1 // SPDX-License-Identifier: GPL-2.0
3 * include/linux/f2fs_fs.h
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
8 #ifndef _LINUX_F2FS_FS_H
9 #define _LINUX_F2FS_FS_H
11 #include <linux/pagemap.h>
12 #include <linux/types.h>
14 #define F2FS_SUPER_OFFSET 1024 /* byte-size offset */
15 #define F2FS_MIN_LOG_SECTOR_SIZE 9 /* 9 bits for 512 bytes */
16 #define F2FS_MAX_LOG_SECTOR_SIZE 12 /* 12 bits for 4096 bytes */
17 #define F2FS_LOG_SECTORS_PER_BLOCK 3 /* log number for sector/blk */
18 #define F2FS_BLKSIZE 4096 /* support only 4KB block */
19 #define F2FS_BLKSIZE_BITS 12 /* bits for F2FS_BLKSIZE */
20 #define F2FS_MAX_EXTENSION 64 /* # of extension entries */
21 #define F2FS_EXTENSION_LEN 8 /* max size of extension */
22 #define F2FS_BLK_ALIGN(x) (((x) + F2FS_BLKSIZE - 1) >> F2FS_BLKSIZE_BITS)
24 #define NULL_ADDR ((block_t)0) /* used as block_t addresses */
25 #define NEW_ADDR ((block_t)-1) /* used as block_t addresses */
26 #define COMPRESS_ADDR ((block_t)-2) /* used as compressed data flag */
28 #define F2FS_BYTES_TO_BLK(bytes) ((bytes) >> F2FS_BLKSIZE_BITS)
29 #define F2FS_BLK_TO_BYTES(blk) ((blk) << F2FS_BLKSIZE_BITS)
31 /* 0, 1(node nid), 2(meta nid) are reserved node id */
32 #define F2FS_RESERVED_NODE_NUM 3
34 #define F2FS_ROOT_INO(sbi) ((sbi)->root_ino_num)
35 #define F2FS_NODE_INO(sbi) ((sbi)->node_ino_num)
36 #define F2FS_META_INO(sbi) ((sbi)->meta_ino_num)
37 #define F2FS_COMPRESS_INO(sbi) (NM_I(sbi)->max_nid)
39 #define F2FS_MAX_QUOTAS 3
41 #define F2FS_ENC_UTF8_12_1 1
43 #define F2FS_IO_SIZE(sbi) BIT(F2FS_OPTION(sbi).write_io_size_bits) /* Blocks */
44 #define F2FS_IO_SIZE_KB(sbi) BIT(F2FS_OPTION(sbi).write_io_size_bits + 2) /* KB */
45 #define F2FS_IO_SIZE_BITS(sbi) (F2FS_OPTION(sbi).write_io_size_bits) /* power of 2 */
46 #define F2FS_IO_SIZE_MASK(sbi) (F2FS_IO_SIZE(sbi) - 1)
47 #define F2FS_IO_ALIGNED(sbi) (F2FS_IO_SIZE(sbi) > 1)
49 /* This flag is used by node and meta inodes, and by recovery */
50 #define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO)
53 * For further optimization on multi-head logs, on-disk layout supports maximum
54 * 16 logs by default. The number, 16, is expected to cover all the cases
55 * enoughly. The implementaion currently uses no more than 6 logs.
56 * Half the logs are used for nodes, and the other half are used for data.
