[PATCH 19/46] xfs: export the geometry of realtime groups to userspace

Darrick J. Wong
2024-12-06T23:56:19Z

From: Darrick J. Wong <djwong@kernel.org>

Source kernel commit: 3fa7a6d0c7eb264e469eaf1e3ef59b6793a853ee

Create an ioctl so that the kernel can report the status of realtime
groups to userspace.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
libxfs/util.c | 7 +++++++
libxfs/xfs_fs.h | 16 ++++++++++++++++
libxfs/xfs_health.h | 2 ++
libxfs/xfs_rtgroup.c | 14 ++++++++++++++
libxfs/xfs_rtgroup.h | 4 ++++
5 files changed, 43 insertions(+)

diff --git a/libxfs/util.c b/libxfs/util.c
index 83f2f048bbe9f2..ed48e2045b484b 100644
--- a/libxfs/util.c
+++ b/libxfs/util.c
@@ -492,6 +492,13 @@ xfs_fs_mark_healthy(
}

void xfs_ag_geom_health(struct xfs_perag *pag, struct xfs_ag_geometry *ageo) { }
+void
+xfs_rtgroup_geom_health(
+ struct xfs_rtgroup *rtg,
+ struct xfs_rtgroup_geometry *rgeo)
+{
+ /* empty */
+}
void xfs_fs_mark_sick(struct xfs_mount *mp, unsigned int mask) { }
void xfs_agno_mark_sick(struct xfs_mount *mp, xfs_agnumber_t agno,
unsigned int mask) { }
diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 5c224d03270ce9..4c0682173d6144 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -971,6 +971,21 @@ struct xfs_getparents_by_handle {
struct xfs_getparents gph_request;
};

+/*
+ * Output for XFS_IOC_RTGROUP_GEOMETRY
+ */
+struct xfs_rtgroup_geometry {
+ __u32 rg_number; /* i/o: rtgroup number */
+ __u32 rg_length; /* o: length in blocks */
+ __u32 rg_sick; /* o: sick things in ag */
+ __u32 rg_checked; /* o: checked metadata in ag */
+ __u32 rg_flags; /* i/o: flags for this ag */
+ __u32 rg_reserved[27]; /* o: zero */
+};
+#define XFS_RTGROUP_GEOM_SICK_SUPER (1U << 0) /* superblock */
+#define XFS_RTGROUP_GEOM_SICK_BITMAP (1U << 1) /* rtbitmap */
+#define XFS_RTGROUP_GEOM_SICK_SUMMARY (1U << 2) /* rtsummary */
+
/*
* ioctl commands that are used by Linux filesystems
*/
@@ -1009,6 +1024,7 @@ struct xfs_getparents_by_handle {
#define XFS_IOC_GETPARENTS _IOWR('X', 62, struct xfs_getparents)
#define XFS_IOC_GETPARENTS_BY_HANDLE _IOWR('X', 63, struct xfs_getparents_by_handle)
#define XFS_IOC_SCRUBV_METADATA _IOWR('X', 64, struct xfs_scrub_vec_head)
+#define XFS_IOC_RTGROUP_GEOMETRY _IOWR('X', 65, struct xfs_rtgroup_geometry)

/*
* ioctl commands that replace IRIX syssgi()'s
diff --git a/libxfs/xfs_health.h b/libxfs/xfs_health.h
index 3d93b57cf57143..d34986ac18c3fa 100644
--- a/libxfs/xfs_health.h
+++ b/libxfs/xfs_health.h
@@ -278,6 +278,8 @@ xfs_inode_is_healthy(struct xfs_inode *ip)

void xfs_fsop_geom_health(struct xfs_mount *mp, struct xfs_fsop_geom *geo);
void xfs_ag_geom_health(struct xfs_perag *pag, struct xfs_ag_geometry *ageo);
+void xfs_rtgroup_geom_health(struct xfs_rtgroup *rtg,
+ struct xfs_rtgroup_geometry *rgeo);
void xfs_bulkstat_health(struct xfs_inode *ip, struct xfs_bulkstat *bs);

#define xfs_metadata_is_sick(error) \
diff --git a/libxfs/xfs_rtgroup.c b/libxfs/xfs_rtgroup.c
index f753ed5fc05588..50cfb038f03b79 100644
--- a/libxfs/xfs_rtgroup.c
+++ b/libxfs/xfs_rtgroup.c
@@ -211,6 +211,20 @@ xfs_rtgroup_trans_join(
}
}

+/* Retrieve rt group geometry. */
+int
+xfs_rtgroup_get_geometry(
+ struct xfs_rtgroup *rtg,
+ struct xfs_rtgroup_geometry *rgeo)
+{
+ /* Fill out form. */
+ memset(rgeo, 0, sizeof(*rgeo));
+ rgeo->rg_number = rtg_rgno(rtg);
+ rgeo->rg_length = rtg->rtg_extents * rtg_mount(rtg)->m_sb.sb_rextsize;
+ xfs_rtgroup_geom_health(rtg, rgeo);
+ return 0;
+}
+
#ifdef CONFIG_PROVE_LOCKING
static struct lock_class_key xfs_rtginode_lock_class;

diff --git a/libxfs/xfs_rtgroup.h b/libxfs/xfs_rtgroup.h
index fba62b26912a89..026f34f984b32f 100644
--- a/libxfs/xfs_rtgroup.h
+++ b/libxfs/xfs_rtgroup.h
@@ -234,6 +234,9 @@ void xfs_rtgroup_unlock(struct xfs_rtgroup *rtg, unsigned int rtglock_flags);
void xfs_rtgroup_trans_join(struct xfs_trans *tp, struct xfs_rtgroup *rtg,
unsigned int rtglock_flags);

+int xfs_rtgroup_get_geometry(struct xfs_rtgroup *rtg,
+ struct xfs_rtgroup_geometry *rgeo);
+
int xfs_rtginode_mkdir_parent(struct xfs_mount *mp);
int xfs_rtginode_load_parent(struct xfs_trans *tp);

@@ -277,6 +280,7 @@ static inline int xfs_initialize_rtgroups(struct xfs_mount *mp,
# define xfs_rtgroup_trans_join(tp, rtg, gf) ((void)0)
# define xfs_update_rtsb(bp, sb_bp) ((void)0)
# define xfs_log_rtsb(tp, sb_bp) (NULL)
+# define xfs_rtgroup_get_geometry(rtg, rgeo) (-EOPNOTSUPP)
#endif /* CONFIG_XFS_RT */

#endif /* __LIBXFS_RTGROUP_H */