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* scsi: target: core: Send max transfer length in blocksAnastasia Kovaleva2022-11-241-1/+0
| | | | | | | | | | | | | | | | A MAXIMUM TRANSFER LENGTH value indicates the maximum transfer length in logical blocks that the device server accepts for a single command. Fix function sending the length in sectors instead of blocks. This patch also removes the special casing for fileio in block_size_store since this logic in now unified in spc_emulate_evpd_b0() for all backends. Reviewed-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Reviewed-by: Dmitriy Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Anastasia Kovaleva <a.kovaleva@yadro.com> Link: https://lore.kernel.org/r/20221114102500.88892-2-a.kovaleva@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Dynamically set DPO and FUA in usage_bitsDmitry Bogdanov2022-10-271-0/+2
| | | | | | | | | | | | | | libiscsi tests check the support of DPO & FUA bits in usage bits of RSOC response. This patch adds support for dynamic usage bits for each opcode. Set support of DPO & FUA bits in usage_bits of RSOC response depending on support DPOFUA in the backstore device. Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20220906103421.22348-7-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add emulate_rsoc attributeDmitry Bogdanov2022-10-271-0/+3
| | | | | | | | | | | Allow support for RSOC to be turned off via the emulate_rsoc attibute. This is just for testing purposes. Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20220906103421.22348-5-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Dynamic opcode support in RSOCDmitry Bogdanov2022-10-271-0/+1
| | | | | | | | | | Report supported opcodes depending on a dynamic device configuration. Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20220906103421.22348-4-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add support for RSOC commandDmitry Bogdanov2022-10-271-0/+12
| | | | | | | | | | Add support for REPORT SUPPORTED OPERATION CODES command according to SPC4. Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Link: https://lore.kernel.org/r/20220906103421.22348-2-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: De-RCU of se_lun and se_lun aclDmitry Bogdanov2022-08-011-2/+2
| | | | | | | | | | se_lun and se_lun_acl are immutable pointers of struct se_dev_entry. Remove RCU usage for access to those pointers. Link: https://lore.kernel.org/r/20220727214125.19647-3-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Add callout to configure UNMAP settingsMike Christie2022-07-071-0/+1
| | | | | | | | | | | Add a callout to configure a backend's UNMAP settings. This will be used to allow userspace to configure UNMAP after the initial device setup, similar to how we can set up the other attributes post device configuration. Link: https://lore.kernel.org/r/20220628200230.15052-3-michael.christie@oracle.com Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: iscsi: Control authentication per ACLDmitry Bogdanov2022-06-071-0/+2
| | | | | | | | | | | | | | | | | | | | | | Add acls/{ACL}/attrib/authentication attribute that controls authentication for particular ACL. By default, this attribute inherits a value of the authentication attribute of the target port group to keep backward compatibility. Authentication attribute has 3 states: "0" - authentication is turned off for this ACL "1" - authentication is required for this ACL "-1" - authentication is inherited from TPG Link: https://lore.kernel.org/r/20220523095905.26070-4-d.bogdanov@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: iscsi: Add upcast helpersDmitry Bogdanov2022-06-071-0/+12
| | | | | | | | | | | | | | | | | iSCSI target is cluttered with open-coded container_of() conversions from se_nacl to iscsi_node_acl. The code could be cleaned by introducing a helper - to_iscsi_nacl() (similar to other helpers in target core). While at it, make another iSCSI conversion helper consistent and rename iscsi_tpg() helper to to_iscsi_tpg(). Link: https://lore.kernel.org/r/20220523095905.26070-2-d.bogdanov@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds2022-05-252-89/+89
