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 21 /* 22 * For mount options 23 */ 24 #define F2FS_MOUNT_BG_GC 0x00000001 25 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 26 #define F2FS_MOUNT_DISCARD 0x00000004 27 #define F2FS_MOUNT_NOHEAP 0x00000008 28 #define F2FS_MOUNT_XATTR_USER 0x00000010 29 #define F2FS_MOUNT_POSIX_ACL 0x00000020 30 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 31 32 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 33 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 34 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 35 36 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 37 typecheck(unsigned long long, b) && \ 38 ((long long)((a) - (b)) > 0)) 39 40 typedef u64 block_t; 41 typedef u32 nid_t; 42 43 struct f2fs_mount_info { 44 unsigned int opt; 45 }; 46 47 static inline __u32 f2fs_crc32(void *buff, size_t len) 48 { 49 return crc32_le(F2FS_SUPER_MAGIC, buff, len); 50 } 51 52 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size) 53 { 54 return f2fs_crc32(buff, buff_size) == blk_crc; 55 } 56 57 /* 58 * For checkpoint manager 59 */ 60 enum { 61 NAT_BITMAP, 62 SIT_BITMAP 63 }; 64 65 /* for the list of orphan inodes */ 66 struct orphan_inode_entry { 67 struct list_head list; /* list head */ 68 nid_t ino; /* inode number */ 69 }; 70 71 /* for the list of directory inodes */ 72 struct dir_inode_entry { 73 struct list_head list; /* list head */ 74 struct inode *inode; /* vfs inode pointer */ 75 }; 76 77 /* for the list of fsync inodes, used only during recovery */ 78 struct fsync_inode_entry { 79 struct list_head list; /* list head */ 80 struct inode *inode; /* vfs inode pointer */ 81 block_t blkaddr; /* block address locating the last inode */ 82 }; 83 84 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 85 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 86 87 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 88 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 89 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 90 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 91 92 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 93 { 94 int before = nats_in_cursum(rs); 95 rs->n_nats = cpu_to_le16(before + i); 96 return before; 97 } 98 99 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 100 { 101 int before = sits_in_cursum(rs); 102 rs->n_sits = cpu_to_le16(before + i); 103 return before; 104 } 105 106 /* 107 * For INODE and NODE manager 108 */ 109 #define XATTR_NODE_OFFSET (-1) /* 110 * store xattrs to one node block per 111 * file keeping -1 as its node offset to 112 * distinguish from index node blocks. 113 */ 114 #define RDONLY_NODE 1 /* 115 * specify a read-only mode when getting 116 * a node block. 0 is read-write mode. 117 * used by get_dnode_of_data(). 118 */ 119 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 120 121 /* for in-memory extent cache entry */ 122 struct extent_info { 123 rwlock_t ext_lock; /* rwlock for consistency */ 124 unsigned int fofs; /* start offset in a file */ 125 u32 blk_addr; /* start block address of the extent */ 126 unsigned int len; /* lenth of the extent */ 127 }; 128 129 /* 130 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 131 */ 132 #define FADVISE_COLD_BIT 0x01 133 134 struct f2fs_inode_info { 135 struct inode vfs_inode; /* serve a vfs inode */ 136 unsigned long i_flags; /* keep an inode flags for ioctl */ 137 unsigned char i_advise; /* use to give file attribute hints */ 138 unsigned int i_current_depth; /* use only in directory structure */ 139 umode_t i_acl_mode; /* keep file acl mode temporarily */ 140 141 /* Use below internally in f2fs*/ 142 unsigned long flags; /* use to pass per-file flags */ 143 unsigned long long data_version;/* lastes version of data for fsync */ 144 atomic_t dirty_dents; /* # of dirty dentry pages */ 145 f2fs_hash_t chash; /* hash value of given file name */ 146 unsigned int clevel; /* maximum level of given file name */ 147 nid_t i_xattr_nid; /* node id that contains xattrs */ 148 struct extent_info ext; /* in-memory extent cache entry */ 149 }; 150 151 static inline void get_extent_info(struct extent_info *ext, 152 struct f2fs_extent i_ext) 153 { 154 write_lock(&ext->ext_lock); 155 ext->fofs = le32_to_cpu(i_ext.fofs); 156 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 157 ext->len = le32_to_cpu(i_ext.len); 158 write_unlock(&ext->ext_lock); 159 } 160 161 static inline void set_raw_extent(struct extent_info *ext, 162 struct f2fs_extent *i_ext) 163 { 164 read_lock(&ext->ext_lock); 165 i_ext->fofs = cpu_to_le32(ext->fofs); 166 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 167 i_ext->len = cpu_to_le32(ext->len); 168 read_unlock(&ext->ext_lock); 169 } 170 171 struct f2fs_nm_info { 172 block_t nat_blkaddr; /* base disk address of NAT */ 173 nid_t max_nid; /* maximum possible node ids */ 174 nid_t init_scan_nid; /* the first nid to be scanned */ 175 nid_t next_scan_nid; /* the next nid to be scanned */ 176 177 /* NAT cache management */ 178 struct radix_tree_root nat_root;/* root of the nat entry cache */ 179 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 180 unsigned int nat_cnt; /* the # of cached nat entries */ 181 struct list_head nat_entries; /* cached nat entry list (clean) */ 182 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 183 184 /* free node ids management */ 185 struct list_head free_nid_list; /* a list for free nids */ 186 spinlock_t free_nid_list_lock; /* protect free nid list */ 187 unsigned int fcnt; /* the number of free node id */ 188 struct mutex build_lock; /* lock for build free nids */ 189 190 /* for checkpoint */ 191 char *nat_bitmap; /* NAT bitmap pointer */ 192 int bitmap_size; /* bitmap size */ 193 }; 194 195 /* 196 * this structure is used as one of function parameters. 197 * all the information are dedicated to a given direct node block determined 198 * by the data offset in a file. 199 */ 200 struct dnode_of_data { 201 struct inode *inode; /* vfs inode pointer */ 202 struct page *inode_page; /* its inode page, NULL is possible */ 203 struct page *node_page; /* cached direct node page */ 204 nid_t nid; /* node id of the direct node block */ 205 unsigned int ofs_in_node; /* data offset in the node page */ 206 bool inode_page_locked; /* inode page is locked or not */ 207 block_t data_blkaddr; /* block address of the node block */ 208 }; 209 210 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 211 struct page *ipage, struct page *npage, nid_t nid) 212 { 213 dn->inode = inode; 214 dn->inode_page = ipage; 215 dn->node_page = npage; 216 dn->nid = nid; 217 dn->inode_page_locked = 0; 218 } 219 220 /* 221 * For SIT manager 222 * 223 * By default, there are 6 active log areas across the whole main area. 224 * When considering hot and cold data separation to reduce cleaning overhead, 225 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 226 * respectively. 227 * In the current design, you should not change the numbers intentionally. 228 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 229 * logs individually according to the underlying devices. (default: 6) 230 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 231 * data and 8 for node logs. 232 */ 233 #define NR_CURSEG_DATA_TYPE (3) 234 #define NR_CURSEG_NODE_TYPE (3) 235 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 236 237 enum { 238 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 239 CURSEG_WARM_DATA, /* data blocks */ 240 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 241 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 242 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 243 CURSEG_COLD_NODE, /* indirect node blocks */ 244 NO_CHECK_TYPE 245 }; 246 247 struct f2fs_sm_info { 248 struct sit_info *sit_info; /* whole segment information */ 249 struct free_segmap_info *free_info; /* free segment information */ 250 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 251 struct curseg_info *curseg_array; /* active segment information */ 252 253 struct list_head wblist_head; /* list of under-writeback pages */ 254 spinlock_t wblist_lock; /* lock for checkpoint */ 255 256 block_t seg0_blkaddr; /* block address of 0'th segment */ 257 block_t main_blkaddr; /* start block address of main area */ 258 block_t ssa_blkaddr; /* start block address of SSA area */ 259 260 unsigned int segment_count; /* total # of segments */ 261 unsigned int main_segments; /* # of segments in main area */ 262 unsigned int reserved_segments; /* # of