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 #define F2FS_MOUNT_FLUSH_MERGE 0x00000200 44 #define F2FS_MOUNT_NOBARRIER 0x00000400 45 46 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 47 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 48 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 49 50 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 51 typecheck(unsigned long long, b) && \ 52 ((long long)((a) - (b)) > 0)) 53 54 typedef u32 block_t; /* 55 * should not change u32, since it is the on-disk block 56 * address format, __le32. 57 */ 58 typedef u32 nid_t; 59 60 struct f2fs_mount_info { 61 unsigned int opt; 62 }; 63 64 #define CRCPOLY_LE 0xedb88320 65 66 static inline __u32 f2fs_crc32(void *buf, size_t len) 67 { 68 unsigned char *p = (unsigned char *)buf; 69 __u32 crc = F2FS_SUPER_MAGIC; 70 int i; 71 72 while (len--) { 73 crc ^= *p++; 74 for (i = 0; i < 8; i++) 75 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); 76 } 77 return crc; 78 } 79 80 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size) 81 { 82 return f2fs_crc32(buf, buf_size) == blk_crc; 83 } 84 85 /* 86 * For checkpoint manager 87 */ 88 enum { 89 NAT_BITMAP, 90 SIT_BITMAP 91 }; 92 93 /* 94 * For CP/NAT/SIT/SSA readahead 95 */ 96 enum { 97 META_CP, 98 META_NAT, 99 META_SIT, 100 META_SSA 101 }; 102 103 /* for the list of ino */ 104 enum { 105 ORPHAN_INO, /* for orphan ino list */ 106 APPEND_INO, /* for append ino list */ 107 UPDATE_INO, /* for update ino list */ 108 MAX_INO_ENTRY, /* max. list */ 109 }; 110 111 struct ino_entry { 112 struct list_head list; /* list head */ 113 nid_t ino; /* inode number */ 114 }; 115 116 /* for the list of directory inodes */ 117 struct dir_inode_entry { 118 struct list_head list; /* list head */ 119 struct inode *inode; /* vfs inode pointer */ 120 }; 121 122 /* for the list of blockaddresses to be discarded */ 123 struct discard_entry { 124 struct list_head list; /* list head */ 125 block_t blkaddr; /* block address to be discarded */ 126 int len; /* # of consecutive blocks of the discard */ 127 }; 128 129 /* for the list of fsync inodes, used only during recovery */ 130 struct fsync_inode_entry { 131 struct list_head list; /* list head */ 132 struct inode *inode; /* vfs inode pointer */ 133 block_t blkaddr; /* block address locating the last inode */ 134 }; 135 136 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 137 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 138 139 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 140 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 141 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 142 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 143 144 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 145 { 146 int before = nats_in_cursum(rs); 147 rs->n_nats = cpu_to_le16(before + i); 148 return before; 149 } 150 151 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 152 { 153 int before = sits_in_cursum(rs); 154 rs->n_sits = cpu_to_le16(before + i); 155 return before; 156 } 157 158 /* 159 * ioctl commands 160 */ 161 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 162 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 163 164 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 165 /* 166 * ioctl commands in 32 bit emulation 167 */ 168 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 169 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 170 #endif 171 172 /* 173 * For INODE and NODE manager 174 */ 175 /* 176 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 177 * as its node offset to distinguish from index node blocks. 178 * But some bits are used to mark the node block. 179 */ 180 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 181 >> OFFSET_BIT_SHIFT) 182 enum { 183 ALLOC_NODE, /* allocate a new node page if needed */ 184 LOOKUP_NODE, /* look up a node without readahead */ 185 LOOKUP_NODE_RA, /* 186 * look up a node with readahead called 187 * by get_data_block. 188 */ 189 }; 190 191 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 192 193 #define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */ 194 195 /* for in-memory extent cache entry */ 196 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */ 197 198 struct extent_info { 199 rwlock_t ext_lock; /* rwlock for consistency */ 200 unsigned int fofs; /* start offset in a file */ 201 u32 blk_addr; /* start block address of the extent */ 202 unsigned int len; /* length of the extent */ 203 }; 204 205 /* 206 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 207 */ 208 #define FADVISE_COLD_BIT 0x01 209 #define FADVISE_LOST_PINO_BIT 0x02 210 211 #define DEF_DIR_LEVEL 0 212 213 struct f2fs_inode_info { 214 struct inode vfs_inode; /* serve a vfs inode */ 215 unsigned long i_flags; /* keep an inode flags for ioctl */ 216 unsigned char i_advise; /* use to give file attribute hints */ 217 unsigned char i_dir_level; /* use for dentry level for large dir */ 218 unsigned int i_current_depth; /* use only in directory structure */ 219 unsigned int i_pino; /* parent inode number */ 220 umode_t i_acl_mode; /* keep file acl mode temporarily */ 221 222 /* Use below internally in f2fs*/ 223 unsigned long flags; /* use to pass per-file flags */ 224 struct rw_semaphore i_sem; /* protect fi info */ 225 atomic_t dirty_dents; /* # of dirty dentry pages */ 226 f2fs_hash_t chash; /* hash value of given file name */ 227 unsigned int clevel; /* maximum level of given file name */ 228 nid_t i_xattr_nid; /* node id that contains xattrs */ 229 unsigned long long xattr_ver; /* cp version of xattr modification */ 230 struct extent_info ext; /* in-memory extent cache entry */ 231 struct dir_inode_entry *dirty_dir; /* the pointer of dirty dir */ 232 }; 233 234 static inline void get_extent_info(struct extent_info *ext, 235 struct f2fs_extent i_ext) 236 { 237 write_lock(&ext->ext_lock); 238 ext->fofs = le32_to_cpu(i_ext.fofs); 239 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 240 ext->len = le32_to_cpu(i_ext.len); 241 write_unlock(&ext->ext_lock); 242 } 243 244 static inline void set_raw_extent(struct extent_info *ext, 245 struct f2fs_extent *i_ext) 246 { 247 read_lock(&ext->ext_lock); 248 i_ext->fofs = cpu_to_le32(ext->fofs); 249 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 250 i_ext->len = cpu_to_le32(ext->len); 251 read_unlock(&ext->ext_lock); 252 } 253 254 struct f2fs_nm_info { 255 block_t nat_blkaddr; /* base disk address of NAT */ 256 nid_t max_nid; /* maximum possible node ids */ 257 nid_t available_nids; /* maximum available node ids */ 258 nid_t next_scan_nid; /* the next nid to be scanned */ 259 unsigned int ram_thresh; /* control the memory footprint */ 260 261 /* NAT cache management */ 262 struct radix_tree_root nat_root;/* root of the nat entry cache */ 263 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 264 unsigned int nat_cnt; /* the # of cached nat entries */ 265 struct list_head nat_entries; /* cached nat entry list (clean) */ 266 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ 267 struct list_head nat_entry_set; /* nat entry set list */ 268 unsigned int dirty_nat_cnt; /* total num of nat entries in set */ 269 270 /* free node ids management */ 271 struct radix_tree_root free_nid_root;/* root of the free_nid cache */ 272 struct list_head free_nid_list; /* a list for free nids */ 273 spinlock_t free_nid_list_lock; /* protect free nid list */ 274 unsigned int fcnt; /* the number of free node id */ 275 struct mutex build_lock; /* lock for build free nids */ 276 277 /* for checkpoint */ 278 char *nat_bitmap; /* NAT bitmap pointer */ 279 int bitmap_size; /* bitmap size */ 280 }; 281 282 /* 283 * this structure is used as one of function parameters. 284 * all the information are dedicated to a given direct node block determined 285 * by the data offset in a file. 286 */ 287 struct dnode_of_data { 288 struct inode *inode; /* vfs inode pointer */ 289 struct page *inode_page; /* its inode page, NULL is possible */ 290 struct page *node_page; /* cached direct node page */ 291 nid_t nid; /* node id of the direct node block */ 292 unsigned int ofs_in_node; /* data offset in the node page */ 293 bool inode_page_locked; /* inode page is locked or not */ 294 block_t data_blkaddr; /* block address of the node block */ 295 }; 296 297 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 298 struct page *ipage, struct page *npage, nid_t nid) 299 { 300 memset(dn, 0, sizeof(*dn)); 301 dn->inode = inode; 302 dn->inode_page = ipage; 303 dn->node_page = npage; 304 dn->nid = nid; 305 } 306 307 /* 308 * For SIT manager 309 * 310 * By default, there are 6 active log areas across the whole main area. 311 * When considering hot and cold data separation to reduce cleaning overhead, 312 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 313 * respectively. 314 * In the current design, you should not change the numbers intentionally. 315 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 316 * logs individually according to the underlying devices. (default: 6) 317 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 318 * data and 8 for node logs. 319 */ 320 #define NR_CURSEG_DATA_TYPE (3) 321 #define NR_CURSEG_NODE_TYPE (3) 322 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 323 324 enum { 325 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 326 CURSEG_WARM_DATA, /* data blocks */ 327 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 328 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 329 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 330 CURSEG_COLD_NODE, /* indirect node blocks */ 331 NO_CHECK_TYPE 332 }; 333 334 struct flush_cmd { 335 struct flush_cmd *next; 336 struct completion wait; 337 int ret; 338 }; 339 340 struct flush_cmd_control { 341 struct task_struct *f2fs_issue_flush; /* flush thread */ 342 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */ 343 struct flush_cmd *issue_list; /* list for command issue */ 344 struct flush_cmd *dispatch_list; /* list for command dispatch */ 345 spinlock_t issue_lock; /* for issue list lock */ 346 struct flush_cmd *issue_tail; /* list tail of issue list */ 347 }; 348 349 struct f2fs_sm_info { 350 struct sit_info *sit_info; /* whole segment information */ 351 struct free_segmap_info *free_info; /* free segment information */ 352 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 353 struct curseg_info *curseg_array; /* active segment information */ 354 355 block_t seg0_blkaddr; /* block address of 0'th segment */ 356 block_t main_blkaddr; /* start block address of main area */ 357 block_t ssa_blkaddr; /* start block address of SSA area */ 358 359 unsigned int segment_count; /* total # of segments */ 360 unsigned int main_segments; /* # of segments in main area */ 361 unsigned int reserved_segments; /* # of reserved segments */ 362 unsigned int ovp_segments; /* # of overprovision segments */ 363 364 /* a threshold to reclaim prefree segments */ 365 unsigned int rec_prefree_segments; 366 367 /* for small discard management */ 368 struct list_head discard_list; /* 4KB discard list */ 369 int nr_discards; /* # of discards in the list */ 370 int max_discards; /* max. discards to be issued */ 371 372 unsigned int ipu_policy; /* in-place-update policy */ 373 unsigned int min_ipu_util; /* in-place-update threshold */ 374 375 /* for flush command control */ 376 struct flush_cmd_control *cmd_control_info; 377 378 }; 379 380 /* 381 * For superblock 382 */ 383 /* 384 * COUNT_TYPE for monitoring 385 * 386 * f2fs monitors the number of several block types such as on-writeback, 387 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 388 */ 389 enum count_type { 390 F2FS_WRITEBACK, 391 F2FS_DIRTY_DENTS, 392 F2FS_DIRTY_NODES, 393 F2FS_DIRTY_META, 394 NR_COUNT_TYPE, 395 }; 396 397 /* 398 * The below are the page types of bios used in submti_bio(). 