58 #define MAX_ACTIVE_LOGS 16
59 #define MAX_ACTIVE_NODE_LOGS 8
60 #define MAX_ACTIVE_DATA_LOGS 8
62 #define VERSION_LEN 256
63 #define MAX_VOLUME_NAME 512
64 #define MAX_PATH_LEN 64
71 __u8 path[MAX_PATH_LEN];
72 __le32 total_segments;
75 /* reason of stop_checkpoint */
77 STOP_CP_REASON_SHUTDOWN,
78 STOP_CP_REASON_FAULT_INJECT,
79 STOP_CP_REASON_META_PAGE,
80 STOP_CP_REASON_WRITE_FAIL,
81 STOP_CP_REASON_CORRUPTED_SUMMARY,
82 STOP_CP_REASON_UPDATE_INODE,
83 STOP_CP_REASON_FLUSH_FAIL,
87 #define MAX_STOP_REASON 32
89 /* detail reason for EFSCORRUPTED */
91 ERROR_CORRUPTED_CLUSTER,
92 ERROR_FAIL_DECOMPRESSION,
93 ERROR_INVALID_BLKADDR,
94 ERROR_CORRUPTED_DIRENT,
95 ERROR_CORRUPTED_INODE,
96 ERROR_INCONSISTENT_SUMMARY,
97 ERROR_INCONSISTENT_FOOTER,
98 ERROR_INCONSISTENT_SUM_TYPE,
99 ERROR_CORRUPTED_JOURNAL,
100 ERROR_INCONSISTENT_NODE_COUNT,
101 ERROR_INCONSISTENT_BLOCK_COUNT,
102 ERROR_INVALID_CURSEG,
103 ERROR_INCONSISTENT_SIT,
104 ERROR_CORRUPTED_VERITY_XATTR,
105 ERROR_CORRUPTED_XATTR,
109 #define MAX_F2FS_ERRORS 16
111 struct f2fs_super_block {
112 __le32 magic; /* Magic Number */
113 __le16 major_ver; /* Major Version */
114 __le16 minor_ver; /* Minor Version */
115 __le32 log_sectorsize; /* log2 sector size in bytes */
116 __le32 log_sectors_per_block; /* log2 # of sectors per block */
117 __le32 log_blocksize; /* log2 block size in bytes */
118 __le32 log_blocks_per_seg; /* log2 # of blocks per segment */
119 __le32 segs_per_sec; /* # of segments per section */
120 __le32 secs_per_zone; /* # of sections per zone */
121 __le32 checksum_offset; /* checksum offset inside super block */
122 __le64 block_count; /* total # of user blocks */
123 __le32 section_count; /* total # of sections */
124 __le32 segment_count; /* total # of segments */
125 __le32 segment_count_ckpt; /* # of segments for checkpoint */
126 __le32 segment_count_sit; /* # of segments for SIT */
127 __le32 segment_count_nat; /* # of segments for NAT */
128 __le32 segment_count_ssa; /* # of segments for SSA */
129 __le32 segment_count_main; /* # of segments for main area */
130 __le32 segment0_blkaddr; /* start block address of segment 0 */
131 __le32 cp_blkaddr; /* start block address of checkpoint */
132 __le32 sit_blkaddr; /* start block address of SIT */
133 __le32 nat_blkaddr; /* start block address of NAT */
134 __le32 ssa_blkaddr; /* start block address of SSA */
135 __le32 main_blkaddr; /* start block address of main area */
136 __le32 root_ino; /* root inode number */
137 __le32 node_ino; /* node inode number */
138 __le32 meta_ino; /* meta inode number */
139 __u8 uuid[16]; /* 128-bit uuid for volume */
140 __le16 volume_name[MAX_VOLUME_NAME]; /* volume name */
141 __le32 extension_count; /* # of extensions below */
142 __u8 extension_list[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];/* extension array */
144 __u8 version[VERSION_LEN]; /* the kernel version */
145 __u8 init_version[VERSION_LEN]; /* the initial kernel version */
146 __le32 feature; /* defined features */
147 __u8 encryption_level; /* versioning level for encryption */
148 __u8 encrypt_pw_salt[16]; /* Salt used for string2key algorithm */
149 struct f2fs_device devs[MAX_DEVICES]; /* device list */
150 __le32 qf_ino[F2FS_MAX_QUOTAS]; /* quota inode numbers */
151 __u8 hot_ext_count; /* # of hot file extension */
152 __le16 s_encoding; /* Filename charset encoding */
153 __le16 s_encoding_flags; /* Filename charset encoding flags */
154 __u8 s_stop_reason[MAX_STOP_REASON]; /* stop checkpoint reason */
155 __u8 s_errors[MAX_F2FS_ERRORS]; /* reason of image corrupts */
156 __u8 reserved[258]; /* valid reserved region */
157 __le32 crc; /* checksum of superblock */
163 #define CP_RESIZEFS_FLAG 0x00004000
164 #define CP_DISABLED_QUICK_FLAG 0x00002000
165 #define CP_DISABLED_FLAG 0x00001000
166 #define CP_QUOTA_NEED_FSCK_FLAG 0x00000800
167 #define CP_LARGE_NAT_BITMAP_FLAG 0x00000400
168 #define CP_NOCRC_RECOVERY_FLAG 0x00000200
169 #define CP_TRIMMED_FLAG 0x00000100
170 #define CP_NAT_BITS_FLAG 0x00000080
171 #define CP_CRC_RECOVERY_FLAG 0x00000040
172 #define CP_FASTBOOT_FLAG 0x00000020
173 #define CP_FSCK_FLAG 0x00000010
174 #define CP_ERROR_FLAG 0x00000008
175 #define CP_COMPACT_SUM_FLAG 0x00000004
176 #define CP_ORPHAN_PRESENT_FLAG 0x00000002
177 #define CP_UMOUNT_FLAG 0x00000001
179 #define F2FS_CP_PACKS 2 /* # of checkpoint packs */
181 struct f2fs_checkpoint {
182 __le64 checkpoint_ver; /* checkpoint block version number */
183 __le64 user_block_count; /* # of user blocks */
184 __le64 valid_block_count; /* # of valid blocks in main area */
