libc/kernel/uapi/linux/nilfs2_ondisk.h - android_bionic - Gitiles

 /****************************************************************************
  ****************************************************************************
  ***
  ***   This header was automatically generated from a Linux kernel header
  ***   of the same name, to make information necessary for userspace to
  ***   call into the kernel available to libc.  It contains only constants,
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
  ***   To edit the content of this header, modify the corresponding
  ***   source file (e.g. under external/kernel-headers/original/) then
  ***   run bionic/libc/kernel/tools/update_all.py
  ***
  ***   Any manual change here will be lost the next time this script will
  ***   be run. You've been warned!
  ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef _LINUX_NILFS2_ONDISK_H
 #define _LINUX_NILFS2_ONDISK_H
 #include <linux/types.h>
 #include <linux/magic.h>
 #define NILFS_INODE_BMAP_SIZE 7
 struct nilfs_inode {
   __le64 i_blocks;
   __le64 i_size;
   __le64 i_ctime;
   __le64 i_mtime;
   __le32 i_ctime_nsec;
   __le32 i_mtime_nsec;
   __le32 i_uid;
   __le32 i_gid;
   __le16 i_mode;
   __le16 i_links_count;
   __le32 i_flags;
   __le64 i_bmap[NILFS_INODE_BMAP_SIZE];
 #define i_device_code i_bmap[0]
   __le64 i_xattr;
   __le32 i_generation;
   __le32 i_pad;
 };
 #define NILFS_MIN_INODE_SIZE 128
 struct nilfs_super_root {
   __le32 sr_sum;
   __le16 sr_bytes;
   __le16 sr_flags;
   __le64 sr_nongc_ctime;
   struct nilfs_inode sr_dat;
   struct nilfs_inode sr_cpfile;
   struct nilfs_inode sr_sufile;
 };
 #define NILFS_SR_MDT_OFFSET(inode_size,i) ((unsigned long) & ((struct nilfs_super_root *) 0)->sr_dat + (inode_size) * (i))
 #define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0)
 #define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1)
 #define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2)
 #define NILFS_SR_BYTES(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 3)
 #define NILFS_DFL_MAX_MNT_COUNT 50
 #define NILFS_VALID_FS 0x0001
 #define NILFS_ERROR_FS 0x0002
 #define NILFS_RESIZE_FS 0x0004
 #define NILFS_MOUNT_ERROR_MODE 0x0070
 #define NILFS_MOUNT_ERRORS_CONT 0x0010
 #define NILFS_MOUNT_ERRORS_RO 0x0020
 #define NILFS_MOUNT_ERRORS_PANIC 0x0040
 #define NILFS_MOUNT_BARRIER 0x1000
 #define NILFS_MOUNT_STRICT_ORDER 0x2000
 #define NILFS_MOUNT_NORECOVERY 0x4000
 #define NILFS_MOUNT_DISCARD 0x8000
 struct nilfs_super_block {
   __le32 s_rev_level;
   __le16 s_minor_rev_level;
   __le16 s_magic;
   __le16 s_bytes;
   __le16 s_flags;
   __le32 s_crc_seed;
   __le32 s_sum;
   __le32 s_log_block_size;
   __le64 s_nsegments;
   __le64 s_dev_size;
   __le64 s_first_data_block;
   __le32 s_blocks_per_segment;
   __le32 s_r_segments_percentage;
   __le64 s_last_cno;
   __le64 s_last_pseg;
   __le64 s_last_seq;
   __le64 s_free_blocks_count;
   __le64 s_ctime;
   __le64 s_mtime;
   __le64 s_wtime;
   __le16 s_mnt_count;
   __le16 s_max_mnt_count;
   __le16 s_state;
   __le16 s_errors;
   __le64 s_lastcheck;
   __le32 s_checkinterval;
   __le32 s_creator_os;
   __le16 s_def_resuid;
   __le16 s_def_resgid;
   __le32 s_first_ino;
   __le16 s_inode_size;
   __le16 s_dat_entry_size;
   __le16 s_checkpoint_size;
   __le16 s_segment_usage_size;
   __u8 s_uuid[16];
   char s_volume_name[80];
