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net/smc: rework pnet table to support SMC-R failover

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The pnet table stored pnet ids in the smc device structures. When a
device is going down its smc device structure is freed, and when the
device is brought online again it no longer has a pnet id set.
Rework the pnet table implementation to store the device name with their
assigned pnet id and apply the pnet id to devices when they are
registered.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Graul
2020-04-29 17:10:37 +02:00
committed by David S. Miller
parent 21615efa6a
commit fdff704dc6
4 changed files with 322 additions and 233 deletions
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5
net/smc/smc_ib.c
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@@ -579,8 +579,9 @@ static void smc_ib_add_dev(struct ib_device *ibdev)
i++) {
set_bit(i, &smcibdev->port_event_mask);
/* determine pnetids of the port */
smc_pnetid_by_dev_port(ibdev->dev.parent, i,
smcibdev->pnetid[i]);
if (smc_pnetid_by_dev_port(ibdev->dev.parent, i,
smcibdev->pnetid[i]))
smc_pnetid_by_table_ib(smcibdev, i + 1);
}
schedule_work(&smcibdev->port_event_work);
}