/* SPDX-License-Identifier: LGPL-2.1 */
/*
* Copyright (c) 1995-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_FS_H__
#define __XFS_FS_H__
/*
* SGI's XFS filesystem's major stuff (constants, structures)
* NOTE: This file must be compile-able with C++ compilers.
*/
/*
* Direct I/O attribute record used with XFS_IOC_DIOINFO
* d_miniosz is the min xfer size, xfer size multiple and file seek offset
* alignment.
*/
#ifndef HAVE_DIOATTR
struct dioattr {
__u32 d_mem; /* data buffer memory alignment */
__u32 d_miniosz; /* min xfer size */
__u32 d_maxiosz; /* max xfer size */
};
#endif
/*
* Structure for XFS_IOC_GETBMAP.
* On input, fill in bmv_offset and bmv_length of the first structure
* to indicate the area of interest in the file, and bmv_entries with
* the number of array elements given back. The first structure is
* updated on return to give the offset and length for the next call.
*/
#ifndef HAVE_GETBMAP
struct getbmap {
__s64 bmv_offset; /* file offset of segment in blocks */
__s64 bmv_block; /* starting block (64-bit daddr_t) */
__s64 bmv_length; /* length of segment, blocks */
__s32 bmv_count; /* # of entries in array incl. 1st */
__s32 bmv_entries; /* # of entries filled in (output) */
};
#endif
/*
* Structure for XFS_IOC_GETBMAPX. Fields bmv_offset through bmv_entries
* are used exactly as in the getbmap structure. The getbmapx structure
* has additional bmv_iflags and bmv_oflags fields. The bmv_iflags field
* is only used for the first structure. It contains input flags
* specifying XFS_IOC_GETBMAPX actions. The bmv_oflags field is filled
* in by the XFS_IOC_GETBMAPX command for each returned structure after
* the first.
*/
#ifndef HAVE_GETBMAPX
struct getbmapx {
__s64 bmv_offset; /* file offset of segment in blocks */
__s64 bmv_block; /* starting block (64-bit daddr_t) */
__s64 bmv_length; /* length of segment, blocks */
__s32 bmv_count; /* # of entries in array incl. 1st */
__s32 bmv_entries; /* # of entries filled in (output). */
__s32 bmv_iflags; /* input flags (1st structure) */
__s32 bmv_oflags; /* output flags (after 1st structure)*/
__s32 bmv_unused1; /* future use */
__s32 bmv_unused2; /* future use */
};
#endif
/* bmv_iflags values - set by XFS_IOC_GETBMAPX caller. */
#define BMV_IF_ATTRFORK 0x1 /* return attr fork rather than data */
#define BMV_IF_NO_DMAPI_READ 0x2 /* Deprecated */
#define BMV_IF_PREALLOC 0x4 /* rtn status BMV_OF_PREALLOC if req */
#define BMV_IF_DELALLOC 0x8 /* rtn status BMV_OF_DELALLOC if req */
#define BMV_IF_NO_HOLES 0x10 /* Do not return holes */
#define BMV_IF_COWFORK 0x20 /* return CoW fork rather than data */
#define BMV_IF_VALID \
(BMV_IF_ATTRFORK|BMV_IF_NO_DMAPI_READ|BMV_IF_PREALLOC| \
BMV_IF_DELALLOC|BMV_IF_NO_HOLES|BMV_IF_COWFORK)
/* bmv_oflags values - returned for each non-header segment */
#define BMV_OF_PREALLOC 0x1 /* segment = unwritten pre-allocation */
#define BMV_OF_DELALLOC 0x2 /* segment = delayed allocation */
#define BMV_OF_LAST 0x4 /* segment is the last in the file */
#define BMV_OF_SHARED 0x8 /* segment shared with another file */
/* fmr_owner special values for FS_IOC_GETFSMAP */
#define XFS_FMR_OWN_FREE FMR_OWN_FREE /* free space */
#define XFS_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */
#define XFS_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */
#define XFS_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */
#define XFS_FMR_OWN_AG FMR_OWNER('X', 3) /* per-AG metadata */
#define XFS_FMR_OWN_INOBT FMR_OWNER('X', 4) /* inode btree blocks */
#define XFS_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */
#define XFS_FMR_OWN_REFC FMR_OWNER('X', 6) /* refcount tree */
#define XFS_FMR_OWN_COW FMR_OWNER('X', 7) /* cow staging */
#define XFS_FMR_OWN_DEFECTIVE FMR_OWNER('X', 8) /* bad blocks */
/*
* File segment locking set data type for 64 bit access.
* Also used for all the RESV/FREE interfaces.
