283 строки
11 KiB
C
283 строки
11 KiB
C
/*
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* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_DINODE_H__
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#define __XFS_DINODE_H__
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struct xfs_buf;
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struct xfs_mount;
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#define XFS_DINODE_VERSION_1 1
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#define XFS_DINODE_VERSION_2 2
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#define XFS_DINODE_GOOD_VERSION(v) \
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(((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2))
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#define XFS_DINODE_MAGIC 0x494e /* 'IN' */
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/*
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* Disk inode structure.
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* This is just the header; the inode is expanded to fill a variable size
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* with the last field expanding. It is split into the core and "other"
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* because we only need the core part in the in-core inode.
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*/
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typedef struct xfs_timestamp {
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__int32_t t_sec; /* timestamp seconds */
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__int32_t t_nsec; /* timestamp nanoseconds */
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} xfs_timestamp_t;
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/*
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* Note: Coordinate changes to this structure with the XFS_DI_* #defines
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* below and the offsets table in xfs_ialloc_log_di().
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*/
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typedef struct xfs_dinode_core
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{
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__uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
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__uint16_t di_mode; /* mode and type of file */
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__int8_t di_version; /* inode version */
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__int8_t di_format; /* format of di_c data */
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__uint16_t di_onlink; /* old number of links to file */
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__uint32_t di_uid; /* owner's user id */
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__uint32_t di_gid; /* owner's group id */
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__uint32_t di_nlink; /* number of links to file */
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__uint16_t di_projid; /* owner's project id */
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__uint8_t di_pad[8]; /* unused, zeroed space */
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__uint16_t di_flushiter; /* incremented on flush */
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xfs_timestamp_t di_atime; /* time last accessed */
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xfs_timestamp_t di_mtime; /* time last modified */
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xfs_timestamp_t di_ctime; /* time created/inode modified */
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xfs_fsize_t di_size; /* number of bytes in file */
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xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
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xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
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xfs_extnum_t di_nextents; /* number of extents in data fork */
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xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
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__uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
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__int8_t di_aformat; /* format of attr fork's data */
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__uint32_t di_dmevmask; /* DMIG event mask */
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__uint16_t di_dmstate; /* DMIG state info */
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__uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
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__uint32_t di_gen; /* generation number */
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} xfs_dinode_core_t;
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#define DI_MAX_FLUSH 0xffff
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typedef struct xfs_dinode
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{
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xfs_dinode_core_t di_core;
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/*
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* In adding anything between the core and the union, be
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* sure to update the macros like XFS_LITINO below and
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* XFS_BMAP_RBLOCK_DSIZE in xfs_bmap_btree.h.
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*/
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xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */
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union {
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xfs_bmdr_block_t di_bmbt; /* btree root block */
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xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
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xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
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char di_c[1]; /* local contents */
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xfs_dev_t di_dev; /* device for S_IFCHR/S_IFBLK */
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uuid_t di_muuid; /* mount point value */
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char di_symlink[1]; /* local symbolic link */
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} di_u;
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union {
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xfs_bmdr_block_t di_abmbt; /* btree root block */
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xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
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xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
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} di_a;
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} xfs_dinode_t;
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/*
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* The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
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* Since the pathconf interface is signed, we use 2^31 - 1 instead.
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* The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
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*/
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#define XFS_MAXLINK ((1U << 31) - 1U)
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#define XFS_MAXLINK_1 65535U
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/*
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* Bit names for logging disk inodes only
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*/
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#define XFS_DI_MAGIC 0x0000001
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#define XFS_DI_MODE 0x0000002
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#define XFS_DI_VERSION 0x0000004
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#define XFS_DI_FORMAT 0x0000008
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#define XFS_DI_ONLINK 0x0000010
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#define XFS_DI_UID 0x0000020
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#define XFS_DI_GID 0x0000040
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#define XFS_DI_NLINK 0x0000080
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#define XFS_DI_PROJID 0x0000100
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#define XFS_DI_PAD 0x0000200
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#define XFS_DI_ATIME 0x0000400
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#define XFS_DI_MTIME 0x0000800
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#define XFS_DI_CTIME 0x0001000
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#define XFS_DI_SIZE 0x0002000
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#define XFS_DI_NBLOCKS 0x0004000
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#define XFS_DI_EXTSIZE 0x0008000
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#define XFS_DI_NEXTENTS 0x0010000
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#define XFS_DI_NAEXTENTS 0x0020000
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#define XFS_DI_FORKOFF 0x0040000
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#define XFS_DI_AFORMAT 0x0080000
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#define XFS_DI_DMEVMASK 0x0100000
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#define XFS_DI_DMSTATE 0x0200000
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#define XFS_DI_FLAGS 0x0400000
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#define XFS_DI_GEN 0x0800000
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#define XFS_DI_NEXT_UNLINKED 0x1000000
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#define XFS_DI_U 0x2000000
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#define XFS_DI_A 0x4000000
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#define XFS_DI_NUM_BITS 27
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#define XFS_DI_ALL_BITS ((1 << XFS_DI_NUM_BITS) - 1)
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#define XFS_DI_CORE_BITS (XFS_DI_ALL_BITS & ~(XFS_DI_U|XFS_DI_A))
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/*
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* Values for di_format
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*/
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typedef enum xfs_dinode_fmt
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{
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XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
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XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
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/* LNK: di_symlink */
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XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
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XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
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XFS_DINODE_FMT_UUID /* MNT: di_uuid */
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} xfs_dinode_fmt_t;
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/*
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* Inode minimum and maximum sizes.
