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linux/fs/xfs/xfs_dinode.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

419 lines
16 KiB
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/*
* Copyright (c) 2000, 2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#ifndef __XFS_DINODE_H__
#define __XFS_DINODE_H__
struct xfs_buf;
struct xfs_mount;
#define XFS_DINODE_VERSION_1 1
#define XFS_DINODE_VERSION_2 2
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DINODE_GOOD_VERSION)
int xfs_dinode_good_version(int v);
#define XFS_DINODE_GOOD_VERSION(v) xfs_dinode_good_version(v)
#else
#define XFS_DINODE_GOOD_VERSION(v) (((v) == XFS_DINODE_VERSION_1) || \
((v) == XFS_DINODE_VERSION_2))
#endif
#define XFS_DINODE_MAGIC 0x494e /* 'IN' */
/*
* Disk inode structure.
* This is just the header; the inode is expanded to fill a variable size
* with the last field expanding. It is split into the core and "other"
* because we only need the core part in the in-core inode.
*/
typedef struct xfs_timestamp {
__int32_t t_sec; /* timestamp seconds */
__int32_t t_nsec; /* timestamp nanoseconds */
} xfs_timestamp_t;
/*
* Note: Coordinate changes to this structure with the XFS_DI_* #defines
* below and the offsets table in xfs_ialloc_log_di().
*/
typedef struct xfs_dinode_core
{
__uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
__uint16_t di_mode; /* mode and type of file */
__int8_t di_version; /* inode version */
__int8_t di_format; /* format of di_c data */
__uint16_t di_onlink; /* old number of links to file */
__uint32_t di_uid; /* owner's user id */
__uint32_t di_gid; /* owner's group id */
__uint32_t di_nlink; /* number of links to file */
__uint16_t di_projid; /* owner's project id */
__uint8_t di_pad[8]; /* unused, zeroed space */
__uint16_t di_flushiter; /* incremented on flush */
xfs_timestamp_t di_atime; /* time last accessed */
xfs_timestamp_t di_mtime; /* time last modified */
xfs_timestamp_t di_ctime; /* time created/inode modified */
xfs_fsize_t di_size; /* number of bytes in file */
xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
xfs_extnum_t di_nextents; /* number of extents in data fork */
xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
__uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
__int8_t di_aformat; /* format of attr fork's data */
__uint32_t di_dmevmask; /* DMIG event mask */
__uint16_t di_dmstate; /* DMIG state info */
__uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
__uint32_t di_gen; /* generation number */
} xfs_dinode_core_t;
#define DI_MAX_FLUSH 0xffff
typedef struct xfs_dinode
{
xfs_dinode_core_t di_core;
/*
* In adding anything between the core and the union, be
* sure to update the macros like XFS_LITINO below and
* XFS_BMAP_RBLOCK_DSIZE in xfs_bmap_btree.h.
*/
xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */
union {
xfs_bmdr_block_t di_bmbt; /* btree root block */
xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
xfs_dir_shortform_t di_dirsf; /* shortform directory */
xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
char di_c[1]; /* local contents */
xfs_dev_t di_dev; /* device for S_IFCHR/S_IFBLK */
uuid_t di_muuid; /* mount point value */
char di_symlink[1]; /* local symbolic link */
} di_u;
union {
xfs_bmdr_block_t di_abmbt; /* btree root block */
xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
} di_a;
} xfs_dinode_t;
/*
* The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
* Since the pathconf interface is signed, we use 2^31 - 1 instead.