*/
typedef struct xfs_flock64 {
__s16 l_type;
__s16 l_whence;
__s64 l_start;
__s64 l_len; /* len == 0 means until end of file */
__s32 l_sysid;
__u32 l_pid;
__s32 l_pad[4]; /* reserve area */
} xfs_flock64_t;
/*
* Output for XFS_IOC_FSGEOMETRY_V1
*/
struct xfs_fsop_geom_v1 {
__u32 blocksize; /* filesystem (data) block size */
__u32 rtextsize; /* realtime extent size */
__u32 agblocks; /* fsblocks in an AG */
__u32 agcount; /* number of allocation groups */
__u32 logblocks; /* fsblocks in the log */
__u32 sectsize; /* (data) sector size, bytes */
__u32 inodesize; /* inode size in bytes */
__u32 imaxpct; /* max allowed inode space(%) */
__u64 datablocks; /* fsblocks in data subvolume */
__u64 rtblocks; /* fsblocks in realtime subvol */
__u64 rtextents; /* rt extents in realtime subvol*/
__u64 logstart; /* starting fsblock of the log */
unsigned char uuid[16]; /* unique id of the filesystem */
__u32 sunit; /* stripe unit, fsblocks */
__u32 swidth; /* stripe width, fsblocks */
__s32 version; /* structure version */
__u32 flags; /* superblock version flags */
__u32 logsectsize; /* log sector size, bytes */
__u32 rtsectsize; /* realtime sector size, bytes */
__u32 dirblocksize; /* directory block size, bytes */
};
/*
* Output for XFS_IOC_FSGEOMETRY_V4
*/
struct xfs_fsop_geom_v4 {
__u32 blocksize; /* filesystem (data) block size */
__u32 rtextsize; /* realtime extent size */
__u32 agblocks; /* fsblocks in an AG */
__u32 agcount; /* number of allocation groups */
__u32 logblocks; /* fsblocks in the log */
__u32 sectsize; /* (data) sector size, bytes */
__u32 inodesize; /* inode size in bytes */
__u32 imaxpct; /* max allowed inode space(%) */
__u64 datablocks; /* fsblocks in data subvolume */
__u64 rtblocks; /* fsblocks in realtime subvol */
__u64 rtextents; /* rt extents in realtime subvol*/
__u64 logstart; /* starting fsblock of the log */
unsigned char uuid[16]; /* unique id of the filesystem */
__u32 sunit; /* stripe unit, fsblocks */
__u32 swidth; /* stripe width, fsblocks */
__s32 version; /* structure version */
__u32 flags; /* superblock version flags */
__u32 logsectsize; /* log sector size, bytes */
__u32 rtsectsize; /* realtime sector size, bytes */
__u32 dirblocksize; /* directory block size, bytes */
__u32 logsunit; /* log stripe unit, bytes */
};
/*
* Output for XFS_IOC_FSGEOMETRY
*/
struct xfs_fsop_geom {
__u32 blocksize; /* filesystem (data) block size */
__u32 rtextsize; /* realtime extent size */
__u32 agblocks; /* fsblocks in an AG */
__u32 agcount; /* number of allocation groups */
__u32 logblocks; /* fsblocks in the log */
__u32 sectsize; /* (data) sector size, bytes */
__u32 inodesize; /* inode size in bytes */
__u32 imaxpct; /* max allowed inode space(%) */
__u64 datablocks; /* fsblocks in data subvolume */
__u64 rtblocks; /* fsblocks in realtime subvol */
__u64 rtextents; /* rt extents in realtime subvol*/
__u64 logstart; /* starting fsblock of the log */
unsigned char uuid[16]; /* unique id of the filesystem */
__u32 sunit; /* stripe unit, fsblocks */
__u32 swidth; /* stripe width, fsblocks */
__s32 version; /* structure version */
__u32 flags; /* superblock version flags */
__u32 logsectsize; /* log sector size, bytes */
__u32 rtsectsize; /* realtime sector size, bytes */
__u32 dirblocksize; /* directory block size, bytes */
__u32 logsunit; /* log stripe unit, bytes */
uint32_t sick; /* o: unhealthy fs & rt metadata */
uint32_t checked; /* o: checked fs & rt metadata */
__u64 reserved[17]; /* reserved space */
};
#define XFS_FSOP_GEOM_SICK_COUNTERS (1 << 0) /* summary counters */
#define XFS_FSOP_GEOM_SICK_UQUOTA (1 << 1) /* user quota */
#define XFS_FSOP_GEOM_SICK_GQUOTA (1 << 2) /* group quota */
#define XFS_FSOP_GEOM_SICK_PQUOTA (1 << 3) /* project quota */
#define XFS_FSOP_GEOM_SICK_RT_BITMAP (1 << 4) /* realtime bitmap */
#define XFS_FSOP_GEOM_SICK_RT_SUMMARY (1 << 5) /* realtime summary */
#define XFS_FSOP_GEOM_SICK_QUOTACHECK (1 << 6) /* quota counts */
#define XFS_FSOP_GEOM_SICK_NLINKS (1 << 7) /* inode link counts */
/* Output for XFS_FS_COUNTS */
typedef struct xfs_fsop_counts {
__u64 freedata; /* free data section blocks */
__u64 freertx; /* free rt extents */
__u64 freeino; /* free inodes */
__u64 allocino; /* total allocated inodes */
} xfs_fsop_counts_t;
/* Input/Output for XFS_GET_RESBLKS and XFS_SET_RESBLKS */
typedef struct xfs_fsop_resblks {
__u64 resblks;
__u64 resblks_avail;
} xfs_fsop_resblks_t;
#define XFS_FSOP_GEOM_VERSION 0
#define XFS_FSOP_GEOM_VERSION_V5 5
#define XFS_FSOP_GEOM_FLAGS_ATTR (1 << 0) /* attributes in use */
#define XFS_FSOP_GEOM_FLAGS_NLINK (1 << 1) /* 32-bit nlink values */
#define XFS_FSOP_GEOM_FLAGS_QUOTA (1 << 2) /* quotas enabled */
#define XFS_FSOP_GEOM_FLAGS_IALIGN (1 << 3) /* inode alignment */
#define XFS_FSOP_GEOM_FLAGS_DALIGN (1 << 4) /* large data alignment */
#define XFS_FSOP_GEOM_FLAGS_SHARED (1 << 5) /* read-only shared */
#define XFS_FSOP_GEOM_FLAGS_EXTFLG (1 << 6) /* special extent flag */
#define XFS_FSOP_GEOM_FLAGS_DIRV2 (1 << 7) /* directory version 2 */
#define XFS_FSOP_GEOM_FLAGS_LOGV2 (1 << 8) /* log format version 2 */
#define XFS_FSOP_GEOM_FLAGS_SECTOR (1 << 9) /* sector sizes >1BB */
#define XFS_FSOP_GEOM_FLAGS_ATTR2 (1 << 10) /* inline attributes rework */
#define XFS_FSOP_GEOM_FLAGS_PROJID32 (1 << 11) /* 32-bit project IDs */
#define XFS_FSOP_GEOM_FLAGS_DIRV2CI (1 << 12) /* ASCII only CI names */
/* -- Do not use -- (1 << 13) SGI parent pointers */
#define XFS_FSOP_GEOM_FLAGS_LAZYSB (1 << 14) /* lazy superblock counters */
#define XFS_FSOP_GEOM_FLAGS_V5SB (1 << 15) /* version 5 superblock */
#define XFS_FSOP_GEOM_FLAGS_FTYPE (1 << 16) /* inode directory types */
#define XFS_FSOP_GEOM_FLAGS_FINOBT (1 << 17) /* free inode btree */
#define XFS_FSOP_GEOM_FLAGS_SPINODES (1 << 18) /* sparse inode chunks */
#define XFS_FSOP_GEOM_FLAGS_RMAPBT (1 << 19) /* reverse mapping btree */
#define XFS_FSOP_GEOM_FLAGS_REFLINK (1 << 20) /* files can share blocks */
#define XFS_FSOP_GEOM_FLAGS_BIGTIME (1 << 21) /* 64-bit nsec timestamps */
#define XFS_FSOP_GEOM_FLAGS_INOBTCNT (1 << 22) /* inobt btree counter */
#define XFS_FSOP_GEOM_FLAGS_NREXT64 (1 << 23) /* large extent counters */
#define XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE (1 << 24) /* exchange range */
#define XFS_FSOP_GEOM_FLAGS_PARENT (1 << 25) /* linux parent pointers */
/*
* Minimum and maximum sizes need for growth checks.
