xfs: create an ioctl to scrub AG metadata
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@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index b01a198..d7251e1 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -44,6 +44,7 @@
#include "xfs_btree.h"
#include <linux/fsmap.h>
#include "xfs_fsmap.h"
+#include "scrub/xfs_scrub.h"
#include <linux/capability.h>
#include <linux/cred.h>
@@ -1701,6 +1702,30 @@ xfs_ioc_getfsmap(
return 0;
}
+STATIC int
+xfs_ioc_scrub_metadata(
+ struct xfs_inode *ip,
+ void __user *arg)
+{
+ struct xfs_scrub_metadata scrub;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&scrub, arg, sizeof(scrub)))
+ return -EFAULT;
+
+ error = xfs_scrub_metadata(ip, &scrub);
+ if (error)
+ return error;
+
+ if (copy_to_user(arg, &scrub, sizeof(scrub)))
+ return -EFAULT;
+
+ return 0;
+}
+
int
xfs_ioc_swapext(
xfs_swapext_t *sxp)
@@ -1882,6 +1907,9 @@ xfs_file_ioctl(
case FS_IOC_GETFSMAP:
return xfs_ioc_getfsmap(ip, arg);
+ case XFS_IOC_SCRUB_METADATA:
+ return xfs_ioc_scrub_metadata(ip, arg);
+
case XFS_IOC_FD_TO_HANDLE:
case XFS_IOC_PATH_TO_HANDLE:
case XFS_IOC_PATH_TO_FSHANDLE: {