diff options
Diffstat (limited to 'extlinux/xfs_sb.h')
| -rw-r--r-- | extlinux/xfs_sb.h | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/extlinux/xfs_sb.h b/extlinux/xfs_sb.h new file mode 100644 index 00000000..8f72d6ad --- /dev/null +++ b/extlinux/xfs_sb.h @@ -0,0 +1,476 @@ +/* + * Taken from Linux kernel tree (linux/fs/xfs) + * + * Copyright (c) 2000-2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * 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__ + +#include <stddef.h> + +#include <sys/types.h> +#include <uuid/uuid.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; + +#define XFS_SB_MAGIC "XFSB" /* '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_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_OKREALFBITS \ + (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ + XFS_SB_VERSION2_ATTR2BIT | \ + XFS_SB_VERSION2_PROJID32BIT) +#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; + + /* must be padded to 64 bit alignment */ +} xfs_sb_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_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_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) + + +/* + * 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_versionnum & XFS_SB_VERSION_SHAREDBIT) && + sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) + return 0; + + 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_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_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_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_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_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_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT); +} + +static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) +{ + return 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_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT); +} + +/* + * end of superblock version macros + */ + +#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) + +#endif /* XFS_SB_H_ */ |