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2017-03-24RDMA/iser: Fix possible mr leak on device removal eventSagi Grimberg2-3/+7
When the rdma device is removed, we must cleanup all the rdma resources within the DEVICE_REMOVAL event handler to let the device teardown gracefully. When this happens with live I/O, some memory regions are occupied. Thus, track them too and dereg all the mr's. We are safe with mr access by iscsi_iser_cleanup_task. Reported-by: Raju Rangoju <rajur@chelsio.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-03-02sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>Ingo Molnar2-0/+2
Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-25Merge tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdmaLinus Torvalds5-7/+6
Pull rdma DMA mapping updates from Doug Ledford: "Drop IB DMA mapping code and use core DMA code instead. Bart Van Assche noted that the ib DMA mapping code was significantly similar enough to the core DMA mapping code that with a few changes it was possible to remove the IB DMA mapping code entirely and switch the RDMA stack to use the core DMA mapping code. This resulted in a nice set of cleanups, but touched the entire tree and has been kept separate for that reason." * tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits) IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it IB/core: Remove ib_device.dma_device nvme-rdma: Switch from dma_device to dev.parent RDS: net: Switch from dma_device to dev.parent IB/srpt: Modify a debug statement IB/srp: Switch from dma_device to dev.parent IB/iser: Switch from dma_device to dev.parent IB/IPoIB: Switch from dma_device to dev.parent IB/rxe: Switch from dma_device to dev.parent IB/vmw_pvrdma: Switch from dma_device to dev.parent IB/usnic: Switch from dma_device to dev.parent IB/qib: Switch from dma_device to dev.parent IB/qedr: Switch from dma_device to dev.parent IB/ocrdma: Switch from dma_device to dev.parent IB/nes: Remove a superfluous assignment statement IB/mthca: Switch from dma_device to dev.parent IB/mlx5: Switch from dma_device to dev.parent IB/mlx4: Switch from dma_device to dev.parent IB/i40iw: Remove a superfluous assignment statement IB/hns: Switch from dma_device to dev.parent ...
2017-02-23Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdmaLinus Torvalds12-173/+248
Pull rdma updates from Doug Ledford: "First set of updates for 4.11 kernel merge window - Add new Broadcom bnxt_re RoCE driver - rxe driver updates - ioctl cleanups - ETH_P_IBOE declaration cleanup - IPoIB changes - Add port state cache - Allow srpt driver to accept guids as port names in config - Update to hfi1 driver - Update to srp driver - Lots of misc minor changes all over" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (114 commits) RDMA/bnxt_re: fix for "bnxt_en: Update to firmware interface spec 1.7.0." rdma_cm: fail iwarp accepts w/o connection params IB/srp: Drain the send queue before destroying a QP IB/core: Add support for draining IB_POLL_DIRECT completion queues IB/srp: Improve an error path IB/srp: Make a diagnostic message more informative IB/srp: Document locking conventions IB/srp: Fix race conditions related to task management IB/srp: Avoid that duplicate responses trigger a kernel bug IB/SRP: Avoid using IB_MR_TYPE_SG_GAPS RDMA/qedr: Fix some error handling RDMA/bnxt_re: add DCB dependency IB/hns: include linux/module.h IB/vmw_pvrdma: Expose vendor error to ULPs vmw_pvrdma: switch to pci_alloc_irq_vectors IB/hfi1: use size_t for passing array length IB/ipoib: Remove redudant label IB/ipoib: remove the unnecessary memory free IB/mthca: switch to pci_alloc_irq_vectors IB/hfi1: Code reuse with memdup_copy ...
