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Target/iscsi,iser: Avoid accepting transport connections during stop stage

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When the target is in stop stage, iSER transport initiates RDMA disconnects.
The iSER initiator may wish to establish a new connection over the
still existing network portal. In this case iSER transport should not
accept and resume new RDMA connections. In order to learn that, iscsi_np
is added with enabled flag so the iSER transport can check when deciding
weather to accept and resume a new connection request.

The iscsi_np is enabled after successful transport setup, and disabled
before iscsi_np login threads are cleaned up.

Signed-off-by: Sagi Grimberg <[email protected]>
Cc: [email protected] # 3.10+
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Sagi Grimberg 2014-04-29 13:13:47 +03:00 • committed by Nicholas Bellinger
commit 14f4b54fe3
4 changed files with 13 additions and 1 deletions
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11
drivers/infiniband/ulp/isert/ib_isert.c
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@ -562,7 +562,15 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
struct isert_device *device;
struct ib_device *ib_dev = cma_id->device;
int ret = 0;
u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
u8 pi_support;
spin_lock_bh(&np->np_thread_lock);
if (!np->enabled) {
spin_unlock_bh(&np->np_thread_lock);
pr_debug("iscsi_np is not enabled, reject connect request\n");
return rdma_reject(cma_id, NULL, 0);
}
spin_unlock_bh(&np->np_thread_lock);
pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n",
cma_id, cma_id->context);
@ -653,6 +661,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
goto out_mr;
}
pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
if (pi_support && !device->pi_capable) {
pr_err("Protection information requested but not supported\n");
ret = -EINVAL;