This is a note to let you know that I've just added the patch titled
ceph: messenger: use read_partial() in read_partial_message()
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
0007-ceph-messenger-use-read_partial-in-read_partial_mess.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 01cfe16230deeb4f97854f80212d9c25305b2311 Mon Sep 17 00:00:00 2001
From: Alex Elder <[email protected]>
Date: Thu, 10 May 2012 10:29:50 -0500
Subject: ceph: messenger: use read_partial() in read_partial_message()
From: Alex Elder <[email protected]>
(cherry picked from commit 57dac9d1620942608306d8c17c98a9d1568ffdf4)
There are two blocks of code in read_partial_message()--those that
read the header and footer of the message--that can be replaced by a
call to read_partial(). Do that.
Signed-off-by: Alex Elder <[email protected]>
Reviewed-by: Sage Weil <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/ceph/messenger.c | 30 ++++++++++--------------------
1 file changed, 10 insertions(+), 20 deletions(-)
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1628,7 +1628,7 @@ static int read_partial_message(struct c
{
struct ceph_msg *m = con->in_msg;
int ret;
- int to, left;
+ int to;
unsigned front_len, middle_len, data_len;
bool do_datacrc = !con->msgr->nocrc;
int skip;
@@ -1638,15 +1638,10 @@ static int read_partial_message(struct c
dout("read_partial_message con %p msg %p\n", con, m);
/* header */
- while (con->in_base_pos < sizeof(con->in_hdr)) {
- left = sizeof(con->in_hdr) - con->in_base_pos;
- ret = ceph_tcp_recvmsg(con->sock,
- (char *)&con->in_hdr + con->in_base_pos,
- left);
- if (ret <= 0)
- return ret;
- con->in_base_pos += ret;
- }
+ to = 0;
+ ret = read_partial(con, &to, sizeof (con->in_hdr), &con->in_hdr);
+ if (ret <= 0)
+ return ret;
crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc));
if (cpu_to_le32(crc) != con->in_hdr.crc) {
@@ -1759,16 +1754,11 @@ static int read_partial_message(struct c
}
/* footer */
- to = sizeof(m->hdr) + sizeof(m->footer);
- while (con->in_base_pos < to) {
- left = to - con->in_base_pos;
- ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer +
- (con->in_base_pos - sizeof(m->hdr)),
- left);
- if (ret <= 0)
- return ret;
- con->in_base_pos += ret;
- }
+ to = sizeof (m->hdr);
+ ret = read_partial(con, &to, sizeof (m->footer), &m->footer);
+ if (ret <= 0)
+ return ret;
+
dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n",
m, front_len, m->footer.front_crc, middle_len,
m->footer.middle_crc, data_len, m->footer.data_crc);
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/0005-crush-fix-memory-leak-when-destroying-tree-buckets.patch
queue-3.4/0002-crush-adjust-local-retry-threshold.patch
queue-3.4/0003-crush-be-more-tolerant-of-nonsensical-crush-maps.patch
queue-3.4/0001-crush-clean-up-types-const-ness.patch
queue-3.4/0008-ceph-messenger-update-to-in-read_partial-caller.patch
queue-3.4/0007-ceph-messenger-use-read_partial-in-read_partial_mess.patch
queue-3.4/0004-crush-fix-tree-node-weight-lookup.patch
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