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(sbi, condition) BUG_ON(condition) 25 #define f2fs_down_write(x, y) down_write_nest_lock(x, y) 26 #else 27 #define f2fs_bug_on(sbi, condition) \ 28 do { \ 29 if (unlikely(condition)) { \ 30 WARN_ON(1); \ 31 sbi->need_fsck = true; \ 32 } \ 33 } while (0) 34 #define f2fs_down_write(x, y) down_write(x) 35 #endif 36 37 /* 38 * For mount options 39 */ 40 #define F2FS_MOUNT_BG_GC 0x00000001 41 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 42 #define F2FS_MOUNT_DISCARD 0x00000004 43 #define F2FS_MOUNT_NOHEAP 0x00000008 44 #define F2FS_MOUNT_XATTR_USER 0x00000010 45 #define F2FS_MOUNT_POSIX_ACL 0x00000020 46 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 47 #define F2FS_MOUNT_INLINE_XATTR 0x00000080 48 #define F2FS_MOUNT_INLINE_DATA 0x00000100 49 #define F2FS_MOUNT_INLINE_DENTRY 0x00000200 50 #define F2FS_MOUNT_FLUSH_MERGE 0x00000400 51 #define F2FS_MOUNT_NOBARRIER 0x00000800 52 53 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) 54 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) 55 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) 56 57 #define ver_after(a, b) (typecheck(unsigned long long, a) && \ 58 typecheck(unsigned long long, b) && \ 59 ((long long)((a) - (b)) > 0)) 60 61 typedef u32 block_t; /* 62 * should not change u32, since it is the on-disk block 63 * address format, __le32. 64 */ 65 typedef u32 nid_t; 66 67 struct f2fs_mount_info { 68 unsigned int opt; 69 }; 70 71 #define CRCPOLY_LE 0xedb88320 72 73 static inline __u32 f2fs_crc32(void *buf, size_t len) 74 { 75 unsigned char *p = (unsigned char *)buf; 76 __u32 crc = F2FS_SUPER_MAGIC; 77 int i; 78 79 while (len--) { 80 crc ^= *p++; 81 for (i = 0; i < 8; i++) 82 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); 83 } 84 return crc; 85 } 86 87 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size) 88 { 89 return f2fs_crc32(buf, buf_size) == blk_crc; 90 } 91 92 /* 93 * For checkpoint manager 94 */ 95 enum { 96 NAT_BITMAP, 97 SIT_BITMAP 98 }; 99 100 enum { 101 CP_UMOUNT, 102 CP_SYNC, 103 CP_DISCARD, 104 }; 105 106 struct cp_control { 107 int reason; 108 __u64 trim_start; 109 __u64 trim_end; 110 __u64 trim_minlen; 111 __u64 trimmed; 112 }; 113 114 /* 115 * For CP/NAT/SIT/SSA readahead 116 */ 117 enum { 118 META_CP, 119 META_NAT, 120 META_SIT, 121 META_SSA, 122 META_POR, 123 }; 124 125 /* for the list of ino */ 126 enum { 127 ORPHAN_INO, /* for orphan ino list */ 128 APPEND_INO, /* for append ino list */ 129 UPDATE_INO, /* for update ino list */ 130 MAX_INO_ENTRY, /* max. list */ 131 }; 132 133 struct ino_entry { 134 struct list_head list; /* list head */ 135 nid_t ino; /* inode number */ 136 }; 137 138 /* for the list of directory inodes */ 139 struct dir_inode_entry { 140 struct list_head list; /* list head */ 141 struct inode *inode; /* vfs inode pointer */ 142 }; 143 144 /* for the list of blockaddresses to be discarded */ 145 struct discard_entry { 146 struct list_head list; /* list head */ 147 block_t blkaddr; /* block address to be discarded */ 148 int len; /* # of consecutive blocks of the discard */ 149 }; 150 151 /* for the list of fsync inodes, used only during recovery */ 152 struct fsync_inode_entry { 153 struct list_head list; /* list head */ 154 struct inode *inode; /* vfs inode pointer */ 155 block_t blkaddr; /* block address locating the last fsync */ 156 block_t last_dentry; /* block address locating the last dentry */ 157 block_t last_inode; /* block address locating the last inode */ 158 }; 159 160 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) 161 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) 162 163 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) 164 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) 165 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) 166 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) 167 168 #define MAX_NAT_JENTRIES(sum) (NAT_JOURNAL_ENTRIES - nats_in_cursum(sum)) 169 #define MAX_SIT_JENTRIES(sum) (SIT_JOURNAL_ENTRIES - sits_in_cursum(sum)) 170 171 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) 172 { 173 int before = nats_in_cursum(rs); 174 rs->n_nats = cpu_to_le16(before + i); 175 return before; 176 } 177 178 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) 179 { 180 int before = sits_in_cursum(rs); 181 rs->n_sits = cpu_to_le16(before + i); 182 return before; 183 } 184 185 static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size, 186 int type) 187 { 188 if (type == NAT_JOURNAL) 189 return size <= MAX_NAT_JENTRIES(sum); 190 return size <= MAX_SIT_JENTRIES(sum); 191 } 192 193 /* 194 * ioctl commands 195 */ 196 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS 197 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS 198 199 #define F2FS_IOCTL_MAGIC 0xf5 200 #define F2FS_IOC_START_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 1) 201 #define F2FS_IOC_COMMIT_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 2) 202 #define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3) 203 204 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 205 /* 206 * ioctl commands in 32 bit emulation 207 */ 208 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS 209 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS 210 #endif 211 212 /* 213 * For INODE and NODE manager 214 */ 215 /* for directory operations */ 216 struct f2fs_dentry_ptr { 217 const void *bitmap; 218 struct f2fs_dir_entry *dentry; 219 __u8 (*filename)[F2FS_SLOT_LEN]; 220 int max; 221 }; 222 223 static inline void make_dentry_ptr(struct f2fs_dentry_ptr *d, 224 void *src, int type) 225 { 226 if (type == 1) { 227 struct f2fs_dentry_block *t = (struct f2fs_dentry_block *)src; 228 d->max = NR_DENTRY_IN_BLOCK; 229 d->bitmap = &t->dentry_bitmap; 230 d->dentry = t->dentry; 231 d->filename = t->filename; 232 } else { 233 struct f2fs_inline_dentry *t = (struct f2fs_inline_dentry *)src; 234 d->max = NR_INLINE_DENTRY; 235 d->bitmap = &t->dentry_bitmap; 236 d->dentry = t->dentry; 237 d->filename = t->filename; 238 } 239 } 240 241 /* 242 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 243 * as its node offset to distinguish from index node blocks. 244 * But some bits are used to mark the node block. 245 */ 246 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ 247 >> OFFSET_BIT_SHIFT) 248 enum { 249 ALLOC_NODE, /* allocate a new node page if needed */ 250 LOOKUP_NODE, /* look up a node without readahead */ 251 LOOKUP_NODE_RA, /* 252 * look up a node with readahead called 253 * by get_data_block. 