From: Ben Myers Subject: [PATCH 2/2] xfs_export_operations.commit_metadata Date: Thu, 11 Feb 2010 13:26:22 -0600 Message-ID: <20100211192622.12949.93762.stgit@case> References: <20100211192611.12949.65493.stgit@case> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: xfs@oss.sgi.com To: linux-nfs@vger.kernel.org Return-path: Received: from relay3.sgi.com ([192.48.152.1]:54766 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756714Ab0BKT0Y (ORCPT ); Thu, 11 Feb 2010 14:26:24 -0500 In-Reply-To: <20100211192611.12949.65493.stgit@case> Sender: linux-nfs-owner@vger.kernel.org List-ID: This is the commit_metadata export operation for XFS, including the changes suggested by hch and dgc: - Takes two two inodes instead of dentries and can assume the parent is always set. - Uses xfs_lock_two_inodes for the ilock. - Forces the log up to the larger lsn of parent and child. - Uses XFS_LSN_CMP for lsn comparison. - Doesn't force the log if nobody had a pincount. Signed-off-by: Ben Myers --- fs/xfs/linux-2.6/xfs_export.c | 43 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c index 87b8cbd..d37ced1 100644 --- a/fs/xfs/linux-2.6/xfs_export.c +++ b/fs/xfs/linux-2.6/xfs_export.c @@ -29,6 +29,7 @@ #include "xfs_vnodeops.h" #include "xfs_bmap_btree.h" #include "xfs_inode.h" +#include "xfs_inode_item.h" /* * Note that we only accept fileids which are long enough rather than allow @@ -215,9 +216,51 @@ xfs_fs_get_parent( return d_obtain_alias(VFS_I(cip)); } +STATIC int +xfs_fs_nfs_commit_metadata( + struct inode *parent, + struct inode *child) +{ + struct xfs_inode *dp = XFS_I(parent); + struct xfs_inode *ip = NULL; + struct xfs_mount *mp = dp->i_mount; + xfs_lsn_t force_lsn = NULLCOMMITLSN; + int error = 0; + + if (child) { + ip = XFS_I(child); + xfs_lock_two_inodes(dp, ip, XFS_ILOCK_SHARED); + } else { + xfs_ilock(dp, XFS_ILOCK_SHARED); + } + + if (xfs_ipincount(dp)) { + force_lsn = dp->i_itemp->ili_last_lsn; + if (ip && xfs_ipincount(ip) && + XFS_LSN_CMP(force_lsn, ip->i_itemp->ili_last_lsn) < 0) { + force_lsn = ip->i_itemp->ili_last_lsn; + } + } else if (ip && xfs_ipincount(ip)) { + force_lsn = ip->i_itemp->ili_last_lsn; + } + + if (force_lsn != NULLCOMMITLSN) { + error = _xfs_log_force(mp, force_lsn, + XFS_LOG_FORCE | XFS_LOG_SYNC, NULL); + } + + if (child) + xfs_iunlock(ip, XFS_ILOCK_SHARED); + if (parent) + xfs_iunlock(dp, XFS_ILOCK_SHARED); + + return error; +} + const struct export_operations xfs_export_operations = { .encode_fh = xfs_fs_encode_fh, .fh_to_dentry = xfs_fs_fh_to_dentry, .fh_to_parent = xfs_fs_fh_to_parent, .get_parent = xfs_fs_get_parent, + .commit_metadata = xfs_fs_nfs_commit_metadata, };