| /* |
| * 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; |
| |
| #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_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_OKREALFBITS \ |
| (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ |
| XFS_SB_VERSION2_ATTR2BIT) |
| #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; |
| |
| /* |
| * 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; |
| |
| /* 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_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; |
| |
| #ifdef __KERNEL__ |
| if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) |
| return 0; |
| #else |
| if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) && |
| sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) |
| return 0; |
| #endif |
| |
| 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; |
| } |
| |
| /* |
| * 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 *)XFS_BUF_PTR(bp)) |
| |
| #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) |
| #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1)) |
| |
| /* |
| * 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__ */ |