254 */ 255 }; 256 257 #define F2FS_LINK_MAX 32000 /* maximum link count per file */ 258 259 #define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */ 260 261 /* for in-memory extent cache entry */ 262 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */ 263 264 struct extent_info { 265 rwlock_t ext_lock; /* rwlock for consistency */ 266 unsigned int fofs; /* start offset in a file */ 267 u32 blk_addr; /* start block address of the extent */ 268 unsigned int len; /* length of the extent */ 269 }; 270 271 /* 272 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. 273 */ 274 #define FADVISE_COLD_BIT 0x01 275 #define FADVISE_LOST_PINO_BIT 0x02 276 277 #define DEF_DIR_LEVEL 0 278 279 struct f2fs_inode_info { 280 struct inode vfs_inode; /* serve a vfs inode */ 281 unsigned long i_flags; /* keep an inode flags for ioctl */ 282 unsigned char i_advise; /* use to give file attribute hints */ 283 unsigned char i_dir_level; /* use for dentry level for large dir */ 284 unsigned int i_current_depth; /* use only in directory structure */ 285 unsigned int i_pino; /* parent inode number */ 286 umode_t i_acl_mode; /* keep file acl mode temporarily */ 287 288 /* Use below internally in f2fs*/ 289 unsigned long flags; /* use to pass per-file flags */ 290 struct rw_semaphore i_sem; /* protect fi info */ 291 atomic_t dirty_pages; /* # of dirty pages */ 292 f2fs_hash_t chash; /* hash value of given file name */ 293 unsigned int clevel; /* maximum level of given file name */ 294 nid_t i_xattr_nid; /* node id that contains xattrs */ 295 unsigned long long xattr_ver; /* cp version of xattr modification */ 296 struct extent_info ext; /* in-memory extent cache entry */ 297 struct dir_inode_entry *dirty_dir; /* the pointer of dirty dir */ 298 299 struct radix_tree_root inmem_root; /* radix tree for inmem pages */ 300 struct list_head inmem_pages; /* inmemory pages managed by f2fs */ 301 struct mutex inmem_lock; /* lock for inmemory pages */ 302 }; 303 304 static inline void get_extent_info(struct extent_info *ext, 305 struct f2fs_extent i_ext) 306 { 307 write_lock(&ext->ext_lock); 308 ext->fofs = le32_to_cpu(i_ext.fofs); 309 ext->blk_addr = le32_to_cpu(i_ext.blk_addr); 310 ext->len = le32_to_cpu(i_ext.len); 311 write_unlock(&ext->ext_lock); 312 } 313 314 static inline void set_raw_extent(struct extent_info *ext, 315 struct f2fs_extent *i_ext) 316 { 317 read_lock(&ext->ext_lock); 318 i_ext->fofs = cpu_to_le32(ext->fofs); 319 i_ext->blk_addr = cpu_to_le32(ext->blk_addr); 320 i_ext->len = cpu_to_le32(ext->len); 321 read_unlock(&ext->ext_lock); 322 } 323 324 struct f2fs_nm_info { 325 block_t nat_blkaddr; /* base disk address of NAT */ 326 nid_t max_nid; /* maximum possible node ids */ 327 nid_t available_nids; /* maximum available node ids */ 328 nid_t next_scan_nid; /* the next nid to be scanned */ 329 unsigned int ram_thresh; /* control the memory footprint */ 330 331 /* NAT cache management */ 332 struct radix_tree_root nat_root;/* root of the nat entry cache */ 333 struct radix_tree_root nat_set_root;/* root of the nat set cache */ 334 rwlock_t nat_tree_lock; /* protect nat_tree_lock */ 335 struct list_head nat_entries; /* cached nat entry list (clean) */ 336 unsigned int nat_cnt; /* the # of cached nat entries */ 337 unsigned int dirty_nat_cnt; /* total num of nat entries in set */ 338 339 /* free node ids management */ 340 struct radix_tree_root free_nid_root;/* root of the free_nid cache */ 341 struct list_head free_nid_list; /* a list for free nids */ 342 spinlock_t free_nid_list_lock; /* protect free nid list */ 343 unsigned int fcnt; /* the number of free node id */ 344 struct mutex build_lock; /* lock for build free nids */ 345 346 /* for checkpoint */ 347 char *nat_bitmap; /* NAT bitmap pointer */ 348 int bitmap_size; /* bitmap size */ 349 }; 350 351 /* 352 * this structure is used as one of function parameters. 353 * all the information are dedicated to a given direct node block determined 354 * by the data offset in a file. 355 */ 356 struct dnode_of_data { 357 struct inode *inode; /* vfs inode pointer */ 358 struct page *inode_page; /* its inode page, NULL is possible */ 359 struct page *node_page; /* cached direct node page */ 360 nid_t nid; /* node id of the direct node block */ 361 unsigned int ofs_in_node; /* data offset in the node page */ 362 bool inode_page_locked; /* inode page is locked or not */ 363 block_t data_blkaddr; /* block address of the node block */ 364 }; 365 366 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, 367 struct page *ipage, struct page *npage, nid_t nid) 368 { 369 memset(dn, 0, sizeof(*dn)); 370 dn->inode = inode; 371 dn->inode_page = ipage; 372 dn->node_page = npage; 373 dn->nid = nid; 374 } 375 376 /* 377 * For SIT manager 378 * 379 * By default, there are 6 active log areas across the whole main area. 380 * When considering hot and cold data separation to reduce cleaning overhead, 381 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, 382 * respectively. 383 * In the current design, you should not change the numbers intentionally. 384 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 385 * logs individually according to the underlying devices. (default: 6) 386 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for 387 * data and 8 for node logs. 388 */ 389 #define NR_CURSEG_DATA_TYPE (3) 390 #define NR_CURSEG_NODE_TYPE (3) 391 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 392 393 enum { 394 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 395 CURSEG_WARM_DATA, /* data blocks */ 396 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 397 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 398 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 399 CURSEG_COLD_NODE, /* indirect node blocks */ 400 NO_CHECK_TYPE 401 }; 402 403 struct flush_cmd { 404 struct completion wait; 405 struct llist_node llnode; 406 int ret; 407 }; 408 409 struct flush_cmd_control { 410 struct task_struct *f2fs_issue_flush; /* flush thread */ 411 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */ 412 struct llist_head issue_list; /* list for command issue */ 413 struct llist_node *dispatch_list; /* list for command dispatch */ 414 }; 415 416 struct f2fs_sm_info { 417 struct sit_info *sit_info; /* whole segment information */ 418 struct free_segmap_info *free_info; /* free segment information */ 419 struct dirty_seglist_info *dirty_info; /* dirty segment information */ 420 struct curseg_info *curseg_array; /* active segment information */ 421 422 block_t seg0_blkaddr; /* block address of 0'th segment */ 423 block_t main_blkaddr; /* start block address of main area */ 424 block_t ssa_blkaddr; /* start block address of SSA area */ 425 426 unsigned int segment_count; /* total # of segments */ 427 unsigned int main_segments; /* # of segments in main area */ 428 unsigned int reserved_segments; /* # of reserved segments */ 429 unsigned int ovp_segments; /* # of overprovision segments */ 430 431 /* a threshold to reclaim prefree segments */ 432 unsigned int rec_prefree_segments; 433 434 /* for small discard management */ 435 struct list_head discard_list; /* 4KB discard list */ 436 int nr_discards; /* # of discards in the list */ 437 int max_discards; /* max. discards to be issued */ 438 439 struct list_head sit_entry_set; /* sit entry set list */ 440 441 unsigned int ipu_policy; /* in-place-update policy */ 442 unsigned int min_ipu_util; /* in-place-update threshold */ 443 unsigned int min_fsync_blocks; /* threshold for fsync */ 444 445 /* for flush command control */ 446 struct flush_cmd_control *cmd_control_info; 447 448 }; 449 450 /* 451 * For superblock 452 */ 453 /* 454 * COUNT_TYPE for monitoring 455 * 456 * f2fs monitors the number of several block types such as on-writeback, 457 * dirty dentry blocks, dirty node blocks, and dirty meta blocks. 458 */ 459 enum count_type { 460 F2FS_WRITEBACK, 461 F2FS_DIRTY_DENTS, 462 F2FS_DIRTY_NODES, 463 F2FS_DIRTY_META, 464 NR_COUNT_TYPE, 465 }; 466 467 /* 468 * The below are the page types of bios used in submit_bio(). 469 * The available types are: 470 * DATA User data pages. It operates as async mode. 471 * NODE Node pages. It operates as async mode. 472 * META FS metadata pages such as SIT, NAT, CP. 473 * NR_PAGE_TYPE The number of page types. 474 * META_FLUSH Make sure the previous pages are written 475 * with waiting the bio's completion 476 * ... Only can be used with META. 477 */ 478 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type)) 479 enum page_type { 480 DATA, 481 NODE, 482 META, 483 NR_PAGE_TYPE, 484 META_FLUSH, 485 }; 486 487 struct f2fs_io_info { 488 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ 489 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */ 490 }; 491 492 #define is_read_io(rw) (((rw) & 1) == READ) 493 struct f2fs_bio_info { 494 struct f2fs_sb_info *sbi; /* f2fs superblock */ 495 struct bio *bio; /* bios to merge */ 496 sector_t last_block_in_bio; /* last block number */ 497 struct f2fs_io_info fio; /* store buffered io info. */ 498 struct rw_semaphore io_rwsem; /* blocking op for bio */ 499 }; 500 501 struct f2fs_sb_info { 502 struct super_block *sb; /* pointer to VFS super block */ 503 struct proc_dir_entry *s_proc; /* proc entry */ 504 struct buffer_head *raw_super_buf; /* buffer head of raw sb */ 505 struct f2fs_super_block *raw_super; /* raw super block pointer */ 506 int s_dirty; /* dirty flag for checkpoint */ 507 bool need_fsck; /* need fsck.f2fs to fix */ 508 509 /* for node-related operations */ 510 struct f2fs_nm_info *nm_info; /* node manager */ 511 struct inode *node_inode; /* cache node blocks */ 512 513 /* for segment-related operations */ 514 struct f2fs_sm_info *sm_info; /* segment manager */ 515 516 /* for bio operations */ 517 struct f2fs_bio_info read_io; /* for read bios */ 518 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */ 519 struct completion *wait_io; /* for completion bios */ 520 521 /* for checkpoint */ 522 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ 523 struct inode *meta_inode; /* cache meta blocks */ 524 struct mutex cp_mutex; /* checkpoint procedure lock */ 525 struct rw_semaphore cp_rwsem; /* blocking FS operations */ 526 struct rw_semaphore node_write; /* locking node writes */ 527 struct mutex writepages; /* mutex for writepages() */ 528 bool por_doing; /* recovery is doing or not */ 529 wait_queue_head_t cp_wait; 530 531 /* for inode management */ 532 struct radix_tree_root ino_root[MAX_INO_ENTRY]; /* ino entry array */ 533 spinlock_t ino_lock[MAX_INO_ENTRY]; /* for ino entry lock */ 534 struct list_head ino_list[MAX_INO_ENTRY]; /* inode list head */ 535 536 /* for orphan inode, use 0'th array */ 537 unsigned int n_orphans; /* # of orphan inodes */ 538 unsigned int max_orphans; /* max orphan inodes */ 539 540 /* for directory inode management */ 541 struct list_head dir_inode_list; /* dir inode list */ 542 spinlock_t dir_inode_lock; /* for dir inode list lock */ 543 544 /* basic filesystem units */ 545 unsigned int log_sectors_per_block; /* log2 sectors per block */ 546 unsigned int log_blocksize; /* log2 block size */ 547 unsigned int blocksize; /* block size */ 548 unsigned int root_ino_num; /* root inode number*/ 549 unsigned int node_ino_num; /* node inode number*/ 550 unsigned int meta_ino_num; /* meta inode number*/ 551 unsigned int log_blocks_per_seg; /* log2 blocks per segment */ 552 unsigned int blocks_per_seg; /* blocks per segment */ 553 unsigned int segs_per_sec; /* segments per section */ 554 unsigned int secs_per_zone; /* sections per zone */ 555 unsigned int total_sections; /* total section count */ 556 unsigned int total_node_count; /* total node block count */ 557 unsigned int total_valid_node_count; /* valid node block count */ 558 unsigned int total_valid_inode_count; /* valid inode count */ 559 int active_logs; /* # of active logs */ 560 int dir_level; /* directory level */ 561 562 block_t user_block_count; /* # of user blocks */ 563 block_t total_valid_block_count; /* # of valid blocks */ 564 block_t alloc_valid_block_count; /* # of allocated blocks */ 565 block_t last_valid_block_count; /* for recovery */ 566 u32 s_next_generation; /* for NFS support */ 567 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ 568 569 struct f2fs_mount_info mount_opt; /* mount options */ 570 571 /* for cleaning operations */ 572 struct mutex gc_mutex; /* mutex for GC */ 573 struct f2fs_gc_kthread *gc_thread; /* GC thread */ 574 unsigned int cur_victim_sec; /* current victim section num */ 575 576 /* maximum # of trials to find a victim segment for SSR and GC */ 577 unsigned int max_victim_search; 578 579 /* 580 * for stat information. 