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  1. 25 9月, 2014 6 次提交
  3. 17 9月, 2014 1 次提交
  5. 25 6月, 2014 1 次提交
  7. 04 6月, 2014 1 次提交
    • N
      qla2xxx: Convert to percpu_ida session tag pre-allocation · 51a07f84
      由 Nicholas Bellinger 提交于 
      This patch converts qla2xxx target code to use generic percpu_ida
tag allocation provided by target-core, thus removing the original
kmem_cache_zalloc() for each struct qla_tgt_cmd descriptor in the
incoming ATIO packet fast-path.

This includes the conversion of qlt_handle_cmd_for_atio() to perform
qla_tgt_sess lookup before dispatching a command descriptor into
qla_tgt_wq process context, along with handling the case where no
active session exists, and subsequently kicking off a seperate
process context for qlt_create_sess_from_atio() to create a new one.

It also includes moving tag allocation into generic code within
qlt_get_tag(), so that the same logic can be shared between
qlt_handle_cmd_for_atio() + qlt_create_sess_from_atio() contexts.
Also, __qlt_do_work() has been made generic between both normal
process context in qlt_do_work() + qlt_create_sess_from_atio().

Next, update qlt_free_cmd() to release the percpu-ida tags, and
drop the now-unused global qla_tgt_cmd_cachep.

Finally in tcm_qla2xxx code, tcm_qla2xxx_check_initiator_node_acl()
has been updated to use transport_init_session_tags() along with a
hardcoded TCM_QLA2XXX_DEFAULT_TAGS=2088 as the number of qla_tgt_cmd
descriptors to pre-allocate per qla_tgt_sess instance.

(Use ha->fw_xcb_count if available to calculate num_tags, and
 also factor in extra pad tags - Quinn)

Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      51a07f84
  9. 03 6月, 2014 1 次提交
  11. 19 5月, 2014 2 次提交
    • Q
      qla2xxx: ABTS cause double free of qla_tgt_cmd +. · 7b898542
      由 Quinn Tran 提交于 
      Fix double free problem within qla2xxx driver where
current code prematurely free qla_tgt_cmd while firmware
still has the command.  When firmware release the command
after abort, the code attempt a second free as part of
command completion processing.

When TCM start the free process, NULL pointer was hit.

------
WARNING: CPU: 8 PID: 43613 at lib/list_debug.c:62 __list_del_entry+0x82/0xd0()
list_del corruption. next->prev should be ffff88082b5cfb08, but was 6b6b6b6b6b6b6b6b
CPU: 8 PID: 43613 Comm: kworker/8:0 Tainted: GF       W  O 3.13.0-rc3-nab_t10dif+ #6
Hardware name: HP ProLiant DL380p Gen8, BIOS P70 08/20/2012
Workqueue: events cache_reap
000000000000003e ffff88081b2e3c78 ffffffff815a051f 000000000000003e
ffff88081b2e3cc8 ffff88081b2e3cb8 ffffffff8104fc2c 0000000000000000
ffff88082b5cfb00 ffff88081c788d00 ffff88082b5d7200 ffff88082b5d3080
Call Trace:
[<ffffffff815a051f>] dump_stack+0x49/0x62
[<ffffffff8104fc2c>] warn_slowpath_common+0x8c/0xc0
[<ffffffff8104fd16>] warn_slowpath_fmt+0x46/0x50
[<ffffffff812b6592>] __list_del_entry+0x82/0xd0
[<ffffffff8106d48c>] process_one_work+0x12c/0x510
[<ffffffff8106d4d3>] ? process_one_work+0x173/0x510
[<ffffffff8106ebdf>] worker_thread+0x11f/0x3a0
[<ffffffff8106eac0>] ? manage_workers+0x170/0x170
[<ffffffff81074f26>] kthread+0xf6/0x120
[<ffffffff8109f103>] ? __lock_release+0x133/0x1b0
[<ffffffff81074e30>] ? __init_kthread_worker+0x70/0x70
[<ffffffff815aec2c>] ret_from_fork+0x7c/0xb0
[<ffffffff81074e30>] ? __init_kthread_worker+0x70/0x70
---[ end trace dfc05c3f7caf8ebe ]---
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
IP: [<ffffffff8106d391>] process_one_work+0x31/0x510
-------
Signed-off-by: NQuinn Tran <quinn.tran@qlogic.com>
Signed-off-by: NGiridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NSaurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
      7b898542
    • Q
      qla2xxx: T10-Dif: add T10-PI support · f83adb61
      由 Quinn Tran 提交于 
      Add support for T10-Dif for Target Mode to qla driver.
The driver will look for firmware attribute that support
this feature.  When the feature is present, the capabilities
will be report to TCM layer.

Add CTIO CRC2 iocb to build T10-Dif commands.
Add support routines to process good & error cases.
Signed-off-by: NQuinn Tran <quinn.tran@qlogic.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: NGiridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NSaurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
      f83adb61
  13. 25 2月, 2014 1 次提交
    • D
      qla2xxx: Fix kernel panic on selective retransmission request · 6f58c780
      由 Dr. Greg Wettstein 提交于 
      A selective retransmission request (SRR) is a fibre-channel
protocol control request which provides support for requesting
retransmission of a data sequence in response to an issue such as
frame loss or corruption.  These events are experienced
infrequently in fibre-channel based networks which makes
it difficult to test and assess codepaths which handle these
events.

We were fortunate enough, for some definition of fortunate, to
have a metro-area single-mode SAN link which, at 10 GBPS
sustained load levels, would consistently generate SRR's in
a SCST based target implementation using our SCST/in-kernel
Qlogic target interface driver.  In response to an SRR the
in-kernel Qlogic target driver immediately panics resulting
in a catastrophic storage failure for serviced initiators.

