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 bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 467 { 468 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 469 return ckpt_flags & f; 470 } 471 472 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 473 { 474 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 475 ckpt_flags |= f; 476 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 477 } 478 479 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 480 { 481 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 482 ckpt_flags &= (~f); 483 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 484 } 485 486 static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t) 487 { 488 mutex_lock_nested(&sbi->fs_lock[t], t); 489 } 490 491 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t) 492 { 493 mutex_unlock(&sbi->fs_lock[t]); 494 } 495 496 /* 497 * Check whether the given nid is within node id range. 498 */ 499 static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 500 { 501 BUG_ON((nid >= NM_I(sbi)->max_nid)); 502 } 503 504 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 505 506 /* 507 * Check whether the inode has blocks or not 508 */ 509 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 510 { 511 if (F2FS_I(inode)->i_xattr_nid) 512 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1); 513 else 514 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS); 515 } 516 517 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 518 struct inode *inode, blkcnt_t count) 519 { 520 block_t valid_block_count; 521 522 spin_lock(&sbi->stat_lock); 523 valid_block_count = 524 sbi->total_valid_block_count + (block_t)count; 525 if (valid_block_count > sbi->user_block_count) { 526 spin_unlock(&sbi->stat_lock); 527 return false; 528 } 529 inode->i_blocks += count; 530 sbi->total_valid_block_count = valid_block_count; 531 sbi->alloc_valid_block_count += (block_t)count; 532 spin_unlock(&sbi->stat_lock); 533 return true; 534 } 535 536 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi, 537 struct inode *inode, 538 blkcnt_t count) 539 { 540 spin_lock(&sbi->stat_lock); 541 BUG_ON(sbi->total_valid_block_count < (block_t) count); 542 BUG_ON(inode->i_blocks < count); 543 inode->i_blocks -= count; 544 sbi->total_valid_block_count -= (block_t)count; 545 spin_unlock(&sbi->stat_lock); 546 return 0; 547 } 548 549 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 550 { 551 atomic_inc(&sbi->nr_pages[count_type]); 552 F2FS_SET_SB_DIRT(sbi); 553 } 554 555 static inline void inode_inc_dirty_dents(struct inode *inode) 556 { 557 atomic_inc(&F2FS_I(inode)->dirty_dents); 558 } 559 560 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 561 { 562 atomic_dec(&sbi->nr_pages[count_type]); 563 } 564 565 static inline void inode_dec_dirty_dents(struct inode *inode) 566 { 567 atomic_dec(&F2FS_I(inode)->dirty_dents); 568 } 569 570 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 571 { 572 return atomic_read(&sbi->nr_pages[count_type]); 573 } 574 575 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 576 { 577 block_t ret; 578 spin_lock(&sbi->stat_lock); 579 ret = sbi->total_valid_block_count; 580 spin_unlock(&sbi->stat_lock); 581 return ret; 582 } 583 584 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 585 { 586 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 587 588 /* return NAT or SIT bitmap */ 589 if (flag == NAT_BITMAP) 590 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 591 else if (flag == SIT_BITMAP) 592 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 593 594 return 0; 595 } 596 597 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 598 { 599 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 600 int offset = (flag == NAT_BITMAP) ? 601 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 602 return &ckpt->sit_nat_version_bitmap + offset; 603 } 604 605 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 606 { 607 block_t start_addr; 608 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 609 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver); 610 611 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 612 613 /* 614 * odd numbered checkpoint should at cp segment 0 615 * and even segent must be at cp segment 1 616 */ 617 if (!