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull SCSI updates from James Bottomley: "This consists of a small set of driver updates (lpfc, ufs, mpt3sas mpi3mr, iscsi target). Apart from that this is mostly small fixes with very few core changes (the biggest one being VPD caching)" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (177 commits) scsi: target: tcmu: Avoid holding XArray lock when calling lock_page scsi: elx: efct: Remove NULL check after calling container_of() scsi: dpt_i2o: Drop redundant spinlock initialization scsi: qedf: Remove redundant variable op scsi: hisi_sas: Fix memory ordering in hisi_sas_task_deliver() scsi: fnic: Replace DMA mask of 64 bits with 47 bits scsi: mpi3mr: Add target device related sysfs attributes scsi: mpi3mr: Add shost related sysfs attributes scsi: elx: efct: Remove redundant memset() statement scsi: megaraid_sas: Remove redundant memset() statement scsi: mpi3mr: Return error if dma_alloc_coherent() fails scsi: hisi_sas: Fix rescan after deleting a disk scsi: hisi_sas: Use sas_ata_wait_after_reset() in IT nexus reset scsi: libsas: Refactor sas_ata_hard_reset() scsi: mpt3sas: Update driver version to 42.100.00.00 scsi: mpt3sas: Fix junk chars displayed while printing ChipName scsi: ipr: Use kobj_to_dev() scsi: mpi3mr: Fix a NULL vs IS_ERR() bug in mpi3mr_bsg_init() scsi: bnx2fc: Avoid using get_cpu() in bnx2fc_cmd_alloc() scsi: libfc: Remove get_cpu() semantics in fc_exch_em_alloc() ...
| * scsi: target: iscsi: Rename iscsi_session to iscsit_sessionMax Gurtovoy2022-05-102-6/+6
| | | | | | | | | | | | | | | | | | | | | | The structure iscsi_session naming is used by the iSCSI initiator driver. Rename the target session to iscsit_session to have more readable code. Link: https://lore.kernel.org/r/20220428092939.36768-3-mgurtovoy@nvidia.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: target: iscsi: Rename iscsi_conn to iscsit_connMax Gurtovoy2022-05-102-55/+55
| | | | | | | | | | | | | | | | | | | | The structure iscsi_conn naming is used by the iSCSI initiator driver. Rename the target conn to iscsit_conn to have more readable code. Link: https://lore.kernel.org/r/20220428092939.36768-2-mgurtovoy@nvidia.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: target: iscsi: Rename iscsi_cmd to iscsit_cmdMax Gurtovoy2022-05-102-63/+63
| | | | | | | | | | | | | | | | | | | | The structure iscsi_cmd naming is used by the iSCSI initiator driver. Rename the target cmd to iscsit_cmd to have more readable code. Link: https://lore.kernel.org/r/20220428092939.36768-1-mgurtovoy@nvidia.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* | target: pass a block_device to target_configure_unmap_from_queueChristoph Hellwig2022-04-171-2/+2
|/ | | | | | | | | | | The SCSI target drivers is a consumer of the block layer and shoul d generally work on struct block_device. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220415045258.199825-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
* scsi: target: Add iscsi/cpus_allowed_list in configfsMingzhe Zou2022-03-141-25/+6
| | | | | | | | | | | | | | | | | The RX/TX threads for iSCSI connection can be scheduled to any online CPUs, and will not be rescheduled. When binding other heavy load threads along with iSCSI connection RX/TX thread to the same CPU, the iSCSI performance will be worse. Add iscsi/cpus_allowed_list in configfs. The available CPU set of iSCSI connection RX/TX threads is allowed_cpus & online_cpus. If it is modified, all RX/TX threads will be rescheduled. Link: https://lore.kernel.org/r/20220301075500.14266-1-mingzhe.zou@easystack.cn Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Mingzhe Zou <mingzhe.zou@easystack.cn> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Replace lun_tg_pt_gp_lock with rcu in I/O pathMike Christie2021-10-181-1/+1
