From: Stefan Raspl <raspl@linux.ibm.com>
Subject: smc: improve smc_clc_send_decline() error handling
Patch-mainline: v4.16-rc1
Git-commit: 0c9f1515aa80f12734123e5fcc50ffe525e1d533
References: FATE#325694, LTC#167874, bsc#1113480
Summary: net/smc: SMC-R MVP
Description: Add latest upstream patches to push SMC-R to the MVP level
Upstream-Description:
smc: improve smc_clc_send_decline() error handling
Let smc_clc_send_decline() return with an error, if the amount
sent is smaller than the length of an smc decline message.
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
net/smc/af_smc.c | 9 +++------
net/smc/smc_clc.c | 2 +-
2 files changed, 4 insertions(+), 7 deletions(-)
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -520,7 +520,7 @@ decline_rdma:
smc->use_fallback = true;
if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {
rc = smc_clc_send_decline(smc, reason_code);
- if (rc < sizeof(struct smc_clc_msg_decline))
+ if (rc < 0)
goto out_err;
}
goto out_connected;
@@ -879,11 +879,9 @@ static void smc_listen_work(struct work_
}
/* QP confirmation over RoCE fabric */
reason_code = smc_serv_conf_first_link(new_smc);
- if (reason_code < 0) {
+ if (reason_code < 0)
/* peer is not aware of a problem */
- rc = reason_code;
goto out_err_unlock;
- }
if (reason_code > 0)
goto decline_rdma_unlock;
}
@@ -916,8 +914,7 @@ decline_rdma:
smc_conn_free(&new_smc->conn);
new_smc->use_fallback = true;
if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {
- rc = smc_clc_send_decline(new_smc, reason_code);
- if (rc < sizeof(struct smc_clc_msg_decline))
+ if (smc_clc_send_decline(new_smc, reason_code) < 0)
goto out_err;
}
goto out_connected;
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -134,7 +134,7 @@ int smc_clc_send_decline(struct smc_sock
smc->sk.sk_err = EPROTO;
if (len < 0)
smc->sk.sk_err = -len;
- return len;
+ return sock_error(&smc->sk);
}
/* send CLC PROPOSAL message across internal TCP socket */