399 * The available types are: 400 * DATA User data pages. It operates as async mode. 401 * NODE Node pages. It operates as async mode. 402 * META FS metadata pages such as SIT, NAT, CP. 403 * NR_PAGE_TYPE The number of page types. 404 * META_FLUSH Make sure the previous pages are written 405 * with waiting the bio's completion 406 * ... Only can be used with META. 407 */ 408 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type)) 409 enum page_type { 410 DATA, 411 NODE, 412 META, 413 NR_PAGE_TYPE, 414 META_FLUSH, 415 }; 416 417 struct f2fs_io_info { 418 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ 419 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */ 420 }; 421 422 #define is_read_io(rw) (((rw) & 1) == READ) 423 struct f2fs_bio_info { 424 struct f2fs_sb_info *sbi; /* f2fs superblock */ 425 struct bio *bio; /* bios to merge */ 426 sector_t last_block_in_bio; /* last block number */ 427 struct f2fs_io_info fio; /* store buffered io info. */ 428 struct rw_semaphore io_rwsem; /* blocking op for bio */ 429 }; 430 431 struct f2fs_sb_info { 432 struct super_block *sb; /* pointer to VFS super block */ 433 struct proc_dir_entry *s_proc; /* proc entry */ 434 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 435 struct f2fs_super_block *raw_super; /* raw super block pointer */ 436 int s_dirty; /* dirty flag for checkpoint */ 437 438 /* for node-related operations */ 439 struct f2fs_nm_info *nm_info; /* node manager */ 440 struct inode *node_inode; /* cache node blocks */ 441 442 /* for segment-related operations */ 443 struct f2fs_sm_info *sm_info; /* segment manager */ 444 445 /* for bio operations */ 446 struct f2fs_bio_info read_io; /* for read bios */ 447 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */ 448 struct completion *wait_io; /* for completion bios */ 449 450 /* for checkpoint */ 451 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 452 struct inode *meta_inode; /* cache meta blocks */ 453 struct mutex cp_mutex; /* checkpoint procedure lock */ 454 struct rw_semaphore cp_rwsem; /* blocking FS operations */ 455 struct rw_semaphore node_write; /* locking node writes */ 456 struct mutex writepages; /* mutex for writepages() */ 457 bool por_doing; /* recovery is doing or not */ 458 wait_queue_head_t cp_wait; 459 460 /* for inode management */ 461 struct radix_tree_root ino_root[MAX_INO_ENTRY]; /* ino entry array */ 462 spinlock_t ino_lock[MAX_INO_ENTRY]; /* for ino entry lock */ 463 struct list_head ino_list[MAX_INO_ENTRY]; /* inode list head */ 464 465 /* for orphan inode, use 0'th array */ 466 unsigned int n_orphans; /* # of orphan inodes */ 467 unsigned int max_orphans; /* max orphan inodes */ 468 469 /* for directory inode management */ 470 struct list_head dir_inode_list; /* dir inode list */ 471 spinlock_t dir_inode_lock; /* for dir inode list lock */ 472 473 /* basic file system units */ 474 unsigned int log_sectors_per_block; /* log2 sectors per block */ 475 unsigned int log_blocksize; /* log2 block size */ 476 unsigned int blocksize; /* block size */ 477 unsigned int root_ino_num; /* root inode number*/ 478 unsigned int node_ino_num; /* node inode number*/ 479 unsigned int meta_ino_num; /* meta inode number*/ 480 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 481 unsigned int blocks_per_seg; /* blocks per segment */ 482 unsigned int segs_per_sec; /* segments per section */ 483 unsigned int secs_per_zone; /* sections per zone */ 484 unsigned int total_sections; /* total section count */ 485 unsigned int total_node_count; /* total node block count */ 486 unsigned int total_valid_node_count; /* valid node block count */ 487 unsigned int total_valid_inode_count; /* valid inode count */ 488 int active_logs; /* # of active logs */ 489 int dir_level; /* directory level */ 490 491 block_t user_block_count; /* # of user blocks */ 492 block_t total_valid_block_count; /* # of valid blocks */ 493 block_t alloc_valid_block_count; /* # of allocated blocks */ 494 block_t last_valid_block_count; /* for recovery */ 495 u32 s_next_generation; /* for NFS support */ 496 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 497 498 struct f2fs_mount_info mount_opt; /* mount options */ 499 500 /* for cleaning operations */ 501 struct mutex gc_mutex; /* mutex for GC */ 502 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 503 unsigned int cur_victim_sec; /* current victim section num */ 504 505 /* maximum # of trials to find a victim segment for SSR and GC */ 506 unsigned int max_victim_search; 507 508 /* 509 * for stat information. 510 * one is for the LFS mode, and the other is for the SSR mode. 511 */ 512 #ifdef CONFIG_F2FS_STAT_FS 513 struct f2fs_stat_info *stat_info; /* FS status information */ 514 unsigned int segment_count[2]; /* # of allocated segments */ 515 unsigned int block_count[2]; /* # of allocated blocks */ 516 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 517 int inline_inode; /* # of inline_data inodes */ 518 int bg_gc; /* background gc calls */ 519 unsigned int n_dirty_dirs; /* # of dir inodes */ 520 #endif 521 unsigned int last_victim[2]; /* last victim segment # */ 522 spinlock_t stat_lock; /* lock for stat operations */ 523 524 /* For sysfs suppport */ 525 struct kobject s_kobj; 526 struct completion s_kobj_unregister; 527 }; 528 529 /* 530 * Inline functions 531 */ 532 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 533 { 534 return container_of(inode, struct f2fs_inode_info, vfs_inode); 535 } 536 537 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 538 { 539 