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#include <linux/pagemap.h>#include <linux/types.h>
#define F2FS_SUPER_OFFSET 1024 /* byte-size offset */#define F2FS_MIN_LOG_SECTOR_SIZE 9 /* 9 bits for 512 bytes */#define F2FS_MAX_LOG_SECTOR_SIZE PAGE_SHIFT /* Max is Block Size */#define F2FS_LOG_SECTORS_PER_BLOCK (PAGE_SHIFT - 9) /* log number for sector/blk */#define F2FS_BLKSIZE PAGE_SIZE /* support only block == page */#define F2FS_BLKSIZE_BITS PAGE_SHIFT /* bits for F2FS_BLKSIZE */#define F2FS_MAX_EXTENSION 64 /* # of extension entries */#define F2FS_EXTENSION_LEN 8 /* max size of extension */
#define NULL_ADDR ((block_t)0) /* used as block_t addresses */#define NEW_ADDR ((block_t)-1) /* used as block_t addresses */#define COMPRESS_ADDR ((block_t)-2) /* used as compressed data flag */
#define F2FS_BLKSIZE_MASK (F2FS_BLKSIZE - 1)#define F2FS_BYTES_TO_BLK(bytes) ((unsigned long long)(bytes) >> F2FS_BLKSIZE_BITS)#define F2FS_BLK_TO_BYTES(blk) ((unsigned long long)(blk) << F2FS_BLKSIZE_BITS)#define F2FS_BLK_END_BYTES(blk) (F2FS_BLK_TO_BYTES(blk + 1) - 1)#define F2FS_BLK_ALIGN(x) (F2FS_BYTES_TO_BLK((x) + F2FS_BLKSIZE - 1))
/* 0, 1(node nid), 2(meta nid) are reserved node id */#define F2FS_RESERVED_NODE_NUM 3
#define F2FS_ROOT_INO(sbi) ((sbi)->root_ino_num)#define F2FS_NODE_INO(sbi) ((sbi)->node_ino_num)#define F2FS_META_INO(sbi) ((sbi)->meta_ino_num)#define F2FS_COMPRESS_INO(sbi) (NM_I(sbi)->max_nid)
#define F2FS_MAX_QUOTAS 3
#define F2FS_ENC_UTF8_12_1 1
/* This flag is used by node and meta inodes, and by recovery */#define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO)
/* * For further optimization on multi-head logs, on-disk layout supports maximum * 16 logs by default. The number, 16, is expected to cover all the cases * enoughly. The implementaion currently uses no more than 6 logs. * Half the logs are used for nodes, and the other half are used for data. */#define MAX_ACTIVE_LOGS 16#define MAX_ACTIVE_NODE_LOGS 8#define MAX_ACTIVE_DATA_LOGS 8
#define VERSION_LEN 256#define MAX_VOLUME_NAME 512#define MAX_PATH_LEN 64#define MAX_DEVICES 8
/* * For superblock */struct f2fs_device { __u8 path[MAX_PATH_LEN]; __le32 total_segments;} __packed;
/* reason of stop_checkpoint */enum stop_cp_reason { STOP_CP_REASON_SHUTDOWN, STOP_CP_REASON_FAULT_INJECT, STOP_CP_REASON_META_PAGE, STOP_CP_REASON_WRITE_FAIL, STOP_CP_REASON_CORRUPTED_SUMMARY, STOP_CP_REASON_UPDATE_INODE, STOP_CP_REASON_FLUSH_FAIL, STOP_CP_REASON_NO_SEGMENT, STOP_CP_REASON_CORRUPTED_FREE_BITMAP, STOP_CP_REASON_CORRUPTED_NID, STOP_CP_REASON_READ_META, STOP_CP_REASON_READ_NODE, STOP_CP_REASON_READ_DATA, STOP_CP_REASON_MAX,};
#define MAX_STOP_REASON 32
/* detail reason for EFSCORRUPTED */enum f2fs_error { ERROR_CORRUPTED_CLUSTER, ERROR_FAIL_DECOMPRESSION, ERROR_INVALID_BLKADDR, ERROR_CORRUPTED_DIRENT, ERROR_CORRUPTED_INODE, ERROR_INCONSISTENT_SUMMARY, ERROR_INCONSISTENT_FOOTER, ERROR_INCONSISTENT_SUM_TYPE, ERROR_CORRUPTED_JOURNAL, ERROR_INCONSISTENT_NODE_COUNT, ERROR_INCONSISTENT_BLOCK_COUNT, ERROR_INVALID_CURSEG, ERROR_INCONSISTENT_SIT, ERROR_CORRUPTED_VERITY_XATTR, ERROR_CORRUPTED_XATTR, ERROR_INVALID_NODE_REFERENCE, ERROR_INCONSISTENT_NAT, ERROR_INCONSISTENT_ORPHAN, ERROR_MAX,};
#define MAX_F2FS_ERRORS 16