581 * one is for the LFS mode, and the other is for the SSR mode. 582 */ 583 #ifdef CONFIG_F2FS_STAT_FS 584 struct f2fs_stat_info *stat_info; /* FS status information */ 585 unsigned int segment_count[2]; /* # of allocated segments */ 586 unsigned int block_count[2]; /* # of allocated blocks */ 587 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ 588 int inline_inode; /* # of inline_data inodes */ 589 int inline_dir; /* # of inline_dentry inodes */ 590 int bg_gc; /* background gc calls */ 591 unsigned int n_dirty_dirs; /* # of dir inodes */ 592 #endif 593 unsigned int last_victim[2]; /* last victim segment # */ 594 spinlock_t stat_lock; /* lock for stat operations */ 595 596 /* For sysfs suppport */ 597 struct kobject s_kobj; 598 struct completion s_kobj_unregister; 599 }; 600 601 /* 602 * Inline functions 603 */ 604 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) 605 { 606 return container_of(inode, struct f2fs_inode_info, vfs_inode); 607 } 608 609 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) 610 { 611 return sb->s_fs_info; 612 } 613 614 static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode) 615 { 616 return F2FS_SB(inode->i_sb); 617 } 618 619 static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping) 620 { 621 return F2FS_I_SB(mapping->host); 622 } 623 624 static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page) 625 { 626 return F2FS_M_SB(page->mapping); 627 } 628 629 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) 630 { 631 return (struct f2fs_super_block *)(sbi->raw_super); 632 } 633 634 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) 635 { 636 return (struct f2fs_checkpoint *)(sbi->ckpt); 637 } 638 639 static inline struct f2fs_node *F2FS_NODE(struct page *page) 640 { 641 return (struct f2fs_node *)page_address(page); 642 } 643 644 static inline struct f2fs_inode *F2FS_INODE(struct page *page) 645 { 646 return &((struct f2fs_node *)page_address(page))->i; 647 } 648 649 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) 650 { 651 return (struct f2fs_nm_info *)(sbi->nm_info); 652 } 653 654 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) 655 { 656 return (struct f2fs_sm_info *)(sbi->sm_info); 657 } 658 659 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) 660 { 661 return (struct sit_info *)(SM_I(sbi)->sit_info); 662 } 663 664 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) 665 { 666 return (struct free_segmap_info *)(SM_I(sbi)->free_info); 667 } 668 669 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) 670 { 671 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); 672 } 673 674 static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi) 675 { 676 return sbi->meta_inode->i_mapping; 677 } 678 679 static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi) 680 { 681 return sbi->node_inode->i_mapping; 682 } 683 684 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) 685 { 686 sbi->s_dirty = 1; 687 } 688 689 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) 690 { 691 sbi->s_dirty = 0; 692 } 693 694 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp) 695 { 696 return le64_to_cpu(cp->checkpoint_ver); 697 } 698 699 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 700 { 701 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 702 return ckpt_flags & f; 703 } 704 705 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 706 { 707 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 708 ckpt_flags |= f; 709 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 710 } 711 712 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) 713 { 714 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); 715 ckpt_flags &= (~f); 716 cp->ckpt_flags = cpu_to_le32(ckpt_flags); 717 } 718 719 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 720 { 721 down_read(&sbi->cp_rwsem); 722 } 723 724 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi) 725 { 726 up_read(&sbi->cp_rwsem); 727 } 728 729 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi) 730 { 731 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex); 732 } 733 734 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 735 { 736 up_write(&sbi->cp_rwsem); 737 } 738 739 /* 740 * Check whether the given nid is within node id range. 741 */ 742 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) 743 { 744 if (unlikely(nid < F2FS_ROOT_INO(sbi))) 745 return -EINVAL; 746 if (unlikely(nid >= NM_I(sbi)->max_nid)) 747 return -EINVAL; 748 return 0; 749 } 750 751 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 752 753 /* 754 * Check whether the inode has blocks or not 755 */ 756 static inline int F2FS_HAS_BLOCKS(struct inode *inode) 757 { 758 if (F2FS_I(inode)->i_xattr_nid) 759 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1; 760 else 761 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS; 762 } 763 764 static inline bool f2fs_has_xattr_block(unsigned int ofs) 765 { 766 return ofs == XATTR_NODE_OFFSET; 767 } 768 769 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, 770 struct inode *inode, blkcnt_t count) 771 { 772 block_t valid_block_count; 773 774 spin_lock(&sbi->stat_lock); 775 valid_block_count = 776 sbi->total_valid_block_count + (block_t)count; 777 if (unlikely(valid_block_count > sbi->user_block_count)) { 778 spin_unlock(&sbi->stat_lock); 779 return false; 780 } 781 inode->i_blocks += count; 782 sbi->total_valid_block_count = valid_block_count; 783 sbi->alloc_valid_block_count += (block_t)count; 784 spin_unlock(&sbi->stat_lock); 785 return true; 786 } 787 788 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi, 789 struct inode *inode, 790 blkcnt_t count) 791 { 792 spin_lock(&sbi->stat_lock); 793 f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count); 794 f2fs_bug_on(sbi, inode->i_blocks < count); 795 inode->i_blocks -= count; 796 sbi->total_valid_block_count -= (block_t)count; 797 spin_unlock(&sbi->stat_lock); 798 } 799 800 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) 801 { 802 atomic_inc(&sbi->nr_pages[count_type]); 803 F2FS_SET_SB_DIRT(sbi); 804 } 805 806 static inline void inode_inc_dirty_pages(struct inode *inode) 807 { 808 atomic_inc(&F2FS_I(inode)->dirty_pages); 809 if (S_ISDIR(inode->i_mode)) 810 inc_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS); 811 } 812 813 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) 814 { 815 atomic_dec(&sbi->nr_pages[count_type]); 816 } 817 818 static inline void inode_dec_dirty_pages(struct inode *inode) 819 { 820 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)) 821 return; 822 823 atomic_dec(&F2FS_I(inode)->dirty_pages); 824 825 if (S_ISDIR(inode->i_mode)) 826 dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS); 827 } 828 829 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) 830 { 831 return atomic_read(&sbi->nr_pages[count_type]); 832 } 833 834 static inline int get_dirty_pages(struct inode *inode) 835 { 836 return atomic_read(&F2FS_I(inode)->dirty_pages); 837 } 838 839 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type) 840 { 841 unsigned int pages_per_sec = sbi->segs_per_sec * 842 (1 << sbi->log_blocks_per_seg); 843 return ((get_pages(sbi, block_type) + pages_per_sec - 1) 844 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; 845 } 846 847 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) 848 { 849 return sbi->total_valid_block_count; 850 } 851 852 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) 853 { 854 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 855 856 /* return NAT or SIT bitmap */ 857 if (flag == NAT_BITMAP) 858 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); 859 else if (flag == SIT_BITMAP) 860 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); 861 862 return 0; 863 } 864 865 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) 866 { 867 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 868 int offset; 869 870 if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) { 871 if (flag == NAT_BITMAP) 872 return &ckpt->sit_nat_version_bitmap; 873 else 874 return (unsigned char *)ckpt + F2FS_BLKSIZE; 875 } else { 876 offset = (flag == NAT_BITMAP) ? 