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 readahead 93 */ 94 enum { 95 META_CP, 96 META_NAT, 97 META_SIT 98 }; 99 100 /* for the list of orphan inodes */ 101 struct orphan_inode_entry { 102 struct list_head list; /* list head */ 103 nid_t ino; /* inode number */ 104 }; 105 106 /* for the list of directory inodes */ 107 struct dir_inode_entry { 108 struct list_head list; /* list head */ 109 struct inode *inode; /* vfs inode pointer */ 110 }; 111 112 /* for the list of blockaddresses to be discarded */ 113 struct discard_entry { 114 struct list_head list; /* list head */ 115 block_t blkaddr; /* block address to be discarded */ 116 int len; /* # of consecutive blocks of the discard */ 117 }; 118 119 /* for the list of fsync inodes, used only during recovery */ 120 struct fsync_inode_entry { 121 struct list_head list; /* list head */ 122 struct inode *inode; /* vfs inode pointer */ 123 block_t blkaddr; /* block address locating the last inode */ 124 }; 125 126 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 127 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 128 129 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 130 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 131 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 132 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 133 134 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 135 { 136 int before = nats_in_cursum(rs); 137 rs->n_nats = cpu_to_le16(before + i); 138 return before; 139 } 140 141 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 142 { 143 int before = sits_in_cursum(rs); 144 rs->n_sits = cpu_to_le16(before + i); 145 return before; 146 } 147 148 /* 149 * ioctl commands 150 */ 151 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 152 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 153 154 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 155 /* 156 * ioctl commands in 32 bit emulation 157 */ 158 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 159 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 160 #endif 161 162 /* 163 * For INODE and NODE manager 164 */ 165 /* 166 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 167 * as its node offset to distinguish from index node blocks. 168 * But some bits are used to mark the node block. 169 */ 170 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 171 >> OFFSET_BIT_SHIFT) 172 enum { 173 ALLOC_NODE, /* allocate a new node page if needed */ 174 LOOKUP_NODE, /* look up a node without readahead */ 175 LOOKUP_NODE_RA, /* 176 * look up a node with readahead called 177 * by get_data_block. 178 */ 179 }; 180 181 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 182 183 /* for in-memory extent cache entry */ 184 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */ 185 186 struct extent_info { 187 rwlock_t ext_lock; /* rwlock for consistency */ 188 unsigned int fofs; /* start offset in a file */ 189 u32 blk_addr; /* start block address of the extent */ 190 unsigned int len; /* length of the extent */ 191 }; 192 193 /* 194 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 195 */ 196 #define FADVISE_COLD_BIT 0x01 197 #define FADVISE_LOST_PINO_BIT 0x02 198 199 #define DEF_DIR_LEVEL 0 200 201 struct f2fs_inode_info { 202 struct inode vfs_inode; /* serve a vfs inode */ 203 unsigned long i_flags; /* keep an inode flags for ioctl */ 204 unsigned char i_advise; /* use to give file attribute hints */ 205 unsigned char i_dir_level; /* use for dentry level for large dir */ 206 unsigned int i_current_depth; /* use only in directory structure */ 207 unsigned int i_pino; /* parent inode number */ 208 umode_t i_acl_mode; /* keep file acl mode temporarily */ 209 210 /* Use below internally in f2fs*/ 211 unsigned long flags; /* use to pass per-file flags */ 212 atomic_t dirty_dents; /* # of dirty dentry pages */ 213 f2fs_hash_t chash; /* hash value of given file name */ 214 unsigned int clevel; /* maximum level of given file name */ 215 nid_t i_xattr_nid; /* node id that contains xattrs */ 216 unsigned long long xattr_ver; /* cp version of xattr modification */ 217 struct extent_info ext; /* in-memory extent cache entry */ 218 }; 219 220 static inline void get_extent_info(struct extent_info *ext, 221 struct f2fs_extent i_ext) 222 { 223 write_lock(&ext->ext_lock); 224 ext->fofs = le32_to_cpu(i_ext.fofs); 225 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 226 ext->len = le32_to_cpu(i_ext.len); 227 write_unlock(&ext->ext_lock); 228 } 229 230 static inline void set_raw_extent(struct extent_info *ext, 231 struct f2fs_extent *i_ext) 232 { 233 read_lock(&ext->ext_lock); 234 i_ext->fofs = cpu_to_le32(ext->fofs); 235 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 236 i_ext->len = cpu_to_le32(ext->len); 237 read_unlock(&ext->ext_lock); 238 } 239 240 struct f2fs_nm_info { 241 block_t nat_blkaddr; /* base disk address of NAT */ 242 nid_t max_nid; /* maximum possible node ids */ 243 nid_t next_scan_nid; /* the next nid to be scanned */ 244 245 /* NAT cache management */ 246 struct radix_tree_root nat_root;/* root of the nat entry cache */ 247 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 248 unsigned int nat_cnt; /* the # of cached nat entries */ 249 struct list_head nat_entries; /* cached nat entry list (clean) */ 250 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 251 252 /* free node ids management */ 253 struct radix_tree_root free_nid_root;/* root of the free_nid cache */ 254 struct list_head free_nid_list; /* a list for free nids */ 255 spinlock_t free_nid_list_lock; /* protect free nid list */ 256 unsigned int fcnt; /* the number of free node id */ 257 struct mutex build_lock; /* lock for build free nids */ 258 259 /* for checkpoint */ 260 char *nat_bitmap; /* NAT bitmap pointer */ 261 int bitmap_size; /* bitmap size */ 262 }; 263 264 /* 265 * this structure is used as one of function parameters. 