return sb->s_fs_info; 540 } 541 542 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 543 { 544 return (struct f2fs_super_block *)(sbi->raw_super); 545 } 546 547 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 548 { 549 return (struct f2fs_checkpoint *)(sbi->ckpt); 550 } 551 552 static inline struct f2fs_node *F2FS_NODE(struct page *page) 553 { 554 return (struct f2fs_node *)page_address(page); 555 } 556 557 static inline struct f2fs_inode *F2FS_INODE(struct page *page) 558 { 559 return &((struct f2fs_node *)page_address(page))->i; 560 } 561 562 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 563 { 564 return (struct f2fs_nm_info *)(sbi->nm_info); 565 } 566 567 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 568 { 569 return (struct f2fs_sm_info *)(sbi->sm_info); 570 } 571 572 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 573 { 574 return (struct sit_info *)(SM_I(sbi)->sit_info); 575 } 576 577 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 578 { 579 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 580 } 581 582 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 583 { 584 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 585 } 586 587 static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi) 588 { 589 return sbi->meta_inode->i_mapping; 590 } 591 592 static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi) 593 { 594 return sbi->node_inode->i_mapping; 595 } 596 597 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 598 { 599 sbi->s_dirty = 1; 600 } 601 602 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 603 { 604 sbi->s_dirty = 0; 605 } 606 607 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 608 { 609 return le64_to_cpu(cp->checkpoint_ver); 610 } 611 612 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 613 { 614 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 615 return ckpt_flags & f; 616 } 617 618 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 619 { 620 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 621 ckpt_flags |= f; 622 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 623 } 624 625 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 626 { 627 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 628 ckpt_flags &= (~f); 629 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 630 } 631 632 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 633 { 634 down_read(&sbi->cp_rwsem); 635 } 636 637 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) 638 { 639 up_read(&sbi->cp_rwsem); 640 } 641 642 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) 643 { 644 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex); 645 } 646 647 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 648 { 649 up_write(&sbi->cp_rwsem); 650 } 651 652 /* 653 * Check whether the given nid is within node id range. 654 */ 655 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 656 { 657 if (unlikely(nid < F2FS_ROOT_INO(sbi))) 658 return -EINVAL; 659 if (unlikely(nid >= NM_I(sbi)->max_nid)) 660 return -EINVAL; 661 return 0; 662 } 663 664 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 665 666 /* 667 * Check whether the inode has blocks or not 668 */ 669 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 670 { 671 if (F2FS_I(inode)->i_xattr_nid) 672 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1; 673 else 674 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS; 675 } 676 677 static inline bool f2fs_has_xattr_block(unsigned int ofs) 678 { 679 return ofs == XATTR_NODE_OFFSET; 680 } 681 682 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 683 struct inode *inode, blkcnt_t count) 684 { 685 block_t valid_block_count; 686 687 spin_lock(&sbi->stat_lock); 688 valid_block_count = 689 sbi->total_valid_block_count + (block_t)count; 690 if (unlikely(valid_block_count > sbi->user_block_count)) { 691 spin_unlock(&sbi->stat_lock); 692 return false; 693 } 694 inode->i_blocks += count; 695 sbi->total_valid_block_count = valid_block_count; 696 sbi->alloc_valid_block_count += (block_t)count; 697 spin_unlock(&sbi->stat_lock); 698 return true; 699 } 700 701 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi, 702 struct inode *inode, 703 blkcnt_t count) 704 { 705 spin_lock(&sbi->stat_lock); 706 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count); 707 f2fs_bug_on(inode->i_blocks < count); 708 inode->i_blocks -= count; 709 sbi->total_valid_block_count -= (block_t)count; 710 spin_unlock(&sbi->stat_lock); 711 } 712 713 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 714 { 715 atomic_inc(&sbi->nr_pages[count_type]); 716 F2FS_SET_SB_DIRT(sbi); 717 } 718 719 static inline void inode_inc_dirty_dents(struct inode *inode) 720 { 721 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 722 atomic_inc(&F2FS_I(inode)->dirty_dents); 723 } 724 725 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 726 { 727 atomic_dec(&sbi->nr_pages[count_type]); 728 } 729 730 static inline void inode_dec_dirty_dents(struct inode *inode) 731 { 732 if (!S_ISDIR(inode->i_mode)) 733 return; 734 735 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS); 736 atomic_dec(&F2FS_I(inode)->dirty_dents); 737 } 738 739 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 740 { 741 return atomic_read(&sbi->nr_pages[count_type]); 742 } 743 744 static inline int get_dirty_dents(struct inode *inode) 745 { 746 return atomic_read(&F2FS_I(inode)->dirty_dents); 747 } 748 749 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 750 { 751 unsigned int pages_per_sec = sbi->segs_per_sec * 752 (1 << sbi->log_blocks_per_seg); 753 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 754 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 755 } 756 757 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 758 { 759 return sbi->total_valid_block_count; 760 } 761 762 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 763 { 764 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 765 766 /* return NAT or SIT bitmap */ 767 if (flag == NAT_BITMAP) 768 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 769 else if (flag == SIT_BITMAP) 770 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 771 772 return 0; 773 } 774 775 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 776 { 777 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 778 int offset; 779 780 if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) { 781 if (flag == NAT_BITMAP) 782 return &ckpt->sit_nat_version_bitmap; 783 else 784 return (unsigned char *)ckpt + F2FS_BLKSIZE; 785 } else { 786 offset = (flag == NAT_BITMAP) ? 