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linux/fs/xfs/xfs_sb.h
Eric Sandeen 533b81c875 xfs: Use defines for CRC offsets in all cases 
Some calls to crc functions used useful #defines,
others used awkward offsetof() constructs.

Switch them all to #define to make things a bit cleaner.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
2014-02-27 15:15:27 +11:00

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/*
* 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_SB_H__
#define __XFS_SB_H__
/*
* Super block
* Fits into a sector-sized buffer at address 0 of each allocation group.
* Only the first of these is ever updated except during growfs.
*/
struct xfs_buf;
struct xfs_mount;
struct xfs_trans;
#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
#define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */
#define XFS_SB_VERSION_NUMBITS 0x000f
#define XFS_SB_VERSION_ALLFBITS 0xfff0
#define XFS_SB_VERSION_SASHFBITS 0xf000
#define XFS_SB_VERSION_REALFBITS 0x0ff0
#define XFS_SB_VERSION_ATTRBIT 0x0010
#define XFS_SB_VERSION_NLINKBIT 0x0020
#define XFS_SB_VERSION_QUOTABIT 0x0040
#define XFS_SB_VERSION_ALIGNBIT 0x0080
#define XFS_SB_VERSION_DALIGNBIT 0x0100
#define XFS_SB_VERSION_SHAREDBIT 0x0200
#define XFS_SB_VERSION_LOGV2BIT 0x0400
#define XFS_SB_VERSION_SECTORBIT 0x0800
#define XFS_SB_VERSION_EXTFLGBIT 0x1000
#define XFS_SB_VERSION_DIRV2BIT 0x2000
#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
#define XFS_SB_VERSION_MOREBITSBIT 0x8000
#define XFS_SB_VERSION_OKSASHFBITS \
(XFS_SB_VERSION_EXTFLGBIT | \
XFS_SB_VERSION_DIRV2BIT | \
XFS_SB_VERSION_BORGBIT)
#define XFS_SB_VERSION_OKREALFBITS \
(XFS_SB_VERSION_ATTRBIT | \
XFS_SB_VERSION_NLINKBIT | \
XFS_SB_VERSION_QUOTABIT | \
XFS_SB_VERSION_ALIGNBIT | \
XFS_SB_VERSION_DALIGNBIT | \
XFS_SB_VERSION_SHAREDBIT | \
XFS_SB_VERSION_LOGV2BIT | \
XFS_SB_VERSION_SECTORBIT | \
XFS_SB_VERSION_MOREBITSBIT)
#define XFS_SB_VERSION_OKREALBITS \
(XFS_SB_VERSION_NUMBITS | \
XFS_SB_VERSION_OKREALFBITS | \
XFS_SB_VERSION_OKSASHFBITS)
/*
* There are two words to hold XFS "feature" bits: the original
* word, sb_versionnum, and sb_features2. Whenever a bit is set in
* sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
*
* These defines represent bits in sb_features2.
*/
#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
#define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
#define XFS_SB_VERSION2_OKREALFBITS \
(XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
XFS_SB_VERSION2_ATTR2BIT | \
XFS_SB_VERSION2_PROJID32BIT | \
XFS_SB_VERSION2_FTYPE)
#define XFS_SB_VERSION2_OKSASHFBITS \
(0)
#define XFS_SB_VERSION2_OKREALBITS \
(XFS_SB_VERSION2_OKREALFBITS | \
XFS_SB_VERSION2_OKSASHFBITS )
/*
* Superblock - in core version. Must match the ondisk version below.
* Must be padded to 64 bit alignment.
*/
typedef struct xfs_sb {
__uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
__uint32_t sb_blocksize; /* logical block size, bytes */
xfs_drfsbno_t sb_dblocks; /* number of data blocks */
xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
xfs_drtbno_t sb_rextents; /* number of realtime extents */
uuid_t sb_uuid; /* file system unique id */
xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
xfs_ino_t sb_rootino; /* root inode number */
xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
xfs_agblock_t sb_agblocks; /* size of an allocation group */
xfs_agnumber_t sb_agcount; /* number of allocation groups */
xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
xfs_extlen_t sb_logblocks; /* number of log blocks */
__uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
__uint16_t sb_sectsize; /* volume sector size, bytes */
__uint16_t sb_inodesize; /* inode size, bytes */
__uint16_t sb_inopblock; /* inodes per block */
char sb_fname[12]; /* file system name */
__uint8_t sb_blocklog; /* log2 of sb_blocksize */
__uint8_t sb_sectlog; /* log2 of sb_sectsize */
__uint8_t sb_inodelog; /* log2 of sb_inodesize */
__uint8_t sb_inopblog; /* log2 of sb_inopblock */
__uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
__uint8_t sb_rextslog; /* log2 of sb_rextents */
__uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
__uint8_t sb_imax_pct; /* max % of fs for inode space */
/* statistics */
/*
* These fields must remain contiguous. If you really
* want to change their layout, make sure you fix the
* code in xfs_trans_apply_sb_deltas().
