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-rw-r--r--fs/xfs/libxfs/xfs_sb.h584
1 files changed, 0 insertions, 584 deletions
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index 2e739708afd3..8eb1c54bafbf 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -19,590 +19,6 @@
#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_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)
-
-/*
* perag get/put wrappers for ref counting
*/
extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);