* The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
*/
#define XFS_MAXLINK ((1U << 31) - 1U)
#define XFS_MAXLINK_1 65535U
/*
* Bit names for logging disk inodes only
*/
#define XFS_DI_MAGIC 0x0000001
#define XFS_DI_MODE 0x0000002
#define XFS_DI_VERSION 0x0000004
#define XFS_DI_FORMAT 0x0000008
#define XFS_DI_ONLINK 0x0000010
#define XFS_DI_UID 0x0000020
#define XFS_DI_GID 0x0000040
#define XFS_DI_NLINK 0x0000080
#define XFS_DI_PROJID 0x0000100
#define XFS_DI_PAD 0x0000200
#define XFS_DI_ATIME 0x0000400
#define XFS_DI_MTIME 0x0000800
#define XFS_DI_CTIME 0x0001000
#define XFS_DI_SIZE 0x0002000
#define XFS_DI_NBLOCKS 0x0004000
#define XFS_DI_EXTSIZE 0x0008000
#define XFS_DI_NEXTENTS 0x0010000
#define XFS_DI_NAEXTENTS 0x0020000
#define XFS_DI_FORKOFF 0x0040000
#define XFS_DI_AFORMAT 0x0080000
#define XFS_DI_DMEVMASK 0x0100000
#define XFS_DI_DMSTATE 0x0200000
#define XFS_DI_FLAGS 0x0400000
#define XFS_DI_GEN 0x0800000
#define XFS_DI_NEXT_UNLINKED 0x1000000
#define XFS_DI_U 0x2000000
#define XFS_DI_A 0x4000000
#define XFS_DI_NUM_BITS 27
#define XFS_DI_ALL_BITS ((1 << XFS_DI_NUM_BITS) - 1)
#define XFS_DI_CORE_BITS (XFS_DI_ALL_BITS & ~(XFS_DI_U|XFS_DI_A))
/*
* Values for di_format
*/
typedef enum xfs_dinode_fmt
{
XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
/* LNK: di_symlink */
XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
XFS_DINODE_FMT_UUID /* MNT: di_uuid */
} xfs_dinode_fmt_t;
/*
* Inode minimum and maximum sizes.
*/
#define XFS_DINODE_MIN_LOG 8
#define XFS_DINODE_MAX_LOG 11
#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
/*
* Inode size for given fs.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_LITINO)
int xfs_litino(struct xfs_mount *mp);
#define XFS_LITINO(mp) xfs_litino(mp)
#else
#define XFS_LITINO(mp) ((mp)->m_litino)
#endif
#define XFS_BROOT_SIZE_ADJ \
(sizeof(xfs_bmbt_block_t) - sizeof(xfs_bmdr_block_t))
/*
* Fork identifiers. Here so utilities can use them without including
* xfs_inode.h.
*/
#define XFS_DATA_FORK 0
#define XFS_ATTR_FORK 1
/*
* Inode data & attribute fork sizes, per inode.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_Q)
int xfs_cfork_q_disk(xfs_dinode_core_t *dcp);
int xfs_cfork_q(xfs_dinode_core_t *dcp);
#define XFS_CFORK_Q_DISK(dcp) xfs_cfork_q_disk(dcp)
#define XFS_CFORK_Q(dcp) xfs_cfork_q(dcp)
#else
#define XFS_CFORK_Q_DISK(dcp) ((dcp)->di_forkoff != 0)
#define XFS_CFORK_Q(dcp) ((dcp)->di_forkoff != 0)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_BOFF)
int xfs_cfork_boff_disk(xfs_dinode_core_t *dcp);
int xfs_cfork_boff(xfs_dinode_core_t *dcp);
#define XFS_CFORK_BOFF_DISK(dcp) xfs_cfork_boff_disk(dcp)
#define XFS_CFORK_BOFF(dcp) xfs_cfork_boff(dcp)
#else
#define XFS_CFORK_BOFF_DISK(dcp) ((int)(INT_GET((dcp)->di_forkoff, ARCH_CONVERT) << 3))
#define XFS_CFORK_BOFF(dcp) ((int)((dcp)->di_forkoff << 3))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_DSIZE)