*
* Block counts are in units of filesystem blocks, not basic blocks.
*/
#define XFS_MIN_AG_BLOCKS 64
#define XFS_MIN_LOG_BLOCKS 512ULL
#define XFS_MAX_LOG_BLOCKS (1024 * 1024ULL)
#define XFS_MIN_LOG_BYTES (10 * 1024 * 1024ULL)
/*
* Limits on sb_agblocks/sb_agblklog -- mkfs won't format AGs smaller than
* 16MB or larger than 1TB.
*/
#define XFS_MIN_AG_BYTES (1ULL << 24) /* 16 MB */
#define XFS_MAX_AG_BYTES (1ULL << 40) /* 1 TB */
#define XFS_MAX_AG_BLOCKS (XFS_MAX_AG_BYTES / XFS_MIN_BLOCKSIZE)
#define XFS_MAX_CRC_AG_BLOCKS (XFS_MAX_AG_BYTES / XFS_MIN_CRC_BLOCKSIZE)
#define XFS_MAX_AGNUMBER ((xfs_agnumber_t)(NULLAGNUMBER - 1))
/* keep the maximum size under 2^31 by a small amount */
#define XFS_MAX_LOG_BYTES \
((2 * 1024 * 1024 * 1024ULL) - XFS_MIN_LOG_BYTES)
/* Used for sanity checks on superblock */
#define XFS_MAX_DBLOCKS(s) ((xfs_rfsblock_t)(s)->sb_agcount * (s)->sb_agblocks)
#define XFS_MIN_DBLOCKS(s) ((xfs_rfsblock_t)((s)->sb_agcount - 1) * \
(s)->sb_agblocks + XFS_MIN_AG_BLOCKS)
/*
* Output for XFS_IOC_AG_GEOMETRY
*/
struct xfs_ag_geometry {
uint32_t ag_number; /* i/o: AG number */
uint32_t ag_length; /* o: length in blocks */
uint32_t ag_freeblks; /* o: free space */
uint32_t ag_icount; /* o: inodes allocated */
uint32_t ag_ifree; /* o: inodes free */
uint32_t ag_sick; /* o: sick things in ag */
uint32_t ag_checked; /* o: checked metadata in ag */
uint32_t ag_flags; /* i/o: flags for this ag */
uint64_t ag_reserved[12];/* o: zero */
};
#define XFS_AG_GEOM_SICK_SB (1 << 0) /* superblock */
#define XFS_AG_GEOM_SICK_AGF (1 << 1) /* AGF header */
#define XFS_AG_GEOM_SICK_AGFL (1 << 2) /* AGFL header */
#define XFS_AG_GEOM_SICK_AGI (1 << 3) /* AGI header */
#define XFS_AG_GEOM_SICK_BNOBT (1 << 4) /* free space by block */
#define XFS_AG_GEOM_SICK_CNTBT (1 << 5) /* free space by length */
#define XFS_AG_GEOM_SICK_INOBT (1 << 6) /* inode index */
#define XFS_AG_GEOM_SICK_FINOBT (1 << 7) /* free inode index */
#define XFS_AG_GEOM_SICK_RMAPBT (1 << 8) /* reverse mappings */
#define XFS_AG_GEOM_SICK_REFCNTBT (1 << 9) /* reference counts */
#define XFS_AG_GEOM_SICK_INODES (1 << 10) /* bad inodes were seen */
/*
* Structures for XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG & XFS_IOC_FSGROWFSRT
*/
typedef struct xfs_growfs_data {
__u64 newblocks; /* new data subvol size, fsblocks */
__u32 imaxpct; /* new inode space percentage limit */
} xfs_growfs_data_t;
typedef struct xfs_growfs_log {
__u32 newblocks; /* new log size, fsblocks */
__u32 isint; /* 1 if new log is internal */
} xfs_growfs_log_t;
typedef struct xfs_growfs_rt {
__u64 newblocks; /* new realtime size, fsblocks */
__u32 extsize; /* new realtime extent size, fsblocks */
} xfs_growfs_rt_t;
/*
* Structures returned from ioctl XFS_IOC_FSBULKSTAT & XFS_IOC_FSBULKSTAT_SINGLE
*/
typedef struct xfs_bstime {
__kernel_long_t tv_sec; /* seconds */
__s32 tv_nsec; /* and nanoseconds */
} xfs_bstime_t;
struct xfs_bstat {
__u64 bs_ino; /* inode number */
__u16 bs_mode; /* type and mode */
__u16 bs_nlink; /* number of links */
__u32 bs_uid; /* user id */
__u32 bs_gid; /* group id */
__u32 bs_rdev; /* device value */
__s32 bs_blksize; /* block size */
__s64 bs_size; /* file size */
xfs_bstime_t bs_atime; /* access time */
xfs_bstime_t bs_mtime; /* modify time */
xfs_bstime_t bs_ctime; /* inode change time */
int64_t bs_blocks; /* number of blocks */
__u32 bs_xflags; /* extended flags */
__s32 bs_extsize; /* extent size */
__s32 bs_extents; /* number of extents */
__u32 bs_gen; /* generation count */
__u16 bs_projid_lo; /* lower part of project id */
#define bs_projid bs_projid_lo /* (previously just bs_projid) */
__u16 bs_forkoff; /* inode fork offset in bytes */
__u16 bs_projid_hi; /* higher part of project id */
uint16_t bs_sick; /* sick inode metadata */
uint16_t bs_checked; /* checked inode metadata */
unsigned char bs_pad[2]; /* pad space, unused */
__u32 bs_cowextsize; /* cow extent size */
__u32 bs_dmevmask; /* DMIG event mask */
__u16 bs_dmstate; /* DMIG state info */
__u16 bs_aextents; /* attribute number of extents */
};
/* New bulkstat structure that reports v5 features and fixes padding issues */
struct xfs_bulkstat {
uint64_t bs_ino; /* inode number */
uint64_t bs_size; /* file size */
uint64_t bs_blocks; /* number of blocks */
uint64_t bs_xflags; /* extended flags */
int64_t bs_atime; /* access time, seconds */
int64_t bs_mtime; /* modify time, seconds */
int64_t bs_ctime; /* inode change time, seconds */
int64_t bs_btime; /* creation time, seconds */
uint32_t bs_gen; /* generation count */
uint32_t bs_uid; /* user id */
uint32_t bs_gid; /* group id */
uint32_t bs_projectid; /* project id */