185 __le32 rsvd_segment_count; /* # of reserved segments for gc */
186 __le32 overprov_segment_count; /* # of overprovision segments */
187 __le32 free_segment_count; /* # of free segments in main area */
189 /* information of current node segments */
190 __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS];
191 __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS];
192 /* information of current data segments */
193 __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS];
194 __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS];
195 __le32 ckpt_flags; /* Flags : umount and journal_present */
196 __le32 cp_pack_total_block_count; /* total # of one cp pack */
197 __le32 cp_pack_start_sum; /* start block number of data summary */
198 __le32 valid_node_count; /* Total number of valid nodes */
199 __le32 valid_inode_count; /* Total number of valid inodes */
200 __le32 next_free_nid; /* Next free node number */
201 __le32 sit_ver_bitmap_bytesize; /* Default value 64 */
202 __le32 nat_ver_bitmap_bytesize; /* Default value 256 */
203 __le32 checksum_offset; /* checksum offset inside cp block */
204 __le64 elapsed_time; /* mounted time */
205 /* allocation type of current segment */
206 unsigned char alloc_type[MAX_ACTIVE_LOGS];
208 /* SIT and NAT version bitmap */
209 unsigned char sit_nat_version_bitmap[];
212 #define CP_CHKSUM_OFFSET 4092 /* default chksum offset in checkpoint */
213 #define CP_MIN_CHKSUM_OFFSET \
214 (offsetof(struct f2fs_checkpoint, sit_nat_version_bitmap))
217 * For orphan inode management
219 #define F2FS_ORPHANS_PER_BLOCK 1020
221 #define GET_ORPHAN_BLOCKS(n) (((n) + F2FS_ORPHANS_PER_BLOCK - 1) / \
222 F2FS_ORPHANS_PER_BLOCK)
224 struct f2fs_orphan_block {
225 __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */
226 __le32 reserved; /* reserved */
227 __le16 blk_addr; /* block index in current CP */
228 __le16 blk_count; /* Number of orphan inode blocks in CP */
229 __le32 entry_count; /* Total number of orphan nodes in current CP */
230 __le32 check_sum; /* CRC32 for orphan inode block */
237 __le32 fofs; /* start file offset of the extent */
238 __le32 blk; /* start block address of the extent */
239 __le32 len; /* length of the extent */
242 #define F2FS_NAME_LEN 255
243 /* 200 bytes for inline xattrs by default */
244 #define DEFAULT_INLINE_XATTR_ADDRS 50
245 #define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */
246 #define CUR_ADDRS_PER_INODE(inode) (DEF_ADDRS_PER_INODE - \
247 get_extra_isize(inode))
248 #define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */
249 #define ADDRS_PER_INODE(inode) addrs_per_inode(inode)
250 #define DEF_ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */
251 #define ADDRS_PER_BLOCK(inode) addrs_per_block(inode)
252 #define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */
254 #define ADDRS_PER_PAGE(page, inode) \
255 (IS_INODE(page) ? ADDRS_PER_INODE(inode) : ADDRS_PER_BLOCK(inode))
257 #define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1)
258 #define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2)
259 #define NODE_IND1_BLOCK (DEF_ADDRS_PER_INODE + 3)
260 #define NODE_IND2_BLOCK (DEF_ADDRS_PER_INODE + 4)
261 #define NODE_DIND_BLOCK (DEF_ADDRS_PER_INODE + 5)
263 #define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */
264 #define F2FS_INLINE_DATA 0x02 /* file inline data flag */
265 #define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */
266 #define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */
267 #define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */
268 #define F2FS_EXTRA_ATTR 0x20 /* file having extra attribute */
269 #define F2FS_PIN_FILE 0x40 /* file should not be gced */
270 #define F2FS_COMPRESS_RELEASED 0x80 /* file released compressed blocks */
273 __le16 i_mode; /* file mode */
274 __u8 i_advise; /* file hints */
275 __u8 i_inline; /* file inline flags */
276 __le32 i_uid; /* user ID */
277 __le32 i_gid; /* group ID */
278 __le32 i_links; /* links count */
279 __le64 i_size; /* file size in bytes */
280 __le64 i_blocks; /* file size in blocks */
281 __le64 i_atime; /* access time */
282 __le64 i_ctime; /* change time */
283 __le64 i_mtime; /* modification time */
284 __le32 i_atime_nsec; /* access time in nano scale */
285 __le32 i_ctime_nsec; /* change time in nano scale */
286 __le32 i_mtime_nsec; /* modification time in nano scale */
287 __le32 i_generation; /* file version (for NFS) */
289 __le32 i_current_depth; /* only for directory depth */
290 __le16 i_gc_failures; /*
291 * # of gc failures on pinned file.
