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TOMOYO Linux Cross Reference
Linux/include/linux/f2fs_fs.h

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  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  * F2FS uses 4 bytes to represent block address. As a result, supported size of
298  * disk is 16 TB and it equals to 16 * 1024 * 1024 / 2 segments.
299  */
300 #define F2FS_MAX_SEGMENT       ((16 * 1024 * 1024) / 2)
301 
302 /*
303  * Note that f2fs_sit_entry->vblocks has the following bit-field information.
304  * [15:10] : allocation type such as CURSEG_XXXX_TYPE
305  * [9:0] : valid block count
306  */
307 #define SIT_VBLOCKS_SHIFT       10
308 #define SIT_VBLOCKS_MASK        ((1 << SIT_VBLOCKS_SHIFT) - 1)
309 #define GET_SIT_VBLOCKS(raw_sit)                                \
310         (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK)
311 #define GET_SIT_TYPE(raw_sit)                                   \
312         ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK)  \
313          >> SIT_VBLOCKS_SHIFT)
314 
315 struct f2fs_sit_entry {
316         __le16 vblocks;                         /* reference above */
317         __u8 valid_map[SIT_VBLOCK_MAP_SIZE];    /* bitmap for valid blocks */
318         __le64 mtime;                           /* segment age for cleaning */
319 } __packed;
320 
321 struct f2fs_sit_block {
322         struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK];
323 } __packed;
324 
325 /*
326  * For segment summary
327  *
328  * One summary block contains exactly 512 summary entries, which represents
329  * exactly 2MB segment by default. Not allow to change the basic units.
330  *
331  * NOTE: For initializing fields, you must use set_summary
332  *
333  * - If data page, nid represents dnode's nid
334  * - If node page, nid represents the node page's nid.
335  *
336  * The ofs_in_node is used by only data page. It represents offset
337  * from node's page's beginning to get a data block address.
338  * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node)
339  */
340 #define ENTRIES_IN_SUM          512
341 #define SUMMARY_SIZE            (7)     /* sizeof(struct summary) */
342 #define SUM_FOOTER_SIZE         (5)     /* sizeof(struct summary_footer) */
343 #define SUM_ENTRY_SIZE          (SUMMARY_SIZE * ENTRIES_IN_SUM)
344 
345 /* a summary entry for a 4KB-sized block in a segment */
346 struct f2fs_summary {
347         __le32 nid;             /* parent node id */
348         union {
349                 __u8 reserved[3];
350                 struct {
351                         __u8 version;           /* node version number */
352                         __le16 ofs_in_node;     /* block index in parent node */
353                 } __packed;
354         };
355 } __packed;
356 
357 /* summary block type, node or data, is stored to the summary_footer */
358 #define SUM_TYPE_NODE           (1)
359 #define SUM_TYPE_DATA           (0)
360 
361 struct summary_footer {
362         unsigned char entry_type;       /* SUM_TYPE_XXX */
363         __le32 check_sum;               /* summary checksum */
364 } __packed;
365 
366 #define SUM_JOURNAL_SIZE        (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\
367                                 SUM_ENTRY_SIZE)
368 #define NAT_JOURNAL_ENTRIES     ((SUM_JOURNAL_SIZE - 2) /\
369                                 sizeof(struct nat_journal_entry))
370 #define NAT_JOURNAL_RESERVED    ((SUM_JOURNAL_SIZE - 2) %\
371                                 sizeof(struct nat_journal_entry))
372 #define SIT_JOURNAL_ENTRIES     ((SUM_JOURNAL_SIZE - 2) /\
373                                 sizeof(struct sit_journal_entry))
374 #define SIT_JOURNAL_RESERVED    ((SUM_JOURNAL_SIZE - 2) %\
375                                 sizeof(struct sit_journal_entry))
376 
377 /* Reserved area should make size of f2fs_extra_info equals to
378  * that of nat_journal and sit_journal.