reserved segments */ 263 unsigned int ovp_segments; /* # of overprovision segments */ 264 }; 265 266 /* 267 * For directory operation 268 */ 269 #define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1) 270 #define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2) 271 #define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3) 272 #define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4) 273 #define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5) 274 275 /* 276 * For superblock 277 */ 278 /* 279 * COUNT_TYPE for monitoring 280 * 281 * f2fs monitors the number of several block types such as on-writeback, 282 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 283 */ 284 enum count_type { 285 F2FS_WRITEBACK, 286 F2FS_DIRTY_DENTS, 287 F2FS_DIRTY_NODES, 288 F2FS_DIRTY_META, 289 NR_COUNT_TYPE, 290 }; 291 292 /* 293 * FS_LOCK nesting subclasses for the lock validator: 294 * 295 * The locking order between these classes is 296 * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW 297 * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC 298 */ 299 enum lock_type { 300 RENAME, /* for renaming operations */ 301 DENTRY_OPS, /* for directory operations */ 302 DATA_WRITE, /* for data write */ 303 DATA_NEW, /* for data allocation */ 304 DATA_TRUNC, /* for data truncate */ 305 NODE_NEW, /* for node allocation */ 306 NODE_TRUNC, /* for node truncate */ 307 NODE_WRITE, /* for node write */ 308 NR_LOCK_TYPE, 309 }; 310 311 /* 312 * The below are the page types of bios used in submti_bio(). 313 * The available types are: 314 * DATA User data pages. It operates as async mode. 315 * NODE Node pages. It operates as async mode. 316 * META FS metadata pages such as SIT, NAT, CP. 317 * NR_PAGE_TYPE The number of page types. 318 * META_FLUSH Make sure the previous pages are written 319 * with waiting the bio's completion 320 * ... Only can be used with META. 321 */ 322 enum page_type { 323 DATA, 324 NODE, 325 META, 326 NR_PAGE_TYPE, 327 META_FLUSH, 328 }; 329 330 struct f2fs_sb_info { 331 struct super_block *sb; /* pointer to VFS super block */ 332 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 333 struct f2fs_super_block *raw_super; /* raw super block pointer */ 334 int s_dirty; /* dirty flag for checkpoint */ 335 336 /* for node-related operations */ 337 struct f2fs_nm_info *nm_info; /* node manager */ 338 struct inode *node_inode; /* cache node blocks */ 339 340 /* for segment-related operations */ 341 struct f2fs_sm_info *sm_info; /* segment manager */ 342 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */ 343 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */ 344 struct rw_semaphore bio_sem; /* IO semaphore */ 345 346 /* for checkpoint */ 347 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 348 struct inode *meta_inode; /* cache meta blocks */ 349 struct mutex cp_mutex; /* for checkpoint procedure */ 350 struct mutex fs_lock[NR_LOCK_TYPE]; /* for blocking FS operations */ 351 struct mutex write_inode; /* mutex for write inode */ 352 struct mutex writepages; /* mutex for writepages() */ 353 int por_doing; /* recovery is doing or not */ 354 355 /* for orphan inode management */ 356 struct list_head orphan_inode_list; /* orphan inode list */ 357 struct mutex orphan_inode_mutex; /* for orphan inode list */ 358 unsigned int n_orphans; /* # of orphan inodes */ 359 360 /* for directory inode management */ 361 struct list_head dir_inode_list; /* dir inode list */ 362 spinlock_t dir_inode_lock; /* for dir inode list lock */ 363 unsigned int n_dirty_dirs; /* # of dir inodes */ 364 365 /* basic file system units */ 366 unsigned int log_sectors_per_block; /* log2 sectors per block */ 367 unsigned int log_blocksize; /* log2 block size */ 368 unsigned int blocksize; /* block size */ 369 unsigned int root_ino_num; /* root inode number*/ 370 unsigned int node_ino_num; /* node inode number*/ 371 unsigned int meta_ino_num; /* meta inode number*/ 372 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 373 unsigned int blocks_per_seg; /* blocks per segment */ 374 unsigned int segs_per_sec; /* segments per section */ 375 unsigned int secs_per_zone; /* sections per zone */ 376 unsigned int total_sections; /* total section count */ 377 