struct f2fs_super_block { __le32 magic; /* Magic Number */ __le16 major_ver; /* Major Version */ __le16 minor_ver; /* Minor Version */ __le32 log_sectorsize; /* log2 sector size in bytes */ __le32 log_sectors_per_block; /* log2 # of sectors per block */ __le32 log_blocksize; /* log2 block size in bytes */ __le32 log_blocks_per_seg; /* log2 # of blocks per segment */ __le32 segs_per_sec; /* # of segments per section */ __le32 secs_per_zone; /* # of sections per zone */ __le32 checksum_offset; /* checksum offset inside super block */ __le64 block_count; /* total # of user blocks */ __le32 section_count; /* total # of sections */ __le32 segment_count; /* total # of segments */ __le32 segment_count_ckpt; /* # of segments for checkpoint */ __le32 segment_count_sit; /* # of segments for SIT */ __le32 segment_count_nat; /* # of segments for NAT */ __le32 segment_count_ssa; /* # of segments for SSA */ __le32 segment_count_main; /* # of segments for main area */ __le32 segment0_blkaddr; /* start block address of segment 0 */ __le32 cp_blkaddr; /* start block address of checkpoint */ __le32 sit_blkaddr; /* start block address of SIT */ __le32 nat_blkaddr; /* start block address of NAT */ __le32 ssa_blkaddr; /* start block address of SSA */ __le32 main_blkaddr; /* start block address of main area */ __le32 root_ino; /* root inode number */ __le32 node_ino; /* node inode number */ __le32 meta_ino; /* meta inode number */ __u8 uuid[16]; /* 128-bit uuid for volume */ __le16 volume_name[MAX_VOLUME_NAME]; /* volume name */ __le32 extension_count; /* # of extensions below */ __u8 extension_list[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];/* extension array */ __le32 cp_payload; __u8 version[VERSION_LEN]; /* the kernel version */ __u8 init_version[VERSION_LEN]; /* the initial kernel version */ __le32 feature; /* defined features */ __u8 encryption_level; /* versioning level for encryption */ __u8 encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ struct f2fs_device devs[MAX_DEVICES]; /* device list */ __le32 qf_ino[F2FS_MAX_QUOTAS]; /* quota inode numbers */ __u8 hot_ext_count; /* # of hot file extension */ __le16 s_encoding; /* Filename charset encoding */ __le16 s_encoding_flags; /* Filename charset encoding flags */ __u8 s_stop_reason[MAX_STOP_REASON]; /* stop checkpoint reason */ __u8 s_errors[MAX_F2FS_ERRORS]; /* reason of image corrupts */ __u8 reserved[258]; /* valid reserved region */ __le32 crc; /* checksum of superblock */} __packed;
/* * For checkpoint */#define CP_RESIZEFS_FLAG 0x00004000#define CP_DISABLED_QUICK_FLAG 0x00002000#define CP_DISABLED_FLAG 0x00001000#define CP_QUOTA_NEED_FSCK_FLAG 0x00000800#define CP_LARGE_NAT_BITMAP_FLAG 0x00000400#define CP_NOCRC_RECOVERY_FLAG 0x00000200#define CP_TRIMMED_FLAG 0x00000100#define CP_NAT_BITS_FLAG 0x00000080#define CP_CRC_RECOVERY_FLAG 0x00000040#define CP_FASTBOOT_FLAG 0x00000020#define CP_FSCK_FLAG 0x00000010#define CP_ERROR_FLAG 0x00000008#define CP_COMPACT_SUM_FLAG 0x00000004#define CP_ORPHAN_PRESENT_FLAG 0x00000002#define CP_UMOUNT_FLAG 0x00000001
#define F2FS_CP_PACKS 2 /* # of checkpoint packs */
struct f2fs_checkpoint { __le64 checkpoint_ver; /* checkpoint block version number */ __le64 user_block_count; /* # of user blocks */ __le64 valid_block_count; /* # of valid blocks in main area */ __le32 rsvd_segment_count; /* # of reserved segments for gc */ __le32 overprov_segment_count; /* # of overprovision segments */ __le32 free_segment_count; /* # of free segments in main area */
