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net/smc: check for healthy link group resp. connections

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If a problem for at least one connection of a link group is detected,
the whole link group and all its connections are terminated.
This patch adds a check for healthy link group when trying to reserve
a work request, and checks for healthy connections before starting
a tx worker.

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
2018-01-25 11:15:36 +01:00
committed by David S. Miller
parent 732720fafd
commit 1a0a04c7a8
4 changed files with 29 additions and 12 deletions
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6
net/smc/smc_diag.c
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@@ -86,7 +86,8 @@ static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
goto errout;
if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) && smc->conn.lgr) {
if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) &&
smc->conn.alert_token_local) {
struct smc_connection *conn = &smc->conn;
struct smc_diag_conninfo cinfo = {
.token = conn->alert_token_local,
@@ -124,7 +125,8 @@ static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
goto errout;
}
if ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr) {
if ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr &&
!list_empty(&smc->conn.lgr->list)) {
struct smc_diag_lgrinfo linfo = {
.role = smc->conn.lgr->role,
.lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,