2017-02-21Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds2-0/+2
Pull SCSI updates from James Bottomley: "This update includes the usual round of major driver updates (ncr5380, ufs, lpfc, be2iscsi, hisi_sas, storvsc, cxlflash, aacraid, megaraid_sas, ...). There's also an assortment of minor fixes and the major update of switching a bunch of drivers to pci_alloc_irq_vectors from Christoph" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (188 commits) scsi: megaraid_sas: handle dma_addr_t right on 32-bit scsi: megaraid_sas: array overflow in megasas_dump_frame() scsi: snic: switch to pci_irq_alloc_vectors scsi: megaraid_sas: driver version upgrade scsi: megaraid_sas: Change RAID_1_10_RMW_CMDS to RAID_1_PEER_CMDS and set value to 2 scsi: megaraid_sas: Indentation and smatch warning fixes scsi: megaraid_sas: Cleanup VD_EXT_DEBUG and SPAN_DEBUG related debug prints scsi: megaraid_sas: Increase internal command pool scsi: megaraid_sas: Use synchronize_irq to wait for IRQs to complete scsi: megaraid_sas: Bail out the driver load if ld_list_query fails scsi: megaraid_sas: Change build_mpt_mfi_pass_thru to return void scsi: megaraid_sas: During OCR, if get_ctrl_info fails do not continue with OCR scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool scsi: megaraid_sas: Remove unused pd_index from megasas_build_ld_nonrw_fusion scsi: megaraid_sas: megasas_return_cmd does not memset IO frame to zero scsi: megaraid_sas: max_fw_cmds are decremented twice, remove duplicate scsi: megaraid_sas: update can_queue only if the new value is less scsi: megaraid_sas: Change max_cmd from u32 to u16 in all functions scsi: megaraid_sas: set pd_after_lb from MR_BuildRaidContext and initialize pDevHandle to MR_DEVHANDLE_INVALID scsi: megaraid_sas: latest controller OCR capability from FW before sending shutdown DCMD ...
2017-02-19IB/srp: Drain the send queue before destroying a QPBart Van Assche1-5/+14
A quote from the IB spec: However, if the Consumer does not wait for the Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment leakage may occur. Therefore, it is good programming practice to tear down a QP that is associated with an SRQ by using the following process: * Put the QP in the Error State; * wait for the Affiliated Asynchronous Last WQE Reached Event; * either: * drain the CQ by invoking the Poll CQ verb and either wait for CQ to be empty or the number of Poll CQ operations has exceeded CQ capacity size; or * post another WR that completes on the same CQ and wait for this WR to return as a WC; * and then invoke a Destroy QP or Reset QP. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/srp: Improve an error pathBart Van Assche1-1/+2
Avoid that the following message is printed if login fails: scsi host0: ib_srp: Sending CM DREQ failed Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/srp: Make a diagnostic message more informativeBart Van Assche1-2/+3
Report the destination port GID if connecting fails. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/srp: Document locking conventionsBart Van Assche1-0/+5
Use lockdep_assert_held() statements to verify at run-time whether the proper locks are held. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/srp: Fix race conditions related to task managementBart Van Assche2-16/+30
Avoid that srp_process_rsp() overwrites the status information in ch if the SRP target response timed out and processing of another task management function has already started. Avoid that issuing multiple task management functions concurrently triggers list corruption. This patch prevents that the following stack trace appears in the system log: WARNING: CPU: 8 PID: 9269 at lib/list_debug.c:52 __list_del_entry_valid+0xbc/0xc0 list_del corruption. prev->next should be ffffc90004bb7b00, but was ffff8804052ecc68 CPU: 8 PID: 9269 Comm: sg_reset Tainted: G W 4.10.0-rc7-dbg+ #3 Call Trace: dump_stack+0x68/0x93 __warn+0xc6/0xe0 warn_slowpath_fmt+0x4a/0x50 __list_del_entry_valid+0xbc/0xc0 wait_for_completion_timeout+0x12e/0x170 srp_send_tsk_mgmt+0x1ef/0x2d0 [ib_srp] srp_reset_device+0x5b/0x110 [ib_srp] scsi_ioctl_reset+0x1c7/0x290 scsi_ioctl+0x12a/0x420 sd_ioctl+0x9d/0x100 blkdev_ioctl+0x51e/0x9f0 block_ioctl+0x38/0x40 do_vfs_ioctl+0x8f/0x700 SyS_ioctl+0x3c/0x70 entry_SYSCALL_64_fastpath+0x18/0xad Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Cc: Steve Feeley <Steve.Feeley@sandisk.com> Cc: <stable@vger.kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/srp: Avoid that duplicate responses trigger a kernel bugBart Van Assche1-1/+3
