1 /** 2 * include/linux/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 _LINUX_F2FS_FS_H 12 #define _LINUX_F2FS_FS_H 13 14 #include <linux/pagemap.h> 15 #include <linux/types.h> 16 17 #define F2FS_SUPER_OFFSET 1024 /* byte-size offset */ 18 #define F2FS_MIN_LOG_SECTOR_SIZE 9 /* 9 bits for 512 bytes */ 19 #define F2FS_MAX_LOG_SECTOR_SIZE 12 /* 12 bits for 4096 bytes */ 20 #define F2FS_LOG_SECTORS_PER_BLOCK 3 /* log number for sector/blk */ 21 #define F2FS_BLKSIZE 4096 /* support only 4KB block */ 22 #define F2FS_BLKSIZE_BITS 12 /* bits for F2FS_BLKSIZE */ 23 #define F2FS_MAX_EXTENSION 64 /* # of extension entries */ 24 #define F2FS_BLK_ALIGN(x) (((x) + F2FS_BLKSIZE - 1) >> F2FS_BLKSIZE_BITS) 25 26 #define NULL_ADDR ((block_t)0) /* used as block_t addresses */ 27 #define NEW_ADDR ((block_t)-1) /* used as block_t addresses */ 28 29 #define F2FS_BYTES_TO_BLK(bytes) ((bytes) >> F2FS_BLKSIZE_BITS) 30 #define F2FS_BLK_TO_BYTES(blk) ((blk) << F2FS_BLKSIZE_BITS) 31 32 /* 0, 1(node nid), 2(meta nid) are reserved node id */ 33 #define F2FS_RESERVED_NODE_NUM 3 34 35 #define F2FS_ROOT_INO(sbi) (sbi->root_ino_num) 36 #define F2FS_NODE_INO(sbi) (sbi->node_ino_num) 37 #define F2FS_META_INO(sbi) (sbi->meta_ino_num) 38 39 #define F2FS_IO_SIZE(sbi) (1 << (sbi)->write_io_size_bits) /* Blocks */ 40 #define F2FS_IO_SIZE_KB(sbi) (1 << ((sbi)->write_io_size_bits + 2)) /* KB */ 41 #define F2FS_IO_SIZE_BYTES(sbi) (1 << ((sbi)->write_io_size_bits + 12)) /* B */ 42 #define F2FS_IO_SIZE_BITS(sbi) ((sbi)->write_io_size_bits) /* power of 2 */ 43 #define F2FS_IO_SIZE_MASK(sbi) (F2FS_IO_SIZE(sbi) - 1) 44 45 /* This flag is used by node and meta inodes, and by recovery */ 46 #define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO) 47 #define GFP_F2FS_HIGH_ZERO (GFP_NOFS | __GFP_ZERO | __GFP_HIGHMEM) 48 49 /* 50 * For further optimization on multi-head logs, on-disk layout supports maximum 51 * 16 logs by default. The number, 16, is expected to cover all the cases 52 * enoughly. The implementaion currently uses no more than 6 logs. 53 * Half the logs are used for nodes, and the other half are used for data. 54 */ 55 #define MAX_ACTIVE_LOGS 16 56 #define MAX_ACTIVE_NODE_LOGS 8 57 #define MAX_ACTIVE_DATA_LOGS 8 58 59 #define VERSION_LEN 256 60 #define MAX_VOLUME_NAME 512 61 #define MAX_PATH_LEN 64 62 #define MAX_DEVICES 8 63 64 /* 65 * For superblock 66 */ 67 struct f2fs_device { 68 __u8 path[MAX_PATH_LEN]; 69 __le32 total_segments; 70 } __packed; 71 72 struct f2fs_super_block { 73 __le32 magic; /* Magic Number */ 74 __le16 major_ver; /* Major Version */ 75 __le16 minor_ver; /* Minor Version */ 76 __le32 log_sectorsize; /* log2 sector size in bytes */ 77 __le32 log_sectors_per_block; /* log2 # of sectors per block */ 78 __le32 log_blocksize; /* log2 block size in bytes */ 79 __le32 log_blocks_per_seg; /* log2 # of blocks per segment */ 80 __le32 segs_per_sec; /* # of segments per section */ 81 __le32 secs_per_zone; /* # of sections per zone */ 82 __le32 checksum_offset; /* checksum offset inside super block */ 83 __le64 block_count; /* total # of user blocks */ 84 __le32 section_count; /* total # of sections */ 85 __le32 segment_count; /* total # of segments */ 86 __le32 segment_count_ckpt; /* # of segments for checkpoint */ 87 __le32 segment_count_sit; /* # of segments for SIT */ 88 __le32 segment_count_nat; /* # of segments for NAT */ 89 __le32 segment_count_ssa; /* # of segments for SSA */ 90 __le32 segment_count_main; /* # of segments for main area */ 91 __le32 segment0_blkaddr; /* start block address of segment 0 */ 92 __le32 cp_blkaddr; /* start block address of checkpoint */ 93 __le32 sit_blkaddr; /* start block address of SIT */ 94 __le32 nat_blkaddr; /* start block address of NAT */ 95 __le32 ssa_blkaddr; /* start block address of SSA */ 96 __le32 main_blkaddr; /* start block address of main