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#ifndef __NILFS_FS_H
#define __NILFS_FS_H
#define NILFS_SUPER_MAGIC 0x3434 /* NILFS filesystem magic number */
/*
* struct nilfs_super_block - structure of super block on disk
*/
struct nilfs_super_block {
__le32 s_rev_level; /* Revision level */
__le16 s_minor_rev_level; /* minor revision level */
__le16 s_magic; /* Magic signature */
__le16 s_bytes; /* Bytes count of CRC calculation
for this structure. s_reserved
is excluded. */
__le16 s_flags; /* flags */
__le32 s_crc_seed; /* Seed value of CRC calculation */
__le32 s_sum; /* Check sum of super block */
__le32 s_log_block_size; /* Block size represented as follows
blocksize = 1 << (s_log_block_size + 10) */
__le64 s_nsegments; /* Number of segments in filesystem */
__le64 s_dev_size; /* block device size in bytes */
__le64 s_first_data_block; /* 1st seg disk block number */
__le32 s_blocks_per_segment; /* number of blocks per full segment */
__le32 s_r_segments_percentage;/* Reserved segments percentage */ /* or __le16 */
__le64 s_last_cno; /* Last checkpoint number */
__le64 s_last_pseg; /* disk block addr pseg written last */
__le64 s_last_seq; /* seq. number of seg written last */
__le64 s_free_blocks_count; /* Free blocks count */
__le64 s_ctime; /* Creation time (execution time of newfs) */
__le64 s_mtime; /* Mount time */
__le64 s_wtime; /* Write time */
__le16 s_mnt_count; /* Mount count */
__le16 s_max_mnt_count; /* Maximal mount count */
__le16 s_state; /* File system state */
__le16 s_errors; /* Behaviour when detecting errors */
__le64 s_lastcheck; /* time of last check */
__le32 s_checkinterval; /* max. time between checks */
__le32 s_creator_os; /* OS */
__le16 s_def_resuid; /* Default uid for reserved blocks */
__le16 s_def_resgid; /* Default gid for reserved blocks */
__le32 s_first_ino; /* First non-reserved inode */ /* or __le16 */
__le16 s_inode_size; /* Size of an inode */
__le16 s_dat_entry_size; /* Size of a dat entry */
__le16 s_checkpoint_size; /* Size of a checkpoint */
__le16 s_segment_usage_size; /* Size of a segment usage */
__u8 s_uuid[16]; /* 128-bit uuid for volume */
char s_volume_name[16]; /* volume name */
char s_last_mounted[64]; /* directory where last mounted */
__le32 s_c_interval; /* Commit interval of segment */
__le32 s_c_block_max; /* Threshold of data amount for
the segment construction */
__u32 s_reserved[192]; /* padding to the end of the block */
};
#endif /* __NILFS_FS_H */
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