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authorMike Christie <michaelc@cs.wisc.edu>2007-05-30 12:57:24 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-06-02 15:37:19 -0400
commit2223696192c687f2853e42b7c1e0d3ef002081fd (patch)
tree9eef082af7f3286781134226bfc98ec401d41e79 /drivers/scsi/iscsi_tcp.c
parent4e7aba73f9f6e9fe6d3fa10d3fd63cd4882ba3d0 (diff)
downloadblackbird-op-linux-2223696192c687f2853e42b7c1e0d3ef002081fd.tar.gz
blackbird-op-linux-2223696192c687f2853e42b7c1e0d3ef002081fd.zip
[SCSI] iscsi class, qla4xxx, iscsi_tcp: export local address
This patch exports the local address for the session. For qla4xxx this is the ip of the hba's port. For software this is the src addr of the socket. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: David C Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.c')
-rw-r--r--drivers/scsi/iscsi_tcp.c127
1 files changed, 98 insertions, 29 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 7ce177e30a53..da66fb524b5b 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -1870,18 +1870,22 @@ tcp_conn_alloc_fail:
static void
iscsi_tcp_release_conn(struct iscsi_conn *conn)
{
+ struct iscsi_session *session = conn->session;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+ struct socket *sock = tcp_conn->sock;
- if (!tcp_conn->sock)
+ if (!sock)
return;
- sock_hold(tcp_conn->sock->sk);
+ sock_hold(sock->sk);
iscsi_conn_restore_callbacks(tcp_conn);
- sock_put(tcp_conn->sock->sk);
+ sock_put(sock->sk);
- sockfd_put(tcp_conn->sock);
+ spin_lock_bh(&session->lock);
tcp_conn->sock = NULL;
conn->recv_lock = NULL;
+ spin_unlock_bh(&session->lock);
+ sockfd_put(sock);
}
static void
@@ -1912,6 +1916,46 @@ iscsi_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
tcp_conn->hdr_size = sizeof(struct iscsi_hdr);
}
+static int iscsi_tcp_get_addr(struct iscsi_conn *conn, struct socket *sock,
+ char *buf, int *port,
+ int (*getname)(struct socket *, struct sockaddr *,
+ int *addrlen))
+{
+ struct sockaddr_storage *addr;
+ struct sockaddr_in6 *sin6;
+ struct sockaddr_in *sin;
+ int rc = 0, len;
+
+ addr = kmalloc(GFP_KERNEL, sizeof(*addr));
+ if (!addr)
+ return -ENOMEM;
+
+ if (getname(sock, (struct sockaddr *) addr, &len)) {
+ rc = -ENODEV;
+ goto free_addr;
+ }
+
+ switch (addr->ss_family) {
+ case AF_INET:
+ sin = (struct sockaddr_in *)addr;
+ spin_lock_bh(&conn->session->lock);
+ sprintf(buf, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
+ *port = be16_to_cpu(sin->sin_port);
+ spin_unlock_bh(&conn->session->lock);
+ break;
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *)addr;
+ spin_lock_bh(&conn->session->lock);
+ sprintf(buf, NIP6_FMT, NIP6(sin6->sin6_addr));
+ *port = be16_to_cpu(sin6->sin6_port);
+ spin_unlock_bh(&conn->session->lock);
+ break;
+ }
+free_addr:
+ kfree(addr);
+ return rc;
+}
+
static int
iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,
@@ -1929,10 +1973,24 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
printk(KERN_ERR "iscsi_tcp: sockfd_lookup failed %d\n", err);
return -EEXIST;
}
+ /*
+ * copy these values now because if we drop the session
+ * userspace may still want to query the values since we will
+ * be using them for the reconnect
+ */
+ err = iscsi_tcp_get_addr(conn, sock, conn->portal_address,
+ &conn->portal_port, kernel_getpeername);
+ if (err)
+ goto free_socket;
+
+ err = iscsi_tcp_get_addr(conn, sock, conn->local_address,
+ &conn->local_port, kernel_getsockname);
+ if (err)
+ goto free_socket;
err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
if (err)
- return err;
+ goto free_socket;
/* bind iSCSI connection and socket */
tcp_conn->sock = sock;
@@ -1956,8 +2014,11 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
* set receive state machine into initial state
*/
tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
-
return 0;
+
+free_socket:
+ sockfd_put(sock);
+ return err;
}
/* called with host lock */
@@ -2077,33 +2138,18 @@ iscsi_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf)
{
struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct inet_sock *inet;
- struct ipv6_pinfo *np;
- struct sock *sk;
int len;
switch(param) {
case ISCSI_PARAM_CONN_PORT:
- if (!tcp_conn->sock)
- return -EINVAL;
-
- inet = inet_sk(tcp_conn->sock->sk);
- len = sprintf(buf, "%hu\n", be16_to_cpu(inet->dport));
+ spin_lock_bh(&conn->session->lock);
+ len = sprintf(buf, "%hu\n", conn->portal_port);
+ spin_unlock_bh(&conn->session->lock);
break;
case ISCSI_PARAM_CONN_ADDRESS:
- if (!tcp_conn->sock)
- return -EINVAL;
-
- sk = tcp_conn->sock->sk;
- if (sk->sk_family == PF_INET) {
- inet = inet_sk(sk);
- len = sprintf(buf, NIPQUAD_FMT "\n",
- NIPQUAD(inet->daddr));
- } else {
- np = inet6_sk(sk);
- len = sprintf(buf, NIP6_FMT "\n", NIP6(np->daddr));
- }
+ spin_lock_bh(&conn->session->lock);
+ len = sprintf(buf, "%s\n", conn->portal_address);
+ spin_unlock_bh(&conn->session->lock);
break;
default:
return iscsi_conn_get_param(cls_conn, param, buf);
@@ -2112,6 +2158,29 @@ iscsi_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn,
return len;
}
+static int
+iscsi_tcp_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
+ char *buf)
+{
+ struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ int len;
+
+ switch (param) {
+ case ISCSI_HOST_PARAM_IPADDRESS:
+ spin_lock_bh(&session->lock);
+ if (!session->leadconn)
+ len = -ENODEV;
+ else
+ len = sprintf(buf, "%s\n",
+ session->leadconn->local_address);
+ spin_unlock_bh(&session->lock);
+ break;
+ default:
+ return iscsi_host_get_param(shost, param, buf);
+ }
+ return len;
+}
+
static void
iscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats)
{
@@ -2233,7 +2302,7 @@ static struct iscsi_transport iscsi_tcp_transport = {
ISCSI_TARGET_NAME | ISCSI_TPGT |
ISCSI_USERNAME | ISCSI_PASSWORD |
ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN,
- .host_param_mask = ISCSI_HOST_HWADDRESS |
+ .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
ISCSI_HOST_INITIATOR_NAME,
.host_template = &iscsi_sht,
.conndata_size = sizeof(struct iscsi_conn),
@@ -2252,7 +2321,7 @@ static struct iscsi_transport iscsi_tcp_transport = {
.start_conn = iscsi_conn_start,
.stop_conn = iscsi_tcp_conn_stop,
/* iscsi host params */
- .get_host_param = iscsi_host_get_param,
+ .get_host_param = iscsi_tcp_host_get_param,
.set_host_param = iscsi_host_set_param,
/* IO */
.send_pdu = iscsi_conn_send_pdu,
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