After srp_process_rsp() returns there is a short time during which the scsi_host_find_tag() call will return a pointer to the SCSI command that is being completed. If during that time a duplicate response is received, avoid that the following call stack appears: BUG: unable to handle kernel NULL pointer dereference at (null) IP: srp_recv_done+0x450/0x6b0 [ib_srp] Oops: 0000 [#1] SMP CPU: 10 PID: 0 Comm: swapper/10 Not tainted 4.10.0-rc7-dbg+ #1 Call Trace: <IRQ> __ib_process_cq+0x4b/0xd0 [ib_core] ib_poll_handler+0x1d/0x70 [ib_core] irq_poll_softirq+0xba/0x120 __do_softirq+0xba/0x4c0 irq_exit+0xbe/0xd0 smp_apic_timer_interrupt+0x38/0x50 apic_timer_interrupt+0x90/0xa0 </IRQ> RIP: srp_recv_done+0x450/0x6b0 [ib_srp] RSP: ffff88046f483e20 Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Laurence Oberman <loberman@redhat.com> Cc: Steve Feeley <Steve.Feeley@sandisk.com> Cc: <stable@vger.kernel.org> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/SRP: Avoid using IB_MR_TYPE_SG_GAPSBart Van Assche1-9/+3
Tests have shown that the following error message is reported when using SG-GAPS registration with an mlx5 adapter: scsi host1: ib_srp: failed RECV status WR flushed (5) for CQE ffff880bd4270eb0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0f007806 2500002a ad9fafd1 scsi host1: ib_srp: reconnect succeeded mlx5_0:dump_cqe:262:(pid 7369): dump error cqe 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0f007806 25000032 00105dd0 scsi host1: ib_srp: failed FAST REG status memory management operation error (6) for CQE ffff880b92860138 Hence avoid using SG-GAPS memory registrations. Additionally, always configure the blk_queue_virt_boundary() to avoid to trigger a mapping failure when using adapters that support SG-GAPS (e.g. mlx5). Fixes: commit ad8e66b4a801 ("IB/srp: fix mr allocation when the device supports sg gaps") Fixes: commit 509c5f33f4f6 ("IB/srp: Prevent mapping failures") Reported-by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Leon Romanovsky <leonro@mellanox.com> Cc: Mark Bloch <markb@mellanox.com> Cc: Yuval Shaia <yuval.shaia@oracle.com> Cc: <stable@vger.kernel.org> # 4.7+ Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/ipoib: Remove redudant labelZhu Yanjun1-4/+3
There are 2 labels to mark the same statements. Replace the 2 labels with one versatile labe. Cc: Joe Jin <joe.jin@oracle.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/ipoib: remove the unnecessary memory freeZhu Yanjun1-1/+3
In the function ipoib_cm_nonsrq_init_rx, the memory is not allocated successfully. It is not necessary to free it. CC: Joe Jin <joe.jin@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19IB/iser: Protect completion context active_qps updateMax Gurtovoy1-0/+2
As iser connections can share completion contexts, we need to protect the active_qps update each time we set it. Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Acked-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-19Merge branch 'k.o/for-4.10-rc' into HEADDoug Ledford4-23/+18
2017-02-15IB/IPoIB: Add destination address when re-queue packetErez Shitrit1-13/+17
When sending packet to destination that was not resolved yet via path query, the driver keeps the skb and tries to re-send it again when the path is resolved. But when re-sending via dev_queue_xmit the kernel doesn't call to dev_hard_header, so IPoIB needs to keep 20 bytes in the skb and to put the destination address inside them. In that way the dev_start_xmit will have the correct destination, and the driver won't take the destination from the skb->data, while nothing exists there, which causes to packet be be dropped. The test flow is: 1. Run the SM on remote node, 2. Restart the driver. 4. Ping some destination, 3. Observe that first ICMP request will be dropped. Fixes: fc791b633515 ("IB/ipoib: move back IB LL address into the hard header") Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Noa Osherovich <noaos@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Tested-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-02-06scsi: remove eh_timed_out methods in the transport templateChristoph Hellwig2-0/+2