266 * all the information are dedicated to a given direct node block determined 267 * by the data offset in a file. 268 */ 269 struct dnode_of_data { 270 struct inode *inode; /* vfs inode pointer */ 271 struct page *inode_page; /* its inode page, NULL is possible */ 272 struct page *node_page; /* cached direct node page */ 273 nid_t nid; /* node id of the direct node block */ 274 unsigned int ofs_in_node; /* data offset in the node page */ 275 bool inode_page_locked; /* inode page is locked or not */ 276 block_t data_blkaddr; /* block address of the node block */ 277 }; 278 279 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 280 struct page *ipage, struct page *npage, nid_t nid) 281 { 282 memset(dn, 0, sizeof(*dn)); 283 dn->inode = inode; 284 dn->inode_page = ipage; 285 dn->node_page = npage; 286 dn->nid = nid; 287 } 288 289 /* 290 * For SIT manager 291 * 292 * By default, there are 6 active log areas across the whole main area. 293 * When considering hot and cold data separation to reduce cleaning overhead, 294 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 295 * respectively. 296 * In the current design, you should not change the numbers intentionally. 297 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 298 * logs individually according to the underlying devices. (default: 6) 299 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 300 * data and 8 for node logs. 301 */ 302 #define NR_CURSEG_DATA_TYPE (3) 303 #define NR_CURSEG_NODE_TYPE (3) 304 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 305 306 enum { 307 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 308 CURSEG_WARM_DATA, /* data blocks */ 309 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 310 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 311 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 312 CURSEG_COLD_NODE, /* indirect node blocks */ 313 NO_CHECK_TYPE 314 }; 315 316 struct f2fs_sm_info { 317 struct sit_info *sit_info; /* whole segment information */ 318 struct free_segmap_info *free_info; /* free segment information */ 319 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 320 struct curseg_info *curseg_array; /* active segment information */ 321 322 struct list_head wblist_head; /* list of under-writeback pages */ 323 spinlock_t wblist_lock; /* lock for checkpoint */ 324 325 block_t seg0_blkaddr; /* block address of 0'th segment */ 326 block_t main_blkaddr; /* start block address of main area */ 327 block_t ssa_blkaddr; /* start block address of SSA area */ 328 329 unsigned int segment_count; /* total # of segments */ 330 unsigned int main_segments; /* # of segments in main area */ 331 unsigned int reserved_segments; /* # of reserved segments */ 332 unsigned int ovp_segments; /* # of overprovision segments */ 333 334 /* a threshold to reclaim prefree segments */ 335 unsigned int rec_prefree_segments; 336 337 /* for small discard management */ 338 struct list_head discard_list; /* 4KB discard list */ 339 int nr_discards; /* # of discards in the list */ 340 int max_discards; /* max. discards to be issued */ 341 342 unsigned int ipu_policy; /* in-place-update policy */ 343 unsigned int min_ipu_util; /* in-place-update threshold */ 344 }; 345 346 /* 347 * For superblock 348 */ 349 /* 350 * COUNT_TYPE for monitoring 351 * 352 * f2fs monitors the number of several block types such as on-writeback, 353 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 354 */ 355 enum count_type { 356 F2FS_WRITEBACK, 357 F2FS_DIRTY_DENTS, 358 F2FS_DIRTY_NODES, 359 F2FS_DIRTY_META, 360 NR_COUNT_TYPE, 361 }; 362 363 /* 364 * The below are the page types of bios used in submti_bio(). 365 * The available types are: 366 * DATA User data pages. It operates as async mode. 367 * NODE Node pages. It operates as async mode. 368 * META FS metadata pages such as SIT, NAT, CP. 369 * NR_PAGE_TYPE The number of page types. 