Commit Graph

115 Commits

Author SHA1 Message Date
Jianping Liu 3154060704 tkernel: sync code to the same with tk4 pub/lts/0017-kabi
Sync code to the same with tk4 pub/lts/0017-kabi, except deleted rue
and wujing. Partners can submit pull requests to this branch, and we
can pick the commits to tk4 pub/lts/0017-kabi easly.

Signed-off-by: Jianping Liu <frankjpliu@tencent.com>
2024-06-12 13:13:20 +08:00
Jianping Liu c62d6b571d ock: sync codes to ock 5.4.119-20.0009.21
Gitee limit the repo's size to 3GB, to reduce the size of the code,
sync codes to ock 5.4.119-20.0009.21 in one commit.

Signed-off-by: Jianping Liu <frankjpliu@tencent.com>
2024-06-11 20:27:38 +08:00
Linus Torvalds f65420df91 SCSI fixes on 20190720
This is the final round of mostly small fixes in our initial submit.
 It's mostly minor fixes and driver updates.  The only change of note
 is adding a virt_boundary_mask to the SCSI host and host template to
 parametrise this for NVMe devices instead of having them do a call in
 slave_alloc.  It's a fairly straightforward conversion except in the
 two NVMe handling drivers that didn't set it who now have a virtual
 infinity parameter added.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is the final round of mostly small fixes in our initial submit.

  It's mostly minor fixes and driver updates. The only change of note is
  adding a virt_boundary_mask to the SCSI host and host template to
  parametrise this for NVMe devices instead of having them do a call in
  slave_alloc. It's a fairly straightforward conversion except in the
  two NVMe handling drivers that didn't set it who now have a virtual
  infinity parameter added"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (24 commits)
  scsi: megaraid_sas: set an unlimited max_segment_size
  scsi: mpt3sas: set an unlimited max_segment_size for SAS 3.0 HBAs
  scsi: IB/srp: set virt_boundary_mask in the scsi host
  scsi: IB/iser: set virt_boundary_mask in the scsi host
  scsi: storvsc: set virt_boundary_mask in the scsi host template
  scsi: ufshcd: set max_segment_size in the scsi host template
  scsi: core: take the DMA max mapping size into account
  scsi: core: add a host / host template field for the virt boundary
  scsi: core: Fix race on creating sense cache
  scsi: sd_zbc: Fix compilation warning
  scsi: libfc: fix null pointer dereference on a null lport
  scsi: zfcp: fix GCC compiler warning emitted with -Wmaybe-uninitialized
  scsi: zfcp: fix request object use-after-free in send path causing wrong traces
  scsi: zfcp: fix request object use-after-free in send path causing seqno errors
  scsi: megaraid_sas: Update driver version to 07.710.50.00
  scsi: megaraid_sas: Add module parameter for FW Async event logging
  scsi: megaraid_sas: Enable msix_load_balance for Invader and later controllers
  scsi: megaraid_sas: Fix calculation of target ID
  scsi: lpfc: reduce stack size with CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE
  scsi: devinfo: BLIST_TRY_VPD_PAGES for SanDisk Cruzer Blade
  ...
2019-07-20 10:04:58 -07:00
Colin Ian King 41a6bf6529 scsi: libfc: fix null pointer dereference on a null lport
Currently if lport is null then the null lport pointer is dereference when
printing out debug via the FC_LPORT_DB macro. Fix this by using the more
generic FC_LIBFC_DBG debug macro instead that does not use lport.

Addresses-Coverity: ("Dereference after null check")
Fixes: 7414705ea4 ("libfc: Add runtime debugging with debug_logging module parameter")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-07-16 22:32:24 -04:00
Thomas Gleixner a61127c213 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 51 franklin st fifth floor boston ma 02110
  1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 111 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:06 +02:00
Christoph Hellwig d4fd634755 scsi: libfc: switch to SPDX tags
Use the the GPLv2 SPDX tag instead of verbose boilerplate text.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-05-21 06:16:22 -04:00
Chris Leech d5c3eb26d9 scsi: libfc: Don't have fc_exch_find log errors on a new exchange
With the error message I added in "libfc: sanity check cpu number
extracted from xid" I didn't account for the fact that fc_exch_find is
called with FC_XID_UNKNOWN at the start of a new exchange if we are the
responder.

