Commit Graph

3734 Commits

Author SHA1 Message Date
Yann Droneaud 7afbddfae9 IB/core: Temporarily disable create_flow/destroy_flow uverbs
The create_flow/destroy_flow uverbs and the associated extensions to
the user-kernel verbs ABI are under review and are too experimental to
freeze at this point.

So userspace is not exposed to experimental features and an uinstable
ABI, temporarily disable this for v3.12 (with a Kconfig option behind
staging to reenable it if desired).

The feature will be enabled after proper cleanup for v3.13.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Link: http://marc.info/?i=cover.1381351016.git.ydroneaud@opteya.com
Link: http://marc.info/?i=cover.1381177342.git.ydroneaud@opteya.com

[ Add a Kconfig option to reenable these verbs.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-21 09:44:17 -07:00
Linus Torvalds ed8ada3933 Last batch of IB changes for 3.12: many mlx5 hardware driver fixes plus
one trivial semicolon cleanup.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband updates from Roland Dreier:
 "Last batch of IB changes for 3.12: many mlx5 hardware driver fixes
  plus one trivial semicolon cleanup"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB: Remove unnecessary semicolons
  IB/mlx5: Ensure proper synchronization accessing memory
  IB/mlx5: Fix alignment of reg umr gather buffers
  IB/mlx5: Fix eq names to display nicely in /proc/interrupts
  mlx5: Fix error code translation from firmware to driver
  IB/mlx5: Fix opt param mask according to firmware spec
  mlx5: Fix opt param mask for sq err to rts transition
  IB/mlx5: Disable atomic operations
  mlx5: Fix layout of struct mlx5_init_seg
  mlx5: Keep polling to reclaim pages while any returned
  IB/mlx5: Avoid async events on invalid port number
  IB/mlx5: Decrease memory consumption of mr caches
  mlx5: Remove checksum on command interface commands
  IB/mlx5: Fix memory leak in mlx5_ib_create_srq
  IB/mlx5: Flush cache workqueue before destroying it
  IB/mlx5: Fix send work queue size calculation
2013-10-14 17:43:33 -07:00
Roland Dreier 59b5b28d1a Merge branch 'misc' into for-next 2013-10-14 10:10:46 -07:00
Joe Perches 2b50176d11 IB: Remove unnecessary semicolons
These aren't necessary after switch blocks.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-14 10:10:00 -07:00
Masanari Iida 8c88126bbb treewide: Fix typo in Kconfig
Correct spelling typo in Kconfig.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-10-14 15:23:02 +02:00
Eli Cohen 5431390707 IB/mlx5: Ensure proper synchronization accessing memory
Call mlx5_ib_populate_pas() before mapping the DMA buffer to ensure
the hardware reads the values written by the CPU.

Found by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:24:00 -07:00
Eli Cohen fe45f82704 IB/mlx5: Fix alignment of reg umr gather buffers
The hardware requires that gather buffers for UMR work requests be
aligned to 2K.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:59 -07:00
Sagi Grimberg ada9f5d007 IB/mlx5: Fix eq names to display nicely in /proc/interrupts
It's helpful for a driver to put the pci slot name in its interrupt
names, so /proc/interrupts will show the pci slot of the device.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:59 -07:00
Eli Cohen a4774e9095 IB/mlx5: Fix opt param mask according to firmware spec
Failed to configure opt mask to configure rre from init to rtr.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:58 -07:00
Eli Cohen 75959f56fe mlx5: Fix opt param mask for sq err to rts transition
Add missing entry in the table for UC transport.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:58 -07:00
Eli Cohen 81bea28ffd IB/mlx5: Disable atomic operations
Currently Atomic operations don't work properly.  Disable them for the
time being.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:58 -07:00
Eli Cohen a0c84c326f IB/mlx5: Avoid async events on invalid port number
On a single ported Connect-IB, its possible for the firmware to issue
events on the non-existing 2nd port.  Make sure to ignore events
generated for such ports.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:57 -07:00
Eli Cohen 203099fd73 IB/mlx5: Decrease memory consumption of mr caches
Change the logic so we do not allocate memory nor map the device
before actually posting to the REG_UMR QP. In addition, unmap and free
the memory after we get completion.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:56 -07:00
Moshe Lazer 56e1ab0f13 IB/mlx5: Fix memory leak in mlx5_ib_create_srq
The patch fixes the rollback in case of failure in creating SRQ.

Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:55 -07:00
Moshe Lazer 3c4619114c IB/mlx5: Flush cache workqueue before destroying it
Destroying the workqueue without flushing it first can lead to a case
in which the kernel tries to push a delayed work to the workqueue
which does not exist anymore.

Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:55 -07:00
Eli Cohen b125a54bfd IB/mlx5: Fix send work queue size calculation
1. Make sure wqe_cnt does not exceed the limit published by firmware.

2. There is no requirement that the number of outstanding work
   requests will be a power of two. Remove the ilog2 in the
   calculation of sq.max_post to fix that.

3. Add case for IB_QPT_XRC_TGT in sq_overhead and return 0 as XRC
   target QPs do not have a send queue.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-10-10 09:23:55 -07:00
Bjorn Helgaas 03078633a6 IB/qib: Drop qib_tune_pcie_caps() and qib_tune_pcie_coalesce() return values
The callers of qib_tune_pcie_caps() and qib_tune_pcie_coalesce() don't
check the return values, so this patch drops the return values altogether.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
2013-10-04 14:30:19 -06:00
Jack Wang c807f64340 ib_srpt: always set response for task management
The SRP specification requires:

  "Response data shall be provided in any SRP_RSP response that is sent in
   response to an SRP_TSK_MGMT request (see 6.7). The information in the
   RSP_CODE field (see table 24) shall indicate the completion status of
   the task management function."

So fix this to avoid the SRP initiator interprets task management functions
that succeeded as failed.

Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-10-03 04:23:17 -07:00
Nicholas Bellinger 0b41d6ca61 ib_srpt: Destroy cm_id before destroying QP.
This patch fixes a bug where ib_destroy_cm_id() was incorrectly being called
after srpt_destroy_ch_ib() had destroyed the active QP.

This would result in the following failed SRP_LOGIN_REQ messages:

Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff1762bd, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c903009f8f41)
Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff1758f9, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 2 (guid=0xfe80000000000000:0x2c903009f8f42)
Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff175941, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 2 (guid=0xfe80000000000000:0x2c90300a3cfb2)
Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1)
mlx4_core 0000:84:00.0: command 0x19 failed: fw status = 0x9
rejected SRP_LOGIN_REQ because creating a new RDMA channel failed.
Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1)
mlx4_core 0000:84:00.0: command 0x19 failed: fw status = 0x9
rejected SRP_LOGIN_REQ because creating a new RDMA channel failed.
Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1)

Reported-by: Navin Ahuja <navin.ahuja@saratoga-speed.com>
Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-10-01 21:27:30 -07:00
Eric W. Biederman 0bbf87d852 net ipv4: Convert ipv4.ip_local_port_range to be per netns v3
- Move sysctl_local_ports from a global variable into struct netns_ipv4.
- Modify inet_get_local_port_range to take a struct net, and update all
  of the callers.
- Move the initialization of sysctl_local_ports into
   sysctl_net_ipv4.c:ipv4_sysctl_init_net from inet_connection_sock.c

v2:
- Ensure indentation used tabs
- Fixed ip.h so it applies cleanly to todays net-next

v3:
- Compile fixes of strange callers of inet_get_local_port_range.
  This patch now successfully passes an allmodconfig build.
  Removed manual inlining of inet_get_local_port_range in ipv4_local_port_range

Originally-by: Samya <samya@twitter.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-30 21:59:38 -07:00
Yijing Wang 0ce0e62f1f IB/qib: Use pcie_set_mps() and pcie_get_mps() to simplify code
Refactor qib_tune_pcie_caps().  Use pcie_get_mps(), pcie_set_mps(),
pcie_get_readrq(), and pcie_set_readrq() to simplify the code.  The PCI
core caches the "PCIe Max Payload Size Supported" in pci_dev->pcie_mpss,
so use that instead of pcie_capability_read_word().  Remove the unused
val2fld() and fld2val().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
2013-09-24 14:17:06 -06:00
Yijing Wang dcaa73dc34 IB/qib: Use pci_is_root_bus() to check whether it is a root bus
Use pci_is_root_bus() instead of "if (bus->parent)" statement
for better readability.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
2013-09-24 12:13:03 -06:00
Martin Schwidefsky 0244ad004a Remove GENERIC_HARDIRQ config option
After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-13 15:09:52 +02:00
Linus Torvalds 48efe453e6 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
 "Lots of activity again this round for I/O performance optimizations
  (per-cpu IDA pre-allocation for vhost + iscsi/target), and the
  addition of new fabric independent features to target-core
  (COMPARE_AND_WRITE + EXTENDED_COPY).

  The main highlights include:

   - Support for iscsi-target login multiplexing across individual
     network portals
   - Generic Per-cpu IDA logic (kent + akpm + clameter)
   - Conversion of vhost to use per-cpu IDA pre-allocation for
     descriptors, SGLs and userspace page pointer list
   - Conversion of iscsi-target + iser-target to use per-cpu IDA
     pre-allocation for descriptors
   - Add support for generic COMPARE_AND_WRITE (AtomicTestandSet)
     emulation for virtual backend drivers
   - Add support for generic EXTENDED_COPY (CopyOffload) emulation for
     virtual backend drivers.
   - Add support for fast memory registration mode to iser-target (Vu)

  The patches to add COMPARE_AND_WRITE and EXTENDED_COPY support are of
  particular significance, which make us the first and only open source
  target to support the full set of VAAI primitives.

  Currently Linux clients are lacking upstream support to actually
  utilize these primitives.  However, with server side support now in
  place for folks like MKP + ZAB working on the client, this logic once
  reserved for the highest end of storage arrays, can now be run in VMs
  on their laptops"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (50 commits)
  target/iscsi: Bump versions to v4.1.0
  target: Update copyright ownership/year information to 2013
  iscsi-target: Bump default TCP listen backlog to 256
  target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-out
  iscsi-target; Bump default CmdSN Depth to 64
  iscsi-target: Remove unnecessary wait_for_completion in iscsi_get_thread_set
  iscsi-target: Add thread_set->ts_activate_sem + use common deallocate
  iscsi-target: Fix race with thread_pre_handler flush_signals + ISCSI_THREAD_SET_DIE
  target: remove unused including <linux/version.h>
  iser-target: introduce fast memory registration mode (FRWR)
  iser-target: generalize rdma memory registration and cleanup
  iser-target: move rdma wr processing to a shared function
  target: Enable global EXTENDED_COPY setup/release
  target: Add Third Party Copy (3PC) bit in INQUIRY response
  target: Enable EXTENDED_COPY setup in spc_parse_cdb
  target: Add support for EXTENDED_COPY copy offload emulation
  target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check
  target: Add global device list for EXTENDED_COPY
  target: Make helpers non static for EXTENDED_COPY command setup
  target: Make spc_parse_naa_6h_vendor_specific non static
  ...
2013-09-12 16:11:45 -07:00
Nicholas Bellinger 4c76251e8e target: Update copyright ownership/year information to 2013
Update copyright ownership/year information for target-core,
loopback, iscsi-target, tcm_qla2xx, vhost and iser-target.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10 20:23:36 -07:00
Vu Pham 59464ef4fb iser-target: introduce fast memory registration mode (FRWR)
This model was introduced in 00f7ec36c "RDMA/core: Add memory
management extensions support" and works when the IB device
supports the IB_DEVICE_MEM_MGT_EXTENSIONS capability.

Upon creating the isert device, ib_isert will test whether the HCA
supports FRWR. If supported then set the flag and assign
function pointers that handle fast registration and deregistration
of appropriate resources (fast_reg descriptors).

When new connection coming in, ib_isert will check frwr flag and
create frwr resouces, if fail to do it will switch back to
old model of using global dma key and turn off the frwr support.

Registration is done using posting IB_WR_FAST_REG_MR to the QP and
invalidations using posting IB_WR_LOCAL_INV.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10 16:48:51 -07:00
Vu Pham d40945d8c2 iser-target: generalize rdma memory registration and cleanup
Current driver uses global dma key to register the memory pointed
by sg list provided by the target core.

This is the preparation step for adding more methods like fast
path memory registration, make the reg/unreg calls be function
pointers.

Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10 16:48:50 -07:00
Vu Pham 90ecc6e251 iser-target: move rdma wr processing to a shared function
isert_put_datain() and isert_get_dataout() share a lot of code
in rdma wr processing, move this common code to a shared function.

Use isert_unmap_cmd to cleanup for RDMA_READ completion.
Remove duplicate field in isert_cmd and isert_rdma_wr structs
Change misc debug messages to track isert_cmd

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10 16:48:49 -07:00
Nicholas Bellinger d703ce2f7f iscsi/iser-target: Convert to command priv_size usage
This command converts iscsi/isert-target to use allocations based on
iscsit_transport->priv_size within iscsit_allocate_cmd(), instead of
using an embedded isert_cmd->iscsi_cmd.

This includes removing iscsit_transport->alloc_cmd() usage, along
with updating isert-target code to use iscsit_priv_cmd().

Also, remove left-over iscsit_transport->release_cmd() usage for
direct calls to iscsit_release_cmd(), and drop the now unused
lio_cmd_cache and isert_cmd_cache.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:21 -07:00
Nicholas Bellinger 6faaa85f37 iser-target: Updates for login negotiation multi-plexing support
This patch updates iser-target code to support login negotiation
multi-plexing.  This includes only using isert_conn->conn_login_comp
for the first login request PDU, pushing the subsequent processing
to iscsi_conn->login_work -> iscsi_target_do_login_rx(), and turning
isert_get_login_rx() into a NOP.

v3 changes:
   - Drop unnecessary LOGIN_FLAGS_READ_ACTIVE bit set in
     isert_rx_login_req()

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-09 14:27:21 -07:00
Linus Torvalds 2e515bf096 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree from Jiri Kosina:
 "The usual trivial updates all over the tree -- mostly typo fixes and
  documentation updates"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (52 commits)
  doc: Documentation/cputopology.txt fix typo
  treewide: Convert retrun typos to return
  Fix comment typo for init_cma_reserved_pageblock
  Documentation/trace: Correcting and extending tracepoint documentation
  mm/hotplug: fix a typo in Documentation/memory-hotplug.txt
  power: Documentation: Update s2ram link
  doc: fix a typo in Documentation/00-INDEX
  Documentation/printk-formats.txt: No casts needed for u64/s64
  doc: Fix typo "is is" in Documentations
  treewide: Fix printks with 0x%#
  zram: doc fixes
  Documentation/kmemcheck: update kmemcheck documentation
  doc: documentation/hwspinlock.txt fix typo
  PM / Hibernate: add section for resume options
  doc: filesystems : Fix typo in Documentations/filesystems
  scsi/megaraid fixed several typos in comments
  ppc: init_32: Fix error typo "CONFIG_START_KERNEL"
  treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks
  page_isolation: Fix a comment typo in test_pages_isolated()
  doc: fix a typo about irq affinity
  ...
2013-09-06 09:36:28 -07:00
Linus Torvalds 7c049d0869 Main batch of InfiniBand/RDMA changes for 3.12 merge window:
- Large ocrdma HW driver update: add "fast register" work requests,
    fixes, cleanups
  - Add receive flow steering support for raw QPs
  - Fix IPoIB neighbour race that leads to crash
  - iSER updates including support for using "fast register" memory
    registration
  - IPv6 support for iWARP
  - XRC transport fixes
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull main batch of InfiniBand/RDMA changes from Roland Dreier:
 - Large ocrdma HW driver update: add "fast register" work requests,
   fixes, cleanups
 - Add receive flow steering support for raw QPs
 - Fix IPoIB neighbour race that leads to crash
 - iSER updates including support for using "fast register" memory
   registration
 - IPv6 support for iWARP
 - XRC transport fixes

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (54 commits)
  RDMA/ocrdma: Fix compiler warning about int/pointer size mismatch
  IB/iser: Fix redundant pointer check in dealloc flow
  IB/iser: Fix possible memory leak in iser_create_frwr_pool()
  IB/qib: Move COUNTER_MASK definition within qib_mad.h header guards
  RDMA/ocrdma: Fix passing wrong opcode to modify_srq
  RDMA/ocrdma: Fill PVID in UMC case
  RDMA/ocrdma: Add ABI versioning support
  RDMA/ocrdma: Consider multiple SGES in case of DPP
  RDMA/ocrdma: Fix for displaying proper link speed
  RDMA/ocrdma: Increase STAG array size
  RDMA/ocrdma: Dont use PD 0 for userpace CQ DB
  RDMA/ocrdma: FRMA code cleanup
  RDMA/ocrdma: For ERX2 irrespective of Qid, num_posted offset is 24
  RDMA/ocrdma: Fix to work with even a single MSI-X vector
  RDMA/ocrdma: Remove the MTU check based on Ethernet MTU
  RDMA/ocrdma: Add support for fast register work requests (FRWR)
  RDMA/ocrdma: Create IRD queue fix
  IB/core: Better checking of userspace values for receive flow steering
  IB/mlx4: Add receive flow steering support
  IB/core: Export ib_create/destroy_flow through uverbs
  ...
2013-09-05 09:39:27 -07:00
Linus Torvalds 27703bb4a6 PTR_RET() is a weird name, and led to some confusing usage. We ended
up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages.
 
 This has been sitting in linux-next for a whole cycle.
 
 Thanks,
 Rusty.
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Merge tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull PTR_RET() removal patches from Rusty Russell:
 "PTR_RET() is a weird name, and led to some confusing usage.  We ended
  up with PTR_ERR_OR_ZERO(), and replacing or fixing all the usages.

