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