It doesn't come up with the initiator much, but that's basically every
exchange for a target.  By checking the xid for FC_XID_UNKNOWN first, we
not only prevent the erroneous error message, but skip the unnecessary
lookup attempt as well.

[mkp: applied by hand due to conflict with Hannes' libfc patch series]

Signed-off-by: Chris Leech <cleech@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:58 -05:00
Hannes Reinecke 9625cc483b scsi: libfc: Replace ->seq_release callback with function call
The ->seq_release callback only ever had one implementation,
so call the function directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke 96d564e24a scsi: libfc: Replace ->seq_assign callback with function call
The ->seq_assign callback only ever had one implementation,
so call the function directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke f1d61e6e68 scsi: libfc: Replace ->seq_set_resp callback with direct function call
The ->seq_set_resp callback only ever had one implementation,
so call it directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke c6865b30be scsi: libfc: Replace ->seq_start_next callback with function call
The ->seq_start_next callback only ever had one implementation,
so call the function directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke 768c72cc34 scsi: libfc: Replace ->exch_done callback with function call
The ->exch_done callback only ever had one implementation,
so we can as well call it directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke 0ebaed17fe scsi: libfc: Replace ->seq_exch_abort callback with function call
The ->seq_exch_abort callback only ever had one implementation,
so we can as well call it directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke 0cac937da5 scsi: libfc: Replace ->seq_send callback with function call
The ->seq_send callback only ever had one implementation,
so we can as well call it directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:56 -05:00
Hannes Reinecke 3afd2d1521 scsi: libfc: Replace ->exch_seq_send callback with function call
The ->exch_seq_send callback only ever had one implementation,
so we can call the function directly and drop the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:55 -05:00
Hannes Reinecke c5cb444c31 scsi: libfc: Replace ->lport_recv with function call
The ->lport_recv callback only ever had one implementation,
so call the function directly and remove the callback.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:54 -05:00
Hannes Reinecke 7ab24dd165 scsi: libfc: Replace ->seq_els_rsp_send callback with function call
The 'seq_els_rsp_send' callback only ever had one implementation,
so we might as well drop it and use the function directly.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:54 -05:00
Hannes Reinecke e0a25286d8 scsi: libfc: Check xid when looking up REC exchanges
We currently can only lookup the local xid, so we need
to reject REC with empty rxid.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:53 -05:00
Hannes Reinecke 53db8fa8a3 scsi: libfc: Do not drop out-of-order frames
When receiving packets from the network we cannot guarantee any
frame ordering, so we should be receiving all valid frames and
let the upper layers deal with it.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:52 -05:00
Hannes Reinecke 9ca1e182b9 scsi: libfc: quarantine timed out xids
When a sequence times out we have no idea what happened to the
frame. And we do not know if we will ever receive the frame.
Hence we cannot re-use the xid as we would risk data corruption
if the xid had been re-used and the timed out frame would be
received after that.
So we need to quarantine the xid until the lport is reset.
Yes, I know this will (eventually) deplete the xid pool.
But for now it's the safest method.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:52 -05:00
Hannes Reinecke b73aa56ee9 scsi: libfc: safeguard against invalid exchange index
The cached exchange index might be invalid, in which case
we should drop down to allocate a new one.
And we should not try to access an invalid exchange when
responding to a BA_ABTS.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:52 -05:00
Hannes Reinecke f7ce413cea scsi: libfc: use configured lport R_A_TOV
We should be using the configured R_A_TOV value when sending the
exchange.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:51 -05:00
Hannes Reinecke 57d3ec7e46 scsi: libfc: additional debugging messages
Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:29:51 -05:00
Martin K. Petersen f8f91f3f31 scsi: libfc: Revert "[SCSI] libfc: use offload EM instance again instead jumping to next EM"
This reverts commit 3e22760d4d.

This revert came about because of efforts by Ewan Milne, Curtis Taylor
and I.  In researching this issue, significant performance issues were
seen on large CPU count systems using the software FCOE stack.  Hannes
also weighed in.