(ckpt_version & 1)) 618 start_addr += sbi->blocks_per_seg; 619 620 return start_addr; 621 } 622 623 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 624 { 625 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 626 } 627 628 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 629 struct inode *inode, 630 unsigned int count) 631 { 632 block_t valid_block_count; 633 unsigned int valid_node_count; 634 635 spin_lock(&sbi->stat_lock); 636 637 valid_block_count = sbi->total_valid_block_count + (block_t)count; 638 sbi->alloc_valid_block_count += (block_t)count; 639 valid_node_count = sbi->total_valid_node_count + count; 640 641 if (valid_block_count > sbi->user_block_count) { 642 spin_unlock(&sbi->stat_lock); 643 return false; 644 } 645 646 if (valid_node_count > sbi->total_node_count) { 647 spin_unlock(&sbi->stat_lock); 648 return false; 649 } 650 651 if (inode) 652 inode->i_blocks += count; 653 sbi->total_valid_node_count = valid_node_count; 654 sbi->total_valid_block_count = valid_block_count; 655 spin_unlock(&sbi->stat_lock); 656 657 return true; 658 } 659 660 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 661 struct inode *inode, 662 unsigned int count) 663 { 664 spin_lock(&sbi->stat_lock); 665 666 BUG_ON(sbi->total_valid_block_count < count); 667 BUG_ON(sbi->total_valid_node_count < count); 668 BUG_ON(inode->i_blocks < count); 669 670 inode->i_blocks -= count; 671 sbi->total_valid_node_count -= count; 672 sbi->total_valid_block_count -= (block_t)count; 673 674 spin_unlock(&sbi->stat_lock); 675 } 676 677 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 678 { 679 unsigned int ret; 680 spin_lock(&sbi->stat_lock); 681 ret = sbi->total_valid_node_count; 682 spin_unlock(&sbi->stat_lock); 683 return ret; 684 } 685 686 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 687 { 688 spin_lock(&sbi->stat_lock); 689 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count); 690 sbi->total_valid_inode_count++; 691 spin_unlock(&sbi->stat_lock); 692 } 693 694 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi) 695 { 696 spin_lock(&sbi->stat_lock); 697 BUG_ON(!sbi->total_valid_inode_count); 698 sbi->total_valid_inode_count--; 699 spin_unlock(&sbi->stat_lock); 700 return 0; 701 } 702 703 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 704 { 705 unsigned int ret; 706 spin_lock(&sbi->stat_lock); 707 ret = sbi->total_valid_inode_count; 708 spin_unlock(&sbi->stat_lock); 709 return ret; 710 } 711 712 static inline void f2fs_put_page(struct page *page, int unlock) 713 { 714 if (!page || IS_ERR(page)) 715 return; 716 717 if (unlock) { 718 BUG_ON(!PageLocked(page)); 719 unlock_page(page); 720 } 721 page_cache_release(page); 722 } 723 724 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 725 { 726 if (dn->node_page) 727 f2fs_put_page(dn->node_page, 1); 728 if (dn->inode_page && dn->node_page != dn->inode_page) 729 f2fs_put_page(dn->inode_page, 0); 730 dn->node_page = NULL; 731 dn->inode_page = NULL; 732 } 733 734 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 735 size_t size, void (*ctor)(void *)) 736 { 737 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); 738 } 739 740 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 741 742 static inline bool IS_INODE(struct page *page) 743 { 744 struct f2fs_node *p = (struct f2fs_node *)page_address(page); 745 return RAW_IS_INODE(p); 746 } 747 748 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 749 { 750 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 751 } 752 753 static inline block_t datablock_addr(struct page *node_page, 754 unsigned int offset) 755 { 756 struct f2fs_node *raw_node; 757 __le32 *addr_array; 758 raw_node = (struct f2fs_node *)page_address(node_page); 759 addr_array = blkaddr_in_node(raw_node); 760 return le32_to_cpu(addr_array[offset]); 761 } 762 763 static inline int f2fs_test_bit(unsigned int nr, char *addr) 764 { 765 int mask; 766 767 addr += (nr >> 3); 768 mask = 1 << (7 - (nr & 0x07)); 769 return mask & *addr; 770 } 771 772 static inline int f2fs_set_bit(unsigned int nr, char *addr) 773 { 774 int mask; 775 int ret; 776 777 addr += (nr >> 3); 778 mask = 1 << (7 - (nr & 0x07)); 779 ret = mask & *addr; 780 *addr |= mask; 781 return ret; 782 } 783 784 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 785 { 786 int mask; 787 int ret; 788 789 addr += (nr >> 3); 790 mask = 1 << (7 - (nr & 0x07)); 791 ret = mask & *addr; 792 *addr &= ~mask; 793 return ret; 794 } 795 796 /* used for f2fs_inode_info->flags */ 797 enum { 798 FI_NEW_INODE, /* indicate newly allocated inode */ 799 FI_NEED_CP, /* need to do checkpoint during fsync */ 800 FI_INC_LINK, /* need to increment i_nlink */ 801 FI_ACL_MODE, /* indicate acl mode */ 802 FI_NO_ALLOC, /* should not allocate any blocks */ 803 }; 804 805 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 806 { 807 set_bit(flag, &fi->flags); 808 } 809 810 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 811 { 812 return test_bit(flag, &fi->flags); 813 } 814 815 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 816 { 817 clear_bit(flag, &fi->flags); 818 } 819 820 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 821 { 822 fi->i_acl_mode = mode; 823 set_inode_flag(fi, FI_ACL_MODE); 824 } 825 826 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 827 { 828 