[PATCH net-next 06/13] net/smc: final part of add link processing as SMC server

Karsten Graul
2020-05-02T12:36:17Z

This patch finalizes the ADD_LINK processing of new links. Send the
CONFIRM_LINK request to the peer, receive the response and set link
state to ACTIVE.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
---
net/smc/smc_llc.c | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index e1d61b6b083b..20ce29b88b50 100644
--- a/net/smc/smc_llc.c
+++ b/net/smc/smc_llc.c
@@ -904,6 +904,33 @@ static int smc_llc_srv_rkey_exchange(struct smc_link *link,
return rc;
}

+static int smc_llc_srv_conf_link(struct smc_link *link,
+ struct smc_link *link_new,
+ enum smc_lgr_type lgr_new_t)
+{
+ struct smc_link_group *lgr = link->lgr;
+ struct smc_llc_qentry *qentry = NULL;
+ int rc;
+
+ /* send CONFIRM LINK request over the RoCE fabric */
+ rc = smc_llc_send_confirm_link(link_new, SMC_LLC_REQ);
+ if (rc)
+ return -ENOLINK;
+ /* receive CONFIRM LINK response over the RoCE fabric */
+ qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME,
+ SMC_LLC_CONFIRM_LINK);
+ if (!qentry) {
+ /* send DELETE LINK */
+ smc_llc_send_delete_link(link, link_new->link_id, SMC_LLC_REQ,
+ false, SMC_LLC_DEL_LOST_PATH);
+ return -ENOLINK;
+ }
+ smc_llc_link_active(link_new);
+ lgr->type = lgr_new_t;
+ smc_llc_flow_qentry_del(&lgr->llc_flow_lcl);
+ return 0;
+}
+
int smc_llc_srv_add_link(struct smc_link *link)
{
enum smc_lgr_type lgr_new_t = SMC_LGR_SYMMETRIC;
@@ -967,7 +994,7 @@ int smc_llc_srv_add_link(struct smc_link *link)
rc = smc_llc_srv_rkey_exchange(link, link_new);
if (rc)
goto out_err;
- /* tbd: rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t); */
+ rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t);
if (rc)
goto out_err;
return 0;
--
2.17.1