unsigned int total_node_count; /* total node block count */ 378 unsigned int total_valid_node_count; /* valid node block count */ 379 unsigned int total_valid_inode_count; /* valid inode count */ 380 int active_logs; /* # of active logs */ 381 382 block_t user_block_count; /* # of user blocks */ 383 block_t total_valid_block_count; /* # of valid blocks */ 384 block_t alloc_valid_block_count; /* # of allocated blocks */ 385 block_t last_valid_block_count; /* for recovery */ 386 u32 s_next_generation; /* for NFS support */ 387 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 388 389 struct f2fs_mount_info mount_opt; /* mount options */ 390 391 /* for cleaning operations */ 392 struct mutex gc_mutex; /* mutex for GC */ 393 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 394 395 /* 396 * for stat information. 397 * one is for the LFS mode, and the other is for the SSR mode. 398 */ 399 struct f2fs_stat_info *stat_info; /* FS status information */ 400 unsigned int segment_count[2]; /* # of allocated segments */ 401 unsigned int block_count[2]; /* # of allocated blocks */ 402 unsigned int last_victim[2]; /* last victim segment # */ 403 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 404 int bg_gc; /* background gc calls */ 405 spinlock_t stat_lock; /* lock for stat operations */ 406 }; 407 408 /* 409 * Inline functions 410 */ 411 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 412 { 413 return container_of(inode, struct f2fs_inode_info, vfs_inode); 414 } 415 416 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 417 { 418 return sb->s_fs_info; 419 } 420 421 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 422 { 423 return (struct f2fs_super_block *)(sbi->raw_super); 424 } 425 426 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 427 { 428 return (struct f2fs_checkpoint *)(sbi->ckpt); 429 } 430 431 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 432 { 433 return (struct f2fs_nm_info *)(sbi->nm_info); 434 } 435 436 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 437 { 438 return (struct f2fs_sm_info *)(sbi->sm_info); 439 } 440 441 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 442 { 443 return (struct sit_info *)(SM_I(sbi)->sit_info); 444 } 445 446 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 447 { 448 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 449 } 450 451 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 452 { 453 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 454 } 455 456 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 457 { 458 sbi->s_dirty = 1; 459 } 460 461 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 462 { 463 sbi->s_dirty = 0; 464 } 465 466 static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t) 467 { 468 mutex_lock_nested(&sbi->fs_lock[t], t); 469 } 470 471 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t) 472 { 473 mutex_unlock(&sbi->fs_lock[t]); 474 } 475 476 /* 477 * Check whether the given nid is within node id range. 478 */ 479 static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 480 { 481 BUG_ON((nid >= NM_I(sbi)->max_nid)); 482 } 483 484 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 485 486 /* 487 * Check whether the inode has blocks or not 488 */ 489 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 490 { 491 if (F2FS_I(inode)->i_xattr_nid) 492 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1); 493 else 494 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS); 495 } 496 497 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 498 struct inode *inode, blkcnt_t count) 499 { 500 block_t valid_block_count; 501 502 spin_lock(&sbi->stat_lock); 503 valid_block_count = 504 sbi->total_valid_block_count + (block_t)count; 505 if (valid_block_count > sbi->user_block_count) { 506 spin_unlock(&sbi->stat_lock); 507 return false; 508 } 509 inode->i_blocks += count; 510 sbi->total_valid_block_count = valid_block_count; 511 sbi->alloc_valid_block_count += (block_t)count; 512 spin_unlock(&sbi->stat_lock); 513 return true; 514 } 515 516 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi, 517 struct inode *inode, 518 blkcnt_t count) 519 { 520 spin_lock(&sbi->stat_lock); 521 BUG_ON(sbi->total_valid_block_count < (block_t) count); 