From: Christoph Hellwig <hch@lst.de>
To: akpm@osdl.org
Cc: linux-fsdevel@vger.kernel.org
Subject: [PATCH] add some notes on file_update_time
Date: Fri, 11 Nov 2005 00:38:18 +0100 [thread overview]
Message-ID: <20051110233818.GA19368@lst.de> (raw)
add some notes on why this function should only be used in the write
methods, and what NOCTIME is about.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: linux-2.6/fs/inode.c
===================================================================
--- linux-2.6.orig/fs/inode.c 2005-11-08 12:57:19.000000000 +0100
+++ linux-2.6/fs/inode.c 2005-11-08 12:57:19.000000000 +0100
@@ -1211,7 +1211,12 @@
* @file: file accessed
*
* Update the mtime and ctime members of an inode and mark the inode
- * for writeback.
+ * for writeback. Note that this function is meant exclusively for
+ * usage in the file write path of filesystems, and filesystems may
+ * chose to explicitly ignore update via this function with the
+ * S_NOCTIME inode flag, e.g. for network filesystem where these
+ * timestamps are handled by the server. All explicit ctime/mtime
+ * updates must be done via notify_change().
*/
void file_update_time(struct file *file)
next reply other threads:[~2005-11-10 23:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-10 23:38 Christoph Hellwig [this message]
2005-11-10 23:41 ` [PATCH] add some notes on file_update_time Anton Altaparmakov
2005-11-10 23:45 ` Christoph Hellwig
2005-11-10 23:47 ` Christoph Hellwig
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