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scsi_transport_srp: Add periodic reconnect support

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Add support for periodically reconnecting to an SRP target until
the dev_loss timer expires. After the tenth reconnection attempt,
gradually slow down subsequent reconnect attempts.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Bart Van Assche
2013-10-26 14:35:59 +02:00
committed by Roland Dreier
parent c1120f8981
commit 8c64e4531c
4 changed files with 118 additions and 11 deletions
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4
drivers/infiniband/ulp/srp/ib_srp.c
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@@ -145,9 +145,9 @@ static int srp_tmo_set(const char *val, const struct kernel_param *kp)
tmo = -1;
}
if (kp->arg == &srp_fast_io_fail_tmo)
res = srp_tmo_valid(tmo, srp_dev_loss_tmo);
res = srp_tmo_valid(-1, tmo, srp_dev_loss_tmo);
else
res = srp_tmo_valid(srp_fast_io_fail_tmo, tmo);
res = srp_tmo_valid(-1, srp_fast_io_fail_tmo, tmo);
if (res)
goto out;
*(int *)kp->arg = tmo;