int xfs_cfork_dsize_disk(xfs_dinode_core_t *dcp, struct xfs_mount *mp);
int xfs_cfork_dsize(xfs_dinode_core_t *dcp, struct xfs_mount *mp);
#define XFS_CFORK_DSIZE_DISK(dcp,mp) xfs_cfork_dsize_disk(dcp,mp)
#define XFS_CFORK_DSIZE(dcp,mp) xfs_cfork_dsize(dcp,mp)
#else
#define XFS_CFORK_DSIZE_DISK(dcp,mp) \
(XFS_CFORK_Q_DISK(dcp) ? XFS_CFORK_BOFF_DISK(dcp) : XFS_LITINO(mp))
#define XFS_CFORK_DSIZE(dcp,mp) \
(XFS_CFORK_Q(dcp) ? XFS_CFORK_BOFF(dcp) : XFS_LITINO(mp))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_ASIZE)
int xfs_cfork_asize_disk(xfs_dinode_core_t *dcp, struct xfs_mount *mp);
int xfs_cfork_asize(xfs_dinode_core_t *dcp, struct xfs_mount *mp);
#define XFS_CFORK_ASIZE_DISK(dcp,mp) xfs_cfork_asize_disk(dcp,mp)
#define XFS_CFORK_ASIZE(dcp,mp) xfs_cfork_asize(dcp,mp)
#else
#define XFS_CFORK_ASIZE_DISK(dcp,mp) \
(XFS_CFORK_Q_DISK(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF_DISK(dcp) : 0)
#define XFS_CFORK_ASIZE(dcp,mp) \
(XFS_CFORK_Q(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF(dcp) : 0)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_SIZE)
int xfs_cfork_size_disk(xfs_dinode_core_t *dcp, struct xfs_mount *mp, int w);
int xfs_cfork_size(xfs_dinode_core_t *dcp, struct xfs_mount *mp, int w);
#define XFS_CFORK_SIZE_DISK(dcp,mp,w) xfs_cfork_size_disk(dcp,mp,w)
#define XFS_CFORK_SIZE(dcp,mp,w) xfs_cfork_size(dcp,mp,w)
#else
#define XFS_CFORK_SIZE_DISK(dcp,mp,w) \
((w) == XFS_DATA_FORK ? \
XFS_CFORK_DSIZE_DISK(dcp, mp) : \
XFS_CFORK_ASIZE_DISK(dcp, mp))
#define XFS_CFORK_SIZE(dcp,mp,w) \
((w) == XFS_DATA_FORK ? \
XFS_CFORK_DSIZE(dcp, mp) : XFS_CFORK_ASIZE(dcp, mp))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_DSIZE)
int xfs_dfork_dsize(xfs_dinode_t *dip, struct xfs_mount *mp);
#define XFS_DFORK_DSIZE(dip,mp) xfs_dfork_dsize(dip,mp)
#else
#define XFS_DFORK_DSIZE(dip,mp) XFS_CFORK_DSIZE_DISK(&(dip)->di_core, mp)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_ASIZE)
int xfs_dfork_asize(xfs_dinode_t *dip, struct xfs_mount *mp);
#define XFS_DFORK_ASIZE(dip,mp) xfs_dfork_asize(dip,mp)
#else
#define XFS_DFORK_ASIZE(dip,mp) XFS_CFORK_ASIZE_DISK(&(dip)->di_core, mp)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_SIZE)
int xfs_dfork_size(xfs_dinode_t *dip, struct xfs_mount *mp, int w);
#define XFS_DFORK_SIZE(dip,mp,w) xfs_dfork_size(dip,mp,w)
#else
#define XFS_DFORK_SIZE(dip,mp,w) XFS_CFORK_SIZE_DISK(&(dip)->di_core, mp, w)
#endif
/*
* Macros for accessing per-fork disk inode information.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_Q)
int xfs_dfork_q(xfs_dinode_t *dip);
#define XFS_DFORK_Q(dip) xfs_dfork_q(dip)
#else
#define XFS_DFORK_Q(dip) XFS_CFORK_Q_DISK(&(dip)->di_core)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_BOFF)
int xfs_dfork_boff(xfs_dinode_t *dip);
#define XFS_DFORK_BOFF(dip) xfs_dfork_boff(dip)
#else
