f2fs_fs.h revision fef98ebdf3a7728017cb3d0ae4ffedc5405e531d
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 char *vol_label; 148 int heap; 149 int32_t fd; 150 char *device_name; 151 char *extension_list; 152 int dbg_lv; 153 int trim; 154} __attribute__((packed)); 155 156#ifdef CONFIG_64BIT 157#define BITS_PER_LONG 64 158#else 159#define BITS_PER_LONG 32 160#endif 161 162#define BIT_MASK(nr) (1 << (nr % BITS_PER_LONG)) 163#define BIT_WORD(nr) (nr / BITS_PER_LONG) 164 165/* 166 * Copied from fs/f2fs/f2fs.h 167 */ 168#define NR_CURSEG_DATA_TYPE (3) 169#define NR_CURSEG_NODE_TYPE (3) 170#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) 171 172enum { 173 CURSEG_HOT_DATA = 0, /* directory entry blocks */ 174 CURSEG_WARM_DATA, /* data blocks */ 175 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ 176 CURSEG_HOT_NODE, /* direct node blocks of directory files */ 177 CURSEG_WARM_NODE, /* direct node blocks of normal files */ 178 CURSEG_COLD_NODE, /* indirect node blocks */ 179 NO_CHECK_TYPE 180}; 181 182/* 183 * Copied from fs/f2fs/segment.h 184 */ 185#define GET_SUM_TYPE(footer) ((footer)->entry_type) 186#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type) 187 188/* 189 * Copied from include/linux/f2fs_sb.h 190 */ 191#define F2FS_SUPER_OFFSET 1024 /* byte-size offset */ 192#define F2FS_LOG_SECTOR_SIZE 9 /* 9 bits for 512 byte */ 193#define F2FS_LOG_SECTORS_PER_BLOCK 3 /* 4KB: F2FS_BLKSIZE */ 194#define F2FS_BLKSIZE 4096 /* support only 4KB block */ 195#define F2FS_MAX_EXTENSION 64 /* # of extension entries */ 196 197#define NULL_ADDR 0x0U 198#define NEW_ADDR -1U 199 200#define F2FS_ROOT_INO(sbi) (sbi->root_ino_num) 201#define F2FS_NODE_INO(sbi) (sbi->node_ino_num) 202#define F2FS_META_INO(sbi) (sbi->meta_ino_num) 203 204/* This flag is used by node and meta inodes, and by recovery */ 205#define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO) 206 207/* 208 * For further optimization on multi-head logs, on-disk layout supports maximum 209 * 16 logs by default. The number, 16, is expected to cover all the cases 210 * enoughly. The implementaion currently uses no more than 6 logs. 211 * Half the logs are used for nodes, and the other half are used for data. 212 */ 213#define MAX_ACTIVE_LOGS 16 214#define MAX_ACTIVE_NODE_LOGS 8 215#define MAX_ACTIVE_DATA_LOGS 8 216 217/* 218 * For superblock 219 */ 220struct f2fs_super_block { 221 __le32 magic; /* Magic Number */ 222 __le16 major_ver; /* Major Version */ 223 __le16 minor_ver; /* Minor Version */ 224 __le32 log_sectorsize; /* log2 sector size in bytes */ 225 __le32 log_sectors_per_block; /* log2 # of sectors per block */ 226 __le32 log_blocksize; /* log2 block size in bytes */ 227 __le32 log_blocks_per_seg; /* log2 # of blocks per segment */ 228 __le32 segs_per_sec; /* # of segments per section */ 229 __le32 secs_per_zone; /* # of sections per zone */ 230 __le32 checksum_offset; /* checksum offset inside super block */ 231 __le64 block_count; /* total # of user blocks */ 232 __le32 section_count; /* total # of sections */ 233 __le32 segment_count; /* total # of segments */ 234 __le32 segment_count_ckpt; /* # of segments for checkpoint */ 235 __le32 segment_count_sit; /* # of segments for SIT */ 236 __le32 segment_count_nat; /* # of segments for NAT */ 237 __le32 segment_count_ssa; /* # of segments for SSA */ 238 __le32 segment_count_main; /* # of segments for main area */ 239 __le32 segment0_blkaddr; /* start block address of segment 0 */ 240 __le32 cp_blkaddr; /* start block address of checkpoint */ 241 __le32 sit_blkaddr; /* start block address of SIT */ 242 __le32 nat_blkaddr; /* start block address of NAT */ 243 __le32 ssa_blkaddr; /* start block address of SSA */ 244 __le32 main_blkaddr; /* start block address of main area */ 245 __le32 root_ino; /* root inode number */ 246 __le32 node_ino; /* node inode number */ 247 __le32 meta_ino; /* meta inode number */ 248 __u8 uuid[16]; /* 128-bit uuid for volume */ 249 __le16 volume_name[512]; /* volume name */ 250 __le32 extension_count; /* # of extensions below */ 251 __u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */ 252} __attribute__((packed)); 253 254/* 255 * For checkpoint 256 */ 257#define CP_ERROR_FLAG 0x00000008 258#define CP_COMPACT_SUM_FLAG 0x00000004 259#define CP_ORPHAN_PRESENT_FLAG 0x00000002 260#define CP_UMOUNT_FLAG 0x00000001 261 262struct f2fs_checkpoint { 263 __le64 checkpoint_ver; /* checkpoint block version number */ 264 __le64 user_block_count; /* # of user blocks */ 265 __le64 valid_block_count; /* # of valid blocks in main area */ 266 __le32 rsvd_segment_count; /* # of reserved segments for gc */ 267 __le32 overprov_segment_count; /* # of overprovision segments */ 268 __le32 free_segment_count; /* # of free segments in main area */ 269 270 /* information of current node segments */ 271 __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS]; 272 __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS]; 273 /* information of current data segments */ 274 __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS]; 275 __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS]; 276 __le32 ckpt_flags; /* Flags : umount and journal_present */ 277 __le32 cp_pack_total_block_count; /* total # of one cp pack */ 278 __le32 cp_pack_start_sum; /* start block number of data summary */ 279 __le32 valid_node_count; /* Total number of valid nodes */ 280 __le32 valid_inode_count; /* Total number of valid inodes */ 281 __le32 next_free_nid; /* Next free node number */ 282 __le32 sit_ver_bitmap_bytesize; /* Default value 64 */ 283 __le32 nat_ver_bitmap_bytesize; /* Default value 256 */ 284 __le32 checksum_offset; /* checksum offset inside cp block */ 285 __le64 elapsed_time; /* mounted time */ 286 /* allocation type of current segment */ 287 unsigned char alloc_type[MAX_ACTIVE_LOGS]; 288 289 /* SIT and NAT version bitmap */ 290 unsigned char sit_nat_version_bitmap[1]; 291} __attribute__((packed)); 292 293/* 294 * For orphan inode management 295 */ 296#define F2FS_ORPHANS_PER_BLOCK 1020 297 298struct f2fs_orphan_block { 299 __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */ 300 __le32 reserved; /* reserved */ 301 __le16 blk_addr; /* block index in current CP */ 302 __le16 blk_count; /* Number of orphan inode blocks in CP */ 303 __le32 entry_count; /* Total number of orphan nodes in current CP */ 304 __le32 check_sum; /* CRC32 for orphan inode block */ 305} __attribute__((packed)); 306 307/* 308 * For NODE structure 309 */ 310struct f2fs_extent { 311 __le32 fofs; /* start file offset of the extent */ 312 __le32 blk_addr; /* start block address of the extent */ 313 __le32 len; /* lengh of the extent */ 314} __attribute__((packed)); 315 316#define F2FS_NAME_LEN 255 317#define ADDRS_PER_INODE 923 /* Address Pointers in an Inode */ 318#define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */ 319#define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */ 320 321struct f2fs_inode { 322 __le16 i_mode; /* file mode */ 323 __u8 i_advise; /* file hints */ 324 __u8 i_reserved; /* reserved */ 325 __le32 i_uid; /* user ID */ 326 __le32 i_gid; /* group ID */ 327 __le32 i_links; /* links count */ 328 __le64 i_size; /* file size in bytes */ 329 __le64 i_blocks; /* file size in blocks */ 330 __le64 i_atime; /* access time */ 331 __le64 i_ctime; /* change time */ 332 __le64 i_mtime; /* modification time */ 333 __le32 i_atime_nsec; /* access time in nano scale */ 334 __le32 i_ctime_nsec; /* change time in nano scale */ 335 __le32 i_mtime_nsec; /* modification time in nano scale */ 336 __le32 i_generation; /* file version (for NFS) */ 337 __le32 i_current_depth; /* only for directory depth */ 338 __le32 i_xattr_nid; /* nid to save xattr */ 339 __le32 i_flags; /* file attributes */ 340 __le32 i_pino; /* parent inode number */ 341 __le32 i_namelen; /* file name length */ 342 __u8 i_name[F2FS_NAME_LEN]; /* file name for SPOR */ 343 __u8 i_reserved2; /* for backward compatibility */ 344 345 struct f2fs_extent i_ext; /* caching a largest extent */ 346 347 __le32 i_addr[ADDRS_PER_INODE]; /* Pointers to data blocks */ 348 349 __le32 i_nid[5]; /* direct(2), indirect(2), 350 