522 BUG_ON(inode->i_blocks < count); 523 inode->i_blocks -= count; 524 sbi->total_valid_block_count -= (block_t)count; 525 spin_unlock(&sbi->stat_lock); 526 return 0; 527 } 528 529 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 530 { 531 atomic_inc(&sbi->nr_pages[count_type]); 532 F2FS_SET_SB_DIRT(sbi); 533 } 534 535 static inline void inode_inc_dirty_dents(struct inode *inode) 536 { 537 atomic_inc(&F2FS_I(inode)->dirty_dents); 538 } 539 540 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 541 { 542 atomic_dec(&sbi->nr_pages[count_type]); 543 } 544 545 static inline void inode_dec_dirty_dents(struct inode *inode) 546 { 547 atomic_dec(&F2FS_I(inode)->dirty_dents); 548 } 549 550 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 551 { 552 return atomic_read(&sbi->nr_pages[count_type]); 553 } 554 555 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 556 { 557 block_t ret; 558 spin_lock(&sbi->stat_lock); 559 ret = sbi->total_valid_block_count; 560 spin_unlock(&sbi->stat_lock); 561 return ret; 562 } 563 564 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 565 { 566 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 567 568 /* return NAT or SIT bitmap */ 569 if (flag == NAT_BITMAP) 570 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 571 else if (flag == SIT_BITMAP) 572 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 573 574 return 0; 575 } 576 577 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 578 { 579 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 580 int offset = (flag == NAT_BITMAP) ? ckpt->sit_ver_bitmap_bytesize : 0; 581 return &ckpt->sit_nat_version_bitmap + offset; 582 } 583 584 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 585 { 586 block_t start_addr; 587 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 588 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver); 589 590 start_addr = le64_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 591 592 /* 593 * odd numbered checkpoint should at cp segment 0 594 * and even segent must be at cp segment 1 595 */ 596 if (!(ckpt_version & 1)) 597 start_addr += sbi->blocks_per_seg; 598 599 return start_addr; 600 } 601 602 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 603 { 604 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 605 } 606 607 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 608 struct inode *inode, 609 unsigned int count) 610 { 611 block_t valid_block_count; 612 unsigned int valid_node_count; 613 614 spin_lock(&sbi->stat_lock); 615 616 valid_block_count = sbi->total_valid_block_count + (block_t)count; 617 sbi->alloc_valid_block_count += (block_t)count; 618 valid_node_count = sbi->total_valid_node_count + count; 619 620 if (valid_block_count > sbi->user_block_count) { 621 spin_unlock(&sbi->stat_lock); 622 return false; 623 } 624 625 if (valid_node_count > sbi->total_node_count) { 626 spin_unlock(&sbi->stat_lock); 627 return false; 628 } 629 630 if (inode) 631 inode->i_blocks += count; 632 sbi->total_valid_node_count = valid_node_count; 633 sbi->total_valid_block_count = valid_block_count; 634 spin_unlock(&sbi->stat_lock); 635 636 return true; 637 } 638 639 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 640 struct inode *inode, 641 unsigned int count) 642 { 643 spin_lock(&sbi->stat_lock); 644 645 BUG_ON(sbi->total_valid_block_count < count); 646 BUG_ON(sbi->total_valid_node_count < count); 647 BUG_ON(inode->i_blocks < count); 648 649 inode->i_blocks -= count; 650 sbi->total_valid_node_count -= count; 651 sbi->total_valid_block_count -= (block_t)count; 652 653 spin_unlock(&sbi->stat_lock); 654 } 655 656 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 657 { 658 unsigned int ret; 659 spin_lock(&sbi->stat_lock); 660 ret = sbi->total_valid_node_count; 661 spin_unlock(&sbi->stat_lock); 662 return ret; 663 } 664 665 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 666 { 667 spin_lock(&sbi->stat_lock); 668 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count); 669 sbi->total_valid_inode_count++; 670 spin_unlock(&sbi->stat_lock); 671 } 672 673 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi) 674 { 675 spin_lock(&sbi->stat_lock); 676 BUG_ON(!sbi->total_valid_inode_count); 677 sbi->total_valid_inode_count--; 