iser-target: Allocate PI contexts dynamically

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commit 570db170f3 upstream.

This patch converts to allocate PI contexts dynamically in order
avoid a potentially bogus np->tpg_np and associated NULL pointer
dereference in isert_connect_request() during iser-target endpoint
shutdown with multiple network portals.

Also, there is really no need to allocate these at connection
establishment since it is not guaranteed that all the IOs on
that connection will be to a PI formatted device.

We can do it in a lazy fashion so the initial burst will have a
transient slow down, but very fast all IOs will allocate a PI
context.

Squashed:

iser-target: Centralize PI context handling code

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

This commit is contained in:

Sagi Grimberg 2014-12-02 16:57:31 +02:00 • committed by Luis Henriques

parent 63dff7ee67

commit 2a9a256db2

2 changed files with 158 additions and 116 deletions

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267

drivers/infiniband/ulp/isert/ib_isert.c

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7

drivers/infiniband/ulp/isert/ib_isert.h

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