Release 4.15 fs/xfs/libxfs/xfs_types.h
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_TYPES_H__
#define __XFS_TYPES_H__
typedef uint32_t prid_t;
/* project ID */
typedef uint32_t xfs_agblock_t;
/* blockno in alloc. group */
typedef uint32_t xfs_agino_t;
/* inode # within allocation grp */
typedef uint32_t xfs_extlen_t;
/* extent length in blocks */
typedef uint32_t xfs_agnumber_t;
/* allocation group number */
typedef int32_t xfs_extnum_t;
/* # of extents in a file */
typedef int16_t xfs_aextnum_t;
/* # extents in an attribute fork */
typedef int64_t xfs_fsize_t;
/* bytes in a file */
typedef uint64_t xfs_ufsize_t;
/* unsigned bytes in a file */
typedef int32_t xfs_suminfo_t;
/* type of bitmap summary info */
typedef int32_t xfs_rtword_t;
/* word type for bitmap manipulations */
typedef int64_t xfs_lsn_t;
/* log sequence number */
typedef int32_t xfs_tid_t;
/* transaction identifier */
typedef uint32_t xfs_dablk_t;
/* dir/attr block number (in file) */
typedef uint32_t xfs_dahash_t;
/* dir/attr hash value */
typedef uint64_t xfs_fsblock_t;
/* blockno in filesystem (agno|agbno) */
typedef uint64_t xfs_rfsblock_t;
/* blockno in filesystem (raw) */
typedef uint64_t xfs_rtblock_t;
/* extent (block) in realtime area */
typedef uint64_t xfs_fileoff_t;
/* block number in a file */
typedef uint64_t xfs_filblks_t;
/* number of blocks in a file */
typedef int64_t xfs_srtblock_t;
/* signed version of xfs_rtblock_t */
typedef int64_t xfs_sfiloff_t;
/* signed block number in a file */
/*
* New verifiers will return the instruction address of the failing check.
* NULL means everything is ok.
*/
typedef void * xfs_failaddr_t;
/*
* Null values for the types.
*/
#define NULLFSBLOCK ((xfs_fsblock_t)-1)
#define NULLRFSBLOCK ((xfs_rfsblock_t)-1)
#define NULLRTBLOCK ((xfs_rtblock_t)-1)
#define NULLFILEOFF ((xfs_fileoff_t)-1)
#define NULLAGBLOCK ((xfs_agblock_t)-1)
#define NULLAGNUMBER ((xfs_agnumber_t)-1)
#define NULLCOMMITLSN ((xfs_lsn_t)-1)
#define NULLFSINO ((xfs_ino_t)-1)
#define NULLAGINO ((xfs_agino_t)-1)
/*
* Max values for extlen, extnum, aextnum.
*/
#define MAXEXTLEN ((xfs_extlen_t)0x001fffff)
/* 21 bits */
#define MAXEXTNUM ((xfs_extnum_t)0x7fffffff)
/* signed int */
#define MAXAEXTNUM ((xfs_aextnum_t)0x7fff)
/* signed short */
/*
* Minimum and maximum blocksize and sectorsize.
* The blocksize upper limit is pretty much arbitrary.
* The sectorsize upper limit is due to sizeof(sb_sectsize).
* CRC enable filesystems use 512 byte inodes, meaning 512 byte block sizes
* cannot be used.
*/
#define XFS_MIN_BLOCKSIZE_LOG 9
/* i.e. 512 bytes */
#define XFS_MAX_BLOCKSIZE_LOG 16
/* i.e. 65536 bytes */
#define XFS_MIN_BLOCKSIZE (1 << XFS_MIN_BLOCKSIZE_LOG)
#define XFS_MAX_BLOCKSIZE (1 << XFS_MAX_BLOCKSIZE_LOG)
#define XFS_MIN_CRC_BLOCKSIZE (1 << (XFS_MIN_BLOCKSIZE_LOG + 1))
#define XFS_MIN_SECTORSIZE_LOG 9
/* i.e. 512 bytes */
#define XFS_MAX_SECTORSIZE_LOG 15
/* i.e. 32768 bytes */
#define XFS_MIN_SECTORSIZE (1 << XFS_MIN_SECTORSIZE_LOG)
#define XFS_MAX_SECTORSIZE (1 << XFS_MAX_SECTORSIZE_LOG)
/*
* Inode fork identifiers.
*/
#define XFS_DATA_FORK 0
#define XFS_ATTR_FORK 1
#define XFS_COW_FORK 2
/*
* Min numbers of data/attr fork btree root pointers.
*/
#define MINDBTPTRS 3
#define MINABTPTRS 2
/*
* MAXNAMELEN is the length (including the terminating null) of
* the longest permissible file (component) name.
*/
#define MAXNAMELEN 256
typedef enum {
XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
} xfs_lookup_t;
typedef enum {
XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_RMAPi, XFS_BTNUM_BMAPi,
XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_MAX
} xfs_btnum_t;
struct xfs_name {
const unsigned char *name;
int len;
int type;
};
/*
* uid_t and gid_t are hard-coded to 32 bits in the inode.
* Hence, an 'id' in a dquot is 32 bits..
*/
typedef uint32_t xfs_dqid_t;
/*
* Constants for bit manipulations.
*/
#define XFS_NBBYLOG 3
/* log2(NBBY) */
#define XFS_WORDLOG 2
/* log2(sizeof(xfs_rtword_t)) */
#define XFS_NBWORDLOG (XFS_NBBYLOG + XFS_WORDLOG)
#define XFS_NBWORD (1 << XFS_NBWORDLOG)
#define XFS_WORDMASK ((1 << XFS_WORDLOG) - 1)
struct xfs_iext_cursor {
struct xfs_iext_leaf *leaf;
int pos;
};
typedef enum {
XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
}
xfs_exntst_t;
typedef struct xfs_bmbt_irec
{
xfs_fileoff_t br_startoff; /* starting file offset */
xfs_fsblock_t br_startblock; /* starting block number */
xfs_filblks_t br_blockcount; /* number of blocks */
xfs_exntst_t br_state; /* extent state */
} xfs_bmbt_irec_t;
#endif /* __XFS_TYPES_H__ */
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