| | | | | | | | | | | | | | | | | | | We are only holding the lun_tg_pt_gp_lock in target_alua_state_check() to make sure tg_pt_gp is not freed from under us while we copy the state, delay, ID values. We can instead use RCU here to access the tg_pt_gp. With this patch IOPs can increase up to 10% for jobs like: fio --filename=/dev/sdX --direct=1 --rw=randrw --bs=4k \ --ioengine=libaio --iodepth=64 --numjobs=N when there are multiple sessions (running that fio command to each /dev/sdX or using multipath and there are over 8 paths), or more than 8 queues for the loop or vhost with multiple threads case and numjobs > 8. Link: https://lore.kernel.org/r/20210930020422.92578-5-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Fix ordered tag handlingMike Christie2021-10-181-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following bugs: 1. If there are multiple ordered cmds queued and multiple simple cmds completing, target_restart_delayed_cmds() could be called on different CPUs and each instance could start a ordered cmd. They could then run in different orders than they were queued. 2. target_restart_delayed_cmds() and target_handle_task_attr() can race where: 1. target_handle_task_attr() has passed the simple_cmds == 0 check. 2. transport_complete_task_attr() then decrements simple_cmds to 0. 3. transport_complete_task_attr() runs target_restart_delayed_cmds() and it does not see any cmds on the delayed_cmd_list. 4. target_handle_task_attr() adds the cmd to the delayed_cmd_list. The cmd will then end up timing out. 3. If we are sent > 1 ordered cmds and simple_cmds == 0, we can execute them out of order, because target_handle_task_attr() will hit that simple_cmds check first and return false for all ordered cmds sent. 4. We run target_restart_delayed_cmds() after every cmd completion, so if there is more than 1 simple cmd running, we start executing ordered cmds after that first cmd instead of waiting for all of them to complete. 5. Ordered cmds are not supposed to start until HEAD OF QUEUE and all older cmds have completed, and not just simple. 6. It's not a bug but it doesn't make sense to take the delayed_cmd_lock for every cmd completion when ordered cmds are almost never used. Just replacing that lock with an atomic increases IOPs by up to 10% when completions are spread over multiple CPUs and there are multiple sessions/ mqs/thread accessing the same device. This patch moves the queued delayed handling to a per device work to serialze the cmd executions for each device and adds a new counter to track HEAD_OF_QUEUE and SIMPLE cmds. We can then check the new counter to determine when to run the work on the completion path. Link: https://lore.kernel.org/r/20210930020422.92578-3-michael.christie@oracle.com Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add common tpg/enable attributeDmitry Bogdanov2021-10-042-0/+2
| | | | | | | | | | | | | | | Many fabric modules provide their own implementation of enable attribute in tpg. Provide a way to remove code duplication in the fabric modules and automatically add "enable" attribute if a fabric module has an implementation of fabric_enable_tpg(). Link: https://lore.kernel.org/r/20210910084133.17956-2-d.bogdanov@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Allows backend drivers to fail with specific sense codesSergey Samoylenko2021-08-172-0/+3
| | | | | | | | | | | | | | | | Currently, backend drivers can fail I/O with SAM_STAT_CHECK_CONDITION which gets us TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE. Add a new helper that allows backend drivers to fail with specific sense codes. This is based on a patch from Mike Christie <michael.christie@oracle.com>. Cc: Mike Christie <michael.christie@oracle.com> Link: https://lore.kernel.org/r/20210803145410.80147-2-s.samoylenko@yadro.com Reviewed-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Sergey Samoylenko <s.samoylenko@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Drop unnecessary se_cmd ASC/ASCQ membersDavid Disseldorp2021-08-031-3/+5
| | | | | | | | | | These members are only used for ALUA sense detail propagation, which can just as easily be done via sense_reason_t. Link: https://lore.kernel.org/r/20210728115353.2396-4-ddiss@suse.de Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add configurable IEEE Company ID attributeSergey Samoylenko2021-05-151-0/+1
