diff options
| author | Hannes Reinecke <hare@suse.de> | 2009-08-20 15:10:57 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-09-05 09:42:39 -0500 |
| commit | 523eeac6703a995d58918aaf321f128f75c13108 (patch) | |
| tree | b9d0ffa377b5d41144961709d94b10415f610e19 /drivers/scsi | |
| parent | ac280b670e6d6666667aba02324e2fc50bd96ae7 (diff) | |
| download | linux-523eeac6703a995d58918aaf321f128f75c13108.tar.gz | |
[SCSI] iscsi_tcp: Evaluate socket state in data_ready()
The network core will call the state_change() callback prior to the data_ready() callback, which might cause us to lose a connection state change. So we have to evaluate the socket state at the end of the data_ready() callback, too. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/iscsi_tcp.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 518dbd91df85..c7e2ff24ee9e 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -99,6 +99,24 @@ static int iscsi_sw_tcp_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, return total_consumed; } +/** + * iscsi_sw_sk_state_check - check socket state + * @sk: socket + * + * If the socket is in CLOSE or CLOSE_WAIT we should + * not close the connection if there is still some + * data pending. + */ +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; + + return 0; +} + static void iscsi_sw_tcp_data_ready(struct sock *sk, int flag) { struct iscsi_conn *conn = sk->sk_user_data; @@ -117,6 +135,12 @@ 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); + } + read_unlock(&sk->sk_callback_lock); /* If we had to (atomically) map a highmem page, @@ -137,9 +161,7 @@ static void iscsi_sw_tcp_state_change(struct sock *sk) conn = (struct iscsi_conn*)sk->sk_user_data; session = conn->session; - if ((sk->sk_state == TCP_CLOSE_WAIT || - sk->sk_state == TCP_CLOSE) && - !atomic_read(&sk->sk_rmem_alloc)) { + 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); |