From: Darrick J. Wong <djwong@xxxxxxxxxx>
Define helper functions to lock all metadata inodes related to a
realtime group. There's not much to look at now, but this will become
important when we add per-rtgroup metadata files and online fsck code
for them.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_rtgroup.c | 33 +++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_rtgroup.h | 14 ++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_rtgroup.c b/fs/xfs/libxfs/xfs_rtgroup.c
index 037506b73384..3bf85ab524f6 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.c
+++ b/fs/xfs/libxfs/xfs_rtgroup.c
@@ -499,3 +499,36 @@ xfs_rtgroup_update_secondary_sbs(
return saved_error ? saved_error : error;
}
+
+/* Lock metadata inodes associated with this rt group. */
+void
+xfs_rtgroup_lock(
+ struct xfs_trans *tp,
+ struct xfs_rtgroup *rtg,
+ unsigned int rtglock_flags)
+{
+ ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS));
+ ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) ||
+ !(rtglock_flags & XFS_RTGLOCK_BITMAP));
+
+ if (rtglock_flags & XFS_RTGLOCK_BITMAP)
+ xfs_rtbitmap_lock(tp, rtg->rtg_mount);
+ else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED)
+ xfs_rtbitmap_lock_shared(rtg->rtg_mount, XFS_RBMLOCK_BITMAP);
+}
+
+/* Unlock metadata inodes associated with this rt group. */
+void
+xfs_rtgroup_unlock(
+ struct xfs_rtgroup *rtg,
+ unsigned int rtglock_flags)
+{
+ ASSERT(!(rtglock_flags & ~XFS_RTGLOCK_ALL_FLAGS));
+ ASSERT(!(rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED) ||
+ !(rtglock_flags & XFS_RTGLOCK_BITMAP));
+
+ if (rtglock_flags & XFS_RTGLOCK_BITMAP)
+ xfs_rtbitmap_unlock(rtg->rtg_mount);
+ else if (rtglock_flags & XFS_RTGLOCK_BITMAP_SHARED)
+ xfs_rtbitmap_unlock_shared(rtg->rtg_mount, XFS_RBMLOCK_BITMAP);
+}
diff --git a/fs/xfs/libxfs/xfs_rtgroup.h b/fs/xfs/libxfs/xfs_rtgroup.h
index 0e664e2436b0..b1e53af5a65b 100644
--- a/fs/xfs/libxfs/xfs_rtgroup.h
+++ b/fs/xfs/libxfs/xfs_rtgroup.h
@@ -210,11 +210,25 @@ void xfs_rtgroup_update_super(struct xfs_buf *rtsb_bp,
const struct xfs_buf *sb_bp);
void xfs_rtgroup_log_super(struct xfs_trans *tp, const struct xfs_buf *sb_bp);
int xfs_rtgroup_update_secondary_sbs(struct xfs_mount *mp);
+
+/* Lock the rt bitmap inode in exclusive mode */
+#define XFS_RTGLOCK_BITMAP (1U << 0)
+/* Lock the rt bitmap inode in shared mode */
+#define XFS_RTGLOCK_BITMAP_SHARED (1U << 1)
+
+#define XFS_RTGLOCK_ALL_FLAGS (XFS_RTGLOCK_BITMAP | \
+ XFS_RTGLOCK_BITMAP_SHARED)
+
+void xfs_rtgroup_lock(struct xfs_trans *tp, struct xfs_rtgroup *rtg,
+ unsigned int rtglock_flags);
+void xfs_rtgroup_unlock(struct xfs_rtgroup *rtg, unsigned int rtglock_flags);
#else
# define xfs_rtgroup_block_count(mp, rgno) (0)
# define xfs_rtgroup_update_super(bp, sb_bp) ((void)0)
# define xfs_rtgroup_log_super(tp, sb_bp) ((void)0)
# define xfs_rtgroup_update_secondary_sbs(mp) (0)
+# define xfs_rtgroup_lock(tp, rtg, gf) ((void)0)
+# define xfs_rtgroup_unlock(rtg, gf) ((void)0)
#endif /* CONFIG_XFS_RT */
#endif /* __LIBXFS_RTGROUP_H */