uint32_t bs_atime_nsec; /* access time, nanoseconds */
uint32_t bs_mtime_nsec; /* modify time, nanoseconds */
uint32_t bs_ctime_nsec; /* inode change time, nanoseconds */
uint32_t bs_btime_nsec; /* creation time, nanoseconds */
uint32_t bs_blksize; /* block size */
uint32_t bs_rdev; /* device value */
uint32_t bs_cowextsize_blks; /* cow extent size hint, blocks */
uint32_t bs_extsize_blks; /* extent size hint, blocks */
uint32_t bs_nlink; /* number of links */
uint32_t bs_extents; /* 32-bit data fork extent counter */
uint32_t bs_aextents; /* attribute number of extents */
uint16_t bs_version; /* structure version */
uint16_t bs_forkoff; /* inode fork offset in bytes */
uint16_t bs_sick; /* sick inode metadata */
uint16_t bs_checked; /* checked inode metadata */
uint16_t bs_mode; /* type and mode */
uint16_t bs_pad2; /* zeroed */
uint64_t bs_extents64; /* 64-bit data fork extent counter */
uint64_t bs_pad[6]; /* zeroed */
};
#define XFS_BULKSTAT_VERSION_V1 (1)
#define XFS_BULKSTAT_VERSION_V5 (5)
/* bs_sick flags */
#define XFS_BS_SICK_INODE (1 << 0) /* inode core */
#define XFS_BS_SICK_BMBTD (1 << 1) /* data fork */
#define XFS_BS_SICK_BMBTA (1 << 2) /* attr fork */
#define XFS_BS_SICK_BMBTC (1 << 3) /* cow fork */
#define XFS_BS_SICK_DIR (1 << 4) /* directory */
#define XFS_BS_SICK_XATTR (1 << 5) /* extended attributes */
#define XFS_BS_SICK_SYMLINK (1 << 6) /* symbolic link remote target */
#define XFS_BS_SICK_PARENT (1 << 7) /* parent pointers */
#define XFS_BS_SICK_DIRTREE (1 << 8) /* directory tree structure */
/*
* Project quota id helpers (previously projid was 16bit only
* and using two 16bit values to hold new 32bit projid was chosen
* to retain compatibility with "old" filesystems).
*/
static inline uint32_t
bstat_get_projid(const struct xfs_bstat *bs)
{
return (uint32_t)bs->bs_projid_hi << 16 | bs->bs_projid_lo;
}
/*
* The user-level BulkStat Request interface structure.
*/
struct xfs_fsop_bulkreq {
__u64 __user *lastip; /* last inode # pointer */
__s32 icount; /* count of entries in buffer */
void __user *ubuffer;/* user buffer for inode desc. */
__s32 __user *ocount; /* output count pointer */
};
/*
* Structures returned from xfs_inumbers routine (XFS_IOC_FSINUMBERS).
*/
struct xfs_inogrp {
__u64 xi_startino; /* starting inode number */
__s32 xi_alloccount; /* # bits set in allocmask */
__u64 xi_allocmask; /* mask of allocated inodes */
};
/* New inumbers structure that reports v5 features and fixes padding issues */
struct xfs_inumbers {
uint64_t xi_startino; /* starting inode number */
uint64_t xi_allocmask; /* mask of allocated inodes */
uint8_t xi_alloccount; /* # bits set in allocmask */
uint8_t xi_version; /* version */
uint8_t xi_padding[6]; /* zero */
};
#define XFS_INUMBERS_VERSION_V1 (1)
#define XFS_INUMBERS_VERSION_V5 (5)
/* Header for bulk inode requests. */
struct xfs_bulk_ireq {
uint64_t ino; /* I/O: start with this inode */
uint32_t flags; /* I/O: operation flags */
uint32_t icount; /* I: count of entries in buffer */
uint32_t ocount; /* O: count of entries filled out */
uint32_t agno; /* I: see comment for IREQ_AGNO */
uint64_t reserved[5]; /* must be zero */
};
/*
* Only return results from the specified @agno. If @ino is zero, start
* with the first inode of @agno.
*/
#define XFS_BULK_IREQ_AGNO (1U << 0)
/*
* Return bulkstat information for a single inode, where @ino value is a
* special value, not a literal inode number. See the XFS_BULK_IREQ_SPECIAL_*
* values below. Not compatible with XFS_BULK_IREQ_AGNO.
*/
#define XFS_BULK_IREQ_SPECIAL (1U << 1)
/*
* Return data fork extent count via xfs_bulkstat->bs_extents64 field and assign
* 0 to xfs_bulkstat->bs_extents when the flag is set. Otherwise, use
* xfs_bulkstat->bs_extents for returning data fork extent count and set
* xfs_bulkstat->bs_extents64 to 0. In the second case, return -EOVERFLOW and
* assign 0 to xfs_bulkstat->bs_extents if data fork extent count is larger than
* XFS_MAX_EXTCNT_DATA_FORK_OLD.
*/
#define XFS_BULK_IREQ_NREXT64 (1U << 2)
#define XFS_BULK_IREQ_FLAGS_ALL (XFS_BULK_IREQ_AGNO | \
XFS_BULK_IREQ_SPECIAL | \
XFS_BULK_IREQ_NREXT64)
/* Operate on the root directory inode. */
#define XFS_BULK_IREQ_SPECIAL_ROOT (1)
/*
* ioctl structures for v5 bulkstat and inumbers requests
*/
struct xfs_bulkstat_req {
struct xfs_bulk_ireq hdr;
struct xfs_bulkstat bulkstat[];
};
#define XFS_BULKSTAT_REQ_SIZE(nr) (sizeof(struct xfs_bulkstat_req) + \
(nr) * sizeof(struct xfs_bulkstat))
struct xfs_inumbers_req {
struct xfs_bulk_ireq hdr;
struct xfs_inumbers inumbers[];
};
#define XFS_INUMBERS_REQ_SIZE(nr) (sizeof(struct xfs_inumbers_req) + \
(nr) * sizeof(struct xfs_inumbers))
/*
* Error injection.