  This has been sitting in linux-next for a whole cycle"

[ There are still some PTR_RET users scattered about, with some of them
  possibly being new, but most of them existing in Rusty's tree too.  We
  have that

      #define PTR_RET(p) PTR_ERR_OR_ZERO(p)

  thing in <linux/err.h>, so they continue to work for now  - Linus ]

* tag 'PTR_RET-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  GFS2: Replace PTR_RET with PTR_ERR_OR_ZERO
  Btrfs: volume: Replace PTR_RET with PTR_ERR_OR_ZERO
  drm/cma: Replace PTR_RET with PTR_ERR_OR_ZERO
  sh_veu: Replace PTR_RET with PTR_ERR_OR_ZERO
  dma-buf: Replace PTR_RET with PTR_ERR_OR_ZERO
  drivers/rtc: Replace PTR_RET with PTR_ERR_OR_ZERO
  mm/oom_kill: remove weird use of ERR_PTR()/PTR_ERR().
  staging/zcache: don't use PTR_RET().
  remoteproc: don't use PTR_RET().
  pinctrl: don't use PTR_RET().
  acpi: Replace weird use of PTR_RET.
  s390: Replace weird use of PTR_RET.
  PTR_RET is now PTR_ERR_OR_ZERO(): Replace most.
  PTR_RET is now PTR_ERR_OR_ZERO
2013-09-04 17:31:11 -07:00
Roland Dreier 82af24ac6f Merge branches 'cxgb4', 'flowsteer', 'ipoib', 'iser', 'mlx4', 'ocrdma' and 'qib' into for-next 2013-09-03 09:01:08 -07:00
Roland Dreier 33ccbd858f RDMA/ocrdma: Fix compiler warning about int/pointer size mismatch
Fix:

   drivers/infiniband/hw/ocrdma/ocrdma_verbs.c: In function 'ocrdma_build_fr':
>> drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:1832:7: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     mr = (struct ocrdma_mr *)qp->dev->stag_arr[(hdr->lkey >> 8) &
          ^
   drivers/infiniband/hw/ocrdma/ocrdma_verbs.c: In function 'ocrdma_alloc_frmr':
>> drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:2661:64: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = (u64) mr;

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-03 09:00:08 -07:00
Sagi Grimberg 2e02d653fe IB/iser: Fix redundant pointer check in dealloc flow
This bug was discovered by Smatch static checker run by Dan Carpenter.
If in free_rx_descriptors(), rx_descs are not NULL then the iser
device is definately not NULL, so no need to check it before
dereferencing it.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:26:16 -07:00
Roi Dayan 27ae2d1ea5 IB/iser: Fix possible memory leak in iser_create_frwr_pool()
Fix leak where desc is not being freed in error flows.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:24:08 -07:00
Ira Weiny 0318f68521 IB/qib: Move COUNTER_MASK definition within qib_mad.h header guards
Commit 36a8f01cd2 ("IB/qib: Add congestion control agent
implementation") caused statements to leak pass the header guard.
Fix this.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:22:20 -07:00
Naresh Gottumukkala d7e19c0ad9 RDMA/ocrdma: Fix passing wrong opcode to modify_srq
Fix passing wrong opcode to ocrdma_modify_srq and query SRQ.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:46 -07:00
Naresh Gottumukkala 84b105db59 RDMA/ocrdma: Fill PVID in UMC case
In UMC case, driver needs to fill PVID in the address vector
template for UD traffic.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:45 -07:00
Naresh Gottumukkala 3875439715 RDMA/ocrdma: Add ABI versioning support
Add ABI versioning support between driver and userspace library.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:45 -07:00
Naresh Gottumukkala 117e6dd1c5 RDMA/ocrdma: Consider multiple SGES in case of DPP
While posting inline DPP data, we are not considering multiple sges.
Fix this.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:44 -07:00
Naresh Gottumukkala f24ceba6b6 RDMA/ocrdma: Fix for displaying proper link speed
Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:43 -07:00
Naresh Gottumukkala c43e9ab84d RDMA/ocrdma: Increase STAG array size
1) Increase STAG Array size.
2) Max inline data size should be set to the same value
   used during QP creation
3) Set max_sge_rd to zero since we dont support RD transport in our adapters.
4) Max cqes reported in ibv_devinfo should be from QUERY_CONFIG.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:42 -07:00
Naresh Gottumukkala cffce99051 RDMA/ocrdma: Dont use PD 0 for userpace CQ DB
Create_CQ verb doesn't provide a PD pointer.  So, until now we are
creating all (both userspace and kernel) CQ DB regions from PD0.  This
will result in mmapping PD0 to applications.  A rogue userspace
application can mess things up.

Also more serious issues is even the be2net NIC uses PD0.

This patch addresses this problem by:

1) Create a PD page for every userspace application when the
   alloc_ucontext is called. This will be destroyed in
   dealloc_ucontext.
2) All CQs for that context will use the PD allocated in ucontext.
3) The first create_PD call from application will result in returning
   the PD address from its ucontext (no new PD will be created).
4) For subsecquent create_pd calls from application, we create new PDs for
   the application.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:18:32 -07:00
Naresh Gottumukkala 2b51a9b9eb RDMA/ocrdma: FRMA code cleanup
1) Fixed setting FR_MR bit for FRWR stag allocation
2) Access rights are passsed during FRWR stage and not during STAT allocation stage
3) FRWR WQE structure cleanup
4) Add QP level signaled bit.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:17:56 -07:00
Naresh Gottumukkala f11220ee69 RDMA/ocrdma: For ERX2 irrespective of Qid, num_posted offset is 24
1) All RQ doorbells are handled by ERX2 and doorbell->num_posted
   offset is constant to bit offset 24 for ERX2 irrspective of Q id.

2) Fixed RESET to INIT state change (from ERR->RST->INIT->RTR case).

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:17:55 -07:00
Naresh Gottumukkala c88bd03ffc RDMA/ocrdma: Fix to work with even a single MSI-X vector
There are cases like SRIOV where can get only one MSI-X vector
allocated for RoCE.  In that case we need to use the vector for both
data plane and control plane.  We need to use EQ create version V2.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:17:54 -07:00
Naresh Gottumukkala d3cb6c0b2a RDMA/ocrdma: Remove the MTU check based on Ethernet MTU
Also increase MAX AH to 512.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:17:53 -07:00
Naresh Gottumukkala 7c33880c3c RDMA/ocrdma: Add support for fast register work requests (FRWR)
Also get the max_srq value from query_config mailbox response.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:17:48 -07:00
Naresh Gottumukkala 43a6b4025c RDMA/ocrdma: Create IRD queue fix
1)	Fix ocrdma_get_num_posted_shift for upto 128 QPs.
2)	Create for min of dev->max_wqe and requested wqe in create_qp.
3)	As part of creating ird queue, populate with basic header templates.
4)	Make sure all the DB memory allocated to userspace are page aligned.
5)	Fix issue in checking the mmap local cache.
6)	Some code cleanup.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 21:16:21 -07:00
Matan Barak 22878dbc91 IB/core: Better checking of userspace values for receive flow steering
- Don't allow unsupported comp_mask values, user should check
    ibv_query_device to know which features are supported.
  - Add a check in ib_uverbs_create_flow() to verify the size passed
    from the user space.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-09-02 11:12:48 -07:00
Hadar Hen Zion f77c0162a3 IB/mlx4: Add receive flow steering support
Implement ib_create_flow() and ib_destroy_flow().

Translate the verbs structures provided by the user to HW structures
and call the MLX4_QP_FLOW_STEERING_ATTACH/DETACH firmware commands.

On the ATTACH command completion, the firmware provides a 64-bit
registration ID, which is placed into struct mlx4_ib_flow that wraps
the instance of struct ib_flow which is retuned to caller.  Later,
this reg ID is used for detaching that flow from the firmware.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-28 09:53:56 -07:00
Hadar Hen Zion 436f2ad05a IB/core: Export ib_create/destroy_flow through uverbs
Implement ib_uverbs_create_flow() and ib_uverbs_destroy_flow() to
support flow steering for user space applications.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-28 09:53:14 -07:00
Igor Ivanov 400dbc9658 IB/core: Infrastructure for extensible uverbs commands
Add infrastructure to support extended uverbs capabilities in a
forward/backward manner.  Uverbs command opcodes which are based on
the verbs extensions approach should be greater or equal to
IB_USER_VERBS_CMD_THRESHOLD.  They have new header format and
processed a bit differently.

Whenever a specific IB_USER_VERBS_CMD_XXX is extended, which practically means
it needs to have additional arguments, we will be able to add them without creating
a completely new IB_USER_VERBS_CMD_YYY command or bumping the uverbs ABI version.

This patch for itself doesn't provide the whole scheme which is also dependent
on adding a comp_mask field to each extended uverbs command struct.

The new header framework allows for future extension of the CMD arguments
(ib_uverbs_cmd_hdr.in_words, ib_uverbs_cmd_hdr.out_words) for an existing
new command (that is a command that supports the new uverbs command header format
suggested in this patch) w/o bumping ABI version and with maintaining backward
and formward compatibility to new and old libibverbs versions.

In the uverbs command we are passing both uverbs arguments and the provider arguments.
We split the ib_uverbs_cmd_hdr.in_words to ib_uverbs_cmd_hdr.in_words which will now carry only
uverbs input argument struct size and  ib_uverbs_cmd_hdr.provider_in_words that will carry
the provider input argument size. Same goes for the response (the uverbs CMD output argument).

For example take the create_cq call and the mlx4_ib provider:

The uverbs layer gets libibverb's struct ibv_create_cq (named struct ib_uverbs_create_cq
in the kernel), mlx4_ib gets libmlx4's struct mlx4_create_cq (which includes struct
ibv_create_cq and is named struct mlx4_ib_create_cq in the kernel) and
in_words = sizeof(mlx4_create_cq)/4 .

Thus ib_uverbs_cmd_hdr.in_words carry both uverbs plus mlx4_ib input argument sizes,
where uverbs assumes it knows the size of its input argument - struct ibv_create_cq.

Now, if we wish to add a variable to struct ibv_create_cq, we can add a comp_mask field
to the struct which is basically bit field indicating which fields exists in the struct
(as done for the libibverbs API extension), but we need a way to tell what is the total
size of the struct and not assume the struct size is predefined (since we may get different
struct sizes from different user libibverbs versions). So we know at which point the
provider input argument (struct mlx4_create_cq) begins. Same goes for extending the
provider struct mlx4_create_cq. Thus we split the ib_uverbs_cmd_hdr.in_words to
ib_uverbs_cmd_hdr.in_words which will now carry only uverbs input argument struct size and
ib_uverbs_cmd_hdr.provider_in_words that will carry the provider (mlx4_ib) input argument size.

Signed-off-by: Igor Ivanov <Igor.Ivanov@itseez.com>
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-28 09:52:03 -07:00
Hadar Hen Zion 319a441d13 IB/core: Add receive flow steering support
The RDMA stack allows for applications to create IB_QPT_RAW_PACKET
QPs, which receive plain Ethernet packets, specifically packets that
don't carry any QPN to be matched by the receiving side.  Applications
using these QPs must be provided with a method to program some
steering rule with the HW so packets arriving at the local port can be
routed to them.

This patch adds ib_create_flow(), which allow providing a flow
specification for a QP.  When there's a match between the
specification and a received packet, the packet is forwarded to that
QP, in a the same way one uses ib_attach_multicast() for IB UD
multicast handling.

Flow specifications are provided as instances of struct ib_flow_spec_yyy,
which describe L2, L3 and L4 headers.  Currently specs for Ethernet, IPv4,
TCP and UDP are defined.  Flow specs are made of values and masks.

The input to ib_create_flow() is a struct ib_flow_attr, which contains
a few mandatory control elements and optional flow specs.

    struct ib_flow_attr {
            enum ib_flow_attr_type type;
            u16      size;
            u16      priority;
            u32      flags;
            u8       num_of_specs;
            u8       port;
            /* Following are the optional layers according to user request
             * struct ib_flow_spec_yyy
             * struct ib_flow_spec_zzz
             */
    };

As these specs are eventually coming from user space, they are defined and
used in a way which allows adding new spec types without kernel/user ABI
change, just with a little API enhancement which defines the newly added spec.

The flow spec structures are defined with TLV (Type-Length-Value)
entries, which allows calling ib_create_flow() with a list of variable
length of optional specs.

For the actual processing of ib_flow_attr the driver uses the number
of specs and the size mandatory fields along with the TLV nature of
the specs.

Steering rules processing order is according to the domain over which
the rule is set and the rule priority.  All rules set by user space
applicatations fall into the IB_FLOW_DOMAIN_USER domain, other domains
could be used by future IPoIB RFS and Ethetool flow-steering interface
implementation.  Lower numerical value for the priority field means
higher priority.

The returned value from ib_create_flow() is a struct ib_flow, which
contains a database pointer (handle) provided by the HW driver to be
used when calling ib_destroy_flow().

Applications that offload TCP/IP traffic can also be written over IB
UD QPs.  The ib_create_flow() / ib_destroy_flow() API is designed to
support UD QPs too.  A HW driver can set IB_DEVICE_MANAGED_FLOW_STEERING
to denote support for flow steering.

The ib_flow_attr enum type supports usage of flow steering for promiscuous
and sniffer purposes:

    IB_FLOW_ATTR_NORMAL - "regular" rule, steering according to rule specification

    IB_FLOW_ATTR_ALL_DEFAULT - default unicast and multicast rule, receive
        all Ethernet traffic which isn't steered to any QP

    IB_FLOW_ATTR_MC_DEFAULT - same as IB_FLOW_ATTR_ALL_DEFAULT but only for multicast

    IB_FLOW_ATTR_SNIFFER - sniffer rule, receive all port traffic

ALL_DEFAULT and MC_DEFAULT rules options are valid only for Ethernet link type.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-28 09:51:52 -07:00
Or Gerlitz 6a06a4b8cf [SCSI] IB/iser: Add Discovery support
To run discovery over iSER we need to advertize the CAP_TEXT_NEGO capability
towards user space. Also need to make sure the login RX buffer is posted when
SendTargets TEXT PDUs are sent. For that end, we use a setting of the
ISCSI_PARAM_DISCOVERY_SESS iscsi param as an indication that this is
discovery session.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-08-26 18:53:49 +04:00
Joe Perches 8be04b9374 treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks
Don't emit OOM warnings when k.alloc calls fail when
there there is a v.alloc immediately afterwards.

Converted a kmalloc/vmalloc with memset to kzalloc/vzalloc.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-08-20 13:06:40 +02:00
Jim Foraker 49b8e74438 IPoIB: Fix race in deleting ipoib_neigh entries
In several places, this snippet is used when removing neigh entries:

	list_del(&neigh->list);
	ipoib_neigh_free(neigh);

The list_del() removes neigh from the associated struct ipoib_path, while
ipoib_neigh_free() removes neigh from the device's neigh entry lookup
table.  Both of these operations are protected by the priv->lock
spinlock.  The table however is also protected via RCU, and so naturally
the lock is not held when doing reads.

This leads to a race condition, in which a thread may successfully look
up a neigh entry that has already been deleted from neigh->list.  Since
the previous deletion will have marked the entry with poison, a second
list_del() on the object will cause a panic:

  #5 [ffff8802338c3c70] general_protection at ffffffff815108c5
     [exception RIP: list_del+16]
     RIP: ffffffff81289020  RSP: ffff8802338c3d20  RFLAGS: 00010082
     RAX: dead000000200200  RBX: ffff880433e60c88  RCX: 0000000000009e6c
     RDX: 0000000000000246  RSI: ffff8806012ca298  RDI: ffff880433e60c88
     RBP: ffff8802338c3d30   R8: ffff8806012ca2e8   R9: 00000000ffffffff
     R10: 0000000000000001  R11: 0000000000000000  R12: ffff8804346b2020
     R13: ffff88032a3e7540  R14: ffff8804346b26e0  R15: 0000000000000246
     ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0000
  #6 [ffff8802338c3d38] ipoib_cm_tx_handler at ffffffffa066fe0a [ib_ipoib]
  #7 [ffff8802338c3d98] cm_process_work at ffffffffa05149a7 [ib_cm]
  #8 [ffff8802338c3de8] cm_work_handler at ffffffffa05161aa [ib_cm]
  #9 [ffff8802338c3e38] worker_thread at ffffffff81090e10
 #10 [ffff8802338c3ee8] kthread at ffffffff81096c66
 #11 [ffff8802338c3f48] kernel_thread at ffffffff8100c0ca

We move the list_del() into ipoib_neigh_free(), so that deletion happens
only once, after the entry has been successfully removed from the lookup
table.  This same behavior is already used in ipoib_del_neighs_by_gid()
and __ipoib_reap_neigh().

Signed-off-by: Jim Foraker <foraker1@llnl.gov>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:57:37 -07:00
Steve Wise 09992579bc RDMA/cxgb4: Issue RI.FINI before closing when entering TERM
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:49 -07:00
Steve Wise a2de1499b3 RDMA/cxgb4: Advertise ~0ULL as max MR size
Lustre uses a advertised max MR size of ~0ULL to indicate it should
use a dma_mr.  Hence advertise max MR size as ~0ULL.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:48 -07:00
Steve Wise b298881fcf RDMA/cxgb4: Always do GTS write if cidx_inc == CIDXINC_MASK
When polling, we do a GTS update if the accumulated cidx_inc == the CQ
depth / 16.  However, if the CQ is large enough, Cq depth / 16 exceeds
the size of the field in the GTS word.  So we also need to update if
cidx_inc hits CIDXINC_MASK to avoid overflowing the field.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:47 -07:00
Steve Wise b38a0ad8ec RDMA/cxgb4: Set arp error handler for PASS_ACCEPT_RPL messages
accept_cr() failed to set the arp error handler on a reused skb.  This
results in a kernel crash if the arp does indeed time out.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:47 -07:00
Steve Wise 27ca34f54a RDMA/cxgb4: Fix accounting for unsignaled SQ WRs to deal with wrap
When determining how many WRs are completed with a signaled CQE,
correctly deal with queue wraps.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:46 -07:00
Steve Wise 1cf24dcef4 RDMA/cxgb4: Fix QP flush logic
This patch makes following fixes in QP flush logic:

- correctly flushes unsignaled WRs followed by a signaled WR
- supports for flushing a CQ bound to multiple QPs
- resets cidx_flush if a active queue starts getting HW CQEs again
- marks WQ in error when we leave RTS. This was only being done for
  user queues, but we need it for kernel queues too so that
  post_send/post_recv will start returning the appropriate error
  synchronously
- eats unsignaled read resp CQEs. HW always inserts CQEs so we must
  silently discard them if the read work request was unsignaled.
- handles QP flushes with pending SW CQEs. The flush and out of order
  completion logic has a bug where if out of order completions are
  flushed but not yet polled by the consumer and the qp is then
  flushed then we end up inserting duplicate completions.
- c4iw_flush_sq() should only flush wrs that have not already been
  flushed.  Since we already track where in the SQ we've flushed via
  sq.cidx_flush, just start at that point and flush any remaining.
  This bug only caused a problem in the presence of unsignaled work
  requests.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>

[ Fixed sparse warning due to htonl/ntohl confusion.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:45 -07:00
Steve Wise 97d7ec0c41 RDMA/cxgb4: Handle newer firmware changes
Move QP to TERMINATE instead to allow the peer to get the TERM
message. This bug wasn't detectable until newer FW that moves
connections out of RDMA mode as soon as an error is detected.