787 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 788 return &ckpt->sit_nat_version_bitmap + offset; 789 } 790 } 791 792 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 793 { 794 block_t start_addr; 795 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 796 unsigned long long ckpt_version = cur_cp_version(ckpt); 797 798 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 799 800 /* 801 * odd numbered checkpoint should at cp segment 0 802 * and even segent must be at cp segment 1 803 */ 804 if (!(ckpt_version & 1)) 805 start_addr += sbi->blocks_per_seg; 806 807 return start_addr; 808 } 809 810 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 811 { 812 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 813 } 814 815 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 816 struct inode *inode) 817 { 818 block_t valid_block_count; 819 unsigned int valid_node_count; 820 821 spin_lock(&sbi->stat_lock); 822 823 valid_block_count = sbi->total_valid_block_count + 1; 824 if (unlikely(valid_block_count > sbi->user_block_count)) { 825 spin_unlock(&sbi->stat_lock); 826 return false; 827 } 828 829 valid_node_count = sbi->total_valid_node_count + 1; 830 if (unlikely(valid_node_count > sbi->total_node_count)) { 831 spin_unlock(&sbi->stat_lock); 832 return false; 833 } 834 835 if (inode) 836 inode->i_blocks++; 837 838 sbi->alloc_valid_block_count++; 839 sbi->total_valid_node_count++; 840 sbi->total_valid_block_count++; 841 spin_unlock(&sbi->stat_lock); 842 843 return true; 844 } 845 846 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 847 struct inode *inode) 848 { 849 spin_lock(&sbi->stat_lock); 850 851 f2fs_bug_on(!sbi->total_valid_block_count); 852 f2fs_bug_on(!sbi->total_valid_node_count); 853 f2fs_bug_on(!inode->i_blocks); 854 855 inode->i_blocks--; 856 sbi->total_valid_node_count--; 857 sbi->total_valid_block_count--; 858 859 spin_unlock(&sbi->stat_lock); 860 } 861 862 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 863 { 864 return sbi->total_valid_node_count; 865 } 866 867 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 868 { 869 spin_lock(&sbi->stat_lock); 870 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count); 871 sbi->total_valid_inode_count++; 872 spin_unlock(&sbi->stat_lock); 873 } 874 875 static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi) 876 { 877 spin_lock(&sbi->stat_lock); 878 f2fs_bug_on(!sbi->total_valid_inode_count); 879 sbi->total_valid_inode_count--; 880 spin_unlock(&sbi->stat_lock); 881 } 882 883 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 884 { 885 return sbi->total_valid_inode_count; 886 } 887 888 static inline void f2fs_put_page(struct page *page, int unlock) 889 { 890 if (!page) 891 return; 892 893 if (unlock) { 894 f2fs_bug_on(!PageLocked(page)); 895 unlock_page(page); 896 } 897 page_cache_release(page); 898 } 899 900 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 901 { 902 if (dn->node_page) 903 f2fs_put_page(dn->node_page, 1); 904 if (dn->inode_page && dn->node_page != dn->inode_page) 905 f2fs_put_page(dn->inode_page, 0); 906 dn->node_page = NULL; 907 dn->inode_page = NULL; 908 } 909 910 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 911 size_t size) 912 { 913 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL); 914 } 915 916 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 917 gfp_t flags) 918 { 919 void *entry; 920 retry: 921 entry = kmem_cache_alloc(cachep, flags); 922 if (!entry) { 923 cond_resched(); 924 goto retry; 925 } 926 927 return entry; 928 } 929 930 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 931 932 static inline bool IS_INODE(struct page *page) 933 { 934 struct f2fs_node *p = F2FS_NODE(page); 935 return RAW_IS_INODE(p); 936 } 937 938 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 939 { 940 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 941 } 942 943 static inline block_t datablock_addr(struct page *node_page, 944 unsigned int offset) 945 { 946 struct f2fs_node *raw_node; 947 __le32 *addr_array; 948 raw_node = F2FS_NODE(node_page); 949 addr_array = blkaddr_in_node(raw_node); 950 return le32_to_cpu(addr_array[offset]); 951 } 952 953 static inline int f2fs_test_bit(unsigned int nr, char *addr) 954 { 955 int mask; 956 957 addr += (nr >> 3); 958 mask = 1 << (7 - (nr & 0x07)); 959 return mask & *addr; 960 } 961 962 static inline int f2fs_set_bit(unsigned int nr, char *addr) 963 { 964 int mask; 965 int ret; 966 967 addr += (nr >> 3); 968 mask = 1 << (7 - (nr & 0x07)); 969 ret = mask & *addr; 970 *addr |= mask; 971 return ret; 972 } 973 974 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 975 { 976 int mask; 977 int ret; 978 979 addr += (nr >> 3); 980 mask = 1 << (7 - (nr & 0x07)); 981 ret = mask & *addr; 982 *addr &= ~mask; 983 return ret; 984 } 985 986 /* used for f2fs_inode_info->flags */ 987 enum { 988 FI_NEW_INODE, /* indicate newly allocated inode */ 989 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 990 FI_DIRTY_DIR, /* indicate directory has