877 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; 878 return &ckpt->sit_nat_version_bitmap + offset; 879 } 880 } 881 882 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) 883 { 884 block_t start_addr; 885 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); 886 unsigned long long ckpt_version = cur_cp_version(ckpt); 887 888 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); 889 890 /* 891 * odd numbered checkpoint should at cp segment 0 892 * and even segment must be at cp segment 1 893 */ 894 if (!(ckpt_version & 1)) 895 start_addr += sbi->blocks_per_seg; 896 897 return start_addr; 898 } 899 900 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) 901 { 902 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); 903 } 904 905 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, 906 struct inode *inode) 907 { 908 block_t valid_block_count; 909 unsigned int valid_node_count; 910 911 spin_lock(&sbi->stat_lock); 912 913 valid_block_count = sbi->total_valid_block_count + 1; 914 if (unlikely(valid_block_count > sbi->user_block_count)) { 915 spin_unlock(&sbi->stat_lock); 916 return false; 917 } 918 919 valid_node_count = sbi->total_valid_node_count + 1; 920 if (unlikely(valid_node_count > sbi->total_node_count)) { 921 spin_unlock(&sbi->stat_lock); 922 return false; 923 } 924 925 if (inode) 926 inode->i_blocks++; 927 928 sbi->alloc_valid_block_count++; 929 sbi->total_valid_node_count++; 930 sbi->total_valid_block_count++; 931 spin_unlock(&sbi->stat_lock); 932 933 return true; 934 } 935 936 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, 937 struct inode *inode) 938 { 939 spin_lock(&sbi->stat_lock); 940 941 f2fs_bug_on(sbi, !sbi->total_valid_block_count); 942 f2fs_bug_on(sbi, !sbi->total_valid_node_count); 943 f2fs_bug_on(sbi, !inode->i_blocks); 944 945 inode->i_blocks--; 946 sbi->total_valid_node_count--; 947 sbi->total_valid_block_count--; 948 949 spin_unlock(&sbi->stat_lock); 950 } 951 952 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) 953 { 954 return sbi->total_valid_node_count; 955 } 956 957 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) 958 { 959 spin_lock(&sbi->stat_lock); 960 f2fs_bug_on(sbi, sbi->total_valid_inode_count == sbi->total_node_count); 961 sbi->total_valid_inode_count++; 962 spin_unlock(&sbi->stat_lock); 963 } 964 965 static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi) 966 { 967 spin_lock(&sbi->stat_lock); 968 f2fs_bug_on(sbi, !sbi->total_valid_inode_count); 969 sbi->total_valid_inode_count--; 970 spin_unlock(&sbi->stat_lock); 971 } 972 973 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) 974 { 975 return sbi->total_valid_inode_count; 976 } 977 978 static inline void f2fs_put_page(struct page *page, int unlock) 979 { 980 if (!page) 981 return; 982 983 if (unlock) { 984 f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page)); 985 unlock_page(page); 986 } 987 page_cache_release(page); 988 } 989 990 static inline void f2fs_put_dnode(struct dnode_of_data *dn) 991 { 992 if (dn->node_page) 993 f2fs_put_page(dn->node_page, 1); 994 if (dn->inode_page && dn->node_page != dn->inode_page) 995 f2fs_put_page(dn->inode_page, 0); 996 dn->node_page = NULL; 997 dn->inode_page = NULL; 998 } 999 1000 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, 1001 size_t size) 1002 { 1003 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL); 1004 } 1005 1006 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 1007 gfp_t flags) 1008 { 1009 void *entry; 1010 retry: 1011 entry = kmem_cache_alloc(cachep, flags); 1012 if (!entry) { 1013 cond_resched(); 1014 goto retry; 1015 } 1016 1017 return entry; 1018 } 1019 1020 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) 1021 1022 static inline bool IS_INODE(struct page *page) 1023 { 1024 struct f2fs_node *p = F2FS_NODE(page); 1025 return RAW_IS_INODE(p); 1026 } 1027 1028 static inline __le32 *blkaddr_in_node(struct f2fs_node *node) 1029 { 1030 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; 1031 } 1032 1033 static inline block_t datablock_addr(struct page *node_page, 1034 unsigned int offset) 1035 { 1036 struct f2fs_node *raw_node; 1037 __le32 *addr_array; 1038 raw_node = F2FS_NODE(node_page); 1039 addr_array = blkaddr_in_node(raw_node); 1040 return le32_to_cpu(addr_array[offset]); 1041 } 1042 1043 static inline int f2fs_test_bit(unsigned int nr, char *addr) 1044 { 1045 int mask; 1046 1047 addr += (nr >> 3); 1048 mask = 1 << (7 - (nr & 0x07)); 1049 return mask & *addr; 1050 } 1051 1052 static inline int f2fs_set_bit(unsigned int nr, char *addr) 1053 { 1054 int mask; 1055 int ret; 1056 1057 addr += (nr >> 3); 1058 mask = 1 << (7 - (nr & 0x07)); 1059 ret = mask & *addr; 1060 *addr |= mask; 1061 return ret; 1062 } 1063 1064 static inline int f2fs_clear_bit(unsigned int nr, char *addr) 1065 { 1066 int mask; 1067 int ret; 1068 1069 addr += (nr >> 3); 1070 mask = 1 << (7 - (nr & 0x07)); 1071 ret = mask & *addr; 1072 *addr &= ~mask; 1073 return ret; 1074 } 1075 1076 static inline void f2fs_change_bit(unsigned int nr, char *addr) 1077 { 1078 int mask; 1079 1080 addr += (nr >> 3); 1081 mask = 1 << (7 - (nr & 0x07)); 1082 *addr ^= mask; 1083 } 1084 1085 /* used for f2fs_inode_info->flags */ 1086 enum { 1087 FI_NEW_INODE, /* indicate newly allocated inode */ 1088 FI_DIRTY_INODE, /* indicate inode is dirty or not */ 1089 FI_DIRTY_DIR, /* indicate directory has dirty pages */ 1090 FI_INC_LINK, /* need to increment i_nlink */ 1091 FI_ACL_MODE, /* indicate acl mode */ 1092 FI_NO_ALLOC, /* should not allocate any blocks */ 1093 FI_UPDATE_DIR, /* should update inode block for consistency */ 1094 FI_DELAY_IPUT, /* used for the recovery */ 1095 FI_NO_EXTENT, /* not to use the extent cache */ 1096 FI_INLINE_XATTR, /* used for inline xattr */ 1097 FI_INLINE_DATA, /* used for inline data*/ 1098 FI_INLINE_DENTRY, /* used for inline dentry */ 1099 FI_APPEND_WRITE, /* inode has appended data */ 1100 FI_UPDATE_WRITE, /* inode has in-place-update data */ 1101 FI_NEED_IPU, /* used for ipu per file */ 1102 FI_ATOMIC_FILE, /* indicate atomic file */ 1103 FI_VOLATILE_FILE, /* indicate volatile file */ 1104 }; 1105 1106 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) 1107 { 1108 if (!test_bit(flag, &fi->flags)) 1109 set_bit(flag, &fi->flags); 1110 } 1111 1112 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) 1113 { 1114 return test_bit(flag, &fi->flags); 1115 } 1116 1117 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) 1118 { 1119 if (test_bit(flag, &fi->flags)) 1120 clear_bit(flag, &fi->flags); 1121 } 1122 1123 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) 1124 { 1125 fi->i_acl_mode = mode; 1126 set_inode_flag(fi, FI_ACL_MODE); 1127 } 1128 1129 static inline void get_inline_info(struct f2fs_inode_info *fi, 1130 struct f2fs_inode *ri) 1131 { 1132 if (ri->i_inline & F2FS_INLINE_XATTR) 1133 set_inode_flag(fi, FI_INLINE_XATTR); 1134 if (ri->i_inline & F2FS_INLINE_DATA) 1135 set_inode_flag(fi, FI_INLINE_DATA); 1136 if (ri->i_inline & F2FS_INLINE_DENTRY) 1137 set_inode_flag(fi, FI_INLINE_DENTRY); 1138 } 1139 1140 static inline void set_raw_inline(struct f2fs_inode_info *fi, 1141 struct f2fs_inode *ri) 1142 { 1143 ri->i_inline = 0; 1144 1145 if (is_inode_flag_set(fi, FI_INLINE_XATTR)) 1146 ri->i_inline |= F2FS_INLINE_XATTR; 1147 if (is_inode_flag_set(fi, FI_INLINE_DATA)) 1148 ri->i_inline |= F2FS_INLINE_DATA; 1149 if (is_inode_flag_set(fi, FI_INLINE_DENTRY)) 1150 ri->i_inline |= F2FS_INLINE_DENTRY; 1151 } 1152 1153 static inline int f2fs_has_inline_xattr(struct inode *inode) 1154 { 1155 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR); 1156 } 1157 1158 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi) 1159 { 1160 if (f2fs_has_inline_xattr(&fi->vfs_inode)) 1161 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS; 1162 return DEF_ADDRS_PER_INODE; 1163 } 1164 1165 static inline void *inline_xattr_addr(struct page *page) 1166 { 1167 struct f2fs_inode *ri = F2FS_INODE(page); 1168 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE - 1169 F2FS_INLINE_XATTR_ADDRS]); 1170 } 1171 1172 static inline int inline_xattr_size(struct inode *inode) 1173 { 1174 if (f2fs_has_inline_xattr(inode)) 1175 return F2FS_INLINE_XATTR_ADDRS << 2; 1176 else 1177 return 0; 1178 } 1179 1180 static inline int f2fs_has_inline_data(struct inode *inode) 1181 { 1182 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA); 1183 } 1184 1185 static inline bool f2fs_is_atomic_file(struct inode *inode) 1186 { 1187 return is_inode_flag_set(F2FS_I(inode), FI_ATOMIC_FILE); 1188 } 1189 1190 static inline bool f2fs_is_volatile_file(struct inode *inode) 1191 { 1192 return is_inode_flag_set(F2FS_I(inode), FI_VOLATILE_FILE); 1193 } 1194 1195 static inline void *inline_data_addr(struct page *page) 1196 { 1197 struct f2fs_inode *ri = F2FS_INODE(page); 1198 return (void *)&(ri->i_addr[1]); 1199 } 1200 1201 static inline int f2fs_has_inline_dentry(struct inode *inode) 1202 { 1203 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DENTRY); 1204 } 1205 1206 static inline void *inline_dentry_addr(struct page *page) 1207 { 1208 struct f2fs_inode *ri = F2FS_INODE(page); 1209 return (void *)&(ri->i_addr[1]); 1210 } 1211 1212 static inline int f2fs_readonly(struct super_block *sb) 1213 { 1214 return sb->s_flags & MS_RDONLY; 1215 } 1216 1217 static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi) 1218 { 1219 return is_set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); 1220 } 1221 1222 static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi) 1223 { 1224 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); 1225 sbi->sb->s_flags |= MS_RDONLY; 1226 } 1227 1228 #define get_inode_mode(i) \ 1229 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \ 1230 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode)) 1231 1232 /* get offset of first page in next direct node */ 1233 #define PGOFS_OF_NEXT_DNODE(pgofs, fi) \ 1234 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \ 1235 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \ 1236 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi)) 1237 1238 /* 1239 * file.c 1240 */ 1241 int f2fs_sync_file(struct file *, loff_t, loff_t, int); 1242 void truncate_data_blocks(struct dnode_of_data *); 1243 int truncate_blocks(struct inode *, u64, bool); 1244 void f2fs_truncate(struct inode *); 1245 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 1246 int f2fs_setattr(struct dentry *, struct iattr *); 1247 int truncate_hole(struct inode *, pgoff_t, pgoff_t); 1248 int truncate_data_blocks_range(struct dnode_of_data *, int); 1249 long f2fs_ioctl(struct file *, unsigned int, unsigned long); 1250 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long); 1251 1252 /* 1253 * inode.c 1254 */ 1255 void f2fs_set_inode_flags(struct inode *); 1256 struct inode *f2fs_iget(struct super_block *, unsigned long); 1257 int try_to_free_nats(struct f2fs_sb_info *, int); 1258 void update_inode(struct inode *, struct page *); 1259 void update_inode_page(struct inode *); 1260 int f2fs_write_inode(struct inode *, struct writeback_control *); 1261 void f2fs_evict_inode(struct inode *); 1262 void handle_failed_inode(struct inode *); 1263 1264 /* 1265 * namei.c 1266 */ 1267 struct dentry *f2fs_get_parent(struct dentry *child); 1268 1269 /* 1270 * dir.c 1271 */ 1272 extern unsigned char f2fs_filetype_table[F2FS_FT_MAX]; 1273 void set_de_type(struct f2fs_dir_entry *, struct inode *); 1274 struct f2fs_dir_entry *find_target_dentry(struct qstr *, int *, 1275 struct f2fs_dentry_ptr *); 1276 bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *, 1277 unsigned int); 1278 void do_make_empty_dir(struct inode *, struct inode *, 1279 struct f2fs_dentry_ptr *); 1280 struct page *init_inode_metadata(struct inode *, struct inode *, 1281 const struct qstr *, struct page *); 1282 void update_parent_metadata(struct inode *, struct inode *, unsigned int); 1283 int room_for_filename(const void *, int, int); 1284 void f2fs_drop_nlink(struct inode *, struct inode *, struct page *); 1285 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, 1286 struct page **); 1287 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); 1288 ino_t f2fs_inode_by_name(struct inode *, struct qstr *); 1289 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, 1290 struct page *, struct inode *); 1291 int update_dent_inode(struct inode *, const struct qstr *); 1292 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *); 1293 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *, 