| | | | | | | | | | | | | | Implement an attribute which provides a way to set a company specific WWN in configfs via: target/core/$backstore/$name/wwn/company_id The Open Fabrics Alliance ID 001405h remains the default. Link: https://lore.kernel.org/r/20210420185920.42431-3-s.samoylenko@yadro.com Signed-off-by: Sergey Samoylenko <s.samoylenko@yadro.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Make completion affinity configurableMike Christie2021-03-041-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It may not always be best to complete the IO on same CPU as it was submitted on. This commit allows userspace to configure it. This has been useful for vhost-scsi where we have a single thread for submissions and completions. If we force the completion on the submission CPU we may be adding conflicts with what the user has setup in the lower levels with settings like the block layer rq_affinity or the driver's IRQ or softirq (the network's rps_cpus value) settings. We may also want to set it up where the vhost thread runs on CPU N and does its submissions/completions there, and then have LIO do its completion booking on CPU M, but can't configure the lower levels due to issues like using dm-multipath with lots of paths (the path selector can throw commands all over the system because it's only taking into account latency/throughput at its level). The new setting is in: /sys/kernel/config/target/$fabric/$target/param/cmd_completion_affinity Writing: -1 -> Gives the current default behavior of completing on the submission CPU. -2 -> Completes the cmd on the CPU the lower layers sent it to us from. > 0 -> Completes on the CPU userspace has specified. Link: https://lore.kernel.org/r/20210227170006.5077-26-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Fix backend pluggingMike Christie2021-03-042-0/+6
| | | | | | | | | | | | | | | target_core_iblock is plugging and unplugging on every command and this is causing perf issues for drivers that prefer batched cmds. With recent patches we can now take multiple cmds from a fabric driver queue and then pass them down the backend drivers in a batch. This patch adds this support by adding 2 callouts to the backend for plugging and unplugging the device. Subsequent commits will add support for iblock and tcmu device plugging. Link: https://lore.kernel.org/r/20210227170006.5077-22-michael.christie@oracle.com Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Cleanup cmd flag bitsMike Christie2021-03-041-19/+19
| | | | | | | | | | | | We have a couple holes in the cmd flags definitions. This cleans up the definitions to fix that and make it easier to read. Link: https://lore.kernel.org/r/20210227170006.5077-21-michael.christie@oracle.com Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add workqueue based cmd submissionMike Christie2021-03-042-1/+9
| | | | | | | | | | | | | | | | | | | | | | loop and vhost/scsi do their target cmd submission from driver workqueues. This allows them to avoid an issue where the backend may block waiting for resources like tags/requests, mem/locks, etc and that ends up blocking their entire submission path and for the case of vhost-scsi both the submission and completion path. This patch adds a helper drivers can use to submit from a LIO workqueue. This code will then be extended in the next patches to fix the plugging of backend devices. We are only converting vhost/loop initially, but the workqueue based submission will work for other drivers and have similar benefits where the main target loops will not end up blocking one some backend resource. Link: https://lore.kernel.org/r/20210227170006.5077-17-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add gfp_t arg to target_cmd_init_cdb()Mike Christie2021-03-041-2/+3
| | | | | | | | | | | | | | | | | tcm_loop could be used like a normal block device, so we can't use GFP_KERNEL and should use GFP_NOIO. This adds a gfp_t arg to target_cmd_init_cdb() and converts the users. For every driver but loop GFP_KERNEL is kept. This will also be useful in subsequent patches where loop needs to do target_submit_prep() from interrupt context to get a ref to the se_device, and so it will need to use GFP_ATOMIC. Link: https://lore.kernel.org/r/20210227170006.5077-16-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Remove target_submit_cmd_map_sgls()Mike Christie2021-03-041-5/+1