dirty pages */ 991 FI_INC_LINK, /* need to increment i_nlink */ 992 FI_ACL_MODE, /* indicate acl mode */ 993 FI_NO_ALLOC, /* should not allocate any blocks */ 994 FI_UPDATE_DIR, /* should update inode block for consistency */ 995 FI_DELAY_IPUT, /* used for the recovery */ 996 FI_NO_EXTENT, /* not to use the extent cache */ 997 FI_INLINE_XATTR, /* used for inline xattr */ 998 FI_INLINE_DATA, /* used for inline data*/ 999 FI_APPEND_WRITE, /* inode has appended data */ 1000 FI_UPDATE_WRITE, /* inode has in-place-update data */ 1001 FI_NEED_IPU, /* used fo ipu for fdatasync */ 1002 }; 1003 1004 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 1005 { 1006 if (!test_bit(flag, &fi->flags)) 1007 set_bit(flag, &fi->flags); 1008 } 1009 1010 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 1011 { 1012 return test_bit(flag, &fi->flags); 1013 } 1014 1015 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 1016 { 1017 if (test_bit(flag, &fi->flags)) 1018 clear_bit(flag, &fi->flags); 1019 } 1020 1021 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 1022 { 1023 fi->i_acl_mode = mode; 1024 set_inode_flag(fi, FI_ACL_MODE); 1025 } 1026 1027 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) 1028 { 1029 if (is_inode_flag_set(fi, FI_ACL_MODE)) { 1030 clear_inode_flag(fi, FI_ACL_MODE); 1031 return 1; 1032 } 1033 return 0; 1034 } 1035 1036 static inline void get_inline_info(struct f2fs_inode_info *fi, 1037 struct f2fs_inode *ri) 1038 { 1039 if (ri->i_inline & F2FS_INLINE_XATTR) 1040 set_inode_flag(fi, FI_INLINE_XATTR); 1041 if (ri->i_inline & F2FS_INLINE_DATA) 1042 set_inode_flag(fi, FI_INLINE_DATA); 1043 } 1044 1045 static inline void set_raw_inline(struct f2fs_inode_info *fi, 1046 struct f2fs_inode *ri) 1047 { 1048 ri->i_inline = 0; 1049 1050 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 1051 ri->i_inline |= F2FS_INLINE_XATTR; 1052 if (is_inode_flag_set(fi, FI_INLINE_DATA)) 1053 ri->i_inline |= F2FS_INLINE_DATA; 1054 } 1055 1056 static inline int f2fs_has_inline_xattr(struct inode *inode) 1057 { 1058 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR); 1059 } 1060 1061 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 1062 { 1063 if (f2fs_has_inline_xattr(&fi->vfs_inode)) 1064 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 1065 return DEF_ADDRS_PER_INODE; 1066 } 1067 1068 static inline void *inline_xattr_addr(struct page *page) 1069 { 1070 struct f2fs_inode *ri = F2FS_INODE(page); 1071 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - 1072 F2FS_INLINE_XATTR_ADDRS]); 1073 } 1074 1075 static inline int inline_xattr_size(struct inode *inode) 1076 { 1077 if (f2fs_has_inline_xattr(inode)) 1078 return F2FS_INLINE_XATTR_ADDRS << 2; 1079 else 1080 return 0; 1081 } 1082 1083 static inline int f2fs_has_inline_data(struct inode *inode) 1084 { 1085 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA); 1086 } 1087 1088 static inline void *inline_data_addr(struct page *page) 1089 { 1090 struct f2fs_inode *ri = F2FS_INODE(page); 1091 return (void *)&(ri->i_addr[1]); 1092 } 1093 1094 static inline int f2fs_readonly(struct super_block *sb) 1095 { 1096 return sb->s_flags & MS_RDONLY; 1097 } 1098 1099 static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi) 1100 { 1101 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); 1102 sbi->sb->s_flags |= MS_RDONLY; 1103 } 1104 1105 #define get_inode_mode(i) \ 1106 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \ 1107 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode)) 1108 1109 /* get offset of first page in next direct node */ 1110 #define PGOFS_OF_NEXT_DNODE(pgofs, fi) \ 1111 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \ 1112 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \ 1113 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi)) 1114 1115 /* 1116 * file.c 1117 */ 1118 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 1119 void truncate_data_blocks(struct dnode_of_data *); 1120 int truncate_blocks(struct inode *, u64); 1121 void f2fs_truncate(struct inode *); 1122 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 1123 int f2fs_setattr(struct dentry *, struct iattr *); 1124 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 1125 int truncate_data_blocks_range(struct dnode_of_data *, int); 1126 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 1127 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 1128 1129 /* 1130 * inode.c 1131 */ 1132 void f2fs_set_inode_flags(struct inode *); 1133 struct inode *f2fs_iget(struct super_block *, unsigned long); 1134 int try_to_free_nats(struct f2fs_sb_info *, int); 1135 void update_inode(struct inode *, struct page *); 1136 void update_inode_page(struct inode *); 1137 int f2fs_write_inode(struct inode *, struct writeback_control *); 1138 void f2fs_evict_inode(struct inode *); 1139 1140 /* 1141 * namei.c 1142 */ 1143 struct dentry *f2fs_get_parent(struct dentry *child); 1144 1145 /* 1146 * dir.c 1147 */ 1148 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 1149 struct page **); 1150 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 1151 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 1152 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 1153 struct page *, struct inode *); 1154 int update_dent_inode(struct inode *, const struct qstr *); 1155 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 1156 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); 1157 int f2fs_do_tmpfile(struct inode *, struct inode *); 1158 int f2fs_make_empty(struct inode *, struct inode *); 1159 bool f2fs_empty_dir(struct inode *); 1160 1161 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1162 { 1163 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1164 inode); 1165 } 1166 1167 /* 1168 * super.c 1169 */ 1170 int f2fs_sync_fs(struct