QP can exit RTS before the last AE arrives.  This was introduced by
changes in the FW to kick connections out of RDMA mode as soon as an
error is detected.  A side effect of this is that the driver can move
the QP out of RTS before the AE causing the connection to get kicked
out of RDMA mode is processed.  Fix for this is to always post async
errors even if the QP is out of RTS.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:44 -07:00
Steve Wise 68074bb1ab RDMA/cxgb4: Use correct bit shift macros for vlan filter tuples
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:43 -07:00
Vipul Pandya 830662f6f0 RDMA/cxgb4: Add support for active and passive open connection with IPv6 address
Add new cpl messages, cpl_act_open_req6 and cpl_t5_act_open_req6, for
initiating active open connections.

Use LLD api cxgb4_create_server and cxgb4_create_server6 for
initiating passive open connections. Similarly use cxgb4_remove_server
to remove the passive open connections in place of listen_stop.

Add support for iWARP over VLAN device and enable IPv6 support on VLAN device.

Make use of import_ep in c4iw_reconnect.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>

[ Fix build when IPv6 is disabled and make sure iw_cxgb4 is not built-in
  when ipv6 is a module.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:55:06 -07:00
Yishai Hadas 846be90d81 IB/core: Fixes to XRC reference counting in uverbs
Added reference counting mechanism for XRC target QPs between
ib_uqp_object and its ib_uxrcd_object.  This prevents closing an XRC
domain that is still attached to a QP.  In addition, add missing code
in ib_uverbs_destroy_srq() to handle ib_uxrcd_object reference
counting correctly when destroying an xsrq.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:21:32 -07:00
Yishai Hadas 73c40c616a IB/core: Add locking around event dispatching on XRC target QPs
Fix a potential race when event occurrs on a target XRC QP and in the
middle of reporting that on its shared qps, one of them is destroyed
by user space application.  Also add note for kernel consumers in
ib_verbs.h that they must not destroy the QP from within the handler.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:21:32 -07:00
Yijing Wang b29b076394 IB/qib: Clean up unnecessary MSI/MSI-X capability find
PCI core will initialize device MSI/MSI-X capability in
pci_msi_init_pci_dev().  So device drivers should use
pci_dev->msi_cap/msix_cap to determine whether a device supports
MSI/MSI-X instead of using pci_find_capability(pci_dev,
PCI_CAP_ID_MSI/MSIX).  Access to PCIe device config space again will
consume more time.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:17:23 -07:00
Paul Bolle bea25e82c6 IB/qib: Make qib_driver static
struct pci_driver qib_driver is only used in qib_init.c.  Remove it
from qib.h and make it static in qib_init.c.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:14:51 -07:00
CQ Tang 4668e4b527 IB/qib: Improve SDMA performance
1. The code accepts chunks of messages, and splits the chunk into
   packets when converting packets into sdma queue entries.  Adjacent
   packets will use user buffer pages smartly to avoid pinning the
   same page multiple times.

2. Instead of discarding all the work when SDMA queue is full, the
   work is saved in a pending queue.  Whenever there are enough SDMA
   queue free entries, pending queue is directly put onto SDMA queue.

3. An interrupt handler is used to progress this pending queue.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: CQ Tang <cq.tang@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>

[ Fixed up sparse warnings.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-13 11:14:34 -07:00
Steve Wise 24d44a391f RDMA/cma: Add IPv6 support for iWARP
Modify the type of local_addr and remote_addr fields in struct
iw_cm_id from struct sockaddr_in to struct sockaddr_storage to hold
IPv6 and IPv4 addresses uniformly.

Change the references of local_addr and remote_addr in cxgb4, cxgb3,
nes and amso drivers to match this.  However to be able to actully run
traffic over IPv6, low-level drivers have to add code to support this.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>

[ Fix unused variable warnings when INFINIBAND_NES_DEBUG not set.
  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 12:32:31 -07:00
Naresh Gottumukkala 45e86b33ec RDMA/ocrdma: Cache recv DB until QP moved to RTR
1) In post recv, don't ring the DB doorbell if the QP is in RTR state.
   Cache the DB calls, until the QP is moved to RTS state.
2) Add max_rd_sge support to dev->attr.
3) Code cleanup in alloc_pd path.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 11:00:51 -07:00
Naresh Gottumukkala 7b9b1a596e RDMA/ocrdma: Remove __packed
1) Remove __packed for structures.
2) Align and pad all ABI structure to 64 bit boundaries
   instead of using __packed.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 10:59:44 -07:00
Naresh Gottumukkala 057729cb23 RDMA/ocrdma: Remove driver QP state machine
Remove QP state machine in ocrdma low-level driver and use on the core
IB stack's instead.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 10:58:38 -07:00
Naresh Gottumukkala 9c58726ba9 RDMA/ocrdma: Don't allow zero/invalid sgid usage
Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 10:58:38 -07:00
Naresh Gottumukkala 1afc0454b6 RDMA/ocrdma: Remove redundant dev reference
Remove redundant dev reference from structures:

1) ocrdma_cq.
2) ocrdma_ah.
3) ocrdma_hw_mr.
4) ocrdma_mw.
5) ocrdma_srq.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 10:58:38 -07:00
Naresh Gottumukkala f99b1649db RDMA/ocrdma: Style and redundant code cleanup
Code cleanup and remove redundant code:

1) redundant initialization removed
2) braces changed as per CodingStyle.
3) redundant checks removed
4) extra braces in return statements removed.
5) removed unused pd pointer from mr.
6) reorganized get_dma_mr()
7) fixed set_av() to return error on invalid sgid index.
8) reference to ocrdma_dev removed from struct ocrdma_pd.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-12 10:58:37 -07:00
Sagi Grimberg 5587856c96 IB/iser: Introduce fast memory registration model (FRWR)
Newer HCAs and Virtual functions may not support FMRs but rather a fast
registration model, which we call FRWR - "Fast Registration Work Requests".

This model was introduced in 00f7ec36c ("RDMA/core: Add memory management
extensions support") and works when the IB device supports the
IB_DEVICE_MEM_MGT_EXTENSIONS capability.

Upon creating the iser device iser will test whether the HCA supports
FMRs.  If no support for FMRs, check if IB_DEVICE_MEM_MGT_EXTENSIONS
is supported and assign function pointers that handle fast
registration and allocation of appropriate resources (fast_reg
descriptors).

Registration is done using posting IB_WR_FAST_REG_MR to the QP and
invalidations using posting IB_WR_LOCAL_INV.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:10 -07:00
Sagi Grimberg e657571b76 IB/iser: Place the fmr pool into a union in iser's IB conn struct
This is preparation step for other memory registration methods to be
added.  In addition, change reg/unreg routines signature to indicate
they use FMRs.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:09 -07:00
Sagi Grimberg 919fc274ef IB/iser: Handle unaligned SG in separate function
This routine will be shared with other rdma management schemes.  The
bounce buffer solution for unaligned SG-lists and the sg_to_page_vec
routine are likely to be used for other registration schemes and not
just FMR.

Move them out of the FMR specific code, and call them from there.
Later they will be called also from other reg methods code.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:09 -07:00
Sagi Grimberg b4e155ffbb IB/iser: Generalize rdma memory registration
Currently the driver uses FMRs as the only means to register the
memory pointed by SG provided by the SCSI mid-layer with the RDMA
device.

As preparation step for adding more methods for fast path memory
registration, make the alloc/free and reg/unreg calls function
pointers, which are for now just set to the existing FMR ones.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:09 -07:00
Shlomo Pongratz b7f0451309 IB/iser: Accept session->cmds_max from user space
Use cmds_max passed from user space to be the number of PDUs to be
supported for the session instead of hard-coded ISCSI_DEF_XMIT_CMDS_MAX.
This allow controlling the max number of SCSI commands for the session.
Also don't ignore the qdepth passed from user space.

Derive from session->cmds_max the actual number of RX buffers and FMR
pool size to allocate during the connection bind phase.

Since the iser transport connection is established before the iscsi
session/connection are created and bound, we still use one hard-coded
quantity ISER_DEF_XMIT_CMDS_MAX to compute the maximum number of
work-requests to be supported by the RC QP used for the connection.

The above quantity is made to be a power of two between ISCSI_TOTAL_CMDS_MIN
(16) and ISER_DEF_XMIT_CMDS_MAX (512) inclusive.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:08 -07:00
Shlomo Pongratz 986db0d6c0 IB/iser: Restructure allocation/deallocation of connection resources
This is a preparation step to a patch that accepts the number of max
SCSI commands to be supported a session from user space iSCSI tools.

Move the allocation of the login buffer, FMR pool and its associated
page vector from iser_create_ib_conn_res() (which is called prior when
we actually know how many commands should be supported) to
iser_alloc_rx_descriptors() (which is called during the iscsi
connection bind step where this quantity is known).

Also do small refactoring around the deallocation to make that path
similar to the allocation one.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:08 -07:00
Or Gerlitz f91424cf5b IB/iser: Use proper debug level value for info prints
Commit 4f36388261 ("IB/iser: Move informational messages from error
to info level") set info prints to be emitted at a lower debug level
than warning prints, which is a bit odd.  Fix that.

Also move the prints on unaligned SG from warning to debug level.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-08-09 17:18:08 -07:00
Roland Dreier 569935db80 Merge branches 'cma', 'cxgb3', 'cxgb4', 'ipoib', 'misc', 'mlx4', 'mlx5', 'nes', 'ocrdma' and 'qib' into for-next 2013-07-31 14:24:06 -07:00
Erez Shitrit c290414169 IPoIB: Fix pkey change flow for virtualization environments
IPoIB's required behaviour w.r.t to the pkey used by the device is the following:

- For "parent" interfaces (e.g ib0, ib1, etc) who are created
  automatically as a result of hot-plug events from the IB core, the
  driver needs to take whatever pkey vlaue it finds in index 0, and
  stick to that index.

- For child interfaces (e.g ib0.8001, etc) created by admin directive,
  the driver needs to use and stick to the value provided during its
  creation.

In SR-IOV environment its possible for the VF probe to take place
before the cloud management software provisions the suitable pkey for
the VF in the paravirtualed PKEY table index 0. When this is the case,
the VF IB stack will find in index 0 an invalide pkey, which is all
zeros.

Moreover, the cloud managment can assign the pkey value at index 0 at
any time of the guest life cycle.

The correct behavior for IPoIB to address these requirements for
parent interfaces is to use PKEY_CHANGE event as trigger to optionally
re-init the device pkey value and re-create all the relevant resources
accordingly, if the value of the pkey in index 0 has changed (from
invalid to valid or from valid value X to invalid value Y).

This patch enhances the heavy flushing code which is triggered by pkey
change event, to behave correctly for parent devices. For child
devices, the code remains the same, namely chases pkey value and not
index.

Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:23:44 -07:00
Or Gerlitz 3d790a4c26 IPoIB: Make sure child devices use valid/proper pkeys
Make sure that the IB invalid pkey (0x0000 or 0x8000) isn't used for
child devices.

Also, make sure to always set the full membership bit for the pkey of
devices created by rtnl link ops.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:23:40 -07:00
Jack Morgenstein ef5ed4166f IB/core: Create QP1 using the pkey index which contains the default pkey
Currently, QP1 is created using pkey index 0. This patch simply looks
for the index containing the default pkey, rather than hard-coding
pkey index 0.

This change will have no effect in native mode, since QP0 and QP1 are
created before the SM configures the port, so pkey table will still be
the default table defined by the IB Spec, in C10-123: "If non-volatile
storage is not used to hold P_Key Table contents, then if a PM
(Partition Manager) is not present, and prior to PM initialization of
the P_Key Table, the P_Key Table must act as if it contains a single
valid entry, at P_Key_ix = 0, containing the default partition
key. All other entries in the P_Key Table must be invalid."

Thus, in the native mode case, the driver will find the default pkey
at index 0 (so it will be no different than the hard-coding).

However, in SR-IOV mode, for VFs, the pkey table may be
paravirtualized, so that the VF's pkey index zero may not necessarily
be mapped to the real pkey index 0. For VFs, therefore, it is
important to find the virtual index which maps to the real default
pkey.

This commit does the following for QP1 creation:

1. Find the pkey index containing the default pkey, and use that index
   if found.  ib_find_pkey() returns the index of the
   limited-membership default pkey (0x7FFF) if the full-member default
   pkey is not in the table.

2. If neither form of the default pkey is found, use pkey index 0
   (previous behavior).

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:15:17 -07:00
Andi Shyti 618af3846b mlx5_core: Variable may be used uninitialized
In the sq_overhead() function, if qp_typ is equal to IB_QPT_RC, size
will be used uninitialized.

Signed-off-by: Andi Shyti <andi@etezian.org>
Acked-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:12:33 -07:00
Dan Carpenter 92b0ca7cb1 IB/mlx5: Fix stack info leak in mlx5_ib_alloc_ucontext()
We don't set "resp.reserved".  Since it's at the end of the struct
that means we don't have to copy it to the user.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:12:08 -07:00
Wei Yongjun 281d1a9211 IB/mlx5: Fix error return code in init_one()
Fix to return a negative error code from the error handling case
instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 14:12:07 -07:00
Jack Morgenstein 3eac103f83 IB/mlx4: Use default pkey when creating tunnel QPs
When creating tunnel QPs for special QP tunneling, look for the
default pkey in the slave's virtual pkey table.  If it is present, use
the real pkey index where the default pkey is located.

If the default pkey is not found in the pkey table, use the real pkey
index which is stored at index 0 in the slave's virtual pkey table
(this is the current behavior).

This change is required to support cloud computing, where the
paravirtualized index of the default pkey is moved to index 1 or
higher.  The pkey at paravirtualized index 0 is used for the default
IPoIB interface created by the VF.

Its possible for the pkey value at paravirtualized index 0 to be
invalid (zero) at VF probe time (pkey index 0 is mapped to real pkey
index 127, which contains pkey = 0).

At some point after the VF probe, the cloud computing interface at the
hypervisor maps virtual index 0 for the VF to the pkey index
containing the pkey that IPoIB will use in its operation.  However,
when the tunnel QP is created, the pkey at the slave's virtual index 0
is still mapped to the invalid pkey index, so tunnel QP creation
fails.

This commit causes the hypervisor to search for the default pkey in
the slave's pkey table -- and this pkey is present in the table (at
index > 0) at tunnel QP creation time, so that the tunnel QP creation
will succeed.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 12:22:12 -07:00
Sean Hefty 5eb695c177 RDMA/cma: Only call cma_save_ib_info() for CM REQs
Calling cma_save_ib_info() for CM SIDR REQs results in a crash
accessing an invalid path record pointer.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 00:50:44 -07:00
Sean Hefty e511d1ae16 RDMA/cma: Fix accessing invalid private data for UD
If a application is using AF_IB with a UD QP, but does not provide any
private data, we will end up accessing invalid memory.  Check for this
case and handle it appropriately.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-31 00:50:40 -07:00
Paul Bolle 8fb488d740 RDMA/cma: Fix gcc warning
Building cma.o triggers this gcc warning:

    drivers/infiniband/core/cma.c: In function ‘rdma_resolve_addr’:
    drivers/infiniband/core/cma.c:465:23: warning: ‘port’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    drivers/infiniband/core/cma.c:426:5: note: ‘port’ was declared here

This is a false positive, as "port" will always be initialized if we're
at "found". But if we assign to "id_priv->id.port_num" directly, we can
drop "port". That will, obviously, silence gcc.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 16:11:22 -07:00
Roland Dreier 3c93f039d2 Revert "RDMA/nes: Fix compilation error when nes_debug is enabled"
This reverts commit bca1935ccd, which removes variables
nes_tcp_state_str and nes_iwarp_state_str, assuming that they aren't
defined.  However, they are defined within a #ifdef NES_DEBUG statement,
which if enabled causes "defined but not used" compiler warning, when
the variables are removed.

Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 15:48:35 -07:00
Mike Marciniszyn b268e4db3d IB/qib: Add err_decode() call for ring dump
Commit 0b3ddf380c ("Log all SDMA errors unconditionally") missed
part of the patch.

This also corrects a format warning when dma_addr_t is 32 bits
on a 64 bit system.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 10:13:00 -07:00
Dan Carpenter 246fcdbc9d RDMA/cxgb3: Fix stack info leak in iwch_create_cq()
The "uresp.reserved" field isn't initialized on this path so it could
leak uninitialized stack information to the user.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 10:11:33 -07:00
Dan Carpenter 604296303f RDMA/nes: Fix info leaks in nes_create_qp() and nes_create_cq()
We pass a few bytes of uninitialized stack memory to the user here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 10:10:35 -07:00
Dan Carpenter 63ea374957 RDMA/ocrdma: Fix several stack info leaks
A grab bag of places which don't properly initialize stack data.  I
removed one place which cleared ".rsvd" because it's not needed now
that I have added a memset() earlier in the function.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 10:09:16 -07:00
Dan Carpenter ae1fe07f3f RDMA/cxgb4: Fix stack info leak in c4iw_create_qp()
"uresp.ma_sync_key" doesn't get set on this path so we leak 8 bytes of data.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-30 10:07:56 -07:00
Roland Dreier 3606b99971 RDMA/ocrdma: Remove unused include
I'd like to remove rdma/ib_cache.h some day, so let's avoid
proliferating uses of it unnecessarily.

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-26 10:03:04 -07:00
Rusty Russell 8c6ffba0ed PTR_RET is now PTR_ERR_OR_ZERO(): Replace most.
Sweep of the simple cases.

Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-15 11:25:01 +09:30
Linus Torvalds c552441373 Main batch of InfiniBand/RDMA changes for 3.11 merge window:
- AF_IB (native IB addressing) for CMA from Sean Hefty
  - New mlx5 driver for Mellanox Connect-IB adapters (including post merge request fixes)
  - SRP fixes from Bart Van Assche (including fix to first merge request)
  - qib HW driver updates
  - Resurrection of ocrdma HW driver development
  - uverbs conversion to create fds with O_CLOEXEC set
  - Other small changes and fixes
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull InfiniBand/RDMA changes from Roland Dreier:
 - AF_IB (native IB addressing) for CMA from Sean Hefty
 - new mlx5 driver for Mellanox Connect-IB adapters (including post
   merge request fixes)
 - SRP fixes from Bart Van Assche (including fix to first merge request)
 - qib HW driver updates
 - resurrection of ocrdma HW driver development
 - uverbs conversion to create fds with O_CLOEXEC set
 - other small changes and fixes

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (66 commits)
  mlx5: Return -EFAULT instead of -EPERM
  IB/qib: Log all SDMA errors unconditionally
  IB/qib: Fix module-level leak
  mlx5_core: Adjust hca_cap.uar_page_sz to conform to Connect-IB spec
  IB/srp: Let srp_abort() return FAST_IO_FAIL if TL offline
  IB/uverbs: Use get_unused_fd_flags(O_CLOEXEC) instead of get_unused_fd()
  mlx5_core: Fixes for sparse warnings
  IB/mlx5: Make profile[] static in main.c
  mlx5: Fix parameter type of health_handler_t
  mlx5: Add driver for Mellanox Connect-IB adapters
  IB/core: Add reserved values to enums for low-level driver use
  IB/srp: Bump driver version and release date
  IB/srp: Make HCA completion vector configurable
  IB/srp: Maintain a single connection per I_T nexus
  IB/srp: Fail I/O fast if target offline
  IB/srp: Skip host settle delay
  IB/srp: Avoid skipping srp_reset_host() after a transport error
  IB/srp: Fix remove_one crash due to resource exhaustion
  IB/qib: New transmitter tunning settings for Dell 1.1 backplane
  IB/core: Fix error return code in add_port()
  ...
2013-07-13 12:57:21 -07:00
Roland Dreier e04abfa243 Merge branches 'mlx5', 'qib' and 'srp' into for-next 2013-07-11 16:49:30 -07:00
Dan Carpenter 5e631a03af mlx5: Return -EFAULT instead of -EPERM
For copy_to/from_user() failure, the correct error code is -EFAULT not
-EPERM.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-11 16:48:45 -07:00
Dean Luick 0b3ddf380c IB/qib: Log all SDMA errors unconditionally
This patch adds code to log SDMA errors for supportability purposes.

Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-11 16:47:06 -07:00
Mike Marciniszyn 308c813b19 IB/qib: Fix module-level leak
The vzalloc()'ed field physshadow is leaked on module unload.

This patch adds vfree after the sibling page shadow is freed.

Reported-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-11 16:46:44 -07:00
Bart Van Assche 80d5e8a235 IB/srp: Let srp_abort() return FAST_IO_FAIL if TL offline
If the transport layer is offline it is more appropriate to let
srp_abort() return FAST_IO_FAIL instead of SUCCESS.

Reported-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-11 16:43:48 -07:00
Linus Torvalds 6d2fa9e141 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
 "Lots of activity this round on performance improvements in target-core
  while benchmarking the prototype scsi-mq initiator code with
  vhost-scsi fabric ports, along with a number of iscsi/iser-target
  improvements and hardening fixes for exception path cases post v3.10
  merge.

  The highlights include:

   - Make persistent reservations APTPL buffer allocated on-demand, and
     drop per t10_reservation buffer.  (grover)
   - Make virtual LUN=0 a NULLIO device, and skip allocation of NULLIO
     device pages (grover)
   - Add transport_cmd_check_stop write_pending bit to avoid extra
     access of ->t_state_lock is WRITE I/O submission fast-path.  (nab)
   - Drop unnecessary CMD_T_DEV_ACTIVE check from
     transport_lun_remove_cmd to avoid extra access of ->t_state_lock in
     release fast-path.  (nab)
   - Avoid extra t_state_lock access in __target_execute_cmd fast-path
     (nab)
   - Drop unnecessary vhost-scsi wait_for_tasks=true usage +
     ->t_state_lock access in release fast-path.  (nab)
   - Convert vhost-scsi to use modern se_cmd->cmd_kref
     TARGET_SCF_ACK_KREF usage (nab)
   - Add tracepoints for SCSI commands being processed (roland)
   - Refactoring of iscsi-target handling of ISCSI_OP_NOOP +
     ISCSI_OP_TEXT to be transport independent (nab)
   - Add iscsi-target SendTargets=$IQN support for in-band discovery
     (nab)
   - Add iser-target support for in-band discovery (nab + Or)
   - Add iscsi-target demo-mode TPG authentication context support (nab)
   - Fix isert_put_reject payload buffer post (nab)
   - Fix iscsit_add_reject* usage for iser (nab)
   - Fix iscsit_sequence_cmd reject handling for iser (nab)
   - Fix ISCSI_OP_SCSI_TMFUNC handling for iser (nab)
   - Fix session reset bug with RDMA_CM_EVENT_DISCONNECTED (nab)

  The last five iscsi/iser-target items are CC'ed to stable, as they do
  address issues present in v3.10 code.  They are certainly larger than
  I'd like for stable patch set, but are important to ensure proper
  REJECT exception handling in iser-target for 3.10.y"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (51 commits)
  iser-target: Ignore non TEXT + LOGOUT opcodes for discovery
  target: make queue_tm_rsp() return void
  target: remove unused codes from enum tcm_tmrsp_table
  iscsi-target: kstrtou* configfs attribute parameter cleanups
  iscsi-target: Fix tfc_tpg_auth_cit configfs length overflow
  iscsi-target: Fix tfc_tpg_nacl_auth_cit configfs length overflow
  iser-target: Add support for ISCSI_OP_TEXT opcode + payload handling
  iser-target: Rename sense_buf_[dma,len] to pdu_[dma,len]
  iser-target: Add vendor_err debug output
  target: Add (obsolete) checking for PMI/LBA fields in READ CAPACITY(10)
  target: Return correct sense data for IO past the end of a device
  target: Add tracepoints for SCSI commands being processed
  iser-target: Fix session reset bug with RDMA_CM_EVENT_DISCONNECTED
  iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser
  iscsi-target: Fix iscsit_sequence_cmd reject handling for iser
  iscsi-target: Fix iscsit_add_reject* usage for iser
  iser-target: Fix isert_put_reject payload buffer post
  iscsi-target: missing kfree() on error path
  iscsi-target: Drop left-over iscsi_conn->bad_hdr
  target: Make core_scsi3_update_and_write_aptpl return sense_reason_t
  ...
2013-07-11 12:57:19 -07:00
Linus Torvalds 496322bc91 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "This is a re-do of the net-next pull request for the current merge
  window.  The only difference from the one I made the other day is that
  this has Eliezer's interface renames and the timeout handling changes
  made based upon your feedback, as well as a few bug fixes that have
  trickeled in.

  Highlights:

   1) Low latency device polling, eliminating the cost of interrupt
      handling and context switches.  Allows direct polling of a network
      device from socket operations, such as recvmsg() and poll().

      Currently ixgbe, mlx4, and bnx2x support this feature.

      Full high level description, performance numbers, and design in
      commit 0a4db187a9 ("Merge branch 'll_poll'")

      From Eliezer Tamir.

   2) With the routing cache removed, ip_check_mc_rcu() gets exercised
      more than ever before in the case where we have lots of multicast
      addresses.  Use a hash table instead of a simple linked list, from
      Eric Dumazet.

   3) Add driver for Atheros CQA98xx 802.11ac wireless devices, from
      Bartosz Markowski, Janusz Dziedzic, Kalle Valo, Marek Kwaczynski,
      Marek Puzyniak, Michal Kazior, and Sujith Manoharan.

   4) Support reporting the TUN device persist flag to userspace, from
      Pavel Emelyanov.

   5) Allow controlling network device VF link state using netlink, from
      Rony Efraim.

   6) Support GRE tunneling in openvswitch, from Pravin B Shelar.

   7) Adjust SOCK_MIN_RCVBUF and SOCK_MIN_SNDBUF for modern times, from
      Daniel Borkmann and Eric Dumazet.

   8) Allow controlling of TCP quickack behavior on a per-route basis,
      from Cong Wang.

   9) Several bug fixes and improvements to vxlan from Stephen
      Hemminger, Pravin B Shelar, and Mike Rapoport.  In particular,
      support receiving on multiple UDP ports.

  10) Major cleanups, particular in the area of debugging and cookie
      lifetime handline, to the SCTP protocol code.  From Daniel
      Borkmann.

  11) Allow packets to cross network namespaces when traversing tunnel
      devices.  From Nicolas Dichtel.

  12) Allow monitoring netlink traffic via AF_PACKET sockets, in a
      manner akin to how we monitor real network traffic via ptype_all.
      From Daniel Borkmann.

  13) Several bug fixes and improvements for the new alx device driver,
      from Johannes Berg.

  14) Fix scalability issues in the netem packet scheduler's time queue,
      by using an rbtree.  From Eric Dumazet.

  15) Several bug fixes in TCP loss recovery handling, from Yuchung
      Cheng.

  16) Add support for GSO segmentation of MPLS packets, from Simon
      Horman.

  17) Make network notifiers have a real data type for the opaque
      pointer that's passed into them.  Use this to properly handle
      network device flag changes in arp_netdev_event().  From Jiri
      Pirko and Timo Teräs.

  18) Convert several drivers over to module_pci_driver(), from Peter
      Huewe.

  19) tcp_fixup_rcvbuf() can loop 500 times over loopback, just use a
      O(1) calculation instead.  From Eric Dumazet.

  20) Support setting of explicit tunnel peer addresses in ipv6, just
      like ipv4.  From Nicolas Dichtel.

  21) Protect x86 BPF JIT against spraying attacks, from Eric Dumazet.

  22) Prevent a single high rate flow from overruning an individual cpu
      during RX packet processing via selective flow shedding.  From
      Willem de Bruijn.

  23) Don't use spinlocks in TCP md5 signing fast paths, from Eric
      Dumazet.

  24) Don't just drop GSO packets which are above the TBF scheduler's
      burst limit, chop them up so they are in-bounds instead.  Also
      from Eric Dumazet.

  25) VLAN offloads are missed when configured on top of a bridge, fix
      from Vlad Yasevich.

  26) Support IPV6 in ping sockets.  From Lorenzo Colitti.

  27) Receive flow steering targets should be updated at poll() time
      too, from David Majnemer.

  28) Fix several corner case regressions in PMTU/redirect handling due
      to the routing cache removal, from Timo Teräs.

  29) We have to be mindful of ipv4 mapped ipv6 sockets in
      upd_v6_push_pending_frames().  From Hannes Frederic Sowa.

  30) Fix L2TP sequence number handling bugs, from James Chapman."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1214 commits)
  drivers/net: caif: fix wrong rtnl_is_locked() usage
  drivers/net: enic: release rtnl_lock on error-path
  vhost-net: fix use-after-free in vhost_net_flush
  net: mv643xx_eth: do not use port number as platform device id
  net: sctp: confirm route during forward progress
  virtio_net: fix race in RX VQ processing
  virtio: support unlocked queue poll
  net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bit
  Documentation: Fix references to defunct linux-net@vger.kernel.org
  net/fs: change busy poll time accounting
  net: rename low latency sockets functions to busy poll
  bridge: fix some kernel warning in multicast timer
  sfc: Fix memory leak when discarding scattered packets
  sit: fix tunnel update via netlink
  dt:net:stmmac: Add dt specific phy reset callback support.
  dt:net:stmmac: Add support to dwmac version 3.610 and 3.710
  dt:net:stmmac: Allocate platform data only if its NULL.
  net:stmmac: fix memleak in the open method
  ipv6: rt6_check_neigh should successfully verify neigh if no NUD information are available
  net: ipv6: fix wrong ping_v6_sendmsg return value
  ...
2013-07-09 18:24:39 -07:00
Roland Dreier 0eba551148 Merge branches 'af_ib', 'cxgb4', 'misc', 'mlx5', 'ocrdma', 'qib' and 'srp' into for-next 2013-07-08 11:22:11 -07:00
Roland Dreier da183c7af8 IB/uverbs: Use get_unused_fd_flags(O_CLOEXEC) instead of get_unused_fd()
The macro get_unused_fd() is used to allocate a file descriptor with
default flags.  Those default flags (0) can be "unsafe": O_CLOEXEC must
be used by default to not leak file descriptor across exec().

Replace calls to get_unused_fd() in uverbs with calls to
get_unused_fd_flags(O_CLOEXEC).  Inheriting uverbs fds across exec()
cannot be used to do anything useful.

Based on a patch/suggestion from Yann Droneaud <ydroneaud@opteya.com>.

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-08 11:15:45 -07:00
Roland Dreier ad32b95f82 IB/mlx5: Make profile[] static in main.c
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-08 10:32:32 -07:00
Eli Cohen e126ba97db mlx5: Add driver for Mellanox Connect-IB adapters
The driver is comprised of two kernel modules: mlx5_ib and mlx5_core.
This partitioning resembles what we have for mlx4, except that mlx5_ib
is the pci device driver and not mlx5_core.

mlx5_core is essentially a library that provides general functionality
that is intended to be used by other Mellanox devices that will be
introduced in the future.  mlx5_ib has a similar role as any hardware
device under drivers/infiniband/hw.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>

[ Merge in coccinelle fixes from Fengguang Wu <fengguang.wu@intel.com>.
  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-08 10:32:24 -07:00
Nicholas Bellinger ca40d24eb8 iser-target: Ignore non TEXT + LOGOUT opcodes for discovery
This patch adds a check in isert_rx_opcode() to ignore non TEXT + LOGOUT
opcodes when SessionType=Discovery has been negotiated.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:37:02 -07:00
Joern Engel b79fafac70 target: make queue_tm_rsp() return void
The return value wasn't checked by any of the callers.  Assuming this is
correct behaviour, we can simplify some code by not bothering to
generate it.

nab: Add srpt_queue_data_in() + srpt_queue_tm_rsp() nops around
     srpt_queue_response() void return

Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:36:53 -07:00
Nicholas Bellinger adb54c2931 iser-target: Add support for ISCSI_OP_TEXT opcode + payload handling
This patch adds isert_handle_text_cmd() to handle incoming
ISCSI_OP_TEXT PDU processing, along with isert_put_text_rsp()
for posting ISCSI_OP_TEXT_RSP ib_send_wr response.

It copies ISCSI_OP_TEXT payload using unsolicited payload at
&iser_rx_desc->data[0] into iscsi_cmd->text_in_ptr for usage
with outgoing isert_put_text_rsp() -> iscsit_build_text_rsp()

v2 changes:
  - Let iscsit_build_text_rsp() determine any extra padding

Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:36:48 -07:00
Nicholas Bellinger dbbc5d1107 iser-target: Rename sense_buf_[dma,len] to pdu_[dma,len]
Now that these two variables are used for REJECT payloads as well
as SCSI response sense payloads, rename them to something that
makes more sense.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:36:47 -07:00
Nicholas Bellinger c5a2adbfcb iser-target: Add vendor_err debug output
Add output for ib_wc.vendor_err in isert_cq_[t,r]x_work(), which
is useful for debugging future issues.

Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:36:46 -07:00
Nicholas Bellinger b2cb96494d iser-target: Fix session reset bug with RDMA_CM_EVENT_DISCONNECTED
This patch addresses a bug where RDMA_CM_EVENT_DISCONNECTED may occur
before the connection shutdown has been completed by rx/tx threads,
that causes isert_free_conn() to wait indefinately on ->conn_wait.

This patch allows isert_disconnect_work code to invoke rdma_disconnect
when isert_disconnect_work() process context is started by client
session reset before isert_free_conn() code has been reached.

It also adds isert_conn->conn_mutex protection for ->state within
isert_disconnect_work(), isert_cq_comp_err() and isert_free_conn()
code, along with isert_check_state() for wait_event usage.

(v2: Add explicit iscsit_cause_connection_reinstatement call
     during isert_disconnect_work() to force conn reset)

Cc: stable@vger.kernel.org  # 3.10+
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:35:56 -07:00
Nicholas Bellinger 186a964701 iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser
This patch adds target_get_sess_cmd reference counting for
iscsit_handle_task_mgt_cmd(), and adds a target_put_sess_cmd()
for the failure case.

It also fixes a bug where ISCSI_OP_SCSI_TMFUNC type commands
where leaking iscsi_cmd->i_conn_node and eventually triggering
an OOPs during struct isert_conn shutdown.

Cc: stable@vger.kernel.org  # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-06 22:01:23 -07:00
Nicholas Bellinger 561bf15892 iscsi-target: Fix iscsit_sequence_cmd reject handling for iser
This patch moves ISCSI_OP_REJECT failures into iscsit_sequence_cmd()
in order to avoid external iscsit_reject_cmd() reject usage for all
PDU types.

It also updates PDU specific handlers for traditional iscsi-target
code to not reset the session after posting a ISCSI_OP_REJECT during
setup.

(v2: Fix CMDSN_LOWER_THAN_EXP for ISCSI_OP_SCSI to call
     target_put_sess_cmd() after iscsit_sequence_cmd() failure)

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@vger.kernel.org  # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-06 21:59:54 -07:00
Nicholas Bellinger ba15991408 iscsi-target: Fix iscsit_add_reject* usage for iser
This patch changes iscsit_add_reject() + iscsit_add_reject_from_cmd()
usage to not sleep on iscsi_cmd->reject_comp to address a free-after-use
usage bug in v3.10 with iser-target code.

It saves ->reject_reason for use within iscsit_build_reject() so the
correct value for both transport cases.  It also drops the legacy
fail_conn parameter usage throughput iscsi-target code and adds
two iscsit_add_reject_cmd() and iscsit_reject_cmd helper functions,
along with various small cleanups.

(v2: Re-enable target_put_sess_cmd() to be called from
     iscsit_add_reject_from_cmd() for rejects invoked after
     target_get_sess_cmd() has been called)

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@vger.kernel.org  # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-06 21:59:53 -07:00
Nicholas Bellinger 3df8f68aaf iser-target: Fix isert_put_reject payload buffer post
This patch adds the missing isert_put_reject() logic to post
a outgoing payload buffer to hold the 48 bytes of original PDU
header request payload for the rejected cmd.

