[PATCH 5.18 531/879] Revert "net/smc: fix listen processing for SMC-Rv2"

Greg Kroah-Hartman
2022-06-08T00:33:51Z

From: liuyacan <liuyacan@corp.netease.com>

[ Upstream commit 9029ac03f20a5999bc5627277c6cf008ab8e23ed ]

This reverts commit 8c3b8dc5cc9bf6d273ebe18b16e2d6882bcfb36d.

Some rollback issue will be fixed in other patches in the future.

Link: https://lore.kernel.org/all/20220523055056.2078994-1-liuyacan@corp.netease.com/

Fixes: 8c3b8dc5cc9b ("net/smc: fix listen processing for SMC-Rv2")
Signed-off-by: liuyacan <liuyacan@corp.netease.com>
Link: https://lore.kernel.org/r/20220524090230.2140302-1-liuyacan@corp.netease.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/smc/af_smc.c | 44 +++++++++++++++++---------------------------
1 file changed, 17 insertions(+), 27 deletions(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index d3de54b70c05..45a24d24210f 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -2093,13 +2093,13 @@ static int smc_listen_rdma_reg(struct smc_sock *new_smc, bool local_first)
return 0;
}

-static int smc_find_rdma_v2_device_serv(struct smc_sock *new_smc,
- struct smc_clc_msg_proposal *pclc,
- struct smc_init_info *ini)
+static void smc_find_rdma_v2_device_serv(struct smc_sock *new_smc,
+ struct smc_clc_msg_proposal *pclc,
+ struct smc_init_info *ini)
{
struct smc_clc_v2_extension *smc_v2_ext;
u8 smcr_version;
- int rc = 0;
+ int rc;

if (!(ini->smcr_version & SMC_V2) || !smcr_indicated(ini->smc_type_v2))
goto not_found;
@@ -2117,31 +2117,26 @@ static int smc_find_rdma_v2_device_serv(struct smc_sock *new_smc,
ini->smcrv2.saddr = new_smc->clcsock->sk->sk_rcv_saddr;
ini->smcrv2.daddr = smc_ib_gid_to_ipv4(smc_v2_ext->roce);
rc = smc_find_rdma_device(new_smc, ini);
- if (rc)
+ if (rc) {
+ smc_find_ism_store_rc(rc, ini);
goto not_found;
-
+ }
if (!ini->smcrv2.uses_gateway)
memcpy(ini->smcrv2.nexthop_mac, pclc->lcl.mac, ETH_ALEN);

smcr_version = ini->smcr_version;
ini->smcr_version = SMC_V2;
rc = smc_listen_rdma_init(new_smc, ini);
- if (rc) {
- ini->smcr_version = smcr_version;
- goto not_found;
- }
- rc = smc_listen_rdma_reg(new_smc, ini->first_contact_local);
- if (rc) {
- ini->smcr_version = smcr_version;
- goto not_found;
- }
- return 0;
+ if (!rc)
+ rc = smc_listen_rdma_reg(new_smc, ini->first_contact_local);
+ if (!rc)
+ return;
+ ini->smcr_version = smcr_version;
+ smc_find_ism_store_rc(rc, ini);

not_found:
- rc = rc ?: SMC_CLC_DECL_NOSMCDEV;
ini->smcr_version &= ~SMC_V2;
ini->check_smcrv2 = false;
- return rc;
}

static int smc_find_rdma_v1_device_serv(struct smc_sock *new_smc,
@@ -2174,7 +2169,6 @@ static int smc_listen_find_device(struct smc_sock *new_smc,
struct smc_init_info *ini)
{
int prfx_rc;
- int rc;

/* check for ISM device matching V2 proposed device */
smc_find_ism_v2_device_serv(new_smc, pclc, ini);
@@ -2202,18 +2196,14 @@ static int smc_listen_find_device(struct smc_sock *new_smc,
return ini->rc ?: SMC_CLC_DECL_NOSMCDDEV;

/* check if RDMA V2 is available */
- rc = smc_find_rdma_v2_device_serv(new_smc, pclc, ini);
- if (!rc)
+ smc_find_rdma_v2_device_serv(new_smc, pclc, ini);
+ if (ini->smcrv2.ib_dev_v2)
return 0;

- /* skip V1 check if V2 is unavailable for non-Device reason */
- if (rc != SMC_CLC_DECL_NOSMCDEV &&
- rc != SMC_CLC_DECL_NOSMCRDEV &&
- rc != SMC_CLC_DECL_NOSMCDDEV)
- return rc;
-
/* check if RDMA V1 is available */
if (!prfx_rc) {
+ int rc;
+
rc = smc_find_rdma_v1_device_serv(new_smc, pclc, ini);
smc_find_ism_store_rc(rc, ini);
return (!rc) ? 0 : ini->rc;
--
2.35.1