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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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11
net/smc/smc_wr.c
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@@ -174,9 +174,9 @@ int smc_wr_tx_get_free_slot(struct smc_link *link,
struct smc_wr_tx_pend_priv **wr_pend_priv)
{
struct smc_wr_tx_pend *wr_pend;
u32 idx = link->wr_tx_cnt;
struct ib_send_wr *wr_ib;
u64 wr_id;
u32 idx;
int rc;
*wr_buf = NULL;
@@ -186,16 +186,17 @@ int smc_wr_tx_get_free_slot(struct smc_link *link,
if (rc)
return rc;
} else {
struct smc_link_group *lgr;
lgr = container_of(link, struct smc_link_group,
lnk[SMC_SINGLE_LINK]);
rc = wait_event_timeout(
link->wr_tx_wait,
list_empty(&lgr->list) || /* lgr terminated */
(smc_wr_tx_get_free_slot_index(link, &idx) != -EBUSY),
SMC_WR_TX_WAIT_FREE_SLOT_TIME);
if (!rc) {
/* timeout - terminate connections */
struct smc_link_group *lgr;
lgr = container_of(link, struct smc_link_group,
lnk[SMC_SINGLE_LINK]);
smc_lgr_terminate(lgr);
return -EPIPE;
}