5beda58bf2
Move the on-disk ACL format to xfs_format.h, so that repair can use the common defintion. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
667 lines
21 KiB
C
667 lines
21 KiB
C
/*
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* Copyright (c) 2000-2005 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_FORMAT_H__
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#define __XFS_FORMAT_H__
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/*
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* XFS On Disk Format Definitions
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*
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* This header file defines all the on-disk format definitions for
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* general XFS objects. Directory and attribute related objects are defined in
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* xfs_da_format.h, which log and log item formats are defined in
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* xfs_log_format.h. Everything else goes here.
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*/
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_inode;
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struct xfs_buf;
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struct xfs_ifork;
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typedef struct xfs_timestamp {
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__be32 t_sec; /* timestamp seconds */
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__be32 t_nsec; /* timestamp nanoseconds */
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} xfs_timestamp_t;
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/*
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* On-disk inode structure.
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*
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* This is just the header or "dinode core", the inode is expanded to fill a
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* variable size the leftover area split into a data and an attribute fork.
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* The format of the data and attribute fork depends on the format of the
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* inode as indicated by di_format and di_aformat. To access the data and
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* attribute use the XFS_DFORK_DPTR, XFS_DFORK_APTR, and XFS_DFORK_PTR macros
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* below.
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*
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* There is a very similar struct icdinode in xfs_inode which matches the
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* layout of the first 96 bytes of this structure, but is kept in native
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* format instead of big endian.
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*
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* Note: di_flushiter is only used by v1/2 inodes - it's effectively a zeroed
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* padding field for v3 inodes.
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*/
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#define XFS_DINODE_MAGIC 0x494e /* 'IN' */
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#define XFS_DINODE_GOOD_VERSION(v) ((v) >= 1 && (v) <= 3)
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typedef struct xfs_dinode {
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__be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */
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__be16 di_mode; /* mode and type of file */
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__u8 di_version; /* inode version */
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__u8 di_format; /* format of di_c data */
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__be16 di_onlink; /* old number of links to file */
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__be32 di_uid; /* owner's user id */
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__be32 di_gid; /* owner's group id */
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__be32 di_nlink; /* number of links to file */
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__be16 di_projid_lo; /* lower part of owner's project id */
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__be16 di_projid_hi; /* higher part owner's project id */
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__u8 di_pad[6]; /* unused, zeroed space */
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__be16 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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__be64 di_size; /* number of bytes in file */
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__be64 di_nblocks; /* # of direct & btree blocks used */
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__be32 di_extsize; /* basic/minimum extent size for file */
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__be32 di_nextents; /* number of extents in data fork */
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__be16 di_anextents; /* number of extents in attribute fork*/
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__u8 di_forkoff; /* attr fork offs, <<3 for 64b align */
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__s8 di_aformat; /* format of attr fork's data */
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__be32 di_dmevmask; /* DMIG event mask */
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__be16 di_dmstate; /* DMIG state info */
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__be16 di_flags; /* random flags, XFS_DIFLAG_... */
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__be32 di_gen; /* generation number */
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/* di_next_unlinked is the only non-core field in the old dinode */
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__be32 di_next_unlinked;/* agi unlinked list ptr */
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/* start of the extended dinode, writable fields */
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__le32 di_crc; /* CRC of the inode */
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__be64 di_changecount; /* number of attribute changes */
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__be64 di_lsn; /* flush sequence */
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__be64 di_flags2; /* more random flags */
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__u8 di_pad2[16]; /* more padding for future expansion */
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/* fields only written to during inode creation */
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xfs_timestamp_t di_crtime; /* time created */
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__be64 di_ino; /* inode number */
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uuid_t di_uuid; /* UUID of the filesystem */
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/* structure must be padded to 64 bit alignment */
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} xfs_dinode_t;
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#define XFS_DINODE_CRC_OFF offsetof(struct xfs_dinode, di_crc)
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#define DI_MAX_FLUSH 0xffff
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/*
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* Size of the core inode on disk. Version 1 and 2 inodes have
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* the same size, but version 3 has grown a few additional fields.
