xfs: move most of xfs_sb.h to xfs_format.h

More on-disk format consolidation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 579 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 9b6e4247ca28..70ca740f34ac 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -34,6 +34,585 @@ struct xfs_buf;
 struct xfs_ifork;
 
 /*
+ * 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.
+ */
+#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_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
+
+/*
+ * Supported feature bit list is just all bits in the versionnum field because
+ * we've used them all up and understand them all. Except, of course, for the
+ * shared superblock bit, which nobody knows what it does and so is unsupported.
+ */
+#define XFS_SB_VERSION_OKBITS           \
+        ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \
+                ~XFS_SB_VERSION_SHAREDBIT)
+
+/*
+ * 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_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_OKBITS          \
+        (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
+         XFS_SB_VERSION2_ATTR2BIT       | \
+         XFS_SB_VERSION2_PROJID32BIT    | \
+         XFS_SB_VERSION2_FTYPE)
+
+/*
+ * 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_rfsblock_t  sb_dblocks;     /* number of data blocks */
+        xfs_rfsblock_t  sb_rblocks;     /* number of realtime blocks */
+        xfs_rtblock_t   sb_rextents;    /* number of realtime extents */
+        uuid_t          sb_uuid;        /* file system unique id */
+        xfs_fsblock_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)
+
+/*
+ * The first XFS version we support is a v4 superblock with V2 directories.
+ */
+static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp)
+{
+        if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
+                return false;
+
+        /* check for unknown features in the fs */
+        if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
+            ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
+             (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
+                return false;
+
+        return true;
+}
+
+static inline bool xfs_sb_good_version(struct xfs_sb *sbp)
+{
+        if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
+                return true;
+        if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
+                return xfs_sb_good_v4_features(sbp);
+        return false;
+}
+
+/*
+ * 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 bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp)
+{
+        return sbp->sb_bad_features2 != sbp->sb_features2;
+}
+
+static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp)
+{
+        return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT);
+}
+
+static inline void xfs_sb_version_addattr(struct xfs_sb *sbp)
+{
+        sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
+}
+
+static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp)
+{
+        return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
+}
+
+static inline void xfs_sb_version_addquota(struct xfs_sb *sbp)
+{
+        sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
+}
+
+static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp)
+{
+        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+                (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
+}
+
+static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp)
+{
+        return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
+}
+
+static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp)
+{
+        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+               (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
+}
+
+static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp)
+{
+        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+               (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
+}
+
+static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp)
+{
+        return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
+}
+
+static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp)
+{
+        return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
+}
+
+static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp)
+{
+        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+               (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
+}
+
+/*
+ * sb_features2 bit version macros.
+ */
+static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *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 bool xfs_sb_version_hasattr2(struct xfs_sb *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(struct xfs_sb *sbp)
+{
+        sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
+        sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
+        sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT;
+}
+
+static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp)
+{
+        sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
+        sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
+        if (!sbp->sb_features2)
+                sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
+}
+
+static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *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(struct xfs_sb *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_FINOBT   (1 << 0)         /* free inode btree */
+#define XFS_SB_FEAT_RO_COMPAT_ALL \
+                (XFS_SB_FEAT_RO_COMPAT_FINOBT)
+#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(struct xfs_sb *sbp)
+{
+        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
+}
+
+static inline int xfs_sb_version_has_pquotino(struct xfs_sb *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));
+}
+
+static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
+{
+        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) &&
+                (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT);
+}
+
+/*
+ * 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)
+
+/*
  * Allocation group header
  *
  * This is divided into three structures, placed in sequential 512-byte