370 * META_FLUSH Make sure the previous pages are written 371 * with waiting the bio's completion 372 * ... Only can be used with META. 373 */ 374 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type)) 375 enum page_type { 376 DATA, 377 NODE, 378 META, 379 NR_PAGE_TYPE, 380 META_FLUSH, 381 }; 382 383 struct f2fs_io_info { 384 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ 385 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */ 386 }; 387 388 #define is_read_io(rw) (((rw) & 1) == READ) 389 struct f2fs_bio_info { 390 struct f2fs_sb_info *sbi; /* f2fs superblock */ 391 struct bio *bio; /* bios to merge */ 392 sector_t last_block_in_bio; /* last block number */ 393 struct f2fs_io_info fio; /* store buffered io info. */ 394 struct mutex io_mutex; /* mutex for bio */ 395 }; 396 397 struct f2fs_sb_info { 398 struct super_block *sb; /* pointer to VFS super block */ 399 struct proc_dir_entry *s_proc; /* proc entry */ 400 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 401 struct f2fs_super_block *raw_super; /* raw super block pointer */ 402 int s_dirty; /* dirty flag for checkpoint */ 403 404 /* for node-related operations */ 405 struct f2fs_nm_info *nm_info; /* node manager */ 406 struct inode *node_inode; /* cache node blocks */ 407 408 /* for segment-related operations */ 409 struct f2fs_sm_info *sm_info; /* segment manager */ 410 411 /* for bio operations */ 412 struct f2fs_bio_info read_io; /* for read bios */ 413 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */ 414 struct completion *wait_io; /* for completion bios */ 415 416 /* for checkpoint */ 417 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 418 struct inode *meta_inode; /* cache meta blocks */ 419 struct mutex cp_mutex; /* checkpoint procedure lock */ 420 struct rw_semaphore cp_rwsem; /* blocking FS operations */ 421 struct mutex node_write; /* locking node writes */ 422 struct mutex writepages; /* mutex for writepages() */ 423 bool por_doing; /* recovery is doing or not */ 424 wait_queue_head_t cp_wait; 425 426 /* for orphan inode management */ 427 struct list_head orphan_inode_list; /* orphan inode list */ 428 spinlock_t orphan_inode_lock; /* for orphan inode list */ 429 unsigned int n_orphans; /* # of orphan inodes */ 430 unsigned int max_orphans; /* max orphan inodes */ 431 432 /* for directory inode management */ 433 struct list_head dir_inode_list; /* dir inode list */ 434 spinlock_t dir_inode_lock; /* for dir inode list lock */ 435 436 /* basic file system units */ 437 unsigned int log_sectors_per_block; /* log2 sectors per block */ 438 unsigned int log_blocksize; /* log2 block size */ 439 unsigned int blocksize; /* block size */ 440 unsigned int root_ino_num; /* root inode number*/ 441 unsigned int node_ino_num; /* node inode number*/ 442 unsigned int meta_ino_num; /* meta inode number*/ 443 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 444 unsigned int blocks_per_seg; /* blocks per segment */ 445 unsigned int segs_per_sec; /* segments per section */ 446 unsigned int secs_per_zone; /* sections per zone */ 447 unsigned int total_sections; /* total section count */ 448 unsigned int total_node_count; /* total node block count */ 449 unsigned int total_valid_node_count; /* valid node block count */ 450 unsigned int total_valid_inode_count; /* valid inode count */ 451 int active_logs; /* # of active logs */ 452 int dir_level; /* directory level */ 453 454 block_t user_block_count; /* # of user blocks */ 455 block_t total_valid_block_count; /* # of valid blocks */ 456 block_t alloc_valid_block_count; /* # of allocated blocks */ 457 block_t last_valid_block_count; /* for recovery */ 458 u32 s_next_generation; /* for NFS support */ 459 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 460 461 struct f2fs_mount_info mount_opt; /* mount options */ 462 463 /* for cleaning operations */ 464 struct mutex gc_mutex; /* mutex for GC */ 465 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 466 unsigned int cur_victim_sec; /* current victim section num */ 467 468 /* maximum # of trials to find a victim segment for SSR and GC */ 469 unsigned int max_victim_search; 470 471 /* 472 * for stat information. 473 * one is for the LFS mode, and the other is for the SSR mode. 474 */ 475 #ifdef CONFIG_F2FS_STAT_FS 476 struct f2fs_stat_info *stat_info; /* FS status information */ 477 unsigned int segment_count[2]; /* # of allocated segments */ 478 unsigned int block_count[2]; /* # of allocated blocks */ 479 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 480 int inline_inode; /* # of inline_data inodes */ 481 int bg_gc; /* background gc calls */ 482 unsigned int n_dirty_dirs; /* # of dir inodes */ 483 #endif 484 unsigned int last_victim[2]; /* last victim segment # */ 485 spinlock_t stat_lock; /* lock for stat operations */ 486 487 /* For sysfs suppport */ 488 struct kobject s_kobj; 489 struct completion s_kobj_unregister; 490 }; 491 492 /* 493 * Inline functions 494 */ 495 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 496 { 497 return container_of(inode, struct f2fs_inode_info, vfs_inode); 498 } 499 500 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 501 { 502 return sb->s_fs_info; 503 } 504 505 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 506 { 507 return (struct f2fs_super_block *)(sbi->raw_super); 508 } 509 510 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 511 { 512 return (struct f2fs_checkpoint *)(sbi->ckpt); 513 } 514 515 static inline struct f2fs_node *F2FS_NODE(struct page *page) 516 { 517 return (struct f2fs_node *)page_address(page); 518 } 519 520 static inline struct f2fs_inode *F2FS_INODE(struct page *page) 521 { 522 return &((struct f2fs_node *)page_address(page))->i; 523 } 524 525 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 