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xfs: add a incompat feature bit for parent pointers

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Create an incompat feature bit and a fs geometry flag so that we can
enable the feature in the ondisk superblock and advertise its existence
to userspace.

Signed-off-by: Mark Tinguely <mark.tinguely@oracle.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Allison Henderson 2024-04-22 09:47:57 -07:00 • committed by Darrick J. Wong
parent 7dafb449b7
commit 5f98ec1cb5
4 changed files with 10 additions and 0 deletions
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1
fs/xfs/libxfs/xfs_format.h
View file

@ -374,6 +374,7 @@ xfs_sb_has_ro_compat_feature(
#define XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR (1 << 4) /* needs xfs_repair */ #define XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR (1 << 4) /* needs xfs_repair */
#define XFS_SB_FEAT_INCOMPAT_NREXT64 (1 << 5) /* large extent counters */ #define XFS_SB_FEAT_INCOMPAT_NREXT64 (1 << 5) /* large extent counters */
#define XFS_SB_FEAT_INCOMPAT_EXCHRANGE (1 << 6) /* exchangerange supported */ #define XFS_SB_FEAT_INCOMPAT_EXCHRANGE (1 << 6) /* exchangerange supported */
#define XFS_SB_FEAT_INCOMPAT_PARENT (1 << 7) /* parent pointers */
#define XFS_SB_FEAT_INCOMPAT_ALL \ #define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE | \ (XFS_SB_FEAT_INCOMPAT_FTYPE | \
XFS_SB_FEAT_INCOMPAT_SPINODES | \ XFS_SB_FEAT_INCOMPAT_SPINODES | \

1
fs/xfs/libxfs/xfs_fs.h
View file

@ -240,6 +240,7 @@ typedef struct xfs_fsop_resblks {
#define XFS_FSOP_GEOM_FLAGS_INOBTCNT (1 << 22) /* inobt btree counter */ #define XFS_FSOP_GEOM_FLAGS_INOBTCNT (1 << 22) /* inobt btree counter */
#define XFS_FSOP_GEOM_FLAGS_NREXT64 (1 << 23) /* large extent counters */ #define XFS_FSOP_GEOM_FLAGS_NREXT64 (1 << 23) /* large extent counters */
#define XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE (1 << 24) /* exchange range */ #define XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE (1 << 24) /* exchange range */
#define XFS_FSOP_GEOM_FLAGS_PARENT (1 << 25) /* linux parent pointers */
/* /*
* Minimum and maximum sizes need for growth checks. * Minimum and maximum sizes need for growth checks.

4
fs/xfs/libxfs/xfs_sb.c
View file

@ -178,6 +178,8 @@ xfs_sb_version_to_features(
features |= XFS_FEAT_NREXT64; features |= XFS_FEAT_NREXT64;
if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE) if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)
features |= XFS_FEAT_EXCHANGE_RANGE; features |= XFS_FEAT_EXCHANGE_RANGE;
if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_PARENT)
features |= XFS_FEAT_PARENT;
return features; return features;
} }
@ -1254,6 +1256,8 @@ xfs_fs_geometry(
geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
if (xfs_has_inobtcounts(mp)) if (xfs_has_inobtcounts(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT;
if (xfs_has_parent(mp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT;
if (xfs_has_sector(mp)) { if (xfs_has_sector(mp)) {
geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
geo->logsectsize = sbp->sb_logsectsize; geo->logsectsize = sbp->sb_logsectsize;

4
fs/xfs/xfs_super.c
View file

@ -1746,6 +1746,10 @@ xfs_fs_fill_super(
xfs_warn(mp, xfs_warn(mp,
"EXPERIMENTAL exchange-range feature enabled. Use at your own risk!"); "EXPERIMENTAL exchange-range feature enabled. Use at your own risk!");
if (xfs_has_parent(mp))
xfs_warn(mp,
"EXPERIMENTAL parent pointer feature enabled. Use at your own risk!");
error = xfs_mountfs(mp); error = xfs_mountfs(mp);
if (error) if (error)
goto out_filestream_unmount; goto out_filestream_unmount;