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_TRIMMED_FLAG 0x00000100 118 #define CP_NAT_BITS_FLAG 0x00000080 119 #define CP_CRC_RECOVERY_FLAG 0x00000040 120 #define CP_FASTBOOT_FLAG 0x00000020 121 #define CP_FSCK_FLAG 0x00000010 122 #define CP_ERROR_FLAG 0x00000008 123 #define CP_COMPACT_SUM_FLAG 0x00000004 124 #define CP_ORPHAN_PRESENT_FLAG 0x00000002 125 #define CP_UMOUNT_FLAG 0x00000001 126 127 #define F2FS_CP_PACKS 2 /* # of checkpoint packs */ 128 129 struct f2fs_checkpoint { 130 __le64 checkpoint_ver; /* checkpoint block version number */ 131 __le64 user_block_count; /* # of user blocks */ 132 __le64 valid_block_count; /* # of valid blocks in main area */ 133 __le32 rsvd_segment_count; /* # of reserved segments for gc */ 134 __le32 overprov_segment_count; /* # of overprovision segments */ 135 __le32 free_segment_count; /* # of free segments in main area */ 136 137 /* information of current node segments */ 138 __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS]; 139 __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS]; 140 /* information of current data segments */ 141 __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS]; 142 __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS]; 143 __le32 ckpt_flags; /* Flags : umount and journal_present */ 144 __le32 cp_pack_total_block_count; /* total # of one cp pack */ 145 __le32 cp_pack_start_sum; /* start block number of data summary */ 146 __le32 valid_node_count; /* Total number of valid nodes */ 147 __le32 valid_inode_count; /* Total number of valid inodes */ 148 __le32 next_free_nid; /* Next free node number */ 149 __le32 sit_ver_bitmap_bytesize; /* Default value 64 */ 150 __le32 nat_ver_bitmap_bytesize; /* Default value 256 */ 151 __le32 checksum_offset; /* checksum offset inside cp block */ 152 __le64 elapsed_time; /* mounted time */ 153 /* allocation type of current segment */ 154 unsigned char alloc_type[MAX_ACTIVE_LOGS]; 155 156 /* SIT and NAT version bitmap */ 157 unsigned char sit_nat_version_bitmap[1]; 158 } __packed; 159 160 /* 161 * For orphan inode management 162 */ 163 #define F2FS_ORPHANS_PER_BLOCK 1020 164 165 #define GET_ORPHAN_BLOCKS(n) (((n) + F2FS_ORPHANS_PER_BLOCK - 1) / \ 166 F2FS_ORPHANS_PER_BLOCK) 167 168 struct f2fs_orphan_block { 169 __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */ 170 __le32 reserved; /* reserved */ 171 __le16 blk_addr; /* block index in current CP */ 172 __le16 blk_count; /* Number of orphan inode blocks in CP */ 173 __le32 entry_count; /* Total number of orphan nodes in current CP */ 174 __le32 check_sum; /* CRC32 for orphan inode block */ 175 } __packed; 176 177 /* 178 * For NODE structure 179 */ 180 struct f2fs_extent { 181 __le32 fofs; /* start file offset of the extent */ 182 __le32 blk; /* start block address of the extent */ 183 __le32 len; /* lengh of the extent */ 184 } __packed; 185 186 #define F2FS_NAME_LEN 255 187 #define F2FS_INLINE_XATTR_ADDRS 50 /* 200 bytes for inline xattrs */ 188 #define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */ 189 #define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */ 190 #define ADDRS_PER_INODE(inode) addrs_per_inode(inode) 191 #define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */ 192 #define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */ 193 194 #define ADDRS_PER_PAGE(page, inode) \ 195 (IS_INODE(page) ? ADDRS_PER_INODE(inode) : ADDRS_PER_BLOCK) 196 197 #define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1) 198 #define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2) 199 #define NODE_IND1_BLOCK (DEF_ADDRS_PER_INODE + 3) 200 #define NODE_IND2_BLOCK (DEF_ADDRS_PER_INODE + 4) 201 #define NODE_DIND_BLOCK (DEF_ADDRS_PER_INODE + 