linux/drivers/infiniband
Jenny Derzhavetz bd3792205a iser-target: Fix pending connections handling in target stack shutdown sequnce
Instead of handing a connection to the iscsi stack
for processing right after accepting (rdma_accept) we only hand
the connection to the iscsi core after we reached to a connected
state (ESTABLISHED CM event). This will prevent two error scenrios:

1. race between rdma connection teardown and iscsi login sequence
   reported by Nic in: (ce9a9fc20a "iser-target: Fix REJECT CM event
   use-after-free OOPs")

2. target stack shutdown sequence race with constant login attempts by
   multiple initiators.

We address this by maintaining two queues at the isert_np level:
- accepted: connections that were accepted but have not reached
  connected state (might get rejected, unreachable or error).
- pending: connections in connected state, but have yet to handed
  to the iscsi core for login processing. iser connections are promoted
  to the pending queue only from the accepted queue.

This way the iscsi core now will only handle functional iser connections
and once we shutdown the target stack, we look for any stales that
got left behind so we can safely release them.

Signed-off-by: Jenny Derzhavetz <jennyf@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-09-15 15:47:27 -07:00
..
core Changes for 4.3 2015-09-09 08:33:31 -07:00
hw mm: mark most vm_operations_struct const 2015-09-10 13:29:01 -07:00
ulp iser-target: Fix pending connections handling in target stack shutdown sequnce 2015-09-15 15:47:27 -07:00
Kconfig RDMA/amso1100: Deprecate the amso1100 driver and move to staging 2015-08-28 22:54:49 -04:00
Makefile IB: Allow build of hw/ and ulp/ subdirectories independently 2014-06-02 14:51:12 -07:00