526 { 527 return (struct f2fs_nm_info *)(sbi->nm_info); 528 } 529 530 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 531 { 532 return (struct f2fs_sm_info *)(sbi->sm_info); 533 } 534 535 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 536 { 537 return (struct sit_info *)(SM_I(sbi)->sit_info); 538 } 539 540 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 541 { 542 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 543 } 544 545 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 546 { 547 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 548 } 549 550 static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi) 551 { 552 return sbi->meta_inode->i_mapping; 553 } 554 555 static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi) 556 { 557 return sbi->node_inode->i_mapping; 558 } 559 560 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 561 { 562 sbi->s_dirty = 1; 563 } 564 565 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 566 { 567 sbi->s_dirty = 0; 568 } 569 570 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 571 { 572 return le64_to_cpu(cp->checkpoint_ver); 573 } 574 575 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 576 { 577 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 578 return ckpt_flags & f; 579 } 580 581 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 582 { 583 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 584 ckpt_flags |= f; 585 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 586 } 587 588 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 589 { 590 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 591 ckpt_flags &= (~f); 592 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 593 } 594 595 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 596 { 597 down_read(&sbi->cp_rwsem); 598 } 599 600 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) 601 { 602 up_read(&sbi->cp_rwsem); 603 } 604 605 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) 606 { 607 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex); 608 } 609 610 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 611 { 612 up_write(&sbi->cp_rwsem); 613 } 614 615 /* 616 * Check whether the given nid is within node id range. 617 */ 618 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 619 { 620 WARN_ON((nid >= NM_I(sbi)->max_nid)); 621 if (unlikely(nid >= NM_I(sbi)->max_nid)) 622 return -EINVAL; 623 return 0; 624 } 625 626 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 627 628 /* 629 * Check whether the inode has blocks or not 630 */ 631 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 632 { 633 if (F2FS_I(inode)->i_xattr_nid) 634 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1; 635 else 636 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS; 637 } 638 639 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 640 struct inode *inode, blkcnt_t count) 641 { 642 block_t valid_block_count; 643 644 spin_lock(&sbi->stat_lock); 645 valid_block_count = 646 sbi->total_valid_block_count + (block_t)count; 647 if (unlikely(valid_block_count > sbi->user_block_count)) { 648 spin_unlock(&sbi->stat_lock); 649 return false; 650 } 651 inode->i_blocks += count; 652 sbi->total_valid_block_count = valid_block_count; 653 sbi->alloc_valid_block_count += (block_t)count; 654 spin_unlock(&sbi->stat_lock); 655 return true; 656 } 657 658 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi, 659 struct inode *inode, 660 blkcnt_t count) 661 { 662 spin_lock(&sbi->stat_lock); 663 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count); 664 f2fs_bug_on(inode->i_blocks < count); 665 inode->i_blocks -= count; 666 sbi->total_valid_block_count -= (block_t)count; 667 spin_unlock(&sbi->stat_lock); 668 } 669 670 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 671 { 672 atomic_inc(&sbi->nr_pages[count_type]); 673 F2FS_SET_SB_DIRT(sbi); 674 } 675 676 static inline void inode_inc_dirty_dents(struct inode *inode) 677 { 678 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 679 atomic_inc(&F2FS_I(inode)->dirty_dents); 680 } 681 682 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 683 { 684 atomic_dec(&sbi->nr_pages[count_type]); 685 } 686 687 static inline void inode_dec_dirty_dents(struct inode *inode) 688 { 689 if (!S_ISDIR(inode->i_mode)) 690 return; 691 692 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 693 atomic_dec(&F2FS_I(inode)->dirty_dents); 694 } 695 696 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 697 { 698 return atomic_read(&sbi->nr_pages[count_type]); 699 } 700 701 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 702 { 703 unsigned int pages_per_sec = sbi->segs_per_sec * 704 (1 << sbi->log_blocks_per_seg); 705 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 706 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 707 } 708 709 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 710 { 711 return sbi->total_valid_block_count; 712 } 713 714 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 715 { 716 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 717 718 /* return NAT or SIT bitmap */ 719 if (flag == NAT_BITMAP) 720 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 721 else if (flag == SIT_BITMAP) 722 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 723 724 return 0; 725 } 726 727 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 728 { 729 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 730 int offset = (flag == NAT_BITMAP) ? 