5) 202 203 #define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */ 204 #define F2FS_INLINE_DATA 0x02 /* file inline data flag */ 205 #define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */ 206 #define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */ 207 #define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */ 208 209 #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ 210 F2FS_INLINE_XATTR_ADDRS - 1)) 211 212 struct f2fs_inode { 213 __le16 i_mode; /* file mode */ 214 __u8 i_advise; /* file hints */ 215 __u8 i_inline; /* file inline flags */ 216 __le32 i_uid; /* user ID */ 217 __le32 i_gid; /* group ID */ 218 __le32 i_links; /* links count */ 219 __le64 i_size; /* file size in bytes */ 220 __le64 i_blocks; /* file size in blocks */ 221 __le64 i_atime; /* access time */ 222 __le64 i_ctime; /* change time */ 223 __le64 i_mtime; /* modification time */ 224 __le32 i_atime_nsec; /* access time in nano scale */ 225 __le32 i_ctime_nsec; /* change time in nano scale */ 226 __le32 i_mtime_nsec; /* modification time in nano scale */ 227 __le32 i_generation; /* file version (for NFS) */ 228 __le32 i_current_depth; /* only for directory depth */ 229 __le32 i_xattr_nid; /* nid to save xattr */ 230 __le32 i_flags; /* file attributes */ 231 __le32 i_pino; /* parent inode number */ 232 __le32 i_namelen; /* file name length */ 233 __u8 i_name[F2FS_NAME_LEN]; /* file name for SPOR */ 234 __u8 i_dir_level; /* dentry_level for large dir */ 235 236 struct f2fs_extent i_ext; /* caching a largest extent */ 237 238 __le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */ 239 240 __le32 i_nid[DEF_NIDS_PER_INODE]; /* direct(2), indirect(2), 241 double_indirect(1) node id */ 242 } __packed; 243 244 struct direct_node { 245 __le32 addr[ADDRS_PER_BLOCK]; /* array of data block address */ 246 } __packed; 247 248 struct indirect_node { 249 __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */ 250 } __packed; 251 252 enum { 253 COLD_BIT_SHIFT = 0, 254 FSYNC_BIT_SHIFT, 255 DENT_BIT_SHIFT, 256 OFFSET_BIT_SHIFT 257 }; 258 259 #define OFFSET_BIT_MASK (0x07) /* (0x01 << OFFSET_BIT_SHIFT) - 1 */ 260 261 struct node_footer { 262 __le32 nid; /* node id */ 263 __le32 ino; /* inode nunmber */ 264 __le32 flag; /* include cold/fsync/dentry marks and offset */ 265 __le64 cp_ver; /* checkpoint version */ 266 __le32 next_blkaddr; /* next node page block address */ 267 } __packed; 268 269 struct f2fs_node { 270 /* can be one of three types: inode, direct, and indirect types */ 271 union { 272 struct f2fs_inode i; 273 struct direct_node dn; 274 struct indirect_node in; 275 }; 276 struct node_footer footer; 277 } __packed; 278 279 /* 280 * For NAT entries 281 */ 282 #define NAT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_nat_entry)) 283 #define NAT_ENTRY_BITMAP_SIZE ((NAT_ENTRY_PER_BLOCK + 7) / 8) 284 285 struct f2fs_nat_entry { 286 __u8 version; /* latest version of cached nat entry */ 287 __le32 ino; /* inode number */ 288 __le32 block_addr; /* block address */ 289 } __packed; 290 291 struct f2fs_nat_block { 292 struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK]; 293 } __packed; 294 295 /* 296 * For SIT entries 297 * 298 * Each segment is 2MB in size by default so that a bitmap for validity of 299 * there-in blocks should occupy 64 bytes, 512 bits. 300 * Not allow to change this. 301 */ 302 #define SIT_VBLOCK_MAP_SIZE 64 303 #define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry)) 304 305 /* 306 * F2FS uses 4 bytes to represent block address. As a result, supported size of 307 * disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments. 308 */ 309 #define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2) 310 311 /* 312 * Note that f2fs_sit_entry->vblocks has the following bit-field information. 