/* information of current node segments */ __le32 cur_node_segno[MAX_ACTIVE_NODE_LOGS]; __le16 cur_node_blkoff[MAX_ACTIVE_NODE_LOGS]; /* information of current data segments */ __le32 cur_data_segno[MAX_ACTIVE_DATA_LOGS]; __le16 cur_data_blkoff[MAX_ACTIVE_DATA_LOGS]; __le32 ckpt_flags; /* Flags : umount and journal_present */ __le32 cp_pack_total_block_count; /* total # of one cp pack */ __le32 cp_pack_start_sum; /* start block number of data summary */ __le32 valid_node_count; /* Total number of valid nodes */ __le32 valid_inode_count; /* Total number of valid inodes */ __le32 next_free_nid; /* Next free node number */ __le32 sit_ver_bitmap_bytesize; /* Default value 64 */ __le32 nat_ver_bitmap_bytesize; /* Default value 256 */ __le32 checksum_offset; /* checksum offset inside cp block */ __le64 elapsed_time; /* mounted time */ /* allocation type of current segment */ unsigned char alloc_type[MAX_ACTIVE_LOGS];
/* SIT and NAT version bitmap */ unsigned char sit_nat_version_bitmap[];} __packed;
#define CP_CHKSUM_OFFSET (F2FS_BLKSIZE - sizeof(__le32)) /* default chksum offset in checkpoint */#define CP_MIN_CHKSUM_OFFSET \ (offsetof(struct f2fs_checkpoint, sit_nat_version_bitmap))
/* * For orphan inode management */#define F2FS_ORPHANS_PER_BLOCK ((F2FS_BLKSIZE - 4 * sizeof(__le32)) / sizeof(__le32))
#define GET_ORPHAN_BLOCKS(n) (((n) + F2FS_ORPHANS_PER_BLOCK - 1) / \ F2FS_ORPHANS_PER_BLOCK)
struct f2fs_orphan_block { __le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */ __le32 reserved; /* reserved */ __le16 blk_addr; /* block index in current CP */ __le16 blk_count; /* Number of orphan inode blocks in CP */ __le32 entry_count; /* Total number of orphan nodes in current CP */ __le32 check_sum; /* CRC32 for orphan inode block */} __packed;
/* * For NODE structure */struct f2fs_extent { __le32 fofs; /* start file offset of the extent */ __le32 blk; /* start block address of the extent */ __le32 len; /* length of the extent */} __packed;
#define F2FS_NAME_LEN 255/* 200 bytes for inline xattrs by default */#define DEFAULT_INLINE_XATTR_ADDRS 50
#define OFFSET_OF_END_OF_I_EXT 360#define SIZE_OF_I_NID 20
struct node_footer { __le32 nid; /* node id */ __le32 ino; /* inode number */ __le32 flag; /* include cold/fsync/dentry marks and offset */ __le64 cp_ver; /* checkpoint version */ __le32 next_blkaddr; /* next node page block address */} __packed;
/* Address Pointers in an Inode */#define DEF_ADDRS_PER_INODE ((F2FS_BLKSIZE - OFFSET_OF_END_OF_I_EXT \ - SIZE_OF_I_NID \ - sizeof(struct node_footer)) / sizeof(__le32))#define CUR_ADDRS_PER_INODE(inode) (DEF_ADDRS_PER_INODE - \ get_extra_isize(inode))#define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */#define ADDRS_PER_INODE(inode) addrs_per_page(inode, true)/* Address Pointers in a Direct Block */#define DEF_ADDRS_PER_BLOCK ((F2FS_BLKSIZE - sizeof(struct node_footer)) / sizeof(__le32))#define ADDRS_PER_BLOCK(inode) addrs_per_page(inode, false)/* Node IDs in an Indirect Block */#define NIDS_PER_BLOCK ((F2FS_BLKSIZE - sizeof(struct node_footer)) / sizeof(__le32))
#define ADDRS_PER_PAGE(folio, inode) (addrs_per_page(inode, IS_INODE(folio)))
#define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1)#define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2)#define NODE_IND1_BLOCK (DEF_ADDRS_PER_INODE + 3)#define NODE_IND2_BLOCK (DEF_ADDRS_PER_INODE + 4)#define NODE_DIND_BLOCK (DEF_ADDRS_PER_INODE + 5)
