提交 73c3d481 编写于 作者: S Sage Weil 提交者: Ilya Dryomov

libceph: gracefully handle large reply messages from the mon

We preallocate a few of the message types we get back from the mon.  If we
get a larger message than we are expecting, fall back to trying to allocate
a new one instead of blindly using the one we have.

CC: stable@vger.kernel.org
Signed-off-by: NSage Weil <sage@redhat.com>
Reviewed-by: NIlya Dryomov <ilya.dryomov@inktank.com>
上级 255939e7
......@@ -1181,7 +1181,15 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
if (!m) {
pr_info("alloc_msg unknown type %d\n", type);
*skip = 1;
} else if (front_len > m->front_alloc_len) {
pr_warning("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n",
front_len, m->front_alloc_len,
(unsigned int)con->peer_name.type,
le64_to_cpu(con->peer_name.num));
ceph_msg_put(m);
m = ceph_msg_new(type, front_len, GFP_NOFS, false);
}
return m;
}
......
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