731 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 732 return &ckpt->sit_nat_version_bitmap + offset; 733 } 734 735 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 736 { 737 block_t start_addr; 738 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 739 unsigned long long ckpt_version = cur_cp_version(ckpt); 740 741 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 742 743 /* 744 * odd numbered checkpoint should at cp segment 0 745 * and even segent must be at cp segment 1 746 */ 747 if (!(ckpt_version & 1)) 748 start_addr += sbi->blocks_per_seg; 749 750 return start_addr; 751 } 752 753 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 754 { 755 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 756 } 757 758 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 759 struct inode *inode) 760 { 761 block_t valid_block_count; 762 unsigned int valid_node_count; 763 764 spin_lock(&sbi->stat_lock); 765 766 valid_block_count = sbi->total_valid_block_count + 1; 767 if (unlikely(valid_block_count > sbi->user_block_count)) { 768 spin_unlock(&sbi->stat_lock); 769 return false; 770 } 771 772 valid_node_count = sbi->total_valid_node_count + 1; 773 if (unlikely(valid_node_count > sbi->total_node_count)) { 774 spin_unlock(&sbi->stat_lock); 775 return false; 776 } 777 778 if (inode) 779 inode->i_blocks++; 780 781 sbi->alloc_valid_block_count++; 782 sbi->total_valid_node_count++; 783 sbi->total_valid_block_count++; 784 spin_unlock(&sbi->stat_lock); 785 786 return true; 787 } 788 789 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 790 struct inode *inode) 791 { 792 spin_lock(&sbi->stat_lock); 793 794 f2fs_bug_on(!sbi->total_valid_block_count); 795 f2fs_bug_on(!sbi->total_valid_node_count); 796 f2fs_bug_on(!inode->i_blocks); 797 798 inode->i_blocks--; 799 sbi->total_valid_node_count--; 800 sbi->total_valid_block_count--; 801 802 spin_unlock(&sbi->stat_lock); 803 } 804 805 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 806 { 807 return sbi->total_valid_node_count; 808 } 809 810 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 811 { 812 spin_lock(&sbi->stat_lock); 813 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count); 814 sbi->total_valid_inode_count++; 815 spin_unlock(&sbi->stat_lock); 816 } 817 818 static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi) 819 { 820 spin_lock(&sbi->stat_lock); 821 f2fs_bug_on(!sbi->total_valid_inode_count); 822 sbi->total_valid_inode_count--; 823 spin_unlock(&sbi->stat_lock); 824 } 825 826 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 827 { 828 return sbi->total_valid_inode_count; 829 } 830 831 static inline void f2fs_put_page(struct page *page, int unlock) 832 { 833 if (!page) 834 return; 835 836 if (unlock) { 837 f2fs_bug_on(!PageLocked(page)); 838 unlock_page(page); 839 } 840 page_cache_release(page); 841 } 842 843 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 844 { 845 if (dn->node_page) 846 f2fs_put_page(dn->node_page, 1); 847 if (dn->inode_page && dn->node_page != dn->inode_page) 848 f2fs_put_page(dn->inode_page, 0); 849 dn->node_page = NULL; 850 dn->inode_page = NULL; 851 } 852 853 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 854 size_t size, void (*ctor)(void *)) 855 { 856 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); 857 } 858 859 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 860 gfp_t flags) 861 { 862 void *entry; 863 retry: 864 entry = kmem_cache_alloc(cachep, flags); 865 if (!entry) { 866 cond_resched(); 867 goto retry; 868 } 869 870 return entry; 871 } 872 873 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 874 875 static inline bool IS_INODE(struct page *page) 876 { 877 struct f2fs_node *p = F2FS_NODE(page); 878 return RAW_IS_INODE(p); 879 } 880 881 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 882 { 883 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 884 } 885 886 static inline block_t datablock_addr(struct page *node_page, 887 unsigned int offset) 888 { 889 struct f2fs_node *raw_node; 890 __le32 *addr_array; 891 raw_node = F2FS_NODE(node_page); 892 addr_array = blkaddr_in_node(raw_node); 893 return le32_to_cpu(addr_array[offset]); 894 } 895 896 static inline int f2fs_test_bit(unsigned int nr, char *addr) 897 { 898 int mask; 899 900 addr += (nr >> 3); 901 mask = 1 << (7 - (nr & 0x07)); 902 return mask & *addr; 903 } 904 905 static inline int f2fs_set_bit(unsigned int nr, char *addr) 906 { 907 int mask; 908 int ret; 909 910 addr += (nr >> 3); 911 mask = 1 << (7 - (nr & 0x07)); 912 ret = mask & *addr; 913 *addr |= mask; 914 return ret; 915 } 916 917 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 918 { 919 int mask; 920 int ret; 921 922 addr += (nr >> 3); 923 mask = 1 << (7 - (nr & 0x07)); 924 ret = mask & *addr; 925 *addr &= ~mask; 926 return ret; 927 } 928 929 /* used for f2fs_inode_info->flags */ 930 enum { 931 FI_NEW_INODE, /* indicate newly