#define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */#define F2FS_INLINE_DATA 0x02 /* file inline data flag */#define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */#define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */#define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries (obsolete) */#define F2FS_EXTRA_ATTR 0x20 /* file having extra attribute */#define F2FS_PIN_FILE 0x40 /* file should not be gced */#define F2FS_COMPRESS_RELEASED 0x80 /* file released compressed blocks */
struct f2fs_inode { __le16 i_mode; /* file mode */ __u8 i_advise; /* file hints */ __u8 i_inline; /* file inline flags */ __le32 i_uid; /* user ID */ __le32 i_gid; /* group ID */ __le32 i_links; /* links count */ __le64 i_size; /* file size in bytes */ __le64 i_blocks; /* file size in blocks */ __le64 i_atime; /* access time */ __le64 i_ctime; /* change time */ __le64 i_mtime; /* modification time */ __le32 i_atime_nsec; /* access time in nano scale */ __le32 i_ctime_nsec; /* change time in nano scale */ __le32 i_mtime_nsec; /* modification time in nano scale */ __le32 i_generation; /* file version (for NFS) */ union { __le32 i_current_depth; /* only for directory depth */ __le16 i_gc_failures; /* * # of gc failures on pinned file. * only for regular files. */ }; __le32 i_xattr_nid; /* nid to save xattr */ __le32 i_flags; /* file attributes */ __le32 i_pino; /* parent inode number */ __le32 i_namelen; /* file name length */ __u8 i_name[F2FS_NAME_LEN]; /* file name for SPOR */ __u8 i_dir_level; /* dentry_level for large dir */
struct f2fs_extent i_ext; /* caching a largest extent */
union { struct { __le16 i_extra_isize; /* extra inode attribute size */ __le16 i_inline_xattr_size; /* inline xattr size, unit: 4 bytes */ __le32 i_projid; /* project id */ __le32 i_inode_checksum;/* inode meta checksum */ __le64 i_crtime; /* creation time */ __le32 i_crtime_nsec; /* creation time in nano scale */ __le64 i_compr_blocks; /* # of compressed blocks */ __u8 i_compress_algorithm; /* compress algorithm */ __u8 i_log_cluster_size; /* log of cluster size */ __le16 i_compress_flag; /* compress flag */ /* 0 bit: chksum flag * [8,15] bits: compress level */ __le32 i_extra_end[0]; /* for attribute size calculation */ } __packed; __le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */ }; __le32 i_nid[DEF_NIDS_PER_INODE]; /* direct(2), indirect(2), double_indirect(1) node id */} __packed;
struct direct_node { __le32 addr[DEF_ADDRS_PER_BLOCK]; /* array of data block address */} __packed;
struct indirect_node { __le32 nid[NIDS_PER_BLOCK]; /* array of data block address */} __packed;
enum { COLD_BIT_SHIFT = 0, FSYNC_BIT_SHIFT, DENT_BIT_SHIFT, OFFSET_BIT_SHIFT};
#define OFFSET_BIT_MASK GENMASK(OFFSET_BIT_SHIFT - 1, 0)
struct f2fs_node { /* can be one of three types: inode, direct, and indirect types */ union { struct f2fs_inode i; struct direct_node dn; struct indirect_node in; }; struct node_footer footer;} __packed;
/* * For NAT entries */#define NAT_ENTRY_PER_BLOCK (F2FS_BLKSIZE / sizeof(struct f2fs_nat_entry))
struct f2fs_nat_entry { __u8 version; /* latest version of cached nat entry */ __le32 ino; /* inode number */ __le32 block_addr; /* block address */} __packed;
struct f2fs_nat_block { struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK];} __packed;
/* * For SIT entries * * A validity bitmap of 64 bytes covers 512 blocks of area. For a 4K page size, * this results in a segment size of 2MB. For 16k pages, the default segment size * is 8MB. * Not allow to change this. */#define SIT_VBLOCK_MAP_SIZE 64#define SIT_ENTRY_PER_BLOCK (F2FS_BLKSIZE / sizeof(struct f2fs_sit_entry))
