From 64513d269e8971aabb7e787955a1b320e3031306 Mon Sep 17 00:00:00 2001 From: Guvenc Gulce Date: Mon, 9 Aug 2021 11:05:57 +0200 Subject: [PATCH] net/smc: Correct smc link connection counter in case of smc client SMC clients may be assigned to a different link after the initial connection between two peers was established. In such a case, the connection counter was not correctly set. Update the connection counter correctly when a smc client connection is assigned to a different smc link. Fixes: 07d51580ff65 ("net/smc: Add connection counters for links") Signed-off-by: Guvenc Gulce Tested-by: Karsten Graul Signed-off-by: David S. Miller --- net/smc/af_smc.c | 2 +- net/smc/smc_core.c | 4 ++-- net/smc/smc_core.h | 2 ++ 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 898389611ae8..c038efc23ce3 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -795,7 +795,7 @@ static int smc_connect_rdma(struct smc_sock *smc, reason_code = SMC_CLC_DECL_NOSRVLINK; goto connect_abort; } - smc->conn.lnk = link; + smc_switch_link_and_count(&smc->conn, link); } /* create send buffer and rmb */ diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index cd0d7c908b2a..c160ff50c053 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -917,8 +917,8 @@ static int smc_switch_cursor(struct smc_sock *smc, struct smc_cdc_tx_pend *pend, return rc; } -static void smc_switch_link_and_count(struct smc_connection *conn, - struct smc_link *to_lnk) +void smc_switch_link_and_count(struct smc_connection *conn, + struct smc_link *to_lnk) { atomic_dec(&conn->lnk->conn_cnt); conn->lnk = to_lnk; diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 64d86298e4df..c043ecdca5c4 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -446,6 +446,8 @@ void smc_core_exit(void); int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, u8 link_idx, struct smc_init_info *ini); void smcr_link_clear(struct smc_link *lnk, bool log); +void smc_switch_link_and_count(struct smc_connection *conn, + struct smc_link *to_lnk); int smcr_buf_map_lgr(struct smc_link *lnk); int smcr_buf_reg_lgr(struct smc_link *lnk); void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);