Instead define the timeout behavior purely based on the host_template eh_timed_out method and wire up the existing transport implementations in the host templates. This also clears up the confusion that the transport template method overrides the host template one, so some drivers have to re-override the transport template one. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-27IB/srpt: Accept GUIDs as port namesBart Van Assche2-61/+96
Port and ACL information must be configured before an initiator logs in. Make it possible to configure this information before a subnet prefix has been assigned to a port by not only accepting GIDs as target port and initiator port names but by also accepting port GUIDs. Add a 'priv' member to struct se_wwn to allow target drivers to associate their own data with struct se_wwn. Reported-by: Doug Ledford <dledford@redhat.com> References: http://www.spinics.net/lists/linux-rdma/msg39505.html Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/ipoib: Remove the unnecessary error checkZhu Yanjun4-13/+7
The function ipoib_mcast_start_thread/ipoib_ib_dev_up always return zero. As such, in the function ipoib_open, err_stop will never be reached. So remove this err_stop and change the return type of the function ipoib_mcast_start_thread/ipoib_ib_dev_up to void. Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/ipoib: function interface changeZhu Yanjun2-8/+4
The ipoib_ib_dev_down/ipoib_ib_dev_stop return zero unconditionally and the callers never check the returned values, change the return type to void and remove the redundant return values. Reviewed-by: Shan Hai <shan.hai@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/ipoib: Remove unnecessary returned value checkZhu Yanjun3-10/+4
In the function ipoib_set_dev_features, the returned value is always 0. As such, it is not necessary to check the returned value. This is not a bug. It is a trivial problem. Reviewed-by: Guanglei Li <guanglei.li@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/isert: fix spelling mistake: "teminating" -> "terminating"Colin Ian King1-1/+1
Trivial fix to spelling mistake in isert_warn message Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/srpt: Modify a debug statementBart Van Assche1-2/+1
Since a later patch will remove ib_device.dma_device and since knowing the value of that pointer is not too important, remove dma_device from the debug output. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/srp: Switch from dma_device to dev.parentBart Van Assche1-2/+2
Prepare for removal of ib_device.dma_device. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/iser: Switch from dma_device to dev.parentBart Van Assche1-1/+1
Prepare for removal of ib_device.dma_device. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/IPoIB: Switch from dma_device to dev.parentBart Van Assche2-2/+2
Prepare for removal of ib_device.dma_device. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24treewide: Move dma_ops from struct dev_archdata into struct deviceBart Van Assche1-1/+1
Some but not all architectures provide set_dma_ops(). Move dma_ops from struct dev_archdata into struct device such that it becomes possible on all architectures to configure dma_ops per device. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Russell King <linux@armlinux.org.uk> Cc: x86@kernel.org Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/iser: remove unused variable from iser_conn structMax Gurtovoy3-14/+5
