#include "smc.h"
#include "smc_clc.h"
+#include "smc_core.h"
#include "smc_ib.h"
#include "smc_pnet.h"
+static DEFINE_MUTEX(smc_create_lgr_pending); /* serialize link group
+ * creation
+ */
+
+struct smc_lgr_list smc_lgr_list = { /* established link groups */
+ .lock = __SPIN_LOCK_UNLOCKED(smc_lgr_list.lock),
+ .list = LIST_HEAD_INIT(smc_lgr_list.list),
+};
+
static void smc_tcp_listen_work(struct work_struct *);
static void smc_set_keepalive(struct sock *sk, int val)
return rc;
}
+static void smc_conn_save_peer_info(struct smc_sock *smc,
+ struct smc_clc_msg_accept_confirm *clc)
+{
+ smc->conn.peer_conn_idx = clc->conn_idx;
+}
+
+static void smc_link_save_peer_info(struct smc_link *link,
+ struct smc_clc_msg_accept_confirm *clc)
+{
+ link->peer_qpn = ntoh24(clc->qpn);
+ memcpy(link->peer_gid, clc->lcl.gid, SMC_GID_SIZE);
+ memcpy(link->peer_mac, clc->lcl.mac, sizeof(link->peer_mac));
+ link->peer_psn = ntoh24(clc->psn);
+ link->peer_mtu = clc->qp_mtu;
+}
+
/* setup for RDMA connection of client */
static int smc_connect_rdma(struct smc_sock *smc)
{
+ struct sockaddr_in *inaddr = (struct sockaddr_in *)smc->addr;
struct smc_clc_msg_accept_confirm aclc;
+ int local_contact = SMC_FIRST_CONTACT;
struct smc_ib_device *smcibdev;
+ struct smc_link *link;
+ u8 srv_first_contact;
int reason_code = 0;
int rc = 0;
u8 ibport;
if (reason_code > 0)
goto decline_rdma;
- /* tbd in follow-on patch: more steps to setup RDMA communcication,
- * create connection, link group, link
- */
+ srv_first_contact = aclc.hdr.flag;
+ mutex_lock(&smc_create_lgr_pending);
+ local_contact = smc_conn_create(smc, inaddr->sin_addr.s_addr, smcibdev,
+ ibport, &aclc.lcl, srv_first_contact);
+ if (local_contact < 0) {
+ rc = local_contact;
+ if (rc == -ENOMEM)
+ reason_code = SMC_CLC_DECL_MEM;/* insufficient memory*/
+ else if (rc == -ENOLINK)
+ reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */
+ goto decline_rdma_unlock;
+ }
+ link = &smc->conn.lgr->lnk[SMC_SINGLE_LINK];
+ smc_conn_save_peer_info(smc, &aclc);
+ if (local_contact == SMC_FIRST_CONTACT)
+ smc_link_save_peer_info(link, &aclc);
/* tbd in follow-on patch: more steps to setup RDMA communcication,
* create rmbs, map rmbs, rtoken_handling, modify_qp
*/
rc = smc_clc_send_confirm(smc);
if (rc)
- goto out_err;
+ goto out_err_unlock;
/* tbd in follow-on patch: llc_confirm */
+ mutex_unlock(&smc_create_lgr_pending);
out_connected:
smc_copy_sock_settings_to_clc(smc);
smc->sk.sk_state = SMC_ACTIVE;
- return rc;
+ return rc ? rc : local_contact;
+decline_rdma_unlock:
+ mutex_unlock(&smc_create_lgr_pending);
+ smc_conn_free(&smc->conn);
decline_rdma:
/* RDMA setup failed, switch back to TCP */
smc->use_fallback = true;
}
goto out_connected;
+out_err_unlock:
+ mutex_unlock(&smc_create_lgr_pending);
+ smc_conn_free(&smc->conn);
out_err:
return rc;
}
struct socket *newclcsock = new_smc->clcsock;
struct smc_sock *lsmc = new_smc->listen_smc;
struct smc_clc_msg_accept_confirm cclc;
+ int local_contact = SMC_REUSE_CONTACT;
struct sock *newsmcsk = &new_smc->sk;
struct smc_clc_msg_proposal pclc;
struct smc_ib_device *smcibdev;
struct sockaddr_in peeraddr;
+ struct smc_link *link;
int reason_code = 0;
int rc = 0, len;
__be32 subnet;
/* get address of the peer connected to the internal TCP socket */
kernel_getpeername(newclcsock, (struct sockaddr *)&peeraddr, &len);
- /* tbd in follow-on patch: more steps to setup RDMA communcication,
- * create connection, link_group, link
- */
+ /* allocate connection / link group */
+ mutex_lock(&smc_create_lgr_pending);
+ local_contact = smc_conn_create(new_smc, peeraddr.sin_addr.s_addr,
+ smcibdev, ibport, &pclc.lcl, 0);
+ if (local_contact == SMC_REUSE_CONTACT)
+ /* lock no longer needed, free it due to following
+ * smc_clc_wait_msg() call
+ */
+ mutex_unlock(&smc_create_lgr_pending);
+ if (local_contact < 0) {
+ rc = local_contact;
+ if (rc == -ENOMEM)
+ reason_code = SMC_CLC_DECL_MEM;/* insufficient memory*/
+ else if (rc == -ENOLINK)
+ reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */
+ goto decline_rdma;
+ }
+ link = &new_smc->conn.lgr->lnk[SMC_SINGLE_LINK];
/* tbd in follow-on patch: more steps to setup RDMA communcication,
* create rmbs, map rmbs
*/
- rc = smc_clc_send_accept(new_smc);
+ rc = smc_clc_send_accept(new_smc, local_contact);
if (rc)
goto out_err;
goto out_err;
if (reason_code > 0)
goto decline_rdma;
+ smc_conn_save_peer_info(new_smc, &cclc);
+ if (local_contact == SMC_FIRST_CONTACT)
+ smc_link_save_peer_info(link, &cclc);
/* tbd in follow-on patch: more steps to setup RDMA communcication,
* rtoken_handling, modify_qp
sk_refcnt_debug_inc(newsmcsk);
newsmcsk->sk_state = SMC_ACTIVE;
enqueue:
+ if (local_contact == SMC_FIRST_CONTACT)
+ mutex_unlock(&smc_create_lgr_pending);
lock_sock(&lsmc->sk);
if (lsmc->sk.sk_state == SMC_LISTEN) {
smc_accept_enqueue(&lsmc->sk, newsmcsk);
decline_rdma:
/* RDMA setup failed, switch back to TCP */
+ smc_conn_free(&new_smc->conn);
new_smc->use_fallback = true;
if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {
rc = smc_clc_send_decline(new_smc, reason_code, 0);
static void __exit smc_exit(void)
{
+ struct smc_link_group *lgr, *lg;
+ LIST_HEAD(lgr_freeing_list);
+
+ spin_lock_bh(&smc_lgr_list.lock);
+ if (!list_empty(&smc_lgr_list.list))
+ list_splice_init(&smc_lgr_list.list, &lgr_freeing_list);
+ spin_unlock_bh(&smc_lgr_list.lock);
+ list_for_each_entry_safe(lgr, lg, &lgr_freeing_list, list) {
+ list_del_init(&lgr->list);
+ smc_lgr_free(lgr); /* free link group */
+ }
smc_ib_unregister_client();
sock_unregister(PF_SMC);
proto_unregister(&smc_proto);
projects / linux.git / blobdiff