- 08 Dec, 2018 34 commits
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James Smart authored
Renumber one of the 0711 log messages so there isn't a duplication. Signed-off-by:
Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by:
James Smart <jsmart2021@gmail.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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James Smart authored
The driver is getting hit with 100s of RSCNs during remote port address changes. Each of those RSCN's ends up generating UNREG_RPI and REG_PRI mailbox commands. The discovery engine within the driver doesn't wait for the mailbox command completions. Instead it sets state flags and moves forward. At some point, there's a massive backlog of mailbox commands which take time for the adapter to process. Additionally, it appears there were duplicate events from the switch so the driver generated duplicate mailbox commands for the same remote port. During this window, failures on PLOGI and PRLI ELS's are see as the adapter is rejecting them as they are for remote ports that still have pending mailbox commands. Streamline the discovery engine so that PLOGI log checks for outstanding UNREG_RPIs and defer the processing until the commands complete. This better synchronizes the ELS transmission vs the RPI registrations. Filter out multiple UNREG_RPIs being queued up for the same remote port. Beef up log messages in this area. Signed-off-by:
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James Smart authored
The driver data structure for managing a mailbox command contained two context fields. Unfortunately, the context were considered "generic" to be used at the whim of the command code. Of course, one section of code used fields this way, while another did it that way, and eventually there were mixups. Refactored the structure so that the generic contexts become a node context and a buffer context and all code standardizes on their use. Signed-off-by:
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James Smart authored
Update manufacturer attribute to reflect Broadcom Inc, not Emulex Signed-off-by:
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James Smart authored
While trying to get adapter fw-log for a function whose buffsize was set to 0, kernel panic occurred. When buffsize is 0, the kernel buffer for the log won't be allocated. When fw log usage was enabled, it failed to check the buffer size, and log usage was started. Eventually the driver referenced the unallocated log buffer. Added checks of the buffer size before allowing fw logging to be enabled and added check for valid buffer if enabling fw log. Performed a couple other minor cleanups while fixing this: - clarified log messages - re-evaluated log message severity - treat any error as an error, not only a couple codes Signed-off-by:
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James Bottomley authored
dma_addr_t can be u64 on pae systems but isa_virt_to_bus only ever returns unsigned long (because an ISA physical address can only be 24 bits). Cast to unsigned long to avoid division. Fixes: 1794ef2b ("scsi: aha1542: convert to DMA mapping API") Signed-off-by:
James Bottomley <James.Bottomley@HansenPartnership.com> Reviewed-by:
Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Steffen Maier authored
Complements v2.6.35 commit 64deb6ef ("[SCSI] zfcp: Use status_read_buf_num provided by FCP channel") which replaced the hardcoded 16 with a variable value Also complements already existing fixups for above commit v2.6.35 commit 8d88cf3f ("[SCSI] zfcp: Update status read mempool") v3.10 commit 9edf7d75 ("[SCSI] zfcp: status read buffers on first adapter open with link down") Signed-off-by:
Steffen Maier <maier@linux.ibm.com> Reviewed-by:
Jens Remus <jremus@linux.ibm.com> Signed-off-by:
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Steffen Maier authored
Suppose adapter (open) recovery is between opened QDIO queues and before (the end of) initial posting of status read buffers (SRBs). This time window can be seconds long due to FSF_PROT_HOST_CONNECTION_INITIALIZING causing by design looping with exponential increase sleeps in the function performing exchange config data during recovery [zfcp_erp_adapter_strat_fsf_xconf()]. Recovery triggered by local link up. Suppose an event occurs for which the FCP channel would send an unsolicited notification to zfcp by means of a previously posted SRB. We saw it with local cable pull (link down) in multi-initiator zoning with multiple NPIV-enabled subchannels of the same shared FCP channel. As soon as zfcp_erp_adapter_strategy_open_fsf() starts posting the initial status read buffers from within the adapter's ERP thread, the channel does send an unsolicited notification. Since v2.6.27 commit d26ab06e ("[SCSI] zfcp: receiving an unsolicted status can lead to I/O stall"), zfcp_fsf_status_read_handler() schedules adapter->stat_work to re-fill the just consumed SRB from a work item. Now the ERP thread and the work item post SRBs in parallel. Both contexts call the helper function zfcp_status_read_refill(). The tracking of missing (to be posted / re-filled) SRBs is not thread-safe due to separate atomic_read() and atomic_dec(), in order to depend on posting success. Hence, both contexts can see atomic_read(&adapter->stat_miss) == 1. One of the two contexts posts one too many SRB. Zfcp gets QDIO_ERROR_SLSB_STATE on the output queue (trace tag "qdireq1") leading to zfcp_erp_adapter_shutdown() in zfcp_qdio_handler_error(). An obvious and seemingly clean fix would be to schedule stat_work from the ERP thread and wait for it to finish. This would serialize all SRB re-fills. However, we already have another work item wait on the ERP thread: adapter->scan_work runs zfcp_fc_scan_ports() which calls zfcp_fc_eval_gpn_ft(). The latter calls zfcp_erp_wait() to wait for all the open port recoveries during zfcp auto port scan, but in fact it waits for any pending recovery including an adapter recovery. This approach leads to a deadlock. [see also v3.19 commit 18f87a67 ("zfcp: auto port scan resiliency"); v2.6.37 commit d3e1088d ("[SCSI] zfcp: No ERP escalation on gpn_ft eval"); v2.6.28 commit fca55b6f ("[SCSI] zfcp: fix deadlock between wq triggered port scan and ERP") fixing v2.6.27 commit c57a39a4 ("[SCSI] zfcp: wait until adapter is finished with ERP during auto-port"); v2.6.27 commit cc8c2829 ("[SCSI] zfcp: Automatically attach remote ports")] Instead make the accounting of missing SRBs atomic for parallel execution in both the ERP thread and adapter->stat_work. Signed-off-by:
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Rob Herring authored
Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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David Disseldorp authored
Initialise the t10_wwn vendor, model and revision defaults when a device is allocated instead of when it's enabled. This ensures that custom vendor or model strings set prior to enablement are not later overwritten with default values. The TRANSPORT_FLAG_PASSTHROUGH conditional can be dropped for the following reasons: - target_core_pscsi overwrites the defaults in the pscsi_configure_device() callback. + the contents is then only used for ConfigFS via $pscsi_dev/statistics/scsi_lu/vend, etc. - target_core_user doesn't touch the defaults, nor are they used for anything outside of ConfigFS. Signed-off-by:David Disseldorp <ddiss@suse.de> Reviewed-by:
Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by:
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David Disseldorp authored
Use the value stored in t10_wwn.vendor, which defaults to "LIO-ORG", but can be reconfigured via the vendor_id ConfigFS attribute. Signed-off-by:
Bryant G. Ly <bly@catalogicsoftware.com> Reviewed-by:
Lee Duncan <lduncan@suse.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Reviewed-by:
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David Disseldorp authored
The vendor_id attribute will allow for the modification of the T10 Vendor Identification string returned in inquiry responses. Its value can be viewed and modified via the ConfigFS path at: target/core/$backstore/$name/wwn/vendor_id "LIO-ORG" remains the default value, which is set when the backstore device is enabled. [mkp: corrected VPD page number] Signed-off-by:
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David Disseldorp authored
In preparation for supporting user provided vendor strings, add an extra byte to the vendor, model and revision arrays in struct t10_wwn. This ensures that the full INQUIRY data can be carried in the arrays along with a null-terminator. Change a number of array readers and writers so that they account for explicit null-termination: - The pscsi_set_inquiry_info() and emulate_model_alias_store() codepaths don't currently explicitly null-terminate; fix this. - Existing t10_wwn field dumps use for-loops which step over null-terminators for right-padding. + Use printf with width specifiers instead. Signed-off-by:
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David Disseldorp authored
spc5r17.pdf specifies: 4.3.1 ASCII data field requirements ASCII data fields shall contain only ASCII printable characters (i.e., code values 20h to 7Eh) and may be terminated with one or more ASCII null (00h) characters. ASCII data fields described as being left-aligned shall have any unused bytes at the end of the field (i.e., highest offset) and the unused bytes shall be filled with ASCII space characters (20h). LIO currently space-pads the T10 VENDOR IDENTIFICATION and PRODUCT IDENTIFICATION fields in the standard INQUIRY data. However, the PRODUCT REVISION LEVEL field in the standard INQUIRY data as well as the T10 VENDOR IDENTIFICATION field in the INQUIRY Device Identification VPD Page are zero-terminated/zero-padded. Fix this inconsistency by using space-padding for all of the above fields. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
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Thomas Meyer authored
NULL check before some freeing functions is not needed. Signed-off-by:
Thomas Meyer <thomas@m3y3r.de> Acked-by:
Himanshu Madhani <hmadhani@marvell.com> Signed-off-by:
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Thomas Meyer authored