super_block *, int); 1171 extern __printf(3, 4) 1172 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1173 1174 /* 1175 * hash.c 1176 */ 1177 f2fs_hash_t f2fs_dentry_hash(const struct qstr *); 1178 1179 /* 1180 * node.c 1181 */ 1182 struct dnode_of_data; 1183 struct node_info; 1184 1185 bool available_free_memory(struct f2fs_sb_info *, int); 1186 int is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1187 bool fsync_mark_done(struct f2fs_sb_info *, nid_t); 1188 void fsync_mark_clear(struct f2fs_sb_info *, nid_t); 1189 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1190 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1191 int truncate_inode_blocks(struct inode *, pgoff_t); 1192 int truncate_xattr_node(struct inode *, struct page *); 1193 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t); 1194 void remove_inode_page(struct inode *); 1195 struct page *new_inode_page(struct inode *); 1196 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1197 void ra_node_page(struct f2fs_sb_info *, nid_t); 1198 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1199 struct page *get_node_page_ra(struct page *, int); 1200 void sync_inode_page(struct dnode_of_data *); 1201 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1202 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1203 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1204 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1205 void recover_node_page(struct f2fs_sb_info *, struct page *, 1206 struct f2fs_summary *, struct node_info *, block_t); 1207 void recover_inline_xattr(struct inode *, struct page *); 1208 bool recover_xattr_data(struct inode *, struct page *, block_t); 1209 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1210 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1211 struct f2fs_summary_block *); 1212 void flush_nat_entries(struct f2fs_sb_info *); 1213 int build_node_manager(struct f2fs_sb_info *); 1214 void destroy_node_manager(struct f2fs_sb_info *); 1215 int __init create_node_manager_caches(void); 1216 void destroy_node_manager_caches(void); 1217 1218 /* 1219 * segment.c 1220 */ 1221 void f2fs_balance_fs(struct f2fs_sb_info *); 1222 void f2fs_balance_fs_bg(struct f2fs_sb_info *); 1223 int f2fs_issue_flush(struct f2fs_sb_info *); 1224 int create_flush_cmd_control(struct f2fs_sb_info *); 1225 void destroy_flush_cmd_control(struct f2fs_sb_info *); 1226 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1227 void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); 1228 void clear_prefree_segments(struct f2fs_sb_info *); 1229 void discard_next_dnode(struct f2fs_sb_info *, block_t); 1230 int npages_for_summary_flush(struct f2fs_sb_info *); 1231 void allocate_new_segments(struct f2fs_sb_info *); 1232 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1233 void write_meta_page(struct f2fs_sb_info *, struct page *); 1234 void write_node_page(struct f2fs_sb_info *, struct page *, 1235 struct f2fs_io_info *, unsigned int, block_t, block_t *); 1236 void write_data_page(struct page *, struct dnode_of_data *, block_t *, 1237 struct f2fs_io_info *); 1238 void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *); 1239 void recover_data_page(struct f2fs_sb_info *, struct page *, 1240 struct f2fs_summary *, block_t, block_t); 1241 void rewrite_node_page(struct f2fs_sb_info *, struct page *, 1242 struct f2fs_summary *, block_t, block_t); 1243 void allocate_data_block(struct f2fs_sb_info *, struct page *, 1244 block_t, block_t *, struct f2fs_summary *, int); 1245 void f2fs_wait_on_page_writeback(struct page *, enum page_type); 1246 void write_data_summaries(struct f2fs_sb_info *, block_t); 1247 void write_node_summaries(struct f2fs_sb_info *, block_t); 1248 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1249 int, unsigned int, int); 1250 void flush_sit_entries(struct f2fs_sb_info *); 1251 int build_segment_manager(struct f2fs_sb_info *); 1252 void destroy_segment_manager(struct f2fs_sb_info *); 1253 int __init create_segment_manager_caches(void); 1254 void destroy_segment_manager_caches(void); 1255 1256 /* 1257 * checkpoint.c 1258 */ 1259 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1260 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1261 int ra_meta_pages(struct f2fs_sb_info *, int, int, int); 1262 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1263 void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type); 1264 void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type); 1265 bool exist_written_data(struct f2fs_sb_info *, nid_t, int); 1266 int acquire_orphan_inode(struct f2fs_sb_info *); 1267 void release_orphan_inode(struct f2fs_sb_info *); 1268 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1269 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1270 void recover_orphan_inodes(struct f2fs_sb_info *); 1271 int get_valid_checkpoint(struct f2fs_sb_info *); 1272 void set_dirty_dir_page(struct inode *, struct page *); 1273 void add_dirty_dir_inode(struct inode *); 1274 void remove_dirty_dir_inode(struct inode *); 1275 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1276 void write_checkpoint(struct f2fs_sb_info *, bool); 1277 void init_ino_entry_info(struct f2fs_sb_info *); 1278 int __init create_checkpoint_caches(void); 1279 void destroy_checkpoint_caches(void); 1280 1281 /* 1282 * data.c 1283 */ 1284 void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int); 1285 int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int); 1286 void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t, 1287 struct f2fs_io_info *); 1288 int reserve_new_block(struct dnode_of_data *); 1289 int f2fs_reserve_block(struct dnode_of_data *, pgoff_t); 1290 void update_extent_cache(block_t, struct dnode_of_data *); 1291 struct page *find_data_page(struct