btrfs: fix send ioctl on 32bit with 64bit kernel
We pass in a pointer in our send arg struct, this means the struct size
doesn't match with 32bit user space and 64bit kernel space. Fix this by
adding a compat mode and doing the appropriate conversion.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ move structure to the beginning, next to receive 32bit compat ]
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/send.h b/fs/btrfs/send.h
index 02e0016..3aa4bc5 100644
--- a/fs/btrfs/send.h
+++ b/fs/btrfs/send.h
@@ -130,5 +130,5 @@ enum {
#define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
#ifdef __KERNEL__
-long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
+long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg);
#endif