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authorIlya Dryomov <idryomov@gmail.com>2016-02-19 11:38:57 +0100
committerIlya Dryomov <idryomov@gmail.com>2016-02-24 20:28:40 +0100
commitdbc0d3caff5b7591e0cf8e34ca686ca6f4479ee1 (patch)
tree50f8370c3f3fab15957fddcca32ace6707cb0f82 /net/ceph/messenger.c
parentlibceph: don't bail early from try_read() when skipping a message (diff)
downloadlinux-dbc0d3caff5b7591e0cf8e34ca686ca6f4479ee1.tar.xz
linux-dbc0d3caff5b7591e0cf8e34ca686ca6f4479ee1.zip
libceph: use the right footer size when skipping a message
ceph_msg_footer is 21 bytes long, while ceph_msg_footer_old is only 13. Don't skip too much when CEPH_FEATURE_MSG_AUTH isn't negotiated. Cc: stable@vger.kernel.org # 3.19+ Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'net/ceph/messenger.c')
-rw-r--r--net/ceph/messenger.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index fec20819a5ea..9382619a405b 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1197,6 +1197,13 @@ static bool ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor,
return new_piece;
}
+static size_t sizeof_footer(struct ceph_connection *con)
+{
+ return (con->peer_features & CEPH_FEATURE_MSG_AUTH) ?
+ sizeof(struct ceph_msg_footer) :
+ sizeof(struct ceph_msg_footer_old);
+}
+
static void prepare_message_data(struct ceph_msg *msg, u32 data_len)
{
BUG_ON(!msg);
@@ -2335,7 +2342,7 @@ static int read_partial_message(struct ceph_connection *con)
ceph_pr_addr(&con->peer_addr.in_addr),
seq, con->in_seq + 1);
con->in_base_pos = -front_len - middle_len - data_len -
- sizeof(m->footer);
+ sizeof_footer(con);
con->in_tag = CEPH_MSGR_TAG_READY;
return 1;
} else if ((s64)seq - (s64)con->in_seq > 1) {
@@ -2360,7 +2367,7 @@ static int read_partial_message(struct ceph_connection *con)
/* skip this message */
dout("alloc_msg said skip message\n");
con->in_base_pos = -front_len - middle_len - data_len -
- sizeof(m->footer);
+ sizeof_footer(con);
con->in_tag = CEPH_MSGR_TAG_READY;
con->in_seq++;
return 1;