   __le32 s_c_interval;
   __le32 s_c_block_max;
   __le64 s_feature_compat;
   __le64 s_feature_compat_ro;
   __le64 s_feature_incompat;
   __u32 s_reserved[186];
 };
 #define NILFS_OS_LINUX 0
 #define NILFS_CURRENT_REV 2
 #define NILFS_MINOR_REV 0
 #define NILFS_MIN_SUPP_REV 2
 #define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT 0x00000001ULL
 #define NILFS_FEATURE_COMPAT_SUPP 0ULL
 #define NILFS_FEATURE_COMPAT_RO_SUPP NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
 #define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
 #define NILFS_SB_BYTES ((long) & ((struct nilfs_super_block *) 0)->s_reserved)
 #define NILFS_ROOT_INO 2
 #define NILFS_DAT_INO 3
 #define NILFS_CPFILE_INO 4
 #define NILFS_SUFILE_INO 5
 #define NILFS_IFILE_INO 6
 #define NILFS_ATIME_INO 7
 #define NILFS_XATTR_INO 8
 #define NILFS_SKETCH_INO 10
 #define NILFS_USER_INO 11
 #define NILFS_SB_OFFSET_BYTES 1024
 #define NILFS_SEG_MIN_BLOCKS 16
 #define NILFS_PSEG_MIN_BLOCKS 2
 #define NILFS_MIN_NRSVSEGS 8
 #define NILFS_ROOT_METADATA_FILE(ino) ((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)
 #define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
 #define NILFS_LINK_MAX 32000
 #define NILFS_NAME_LEN 255
 #define NILFS_MIN_BLOCK_SIZE 1024
 #define NILFS_MAX_BLOCK_SIZE 65536
 struct nilfs_dir_entry {
   __le64 inode;
   __le16 rec_len;
   __u8 name_len;
   __u8 file_type;
   char name[NILFS_NAME_LEN];
   char pad;
 };
 enum {
   NILFS_FT_UNKNOWN,
   NILFS_FT_REG_FILE,
   NILFS_FT_DIR,
   NILFS_FT_CHRDEV,
   NILFS_FT_BLKDEV,
   NILFS_FT_FIFO,
   NILFS_FT_SOCK,
   NILFS_FT_SYMLINK,
   NILFS_FT_MAX
 };
 #define NILFS_DIR_PAD 8
 #define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
 #define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & ~NILFS_DIR_ROUND)
 #define NILFS_MAX_REC_LEN ((1 << 16) - 1)
 struct nilfs_finfo {
   __le64 fi_ino;
   __le64 fi_cno;
   __le32 fi_nblocks;
   __le32 fi_ndatablk;
 };
 struct nilfs_binfo_v {
   __le64 bi_vblocknr;
   __le64 bi_blkoff;
 };
 struct nilfs_binfo_dat {
   __le64 bi_blkoff;
   __u8 bi_level;
   __u8 bi_pad[7];
 };
 union nilfs_binfo {
   struct nilfs_binfo_v bi_v;
   struct nilfs_binfo_dat bi_dat;
 };
 struct nilfs_segment_summary {
   __le32 ss_datasum;
   __le32 ss_sumsum;
   __le32 ss_magic;
   __le16 ss_bytes;
   __le16 ss_flags;
   __le64 ss_seq;
   __le64 ss_create;
   __le64 ss_next;
   __le32 ss_nblocks;
   __le32 ss_nfinfo;
   __le32 ss_sumbytes;
   __le32 ss_pad;
   __le64 ss_cno;
 };
 #define NILFS_SEGSUM_MAGIC 0x1eaffa11
 #define NILFS_SS_LOGBGN 0x0001
 #define NILFS_SS_LOGEND 0x0002
 #define NILFS_SS_SR 0x0004
 #define NILFS_SS_SYNDT 0x0008
 #define NILFS_SS_GC 0x0010