678 spin_unlock(&sbi->stat_lock); 679 return 0; 680 } 681 682 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 683 { 684 unsigned int ret; 685 spin_lock(&sbi->stat_lock); 686 ret = sbi->total_valid_inode_count; 687 spin_unlock(&sbi->stat_lock); 688 return ret; 689 } 690 691 static inline void f2fs_put_page(struct page *page, int unlock) 692 { 693 if (!page || IS_ERR(page)) 694 return; 695 696 if (unlock) { 697 BUG_ON(!PageLocked(page)); 698 unlock_page(page); 699 } 700 page_cache_release(page); 701 } 702 703 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 704 { 705 if (dn->node_page) 706 f2fs_put_page(dn->node_page, 1); 707 if (dn->inode_page && dn->node_page != dn->inode_page) 708 f2fs_put_page(dn->inode_page, 0); 709 dn->node_page = NULL; 710 dn->inode_page = NULL; 711 } 712 713 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 714 size_t size, void (*ctor)(void *)) 715 { 716 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); 717 } 718 719 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 720 721 static inline bool IS_INODE(struct page *page) 722 { 723 struct f2fs_node *p = (struct f2fs_node *)page_address(page); 724 return RAW_IS_INODE(p); 725 } 726 727 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 728 { 729 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 730 } 731 732 static inline block_t datablock_addr(struct page *node_page, 733 unsigned int offset) 734 { 735 struct f2fs_node *raw_node; 736 __le32 *addr_array; 737 raw_node = (struct f2fs_node *)page_address(node_page); 738 addr_array = blkaddr_in_node(raw_node); 739 return le32_to_cpu(addr_array[offset]); 740 } 741 742 static inline int f2fs_test_bit(unsigned int nr, char *addr) 743 { 744 int mask; 745 746 addr += (nr >> 3); 747 mask = 1 << (7 - (nr & 0x07)); 748 return mask & *addr; 749 } 750 751 static inline int f2fs_set_bit(unsigned int nr, char *addr) 752 { 753 int mask; 754 int ret; 755 756 addr += (nr >> 3); 757 mask = 1 << (7 - (nr & 0x07)); 758 ret = mask & *addr; 759 *addr |= mask; 760 return ret; 761 } 762 763 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 764 { 765 int mask; 766 int ret; 767 768 addr += (nr >> 3); 769 mask = 1 << (7 - (nr & 0x07)); 770 ret = mask & *addr; 771 *addr &= ~mask; 772 return ret; 773 } 774 775 /* used for f2fs_inode_info->flags */ 776 enum { 777 FI_NEW_INODE, /* indicate newly allocated inode */ 778 FI_NEED_CP, /* need to do checkpoint during fsync */ 779 FI_INC_LINK, /* need to increment i_nlink */ 780 FI_ACL_MODE, /* indicate acl mode */ 781 FI_NO_ALLOC, /* should not allocate any blocks */ 782 }; 783 784 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 785 { 786 set_bit(flag, &fi->flags); 787 } 788 789 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 790 { 791 return test_bit(flag, &fi->flags); 792 } 793 794 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 795 { 796 clear_bit(flag, &fi->flags); 797 } 798 799 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 800 { 801 fi->i_acl_mode = mode; 802 set_inode_flag(fi, FI_ACL_MODE); 803 } 804 805 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 806 { 807 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 808 clear_inode_flag(fi, FI_ACL_MODE); 809 return 1; 810 } 811 return 0; 812 } 813 814 /* 815 * file.c 816 */ 817 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 818 void truncate_data_blocks(struct dnode_of_data *); 819 void f2fs_truncate(struct inode *); 820 int f2fs_setattr(struct dentry *, struct iattr *); 821 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 822 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 823 824 /* 825 * inode.c 826 */ 827 void f2fs_set_inode_flags(struct inode *); 828 struct inode *f2fs_iget_nowait(struct super_block *, unsigned long); 829 struct inode *f2fs_iget(struct super_block *, unsigned long); 830 void update_inode(struct inode *, struct page *); 831 int f2fs_write_inode(struct inode *, struct writeback_control *); 832 void f2fs_evict_inode(struct inode *); 833 834 /* 835 * namei.c 836 */ 837 struct dentry *f2fs_get_parent(struct dentry *child); 838 839 /* 840 * dir.c 841 */ 842 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 843 struct page **); 844 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 