[3.19.y-ckt stable] Patch "ceph: fix request time stamp encoding" has been added to the 3.19.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ceph: fix request time stamp encoding

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt18.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 47d88aaadd2ca617823b4460cf7fd550412583ab Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zyan at redhat.com>
Date: Tue, 13 Jan 2015 15:20:52 +0800
Subject: ceph: fix request time stamp encoding

commit 1f041a89b4f22cf2e701514f4b8f73a8b1e06a3e upstream.

struct timespec uses 'long' to present second and nanosecond. 'long'
is 64 bits on 64bits machine. ceph MDS expects time stamp to be
encoded as struct ceph_timespec, which uses 'u32' to present second
and nanosecond.

Signed-off-by: Yan, Zheng <zyan at redhat.com>
BugLink: http://tracker.ceph.com/issues/15302
BugLink: http://bugs.launchpad.net/bugs/1564950
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 fs/ceph/mds_client.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 611aa90..15e4b4f 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1923,7 +1923,11 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 	head->num_releases = cpu_to_le16(releases);

 	/* time stamp */
-	ceph_encode_copy(&p, &req->r_stamp, sizeof(req->r_stamp));
+	{
+		struct ceph_timespec ts;
+		ceph_encode_timespec(&ts, &req->r_stamp);
+		ceph_encode_copy(&p, &ts, sizeof(ts));
+	}

 	BUG_ON(p > end);
 	msg->front.iov_len = p - msg->front.iov_base;
@@ -2012,7 +2016,11 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc,

 		/* time stamp */
 		p = msg->front.iov_base + req->r_request_release_offset;
-		ceph_encode_copy(&p, &req->r_stamp, sizeof(req->r_stamp));
+		{
+			struct ceph_timespec ts;
+			ceph_encode_timespec(&ts, &req->r_stamp);
+			ceph_encode_copy(&p, &ts, sizeof(ts));
+		}

 		msg->front.iov_len = p - msg->front.iov_base;
 		msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
--
2.7.4