 struct nilfs_btree_node {
   __u8 bn_flags;
   __u8 bn_level;
   __le16 bn_nchildren;
   __le32 bn_pad;
 };
 #define NILFS_BTREE_NODE_ROOT 0x01
 #define NILFS_BTREE_LEVEL_DATA 0
 #define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
 #define NILFS_BTREE_LEVEL_MAX 14
 struct nilfs_direct_node {
   __u8 dn_flags;
   __u8 pad[7];
 };
 struct nilfs_palloc_group_desc {
   __le32 pg_nfrees;
 };
 struct nilfs_dat_entry {
   __le64 de_blocknr;
   __le64 de_start;
   __le64 de_end;
   __le64 de_rsv;
 };
 #define NILFS_MIN_DAT_ENTRY_SIZE 32
 struct nilfs_snapshot_list {
   __le64 ssl_next;
   __le64 ssl_prev;
 };
 struct nilfs_checkpoint {
   __le32 cp_flags;
   __le32 cp_checkpoints_count;
   struct nilfs_snapshot_list cp_snapshot_list;
   __le64 cp_cno;
   __le64 cp_create;
   __le64 cp_nblk_inc;
   __le64 cp_inodes_count;
   __le64 cp_blocks_count;
   struct nilfs_inode cp_ifile_inode;
 };
 #define NILFS_MIN_CHECKPOINT_SIZE (64 + NILFS_MIN_INODE_SIZE)
 enum {
   NILFS_CHECKPOINT_SNAPSHOT,
   NILFS_CHECKPOINT_INVALID,
   NILFS_CHECKPOINT_SKETCH,
   NILFS_CHECKPOINT_MINOR,
 };
 #define NILFS_CHECKPOINT_FNS(flag,name) static inline void nilfs_checkpoint_set_ ##name(struct nilfs_checkpoint * cp) \
 { cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) | (1UL << NILFS_CHECKPOINT_ ##flag)); \
 } static inline void nilfs_checkpoint_clear_ ##name(struct nilfs_checkpoint * cp) \
 { cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & ~(1UL << NILFS_CHECKPOINT_ ##flag)); \
 } static inline int nilfs_checkpoint_ ##name(const struct nilfs_checkpoint * cp) \
 { return ! ! (le32_to_cpu(cp->cp_flags) & (1UL << NILFS_CHECKPOINT_ ##flag)); \
 }
 #define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET ((sizeof(struct nilfs_cpfile_header) + sizeof(struct nilfs_checkpoint) - 1) / sizeof(struct nilfs_checkpoint))
 struct nilfs_segment_usage {
   __le64 su_lastmod;
   __le32 su_nblocks;
   __le32 su_flags;
 };
 #define NILFS_MIN_SEGMENT_USAGE_SIZE 16
 enum {
   NILFS_SEGMENT_USAGE_ACTIVE,
   NILFS_SEGMENT_USAGE_DIRTY,
   NILFS_SEGMENT_USAGE_ERROR,
 };
 #define NILFS_SEGMENT_USAGE_FNS(flag,name) static inline void nilfs_segment_usage_set_ ##name(struct nilfs_segment_usage * su) \
 { su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) | (1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
 } static inline void nilfs_segment_usage_clear_ ##name(struct nilfs_segment_usage * su) \
 { su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) & ~(1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
 } static inline int nilfs_segment_usage_ ##name(const struct nilfs_segment_usage * su) \
 { return ! ! (le32_to_cpu(su->su_flags) & (1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
 }
 struct nilfs_sufile_header {
   __le64 sh_ncleansegs;
   __le64 sh_ndirtysegs;
   __le64 sh_last_alloc;
 };
 #define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET ((sizeof(struct nilfs_sufile_header) + sizeof(struct nilfs_segment_usage) - 1) / sizeof(struct nilfs_segment_usage))