double_indirect(1) node id */ 351} __attribute__((packed)); 352 353struct direct_node { 354 __le32 addr[ADDRS_PER_BLOCK]; /* array of data block address */ 355} __attribute__((packed)); 356 357struct indirect_node { 358 __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */ 359} __attribute__((packed)); 360 361enum { 362 COLD_BIT_SHIFT = 0, 363 FSYNC_BIT_SHIFT, 364 DENT_BIT_SHIFT, 365 OFFSET_BIT_SHIFT 366}; 367 368struct node_footer { 369 __le32 nid; /* node id */ 370 __le32 ino; /* inode nunmber */ 371 __le32 flag; /* include cold/fsync/dentry marks and offset */ 372 __le64 cp_ver; /* checkpoint version */ 373 __le32 next_blkaddr; /* next node page block address */ 374} __attribute__((packed)); 375 376struct f2fs_node { 377 /* can be one of three types: inode, direct, and indirect types */ 378 union { 379 struct f2fs_inode i; 380 struct direct_node dn; 381 struct indirect_node in; 382 }; 383 struct node_footer footer; 384} __attribute__((packed)); 385 386/* 387 * For NAT entries 388 */ 389#define NAT_ENTRY_PER_BLOCK (PAGE_CACHE_SIZE / sizeof(struct f2fs_nat_entry)) 390 391struct f2fs_nat_entry { 392 __u8 version; /* latest version of cached nat entry */ 393 __le32 ino; /* inode number */ 394 __le32 block_addr; /* block address */ 395} __attribute__((packed)); 396 397struct f2fs_nat_block { 398 struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK]; 399} __attribute__((packed)); 400 401/* 402 * For SIT entries 403 * 404 * Each segment is 2MB in size by default so that a bitmap for validity of 405 * there-in blocks should occupy 64 bytes, 512 bits. 406 * Not allow to change this. 407 */ 408#define SIT_VBLOCK_MAP_SIZE 64 409#define SIT_ENTRY_PER_BLOCK (PAGE_CACHE_SIZE / sizeof(struct f2fs_sit_entry)) 410 411/* 412 * Note that f2fs_sit_entry->vblocks has the following bit-field information. 413 * [15:10] : allocation type such as CURSEG_XXXX_TYPE 414 * [9:0] : valid block count 415 */ 416#define SIT_VBLOCKS_SHIFT 10 417#define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1) 418#define GET_SIT_VBLOCKS(raw_sit) \ 419 (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK) 420#define GET_SIT_TYPE(raw_sit) \ 421 ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \ 422 >> SIT_VBLOCKS_SHIFT) 423 424struct f2fs_sit_entry { 425 __le16 vblocks; /* reference above */ 426 __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */ 427 __le64 mtime; /* segment age for cleaning */ 428} __attribute__((packed)); 429 430struct f2fs_sit_block { 431 struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK]; 432} __attribute__((packed)); 433 434/* 435 * For segment summary 436 * 437 * One summary block contains exactly 512 summary entries, which represents 438 * exactly 2MB segment by default. Not allow to change the basic units. 439 * 440 * NOTE: For initializing fields, you must use set_summary 441 * 442 * - If data page, nid represents dnode's nid 443 * - If node page, nid represents the node page's nid. 444 * 445 * The ofs_in_node is used by only data page. It represents offset 446 * from node's page's beginning to get a data block address. 447 * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node) 448 */ 449#define ENTRIES_IN_SUM 512 450#define SUMMARY_SIZE (7) /* sizeof(struct summary) */ 451#define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */ 452#define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM) 453 454/* a summary entry for a 4KB-sized block in a segment */ 455struct f2fs_summary { 456 __le32 nid; /* parent node id */ 457 union { 458 __u8 reserved[3]; 459 struct { 460 __u8 version; /* node version number */ 461 __le16 ofs_in_node; /* block index in parent node */ 462 } __attribute__((packed)); 463 }; 464} __attribute__((packed)); 465 466/* summary block type, node or data, is stored to the summary_footer */ 467#define SUM_TYPE_NODE (1) 468#define SUM_TYPE_DATA (0) 469 470struct summary_footer { 471 unsigned char entry_type; /* SUM_TYPE_XXX */ 472 __u32 check_sum; /* summary checksum */ 473} __attribute__((packed)); 474 475#define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\ 