void __init f2fs_create_root_stats(void); 1319 void f2fs_destroy_root_stats(void); 1320 #else 1321 #define stat_inc_cp_count(si) 1322 #define stat_inc_call_count(si) 1323 #define stat_inc_bggc_count(si) 1324 #define stat_inc_dirty_dir(sbi) 1325 #define stat_dec_dirty_dir(sbi) 1326 #define stat_inc_total_hit(sb) 1327 #define stat_inc_read_hit(sb) 1328 #define stat_inc_inline_inode(inode) 1329 #define stat_dec_inline_inode(inode) 1330 #define stat_inc_seg_type(sbi, curseg) 1331 #define stat_inc_block_count(sbi, curseg) 1332 #define stat_inc_seg_count(si, type) 1333 #define stat_inc_tot_blk_count(si, blks) 1334 #define stat_inc_data_blk_count(si, blks) 1335 #define stat_inc_node_blk_count(sbi, blks) 1336 1337 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1338 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1339 static inline void __init f2fs_create_root_stats(void) { } 1340 static inline void f2fs_destroy_root_stats(void) { } 1341 #endif 1342 1343 extern const struct file_operations f2fs_dir_operations; 1344 extern const struct file_operations f2fs_file_operations; 1345 extern const struct inode_operations f2fs_file_inode_operations; 1346 extern const struct address_space_operations f2fs_dblock_aops; 1347 extern const struct address_space_operations f2fs_node_aops; 1348 extern const struct address_space_operations f2fs_meta_aops; 1349 extern const struct inode_operations f2fs_dir_inode_operations; 1350 extern const struct inode_operations f2fs_symlink_inode_operations; 1351 extern const struct inode_operations f2fs_special_inode_operations; 1352 1353 /* 1354 * inline.c 1355 */ 1356 bool f2fs_may_inline(struct inode *); 1357 int f2fs_read_inline_data(struct inode *, struct page *); 1358 int f2fs_convert_inline_data(struct inode *, pgoff_t); 1359 int f2fs_write_inline_data(struct inode *, struct page *, unsigned int); 1360 int recover_inline_data(struct inode *, struct page *); 1361 #endif 1362