The same was not apparent on much smaller low count CPU systems.  The
behavior introduced by commit 3e22760d4d
lands sup with large count CPU systems seeing continual
blk_requeue_request() calls due to ML_QUEUE_HOST_BUSY.

fc_exch_alloc() used to try all the available exchange managers in the
list for an available exchange id, but this was changed in 2010 so that
if the first matched exchange manager couldn't allocate one, it fails
and we end up returning host busy.  This was due to commit:

Setting the ddp_min module parameter to fcoe to 128MB prevents the
->match function from permitting the use of the offload exchange manager
for the frame, and we no longer see the problem with host busy status,
since it uses the larger non-offloaded pool.

Reverting commit 3e22760d4d was tested to
also prevent the host busy issue due to failing allocations.

Suggested-by: Ewan Milne <emilne@redhat.com>
Suggested-by: Curtis Taylor <cjt@us.ibm.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Laurence Oberman <loberman@redhat.com>
2016-11-08 17:29:51 -05:00
Hannes Reinecke a850ced429 scsi: libfc: do not send ABTS when resetting exchanges
When all exchanges are reset the upper layers have already logged out of
the remote port, so the exchanges can be reset without sending any ABTS.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Chad Dupuis <chad.dupuis@qlogic.com>
Tested-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-18 22:35:17 -04:00
Chris Leech fa06883281 libfc: sanity check cpu number extracted from xid
In the receive path libfc extracts a cpu number from the ox_id in the
fiber channel header and uses that to do a per_cpu_ptr conversion.  If,
for some reason, a frame is received with an invalid ox_id, per_cpu_ptr
will return an invalid pointer and the libfc receive path will panic the
system trying to use it.

I'm currently looking at such a case, and I don't yet know why a cpu
number > nr_cpu_ids is appearing in an exchange id.  But adding a sanity
check in libfc prevents a system panic, and seems like good idea when
dealing with frames coming in from the network.

Signed-off-by: Chris Leech <cleech@redhat.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-13 21:49:57 -04:00
Bart Van Assche f6979adeaa libfc: Fix fc_exch_recv_req() error path
Due to patch "libfc: Do not invoke the response handler after
fc_exch_done()" (commit ID 7030fd62) the lport_recv() call
in fc_exch_recv_req() is passed a dangling pointer. Avoid this
by moving the fc_frame_free() call from fc_invoke_resp() to its
callers. This patch fixes the following crash:

general protection fault: 0000 [#3] PREEMPT SMP
RIP: fc_lport_recv_req+0x72/0x280 [libfc]
Call Trace:
 fc_exch_recv+0x642/0xde0 [libfc]
 fcoe_percpu_receive_thread+0x46a/0x5ed [fcoe]
 kthread+0x10a/0x120
 ret_from_fork+0x42/0x70

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-08-12 11:23:30 -07:00
Bart Van Assche 7030fd6261 libfc: Do not invoke the response handler after fc_exch_done()
While the FCoE initiator driver invokes fc_exch_done() from inside
the libfc response handler, FCoE target drivers typically invoke
fc_exch_done() from outside the libfc response handler. The object
fc_exch.arg points at may disappear as soon as fc_exch_done() has
finished. So it's important not to invoke the response handler
function after fc_exch_done() has finished. Modify libfc such that
this guarantee is provided if fc_exch_done() is invoked from
outside a response handler. This patch fixes a sporadic crash in
FCoE target implementations after a command has been aborted.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:45:22 -07:00
Bart Van Assche f95b35cfca libfc: Reduce exchange lock contention in fc_exch_recv_abts()
Reduce the time during which the exchange lock is held by allocating
a frame before obtaining the exchange lock.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:37:53 -07:00
Bart Van Assche cae7b6dd6c libfc: Avoid that sending after an abort triggers a kernel warning
Calling fc_seq_send() after an ABTS message has been received triggers
a kernel warning (WARN_ON(!(ep->esb_stat & ESB_ST_SEQ_INIT))). Avoid
this by returning -ENXIO to the caller if fc_seq_send() is invoked after
an ABTS message has been received.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:30:43 -07:00
Bart Van Assche 5d73bea2d3 libfc: Protect ep->esb_stat changes via ex_lock
This patch avoids that the WARN_ON(!(ep->esb_stat & ESB_ST_SEQ_INIT))
statement in fc_seq_send_locked() gets triggered sporadically when
running FCoE target code due to concurrent ep->esb_stat modifications.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:23:38 -07:00
Bart Van Assche b86788658b libfc: Fix a race in fc_exch_timer_set_locked()
It is allowed to pass a zero timeout value to fc_seq_exch_abort().
Avoid that this can cause the timeout function to drop the exchange
reference before it has been increased by fc_exch_timer_set_locked().
This patch fixes a crash when running FCoE target code with poisoning
enabled in the memory allocator.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:16:25 -07:00
Bart Van Assche 8d08023687 libfc: Clarify fc_exch_find()
The condition ep != NULL && ep->xid != xid can never be met. Make
this explicit.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:09:15 -07:00
Bart Van Assche a84ea8c7e8 libfc: Micro-optimize fc_setup_exch_mgr()
Convert a loop into an ilog2() call. Although this code is not performance
sensitive this conversion makes this code easier to read.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 13:02:09 -07:00
Bart Van Assche b20d9bfda7 libfc: Debug code fixes
The second argument of fc_lport_error() may be a valid frame pointer.
Hence only print it as an error code if it really is an error code.