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*/
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static inline uint xfs_dinode_size(int version)
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{
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if (version == 3)
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return sizeof(struct xfs_dinode);
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return offsetof(struct xfs_dinode, di_crc);
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}
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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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* Values for di_format
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*/
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typedef enum xfs_dinode_fmt {
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XFS_DINODE_FMT_DEV, /* xfs_dev_t */
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XFS_DINODE_FMT_LOCAL, /* bulk data */
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XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */
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XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */
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XFS_DINODE_FMT_UUID /* uuid_t */
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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, version) \
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((int)(((mp)->m_sb.sb_inodesize) - xfs_dinode_size(version)))
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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_DFORK_Q(dip) ((dip)->di_forkoff != 0)
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#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_forkoff << 3))
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#define XFS_DFORK_DSIZE(dip,mp) \
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(XFS_DFORK_Q(dip) ? \
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XFS_DFORK_BOFF(dip) : \
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XFS_LITINO(mp, (dip)->di_version))
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#define XFS_DFORK_ASIZE(dip,mp) \
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(XFS_DFORK_Q(dip) ? \
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XFS_LITINO(mp, (dip)->di_version) - XFS_DFORK_BOFF(dip) : \
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0)
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#define XFS_DFORK_SIZE(dip,mp,w) \
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((w) == XFS_DATA_FORK ? \
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XFS_DFORK_DSIZE(dip, mp) : \
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XFS_DFORK_ASIZE(dip, mp))
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/*
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* Return pointers to the data or attribute forks.
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*/
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#define XFS_DFORK_DPTR(dip) \
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((char *)dip + xfs_dinode_size(dip->di_version))
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#define XFS_DFORK_APTR(dip) \
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(XFS_DFORK_DPTR(dip) + 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_DFORK_FORMAT(dip,w) \
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((w) == XFS_DATA_FORK ? \
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(dip)->di_format : \
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(dip)->di_aformat)
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#define XFS_DFORK_NEXTENTS(dip,w) \
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((w) == XFS_DATA_FORK ? \
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be32_to_cpu((dip)->di_nextents) : \
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be16_to_cpu((dip)->di_anextents))
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/*
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* For block and character special files the 32bit dev_t is stored at the
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* beginning of the data fork.
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*/
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static inline xfs_dev_t xfs_dinode_get_rdev(struct xfs_dinode *dip)
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{
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return be32_to_cpu(*(__be32 *)XFS_DFORK_DPTR(dip));
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}
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static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
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{
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*(__be32 *)XFS_DFORK_DPTR(dip) = cpu_to_be32(rdev);
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}
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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_FILESTREAM_BIT 14 /* use filestream allocator */
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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_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_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 | XFS_DIFLAG_FILESTREAM)
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/*
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* RealTime Device format definitions
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*/
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/* Min and max rt extent sizes, specified in bytes */
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#define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */
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#define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64kB */
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#define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4kB */
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#define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize)
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#define XFS_BLOCKMASK(mp) ((mp)->m_blockmask)
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#define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize)
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#define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask)
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/*
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* RT Summary and bit manipulation macros.
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*/
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#define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb)))
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#define XFS_SUMOFFSTOBLOCK(mp,s) \
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(((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog)
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#define XFS_SUMPTR(mp,bp,so) \
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((xfs_suminfo_t *)((bp)->b_addr + \
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(((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp))))
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#define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log)
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#define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log)
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#define XFS_BITTOWORD(mp,bi) \
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((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp)))
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#define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b))
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#define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b))
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#define XFS_RTLOBIT(w) xfs_lowbit32(w)
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#define XFS_RTHIBIT(w) xfs_highbit32(w)
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#define XFS_RTBLOCKLOG(b) xfs_highbit64(b)
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/*
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* Dquot and dquot block format definitions
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*/
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#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
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#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
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/*
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* This is the main portion of the on-disk representation of quota
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* information for a user. This is the q_core of the xfs_dquot_t that
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* is kept in kernel memory. We pad this with some more expansion room
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* to construct the on disk structure.
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*/
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typedef struct xfs_disk_dquot {
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__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
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__u8 d_version; /* dquot version */
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__u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */
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__be32 d_id; /* user,project,group id */
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__be64 d_blk_hardlimit;/* absolute limit on disk blks */
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__be64 d_blk_softlimit;/* preferred limit on disk blks */
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__be64 d_ino_hardlimit;/* maximum # allocated inodes */
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__be64 d_ino_softlimit;/* preferred inode limit */
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__be64 d_bcount; /* disk blocks owned by the user */
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__be64 d_icount; /* inodes owned by the user */
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__be32 d_itimer; /* zero if within inode limits if not,
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this is when we refuse service */
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__be32 d_btimer; /* similar to above; for disk blocks */
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__be16 d_iwarns; /* warnings issued wrt num inodes */
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__be16 d_bwarns; /* warnings issued wrt disk blocks */
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__be32 d_pad0; /* 64 bit align */
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__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */
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__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */
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__be64 d_rtbcount; /* realtime blocks owned */
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__be32 d_rtbtimer; /* similar to above; for RT disk blocks */
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__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */
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__be16 d_pad;
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} xfs_disk_dquot_t;
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/*
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* This is what goes on disk. This is separated from the xfs_disk_dquot because
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* carrying the unnecessary padding would be a waste of memory.