| | | | | | | | | | | Convert target_submit_cmd() to do its own calls and then remove target_submit_cmd_map_sgls() since no one uses it. Link: https://lore.kernel.org/r/20210227170006.5077-15-michael.christie@oracle.com Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Break up target_submit_cmd_map_sgls()Mike Christie2021-03-041-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This breaks up target_submit_cmd_map_sgls() into 3 helpers: - target_init_cmd(): Do the basic general setup and get a refcount to the session to make sure the caller can execute the cmd. - target_submit_prep(): Do the mapping, cdb processing and get a ref to the LUN. - target_submit(): Pass the cmd to LIO core for execution. The above functions must be used by drivers that either: 1. Rely on LIO for session shutdown synchronization by calling target_stop_session(). 2. Need to map sgls. When the next patches are applied then simple drivers that do not need the extra functionality above can use target_submit_cmd() and not worry about failures being returned and how to handle them, since many drivers were getting this wrong and would have hit refcount bugs. Also, by breaking target_submit_cmd_map_sgls() up into these 3 helper functions, we can allow the later patches to do the init/prep from interrupt context and then do the submission from a workqueue. Link: https://lore.kernel.org/r/20210227170006.5077-5-michael.christie@oracle.com Cc: Bart Van Assche <bvanassche@acm.org> Cc: Juergen Gross <jgross@suse.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Nilesh Javali <njavali@marvell.com> Cc: Michael Cyr <mikecyr@linux.ibm.com> Cc: Chris Boot <bootc@bootc.net> Cc: Felipe Balbi <balbi@kernel.org> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Laurence Oberman <loberman@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Rename transport_init_se_cmd()Mike Christie2021-03-041-1/+1
| | | | | | | | | | | | Rename transport_init_se_cmd() to __target_init_cmd() to reflect that it is more of an internal function that drivers should normally not use and because we are going to add a new init function in the next patches. Link: https://lore.kernel.org/r/20210227170006.5077-4-michael.christie@oracle.com Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Add cmd length set before cmd completeAleksandr Miloserdov2021-02-221-0/+1
| | | | | | | | | | | | | | | | TCM doesn't properly handle underflow case for service actions. One way to prevent it is to always complete command with target_complete_cmd_with_length(), however it requires access to data_sg, which is not always available. This change introduces target_set_cmd_data_length() function which allows to set command data length before completing it. Link: https://lore.kernel.org/r/20210209072202.41154-2-a.miloserdov@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Aleksandr Miloserdov <a.miloserdov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: core: Change ASCQ for residual writeAnastasia Kovaleva2021-01-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to FCP-4 (9.4.2): If the command requested that data beyond the length specified by the FCP_DL field be transferred, then the device server shall set the FCP_RESID_OVER bit (see 9.5.8) to one in the FCP_RSP IU and: a) process the command normally except that data beyond the FCP_DL count shall not be requested or transferred; b) transfer no data and return CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN COMMAND INFORMATION UNIT; or c) may transfer data and return CHECK CONDITION status with the sense key set to ABORTED COMMAND and the additional sense code set to INVALID FIELD IN COMMAND INFORMATION UNIT. TCM follows b) and transfers no data for residual writes but returns INVALID FIELD IN CDB instead of INVALID FIELD IN COMMAND INFORMATION UNIT. Change the ASCQ to INVALID FIELD IN COMMAND INFORMATION UNIT to meet the standard. Link: https://lore.kernel.org/r/20201203082035.54566-4-a.kovaleva@yadro.com Signed-off-by: Anastasia Kovaleva <a.kovaleva@yadro.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Make state_list per CPUMike Christie2020-11-041-2/+11
| | | | | | | | | | | | | | | | Do a state_list/execute_task_lock per CPU, so we can do submissions from different CPUs without contention with each other. Note: tcm_fc was passing TARGET_SCF_USE_CPUID, but never set cpuid. The assumption is that it wanted to set the cpuid to the CPU it was submitting from so it will get this behavior with this patch. [mkp: s/printk/pr_err/ + resolve COMPARE AND WRITE patch conflict] Link: https://lore.kernel.org/r/1604257174-4524-8-git-send-email-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Drop sess_cmd_lock from I/O pathMike Christie2020-11-042-4/+4
