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[SCSI] iscsi_tcp: add new conn error to indicate tcp conn closed 

If a target closed the connection, we will detect it in the
state_changed or data_ready callout. This adds a new conn
error value to use for this problem, so it is not confused
with when the initiator throws a conn error and drops
the connection.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Mike Christie 2009-08-20 15:11:02 -05:00 committed by James Bottomley
parent 632248aab3
commit d1af8a3287
2 changed files with 10 additions and 14 deletions
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23
drivers/scsi/iscsi_tcp.c
View File

@ -109,11 +109,14 @@ static int iscsi_sw_tcp_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
*/
static inline int iscsi_sw_sk_state_check(struct sock *sk)
{
if ((sk->sk_state == TCP_CLOSE_WAIT ||
sk->sk_state == TCP_CLOSE) &&
!atomic_read(&sk->sk_rmem_alloc))
return -ECONNRESET;
struct iscsi_conn *conn = (struct iscsi_conn*)sk->sk_user_data;
if ((sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) &&
!atomic_read(&sk->sk_rmem_alloc)) {
ISCSI_SW_TCP_DBG(conn, "TCP_CLOSE|TCP_CLOSE_WAIT\n");
iscsi_conn_failure(conn, ISCSI_ERR_TCP_CONN_CLOSE);
return -ECONNRESET;
}
return 0;
}
@ -135,11 +138,7 @@ static void iscsi_sw_tcp_data_ready(struct sock *sk, int flag)
rd_desc.count = 1;
tcp_read_sock(sk, &rd_desc, iscsi_sw_tcp_recv);
if (iscsi_sw_sk_state_check(sk) < 0) {
ISCSI_SW_TCP_DBG(conn, "iscsi_tcp_data_ready: "
"TCP_CLOSE|TCP_CLOSE_WAIT\n");
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
}
iscsi_sw_sk_state_check(sk);
read_unlock(&sk->sk_callback_lock);
@ -161,11 +160,7 @@ static void iscsi_sw_tcp_state_change(struct sock *sk)
conn = (struct iscsi_conn*)sk->sk_user_data;
session = conn->session;
if (iscsi_sw_sk_state_check(sk) < 0) {
ISCSI_SW_TCP_DBG(conn, "iscsi_tcp_state_change: "
"TCP_CLOSE|TCP_CLOSE_WAIT\n");
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
}
iscsi_sw_sk_state_check(sk);
tcp_conn = conn->dd_data;
tcp_sw_conn = tcp_conn->dd_data;

1
include/scsi/iscsi_if.h
View File

@ -262,6 +262,7 @@ enum iscsi_err {
ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17,
ISCSI_ERR_INVALID_HOST = ISCSI_ERR_BASE + 18,
ISCSI_ERR_XMIT_FAILED = ISCSI_ERR_BASE + 19,
ISCSI_ERR_TCP_CONN_CLOSE = ISCSI_ERR_BASE + 20,
};
/*