area */ 97 __le32 root_ino; /* root inode number */ 98 __le32 node_ino; /* node inode number */ 99 __le32 meta_ino; /* meta inode number */ 100 __u8 uuid[16]; /* 128-bit uuid for volume */ 101 __le16 volume_name[MAX_VOLUME_NAME]; /* volume name */ 102 __le32 extension_count; /* # of extensions below */ 103 __u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */ 104 __le32 cp_payload; 105 __u8 version[VERSION_LEN]; /* the kernel version */ 106 __u8 init_version[VERSION_LEN]; /* the initial kernel version */ 107 __le32 feature; /* defined features */ 108 __u8 encryption_level; /* versioning level for encryption */ 109 __u8 encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 110 struct f2fs_device devs[MAX_DEVICES]; /* device list */ 111 __u8 reserved[327]; /* valid reserved region */ 112 } __packed; 113 114 /* 115 * For checkpoint 116 */ 117 #define CP_NAT_BITS_FLAG 0x00000080 118 #define CP_CRC_RECOVERY_FLAG 0x00000040 119 #define CP_FASTBOOT_FLAG 0x00000020 120 #define CP_FSCK_FLAG 0x00000010 121 #define CP_ERROR_FLAG 0x00000008 122 #define CP_COMPACT_SUM_FLAG 0x00000004 123 #define CP_ORPHAN_PRESENT_FLAG 0x00000002 124 #define CP_UMOUNT_FLAG 0x00000001 125 126 #define F2FS_CP_PACKS 2 /* # of checkpoint packs */ 127 128 struct f2fs_checkpoint { 129 __le64 checkpoint_ver; /* checkpoint block version number */ 130 __le64 user_block_count; /* # of user blocks */ 131 __le64 valid_block_count; /* # of valid blocks in main area */ 132 __le32 rsvd_segment_count; /* # of reserved segments for gc */ 133 __le32 overprov_segment_count; /* # of overprovision segments */ 134 __le32 free_segment_count; /* # of free segments in main area */ 135 136 /* information of current node segments */ 137 __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS]; 138 __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS]; 139 /* information of current data segments */ 140 __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS]; 141 __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS]; 142 __le32 ckpt_flags; /* Flags : umount and journal_present */ 143 __le32 cp_pack_total_block_count; /* total # of one cp pack */ 144 __le32 cp_pack_start_sum; /* start block number of data summary */ 145 __le32 valid_node_count; /* Total number of valid nodes */ 146 __le32 valid_inode_count; /* Total number of valid inodes */ 147 __le32 next_free_nid; /* Next free node number */ 148 __le32 sit_ver_bitmap_bytesize; /* Default value 64 */ 149 __le32 nat_ver_bitmap_bytesize; /* Default value 256 */ 150 __le32 checksum_offset; /* checksum offset inside cp block */ 151 __le64 elapsed_time; /* mounted time */ 152 /* allocation type of current segment */ 153 unsigned char alloc_type[MAX_ACTIVE_LOGS]; 154 155 /* SIT and NAT version bitmap */ 156 unsigned char sit_nat_version_bitmap[1]; 157 } __packed; 158 159 /* 160 * For orphan inode management 161 */ 162 #define F2FS_ORPHANS_PER_BLOCK 1020 163 164 #define GET_ORPHAN_BLOCKS(n) ((n + F2FS_ORPHANS_PER_BLOCK - 1) / \ 165 F2FS_ORPHANS_PER_BLOCK) 166 167 struct f2fs_orphan_block { 168 __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */ 169 __le32 reserved; /* reserved */ 170 __le16 blk_addr; /* block index in current CP */ 171 __le16 blk_count; /* Number of orphan inode blocks in CP */ 172 __le32 entry_count; /* Total number of orphan nodes in current CP */ 173 __le32 check_sum; /* CRC32 for orphan inode block */ 174 } __packed; 175 176 /* 177 * For NODE structure 178 */ 179 struct f2fs_extent { 180 __le32 fofs; /* start file offset of the extent */ 181 __le32 blk; /* start block address of the extent */ 182 __le32 len; /* lengh of the extent */ 183 } __packed; 184 185 #define F2FS_NAME_LEN 255 186 #define F2FS_INLINE_XATTR_ADDRS 50 /* 200 bytes for inline xattrs */ 187 #define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */ 188 #define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */ 189 #define ADDRS_PER_INODE(inode) addrs_per_inode(inode) 190 #define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */ 191 #define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */ 192 193 #define ADDRS_PER_PAGE(page, inode) \ 194 (IS_INODE(page) ? ADDRS_PER_INODE(inode) : ADDRS_PER_BLOCK) 195 196 #define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1) 197 #define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2) 198 #define NODE_IND1_BLOCK (DEF_ADDRS_PER_INODE + 3) 199 #define NODE_IND2_BLOCK (DEF_ADDRS_PER_INODE + 4) 200 #define NODE_DIND_BLOCK (DEF_ADDRS_PER_INODE + 5) 201 202 #define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */ 203 #define F2FS_INLINE_DATA 0x02 /* file inline data flag */ 204 #define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */ 205 #define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */ 206 #define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */ 207 208 #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ 209 F2FS_INLINE_XATTR_ADDRS - 1)) 210 211 struct f2fs_inode { 212 __le16 i_mode; /* file mode */ 213 __u8 i_advise; /* file hints */ 214 __u8 i_inline; /* file inline flags */ 215 __le32 i_uid; /* user ID */ 216 __le32 i_gid; /* group ID */ 217 __le32 i_links; /* links count */ 218 __le64 i_size; /* file size in bytes */ 219 __le64 i_blocks; /* file size in blocks */ 220 __le64 i_atime; /* access time */ 221 __le64 i_ctime; /* change time */ 222 __le64 i_mtime; /* modification time */ 223 __le32 i_atime_nsec; /* access time in nano scale */ 224 __le32 i_ctime_nsec; /* change time in nano scale */ 225 __le32 i_mtime_nsec; /* modification time in nano scale */ 226 __le32 i_generation; /* file version (for NFS) */ 227 __le32 i_current_depth; /* only for directory depth */ 228 __le32 i_xattr_nid; /* nid to save xattr */ 229 __le32 i_flags; /* file attributes */ 230 __le32 i_pino; /* parent inode number */ 231 __le32 i_namelen; /* file name length */ 232 __u8 i_name[F2FS_NAME_LEN]; /* file name for SPOR */ 233 __u8 i_dir_level; /* dentry_level for large dir */ 234 235 struct f2fs_extent i_ext; /* caching a largest extent */ 236 237 __le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */ 238 239 __le32 i_nid[DEF_NIDS_PER_INODE]; /* direct(2), indirect(2), 240 double_indirect(1) node id */ 241 } __packed; 242 243 struct direct_node { 244 __le32 addr[ADDRS_PER_BLOCK]; /* array of data block address */ 245 } __packed; 246 247 struct indirect_node { 248 __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */ 249 } __packed; 250 251 enum { 252 COLD_BIT_SHIFT = 0, 253 FSYNC_BIT_SHIFT, 254 DENT_BIT_SHIFT, 255 OFFSET_BIT_SHIFT 256 }; 257 258 #define OFFSET_BIT_MASK (0x07) /* (0x01 << OFFSET_BIT_SHIFT) - 1 */ 259 260 struct node_footer { 261 __le32 nid; /* node id */ 262 __le32 ino; /* inode nunmber */ 263 __le32 flag; /* include cold/fsync/dentry marks and offset */ 264 __le64 cp_ver; /* checkpoint version */ 265 __le32 next_blkaddr; /* next node page block address */ 266 } __packed; 267 268 struct f2fs_node { 269 /* can be one of three types: inode, direct, and indirect types */ 270 union { 271 struct f2fs_inode i; 272 struct direct_node dn; 273 struct indirect_node in; 274 }; 275 struct node_footer footer; 276 } __packed; 277 278 /* 279 * For NAT entries 280 */ 281 #define NAT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_nat_entry)) 282 #define NAT_ENTRY_BITMAP_SIZE ((NAT_ENTRY_PER_BLOCK + 7) / 8) 283 284 struct f2fs_nat_entry { 285 __u8 version; /* latest version of cached nat entry */ 286 __le32 ino; /* inode number */ 287 __le32 block_addr; /* block address */ 288 } __packed; 289 290 struct f2fs_nat_block { 291 struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK]; 292 } __packed; 293 294 /* 295 * For SIT entries 296 * 297 * Each segment is 2MB in size by default so that a bitmap for validity of 298 * there-in blocks should occupy 64 bytes, 512 bits. 299 * Not allow to change this. 300 */ 301 #define SIT_VBLOCK_MAP_SIZE 64 302 #define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry)) 303 304 /* 305 * Note that f2fs_sit_entry->vblocks has the following bit-field information. 