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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>
This commit is contained in:
Ursula Braun 2017-12-07 13:38:45 +01:00 committed by David S. Miller
parent a8ae890b9c
commit 0c9f1515aa
2 changed files with 4 additions and 7 deletions
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9
net/smc/af_smc.c
View File

@ -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_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;

2
net/smc/smc_clc.c
View File

@ -133,7 +133,7 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info)
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 */