[PATCH net-next 06/13] net/smc: multi-link support for smc_rmb_rtoken_handling()

[Karsten Graul]

Extend smc_rmb_rtoken_handling() and smc_rtoken_delete() to support
multiple links.

Signed-off-by: Karsten Graul <kgr...@linux.ibm.com>
Reviewed-by: Ursula Braun <ubr...@linux.ibm.com>
---
 net/smc/af_smc.c   |  4 ++--
 net/smc/smc_core.c | 14 ++++++++------
 net/smc/smc_core.h |  2 +-
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 890dc6422f8c..e39f6aedd3bd 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -640,7 +640,7 @@ static int smc_connect_rdma(struct smc_sock *smc,
        if (ini->cln_first_contact == SMC_FIRST_CONTACT)
                smc_link_save_peer_info(link, aclc);
 
-       if (smc_rmb_rtoken_handling(&smc->conn, aclc))
+       if (smc_rmb_rtoken_handling(&smc->conn, link, aclc))
                return smc_connect_abort(smc, SMC_CLC_DECL_ERR_RTOK,
                                         ini->cln_first_contact);
 
@@ -1231,7 +1231,7 @@ static int smc_listen_rdma_finish(struct smc_sock 
*new_smc,
        if (local_contact == SMC_FIRST_CONTACT)
                smc_link_save_peer_info(link, cclc);
 
-       if (smc_rmb_rtoken_handling(&new_smc->conn, cclc)) {
+       if (smc_rmb_rtoken_handling(&new_smc->conn, link, cclc)) {
                reason_code = SMC_CLC_DECL_ERR_RTOK;
                goto decline;
        }
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 5df3f8f41d19..e8897d60b27f 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -1392,19 +1392,20 @@ int smc_rtoken_add(struct smc_link *lnk, __be64 
nw_vaddr, __be32 nw_rkey)
        return i;
 }
 
-/* delete an rtoken */
+/* delete an rtoken from all links */
 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey)
 {
        struct smc_link_group *lgr = smc_get_lgr(lnk);
        u32 rkey = ntohl(nw_rkey);
-       int i;
+       int i, j;
 
        for (i = 0; i < SMC_RMBS_PER_LGR_MAX; i++) {
                if (lgr->rtokens[i][lnk->link_idx].rkey == rkey &&
                    test_bit(i, lgr->rtokens_used_mask)) {
-                       lgr->rtokens[i][lnk->link_idx].rkey = 0;
-                       lgr->rtokens[i][lnk->link_idx].dma_addr = 0;
-
+                       for (j = 0; j < SMC_LINKS_PER_LGR_MAX; j++) {
+                               lgr->rtokens[i][j].rkey = 0;
+                               lgr->rtokens[i][j].dma_addr = 0;
+                       }
                        clear_bit(i, lgr->rtokens_used_mask);
                        return 0;
                }
@@ -1414,9 +1415,10 @@ int smc_rtoken_delete(struct smc_link *lnk, __be32 
nw_rkey)
 
 /* save rkey and dma_addr received from peer during clc handshake */
 int smc_rmb_rtoken_handling(struct smc_connection *conn,
+                           struct smc_link *lnk,
                            struct smc_clc_msg_accept_confirm *clc)
 {
-       conn->rtoken_idx = smc_rtoken_add(conn->lnk, clc->rmb_dma_addr,
+       conn->rtoken_idx = smc_rtoken_add(lnk, clc->rmb_dma_addr,
                                          clc->rmb_rkey);
        if (conn->rtoken_idx < 0)
                return conn->rtoken_idx;
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h
index 66753ba23bc6..f68ba187ecf8 100644
--- a/net/smc/smc_core.h
+++ b/net/smc/smc_core.h
@@ -309,7 +309,7 @@ void smc_smcd_terminate_all(struct smcd_dev *dev);
 void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
 int smc_buf_create(struct smc_sock *smc, bool is_smcd);
 int smc_uncompress_bufsize(u8 compressed);
-int smc_rmb_rtoken_handling(struct smc_connection *conn,
+int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
                            struct smc_clc_msg_accept_confirm *clc);
 int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
-- 
2.17.1