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IB/srpt: Log out all initiators if a port is disabled 

If an initiator observes LUN deletion during shutdown of the
target stack then that will trigger an I/O error even when using
multipathd. Users need a way to avoid that shutting down the
target stack causes I/O errors, e.g. by providing a way to force
initiator logout. Hence close all sessions if a target port is
disabled.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Estrin <alex.estrin@intel.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2016-02-11 11:09:28 -08:00 committed by Doug Ledford
parent fc3af58d3f
commit 043a6806a4
1 changed files with 19 additions and 4 deletions
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23
drivers/infiniband/ulp/srpt/ib_srpt.c
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@ -3152,6 +3152,8 @@ static ssize_t srpt_tpg_enable_store(struct config_item *item,
{
struct se_portal_group *se_tpg = to_tpg(item);
struct srpt_port *sport = container_of(se_tpg, struct srpt_port, port_tpg_1);
struct srpt_device *sdev = sport->sdev;
struct srpt_rdma_ch *ch;
unsigned long tmp;
int ret;
@ -3165,11 +3167,24 @@ static ssize_t srpt_tpg_enable_store(struct config_item *item,
pr_err("Illegal value for srpt_tpg_store_enable: %lu\n", tmp);
return -EINVAL;
}
if (tmp == 1)
sport->enabled = true;
else
sport->enabled = false;
if (sport->enabled == tmp)
goto out;
sport->enabled = tmp;
if (sport->enabled)
goto out;
mutex_lock(&sdev->mutex);
list_for_each_entry(ch, &sdev->rch_list, list) {
if (ch->sport == sport) {
pr_debug("%s: ch %p %s-%d\n", __func__, ch,
ch->sess_name, ch->qp->qp_num);
srpt_disconnect_ch(ch);
srpt_close_ch(ch);
}
}
mutex_unlock(&sdev->mutex);
out:
return count;
}