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 829 clear_inode_flag(fi, FI_ACL_MODE); 830 return 1; 831 } 832 return 0; 833 } 834 835 /* 836 * file.c 837 */ 838 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 839 void truncate_data_blocks(struct dnode_of_data *); 840 void f2fs_truncate(struct inode *); 841 int f2fs_setattr(struct dentry *, struct iattr *); 842 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 843 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 844 845 /* 846 * inode.c 847 */ 848 void f2fs_set_inode_flags(struct inode *); 849 struct inode *f2fs_iget_nowait(struct super_block *, unsigned long); 850 struct inode *f2fs_iget(struct super_block *, unsigned long); 851 void update_inode(struct inode *, struct page *); 852 int f2fs_write_inode(struct inode *, struct writeback_control *); 853 void f2fs_evict_inode(struct inode *); 854 855 /* 856 * namei.c 857 */ 858 struct dentry *f2fs_get_parent(struct dentry *child); 859 860 /* 861 * dir.c 862 */ 863 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 864 struct page **); 865 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 866 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 867 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 868 struct page *, struct inode *); 869 void init_dent_inode(struct dentry *, struct page *); 870 int f2fs_add_link(struct dentry *, struct inode *); 871 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 872 int f2fs_make_empty(struct inode *, struct inode *); 873 bool f2fs_empty_dir(struct inode *); 874 875 /* 876 * super.c 877 */ 878 int f2fs_sync_fs(struct super_block *, int); 879 880 /* 881 * hash.c 882 */ 883 f2fs_hash_t f2fs_dentry_hash(const char *, int); 884 885 /* 886 * node.c 887 */ 888 struct dnode_of_data; 889 struct node_info; 890 891 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 892 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 893 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 894 int truncate_inode_blocks(struct inode *, pgoff_t); 895 int remove_inode_page(struct inode *); 896 int new_inode_page(struct inode *, struct dentry *); 897 struct page *new_node_page(struct dnode_of_data *, unsigned int); 898 void ra_node_page(struct f2fs_sb_info *, nid_t); 899 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 900 struct page *get_node_page_ra(struct page *, int); 901 void sync_inode_page(struct dnode_of_data *); 902 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 903 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 904 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 905 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 906 void recover_node_page(struct f2fs_sb_info *, struct page *, 907 struct f2fs_summary *, struct node_info *, block_t); 908 int recover_inode_page(struct f2fs_sb_info *, struct page *); 909 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 910 struct f2fs_summary_block *); 911 void flush_nat_entries(struct f2fs_sb_info *); 912 int build_node_manager(struct f2fs_sb_info *); 913 void destroy_node_manager(struct f2fs_sb_info *); 914 int create_node_manager_caches(void); 915 void destroy_node_manager_caches(void); 916 917 /* 918 * segment.c 919 */ 920 void f2fs_balance_fs(struct f2fs_sb_info *); 921 void invalidate_blocks(struct f2fs_sb_info *, block_t); 922 void locate_dirty_segment(struct f2fs_sb_info *, unsigned int); 923 void clear_prefree_segments(struct f2fs_sb_info *); 924 int npages_for_summary_flush(struct f2fs_sb_info *); 925 void allocate_new_segments(struct f2fs_sb_info *); 926 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 927 struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t); 928 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync); 929 int write_meta_page(struct f2fs_sb_info *, struct page *, 930 struct writeback_control *); 931 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, 932 block_t, block_t *); 933 void write_data_page(struct inode *, struct page *, struct dnode_of_data*, 934 block_t, block_t *); 935 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t); 936 void recover_data_page(struct f2fs_sb_info *, struct page *, 937 struct f2fs_summary *, block_t, block_t); 938 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 939 struct f2fs_summary *, block_t, block_t); 940 void write_data_summaries(struct f2fs_sb_info *, block_t); 941 void write_node_summaries(struct f2fs_sb_info *, block_t); 942 int lookup_journal_in_cursum(struct f2fs_summary_block *, 943 int, unsigned int, int); 944 void flush_sit_entries(struct f2fs_sb_info *); 945 int build_segment_manager(struct f2fs_sb_info *); 946 void reset_victim_segmap(struct f2fs_sb_info *); 947 void destroy_segment_manager(struct f2fs_sb_info *); 948 949 /* 950 * checkpoint.c 951 */ 952 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 