[XFS] Compat ioctl handler for XFS_IOC_FSGEOMETRY_V1.

i386 struct xfs_fsop_geom_v1 has no padding after the last member, so the
size is different.

SGI-PV: 967354
SGI-Modid: xfs-linux-melb:xfs-kern:29100a

Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index b83cebc165f1..5b91335e97dd 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -75,6 +75,42 @@ xfs_ioctl32_flock(
         return (unsigned long)p;
 }
 
+typedef struct compat_xfs_fsop_geom_v1 {
+        __u32           blocksize;      /* filesystem (data) block size */
+        __u32           rtextsize;      /* realtime extent size         */
+        __u32           agblocks;       /* fsblocks in an AG            */
+        __u32           agcount;        /* number of allocation groups  */
+        __u32           logblocks;      /* fsblocks in the log          */
+        __u32           sectsize;       /* (data) sector size, bytes    */
+        __u32           inodesize;      /* inode size in bytes          */
+        __u32           imaxpct;        /* max allowed inode space(%)   */
+        __u64           datablocks;     /* fsblocks in data subvolume   */
+        __u64           rtblocks;       /* fsblocks in realtime subvol  */
+        __u64           rtextents;      /* rt extents in realtime subvol*/
+        __u64           logstart;       /* starting fsblock of the log  */
+        unsigned char   uuid[16];       /* unique id of the filesystem  */
+        __u32           sunit;          /* stripe unit, fsblocks        */
+        __u32           swidth;         /* stripe width, fsblocks       */
+        __s32           version;        /* structure version            */
+        __u32           flags;          /* superblock version flags     */
+        __u32           logsectsize;    /* log sector size, bytes       */
+        __u32           rtsectsize;     /* realtime sector size, bytes  */
+        __u32           dirblocksize;   /* directory block size, bytes  */
+} __attribute__((packed)) compat_xfs_fsop_geom_v1_t;
+
+#define XFS_IOC_FSGEOMETRY_V1_32  \
+        _IOR ('X', 100, struct compat_xfs_fsop_geom_v1)
+
+STATIC unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
+{
+        compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
+        xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));
+
+        if (copy_in_user(p, p32, sizeof(*p32)))
+                return -EFAULT;
+        return (unsigned long)p;
+}
+
 #else
 
 typedef struct xfs_fsop_bulkreq32 {
@@ -118,7 +154,6 @@ xfs_compat_ioctl(
 
         switch (cmd) {
         case XFS_IOC_DIOINFO:
-        case XFS_IOC_FSGEOMETRY_V1:
         case XFS_IOC_FSGEOMETRY:
         case XFS_IOC_GETVERSION:
         case XFS_IOC_GETXFLAGS:
@@ -166,6 +201,10 @@ xfs_compat_ioctl(
                 arg = xfs_ioctl32_flock(arg);
                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
                 break;
+        case XFS_IOC_FSGEOMETRY_V1_32:
+                arg = xfs_ioctl32_geom_v1(arg);
+                cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
+                break;
 
 #else /* These are handled fine if no alignment issues */
         case XFS_IOC_ALLOCSP:
@@ -176,6 +215,7 @@ xfs_compat_ioctl(
         case XFS_IOC_FREESP64:
         case XFS_IOC_RESVSP64:
         case XFS_IOC_UNRESVSP64:
+        case XFS_IOC_FSGEOMETRY_V1:
                 break;
 
         /* xfs_bstat_t still has wrong u32 vs u64 alignment */