max_sectors calculation was fixed in commit: 9c674815d346 ("IB/iser: Fix max_sectors calculation"). Thus, iser_conn variable scsi_max_sectors is not needed anymore. Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Tested-by: Raju Rangoju <rajur@chelsio.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/iser: Fix sg_tablesize calculationMax Gurtovoy1-7/+0
For devices that can register page list that is bigger than USHRT_MAX, we actually take the wrong value for sg_tablesize. E.g: for CX4 max_fast_reg_page_list_len is 65536 (bigger than USHRT_MAX) so we set sg_tablesize to 0 by mistake. Therefore, each IO that is bigger than 4k splitted to "< 4k" chunks that cause performance degredation. Remove wrong sg_tablesize assignment, and use the value that was set during address resolution handler with the needed casting. Cc: <stable@vger.kernel.org> # v4.5+ Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/srp: fix invalid indirect_sg_entries parameter valueIsrael Rukshin1-0/+6
After setting indirect_sg_entries module_param to huge value (e.g 500,000), srp_alloc_req_data() fails to allocate indirect descriptors for the request ring (kmalloc fails). This commit enforces the maximum value of indirect_sg_entries to be SG_MAX_SEGMENTS as signified in module param description. Fixes: 65e8617fba17 (scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTS) Fixes: c07d424d6118 (IB/srp: add support for indirect tables that don't fit in SRP_CMD) Cc: stable@vger.kernel.org # 4.7+ Signed-off-by: Israel Rukshin <israelr@mellanox.com> Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>-- Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24IB/srp: fix mr allocation when the device supports sg gapsIsrael Rukshin1-2/+7
If the device support arbitrary sg list mapping (device cap IB_DEVICE_SG_GAPS_REG set) we allocate the memory regions with IB_MR_TYPE_SG_GAPS. Fixes: 509c5f33f4f6 ("IB/srp: Prevent mapping failures") Cc: <stable@vger.kernel.org> # 4.7+ Signed-off-by: Israel Rukshin <israelr@mellanox.com> Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Mark Bloch <markb@mellanox.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Change list_del to list_del_init in the tx objectFeras Daoud1-1/+1
Since ipoib_cm_tx_start function and ipoib_cm_tx_reap function belong to different work queues, they can run in parallel. In this case if ipoib_cm_tx_reap calls list_del and release the lock, ipoib_cm_tx_start may acquire it and call list_del_init on the already deleted object. Changing list_del to list_del_init in ipoib_cm_tx_reap fixes the problem. Fixes: 839fcaba355a ("IPoIB: Connected mode experimental support") Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Alex Vesker <valex@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Replace list_del of the neigh->list with list_del_initFeras Daoud1-4/+4
In order to resolve a situation where a few process delete the same list element in sequence and cause panic, list_del is replaced with list_del_init. In this case if the first process that calls list_del releases the lock before acquiring it again, other processes who can acquire the lock will call list_del_init. Fixes: b63b70d87741 ("IPoIB: Use a private hash table for path lookup") Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Alex Vesker <valex@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Use debug prints instead of warnings in RNR WC statusFeras Daoud1-3/+6
If a receive request has not been posted to the work queue, the incoming message is rejected and the peer will receive a receiver-not-ready (RNR) error. In IPoIB, IB_WC_RNR_RETRY_EXC_ERR error is part of the life cycle therefore ipoib_cm_handle_tx_wc function will print to debug instead of warnings. Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Add detailed error message to dev_queue_xmit callFeras Daoud3-8/+13
Add a detailed return code to dev_queue_xmit function when calling to requeue packet via __skb_dequeue. Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: rtnl_unlock can not come after free_netdevFeras Daoud1-2/+2
