[patch 10/11] Hook up compat XFS_IOC_FSSETDM_BY_HANDLE ioctl handler

[sandeen@xxxxxxxxxxx]

Add a compat handler for XFS_IOC_FSSETDM_BY_HANDLE.

I haven't tested this, lacking dmapi tools to do so
(unless xfsqa magically gets this somehow?)

Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>
--

Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ioctl32.c
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -585,6 +585,44 @@ xfs_attrmulti_by_handle_compat(
        return -error;
 }
 
+STATIC int
+compat_xfs_fssetdm_by_handle(
+       void                    __user *arg,
+       struct inode            *parinode)
+{
+       int                     error;
+       struct fsdmidata        fsd;
+       compat_xfs_fsop_setdm_handlereq_t dmhreq;
+       struct inode            *inode;
+       xfs_mount_t             *mp = XFS_I(parinode)->i_mount;
+
+       if (!capable(CAP_MKNOD))
+               return -XFS_ERROR(EPERM);
+       if (copy_from_user(&dmhreq, arg, 
sizeof(compat_xfs_fsop_setdm_handlereq_t)))
+               return -XFS_ERROR(EFAULT);
+
+       error = xfs_vget_fsop_handlereq_compat(mp, parinode, &dmhreq.hreq, 
&inode);
+       if (error)
+               return -error;
+
+       if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
+               error = -XFS_ERROR(EPERM);
+               goto out;
+       }
+
+       if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
+               error = -XFS_ERROR(EFAULT);
+               goto out;
+       }
+
+       error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask,
+                                fsd.fsd_dmstate);
+
+out:
+       iput(inode);
+       return error;
+}
+
 STATIC long
 xfs_compat_ioctl(
        int             mode,
@@ -605,7 +643,6 @@ xfs_compat_ioctl(
        case XFS_IOC_GETBMAP:
        case XFS_IOC_GETBMAPA:
        case XFS_IOC_GETBMAPX:
-/*     case XFS_IOC_FSSETDM_BY_HANDLE: not handled */
        case XFS_IOC_FSCOUNTS:
        case XFS_IOC_SET_RESBLKS:
        case XFS_IOC_GET_RESBLKS:
@@ -681,6 +718,8 @@ xfs_compat_ioctl(
                return xfs_attrlist_by_handle_compat((void __user*)arg, inode);
        case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
                return xfs_attrmulti_by_handle_compat((void __user*)arg, inode);
+       case XFS_IOC_FSSETDM_BY_HANDLE_32:
+               return compat_xfs_fssetdm_by_handle((void __user*)arg, inode);
        default:
                return -XFS_ERROR(ENOIOCTLCMD);
        }
Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ioctl32.h
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_ioctl32.h
+++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_ioctl32.h
@@ -151,6 +151,15 @@ typedef struct compat_xfs_fsop_attrmulti
 #define XFS_IOC_ATTRMULTI_BY_HANDLE_32 \
        _IOW ('X', 123, struct compat_xfs_fsop_attrmulti_handlereq)
 
+typedef struct compat_xfs_fsop_setdm_handlereq {
+       struct compat_xfs_fsop_handlereq hreq;  /* handle information   */
+       /* ptr to struct fsdmidata */
+       compat_uptr_t                   data;   /* DMAPI data   */
+} compat_xfs_fsop_setdm_handlereq_t;
+
+#define XFS_IOC_FSSETDM_BY_HANDLE_32 \
+       _IOW ('X', 121, struct compat_xfs_fsop_setdm_handlereq)
+
 #ifdef BROKEN_X86_ALIGNMENT
 /* on ia32 l_start is on a 32-bit boundary */
 typedef struct compat_xfs_flock64 {

--