*/
typedef struct xfs_error_injection {
__s32 fd;
__s32 errtag;
} xfs_error_injection_t;
/*
* Speculative preallocation trimming.
*/
#define XFS_EOFBLOCKS_VERSION 1
struct xfs_fs_eofblocks {
__u32 eof_version;
__u32 eof_flags;
uid_t eof_uid;
gid_t eof_gid;
prid_t eof_prid;
__u32 pad32;
__u64 eof_min_file_size;
__u64 pad64[12];
};
/* eof_flags values */
#define XFS_EOF_FLAGS_SYNC (1 << 0) /* sync/wait mode scan */
#define XFS_EOF_FLAGS_UID (1 << 1) /* filter by uid */
#define XFS_EOF_FLAGS_GID (1 << 2) /* filter by gid */
#define XFS_EOF_FLAGS_PRID (1 << 3) /* filter by project id */
#define XFS_EOF_FLAGS_MINFILESIZE (1 << 4) /* filter by min file size */
#define XFS_EOF_FLAGS_UNION (1 << 5) /* union filter algorithm;
* kernel only, not included in
* valid mask */
#define XFS_EOF_FLAGS_VALID \
(XFS_EOF_FLAGS_SYNC | \
XFS_EOF_FLAGS_UID | \
XFS_EOF_FLAGS_GID | \
XFS_EOF_FLAGS_PRID | \
XFS_EOF_FLAGS_MINFILESIZE)
/*
* The user-level Handle Request interface structure.
*/
typedef struct xfs_fsop_handlereq {
__u32 fd; /* fd for FD_TO_HANDLE */
void __user *path; /* user pathname */
__u32 oflags; /* open flags */
void __user *ihandle;/* user supplied handle */
__u32 ihandlen; /* user supplied length */
void __user *ohandle;/* user buffer for handle */
__u32 __user *ohandlen;/* user buffer length */
} xfs_fsop_handlereq_t;
/*
* Compound structures for passing args through Handle Request interfaces
* xfs_attrlist_by_handle, xfs_attrmulti_by_handle
* - ioctls: XFS_IOC_ATTRLIST_BY_HANDLE, and XFS_IOC_ATTRMULTI_BY_HANDLE
*/
/*
* Flags passed in xfs_attr_multiop.am_flags for the attr ioctl interface.
*
* NOTE: Must match the values declared in libattr without the XFS_IOC_ prefix.
*/
#define XFS_IOC_ATTR_ROOT 0x0002 /* use attrs in root namespace */
#define XFS_IOC_ATTR_SECURE 0x0008 /* use attrs in security namespace */
#define XFS_IOC_ATTR_CREATE 0x0010 /* fail if attr already exists */
#define XFS_IOC_ATTR_REPLACE 0x0020 /* fail if attr does not exist */
typedef struct xfs_attrlist_cursor {
__u32 opaque[4];
} xfs_attrlist_cursor_t;
/*
* Define how lists of attribute names are returned to userspace from the
* XFS_IOC_ATTRLIST_BY_HANDLE ioctl. struct xfs_attrlist is the header at the
* beginning of the returned buffer, and a each entry in al_offset contains the
* relative offset of an xfs_attrlist_ent containing the actual entry.
*
* NOTE: struct xfs_attrlist must match struct attrlist defined in libattr, and
* struct xfs_attrlist_ent must match struct attrlist_ent defined in libattr.
*/
struct xfs_attrlist {
__s32 al_count; /* number of entries in attrlist */
__s32 al_more; /* T/F: more attrs (do call again) */
__s32 al_offset[]; /* byte offsets of attrs [var-sized] */
};
struct xfs_attrlist_ent { /* data from attr_list() */
__u32 a_valuelen; /* number bytes in value of attr */
char a_name[]; /* attr name (NULL terminated) */
};
typedef struct xfs_fsop_attrlist_handlereq {
struct xfs_fsop_handlereq hreq; /* handle interface structure */
struct xfs_attrlist_cursor pos; /* opaque cookie, list offset */
__u32 flags; /* which namespace to use */
__u32 buflen; /* length of buffer supplied */
void __user *buffer; /* returned names */
} xfs_fsop_attrlist_handlereq_t;
typedef struct xfs_attr_multiop {
__u32 am_opcode;
#define ATTR_OP_GET 1 /* return the indicated attr's value */
#define ATTR_OP_SET 2 /* set/create the indicated attr/value pair */
#define ATTR_OP_REMOVE 3 /* remove the indicated attr */
__s32 am_error;
void __user *am_attrname;
void __user *am_attrvalue;
__u32 am_length;
__u32 am_flags; /* XFS_IOC_ATTR_* */
} xfs_attr_multiop_t;
typedef struct xfs_fsop_attrmulti_handlereq {
struct xfs_fsop_handlereq hreq; /* handle interface structure */
__u32 opcount;/* count of following multiop */
struct xfs_attr_multiop __user *ops; /* attr_multi data */
} xfs_fsop_attrmulti_handlereq_t;
/*
* per machine unique filesystem identifier types.
*/
typedef struct xfs_fsid {
__u32 val[2]; /* file system id type */
} xfs_fsid_t;
typedef struct xfs_fid {
__u16 fid_len; /* length of remainder */
__u16 fid_pad;
__u32 fid_gen; /* generation number */
__u64 fid_ino; /* 64 bits inode number */
} xfs_fid_t;
typedef struct xfs_handle {
union {
__s64 align; /* force alignment of ha_fid */
xfs_fsid_t _ha_fsid; /* unique file system identifier */
} ha_u;
xfs_fid_t ha_fid; /* file system specific file ID */
} xfs_handle_t;
#define ha_fsid ha_u._ha_fsid
/*
* Structure passed to XFS_IOC_SWAPEXT
*/
typedef struct xfs_swapext
{
int64_t sx_version; /* version */
#define XFS_SX_VERSION 0
int64_t sx_fdtarget; /* fd of target file */
int64_t sx_fdtmp; /* fd of tmp file */
xfs_off_t sx_offset; /* offset into file */
xfs_off_t sx_length; /* leng from offset */
char sx_pad[16]; /* pad space, unused */
struct xfs_bstat sx_stat; /* stat of target b4 copy */
} xfs_swapext_t;
/*
* Flags for going down operation
*/
#define XFS_FSOP_GOING_FLAGS_DEFAULT 0x0 /* going down */
#define XFS_FSOP_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
#define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
/* metadata scrubbing */
struct xfs_scrub_metadata {
__u32 sm_type; /* What to check? */
__u32 sm_flags; /* flags; see below. */
__u64 sm_ino; /* inode number. */
__u32 sm_gen; /* inode generation. */
__u32 sm_agno; /* ag number. */
__u64 sm_reserved[5]; /* pad to 64 bytes */
};
/*
* Metadata types and flags for scrub operation.
