f2fs_fs.h revision e69e4378500b836863dfb7f6e88e39935f23ae80
1/** 2 * f2fs_fs.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 __F2FS_FS_H__ 12#define __F2FS_FS_H__ 13 14#include <inttypes.h> 15#include <linux/types.h> 16#include <sys/types.h> 17#include <endian.h> 18#include <byteswap.h> 19 20#ifdef HAVE_CONFIG_H 21#include <config.h> 22#endif 23 24#if __BYTE_ORDER == __LITTLE_ENDIAN 25#define le16_to_cpu(x) ((__u16)(x)) 26#define le32_to_cpu(x) ((__u32)(x)) 27#define le64_to_cpu(x) ((__u64)(x)) 28#define cpu_to_le16(x) ((__u16)(x)) 29#define cpu_to_le32(x) ((__u32)(x)) 30#define cpu_to_le64(x) ((__u64)(x)) 31#elif __BYTE_ORDER == __BIG_ENDIAN 32#define le16_to_cpu(x) bswap_16(x) 33#define le32_to_cpu(x) bswap_32(x) 34#define le64_to_cpu(x) bswap_64(x) 35#define cpu_to_le16(x) bswap_16(x) 36#define cpu_to_le32(x) bswap_32(x) 37#define cpu_to_le64(x) bswap_64(x) 38#endif 39 40/* 41 * Debugging interfaces 42 */ 43#define ASSERT_MSG(exp, fmt, ...) \ 44 do { \ 45 if (!(exp)) { \ 46 printf("\nAssertion failed!\n"); \ 47 printf("[%s:%4d] " #exp, __func__, __LINE__); \ 48 printf("\n --> "fmt, ##__VA_ARGS__); \ 49 exit(-1); \ 50 } \ 51 } while (0); 52 53#define ASSERT(exp) \ 54 do { \ 55 if (!(exp)) { \ 56 printf("\nAssertion failed!\n"); \ 57 printf("[%s:%4d] " #exp"\n", __func__, __LINE__);\ 58 exit(-1); \ 59 } \ 60 } while (0); 61 62#define MSG(n, fmt, ...) \ 63 do { \ 64 if (config.dbg_lv >= n) { \ 65 printf(fmt, ##__VA_ARGS__); \ 66 } \ 67 } while (0); 68 69#define DBG(n, fmt, ...) \ 70 do { \ 71 if (config.dbg_lv >= n) { \ 72 printf("[%s:%4d] " fmt, \ 73 __func__, __LINE__, ##__VA_ARGS__); \ 74 } \ 75 } while (0); 76 77/* Display on console */ 78#define DISP(fmt, ptr, member) \ 79 do { \ 80 printf("%-30s" fmt, #member, ((ptr)->member)); \ 81 } while (0); 82 83#define DISP_u32(ptr, member) \ 84 do { \ 85 assert(sizeof((ptr)->member) <= 4); \ 86 printf("%-30s" "\t\t[0x%8x : %u]\n", \ 87 #member, ((ptr)->member), ((ptr)->member) ); \ 88 } while (0); 89 90#define DISP_u64(ptr, member) \ 91 do { \ 92 assert(sizeof((ptr)->member) == 8); \ 93 printf("%-30s" "\t\t[0x%8llx : %llu]\n", \ 94 #member, ((ptr)->member), ((ptr)->member) ); \ 95 } while (0); 96 97#define DISP_utf(ptr, member) \ 98 do { \ 99 printf(#member "\t\t\t\t[%s]\n", ((ptr)->member) ); \ 100 } while (0); 101 102/* Display to buffer */ 103#define BUF_DISP_u32(buf, data, len, ptr, member) \ 104 do { \ 105 assert(sizeof((ptr)->member) <= 4); \ 106 snprintf(buf, len, #member); \ 107 snprintf(data, len, "0x%x : %u", ((ptr)->member), ((ptr)->member)); \ 108 } while (0); 109 110#define BUF_DISP_u64(buf, data, len, ptr, member) \ 111 do { \ 112 assert(sizeof((ptr)->member) == 8); \ 113 snprintf(buf, len, #member); \ 114 snprintf(data, len, "0x%llx : %llu", ((ptr)->member), ((ptr)->member)); \ 115 } while (0); 116 117#define BUF_DISP_utf(buf, data, len, ptr, member) \ 118 do { \ 119 snprintf(buf, len, #member); \ 120 } while (0); 121 122/* these are defined in kernel */ 123#define PAGE_SIZE 4096 124#define PAGE_CACHE_SIZE 4096 125#define BITS_PER_BYTE 8 126#define F2FS_SUPER_MAGIC 0xF2F52010 /* F2FS Magic Number */ 127 128/* for mkfs */ 129#define F2FS_MIN_VOLUME_SIZE 104857600 130#define F2FS_NUMBER_OF_CHECKPOINT_PACK 2 131#define DEFAULT_SECTOR_SIZE 512 132#define DEFAULT_SECTORS_PER_BLOCK 8 