It also fixes ISTATE_SEND_REJECT handling in isert_response_completion()
-> isert_do_control_comp() code, and drops incorrect iscsi_cmd_t->reject_comp
usage.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@vger.kernel.org  # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-06 21:59:35 -07:00
Linus Torvalds 74b9272bbe Device tree updates for v3.11
This branch contains the following changes:
 - Removal of CONFIG_OF_DEVICE, it is always enabled by CONFIG_OF
 - Remove #ifdef from linux/of_platform.h to increase compiler syntax
   coverage
 - Bug fix for address decoding on Bimini and js2x powerpc platforms.
 - miscellaneous binding changes
 
 One note on the above. The binding changes going in from all kinds of
 different trees has gotten rather out of hand. I picked up some during
 this cycle, but even going though my tree isn't a great fit. Ian
 Campbell has prototyped splitting the bindings and .dtb files into a
 separate repository. The plan is to migrate to using that sometime in
 the next few kernel releases which should get rid of a lot of the churn
 on binding docs and .dts files.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux

Pull device tree updates from Grant Likely:
 "This branch contains the following changes:
   - Removal of CONFIG_OF_DEVICE, it is always enabled by CONFIG_OF
   - Remove #ifdef from linux/of_platform.h to increase compiler syntax
     coverage
   - Bug fix for address decoding on Bimini and js2x powerpc platforms.
   - miscellaneous binding changes

  One note on the above.  The binding changes going in from all kinds of
  different trees has gotten rather out of hand.  I picked up some
  during this cycle, but even going though my tree isn't a great fit.

  Ian Campbell has prototyped splitting the bindings and .dtb files into
  a separate repository.  The plan is to migrate to using that sometime
  in the next few kernel releases which should get rid of a lot of the
  churn on binding docs and .dts files"

* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
  of: Fix address decoding on Bimini and js2x machines
  of: remove CONFIG_OF_DEVICE
  usb: chipidea: depend on CONFIG_OF instead of CONFIG_OF_DEVICE
  of: remove of_platform_driver
  ibmebus: convert of_platform_driver to platform_driver
  driver core: move to_platform_driver to platform_device.h
  mfd: DT bindings for the palmas family MFD
  ARM: dts: omap3-devkit8000: fix NAND memory binding
  of/base: fix typos
  of: remove #ifdef from linux/of_platform.h
2013-07-04 15:51:45 -07:00
Linus Torvalds 80cc38b163 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
 "The usual stuff from trivial tree"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
  treewide: relase -> release
  Documentation/cgroups/memory.txt: fix stat file documentation
  sysctl/net.txt: delete reference to obsolete 2.4.x kernel
  spinlock_api_smp.h: fix preprocessor comments
  treewide: Fix typo in printk
  doc: device tree: clarify stuff in usage-model.txt.
  open firmware: "/aliasas" -> "/aliases"
  md: bcache: Fixed a typo with the word 'arithmetic'
  irq/generic-chip: fix a few kernel-doc entries
  frv: Convert use of typedef ctl_table to struct ctl_table
  sgi: xpc: Convert use of typedef ctl_table to struct ctl_table
  doc: clk: Fix incorrect wording
  Documentation/arm/IXP4xx fix a typo
  Documentation/networking/ieee802154 fix a typo
  Documentation/DocBook/media/v4l fix a typo
  Documentation/video4linux/si476x.txt fix a typo
  Documentation/virtual/kvm/api.txt fix a typo
  Documentation/early-userspace/README fix a typo
  Documentation/video4linux/soc-camera.txt fix a typo
  lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment
  ...
2013-07-04 11:40:58 -07:00
Kees Cook 02aa2a3763 drivers: avoid format string in dev_set_name
Calling dev_set_name with a single paramter causes it to be handled as a
format string.  Many callers are passing potentially dynamic string
content, so use "%s" in those cases to avoid any potential accidents,
including wrappers like device_create*() and bdi_register().

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-03 16:07:41 -07:00
Vu Pham e8ca413558 IB/srp: Bump driver version and release date
Signed-off-by: Vu Pham <vu@mellanox.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-01 10:42:02 -07:00
Bart Van Assche 4b5e5f41c8 IB/srp: Make HCA completion vector configurable
Several InfiniBand HCAs allow configuring the completion vector per
CQ.  This allows spreading the workload created by IB completion
interrupts over multiple MSI-X vectors and hence over multiple CPU
cores.  In other words, configuring the completion vector properly not
only allows reducing latency on an initiator connected to multiple
SRP targets but also allows improving throughput.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-01 10:40:55 -07:00
Bart Van Assche 96fc248a4c IB/srp: Maintain a single connection per I_T nexus
An SRP target is required to maintain a single connection between
initiator and target.  This means that if the 'add_target' attribute
is used to create a second connection to a target, the first
connection will be logged out and that the SCSI error handler will
kick in.  The SCSI error handler will cause the SRP initiator to
reconnect, which will cause I/O over the second connection to fail.
Avoid such ping-pong behavior by disabling relogins.

If reconnecting manually is necessary, that is possible by deleting
and recreating an rport via sysfs.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-01 10:40:07 -07:00
Bart Van Assche 99e1c1398f IB/srp: Fail I/O fast if target offline
If reconnecting failed we know that no command completion will
be received anymore.  Hence let the SCSI error handler fail such
commands immediately.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-07-01 10:37:13 -07:00
Bart Van Assche 2742c1dadd IB/srp: Skip host settle delay
The SRP initiator implements host reset by reconnecting to the SRP
target.  That means that communication with the target is possible as
soon as host reset finished. Hence skip the host settle delay.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-27 16:44:39 -07:00
Bart Van Assche 086f44f588 IB/srp: Avoid skipping srp_reset_host() after a transport error
The SCSI error handler assumes that the transport layer is operational
if an eh_abort_handler() returns SUCCESS.  Hence srp_abort() only
should return SUCCESS if sending the ABORT TASK task management
function succeeded.  This patch avoids the SCSI error handler skipping
the srp_reset_host() call after a transport layer error.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-27 16:44:39 -07:00
Dotan Barak 1fe0cb8488 IB/srp: Fix remove_one crash due to resource exhaustion
If the add_one callback fails during driver load no resources are
allocated so there isn't a need to release any resources. Trying
to clean the resource may lead to the following kernel panic:

    BUG: unable to handle kernel NULL pointer dereference at (null)
    IP: [<ffffffffa0132331>] srp_remove_one+0x31/0x240 [ib_srp]
    RIP: 0010:[<ffffffffa0132331>]  [<ffffffffa0132331>] srp_remove_one+0x31/0x240 [ib_srp]
    Process rmmod (pid: 4562, threadinfo ffff8800dd738000, task ffff8801167e60c0)
    Call Trace:
     [<ffffffffa024500e>] ib_unregister_client+0x4e/0x120 [ib_core]
     [<ffffffffa01361bd>] srp_cleanup_module+0x15/0x71 [ib_srp]
     [<ffffffff810ac6a4>] sys_delete_module+0x194/0x260
     [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Reviewed-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-27 16:44:38 -07:00
Mitko Haralanov 22baa407f9 IB/qib: New transmitter tunning settings for Dell 1.1 backplane
The Dell blade chassis got an updated backplane which requires new
transmitter tuning settings.

Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-26 09:27:50 -07:00
Nicholas Bellinger 778de36896 iscsi/isert-target: Refactor ISCSI_OP_NOOP RX handling
This patch refactors ISCSI_OP_NOOP handling within iscsi-target in
order to handle iscsi_nopout payloads in a transport specific manner.

This includes splitting existing iscsit_handle_nop_out() into
iscsit_setup_nop_out() and iscsit_process_nop_out() calls, and
makes iscsit_handle_nop_out() be only used internally by traditional
iscsi socket calls.

Next update iser-target code to use new callers and add FIXME for
the handling iscsi_nopout payloads.  Also fix reject response handling
in iscsit_setup_nop_out() to use proper iscsit_add_reject_from_cmd().

v2: Fix uninitialized iscsit_handle_nop_out() payload_length usage (Fengguang)
v3: Remove left-over dead code in iscsit_setup_nop_out() (DanC)

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-06-24 22:35:51 -07:00
Wei Yongjun 80b15043e3 IB/core: Fix error return code in add_port()
Fix to return -ENOMEM in the add_port() error handling case instead of
0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-24 13:52:22 -07:00
Wei Yongjun c94e15c5cb RDMA/ocrdma: Fix error return code in ocrdma_set_create_qp_rq_cmd()
Fix to return -ENOMEM in the alloc dma coherent error case instead of
0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-24 13:50:45 -07:00
Mike Marciniszyn 1dd173b01f IB/qib: Add qp_stats debug file
This adds a seq_file iterator for reporting the QP hash table when the
qp_stats file is read.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:52 -07:00
Mike Marciniszyn 17db3a92c1 IB/qib: Add per-context stats interface
This patch adds a debugfs stats interface for per kernel contexts
packet counts.

The code uses the opcode stats count and eliminates the counter in the
context.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:51 -07:00
Mike Marciniszyn ddb8876589 IB/qib: Convert opcode counters to per-context
This fix changes the opcode relative counters for receive to per
context.

Profiling has shown that when mulitple contexts are being used there
is a lot of cache activity associated with these counters.

The code formerly kept these counters per port, but only provided the
interface to read per HCA.  This patch converts the read of counters
to per HCA and adds the debugfs hooks to be able to read the file as a
sequence of opcodes.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:50 -07:00
Mike Marciniszyn 85caafe307 IB/qib: Optimize CQ callbacks
The current workqueue implemention has the following performance
deficiencies on QDR HCAs:

- The CQ call backs tend to run on the CPUs processing the
  receive queues
- The single thread queue isn't optimal for multiple HCAs

This patch adds a dedicated per HCA bound thread to process CQ callbacks.

Reviewed-by: Ramkrishna Vepa <ramkrishna.vepa@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:49 -07:00
Ramkrishna Vepa c804f07248 IB/qib: Add dual-rail NUMA awareness for PSM processes
The driver currently selects a HCA based on the algorithm that PSM
chooses, contexts within a HCA or across. The HCA can also be chosen
by the user. Either way, this patch assigns a CPU on the NUMA node
local to the selected HCA. This patch also tries to select the HCA
closest to the NUMA node of the CPU assigned via taskset to PSM
process. If this HCA is unusable then another unit is selected based
on the algorithm that is currently enforced or selected by PSM - round
robin context selection 'within' or 'across' HCA's.

Fixed a bug wherein contexts are setup on the NUMA node on which the
processes are opened (setup_ctxt()) and not on the NUMA node that the
driver recommends the CPU on.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Ramkrishna Vepa <ramkrishna.vepa@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:49 -07:00
Ramkrishna Vepa e0f30baca1 IB/qib: Add optional NUMA affinity
This patch adds context relative numa affinity conditioned on the
module parameter numa_aware. The qib_ctxtdata has an additional
node_id member and qib_create_ctxtdata() has an addition node_id
parameter.

The allocations within the hdr queue and eager queue setup routines
now take this additional member and adjust allocations as necesary.
PSM will pass the either current numa node or the node closest to the
HCA depending on numa_aware. Verbs will always use the node closest to
the HCA.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Ramkrishna Vepa <ramkrishna.vepa@intel.com>
Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:48 -07:00
Vinit Agnihotri ab4a13d69b IB/qib: Update minor version number
External PSM repositories have advanced the minor number for a variety
of reasons. The driver needs to increase to avoid warnings.

Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:47 -07:00
Mike Marciniszyn f7cf9a618b IB/qib: Remove atomic_inc_not_zero() from QP RCU
Follow Documentation/RCU/rcuref.txt guidance in removing
atomic_inc_not_zero() from QP RCU implementation.

This patch also removes an unneeded synchronize_rcu() in the add path.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:46 -07:00
Mike Marciniszyn 8469ba39a6 IB/qib: Add DCA support
This patch adds DCA cache warming for systems that support DCA.

The code uses cpu affinity notification to react to an affinity change
from a user mode program like irqbalance and (re-)program the chip
accordingly. This notification avoids reading the current cpu on every
interrupt.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>

[ Add Kconfig dependency on SMP && GENERIC_HARDIRQS to avoid failure to
  build due to undefined struct irq_affinity_notify.  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-21 17:19:38 -07:00
Sean Hefty ce117ffac2 RDMA/cma: Export AF_IB statistics
Report AF_IB source and destination addresses through netlink
interface.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:45 -07:00
Sean Hefty 5bc2b7b397 RDMA/ucma: Allow user space to specify AF_IB when joining multicast
Allow user space applications to join multicast groups using MGIDs
directly.  MGIDs may be passed using AF_IB addresses.  Since the
current multicast join command only supports addresses as large as
sockaddr_in6, define a new structure for joining addresses specified
using sockaddr_ib.

Since AF_IB allows the user to specify the qkey when resolving a
remote UD QP address, when joining the multicast group use the qkey
value, if one has been assigned.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:45 -07:00
Sean Hefty 209cf2a751 RDMA/ucma: Allow user space to pass AF_IB into resolve
Allow user space applications to call resolve_addr using AF_IB.  To
support sockaddr_ib, we need to define a new structure capable of
handling the larger address size.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:44 -07:00
Sean Hefty eebe4c3a62 RDMA/ucma: Allow user space to bind to AF_IB
Support user space binding to addresses using AF_IB.  Since
sockaddr_ib is larger than sockaddr_in6, we need to define a larger
structure when binding using AF_IB.  This time we use sockaddr_storage
to cover future cases.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:43 -07:00
Sean Hefty 05ad94577e RDMA/ucma: Name changes to indicate only IP addresses supported
Several commands into the RDMA CM from user space are restricted to
supporting addresses which fit into a sockaddr_in6 structure: bind
address, resolve address, and join multicast.

With the addition of AF_IB, we need to support addresses which are
larger than sockaddr_in6.  This will be done by adding new commands
that exchange address information using sockaddr_storage.  However, to
support existing applications, we maintain the current commands and
structures, but rename them to indicate that they only support IPv4
and v6 addresses.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:42 -07:00
Sean Hefty edaa7a5578 RDMA/ucma: Add ability to query GID addresses
Part of address resolution is mapping IP addresses to IB GIDs.  With
the changes to support querying larger addresses and more path records,
also provide a way to query IB GIDs after resolution completes.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:42 -07:00
Sean Hefty cf53936f22 RDMA/cma: Export cma_get_service_id()
Allow the rdma_ucm to query the IB service ID formed or allocated by
the rdma_cm by exporting the cma_get_service_id() functionality.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:41 -07:00
Sean Hefty ac53b264b2 RDMA/ucma: Support querying when IB paths are not reversible
The current query_route call can return up to two path records.  The
assumption being that one is the primary path, with optional support
for an alternate path.  In both cases, the paths are assumed to be
reversible and are used to send CM MADs.

With the ability to manually set IB path data, the rdma cm can
eventually be capable of using up to 6 paths per connection:

	forward primary, reverse primary,
	forward alternate, reverse alternate,
	reversible primary path for CM MADs
	reversible alternate path for CM MADs.

(It is unclear at this time if IB routing will complicate this)  In
order to handle more flexible routing topologies, add a new command to
report any number of paths.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:40 -07:00
Sean Hefty 2e08b5879e IB/sa: Export function to pack a path record into wire format
Allow converting from struct ib_sa_path_rec to the IB defined SA path
record wire format.  This will be used to report path data from the
rdma cm into user space.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:39 -07:00
Sean Hefty ee7aed4528 RDMA/ucma: Support querying for AF_IB addresses
The sockaddr structure for AF_IB is larger than sockaddr_in6.  The
rdma cm user space ABI uses the latter to exchange address information
between user space and the kernel.

To support querying for larger addresses, define a new query command
that exchanges data using sockaddr_storage, rather than sockaddr_in6.
Unlike the existing query_route command, the new command only returns
address information.  Route (i.e. path record) data is separated.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:39 -07:00
Sean Hefty 94d0c93941 RDMA/cma: Only listen on IB devices when using AF_IB
If an rdma_cm_id is bound to AF_IB, with a wild card address, only
listen on IB devices.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:38 -07:00
Sean Hefty 5c438135ad RDMA/cma: Set qkey for AF_IB
Allow the user to specify the qkey when using AF_IB.  The qkey is
added to struct rdma_ucm_conn_param in place of a reserved field, but
for backwards compatability, is only accessed if the associated
rdma_cm_id is using AF_IB.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:37 -07:00
Sean Hefty e8160e1593 RDMA/cma: Expose private data when using AF_IB
If the source or destination address is AF_IB, then do not reserve a
portion of the private data in the IB CM REQ or SIDR REQ messages for
the cma header.  Instead, all private data should be exported to the
user.  When AF_IB is used, the rdma cm does not have sufficient
information to fill in the cma header.  Additionally, this will be
necessary to support any IB connection through the rdma cm interface,

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:36 -07:00
Sean Hefty fbaa1a6d85 RDMA/cma: Merge cma_get/save_net_info
With the removal of SDP related code, we can merge cma_get_net_info()
with cma_save_net_info(), since we're only ever dealing with a single
header format.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 23:35:29 -07:00
Sean Hefty 01602f113f RDMA/cma: Remove unused SDP related code
The SDP protocol was never merged upstream.  Remove unused SDP related
code from the RDMA CM.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:05 -07:00
Sean Hefty 496ce3ce17 RDMA/cma: Add support for AF_IB to cma_get_service_id()
cma_get_service_id() forms the service ID based on the port space and
port number of the rdma_cm_id.  Extend the call to support AF_IB,
which contains the service ID directly.  This will be needed to
support any arbitrary SID.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:05 -07:00
Sean Hefty f68194ca88 RDMA/cma: Add support for AF_IB to rdma_resolve_route()
Allow rdma_resolve_route() to handle the case where the user specified
the source and destination addresses using AF_IB.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:04 -07:00
Sean Hefty f17df3b0de RDMA/cma: Add support for AF_IB to rdma_resolve_addr()
Allow the user to specify the remote address using AF_IB format.  When
AF_IB is used, the remote address simply needs to be recorded, and no
resolution using ARP is done.  The local address may still need to be
matched with a local IB device.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:04 -07:00
Sean Hefty 4ae7152e0b RDMA/cma: Verify that source and dest sa_family are the same
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:04 -07:00
Sean Hefty b0569e4075 RDMA/cma: Restrict AF_IB loopback to binding to IB devices only
If a user specifies AF_IB as the source address for a loopback
connection, limit the resolution to IB devices only.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:04 -07:00
Sean Hefty f4753834b5 RDMA/cma: Add helper functions to return id address information
Provide inline helpers to extract source and destination address data
from the rdma_cm_id.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:04 -07:00
Sean Hefty 6a3e362d3c RDMA/cma: Do not modify sa_family when setting loopback address
cma_resolve_loopback is called after an rdma_cm_id has been
bound to a specific sa_family and port.  Once the
source sa_family for the id has been set, do not modify it.
Only the actual IP address portion of the source address
needs to be set.

As part of this fix, we can simplify setting the source address
by moving the loopback address assignment from cma_resolve_loopback
to cma_bind_loopback.  cma_bind_loopback is only invoked when
the source address is the loopback address.

