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