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