Finally, add loopback support for AF_IB as part of the change.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:03 -07:00
Sean Hefty 680f920a2e RDMA/cma: Allow user to specify AF_IB when binding
Modify rdma_bind_addr to allow the user to specify AF_IB when binding
to a device.  AF_IB indicates that the user is not mapping an IP
address to the native IB addressing.  (The mapping may have already
been done, or is not needed)

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:03 -07:00
Sean Hefty 58afdcb738 RDMA/cma: Update port reservation to support AF_IB
The AF_IB uses a 64-bit service id (SID), which the user can control
through the use of a mask.  The rdma_cm will assign values to the
unmasked portions of the SID based on the selected port space and port
number.

Because the IB spec divides the SID range into several regions, a
SID/mask combination may fall into one of the existing port space
ranges as defined by the RDMA CM IP Annex.  Map the AF_IB SID to the
correct RDMA port space.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:03 -07:00
Sean Hefty ef560861c0 IB/addr: Add AF_IB support to ip_addr_size
Add support for AF_IB to ip_addr_size, and rename the function to
account for the change.  Give the compiler more control over whether
the call should be inline or not by moving the definition into the .c
file, removing the static inline, and exporting it.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:02 -07:00
Sean Hefty 2e2d190c5e RDMA/cma: Include AF_IB in loopback and any address checks
Enhance checks for loopback and any address to support AF_IB in
addition to AF_INET and AF_INT6.  This will allow future patches to
use AF_IB when binding and resolving addresses.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:02 -07:00
Sean Hefty c8dea2f9f0 RDMA/cma: Allow enabling reuseaddr in any state
The rdma_cm only allows setting reuseaddr if the corresponding
rdma_cm_id is in the idle state.  Allow setting this value in other
states.  This brings the behavior more inline with sockets.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 13:08:01 -07:00
Naresh Gottumukkala 9884bcdca3 RDMA/ocrdma: Reorg structures to avoid padding
Reorg structures to better packing to avoid cacheline padding.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:15 -07:00
Naresh Gottumukkala df176ea074 RDMA/ocrdma: Change macros to inline funtions
Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:14 -07:00
Naresh Gottumukkala f6ddcf7107 RDMA/ocrdma: Set bad_wr in error case
Fix post_send to set the bad_wr in error case.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:14 -07:00
Naresh Gottumukkala ef99c4c2ed RDMA/ocrdma: Replace ocrdma_err with pr_err
Remove private macro ocrdma_err and replace with standard pr_err.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:14 -07:00
Naresh Gottumukkala b1d58b9919 RDMA/ocrdma: Use MCC_CREATE_EXT_V1 for MCC create
Use MCC_CREATE_EXT_V1 to create MCC_queue to receive RoCE events.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:14 -07:00
Gottumukkala, Naresh 27159f5087 RDMA/ocrdma: Remove use_cnt for queues
Remove use_cnt.  Rely on IB midlayer to keep track of the use count.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:13 -07:00
Wei Yongjun f29fa1cf34 IB/ehca: Fix error return code in ehca_create_slab_caches()
Fix to return -ENOMEM in the kmem_cache_create() error handling
case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:52:04 -07:00
Dan Carpenter 21bfd47062 RDMA/cxgb3: Timeout condition is never true
This is a static checker fix.  "count" is unsigned so it's never -1.
Since "count" is 16 bits and the addition operation is implicitly
casted to int then there is no wrapping here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-20 04:51:52 -07:00
David S. Miller d98cae64e4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/wireless/ath/ath9k/Kconfig
	drivers/net/xen-netback/netback.c
	net/batman-adv/bat_iv_ogm.c
	net/wireless/nl80211.c

The ath9k Kconfig conflict was a change of a Kconfig option name right
next to the deletion of another option.

The xen-netback conflict was overlapping changes involving the
handling of the notify list in xen_netbk_rx_action().

Batman conflict resolution provided by Antonio Quartulli, basically
keep everything in both conflict hunks.

The nl80211 conflict is a little more involved.  In 'net' we added a
dynamic memory allocation to nl80211_dump_wiphy() to fix a race that
Linus reported.  Meanwhile in 'net-next' the handlers were converted
to use pre and post doit handlers which use a flag to determine
whether to hold the RTNL mutex around the operation.

However, the dump handlers to not use this logic.  Instead they have
to explicitly do the locking.  There were apparent bugs in the
conversion of nl80211_dump_wiphy() in that we were not dropping the
RTNL mutex in all the return paths, and it seems we very much should
be doing so.  So I fixed that whilst handling the overlapping changes.

To simplify the initial returns, I take the RTNL mutex after we try
to allocate 'tb'.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-19 16:49:39 -07:00
Rob Herring c45640e4a9 ibmebus: convert of_platform_driver to platform_driver
ibmebus is the last remaining user of of_platform_driver and the
conversion to a regular platform driver is trivial.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-06-12 12:37:26 +01:00
David S. Miller 6bc19fb82d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Merge 'net' bug fixes into 'net-next' as we have patches
that will build on top of them.

This merge commit includes a change from Emil Goode
(emilgoode@gmail.com) that fixes a warning that would
have been introduced by this merge.  Specifically it
fixes the pingv6_ops method ipv6_chk_addr() to add a
"const" to the "struct net_device *dev" argument and
likewise update the dummy_ipv6_chk_addr() declaration.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-05 16:37:30 -07:00
Roland Dreier c9a2433a90 Merge branches 'iser' and 'qib' into for-next 2013-06-04 17:06:46 -07:00
Mike Marciniszyn f3bdf34465 IB/qib: Fix lockdep splat in qib_alloc_lkey()
The following backtrace is reported with CONFIG_PROVE_RCU:

    drivers/infiniband/hw/qib/qib_keys.c:64 suspicious rcu_dereference_check() usage!
    other info that might help us debug this:
    rcu_scheduler_active = 1, debug_locks = 1
    4 locks held by kworker/0:1/56:
    #0:  (events){.+.+.+}, at: [<ffffffff8107a4f5>] process_one_work+0x165/0x4a0
    #1:  ((&wfc.work)){+.+.+.}, at: [<ffffffff8107a4f5>] process_one_work+0x165/0x4a0
    #2:  (device_mutex){+.+.+.}, at: [<ffffffffa0148dd8>] ib_register_device+0x38/0x220 [ib_core]
    #3:  (&(&dev->lk_table.lock)->rlock){......}, at: [<ffffffffa017e81c>] qib_alloc_lkey+0x3c/0x1b0 [ib_qib]

    stack backtrace:
    Pid: 56, comm: kworker/0:1 Not tainted 3.10.0-rc1+ #6
    Call Trace:
    [<ffffffff810c0b85>] lockdep_rcu_suspicious+0xe5/0x130
    [<ffffffffa017e8e1>] qib_alloc_lkey+0x101/0x1b0 [ib_qib]
    [<ffffffffa0184886>] qib_get_dma_mr+0xa6/0xd0 [ib_qib]
    [<ffffffffa01461aa>] ib_get_dma_mr+0x1a/0x50 [ib_core]
    [<ffffffffa01678dc>] ib_mad_port_open+0x12c/0x390 [ib_mad]
    [<ffffffff810c2c55>] ?  trace_hardirqs_on_caller+0x105/0x190
    [<ffffffffa0167b92>] ib_mad_init_device+0x52/0x110 [ib_mad]
    [<ffffffffa01917c0>] ?  sl2vl_attr_show+0x30/0x30 [ib_qib]
    [<ffffffffa0148f49>] ib_register_device+0x1a9/0x220 [ib_core]
    [<ffffffffa01b1685>] qib_register_ib_device+0x735/0xa40 [ib_qib]
    [<ffffffff8106ba98>] ? mod_timer+0x118/0x220
    [<ffffffffa017d425>] qib_init_one+0x1e5/0x400 [ib_qib]
    [<ffffffff812ce86e>] local_pci_probe+0x4e/0x90
    [<ffffffff81078118>] work_for_cpu_fn+0x18/0x30
    [<ffffffff8107a566>] process_one_work+0x1d6/0x4a0
    [<ffffffff8107a4f5>] ?  process_one_work+0x165/0x4a0
    [<ffffffff8107c9c9>] worker_thread+0x119/0x370
    [<ffffffff8107c8b0>] ?  manage_workers+0x180/0x180
    [<ffffffff8108294e>] kthread+0xee/0x100
    [<ffffffff81082860>] ?  __init_kthread_worker+0x70/0x70
    [<ffffffff815c04ac>] ret_from_fork+0x7c/0xb0
    [<ffffffff81082860>] ?  __init_kthread_worker+0x70/0x70

Per Documentation/RCU/lockdep-splat.txt, the code now uses rcu_access_pointer()
vs. rcu_dereference().

Reported-by: Jay Fenlason <fenlason@redhat.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-04 17:05:20 -07:00
Or Gerlitz 28f292e879 IB/iser: Add Mellanox copyright
Add Mellanox copyright to the iser initiator source code which I maintain.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-04 17:03:12 -07:00
Roi Dayan 5b61ff43a7 IB/iser: Fix device removal flow
Change the code to destroy the "last opened" rdma_cm id after making
sure we released all other objects (QP, CQs, PD, etc) associated with
the IB device.

Since iser accesses the IB device using the rdma_cm id, we need to
free any objects that are related to the device that is associated
with the rdma_cm id prior to destroying that id.  When this isn't
done, the low level driver that created this device can be unloaded
before iser has a chance to free all the objects and a such a call may
invoke code segment which isn't valid any more and crash.

Cc: Sean Hefty <sean.hefty@intel.com
Signed-off-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-06-04 17:03:11 -07:00
Nicholas Bellinger 1d19f7800d ib_srpt: Call target_sess_cmd_list_set_waiting during shutdown_session
Given that srpt_release_channel_work() calls target_wait_for_sess_cmds()
to allow outstanding se_cmd_t->cmd_kref a change to complete, the call
to perform target_sess_cmd_list_set_waiting() needs to happen in
srpt_shutdown_session()

Also, this patch adds an explicit call to srpt_shutdown_session() within
srpt_drain_channel() so that target_sess_cmd_list_set_waiting() will be
called in the cases where TFO->shutdown_session() is not triggered
directly by TCM.

Cc: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-29 21:30:46 -07:00
Jiri Pirko 351638e7de net: pass info struct via netdevice notifier
So far, only net_device * could be passed along with netdevice notifier
event. This patch provides a possibility to pass custom structure
able to provide info that event listener needs to know.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>

v2->v3: fix typo on simeth
	shortened dev_getter
	shortened notifier_info struct name
v1->v2: fix notifier_call parameter in call_netdevice_notifier()
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-28 13:11:01 -07:00
Masanari Iida 8b513d0cf6 treewide: Fix typo in printk
Correct spelling typo in various part of drivers

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-28 12:02:13 +02:00
Joern Engel be646c2d2b target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmds
Drop unused transport_wait_for_tasks() check in target_wait_for_sess_cmds
shutdown code, and convert tcm_qla2xxx + ib_srpt fabric drivers.

Cc: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-05-20 21:44:10 -07:00
Linus Torvalds e0fd9affeb InfiniBand/RDMA changes for the 3.10 merge window:
- XRC transport fixes
  - Fix DHCP on IPoIB
  - mlx4 preparations for flow steering
  - iSER fixes
  - miscellaneous other fixes
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull InfiniBand/RDMA changes from Roland Dreier:
 - XRC transport fixes
 - Fix DHCP on IPoIB
 - mlx4 preparations for flow steering
 - iSER fixes
 - miscellaneous other fixes

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (23 commits)
  IB/iser: Add support for iser CM REQ additional info
  IB/iser: Return error to upper layers on EAGAIN registration failures
  IB/iser: Move informational messages from error to info level
  IB/iser: Add module version
  mlx4_core: Expose a few helpers to fill DMFS HW strucutures
  mlx4_core: Directly expose fields of DMFS HW rule control segment
  mlx4_core: Change a few DMFS fields names to match firmare spec
  mlx4: Match DMFS promiscuous field names to firmware spec
  mlx4_core: Move DMFS HW structs to common header file
  IB/mlx4: Set link type for RAW PACKET QPs in the QP context
  IB/mlx4: Disable VLAN stripping for RAW PACKET QPs
  mlx4_core: Reduce warning message for SRQ_LIMIT event to debug level
  RDMA/iwcm: Don't touch cmid after dropping reference
  IB/qib: Correct qib_verbs_register_sysfs() error handling
  IB/ipath: Correct ipath_verbs_register_sysfs() error handling
  RDMA/cxgb4: Fix SQ allocation when on-chip SQ is disabled
  SRPT: Fix odd use of WARN_ON()
  IPoIB: Fix ipoib_hard_header() return value
  RDMA: Rename random32() to prandom_u32()
  RDMA/cxgb3: Fix uninitialized variable
  ...
2013-05-08 15:29:48 -07:00
Roland Dreier ea9627c800 Merge branches 'cxgb4', 'ipoib', 'iser', 'misc', 'mlx4', 'qib' and 'srp' into for-next 2013-05-08 14:12:37 -07:00
Kent Overstreet a27bb332c0 aio: don't include aio.h in sched.h
Faster kernel compiles by way of fewer unnecessary includes.

[akpm@linux-foundation.org: fix fallout]
[akpm@linux-foundation.org: fix build]
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Zach Brown <zab@redhat.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Asai Thambi S P <asamymuthupa@micron.com>
Cc: Selvan Mani <smani@micron.com>
Cc: Sam Bradshaw <sbradshaw@micron.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-07 20:16:25 -07:00
Andrew Morton 50bea5c0d5 drivers/infiniband/hw: rename random32() to prandom_u32()
Use preferable function name which implies using a pseudo-random number
generator.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-07 18:38:27 -07:00
Or Gerlitz 8d8399deb0 IB/iser: Add support for iser CM REQ additional info
Annex A12 of the IBTA spec defines additional information that needs
to be provided through the CM exchange relating to usage of ZBVA (Zero
Based VAs) and Send With Invalidate over an iSER connection.

Currently, the initiator sets both to not supported, but does provide
the header so that existing iSER targets can be patched to start
looking on the private data carried by the CM.

This is a preparation step to enable iSER with HW drivers for which
FMRs are not supported, such as mlx4 VF instances or new HW devices
which might support only FRWR (Fast Registration Work-Requests) along
the details of the IB_DEVICE_MEM_MGT_EXTENSIONS device capability.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-05-01 17:34:14 -07:00
Or Gerlitz 450d1e40d5 IB/iser: Return error to upper layers on EAGAIN registration failures
Commit 819a087316 ("IB/iser: Avoid error prints on EAGAIN
registration failures") not only eliminated the error print on that
case, but rather also modified the code such that it doesn't return
any error to upper layers.  As a result a wrong mapping was used.  Fix
this to correctly return the error in that case.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-05-01 17:34:13 -07:00
Roi Dayan 4f36388261 IB/iser: Move informational messages from error to info level
Introduce iser_info() and move informational messages that were
printed as errors to use that macro. Also, cleanup printk leftovers to
use the existing macros.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>

[ Use pr_warn(... instead of printk(KERN_WARNING ....  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-05-01 17:34:13 -07:00
Roi Dayan c1d786e682 IB/iser: Add module version
Add displaying module version, update the version to 1.1,
and remove the DRV_DATE define.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-05-01 17:34:13 -07:00
Linus Torvalds 73287a43cc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights (1721 non-merge commits, this has to be a record of some
  sort):

   1) Add 'random' mode to team driver, from Jiri Pirko and Eric
      Dumazet.

   2) Make it so that any driver that supports configuration of multiple
      MAC addresses can provide the forwarding database add and del
      calls by providing a default implementation and hooking that up if
      the driver doesn't have an explicit set of handlers.  From Vlad
      Yasevich.

   3) Support GSO segmentation over tunnels and other encapsulating
      devices such as VXLAN, from Pravin B Shelar.

   4) Support L2 GRE tunnels in the flow dissector, from Michael Dalton.

   5) Implement Tail Loss Probe (TLP) detection in TCP, from Nandita
      Dukkipati.

   6) In the PHY layer, allow supporting wake-on-lan in situations where
      the PHY registers have to be written for it to be configured.

      Use it to support wake-on-lan in mv643xx_eth.

      From Michael Stapelberg.

   7) Significantly improve firewire IPV6 support, from YOSHIFUJI
      Hideaki.

   8) Allow multiple packets to be sent in a single transmission using
      network coding in batman-adv, from Martin Hundebøll.

   9) Add support for T5 cxgb4 chips, from Santosh Rastapur.

  10) Generalize the VXLAN forwarding tables so that there is more
      flexibility in configurating various aspects of the endpoints.
      From David Stevens.

  11) Support RSS and TSO in hardware over GRE tunnels in bxn2x driver,
      from Dmitry Kravkov.

  12) Zero copy support in nfnelink_queue, from Eric Dumazet and Pablo
      Neira Ayuso.

  13) Start adding networking selftests.

  14) In situations of overload on the same AF_PACKET fanout socket, or
      per-cpu packet receive queue, minimize drop by distributing the
      load to other cpus/fanouts.  From Willem de Bruijn and Eric
      Dumazet.

  15) Add support for new payload offset BPF instruction, from Daniel
      Borkmann.

  16) Convert several drivers over to mdoule_platform_driver(), from
      Sachin Kamat.

  17) Provide a minimal BPF JIT image disassembler userspace tool, from
      Daniel Borkmann.

  18) Rewrite F-RTO implementation in TCP to match the final
      specification of it in RFC4138 and RFC5682.  From Yuchung Cheng.

  19) Provide netlink socket diag of netlink sockets ("Yo dawg, I hear
      you like netlink, so I implemented netlink dumping of netlink
      sockets.") From Andrey Vagin.

  20) Remove ugly passing of rtnetlink attributes into rtnl_doit
      functions, from Thomas Graf.

  21) Allow userspace to be able to see if a configuration change occurs
      in the middle of an address or device list dump, from Nicolas
      Dichtel.

  22) Support RFC3168 ECN protection for ipv6 fragments, from Hannes
      Frederic Sowa.

  23) Increase accuracy of packet length used by packet scheduler, from
      Jason Wang.

  24) Beginning set of changes to make ipv4/ipv6 fragment handling more
      scalable and less susceptible to overload and locking contention,
      from Jesper Dangaard Brouer.

  25) Get rid of using non-type-safe NLMSG_* macros and use nlmsg_*()
      instead.  From Hong Zhiguo.

  26) Optimize route usage in IPVS by avoiding reference counting where
      possible, from Julian Anastasov.

