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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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3
net/smc/smc_ism.c
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@@ -296,7 +296,8 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
device_initialize(&smcd->dev);
dev_set_name(&smcd->dev, name);
smcd->ops = ops;
smc_pnetid_by_dev_port(parent, 0, smcd->pnetid);
if (smc_pnetid_by_dev_port(parent, 0, smcd->pnetid))
smc_pnetid_by_table_smcd(smcd);
spin_lock_init(&smcd->lock);
spin_lock_init(&smcd->lgr_lock);