NULL check before some freeing functions is not needed. Signed-off-by:
Manish Rangankar <Manish.Rangankar@cavium.com> Signed-off-by:
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Thomas Meyer authored
NULL check before some freeing functions is not needed. Signed-off-by:
Sumit Saxena <sumit.saxena@broadcom.com> Signed-off-by:
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Bart Van Assche authored
Nesting in __qla2x00_abort_all_cmds() is way too deep. Reduce the nesting level by introducing a helper function. This patch does not change any functionality. Reviewed-by:
Laurence Oberman <loberman@redhat.com> Acked-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by:
Bart Van Assche <bvanassche@acm.org> Signed-off-by:
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Varun Prakash authored
flush_scheduled_work() is not required as csio_hw_exit_workers() calls cancel_work_sync() for hw->evtq_work. Signed-off-by:
Varun Prakash <varun@chelsio.com> Signed-off-by:
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Fedor Loshakov authored
Introduce separate zfcp module parameters to individually select support for: DIF which should work (zfcp.dif, which used to be DIF+DIX, disabled) or DIX+DIF which can cause trouble (zfcp.dix, new, disabled). If DIX is enabled, we warn on zfcp driver initialization. As before, this also reduces the maximum I/O request size to half, to support the worst case of merged single sector requests with one protection data scatter gather element per sector. This can impact the maximum throughput. In DIF-only mode (zfcp.dif=1 zfcp.dix=0), we can use the full maximum I/O request size as there is no protection data for zfcp. Signed-off-by:
Fedor Loshakov <loshakov@linux.ibm.com> Reviewed-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1056537 ("Missing break in switch") Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by:
Khalid Aziz <khalid@gonehiking.org> Signed-off-by:
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Avri Altman authored
By spec, the ufs sense data is 18 bytes long. Signed-off-by:
Avri Altman <avri.altman@wdc.com> Signed-off-by:
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Sabyasachi Gupta authored
Replaced vmalloc + memset with vzalloc Signed-off-by:
Sabyasachi Gupta <sabyasachi.linux@gmail.com> Acked-by:
Sesidhar Baddela <sebaddel@cisco.com> Signed-off-by:
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Sabyasachi Gupta authored
Replaced vmalloc + memset with vzalloc Signed-off-by:
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Bart Van Assche authored
Due to the "make ABORT and LUN RESET handling synchronous" patch, cmd->work is only modified from the regular command execution path and no longer asynchronously by the code that executes task management functions. Since the regular command execution code is sequential per command, no locking is required to manipulate cmd->work. Hence stop protecting cmd->work manipulations with locking. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
Instead of invoking target driver callback functions from the context that handles an abort or LUN RESET task management function, only set the abort flag from that context and perform the actual abort handling from the context of the regular command processing flow. This approach has the advantage that the task management code becomes much easier to read and to verify since the number of potential race conditions against the command processing flow is strongly reduced. This patch has been tested by running the following two shell commands concurrently for about ten minutes for both the iSCSI and the SRP target drivers ($dev is an initiator device node connected with storage provided by the target driver under test): * fio with data verification enabled on a filesystem mounted on top of $dev. * while true; do sg_reset -d $dev; echo -n .; sleep .1; done Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
The TASK ABORTED STATUS (TAS) bit is defined as follows in SAM: "TASK_ABORTED: this status shall be returned if a command is aborted by a command or task management function on another I_T nexus and the control mode page TAS bit is set to one". TAS handling is spread over the target core and the iSCSI target driver. If a LUN RESET is received, the target core will send the TASK_ABORTED response for all commands for which such a response has to be sent. If an ABORT TASK is received, only the iSCSI target driver will send the TASK_ABORTED response for the commands for which that response has to be sent. That is a bug since all target drivers have to honor the TAS bit. Fix this by moving the code that handles TAS from the iSCSI target driver into the target core. Additionally, if a command has been aborted, instead of sending the TASK_ABORTED status from the context that processes the SCSI command send it from the context of the ABORT TMF. The core_tmr_abort_task() change in this patch causes the CMD_T_TAS flag to be set if a TASK_ABORTED status has to be sent back to the initiator that submitted the command. If that flag has been set transport_cmd_finish_abort() will send the TASK_ABORTED response. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