133#define DEFAULT_BLOCKS_PER_SEGMENT 512 134#define DEFAULT_SEGMENTS_PER_SECTION 1 135 136struct f2fs_configuration { 137 u_int32_t sector_size; 138 u_int32_t reserved_segments; 139 u_int32_t overprovision; 140 u_int32_t cur_seg[6]; 141 u_int32_t segs_per_sec; 142 u_int32_t secs_per_zone; 143 u_int32_t start_sector; 144 u_int64_t total_sectors; 145 u_int32_t sectors_per_blk; 146 u_int32_t blks_per_seg; 147 u_int8_t vol_label[16]; 148 int heap; 149 int32_t fd; 150 char *device_name; 151 char *extension_list; 152 int dbg_lv; 153} __attribute__((packed)); 154 155#ifdef CONFIG_64BIT 156#define BITS_PER_LONG 64 157#else 158#define BITS_PER_LONG 32 159#endif 160 161#define BIT_MASK(nr) (1 << (nr % BITS_PER_LONG)) 162#define BIT_WORD(nr) (nr / BITS_PER_LONG) 163 164/* 165 * Copied from fs/f2fs/f2fs.h 166 */ 167#define NR_CURSEG_DATA_TYPE (3) 168#define NR_CURSEG_NODE_TYPE (3) 169#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 170 171enum { 172 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 173 CURSEG_WARM_DATA, /* data blocks */ 174 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 175 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 176 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 177 CURSEG_COLD_NODE, /* indirect node blocks */ 178 NO_CHECK_TYPE 179}; 180 181/* 182 * Copied from fs/f2fs/segment.h 183 */ 184#define GET_SUM_TYPE(footer) ((footer)->entry_type) 185#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type) 186 187/* 188 * Copied from include/linux/f2fs_sb.h 189 */ 190#define F2FS_SUPER_OFFSET 1024 /* byte-size offset */ 191#define F2FS_LOG_SECTOR_SIZE 9 /* 9 bits for 512 byte */ 192#define F2FS_LOG_SECTORS_PER_BLOCK 3 /* 4KB: F2FS_BLKSIZE */ 193#define F2FS_BLKSIZE 4096 /* support only 4KB block */ 194#define F2FS_MAX_EXTENSION 64 /* # of extension entries */ 195 196#define NULL_ADDR 0x0U 197#define NEW_ADDR -1U 198 199#define F2FS_ROOT_INO(sbi) (sbi->root_ino_num) 200#define F2FS_NODE_INO(sbi) (sbi->node_ino_num) 201#define F2FS_META_INO(sbi) (sbi->meta_ino_num) 202 203/* This flag is used by node and meta inodes, and by recovery */ 204#define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO) 205 206/* 207 * For further optimization on multi-head logs, on-disk layout supports maximum 208 * 16 logs by default. The number, 16, is expected to cover all the cases 209 * enoughly. The implementaion currently uses no more than 6 logs. 210 * Half the logs are used for nodes, and the other half are used for data. 211 */ 212#define MAX_ACTIVE_LOGS 16 213#define MAX_ACTIVE_NODE_LOGS 8 214#define MAX_ACTIVE_DATA_LOGS 8 215 216/* 217 * For superblock 218 */ 219struct f2fs_super_block { 220 __le32 magic; /* Magic Number */ 221 __le16 major_ver; /* Major Version */ 222 __le16 minor_ver; /* Minor Version */ 223 __le32 log_sectorsize; /* log2 sector size in bytes */ 224 __le32 log_sectors_per_block; /* log2 # of sectors per block */ 225 __le32 log_blocksize; /* log2 block size in bytes */ 226 __le32 log_blocks_per_seg; /* log2 # of blocks per segment */ 227 __le32 segs_per_sec; /* # of segments per section */ 228 __le32 secs_per_zone; /* # of sections per zone */ 229 __le32 checksum_offset; /* checksum offset inside super block */ 230 __le64 block_count; /* total # of user blocks */ 231 __le32 section_count; /* total # of sections */ 232 __le32 segment_count; /* total # of segments */ 233 __le32 segment_count_ckpt; /* # of segments for checkpoint */ 234 __le32 segment_count_sit; /* # of segments for SIT */ 235 __le32 segment_count_nat; /* # of segments for NAT */ 236 __le32 segment_count_ssa; /* # of segments for SSA */ 237 __le32 segment_count_main; /* # of segments for main area */ 238 __le32 segment0_blkaddr; /* start block address of segment 0 */ 239 __le32 cp_blkaddr; /* start block address of checkpoint */ 240 __le32 sit_blkaddr; /* start block address of SIT */ 241 __le32 nat_blkaddr; /* start block address of NAT */ 242 __le32 ssa_blkaddr; /* start block address of SSA */ 243 __le32 main_blkaddr; /* start block address of main area */ 244 __le32 root_ino; /* root inode number */ 245 __le32 node_ino; /* node inode number */ 246 __le32 meta_ino; /* meta inode number */ 247 __u8 uuid[16]; /* 128-bit uuid for volume */ 248 __le16 volume_name[512]; /* volume name */ 249 __le32 extension_count; /* # of extensions below */ 250 __u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */ 251} __attribute__((packed)); 252 253/* 254 * For checkpoint 255 */ 256#define CP_ERROR_FLAG 0x00000008 257#define CP_COMPACT_SUM_FLAG 0x00000004 258#define CP_ORPHAN_PRESENT_FLAG 0x00000002 259#define CP_UMOUNT_FLAG 0x00000001 260 261struct f2fs_checkpoint { 262 __le64 checkpoint_ver; /* checkpoint block version number */ 263 __le64 user_block_count; /* # of user blocks */ 264 __le64 valid_block_count; /* # of valid blocks in main area */ 265 __le32 rsvd_segment_count; /* # of reserved segments for gc */ 266 __le32 overprov_segment_count; /* # of overprovision segments */ 267 __le32 free_segment_count; /* # of free segments in main area */ 268 269 /* information of current node segments */ 270 __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS]; 271 __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS]; 272 /* information of current data segments */ 273 __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS]; 274 __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS]; 275 __le32 ckpt_flags; /* Flags : umount and journal_present */ 276 __le32 cp_pack_total_block_count; /* total # of one cp pack */ 277 __le32 cp_pack_start_sum; /* start block number of data summary */ 278 __le32 valid_node_count; /* Total number of valid nodes */ 279 __le32 valid_inode_count; /* Total number of valid inodes */ 280 __le32 next_free_nid; /* Next free node number */ 281 __le32 sit_ver_bitmap_bytesize; /* Default value 64 */ 282 __le32 nat_ver_bitmap_bytesize; /* Default value 256 */ 283 __le32 checksum_offset; /* checksum offset inside cp block */ 284 __le64 elapsed_time; /* mounted time */ 285 /* allocation type of current segment */ 286 unsigned char alloc_type[MAX_ACTIVE_LOGS]; 287 288 /* SIT and NAT version bitmap */ 289 unsigned char sit_nat_version_bitmap[1]; 290} __attribute__((packed)); 291 292/* 293 * For orphan inode management 294 */ 295#define F2FS_ORPHANS_PER_BLOCK 1020 296 297struct f2fs_orphan_block { 298 __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */ 299 __le32 reserved; /* reserved */ 300 __le16 blk_addr; /* block index in current CP */ 301 __le16 blk_count; /* Number of orphan inode blocks in CP */ 302 __le32 entry_count; /* Total number of orphan nodes in