/* * F2FS uses 4 bytes to represent block address. As a result, supported size of * disk is 16 TB for a 4K page size and 64 TB for a 16K page size and it equals * to 16 * 1024 * 1024 / 2 segments. */#define F2FS_MAX_SEGMENT ((16 * 1024 * 1024) / 2)
/* * Note that f2fs_sit_entry->vblocks has the following bit-field information. * [15:10] : allocation type such as CURSEG_XXXX_TYPE * [9:0] : valid block count */#define SIT_VBLOCKS_SHIFT 10#define SIT_VBLOCKS_MASK ((1 << SIT_VBLOCKS_SHIFT) - 1)#define GET_SIT_VBLOCKS(raw_sit) \ (le16_to_cpu((raw_sit)->vblocks) & SIT_VBLOCKS_MASK)#define GET_SIT_TYPE(raw_sit) \ ((le16_to_cpu((raw_sit)->vblocks) & ~SIT_VBLOCKS_MASK) \ >> SIT_VBLOCKS_SHIFT)
struct f2fs_sit_entry { __le16 vblocks; /* reference above */ __u8 valid_map[SIT_VBLOCK_MAP_SIZE]; /* bitmap for valid blocks */ __le64 mtime; /* segment age for cleaning */} __packed;
struct f2fs_sit_block { struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK];} __packed;
/* * For segment summary * * One summary block with 4KB size contains exactly 512 summary entries, which * represents exactly one segment with 2MB size. * Similarly, in the case of block with 16KB size, it represents one segment with 8MB size. * Not allow to change the basic units. * * NOTE: For initializing fields, you must use set_summary * * - If data page, nid represents dnode's nid * - If node page, nid represents the node page's nid. * * The ofs_in_node is used by only data page. It represents offset * from node's page's beginning to get a data block address. * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node) */#define SUMMARY_SIZE (7) /* sizeof(struct f2fs_summary) */#define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */
/* a summary entry for a block in a segment */struct f2fs_summary { __le32 nid; /* parent node id */ union { __u8 reserved[3]; struct { __u8 version; /* node version number */ __le16 ofs_in_node; /* block index in parent node */ } __packed; };} __packed;
/* summary block type, node or data, is stored to the summary_footer */#define SUM_TYPE_NODE (1)#define SUM_TYPE_DATA (0)
struct summary_footer { unsigned char entry_type; /* SUM_TYPE_XXX */ __le32 check_sum; /* summary checksum */} __packed;
/* * frequently updated NAT/SIT entries can be stored in the spare area in * summary blocks */enum { NAT_JOURNAL = 0, SIT_JOURNAL};
struct nat_journal_entry { __le32 nid; struct f2fs_nat_entry ne;} __packed;
/* * The nat_journal structure is a placeholder whose actual size varies depending * on the use of packed_ssa. Therefore, it must always be accessed only through * specific sets of macros and fields, and size calculations should use * size-related macros instead of sizeof(). * Relevant macros: sbi->nat_journal_entries, nat_in_journal(), * nid_in_journal(), MAX_NAT_JENTRIES(). */struct nat_journal { struct nat_journal_entry entries[0];} __packed;
struct sit_journal_entry { __le32 segno; struct f2fs_sit_entry se;} __packed;
/* * The sit_journal structure is a placeholder whose actual size varies depending * on the use of packed_ssa. Therefore, it must always be accessed only through * specific sets of macros and fields, and size calculations should use * size-related macros instead of sizeof(). * Relevant macros: sbi->sit_journal_entries, sit_in_journal(), * segno_in_journal(), MAX_SIT_JENTRIES(). */struct sit_journal { struct sit_journal_entry entries[0];} __packed;