| | | | | | | | | | | | | | | | Drop the sess_cmd_lock by: - Removing the sess_cmd_list use from LIO core, because it's been moved to qla2xxx. - Removing sess_tearing_down check in the I/O path. Instead of using that bit and the sess_cmd_lock, we rely on the cmd_count percpu ref. To do this we switch to percpu_ref_kill_and_confirm/percpu_ref_tryget_live. Link: https://lore.kernel.org/r/1604257174-4524-7-git-send-email-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Remove TARGET_SCF_LOOKUP_LUN_FROM_TAGMike Christie2020-11-041-1/+0
| | | | | | | | | TARGET_SCF_LOOKUP_LUN_FROM_TAG is no longer used so remove it. Link: https://lore.kernel.org/r/1604257174-4524-5-git-send-email-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Rename cmd.bad_sector to cmd.sense_infoDavid Disseldorp2020-11-041-1/+1
| | | | | | | | | | | | | | | | | | cmd.bad_sector currently gets packed into the sense INFORMATION field for TCM_LOGICAL_BLOCK_{GUARD,APP_TAG,REF_TAG}_CHECK_FAILED errors, which carry an .add_sector_info flag in the sense_detail_table to ensure this. In preparation for propagating a byte offset on COMPARE AND WRITE TCM_MISCOMPARE_VERIFY error, rename cmd.bad_sector to cmd.sense_info and sense_detail.add_sector_info to sense_detail.add_sense_info so that it better reflects the sense INFORMATION field destination. [ddiss: update previously overlooked ib_isert] Link: https://lore.kernel.org/r/20201031233211.5207-3-ddiss@suse.de Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Make iscsit_register_transport() return voidMax Gurtovoy2020-08-041-1/+1
| | | | | | | | | This function always returns 0. We can make it return void to simplify the code. Also, no caller ever checks the return value of this function. Link: https://lore.kernel.org/r/20200803150008.83920-1-maxg@mellanox.com Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Add tmr_notify backend functionBodo Stroesser2020-07-282-0/+3
| | | | | | | | | | | | | Target core is modified to call an optional backend callback function if a TMR is received or commands are aborted implicitly after a PR command was received. The backend function takes as parameters the se_dev, the type of the TMR, and the list of aborted commands. If no commands were aborted, an empty list is supplied. Link: https://lore.kernel.org/r/20200726153510.13077-3-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: iscsi: Fix login error when receivingHou Pu2020-07-281-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | iscsi_target_sk_data_ready() could be invoked indirectly by iscsi_target_do_login_rx() from the workqueue like this: iscsi_target_do_login_rx() iscsi_target_do_login() iscsi_target_do_tx_login_io() iscsit_put_login_tx() iscsi_login_tx_data() tx_data() sock_sendmsg_nosec() tcp_sendmsg() release_sock() sk_backlog_rcv() tcp_v4_do_rcv() tcp_data_ready() iscsi_target_sk_data_ready() At that time LOGIN_FLAGS_READ_ACTIVE is not cleared and iscsi_target_sk_data_ready will not read data from the socket. Some iscsi initiators (libiscsi) will wait forever for a reply. LOGIN_FLAGS_READ_ACTIVE should be cleared early just after doing the receive and before writing to the socket in iscsi_target_do_login_rx. Unfortunately, LOGIN_FLAGS_READ_ACTIVE is also used by sk_state_change to do login cleanup if a socket was closed at login time. It is supposed to be cleared after the login PDU is successfully processed and replied. Introduce another flag, LOGIN_FLAGS_WRITE_ACTIVE, to cover the transmit part. Link: https://lore.kernel.org/r/20200716100212.4237-2-houpu@bytedance.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Hou Pu <houpu@bytedance.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Rename target_setup_cmd_from_cdb() to target_cmd_parse_cdb()Sudhakar Panneerselvam2020-06-091-1/+1
| | | | | | | | | | This commit also removes the unused argument, cdb, that was passed to this function. Link: https://lore.kernel.org/r/1591559913-8388-5-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Initialize LUN in transport_init_se_cmd()Sudhakar Panneerselvam2020-06-091-3/+3
| | | | | | | | | | | | | | Initialization of orig_fe_lun is moved to transport_init_se_cmd() from transport_lookup_cmd_lun(). This helps for the cases where the SCSI request fails before the call to transport_lookup_cmd_lun() so that trace_target_cmd_complete() can print the LUN information to the trace buffer. Due to this change, the lun parameter is removed from transport_lookup_cmd_lun() and transport_lookup_tmr_lun(). Link: https://lore.kernel.org/r/1591559913-8388-3-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Factor out a new helper, target_cmd_init_cdb()Sudhakar Panneerselvam2020-06-091-0/+1