Debug statements must end in a newline. Add one where it is missing.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 12:55:02 -07:00
Bart Van Assche c1d454246c libfc: Source code comment spelling fixes
Change 'initiaive' into 'initiative', 'remainig' into 'remaining'
and change 'exected' into 'expected'.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-09-04 12:47:49 -07:00
Robert Love 3a2926054a libfc: Differentiate echange timer cancellation debug statements
There are two debug statements with the same output string regarding
echange timer cancellation. This patch simply changes the output of
one string so that they can be differentiated.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2013-07-09 11:18:41 -07:00
Robert Love 4a80f083dd libfc: Remove extra space in fc_exch_timer_cancel definition
Simply remove an extra space that violates coding style.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2013-07-09 11:18:33 -07:00
Neil Horman fb00cc2353 libfc: extend ex_lock to protect all of fc_seq_send
This warning was reported recently:

WARNING: at drivers/scsi/libfc/fc_exch.c:478 fc_seq_send+0x14f/0x160 [libfc]()
(Not tainted)
Hardware name: ProLiant DL120 G7
Modules linked in: tcm_fc target_core_iblock target_core_file target_core_pscsi
target_core_mod configfs dm_round_robin dm_multipath 8021q garp stp llc bnx2fc
cnic uio fcoe libfcoe libfc scsi_transport_fc scsi_tgt autofs4 sunrpc
pcc_cpufreq ipv6 hpilo hpwdt e1000e microcode iTCO_wdt iTCO_vendor_support
serio_raw shpchp ixgbe dca mdio sg ext4 mbcache jbd2 sd_mod crc_t10dif pata_acpi
ata_generic ata_piix hpsa dm_mirror dm_region_hash dm_log dm_mod [last unloaded:
scsi_wait_scan]
Pid: 5464, comm: target_completi Not tainted 2.6.32-272.el6.x86_64 #1
Call Trace:
 [<ffffffff8106b747>] ? warn_slowpath_common+0x87/0xc0
 [<ffffffff8106b79a>] ? warn_slowpath_null+0x1a/0x20
 [<ffffffffa025f7df>] ? fc_seq_send+0x14f/0x160 [libfc]
 [<ffffffffa035cbce>] ? ft_queue_status+0x16e/0x210 [tcm_fc]
 [<ffffffffa030a660>] ? target_complete_ok_work+0x0/0x4b0 [target_core_mod]
 [<ffffffffa030a766>] ? target_complete_ok_work+0x106/0x4b0 [target_core_mod]
 [<ffffffffa030a660>] ? target_complete_ok_work+0x0/0x4b0 [target_core_mod]
 [<ffffffff8108c760>] ? worker_thread+0x170/0x2a0
 [<ffffffff810920d0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8108c5f0>] ? worker_thread+0x0/0x2a0
 [<ffffffff81091d66>] ? kthread+0x96/0xa0
 [<ffffffff8100c14a>] ? child_rip+0xa/0x20
 [<ffffffff81091cd0>] ? kthread+0x0/0xa0
 [<ffffffff8100c140>] ? child_rip+0x0/0x20

It occurs because fc_seq_send can have multiple contexts executing within it at
the same time, and fc_seq_send doesn't consistently use the ep->ex_lock that
protects this structure.  Because of that, its possible for one context to clear
the INIT bit in the ep->esb_state field while another checks it, leading to the
above stack trace generated by the WARN_ON in the function.