953 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 954 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 955 int check_orphan_space(struct f2fs_sb_info *); 956 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 957 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 958 int recover_orphan_inodes(struct f2fs_sb_info *); 959 int get_valid_checkpoint(struct f2fs_sb_info *); 960 void set_dirty_dir_page(struct inode *, struct page *); 961 void remove_dirty_dir_inode(struct inode *); 962 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 963 void block_operations(struct f2fs_sb_info *); 964 void write_checkpoint(struct f2fs_sb_info *, bool, bool); 965 void init_orphan_info(struct f2fs_sb_info *); 966 int create_checkpoint_caches(void); 967 void destroy_checkpoint_caches(void); 968 969 /* 970 * data.c 971 */ 972 int reserve_new_block(struct dnode_of_data *); 973 void update_extent_cache(block_t, struct dnode_of_data *); 974 struct page *find_data_page(struct inode *, pgoff_t); 975 struct page *get_lock_data_page(struct inode *, pgoff_t); 976 struct page *get_new_data_page(struct inode *, pgoff_t, bool); 977 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int); 978 int do_write_data_page(struct page *); 979 980 /* 981 * gc.c 982 */ 983 int start_gc_thread(struct f2fs_sb_info *); 984 void stop_gc_thread(struct f2fs_sb_info *); 985 block_t start_bidx_of_node(unsigned int); 986 int f2fs_gc(struct f2fs_sb_info *, int); 987 void build_gc_manager(struct f2fs_sb_info *); 988 int create_gc_caches(void); 989 void destroy_gc_caches(void); 990 991 /* 992 * recovery.c 993 */ 994 void recover_fsync_data(struct f2fs_sb_info *); 995 bool space_for_roll_forward(struct f2fs_sb_info *); 996 997 /* 998 * debug.c 999 */ 1000 #ifdef CONFIG_F2FS_STAT_FS 1001 struct f2fs_stat_info { 1002 struct list_head stat_list; 1003 struct f2fs_sb_info *sbi; 1004 struct mutex stat_lock; 1005 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1006 int main_area_segs, main_area_sections, main_area_zones; 1007 int hit_ext, total_ext; 1008 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1009 int nats, sits, fnids; 1010 int total_count, utilization; 1011 int bg_gc; 1012 unsigned int valid_count, valid_node_count, valid_inode_count; 1013 unsigned int bimodal, avg_vblocks; 1014 int util_free, util_valid, util_invalid; 1015 int rsvd_segs, overp_segs; 1016 int dirty_count, node_pages, meta_pages; 1017 int prefree_count, call_count; 1018 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1019 int tot_blks, data_blks, node_blks; 1020 int curseg[NR_CURSEG_TYPE]; 1021 int cursec[NR_CURSEG_TYPE]; 1022 int curzone[NR_CURSEG_TYPE]; 1023 1024 unsigned int segment_count[2]; 1025 unsigned int block_count[2]; 1026 unsigned base_mem, cache_mem; 1027 }; 1028 1029 #define stat_inc_call_count(si) ((si)->call_count++) 1030 1031 #define stat_inc_seg_count(sbi, type) \ 1032 do { \ 1033 struct f2fs_stat_info *si = sbi->stat_info; \ 1034 (si)->tot_segs++; \ 1035 if (type == SUM_TYPE_DATA) \ 1036 si->data_segs++; \ 1037 else \ 1038 si->node_segs++; \ 1039 } while (0) 1040 1041 #define stat_inc_tot_blk_count(si, blks) \ 1042 (si->tot_blks += (blks)) 1043 1044 #define stat_inc_data_blk_count(sbi, blks) \ 1045 do { \ 1046 struct f2fs_stat_info *si = sbi->stat_info; \ 1047 stat_inc_tot_blk_count(si, blks); \ 1048 si->data_blks += (blks); \ 1049 } while (0) 1050 1051 #define stat_inc_node_blk_count(sbi, blks) \ 1052 do { \ 1053 struct f2fs_stat_info *si = sbi->stat_info; \ 1054 stat_inc_tot_blk_count(si, blks); \ 1055 si->node_blks += (blks); \ 1056 } while (0) 1057 1058 int f2fs_build_stats(struct f2fs_sb_info *); 1059 void f2fs_destroy_stats(struct f2fs_sb_info *); 1060 void destroy_root_stats(void); 1061 #else 1062 #define stat_inc_call_count(si) 1063 #define stat_inc_seg_count(si, type) 1064 #define stat_inc_tot_blk_count(si, blks) 1065 #define stat_inc_data_blk_count(si, blks) 1066 #define stat_inc_node_blk_count(sbi, blks) 1067 1068 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1069 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1070 static inline void destroy_root_stats(void) { } 1071 #endif 1072 1073 extern const struct file_operations f2fs_dir_operations; 1074 extern const struct file_operations f2fs_file_operations; 1075 extern const struct inode_operations f2fs_file_inode_operations; 1076 extern const struct address_space_operations f2fs_dblock_aops; 1077 extern const struct address_space_operations f2fs_node_aops; 1078 extern const struct address_space_operations f2fs_meta_aops; 1079 extern const struct inode_operations f2fs_dir_inode_operations; 1080 extern const struct inode_operations f2fs_symlink_inode_operations; 1081 extern const struct inode_operations f2fs_special_inode_operations; 1082 #endif 1083