From: Bobi Jam <bobijam.xu@intel.com>
Date: Sun, 27 Apr 2014 17:06:44 +0000 (-0400)
Subject: staging/lustre/llite: issue OST_SYNC for fsync()
X-Git-Tag: firefly_0821_release~176^2~3465^2~39^2~1145
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8d97deb97dde884eb08d0c3b69ccfcc5a43b1350;p=firefly-linux-kernel-4.4.55.git

staging/lustre/llite: issue OST_SYNC for fsync()

The last parameter @datasync of fsync() has following indication:
* if datasync=0, we'd always flush data and metadata
* if datasync=1, we'd always flush data while does not flush modifed
  metadata unless that metadata is needed in order to allow a
  subsequent data retrieval to be correctly handled. For example, a
  change to the file size would require a metadata flush.

Lustre client can not tell the difference easily, and would issue
MDS_SYNC and OST_SYNC in all cases.

Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Reviewed-on: http://review.whamcloud.com/8684
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4388
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c
index c991ea5673bc..872c878e3b8f 100644
--- a/drivers/staging/lustre/lustre/llite/file.c
+++ b/drivers/staging/lustre/lustre/llite/file.c
@@ -2653,7 +2653,7 @@ int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	if (!err)
 		ptlrpc_req_finished(req);
 
-	if (datasync && S_ISREG(inode->i_mode)) {
+	if (S_ISREG(inode->i_mode)) {
 		struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
 
 		err = cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,