From 839d696ffb2714c06da7f55f622d0ac8286524b5 Mon Sep 17 00:00:00 2001 From: Karsten Graul Date: Fri, 2 Oct 2020 17:09:26 +0200 Subject: net/smc: send ISM devices with unique chid in CLC proposal When building a CLC proposal message then the list of ISM devices does not need to contain multiple devices that have the same chid value, all these devices use the same function at the end. Improve smc_find_ism_v2_device_clnt() to collect only ISM devices that have unique chid values. Signed-off-by: Karsten Graul Signed-off-by: David S. Miller --- net/smc/af_smc.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'net/smc/af_smc.c') diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index e874d0e6267f..670e802a73cb 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -599,6 +599,18 @@ static int smc_find_ism_device(struct smc_sock *smc, struct smc_init_info *ini) return 0; } +/* is chid unique for the ism devices that are already determined? */ +static bool smc_find_ism_v2_is_unique_chid(u16 chid, struct smc_init_info *ini, + int cnt) +{ + int i = (!ini->ism_dev[0]) ? 1 : 0; + + for (; i < cnt; i++) + if (ini->ism_chid[i] == chid) + return false; + return true; +} + /* determine possible V2 ISM devices (either without PNETID or with PNETID plus * PNETID matching net_device) */ @@ -608,6 +620,7 @@ static int smc_find_ism_v2_device_clnt(struct smc_sock *smc, int rc = SMC_CLC_DECL_NOSMCDDEV; struct smcd_dev *smcd; int i = 1; + u16 chid; if (smcd_indicated(ini->smc_type_v1)) rc = 0; /* already initialized for V1 */ @@ -615,10 +628,13 @@ static int smc_find_ism_v2_device_clnt(struct smc_sock *smc, list_for_each_entry(smcd, &smcd_dev_list.list, list) { if (smcd->going_away || smcd == ini->ism_dev[0]) continue; + chid = smc_ism_get_chid(smcd); + if (!smc_find_ism_v2_is_unique_chid(chid, ini, i)) + continue; if (!smc_pnet_is_pnetid_set(smcd->pnetid) || smc_pnet_is_ndev_pnetid(sock_net(&smc->sk), smcd->pnetid)) { ini->ism_dev[i] = smcd; - ini->ism_chid[i] = smc_ism_get_chid(ini->ism_dev[i]); + ini->ism_chid[i] = chid; ini->is_smcd = true; rc = 0; i++; -- cgit v1.2.3