current CP */ 303 __le32 check_sum; /* CRC32 for orphan inode block */ 304} __attribute__((packed)); 305 306/* 307 * For NODE structure 308 */ 309struct f2fs_extent { 310 __le32 fofs; /* start file offset of the extent */ 311 __le32 blk_addr; /* start block address of the extent */ 312 __le32 len; /* lengh of the extent */ 313} __attribute__((packed)); 314 315#define F2FS_MAX_NAME_LEN 256 316#define ADDRS_PER_INODE 923 /* Address Pointers in an Inode */ 317#define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */ 318#define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */ 319 320struct f2fs_inode { 321 __le16 i_mode; /* file mode */ 322 __u8 i_advise; /* file hints */ 323 __u8 i_reserved; /* reserved */ 324 __le32 i_uid; /* user ID */ 325 __le32 i_gid; /* group ID */ 326 __le32 i_links; /* links count */ 327 __le64 i_size; /* file size in bytes */ 328 __le64 i_blocks; /* file size in blocks */ 329 __le64 i_atime; /* access time */ 330 __le64 i_ctime; /* change time */ 331 __le64 i_mtime; /* modification time */ 332 __le32 i_atime_nsec; /* access time in nano scale */ 333 __le32 i_ctime_nsec; /* change time in nano scale */ 334 __le32 i_mtime_nsec; /* modification time in nano scale */ 335 __le32 i_generation; /* file version (for NFS) */ 336 __le32 i_current_depth; /* only for directory depth */ 337 __le32 i_xattr_nid; /* nid to save xattr */ 338 __le32 i_flags; /* file attributes */ 339 __le32 i_pino; /* parent inode number */ 340 __le32 i_namelen; /* file name length */ 341 __u8 i_name[F2FS_MAX_NAME_LEN]; /* file name for SPOR */ 342 343 struct f2fs_extent i_ext; /* caching a largest extent */ 344 345 __le32 i_addr[ADDRS_PER_INODE]; /* Pointers to data blocks */ 346 347 __le32 i_nid[5]; /* direct(2), indirect(2), 348 double_indirect(1) node id */ 349} __attribute__((packed)); 350 351struct direct_node { 352 __le32 addr[ADDRS_PER_BLOCK]; /* array of data block address */ 353} __attribute__((packed)); 354 355struct indirect_node { 356 __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */ 357} __attribute__((packed)); 358 359enum { 360 COLD_BIT_SHIFT = 0, 361 FSYNC_BIT_SHIFT, 362 DENT_BIT_SHIFT, 363 OFFSET_BIT_SHIFT 364}; 365 366struct node_footer { 367 __le32 nid; /* node id */ 368 __le32 ino; /* inode nunmber */ 369 __le32 flag; /* include cold/fsync/dentry marks and offset */ 370 __le64 cp_ver; /* checkpoint version */ 371 __le32 next_blkaddr; /* next node page block address */ 372} __attribute__((packed)); 373 374struct f2fs_node { 375 /* can be one of three types: inode, direct, and indirect types */ 376 union { 377 struct f2fs_inode i; 378 struct direct_node dn; 379 struct indirect_node in; 380 }; 381 struct node_footer footer; 382} __attribute__((packed)); 383 384/* 385 * For NAT entries 386 */ 387#define NAT_ENTRY_PER_BLOCK (PAGE_CACHE_SIZE / sizeof(struct f2fs_nat_entry)) 388 389struct f2fs_nat_entry { 390 __u8 version; /* latest version of cached nat entry */ 391 __le32 ino; /* inode number */ 392 __le32 block_addr; /* block address */ 393} __attribute__((packed)); 394 395struct f2fs_nat_block { 396 struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK]; 397} __attribute__((packed)); 398 399/* 400 * For SIT entries 401 * 402 * Each segment is 2MB in size by default so that a bitmap for validity of 403 * there-in blocks should occupy 64 bytes, 512 bits. 404 * Not allow to change this. 405 */ 406#define SIT_VBLOCK_MAP_SIZE 64 407#define SIT_ENTRY_PER_BLOCK (PAGE_CACHE_SIZE / sizeof(struct f2fs_sit_entry)) 408 409/* 410 * Note that f2fs_sit_entry->vblocks has the following bit-field information. 