313 * [15:10] : allocation type such as CURSEG_XXXX_TYPE 314 * [9:0] : valid block count 315 */ 316 #define SIT_VBLOCKS_SHIFT 10 317 #define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1) 318 #define GET_SIT_VBLOCKS(raw_sit) \ 319 (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK) 320 #define GET_SIT_TYPE(raw_sit) \ 321 ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \ 322 >> SIT_VBLOCKS_SHIFT) 323 324 struct f2fs_sit_entry { 325 __le16 vblocks; /* reference above */ 326 __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */ 327 __le64 mtime; /* segment age for cleaning */ 328 } __packed; 329 330 struct f2fs_sit_block { 331 struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK]; 332 } __packed; 333 334 /* 335 * For segment summary 336 * 337 * One summary block contains exactly 512 summary entries, which represents 338 * exactly 2MB segment by default. Not allow to change the basic units. 339 * 340 * NOTE: For initializing fields, you must use set_summary 341 * 342 * - If data page, nid represents dnode's nid 343 * - If node page, nid represents the node page's nid. 344 * 345 * The ofs_in_node is used by only data page. It represents offset 346 * from node's page's beginning to get a data block address. 347 * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node) 348 */ 349 #define ENTRIES_IN_SUM 512 350 #define SUMMARY_SIZE (7) /* sizeof(struct summary) */ 351 #define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */ 352 #define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM) 353 354 /* a summary entry for a 4KB-sized block in a segment */ 355 struct f2fs_summary { 356 __le32 nid; /* parent node id */ 357 union { 358 __u8 reserved[3]; 359 struct { 360 __u8 version; /* node version number */ 361 __le16 ofs_in_node; /* block index in parent node */ 362 } __packed; 363 }; 364 } __packed; 365 366 /* summary block type, node or data, is stored to the summary_footer */ 367 #define SUM_TYPE_NODE (1) 368 #define SUM_TYPE_DATA (0) 369 370 struct summary_footer { 371 unsigned char entry_type; /* SUM_TYPE_XXX */ 372 __le32 check_sum; /* summary checksum */ 373 } __packed; 374 375 #define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\ 376 SUM_ENTRY_SIZE) 377 #define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 378 sizeof(struct nat_journal_entry)) 379 #define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 380 sizeof(struct nat_journal_entry)) 381 #define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\ 382 sizeof(struct sit_journal_entry)) 383 #define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ 384 sizeof(struct sit_journal_entry)) 385 386 /* Reserved area should make size of f2fs_extra_info equals to 387 * that of nat_journal and sit_journal. 388 */ 389 #define EXTRA_INFO_RESERVED (SUM_JOURNAL_SIZE - 2 - 8) 390 391 /* 392 * frequently updated NAT/SIT entries can be stored in the spare area in 393 * summary blocks 394 */ 395 enum { 396 NAT_JOURNAL = 0, 397 SIT_JOURNAL 398 }; 399 400 struct nat_journal_entry { 401 __le32 nid; 402 struct f2fs_nat_entry ne; 403 } __packed; 404 405 struct nat_journal { 406 struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES]; 407 __u8 reserved[NAT_JOURNAL_RESERVED]; 408 } __packed; 409 410 struct sit_journal_entry { 411 __le32 segno; 412 struct f2fs_sit_entry se; 413 } __packed; 414 415 struct sit_journal { 416 struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES]; 417 __u8 reserved[SIT_JOURNAL_RESERVED]; 418 } __packed; 419 420 struct f2fs_extra_info { 421 __le64 kbytes_written; 422 __u8 reserved[EXTRA_INFO_RESERVED]; 423 } __packed; 424 425 struct f2fs_journal { 