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*/
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typedef struct xfs_dqblk {
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xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */
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char dd_fill[4]; /* filling for posterity */
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/*
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* These two are only present on filesystems with the CRC bits set.
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*/
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__be32 dd_crc; /* checksum */
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__be64 dd_lsn; /* last modification in log */
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uuid_t dd_uuid; /* location information */
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} xfs_dqblk_t;
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#define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc)
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/*
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* Remote symlink format and access functions.
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*/
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#define XFS_SYMLINK_MAGIC 0x58534c4d /* XSLM */
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struct xfs_dsymlink_hdr {
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__be32 sl_magic;
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__be32 sl_offset;
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__be32 sl_bytes;
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__be32 sl_crc;
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uuid_t sl_uuid;
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__be64 sl_owner;
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__be64 sl_blkno;
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__be64 sl_lsn;
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};
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#define XFS_SYMLINK_CRC_OFF offsetof(struct xfs_dsymlink_hdr, sl_crc)
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/*
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* The maximum pathlen is 1024 bytes. Since the minimum file system
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* blocksize is 512 bytes, we can get a max of 3 extents back from
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* bmapi when crc headers are taken into account.
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*/
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#define XFS_SYMLINK_MAPS 3
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#define XFS_SYMLINK_BUF_SPACE(mp, bufsize) \
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((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \
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sizeof(struct xfs_dsymlink_hdr) : 0))
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/*
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* Allocation Btree format definitions
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*
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* There are two on-disk btrees, one sorted by blockno and one sorted
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* by blockcount and blockno. All blocks look the same to make the code
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* simpler; if we have time later, we'll make the optimizations.
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*/
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#define XFS_ABTB_MAGIC 0x41425442 /* 'ABTB' for bno tree */
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#define XFS_ABTB_CRC_MAGIC 0x41423342 /* 'AB3B' */
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#define XFS_ABTC_MAGIC 0x41425443 /* 'ABTC' for cnt tree */
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#define XFS_ABTC_CRC_MAGIC 0x41423343 /* 'AB3C' */
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/*
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* Data record/key structure
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*/
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typedef struct xfs_alloc_rec {
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__be32 ar_startblock; /* starting block number */
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__be32 ar_blockcount; /* count of free blocks */
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} xfs_alloc_rec_t, xfs_alloc_key_t;
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typedef struct xfs_alloc_rec_incore {
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xfs_agblock_t ar_startblock; /* starting block number */
|
|
xfs_extlen_t ar_blockcount; /* count of free blocks */
|
|
} xfs_alloc_rec_incore_t;
|
|
|
|
/* btree pointer type */
|
|
typedef __be32 xfs_alloc_ptr_t;
|
|
|
|
/*
|
|
* Block numbers in the AG:
|
|
* SB is sector 0, AGF is sector 1, AGI is sector 2, AGFL is sector 3.
|
|
*/
|
|
#define XFS_BNO_BLOCK(mp) ((xfs_agblock_t)(XFS_AGFL_BLOCK(mp) + 1))
|
|
#define XFS_CNT_BLOCK(mp) ((xfs_agblock_t)(XFS_BNO_BLOCK(mp) + 1))
|
|
|
|
|
|
/*
|
|
* Inode Allocation Btree format definitions
|
|
*
|
|
* There is a btree for the inode map per allocation group.