allocated inode */ 932 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 933 FI_INC_LINK, /* need to increment i_nlink */ 934 FI_ACL_MODE, /* indicate acl mode */ 935 FI_NO_ALLOC, /* should not allocate any blocks */ 936 FI_UPDATE_DIR, /* should update inode block for consistency */ 937 FI_DELAY_IPUT, /* used for the recovery */ 938 FI_NO_EXTENT, /* not to use the extent cache */ 939 FI_INLINE_XATTR, /* used for inline xattr */ 940 FI_INLINE_DATA, /* used for inline data*/ 941 }; 942 943 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 944 { 945 set_bit(flag, &fi->flags); 946 } 947 948 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 949 { 950 return test_bit(flag, &fi->flags); 951 } 952 953 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 954 { 955 clear_bit(flag, &fi->flags); 956 } 957 958 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 959 { 960 fi->i_acl_mode = mode; 961 set_inode_flag(fi, FI_ACL_MODE); 962 } 963 964 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 965 { 966 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 967 clear_inode_flag(fi, FI_ACL_MODE); 968 return 1; 969 } 970 return 0; 971 } 972 973 static inline void get_inline_info(struct f2fs_inode_info *fi, 974 struct f2fs_inode *ri) 975 { 976 if (ri->i_inline & F2FS_INLINE_XATTR) 977 set_inode_flag(fi, FI_INLINE_XATTR); 978 if (ri->i_inline & F2FS_INLINE_DATA) 979 set_inode_flag(fi, FI_INLINE_DATA); 980 } 981 982 static inline void set_raw_inline(struct f2fs_inode_info *fi, 983 struct f2fs_inode *ri) 984 { 985 ri->i_inline = 0; 986 987 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 988 ri->i_inline |= F2FS_INLINE_XATTR; 989 if (is_inode_flag_set(fi, FI_INLINE_DATA)) 990 ri->i_inline |= F2FS_INLINE_DATA; 991 } 992 993 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 994 { 995 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 996 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 997 return DEF_ADDRS_PER_INODE; 998 } 999 1000 static inline void *inline_xattr_addr(struct page *page) 1001 { 1002 struct f2fs_inode *ri; 1003 ri = (struct f2fs_inode *)page_address(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; 1024 ri = (struct f2fs_inode *)page_address(page); 1025 return (void *)&(ri->i_addr[1]); 1026 } 1027 1028 static inline int f2fs_readonly(struct super_block *sb) 1029 { 1030 return sb->s_flags & MS_RDONLY; 1031 } 1032 1033 static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi) 1034 { 1035 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); 1036 sbi->sb->s_flags |= MS_RDONLY; 1037 } 1038 1039 #define get_inode_mode(i) \ 1040 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \ 1041 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode)) 1042 1043 /* 1044 * file.c 1045 */ 1046 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 1047 void truncate_data_blocks(struct dnode_of_data *); 1048 int truncate_blocks(struct inode *, u64); 1049 void f2fs_truncate(struct inode *); 1050 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 1051 int f2fs_setattr(struct dentry *, struct iattr *); 1052 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 1053 int truncate_data_blocks_range(struct dnode_of_data *, int); 1054 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 1055 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 1056 1057 /* 1058 * inode.c 1059 */ 1060 void f2fs_set_inode_flags(struct inode *); 1061 struct inode *f2fs_iget(struct super_block *, unsigned long); 1062 int try_to_free_nats(struct f2fs_sb_info *, int); 1063 void update_inode(struct inode *, struct page *); 1064 void update_inode_page(struct inode *); 1065 int f2fs_write_inode(struct inode *, struct writeback_control *); 1066 void f2fs_evict_inode(struct inode *); 1067 1068 /* 1069 * namei.c 1070 */ 1071 struct dentry *f2fs_get_parent(struct dentry *child); 1072 1073 /* 1074 * dir.c 1075 */ 1076 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 1077 struct page **); 1078 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 1079 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 1080 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 1081 struct page *, struct inode *); 1082 int update_dent_inode(struct inode *, const struct qstr *); 1083 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 1084 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 1085 int f2fs_make_empty(struct inode *, struct inode *); 1086 bool f2fs_empty_dir(struct inode *); 1087 1088 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1089 { 1090 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1091 inode); 1092 } 1093 1094 /* 1095 * super.c 1096 */ 1097 int f2fs_sync_fs(struct super_block *, int); 1098 extern __printf(3, 4) 1099 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1100 1101 /* 1102 * hash.c 1103 */ 1104 f2fs_hash_t f2fs_dentry_hash(const char *, size_t); 1105 1106 /* 1107 * node.c 1108 */ 1109 struct dnode_of_data; 1110 struct node_info; 1111 1112 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1113 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1114 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1115 int truncate_inode_blocks(struct inode *, pgoff_t); 