The culprit was a debug statement in the qla_target.c file which
does not verify that a pointer to the SCSI CDB is not null.
The unchecked pointer dereference results in the kernel panic
and resultant system failure.

The other two references to the SCSI CDB by the SRR handling code
use a ternary operator to verify a non-null pointer is being
acted on.  This patch simply adds a similar test to the implicated
debug statement.

This patch is a candidate for any stable kernel being maintained
since it addresses a potentially catastrophic event with
minimal downside.
Signed-off-by: NDr. Greg Wettstein <greg@enjellic.com>
Cc: <stable@vger.kernel.org> #3.5+
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      6f58c780
  15. 21 2月, 2014 2 次提交
    • N
      qla2xxx: Check + fail when npiv_vports_inuse exists in shutdown · 3c231bda
      由 Nicholas Bellinger 提交于 
      This patch adds an check to qlt_stop_phase1() to avoid shutdown
when the base_vha contains a non-zero fc_host->npiv_vports_inuse
count.

This includes holding qla_tgt_mutex in qlt_stop_phase1() between
the fc_host->npiv_vports_inuse check + setting of tgt->tgt_stop to
avoid a possible race between qlt_lport_register() -> tcm_qla2xxx
-> tcm_qla2xxx_lport_register_npiv_cb() calling fc_vport_create().

Cc: Sawan Chandak <sawan.chandak@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      3c231bda
    • N
      qla2xxx: Fix qlt_lport_register base_vha callback race · ddb95145
      由 Nicholas Bellinger 提交于 
      This patch closes a race between qlt_lport_register() and
tcm_qla2xxx callback logic by holding qla_tgt_mutex before
making the callback.

In order for this to work, the qlt_add_target() and
qlt_remove_target() code has been changed to avoid the
accessing qla_tgt_mutex + list_[add,del] for NPIV enabled
ports.

This bug introduced in v3.14-rc1 code with commit 49a47f2c.

Cc: Sawan Chandak <sawan.chandak@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      ddb95145
  17. 13 2月, 2014 1 次提交
  19. 19 1月, 2014 3 次提交
  21. 20 12月, 2013 1 次提交
  23. 12 12月, 2013 1 次提交
  25. 11 9月, 2013 1 次提交
  27. 03 9月, 2013 1 次提交
  29. 21 6月, 2013 1 次提交
    • J
      qla_target: remove qlt_check_fcport_exist · 08234e3a
      由 Jörn Engel 提交于 
      Comment from original 2012 patch:
  In all our testing this function has never returned true.  However, the
  dropping of hardware_lock necessary to call this function seems to cause
  a use-after-free we manage to hit rather frequently.  Given this
  cost-benefit ratio, I'm willing to remove some 100 lines of code.

And since the same problem exists around shutdown_sess and put_sess,
this patch changes them from taking the hardware_lock to requiring the
hardware_lock to be taken.  In most cases the caller already had the
lock and had to drop it for the called method to reacquire it.  At best
that hurts performance and in rare instances it causes races with fatal
consequences.

We dropped the original 2012 patch when upgrading our kernel and it took
us nearly half a year to discover we still need it.

(nab: Fix qla_tgt_sess reference in tcm_qla2xxx_put_sess)
Signed-off-by: NJoern Engel <joern@logfs.org>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      08234e3a
  31. 25 4月, 2013 1 次提交
  33. 22 2月, 2013 3 次提交
  35. 30 11月, 2012 1 次提交
  37. 28 11月, 2012 1 次提交
  39. 30 10月, 2012 1 次提交
  41. 27 10月, 2012 1 次提交
    • R
      qla2xxx: Update target lookup session tables when a target session changes · c8292d1d
      由 Roland Dreier 提交于 
      It is possible for the target code to change the loop_id or s_id of a
target session in reaction to an FC fabric change.  However, the
session structures are stored in tables that are indexed by these two
keys, and if we just change the session structure but leave the
pointers to it in the old places in the table, havoc can ensue.  For
example, a new session might come along that should go in the old slot
in the table and overwrite the old session pointer.

To handle this, add a new tgt_ops->update_sess() method that also
updates the "by loop_id" and "by s_id" lookup tables when a session
changes, so that the keys where a session pointer is stored in these
tables always matches the keys in the session structure itself.

(nab: Drop unnecessary double inversion with FCF_CONF_COMP_SUPPORTED
      usage)
Signed-off-by: NRoland Dreier <roland@purestorage.com>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: stable@vger.kernel.org
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      c8292d1d
  43. 23 9月, 2012 1 次提交
  45. 21 8月, 2012 1 次提交
    • T
      workqueue: deprecate flush[_delayed]_work_sync() · 43829731
      由 Tejun Heo 提交于 
      flush[_delayed]_work_sync() are now spurious.  Mark them deprecated
and convert all users to flush[_delayed]_work().

If you're cc'd and wondering what's going on: Now all workqueues are
non-reentrant and the regular flushes guarantee that the work item is
not pending or running on any CPU on return, so there's no reason to
use the sync flushes at all and they're going away.

This patch doesn't make any functional difference.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avi Kivity <avi@redhat.com>
      43829731
  47. 17 7月, 2012 2 次提交
  49. 07 7月, 2012 1 次提交
    • A
      qla2xxx: print the right array elements in qlt_async_event · 4f1d0f19
      由 Alan Cox 提交于 
      Based upon Alan's patch from Coverity scan id 793583, these debug
messages in qlt_async_event() should be starting from byte 0, which is
always the Asynchronous Event Status Code from the parent switch statement.

Also, rename reason_code -> login_code following the language used in
2500 FW spec for Port Database Changed (0x8014) -> Port Database Changed
Event Mailbox Register for mailbox[2].
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      4f1d0f19
  51. 13 6月, 2012 3 次提交