1294 struct inode *); 1295 int f2fs_do_tmpfile(struct inode *, struct inode *); 1296 int f2fs_make_empty(struct inode *, struct inode *); 1297 bool f2fs_empty_dir(struct inode *); 1298 1299 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) 1300 { 1301 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name, 1302 inode); 1303 } 1304 1305 /* 1306 * super.c 1307 */ 1308 int f2fs_sync_fs(struct super_block *, int); 1309 extern __printf(3, 4) 1310 void f2fs_msg(struct super_block *, const char *, const char *, ...); 1311 1312 /* 1313 * hash.c 1314 */ 1315 f2fs_hash_t f2fs_dentry_hash(const struct qstr *); 1316 1317 /* 1318 * node.c 1319 */ 1320 struct dnode_of_data; 1321 struct node_info; 1322 1323 bool available_free_memory(struct f2fs_sb_info *, int); 1324 bool is_checkpointed_node(struct f2fs_sb_info *, nid_t); 1325 bool has_fsynced_inode(struct f2fs_sb_info *, nid_t); 1326 bool need_inode_block_update(struct f2fs_sb_info *, nid_t); 1327 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); 1328 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); 1329 int truncate_inode_blocks(struct inode *, pgoff_t); 1330 int truncate_xattr_node(struct inode *, struct page *); 1331 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t); 1332 void remove_inode_page(struct inode *); 1333 struct page *new_inode_page(struct inode *); 1334 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *); 1335 void ra_node_page(struct f2fs_sb_info *, nid_t); 1336 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); 1337 struct page *get_node_page_ra(struct page *, int); 1338 void sync_inode_page(struct dnode_of_data *); 1339 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); 1340 bool alloc_nid(struct f2fs_sb_info *, nid_t *); 1341 void alloc_nid_done(struct f2fs_sb_info *, nid_t); 1342 void alloc_nid_failed(struct f2fs_sb_info *, nid_t); 1343 void recover_inline_xattr(struct inode *, struct page *); 1344 void recover_xattr_data(struct inode *, struct page *, block_t); 1345 int recover_inode_page(struct f2fs_sb_info *, struct page *); 1346 int restore_node_summary(struct f2fs_sb_info *, unsigned int, 1347 struct f2fs_summary_block *); 1348 void flush_nat_entries(struct f2fs_sb_info *); 1349 int build_node_manager(struct f2fs_sb_info *); 1350 void destroy_node_manager(struct f2fs_sb_info *); 1351 int __init create_node_manager_caches(void); 1352 void destroy_node_manager_caches(void); 1353 1354 /* 1355 * segment.c 1356 */ 1357 void register_inmem_page(struct inode *, struct page *); 1358 void invalidate_inmem_page(struct inode *, struct page *); 1359 void commit_inmem_pages(struct inode *, bool); 1360 void f2fs_balance_fs(struct f2fs_sb_info *); 1361 void f2fs_balance_fs_bg(struct f2fs_sb_info *); 1362 int f2fs_issue_flush(struct f2fs_sb_info *); 1363 int create_flush_cmd_control(struct f2fs_sb_info *); 1364 void destroy_flush_cmd_control(struct f2fs_sb_info *); 1365 void invalidate_blocks(struct f2fs_sb_info *, block_t); 1366 void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t); 1367 void clear_prefree_segments(struct f2fs_sb_info *); 1368 void release_discard_addrs(struct f2fs_sb_info *); 1369 void discard_next_dnode(struct f2fs_sb_info *, block_t); 1370 int npages_for_summary_flush(struct f2fs_sb_info *); 1371 void allocate_new_segments(struct f2fs_sb_info *); 1372 int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *); 1373 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); 1374 void write_meta_page(struct f2fs_sb_info *, struct page *); 1375 void write_node_page(struct f2fs_sb_info *, struct page *, 1376 struct f2fs_io_info *, unsigned int, block_t, block_t *); 1377 void write_data_page(struct page *, struct dnode_of_data *, block_t *, 1378 struct f2fs_io_info *); 1379 void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *); 1380 void recover_data_page(struct f2fs_sb_info *, struct page *, 1381 struct f2fs_summary *, block_t, block_t); 1382 void allocate_data_block(struct f2fs_sb_info *, struct page *, 1383 block_t, block_t *, struct f2fs_summary *, int); 1384 void f2fs_wait_on_page_writeback(struct page *, enum page_type); 1385 void write_data_summaries(struct f2fs_sb_info *, block_t); 1386 void write_node_summaries(struct f2fs_sb_info *, block_t); 1387 int lookup_journal_in_cursum(struct f2fs_summary_block *, 1388 int, unsigned int, int); 1389 void flush_sit_entries(struct f2fs_sb_info *, struct cp_control *); 1390 int build_segment_manager(struct f2fs_sb_info *); 1391 void destroy_segment_manager(struct f2fs_sb_info *); 1392 int __init create_segment_manager_caches(void); 1393 void destroy_segment_manager_caches(void); 1394 1395 /* 1396 * checkpoint.c 1397 */ 1398 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); 1399 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); 1400 struct page *get_meta_page_ra(struct f2fs_sb_info *, pgoff_t); 1401 int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int); 1402 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); 1403 void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type); 1404 void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type); 1405 void release_dirty_inode(struct f2fs_sb_info *); 1406 bool exist_written_data(struct f2fs_sb_info *, nid_t, int); 1407 int acquire_orphan_inode(struct f2fs_sb_info *); 1408 void release_orphan_inode(struct f2fs_sb_info *); 1409 void add_orphan_inode(struct f2fs_sb_info *, nid_t); 1410 void remove_orphan_inode(struct f2fs_sb_info *, nid_t); 1411 void recover_orphan_inodes(struct f2fs_sb_info *); 1412 int get_valid_checkpoint(struct f2fs_sb_info *); 1413 void update_dirty_page(struct inode *, struct page *); 1414 void add_dirty_dir_inode(struct inode *); 1415 void remove_dirty_dir_inode(struct inode *); 1416 void sync_dirty_dir_inodes(struct f2fs_sb_info *); 1417 void write_checkpoint(struct f2fs_sb_info *, struct cp_control *); 1418 void init_ino_entry_info(struct f2fs_sb_info *); 1419 int __init create_checkpoint_caches(void); 1420 void destroy_checkpoint_caches(void); 1421 1422 /* 1423 * data.c 1424 */ 1425 void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int); 1426 int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int); 1427 void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t, 1428 struct f2fs_io_info *); 1429 int reserve_new_block(struct dnode_of_data *); 1430 int f2fs_reserve_block(struct dnode_of_data *, pgoff_t); 1431 void update_extent_cache(block_t, struct dnode_of_data *); 1432 struct page *find_data_page(struct inode *, pgoff_t, bool); 1433 struct page *get_lock_data_page(struct inode *, pgoff_t); 1434 