We should probably undertake the effort to convert access to the fc_exch
structures to use rcu, but that a larger work item.  To just fix this specific
issue, we can just extend the ex_lock protection through the entire fc_seq_send
path

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Gris Ge <fge@redhat.com>
CC: Robert Love <robert.w.love@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-05-10 10:19:23 -07:00
Vasu Dev b29a4f309f [SCSI] libfc: add exch timer debug info
Add exch timeout info to have debug log with exch timeout
value to match with retries, also add debug info
on exch timer cancel.

Added common fc_exch_timer_cancel() func and grouped this
along with fc_exch_timer_set() function, so that
added debug code is not repeated.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-07-20 08:58:55 +01:00
Vasu Dev 4e5fae7adb [SCSI] libfc: update fcp and exch stats
Updates newly added stats from fc_get_host_stats,
added new function fc_exch_update_stats to
update exches related stats from fc_exch.c
by going thru internal ema_list elements.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Acked-by : Robert Love <robert.w.love@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-07-20 08:31:48 +01:00
Vasu Dev 1bd49b4820 [SCSI] libfc, fcoe, bnx2fc: cleanup fcoe_dev_stats
The libfc is used by fcoe but fcoe agnostic,
and therefore should not have any fcoe references.

So renaming fcoe_dev_stats from libfc as its for fc_stats.
After that libfc is fcoe string free except some strings for
Open-FCoE.org.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Acked-by : Robert Love <robert.w.love@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Acked-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-07-20 08:31:47 +01:00
Steven Clark 011a9008b1 [SCSI] libfc: fcoe_transport_create fails in single-CPU environment
Starting fcoe fails at fcoe_transport_create when attempting to allocate a
pool of 4K exchanges on a 64-bit single-CPU environment because the call to
__alloc_percpu() is greater than the max of 32K.  This patch reduces the
number of exchanges to fit within the maximum allowed space.

[ Whitespace problems fixed by Robert Love to satisfy chechpatch.pl ]

Signed-off-by: Steven Clark <sclark@crossbeam.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-03-28 09:33:04 +01:00
Bhanu Prakash Gollapudi d4042e9c84 [SCSI] libfc: Fix panic in fc_exch_recv
Adding and removing the host into the zone causes this panic.

BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0
IP: [<ffffffffa0491707>] fc_exch_recv+0xc57/0xe70 [libfc]
Call Trace:
[<ffffffffa050e04b>] bnx2fc_l2_rcv_thread+0x37b/0x430 [bnx2fc]
[<ffffffffa050dcd0>] ? bnx2fc_l2_rcv_thread+0x0/0x430 [bnx2fc]
[<ffffffff81090886>] kthread+0x96/0xa0
[<ffffffff8100c14a>] child_rip+0xa/0x20
[<ffffffff810907f0>] ? kthread+0x0/0xa0
[<ffffffff8100c140>] ? child_rip+0x0/0x20

During fc_exch_reset, the active exchanges are aborted and the exch is deleted.
As part of processing ABTS response, due to 'ep' being NULL, any access to ep in
fc_exch_recv_bls() causes this panic. Fixed to access 'ep' only if non-NULL.