 #endif
	/****************************************************************************
	****************************************************************************
	***
	*** This header was automatically generated from a Linux kernel header
	*** of the same name, to make information necessary for userspace to
	*** call into the kernel available to libc. It contains only constants,
	*** structures, and macros generated from the original header, and thus,
	*** contains no copyrightable information.
	***
	*** To edit the content of this header, modify the corresponding
	*** source file (e.g. under external/kernel-headers/original/) then
	*** run bionic/libc/kernel/tools/update_all.py
	***
	*** Any manual change here will be lost the next time this script will
	*** be run. You've been warned!
	***
	****************************************************************************
	****************************************************************************/
	#ifndef _LINUX_NILFS2_ONDISK_H
	#define _LINUX_NILFS2_ONDISK_H
	#include <linux/types.h>
	#include <linux/magic.h>
	#define NILFS_INODE_BMAP_SIZE 7
	struct nilfs_inode {
	__le64 i_blocks;
	__le64 i_size;
	__le64 i_ctime;
	__le64 i_mtime;
	__le32 i_ctime_nsec;
	__le32 i_mtime_nsec;
	__le32 i_uid;
	__le32 i_gid;
	__le16 i_mode;
	__le16 i_links_count;
	__le32 i_flags;
	__le64 i_bmap[NILFS_INODE_BMAP_SIZE];
	#define i_device_code i_bmap[0]
	__le64 i_xattr;
	__le32 i_generation;
	__le32 i_pad;
	};
	#define NILFS_MIN_INODE_SIZE 128
	struct nilfs_super_root {
	__le32 sr_sum;
	__le16 sr_bytes;
	__le16 sr_flags;
	__le64 sr_nongc_ctime;
	struct nilfs_inode sr_dat;
	struct nilfs_inode sr_cpfile;
	struct nilfs_inode sr_sufile;
	};
	#define NILFS_SR_MDT_OFFSET(inode_size,i) ((unsigned long) & ((struct nilfs_super_root ) 0)->sr_dat + (inode_size) (i))
	#define NILFS_SR_DAT_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 0)
	#define NILFS_SR_CPFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 1)
	#define NILFS_SR_SUFILE_OFFSET(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 2)
	#define NILFS_SR_BYTES(inode_size) NILFS_SR_MDT_OFFSET(inode_size, 3)
	#define NILFS_DFL_MAX_MNT_COUNT 50
	#define NILFS_VALID_FS 0x0001
	#define NILFS_ERROR_FS 0x0002
	#define NILFS_RESIZE_FS 0x0004
	#define NILFS_MOUNT_ERROR_MODE 0x0070
	#define NILFS_MOUNT_ERRORS_CONT 0x0010
	#define NILFS_MOUNT_ERRORS_RO 0x0020
	#define NILFS_MOUNT_ERRORS_PANIC 0x0040
	#define NILFS_MOUNT_BARRIER 0x1000
	#define NILFS_MOUNT_STRICT_ORDER 0x2000
	#define NILFS_MOUNT_NORECOVERY 0x4000
	#define NILFS_MOUNT_DISCARD 0x8000
	struct nilfs_super_block {
	__le32 s_rev_level;
	__le16 s_minor_rev_level;
	__le16 s_magic;
	__le16 s_bytes;
	__le16 s_flags;
	__le32 s_crc_seed;
	__le32 s_sum;
	__le32 s_log_block_size;
	__le64 s_nsegments;
	__le64 s_dev_size;
	__le64 s_first_data_block;
	__le32 s_blocks_per_segment;
	__le32 s_r_segments_percentage;
	__le64 s_last_cno;
	__le64 s_last_pseg;
	__le64 s_last_seq;