|
|
*/
|
|
#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */
|
|
#define XFS_IBT_CRC_MAGIC 0x49414233 /* 'IAB3' */
|
|
#define XFS_FIBT_MAGIC 0x46494254 /* 'FIBT' */
|
|
#define XFS_FIBT_CRC_MAGIC 0x46494233 /* 'FIB3' */
|
|
|
|
typedef __uint64_t xfs_inofree_t;
|
|
#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
|
|
#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
|
|
#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
|
|
#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
|
|
|
|
static inline xfs_inofree_t xfs_inobt_maskn(int i, int n)
|
|
{
|
|
return ((n >= XFS_INODES_PER_CHUNK ? 0 : XFS_INOBT_MASK(n)) - 1) << i;
|
|
}
|
|
|
|
/*
|
|
* Data record structure
|
|
*/
|
|
typedef struct xfs_inobt_rec {
|
|
__be32 ir_startino; /* starting inode number */
|
|
__be32 ir_freecount; /* count of free inodes (set bits) */
|
|
__be64 ir_free; /* free inode mask */
|
|
} xfs_inobt_rec_t;
|
|
|
|
typedef struct xfs_inobt_rec_incore {
|
|
xfs_agino_t ir_startino; /* starting inode number */
|
|
__int32_t ir_freecount; /* count of free inodes (set bits) */
|
|
xfs_inofree_t ir_free; /* free inode mask */
|
|
} xfs_inobt_rec_incore_t;
|
|
|
|
|
|
/*
|
|
* Key structure
|
|
*/
|
|
typedef struct xfs_inobt_key {
|
|
__be32 ir_startino; /* starting inode number */
|
|
} xfs_inobt_key_t;
|
|
|
|
/* btree pointer type */
|
|
typedef __be32 xfs_inobt_ptr_t;
|
|
|
|
/*
|
|
* block numbers in the AG.
|
|
*/
|
|
#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1))
|
|
#define XFS_FIBT_BLOCK(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1))
|
|
|
|
/*
|
|
* The first data block of an AG depends on whether the filesystem was formatted
|
|
* with the finobt feature. If so, account for the finobt reserved root btree
|
|
* block.
|
|
*/
|
|
#define XFS_PREALLOC_BLOCKS(mp) \
|
|
(xfs_sb_version_hasfinobt(&((mp)->m_sb)) ? \
|
|
XFS_FIBT_BLOCK(mp) + 1 : \
|
|
XFS_IBT_BLOCK(mp) + 1)
|
|
|
|
|
|
|
|
/*
|
|
* BMAP Btree format definitions
|
|
*
|
|
* This includes both the root block definition that sits inside an inode fork
|
|
* and the record/pointer formats for the leaf/node in the blocks.
|
|
*/
|
|
#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
|
|
#define XFS_BMAP_CRC_MAGIC 0x424d4133 /* 'BMA3' */
|
|
|
|
/*
|
|
* Bmap root header, on-disk form only.
|
|
*/
|
|
typedef struct xfs_bmdr_block {
|
|
__be16 bb_level; /* 0 is a leaf */
|
|
__be16 bb_numrecs; /* current # of data records */
|
|
} xfs_bmdr_block_t;
|
|
|
|
/*
|
|
* Bmap btree record and extent descriptor.
|
|
* l0:63 is an extent flag (value 1 indicates non-normal).
|
|
* l0:9-62 are startoff.
|
|
* l0:0-8 and l1:21-63 are startblock.
|
|
* l1:0-20 are blockcount.
|
|
*/
|
|
#define BMBT_EXNTFLAG_BITLEN 1
|
|
#define BMBT_STARTOFF_BITLEN 54
|
|
#define BMBT_STARTBLOCK_BITLEN 52
|
|
#define BMBT_BLOCKCOUNT_BITLEN 21
|
|
|
|
typedef struct xfs_bmbt_rec {
|
|
__be64 l0, l1;
|
|
} xfs_bmbt_rec_t;
|
|
|
|
typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
|
|
typedef xfs_bmbt_rec_t xfs_bmdr_rec_t;
|
|
|
|
typedef struct xfs_bmbt_rec_host {
|
|
__uint64_t l0, l1;
|
|
} xfs_bmbt_rec_host_t;
|
|
|
|
/*
|
|
* Values and macros for delayed-allocation startblock fields.
|
|
*/
|
|
#define STARTBLOCKVALBITS 17
|
|
#define STARTBLOCKMASKBITS (15 + 20)
|
|
#define STARTBLOCKMASK \
|
|
(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
|
|
|
|
static inline int isnullstartblock(xfs_fsblock_t x)
|
|
{
|
|
return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
|
|
}
|
|
|
|
static inline xfs_fsblock_t nullstartblock(int k)
|
|
{
|
|
ASSERT(k < (1 << STARTBLOCKVALBITS));
|
|
return STARTBLOCKMASK | (k);
|
|
}
|
|
|
|
static inline xfs_filblks_t startblockval(xfs_fsblock_t x)
|
|
{
|
|
return (xfs_filblks_t)((x) & ~STARTBLOCKMASK);
|
|
}
|
|
|
|
/*
|
|
* Possible extent formats.
|
|
*/
|
|
typedef enum {
|
|
XFS_EXTFMT_NOSTATE = 0,
|
|
XFS_EXTFMT_HASSTATE
|
|
} xfs_exntfmt_t;
|
|
|
|
/*
|
|
* Possible extent states.