  27) Convert IPVS schedulers to RCU, also from Julian Anastasov.

  28) Support cpu fanouts in xt_NFQUEUE netfilter target, from Holger
      Eitzenberger.

  29) Network namespace support for nf_log, ebt_log, xt_LOG, ipt_ULOG,
      nfnetlink_log, and nfnetlink_queue.  From Gao feng.

  30) Implement RFC3168 ECN protection, from Hannes Frederic Sowa.

  31) Support several new r8169 chips, from Hayes Wang.

  32) Support tokenized interface identifiers in ipv6, from Daniel
      Borkmann.

  33) Use usbnet_link_change() helper in USB net driver, from Ming Lei.

  34) Add 802.1ad vlan offload support, from Patrick McHardy.

  35) Support mmap() based netlink communication, also from Patrick
      McHardy.

  36) Support HW timestamping in mlx4 driver, from Amir Vadai.

  37) Rationalize AF_PACKET packet timestamping when transmitting, from
      Willem de Bruijn and Daniel Borkmann.

  38) Bring parity to what's provided by /proc/net/packet socket dumping
      and the info provided by netlink socket dumping of AF_PACKET
      sockets.  From Nicolas Dichtel.

  39) Fix peeking beyond zero sized SKBs in AF_UNIX, from Benjamin
      Poirier"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
  filter: fix va_list build error
  af_unix: fix a fatal race with bit fields
  bnx2x: Prevent memory leak when cnic is absent
  bnx2x: correct reading of speed capabilities
  net: sctp: attribute printl with __printf for gcc fmt checks
  netlink: kconfig: move mmap i/o into netlink kconfig
  netpoll: convert mutex into a semaphore
  netlink: Fix skb ref counting.
  net_sched: act_ipt forward compat with xtables
  mlx4_en: fix a build error on 32bit arches
  Revert "bnx2x: allow nvram test to run when device is down"
  bridge: avoid OOPS if root port not found
  drivers: net: cpsw: fix kernel warn on cpsw irq enable
  sh_eth: use random MAC address if no valid one supplied
  3c509.c: call SET_NETDEV_DEV for all device types (ISA/ISAPnP/EISA)
  tg3: fix to append hardware time stamping flags
  unix/stream: fix peeking with an offset larger than data in queue
  unix/dgram: fix peeking with an offset larger than data in queue
  unix/dgram: peek beyond 0-sized skbs
  openvswitch: Remove unneeded ovs_netdev_get_ifindex()
  ...
2013-05-01 14:08:52 -07:00
Linus Torvalds 6da6dc2380 Merge branch 'for-next-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target update from Nicholas Bellinger:
 "The highlights this round include:

   - Add fileio support for WRITE_SAME w/ UNMAP=1 discard (asias)
   - Add fileio support for UNMAP discard (asias)
   - Add tcm_vhost hotplug support to work with upstream QEMU
     vhost-scsi-pci code (asias + mst)
   - Check for aborted sequence in tcm_fc response path (mdr)
   - Add initial iscsit_transport support into iscsi-target code (nab)
   - Refactor iscsi-target RX PDU logic + export request PDU handling
     (nab)
   - Refactor iscsi-target TX queue logic + export response PDU creation
     (nab)
   - Add new iSCSI Extentions for RDMA (ISER) target driver (Or + nab)

  The biggest changes revolve around iscsi-target refactoring in order
  to support the iser-target driver.  This includes the conversion of
  the iscsi-target data-path to use modern se_cmd->cmd_kref counting,
  and allowing transport independent aspects of RX/TX PDU
  request/response handling be shared across existing traditional
  iscsi-target code, and the new iser-target code.

  Thanks to Or Gerlitz + Mellanox for supporting the iser-target
  development effort!"

* 'for-next-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (25 commits)
  iser-target: Add iSCSI Extensions for RDMA (iSER) target driver
  tcm_vhost: Enable VIRTIO_SCSI_F_HOTPLUG
  tcm_vhost: Add ioctl to get and set events missed flag
  tcm_vhost: Add hotplug/hotunplug support
  tcm_vhost: Refactor the lock nesting rule
  tcm_fc: Check for aborted sequence
  iscsi-target: Add iser network portal attribute
  iscsi-target: Refactor TX queue logic + export response PDU creation
  iscsi-target: Refactor RX PDU logic + export request PDU handling
  iscsi-target: Add per transport iscsi_cmd alloc/free
  iscsi-target: Add iser-target parameter keys + setup during login
  iscsi-target: Initial traditional TCP conversion to iscsit_transport
  iscsi-target: Add iscsit_transport API template
  target: Add export of target_get_sess_cmd symbol
  target: Change default sense key of NOT_READY
  target/file: Set is_nonrot attribute
  target: Add sbc_execute_unmap() helper
  target/iblock: Add iblock_do_unmap() helper
  target/file: Add fd_do_unmap() helper
  target/file: Add UNMAP emulation support
  ...
2013-04-30 13:14:57 -07:00
Jeff Layton f2d9db877f drivers/infiniband/hw/mlx4: convert to using idr_alloc_cyclic()
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 18:28:41 -07:00
Jeff Layton c027e44677 drivers/infiniband/hw/amso1100: convert to using idr_alloc_cyclic
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Tejun Heo <tj@kernel.org>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-29 18:28:41 -07:00
Nicholas Bellinger b8d26b3be8 iser-target: Add iSCSI Extensions for RDMA (iSER) target driver
This patch adds support for iSCSI Extensions for RDMA target mode,
and includes CQ pooling per isert_device context distributed across
multiple active iser target sessions.

It also uses cmwq process context for RX / TX ib_post_cq() polling
via isert_cq_desc->cq_[rx,tx]_work invoked by isert_cq_[rx,tx]_callback()
hardIRQ context callbacks.

v5 changes:

- Use ISER_RECV_DATA_SEG_LEN instead of hardcoded value in ISER_RX_PAD_SIZE (Or)
- Fix make W=1 warnings (Or)
- Add missing depends on NET && INFINIBAND_ADDR_TRANS in Kconfig (Randy + Or)
- Make isert_device_find_by_ib_dev() return proper ERR_PTR (Wei Yongjun)
- Properly setup iscsi_np->np_sockaddr in isert_setup_np() (Shlomi + nab)
- Add special case for early ISCSI_OP_SCSI_CMD exception handling (nab)

v4 changes:
- Mark isert_cq_rx_work as static (Or)
- Drop unnecessary ib_dma_sync_single_for_cpu + ib_dma_sync_single_for_device
  calls for isert_cmd->sense_buf_dma from isert_put_response (Or)
- Use 12288 for ISER_RX_PAD_SIZE base to save extra page per
  struct iser_rx_desc (Or + nab)
- Drop now unnecessary isert_rx_desc usage, and convert RX users to
  iser_rx_desc (Or + nab)
- Move isert_[alloc,free]_rx_descriptors() ahead of
  isert_create_device_ib_res() usage (nab)
- Mark isert_cq_[rx,tx]_callback() + prototypes as static
- Fix 'warning: 'ret' may be used uninitialized' warning for
  isert_create_device_ib_res on powerpc allmodconfig (fengguang + nab)
- Fix 'warning: 'ret' may be used uninitialized' warning for
  isert_connect_request on i386 allyesconfig (fengguang + nab)
- Fix pr_debug conversion specification in isert_rx_completion()
  (fengguang + nab)
- Drop unnecessary isert_conn->conn_cm_id != NULL check in
  isert_connect_release causing the build warning:
  "variable dereferenced before check 'isert_conn->conn_cm_id'"
- Fix isert_lid + isert_np leak in isert_setup_np failure path
- Add isert_conn->conn_wait_comp_err usage in isert_free_conn()
  for isert_cq_comp_err completion path
- Add isert_conn->logout_posted bit to determine decrement of
  isert_conn->post_send_buf_count from logout response completion
- Always set ISER_CONN_DOWN from isert_disconnect_work() callback

v3 changes:

- Convert to use per isert_cq_desc->cq_[rx,tx]_work + drop tasklets (Or + nab)
- Move IB_EVENT_QP_LAST_WQE_REACHED warn into correct
  isert_qp_event_callback (Or)
- Drop unnecessary IB_ACCESS_REMOTE_* access flag usage in
  isert_create_device_ib_res (Or)
- Add common isert_init_send_wr(), and convert isert_put_* calls (Or)
- Move to verbs+core logic to single ib_isert.[c,h]  (Or + nab)
- Add kmem_cache isert_cmd_cache usage for descriptor allocation (nab)
- Move common ib_post_send() logic used by isert_put_*() to
  isert_post_response() (nab)
- Add isert_put_reject call in isert_response_queue() for posting
  ISCSI_REJECT response. (nab)
- Add ISTATE_SEND_REJECT checking in isert_do_control_comp. (nab)

v2 changes:

- Drop unused ISERT_ADDR_ROUTE_TIMEOUT define
- Add rdma_notify() call for IB_EVENT_COMM_EST in isert_qp_event_callback()
- Make isert_query_device() less verbose
- Drop unused RDMA_CM_EVENT_ADDR_ERROR and RDMA_CM_EVENT_ROUTE_ERROR
  cases from isert_cma_handler()
- Drop unused rdma/ib_fmr_pool.h include
- Update isert_conn_setup_qp() to assign cq based upon least used
- Add isert_create_device_ib_res() to setup PD, CQs and MRs for each
  underlying struct ib_device, instead of using per isert_conn resources.
- Add isert_free_device_ib_res() to release PD, CQs and MRs for each
  underlying struct ib_device.
- Add isert_device_find_by_ib_dev()
- Change isert_connect_request() to drop PD, CQs and MRs allocation,
  and use isert_device_find_by_ib_dev() instead.
- Add isert_device_try_release()
- Change isert_connect_release() to decrement cq_active_qps, and drop
  PD, CQs and MRs resource release.
- Update isert_connect_release() to call isert_device_try_release()
- Make isert_create_device_ib_res() determine device->cqs_used based
  upon num_online_cpus()
- Drop misleading isert_dump_ib_wc() usage
- Drop unused rdma/ib_fmr_pool.h include
- Use proper xfer_len for login PDUs in isert_rx_completion()
- Add isert_release_cmd() usage
- Change isert_alloc_cmd() to setup iscsi_cmd.release_cmd() pointer
- Change isert_put_cmd() to perform per iscsi_opcode specific release
  logic
- Add isert_unmap_cmd() call for ISCSI_OP_SCSI_CMD from isert_put_cmd()
- Change isert_send_completion() to call
  atomic_dec(&isert_conn->post_send_buf_count)
  based upon per iscsi_opcode logic
- Drop ISTATE_REMOVE processing from isert_immediate_queue()
- Drop ISTATE_SEND_DATAIN processing from isert_response_queue()
- Drop ISTATE_SEND_STATUS processing from isert_response_queue()
- Drop iscsit_transport->iscsit_unmap_cmd() and ->iscsit_free_cmd()
- Convert iser_cq_tx_tasklet() to use struct isert_cq_desc pooling logic
- Convert isert_cq_tx_callback() to use struct isert_cq_desc pooling
  logic
- Convert iser_cq_rx_tasklet() to use struct isert_cq_desc pooling logic
- Convert isert_cq_rx_callback() to use struct isert_cq_desc pooling
  logic
- Add explict iscsit_stop_dataout_timer() call to
  isert_do_rdma_read_comp()
- Use isert_get_dataout() for iscsit_transport->iscsit_get_dataout()
  caller
- Drop ISTATE_SEND_R2T processing from isert_immediate_queue()
- Drop unused rdma/ib_fmr_pool.h include
- Drop isert_cmd->cmd_kref in favor of se_cmd->cmd_kref usage
- Add struct isert_device in order to support multiple EQs + CQ pooling
- Add struct isert_cq_desc
- Drop tasklets and cqs from isert_conn
- Bump ISERT_MAX_CQ to 64
- Various minor checkpatch fixes

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-04-25 01:09:41 -07:00
Eli Cohen 3528f69637 IB/mlx4: Set link type for RAW PACKET QPs in the QP context
When the link type is Ethernet, setting the link type in the QP
context will enable TCP/IP stateless offloads (checksum, LSO, RSS) for
RAW PACKET Ethernet QPs.  For IB UD QPs this worked OK since the value
assumed by the firmware for IB link layer is zero.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-24 17:51:28 -07:00
Dotan Barak 02d7ef6f9d IB/mlx4: Disable VLAN stripping for RAW PACKET QPs
Fix the asymmetric behavior w.r.t VLAN insertion/stripping for RAW
PACKET QPs -- we don't insert on send and need not strip on receive.

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-24 17:51:28 -07:00
Steve Wise e413a823f6 RDMA/iwcm: Don't touch cmid after dropping reference
The function cm_work_handler() cannot touch the cm_id after it derefs
it, because it might be freed on another concurrent thread.  If there
are more work items queued for this cm_id, then we know there must be
more references because they are added when the work items are queued.
So in the while loop inside cm_work_handler(), after derefing, if the
queue is empty, then exit the function.  Otherwise we know it's safe
to re-acquire the lock.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-24 17:47:33 -07:00
Amir Vadai ec693d4701 net/mlx4_en: Add HW timestamping (TS) support
The patch allows to enable/disable HW timestamping for incoming and/or
outgoing packets. It adds and initializes all structs and callbacks
needed by kernel TS API.
To enable/disable HW timestamping appropriate ioctl should be used.
Currently HWTSTAMP_FILTER_ALL/NONE and HWTSAMP_TX_ON/OFF only are
supported.
When enabling TS on receive flow - VLAN stripping will be disabled.
Also were made all relevant changes in RX/TX flows to consider TS request
and plant HW timestamps into relevant structures.
mlx4_ib was fixed to compile with new mlx4_cq_alloc() signature.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-24 16:30:14 -04:00
Patrick McHardy 86a9bad3ab net: vlan: add protocol argument to packet tagging functions
Add a protocol argument to the VLAN packet tagging functions. In case of HW
tagging, we need that protocol available in the ndo_start_xmit functions,
so it is stored in a new field in the skb. The new field fits into a hole
(on 64 bit) and doesn't increase the sks's size.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-19 14:46:06 -04:00
Patrick McHardy f646968f8f net: vlan: rename NETIF_F_HW_VLAN_* feature flags to NETIF_F_HW_VLAN_CTAG_*
Rename the hardware VLAN acceleration features to include "CTAG" to indicate
that they only support CTAGs. Follow up patches will introduce 802.1ad
server provider tagging (STAGs) and require the distinction for hardware not
supporting acclerating both.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-19 14:45:26 -04:00
Patrick McHardy dc850b0e68 IPoIB: add support for TIPC protocol
Support TIPC in the IPoIB driver. Since IPoIB now keeps track of its own
neighbour entries and doesn't require the packet to have a dst_entry
anymore, the only necessary changes are to:

- not drop multicast TIPC packets because of the unknown ethernet type
- handle unicast TIPC packets similar to IPv4/IPv6 unicast packets

in ipoib_start_xmit().

An alternative would be to remove all ethertype limitations since they're
not necessary anymore, all TIPC needs to know about is ARP and RARP since
it wants to always perform "path find", even if a path is already known.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-17 14:18:33 -04:00
Mike Marciniszyn c9bdad3c81 IB/qib: Correct qib_verbs_register_sysfs() error handling
qib_verbs_register_sysfs() never cleans up from a failure.
Additionally, the caller of qib_verbs_register_sysfs() doesn't
return the correct "ret" value.

This patch resolves both of those issues.

Reported-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Dean Luick <dean.luick@intel.com>

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 23:04:36 -07:00
Mike Marciniszyn 137200a4bb IB/ipath: Correct ipath_verbs_register_sysfs() error handling
ipath_verbs_register_sysfs() never returned the correct error
code from device_create_file and never cleaned up from a failure.
Additionally, the caller of ipath_verbs_register_sysfs() doesn't
return the correct "ret" value.

This patch resolves all of these issues.

Reported-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 23:04:36 -07:00
Thadeu Lima de Souza Cascardo 5b0c275926 RDMA/cxgb4: Fix SQ allocation when on-chip SQ is disabled
Commit c079c28714 ("RDMA/cxgb4: Fix error handling in create_qp()")
broke SQ allocation.  Instead of falling back to host allocation when
on-chip allocation fails, it tries to allocate both.  And when it
does, and we try to free the address from the genpool using the host
address, we hit a BUG and the system crashes as below.