Reviewed-by: Neerav Parikh <neerav.parikh@intel.com>
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19 09:26:07 -06:00
Bart Van Assche c6b21c93c1 [SCSI] libfc: Declare local functions static
Avoid that sparse complains about missing declarations for local
functions by declaring these static or by adding an #include directive.
Add the __percpu annotation where it is missing.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16 12:45:48 +04:00
Linus Torvalds 32aaeffbd4 Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
* 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits)
  Revert "tracing: Include module.h in define_trace.h"
  irq: don't put module.h into irq.h for tracking irqgen modules.
  bluetooth: macroize two small inlines to avoid module.h
  ip_vs.h: fix implicit use of module_get/module_put from module.h
  nf_conntrack.h: fix up fallout from implicit moduleparam.h presence
  include: replace linux/module.h with "struct module" wherever possible
  include: convert various register fcns to macros to avoid include chaining
  crypto.h: remove unused crypto_tfm_alg_modname() inline
  uwb.h: fix implicit use of asm/page.h for PAGE_SIZE
  pm_runtime.h: explicitly requires notifier.h
  linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h
  miscdevice.h: fix up implicit use of lists and types
  stop_machine.h: fix implicit use of smp.h for smp_processor_id
  of: fix implicit use of errno.h in include/linux/of.h
  of_platform.h: delete needless include <linux/module.h>
  acpi: remove module.h include from platform/aclinux.h
  miscdevice.h: delete unnecessary inclusion of module.h
  device_cgroup.h: delete needless include <linux/module.h>
  net: sch_generic remove redundant use of <linux/module.h>
  net: inet_timewait_sock doesnt need <linux/module.h>
  ...

Fix up trivial conflicts (other header files, and  removal of the ab3550 mfd driver) in
 - drivers/media/dvb/frontends/dibx000_common.c
 - drivers/media/video/{mt9m111.c,ov6650.c}
 - drivers/mfd/ab3550-core.c
 - include/linux/dmaengine.h
2011-11-06 19:44:47 -08:00
Paul Gortmaker 09703660ed scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required
For the basic SCSI infrastructure files that are exporting symbols
but not modules themselves, add in the basic export.h header file
to allow the exports.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:31:23 -04:00
Vasu Dev b6e3c84034 [SCSI] libfc: avoid exchanges collision during lport reset
Currently timer delay is large and is using msleep to avoid
avoid exchanges collision across lport reset, so instead
do this by initializing exches pool indexes during
reset also.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Tested-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-10-31 13:27:19 +04:00
Vasu Dev 14fc315fa3 [SCSI] libfc: fix checking FC_TYPE_BLS
Its checked after skb freed, so instead have fh_type
cached and then check FC_TYPE_BLS against cached
fh_type value.

This wrong check was causing double exch locking as
reported by Bhanu at
https://lists.open-fcoe.org/pipermail/devel/2011-October/011793.html

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Tested-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-10-31 13:26:44 +04:00
Linus Torvalds ec7ae51753 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (204 commits)
  [SCSI] qla4xxx: export address/port of connection (fix udev disk names)
  [SCSI] ipr: Fix BUG on adapter dump timeout
  [SCSI] megaraid_sas: Fix instance access in megasas_reset_timer
  [SCSI] hpsa: change confusing message to be more clear
  [SCSI] iscsi class: fix vlan configuration
  [SCSI] qla4xxx: fix data alignment and use nl helpers
  [SCSI] iscsi class: fix link local mispelling
  [SCSI] iscsi class: Replace iscsi_get_next_target_id with IDA
  [SCSI] aacraid: use lower snprintf() limit
  [SCSI] lpfc 8.3.27: Change driver version to 8.3.27
  [SCSI] lpfc 8.3.27: T10 additions for SLI4
  [SCSI] lpfc 8.3.27: Fix queue allocation failure recovery
  [SCSI] lpfc 8.3.27: Change algorithm for getting physical port name
  [SCSI] lpfc 8.3.27: Changed worst case mailbox timeout
  [SCSI] lpfc 8.3.27: Miscellanous logic and interface fixes
  [SCSI] megaraid_sas: Changelog and version update
  [SCSI] megaraid_sas: Add driver workaround for PERC5/1068 kdump kernel panic
  [SCSI] megaraid_sas: Add multiple MSI-X vector/multiple reply queue support
  [SCSI] megaraid_sas: Add support for MegaRAID 9360/9380 12GB/s controllers
  [SCSI] megaraid_sas: Clear FUSION_IN_RESET before enabling interrupts
  ...
2011-10-28 16:44:18 -07:00