|
|
*/
|
|
typedef enum {
|
|
XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
|
|
XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID
|
|
} xfs_exntst_t;
|
|
|
|
/*
|
|
* Incore version of above.
|
|
*/
|
|
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;
|
|
|
|
/*
|
|
* Key structure for non-leaf levels of the tree.
|
|
*/
|
|
typedef struct xfs_bmbt_key {
|
|
__be64 br_startoff; /* starting file offset */
|
|
} xfs_bmbt_key_t, xfs_bmdr_key_t;
|
|
|
|
/* btree pointer type */
|
|
typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
|
|
|
|
|
|
/*
|
|
* Generic Btree block format definitions
|
|
*
|
|
* This is a combination of the actual format used on disk for short and long
|
|
* format btrees. The first three fields are shared by both format, but the
|
|
* pointers are different and should be used with care.
|
|
*
|
|
* To get the size of the actual short or long form headers please use the size
|
|
* macros below. Never use sizeof(xfs_btree_block).
|
|
*
|
|
* The blkno, crc, lsn, owner and uuid fields are only available in filesystems
|
|
* with the crc feature bit, and all accesses to them must be conditional on
|
|
* that flag.
|
|
*/
|
|
struct xfs_btree_block {
|
|
__be32 bb_magic; /* magic number for block type */
|
|
__be16 bb_level; /* 0 is a leaf */
|
|
__be16 bb_numrecs; /* current # of data records */
|
|
union {
|
|
struct {
|
|
__be32 bb_leftsib;
|
|
__be32 bb_rightsib;
|
|
|
|
__be64 bb_blkno;
|
|
__be64 bb_lsn;
|
|
uuid_t bb_uuid;
|
|
__be32 bb_owner;
|
|
__le32 bb_crc;
|
|
} s; /* short form pointers */
|
|
struct {
|
|
__be64 bb_leftsib;
|
|
__be64 bb_rightsib;
|
|
|
|
__be64 bb_blkno;
|
|
__be64 bb_lsn;
|
|
uuid_t bb_uuid;
|
|
__be64 bb_owner;
|
|
__le32 bb_crc;
|
|
__be32 bb_pad; /* padding for alignment */
|
|
} l; /* long form pointers */
|
|
} bb_u; /* rest */
|
|
};
|
|
|
|
#define XFS_BTREE_SBLOCK_LEN 16 /* size of a short form block */
|
|
#define XFS_BTREE_LBLOCK_LEN 24 /* size of a long form block */
|
|
|
|
/* sizes of CRC enabled btree blocks */
|
|
#define XFS_BTREE_SBLOCK_CRC_LEN (XFS_BTREE_SBLOCK_LEN + 40)
|
|
#define XFS_BTREE_LBLOCK_CRC_LEN (XFS_BTREE_LBLOCK_LEN + 48)
|
|
|
|
#define XFS_BTREE_SBLOCK_CRC_OFF \
|
|
offsetof(struct xfs_btree_block, bb_u.s.bb_crc)
|
|
#define XFS_BTREE_LBLOCK_CRC_OFF \
|
|
offsetof(struct xfs_btree_block, bb_u.l.bb_crc)
|
|
|
|
/*
|
|
* On-disk XFS access control list structure.
|
|
*/
|
|
struct xfs_acl_entry {
|
|
__be32 ae_tag;
|
|
__be32 ae_id;
|
|
__be16 ae_perm;
|
|
__be16 ae_pad; /* fill the implicit hole in the structure */
|
|
};
|
|
|
|
struct xfs_acl {
|
|
__be32 acl_cnt;
|
|
struct xfs_acl_entry acl_entry[0];
|
|
};
|
|
|
|
/*
|
|
* The number of ACL entries allowed is defined by the on-disk format.
|
|
* For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is
|
|
* limited only by the maximum size of the xattr that stores the information.
|
|
*/
|
|
#define XFS_ACL_MAX_ENTRIES(mp) \
|
|
(xfs_sb_version_hascrc(&mp->m_sb) \
|
|
? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
|
|
sizeof(struct xfs_acl_entry) \
|
|
: 25)
|
|
|
|
#define XFS_ACL_MAX_SIZE(mp) \
|
|
(sizeof(struct xfs_acl) + \
|
|
sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
|
|
|
|
/* On-disk XFS extended attribute names */
|
|
#define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE"
|
|
#define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT"
|
|
#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
|
|
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
|
|
|
|
#endif /* __XFS_FORMAT_H__ */
|