306 * [15:10] : allocation type such as CURSEG_XXXX_TYPE 307 * [9:0] : valid block count 308 */ 309 #define SIT_VBLOCKS_SHIFT 10 310 #define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1) 311 #define GET_SIT_VBLOCKS(raw_sit) \ 312 (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK) 313 #define GET_SIT_TYPE(raw_sit) \ 314 ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \ 315 >> SIT_VBLOCKS_SHIFT) 316 317 struct f2fs_sit_entry { 318 __le16 vblocks; /* reference above */ 319 __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */ 320 __le64 mtime; /* segment age for cleaning */ 321 } __packed; 322 323 struct f2fs_sit_block { 324 struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK]; 325 } __packed; 326 327 /* 328 * For segment summary 329 * 330 * One summary block contains exactly 512 summary entries, which represents 331 * exactly 2MB segment by default. Not allow to change the basic units. 332 * 333 * NOTE: For initializing fields, you must use set_summary 334 * 335 * - If data page, nid represents dnode's nid 336 * - If node page, nid represents the node page's nid. 337 * 338 * The ofs_in_node is used by only data page. It represents offset 339 * from node's page's beginning to get a data block address. 340 * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node) 341 */ 342 #define ENTRIES_IN_SUM 512 343 #define SUMMARY_SIZE (7) /* sizeof(struct summary) */ 344 #define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */ 345 #define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM) 346 347 /* a summary entry for a 4KB-sized block in a segment */ 348 struct f2fs_summary { 349 __le32 nid; /* parent node id */ 350 union { 351 __u8 reserved[3]; 352 struct { 353 __u8 version; /* node version number */ 354 __le16 ofs_in_node; /* block index in parent node */ 355 } __packed; 356 }; 357 } __packed; 358 359 /* summary block type, node or data, is stored to the summary_footer */ 360 #define SUM_TYPE_NODE (1) 361 #define SUM_TYPE_DATA (0) 362 363 struct summary_footer { 364 unsigned char entry_type; /* SUM_TYPE_XXX */ 365 __le32 check_sum; /* summary checksum */ 366 } __packed; 367 368 #define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\ 369 SUM_ENTRY_SIZE) 370 #define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 371 sizeof(struct nat_journal_entry)) 372 #define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 373 sizeof(struct nat_journal_entry)) 374 #define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 375 sizeof(struct sit_journal_entry)) 376 #define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 377 sizeof(struct sit_journal_entry)) 378 379 /* Reserved area should make size of f2fs_extra_info equals to 380 * that of nat_journal and sit_journal. 381 */ 382 #define EXTRA_INFO_RESERVED (SUM_JOURNAL_SIZE - 2 - 8) 383 384 /* 385 * frequently updated NAT/SIT entries can be stored in the spare area in 386 * summary blocks 387 */ 388 enum { 389 NAT_JOURNAL = 0, 390 SIT_JOURNAL 391 }; 392 393 struct nat_journal_entry { 394 __le32 nid; 395 struct f2fs_nat_entry ne; 396 } __packed; 397 398 struct nat_journal { 399 struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES]; 400 __u8 reserved[NAT_JOURNAL_RESERVED]; 401 } __packed; 402 403 struct sit_journal_entry { 404 __le32 segno; 405 struct f2fs_sit_entry se; 406 } __packed; 407 408 struct sit_journal { 409 struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES]; 410 __u8 reserved[SIT_JOURNAL_RESERVED]; 411 } __packed; 412 413 