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authorVarun Prakash <varun@chelsio.com>2016-04-20 00:00:11 +0530
committerNicholas Bellinger <nab@linux-iscsi.org>2016-05-09 23:12:07 -0700
commite8205cca0abd126418c18030fb8c9ef272080d70 (patch)
treea8743a88870cdd8e056c2b391d6f6b2e05694f3b /drivers/target
parent187e84f7c2e4fa0028241c253c24658ef658e5d3 (diff)
downloadlinux-e8205cca0abd126418c18030fb8c9ef272080d70.tar.bz2
iscsi-target: split iscsi_target_rx_thread()
split iscsi_target_rx_thread() into two parts, 1. iscsi_target_rx_thread() is common to all transport drivers, it will call Rx function registered by transport driver. 2. iscsit_get_rx_pdu() is Rx function for ISCSI_TCP transport. Signed-off-by: Varun Prakash <varun@chelsio.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target.c59
1 files changed, 33 insertions, 26 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 9fa9f0b3a0f4..a827b7afe42c 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -480,6 +480,7 @@ int iscsit_del_np(struct iscsi_np *np)
static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int);
static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int);
+static void iscsit_get_rx_pdu(struct iscsi_conn *);
static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
@@ -682,6 +683,7 @@ static struct iscsit_transport iscsi_target_transport = {
.iscsit_queue_status = iscsit_queue_rsp,
.iscsit_aborted_task = iscsit_aborted_task,
.iscsit_xmit_pdu = iscsit_xmit_pdu,
+ .iscsit_get_rx_pdu = iscsit_get_rx_pdu,
.iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops,
};
@@ -3931,30 +3933,12 @@ static bool iscsi_target_check_conn_state(struct iscsi_conn *conn)
return ret;
}
-int iscsi_target_rx_thread(void *arg)
+static void iscsit_get_rx_pdu(struct iscsi_conn *conn)
{
- int ret, rc;
+ int ret;
u8 buffer[ISCSI_HDR_LEN], opcode;
u32 checksum = 0, digest = 0;
- struct iscsi_conn *conn = arg;
struct kvec iov;
- /*
- * Allow ourselves to be interrupted by SIGINT so that a
- * connection recovery / failure event can be triggered externally.
- */
- allow_signal(SIGINT);
- /*
- * Wait for iscsi_post_login_handler() to complete before allowing
- * incoming iscsi/tcp socket I/O, and/or failing the connection.
- */
- rc = wait_for_completion_interruptible(&conn->rx_login_comp);
- if (rc < 0 || iscsi_target_check_conn_state(conn))
- return 0;
-
- if (conn->conn_transport->iscsit_get_rx_pdu) {
- conn->conn_transport->iscsit_get_rx_pdu(conn);
- goto transport_err;
- }
while (!kthread_should_stop()) {
/*
@@ -3972,7 +3956,7 @@ int iscsi_target_rx_thread(void *arg)
ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN);
if (ret != ISCSI_HDR_LEN) {
iscsit_rx_thread_wait_for_tcp(conn);
- goto transport_err;
+ return;
}
if (conn->conn_ops->HeaderDigest) {
@@ -3982,7 +3966,7 @@ int iscsi_target_rx_thread(void *arg)
ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN);
if (ret != ISCSI_CRC_LEN) {
iscsit_rx_thread_wait_for_tcp(conn);
- goto transport_err;
+ return;
}
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
@@ -4006,7 +3990,7 @@ int iscsi_target_rx_thread(void *arg)
}
if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)
- goto transport_err;
+ return;
opcode = buffer[0] & ISCSI_OPCODE_MASK;
@@ -4017,15 +4001,38 @@ int iscsi_target_rx_thread(void *arg)
" while in Discovery Session, rejecting.\n", opcode);
iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
buffer);
- goto transport_err;
+ return;
}
ret = iscsi_target_rx_opcode(conn, buffer);
if (ret < 0)
- goto transport_err;
+ return;
}
+}
+
+int iscsi_target_rx_thread(void *arg)
+{
+ int rc;
+ struct iscsi_conn *conn = arg;
+
+ /*
+ * Allow ourselves to be interrupted by SIGINT so that a
+ * connection recovery / failure event can be triggered externally.
+ */
+ allow_signal(SIGINT);
+ /*
+ * Wait for iscsi_post_login_handler() to complete before allowing
+ * incoming iscsi/tcp socket I/O, and/or failing the connection.
+ */
+ rc = wait_for_completion_interruptible(&conn->rx_login_comp);
+ if (rc < 0 || iscsi_target_check_conn_state(conn))
+ return 0;
+
+ if (!conn->conn_transport->iscsit_get_rx_pdu)
+ return 0;
+
+ conn->conn_transport->iscsit_get_rx_pdu(conn);
-transport_err:
if (!signal_pending(current))
atomic_set(&conn->transport_failed, 1);
iscsit_take_action_for_connection_exit(conn);