*/
__uint64_t sb_icount; /* allocated inodes */
__uint64_t sb_ifree; /* free inodes */
__uint64_t sb_fdblocks; /* free data blocks */
__uint64_t sb_frextents; /* free realtime extents */
/*
* End contiguous fields.
*/
xfs_ino_t sb_uquotino; /* user quota inode */
xfs_ino_t sb_gquotino; /* group quota inode */
__uint16_t sb_qflags; /* quota flags */
__uint8_t sb_flags; /* misc. flags */
__uint8_t sb_shared_vn; /* shared version number */
xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
__uint32_t sb_unit; /* stripe or raid unit */
__uint32_t sb_width; /* stripe or raid width */
__uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
__uint8_t sb_logsectlog; /* log2 of the log sector size */
__uint16_t sb_logsectsize; /* sector size for the log, bytes */
__uint32_t sb_logsunit; /* stripe unit size for the log */
__uint32_t sb_features2; /* additional feature bits */
/*
* bad features2 field as a result of failing to pad the sb
* structure to 64 bits. Some machines will be using this field
* for features2 bits. Easiest just to mark it bad and not use
* it for anything else.
*/
__uint32_t sb_bad_features2;
/* version 5 superblock fields start here */
/* feature masks */
__uint32_t sb_features_compat;
__uint32_t sb_features_ro_compat;
__uint32_t sb_features_incompat;
__uint32_t sb_features_log_incompat;
__uint32_t sb_crc; /* superblock crc */
__uint32_t sb_pad;
xfs_ino_t sb_pquotino; /* project quota inode */
xfs_lsn_t sb_lsn; /* last write sequence */
/* must be padded to 64 bit alignment */
} xfs_sb_t;
#define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc)
/*
* Superblock - on disk version. Must match the in core version above.
* Must be padded to 64 bit alignment.
*/
typedef struct xfs_dsb {
__be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
__be32 sb_blocksize; /* logical block size, bytes */
__be64 sb_dblocks; /* number of data blocks */
__be64 sb_rblocks; /* number of realtime blocks */
__be64 sb_rextents; /* number of realtime extents */
uuid_t sb_uuid; /* file system unique id */
__be64 sb_logstart; /* starting block of log if internal */
__be64 sb_rootino; /* root inode number */
__be64 sb_rbmino; /* bitmap inode for realtime extents */
__be64 sb_rsumino; /* summary inode for rt bitmap */
__be32 sb_rextsize; /* realtime extent size, blocks */
__be32 sb_agblocks; /* size of an allocation group */
__be32 sb_agcount; /* number of allocation groups */
__be32 sb_rbmblocks; /* number of rt bitmap blocks */
__be32 sb_logblocks; /* number of log blocks */
__be16 sb_versionnum; /* header version == XFS_SB_VERSION */
__be16 sb_sectsize; /* volume sector size, bytes */
__be16 sb_inodesize; /* inode size, bytes */
__be16 sb_inopblock; /* inodes per block */
char sb_fname[12]; /* file system name */
__u8 sb_blocklog; /* log2 of sb_blocksize */
__u8 sb_sectlog; /* log2 of sb_sectsize */
__u8 sb_inodelog; /* log2 of sb_inodesize */
__u8 sb_inopblog; /* log2 of sb_inopblock */
__u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
__u8 sb_rextslog; /* log2 of sb_rextents */
__u8 sb_inprogress; /* mkfs is in progress, don't mount */
__u8 sb_imax_pct; /* max % of fs for inode space */
/* statistics */
/*
* These fields must remain contiguous. If you really
* want to change their layout, make sure you fix the
* code in xfs_trans_apply_sb_deltas().
*/
__be64 sb_icount; /* allocated inodes */
__be64 sb_ifree; /* free inodes */
__be64 sb_fdblocks; /* free data blocks */
__be64 sb_frextents; /* free realtime extents */
/*
* End contiguous fields.
*/
__be64 sb_uquotino; /* user quota inode */
__be64 sb_gquotino; /* group quota inode */
__be16 sb_qflags; /* quota flags */
__u8 sb_flags; /* misc. flags */
__u8 sb_shared_vn; /* shared version number */
__be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
__be32 sb_unit; /* stripe or raid unit */
__be32 sb_width; /* stripe or raid width */
__u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
__u8 sb_logsectlog; /* log2 of the log sector size */
__be16 sb_logsectsize; /* sector size for the log, bytes */
__be32 sb_logsunit; /* stripe unit size for the log */
__be32 sb_features2; /* additional feature bits */
/*
* bad features2 field as a result of failing to pad the sb
* structure to 64 bits. Some machines will be using this field
* for features2 bits. Easiest just to mark it bad and not use
* it for anything else.
*/
__be32 sb_bad_features2;
/* version 5 superblock fields start here */
/* feature masks */
__be32 sb_features_compat;
__be32 sb_features_ro_compat;
__be32 sb_features_incompat;
__be32 sb_features_log_incompat;
__le32 sb_crc; /* superblock crc */
__be32 sb_pad;
__be64 sb_pquotino; /* project quota inode */
__be64 sb_lsn; /* last write sequence */
/* must be padded to 64 bit alignment */
} xfs_dsb_t;
/*
* Sequence number values for the fields.