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool); 1435 int do_write_data_page(struct page *, struct f2fs_io_info *); 1436 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64); 1437 1438 /* 1439 * gc.c 1440 */ 1441 int start_gc_thread(struct f2fs_sb_info *); 1442 void stop_gc_thread(struct f2fs_sb_info *); 1443 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *); 1444 int f2fs_gc(struct f2fs_sb_info *); 1445 void build_gc_manager(struct f2fs_sb_info *); 1446 int __init create_gc_caches(void); 1447 void destroy_gc_caches(void); 1448 1449 /* 1450 * recovery.c 1451 */ 1452 int recover_fsync_data(struct f2fs_sb_info *); 1453 bool space_for_roll_forward(struct f2fs_sb_info *); 1454 1455 /* 1456 * debug.c 1457 */ 1458 #ifdef CONFIG_F2FS_STAT_FS 1459 struct f2fs_stat_info { 1460 struct list_head stat_list; 1461 struct f2fs_sb_info *sbi; 1462 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; 1463 int main_area_segs, main_area_sections, main_area_zones; 1464 int hit_ext, total_ext; 1465 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; 1466 int nats, sits, fnids; 1467 int total_count, utilization; 1468 int bg_gc, inline_inode, inline_dir; 1469 unsigned int valid_count, valid_node_count, valid_inode_count; 1470 unsigned int bimodal, avg_vblocks; 1471 int util_free, util_valid, util_invalid; 1472 int rsvd_segs, overp_segs; 1473 int dirty_count, node_pages, meta_pages; 1474 int prefree_count, call_count, cp_count; 1475 int tot_segs, node_segs, data_segs, free_segs, free_secs; 1476 int tot_blks, data_blks, node_blks; 1477 int curseg[NR_CURSEG_TYPE]; 1478 int cursec[NR_CURSEG_TYPE]; 1479 int curzone[NR_CURSEG_TYPE]; 1480 1481 unsigned int segment_count[2]; 1482 unsigned int block_count[2]; 1483 unsigned base_mem, cache_mem; 1484 }; 1485 1486 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi) 1487 { 1488 return (struct f2fs_stat_info *)sbi->stat_info; 1489 } 1490 1491 #define stat_inc_cp_count(si) ((si)->cp_count++) 1492 #define stat_inc_call_count(si) ((si)->call_count++) 1493 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++) 1494 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++) 1495 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--) 1496 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++) 1497 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++) 1498 #define stat_inc_inline_inode(inode) \ 1499 do { \ 1500 if (f2fs_has_inline_data(inode)) \ 1501 ((F2FS_I_SB(inode))->inline_inode++); \ 1502 } while (0) 1503 #define stat_dec_inline_inode(inode) \ 1504 do { \ 1505 if (f2fs_has_inline_data(inode)) \ 1506 ((F2FS_I_SB(inode))->inline_inode--); \ 1507 } while (0) 1508 #define stat_inc_inline_dir(inode) \ 1509 do { \ 1510 if (f2fs_has_inline_dentry(inode)) \ 1511 ((F2FS_I_SB(inode))->inline_dir++); \ 1512 } while (0) 1513 #define stat_dec_inline_dir(inode) \ 1514 do { \ 1515 if (f2fs_has_inline_dentry(inode)) \ 1516 ((F2FS_I_SB(inode))->inline_dir--); \ 1517 } while (0) 1518 #define stat_inc_seg_type(sbi, curseg) \ 1519 ((sbi)->segment_count[(curseg)->alloc_type]++) 1520 #define stat_inc_block_count(sbi, curseg) \ 1521 ((sbi)->block_count[(curseg)->alloc_type]++) 1522 1523 #define stat_inc_seg_count(sbi, type) \ 1524 do { \ 1525 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1526 (si)->tot_segs++; \ 1527 if (type == SUM_TYPE_DATA) \ 1528 si->data_segs++; \ 1529 else \ 1530 si->node_segs++; \ 1531 } while (0) 1532 1533 #define stat_inc_tot_blk_count(si, blks) \ 1534 (si->tot_blks += (blks)) 1535 1536 #define stat_inc_data_blk_count(sbi, blks) \ 1537 do { \ 1538 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1539 stat_inc_tot_blk_count(si, blks); \ 1540 si->data_blks += (blks); \ 1541 } while (0) 1542 1543 #define stat_inc_node_blk_count(sbi, blks) \ 1544 do { \ 1545 struct f2fs_stat_info *si = F2FS_STAT(sbi); \ 1546 stat_inc_tot_blk_count(si, blks); \ 1547 si->node_blks += (blks); \ 1548 } while (0) 1549 1550 int f2fs_build_stats(struct f2fs_sb_info *); 1551 void f2fs_destroy_stats(struct f2fs_sb_info *); 1552 void __init f2fs_create_root_stats(void); 1553 void f2fs_destroy_root_stats(void); 1554 #else 1555 #define stat_inc_cp_count(si) 1556 #define stat_inc_call_count(si) 1557 #define stat_inc_bggc_count(si) 1558 #define stat_inc_dirty_dir(sbi) 1559 #define stat_dec_dirty_dir(sbi) 1560 #define stat_inc_total_hit(sb) 1561 #define stat_inc_read_hit(sb) 1562 #define stat_inc_inline_inode(inode) 1563 #define stat_dec_inline_inode(inode) 1564 #define stat_inc_inline_dir(inode) 1565 #define stat_dec_inline_dir(inode) 1566 #define stat_inc_seg_type(sbi, curseg) 1567 #define stat_inc_block_count(sbi, curseg) 1568 #define stat_inc_seg_count(si, type) 1569 #define stat_inc_tot_blk_count(si, blks) 1570 #define stat_inc_data_blk_count(si, blks) 1571 #define stat_inc_node_blk_count(sbi, blks) 1572 1573 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } 1574 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } 1575 static inline void __init f2fs_create_root_stats(void) { } 1576 static inline void f2fs_destroy_root_stats(void) { } 1577 #endif 1578 1579 extern const struct file_operations f2fs_dir_operations; 1580 extern const struct file_operations f2fs_file_operations; 1581 extern const struct inode_operations f2fs_file_inode_operations; 1582 extern const struct address_space_operations f2fs_dblock_aops; 1583 extern const struct address_space_operations f2fs_node_aops; 1584 extern const struct address_space_operations f2fs_meta_aops; 1585 extern const struct inode_operations f2fs_dir_inode_operations; 1586 extern const struct inode_operations f2fs_symlink_inode_operations; 1587 extern const struct inode_operations f2fs_special_inode_operations; 1588 1589 /* 1590 * inline.c 1591 */ 1592 bool f2fs_may_inline(struct inode *); 1593 int f2fs_read_inline_data(struct inode *, struct page *); 1594 int f2fs_convert_inline_data(struct inode *, pgoff_t, struct page *); 1595 int f2fs_write_inline_data(struct inode *, struct page *, unsigned int); 1596 void truncate_inline_data(struct inode *, u64); 1597 bool recover_inline_data(struct inode *, struct page *); 1598 struct f2fs_dir_entry *find_in_inline_dir(struct inode *, struct qstr *, 1599 struct page **); 1600 struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *, struct page **); 1601 int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *); 1602 int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *); 1603 void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *, 1604 struct inode *, struct inode *); 1605 bool f2fs_empty_inline_dir(struct inode *); 1606 int f2fs_read_inline_dir(struct file *, struct dir_context *); 1607 #endif 1608