845 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 846 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 847 struct page *, struct inode *); 848 void init_dent_inode(struct dentry *, struct page *); 849 int f2fs_add_link(struct dentry *, struct inode *); 850 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 851 int f2fs_make_empty(struct inode *, struct inode *); 852 bool f2fs_empty_dir(struct inode *); 853 854 /* 855 * super.c 856 */ 857 int f2fs_sync_fs(struct super_block *, int); 858 859 /* 860 * hash.c 861 */ 862 f2fs_hash_t f2fs_dentry_hash(const char *, int); 863 864 /* 865 * node.c 866 */ 867 struct dnode_of_data; 868 struct node_info; 869 870 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 871 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 872 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 873 int truncate_inode_blocks(struct inode *, pgoff_t); 874 int remove_inode_page(struct inode *); 875 int new_inode_page(struct inode *, struct dentry *); 876 struct page *new_node_page(struct dnode_of_data *, unsigned int); 877 void ra_node_page(struct f2fs_sb_info *, nid_t); 878 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 879 struct page *get_node_page_ra(struct page *, int); 880 void sync_inode_page(struct dnode_of_data *); 881 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 882 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 883 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 884 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 885 void recover_node_page(struct f2fs_sb_info *, struct page *, 886 struct f2fs_summary *, struct node_info *, block_t); 887 int recover_inode_page(struct f2fs_sb_info *, struct page *); 888 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 889 struct f2fs_summary_block *); 890 void flush_nat_entries(struct f2fs_sb_info *); 891 int build_node_manager(struct f2fs_sb_info *); 892 void destroy_node_manager(struct f2fs_sb_info *); 893 int create_node_manager_caches(void); 894 void destroy_node_manager_caches(void); 895 896 /* 897 * segment.c 898 */ 899 void f2fs_balance_fs(struct f2fs_sb_info *); 900 void invalidate_blocks(struct f2fs_sb_info *, block_t); 901 void locate_dirty_segment(struct f2fs_sb_info *, unsigned int); 902 void clear_prefree_segments(struct f2fs_sb_info *); 903 int npages_for_summary_flush(struct f2fs_sb_info *); 904 void allocate_new_segments(struct f2fs_sb_info *); 905 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 906 struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t); 907 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync); 908 int write_meta_page(struct f2fs_sb_info *, struct page *, 909 struct writeback_control *); 910 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, 911 block_t, block_t *); 912 void write_data_page(struct inode *, struct page *, struct dnode_of_data*, 913 block_t, block_t *); 914 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t); 915 void recover_data_page(struct f2fs_sb_info *, struct page *, 916 struct f2fs_summary *, block_t, block_t); 917 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 918 struct f2fs_summary *, block_t, block_t); 919 void write_data_summaries(struct f2fs_sb_info *, block_t); 920 void write_node_summaries(struct f2fs_sb_info *, block_t); 921 int lookup_journal_in_cursum(struct f2fs_summary_block *, 922 int, unsigned int, int); 923 void flush_sit_entries(struct f2fs_sb_info *); 924 int build_segment_manager(struct f2fs_sb_info *); 925 void reset_victim_segmap(struct f2fs_sb_info *); 926 void destroy_segment_manager(struct f2fs_sb_info *); 927 928 /* 929 * checkpoint.c 930 */ 931 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 932 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 933 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 934 int check_orphan_space(struct f2fs_sb_info *); 935 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 936 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 937 int recover_orphan_inodes(struct f2fs_sb_info *); 938 int get_valid_checkpoint(struct f2fs_sb_info *); 939 void set_dirty_dir_page(struct inode *, struct page *); 940 void remove_dirty_dir_inode(struct inode *); 941 