The ipoib_vlan_add function calls rtnl_unlock after free_netdev, rtnl_unlock not only releases the lock, but also calls netdev_run_todo. The latter function browses the net_todo_list array and completes the unregistration of all its net_device instances. If we call free_netdev before rtnl_unlock, then netdev_run_todo call over the freed device causes panic. To fix, move rtnl_unlock call before free_netdev call. Fixes: 9baa0b036410 ("IB/ipoib: Add rtnl_link_ops support") Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Fix deadlock between rmmod and set_modeFeras Daoud2-9/+9
When calling set_mode from sys/fs, the call flow locks the sys/fs lock first and then tries to lock rtnl_lock (when calling ipoib_set_mod). On the other hand, the rmmod call flow takes the rtnl_lock first (when calling unregister_netdev) and then tries to take the sys/fs lock. Deadlock a->b, b->a. The problem starts when ipoib_set_mod frees it's rtnl_lck and tries to get it after that. set_mod: [<ffffffff8104f2bd>] ? check_preempt_curr+0x6d/0x90 [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180 [<ffffffff81448655>] ? __rtnl_unlock+0x15/0x20 [<ffffffff814fed2b>] mutex_lock+0x2b/0x50 [<ffffffff81448675>] rtnl_lock+0x15/0x20 [<ffffffffa02ad807>] ipoib_set_mode+0x97/0x160 [ib_ipoib] [<ffffffffa02b5f5b>] set_mode+0x3b/0x80 [ib_ipoib] [<ffffffff8134b840>] dev_attr_store+0x20/0x30 [<ffffffff811f0fe5>] sysfs_write_file+0xe5/0x170 [<ffffffff8117b068>] vfs_write+0xb8/0x1a0 [<ffffffff8117ba81>] sys_write+0x51/0x90 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b rmmod: [<ffffffff81279ffc>] ? put_dec+0x10c/0x110 [<ffffffff8127a2ee>] ? number+0x2ee/0x320 [<ffffffff814fe6a5>] schedule_timeout+0x215/0x2e0 [<ffffffff8127cc04>] ? vsnprintf+0x484/0x5f0 [<ffffffff8127b550>] ? string+0x40/0x100 [<ffffffff814fe323>] wait_for_common+0x123/0x180 [<ffffffff81060250>] ? default_wake_function+0x0/0x20 [<ffffffff8119661e>] ? ifind_fast+0x5e/0xb0 [<ffffffff814fe43d>] wait_for_completion+0x1d/0x20 [<ffffffff811f2e68>] sysfs_addrm_finish+0x228/0x270 [<ffffffff811f2fb3>] sysfs_remove_dir+0xa3/0xf0 [<ffffffff81273f66>] kobject_del+0x16/0x40 [<ffffffff8134cd14>] device_del+0x184/0x1e0 [<ffffffff8144e59b>] netdev_unregister_kobject+0xab/0xc0 [<ffffffff8143c05e>] rollback_registered+0xae/0x130 [<ffffffff8143c102>] unregister_netdevice+0x22/0x70 [<ffffffff8143c16e>] unregister_netdev+0x1e/0x30 [<ffffffffa02a91b0>] ipoib_remove_one+0xe0/0x120 [ib_ipoib] [<ffffffffa01ed95f>] ib_unregister_device+0x4f/0x100 [ib_core] [<ffffffffa021f5e1>] mlx4_ib_remove+0x41/0x180 [mlx4_ib] [<ffffffffa01ab771>] mlx4_remove_device+0x71/0x90 [mlx4_core] Fixes: 862096a8bbf8 ("IB/ipoib: Add more rtnl_link_ops callbacks") Cc: <stable@vger.kernel.org> # v3.6+ Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Fix deadlock over vlan_mutexFeras Daoud1-1/+5
This patch fixes Deadlock while executing ipoib_vlan_delete. The function takes the vlan_rwsem semaphore and calls unregister_netdevice. The later function calls ipoib_mcast_stop_thread that cause workqueue flush. When the queue has one of the ipoib_ib_dev_flush_xxx events, a deadlock occur because these events also tries to catch the same vlan_rwsem semaphore. To fix, unregister_netdevice should be called after releasing the semaphore. Fixes: cbbe1efa4972 ("IPoIB: Fix deadlock between ipoib_open() and child interface create") Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Alex Vesker <valex@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: Set device connection mode only when neededFeras Daoud1-0/+7
When changing the connection mode, the ipoib_set_mode function did not check if the previous connection mode equals to the new one. This commit adds the required check and return 0 if the new mode equals to the previous one. Fixes: 839fcaba355a ("IPoIB: Connected mode experimental support") Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Reviewed-by: Alex Vesker <valex@mellanox.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-12IB/ipoib: When given an invalid UD MTU, give debug msgFeras Daoud1-0/+4