*/
/* Scrub subcommands. */
#define XFS_SCRUB_TYPE_PROBE 0 /* presence test ioctl */
#define XFS_SCRUB_TYPE_SB 1 /* superblock */
#define XFS_SCRUB_TYPE_AGF 2 /* AG free header */
#define XFS_SCRUB_TYPE_AGFL 3 /* AG free list */
#define XFS_SCRUB_TYPE_AGI 4 /* AG inode header */
#define XFS_SCRUB_TYPE_BNOBT 5 /* freesp by block btree */
#define XFS_SCRUB_TYPE_CNTBT 6 /* freesp by length btree */
#define XFS_SCRUB_TYPE_INOBT 7 /* inode btree */
#define XFS_SCRUB_TYPE_FINOBT 8 /* free inode btree */
#define XFS_SCRUB_TYPE_RMAPBT 9 /* reverse mapping btree */
#define XFS_SCRUB_TYPE_REFCNTBT 10 /* reference count btree */
#define XFS_SCRUB_TYPE_INODE 11 /* inode record */
#define XFS_SCRUB_TYPE_BMBTD 12 /* data fork block mapping */
#define XFS_SCRUB_TYPE_BMBTA 13 /* attr fork block mapping */
#define XFS_SCRUB_TYPE_BMBTC 14 /* CoW fork block mapping */
#define XFS_SCRUB_TYPE_DIR 15 /* directory */
#define XFS_SCRUB_TYPE_XATTR 16 /* extended attribute */
#define XFS_SCRUB_TYPE_SYMLINK 17 /* symbolic link */
#define XFS_SCRUB_TYPE_PARENT 18 /* parent pointers */
#define XFS_SCRUB_TYPE_RTBITMAP 19 /* realtime bitmap */
#define XFS_SCRUB_TYPE_RTSUM 20 /* realtime summary */
#define XFS_SCRUB_TYPE_UQUOTA 21 /* user quotas */
#define XFS_SCRUB_TYPE_GQUOTA 22 /* group quotas */
#define XFS_SCRUB_TYPE_PQUOTA 23 /* project quotas */
#define XFS_SCRUB_TYPE_FSCOUNTERS 24 /* fs summary counters */
#define XFS_SCRUB_TYPE_QUOTACHECK 25 /* quota counters */
#define XFS_SCRUB_TYPE_NLINKS 26 /* inode link counts */
#define XFS_SCRUB_TYPE_HEALTHY 27 /* everything checked out ok */
#define XFS_SCRUB_TYPE_DIRTREE 28 /* directory tree structure */
/* Number of scrub subcommands. */
#define XFS_SCRUB_TYPE_NR 29
/*
* This special type code only applies to the vectored scrub implementation.
*
* If any of the previous scrub vectors recorded runtime errors or have
* sv_flags bits set that match the OFLAG bits in the barrier vector's
* sv_flags, set the barrier's sv_ret to -ECANCELED and return to userspace.
*/
#define XFS_SCRUB_TYPE_BARRIER (0xFFFFFFFF)
/* i: Repair this metadata. */
#define XFS_SCRUB_IFLAG_REPAIR (1u << 0)
/* o: Metadata object needs repair. */
#define XFS_SCRUB_OFLAG_CORRUPT (1u << 1)
/*
* o: Metadata object could be optimized. It's not corrupt, but
* we could improve on it somehow.
*/
#define XFS_SCRUB_OFLAG_PREEN (1u << 2)
/* o: Cross-referencing failed. */
#define XFS_SCRUB_OFLAG_XFAIL (1u << 3)
/* o: Metadata object disagrees with cross-referenced metadata. */
#define XFS_SCRUB_OFLAG_XCORRUPT (1u << 4)
/* o: Scan was not complete. */
#define XFS_SCRUB_OFLAG_INCOMPLETE (1u << 5)
/* o: Metadata object looked funny but isn't corrupt. */
#define XFS_SCRUB_OFLAG_WARNING (1u << 6)
/*
* o: IFLAG_REPAIR was set but metadata object did not need fixing or
* optimization and has therefore not been altered.
*/
#define XFS_SCRUB_OFLAG_NO_REPAIR_NEEDED (1u << 7)
/* i: Rebuild the data structure. */
#define XFS_SCRUB_IFLAG_FORCE_REBUILD (1u << 8)
#define XFS_SCRUB_FLAGS_IN (XFS_SCRUB_IFLAG_REPAIR | \
XFS_SCRUB_IFLAG_FORCE_REBUILD)
#define XFS_SCRUB_FLAGS_OUT (XFS_SCRUB_OFLAG_CORRUPT | \
XFS_SCRUB_OFLAG_PREEN | \
XFS_SCRUB_OFLAG_XFAIL | \
XFS_SCRUB_OFLAG_XCORRUPT | \
XFS_SCRUB_OFLAG_INCOMPLETE | \
XFS_SCRUB_OFLAG_WARNING | \
XFS_SCRUB_OFLAG_NO_REPAIR_NEEDED)
#define XFS_SCRUB_FLAGS_ALL (XFS_SCRUB_FLAGS_IN | XFS_SCRUB_FLAGS_OUT)
/* Vectored scrub calls to reduce the number of kernel transitions. */
struct xfs_scrub_vec {
__u32 sv_type; /* XFS_SCRUB_TYPE_* */
__u32 sv_flags; /* XFS_SCRUB_FLAGS_* */
__s32 sv_ret; /* 0 or a negative error code */
__u32 sv_reserved; /* must be zero */
};
/* Vectored metadata scrub control structure. */
struct xfs_scrub_vec_head {
__u64 svh_ino; /* inode number. */
__u32 svh_gen; /* inode generation. */
__u32 svh_agno; /* ag number. */
__u32 svh_flags; /* XFS_SCRUB_VEC_FLAGS_* */
__u16 svh_rest_us; /* wait this much time between vector items */
__u16 svh_nr; /* number of svh_vectors */
__u64 svh_reserved; /* must be zero */
__u64 svh_vectors; /* pointer to buffer of xfs_scrub_vec */
};
#define XFS_SCRUB_VEC_FLAGS_ALL (0)
/*
* ioctl limits
*/
#ifdef XATTR_LIST_MAX
# define XFS_XATTR_LIST_MAX XATTR_LIST_MAX
#else
# define XFS_XATTR_LIST_MAX 65536
#endif
/*
* Exchange part of file1 with part of the file that this ioctl that is being
* called against (which we'll call file2). Filesystems must be able to
* restart and complete the operation even after the system goes down.