476 SUM_ENTRY_SIZE) 477#define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 478 sizeof(struct nat_journal_entry)) 479#define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 480 sizeof(struct nat_journal_entry)) 481#define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 482 sizeof(struct sit_journal_entry)) 483#define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 484 sizeof(struct sit_journal_entry)) 485/* 486 * frequently updated NAT/SIT entries can be stored in the spare area in 487 * summary blocks 488 */ 489enum { 490 NAT_JOURNAL = 0, 491 SIT_JOURNAL 492}; 493 494struct nat_journal_entry { 495 __le32 nid; 496 struct f2fs_nat_entry ne; 497} __attribute__((packed)); 498 499struct nat_journal { 500 struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES]; 501 __u8 reserved[NAT_JOURNAL_RESERVED]; 502} __attribute__((packed)); 503 504struct sit_journal_entry { 505 __le32 segno; 506 struct f2fs_sit_entry se; 507} __attribute__((packed)); 508 509struct sit_journal { 510 struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES]; 511 __u8 reserved[SIT_JOURNAL_RESERVED]; 512} __attribute__((packed)); 513 514/* 4KB-sized summary block structure */ 515struct f2fs_summary_block { 516 struct f2fs_summary entries[ENTRIES_IN_SUM]; 517 union { 518 __le16 n_nats; 519 __le16 n_sits; 520 }; 521 /* spare area is used by NAT or SIT journals */ 522 union { 523 struct nat_journal nat_j; 524 struct sit_journal sit_j; 525 }; 526 struct summary_footer footer; 527} __attribute__((packed)); 528 529/* 530 * For directory operations 531 */ 532#define F2FS_DOT_HASH 0 533#define F2FS_DDOT_HASH F2FS_DOT_HASH 534#define F2FS_MAX_HASH (~((0x3ULL) << 62)) 535#define F2FS_HASH_COL_BIT ((0x1ULL) << 63) 536 537typedef __le32 f2fs_hash_t; 538 539/* One directory entry slot covers 8bytes-long file name */ 540#define F2FS_SLOT_LEN 8 541#define F2FS_SLOT_LEN_BITS 3 542 543#define GET_DENTRY_SLOTS(x) ((x + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS) 544 545/* the number of dentry in a block */ 546#define NR_DENTRY_IN_BLOCK 214 547 548/* MAX level for dir lookup */ 549#define MAX_DIR_HASH_DEPTH 63 550 551#define SIZE_OF_DIR_ENTRY 11 /* by byte */ 552#define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ 553 BITS_PER_BYTE) 554#define SIZE_OF_RESERVED (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \ 555 F2FS_SLOT_LEN) * \ 556 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP)) 557 558/* One directory entry slot representing F2FS_SLOT_LEN-sized file name */ 559struct f2fs_dir_entry { 560 __le32 hash_code; /* hash code of file name */ 561 __le32 ino; /* inode number */ 562 __le16 name_len; /* lengh of file name */ 563 __u8 file_type; /* file type */ 564} __attribute__((packed)); 565 566/* 4KB-sized directory entry block */ 567struct f2fs_dentry_block { 568 /* validity bitmap for directory entries in each block */ 569 __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP]; 570 __u8 reserved[SIZE_OF_RESERVED]; 571 struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK]; 572 __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN]; 573} __attribute__((packed)); 574 575/* file types used in inode_info->flags */ 576enum { 577 F2FS_FT_UNKNOWN, 578 F2FS_FT_REG_FILE, 579 F2FS_FT_DIR, 580 F2FS_FT_CHRDEV, 581 F2FS_FT_BLKDEV, 582 F2FS_FT_FIFO, 583 F2FS_FT_SOCK, 584 F2FS_FT_SYMLINK, 585 F2FS_FT_MAX 586}; 587 588void ASCIIToUNICODE(u_int16_t *, u_int8_t *); 589int log_base_2(u_int32_t); 590 591int f2fs_test_bit(unsigned int, const char *); 592int f2fs_set_bit(unsigned int, unsigned char *); 593int f2fs_clear_bit(unsigned int, char *); 594 595u_int32_t f2fs_cal_crc32(u_int32_t, void *, int); 596 597void f2fs_init_configuration(struct f2fs_configuration *); 598int f2fs_dev_is_mounted(struct f2fs_configuration *); 599int f2fs_get_device_info(struct f2fs_configuration *); 600 601int dev_read(void *, __u64, size_t); 602int dev_write(void *, __u64, size_t); 603 604int dev_read_block(void *, __u64); 605int dev_read_blocks(void *, __u64, __u32 ); 606 607#endif /*__F2FS_FS_H */ 608