xfs: use mnt_want_write in compat_attrmulti ioctl

[linux-block.git] / fs / xfs / linux-2.6 / xfs_ioctl32.c

diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index fd4362063f25e172e633156a22f5fbfed3e79722..c70c4e3db7900adfbb2ceb9506a3a0a5ac688787 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -17,6 +17,7 @@
  */
 #include <linux/compat.h>
 #include <linux/ioctl.h>
+#include <linux/mount.h>
 #include <asm/uaccess.h>
 #include "xfs.h"
 #include "xfs_fs.h"
@@ -458,15 +459,23 @@ xfs_compat_attrmulti_by_handle(
                                        &ops[i].am_length, ops[i].am_flags);
                        break;
                case ATTR_OP_SET:
+                       ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
+                       if (ops[i].am_error)
+                               break;
                        ops[i].am_error = xfs_attrmulti_attr_set(
                                        dentry->d_inode, attr_name,
                                        compat_ptr(ops[i].am_attrvalue),
                                        ops[i].am_length, ops[i].am_flags);
+                       mnt_drop_write(parfilp->f_path.mnt);
                        break;
                case ATTR_OP_REMOVE:
+                       ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
+                       if (ops[i].am_error)
+                               break;
                        ops[i].am_error = xfs_attrmulti_attr_remove(
                                        dentry->d_inode, attr_name,
                                        ops[i].am_flags);
+                       mnt_drop_write(parfilp->f_path.mnt);
                        break;
                default:
                        ops[i].am_error = EINVAL;