*/
struct xfs_exchange_range {
__s32 file1_fd;
__u32 pad; /* must be zeroes */
__u64 file1_offset; /* file1 offset, bytes */
__u64 file2_offset; /* file2 offset, bytes */
__u64 length; /* bytes to exchange */
__u64 flags; /* see XFS_EXCHANGE_RANGE_* below */
};
/*
* Using the same definition of file2 as struct xfs_exchange_range, commit the
* contents of file1 into file2 if file2 has the same inode number, mtime, and
* ctime as the arguments provided to the call. The old contents of file2 will
* be moved to file1.
*
* Returns -EBUSY if there isn't an exact match for the file2 fields.
*
* Filesystems must be able to restart and complete the operation even after
* the system goes down.
*/
struct xfs_commit_range {
__s32 file1_fd;
__u32 pad; /* must be zeroes */
__u64 file1_offset; /* file1 offset, bytes */
__u64 file2_offset; /* file2 offset, bytes */
__u64 length; /* bytes to exchange */
__u64 flags; /* see XFS_EXCHANGE_RANGE_* below */
/* opaque file2 metadata for freshness checks */
__u64 file2_freshness[6];
};
/*
* Exchange file data all the way to the ends of both files, and then exchange
* the file sizes. This flag can be used to replace a file's contents with a
* different amount of data. length will be ignored.
*/
#define XFS_EXCHANGE_RANGE_TO_EOF (1ULL << 0)
/* Flush all changes in file data and file metadata to disk before returning. */
#define XFS_EXCHANGE_RANGE_DSYNC (1ULL << 1)
/* Dry run; do all the parameter verification but do not change anything. */
#define XFS_EXCHANGE_RANGE_DRY_RUN (1ULL << 2)
/*
* Exchange only the parts of the two files where the file allocation units
* mapped to file1's range have been written to. This can accelerate
* scatter-gather atomic writes with a temp file if all writes are aligned to
* the file allocation unit.
*/
#define XFS_EXCHANGE_RANGE_FILE1_WRITTEN (1ULL << 3)
#define XFS_EXCHANGE_RANGE_ALL_FLAGS (XFS_EXCHANGE_RANGE_TO_EOF | \
XFS_EXCHANGE_RANGE_DSYNC | \
XFS_EXCHANGE_RANGE_DRY_RUN | \
XFS_EXCHANGE_RANGE_FILE1_WRITTEN)
/* Iterating parent pointers of files. */
/* target was the root directory */
#define XFS_GETPARENTS_OFLAG_ROOT (1U << 0)
/* Cursor is done iterating pptrs */
#define XFS_GETPARENTS_OFLAG_DONE (1U << 1)
#define XFS_GETPARENTS_OFLAGS_ALL (XFS_GETPARENTS_OFLAG_ROOT | \
XFS_GETPARENTS_OFLAG_DONE)
#define XFS_GETPARENTS_IFLAGS_ALL (0)
struct xfs_getparents_rec {
struct xfs_handle gpr_parent; /* Handle to parent */
__u32 gpr_reclen; /* Length of entire record */
__u32 gpr_reserved; /* zero */
char gpr_name[]; /* Null-terminated filename */
};
/* Iterate through this file's directory parent pointers */
struct xfs_getparents {
/*
* Structure to track progress in iterating the parent pointers.
* Must be initialized to zeroes before the first ioctl call, and
* not touched by callers after that.
*/
struct xfs_attrlist_cursor gp_cursor;
/* Input flags: XFS_GETPARENTS_IFLAG* */
__u16 gp_iflags;
/* Output flags: XFS_GETPARENTS_OFLAG* */
__u16 gp_oflags;
/* Size of the gp_buffer in bytes */
__u32 gp_bufsize;
/* Must be set to zero */
__u64 gp_reserved;
/* Pointer to a buffer in which to place xfs_getparents_rec */
__u64 gp_buffer;
};
static inline struct xfs_getparents_rec *
xfs_getparents_first_rec(struct xfs_getparents *gp)
{
return (struct xfs_getparents_rec *)(uintptr_t)gp->gp_buffer;
}
static inline struct xfs_getparents_rec *
xfs_getparents_next_rec(struct xfs_getparents *gp,
struct xfs_getparents_rec *gpr)
{
void *next = ((char *)gpr + gpr->gpr_reclen);
void *end = (void *)(uintptr_t)(gp->gp_buffer + gp->gp_bufsize);
if (next >= end)
return NULL;
return (struct xfs_getparents_rec *)next;
}
/* Iterate through this file handle's directory parent pointers. */
struct xfs_getparents_by_handle {
/* Handle to file whose parents we want. */
struct xfs_handle gph_handle;
struct xfs_getparents gph_request;
};
/*
* ioctl commands that are used by Linux filesystems
*/
#define XFS_IOC_GETXFLAGS FS_IOC_GETFLAGS
#define XFS_IOC_SETXFLAGS FS_IOC_SETFLAGS
#define XFS_IOC_GETVERSION FS_IOC_GETVERSION
/*
* ioctl commands that replace IRIX fcntl()'s
* For 'documentation' purposed more than anything else,
* the "cmd #" field reflects the IRIX fcntl number.
