/* create a portal, after listening starts all events
* are received in isert_cm_evt_handler()
*/
struct isert_portal *isert_portal_create(void)
{
struct isert_portal *portal;
struct rdma_cm_id *cm_id;
int err;
if (unlikely(!try_module_get(THIS_MODULE))) {
pr_err("Unable increment module reference\n");
portal = ERR_PTR(-EINVAL);
goto out;
}
portal = kzalloc(sizeof(*portal), GFP_KERNEL);
if (unlikely(!portal)) {
pr_err("Unable to allocate struct portal\n");
portal = ERR_PTR(-ENOMEM);
goto err_alloc;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 0, 0) && \
(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
cm_id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP);
#else
cm_id = rdma_create_id(isert_cm_evt_handler, portal, RDMA_PS_TCP,
IB_QPT_RC);
#endif
if (unlikely(IS_ERR(cm_id))) {
err = PTR_ERR(cm_id);
pr_err("Failed to create rdma id, err:%d\n", err);
goto create_id_err;
}
portal->cm_id = cm_id;
INIT_LIST_HEAD(&portal->conn_list);
isert_portal_list_add(portal);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
rdma_set_afonly(cm_id, 1);
#endif
pr_info("Created iser portal cm_id:%p\n", cm_id);
out:
return portal;
create_id_err:
kfree(portal);
portal = ERR_PTR(err);
err_alloc:
module_put(THIS_MODULE);
goto out;
}
/*
* Create a listening RDMA service endpoint.
*/
static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
struct net *net,
struct sockaddr *sa, int salen,
int flags)
{
struct rdma_cm_id *listen_id;
struct svcxprt_rdma *cma_xprt;
int ret;
dprintk("svcrdma: Creating RDMA socket\n");
if ((sa->sa_family != AF_INET) && (sa->sa_family != AF_INET6)) {
dprintk("svcrdma: Address family %d is not supported.\n", sa->sa_family);
return ERR_PTR(-EAFNOSUPPORT);
}
cma_xprt = rdma_create_xprt(serv, 1);
if (!cma_xprt)
return ERR_PTR(-ENOMEM);
listen_id = rdma_create_id(&init_net, rdma_listen_handler, cma_xprt,
RDMA_PS_TCP, IB_QPT_RC);
if (IS_ERR(listen_id)) {
ret = PTR_ERR(listen_id);
dprintk("svcrdma: rdma_create_id failed = %d\n", ret);
goto err0;
}
/* Allow both IPv4 and IPv6 sockets to bind a single port
* at the same time.
*/
#if IS_ENABLED(CONFIG_IPV6)
ret = rdma_set_afonly(listen_id, 1);
if (ret) {
dprintk("svcrdma: rdma_set_afonly failed = %d\n", ret);
goto err1;
}
#endif
ret = rdma_bind_addr(listen_id, sa);
if (ret) {
dprintk("svcrdma: rdma_bind_addr failed = %d\n", ret);
goto err1;
}
cma_xprt->sc_cm_id = listen_id;
ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG);
if (ret) {
dprintk("svcrdma: rdma_listen failed = %d\n", ret);
goto err1;
}
/*
* We need to use the address from the cm_id in case the
* caller specified 0 for the port number.
*/
sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr;
svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen);
return &cma_xprt->sc_xprt;
err1:
rdma_destroy_id(listen_id);
err0:
kfree(cma_xprt);
return ERR_PTR(ret);
}