Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932262AbVI2Rfa (ORCPT ); Thu, 29 Sep 2005 13:35:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932281AbVI2Rfa (ORCPT ); Thu, 29 Sep 2005 13:35:30 -0400 Received: from NS6.Sony.CO.JP ([137.153.0.32]:48091 "EHLO ns6.sony.co.jp") by vger.kernel.org with ESMTP id S932262AbVI2Rfa (ORCPT ); Thu, 29 Sep 2005 13:35:30 -0400 Message-ID: <433C25D9.9090602@sm.sony.co.jp> Date: Fri, 30 Sep 2005 02:35:21 +0900 From: "Machida, Hiroyuki" User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: ja, en-us, en MIME-Version: 1.0 To: OGAWA Hirofumi , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] miss-sync changes on attributes (Re: [PATCH 2/2][FAT] miss-sync issues on sync mount (miss-sync on utime)) References: <43288A84.2090107@sm.sony.co.jp> <87oe6uwjy7.fsf@devron.myhome.or.jp> In-Reply-To: <87oe6uwjy7.fsf@devron.myhome.or.jp> Content-Type: multipart/mixed; boundary="------------090202080209030501050909" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5212 Lines: 157 This is a multi-part message in MIME format. --------------090202080209030501050909 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I revise a previous patch. Now checking dirty flag is done at vfs layer, as OGAWA-san said. I realized ext2_sync_inode() is good for syncing inode without it's data. I moved it to vfs layer and rename it to sync_inode_wodata(). The first patch attached here is changes on vfs layer. Second patch attached at the next mail is changes on ext2 fs. OGAWA Hirofumi wrote: > "Machida, Hiroyuki" writes: > > >>+ if ( (!error) && IS_SYNC(inode)) { >>+ error = write_inode_now(inode, 1); >>+ } > > > We don't need to sync the data pages at all here. And I think it is > not right place for doing this. If we need this, since we need to see > O_SYNC for fchxxx() VFS would be right place to do it. > > But, personally, I'd like to kill the "-o sync" stuff for these > independent meta data rather. Then... -- Hiroyuki Machida machida@sm.sony.co.jp --------------090202080209030501050909 Content-Type: text/plain; name="fs-sync-attr.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="fs-sync-attr.patch" This patch adds inode-sync after attribute changes, if needed. * fs-sync-attr.patch for 2.6.13 fs/fs-writeback.c | 19 +++++++++++++++++++ fs/open.c | 12 ++++++++++++ include/linux/fs.h | 1 + 4 files changed, 32 insertions(+) Signed-off-by: Hiroyuki Machida --- linux-2.6.13/fs/fs-writeback.c 2005-08-29 08:41:01.000000000 +0900 +++ linux-2.6.13-sync-attr/fs/fs-writeback.c 2005-09-29 12:56:21.052335295 +0900 @@ -593,6 +593,25 @@ int sync_inode(struct inode *inode, stru EXPORT_SYMBOL(sync_inode); /** + * sync_inode_wodata - sync(write and wait) inode to disk, without it's data. + * @inode: the inode to sync + * + * sync_inode_wodata() will write an inode then wait. It will also + * correctly update the inode on its superblock's dirty inode lists + * and will update inode->i_state. + * + * The caller must have a ref on the inode. + */ +int sync_inode_wodata(struct inode *inode) +{ + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, /* wait */ + .nr_to_write = 0,/* no data to be written */ + }; + return sync_inode(inode, &wbc); +} + +/** * generic_osync_inode - flush all dirty data for a given inode to disk * @inode: inode to write * @mapping: the address_space that should be flushed diff -upr linux-2.6.13/fs/open.c linux-2.6.13-sync-attr/fs/open.c --- linux-2.6.13/fs/open.c 2005-08-29 08:41:01.000000000 +0900 +++ linux-2.6.13-sync-attr/fs/open.c 2005-09-30 01:29:45.279437136 +0900 @@ -207,6 +207,8 @@ int do_truncate(struct dentry *dentry, l down(&dentry->d_inode->i_sem); err = notify_change(dentry, &newattrs); + if (!err && IS_SYNC(dentry->d_inode)) + sync_inode_wodata(dentry->d_inode); up(&dentry->d_inode->i_sem); return err; } @@ -394,6 +396,8 @@ asmlinkage long sys_utime(char __user * } down(&inode->i_sem); error = notify_change(nd.dentry, &newattrs); + if (!error && IS_SYNC(inode)) + sync_inode_wodata(inode); up(&inode->i_sem); dput_and_out: path_release(&nd); @@ -447,6 +451,8 @@ long do_utimes(char __user * filename, s } down(&inode->i_sem); error = notify_change(nd.dentry, &newattrs); + if (!error && IS_SYNC(inode)) + sync_inode_wodata(inode); up(&inode->i_sem); dput_and_out: path_release(&nd); @@ -620,6 +626,8 @@ asmlinkage long sys_fchmod(unsigned int newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO); newattrs.ia_valid = ATTR_MODE | ATTR_CTIME; err = notify_change(dentry, &newattrs); + if (!err && IS_SYNC(inode)) + sync_inode_wodata(inode); up(&inode->i_sem); out_putf: @@ -654,6 +662,8 @@ asmlinkage long sys_chmod(const char __u newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO); newattrs.ia_valid = ATTR_MODE | ATTR_CTIME; error = notify_change(nd.dentry, &newattrs); + if (!error && IS_SYNC(inode)) + sync_inode_wodata(inode); up(&inode->i_sem); dput_and_out: @@ -692,6 +702,8 @@ static int chown_common(struct dentry * newattrs.ia_valid |= ATTR_KILL_SUID|ATTR_KILL_SGID; down(&inode->i_sem); error = notify_change(dentry, &newattrs); + if (!error && IS_SYNC(inode)) + sync_inode_wodata(inode); up(&inode->i_sem); out: return error; diff -upr linux-2.6.13/include/linux/fs.h linux-2.6.13-sync-attr/include/linux/fs.h --- linux-2.6.13/include/linux/fs.h 2005-08-29 08:41:01.000000000 +0900 +++ linux-2.6.13-sync-attr/include/linux/fs.h 2005-09-30 01:29:06.278507000 +0900 @@ -1082,6 +1082,7 @@ static inline void file_accessed(struct } int sync_inode(struct inode *inode, struct writeback_control *wbc); +int sync_inode_wodata(struct inode *inode); /** * struct export_operations - for nfsd to communicate with file systems --------------090202080209030501050909-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/