292 * only for regular files.
295 __le32 i_xattr_nid; /* nid to save xattr */
296 __le32 i_flags; /* file attributes */
297 __le32 i_pino; /* parent inode number */
298 __le32 i_namelen; /* file name length */
299 __u8 i_name[F2FS_NAME_LEN]; /* file name for SPOR */
300 __u8 i_dir_level; /* dentry_level for large dir */
302 struct f2fs_extent i_ext; /* caching a largest extent */
306 __le16 i_extra_isize; /* extra inode attribute size */
307 __le16 i_inline_xattr_size; /* inline xattr size, unit: 4 bytes */
308 __le32 i_projid; /* project id */
309 __le32 i_inode_checksum;/* inode meta checksum */
310 __le64 i_crtime; /* creation time */
311 __le32 i_crtime_nsec; /* creation time in nano scale */
312 __le64 i_compr_blocks; /* # of compressed blocks */
313 __u8 i_compress_algorithm; /* compress algorithm */
314 __u8 i_log_cluster_size; /* log of cluster size */
315 __le16 i_compress_flag; /* compress flag */
316 /* 0 bit: chksum flag
317 * [8,15] bits: compress level
319 __le32 i_extra_end[0]; /* for attribute size calculation */
321 __le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */
323 __le32 i_nid[DEF_NIDS_PER_INODE]; /* direct(2), indirect(2),
324 double_indirect(1) node id */
328 __le32 addr[DEF_ADDRS_PER_BLOCK]; /* array of data block address */
331 struct indirect_node {
332 __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */
342 #define OFFSET_BIT_MASK GENMASK(OFFSET_BIT_SHIFT - 1, 0)
345 __le32 nid; /* node id */
346 __le32 ino; /* inode number */
347 __le32 flag; /* include cold/fsync/dentry marks and offset */
348 __le64 cp_ver; /* checkpoint version */
349 __le32 next_blkaddr; /* next node page block address */
353 /* can be one of three types: inode, direct, and indirect types */
356 struct direct_node dn;
357 struct indirect_node in;
359 struct node_footer footer;
365 #define NAT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_nat_entry))
367 struct f2fs_nat_entry {
368 __u8 version; /* latest version of cached nat entry */
369 __le32 ino; /* inode number */
370 __le32 block_addr; /* block address */
373 struct f2fs_nat_block {
374 struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK];
380 * Each segment is 2MB in size by default so that a bitmap for validity of
381 * there-in blocks should occupy 64 bytes, 512 bits.
382 * Not allow to change this.
384 #define SIT_VBLOCK_MAP_SIZE 64
385 #define SIT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_sit_entry))
388 * F2FS uses 4 bytes to represent block address. As a result, supported size of
389 * disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments.
391 #define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2)
394 * Note that f2fs_sit_entry->vblocks has the following bit-field information.
395 * [15:10] : allocation type such as CURSEG_XXXX_TYPE
396 * [9:0] : valid block count
398 #define SIT_VBLOCKS_SHIFT 10
399 #define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1)
400 #define GET_SIT_VBLOCKS(raw_sit) \
401 (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK)
402 #define GET_SIT_TYPE(raw_sit) \
403 ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \
404 >> SIT_VBLOCKS_SHIFT)
406 struct f2fs_sit_entry {
407 __le16 vblocks; /* reference above */
408 __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */
409 __le64 mtime; /* segment age for cleaning */
412 struct f2fs_sit_block {
413 struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK];
417 * For segment summary
419 * One summary block contains exactly 512 summary entries, which represents
420 * exactly 2MB segment by default. Not allow to change the basic units.
422 * NOTE: For initializing fields, you must use set_summary
424 * - If data page, nid represents dnode's nid
425 * - If node page, nid represents the node page's nid.
427 * The ofs_in_node is used by only data page. It represents offset
428 * from node's page's beginning to get a data block address.
