xfs: fall back to native ioctls for unhandled compat ones

Always try the native ioctl if we don't have a compat handler.  This
removes a lot of boilerplate code as 'modern' ioctls should generally
be compat clean, and fixes the missing entries for the recently added
FS_IOC_GETFSLABEL/FS_IOC_SETFSLABEL ioctls.

Fixes: f7664b31975b ("xfs: implement online get/set fs label")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 7fcf756..bae08ef 100644 (file)
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -553,57 +553,6 @@ xfs_file_compat_ioctl(
        trace_xfs_file_compat_ioctl(ip);
 
        switch (cmd) {
-       /* No size or alignment issues on any arch */
-       case XFS_IOC_DIOINFO:
-       case XFS_IOC_FSGEOMETRY_V4:
-       case XFS_IOC_FSGEOMETRY:
-       case XFS_IOC_AG_GEOMETRY:
-       case XFS_IOC_FSGETXATTR:
-       case XFS_IOC_FSSETXATTR:
-       case XFS_IOC_FSGETXATTRA:
-       case XFS_IOC_FSSETDM:
-       case XFS_IOC_GETBMAP:
-       case XFS_IOC_GETBMAPA:
-       case XFS_IOC_GETBMAPX:
-       case XFS_IOC_FSCOUNTS:
-       case XFS_IOC_SET_RESBLKS:
-       case XFS_IOC_GET_RESBLKS:
-       case XFS_IOC_FSGROWFSLOG:
-       case XFS_IOC_GOINGDOWN:
-       case XFS_IOC_ERROR_INJECTION:
-       case XFS_IOC_ERROR_CLEARALL:
-       case FS_IOC_GETFSMAP:
-       case XFS_IOC_SCRUB_METADATA:
-       case XFS_IOC_BULKSTAT:
-       case XFS_IOC_INUMBERS:
-               return xfs_file_ioctl(filp, cmd, p);
-#if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
-       /*
-        * These are handled fine if no alignment issues.  To support x32
-        * which uses native 64-bit alignment we must emit these cases in
-        * addition to the ia-32 compat set below.
-        */
-       case XFS_IOC_ALLOCSP:
-       case XFS_IOC_FREESP:
-       case XFS_IOC_RESVSP:
-       case XFS_IOC_UNRESVSP:
-       case XFS_IOC_ALLOCSP64:
-       case XFS_IOC_FREESP64:
-       case XFS_IOC_RESVSP64:
-       case XFS_IOC_UNRESVSP64:
-       case XFS_IOC_FSGEOMETRY_V1:
-       case XFS_IOC_FSGROWFSDATA:
-       case XFS_IOC_FSGROWFSRT:
-       case XFS_IOC_ZERO_RANGE:
-#ifdef CONFIG_X86_X32
-       /*
-        * x32 special: this gets a different cmd number from the ia-32 compat
-        * case below; the associated data will match native 64-bit alignment.
-        */
-       case XFS_IOC_SWAPEXT:
-#endif
-               return xfs_file_ioctl(filp, cmd, p);
-#endif
 #if defined(BROKEN_X86_ALIGNMENT)
        case XFS_IOC_ALLOCSP_32:
        case XFS_IOC_FREESP_32:
@@ -705,6 +654,7 @@ xfs_file_compat_ioctl(
        case XFS_IOC_FSSETDM_BY_HANDLE_32:
                return xfs_compat_fssetdm_by_handle(filp, arg);
        default:
-               return -ENOIOCTLCMD;
+               /* try the native version */
+               return xfs_file_ioctl(filp, cmd, p);
        }
 }