From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: [PATCH 12/26] elevate write count for link and symlink calls Date: Fri, 22 Jun 2007 13:03:18 -0700 Message-ID: <20070622200318.789CDBFD@kernel> References: <20070622200303.82D9CC3A@kernel> Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org, viro@ftp.linux.org.uk, Dave Hansen To: akpm@osdl.org Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:48080 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751154AbXFVUDX (ORCPT ); Fri, 22 Jun 2007 16:03:23 -0400 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e5.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id l5MK3M4Z003360 for ; Fri, 22 Jun 2007 16:03:22 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v8.3) with ESMTP id l5MK3LL9485384 for ; Fri, 22 Jun 2007 16:03:21 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l5MK3KTs014600 for ; Fri, 22 Jun 2007 16:03:21 -0400 In-Reply-To: <20070622200303.82D9CC3A@kernel> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Signed-off-by: Dave Hansen --- lxc-dave/fs/namei.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff -puN fs/namei.c~09-24-elevate-write-count-for-link-and-symlink-calls fs/namei.c --- lxc/fs/namei.c~09-24-elevate-write-count-for-link-and-symlink-calls 2007-06-21 23:23:19.000000000 -0700 +++ lxc-dave/fs/namei.c 2007-06-21 23:23:19.000000000 -0700 @@ -2244,7 +2244,12 @@ asmlinkage long sys_symlinkat(const char if (IS_ERR(dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO); + mnt_drop_write(nd.mnt); +out_dput: dput(dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); @@ -2339,7 +2344,12 @@ asmlinkage long sys_linkat(int olddfd, c error = PTR_ERR(new_dentry); if (IS_ERR(new_dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry); + mnt_drop_write(nd.mnt); +out_dput: dput(new_dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); _