	__le64 s_free_blocks_count;
	__le64 s_ctime;
	__le64 s_mtime;
	__le64 s_wtime;
	__le16 s_mnt_count;
	__le16 s_max_mnt_count;
	__le16 s_state;
	__le16 s_errors;
	__le64 s_lastcheck;
	__le32 s_checkinterval;
	__le32 s_creator_os;
	__le16 s_def_resuid;
	__le16 s_def_resgid;
	__le32 s_first_ino;
	__le16 s_inode_size;
	__le16 s_dat_entry_size;
	__le16 s_checkpoint_size;
	__le16 s_segment_usage_size;
	__u8 s_uuid[16];
	char s_volume_name[80];
	__le32 s_c_interval;
	__le32 s_c_block_max;
	__le64 s_feature_compat;
	__le64 s_feature_compat_ro;
	__le64 s_feature_incompat;
	__u32 s_reserved[186];
	};
	#define NILFS_OS_LINUX 0
	#define NILFS_CURRENT_REV 2
	#define NILFS_MINOR_REV 0
	#define NILFS_MIN_SUPP_REV 2
	#define NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT 0x00000001ULL
	#define NILFS_FEATURE_COMPAT_SUPP 0ULL
	#define NILFS_FEATURE_COMPAT_RO_SUPP NILFS_FEATURE_COMPAT_RO_BLOCK_COUNT
	#define NILFS_FEATURE_INCOMPAT_SUPP 0ULL
	#define NILFS_SB_BYTES ((long) & ((struct nilfs_super_block *) 0)->s_reserved)
	#define NILFS_ROOT_INO 2
	#define NILFS_DAT_INO 3
	#define NILFS_CPFILE_INO 4
	#define NILFS_SUFILE_INO 5
	#define NILFS_IFILE_INO 6
	#define NILFS_ATIME_INO 7
	#define NILFS_XATTR_INO 8
	#define NILFS_SKETCH_INO 10
	#define NILFS_USER_INO 11
	#define NILFS_SB_OFFSET_BYTES 1024
	#define NILFS_SEG_MIN_BLOCKS 16
	#define NILFS_PSEG_MIN_BLOCKS 2
	#define NILFS_MIN_NRSVSEGS 8
	#define NILFS_ROOT_METADATA_FILE(ino) ((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)
	#define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
	#define NILFS_LINK_MAX 32000
	#define NILFS_NAME_LEN 255
	#define NILFS_MIN_BLOCK_SIZE 1024
	#define NILFS_MAX_BLOCK_SIZE 65536
	struct nilfs_dir_entry {
	__le64 inode;
	__le16 rec_len;
	__u8 name_len;
	__u8 file_type;
	char name[NILFS_NAME_LEN];
	char pad;
	};
	enum {
	NILFS_FT_UNKNOWN,
	NILFS_FT_REG_FILE,
	NILFS_FT_DIR,
	NILFS_FT_CHRDEV,
	NILFS_FT_BLKDEV,
	NILFS_FT_FIFO,
	NILFS_FT_SOCK,
	NILFS_FT_SYMLINK,
	NILFS_FT_MAX
	};
	#define NILFS_DIR_PAD 8
	#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
	#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & ~NILFS_DIR_ROUND)
	#define NILFS_MAX_REC_LEN ((1 << 16) - 1)
	struct nilfs_finfo {
	__le64 fi_ino;
	__le64 fi_cno;
	__le32 fi_nblocks;
	__le32 fi_ndatablk;
	};
	struct nilfs_binfo_v {
	__le64 bi_vblocknr;
	__le64 bi_blkoff;
	};
	struct nilfs_binfo_dat {
	__le64 bi_blkoff;
	__u8 bi_level;
	__u8 bi_pad[7];
	};
	union nilfs_binfo {
	struct nilfs_binfo_v bi_v;
	struct nilfs_binfo_dat bi_dat;
	};
	struct nilfs_segment_summary {
	__le32 ss_datasum;
	__le32 ss_sumsum;
	__le32 ss_magic;
	__le16 ss_bytes;
	__le16 ss_flags;
	__le64 ss_seq;
	__le64 ss_create;
	__le64 ss_next;
	__le32 ss_nblocks;
	__le32 ss_nfinfo;
	__le32 ss_sumbytes;
	__le32 ss_pad;
	__le64 ss_cno;
	};
	#define NILFS_SEGSUM_MAGIC 0x1eaffa11
	#define NILFS_SS_LOGBGN 0x0001
	#define NILFS_SS_LOGEND 0x0002
	#define NILFS_SS_SR 0x0004
	#define NILFS_SS_SYNDT 0x0008