411 * [15:10] : allocation type such as CURSEG_XXXX_TYPE 412 * [9:0] : valid block count 413 */ 414#define SIT_VBLOCKS_SHIFT 10 415#define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1) 416#define GET_SIT_VBLOCKS(raw_sit) \ 417 (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK) 418#define GET_SIT_TYPE(raw_sit) \ 419 ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \ 420 >> SIT_VBLOCKS_SHIFT) 421 422struct f2fs_sit_entry { 423 __le16 vblocks; /* reference above */ 424 __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */ 425 __le64 mtime; /* segment age for cleaning */ 426} __attribute__((packed)); 427 428struct f2fs_sit_block { 429 struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK]; 430} __attribute__((packed)); 431 432/* 433 * For segment summary 434 * 435 * One summary block contains exactly 512 summary entries, which represents 436 * exactly 2MB segment by default. Not allow to change the basic units. 437 * 438 * NOTE: For initializing fields, you must use set_summary 439 * 440 * - If data page, nid represents dnode's nid 441 * - If node page, nid represents the node page's nid. 442 * 443 * The ofs_in_node is used by only data page. It represents offset 444 * from node's page's beginning to get a data block address. 445 * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node) 446 */ 447#define ENTRIES_IN_SUM 512 448#define SUMMARY_SIZE (7) /* sizeof(struct summary) */ 449#define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */ 450#define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM) 451 452/* a summary entry for a 4KB-sized block in a segment */ 453struct f2fs_summary { 454 __le32 nid; /* parent node id */ 455 union { 456 __u8 reserved[3]; 457 struct { 458 __u8 version; /* node version number */ 459 __le16 ofs_in_node; /* block index in parent node */ 460 } __attribute__((packed)); 461 }; 462} __attribute__((packed)); 463 464/* summary block type, node or data, is stored to the summary_footer */ 465#define SUM_TYPE_NODE (1) 466#define SUM_TYPE_DATA (0) 467 468struct summary_footer { 469 unsigned char entry_type; /* SUM_TYPE_XXX */ 470 __u32 check_sum; /* summary checksum */ 471} __attribute__((packed)); 472 473#define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\ 474 SUM_ENTRY_SIZE) 475#define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 476 sizeof(struct nat_journal_entry)) 477#define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 478 sizeof(struct nat_journal_entry)) 479#define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 480 sizeof(struct sit_journal_entry)) 481#define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 482 sizeof(struct sit_journal_entry)) 483/* 484 * frequently updated NAT/SIT entries can be stored in the spare area in 485 * summary blocks 486 */ 487enum { 488 NAT_JOURNAL = 0, 489 SIT_JOURNAL 490}; 491 492struct nat_journal_entry { 493 __le32 nid; 494 struct f2fs_nat_entry ne; 495} __attribute__((packed)); 496 497struct nat_journal { 498 struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES]; 499 __u8 reserved[NAT_JOURNAL_RESERVED]; 500} __attribute__((packed)); 501 502struct sit_journal_entry { 503 __le32 segno; 504 struct f2fs_sit_entry se; 505} __attribute__((packed)); 506 507struct sit_journal { 508 struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES]; 509 __u8 reserved[SIT_JOURNAL_RESERVED]; 510} __attribute__((packed)); 511 512/* 4KB-sized summary block structure */ 513struct f2fs_summary_block { 514 struct f2fs_summary entries[ENTRIES_IN_SUM]; 515 union { 516 __le16 n_nats; 517 __le16 n_sits; 518 }; 519 /* spare area is used by NAT or SIT journals */ 520 union { 521 struct nat_journal nat_j; 522 struct sit_journal sit_j; 523 }; 524 struct summary_footer footer; 525} __attribute__((packed)); 526 527/* 528 * For directory operations 529 */ 530#define F2FS_DOT_HASH 0 531#define F2FS_DDOT_HASH F2FS_DOT_HASH 532#define F2FS_MAX_HASH (~((0x3ULL) << 62)) 533#define F2FS_HASH_COL_BIT ((0x1ULL) << 63) 534 535typedef __le32 f2fs_hash_t; 536 537/* One directory entry slot covers 8bytes-long file name */ 538#define F2FS_NAME_LEN 8 539#define F2FS_NAME_LEN_BITS 3 540 541#define GET_DENTRY_SLOTS(x) ((x + F2FS_NAME_LEN - 1) >> F2FS_NAME_LEN_BITS) 542 543/* the number of dentry in a block */ 544#define NR_DENTRY_IN_BLOCK 214 545 546/* MAX level for dir lookup */ 547#define MAX_DIR_HASH_DEPTH 63 548 549#define SIZE_OF_DIR_ENTRY 11 /* by byte */ 550#define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ 551 BITS_PER_BYTE) 552#define SIZE_OF_RESERVED (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \ 553 F2FS_NAME_LEN) * \ 554 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP)) 555 556/* One directory entry slot representing F2FS_NAME_LEN-sized file name */ 557struct f2fs_dir_entry { 558 __le32 hash_code; /* hash code of file name */ 559 __le32 ino; /* inode number */ 560 __le16 name_len; /* lengh of file name */ 561 __u8 file_type; /* file type */ 562} __attribute__((packed)); 563 564/* 4KB-sized directory entry block */ 565struct f2fs_dentry_block { 566 /* validity bitmap for directory entries in each block */ 567 __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP]; 568 __u8 reserved[SIZE_OF_RESERVED]; 569 struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK]; 570 __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_NAME_LEN]; 571} __attribute__((packed)); 572 573/* file types used in inode_info->flags */ 574enum { 575 F2FS_FT_UNKNOWN, 576 F2FS_FT_REG_FILE, 577 F2FS_FT_DIR, 578 F2FS_FT_CHRDEV, 579 F2FS_FT_BLKDEV, 580 F2FS_FT_FIFO, 581 F2FS_FT_SOCK, 582 F2FS_FT_SYMLINK, 583 F2FS_FT_MAX 584}; 585 586void ASCIIToUNICODE(u_int16_t *, u_int8_t *); 587int log_base_2(u_int32_t); 588 589int f2fs_test_bit(unsigned int, const char *); 590int f2fs_set_bit(unsigned int, unsigned char *); 591int f2fs_clear_bit(unsigned int, char *); 592 593u_int32_t f2fs_cal_crc32(u_int32_t, void *, int); 594 595void f2fs_init_configuration(struct f2fs_configuration *); 596int f2fs_dev_is_mounted(struct f2fs_configuration *); 597int f2fs_get_device_info(struct f2fs_configuration *); 598 599int dev_read(int, void *, __u64, size_t); 600int dev_write(int, void *, __u64, size_t); 601 602int dev_read_block(int, void *, __u64); 603int dev_read_blocks(int, void *, __u64, __u32 ); 604 605#endif //__F2FS_FS_H__ 606