*/
typedef enum {
XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
XFS_SBS_PQUOTINO, XFS_SBS_LSN,
XFS_SBS_FIELDCOUNT
} xfs_sb_field_t;
/*
* Mask values, defined based on the xfs_sb_field_t values.
* Only define the ones we're using.
*/
#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
#define XFS_SB_UUID XFS_SB_MVAL(UUID)
#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
#define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
#define XFS_SB_CRC XFS_SB_MVAL(CRC)
#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
#define XFS_SB_MOD_BITS \
(XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
/*
* Misc. Flags - warning - these will be cleared by xfs_repair unless
* a feature bit is set when the flag is used.
*/
#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
/*
* define max. shared version we can interoperate with
*/
#define XFS_SB_MAX_SHARED_VN 0
#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
static inline int xfs_sb_good_version(xfs_sb_t *sbp)
{
/* We always support version 1-3 */
if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
sbp->sb_versionnum <= XFS_SB_VERSION_3)
return 1;
/* We support version 4 if all feature bits are supported */
if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
(sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
return 0;
if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
return 0;
return 1;
}
if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
return 1;
return 0;
}
/*
* Detect a mismatched features2 field. Older kernels read/wrote
* this into the wrong slot, so to be safe we keep them in sync.
*/
static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
{
return (sbp->sb_bad_features2 != sbp->sb_features2);
}
static inline unsigned xfs_sb_version_tonew(unsigned v)
{
if (v == XFS_SB_VERSION_1)
return XFS_SB_VERSION_4;
if (v == XFS_SB_VERSION_2)
return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
XFS_SB_VERSION_NLINKBIT;
}
static inline unsigned xfs_sb_version_toold(unsigned v)
{
if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
return 0;
if (v & XFS_SB_VERSION_NLINKBIT)
return XFS_SB_VERSION_3;
if (v & XFS_SB_VERSION_ATTRBIT)
return XFS_SB_VERSION_2;
return XFS_SB_VERSION_1;
}
static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
{
return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
sbp->sb_versionnum == XFS_SB_VERSION_3 ||
(XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
}
static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
{
if (sbp->sb_versionnum == XFS_SB_VERSION_1)
sbp->sb_versionnum = XFS_SB_VERSION_2;
else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
else
sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
}
static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
{
return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
(XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
}
static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
{
if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
sbp->sb_versionnum = XFS_SB_VERSION_3;
else
sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
}
static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
}
static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
{
if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
else
sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
XFS_SB_VERSION_QUOTABIT;
}
static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
}
static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
}
static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
}
static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT));
}
static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT));
}
static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
}
static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
}
static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
}
static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
(sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
}
/*
* sb_features2 bit version macros.
*
* For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
*
* SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
* ((xfs_sb_version_hasmorebits(sbp) &&
* ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
*/
static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
}
static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
}
static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
{
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
}
static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
{
sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
if (!sbp->sb_features2)
sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
}
static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
}
static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp)
{
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT;
}
/*
* Extended v5 superblock feature masks. These are to be used for new v5
* superblock features only.
*
* Compat features are new features that old kernels will not notice or affect
* and so can mount read-write without issues.
*
* RO-Compat (read only) are features that old kernels can read but will break
* if they write. Hence only read-only mounts of such filesystems are allowed on
* kernels that don't support the feature bit.
*
* InCompat features are features which old kernels will not understand and so
* must not mount.
*
* Log-InCompat features are for changes to log formats or new transactions that
* can't be replayed on older kernels. The fields are set when the filesystem is
* mounted, and a clean unmount clears the fields.
*/
#define XFS_SB_FEAT_COMPAT_ALL 0
#define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
static inline bool
xfs_sb_has_compat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_compat & feature) != 0;
}
#define XFS_SB_FEAT_RO_COMPAT_ALL 0
#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
static inline bool
xfs_sb_has_ro_compat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_ro_compat & feature) != 0;
}
#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
#define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE)
#define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
static inline bool
xfs_sb_has_incompat_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_incompat & feature) != 0;
}
#define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
#define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
static inline bool
xfs_sb_has_incompat_log_feature(
struct xfs_sb *sbp,
__uint32_t feature)
{
return (sbp->sb_features_log_incompat & feature) != 0;
}
/*
* V5 superblock specific feature checks
*/
static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
}
/*
* end of superblock version macros
*/
static inline bool
xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
{
return (ino == sbp->sb_uquotino ||
ino == sbp->sb_gquotino ||
ino == sbp->sb_pquotino);
}
#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
/*
* File system sector to basic block conversions.
*/
#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
/*
* File system block to basic block conversions.
*/
#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
#define XFS_BB_TO_FSB(mp,bb) \
(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
/*
* File system block to byte conversions.
*/
#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSB(mp,b) \
((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
/*
* perag get/put wrappers for ref counting
*/
extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
int tag);
extern void xfs_perag_put(struct xfs_perag *pag);
extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
extern void xfs_sb_calc_crc(struct xfs_buf *);
extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
#endif /* __XFS_SB_H__ */
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