struct f2fs_extra_info { __le64 kbytes_written; __u8 reserved[];} __packed;
struct f2fs_journal { union { __le16 n_nats; __le16 n_sits; }; /* spare area is used by NAT or SIT journals or extra info */ union { struct nat_journal nat_j; struct sit_journal sit_j; struct f2fs_extra_info info; };} __packed;
/* * Block-sized summary block structure * * The f2fs_summary_block structure is a placeholder whose actual size varies * depending on the use of packed_ssa. Therefore, it must always be accessed * only through specific sets of macros and fields, and size calculations should * use size-related macros instead of sizeof(). * Relevant macros: sbi->sum_blocksize, sbi->entries_in_sum, * sbi->sum_entry_size, sum_entries(), sum_journal(), sum_footer(). * * Summary Block Layout * * +-----------------------+ <--- Block Start * | struct f2fs_summary | * | entries[0] | * | ... | * | entries[N-1] | * +-----------------------+ * | struct f2fs_journal | * +-----------------------+ * | struct summary_footer | * +-----------------------+ <--- Block End */struct f2fs_summary_block { struct f2fs_summary entries[0]; // struct f2fs_journal journal; // struct summary_footer footer;} __packed;
/* * For directory operations */#define F2FS_DOT_HASH 0#define F2FS_DDOT_HASH F2FS_DOT_HASH#define F2FS_MAX_HASH (~((0x3ULL) << 62))#define F2FS_HASH_COL_BIT ((0x1ULL) << 63)
typedef __le32 f2fs_hash_t;
/* One directory entry slot covers 8bytes-long file name */#define F2FS_SLOT_LEN 8#define F2FS_SLOT_LEN_BITS 3
#define GET_DENTRY_SLOTS(x) (((x) + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS)
/* MAX level for dir lookup */#define MAX_DIR_HASH_DEPTH 63
/* MAX buckets in one level of dir */#define MAX_DIR_BUCKETS BIT((MAX_DIR_HASH_DEPTH / 2) - 1)
/* * space utilization of regular dentry and inline dentry (w/o extra reservation) * when block size is 4KB. * regular dentry inline dentry (def) inline dentry (min) * bitmap 1 * 27 = 27 1 * 23 = 23 1 * 1 = 1 * reserved 1 * 3 = 3 1 * 7 = 7 1 * 1 = 1 * dentry 11 * 214 = 2354 11 * 182 = 2002 11 * 2 = 22 * filename 8 * 214 = 1712 8 * 182 = 1456 8 * 2 = 16 * total 4096 3488 40 * * Note: there are more reserved space in inline dentry than in regular * dentry, when converting inline dentry we should handle this carefully. */
/* the number of dentry in a block */#define NR_DENTRY_IN_BLOCK ((BITS_PER_BYTE * F2FS_BLKSIZE) / \ ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * BITS_PER_BYTE + 1))#define SIZE_OF_DIR_ENTRY 11 /* by byte */#define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ BITS_PER_BYTE)#define SIZE_OF_RESERVED (F2FS_BLKSIZE - ((SIZE_OF_DIR_ENTRY + \ F2FS_SLOT_LEN) * \ NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP))#define MIN_INLINE_DENTRY_SIZE 40 /* just include '.' and '..' entries */
/* One directory entry slot representing F2FS_SLOT_LEN-sized file name */struct f2fs_dir_entry { __le32 hash_code; /* hash code of file name */ __le32 ino; /* inode number */ __le16 name_len; /* length of file name */ __u8 file_type; /* file type */} __packed;
/* Block-sized directory entry block */struct f2fs_dentry_block { /* validity bitmap for directory entries in each block */ __u8 dentry_bitmap[SIZE_OF_DENTRY_BITMAP]; __u8 reserved[SIZE_OF_RESERVED]; struct f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK]; __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN];} __packed;
#define F2FS_DEF_PROJID 0 /* default project ID */
#endif /* _LINUX_F2FS_FS_H */