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 942 void block_operations(struct f2fs_sb_info *); 943 void write_checkpoint(struct f2fs_sb_info *, bool, bool); 944 void init_orphan_info(struct f2fs_sb_info *); 945 int create_checkpoint_caches(void); 946 void destroy_checkpoint_caches(void); 947 948 /* 949 * data.c 950 */ 951 int reserve_new_block(struct dnode_of_data *); 952 void update_extent_cache(block_t, struct dnode_of_data *); 953 struct page *find_data_page(struct inode *, pgoff_t); 954 struct page *get_lock_data_page(struct inode *, pgoff_t); 955 struct page *get_new_data_page(struct inode *, pgoff_t, bool); 956 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int); 957 int do_write_data_page(struct page *); 958 959 /* 960 * gc.c 961 */ 962 int start_gc_thread(struct f2fs_sb_info *); 963 void stop_gc_thread(struct f2fs_sb_info *); 964 block_t start_bidx_of_node(unsigned int); 965 int f2fs_gc(struct f2fs_sb_info *, int); 966 void build_gc_manager(struct f2fs_sb_info *); 967 int create_gc_caches(void); 968 void destroy_gc_caches(void); 969 970 /* 971 * recovery.c 972 */ 973 void recover_fsync_data(struct f2fs_sb_info *); 974 bool space_for_roll_forward(struct f2fs_sb_info *); 975 976 /* 977 * debug.c 978 */ 979 #ifdef CONFIG_F2FS_STAT_FS 980 struct f2fs_stat_info { 981 struct list_head stat_list; 982 struct f2fs_sb_info *sbi; 983 struct mutex stat_lock; 984 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 985 int main_area_segs, main_area_sections, main_area_zones; 986 int hit_ext, total_ext; 987 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 988 int nats, sits, fnids; 989 int total_count, utilization; 990 int bg_gc; 991 unsigned int valid_count, valid_node_count, valid_inode_count; 992 unsigned int bimodal, avg_vblocks; 993 int util_free, util_valid, util_invalid; 994 int rsvd_segs, overp_segs; 995 int dirty_count, node_pages, meta_pages; 996 int prefree_count, call_count; 997 int tot_segs, node_segs, data_segs, free_segs, free_secs; 998 int tot_blks, data_blks, node_blks; 999 int curseg[NR_CURSEG_TYPE]; 1000 int cursec[NR_CURSEG_TYPE]; 1001 int curzone[NR_CURSEG_TYPE]; 1002 1003 unsigned int segment_count[2]; 1004 unsigned int block_count[2]; 1005 unsigned base_mem, cache_mem; 1006 }; 1007 1008 #define stat_inc_call_count(si) ((si)->call_count++) 1009 1010 #define stat_inc_seg_count(sbi, type) \ 1011 do { \ 1012 struct f2fs_stat_info *si = sbi->stat_info; \ 1013 (si)->tot_segs++; \ 1014 if (type == SUM_TYPE_DATA) \ 1015 si->data_segs++; \ 1016 else \ 1017 si->node_segs++; \ 1018 } while (0) 1019 1020 #define stat_inc_tot_blk_count(si, blks) \ 1021 (si->tot_blks += (blks)) 1022 1023 #define stat_inc_data_blk_count(sbi, blks) \ 1024 do { \ 1025 struct f2fs_stat_info *si = sbi->stat_info; \ 1026 stat_inc_tot_blk_count(si, blks); \ 1027 si->data_blks += (blks); \ 1028 } while (0) 1029 1030 #define stat_inc_node_blk_count(sbi, blks) \ 1031 do { \ 1032 struct f2fs_stat_info *si = sbi->stat_info; \ 1033 stat_inc_tot_blk_count(si, blks); \ 1034 si->node_blks += (blks); \ 1035 } while (0) 1036 1037 int f2fs_build_stats(struct f2fs_sb_info *); 1038 void f2fs_destroy_stats(struct f2fs_sb_info *); 1039 void destroy_root_stats(void); 1040 #else 1041 #define stat_inc_call_count(si) 1042 #define stat_inc_seg_count(si, type) 1043 #define stat_inc_tot_blk_count(si, blks) 1044 #define stat_inc_data_blk_count(si, blks) 1045 #define stat_inc_node_blk_count(sbi, blks) 1046 1047 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1048 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1049 static inline void destroy_root_stats(void) { } 1050 #endif 1051 1052 extern const struct file_operations f2fs_dir_operations; 1053 extern const struct file_operations f2fs_file_operations; 1054 extern const struct inode_operations f2fs_file_inode_operations; 1055 extern const struct address_space_operations f2fs_dblock_aops; 1056 extern const struct address_space_operations f2fs_node_aops; 1057 extern const struct address_space_operations f2fs_meta_aops; 1058 extern const struct inode_operations f2fs_dir_inode_operations; 1059 extern const struct inode_operations f2fs_symlink_inode_operations; 1060 extern const struct inode_operations f2fs_special_inode_operations; 1061 #endif 1062