提交 98ad5ebd 编写于 作者: I Ilya Dryomov

libceph: ceph_connection_operations::reencode_message() method

Give upper layers a chance to reencode the message after the connection
is negotiated and ->peer_features is set.  OSD client will use this to
support both luminous and pre-luminous OSDs (in a single cluster): the
former need MOSDOp v8; the latter will continue to be sent MOSDOp v4.
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
上级 2e59ffd1
......@@ -44,6 +44,8 @@ struct ceph_connection_operations {
struct ceph_msg_header *hdr,
int *skip);
void (*reencode_message) (struct ceph_msg *msg);
int (*sign_message) (struct ceph_msg *msg);
int (*check_message_signature) (struct ceph_msg *msg);
};
......
......@@ -1288,13 +1288,16 @@ static void prepare_write_message(struct ceph_connection *con)
m->hdr.seq = cpu_to_le64(++con->out_seq);
m->needs_out_seq = false;
}
WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len));
if (con->ops->reencode_message)
con->ops->reencode_message(m);
dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n",
m, con->out_seq, le16_to_cpu(m->hdr.type),
le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len),
m->data_length);
BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len);
WARN_ON(m->front.iov_len != le32_to_cpu(m->hdr.front_len));
WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len));
/* tag + hdr + front + middle */
con_out_kvec_add(con, sizeof (tag_msg), &tag_msg);
......
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