struct f2fs_extra_info { 414 __le64 kbytes_written; 415 __u8 reserved[EXTRA_INFO_RESERVED]; 416 } __packed; 417 418 struct f2fs_journal { 419 union { 420 __le16 n_nats; 421 __le16 n_sits; 422 }; 423 /* spare area is used by NAT or SIT journals or extra info */ 424 union { 425 struct nat_journal nat_j; 426 struct sit_journal sit_j; 427 struct f2fs_extra_info info; 428 }; 429 } __packed; 430 431 /* 4KB-sized summary block structure */ 432 struct f2fs_summary_block { 433 struct f2fs_summary entries[ENTRIES_IN_SUM]; 434 struct f2fs_journal journal; 435 struct summary_footer footer; 436 } __packed; 437 438 /* 439 * For directory operations 440 */ 441 #define F2FS_DOT_HASH 0 442 #define F2FS_DDOT_HASH F2FS_DOT_HASH 443 #define F2FS_MAX_HASH (~((0x3ULL) << 62)) 444 #define F2FS_HASH_COL_BIT ((0x1ULL) << 63) 445 446 typedef __le32 f2fs_hash_t; 447 448 /* One directory entry slot covers 8bytes-long file name */ 449 #define F2FS_SLOT_LEN 8 450 #define F2FS_SLOT_LEN_BITS 3 451 452 #define GET_DENTRY_SLOTS(x) ((x + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS) 453 454 /* MAX level for dir lookup */ 455 #define MAX_DIR_HASH_DEPTH 63 456 457 /* MAX buckets in one level of dir */ 458 #define MAX_DIR_BUCKETS (1 << ((MAX_DIR_HASH_DEPTH / 2) - 1)) 459 460 /* 461 * space utilization of regular dentry and inline dentry 462 * regular dentry inline dentry 463 * bitmap 1 * 27 = 27 1 * 23 = 23 464 * reserved 1 * 3 = 3 1 * 7 = 7 465 * dentry 11 * 214 = 2354 11 * 182 = 2002 466 * filename 8 * 214 = 1712 8 * 182 = 1456 467 * total 4096 3488 468 * 469 * Note: there are more reserved space in inline dentry than in regular 470 * dentry, when converting inline dentry we should handle this carefully. 471 */ 472 #define NR_DENTRY_IN_BLOCK 214 /* the number of dentry in a block */ 473 #define SIZE_OF_DIR_ENTRY 11 /* by byte */ 474 #define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ 475 BITS_PER_BYTE) 476 #define SIZE_OF_RESERVED (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \ 477 F2FS_SLOT_LEN) * \ 478 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP)) 479 480 /* One directory entry slot representing F2FS_SLOT_LEN-sized file name */ 481 struct f2fs_dir_entry { 482 __le32 hash_code; /* hash code of file name */ 483 __le32 ino; /* inode number */ 484 __le16 name_len; /* lengh of file name */ 485 __u8 file_type; /* file type */ 486 } __packed; 487 488 /* 4KB-sized directory entry block */ 489 struct f2fs_dentry_block { 490 /* validity bitmap for directory entries in each block */ 491 __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP]; 492 __u8 reserved[SIZE_OF_RESERVED]; 493 struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK]; 494 __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN]; 495 } __packed; 496 497 /* for inline dir */ 498 #define NR_INLINE_DENTRY (MAX_INLINE_DATA * BITS_PER_BYTE / \ 499 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ 500 BITS_PER_BYTE + 1)) 501 #define INLINE_DENTRY_BITMAP_SIZE ((NR_INLINE_DENTRY + \ 502 BITS_PER_BYTE - 1) / BITS_PER_BYTE) 503 #define INLINE_RESERVED_SIZE (MAX_INLINE_DATA - \ 504 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ 505 NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE)) 506 507 /* inline directory entry structure */ 508 struct f2fs_inline_dentry { 509 __u8 dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE]; 510 __u8 reserved[INLINE_RESERVED_SIZE]; 511 struct f2fs_dir_entry dentry[NR_INLINE_DENTRY]; 512 __u8 filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN]; 513 } __packed; 514 515 /* file types used in inode_info->flags */ 516 enum { 517 F2FS_FT_UNKNOWN, 518 F2FS_FT_REG_FILE, 519 F2FS_FT_DIR, 520 F2FS_FT_CHRDEV, 521 F2FS_FT_BLKDEV, 522 F2FS_FT_FIFO, 523 F2FS_FT_SOCK, 524 F2FS_FT_SYMLINK, 525 F2FS_FT_MAX 526 }; 527 528 #define S_SHIFT 12 529 530 #endif /* _LINUX_F2FS_FS_H */ 531