In the 2.0-865 version when we received a ISCSI_ASYNC_MSG_REQUEST_LOGOUT we
would
logout, and then retry logging back in:
- <28>Jul 28 20:15:40 iscsid: Target requests logout within 3 seconds for
connection^M
- <28>Jul 28 20:15:45 iscsid: connection5:0 is operational after recovery (2
attempts)^M
And we would have a short hiccup (5 seconds) of the connection being gone.
This as my understanding was a mechanism for the EqualLogic box to "move"
(re-establishing
allegiance) a session to a different port, hence allowing a load-balancing
mechanism.
In 2.0-869, the git commit 052d014485d2ce5bb7fa8dd0df875dafd1db77df changed this
behavior so that we now actually logout and delete the session. No more retries.
2.0-865:
static int iscsi_xmit_mtask(struct iscsi_conn *conn)
{
struct iscsi_hdr *hdr = conn->mtask->hdr;
int rc, was_logout = 0;
spin_unlock_bh(&conn->session->lock);
if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) {
conn->session->state = ISCSI_STATE_IN_RECOVERY;
iscsi_block_session(session_to_cls(conn->session));
...
2.0-869:
static int iscsi_xmit_mtask(struct iscsi_conn *conn)
{
struct iscsi_hdr *hdr = conn->mtask->hdr;
int rc;
if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT)
conn->session->state = ISCSI_STATE_LOGGING_OUT;
spin_unlock_bh(&conn->session->lock);
.. and..
if (conn->session->state == ISCSI_STATE_LOGGING_OUT) {
iscsi_free_mgmt_task(conn, conn->mtask);
conn->mtask = NULL;
continue;
}
This comes down to 2.0-869 terminating the session without trying to re-login.
With the EqualLogic boxes that means we never reconnect back.
So.. my question is : was this change intentional?
If so, does Equallogic know this and have they changed their firmware to
send ISCSI_ASYNC_MSG_DROPPING_CONNECTION (0x02) instead back?
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