inode *, pgoff_t, bool); 1292 struct page *get_lock_data_page(struct inode *, pgoff_t); 1293 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1294 int do_write_data_page(struct page *, struct f2fs_io_info *); 1295 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64); 1296 1297 /* 1298 * gc.c 1299 */ 1300 int start_gc_thread(struct f2fs_sb_info *); 1301 void stop_gc_thread(struct f2fs_sb_info *); 1302 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1303 int f2fs_gc(struct f2fs_sb_info *); 1304 void build_gc_manager(struct f2fs_sb_info *); 1305 int __init create_gc_caches(void); 1306 void destroy_gc_caches(void); 1307 1308 /* 1309 * recovery.c 1310 */ 1311 int recover_fsync_data(struct f2fs_sb_info *); 1312 bool space_for_roll_forward(struct f2fs_sb_info *); 1313 1314 /* 1315 * debug.c 1316 */ 1317 #ifdef CONFIG_F2FS_STAT_FS 1318 struct f2fs_stat_info { 1319 struct list_head stat_list; 1320 struct f2fs_sb_info *sbi; 1321 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1322 int main_area_segs, main_area_sections, main_area_zones; 1323 int hit_ext, total_ext; 1324 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1325 int nats, sits, fnids; 1326 int total_count, utilization; 1327 int bg_gc, inline_inode; 1328 unsigned int valid_count, valid_node_count, valid_inode_count; 1329 unsigned int bimodal, avg_vblocks; 1330 int util_free, util_valid, util_invalid; 1331 int rsvd_segs, overp_segs; 1332 int dirty_count, node_pages, meta_pages; 1333 int prefree_count, call_count, cp_count; 1334 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1335 int tot_blks, data_blks, node_blks; 1336 int curseg[NR_CURSEG_TYPE]; 1337 int cursec[NR_CURSEG_TYPE]; 1338 int curzone[NR_CURSEG_TYPE]; 1339 1340 unsigned int segment_count[2]; 1341 unsigned int block_count[2]; 1342 unsigned base_mem, cache_mem; 1343 }; 1344 1345 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1346 { 1347 return (struct f2fs_stat_info *)sbi->stat_info; 1348 } 1349 1350 #define stat_inc_cp_count(si) ((si)->cp_count++) 1351 #define stat_inc_call_count(si) ((si)->call_count++) 1352 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) 1353 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) 1354 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) 1355 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) 1356 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) 1357 #define stat_inc_inline_inode(inode) \ 1358 do { \ 1359 if (f2fs_has_inline_data(inode)) \ 1360 ((F2FS_SB(inode->i_sb))->inline_inode++); \ 1361 } while (0) 1362 #define stat_dec_inline_inode(inode) \ 1363 do { \ 1364 if (f2fs_has_inline_data(inode)) \ 1365 ((F2FS_SB(inode->i_sb))->inline_inode--); \ 1366 } while (0) 1367 1368 #define stat_inc_seg_type(sbi, curseg) \ 1369 ((sbi)->segment_count[(curseg)->alloc_type]++) 1370 #define stat_inc_block_count(sbi, curseg) \ 1371 ((sbi)->block_count[(curseg)->alloc_type]++) 1372 1373 #define stat_inc_seg_count(sbi, type) \ 1374 do { \ 1375 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1376 (si)->tot_segs++; \ 1377 if (type == SUM_TYPE_DATA) \ 1378 si->data_segs++; \ 1379 else \ 1380 si->node_segs++; \ 1381 } while (0) 1382 1383 #define stat_inc_tot_blk_count(si, blks) \ 1384 (si->tot_blks += (blks)) 1385 1386 #define stat_inc_data_blk_count(sbi, blks) \ 1387 do { \ 1388 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1389 stat_inc_tot_blk_count(si, blks); \ 1390 si->data_blks += (blks); \ 1391 } while (0) 1392 1393 #define stat_inc_node_blk_count(sbi, blks) \ 1394 do { \ 1395 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1396 stat_inc_tot_blk_count(si, blks); \ 1397 si->node_blks += (blks); \ 1398 } while (0) 1399 1400 int f2fs_build_stats(struct f2fs_sb_info *); 1401 void f2fs_destroy_stats(struct f2fs_sb_info *); 1402 void __init f2fs_create_root_stats(void); 1403 void f2fs_destroy_root_stats(void); 1404 #else 1405 #define stat_inc_cp_count(si) 1406 #define stat_inc_call_count(si) 1407 #define stat_inc_bggc_count(si) 1408 #define stat_inc_dirty_dir(sbi) 1409 #define stat_dec_dirty_dir(sbi) 1410 #define stat_inc_total_hit(sb) 1411 #define stat_inc_read_hit(sb) 1412 #define stat_inc_inline_inode(inode) 1413 #define stat_dec_inline_inode(inode) 1414 #define stat_inc_seg_type(sbi, curseg) 1415 #define stat_inc_block_count(sbi, curseg) 1416 #define stat_inc_seg_count(si, type) 1417 #define stat_inc_tot_blk_count(si, blks) 1418 #define stat_inc_data_blk_count(si, blks) 1419 #define stat_inc_node_blk_count(sbi, blks) 1420 1421 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1422 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1423 static inline void __init f2fs_create_root_stats(void) { } 1424 static inline void f2fs_destroy_root_stats(void) { } 1425 #endif 1426 1427 extern const struct file_operations f2fs_dir_operations; 1428 extern const struct file_operations f2fs_file_operations; 1429 extern const struct inode_operations f2fs_file_inode_operations; 1430 extern const struct address_space_operations f2fs_dblock_aops; 1431 extern const struct address_space_operations f2fs_node_aops; 1432 extern const struct address_space_operations f2fs_meta_aops; 1433 extern const struct inode_operations f2fs_dir_inode_operations; 1434 extern const struct inode_operations f2fs_symlink_inode_operations; 1435 extern const struct inode_operations f2fs_special_inode_operations; 1436 1437 /* 1438 * inline.c 1439 */ 1440 bool f2fs_may_inline(struct inode *); 1441 int f2fs_read_inline_data(struct inode *, struct page *); 1442 int f2fs_convert_inline_data(struct inode *, pgoff_t); 1443 int f2fs_write_inline_data(struct inode *, struct page *, unsigned int); 1444 void truncate_inline_data(struct inode *, u64); 1445 int recover_inline_data(struct inode *, struct page *); 1446 #endif 1447