We create a new function that has the previous behavior and properly
propagate the error, as intended.

    kernel BUG at /usr/src/packages/BUILD/kernel-ppc64-3.0.68/linux-3.0/lib/genalloc.c:340!
    Oops: Exception in kernel mode, sig: 5 [#1]
    SMP NR_CPUS=1024 NUMA pSeries
    Modules linked in: rdma_ucm rdma_cm ib_addr ib_cm iw_cm ib_sa ib_mad ib_uverbs iw_cxgb4 ib_core ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables ip6table_filter ip6_tables x_tables fuse loop dm_mod ipv6 ipv6_lib sr_mod cdrom ibmveth(X) cxgb4 sg ext3 jbd mbcache sd_mod crc_t10dif scsi_dh_emc scsi_dh_hp_sw scsi_dh_alua scsi_dh_rdac scsi_dh ibmvscsic(X) scsi_transport_srp scsi_tgt scsi_mod
    Supported: Yes
    NIP: c00000000037d41c LR: d000000003913824 CTR: c00000000037d3b0
    REGS: c0000001f350ae50 TRAP: 0700   Tainted: G            X  (3.0.68-0.9-ppc64)
    MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 24042482  XER: 00000001
    TASK = c0000001f6f2a840[3616] 'rping' THREAD: c0000001f3508000 CPU: 0
    GPR00: c0000001f6e875c8 c0000001f350b0d0 c000000000fc9690 c0000001f6e875c0
    GPR04: 00000000000c0000 0000000000010000 0000000000000000 c0000000009d482a
    GPR08: 000000006a170000 0000000000100000 c0000001f350b140 c0000001f6e875c8
    GPR12: d000000003915dd0 c000000003f40000 000000003e3ecfa8 c0000001f350bea0
    GPR16: c0000001f350bcd0 00000000003c0000 0000000000040100 c0000001f6e74a80
    GPR20: d00000000399a898 c0000001f6e74ac8 c0000001fad91600 c0000001f6e74ab0
    GPR24: c0000001f7d23f80 0000000000000000 0000000000000002 000000006a170000
    GPR28: 000000000000000c c0000001f584c8d0 d000000003925180 c0000001f6e875c8
    NIP [c00000000037d41c] .gen_pool_free+0x6c/0xf8
    LR [d000000003913824] .c4iw_ocqp_pool_free+0x8c/0xd8 [iw_cxgb4]
    Call Trace:
    [c0000001f350b0d0] [c0000001f350b180] 0xc0000001f350b180 (unreliable)
    [c0000001f350b170] [d000000003913824] .c4iw_ocqp_pool_free+0x8c/0xd8 [iw_cxgb4]
    [c0000001f350b210] [d00000000390fd70] .dealloc_sq+0x90/0xb0 [iw_cxgb4]
    [c0000001f350b280] [d00000000390fe08] .destroy_qp+0x78/0xf8 [iw_cxgb4]
    [c0000001f350b310] [d000000003912738] .c4iw_destroy_qp+0x208/0x2d0 [iw_cxgb4]
    [c0000001f350b460] [d000000003861874] .ib_destroy_qp+0x5c/0x130 [ib_core]
    [c0000001f350b510] [d0000000039911bc] .ib_uverbs_cleanup_ucontext+0x174/0x4f8 [ib_uverbs]
    [c0000001f350b5f0] [d000000003991568] .ib_uverbs_close+0x28/0x70 [ib_uverbs]
    [c0000001f350b670] [c0000000001e7b2c] .__fput+0xdc/0x278
    [c0000001f350b720] [c0000000001a9590] .remove_vma+0x68/0xd8
    [c0000001f350b7b0] [c0000000001a9720] .exit_mmap+0x120/0x160
    [c0000001f350b8d0] [c0000000000af330] .mmput+0x80/0x160
    [c0000001f350b960] [c0000000000b5d0c] .exit_mm+0x1ac/0x1e8
    [c0000001f350ba10] [c0000000000b8154] .do_exit+0x1b4/0x4b8
    [c0000001f350bad0] [c0000000000b84b0] .do_group_exit+0x58/0xf8
    [c0000001f350bb60] [c0000000000ce9f4] .get_signal_to_deliver+0x2f4/0x5d0
    [c0000001f350bc60] [c000000000017ee4] .do_signal_pending+0x6c/0x3e0
    [c0000001f350bdb0] [c0000000000182cc] .do_signal+0x74/0x78
    [c0000001f350be30] [c000000000009e74] do_work+0x24/0x28

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Cc: Emil Goode <emilgoode@gmail.com>
Cc: <stable@vger.kernel.org>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 23:01:43 -07:00
Grant Grundler 532ec6f1c0 SRPT: Fix odd use of WARN_ON()
While WARN_ON("const string") will work, it's intent is not obvious.
The warning is more useful by showing the "state" value.

Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:58:08 -07:00
Doug Ledford 83bdd3b96c IPoIB: Fix ipoib_hard_header() return value
If you have a patched up dhcp server (and dhclient), they will use
AF_PACKET/SOCK_DGRAM pair to send dhcp packets over IPoIB.

However, when testing an upstream kernel, this has been broken for a
very long time (I tested 2.6.34, 2.6.38, 3.0, 3.1, 3.8, HEAD).

It turns out that the hard_header routine in ipoib is not following
the API and is returning 0 even when it pushed data onto the skb.
This then causes af_packet.c to overwrite the header just pushed with
data from user space.

Fixing this gets DHCP working on IPoIB.

Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:57:09 -07:00
Akinobu Mita cc529c0d72 RDMA: Rename random32() to prandom_u32()
Use more preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: Steve Wise <swise@chelsio.com>
Cc: linux-rdma@vger.kernel.org
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:47:05 -07:00
Cong Ding bc4ba94ce7 RDMA/cxgb3: Fix uninitialized variable
The variable npages might be used uninitialized.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:45:33 -07:00
Shlomo Pongratz f3cca4b1f4 IB/mlx4: Fetch XRC SRQ in the CQ polling code
An XRC target QP may redirect to more than one XRC SRQ.  This means
that for work completions associated with a XRC TGT QP, the srq field
in the QP has no usage and the real XRC SRQ need to be retrived using
the information from the XRCETH placed into the CQE, do that.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:42:55 -07:00
Shlomo Pongratz eec9e29fc5 IB/core: Verify that QP handler is valid before dispatching events
For QPs of type IB_QPT_XRC_TGT the IB core assigns a common event
handler __ib_shared_qp_event_handler(), and the optionally supplied
event handler is stored. When the common handler is called it iterates
on all opened QPs and calles the original handlers without checking if
they are NULL.  Fix that.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-04-16 22:42:54 -07:00
David S. Miller d978a6361a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/nfc/microread/mei.c
	net/netfilter/nfnetlink_queue_core.c

Pull in 'net' to get Eric Biederman's AF_UNIX fix, upon which
some cleanups are going to go on-top.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-07 18:37:01 -04:00
Mike Marciniszyn ff802e31b5 firmware,IB/qib: revert firmware file move
Commit e2eed58b4f ("IB/qib: change QLogic to Intel") moved a firmware
file potentially breaking the ABI.

This patch reverts that aspect of the fix as well as reverting the
firmware name as used in qib.

Reported-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-05 12:19:39 -07:00
David S. Miller e2a553dbf1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	include/net/ipip.h

The changes made to ipip.h in 'net' were already included
in 'net-next' before that header was moved to another location.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-27 13:52:49 -04:00
Linus Torvalds 53b6809248 Small batch of InfiniBand/RDMA fixes for 3.9:
- Fix for TX lockup in IPoIB
  - QLogic -> Intel update for qib driver
  - Small static checker fix for qib
  - Fix error path return value in cxgb4
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband/rdma fixes from Roland Dreier:
 "Small batch of InfiniBand/RDMA fixes for 3.9:

   - Fix for TX lockup in IPoIB
   - QLogic -> Intel update for qib driver
   - Small static checker fix for qib
   - Fix error path return value in cxgb4"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/qib: change QLogic to Intel
  IB/ipath: Silence a static checker warning
  IPoIB: Fix send lockup due to missed TX completion
  RDMA/cxgb4: Fix error return code in create_qp()
2013-03-25 09:44:40 -07:00
Roland Dreier 4e73a54f95 Merge branches 'cxgb4', 'ipoib' and 'qib' into for-next 2013-03-22 18:08:03 -07:00
Vinit Agnihotri e2eed58b4f IB/qib: change QLogic to Intel
These changes modify the qib driver as part of acquiring
the InfiniBand assets of QLogic.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-03-22 18:07:04 -07:00
Dan Carpenter 3c32869f7a IB/ipath: Silence a static checker warning
I have a static checker which complains that 0x255 is too high for
the "dev->opstats[opcode]" array.  It turns out that the hardware
has already validated the opcode at this point so it can't actually
overflow.

However, silencing the warning is good and this matches how the
opcode is treated in qib_ib_rcv() as well.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-03-22 18:07:04 -07:00
Mike Marciniszyn 1ee9e2aa7b IPoIB: Fix send lockup due to missed TX completion
Commit f0dc117abd ("IPoIB: Fix TX queue lockup with mixed UD/CM
traffic") attempts to solve an issue where unprocessed UD send
completions can deadlock the netdev.

The patch doesn't fully resolve the issue because if more than half
the tx_outstanding's were UD and all of the destinations are RC
reachable, arming the CQ doesn't solve the issue.

This patch uses the IB_CQ_REPORT_MISSED_EVENTS on the
ib_req_notify_cq().  If the rc is above 0, the UD send cq completion
callback is called directly to re-arm the send completion timer.

This issue is seen in very large parallel filesystem deployments
and the patch has been shown to correct the issue.

Cc: <stable@vger.kernel.org>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-03-22 18:01:04 -07:00
Wei Yongjun 55e57a780a RDMA/cxgb4: Fix error return code in create_qp()
Fix to return a negative error code from the error handling case
instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-03-22 18:00:41 -07:00
David S. Miller 61816596d1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull in the 'net' tree to get Daniel Borkmann's flow dissector
infrastructure change.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-20 12:46:26 -04:00
Linus Torvalds 7b1b3fd74e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix ARM BPF JIT handling of negative 'k' values, from Chen Gang.

 2) Insufficient space reserved for bridge netlink values, fix from
    Stephen Hemminger.

 3) Some dst_neigh_lookup*() callers don't interpret error pointer
    correctly, fix from Zhouyi Zhou.

 4) Fix transport match in SCTP active_path loops, from Xugeng Zhang.

 5) Fix qeth driver handling of multi-order SKB frags, from Frank
    Blaschka.

 6) fec driver is missing napi_disable() call, resulting in crashes on
    unload, from Georg Hofmann.

 7) Don't try to handle PMTU events on a listening socket, fix from Eric
    Dumazet.

 8) Fix timestamp location calculations in IP option processing, from
    David Ward.

 9) FIB_TABLE_HASHSZ setting is not controlled by the correct kconfig
    tests, from Denis V Lunev.

10) Fix TX descriptor push handling in SFC driver, from Ben Hutchings.

11) Fix isdn/hisax and tulip/de4x5 kconfig dependencies, from Arnd
    Bergmann.

12) bnx2x statistics don't handle 4GB rollover correctly, fix from
    Maciej Żenczykowski.

13) Openvswitch bug fixes for vport del/new error reporting, missing
    genlmsg_end() call in netlink processing, and mis-parsing of
    LLC/SNAP ethernet types.  From Rich Lane.

14) SKB pfmemalloc state should only be propagated from the head page of
    a compound page, fix from Pavel Emelyanov.

15) Fix link handling in tg3 driver for 5715 chips when autonegotation
    is disabled.  From Nithin Sujir.

16) Fix inverted test of cpdma_check_free_tx_desc return value in
    davinci_emac driver, from Mugunthan V N.

17) vlan_depth is incorrectly calculated in skb_network_protocol(), from
    Li RongQing.

18) Fix probing of Gobi 1K devices in qmi_wwan driver, and fix NCM
    device mode backwards compat in cdc_ncm driver.  From Bjørn Mork.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
  inet: limit length of fragment queue hash table bucket lists
  qeth: Fix scatter-gather regression
  qeth: Fix invalid router settings handling
  qeth: delay feature trace
  tcp: dont handle MTU reduction on LISTEN socket
  bnx2x: fix occasional statistics off-by-4GB error
  vhost/net: fix heads usage of ubuf_info
  bridge: Add support for setting BR_ROOT_BLOCK flag.
  bnx2x: add missing napi deletion in error path
  drivers: net: ethernet: ti: davinci_emac: fix usage of cpdma_check_free_tx_desc()
  ethernet/tulip: DE4x5 needs VIRT_TO_BUS
  isdn: hisax: netjet requires VIRT_TO_BUS
  net: cdc_ncm, cdc_mbim: allow user to prefer NCM for backwards compatibility
  rtnetlink: Mask the rta_type when range checking
  Revert "ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally"
  Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug
  smsc75xx: configuration help incorrectly mentions smsc95xx
  net: fec: fix missing napi_disable call
  net: fec: restart the FEC when PHY speed changes
  skb: Propagate pfmemalloc on skb from head page only
  ...
2013-03-19 13:20:51 -07:00
Christoph Paasch 1a2c6181c4 tcp: Remove TCPCT
TCPCT uses option-number 253, reserved for experimental use and should
not be used in production environments.
Further, TCPCT does not fully implement RFC 6013.

As a nice side-effect, removing TCPCT increases TCP's performance for
very short flows:

Doing an apache-benchmark with -c 100 -n 100000, sending HTTP-requests
for files of 1KB size.

before this patch:
	average (among 7 runs) of 20845.5 Requests/Second
after:
	average (among 7 runs) of 21403.6 Requests/Second

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-17 14:35:13 -04:00
Zhouyi Zhou aaa0c23cb9 Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug
When neighbour table is full, dst_neigh_lookup/dst_neigh_lookup_skb will return
-ENOBUFS which is absolutely non zero, while all the code in kernel which use
above functions assume failure only on zero return which will cause panic. (for
example: : https://bugzilla.kernel.org/show_bug.cgi?id=54731).

This patch corrects above error with smallest changes to kernel source code and
also correct two return value check missing bugs in drivers/infiniband/hw/cxgb4/cm.c

Tested on my x86_64 SMP machine

Reported-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Tested-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-15 09:06:58 -04:00
Vipul Pandya 9919d5bd01 RDMA/cxgb4: Fix onchip queue support for T5
T5 adapter does not support onchip queue memory. Present logic fails to
allocate QP for T5 and returns an error. Also, if module parameter ocqp_support
is zero then we are unable to allocate QP which should not be the case. Ideally
if ocqp_support parameter is 0 or onchip queue support is disable then host QP
should be allocated before returning an error.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:59 -04:00
Vipul Pandya 3b174d942c RDMA/cxgb4: Bump tcam_full stat and WR reply timeout
Always bump the tcam_full stat. Also, bump wr reply timeout to 30 seconds.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:59 -04:00
Vipul Pandya 0e5eca791c RDMA/cxgb4: Map pbl buffers for dma if using DSGL.
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:59 -04:00
Vipul Pandya 42b6a94990 RDMA/cxgb4: Use DSGLs for fastreg and adapter memory writes for T5.
It enables direct DMA by HW to memory region PBL arrays and fast register PBL
arrays from host memory, vs the T4 way of passing these arrays in the WR itself.
The result is lower latency for memory registration, and larger PBL array
support for fast register operations.

This patch also updates ULP_TX_MEM_WRITE command fields for T5. Ordering bit of
ULP_TX_MEM_WRITE is at bit position 22 in T5 and at 23 in T4.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:59 -04:00
Vipul Pandya 80ccdd6051 RDMA/cxgb4: Add module_params to enable DB FC & Coalescing on T5
Both DB Flow-Control and DB Coalescing are disabled by default on T5

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:58 -04:00
Vipul Pandya 3cbdb928e2 RDMA/cxgb4: Turn off db coalescing when RDMA QPs are in use.
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:58 -04:00
Vipul Pandya f079af7a11 RDMA/cxgb4: Add Support for Chelsio T5 adapter
Adds support for Chelsio T5 adapter.
Enables T5's Write Combining feature.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-14 11:35:58 -04:00
Tejun Heo 95e1b7145e mlx4: remove leftover idr_pre_get() call
Commit 6a9200603d ("IB/mlx4: convert to idr_alloc()") forgot to remove
idr_pre_get() call in mlx4_ib_cm_paravirt_init().  It's unnecessary and
idr_pre_get() will soon be deprecated.  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-13 15:21:46 -07:00
Eric W. Biederman 7f78e03513 fs: Limit sys_mount to only request filesystem modules.
Modify the request_module to prefix the file system type with "fs-"
and add aliases to all of the filesystems that can be built as modules
to match.

A common practice is to build all of the kernel code and leave code
that is not commonly needed as modules, with the result that many
users are exposed to any bug anywhere in the kernel.

Looking for filesystems with a fs- prefix limits the pool of possible
modules that can be loaded by mount to just filesystems trivially
making things safer with no real cost.

Using aliases means user space can control the policy of which
filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf
with blacklist and alias directives.  Allowing simple, safe,
well understood work-arounds to known problematic software.

This also addresses a rare but unfortunate problem where the filesystem
name is not the same as it's module name and module auto-loading
would not work.  While writing this patch I saw a handful of such
cases.  The most significant being autofs that lives in the module
autofs4.

This is relevant to user namespaces because we can reach the request
module in get_fs_type() without having any special permissions, and
people get uncomfortable when a user specified string (in this case
the filesystem type) goes all of the way to request_module.

After having looked at this issue I don't think there is any
particular reason to perform any filtering or permission checks beyond
making it clear in the module request that we want a filesystem
module.  The common pattern in the kernel is to call request_module()
without regards to the users permissions.  In general all a filesystem
module does once loaded is call register_filesystem() and go to sleep.
Which means there is not much attack surface exposed by loading a
filesytem module unless the filesystem is mounted.  In a user
namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT,
which most filesystems do not set today.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reported-by: Kees Cook <keescook@google.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-03 19:36:31 -08:00
Sasha Levin b67bfe0d42 hlist: drop the node parameter from iterators
I'm not sure why, but the hlist for each entry iterators were conceived

        list_for_each_entry(pos, head, member)

The hlist ones were greedy and wanted an extra parameter:

        hlist_for_each_entry(tpos, pos, head, member)

Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.

Besides the semantic patch, there was some manual work required:

 - Fix up the actual hlist iterators in linux/list.h
 - Fix up the declaration of other iterators based on the hlist ones.
 - A very small amount of places were using the 'node' parameter, this
 was modified to use 'obj->member' instead.
 - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
 properly, so those had to be fixed up manually.

The semantic patch which is mostly the work of Peter Senna Tschudin is here:

@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

type T;
expression a,c,d,e;
identifier b;
statement S;
@@

-T b;
    <+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
    ...+>

[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:24 -08:00
Tejun Heo e8c8d1bc06 idr: remove MAX_IDR_MASK and move left MAX_IDR_* into idr.c
MAX_IDR_MASK is another weirdness in the idr interface.  As idr covers
whole positive integer range, it's defined as 0x7fffffff or INT_MAX.

Its usage in idr_find(), idr_replace() and idr_remove() is bizarre.
They basically mask off the sign bit and operate on the rest, so if
the caller, by accident, passes in a negative number, the sign bit
will be masked off and the remaining part will be used as if that was
the input, which is worse than crashing.

The constant is visible in idr.h and there are several users in the
kernel.

* drivers/i2c/i2c-core.c:i2c_add_numbered_adapter()

  Basically used to test if adap->nr is a negative number which isn't
  -1 and returns -EINVAL if so.  idr_alloc() already has negative
  @start checking (w/ WARN_ON_ONCE), so this can go away.

* drivers/infiniband/core/cm.c:cm_alloc_id()
  drivers/infiniband/hw/mlx4/cm.c:id_map_alloc()

  Used to wrap cyclic @start.  Can be replaced with max(next, 0).
  Note that this type of cyclic allocation using idr is buggy.  These
  are prone to spurious -ENOSPC failure after the first wraparound.

* fs/super.c:get_anon_bdev()

  The ID allocated from ida is masked off before being tested whether
  it's inside valid range.  ida allocated ID can never be a negative
  number and the masking is unnecessary.

Update idr_*() functions to fail with -EINVAL when negative @id is
specified and update other MAX_IDR_MASK users as described above.

This leaves MAX_IDR_MASK without any user, remove it and relocate
other MAX_IDR_* constants to lib/idr.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: "Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Wolfram Sang <wolfram@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:20 -08:00