#define XFS_DFORK_BOFF(dip) XFS_CFORK_BOFF_DISK(&(dip)->di_core)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_DPTR)
char *xfs_dfork_dptr(xfs_dinode_t *dip);
#define XFS_DFORK_DPTR(dip) xfs_dfork_dptr(dip)
#else
#define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_APTR)
char *xfs_dfork_aptr(xfs_dinode_t *dip);
#define XFS_DFORK_APTR(dip) xfs_dfork_aptr(dip)
#else
#define XFS_DFORK_APTR(dip) ((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_PTR)
char *xfs_dfork_ptr(xfs_dinode_t *dip, int w);
#define XFS_DFORK_PTR(dip,w) xfs_dfork_ptr(dip,w)
#else
#define XFS_DFORK_PTR(dip,w) \
((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_FORMAT)
int xfs_cfork_format(xfs_dinode_core_t *dcp, int w);
#define XFS_CFORK_FORMAT(dcp,w) xfs_cfork_format(dcp,w)
#else
#define XFS_CFORK_FORMAT(dcp,w) \
((w) == XFS_DATA_FORK ? (dcp)->di_format : (dcp)->di_aformat)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_FMT_SET)
void xfs_cfork_fmt_set(xfs_dinode_core_t *dcp, int w, int n);
#define XFS_CFORK_FMT_SET(dcp,w,n) xfs_cfork_fmt_set(dcp,w,n)
#else
#define XFS_CFORK_FMT_SET(dcp,w,n) \
((w) == XFS_DATA_FORK ? \
((dcp)->di_format = (n)) : \
((dcp)->di_aformat = (n)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_NEXTENTS)
int xfs_cfork_nextents_disk(xfs_dinode_core_t *dcp, int w);
int xfs_cfork_nextents(xfs_dinode_core_t *dcp, int w);
#define XFS_CFORK_NEXTENTS_DISK(dcp,w) xfs_cfork_nextents_disk(dcp,w)
#define XFS_CFORK_NEXTENTS(dcp,w) xfs_cfork_nextents(dcp,w)
#else
#define XFS_CFORK_NEXTENTS_DISK(dcp,w) \
((w) == XFS_DATA_FORK ? \
INT_GET((dcp)->di_nextents, ARCH_CONVERT) : \
INT_GET((dcp)->di_anextents, ARCH_CONVERT))
#define XFS_CFORK_NEXTENTS(dcp,w) \
((w) == XFS_DATA_FORK ? (dcp)->di_nextents : (dcp)->di_anextents)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_CFORK_NEXT_SET)
void xfs_cfork_next_set(xfs_dinode_core_t *dcp, int w, int n);
#define XFS_CFORK_NEXT_SET(dcp,w,n) xfs_cfork_next_set(dcp,w,n)
#else
#define XFS_CFORK_NEXT_SET(dcp,w,n) \
((w) == XFS_DATA_FORK ? \
((dcp)->di_nextents = (n)) : \
((dcp)->di_anextents = (n)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DFORK_NEXTENTS)
int xfs_dfork_nextents(xfs_dinode_t *dip, int w);
#define XFS_DFORK_NEXTENTS(dip,w) xfs_dfork_nextents(dip,w)
#else
#define XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_DINODE)
xfs_dinode_t *xfs_buf_to_dinode(struct xfs_buf *bp);
#define XFS_BUF_TO_DINODE(bp) xfs_buf_to_dinode(bp)
#else
#define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)(XFS_BUF_PTR(bp)))
#endif
/*
* Values for di_flags
* There should be a one-to-one correspondence between these flags and the
* XFS_XFLAG_s.
*/
#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
#define XFS_DIFLAG_ANY \
(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS)
#endif /* __XFS_DINODE_H__ */
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