[XFS] Add compat handlers for data & rt growfs ioctls

The args for XFS_IOC_FSGROWFSDATA and XFS_IOC_FSGROWFSRTA
have padding on the end on intel, so add arg copyin functions,
and then just call the growfs ioctl helpers.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

2 files changed, 54 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index 132f3dd2c7e8..d1ac5d5c009b 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -44,6 +44,8 @@
 #include "xfs_dfrag.h"
 #include "xfs_vnodeops.h"
 #include "xfs_fsops.h"
+#include "xfs_alloc.h"
+#include "xfs_rtalloc.h"
 #include "xfs_ioctl.h"
 #include "xfs_ioctl32.h"
 
@@ -85,6 +87,28 @@ xfs_compat_ioc_fsgeometry_v1(
 }
 
 STATIC int
+xfs_compat_growfs_data_copyin(
+        struct xfs_growfs_data   *in,
+        compat_xfs_growfs_data_t __user *arg32)
+{
+        if (get_user(in->newblocks, &arg32->newblocks) ||
+            get_user(in->imaxpct,   &arg32->imaxpct))
+                return -XFS_ERROR(EFAULT);
+        return 0;
+}
+
+STATIC int
+xfs_compat_growfs_rt_copyin(
+        struct xfs_growfs_rt     *in,
+        compat_xfs_growfs_rt_t  __user *arg32)
+{
+        if (get_user(in->newblocks, &arg32->newblocks) ||
+            get_user(in->extsize,   &arg32->extsize))
+                return -XFS_ERROR(EFAULT);
+        return 0;
+}
+
+STATIC int
 xfs_inumbers_fmt_compat(
         void                    __user *ubuffer,
         const xfs_inogrp_t      *buffer,
@@ -367,6 +391,22 @@ xfs_compat_ioctl(
         }
         case XFS_IOC_FSGEOMETRY_V1_32:
                 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
+        case XFS_IOC_FSGROWFSDATA_32: {
+                struct xfs_growfs_data  in;
+
+                if (xfs_compat_growfs_data_copyin(&in, arg))
+                        return -XFS_ERROR(EFAULT);
+                error = xfs_growfs_data(mp, &in);
+                return -error;
+        }
+        case XFS_IOC_FSGROWFSRT_32: {
+                struct xfs_growfs_rt    in;
+
+                if (xfs_compat_growfs_rt_copyin(&in, arg))
+                        return -XFS_ERROR(EFAULT);
+                error = xfs_growfs_rt(mp, &in);
+                return -error;
+        }
 #else /* These are handled fine if no alignment issues */
         case XFS_IOC_ALLOCSP:
         case XFS_IOC_FREESP:
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.h b/fs/xfs/linux-2.6/xfs_ioctl32.h
index bf08ab12a6f8..8b2a12a8e96f 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.h
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.h
@@ -177,6 +177,20 @@ typedef struct compat_xfs_inogrp {
         __u64           xi_allocmask;   /* mask of allocated inodes     */
 } __attribute__((packed)) compat_xfs_inogrp_t;
 
+/* These growfs input structures have padding on the end, so must translate */
+typedef struct compat_xfs_growfs_data {
+        __u64           newblocks;      /* new data subvol size, fsblocks */
+        __u32           imaxpct;        /* new inode space percentage limit */
+} __attribute__((packed)) compat_xfs_growfs_data_t;
+
+typedef struct compat_xfs_growfs_rt {
+        __u64           newblocks;      /* new realtime size, fsblocks */
+        __u32           extsize;        /* new realtime extent size, fsblocks */
+} __attribute__((packed)) compat_xfs_growfs_rt_t;
+
+#define XFS_IOC_FSGROWFSDATA_32 _IOW('X', 110, struct compat_xfs_growfs_data)
+#define XFS_IOC_FSGROWFSRT_32   _IOW('X', 112, struct compat_xfs_growfs_rt)
+
 #endif /* BROKEN_X86_ALIGNMENT */
 
 #endif /* __XFS_IOCTL32_H__ */