379  */
380 #define EXTRA_INFO_RESERVED     (SUM_JOURNAL_SIZE - 2 - 8)
381 
382 /*
383  * frequently updated NAT/SIT entries can be stored in the spare area in
384  * summary blocks
385  */
386 enum {
387         NAT_JOURNAL = 0,
388         SIT_JOURNAL
389 };
390 
391 struct nat_journal_entry {
392         __le32 nid;
393         struct f2fs_nat_entry ne;
394 } __packed;
395 
396 struct nat_journal {
397         struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES];
398         __u8 reserved[NAT_JOURNAL_RESERVED];
399 } __packed;
400 
401 struct sit_journal_entry {
402         __le32 segno;
403         struct f2fs_sit_entry se;
404 } __packed;
405 
406 struct sit_journal {
407         struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES];
408         __u8 reserved[SIT_JOURNAL_RESERVED];
409 } __packed;
410 
411 struct f2fs_extra_info {
412         __le64 kbytes_written;
413         __u8 reserved[EXTRA_INFO_RESERVED];
414 } __packed;
415 
416 struct f2fs_journal {
417         union {
418                 __le16 n_nats;
419                 __le16 n_sits;
420         };
421         /* spare area is used by NAT or SIT journals or extra info */
422         union {
423                 struct nat_journal nat_j;
424                 struct sit_journal sit_j;
425                 struct f2fs_extra_info info;
426         };
427 } __packed;
428 
429 /* 4KB-sized summary block structure */
430 struct f2fs_summary_block {
431         struct f2fs_summary entries[ENTRIES_IN_SUM];
432         struct f2fs_journal journal;
433         struct summary_footer footer;
434 } __packed;
435 
436 /*
437  * For directory operations
438  */
439 #define F2FS_DOT_HASH           0
440 #define F2FS_DDOT_HASH          F2FS_DOT_HASH
441 #define F2FS_MAX_HASH           (~((0x3ULL) << 62))
442 #define F2FS_HASH_COL_BIT       ((0x1ULL) << 63)
443 
444 typedef __le32  f2fs_hash_t;
445 
446 /* One directory entry slot covers 8bytes-long file name */
447 #define F2FS_SLOT_LEN           8
448 #define F2FS_SLOT_LEN_BITS      3
449 
450 #define GET_DENTRY_SLOTS(x)     ((x + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS)
451 
452 /* MAX level for dir lookup */
453 #define MAX_DIR_HASH_DEPTH      63
454 
455 /* MAX buckets in one level of dir */
456 #define MAX_DIR_BUCKETS         (1 << ((MAX_DIR_HASH_DEPTH / 2) - 1))
457 
458 /*
459  * space utilization of regular dentry and inline dentry
460  *              regular dentry                  inline dentry
461  * bitmap       1 * 27 = 27                     1 * 23 = 23
462  * reserved     1 * 3 = 3                       1 * 7 = 7
463  * dentry       11 * 214 = 2354                 11 * 182 = 2002
464  * filename     8 * 214 = 1712                  8 * 182 = 1456
465  * total        4096                            3488
466  *
467  * Note: there are more reserved space in inline dentry than in regular
468  * dentry, when converting inline dentry we should handle this carefully.
469  */
470 #define NR_DENTRY_IN_BLOCK      214     /* the number of dentry in a block */
471 #define SIZE_OF_DIR_ENTRY       11      /* by byte */
472 #define SIZE_OF_DENTRY_BITMAP   ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \
473                                         BITS_PER_BYTE)
474 #define SIZE_OF_RESERVED        (PAGE_SIZE - ((SIZE_OF_DIR_ENTRY + \
475                                 F2FS_SLOT_LEN) * \
476                                 NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP))
477 
478 /* One directory entry slot representing F2FS_SLOT_LEN-sized file name */
479 struct f2fs_dir_entry {
480         __le32 hash_code;       /* hash code of file name */
481         __le32 ino;             /* inode number */
482         __le16 name_len;        /* lengh of file name */
483         __u8 file_type;         /* file type */
484 } __packed;
485 
486 /* 4KB-sized directory entry block */
487 struct f2fs_dentry_block {
488         /* validity bitmap for directory entries in each block */
489         __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP];
490         __u8 reserved[SIZE_OF_RESERVED];
491         struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK];
492         __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN];
493 } __packed;
494 
495 /* for inline dir */
496 #define NR_INLINE_DENTRY        (MAX_INLINE_DATA * BITS_PER_BYTE / \
497                                 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
498                                 BITS_PER_BYTE + 1))
499 #define INLINE_DENTRY_BITMAP_SIZE       ((NR_INLINE_DENTRY + \
500                                         BITS_PER_BYTE - 1) / BITS_PER_BYTE)
501 #define INLINE_RESERVED_SIZE    (MAX_INLINE_DATA - \
502                                 ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
503                                 NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE))
504 
505 /* inline directory entry structure */
506 struct f2fs_inline_dentry {
507         __u8 dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE];
508         __u8 reserved[INLINE_RESERVED_SIZE];
509         struct f2fs_dir_entry dentry[NR_INLINE_DENTRY];
510         __u8 filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN];
511 } __packed;
512 
513 /* file types used in inode_info->flags */
514 enum {
515         F2FS_FT_UNKNOWN,
516         F2FS_FT_REG_FILE,
517         F2FS_FT_DIR,
518         F2FS_FT_CHRDEV,
519         F2FS_FT_BLKDEV,
520         F2FS_FT_FIFO,
521         F2FS_FT_SOCK,
522         F2FS_FT_SYMLINK,
523         F2FS_FT_MAX
524 };
525 
526 #define S_SHIFT 12
527 
528 #endif  /* _LINUX_F2FS_FS_H */
529 

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