[PATCH] r/o bind mounts: elevate write count for rmdir and unlink.
[linux-2.6.git] / fs / namei.c
index a1f8bbb..89ef317 100644 (file)
@@ -2190,7 +2190,12 @@ static long do_rmdir(int dfd, const char __user *pathname)
        error = PTR_ERR(dentry);
        if (IS_ERR(dentry))
                goto exit2;
+       error = mnt_want_write(nd.path.mnt);
+       if (error)
+               goto exit3;
        error = vfs_rmdir(nd.path.dentry->d_inode, dentry);
+       mnt_drop_write(nd.path.mnt);
+exit3:
        dput(dentry);
 exit2:
        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
@@ -2271,7 +2276,11 @@ static long do_unlinkat(int dfd, const char __user *pathname)
                inode = dentry->d_inode;
                if (inode)
                        atomic_inc(&inode->i_count);
+               error = mnt_want_write(nd.path.mnt);
+               if (error)
+                       goto exit2;
                error = vfs_unlink(nd.path.dentry->d_inode, dentry);
+               mnt_drop_write(nd.path.mnt);
        exit2:
                dput(dentry);
        }