426 union { 427 __le16 n_nats; 428 __le16 n_sits; 429 }; 430 /* spare area is used by NAT or SIT journals or extra info */ 431 union { 432 struct nat_journal nat_j; 433 struct sit_journal sit_j; 434 struct f2fs_extra_info info; 435 }; 436 } __packed; 437 438 /* 4KB-sized summary block structure */ 439 struct f2fs_summary_block { 440 struct f2fs_summary entries[ENTRIES_IN_SUM]; 441 struct f2fs_journal journal; 442 struct summary_footer footer; 443 } __packed; 444 445 /* 446 * For directory operations 447 */ 448 #define F2FS_DOT_HASH 0 449 #define F2FS_DDOT_HASH F2FS_DOT_HASH 450 #define F2FS_MAX_HASH (~((0x3ULL) << 62)) 451 #define F2FS_HASH_COL_BIT ((0x1ULL) << 63) 452 453 typedef __le32 f2fs_hash_t; 454 455 /* One directory entry slot covers 8bytes-long file name */ 456 #define F2FS_SLOT_LEN 8 457 #define F2FS_SLOT_LEN_BITS 3 458 459 #define GET_DENTRY_SLOTS(x) (((x) + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS) 460 461 /* MAX level for dir lookup */ 462 #define MAX_DIR_HASH_DEPTH 63 463 464 /* MAX buckets in one level of dir */ 465 #define MAX_DIR_BUCKETS (1 << ((MAX_DIR_HASH_DEPTH / 2) - 1)) 466 467 /* 468 * space utilization of regular dentry and inline dentry 469 * regular dentry inline dentry 470 * bitmap 1 * 27 = 27 1 * 23 = 23 471 * reserved 1 * 3 = 3 1 * 7 = 7 472 * dentry 11 * 214 = 2354 11 * 182 = 2002 473 * filename 8 * 214 = 1712 8 * 182 = 1456 474 * total 4096 3488 475 * 476 * Note: there are more reserved space in inline dentry than in regular 477 * dentry, when converting inline dentry we should handle this carefully. 478 */ 479 #define NR_DENTRY_IN_BLOCK 214 /* the number of dentry in a block */ 480 #define SIZE_OF_DIR_ENTRY 11 /* by byte */ 481 #define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ 482 BITS_PER_BYTE) 483 #define SIZE_OF_RESERVED (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \ 484 F2FS_SLOT_LEN) * \ 485 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP)) 486 487 /* One directory entry slot representing F2FS_SLOT_LEN-sized file name */ 488 struct f2fs_dir_entry { 489 __le32 hash_code; /* hash code of file name */ 490 __le32 ino; /* inode number */ 491 __le16 name_len; /* lengh of file name */ 492 __u8 file_type; /* file type */ 493 } __packed; 494 495 /* 4KB-sized directory entry block */ 496 struct f2fs_dentry_block { 497 /* validity bitmap for directory entries in each block */ 498 __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP]; 499 __u8 reserved[SIZE_OF_RESERVED]; 500 struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK]; 501 __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN]; 502 } __packed; 503 504 /* for inline dir */ 505 #define NR_INLINE_DENTRY (MAX_INLINE_DATA * BITS_PER_BYTE / \ 506 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ 507 BITS_PER_BYTE + 1)) 508 #define INLINE_DENTRY_BITMAP_SIZE ((NR_INLINE_DENTRY + \ 509 BITS_PER_BYTE - 1) / BITS_PER_BYTE) 510 #define INLINE_RESERVED_SIZE (MAX_INLINE_DATA - \ 511 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ 512 NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE)) 513 514 /* inline directory entry structure */ 515 struct f2fs_inline_dentry { 516 __u8 dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE]; 517 __u8 reserved[INLINE_RESERVED_SIZE]; 518 struct f2fs_dir_entry dentry[NR_INLINE_DENTRY]; 519 __u8 filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN]; 520 } __packed; 521 522 /* file types used in inode_info->flags */ 523 enum { 524 F2FS_FT_UNKNOWN, 525 F2FS_FT_REG_FILE, 526 F2FS_FT_DIR, 527 F2FS_FT_CHRDEV, 528 F2FS_FT_BLKDEV, 529 F2FS_FT_FIFO, 530 F2FS_FT_SOCK, 531 F2FS_FT_SYMLINK, 532 F2FS_FT_MAX 533 }; 534 535 #define S_SHIFT 12 536 537 #endif /* _LINUX_F2FS_FS_H */ 538