Instead of allowing the code that aborts a SCSI command to finish before all iSCSI data frames have been received, make that code wait until all iSCSI data frames have been received. Introduce a new member variable in the target driver template to communicate that information from the iSCSI target driver to the target core. This change allows to leave out the check whether or not it is already safe to send the TASK_ABORTED reply from transport_send_task_abort(). Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality but makes the patch that makes TMF handling synchronous easier to read. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
A quote from SAM-5: "The order in which task management requests are processed is not specified by the SCSI architecture model. The SCSI architecture model does not require in-order delivery of such task management requests or processing by the task manager in the order received. To guarantee the processing order of task management requests referencing sent to a specific logical unit, an application client should not have more than one such task management request pending to that logical unit." This means that it is safe to use the system workqueues instead of tmr_wq for processing TMFs. An intended side effect of this patch is that it enables concurrent processing of TMFs. Reviewed-by:
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Bart Van Assche authored
A session must only be released after all code that accesses the session structure has finished. Make sure that this is the case by introducing a new command counter per session that is only decremented after the .release_cmd() callback has finished. This patch fixes the following crash: BUG: KASAN: use-after-free in do_raw_spin_lock+0x1c/0x130 Read of size 4 at addr ffff8801534b16e4 by task rmdir/14805 CPU: 16 PID: 14805 Comm: rmdir Not tainted 4.18.0-rc2-dbg+ #5 Call Trace: dump_stack+0xa4/0xf5 print_address_description+0x6f/0x270 kasan_report+0x241/0x360 __asan_load4+0x78/0x80 do_raw_spin_lock+0x1c/0x130 _raw_spin_lock_irqsave+0x52/0x60 srpt_set_ch_state+0x27/0x70 [ib_srpt] srpt_disconnect_ch+0x1b/0xc0 [ib_srpt] srpt_close_session+0xa8/0x260 [ib_srpt] target_shutdown_sessions+0x170/0x180 [target_core_mod] core_tpg_del_initiator_node_acl+0xf3/0x200 [target_core_mod] target_fabric_nacl_base_release+0x25/0x30 [target_core_mod] config_item_release+0x9c/0x110 [configfs] config_item_put+0x26/0x30 [configfs] configfs_rmdir+0x3b8/0x510 [configfs] vfs_rmdir+0xb3/0x1e0 do_rmdir+0x262/0x2c0 do_syscall_64+0x77/0x230 entry_SYSCALL_64_after_hwframe+0x49/0xbe Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
Since transport_clear_lun_ref() already waits until the percpu-refcount .release() method is called, it is not necessary to wait first until percpu_ref_kill_and_confirm() has finished transitioning the refcount into atomic mode. Remove the code that waits for percpu_ref_kill_and_confirm() to complete and also the completion object that is used by that code. This patch does not change the behavior of the SCSI target code. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Disseldorp <ddiss@suse.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Note: the code that frees sess_cmd_map already uses kvfree() so that code does not need to be modified. Reviewed-by:
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Bart Van Assche authored
This patch does not change any functionality but avoids that sparse complains about the queue_cmd_ring() function and its callers. Fixes: 6fd0ce79 ("tcmu: prep queue_cmd_ring to be used by unmap wq") Reviewed-by:
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- 29 Nov, 2018 6 commits
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Notice that, in this particular case, I replaced "Missed the backend's Closing state -- fallthrough" with "fall through - Missed the backend's Closing state", which contains the "fall through" annotation at the beginnig of the code comment, which is what GCC is expecting to find. Signed-off-by:
Juergen Gross <jgross@suse.com> Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Notice that, in this particular case, I replaced "Fall thru" with a "Fall through" annotation and added a dash as a token in order to separate the "Fall through" annotation from the rest of the comment on the same line, which is what GCC is expecting to find. Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by:
Johannes Thumshirn <jth@kernel.org> Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1195463 ("Missing break in switch") Addresses-Coverity-ID: 1195464 ("Missing break in switch") Addresses-Coverity-ID: 1195465 ("Missing break in switch") Addresses-Coverity-ID: 1195466 ("Missing break in switch") Addresses-Coverity-ID: 1357338 ("Missing break in switch") Signed-off-by:Don Brace <don.brace@microsemi.com> Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by:
Dave Carroll <david.carroll@microsemi.com> Signed-off-by:
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