1116 int truncate_xattr_node(struct inode *, struct page *); 1117 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t); 1118 void remove_inode_page(struct inode *); 1119 struct page *new_inode_page(struct inode *, const struct qstr *); 1120 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1121 void ra_node_page(struct f2fs_sb_info *, nid_t); 1122 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1123 struct page *get_node_page_ra(struct page *, int); 1124 void sync_inode_page(struct dnode_of_data *); 1125 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1126 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1127 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1128 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1129 void recover_node_page(struct f2fs_sb_info *, struct page *, 1130 struct f2fs_summary *, struct node_info *, block_t); 1131 bool recover_xattr_data(struct inode *, struct page *, block_t); 1132 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1133 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1134 struct f2fs_summary_block *); 1135 void flush_nat_entries(struct f2fs_sb_info *); 1136 int build_node_manager(struct f2fs_sb_info *); 1137 void destroy_node_manager(struct f2fs_sb_info *); 1138 int __init create_node_manager_caches(void); 1139 void destroy_node_manager_caches(void); 1140 1141 /* 1142 * segment.c 1143 */ 1144 void f2fs_balance_fs(struct f2fs_sb_info *); 1145 void f2fs_balance_fs_bg(struct f2fs_sb_info *); 1146 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1147 void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); 1148 void clear_prefree_segments(struct f2fs_sb_info *); 1149 int npages_for_summary_flush(struct f2fs_sb_info *); 1150 void allocate_new_segments(struct f2fs_sb_info *); 1151 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1152 void write_meta_page(struct f2fs_sb_info *, struct page *); 1153 void write_node_page(struct f2fs_sb_info *, struct page *, 1154 struct f2fs_io_info *, unsigned int, block_t, block_t *); 1155 void write_data_page(struct page *, struct dnode_of_data *, block_t *, 1156 struct f2fs_io_info *); 1157 void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *); 1158 void recover_data_page(struct f2fs_sb_info *, struct page *, 1159 struct f2fs_summary *, block_t, block_t); 1160 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 1161 struct f2fs_summary *, block_t, block_t); 1162 void allocate_data_block(struct f2fs_sb_info *, struct page *, 1163 block_t, block_t *, struct f2fs_summary *, int); 1164 void f2fs_wait_on_page_writeback(struct page *, enum page_type); 1165 void write_data_summaries(struct f2fs_sb_info *, block_t); 1166 void write_node_summaries(struct f2fs_sb_info *, block_t); 1167 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1168 int, unsigned int, int); 1169 void flush_sit_entries(struct f2fs_sb_info *); 1170 int build_segment_manager(struct f2fs_sb_info *); 1171 void destroy_segment_manager(struct f2fs_sb_info *); 1172 int __init create_segment_manager_caches(void); 1173 void destroy_segment_manager_caches(void); 1174 1175 /* 1176 * checkpoint.c 1177 */ 1178 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1179 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1180 int ra_meta_pages(struct f2fs_sb_info *, int, int, int); 1181 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1182 int acquire_orphan_inode(struct f2fs_sb_info *); 1183 void release_orphan_inode(struct f2fs_sb_info *); 1184 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1185 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1186 void recover_orphan_inodes(struct f2fs_sb_info *); 1187 int get_valid_checkpoint(struct f2fs_sb_info *); 1188 void set_dirty_dir_page(struct inode *, struct page *); 1189 void add_dirty_dir_inode(struct inode *); 1190 void remove_dirty_dir_inode(struct inode *); 1191 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t); 1192 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1193 void write_checkpoint(struct f2fs_sb_info *, bool); 1194 void init_orphan_info(struct f2fs_sb_info *); 1195 int __init create_checkpoint_caches(void); 1196 void destroy_checkpoint_caches(void); 1197 1198 /* 1199 * data.c 1200 */ 1201 void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int); 1202 int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int); 1203 void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t, 1204 struct f2fs_io_info *); 1205 int reserve_new_block(struct dnode_of_data *); 1206 int f2fs_reserve_block(struct dnode_of_data *, pgoff_t); 1207 void update_extent_cache(block_t, struct dnode_of_data *); 1208 struct page *find_data_page(struct inode *, pgoff_t, bool); 1209 struct page *get_lock_data_page(struct inode *, pgoff_t); 1210 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1211 int do_write_data_page(struct page *, struct f2fs_io_info *); 1212 1213 /* 1214 * gc.c 1215 */ 1216 int start_gc_thread(struct f2fs_sb_info *); 1217 void stop_gc_thread(struct f2fs_sb_info *); 1218 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1219 int f2fs_gc(struct f2fs_sb_info *); 1220 void build_gc_manager(struct f2fs_sb_info *); 1221 int __init