Create an ioctl that can be used to scrub internal filesystem metadata.
The new ioctl takes the metadata type, an (optional) AG number, an
(optional) inode number and generation, and a flags argument. This will
be used by the upcoming XFS online scrub tool.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
libxfs/xfs_fs.h | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 6857355..27878cf 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -578,6 +578,40 @@ typedef struct xfs_swapext
#define XFS_FSOP_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
#define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
+/* metadata scrubbing */
+struct xfs_scrub_metadata {
+ __u32 sm_type; /* What to check? */
+ __u32 sm_flags; /* Flags; none defined right now. */
+ union {
+ __u32 __agno;
+ struct {
+ __u64 __ino;
+ __u32 __gen;
+ } i;
+ __u64 __reserved[7]; /* pad to 64 bytes */
+ } p;
+};
+#define sm_agno p.__agno
+#define sm_ino p.i.__ino
+#define sm_gen p.i.__gen
+
+/*
+ * Metadata types and flags for scrub operation.
+ */
+#define XFS_SCRUB_TYPE_TEST 0 /* dummy to test ioctl */
+#define XFS_SCRUB_TYPE_MAX 0
+
+#define XFS_SCRUB_FLAG_REPAIR 0x1 /* i: repair this metadata */
+#define XFS_SCRUB_FLAG_CORRUPT 0x2 /* o: needs repair */
+#define XFS_SCRUB_FLAG_PREEN 0x4 /* o: could be optimized */
+#define XFS_SCRUB_FLAG_XREF_FAIL 0x8 /* o: errors during cross-referencing */
+
+#define XFS_SCRUB_FLAGS_IN (XFS_SCRUB_FLAG_REPAIR)
+#define XFS_SCRUB_FLAGS_OUT (XFS_SCRUB_FLAG_CORRUPT | \
+ XFS_SCRUB_FLAG_PREEN | \
+ XFS_SCRUB_FLAG_XREF_FAIL)
+#define XFS_SCRUB_FLAGS_ALL (XFS_SCRUB_FLAGS_IN | XFS_SCRUB_FLAGS_OUT)
+
/*
* ioctl limits
*/
@@ -587,6 +621,7 @@ typedef struct xfs_swapext
# define XFS_XATTR_LIST_MAX 65536
#endif
+
/*
* ioctl commands that are used by Linux filesystems
*/
@@ -618,6 +653,7 @@ typedef struct xfs_swapext
#define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64)
#define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_fs_eofblocks)
#define XFS_IOC_GETFSMAP _IOWR('X', 59, struct fsmap_head)
+#define XFS_IOC_SCRUB_METADATA _IOWR('X', 60, struct xfs_scrub_metadata)
/*
* ioctl commands that replace IRIX syssgi()'s
--
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