*/
/* XFS_IOC_ALLOCSP ------- deprecated 10 */
/* XFS_IOC_FREESP -------- deprecated 11 */
#define XFS_IOC_DIOINFO _IOR ('X', 30, struct dioattr)
#define XFS_IOC_FSGETXATTR FS_IOC_FSGETXATTR
#define XFS_IOC_FSSETXATTR FS_IOC_FSSETXATTR
/* XFS_IOC_ALLOCSP64 ----- deprecated 36 */
/* XFS_IOC_FREESP64 ------ deprecated 37 */
#define XFS_IOC_GETBMAP _IOWR('X', 38, struct getbmap)
/* XFS_IOC_FSSETDM ------- deprecated 39 */
#define XFS_IOC_RESVSP _IOW ('X', 40, struct xfs_flock64)
#define XFS_IOC_UNRESVSP _IOW ('X', 41, struct xfs_flock64)
#define XFS_IOC_RESVSP64 _IOW ('X', 42, struct xfs_flock64)
#define XFS_IOC_UNRESVSP64 _IOW ('X', 43, struct xfs_flock64)
#define XFS_IOC_GETBMAPA _IOWR('X', 44, struct getbmap)
#define XFS_IOC_FSGETXATTRA _IOR ('X', 45, struct fsxattr)
/* XFS_IOC_SETBIOSIZE ---- deprecated 46 */
/* XFS_IOC_GETBIOSIZE ---- deprecated 47 */
#define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap)
#define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64)
#define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_fs_eofblocks)
/* XFS_IOC_GETFSMAP ------ hoisted 59 */
#define XFS_IOC_SCRUB_METADATA _IOWR('X', 60, struct xfs_scrub_metadata)
#define XFS_IOC_AG_GEOMETRY _IOWR('X', 61, struct xfs_ag_geometry)
#define XFS_IOC_GETPARENTS _IOWR('X', 62, struct xfs_getparents)
#define XFS_IOC_GETPARENTS_BY_HANDLE _IOWR('X', 63, struct xfs_getparents_by_handle)
#define XFS_IOC_SCRUBV_METADATA _IOWR('X', 64, struct xfs_scrub_vec_head)
/*
* ioctl commands that replace IRIX syssgi()'s
*/
#define XFS_IOC_FSGEOMETRY_V1 _IOR ('X', 100, struct xfs_fsop_geom_v1)
#define XFS_IOC_FSBULKSTAT _IOWR('X', 101, struct xfs_fsop_bulkreq)
#define XFS_IOC_FSBULKSTAT_SINGLE _IOWR('X', 102, struct xfs_fsop_bulkreq)
#define XFS_IOC_FSINUMBERS _IOWR('X', 103, struct xfs_fsop_bulkreq)
#define XFS_IOC_PATH_TO_FSHANDLE _IOWR('X', 104, struct xfs_fsop_handlereq)
#define XFS_IOC_PATH_TO_HANDLE _IOWR('X', 105, struct xfs_fsop_handlereq)
#define XFS_IOC_FD_TO_HANDLE _IOWR('X', 106, struct xfs_fsop_handlereq)
#define XFS_IOC_OPEN_BY_HANDLE _IOWR('X', 107, struct xfs_fsop_handlereq)
#define XFS_IOC_READLINK_BY_HANDLE _IOWR('X', 108, struct xfs_fsop_handlereq)
#define XFS_IOC_SWAPEXT _IOWR('X', 109, struct xfs_swapext)
#define XFS_IOC_FSGROWFSDATA _IOW ('X', 110, struct xfs_growfs_data)
#define XFS_IOC_FSGROWFSLOG _IOW ('X', 111, struct xfs_growfs_log)
#define XFS_IOC_FSGROWFSRT _IOW ('X', 112, struct xfs_growfs_rt)
#define XFS_IOC_FSCOUNTS _IOR ('X', 113, struct xfs_fsop_counts)
#define XFS_IOC_SET_RESBLKS _IOWR('X', 114, struct xfs_fsop_resblks)
#define XFS_IOC_GET_RESBLKS _IOR ('X', 115, struct xfs_fsop_resblks)
#define XFS_IOC_ERROR_INJECTION _IOW ('X', 116, struct xfs_error_injection)
#define XFS_IOC_ERROR_CLEARALL _IOW ('X', 117, struct xfs_error_injection)
/* XFS_IOC_ATTRCTL_BY_HANDLE -- deprecated 118 */
#define XFS_IOC_FREEZE _IOWR('X', 119, int) /* aka FIFREEZE */
#define XFS_IOC_THAW _IOWR('X', 120, int) /* aka FITHAW */
/* XFS_IOC_FSSETDM_BY_HANDLE -- deprecated 121 */
#define XFS_IOC_ATTRLIST_BY_HANDLE _IOW ('X', 122, struct xfs_fsop_attrlist_handlereq)
#define XFS_IOC_ATTRMULTI_BY_HANDLE _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq)
#define XFS_IOC_FSGEOMETRY_V4 _IOR ('X', 124, struct xfs_fsop_geom_v4)
#define XFS_IOC_GOINGDOWN _IOR ('X', 125, uint32_t)
#define XFS_IOC_FSGEOMETRY _IOR ('X', 126, struct xfs_fsop_geom)
#define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req)
#define XFS_IOC_INUMBERS _IOR ('X', 128, struct xfs_inumbers_req)
#define XFS_IOC_EXCHANGE_RANGE _IOW ('X', 129, struct xfs_exchange_range)
#define XFS_IOC_START_COMMIT _IOR ('X', 130, struct xfs_commit_range)
#define XFS_IOC_COMMIT_RANGE _IOW ('X', 131, struct xfs_commit_range)
/* XFS_IOC_GETFSUUID ---------- deprecated 140 */
#ifndef HAVE_BBMACROS
/*
* Block I/O parameterization. A basic block (BB) is the lowest size of
* filesystem allocation, and must equal 512. Length units given to bio
* routines are in BB's.
*/
#define BBSHIFT 9
#define BBSIZE (1<<BBSHIFT)
#define BBMASK (BBSIZE-1)
#define BTOBB(bytes) (((__u64)(bytes) + BBSIZE - 1) >> BBSHIFT)
#define BTOBBT(bytes) ((__u64)(bytes) >> BBSHIFT)
#define BBTOB(bbs) ((bbs) << BBSHIFT)
#endif
#endif /* __XFS_FS_H__ */
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