create_gc_caches(void); 1222 void destroy_gc_caches(void); 1223 1224 /* 1225 * recovery.c 1226 */ 1227 int recover_fsync_data(struct f2fs_sb_info *); 1228 bool space_for_roll_forward(struct f2fs_sb_info *); 1229 1230 /* 1231 * debug.c 1232 */ 1233 #ifdef CONFIG_F2FS_STAT_FS 1234 struct f2fs_stat_info { 1235 struct list_head stat_list; 1236 struct f2fs_sb_info *sbi; 1237 struct mutex stat_lock; 1238 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1239 int main_area_segs, main_area_sections, main_area_zones; 1240 int hit_ext, total_ext; 1241 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1242 int nats, sits, fnids; 1243 int total_count, utilization; 1244 int bg_gc, inline_inode; 1245 unsigned int valid_count, valid_node_count, valid_inode_count; 1246 unsigned int bimodal, avg_vblocks; 1247 int util_free, util_valid, util_invalid; 1248 int rsvd_segs, overp_segs; 1249 int dirty_count, node_pages, meta_pages; 1250 int prefree_count, call_count, cp_count; 1251 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1252 int tot_blks, data_blks, node_blks; 1253 int curseg[NR_CURSEG_TYPE]; 1254 int cursec[NR_CURSEG_TYPE]; 1255 int curzone[NR_CURSEG_TYPE]; 1256 1257 unsigned int segment_count[2]; 1258 unsigned int block_count[2]; 1259 unsigned base_mem, cache_mem; 1260 }; 1261 1262 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1263 { 1264 return (struct f2fs_stat_info *)sbi->stat_info; 1265 } 1266 1267 #define stat_inc_cp_count(si) ((si)->cp_count++) 1268 #define stat_inc_call_count(si) ((si)->call_count++) 1269 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) 1270 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) 1271 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) 1272 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) 1273 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) 1274 #define stat_inc_inline_inode(inode) \ 1275 do { \ 1276 if (f2fs_has_inline_data(inode)) \ 1277 ((F2FS_SB(inode->i_sb))->inline_inode++); \ 1278 } while (0) 1279 #define stat_dec_inline_inode(inode) \ 1280 do { \ 1281 if (f2fs_has_inline_data(inode)) \ 1282 ((F2FS_SB(inode->i_sb))->inline_inode--); \ 1283 } while (0) 1284 1285 #define stat_inc_seg_type(sbi, curseg) \ 1286 ((sbi)->segment_count[(curseg)->alloc_type]++) 1287 #define stat_inc_block_count(sbi, curseg) \ 1288 ((sbi)->block_count[(curseg)->alloc_type]++) 1289 1290 #define stat_inc_seg_count(sbi, type) \ 1291 do { \ 1292 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1293 (si)->tot_segs++; \ 1294 if (type == SUM_TYPE_DATA) \ 1295 si->data_segs++; \ 1296 else \ 1297 si->node_segs++; \ 1298 } while (0) 1299 1300 #define stat_inc_tot_blk_count(si, blks) \ 1301 (si->tot_blks += (blks)) 1302 1303 #define stat_inc_data_blk_count(sbi, blks) \ 1304 do { \ 1305 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1306 stat_inc_tot_blk_count(si, blks); \ 1307 si->data_blks += (blks); \ 1308 } while (0) 1309 1310 #define stat_inc_node_blk_count(sbi, blks) \ 1311 do { \ 1312 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1313 stat_inc_tot_blk_count(si, blks); \ 1314 si->node_blks += (blks); \ 1315 } while (0) 1316 1317 int f2fs_build_stats(struct f2fs_sb_info *); 1318 void f2fs_destroy_stats(struct f2fs_sb_info *); 1319 void __init f2fs_create_root_stats(void); 1320 void f2fs_destroy_root_stats(void); 1321 #else 1322 #define stat_inc_cp_count(si) 1323 #define stat_inc_call_count(si) 1324 #define stat_inc_bggc_count(si) 1325 #define stat_inc_dirty_dir(sbi) 1326 #define stat_dec_dirty_dir(sbi) 1327 #define stat_inc_total_hit(sb) 1328 #define stat_inc_read_hit(sb) 1329 #define stat_inc_inline_inode(inode) 1330 #define stat_dec_inline_inode(inode) 1331 #define stat_inc_seg_type(sbi, curseg) 1332 #define stat_inc_block_count(sbi, curseg) 1333 #define stat_inc_seg_count(si, type) 1334 #define stat_inc_tot_blk_count(si, blks) 1335 #define stat_inc_data_blk_count(si, blks) 1336 #define stat_inc_node_blk_count(sbi, blks) 1337 1338 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1339 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1340 static inline void __init f2fs_create_root_stats(void) { } 1341 static inline void f2fs_destroy_root_stats(void) { } 1342 #endif 1343 1344 extern const struct file_operations f2fs_dir_operations; 1345 extern const struct file_operations f2fs_file_operations; 1346 extern const struct inode_operations f2fs_file_inode_operations; 1347 extern const struct address_space_operations f2fs_dblock_aops; 1348 extern const struct address_space_operations f2fs_node_aops; 1349 extern const struct address_space_operations f2fs_meta_aops; 1350 extern const struct inode_operations f2fs_dir_inode_operations; 1351 extern const struct inode_operations f2fs_symlink_inode_operations; 1352 extern const struct inode_operations f2fs_special_inode_operations; 1353 1354 /* 1355 * inline.c 1356 */ 1357 bool f2fs_may_inline(struct inode *); 1358 int f2fs_read_inline_data(struct inode *, struct page *); 1359 int f2fs_convert_inline_data(struct inode *, pgoff_t); 1360 int f2fs_write_inline_data(struct inode *, struct page *, unsigned int); 1361 int recover_inline_data(struct inode *, struct page *); 1362 #endif 1363