summaryrefslogtreecommitdiffstats
path: root/fs/ceph/messenger.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ceph/messenger.c')
-rw-r--r--fs/ceph/messenger.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/ceph/messenger.c b/fs/ceph/messenger.c
index cdaaa13..509f57d 100644
--- a/fs/ceph/messenger.c
+++ b/fs/ceph/messenger.c
@@ -1334,6 +1334,7 @@ static int read_partial_message(struct ceph_connection *con)
unsigned front_len, middle_len, data_len, data_off;
int datacrc = con->msgr->nocrc;
int skip;
+ u64 seq;
dout("read_partial_message con %p msg %p\n", con, m);
@@ -1368,6 +1369,25 @@ static int read_partial_message(struct ceph_connection *con)
return -EIO;
data_off = le16_to_cpu(con->in_hdr.data_off);
+ /* verify seq# */
+ seq = le64_to_cpu(con->in_hdr.seq);
+ if ((s64)seq - (s64)con->in_seq < 1) {
+ pr_info("skipping %s%lld %s seq %lld, expected %lld\n",
+ ENTITY_NAME(con->peer_name),
+ 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);
+ con->in_tag = CEPH_MSGR_TAG_READY;
+ con->in_seq++;
+ return 0;
+ } else if ((s64)seq - (s64)con->in_seq > 1) {
+ pr_err("read_partial_message bad seq %lld expected %lld\n",
+ seq, con->in_seq + 1);
+ con->error_msg = "bad message sequence # for incoming message";
+ return -EBADMSG;
+ }
+
/* allocate message? */
if (!con->in_msg) {
dout("got hdr type %d front %d data %d\n", con->in_hdr.type,
@@ -1379,6 +1399,7 @@ static int read_partial_message(struct ceph_connection *con)
con->in_base_pos = -front_len - middle_len - data_len -
sizeof(m->footer);
con->in_tag = CEPH_MSGR_TAG_READY;
+ con->in_seq++;
return 0;
}
if (IS_ERR(con->in_msg)) {
@@ -2030,6 +2051,7 @@ void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg)
ceph_msg_put(con->in_msg);
con->in_msg = NULL;
con->in_tag = CEPH_MSGR_TAG_READY;
+ con->in_seq++;
} else {
dout("con_revoke_pages %p msg %p pages %p no-op\n",
con, con->in_msg, msg);
OpenPOWER on IntegriCloud