In datagram mode, the IB UD (Unreliable Datagram) transport is used so the MTU of the interface is equal to the IB L2 MTU minus the IPoIB encapsulation header. Any request to change the MTU value above the maximum range will change the MTU to the max allowed, but will not show any warning message. An ipoib_warn is issued in such cases, letting the user know that even though the value is legal, it can't be currently applied. Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Noa Osherovich <noaos@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds2-2/+2
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-15Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdmaLinus Torvalds8-66/+67
Pull rdma updates from Doug Ledford: "This is the complete update for the rdma stack for this release cycle. Most of it is typical driver and core updates, but there is the entirely new VMWare pvrdma driver. You may have noticed that there were changes in DaveM's pull request to the bnxt Ethernet driver to support a RoCE RDMA driver. The bnxt_re driver was tentatively set to be pulled in this release cycle, but it simply wasn't ready in time and was dropped (a few review comments still to address, and some multi-arch build issues like prefetch() not working across all arches). Summary: - shared mlx5 updates with net stack (will drop out on merge if Dave's tree has already been merged) - driver updates: cxgb4, hfi1, hns-roce, i40iw, mlx4, mlx5, qedr, rxe - debug cleanups - new connection rejection helpers - SRP updates - various misc fixes - new paravirt driver from vmware" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (210 commits) IB: Add vmw_pvrdma driver IB/mlx4: fix improper return value IB/ocrdma: fix bad initialization infiniband: nes: return value of skb_linearize should be handled MAINTAINERS: Update Intel RDMA RNIC driver maintainers MAINTAINERS: Remove Mitesh Ahuja from emulex maintainers IB/core: fix unmap_sg argument qede: fix general protection fault may occur on probe IB/mthca: Replace pci_pool_alloc by pci_pool_zalloc mlx5, calc_sq_size(): Make a debug message more informative mlx5: Remove a set-but-not-used variable mlx5: Use { } instead of { 0 } to init struct IB/srp: Make writing the add_target sysfs attr interruptible IB/srp: Make mapping failures easier to debug IB/srp: Make login failures easier to debug IB/srp: Introduce a local variable in srp_add_one() IB/srp: Fix CONFIG_DYNAMIC_DEBUG=n build IB/multicast: Check ib_find_pkey() return value IPoIB: Avoid reading an uninitialized member variable IB/mad: Fix an array index check ...
2016-12-14Merge branches 'misc', 'qedr', 'reject-helpers', 'rxe' and 'srp' into merge-testDoug Ledford5-32/+58
2016-12-14Merge branch 'mlx' into merge-testDoug Ledford1-2/+0
2016-12-14IB/srp: Make writing the add_target sysfs attr interruptibleBart Van Assche1-1/+4
Avoid that shutdown of srp_daemon is delayed if add_target_mutex is held by another process. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14IB/srp: Make mapping failures easier to debugBart Van Assche1-2/+10
Make it easier to figure out what is going on if memory mapping fails because more memory regions than mr_per_cmd are needed. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14IB/srp: Make login failures easier to debugBart Van Assche1-0/+3
If login fails because memory region allocation failed it can be hard to figure out what happened. Make it easier to figure out why login failed by logging a message if ib_alloc_mr() fails. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14IB/srp: Introduce a local variable in srp_add_one()Bart Van Assche1-8/+9
This patch makes the srp_add_one() code more compact and does not change any functionality. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14IB/srp: Fix CONFIG_DYNAMIC_DEBUG=n buildBart Van Assche1-5/+6
Avoid that the kernel build fails as follows if dynamic debug support is disabled: drivers/infiniband/ulp/srp/ib_srp.c:2272:3: error: implicit declaration of function 'DEFINE_DYNAMIC_DEBUG_METADATA' drivers/infiniband/ulp/srp/ib_srp.c:2272:33: error: 'ddm' undeclared (first use in this function) drivers/infiniband/ulp/srp/ib_srp.c:2275:39: error: '_DPRINTK_FLAGS_PRINT' undeclared (first use in this function) Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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