	#define NILFS_SS_GC 0x0010
	struct nilfs_btree_node {
	__u8 bn_flags;
	__u8 bn_level;
	__le16 bn_nchildren;
	__le32 bn_pad;
	};
	#define NILFS_BTREE_NODE_ROOT 0x01
	#define NILFS_BTREE_LEVEL_DATA 0
	#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
	#define NILFS_BTREE_LEVEL_MAX 14
	struct nilfs_direct_node {
	__u8 dn_flags;
	__u8 pad[7];
	};
	struct nilfs_palloc_group_desc {
	__le32 pg_nfrees;
	};
	struct nilfs_dat_entry {
	__le64 de_blocknr;
	__le64 de_start;
	__le64 de_end;
	__le64 de_rsv;
	};
	#define NILFS_MIN_DAT_ENTRY_SIZE 32
	struct nilfs_snapshot_list {
	__le64 ssl_next;
	__le64 ssl_prev;
	};
	struct nilfs_checkpoint {
	__le32 cp_flags;
	__le32 cp_checkpoints_count;
	struct nilfs_snapshot_list cp_snapshot_list;
	__le64 cp_cno;
	__le64 cp_create;
	__le64 cp_nblk_inc;
	__le64 cp_inodes_count;
	__le64 cp_blocks_count;
	struct nilfs_inode cp_ifile_inode;
	};
	#define NILFS_MIN_CHECKPOINT_SIZE (64 + NILFS_MIN_INODE_SIZE)
	enum {
	NILFS_CHECKPOINT_SNAPSHOT,
	NILFS_CHECKPOINT_INVALID,
	NILFS_CHECKPOINT_SKETCH,
	NILFS_CHECKPOINT_MINOR,
	};
	#define NILFS_CHECKPOINT_FNS(flag,name) static inline void nilfs_checkpoint_set_ ##name(struct nilfs_checkpoint * cp) \
	{ cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) \| (1UL << NILFS_CHECKPOINT_ ##flag)); \
	} static inline void nilfs_checkpoint_clear_ ##name(struct nilfs_checkpoint * cp) \
	{ cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) & ~(1UL << NILFS_CHECKPOINT_ ##flag)); \
	} static inline int nilfs_checkpoint_ ##name(const struct nilfs_checkpoint * cp) \
	{ return ! ! (le32_to_cpu(cp->cp_flags) & (1UL << NILFS_CHECKPOINT_ ##flag)); \
	}
	#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET ((sizeof(struct nilfs_cpfile_header) + sizeof(struct nilfs_checkpoint) - 1) / sizeof(struct nilfs_checkpoint))
	struct nilfs_segment_usage {
	__le64 su_lastmod;
	__le32 su_nblocks;
	__le32 su_flags;
	};
	#define NILFS_MIN_SEGMENT_USAGE_SIZE 16
	enum {
	NILFS_SEGMENT_USAGE_ACTIVE,
	NILFS_SEGMENT_USAGE_DIRTY,
	NILFS_SEGMENT_USAGE_ERROR,
	};
	#define NILFS_SEGMENT_USAGE_FNS(flag,name) static inline void nilfs_segment_usage_set_ ##name(struct nilfs_segment_usage * su) \
	{ su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) \| (1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
	} static inline void nilfs_segment_usage_clear_ ##name(struct nilfs_segment_usage * su) \
	{ su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) & ~(1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
	} static inline int nilfs_segment_usage_ ##name(const struct nilfs_segment_usage * su) \
	{ return ! ! (le32_to_cpu(su->su_flags) & (1UL << NILFS_SEGMENT_USAGE_ ##flag)); \
	}
	struct nilfs_sufile_header {
	__le64 sh_ncleansegs;
	__le64 sh_ndirtysegs;
	__le64 sh_last_alloc;
	};
	#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET ((sizeof(struct nilfs_sufile_header) + sizeof(struct nilfs_segment_usage) - 1) / sizeof(struct nilfs_segment_usage))
	#endif