429 * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node)
431 #define ENTRIES_IN_SUM 512
432 #define SUMMARY_SIZE (7) /* sizeof(struct summary) */
433 #define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */
434 #define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM)
436 /* a summary entry for a 4KB-sized block in a segment */
437 struct f2fs_summary {
438 __le32 nid; /* parent node id */
442 __u8 version; /* node version number */
443 __le16 ofs_in_node; /* block index in parent node */
448 /* summary block type, node or data, is stored to the summary_footer */
449 #define SUM_TYPE_NODE (1)
450 #define SUM_TYPE_DATA (0)
452 struct summary_footer {
453 unsigned char entry_type; /* SUM_TYPE_XXX */
454 __le32 check_sum; /* summary checksum */
457 #define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\
459 #define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\
460 sizeof(struct nat_journal_entry))
461 #define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\
462 sizeof(struct nat_journal_entry))
463 #define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\
464 sizeof(struct sit_journal_entry))
465 #define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\
466 sizeof(struct sit_journal_entry))
468 /* Reserved area should make size of f2fs_extra_info equals to
469 * that of nat_journal and sit_journal.
471 #define EXTRA_INFO_RESERVED (SUM_JOURNAL_SIZE - 2 - 8)
474 * frequently updated NAT/SIT entries can be stored in the spare area in
482 struct nat_journal_entry {
484 struct f2fs_nat_entry ne;
488 struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES];
489 __u8 reserved[NAT_JOURNAL_RESERVED];
492 struct sit_journal_entry {
494 struct f2fs_sit_entry se;
498 struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES];
499 __u8 reserved[SIT_JOURNAL_RESERVED];
502 struct f2fs_extra_info {
503 __le64 kbytes_written;
504 __u8 reserved[EXTRA_INFO_RESERVED];
507 struct f2fs_journal {
512 /* spare area is used by NAT or SIT journals or extra info */
514 struct nat_journal nat_j;
515 struct sit_journal sit_j;
516 struct f2fs_extra_info info;
520 /* 4KB-sized summary block structure */
521 struct f2fs_summary_block {
522 struct f2fs_summary entries[ENTRIES_IN_SUM];
523 struct f2fs_journal journal;
524 struct summary_footer footer;
528 * For directory operations
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)
535 typedef __le32 f2fs_hash_t;
537 /* One directory entry slot covers 8bytes-long file name */
538 #define F2FS_SLOT_LEN 8
539 #define F2FS_SLOT_LEN_BITS 3
541 #define GET_DENTRY_SLOTS(x) (((x) + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS)
543 /* MAX level for dir lookup */
544 #define MAX_DIR_HASH_DEPTH 63
546 /* MAX buckets in one level of dir */
547 #define MAX_DIR_BUCKETS BIT((MAX_DIR_HASH_DEPTH / 2) - 1)
550 * space utilization of regular dentry and inline dentry (w/o extra reservation)
551 * regular dentry inline dentry (def) inline dentry (min)
552 * bitmap 1 * 27 = 27 1 * 23 = 23 1 * 1 = 1
553 * reserved 1 * 3 = 3 1 * 7 = 7 1 * 1 = 1
554 * dentry 11 * 214 = 2354 11 * 182 = 2002 11 * 2 = 22
555 * filename 8 * 214 = 1712 8 * 182 = 1456 8 * 2 = 16
558 * Note: there are more reserved space in inline dentry than in regular
559 * dentry, when converting inline dentry we should handle this carefully.
561 #define NR_DENTRY_IN_BLOCK 214 /* the number of dentry in a block */
562 #define SIZE_OF_DIR_ENTRY 11 /* by byte */
563 #define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \
565 #define SIZE_OF_RESERVED (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \
567 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP))
568 #define MIN_INLINE_DENTRY_SIZE 40 /* just include '.' and '..' entries */
570 /* One directory entry slot representing F2FS_SLOT_LEN-sized file name */
571 struct f2fs_dir_entry {
572 __le32 hash_code; /* hash code of file name */
573 __le32 ino; /* inode number */
574 __le16 name_len; /* length of file name */
575 __u8 file_type; /* file type */
578 /* 4KB-sized directory entry block */
579 struct f2fs_dentry_block {
580 /* validity bitmap for directory entries in each block */
581 __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP];
582 __u8 reserved[SIZE_OF_RESERVED];
583 struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK];
584 __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN];
587 #define F2FS_DEF_PROJID 0 /* default project ID */
589 #endif /* _LINUX_F2FS_FS_H */