| | | | | | | | | | | | target_setup_cmd_from_cdb() is called after a successful call to transport_lookup_cmd_lun(). The new helper factors out the code that can be called before the call to transport_lookup_cmd_lun(). This helper will be used in an upcoming commit to address NULL pointer dereference. Link: https://lore.kernel.org/r/1591559913-8388-2-git-send-email-sudhakar.panneerselvam@oracle.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Sudhakar Panneerselvam <sudhakar.panneerselvam@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: tcmu: Make pgr_support and alua_support attributes writableBodo Stroesser2020-05-071-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently in tcmu reservation commands are handled by core's pr implementation (default) or completely rejected (emulate_pr set to 0). We additionally want to be able to do full reservation handling in userspace. Therefore we need a way to set TRANSPORT_FLAG_PASSTHROUGH_PGR. The inverted flag is displayed by attribute pgr_support. Since we moved the flag from transport/backend to se_device in the previous commit, we now can make it changeable per device by allowing to write the attribute. The new field transport_flags_changeable in transport/backend is used to reject writing if not allowed for a backend. Regarding ALUA we also want to be able to passthrough commands to userspace in tcmu. Therefore we need TRANSPORT_FLAG_PASSTHROUGH_ALUA to be changeable, because by setting it we can switch off all ALUA checks in core. So we also set TRANSPORT_FLAG_PASSTHROUGH_ALUA in tcmu's transport_flags_changeable. Of course, ALUA and reservation handling in userspace will work only, if session/nexus information is sent to userspace along with every command. This will be object of a patch series announced by Mike Christie. Link: https://lore.kernel.org/r/20200427150823.15350-5-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: Make transport_flags per deviceBodo Stroesser2020-05-072-1/+2
| | | | | | | | | | | | | | | | | | | | pgr_support and alua_support device attributes show the inverted value of the transport_flags: * TRANSPORT_FLAG_PASSTHROUGH_PGR * TRANSPORT_FLAG_PASSTHROUGH_ALUA These attributes are per device, while the flags are per backend. Rename the transport_flags in backend/transport to transport_flags_default and use this value to initialize the new transport_flags field in the se_device structure. Now data and attribute both are per se_device. Link: https://lore.kernel.org/r/20200427150823.15350-4-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: tcmu: Add attributes enforce_pr_isids and force_pr_aptplBodo Stroesser2020-05-071-0/+1
| | | | | | | | | | | tcmu has not set TRANSPORT_FLAG_PASSTHROUGH_PGR. Therefore the in-core pr emulation is active by default, but there are some attributes for configuration missing. Add them. Link: https://lore.kernel.org/r/20200427150823.15350-3-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: iscsi: Remove the iscsi_data_count structureMaurizio Lombardi2020-04-241-10/+0
| | | | | | | | | | This patch removes the iscsi_data_count structure and the iscsit_do_rx_data() function because they are used only by rx_data() Link: https://lore.kernel.org/r/20200424113913.17237-1-mlombard@redhat.com Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: fix hang when multiple threads try to destroy the same iscsi ↵Maurizio Lombardi2020-03-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | session A number of hangs have been reported against the target driver; they are due to the fact that multiple threads may try to destroy the iscsi session at the same time. This may be reproduced for example when a "targetcli iscsi/iqn.../tpg1 disable" command is executed while a logout operation is underway. When this happens, two or more threads may end up sleeping and waiting for iscsit_close_connection() to execute "complete(session_wait_comp)". Only one of the threads will wake up and proceed to destroy the session structure, the remaining threads will hang forever. Note