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*/
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#define XFS_DINODE_MIN_LOG 8
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#define XFS_DINODE_MAX_LOG 11
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#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
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#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
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/*
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* Inode size for given fs.
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*/
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#define XFS_LITINO(mp) ((mp)->m_litino)
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#define XFS_BROOT_SIZE_ADJ \
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(sizeof(xfs_bmbt_block_t) - sizeof(xfs_bmdr_block_t))
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/*
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* Inode data & attribute fork sizes, per inode.
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*/
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#define XFS_CFORK_Q(dcp) ((dcp)->di_forkoff != 0)
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#define XFS_CFORK_Q_DISK(dcp) ((dcp)->di_forkoff != 0)
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#define XFS_CFORK_BOFF(dcp) ((int)((dcp)->di_forkoff << 3))
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#define XFS_CFORK_BOFF_DISK(dcp) \
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((int)(INT_GET((dcp)->di_forkoff, ARCH_CONVERT) << 3))
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#define XFS_CFORK_DSIZE_DISK(dcp,mp) \
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(XFS_CFORK_Q_DISK(dcp) ? XFS_CFORK_BOFF_DISK(dcp) : XFS_LITINO(mp))
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#define XFS_CFORK_DSIZE(dcp,mp) \
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(XFS_CFORK_Q(dcp) ? XFS_CFORK_BOFF(dcp) : XFS_LITINO(mp))
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#define XFS_CFORK_ASIZE_DISK(dcp,mp) \
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(XFS_CFORK_Q_DISK(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF_DISK(dcp) : 0)
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#define XFS_CFORK_ASIZE(dcp,mp) \
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(XFS_CFORK_Q(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF(dcp) : 0)
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#define XFS_CFORK_SIZE_DISK(dcp,mp,w) \
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((w) == XFS_DATA_FORK ? \
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XFS_CFORK_DSIZE_DISK(dcp, mp) : \
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XFS_CFORK_ASIZE_DISK(dcp, mp))
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#define XFS_CFORK_SIZE(dcp,mp,w) \
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((w) == XFS_DATA_FORK ? \
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XFS_CFORK_DSIZE(dcp, mp) : XFS_CFORK_ASIZE(dcp, mp))
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#define XFS_DFORK_DSIZE(dip,mp) \
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XFS_CFORK_DSIZE_DISK(&(dip)->di_core, mp)
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#define XFS_DFORK_DSIZE_HOST(dip,mp) \
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XFS_CFORK_DSIZE(&(dip)->di_core, mp)
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#define XFS_DFORK_ASIZE(dip,mp) \
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XFS_CFORK_ASIZE_DISK(&(dip)->di_core, mp)
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#define XFS_DFORK_ASIZE_HOST(dip,mp) \
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XFS_CFORK_ASIZE(&(dip)->di_core, mp)
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#define XFS_DFORK_SIZE(dip,mp,w) \
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XFS_CFORK_SIZE_DISK(&(dip)->di_core, mp, w)
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#define XFS_DFORK_SIZE_HOST(dip,mp,w) \
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XFS_CFORK_SIZE(&(dip)->di_core, mp, w)
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#define XFS_DFORK_Q(dip) XFS_CFORK_Q_DISK(&(dip)->di_core)
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#define XFS_DFORK_BOFF(dip) XFS_CFORK_BOFF_DISK(&(dip)->di_core)
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#define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
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#define XFS_DFORK_APTR(dip) \
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((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
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#define XFS_DFORK_PTR(dip,w) \
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((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
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#define XFS_CFORK_FORMAT(dcp,w) \
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((w) == XFS_DATA_FORK ? (dcp)->di_format : (dcp)->di_aformat)
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#define XFS_CFORK_FMT_SET(dcp,w,n) \
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((w) == XFS_DATA_FORK ? \
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((dcp)->di_format = (n)) : ((dcp)->di_aformat = (n)))
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#define XFS_DFORK_FORMAT(dip,w) XFS_CFORK_FORMAT(&(dip)->di_core, w)
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#define XFS_CFORK_NEXTENTS_DISK(dcp,w) \
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((w) == XFS_DATA_FORK ? \
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INT_GET((dcp)->di_nextents, ARCH_CONVERT) : \
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INT_GET((dcp)->di_anextents, ARCH_CONVERT))
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#define XFS_CFORK_NEXTENTS(dcp,w) \
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((w) == XFS_DATA_FORK ? (dcp)->di_nextents : (dcp)->di_anextents)
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#define XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
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#define XFS_DFORK_NEXTENTS_HOST(dip,w) XFS_CFORK_NEXTENTS(&(dip)->di_core, w)
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#define XFS_CFORK_NEXT_SET(dcp,w,n) \
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((w) == XFS_DATA_FORK ? \
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((dcp)->di_nextents = (n)) : ((dcp)->di_anextents = (n)))
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#define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp))
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/*
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* Values for di_flags
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* There should be a one-to-one correspondence between these flags and the
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* XFS_XFLAG_s.
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*/
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#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
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#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
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#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
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#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
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#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
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#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
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#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
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#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
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#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
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#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
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#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
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#define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */
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#define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */
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#define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */
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#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
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#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
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#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
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#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
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#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
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#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
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#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
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#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
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#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
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#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
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#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
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#define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT)
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#define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
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#define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT)
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#define XFS_DIFLAG_ANY \
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(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
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XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
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XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
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XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
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XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG)
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#endif /* __XFS_DINODE_H__ */
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