that if the blocked threads are somehow forced to wake up with complete_all(), they will try to free the same iscsi session structure destroyed by the first thread, causing double frees, memory corruptions etc... With this patch, the threads that want to destroy the iscsi session will increase the session refcount and will set the "session_close" flag to 1; then they wait for the driver to close the remaining active connections. When the last connection is closed, iscsit_close_connection() will wake up all the threads and will wait for the session's refcount to reach zero; when this happens, iscsit_close_connection() will destroy the session structure because no one is referencing it anymore. INFO: task targetcli:5971 blocked for more than 120 seconds. Tainted: P OE 4.15.0-72-generic #81~16.04.1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. targetcli D 0 5971 1 0x00000080 Call Trace: __schedule+0x3d6/0x8b0 ? vprintk_func+0x44/0xe0 schedule+0x36/0x80 schedule_timeout+0x1db/0x370 ? __dynamic_pr_debug+0x8a/0xb0 wait_for_completion+0xb4/0x140 ? wake_up_q+0x70/0x70 iscsit_free_session+0x13d/0x1a0 [iscsi_target_mod] iscsit_release_sessions_for_tpg+0x16b/0x1e0 [iscsi_target_mod] iscsit_tpg_disable_portal_group+0xca/0x1c0 [iscsi_target_mod] lio_target_tpg_enable_store+0x66/0xe0 [iscsi_target_mod] configfs_write_file+0xb9/0x120 __vfs_write+0x1b/0x40 vfs_write+0xb8/0x1b0 SyS_write+0x5c/0xe0 do_syscall_64+0x73/0x130 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Link: https://lore.kernel.org/r/20200313170656.9716-3-mlombard@redhat.com Reported-by: Matt Coleman <mcoleman@datto.com> Tested-by: Matt Coleman <mcoleman@datto.com> Tested-by: Rahul Kundu <rahul.kundu@chelsio.com> Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: treewide: Consolidate {get,put}_unaligned_[bl]e24() definitionsBart Van Assche2020-03-161-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | Move the get_unaligned_be24(), get_unaligned_le24() and put_unaligned_le24() definitions from various drivers into include/linux/unaligned/generic.h. Add a put_unaligned_be24() implementation. Link: https://lore.kernel.org/r/20200313203102.16613-4-bvanassche@acm.org Cc: Keith Busch <kbusch@kernel.org> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: Jens Axboe <axboe@fb.com> Cc: Harvey Harrison <harvey.harrison@gmail.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> # For drivers/usb Reviewed-by: Felipe Balbi <balbi@kernel.org> # For drivers/usb/gadget Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: use an enum to track emulate_ua_intlck_ctrlDavid Disseldorp2020-02-211-3/+8
| | | | | | | | | | | | | The emulate_ua_intlck_ctrl device attribute accepts values of 0, 1 or 2 via ConfigFS, which map to unit attention interlocks control codes in the MODE SENSE control Mode Page. Use an enum to track these values so that it's clear that, unlike the remaining emulate_X attributes, emulate_ua_intlck_ctrl isn't boolean. Link: https://marc.info/?l=target-devel&m=158227825428798 Suggested-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: convert boolean se_dev_attrib types to boolDavid Disseldorp2020-02-211-16/+16
| | | | | | | | | | This should harden us against configfs API regressions similar to the one fixed by the previous commit. Link: https://marc.info/?l=target-devel&m=158211731505174 Signed-off-by: David Disseldorp <ddiss@suse.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: target: fix unmap_zeroes_data boolean initialisationDavid Disseldorp2020-02-211-1/+1
| | | | | | | | | | | | | | | | | | | | The LIO unmap_zeroes_data device attribute is mapped to the LBPRZ flag in the READ CAPACITY(16) and Thin Provisioning VPD INQUIRY responses. The unmap_zeroes_data attribute is exposed via configfs, where any write value is correctly validated via strtobool(). However, when initialised via target_configure_unmap_from_queue() it takes the value of the device's max_write_zeroes_sectors queue limit, which is non-boolean. A non-boolean value can be read from configfs, but attempting to write the same value back results in -EINVAL, causing problems for configuration utilities such as targetcli. Link: https://marc.info/?l=target-devel&m=158213354011309 Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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